WO2012079982A2 - Axial washer for a gear-type pump and gear-type pump comprising an axial washer of this type - Google Patents
Axial washer for a gear-type pump and gear-type pump comprising an axial washer of this type Download PDFInfo
- Publication number
- WO2012079982A2 WO2012079982A2 PCT/EP2011/071358 EP2011071358W WO2012079982A2 WO 2012079982 A2 WO2012079982 A2 WO 2012079982A2 EP 2011071358 W EP2011071358 W EP 2011071358W WO 2012079982 A2 WO2012079982 A2 WO 2012079982A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal
- axial
- pump
- axial disc
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/005—Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
- F04C27/006—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type pumps, e.g. gear pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0007—Radial sealings for working fluid
- F04C15/0015—Radial sealings for working fluid of resilient material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0007—Radial sealings for working fluid
- F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0023—Axial sealings for working fluid
- F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
- F04C2230/602—Gap; Clearance
Definitions
- the invention relates to an axial disc for a gear pump and a gear pump with at least one such axial disc according to the features of the preambles of claims 1 or 4.
- Axial discs are known for axial sealing and gap compensation on the two sides of the gears of gear pumps.
- the axial disc is axially movable and held against rotation.
- the pump chamber is a peripheral portion between the two gears in which the gears do not mesh with each other and in which the gears in operation of the gear pump, ie with rotating drive their gears, promotes liquid in the circumferential direction from a suction side to a pressure side of the gear pump.
- the pressure range is an area of the pump space in which, when operating the gear pump due to their conveying effect a higher
- Pressure prevails as on the suction side or in which the pressure rises to the pressure on the pressure side.
- the pressure field is a crescent-shaped, shallow depression which extends over the pressure region of the pump chamber and communicates with the pressure range of the gear pump.
- the pressure field does not have to have exactly the shape and size of the pressure area of the pump space, usually the pressure field has a larger area than the pressure area of the pump space, so that the external pressure application results in a force which forces the axial disk inwards against the sides of the gear wheels of the
- Gear pump presses The pressure field is sealed by a gasket that encloses the pressure field.
- the seal is located in a groove which runs along an edge of the pressure field.
- the axial disc according to the invention with the features of claim 1 has on its outer side a seal which encloses a pressure field.
- the seal is applied to the axial disk as a flowable and setting compound.
- the compound is pasty for application and is applied with a nozzle to the axial disc, which gives the mass the cross-sectional shape of the seal.
- a nozzle orifice surrounds the pressure field on the axial disk, so that the mass applied, for example, in the form of laces or caterpillars, which forms the seal after setting, encloses the pressure field.
- the mass Upon exiting the nozzle, the mass is so viscous that it retains its shape, ie both its course surrounding the pressure field and its cross-sectional shape.
- the mass applied to the axial disk forms the seal which encloses the pressure field of the axial disk.
- the mass preferably binds off rubber-elastic, so that it forms an elastic seal.
- setting is meant a solidification of the flowable, for example, pasty mass to the seal regardless of the solidification mechanism.
- the seal is as I said after setting preferably (rubber) elastic.
- the invention has the advantage of a good hold of the seal, in particular also when pressure is applied from the outside.
- Another advantage is the suitability of the inventive seal for automatic production and attachment to the axial disc by the seal is applied as described as pasty sealant through a nozzle on the axial disc, the nozzle of a robot or other machine along the edge of the Pressure field over the axial disc or vice versa, the axial disc is guided over the nozzle orifice.
- a mounting of the seal so the insertion of a sealing ring in a groove on the edge of the pressure field is eliminated.
- there is no danger that the seal will not fit into the groove when the gear pump is assembled. It is also conceivable to apply the seal with an injection mold on the axial disc.
- the injection mold has the shape of the seal as a cavity and is used for injection molding the seal, i. H. for applying the sealing compound, the setting compound on the Axilascale braced with the axial disc, so that the axial disc closes the cavity of the injection mold (covering) and the setting mass can be injected into the cavity.
- the seal is applied in a groove or a groove which surrounds the pressure field.
- the groove or groove supports the seal against pressurization parallel to the outside of the thrust washer, with a throat supporting the seal in one direction only.
- Claim 4 has a gear pump with an axial disc, as has been explained above, the subject.
- the gear pump preferably has axial disks on both sides of its gears.
- the pressure field may be on the outside of the axial disc and / or on an inner wall of the pump housing. housing, between which and the gears of the gear pump, the axial disc is arranged to be provided.
- the flowable and setting compound which forms the seal after setting, be applied to the outside of the axial disc and / or the inner wall of the pump housing, which also has the possibility to apply the seal on the axial disc and the pressure field on the inner wall of the Provide gear pump or vice versa.
- Claim 5 provides that the gear pump is an internal gear pump.
- the gear pump according to the invention is provided in particular as a hydraulic pump for conveying brake fluid in a hydraulic, slip-controlled and / or external power vehicle brake system.
- Such pumps are often referred to as recirculation pumps, although not necessarily true.
- Figure 1 is a side view of a gear pump according to the invention without pump housing
- Figure 2 is an axial section along line II-II in Figure 1;
- FIG. 3 shows a view of an axial disk according to the invention of the gear pump from FIGS. 1 and 2.
- the inventive gear pump 1 shown in Figures 1 and 2 is an internal gear pump and is intended for use as a hydraulic pump for generating a hydraulic brake pressure in a hydraulic, slip-controlled and / or foreign-powered vehicle brake system, not shown.
- Such hydraulic pumps for vehicle brake systems are, although not necessarily true, also referred to as return pumps.
- the gear pump 1 has two meshing gears 2, 3, namely a designated here as a pinion 2, externally toothed gear and an internally toothed ring gear 3.
- the pinion 2 is rotatably mounted on a pump shaft 4, it is by rotary drive of Pump shaft 4 rotatably driven and in turn drives the ring gear 3 to rotate, which is rotatably mounted in a bearing ring 5 slidably.
- the gears 2, 3 define a sickle-shaped pump chamber 6 between them, in which a sickle-shaped separator 7 is arranged, which divides the pump chamber 6 into a suction region 8 and a pressure region 9.
- a pin 10 which passes through the pump chamber 6 transversely, holds the separator 7, the separator 7 is pivotally mounted on the pin 10. Teeth of teeth of the gears 2, 3 abut on an outer or inner side of the separator 7 and slide along the outer or inner side of the separator 7, when the gears 2, 3 are driven to rotate.
- the gears 2, 3 promote brake fluid or generally liquid, which is enclosed in interdental spaces of their teeth, from the suction area 8 to the pressure area 9, that is from an inlet to a nem Outlet of the gear pump 1.
- a pump outlet is made through a slot 12 of an axial disc to be explained yet 13th
- FIG. 3 shows an outer side of one of the two axial disks 13.
- the axial disks 13 are located in a space between the gear wheels 2, 3 and inner walls 14, 15 of a pump housing 16.
- the axial disks 13 cover at least the pressure region 9 of the pump chamber 6, in the exemplary embodiment the axial discs 13 in the form of circular segments which occupy more than one semicircular surface and at a transition from a circular edge 17 to a chordwise extending, straight edge 18 having a slanted stepped recess 19.
- the axial discs 13 have a hole 20 for the pump shaft 4 and a hole 21 for the pin 10, which holds the sickle-shaped separator 7, on.
- the Axialusionn 13 are movable in the axial direction and are rotatably held by the pump shaft 4 and the pin 10. With their inner sides facing the toothed wheels 2, 3, the axial discs 13 lie on sides of the toothed wheels 2, 3 and of the sickle-shaped
- the axial discs 13 each have a pressure field 22.
- This is a flat, crescent-shaped depression in the outer sides of the axial discs 13, which extends from a central region of the separator 7 to over the pressure range of the pump chamber 6.
- the pressure field 22 extends to close to the circular edge 17 of the axial disc 13, inside close to the hole 20 for the pump shaft 4.
- the pressure field 22 is enclosed by a groove in which a seal 23 is located.
- the seal 23 is applied as a flowable, pasty mass prior to assembly of the Zahradpumpe 1 shaping in the pressure field 22 enclosing groove of the axial disc 13.
- the nozzle orifice is moved to order the mass along the groove.
- the nozzle is shaping, it gives the mass, as far as it protrudes from the groove, its cross-sectional shape.
- the mass When applied to the groove of the axial disk 13 enclosing the pressure field 22, the mass is so viscous that it releases the oil
- the mass protrudes in a bead shape with a semicircular cross section out of the groove over the outside of the axial disk 13.
- the pressure field 22 enclosing groove in the outside of the thrust washer 13 supports the flowable mass and simplifies the seal production by reducing the risk of flow of the mass.
- By setting the seal 23 connects cohesively with the Axialusion 13. After setting and assembly of the gear pump 1 is the seal 23, which as already said bulge somewhat beyond the outside of the axial disc 13, on the inner wall 14, 15 of the pump housing 16 and seals the pressure pad 22 on the inner wall 14, 15 from.
- the one inner wall 14 is formed by a bottom of a stepped counterbore of the pump housing 16, in which the gear pump 1 is installed.
- the other inner wall 15 is formed by an inner side of a housing cover 24, which closes the pump housing 16.
- the axial disc 13 on the already mentioned arcuate slot 12 which passes through the axial disc 13.
- the slot 12 is located in the pressure region 9 of the pump chamber 6, so that the pressure field 22 communicates with the pressure region 9 of the gear pump 1 designed as an internal gear pump.
- the pressure fields 22 of the axial discs 13 are thus subjected to the pressure in the pressure region 9 of the gear pump. 1 prevails, so with the pressure of the pump outlet.
- This pressurization acts on the outer sides of the axial discs 13 and pushes them with their inner sides in sealing contact with the gears 2, 3 and the separator 7 of the gear pump 1, whereby the lateral sealing of the pump chamber 6 in the pressure region 9 is achieved.
- the pressure area 9 communicates through the slot
- the pump housing 16 is part of a hydraulic block of an otherwise not shown slip control device of a hydraulic vehicle brake system. Except the gear pump 1, which forms a hydraulic pump of the slip control device, further hydraulic components such as solenoid valves in the pump housing 16 forming the hydraulic block are used and hydraulically interconnected. Such hydraulic blocks are the
- Gasket 23 applied by molding and thereby materially connected to the axial disc 13, it holds such a pressurization from the outside.
- the seal gets 23 hold by the pressure field 22 enclosing groove in which the seal 23 is located.
- the groove with the seal 23 and / or the pressure pad 22 may instead be provided in the outer side of the axial discs 13 in the inner walls 14, 15 of the pump housing 16, wherein the seal 23 in the outside of the axial disc 13 and the pressure pad 22 in the inner wall 14, 15 of the pump housing 16 or vice versa can be provided. Also it is possible that
- Pressure field 22 and / or the seal 23 both on the outside of the axial To provide discs 13 and on the inner walls 14, 15 of the pump housing 16 (not shown).
- the pump shaft 4 is slide-mounted with two bearing bushes 26 on both sides of the toothed wheels 2, 3 in the pump housing 16 and in the housing cover 24 and sealed with a seal 27 in the housing cover 24.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Beschreibung description
Titel title
Axialscheibe für eine Zahnradpumpe und Zahnradpumpe mit einer solchen Axialscheibe Axial disc for a gear pump and gear pump with such an axial disc
Die Erfindung betrifft eine Axialscheibe für eine Zahnradpumpe und eine Zahnradpumpe mit mindestens einer solchen Axialscheibe gemäß den Merkmalen der Oberbegriffe der Ansprüche 1 oder 4. Stand der Technik The invention relates to an axial disc for a gear pump and a gear pump with at least one such axial disc according to the features of the preambles of claims 1 or 4. Prior art
Axialscheiben sind zur axialen Abdichtung und zur Spaltkompensation auf den beiden Seiten der Zahnräder von Zahnradpumpen bekannt. Beispielhaft wird auf das Patent DE 196 13 833 B4 verwiesen, das eine Innenzahnradpumpe mit je einer Axialscheibe auf jeder Seite ihrer Zahnräder aufweist. Die Axialscheibe ist axial beweglich und drehfest gehalten. Auf ihrer Außenseite, das ist eine den Zahnrädern der Zahnradpumpe abgewandte Seite, ist die Axialscheibe druckbeaufschlagt und wird mit ihrer den Zahnrädern zugewandten Innenseite gegen die Zahnräder gedrückt, um einen Druckbereich eines Pumpenraums axial abzudich- ten. Der Pumpenraum ist ein Umfangsabschnitt zwischen den beiden Zahnrädern, in dem die Zahnräder nicht miteinander kämmen und in dem die Zahnräder bei Betrieb der Zahnradpumpe, d.h. bei drehendem Antrieb ihrer Zahnräder, Flüssigkeit in Umfangsrichtung von einer Saugseite zu einer Druckseite der Zahnradpumpe fördert. Der Druckbereich ist ein Bereich des Pumpenraums, in dem bei Betrieb der Zahnradpumpe aufgrund ihrer Förderwirkung ein höhererAxial discs are known for axial sealing and gap compensation on the two sides of the gears of gear pumps. For example, reference is made to the patent DE 196 13 833 B4, which has an internal gear pump, each with an axial disc on each side of their gears. The axial disc is axially movable and held against rotation. On its outer side, which is a side facing away from the gears of the gear pump, the axial disc is pressurized and is pressed with its inner side facing the gears against the gears to axially seal a pressure region of a pump chamber. The pump chamber is a peripheral portion between the two gears in which the gears do not mesh with each other and in which the gears in operation of the gear pump, ie with rotating drive their gears, promotes liquid in the circumferential direction from a suction side to a pressure side of the gear pump. The pressure range is an area of the pump space in which, when operating the gear pump due to their conveying effect a higher
Druck als auf der Saugseite herrscht bzw. in dem der Druck auf den Druck auf der Druckseite steigt. Pressure prevails as on the suction side or in which the pressure rises to the pressure on the pressure side.
Zur Druckbeaufschlagung weist die bekannte Innenzahnradpumpe ein Druckfeld für jede ihrer beiden Axialscheiben auf. Das Druckfeld ist eine sichelförmige, flache Vertiefung, die sich über den Druckbereich des Pumpenraums erstreckt und mit dem Druckbereich der Zahnradpumpe kommuniziert. Das Druckfeld muss nicht exakt Form und Größe des Druckbereichs des Pumpenraums aufweisen, üblicherweise weist das Druckfeld eine größere Fläche als der Druckbereich des Pumpenraums auf, so dass sich durch die Druckbeaufschlagung von außen eine Kraft ergibt, die die Axialscheibe nach innen gegen die Seiten der Zahnräder derTo pressurize the known internal gear pump on a pressure field for each of its two axial discs. The pressure field is a crescent-shaped, shallow depression which extends over the pressure region of the pump chamber and communicates with the pressure range of the gear pump. The pressure field does not have to have exactly the shape and size of the pressure area of the pump space, usually the pressure field has a larger area than the pressure area of the pump space, so that the external pressure application results in a force which forces the axial disk inwards against the sides of the gear wheels of the
Zahnradpumpe drückt. Das Druckfeld wird von einer Dichtung abgedichtet, die das Druckfeld umschließt. Die Dichtung liegt in einer Nut ein, die entlang eines Randes des Druckfelds verläuft. Bei einer Druckbeaufschlagung von außen, womit gemeint ist, dass ein Druck außerhalb des Druckfelds, der auf die Dichtung des Druckfelds wirkt, größer als im Druckfeld ist, besteht die Gefahr, dass die Dichtung in das Druckfeld gedrückt wird, weil die Nut, in der die Dichtung einliegt, auf der Seite des Druckfelds um eine Tiefe des Druckfelds niedriger als auf der Außenseite ist, was zur Folge hat, dass die Dichtung auf der Seite des Druckfelds schlechter abgestützt ist als nach außen. Gear pump presses. The pressure field is sealed by a gasket that encloses the pressure field. The seal is located in a groove which runs along an edge of the pressure field. When pressure is applied from the outside, meaning that a pressure outside the pressure field, which acts on the seal of the pressure field, is greater than in the pressure field, there is a risk that the seal is pressed into the pressure field, because the groove in the the gasket rests on the side of the pressure field is lower by a depth of the pressure field than on the outside, with the result that the seal on the side of the pressure field is worse supported than outwards.
Offenbarung der Erfindung Die erfindungsgemäße Axialscheibe mit den Merkmalen des Anspruchs 1 weist auf ihrer Außenseite eine Dichtung auf, die ein Druckfeld umschließt. Erfindungsgemäß ist die Dichtung als fließfähige und abbindende Masse auf die Axialscheibe aufgetragen. Beispielsweise ist die Masse zum Auftragen pastös und wird mit einer Düse auf die Axialscheibe aufgetragen, die der Masse die Quer- schnittsform der Dichtung gibt. Mit einer Düsenmündung wird das Druckfeld auf der Axialscheibe umrundet, so dass die beispielsweise schnür- oder raupenför- mig aufgetragene Masse, die nach dem Abbinden die Dichtung bildet, das Druckfeld umschliesst. Beim Austritt aus der Düse ist die Masse so zähflüssig, dass sie ihre Form beibehält, d. h. sowohl ihren das Druckfeld umschliessenden Verlauf als auch ihre Querschnittsform. Nach einem Abbinden bildet die auf die Axialscheibe aufgetragene Masse die Dichtung, die das Druckfeld der Axialscheibe umschliesst. Durch das Abbinden ist die die Dichtung bildende Masse und damit die Dichtung stoffschlüssig, also wie aufgeklebt, mit der Axialscheibe verbunden. Die Masse bindet vorzugsweise gummielastisch ab, so dass sie eine elastische Dichtung bildet. Mit Abbinden ist eine Verfestigung der fließfähigen, beispielsweise pastösen Masse zu der Dichtung gemeint unabhängig vom Verfestigungsmechanismus. Die Dichtung ist wie gesagt nach dem Abbinden vorzugsweise (gummi-)elastisch. DISCLOSURE OF THE INVENTION The axial disc according to the invention with the features of claim 1 has on its outer side a seal which encloses a pressure field. According to the invention, the seal is applied to the axial disk as a flowable and setting compound. For example, the compound is pasty for application and is applied with a nozzle to the axial disc, which gives the mass the cross-sectional shape of the seal. A nozzle orifice surrounds the pressure field on the axial disk, so that the mass applied, for example, in the form of laces or caterpillars, which forms the seal after setting, encloses the pressure field. Upon exiting the nozzle, the mass is so viscous that it retains its shape, ie both its course surrounding the pressure field and its cross-sectional shape. After setting, the mass applied to the axial disk forms the seal which encloses the pressure field of the axial disk. By setting the seal forming mass and thus the seal is firmly bonded, so as glued, connected to the axial disc. The mass preferably binds off rubber-elastic, so that it forms an elastic seal. By setting is meant a solidification of the flowable, for example, pasty mass to the seal regardless of the solidification mechanism. The seal is as I said after setting preferably (rubber) elastic.
Die Erfindung hat den Vorteil eines guten Halts der Dichtung insbesondere auch bei einer Druckbeaufschlagung von außen. Ein weiterer Vorteil ist die Eignung der erfindungsgemäßen Dichtung zu einer automatischen Herstellung und Anbringung an der Axialscheibe, indem die Dichtung wie beschrieben als pastöse Dichtmasse durch eine Düse auf die Axialscheibe aufgetragen wird, wobei die Düse von einem Roboter oder einer sonstigen Maschine entlang des Randes des Druckfelds über die Axialscheibe oder umgekehrt die Axialscheibe über die Düsenmündung geführt wird. Eine Montage der Dichtung, also das Einlegen eines Dichtrings in eine Nut am Rand des Druckfelds entfällt. Ebenso entfällt die Gefahr, dass die Dichtung bei Zusammenbau der Zahnradpumpe nicht wie vorgesehen in der Nut einliegt. Auch ist denkbar, die Dichtung mit einer Spritzgießform auf die Axialscheibe aufzutragen. Die Spritzgießform weist die Form der Dichtung als Kavität auf und wird zum Spritzgießen der Dichtung, d. h. zum Auftragen der die Dichtung bildenden, abbindenden Masse auf die Axilascheibe mit der Axialscheibe verspannt, so dass die Axialscheibe die Kavität der Spritzgießform schließt (abdeckt) und die abbindende Masse in die Kavität gepritzt werden kann. The invention has the advantage of a good hold of the seal, in particular also when pressure is applied from the outside. Another advantage is the suitability of the inventive seal for automatic production and attachment to the axial disc by the seal is applied as described as pasty sealant through a nozzle on the axial disc, the nozzle of a robot or other machine along the edge of the Pressure field over the axial disc or vice versa, the axial disc is guided over the nozzle orifice. A mounting of the seal, so the insertion of a sealing ring in a groove on the edge of the pressure field is eliminated. Likewise, there is no danger that the seal will not fit into the groove when the gear pump is assembled. It is also conceivable to apply the seal with an injection mold on the axial disc. The injection mold has the shape of the seal as a cavity and is used for injection molding the seal, i. H. for applying the sealing compound, the setting compound on the Axilascheibe braced with the axial disc, so that the axial disc closes the cavity of the injection mold (covering) and the setting mass can be injected into the cavity.
Es ist möglich, das Druckfeld in der Außenseite der Axialscheibe und/oder einer Innenwandung eines Pumpengehäuses der Zahnradpumpe vorzusehen, zwischen der und den Zahnrädern der Zahnradpumpe die Axialscheibe angeordnet ist. Anspruch 2 sieht das Druckfeld an der Außenseite der Axialscheibe vor. It is possible to provide the pressure field in the outer side of the axial disc and / or an inner wall of a pump housing of the gear pump, between which and the gears of the gear pump, the axial disc is arranged. Claim 2 provides the pressure field on the outside of the axial disc.
Für einen guten Halt der Dichtung sieht Anspruch 3 vor, dass die Dichtung in eine Kehle oder eine Nut aufgetragen ist, die das Druckfeld umschließt. Die Kehle oder Nut stützt die Dichtung gegen eine Druckbeaufschlagung parallel zur Außenseite der Axialscheibe ab, wobei eine Kehle die Dichtung nur in einer Richtung abstützt. For a good grip of the seal provides claim 3, that the seal is applied in a groove or a groove which surrounds the pressure field. The groove or groove supports the seal against pressurization parallel to the outside of the thrust washer, with a throat supporting the seal in one direction only.
Anspruch 4 hat eine Zahnradpumpe mit einer Axialscheibe, wie sie vorstehend erläutert worden ist, zum Gegenstand. Vorzugsweise weist die Zahnradpumpe auf beiden Seiten ihrer Zahnräder Axialscheiben auf. Das Druckfeld kann auf der Außenseite der Axialscheibe und/oder an einer Innenwandung des Pumpenge- häuses, zwischen der und den Zahnrädern der Zahnradpumpe die Axialscheibe angeordnet ist, vorgesehen sein. Ebenso kann die fließfähige und abbindende Masse, die nach dem Abbinden die Dichtung bildet, auf die Außenseite der Axialscheibe und/oder die Innenwandung des Pumpengehäuses aufgetragen sein, wobei auch die Möglichkeit besteht, die Dichtung auf die Axialscheibe aufzutragen und das Druckfeld an der Innenwandung der Zahnradpumpe vorzusehen oder umgekehrt. Claim 4 has a gear pump with an axial disc, as has been explained above, the subject. The gear pump preferably has axial disks on both sides of its gears. The pressure field may be on the outside of the axial disc and / or on an inner wall of the pump housing. housing, between which and the gears of the gear pump, the axial disc is arranged to be provided. Likewise, the flowable and setting compound, which forms the seal after setting, be applied to the outside of the axial disc and / or the inner wall of the pump housing, which also has the possibility to apply the seal on the axial disc and the pressure field on the inner wall of the Provide gear pump or vice versa.
Anspruch 5 sieht vor, dass die Zahnradpumpe eine Innenzahnradpumpe ist. Claim 5 provides that the gear pump is an internal gear pump.
Die erfindungsgemäße Zahnradpumpe ist insbesondere als Hydropumpe zum Fördern von Bremsflüssigkeit in einer hydraulischen, schlupfgeregelten- und/oder Fremdkraft-Fahrzeugbremsanlage vorgesehen. Solche Pumpen werden, wenn auch nicht unbedingt zutreffend, oft als Rückförderpumpen bezeichnet. The gear pump according to the invention is provided in particular as a hydraulic pump for conveying brake fluid in a hydraulic, slip-controlled and / or external power vehicle brake system. Such pumps are often referred to as recirculation pumps, although not necessarily true.
Kurze Beschreibung der Zeichnung Short description of the drawing
Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen: The invention will be explained in more detail with reference to an embodiment shown in the drawing. Show it:
Figur 1 eine Seitenansicht einer erfindungsgemäßen Zahnradpumpe ohne Pumpengehäuse; Figure 1 is a side view of a gear pump according to the invention without pump housing;
Figur 2 einen Achsschnitt entlang Linie II-II in Figur 1 ; und Figure 2 is an axial section along line II-II in Figure 1; and
Figur 3 eine Ansicht einer erfindungsgemäßen Axialscheibe der Zahnradpumpe aus Figuren 1 und 2. FIG. 3 shows a view of an axial disk according to the invention of the gear pump from FIGS. 1 and 2.
Ausführungsform der Erfindung Embodiment of the invention
Die in Figuren 1 und 2 dargestellte erfindungsgemäße Zahnradpumpe 1 ist eine Innenzahnradpumpe und ist zur Verwendung als Hydropumpe zur Erzeugung eines hydraulischen Bremsdrucks in einer nicht dargestellten hydraulischen, schlupfgeregelten- und/oder Fremdkraft-Fahrzeugbremsanlage vorgesehen. Solche Hydropumpen für Fahrzeugbremsanlagen werden, wenn auch nicht unbedingt zutreffend, auch als Rückförderpumpen bezeichnet. Die Zahnradpumpe 1 weist zwei miteinander kämmende Zahnräder 2, 3, nämlich ein hier als Ritzel 2 bezeichnetes, außenverzahntes Zahnrad und ein innenverzahntes Hohlrad 3 auf. Das Ritzel 2 ist drehfest auf einer Pumpenwelle 4, es ist durch Drehantrieb der Pumpenwelle 4 drehend antreibbar und treibt seinerseits das Hohlrad 3 drehend an, das in einem Lagerring 5 drehbar gleitgelagert ist. The inventive gear pump 1 shown in Figures 1 and 2 is an internal gear pump and is intended for use as a hydraulic pump for generating a hydraulic brake pressure in a hydraulic, slip-controlled and / or foreign-powered vehicle brake system, not shown. Such hydraulic pumps for vehicle brake systems are, although not necessarily true, also referred to as return pumps. The gear pump 1 has two meshing gears 2, 3, namely a designated here as a pinion 2, externally toothed gear and an internally toothed ring gear 3. The pinion 2 is rotatably mounted on a pump shaft 4, it is by rotary drive of Pump shaft 4 rotatably driven and in turn drives the ring gear 3 to rotate, which is rotatably mounted in a bearing ring 5 slidably.
Die Zahnräder 2, 3 begrenzen einen sichelförmigen Pumpenraum 6 zwischen sich, in welchem ein sichelförmiges Trennstück 7 angeordnet ist, das den Pumpenraum 6 in einen Saugbereich 8 und einen Druckbereich 9 unterteilt. Ein Stift 10, der den Pumpenraum 6 quer durchsetzt, hält das Trennstück 7, das Trennstück 7 ist auf dem Stift 10 schwenkbar. Zahnköpfe von Zähnen der Zahnräder 2, 3 liegen an einer Außen- bzw. Innenseite des Trennstücks 7 an und gleiten ent- lang der Außen- bzw. Innenseite des Trennstücks 7, wenn die Zahnräder 2, 3 drehend angetrieben werden. Bei einem Betrieb der Zahnradpumpe 1 , also einem Drehantrieb der Zahnräder 2, 3, fördern die Zahnräder 2, 3 Bremsflüssigkeit oder allgemein Flüssigkeit, die in Zahnzwischenräumen ihrer Zähne eingeschlossen ist, vom Saugbereich 8 zum Druckbereich 9, also von einem Einlass zu ei- nem Auslass der Zahnradpumpe 1. In den Saugbereich 8 mündet eine Einlassbohrung 1 1 , ein Pumpenauslass erfolgt durch einen Schlitz 12 einer noch zu erläuternden Axialscheibe 13. The gears 2, 3 define a sickle-shaped pump chamber 6 between them, in which a sickle-shaped separator 7 is arranged, which divides the pump chamber 6 into a suction region 8 and a pressure region 9. A pin 10, which passes through the pump chamber 6 transversely, holds the separator 7, the separator 7 is pivotally mounted on the pin 10. Teeth of teeth of the gears 2, 3 abut on an outer or inner side of the separator 7 and slide along the outer or inner side of the separator 7, when the gears 2, 3 are driven to rotate. In an operation of the gear pump 1, that is, a rotary drive of the gears 2, 3, the gears 2, 3 promote brake fluid or generally liquid, which is enclosed in interdental spaces of their teeth, from the suction area 8 to the pressure area 9, that is from an inlet to a nem Outlet of the gear pump 1. Into the suction area 8 opens an inlet hole 1 1, a pump outlet is made through a slot 12 of an axial disc to be explained yet 13th
Zur axialen Abdichtung des Pumpenraums 6 weist die als Innenzahnradpumpe ausgebildete Zahnradpumpe 1 je eine Axialscheibe 13 auf beiden Seiten derFor axial sealing of the pump chamber 6, designed as an internal gear pump gear pump 1 each have an axial disc 13 on both sides of the
Zahnräder 2, 3 auf. Soweit die Ränder 17, 18 der Axialscheiben 13 von den Zahnrädern 2, 3 verdeckt sind, sind die Ränder 17, 18 in Figur 1 mit Strichlinien gezeichnet. Figur 3 zeigt eine Außenseite einer der beiden Axialscheiben 13. Die Axialscheiben 13 befinden sich in einem Zwischenraum zwischen den Zahnrä- dem 2, 3 und Innenwandungen 14, 15 eines Pumpengehäuses 16. Die Axialscheiben 13 überdecken zumindest den Druckbereich 9 des Pumpenraums 6, im Ausführungsbeispiel weisen die Axialscheiben 13 die Form von Kreissegmenten auf, die mehr als eine Halbkreisfläche einnehmen und an einem Übergang von einem kreisförmigen Rand 17 zu einem in Sehnenrichtung verlaufenden, geraden Rand 18 eine schrägstufenförmige Ausnehmung 19 aufweisen. Die Axialscheiben 13 weisen ein Loch 20 für die Pumpenwelle 4 und ein Loch 21 für den Stift 10, der das sichelförmige Trennstück 7 hält, auf. Die Axialscheiben 13 sind in axialer Richtung beweglich und werden von der Pumpenwelle 4 und dem Stift 10 drehfest gehalten. Mit ihren den Zahnrädern 2, 3 zugewandten Innenseiten lie- gen die Axialscheiben 13 an Seiten der Zahnräder 2, 3 und des sichelförmigenGears 2, 3 on. As far as the edges 17, 18 of the axial discs 13 are covered by the gears 2, 3, the edges 17, 18 are drawn in Figure 1 with dashed lines. FIG. 3 shows an outer side of one of the two axial disks 13. The axial disks 13 are located in a space between the gear wheels 2, 3 and inner walls 14, 15 of a pump housing 16. The axial disks 13 cover at least the pressure region 9 of the pump chamber 6, in the exemplary embodiment the axial discs 13 in the form of circular segments which occupy more than one semicircular surface and at a transition from a circular edge 17 to a chordwise extending, straight edge 18 having a slanted stepped recess 19. The axial discs 13 have a hole 20 for the pump shaft 4 and a hole 21 for the pin 10, which holds the sickle-shaped separator 7, on. The Axialscheiben 13 are movable in the axial direction and are rotatably held by the pump shaft 4 and the pin 10. With their inner sides facing the toothed wheels 2, 3, the axial discs 13 lie on sides of the toothed wheels 2, 3 and of the sickle-shaped
Trennstücks 7 an und dichten den Pumpenraum 6 seitlich ab. Auf ihren den Zahnrädern 2, 3 abgewandten Außenseiten weisen die Axialscheiben 13 jeweils ein Druckfeld 22 auf. Dabei handelt es sich um eine flache, sichelförmige Vertiefung in den Außenseiten der Axialscheiben 13, dich sich von einem mittleren Bereich des Trennstücks 7 bis über den Druckbereich des Pumpenraums 6 erstreckt. Außen reicht das Druckfeld 22 bis nahe an den kreisförmigen Rand 17 der Axialscheibe 13, innen bis nahe an das Loch 20 für die Pumpenwelle 4. Das Druckfeld 22 ist von einer Nut umschlossen, in der sich eine Dichtung 23 befindet. Die Dichtung 23 ist als fließfähige, pastöse Masse vor einem Zu- sammenbau der Zahradpumpe 1 formgebend in die das Druckfeld 22 umschließende Nut der Axialscheibe 13 aufgetragen. Der Auftrag erfolgt mit einer nicht gezeichneten Düse, deren Düsenmündung zum Auftrag der Masse entlang der Nut bewegt wird. Die Düse ist formgebend, sie gibt der Masse, soweit sie aus der Nut übersteht, ihr Querschnittsform. Beim Auftragen in die das Druckfeld 22 um- schliessende Nut der Axialscheibe 13 ist die Masse so zähflüssig, dass sie dieSeparator 7 and seal the pump chamber 6 from the side. On their outer sides facing away from the toothed wheels 2, 3, the axial discs 13 each have a pressure field 22. This is a flat, crescent-shaped depression in the outer sides of the axial discs 13, which extends from a central region of the separator 7 to over the pressure range of the pump chamber 6. On the outside, the pressure field 22 extends to close to the circular edge 17 of the axial disc 13, inside close to the hole 20 for the pump shaft 4. The pressure field 22 is enclosed by a groove in which a seal 23 is located. The seal 23 is applied as a flowable, pasty mass prior to assembly of the Zahradpumpe 1 shaping in the pressure field 22 enclosing groove of the axial disc 13. The job is carried out with a nozzle not shown, the nozzle orifice is moved to order the mass along the groove. The nozzle is shaping, it gives the mass, as far as it protrudes from the groove, its cross-sectional shape. When applied to the groove of the axial disk 13 enclosing the pressure field 22, the mass is so viscous that it releases the oil
Form und Querschnitts, die ihr die Düse gibt, beibehält. Im Ausführungsbeispiel steht die Masse wulstförmig mit halbkreisförmigem Querschnitt aus der Nut über die Außenseite der Axialscheibe 13 vor. Die das Druckfeld 22 umschliessende Nut in der Außenseite der Axialscheibe 13 stützt die fließfähig Masse ab und vereinfacht die Dichtungsherstellung, indem sie die Gefahr eines Wegfließens der Masse verringert. Durch das Abbinden verbindet sich die Dichtung 23 stoffschlüssig mit der Axialscheibe 13. Nach dem Abbinden und dem Zusammenbau der Zahnradpumpe 1 liegt die Dichtung 23, die wie schon gesagt wulstförmig etwas über die Außenseite der Axialscheibe 13 übersteht, an der Innenwandung 14, 15 des Pumpengehäuses 16 an und dichtet das Druckfeld 22 an der Innenwandung 14, 15 ab. Die eine Innenwandung 14 ist von einem Grund einer gestuften Ansenkung des Pumpengehäuses 16 gebildet, in welches die Zahnradpumpe 1 eingebaut ist. Die andere Innenwandung 15 ist von einer Innenseite eines Gehäusedeckels 24 gebildet, der das Pumpengehäuse 16 verschließt. Shape and cross section, which gives the nozzle, maintains. In the exemplary embodiment, the mass protrudes in a bead shape with a semicircular cross section out of the groove over the outside of the axial disk 13. The pressure field 22 enclosing groove in the outside of the thrust washer 13 supports the flowable mass and simplifies the seal production by reducing the risk of flow of the mass. By setting the seal 23 connects cohesively with the Axialscheibe 13. After setting and assembly of the gear pump 1 is the seal 23, which as already said bulge somewhat beyond the outside of the axial disc 13, on the inner wall 14, 15 of the pump housing 16 and seals the pressure pad 22 on the inner wall 14, 15 from. The one inner wall 14 is formed by a bottom of a stepped counterbore of the pump housing 16, in which the gear pump 1 is installed. The other inner wall 15 is formed by an inner side of a housing cover 24, which closes the pump housing 16.
Innerhalb des Druckfelds 22 weist die Axialscheibe 13 den bereits angesprochenen bogenförmigen Schlitz 12 auf, der die Axialscheibe 13 durchsetzt. Der Schlitz 12 befindet sich im Druckbereich 9 des Pumpenraums 6, so dass das Druckfeld 22 mit dem Druckbereich 9 der als Innenzahnradpumpe ausgebildeten Zahnradpumpe 1 kommuniziert. Die Druckfelder 22 der Axialscheiben 13 werden also mit dem Druck beaufschlagt, der im Druckbereich 9 der Zahnradpumpe 1 herrscht, also mit dem Druck des Pumpenauslass. Diese Druckbeaufschlagung beaufschlagt die Außenseiten der Axialscheiben 13 und drückt diese mit ihren Innenseiten in dichtende Anlage an die Zahnräder 2, 3 und das Trennstück 7 der Zahnradpumpe 1 , wodurch die seitliche Abdichtung des Pumpenraums 6 im Druckbereich 9 erzielt wird. Der Druckbereich 9 kommuniziert durch den SchlitzWithin the pressure field 22, the axial disc 13 on the already mentioned arcuate slot 12 which passes through the axial disc 13. The slot 12 is located in the pressure region 9 of the pump chamber 6, so that the pressure field 22 communicates with the pressure region 9 of the gear pump 1 designed as an internal gear pump. The pressure fields 22 of the axial discs 13 are thus subjected to the pressure in the pressure region 9 of the gear pump. 1 prevails, so with the pressure of the pump outlet. This pressurization acts on the outer sides of the axial discs 13 and pushes them with their inner sides in sealing contact with the gears 2, 3 and the separator 7 of the gear pump 1, whereby the lateral sealing of the pump chamber 6 in the pressure region 9 is achieved. The pressure area 9 communicates through the slot
12 einer der beiden Axialscheiben 13 mit einer Auslassbohrung 25 im Pumpengehäuse 16. 12 one of the two axial plates 13 with an outlet bore 25 in the pump housing 16th
Durch das formgebende Auftragen der Dichtung 23 als zunächst pastöse Masse, die in der das Druckfeld 22 umschließenden Nut der Axialscheibe 13 zu der elastischen Dichtung 23 abbindet, ist die Dichtung 23 stoffschlüssig mit der Axialscheibe 13 verbunden. Zusätzlichen Halt bekommt die Dichtung 23 dadurch, dass sie in die das Druckfeld 22 umschließende Nut aufgetragen ist. Im Ausführungsbeispiel ist das Pumpengehäuse 16 Teil eines Hydraulikblocks einer im übrigen nicht dargestellten Schlupfregeleinrichtung einer hydraulischen Fahrzeugbremsanlage. Außer der Zahnradpumpe 1 , die eine Hydropumpe der Schlupfregeleinrichtung bildet, sind weitere hydraulische Bauelemente wie Magnetventile in den das Pumpengehäuse 16 bildenden Hydraulikblock eingesetzt und hydraulisch miteinander verschaltet. Solche Hydraulikblöcke sind demBy the forming application of the seal 23 as initially pasty mass, which sets in the pressure field 22 enclosing the groove of the axial disc 13 to the elastic seal 23, the seal 23 is materially connected to the axial disc 13. Additional hold gets the seal 23 in that it is applied in the pressure field 22 enclosing groove. In the exemplary embodiment, the pump housing 16 is part of a hydraulic block of an otherwise not shown slip control device of a hydraulic vehicle brake system. Except the gear pump 1, which forms a hydraulic pump of the slip control device, further hydraulic components such as solenoid valves in the pump housing 16 forming the hydraulic block are used and hydraulically interconnected. Such hydraulic blocks are the
Fachmann bekannt und sollen hier nicht näher erläutert werden. Zum Befüllen der Fahrzeugbremsanlage wird diese zunächst evakuiert, um Lufteinschlüsse zu vermeiden. Anschließend wird Bremsflüssigkeit eingefüllt. Dabei kann es dazu kommen, dass die Dichtung 23 des Druckfelds 22 von außen mit Druck beauf- schlagt wird, d. h. dass der Druck außen höher als im Druckfeld 22 ist. Weil dieKnown in the art and will not be explained in detail here. To fill the vehicle brake system, this is first evacuated to avoid trapped air. Subsequently, brake fluid is filled. In this case, it may happen that the seal 23 of the pressure field 22 is pressurized from outside, i. H. the pressure on the outside is higher than in the pressure field 22. Because the
Dichtung 23 formgebend aufgetragen und dadurch stoffschlüssig mit der Axialscheibe 13 verbunden ist, hält sie einer solchen Druckbeaufschlagung von außen stand. Zusätzlich bekommt die Dichtung 23 Halt durch die das Druckfeld 22 umschließende Nut, in der die sich die Dichtung 23 befindet. Gasket 23 applied by molding and thereby materially connected to the axial disc 13, it holds such a pressurization from the outside. In addition, the seal gets 23 hold by the pressure field 22 enclosing groove in which the seal 23 is located.
Die Nut mit der Dichtung 23 und/oder das Druckfeld 22 können anstatt in der Außenseite der Axialscheiben 13 in den Innenwandungen 14, 15 des Pumpengehäuses 16 vorgesehen sein, wobei auch die Dichtung 23 in der Außenseite der Axialscheibe 13 und das Druckfeld 22 in der Innenwandung 14, 15 des Pumpen- gehäuses 16 oder umgekehrt vorgesehen sein können. Auch ist es möglich, dasThe groove with the seal 23 and / or the pressure pad 22 may instead be provided in the outer side of the axial discs 13 in the inner walls 14, 15 of the pump housing 16, wherein the seal 23 in the outside of the axial disc 13 and the pressure pad 22 in the inner wall 14, 15 of the pump housing 16 or vice versa can be provided. Also it is possible that
Druckfeld 22 und/oder die Dichtung 23 sowohl auf der Außenseite der Axial- Scheiben 13 als auch an den Innenwandungen 14, 15 des Pumpengehäuses 16 vorzusehen (nicht dargestellt). Pressure field 22 and / or the seal 23 both on the outside of the axial To provide discs 13 and on the inner walls 14, 15 of the pump housing 16 (not shown).
Die Pumpenwelle 4 ist mit zwei Lagerbuchsen 26 auf beiden Seiten der Zahnrä- der 2, 3 im Pumpengehäuse 16 und im Gehäusedeckel 24 gleitgelagert und mit einer Dichtung 27 im Gehäusedeckel 24 abgedichtet. The pump shaft 4 is slide-mounted with two bearing bushes 26 on both sides of the toothed wheels 2, 3 in the pump housing 16 and in the housing cover 24 and sealed with a seal 27 in the housing cover 24.
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/994,754 US20140030129A1 (en) | 2010-12-17 | 2011-11-30 | Axial washer for a gear-type pump comprising an axial washer of this type |
| EP11788516.0A EP2686556A2 (en) | 2010-12-17 | 2011-11-30 | Axial washer for a gear-type pump and gear-type pump comprising an axial washer of this type |
| JP2013543624A JP2014506969A (en) | 2010-12-17 | 2011-11-30 | Axial washers for gear pumps and gear pumps with such axial washers |
| KR1020137015326A KR20130141595A (en) | 2010-12-17 | 2011-11-30 | Axial washer for a gear-type pump and gear-type pump comprising an axial washer of this type |
| CN201180060080.4A CN103620222A (en) | 2010-12-17 | 2011-11-30 | Axial disc for gear pump and gear pump with such an axial disc |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010063313A DE102010063313A1 (en) | 2010-12-17 | 2010-12-17 | Axial disc for a gear pump and gear pump with such an axial disc |
| DE102010063313.5 | 2010-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012079982A2 true WO2012079982A2 (en) | 2012-06-21 |
| WO2012079982A3 WO2012079982A3 (en) | 2013-12-19 |
Family
ID=45047830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2011/071358 Ceased WO2012079982A2 (en) | 2010-12-17 | 2011-11-30 | Axial washer for a gear-type pump and gear-type pump comprising an axial washer of this type |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20140030129A1 (en) |
| EP (1) | EP2686556A2 (en) |
| JP (1) | JP2014506969A (en) |
| KR (1) | KR20130141595A (en) |
| CN (1) | CN103620222A (en) |
| DE (1) | DE102010063313A1 (en) |
| WO (1) | WO2012079982A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140050561A (en) * | 2012-10-19 | 2014-04-29 | 로베르트 보쉬 게엠베하 | Internal gear pump for a hydraulic vehicle brake system |
| WO2015133342A1 (en) * | 2014-03-06 | 2015-09-11 | 日本オイルポンプ株式会社 | Pump device |
| JP2016504531A (en) * | 2013-01-29 | 2016-02-12 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Inscribed gear pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012213771B4 (en) | 2012-08-03 | 2025-04-24 | Robert Bosch Gmbh | Internal gear pump |
| KR200486890Y1 (en) | 2016-07-05 | 2018-07-11 | 훌루테크 주식회사 | Internal gear pump of combined structure simplified |
| DE102018212497A1 (en) | 2018-07-26 | 2020-01-30 | Eckerle Technologies GmbH | Fluid delivery device |
| DE202022002997U1 (en) * | 2021-08-05 | 2024-04-18 | Hydraulik Nord Technologies GmbH | Internal gear machine |
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| DE19613833B4 (en) | 1996-04-06 | 2004-12-09 | Bosch Rexroth Ag | Internal gear machine, in particular internal gear pump |
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| GB1236935A (en) * | 1967-09-02 | 1971-06-23 | Plessey Co Ltd | Improvements in or relating to gear pumps more particularly for use with hot hydrocarbon liquid fuels |
| DE2300484A1 (en) * | 1973-01-05 | 1974-07-18 | Otto Eckerle | HIGH PRESSURE GEAR PUMP |
| JPS49106608A (en) * | 1973-02-16 | 1974-10-09 | ||
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| DE19930911C1 (en) * | 1999-07-06 | 2000-07-20 | Voith Turbo Kg | Geared pump has a pinion with external teeth and a meshing hollow wheel with internal teeth and axial disks and springs for a reversing action with axial compensation for the high pressures in the closed circuit |
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| JP4538213B2 (en) * | 2003-10-10 | 2010-09-08 | 日産自動車株式会社 | Seal structure using liquid gasket |
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| JP4787596B2 (en) * | 2005-10-28 | 2011-10-05 | 株式会社ブリヂストン | Gasket manufacturing method and seal structure |
| JP2008144911A (en) * | 2006-12-12 | 2008-06-26 | Three Bond Co Ltd | Sealing structure |
| JP2008307443A (en) * | 2007-06-13 | 2008-12-25 | Bridgestone Corp | Manufacturing method of sealing member |
| DE102007049704B4 (en) * | 2007-10-17 | 2019-01-31 | Robert Bosch Gmbh | Internal gear pump for a brake system |
| JP2009121601A (en) * | 2007-11-15 | 2009-06-04 | Toyota Motor Corp | Device sealing structure and method of manufacturing the same |
| JP2009299735A (en) * | 2008-06-11 | 2009-12-24 | Nok Corp | Sealing device |
| JP2010234246A (en) * | 2009-03-31 | 2010-10-21 | Nhk Spring Co Ltd | Method of coating and curing ultraviolet curable resin composition and coating and curing apparatus thereof |
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2011
- 2011-11-30 WO PCT/EP2011/071358 patent/WO2012079982A2/en not_active Ceased
- 2011-11-30 CN CN201180060080.4A patent/CN103620222A/en active Pending
- 2011-11-30 EP EP11788516.0A patent/EP2686556A2/en not_active Withdrawn
- 2011-11-30 KR KR1020137015326A patent/KR20130141595A/en not_active Ceased
- 2011-11-30 US US13/994,754 patent/US20140030129A1/en not_active Abandoned
- 2011-11-30 JP JP2013543624A patent/JP2014506969A/en active Pending
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| DE19613833B4 (en) | 1996-04-06 | 2004-12-09 | Bosch Rexroth Ag | Internal gear machine, in particular internal gear pump |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140050561A (en) * | 2012-10-19 | 2014-04-29 | 로베르트 보쉬 게엠베하 | Internal gear pump for a hydraulic vehicle brake system |
| JP2014084867A (en) * | 2012-10-19 | 2014-05-12 | Robert Bosch Gmbh | Internal gear pump for hydraulic vehicle brake equipment |
| KR102120032B1 (en) * | 2012-10-19 | 2020-06-08 | 로베르트 보쉬 게엠베하 | Internal gear pump for a hydraulic vehicle brake system |
| JP2016504531A (en) * | 2013-01-29 | 2016-02-12 | ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Inscribed gear pump |
| WO2015133342A1 (en) * | 2014-03-06 | 2015-09-11 | 日本オイルポンプ株式会社 | Pump device |
| JP2015169107A (en) * | 2014-03-06 | 2015-09-28 | 日本オイルポンプ株式会社 | pump device |
| EP3115608A4 (en) * | 2014-03-06 | 2017-11-01 | Nippon Oil Pump Co., Ltd. | Pump device |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140030129A1 (en) | 2014-01-30 |
| KR20130141595A (en) | 2013-12-26 |
| DE102010063313A1 (en) | 2012-06-21 |
| JP2014506969A (en) | 2014-03-20 |
| EP2686556A2 (en) | 2014-01-22 |
| CN103620222A (en) | 2014-03-05 |
| WO2012079982A3 (en) | 2013-12-19 |
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