WO2008012060A1 - Geared pump for feeding products with high solid content - Google Patents
Geared pump for feeding products with high solid content Download PDFInfo
- Publication number
- WO2008012060A1 WO2008012060A1 PCT/EP2007/006556 EP2007006556W WO2008012060A1 WO 2008012060 A1 WO2008012060 A1 WO 2008012060A1 EP 2007006556 W EP2007006556 W EP 2007006556W WO 2008012060 A1 WO2008012060 A1 WO 2008012060A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- sealing ring
- gear pump
- gears
- pump according
- 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
-
- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
-
- 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
- F04C2/18—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 with similar tooth forms
-
- 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
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
Definitions
- the invention relates to a gear pump for conveying products with high solids content such as granules or pet food, in which two intermeshing gears are enclosed in a housing and mounted with their bearing pins in each case a laterally adjacent to the housing housing cover, and with an inlet and an outlet for the good to be promoted.
- Gear pumps are frequently used to convey highly viscous media in which the viscosity range is, for example, from 1 mPas to 100,000 mPas. With such pumps can be light to heavy fuel oils, lubricating oils, hydraulic oils and synthetic oils promote. If gear pumps are to be used to transport animal or vegetable fat and oils, sugar solutions, high-viscosity polymers, viscose or acetate-cellulose, the viscosities can even reach 25,000,000 mPas. The higher the viscosity, the smaller the speed of the pump must be.
- the pressures amount to 100 to 1,000 bar and the gears are either straight-toothed, helical or arrow-toothed and generally made in one piece with the drive shaft or the driven shaft.
- the journals of both the drive shaft and the driven shaft are seated in plain bearings, which are typically product lubricated, which means that the journals run dry prior to conveying a product, so are not lubricated.
- plain bearings typically product lubricated, which means that the journals run dry prior to conveying a product, so are not lubricated.
- gear pumps are not suitable for conveying solids since solids can not form a lubricating film which carries the bearing journals.
- gear pumps have other advantages for the promotion of products with high solids content, which can not be realized with other pumps, such as piston pumps. These include on the one hand the constant flow rate, on the other hand high pressures, which can be reached with a gear pump.
- the gear pump of the type mentioned is characterized in that the bearing pins of the gears are mounted in rollers, and that for sealing the housing relative to the housing covers with the rolling bearings on each journal a sealing ring sits with one side to a Flank of the gears rests and is pressed with the opposite other side of a spring element sealing against the flank of the gears.
- a gear pump modified in the manner according to the invention requires reliable sealing of the roller bearings in relation to the product conveying space, since granular solids must not enter the roller bearings so as not to destroy them.
- the sealing ring according to the invention which serves with a widened or divergent Side surface bears against a respective end face of the gears and is pressed by spring elements in the axial direction against the mentioned end faces.
- Figure 1 is a section through a gear pump
- FIG 2 is a perspective view of a sealing ring according to the invention, which is used in the gear pump of Figure 1 is used;
- Figure 3 is a spring element in perspective, assembled representation, with which the sealing ring of Figure 2 is pressed against the toothed wheel flank;
- FIG. 4 is an exploded view of the spring element of FIG. 3.
- Figure 1 shows a vertical section through a gear pump with two meshing gears 2, 2 ', which are housed in a housing 1. Not recognizable are the inlet and the outlet of the gear pump, since they lie in the median plane in front of or behind the cutting plane.
- the gear pump is symmetrical, so that it is sufficient to describe only the upper part.
- the gear pump of course also has a drive shaft, a driven shaft or two drive shafts, which is not shown for reasons of clarity.
- the upper gear 2 is integrally connected to bearing journals 9, which are mounted in bearings 4, 4 1 .
- Each housing cover 3 thus contributes two rolling bearings 4, 4 ', which are spaced from each other by a partition 10. Between the rolling bearings 4, 4 'and the flanks of the gears 2, 2 1 sealing rings 5, 5' are arranged, which contact the flanks of the gears 2, 2 'and thus the rolling bearings 4, 4' with respect to the housing 1 seal.
- Each sealing ring 5 has a diameter-expanding outer end, with which it contacts the flanks of the gears 2, 2 'in a region which has been processed in a special way in order to maintain the sealing effect even after a long service life.
- One type of special processing is to apply a weld by build-up welding and then abrade to improve the hardness of the surface. This process is called "stelliting".
- the opposite inner end of the sealing ring 5 contacts a spring element 7, which is supported on the roller bearing 4 and thus the sealing ring 5 presses against the flanks of the gears 2, 2 1 .
- an O-ring 6 is inserted in each case a groove of the housing cover 3 and thus seals the outer periphery 51 of the sealing ring 5 from.
- Figure 2 shows the sealing ring 5 in a perspective view, which recognizes the widening outer end on the left side, while three recesses 50 are provided for the engagement of pins 40 on the right inner side, which prevent rotation of the sealing ring 5 during operation.
- the O-ring 6 is seated on an outer circumference 51 of the sealing ring 5, while the inner surface 52 of the sealing ring 5 is arranged at a distance from the bearing journal 9, 9 'during operation.
- FIG. 3 the spring element 7 is shown in perspective in the assembled state, while in FIG. drawn representation is reproduced.
- a cage 10 which has the shape of a horizontal U in cross-section, with one side, which is the operation of the rolling bearing 4, 4 1 is closed, is closed.
- radial bores 41 Through the upper and lower legs of the cage 10 extend radial bores 41, which serve to receive the pins 40.
- a spring washer 20 and a power transmission ring 30 are inserted, whereby the spring element 7, the sealing ring 5 in the axial direction of the bearing pin 9, 9 'can press against the flanks of the gears 2, 2'.
- the spring washer 20 is located between the power transmission ring 30 and the closed end of the cage 10.
- roller bearings 4, 4 ' which are fixed in the usual way in the housing covers 3, for example by the inner rings of the rolling bearings 4, 4' are secured to the bearing pin 9 by Seeger rings against axial displacement, the Spring element 7 against an axial displacement firmly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Zahnradpumpe zur Förderung von Produkten mit hohem Gear pump for conveying products with high
FeststoffanteilSolids
Die Erfindung betrifft eine Zahnradpumpe zur Förderung von Produkten mit hohem Feststoffanteil wie Granulat oder Tiernahrung, bei der zwei miteinander kämmende Zahnräder in einem Gehäuse eingeschlossen und mit ihren Lagerzapfen in jeweils einem seitlich an das Gehäuse anschließenden Gehäusedeckel gelagert sind, und mit einem Einlass und einem Auslass für das zu fördernde Gut.The invention relates to a gear pump for conveying products with high solids content such as granules or pet food, in which two intermeshing gears are enclosed in a housing and mounted with their bearing pins in each case a laterally adjacent to the housing housing cover, and with an inlet and an outlet for the good to be promoted.
Zahnradpumpen werden häufig zur Förderung von hochviskosen Medien eingesetzt, bei denen der Viskositätsbereich beispielsweise von 1 mPas bis 100 000 mPas reicht. Mit derartigen Pumpen lassen sich leichte bis schwere Heizöle, Schmieröle, Hydrauliköle und synthetische Öle fördern. Wenn mit Zahnradpumpen tierische oder pflanzliche Fett und Öle, Zuckerlösungen, hochviskose Polymerisate, Viskose oder Acetat- Zellulose gefördert werden sollen, können die Viskositäten sogar bis 25.000.000 mPas reichen. Dabei gilt, je höher die Viskosität, desto kleiner muss die Drehzahl der Pumpe sein. Die Drücke betragen dabei 100 bis 1.000 bar und die Zahnräder sind entweder geradverzahnt, schrägverzahnt oder pfeilverzahnt und im Allgemeinen einstückig mit der Antriebswelle bzw. der getriebenen Welle gefertigt. Die Lagerzapfen von sowohl der Antriebswelle als auch von der getriebenen Welle sitzen in Gleitlagern, die in der Regel produktgeschmiert sind, was bedeutet, dass die Lagerzapfen vor dem Fördern eines Produkts trocken laufen, also nicht geschmiert werden. Zwischen dem Lagerzapfen und der Lagerschale des Gleitlagers besteht ein kleiner Ringspalt, durch den das Produkt beim Betrieb der Pumpe in axialer Richtung des Lagerzapfens von der Druckseite der Pumpe her nach außen gedrückt und über Umlenkkanäle zur Saugseite der Pumpe zurückgeführt wird. Auf diese Weise wird der Ringspalt zwischen Lagerzapfen und Lagerschale mit Produkt gefüllt, so dass sich ein Schmierspalt bildet.Gear pumps are frequently used to convey highly viscous media in which the viscosity range is, for example, from 1 mPas to 100,000 mPas. With such pumps can be light to heavy fuel oils, lubricating oils, hydraulic oils and synthetic oils promote. If gear pumps are to be used to transport animal or vegetable fat and oils, sugar solutions, high-viscosity polymers, viscose or acetate-cellulose, the viscosities can even reach 25,000,000 mPas. The higher the viscosity, the smaller the speed of the pump must be. The pressures amount to 100 to 1,000 bar and the gears are either straight-toothed, helical or arrow-toothed and generally made in one piece with the drive shaft or the driven shaft. The journals of both the drive shaft and the driven shaft are seated in plain bearings, which are typically product lubricated, which means that the journals run dry prior to conveying a product, so are not lubricated. Between the bearing journal and the bearing shell of the sliding bearing, there is a small annular gap through which the product is forced outwards from the pressure side of the pump during operation of the pump in the axial direction of the bearing journal and is returned to the suction side of the pump via deflection channels. This way will the annular gap between bearing pin and bearing shell filled with product, so that forms a lubrication gap.
Zur Förderung von Feststoffen sind derartige Zahnradpumpen hingegen nicht geeignet, da Feststoffe keinen Schmierfilm bilden können, der die Lagerzapfen trägt. Andererseits haben Zahnradpumpen aber für die Förderung von Produkten mit hohem Feststoffanteil andere Vorteile, die sich mit anderen Pumpen, beispielsweise Kolbenpumpen, nicht realisieren lassen. Dazu zählen zum einen der konstante Förderstrom, zum anderen hohen Drücke, die mit einer Zahnradpumpe erreichbar sind.By contrast, such gear pumps are not suitable for conveying solids since solids can not form a lubricating film which carries the bearing journals. On the other hand, gear pumps have other advantages for the promotion of products with high solids content, which can not be realized with other pumps, such as piston pumps. These include on the one hand the constant flow rate, on the other hand high pressures, which can be reached with a gear pump.
Es ist daher Aufgabe der Erfindung, eine Zahnradpumpe der eingangs genannten Art dahingehend weiterzubilden, dass mit ihr auch Produkten mit hohem Feststoffanteil gefördert werden können.It is therefore an object of the invention to develop a gear pump of the type mentioned in that with her products with high solids content can be promoted.
Zur Lösung dieser Aufgabe zeichnet sich die Zahnradpumpe der eingangs genannten Art dadurch aus, dass die Lagerzapfen der Zahnräder in Rollen gelagert sind, und dass zur Abdichtung des Gehäuses gegenüber den Gehäusedeckeln mit den Wälzlagern auf jedem Lagerzapfen ein Dichtring sitzt, der mit einer Seite an einer Flanke der Zahnräder anliegt und mit der gegenüberliegenden anderen Seite von einem Federelement dichtend gegen die Flanke der Zahnräder gedrückt wird.To solve this problem, the gear pump of the type mentioned is characterized in that the bearing pins of the gears are mounted in rollers, and that for sealing the housing relative to the housing covers with the rolling bearings on each journal a sealing ring sits with one side to a Flank of the gears rests and is pressed with the opposite other side of a spring element sealing against the flank of the gears.
Durch die Verwendung von Wälzlagern braucht der Produktstrom nicht zur Schmierung der Lagerzapfen herangezogen zu werden, was bei körnigen Feststoffen auch gar nicht möglich wäre. Allerdings erfordert eine in der erfindungsgemäßen Weise abgewandelte Zahnradpumpe eine zuverlässige Abdichtung der Wälzlager gegenüber dem Produktförderraum, da körnige Feststoffe nicht in die Wälzlager eintreten dürfen, um diese nicht zu zerstören. Hierzu dient der erfindungsgemäße Dichtring, der mit einer aufgeweiteten oder divergierenden Seitenfläche an jeweils einer Stirnfläche der Zahnräder anliegt und durch Federelemente in axialer Richtung gegen die erwähnten Stirnflächen gedrückt wird.By using rolling bearings, the product flow does not need to be used to lubricate the journals, which would not even be possible with granular solids. However, a gear pump modified in the manner according to the invention requires reliable sealing of the roller bearings in relation to the product conveying space, since granular solids must not enter the roller bearings so as not to destroy them. For this purpose, the sealing ring according to the invention, which serves with a widened or divergent Side surface bears against a respective end face of the gears and is pressed by spring elements in the axial direction against the mentioned end faces.
Die Erfindung wird nachfolgend anhand von Figuren näher erläutert; es zeigenThe invention will be explained in more detail with reference to figures; show it
Figur 1 einen Schnitt durch eine Zahnradpumpe;Figure 1 is a section through a gear pump;
Figur 2 eine perspektivische Darstellung eines erfindungsgemäßen Dichtrings, der bei der Zahnradpumpe nach Figur 1 zum Einsatz kommt;Figure 2 is a perspective view of a sealing ring according to the invention, which is used in the gear pump of Figure 1 is used;
Figur 3 ein Federelement in perspektivischer, montierter Darstellung, mit dem der Dichtring von Figur 2 an die Zahnradflanke angepresst wird; undFigure 3 is a spring element in perspective, assembled representation, with which the sealing ring of Figure 2 is pressed against the toothed wheel flank; and
Figur 4 eine auseinandergezogene Darstellung des Federelements von Figur 3.FIG. 4 is an exploded view of the spring element of FIG. 3.
Figur 1 zeigt einen Vertikalschnitt durch eine Zahnradpumpe mit zwei miteinander kämmenden Zahnrädern 2, 2', die in einem Gehäuse 1 untergebracht sind. Nicht erkennbar sind dabei der Einlass und der Auslass der Zahnradpumpe, da sie in der Mittelebene vor bzw. hinter der Schnittebene liegen. Die Zahnradpumpe ist symmetrisch aufgebaut, so dass es ausreicht, nur den oberen Teil zu beschreiben. Ferner hat die Zahnradpumpe natürlich auch eine Antriebswelle, eine getriebene Welle oder zwei Antriebswellen, was aber aus Gründen der Übersichtlichkeit nicht dargestellt ist.Figure 1 shows a vertical section through a gear pump with two meshing gears 2, 2 ', which are housed in a housing 1. Not recognizable are the inlet and the outlet of the gear pump, since they lie in the median plane in front of or behind the cutting plane. The gear pump is symmetrical, so that it is sufficient to describe only the upper part. Furthermore, the gear pump of course also has a drive shaft, a driven shaft or two drive shafts, which is not shown for reasons of clarity.
Das obere Zahnrad 2 ist einstückig mit Lagerzapfen 9 verbunden, die in Wälzlagern 4, 41 gelagert sind. Die Wälzlager 4, 4' sitzen in je einem Gehäusedeckel 3, der seitlich an das Gehäuse 1 angeflanscht ist. Jeder Gehäusedeckel 3 trägt somit zwei Wälzlager 4, 4', die durch eine Trennwand 10 voneinander beabstandet sind. Zwischen den Wälzlagern 4, 4' und den Flanken der Zahnräder 2, 21 sind Dichtringe 5, 5' angeordnet, die die Flanken der Zahnräder 2, 2' kontaktieren und damit die Wälzlager 4, 4' gegenüber dem Gehäuse 1 abdichten. Jeder Dichtring 5 hat ein sich im Durchmesser erweiterndes Außenende, mit dem er die Flanken der Zahnräder 2, 2' in einem Bereich kontaktiert, der auf besondere Weise bearbeitet worden ist, um die Dichtwirkung auch noch nach langer Gebrauchsdauer aufrecht zu erhalten. Eine Art der besondere Bearbeitung besteht darin, eine Schweißnaht durch Auftragsschweißen aufzubringen und anschließend abzuschleifen, um die Härte der Oberfläche zu verbessern. Man nennt dieses Verfahren "Stellitieren".The upper gear 2 is integrally connected to bearing journals 9, which are mounted in bearings 4, 4 1 . The rolling bearings 4, 4 'sit in a respective housing cover 3, which is laterally flanged to the housing 1. Each housing cover 3 thus contributes two rolling bearings 4, 4 ', which are spaced from each other by a partition 10. Between the rolling bearings 4, 4 'and the flanks of the gears 2, 2 1 sealing rings 5, 5' are arranged, which contact the flanks of the gears 2, 2 'and thus the rolling bearings 4, 4' with respect to the housing 1 seal. Each sealing ring 5 has a diameter-expanding outer end, with which it contacts the flanks of the gears 2, 2 'in a region which has been processed in a special way in order to maintain the sealing effect even after a long service life. One type of special processing is to apply a weld by build-up welding and then abrade to improve the hardness of the surface. This process is called "stelliting".
Das gegenüberliegende Innenende des Dichtrings 5 kontaktiert ein Federelement 7, das sich an dem Wälzlager 4 abstützt und damit den Dichtring 5 gegen die Flanken der Zahnräder 2, 21 drückt.The opposite inner end of the sealing ring 5 contacts a spring element 7, which is supported on the roller bearing 4 and thus the sealing ring 5 presses against the flanks of the gears 2, 2 1 .
Zur zusätzlichen Abdichtung ist ein O-Ring 6 in jeweils eine Nut der Gehäusedeckel 3 eingelegt und dichtet damit den Außenumfang 51 des Dichtrings 5 ab.For additional sealing an O-ring 6 is inserted in each case a groove of the housing cover 3 and thus seals the outer periphery 51 of the sealing ring 5 from.
Figur 2 zeigt den Dichtring 5 in perspektivischer Darstellung, wobei man an der linken Seite das sich erweiternde Außenende erkennt, während an der rechten Innenseite drei Ausnehmungen 50 für den Eingriff von Stiften 40 vorgesehen sind, die ein Verdrehen des Dichtrings 5 im Betrieb verhindern. Auf einem Außenumfang 51 des Dichtrings 5 sitzt im Betrieb der O-Ring 6, während die Innenfläche 52 des Dichtrings 5 im Betrieb im Abstand zum Lagerzapfen 9, 9' angeordnet ist.Figure 2 shows the sealing ring 5 in a perspective view, which recognizes the widening outer end on the left side, while three recesses 50 are provided for the engagement of pins 40 on the right inner side, which prevent rotation of the sealing ring 5 during operation. In operation, the O-ring 6 is seated on an outer circumference 51 of the sealing ring 5, while the inner surface 52 of the sealing ring 5 is arranged at a distance from the bearing journal 9, 9 'during operation.
In Figur 3 ist das Federelement 7 im montierten Zustand perspektivisch dargestellt, während es in Figur 4 in auseinander- gezogener Darstellung wiedergegeben ist. Man erkennt einen Käfig 10, der im Querschnitt die Form eines liegenden U hat, wobei eine Seite, die im Betrieb dem Wälzlager 4, 41 zugewendet wird, geschlossen ist. Durch den oberen und unteren Schenkel des Käfigs 10 verlaufen radiale Bohrungen 41, die zur Aufnahme der Stifte 40 dienen.In FIG. 3, the spring element 7 is shown in perspective in the assembled state, while in FIG. drawn representation is reproduced. It can be seen a cage 10, which has the shape of a horizontal U in cross-section, with one side, which is the operation of the rolling bearing 4, 4 1 is closed, is closed. Through the upper and lower legs of the cage 10 extend radial bores 41, which serve to receive the pins 40.
Hinter die Stifte 40 werden eine Federscheibe 20 und ein Kraftübertragungsring 30 eingelegt, wodurch das Federelement 7 den Dichtring 5 in axialer Richtung der Lagerzapfen 9, 9' gegen die Flanken der Zahnräder 2, 2' drücken kann. Dadurch liegt die Federscheibe 20 zwischen dem Kraftübertragungsring 30 und dem geschlossenen Ende des Käfigs 10.Behind the pins 40, a spring washer 20 and a power transmission ring 30 are inserted, whereby the spring element 7, the sealing ring 5 in the axial direction of the bearing pin 9, 9 'can press against the flanks of the gears 2, 2'. As a result, the spring washer 20 is located between the power transmission ring 30 and the closed end of the cage 10.
Im montierten Zustand gemäß Figur 1 halten die Wälzlager 4, 4 ' , die auf übliche Weise in den Gehäusedeckeln 3 fixiert sind, beispielsweise indem die Innenringe der Wälzlager 4, 4' auf den Lagerzapfen 9 durch Seeger-Ringe gegen axiales Verschieben gesichert sind, das Federelement 7 gegen eine axiale Verlagerung fest. In the assembled state according to FIG. 1, the roller bearings 4, 4 ', which are fixed in the usual way in the housing covers 3, for example by the inner rings of the rolling bearings 4, 4' are secured to the bearing pin 9 by Seeger rings against axial displacement, the Spring element 7 against an axial displacement firmly.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200610034141 DE102006034141A1 (en) | 2006-07-24 | 2006-07-24 | Gear pump for conveying products with high solids content |
| DE102006034141.4 | 2006-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008012060A1 true WO2008012060A1 (en) | 2008-01-31 |
Family
ID=38521598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/006556 Ceased WO2008012060A1 (en) | 2006-07-24 | 2007-07-24 | Geared pump for feeding products with high solid content |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102006034141A1 (en) |
| WO (1) | WO2008012060A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023105504A1 (en) * | 2023-03-07 | 2024-09-12 | Eberspächer Climate Control Systems GmbH | Gear pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392798A (en) * | 1981-04-03 | 1983-07-12 | General Signal Corporation | Gear pump or motor with low pressure bearing lubrication |
| US4439120A (en) * | 1980-10-27 | 1984-03-27 | Skega Ab | Meshing cog-wheel injection unit with lateral sealing and scropers |
| JP2000320471A (en) * | 1999-05-14 | 2000-11-21 | Hitachi Ltd | Gear type fuel pump |
| US6183231B1 (en) * | 1997-01-31 | 2001-02-06 | United Dominion Industries, Inc. | Clean-in-place gear pump |
-
2006
- 2006-07-24 DE DE200610034141 patent/DE102006034141A1/en not_active Withdrawn
-
2007
- 2007-07-24 WO PCT/EP2007/006556 patent/WO2008012060A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4439120A (en) * | 1980-10-27 | 1984-03-27 | Skega Ab | Meshing cog-wheel injection unit with lateral sealing and scropers |
| US4392798A (en) * | 1981-04-03 | 1983-07-12 | General Signal Corporation | Gear pump or motor with low pressure bearing lubrication |
| US6183231B1 (en) * | 1997-01-31 | 2001-02-06 | United Dominion Industries, Inc. | Clean-in-place gear pump |
| JP2000320471A (en) * | 1999-05-14 | 2000-11-21 | Hitachi Ltd | Gear type fuel pump |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006034141A1 (en) | 2008-01-31 |
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