WO2007033742A1 - Axial piston engine - Google Patents
Axial piston engine Download PDFInfo
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- WO2007033742A1 WO2007033742A1 PCT/EP2006/008253 EP2006008253W WO2007033742A1 WO 2007033742 A1 WO2007033742 A1 WO 2007033742A1 EP 2006008253 W EP2006008253 W EP 2006008253W WO 2007033742 A1 WO2007033742 A1 WO 2007033742A1
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- WIPO (PCT)
- Prior art keywords
- axial piston
- piston machine
- machine according
- suction
- cylinder
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
- F04B1/24—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0035—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
- F01B3/0038—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to main shaft axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
- F01B3/0064—Machine housing
Definitions
- the invention relates to an axial piston machine according to the preamble of patent claim 1 and a method for producing such an axial piston machine.
- the axial piston machine is known for example from WO 03/058034 Al.
- the axial piston machine has a multi-part housing for defining an interior space on which a suction port and a pressure port are formed.
- pistons are arranged on a drive shaft, which are guided in invisible cylindrical spaces of two cylindrical drums, which are supported on a respective swash plate.
- the cylinder chambers communicate via a suction channel integrated in the housing and a pressure channel with the suction connection or the pressure connection.
- a disadvantage of this known solution is that pulsations of the pressure medium guided in the channels lead to vibrations of the housing and thus to disturbing noises. Furthermore, such a housing is massive, since the suction and the pressure channel are cast into the housing, resulting in high production costs.
- Object of the present invention is to provide an axial piston machine, which shows a reduced noise during operation and manufacturing technology is easy and fast to manufacture, and a method for producing such an axial piston machine.
- This object is achieved by an axial piston machine having the features of patent claim 1 by a method according to patent claim 9.
- the axial piston machine has a multi-part housing for limiting an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported.
- pistons are guided, which are in operative connection with a drive shaft, wherein the axes of rotation of the cylinder drums are employed to the axis of rotation of the piston.
- the housing has a suction and a pressure connection, which are connected via a suction channel and a pressure channel with cylinder chambers of the cylinder drums.
- a section of the suction or pressure channel is formed in each case by a tube inserted into the interior.
- the housing has two covers and a central part which is arranged between the covers.
- the connection of the lid with the central part is preferably carried out via clamping elements which are arranged outside of the interior or of the middle part.
- the tubes are axially parallel to the axis of rotation of the drive shaft and are also clamped on the clamping elements between the lids.
- U-shaped channel sections may be formed in the covers.
- both the suction port and the pressure port are formed in one of the lid and each open into one of the channel sections.
- the middle part preferably has an approximately tubular section with two diametrically arranged arcuate extensions for gripping the tubes.
- Axial piston machine in particular of the central part, preferably a pipe is turned to its axial nominal length. Subsequently, the annular grooves are introduced into the contact surfaces and the tube deformed such that form the diametrically arranged extensions. Then the contact surfaces are reworked and the sealing rings used.
- FIG. 1 shows a longitudinal section through an embodiment of an axial piston machine according to the invention
- Figure 2 is a detail of the embodiment of Figure 1 and
- FIG. 3 shows a cross section of the embodiment of Figure 1. - -
- Figure 1 shows a longitudinal section through an axial piston machine 2 according to the invention, which can be operated both as a hydraulic motor and as a hydraulic pump.
- the axial piston machine 2 will be described by way of example as a hydraulic pump.
- the axial piston machine 2 has a housing 4, on which a suction port 6 and a pressure port 8 are formed, each opening into a suction or pressure channel 26, 28 according to the invention.
- the housing 4 is formed in several parts with two lids 104, 106, between which a sleeve-like central portion 108 for limiting the interior 10 and at least two tubes 134, 136 of the Saugtial Pressure channels 26, 28 are clamped.
- the housing 4 defines an interior 10 in which a drive shaft 12 is located. This is about a roller bearing 30 which is inserted into an inner bore 32 of the lid 106, and mounted by a rolling bearing 31 which is located in a blind bore 33 of the lid 104, two times in the housing 4.
- the inner bore 32 is sealed by a sealing ring 34 against oil leakage.
- a projecting from the housing 4 free end portion of the drive shaft 12 is connectable to a drive motor, not shown.
- swash plates 14, 16 In the interior 10 are fixed two swash plates 14, 16, each with an obliquely to the axis of the drive shaft 12 extending support surface 36, 38 is arranged, on each of which a mounted on the drive shaft 12 cylinder drum 18, 20 is supported. These have each, as will be explained in more detail in Figure 2, a plurality of cylinder sleeves 40, 42, in each of which a piston 22, 24 is immersed.
- the swash plates 14, 16 are arranged symmetrically to the vertical plane in Figure 1 center plane M.
- a piston 22 and a piston 24 are each formed as end portions of a double piston 44, which is non-rotatably inserted in a radially projecting drive flange 46 of the drive shaft 12.
- Each cylinder drum 18, 20 is mounted oscillatingly on the drive shaft 12 and taken by the latter via a driver 52 acting on a hub part 58 in the direction of rotation.
- a cylinder drum with a flange 54 is supported at the respective support surface of a swash plate.
- Each cylinder drum 18, 20 is biased against the support surface 36, 38 of a swashplate via a tension spring 60 disposed between a support ring 62 pivotable on the drive shaft 12 and a circlip 66 received in an inner circumferential groove 64 of the flange portion 54.
- the evenly distributed over the circumference of the cylinder sleeves 40, 42 of the cylinder drum 18, 20 are supported.
- the cylinder sleeves are each supported on the foot side via a support ring surface 70 on the annular end face 68, wherein a relief groove 72 is located in the support ring surface 70.
- the cylinder sleeves 40, 42 each have a cylinder bore 80, in which a piston 22, 24 is immersed and the foot side is radially stepped back, so that a radially inwardly extending shoulder 82 is formed.
- the axial securing of the cylinder sleeves 42 takes place in each case by means of a threaded insert 84, which is screwed into an internally threaded bore 86 of the flange part 54 and extends with a radially expanded flange 88 over the shoulder 82 out into the cylinder bore 80.
- the threaded insert 84 has a bore 90 which is hydraulically connected to an aperture 92 of the flange portion 54 so that pressure fluid can flow from the cylinder space defined by the cylinder sleeve and the piston to the swash plate and in the reverse direction.
- this control elements 94, 96, 98, 100 are formed (see Figure 1), which form part of the suction channel 26 and pressure channel 28 of the invention and on the function of the rotational position (inner, outer dead center) of the cylinder drums 18, 20th a connection with the suction or the pressure port 6, 8 is made to lead pressure medium to the cylinder chamber or to direct high pressure pressurized fluid to a consumer.
- the pistons 22, 24 are designed approximately conical, with their diameter from a waist 101 (see Figure 2) starting to expand conically acting as a seal between the piston and cylinder sleeve ball element.
- the lids 104, 106 are substantially plate-like, with the suction connection 6 and the pressure connection 8 being formed in the right-hand cover 106 in FIG. 1, in which the bearing arrangement 30 for supporting the drive shaft 12 is arranged. each in one of the channel sections 138, 142 open. This has the advantage that the left in accordance with the view in Figure 1 cover 104 is formed axially shortened and the construction volume of the axial piston machine 2 is reduced in the axial direction.
- the middle part 108 has two frontal contact surfaces 110, 112 with which it abuts on opposite end surfaces 111, 113 of the cover 104, 106, whereby the inner space 10 is limited in the axial and radial directions.
- the center part 108 has two sealing rings 118, 120 which are inserted into an annular groove 114, 116 of the contact surface 110, 112 and bear sealingly against the end faces 111, 113.
- the middle part 108 has, according to FIG. 3, an approximately tubular or annular cross-section which is suitable for receiving tubes 134, 136 according to the invention of the suction or the like.
- Pressure channel 26, 28 two diametrically arranged arcuate extensions 130, 132 for engaging around the tubes 134, 136 has.
- a tube is preferably turned to its axial nominal length, and the annular grooves 114, 116 are introduced into the contact surfaces 110, 112. Subsequently, the tube is deformed accordingly, so that the diametrically arranged extensions 130, 132 form. Then, the contact surfaces 110, 112 are reworked and the sealing rings 118, 120 used.
- the tubes 134, 136 extend according to Figure 1 axially parallel to the axis of rotation of the drive shaft 12 and are preferably made of steel or a high pressure resistant plastic. They are received in the interior space 10 and radially spaced from an inner peripheral wall of the central portion 108, so that vibrations introduced thereto, for example due to pulsation in the pressure medium, are not transmitted to the housing 4 and thus quiet operation the axial piston machine 2 according to the invention is possible.
- the tubes 134; 136 are clamped between the cover 104, 106 and dive end into a stepped extension of the channel sections 138, 140, 142, 144 a.
- a sealing ring 162, 164, 166, 168 is inserted into each radial extension, which surrounds the tubes 134, 136 in the region of their end sections.
- the axial height of the sealing rings 162, 164, 166, 168 corresponds to the axial depth of the extensions, so that the sealing rings 162, 164, 166, 168 are flush with the end faces 111, 113.
- an axial piston machine with a multi-part housing for defining an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported, and with a suction and a pressure port, which is connected via a suction or pressure channel with cylinder chambers of the cylinder drum are, wherein a portion of the suction or pressure channel is formed in each case by a tube inserted into the interior, and a method for producing such an axial piston machine.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Beschreibung Axialkolbenmaschine Description axial piston machine
Die Erfindung betrifft eine Axialkolbenmaschine gemäß dem Oberbegriff des Patentanspruchs 1 und ein Verfahren zur Herstellung einer derartigen Axialkolbenmaschine.The invention relates to an axial piston machine according to the preamble of patent claim 1 and a method for producing such an axial piston machine.
Eine derartige Axialkolbenmaschine ist beispielsweise aus der WO 03/058034 Al bekannt. Gemäß der anliegenden Figur 4, auf die jetzt schon Bezug genommen wird, hat die Axialkolbenmaschine ein mehrteiliges Gehäuse zum Begrenzen eines Innenraums, an dem ein Sauganschlussund ein Druckanschluss ausgebildet sind. In dem Innenraum sind an einer Antriebswelle Kolben angeordnet, die in nicht sichtbaren Zylinderräumen von zwei Zylindertrommeln geführt sind, die sich auf jeweils einer Schrägscheibe abstützen. Die Zylinderräume stehen über einen in das Gehäuse integrierten Saugkanal und einen Druckkanal mit dem Sauganschluss bzw. dem Druckanschluss in Verbindung.Such axial piston machine is known for example from WO 03/058034 Al. Referring to the attached Figure 4, to which reference is already made, the axial piston machine has a multi-part housing for defining an interior space on which a suction port and a pressure port are formed. In the interior, pistons are arranged on a drive shaft, which are guided in invisible cylindrical spaces of two cylindrical drums, which are supported on a respective swash plate. The cylinder chambers communicate via a suction channel integrated in the housing and a pressure channel with the suction connection or the pressure connection.
Nachteilig an dieser bekannten Lösung ist, dass Pulsationen des in den Kanälen geführten Druckmittels zu Schwingungen des Gehäuses und somit zu störenden Geräuschen führen. Weiterhin ist ein derartiges Gehäuse massiv auszuführen, da der Saug- und der Druckkanal in das Gehäuse eingegossen sind, wodurch hohe Herstellungskosten anfallen.A disadvantage of this known solution is that pulsations of the pressure medium guided in the channels lead to vibrations of the housing and thus to disturbing noises. Furthermore, such a housing is massive, since the suction and the pressure channel are cast into the housing, resulting in high production costs.
Aufgabe der vorliegenden Erfindung ist es, eine Axialkolbenmaschine zu schaffen, die im Betrieb eine reduzierte Geräuschentwicklung zeigt und fertigungstechnisch einfach und schnell herzustellen ist, sowie ein Verfahren zur Herstellung einer derartigen Axialkolbenmaschine . Diese Aufgabe wird gelöst durch eine Axialkolbenmaschine mit den Merkmalen des Patentanspruchs 1 durch ein Verfahren nach Patentanspruch 9.Object of the present invention is to provide an axial piston machine, which shows a reduced noise during operation and manufacturing technology is easy and fast to manufacture, and a method for producing such an axial piston machine. This object is achieved by an axial piston machine having the features of patent claim 1 by a method according to patent claim 9.
Die erfindungsgemäße Axialkolbenmaschine hat ein mehrteiliges Gehäuse zum Begrenzen eines Innenraums , in dem zwei Schrägscheiben aufgenommen sind, an der jeweils eine Zylindertrommel abgestützt ist. In den Zylindertrommeln sind Kolben geführt, die mit einer Antriebswelle in Wirkverbindung stehen, wobei die Drehachsen der Zylindertrommeln zur Drehachse der Kolben angestellt sind. Des Weiteren hat das Gehäuse einen Saug- und einen Druckan- schluss, die über einen Saugkanal und einen Druckkanal mit Zylinderräumen der Zylindertrommeln verbunden sind. Erfindungsgemäß wird ein Abschnitt des Saug- bzw. Druckkanals jeweils durch ein in den Innenraum eingesetztes Rohr ausgebildet. Durch die Rohre ist der Saug- bzw. Druckkanal von dem Gehäuse abschnittsweise entkoppelt und somit werden Schwingungen, die zum Beispiel aufgrund von Pulsationen in dem Saug- bzw. Druckkanal entstehen, nicht oder zumindest stark verringert als Geräusche in das Gehäuse eingeleitet.The axial piston machine according to the invention has a multi-part housing for limiting an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported. In the cylinder drums pistons are guided, which are in operative connection with a drive shaft, wherein the axes of rotation of the cylinder drums are employed to the axis of rotation of the piston. Furthermore, the housing has a suction and a pressure connection, which are connected via a suction channel and a pressure channel with cylinder chambers of the cylinder drums. According to the invention, a section of the suction or pressure channel is formed in each case by a tube inserted into the interior. Through the tubes of the suction or pressure channel of the housing is partially decoupled and thus vibrations that arise, for example, due to pulsations in the suction or pressure channel, not or at least greatly reduced as noise introduced into the housing.
Bei einer Ausführungsform weist das Gehäuse zwei Deckel und ein Mittelteil auf, der zwischen den Deckeln angeordnet ist. Die Verbindung der Deckel mit dem Mittelteil erfolgt bevorzugterweise über Spannelemente, die außerhalb des Innenraums bzw. des Mittelteils angeordnet sind.In one embodiment, the housing has two covers and a central part which is arranged between the covers. The connection of the lid with the central part is preferably carried out via clamping elements which are arranged outside of the interior or of the middle part.
Bei einer bevorzugten Ausführungsform verlaufen die Rohre achsparallel zur Drehachse der Antriebswelle und sind ebenfalls über die Spannelemente zwischen den Deckeln eingespannt . Zur Verbindung der Rohre mit den Zylinderräumen können in den Deckeln U-förmige Kanalabschnitte ausgebildet sein.In a preferred embodiment, the tubes are axially parallel to the axis of rotation of the drive shaft and are also clamped on the clamping elements between the lids. For connecting the tubes to the cylinder chambers, U-shaped channel sections may be formed in the covers.
Bevorzugterweise sind sowohl der Sauganschluss als auch der Druckanschluss in einem der Deckel ausgebildet und münden jeweils in einen der Kanalabschnitte.Preferably, both the suction port and the pressure port are formed in one of the lid and each open into one of the channel sections.
Das Mittelteil hat bevorzugterweise einen etwa rohrfönnigen Querschnitt mit zwei diametral angeordneten bogenförmigen Erweiterungen zum Umgreifen der Rohre.The middle part preferably has an approximately tubular section with two diametrically arranged arcuate extensions for gripping the tubes.
■ Zur Herstellung der erfindungsgemäßen ■ For the preparation of the inventive
Axialkolbenmaschine, insbesondere des Mittelteils, wird vorzugsweise ein Rohr auf seine axiale Soll-Länge plangedreht. Anschließend werden in die Kontaktflächen die Ringnuten eingebracht und das Rohr derart verformt, dass sich die diametral angeordneten Erweiterungen ausbilden. Dann werden die Kontaktflächen nachbearbeitet und die Dichtungsringe eingesetzt.Axial piston machine, in particular of the central part, preferably a pipe is turned to its axial nominal length. Subsequently, the annular grooves are introduced into the contact surfaces and the tube deformed such that form the diametrically arranged extensions. Then the contact surfaces are reworked and the sealing rings used.
Sonstige vorteilhafte Weiterbildungen der Erfindung sind Gegenstand weiterer Unteransprüche.Other advantageous developments of the invention are the subject of further subclaims.
Im Folgenden wird eine bevorzugte Ausführungsform der Erfindung anhand schematischer Zeichnungen näher erläutert. Es zeigen:In the following, a preferred embodiment of the invention is explained in more detail with reference to schematic drawings. Show it:
Figur 1 einen Längsschnitt durch eine Ausführungsform einer erfindungsgemäßen Axialkolbenmaschine,1 shows a longitudinal section through an embodiment of an axial piston machine according to the invention,
Figur 2 eine Detaildarstellung der Ausführungsform aus Figur 1 undFigure 2 is a detail of the embodiment of Figure 1 and
Figur 3 einen Querschnitt der Ausführungsform aus Figur 1. - -3 shows a cross section of the embodiment of Figure 1. - -
Figur 1 zeigt einen Längsschnitt durch eine erfindungsgemäße Axialkolbenmaschine 2, die sowohl als Hydraulikmotor als auch als Hydraulikpumpe betrieben werden kann. Im Folgenden wird die Axialkolbenmaschine 2 beispielhaft als Hydraulikpumpe beschrieben.Figure 1 shows a longitudinal section through an axial piston machine 2 according to the invention, which can be operated both as a hydraulic motor and as a hydraulic pump. In the following, the axial piston machine 2 will be described by way of example as a hydraulic pump.
Die Axialkolbenmaschine 2 hat ein Gehäuse 4 , an dem ein Sauganschluss 6 und ein Druckanschluss 8 ausgebildet sind, die jeweils in einen erfindungsgemäßen Saug- bzw. Druckkanal 26, 28 münden. Das Gehäuse 4 ist mehrteilig mit zwei Deckeln 104, 106 ausgebildet, zwischen denen ein hülsenartiges Mittelteil 108 zur Begrenzung des Innenraums 10 und zumindest zwei Rohre 134, 136 des Saugbzw. Druckkanals 26, 28 eingespannt sind. Das Gehäuse 4 begrenzt einen Innenraum 10, in dem sich eine Antriebswelle 12 befindet. Diese ist über ein Wälzlager 30, das in eine Innenbohrung 32 des Deckels 106 eingesetzt ist, und durch ein Wälzlager 31, das sich in einer Sackbohrung 33 des Deckels 104 befindet, zweifach in dem Gehäuse 4 gelagert. Die Innenbohrung 32 ist durch einen Dichtring 34 gegen Ölaustritt abgedichtet. Ein aus dem Gehäuse 4 vorstehender freier Endabschnitt der Antriebswelle 12 ist mit einem nicht dargestellten Antriebsmotor verbindbar.The axial piston machine 2 has a housing 4, on which a suction port 6 and a pressure port 8 are formed, each opening into a suction or pressure channel 26, 28 according to the invention. The housing 4 is formed in several parts with two lids 104, 106, between which a sleeve-like central portion 108 for limiting the interior 10 and at least two tubes 134, 136 of the Saugbzw. Pressure channels 26, 28 are clamped. The housing 4 defines an interior 10 in which a drive shaft 12 is located. This is about a roller bearing 30 which is inserted into an inner bore 32 of the lid 106, and mounted by a rolling bearing 31 which is located in a blind bore 33 of the lid 104, two times in the housing 4. The inner bore 32 is sealed by a sealing ring 34 against oil leakage. A projecting from the housing 4 free end portion of the drive shaft 12 is connectable to a drive motor, not shown.
In dem Innenraum 10 sind fest zwei Schrägscheiben 14, 16 mit jeweils einer schräg zur Achse der Antriebswelle 12 verlaufenden Stützfläche 36, 38 angeordnet, an der jeweils eine auf der Antriebswelle 12 gelagerte Zylindertrommel 18, 20 abgestützt ist. Diese haben jeweils, wie unter Figur 2 noch näher erläutert wird, eine Vielzahl von Zylinderhülsen 40, 42, in die jeweils ein Kolben 22, 24 eintaucht. Gemäß Figur 1 sind die Schrägscheiben 14, 16 symmetrisch zur in Figur 1 vertikal verlaufenden Mittelebene M angeordnet. Ein Kolben 22 und ein Kolben 24 sind jeweils als Endabschnitte eines Doppelkolbens 44 gebildet, der drehfest in einem radial vorspringenden Antriebsflansch 46 der Antriebswelle 12 eingesetzt ist. Die Lagerung der Zylindertrommel 18, 20 erfolgt über Pendellager 48, 50, die eine aufgrund der Schrägstellung der Zylindertrommel 18, 20 während einer Rotation der Antriebswelle 12 auftretende Taumelbewegung ermöglichen. Weitere Einzelheiten der Anordnung werden anhand der Detaildarstellung der Zylindertrommel 20 in Figur 2 erläutert.In the interior 10 are fixed two swash plates 14, 16, each with an obliquely to the axis of the drive shaft 12 extending support surface 36, 38 is arranged, on each of which a mounted on the drive shaft 12 cylinder drum 18, 20 is supported. These have each, as will be explained in more detail in Figure 2, a plurality of cylinder sleeves 40, 42, in each of which a piston 22, 24 is immersed. According to Figure 1, the swash plates 14, 16 are arranged symmetrically to the vertical plane in Figure 1 center plane M. A piston 22 and a piston 24 are each formed as end portions of a double piston 44, which is non-rotatably inserted in a radially projecting drive flange 46 of the drive shaft 12. The storage of the cylinder drum 18, 20 via pendulum bearings 48, 50, which allow a occurring due to the inclination of the cylinder drum 18, 20 during rotation of the drive shaft 12 tumbling motion. Further details of the arrangement will be explained with reference to the detailed illustration of the cylinder drum 20 in FIG.
Jede Zylindertrommel 18, 20 ist pendelnd an der Antriebswelle 12 gelagert und von dieser über einen an einem Nabenteil 58 angreifenden Mitnehmer 52 in Drehrichtung mitgenommen. An der jeweiligen Stützfläche einer Schrägscheibe ist eine Zylindertrommel mit einem Flanschteil 54 abgestützt. Jede Zylindertrommel 18, 20 ist über eine Spannfeder 60, die zwischen einem auf der Antriebswelle 12 verschwenkbaren Stützring 62 und einem in einer inneren Umfangsnut 64 des Flanschteils 54 aufgenommenen Sicherungsring 66 angeordnet ist, gegen die Stützfläche 36, 38 einer Schrägscheibe vorgespannt.Each cylinder drum 18, 20 is mounted oscillatingly on the drive shaft 12 and taken by the latter via a driver 52 acting on a hub part 58 in the direction of rotation. At the respective support surface of a swash plate, a cylinder drum with a flange 54 is supported. Each cylinder drum 18, 20 is biased against the support surface 36, 38 of a swashplate via a tension spring 60 disposed between a support ring 62 pivotable on the drive shaft 12 and a circlip 66 received in an inner circumferential groove 64 of the flange portion 54.
An einer von der Stützfläche 36, 38 abgewandten Ringstirnfläche 68 des Flanschteils 54 sind die gleichmäßig über den Umfang verteilten Zylinderhülsen 40, 42 der Zylindertrommel 18, 20 abgestützt. Die Zylinderhülsen stützen sich jeweils fußseitig über eine Stutzringfläche 70 auf der Ringstirnfläche 68 ab, wobei sich in der Stützringfläche 70 eine Entlastungsnut 72 befindet. Die Zylinderhülse 40, 42 haben jeweils eine Zylinderbohrung 80, in die ein Kolben 22, 24 eintaucht und die fußseitig radial zurückgestuft ist, so dass eine sich radial nach innen erstreckende Schulter 82 gebildet ist. Die axiale Sicherung der Zylinderhülsen 42 erfolgt jeweils mittels eines Gewindeeinsatzes 84, der in eine Innengewindebohrung 86 des Flanschteils 54 eingeschraubt ist und sich mit einem radial erweiterten Flansch 88 über die Schulter 82 hinaus in die Zylinderbohrung 80 erstreckt .At one of the support surface 36, 38 facing away from the annular end face 68 of the flange 54, the evenly distributed over the circumference of the cylinder sleeves 40, 42 of the cylinder drum 18, 20 are supported. The cylinder sleeves are each supported on the foot side via a support ring surface 70 on the annular end face 68, wherein a relief groove 72 is located in the support ring surface 70. The cylinder sleeves 40, 42 each have a cylinder bore 80, in which a piston 22, 24 is immersed and the foot side is radially stepped back, so that a radially inwardly extending shoulder 82 is formed. The axial securing of the cylinder sleeves 42 takes place in each case by means of a threaded insert 84, which is screwed into an internally threaded bore 86 of the flange part 54 and extends with a radially expanded flange 88 over the shoulder 82 out into the cylinder bore 80.
Der Gewindeeinsatz 84 hat eine Bohrung 90, die hydraulisch mit einem Durchbruch 92 des Flanschteils 54 verbunden ist, so dass Druckmittel von dem von der Zylinderhülse und dem Kolben begrenzten Zylinderraum zur Schrägscheibe und in umgekehrter Richtung strömen kann. In dieser sind Steuernieren 94, 96, 98, 100 (vgl. Figur 1) ausgebildet, die einen Teil des erfindungsgemäßen Saugkanals 26 bzw. Druckkanals 28 bilden und über die in Abhängigkeit von der Drehposition (innerer, äußerer Totpunkt) der Zylindertrommeln 18, 20 eine Verbindung mit dem Saug- oder dem Druckanschluss 6, 8 hergestellt wird, um Druckmittel zum Zylinderraum zu führen oder mit Hochdruck beaufschlagtes Druckmittel zu einem Verbraucher zu leiten.The threaded insert 84 has a bore 90 which is hydraulically connected to an aperture 92 of the flange portion 54 so that pressure fluid can flow from the cylinder space defined by the cylinder sleeve and the piston to the swash plate and in the reverse direction. In this control elements 94, 96, 98, 100 are formed (see Figure 1), which form part of the suction channel 26 and pressure channel 28 of the invention and on the function of the rotational position (inner, outer dead center) of the cylinder drums 18, 20th a connection with the suction or the pressure port 6, 8 is made to lead pressure medium to the cylinder chamber or to direct high pressure pressurized fluid to a consumer.
Die Kolben 22, 24 sind etwa kegelförmig ausgeführt, wobei sich ihre Durchmesser von einer Taille 101 (siehe Figur 2) ausgehend zu einem als Dichtung zwischen Kolben und Zylinderhülse wirkenden Kugelelement konisch erweitern.The pistons 22, 24 are designed approximately conical, with their diameter from a waist 101 (see Figure 2) starting to expand conically acting as a seal between the piston and cylinder sleeve ball element.
In den Deckeln 104, 106 des Gehäuses 4 -sind jeweils zwei U-förmige Kanalabschnitte 138, 140, 142, 144, ausgebildet, die einen Teil des erfindungsgemäßen Saug¬ bzw. Druckkanals 26, 28 bilden und eine Verbindung zwischen den saugseitigen Steuernieren 94, 96 bzw. den druckseitigen Steuernieren 98, 100 der Schrägscheiben 14, 16 und dem jeweiligen Rohr 134, 136 herstellen, so dass - -In the covers 104, 106 of the housing 4 140 -are respectively two U-shaped channel sections 138, 142, 144 are formed, which form a part of the suction invention ¬ or pressure duct 26 28, and a connection between the suction-side kidney-shaped control 94, 96 and the pressure-side control kidney 98, 100 of the swash plates 14, 16 and the respective tube 134, 136 produce, so that - -
die jeweiligen Saug- und Druckseiten der Zylindertrommeln 18, 20 hydraulisch miteinander in Verbindung stehen.the respective suction and pressure sides of the cylinder drums 18, 20 are hydraulically connected with each other.
Die Deckel 104, 106 sind im Wesentlichen plattenartig ausgebildet, wobei in dem gemäß der Ansicht in der Figur 1 rechten Deckel 106, in. dem die Lageranordnung 30 zur Lagerung der .Antriebswelle 12 angeordnet ist, der Sauganschluss 6 und der Druckanschluss 8 ausgebildet sind, die jeweils in einen der Kanalabschnitte 138, 142 münden. Dies hat den Vorteil, dass der gemäß der Ansicht in der Figur 1 linke Deckel 104 axial verkürzt ausgebildet ist und das Bauvolumen der Axialkolbenmaschine 2 in axialer Richtung reduziert ist.The lids 104, 106 are substantially plate-like, with the suction connection 6 and the pressure connection 8 being formed in the right-hand cover 106 in FIG. 1, in which the bearing arrangement 30 for supporting the drive shaft 12 is arranged. each in one of the channel sections 138, 142 open. This has the advantage that the left in accordance with the view in Figure 1 cover 104 is formed axially shortened and the construction volume of the axial piston machine 2 is reduced in the axial direction.
Das Mittelteil 108 hat zwei stirnseitige Kontaktflächen 110, 112 mit denen es an gegenüberliegenden Stirnflächen 111, 113 der Deckel 104, 106 anliegt, wodurch der Innenraum 10 in axialer und radialer Richtung begrenzt ist. Zur Abdichtung des Innenraums 10 weist das Mittelteil 108 zwei in jeweils eine Ringnut 114, 116 der Kontaktfläche 110, 112 eingesetzte Dichtungsringe 118, 120 auf, die dichtend an den Stirnflächen 111, 113 anliegen. Die Verbindung der Deckel 104, 106 mit "dem Mittelteil 108 erfolgt über nicht dargestellte Spannelemente, die gemäß Figur 3 Bohrungen 122, 124, 126, 128 der Deckel 104, 106 durchsetzen und vorliegend außerhalb des Mittelteils 108 und somit außerhalb des Innenraums 10 angeordnet sind, bei einer entsprechenden Form des Mittelteils 108 aber auch durch den Innenraum 10 verlaufen können.The middle part 108 has two frontal contact surfaces 110, 112 with which it abuts on opposite end surfaces 111, 113 of the cover 104, 106, whereby the inner space 10 is limited in the axial and radial directions. In order to seal the interior 10, the center part 108 has two sealing rings 118, 120 which are inserted into an annular groove 114, 116 of the contact surface 110, 112 and bear sealingly against the end faces 111, 113. The connection of the cover 104, 106 with " the middle part 108 via not shown clamping elements, which according to Figure 3 holes 122, 124, 126, 128 of the cover 104, 106 enforce and present outside of the middle part 108 and thus outside of the interior 10 are arranged , but can also extend through the interior 10 at a corresponding shape of the central portion 108.
Das Mittelteil 108 hat gemäß Figur 3 einen etwa rohrförmigen bzw. ringförmigen Querschnitt, der zur Aufnahme von erfindungsgemäßen Rohren 134, 136 des Saugbzw. Druckkanals 26, 28 zwei diametral angeordnete bogenförmige Erweiterungen 130, 132 zum Umgreifen der Rohre 134, 136 aufweist.The middle part 108 has, according to FIG. 3, an approximately tubular or annular cross-section which is suitable for receiving tubes 134, 136 according to the invention of the suction or the like. Pressure channel 26, 28 two diametrically arranged arcuate extensions 130, 132 for engaging around the tubes 134, 136 has.
Zur Herstellung des erfindungsgemäßen Mittelteils 108 wird vorzugsweise ein Rohr auf seine axiale Soll-Länge plangedreht und in die Kontaktflächen 110, 112 werden die Ringnuten 114, 116 eingebracht. Anschließend wird das Rohr entsprechend verformt, so dass sich die diametral angeordneten Erweiterungen 130, 132 ausbilden. Dann werden die Kontaktflächen 110, 112 nachbearbeitet und die Dichtungsringe 118, 120 eingesetzt.To produce the central part 108 according to the invention, a tube is preferably turned to its axial nominal length, and the annular grooves 114, 116 are introduced into the contact surfaces 110, 112. Subsequently, the tube is deformed accordingly, so that the diametrically arranged extensions 130, 132 form. Then, the contact surfaces 110, 112 are reworked and the sealing rings 118, 120 used.
Die Rohre 134, 136 verlaufen gemäß Figur 1 achsparallel zur Drehachse der Antriebswelle 12 und bestehen vorzugsweise aus Stahl oder einem hochdruckfesten Kunststoff. Sie sind in dem Innenraum 10 aufgenommen und von einer Innenumfangswandung des Mittelteils 108 radial beabstandet, so dass Schwingungen, die zum Beispiel aufgrund von Pulsation in dem Druckmittel in sie eingeleitet werden, nicht auf das Gehäuse 4 übertragen werden und somit ein leiser bzw. geräuscharmer Betrieb der erfindungsgemäßen Axialkolbenmaschine 2 möglich ist. Die Rohre 134; 136 sind zwischen den Deckel 104, 106 eingespannt und tauchen endseitig in eine stufenförmige Erweiterung der Kanalabschnitte 138, 140, 142, 144 ein. Zur Abdichtung der Mündungsbereiche zwischen den Rohren 134, 136 und den Kanalabschnitten 138, 140, 142, 144 ist in jede radiale Erweiterung jeweils ein Dichtring 162, 164, 166, 168 eingesetzt, der die Rohre 134, 136 im Bereich ihrer Endabschnitte umgreift. Die axiale Höhe der Dichtringe 162, 164, 166, 168 entspricht der axialen Tiefe der Erweiterungen, so dass die Dichtringe 162, 164, 166, 168 bündig mit den Stirnflächen 111, 113 abschließen. Offenbart ist eine Axialkolbenmaschine mit einem mehrteiligen Gehäuse zum Begrenzen eines Innenraums, in dem zwei Schrägscheiben aufgenommen sind, an der jeweils eine Zylindertrommel abgestützt ist, und mit einem Saug- und einem Druckanschluss, die über einen Saug- bzw. Druckkanal mit Zylinderräumen der Zylindertrommel verbunden sind, wobei ein Abschnitt des Saug- bzw. Druckkanals jeweils durch ein in den Innenraum eingesetztes Rohr gebildet ist, sowie ein Verfahren zur Herstellung einer derartigen Axialkolbenmaschine. The tubes 134, 136 extend according to Figure 1 axially parallel to the axis of rotation of the drive shaft 12 and are preferably made of steel or a high pressure resistant plastic. They are received in the interior space 10 and radially spaced from an inner peripheral wall of the central portion 108, so that vibrations introduced thereto, for example due to pulsation in the pressure medium, are not transmitted to the housing 4 and thus quiet operation the axial piston machine 2 according to the invention is possible. The tubes 134; 136 are clamped between the cover 104, 106 and dive end into a stepped extension of the channel sections 138, 140, 142, 144 a. To seal the mouth regions between the tubes 134, 136 and the channel sections 138, 140, 142, 144, a sealing ring 162, 164, 166, 168 is inserted into each radial extension, which surrounds the tubes 134, 136 in the region of their end sections. The axial height of the sealing rings 162, 164, 166, 168 corresponds to the axial depth of the extensions, so that the sealing rings 162, 164, 166, 168 are flush with the end faces 111, 113. Disclosed is an axial piston machine with a multi-part housing for defining an interior, in which two swash plates are accommodated, on each of which a cylinder drum is supported, and with a suction and a pressure port, which is connected via a suction or pressure channel with cylinder chambers of the cylinder drum are, wherein a portion of the suction or pressure channel is formed in each case by a tube inserted into the interior, and a method for producing such an axial piston machine.
Bezuqszeichenliste:LIST OF REFERENCES:
2 Axialkolbenmaschine2 axial piston machine
4 Gehäuse4 housing
6 Sauganschluss6 suction connection
8 Druckanschluss8 pressure connection
10 Innenraum10 interior
12 Antriebswelle12 drive shaft
14 Schrägscheibe14 swash plate
16 Schrägscheibe16 swash plate
18 Zylindertrommel18 cylinder drum
20 Zylindertrommel20 cylinder drum
22 Kolben22 pistons
24 Kolben24 pistons
26 Saugkanal26 suction channel
28 Druckkanal28 pressure channel
30 Wälzlager30 rolling bearings
31 Wälzlager31 rolling bearings
32 Innenbohrung32 internal bore
33 Sackbohrung33 blind hole
34 Dichtring34 sealing ring
36 Stützfläche36 support surface
38 Stützfläche38 support surface
40 Zylinderhülse40 cylinder sleeve
42 Zylinderhülse42 cylinder sleeve
44 Antriebsflansch44 drive flange
46 Doppelkolben46 double piston
52 Mitnehmer52 drivers
54 Flanschteil54 flange part
58 Nabenteil58 hub part
60 Spannfeder60 tension spring
62 Stützring62 support ring
64 ümfangsnut64 circumferential groove
S6 SicherungsringS6 circlip
68 Ringstirnfläche68 ring end face
70 Stützringfläche 72 Entlastungsnut70 support ring surface 72 relief groove
80 ZyIinderbohrung80 ZyIinderbohrung
82 Schulter82 shoulder
84 Gewindeeinsatz84 threaded insert
86 Innengewindebohrung86 internally threaded hole
88 Flansch88 flange
90 Bohrung90 bore
92 Durchbruch92 breakthrough
94 Steuerniere94 control animals
96 Steuerniere96 control animals
98 Steuerniere98 control animals
100 Steuerniere100 control animals
101 Taille101 waist
102 Stirnfläche102 face
104 Deckel104 Lid
106 Deckel106 Lid
108 Mittelteil108 middle part
110 Kontaktfläche110 contact area
111 Stirnfläche111 face
112 Kontaktfläche112 contact area
113 Stirnfläche113 face
114 Ringnut114 annular groove
116 Ringnut116 ring groove
118 Dichtungsring118 sealing ring
120 Dichtungsring120 sealing ring
122 Bohrung122 bore
124 Bohrung124 bore
126 Bohrung126 bore
128 Bohrung128 bore
130 Erweiterung130 extension
132 Erweiterung132 Extension
134 Rohr134 pipe
136 Rohr136 pipe
138 Kanalabschnitt138 channel section
140 Kanalabschnitt140 channel section
142 Kanalabschnitt 144 Kanalabschnitt142 channel section 144 channel section
152 Dichtring152 sealing ring
164 Dichtring164 sealing ring
166 Dichtring166 sealing ring
168 Dichtring 168 sealing ring
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510044386 DE102005044386A1 (en) | 2005-09-16 | 2005-09-16 | axial piston |
| DE102005044386.9 | 2005-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007033742A1 true WO2007033742A1 (en) | 2007-03-29 |
Family
ID=37440725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/008253 Ceased WO2007033742A1 (en) | 2005-09-16 | 2006-08-23 | Axial piston engine |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102005044386A1 (en) |
| WO (1) | WO2007033742A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010054415A1 (en) | 2010-12-14 | 2012-06-14 | Robert Bosch Gmbh | Hydrostatic pump assembly has two displacement pumps, where former displacement pump has working space with high pressure medium flow path that is brought into pressure fluid connection with another working space of latter displacement pump |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL284788A (en) * | ||||
| US3291068A (en) * | 1956-05-29 | 1966-12-13 | Reiners Walter | Hydraulic axial-piston machine |
| WO2003058035A1 (en) * | 2002-01-12 | 2003-07-17 | Innas B.V. | Hydraulic device |
-
2005
- 2005-09-16 DE DE200510044386 patent/DE102005044386A1/en not_active Withdrawn
-
2006
- 2006-08-23 WO PCT/EP2006/008253 patent/WO2007033742A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL284788A (en) * | ||||
| US3291068A (en) * | 1956-05-29 | 1966-12-13 | Reiners Walter | Hydraulic axial-piston machine |
| WO2003058035A1 (en) * | 2002-01-12 | 2003-07-17 | Innas B.V. | Hydraulic device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005044386A1 (en) | 2007-03-22 |
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