WO2008092571A1 - Zellenpumpe zur förderung eines fluids - Google Patents
Zellenpumpe zur förderung eines fluids Download PDFInfo
- Publication number
- WO2008092571A1 WO2008092571A1 PCT/EP2008/000330 EP2008000330W WO2008092571A1 WO 2008092571 A1 WO2008092571 A1 WO 2008092571A1 EP 2008000330 W EP2008000330 W EP 2008000330W WO 2008092571 A1 WO2008092571 A1 WO 2008092571A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell pump
- cell
- rotor
- pump
- pressure
- Prior art date
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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C2/3446—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
-
- 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
- F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
-
- 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
- F04C2250/00—Geometry
- F04C2250/10—Geometry of the inlet or outlet
- F04C2250/102—Geometry of the inlet or outlet of the outlet
Definitions
- the invention relates to a cell pump for conveying a fluid according to the preamble of claim 1.
- Cell pumps are known in which a rotor rotates within a cam ring.
- the cam ring is closed on both sides by sealing surfaces. It has an axis of rotation of the rotor is not rotationally symmetrical inner contour and surrounds a pump chamber.
- the rotor has conveying elements which move with it, bear against the inside of the lifting ring and delimit conveying cells together with the lifting ring and the rotor.
- the conveying elements are guided along the inner contour of the lifting ring, whereby the volumes of the conveying cells change.
- a suction region with increasing delivery cells is realized, and a pressure region in which the delivery cells become smaller.
- the fluid is supplied to the conveyor cell via an inlet opening connected to a suction channel and via a suction kidney embedded in at least one of the sealing surfaces.
- a suction kidney embedded in at least one of the sealing surfaces.
- the fluid squeezed out by the delivery cells is led into a pressure chamber and from there to a pressure connection of the cell pump.
- the object of the invention is therefore to provide a cell pump in which the power consumption is reduced, especially at high speeds.
- a cell pump which comprises the features mentioned in claim 1 and has a lifting ring and a rotor housed in this. On the outside of conveying elements are provided which limit together with the rotor and the lifting ring conveyor cells.
- the inner surface of the cam ring deviates from a circular shape that is concentric with the rotor, so that at least one suction region is formed with an inlet opening and at least one pressure region with an outlet opening.
- the volumes of the delivery cells increase in the suction area, while the volumes of the delivery cells are reduced in the pressure range.
- the cell pump is characterized in that its lifting ring has at least one recess in the area of the outlet opening, which enlarges the cross section of the outlet opening.
- the pumped by the cell pump fluid can therefore be relatively easily ejected from the pressure range, because the differential pressure at the outlet of the fluid, so the flow resistance is reduced.
- This has a positive effect on the power consumption of the cell pump: Particularly at high rotational speeds, at which the content of a delivery cell has to be displaced through the outlet cross-section in a short time, the torque to be supplied to the rotor is reduced, which leads to an improvement in the efficiency of the pump.
- the cell pump is designed as a vane pump:
- the cell pump is designed as a vane pump:
- the vane pump In the peripheral surface of the rotor are substantially Chen radially extending, over the width of the rotor extending slots provided in which radially movable wings are performed.
- the wings are guided along the inner contour of the lifting ring, wherein the delivery cells are delimited by the rotor, the lifting ring and two adjacent wings.
- On both sides of the cam ring are sealing surfaces, which are formed either by wall sections of the housing of the cell pump or by pressure plates.
- at least one suction and one pressure region are formed in accordance with the rotational movement of the rotor.
- the at least one suction region results in the region of the delivery cells whose volume increases during a rotation of the rotor.
- the at least one pressure region is found in the region of the delivery cells, the volume of which decreases as the rotor rotates.
- this is designed as a roller-cell pump.
- the operation of a roller-cell pump is known. It is basically referred to the comments on the vane pump.
- the at least one recess in the lifting ring is not radially continuous in the pressure region.
- the discharged from a delivery cell fluid can therefore, as usual, axially emerge from the delivery cell.
- a portion of the fluid in the radial direction via the at least one recess in the cam ring derived and can also escape from there axially.
- a pressure pocket in the pressure area is provided in the sealing surface adjacent to the lifting ring.
- Another preferred embodiment of the cell pump is characterized in that the at least one recess in the lifting ring in the pressure region is designed to be radially continuous. This creates a second outlet opening in the pressure region of the cell pump.
- an embodiment of the cell pump is preferred, which is characterized in that the radially continuous recess in the cam ring is realized by a bore.
- FIG. 1 shows a schematic cross section through a first embodiment of a cell pump
- Figure 2 is a schematic longitudinal section through the embodiment of the cell pump according to Figure 1;
- FIG. 4 shows a schematic longitudinal section through the exemplary embodiment of the cell pump according to FIG. 3.
- Figure 1 shows a first embodiment of a cell pump 1 in cross section. It comprises a rotor 3 which is rotatably mounted within a cam ring 5 and can be set in rotation via a shaft 7.
- the rotor 3 is provided with conveying elements, which are designed here as wings 9.
- the cell pump 1 shown here is therefore a vane pump. Instead of the wings can Rollers are also provided to realize a roller-cell pump.
- the wings 9 are housed in slots 11 which extend radially in the main body of the rotor and extend over the width thereof, which is measured here perpendicular to the image plane.
- the wings are designed so that they slide with their radially outer ends on the inner surface 13 of the cam ring 5 along and sealingly abut there.
- the inner surface 13 deviates in its contour from a circular shape, so that the blades 9 protrude more or less far from its base body upon rotation of the rotor.
- Conveying cells 15 are enclosed between two adjacent blades, which are bounded on one side by the inner surface 13 of the cam 5 and on the other hand by the outer surface 17 of the rotor 3, moreover, viewed in the circumferential direction, by the two adjacent blades. These lie with their radially to the shaft 7 extending outer edges on the side adjacent to the cam ring 3 sealing surfaces, so that the conveyor cells 15 are sealed against each other and against the environment.
- the conveying cells increase in a suction region in which a fluid is sucked in via an inlet opening 21.
- the delivery cell 15 initially located in the suction region 19 is sealed with respect to the inlet opening 21 and enters a pressure region 23 in which the volume of the delivery cell is reduced by the distance between the inner surface 13 of the lifting ring 5 and the outer surface 17 of the rotor 3 is reduced, so that the wings are inserted into the rotor 3.
- this is done in a conveyor cell existing medium, that is, the fluid sucked through the inlet opening 21, discharged through an outlet opening 25.
- the inlet opening 21 and the outlet opening 25 are formed by depressions which are provided in a sealing surface bounding the delivery cells laterally, the depressions being referred to as inlet or suction kidneys or as outlet or pressure kidneys.
- the sealing surfaces can be formed by a housing inner wall of the cell pump 1.
- the rotor 3, the wings 9 and the lifting ring 5 are located between two lateral sealing plates, which laterally seal the delivery cells.
- the cell pump 1 is formed symmetrically, so that 5 sealing surfaces with suction or pressure kidneys are present on both sides of the rotor 3 and the cam ring, so that the pumped fluid accordingly also perpendicular from the top of the image plane out in a not shown here Suction cell is sucked in and pressed out vertically upwards from a conveyor cell.
- the power taken up by the cell pump 1, or the drive power to be provided for driving the cell pump 1 via the shaft 7, also depends on the flow resistance, especially at high rotational speeds, which is present in the pressure region 23 when the delivered fluid emerges.
- a differential pressure sets in addition to the system pressure of the consumer system, which greatly influences, more precisely increases, the power absorbed by the cell pump 1, especially at high rotational speeds.
- At least one recess 27, 27 ' is provided in the pressure region 23, 23', which is in fluid communication with the associated outlet opening 25, 25 '. From a pressurized delivery cell can in the pressure range 23, 23 'the funded fluid radially outward into the respective recess 27, 27' exit.
- the pressure kidneys provided in the sealing surfaces are enlarged so that the fluid entering the recesses 27, 27 'can escape into the associated pressure kidney.
- FIG. 1 shows a side view of the rotor 3 and of the lifting ring 5. Identical parts, which also result from FIG. 1, are provided with the same reference numerals, so that reference is made to the description relating to FIG.
- the rotor 3 is arranged, which is supported by the shaft 7 and can be set in rotation about this. Visible here is a wing 9, which is housed in a radially extending to the axis of rotation 29 of the shaft 7 slot 11 and rests with its radially outer edge on the inner surface 13 of the cam ring 9, also with its side edges on the side of the lifting ring 5 and On the rotor 3 adjacent sealing surfaces 31, 33, which are here realized by pressure plates 35, 37 and in which the inlet or Auslassnieren are introduced.
- the recess 27 'formed here as a recess 27' is introduced into the right side surface of the cam ring 3, which in FIG. 1 represents the observer in plan view.
- a recess 27'a is also introduced into the opposite side surface of the cam ring 5. This opens to the inner side 13 of the cam ring, so that it is not sealed by the radially outer edge of a wing 9.
- the medium conveyed therefrom can emerge from a delivery cell in the axial direction, ie, parallel to the axis of rotation 29 of the shaft 7 on the right and left, and thus reaches a pressure chamber 39 and from there to a consumer.
- the fluid conveyed by a delivery cell into a pressure region 23 ' can not only escape in the axial direction, but also reaches the at least one recess 27', 27'a in the radial direction and then can escape axially therefrom to get into the pressure chamber 39.
- the pressure chamber 39 surrounds the lifting ring 5. It is otherwise closed in a pressure-tight manner to the outside by a cover 41.
- the recesses are provided symmetrically in the side surfaces of the cam ring 5.
- the recesses 27 'and 27'a can be seen.
- two recesses are also provided, namely those which can be seen in FIG Recess 27 and concealed by the cam 5 recess 27a. This is not shown in Figure 2 due to the apparent through the line BB cut guide in Figure 2.
- the recesses 27, 27a, 27 'and 27'a extend from the inner surface 13 of the cam ring 5 over a certain range radially outwards. However, it is provided that they open only laterally, ie in the axial direction and not completely overlap the cam 5 in the radial direction. The recesses are therefore sealed radially outward.
- FIGs 3 and 4 a modified embodiment of the pump cell pump 1 is shown, which differs solely by that shown in Figure 1 and 2, that the recesses 27, 27a, 27 'and 27'a mentioned here over the entire in the radial Direction measured thickness of the cam ring extend, so that therefore from the inner surface 13 a fluid connection to the peripheral surface 43 of the cam ring 5 results.
- Such a bore may also be provided in addition to the recesses 27, 27a, 27 'and 27'a, irrespective of whether they open in the radial direction, as shown in FIGS. 3 and 4, or not, as in the figures 1 and 2 shown.
- the exemplary embodiments illustrated here are distinguished by an enlarged outlet cross-section, that is to say that in the pressure region 23, 23 'the fluid conveyed by the cell pump 1 can more easily enter a pressure chamber 39. Due to the reduced flow resistance or lower differential pressure is achieved that the power consumption of the cell pump 1 is significantly reduced, especially at high speeds, which leads to an improvement in Pum- pen Obersgrads.
- the outlet cross-section mentioned here can be realized by recesses which extend over the entire height of the lifting ring (see FIGS. 3 and 4) or only over part of its height (see FIGS. 1 and 2). Instead of the recesses or in addition, at least one bore 45 can be realized, which reduce the flow resistance.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112008000063T DE112008000063A5 (de) | 2007-02-01 | 2008-01-17 | Zellenpumpe zur Förderung eines Fluids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007005022.6 | 2007-02-01 | ||
DE102007005022 | 2007-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008092571A1 true WO2008092571A1 (de) | 2008-08-07 |
Family
ID=39226707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/000330 WO2008092571A1 (de) | 2007-02-01 | 2008-01-17 | Zellenpumpe zur förderung eines fluids |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE112008000063A5 (de) |
WO (1) | WO2008092571A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009006453A1 (de) * | 2009-01-28 | 2010-07-29 | Bayerische Motoren Werke Aktiengesellschaft | Fluidpumpe |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB602524A (en) * | 1945-10-16 | 1948-05-28 | George William Francis Moorley | An improved vane type motor or pump |
GB807607A (en) * | 1956-08-08 | 1959-01-21 | Gilbert & Barker Mfg Co | Variable-capacity outwardly-sliding vane pump |
GB894669A (en) * | 1959-12-22 | 1962-04-26 | Hobourn Eaton Mfg Co Ltd | Rotary pump |
JPH033987A (ja) * | 1989-05-30 | 1991-01-10 | Jatco Corp | 可変容量型ベーンオイルポンプ |
JPH03275993A (ja) * | 1990-03-22 | 1991-12-06 | Toyo A Tec Kk | 可変容量型ベーンポンプ |
DE19846815A1 (de) * | 1997-10-16 | 1999-04-22 | Luk Fahrzeug Hydraulik | Ventilanordnung und Pumpe für ein Getriebe |
US6312243B1 (en) * | 1997-12-08 | 2001-11-06 | Van Doorne's Transmissie B.V. | Roller vane pump having straight line segments on the rotor |
WO2004072444A1 (de) * | 2003-02-14 | 2004-08-26 | Luk Automobiltechnik Gmbh & Co. Kg | Pumpenkombination |
-
2008
- 2008-01-17 DE DE112008000063T patent/DE112008000063A5/de not_active Ceased
- 2008-01-17 WO PCT/EP2008/000330 patent/WO2008092571A1/de active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB602524A (en) * | 1945-10-16 | 1948-05-28 | George William Francis Moorley | An improved vane type motor or pump |
GB807607A (en) * | 1956-08-08 | 1959-01-21 | Gilbert & Barker Mfg Co | Variable-capacity outwardly-sliding vane pump |
GB894669A (en) * | 1959-12-22 | 1962-04-26 | Hobourn Eaton Mfg Co Ltd | Rotary pump |
JPH033987A (ja) * | 1989-05-30 | 1991-01-10 | Jatco Corp | 可変容量型ベーンオイルポンプ |
JPH03275993A (ja) * | 1990-03-22 | 1991-12-06 | Toyo A Tec Kk | 可変容量型ベーンポンプ |
DE19846815A1 (de) * | 1997-10-16 | 1999-04-22 | Luk Fahrzeug Hydraulik | Ventilanordnung und Pumpe für ein Getriebe |
US6312243B1 (en) * | 1997-12-08 | 2001-11-06 | Van Doorne's Transmissie B.V. | Roller vane pump having straight line segments on the rotor |
WO2004072444A1 (de) * | 2003-02-14 | 2004-08-26 | Luk Automobiltechnik Gmbh & Co. Kg | Pumpenkombination |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009006453A1 (de) * | 2009-01-28 | 2010-07-29 | Bayerische Motoren Werke Aktiengesellschaft | Fluidpumpe |
Also Published As
Publication number | Publication date |
---|---|
DE112008000063A5 (de) | 2009-12-31 |
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