EP1292771A1 - Pump - Google Patents
PumpInfo
- Publication number
- EP1292771A1 EP1292771A1 EP01943472A EP01943472A EP1292771A1 EP 1292771 A1 EP1292771 A1 EP 1292771A1 EP 01943472 A EP01943472 A EP 01943472A EP 01943472 A EP01943472 A EP 01943472A EP 1292771 A1 EP1292771 A1 EP 1292771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pressure plate
- pressure
- pump chamber
- chamber
- 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.)
- Granted
Links
- 125000006850 spacer group Chemical group 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003815 abdominal wall Anatomy 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
-
- 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
Definitions
- the invention relates to a pump with a housing which has a recess in which a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring, and a pump element which can be driven in rotation and which is arranged in the pump chamber , and with a pressure space delimited by the recess and the pressure plate.
- a pump which comprises a housing in which a recess is formed.
- a pump unit is arranged in the recess and has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring and a pump element which can be driven in rotation. This is located in the pump chamber.
- the pump has a pressure space delimited by the recess and one of the pressure plates.
- the pump is characterized in that a circumferential spacer is located between the bearing surfaces of the pump chamber ring and the pressure plate on the pressure chamber side.
- a force acts on the one hand on the elliptical or circular surface of the pressure plate on the pressure chamber side, which lies directly opposite the through opening of the pump chamber ring; on the other hand, due to the medium pressure, a force acts on the annular surface of the pressure plate on the pressure chamber side, so that a counterforce is built up which counteracts the deflection of the pressure plate in the area of the circular surface.
- the deflection of the pressure plate is at least least reduced, so that the leakage gap once set also remains essentially unchanged during operation, ie under pressure, temperature, etc., so that this leakage gap can be chosen to be narrow or narrow, so that the volumetric efficiency of the pump is improved , Since the deflection of the pressure plate is largely compensated, this pressure plate does not have to be particularly strong, as a result of which the axial overall length of the pump can be reduced.
- a circumferential seal is arranged between the side wall of the recess in the housing and the pressure plate on the pressure chamber side, which seal is thus between the side wall of the recess and the edge surface of the printing plate.
- this also ensures that the cavity behind the pressure plate between the pump chamber ring and the pressure plate ring surface is not subjected to the medium pressure.
- a particularly preferred exemplary embodiment is distinguished in that the spacer is formed in one piece with the pump chamber ring and / or the pressure plate on the pressure chamber side.
- the spacer can be easily produced in one piece with the pump chamber ring or the pressure plate by appropriate manufacturing processes, for example machining processes.
- the pump according to the invention is thus characterized by cost-effective production, but the volumetric efficiency is nevertheless improved.
- the pressure space lies between the pressure plate on the pressure space side and the bottom of the recess.
- FIG. 1 shows a first exemplary embodiment of a pump
- FIG. 2 shows a second exemplary embodiment of a pump
- FIG. 3 shows schematically the support according to the invention of the pressure plate on the pressure chamber side of a pump
- Figure 4 shows a third embodiment of a pump.
- the pump described below can be designed as a vane, blocking vane and roller cell pump, in which the pump element which can be driven in rotation is formed by a rotor, in which, depending on the type of pump, vanes or rollers are used, or in the configuration of a blocking vane pump. is realized as a contour element.
- the pump it would also be conceivable to design the pump as a gear pump.
- Such pumps and their function are known per se, so that the precise configuration of the pump element which can be driven in rotation is not described in more detail below.
- FIG. 1 shows, in a highly simplified manner and only partially shown, a pump 1 in cross section, which comprises a housing 2.
- a recess 3 is made in this housing 2, which — not shown here — is closed by a housing cover that can be fastened to the housing 2 of the pump 1.
- a pump unit 4 is arranged in the recess 3 and has a pump chamber 5 which is delimited by a pump chamber ring 6 and two pressure plates 9 and 10 resting on its annular bearing surfaces 7 and 8.
- the housing 2 can also be designed such that it delimits the pump chamber 5.
- Zumin- least the pressure plate 10 is however provided.
- One of the pressure plates 10 lies at a distance from the bottom 11 of the essentially circular cylindrical recess 3. This pressure plate 10 thus forms with the recess 3 a pressure chamber 12 into which the medium conveyed by a pump element 13 which can be driven in rotation is introduced.
- the pressure chamber 12 has a connection (not shown here) to a pump-side consumer connection (not shown).
- the rotationally drivable pump element 13 is the above-mentioned rotor of a vane, barrier vane or roller cell pump or a gear of a gear pump. In order to be able to drive the pump element 13 in a rotational manner, it is arranged on one end 14 of a drive shaft 15 which is rotatably mounted in the housing 2. At the other end, not shown here, a drive torque can be introduced.
- the drive shaft 15 passes through the pressure chamber 12 and passes through an opening 16, preferably centrally, in the pressure plate 10.
- a circumferential sealing element 17 is arranged within the opening 16. Sealing is achieved through a sealing gap.
- a sealing element is preferably likewise arranged between the lateral surface of the drive shaft 15 and the drive shaft opening 18 formed in the housing 2, in order to seal the pressure chamber 12 to the outside, like the sealing element 17.
- This sealing element can be designed as a radial shaft sealing ring 16 '.
- a circumferential spacer 19 is arranged between the bearing surface 7 present on the pump chamber ring 6 and the bearing surface 18 ′ lying opposite it, which in the present exemplary embodiment according to FIG. 1 is formed in one piece with the pump chamber ring 6.
- a preferably open-ended, radially outer circumferential groove 20 is introduced into the end face 7 'of the pump chamber ring 6, so that a' cavity 21 is formed at least in regions between the pressure plate 10 and the pump chamber ring 6.
- the spacer 19 is arranged on the pump chamber ring 6 in such a way that it divides the pressure plate surface 22 facing the pump chamber ring 6 into two partial areas, namely the pressure plate circle or ellipse surface 24 facing the opening 23 of the pump chamber ring 6 and the radially outer pressure plate ring surface 24 '.
- the pressure plate circle or ellipse surface 24 is therefore in the circle or ellipse region 24 ′′, whereas the pressure plate ring surface 24 ′ lies in the ring region 24 ′′ ′′ of the pressure plate 10.
- the spacer 19 is at a distance from the side wall 25 of the recess 3.
- a pressure plate ellipse surface is obtained when the opening 23 is essentially elliptical.
- the pump element 13 then preferably has an axis of rotation in which the center point of the ellipse lies.
- the opening 23 can also be circular in cross section, in which case the pump element has an axis of rotation which is offset from the center of the opening 23. It can also be seen from FIG.
- a circumferential seal 27 is arranged, which preferably comes to lie in an annular groove 28, which is introduced into the peripheral surface 26 in the exemplary embodiment shown.
- the seal 27 it would also be conceivable to arrange the seal 27 in an annular groove to be formed in the housing 2, which would thus be formed in the side wall 25 of the recess 3.
- FIG. 2 shows a second exemplary embodiment of a pump 1.
- the same or equivalent parts are provided in the pump 1 shown in FIG. 2 with the same reference numerals as in FIG. 1.
- the spacer 19 in the pump 1 according to FIG. 2 is formed in one piece with the pressure plate 10 on the pressure chamber side and thus forms an elevation on the pressure plate surface 22.
- a preferably open edge, radially outer annular groove 29 is introduced in the ring area 24 ′′ ′′, so that the spacer 19 — viewed in plan view — is designed as a flat circular disk.
- the spacer 19 can also be provided as a separate insert which then comes to rest between the pressure plate 10 and the pump chamber ring 6.
- FIG. 4 shows a third exemplary embodiment of a pump 1.
- the pump In contrast to the exemplary embodiments according to FIGS. 1 and 2, the penhunt ring 6 is not supported on the side wall 25 of the recess 3. Rather, it is held centered on the pressure plate 9.
- connecting elements 31 or centering pins can be provided, which can be designed as connecting bolts.
- These connecting elements 31 can be provided both between the pump chamber ring 6 and the pressure plate 9 and — in the form that deflection of the pressure plate 10 is not hindered by this — can also be provided between the pump chamber ring 6 and the pressure plate 10 on the pressure chamber side.
- Such connecting elements 31 can also be used in the pumps 1 according to FIGS. 1 and 2.
- the radial ' extent, in particular the outer diameter A of the pump chamber ring 6, is thus smaller in the exemplary embodiment of the pump 1 according to FIG. 4 than the radial extent, for example the outer diameter B, of the pressure plate 10 on the pressure chamber side.
- the belly formation by bending the pressure plate in the circular area occurs in known pumps in that areas with different medium pressures are present within the pump chamber, since at least one pressure and suction area are formed within the pump chamber 5, in which different medium pressures thus prevail, so that the forces acting in the circular area of the pressure plate cannot be compensated solely by the forces resulting from the medium pressures.
- the spacer 19 according to the invention is provided in the pump 1, however, the pressure forces K ′′ acting on the pressure plate surface 22 from the pump chamber 5 are undercut by the forces K ′ acting on the pressure plate ring surface 24 ′. supports, so that a deflection of the pressure plate 10 which is not desired for the respective application is avoided. As a result, the leakage gap present between the pressure plate circular surface 24 and the pump element 13 is essentially not changed during operation of the pump 1; it can therefore be interpreted very narrowly, which improves the volumetric efficiency of the pump 1.
- the pump chamber ring 6 means that between the side wall 25 and the rocking edge 33 lying lever arm 34 ( Figure 3) on the pressure plate 10 in its length L can be varied in order to change the counter-bending moment, in particular to adapt to pressure conditions in the pressure chamber 12 and in the pump chamber 5. If the pump chamber ring 6 lies with its outer circumferential surface on the side wall 25, as shown in FIGS. 1 and 2, the length L of the lever arm 34 on the pressure plate 10 can be adjusted by a corresponding distance of the spacer 19 from the side wall 25.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10027811 | 2000-06-05 | ||
DE10027811A DE10027811A1 (en) | 2000-06-05 | 2000-06-05 | Cellular pump with housing and pressure plates uses distance piece between pressure plate and chamber ring surfaces plus seal round between pressure-side plate and housing. |
PCT/EP2001/006290 WO2001094788A1 (en) | 2000-06-05 | 2001-06-01 | Pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1292771A1 true EP1292771A1 (en) | 2003-03-19 |
EP1292771B1 EP1292771B1 (en) | 2006-02-22 |
Family
ID=7644757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01943472A Expired - Lifetime EP1292771B1 (en) | 2000-06-05 | 2001-06-01 | Pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040037729A1 (en) |
EP (1) | EP1292771B1 (en) |
DE (3) | DE10027811A1 (en) |
ES (1) | ES2258532T3 (en) |
WO (1) | WO2001094788A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2286088B1 (en) * | 2008-05-08 | 2011-11-23 | ixetic Bad Homburg GmbH | Pump |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2477797A (en) * | 1945-08-06 | 1949-08-02 | Nellie M Gottschalt | Gear pump with wear compensating means |
DE1553282C3 (en) * | 1963-07-05 | 1975-05-22 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Rotary piston machine, in particular rotary piston pump |
US3549288A (en) * | 1969-03-05 | 1970-12-22 | Ford Motor Co | Positive displacement slipper pump with flangeless drive shaft |
DE2526447C3 (en) * | 1975-06-13 | 1981-04-16 | Daimler-Benz Ag, 7000 Stuttgart | Vane pump |
US4207038A (en) * | 1978-05-01 | 1980-06-10 | Ford Motor Company | Power steering pump |
US4386891A (en) * | 1981-04-23 | 1983-06-07 | General Motors Corporation | Rotary hydraulic vane pump with undervane passages for priming |
DE3638848A1 (en) * | 1986-11-13 | 1988-05-19 | Bosch Gmbh Robert | Unit for the delivery of fuel from a tank to the internal combustion engine, especially of a motor vehicle |
US5411376A (en) * | 1993-12-15 | 1995-05-02 | Walbro Corporation | Fuel pump with noise suppression |
EP0758716B1 (en) * | 1995-08-14 | 2003-12-10 | LuK Fahrzeug-Hydraulik GmbH & Co. KG | Vane pump |
WO1997049915A1 (en) * | 1996-06-21 | 1997-12-31 | Luk Fahrzeug-Hydraulik Gmbh & Co. Kg | Vane pump |
DE19651683A1 (en) * | 1996-12-12 | 1998-06-18 | Otto Eckerle | Internal gear pump without filler |
DE19802443C1 (en) | 1998-01-23 | 1999-05-12 | Luk Fahrzeug Hydraulik | Pump with housing in which is pump unit |
-
2000
- 2000-06-05 DE DE10027811A patent/DE10027811A1/en not_active Withdrawn
-
2001
- 2001-06-01 US US10/296,839 patent/US20040037729A1/en not_active Abandoned
- 2001-06-01 DE DE10192361T patent/DE10192361D2/en not_active Expired - Fee Related
- 2001-06-01 DE DE50109002T patent/DE50109002D1/en not_active Expired - Lifetime
- 2001-06-01 ES ES01943472T patent/ES2258532T3/en not_active Expired - Lifetime
- 2001-06-01 WO PCT/EP2001/006290 patent/WO2001094788A1/en active IP Right Grant
- 2001-06-01 EP EP01943472A patent/EP1292771B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0194788A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50109002D1 (en) | 2006-04-27 |
WO2001094788A1 (en) | 2001-12-13 |
US20040037729A1 (en) | 2004-02-26 |
DE10192361D2 (en) | 2003-05-08 |
ES2258532T3 (en) | 2006-09-01 |
EP1292771B1 (en) | 2006-02-22 |
DE10027811A1 (en) | 2001-12-13 |
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