EP4337846A1 - Pumpenanordnung, insbesondere für ein verstellbares fahrwerkssystem - Google Patents
Pumpenanordnung, insbesondere für ein verstellbares fahrwerkssystemInfo
- Publication number
- EP4337846A1 EP4337846A1 EP22728121.9A EP22728121A EP4337846A1 EP 4337846 A1 EP4337846 A1 EP 4337846A1 EP 22728121 A EP22728121 A EP 22728121A EP 4337846 A1 EP4337846 A1 EP 4337846A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pump arrangement
- arrangement according
- housing
- pressure medium
- 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
Classifications
-
- 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
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
- F04B11/0016—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
- F04B53/002—Noise damping by encapsulation
-
- 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
- F04C2240/30—Casings or housings
Definitions
- the invention relates to a pump arrangement, in particular for an adjustable chassis system, according to the preamble of claim 1.
- DE 10 2015 208 785 A1 describes an adjustable chassis system with a pump arrangement.
- the embodiment according to FIG. 4 shows a pump arrangement with an annular reservoir which encloses at least a longitudinal section of the pump arrangement.
- the specific structural design of the pump arrangement, in particular of the reservoir, is not the subject of DE 10 2015 208 785 A1.
- DE 10 2018 129 539 A1 discloses a pump arrangement with a ring accumulator as part of an actuation module for a drive train.
- the reservoir encloses at least part of the pump arrangement.
- the ring accumulator includes an axially movable ring piston, which separates a gas space from a pressure medium space.
- the object of the present invention is to further develop the concept of the ring-shaped store in a pump arrangement.
- the object is achieved in that the gas volume is chambered in a flexible enveloping body within the accumulator housing that is closed off from the pressure medium volume.
- the use of the flexible enveloping body has led to a significant improvement in noise emissions.
- the gas column within the enveloping body reduces the noise transmission from the pump and the pump drive to the environment.
- the enveloping body has an arched shape that is adapted to the cross section of the accumulator.
- the enveloping body is supported at least partially on a wall of the accumulator housing.
- several enveloping bodies can be arranged in the store.
- the pressure medium volume or the pressure characteristic can be dimensioned with a constant accumulator size via the number of enveloping bodies.
- the enveloping body has a filling connection which penetrates through a wall of the accumulator housing. In this way, the filling of the enveloping body can, if required, only be carried out during assembly.
- the filling connection of the at least one enveloping body and a filling connection for the pressure medium are arranged in a common surface area of the accumulator housing. This feature is particularly advantageous in tight installation spaces, where the two connections can be arranged directly next to each other.
- the filling connection can also have a safety fuse, e.g. in the event of a fire, for example, to achieve controlled gas evacuation so that the storage tank is not over-pressurised.
- At least two accumulators can also be stacked axially and have contact surfaces facing one another for a hydraulic connection connection between the at least two accumulators.
- a standard memory can then be used and then multiplied to a desired memory volume via the stack arrangement.
- At least two reservoirs can also be arranged concentrically with one another, with an outer lateral surface of a storage housing of an inner reservoir forming an inner lateral surface of an outer storage housing.
- FIG. 1 Schematic representation of the application of the pump assembly
- FIG. 1 shows the principle of the combination of a pump arrangement 1 with a vibration damper 3.
- the pump arrangement 1 comprises a pump 5 with a pump drive 7.
- noise emissions occur which, for. B. carried into the passenger compartment.
- the pump arrangement 1 has an annular reservoir 9 which at least partially encloses the pump 5 and the pump drive 7 .
- the pump 5 preferably has two delivery directions. Valves and other components of the hydraulic system are not shown.
- the accumulator 9 has a rigid accumulator housing 11 in which a hydraulic pressure medium volume 13 and a gas volume 15 spatially separate therefrom are chambered.
- the gas volume 15 is chambered within the storage housing 11 in a flexible enveloping body 17 that is closed off from the pressure medium volume 13 .
- the enveloping body 17 floats within the pressure medium volume 13. In contrast to an enclosed liquid, the sound transmission of the gas within the enveloping body 17 is significantly lower.
- the enveloping body 17 thus has a sound-insulating effect for the pump arrangement 1 .
- the enveloping body 17 has an arched shape adapted to the cross section of the store 9 and is supported at least partially on a wall of the store housing 11. This radial support of the enveloping body 17 ensures that the enveloping body 17 is subjected to a comparatively low hydraulic load.
- the vibration damper 3 according to FIG. 1 is based on a cylinder 19 in which a piston rod 21 together with a valve-equipped piston 23 performs an axial displacement movement.
- the vibration damper 3 also has a reservoir 25 as a compensating space for the pressure medium displaced by the piston rod 21 .
- the compensating space 25 is radially delimited by the cylinder 19 and an outer container tube 27 .
- a piston rod guide 29 and a base 31 close the axial ends of the compensating chamber 25, which also contains a gas volume 15 and a pressure medium volume 13.
- An axially movable ring-shaped separating piston ensures that the gas and pressure medium are spatially separated. Basically, the structural design of the vibration damper 3 is subordinate for the application of the invention.
- FIG. 2 shows that the enveloping body 17 has a filling connection 37 which penetrates a wall of the accumulator housing 11 .
- the filling connection 37 of the at least one enveloping body 17 and a filling connection 39 for the pressure medium are preferably arranged in a common surface area of the storage housing 11 .
- a preferred place of attachment for the filling connections are axial cover surfaces 41, since these are designed at least partially as flat surfaces and can be hydraulically sealed correspondingly easily.
- the filling connection 37 for the filling body 17 has a closing body 43, preferably made of plastic, which can also be designed as a fuse with regard to the temperature properties. At a correspondingly high temperature, the closing body 43 melts, the gas volume 15 can escape and the reservoir 9 then loses its compressive prestress. This means that there is no pressure cushion available that e.g. B. in an accident and as a result of which a damaged memory 9 would press the pressure medium out of the memory 9 and possibly spray it. That Pressure medium in the liquid phase burns off practically without danger. The same medium as an oil cloud would be considerably more ignitable.
- FIG. 3 is intended to show in a pump arrangement 1 that the combination of a plurality of accumulators 9A; 9B is significantly simpler than in the case of an accumulator with an axially movable separating piston due to the use of the enveloping body 17.
- at least two memories 9A; 9B are stacked axially and facing contact surfaces 45; 47 an axial hydraulic connection port 49 between the at least two reservoirs 9A; 9B.
- Both memories 9A; 9B can be filled via the filling connections 37; 39 to be filled.
- an external connection line would have to be used to bridge the gas space.
- FIG. 4 shows an alternative variant of the pump arrangement 1, in which at least two reservoirs 9A; 9B are arranged concentrically to each other.
- An outer lateral surface 51 of a storage housing 53 of the inner storage 9A and an inner lateral surface 55 of an outer storage housing 57 then form the second storage 9B.
- This design would not be possible with an accumulator with a floating floating piston, since a cylinder is calibrated to either an inside diameter or an outside diameter and only the calibrated diameter is suitable as a raceway for a floating piston.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021204750.5A DE102021204750A1 (de) | 2021-05-11 | 2021-05-11 | Pumpenanordnung, insbesondere für ein verstellbares Fahrwerkssystem |
| PCT/EP2022/062190 WO2022238237A1 (de) | 2021-05-11 | 2022-05-05 | Pumpenanordnung, insbesondere für ein verstellbares fahrwerkssystem |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4337846A1 true EP4337846A1 (de) | 2024-03-20 |
| EP4337846B1 EP4337846B1 (de) | 2025-10-22 |
Family
ID=81941205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22728121.9A Active EP4337846B1 (de) | 2021-05-11 | 2022-05-05 | Pumpenanordnung, insbesondere für ein verstellbares fahrwerkssystem |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4337846B1 (de) |
| CN (1) | CN117203405A (de) |
| DE (1) | DE102021204750A1 (de) |
| WO (1) | WO2022238237A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2418667A (en) * | 1944-04-07 | 1947-04-08 | Borg Warner | Packaged power accumulator |
| DE1118500B (de) * | 1957-07-11 | 1961-11-30 | Gen Electric | Kalibriervorrichtung fuer Halogen-Lecksucher |
| DE19921436A1 (de) * | 1999-05-08 | 2000-11-16 | Daimler Chrysler Ag | Hydraulikanlage |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3223195A1 (de) * | 1982-06-22 | 1983-12-22 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Vorrichtung zum verstellen der hoehenlage der karosserie eines kraftfahrzeuges |
| RU2177107C1 (ru) * | 2000-04-26 | 2001-12-20 | Закрытое акционерное общество "Корпорация "Университетские сети знаний" | Сосуд для хранения и транспортирования сжатого газа |
| US20100099002A1 (en) * | 2008-10-21 | 2010-04-22 | Gm Global Technology Operations, Inc. | Fluid pump with an integrated mounting interface |
| US8734139B2 (en) * | 2010-07-01 | 2014-05-27 | Micropump, Inc. | Pumps and pump heads comprising volume-compensation feature |
| JP5985333B2 (ja) * | 2012-09-25 | 2016-09-06 | 株式会社ショーワ | 自動二輪車の車高調整装置 |
| DE102015208785B4 (de) | 2015-05-12 | 2020-03-19 | Zf Friedrichshafen Ag | Verstellbarer Federträger |
| DE102018129539A1 (de) | 2018-11-23 | 2020-05-28 | Schaeffler Technologies AG & Co. KG | Betätigungsmodul zum Einsatz in einem Antriebsstrang eines Kraftfahrzeugs mit einem Ringkolbendruckspeicher |
-
2021
- 2021-05-11 DE DE102021204750.5A patent/DE102021204750A1/de active Pending
-
2022
- 2022-05-05 WO PCT/EP2022/062190 patent/WO2022238237A1/de not_active Ceased
- 2022-05-05 EP EP22728121.9A patent/EP4337846B1/de active Active
- 2022-05-05 CN CN202280030587.3A patent/CN117203405A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2418667A (en) * | 1944-04-07 | 1947-04-08 | Borg Warner | Packaged power accumulator |
| DE1118500B (de) * | 1957-07-11 | 1961-11-30 | Gen Electric | Kalibriervorrichtung fuer Halogen-Lecksucher |
| DE19921436A1 (de) * | 1999-05-08 | 2000-11-16 | Daimler Chrysler Ag | Hydraulikanlage |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2022238237A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4337846B1 (de) | 2025-10-22 |
| WO2022238237A1 (de) | 2022-11-17 |
| DE102021204750A1 (de) | 2022-11-17 |
| CN117203405A (zh) | 2023-12-08 |
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