EP4337859A1 - Radialkolbenpumpe, sowie verfahren zur herstellung einer radialkolbenpumpe - Google Patents
Radialkolbenpumpe, sowie verfahren zur herstellung einer radialkolbenpumpeInfo
- Publication number
- EP4337859A1 EP4337859A1 EP22726636.8A EP22726636A EP4337859A1 EP 4337859 A1 EP4337859 A1 EP 4337859A1 EP 22726636 A EP22726636 A EP 22726636A EP 4337859 A1 EP4337859 A1 EP 4337859A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- piston pump
- radial piston
- cylinder bore
- pump according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
-
- 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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0421—Cylinders
-
- 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
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Definitions
- the present invention relates to a radial piston pump, in particular a radial piston compressor, according to the preamble of claim 1, and a method for producing a radial piston pump according to the preamble of claim 12.
- a radial piston pump is an element of fluid technology.
- this pump which can also be referred to as a pump based on the radial piston principle
- the piston-working chamber combinations are arranged radially and perpendicularly to the drive shaft, in contrast to an axial piston compressor.
- the conveying or lifting movement of each individual working piston is caused by an eccentric located on the drive shaft.
- the radial piston pump comprises a plurality of piston/working chamber combinations which extend in a star shape and radially from the drive shaft.
- the radial piston pump pumps a fluid from a low-pressure space into a high-pressure space.
- Radial piston pumps are used, for example, as compressors for coolants in air conditioning systems in motor vehicles, in particular also in electrically driven motor vehicles.
- a radial piston pump can also be referred to as a radial piston compressor or refrigerant compressor based on the radial piston principle.
- the valves for the gas exchange process are arranged as follows in the radial piston pump described here.
- the inlet valves are arranged radially with respect to the axis of rotation of the eccentric shaft, i.e. near the head side of the respective piston.
- the outlet valves are arranged axially, which brings advantages in terms of installation space and increases the freedom of design for the inlet valves, for example a larger valve diameter, greater bending length, possibly several inlet valves, etc. can be implemented.
- the outlet channel (cavity that forms a flow-side connection between the compression chamber and the high-pressure channel) is located as high as possible “up” in the cylinder chamber, near the front face of the cover.
- the outlet surface of the outlet channel (in the high-pressure chamber) is closed by the outlet valve plate, in that the plate protrudes over the outlet surface of the outlet channel (overhang) and thus seals the channel axially.
- this object is achieved by a radial piston pump, in particular a radial piston compressor, having the characterizing features of claim 1 .
- a radial piston pump in particular a radial piston compressor, having the characterizing features of claim 1 . Due to the fact that the longitudinal axis of the cylinder bore and the longitudinal axis of the cover receiving bore are not congruent, in particular are shifted in parallel, the disadvantages outlined above are overcome, or at least reduced. In particular, a reduced dead volume results from the shortening of the length of the outlet channel. Nevertheless, there remains a sufficient axial contact surface for the cover assembly. Furthermore, there is a possibility of positioning securing elements in the cover contact surface, in particular due to the offset of the pre-assembly assembly “inlet valve cover”. Furthermore, the use of simple geometric functional elements is made possible, in particular circular bores, simple and secure sealing, low costs.
- the cover receiving bore is arranged eccentrically to the cylinder bore.
- the longitudinal axis of the cylinder bore is shifted with respect to the longitudinal axis of the cover receiving bore in the direction of the fluid outlet channel or away from the fluid outlet channel.
- the fluid outlet channel can advantageously be shortened and the dead volume can thus advantageously be reduced.
- a step is provided which, at least indirectly, forms the bearing surface for an edge region of the cap.
- an inlet valve in particular in the form of a sheet metal spring valve, can be placed on such a shoulder.
- the inlet valve is then preferably arranged between the cover and the shoulder, so that the cover rests indirectly on this shoulder.
- the cylinder bore and the cover receiving bore have different diameters, in particular that the cover receiving bore has a larger diameter than the cylinder bore. In this way, for example, a completely circumferential shoulder can be created in principle.
- the radial piston pump in particular the piston-working chamber combination, has a fluid inlet channel with an inlet valve and the fluid outlet channel with an outlet valve, the fluid inlet channel being aligned radially with respect to the drive shaft and the fluid outlet channel being aligned axially.
- the fluid inlet channel is provided in the cover or the piston.
- structural advantages in particular space-saving advantages, can result.
- the inlet valve in particular an inlet valve designed as a spring-loaded sheet metal valve, is on the shoulder 4 rests.
- the inlet valve may be located between the cap and the shoulder and, as will be discussed below, pre-connected to the cap.
- the inlet valve is fastened to the cover by means of a securing element, in particular by means of a grooved nail. In this way, advantageous assembly and disassembly can be ensured by the cover and inlet valve forming an assembly unit.
- the securing elements can be arranged between the cover and the shoulder. Accordingly, the securing elements are arranged outside of the cylinder bore and there is basically no risk that the securing elements can unintentionally get into the working chamber of the piston, ie the cylinder bore.
- recesses are provided in the shoulder for partially accommodating the securing elements, in particular the grooved nails, in the shoulder.
- the safety elements can dip in sections, which is an additional safety measure that the safety elements can not accidentally get into the workspace.
- a further object of the present invention is to propose an advantageous and/or improved method for assembling a radial piston pump.
- this object is achieved by a method having the characterizing features of claim 11.
- FIG. 2 shows a schematic diagram of a radial piston pump with a radial inlet valve and an axial outlet valve
- FIG. 3 shows an enlarged representation of a region of a radial piston pump
- FIG. 5 shows a plan view of a piston-working chamber combination, in particular a cover of a radial piston pump according to the invention
- FIG. 6 shows a detail of a radial piston pump according to the invention, in particular notched nails
- FIG. 7 shows an exploded view of the cover, seal, valve and notched nails of a radial piston pump according to the invention.
- a radial piston pump essentially comprises a drive shaft 1 with an eccentric 11 and at least one piston/working chamber combination 2.
- a longitudinal axis L of the drive shaft 1 is shown in FIG. 1 to define the axial direction.
- the combination of drive shaft 1 and eccentric 11 can also be addressed as an eccentric shaft.
- the present here eccentric shaft preferably includes a circular eccentric with the advantage that 7 a roller bearing can be pushed onto the circular eccentric, which reduces contact friction and contact speed (between circular eccentric and piston).
- the piston-working chamber combination 2 essentially comprises a cylinder bore 21 and a piston 22.
- the cylinder bore 21 is closed with a cover 23 on the head side.
- the cylinder bore 21 and the cover 23 are thus preferably arranged one behind the other in the radial direction.
- the cylinder bore 21 is preferably designed in the shape of a circular cylinder.
- the cylinder bore 21 accordingly has an axis of symmetry or longitudinal axis 211 in the direction of piston movement.
- the radial piston pump comprises at least two piston-working chamber combinations 2, 2a, 2b, ..., which extend radially from the drive shaft 1.
- the radial piston pump preferably comprises at least three, preferably six, piston/working chamber combinations 2, 2a, 2b, .
- each cylinder bore 21 of the piston-working chamber combinations 2, 2a, 2b, ... is provided with a cover 23, 23a, . . . Mistake.
- the cylinder bore or the cylinder bores 21 are preferably accommodated by or formed by a basic pump body 3 .
- the basic pump body 3 is preferably a cast part.
- the basic pump body 3 can, in turn, be enclosed at least partially by a housing 4 .
- the cover(s) 23, 23a In principle, however, any other suitable type of fastening, such as screwing or a retaining ring integrated in the housing, can also be considered.
- the housing 4 overlaps the retaining ring 5.
- a fluid inlet channel 241 is provided in the cover 23 or on the head side of the cylinder bore 21 .
- the fluid inlet channel 241 is equipped with an inlet valve 24 which can selectively close or open the fluid inlet channel 241 .
- the fluid inlet channel 241 can also be provided in the piston 22, for example.
- the fluid inlet channel 241 is preferably arranged radially. 8th
- the cover 23 is preferably designed circular.
- the cover 23 is accommodated in a corresponding, preferably likewise circular, cylindrical cover receiving bore 27 provided for this purpose.
- the cover receiving bore 27 is preferably provided in the pump base body 3 .
- the cover receiving bore 27 correspondingly has an axis of symmetry or longitudinal axis 271 .
- a circular shape is preferable for the geometry of the cover 23 and the cover receiving bore 27.
- the cover receiving bore 27 for the cover 23 preferably has a larger diameter than the cylinder bore 21, so that there is a shoulder 31 between the two bores.
- This shoulder serves, at least indirectly, as a bearing surface 31 for the cover 23.
- a fluid outlet channel 25 is also provided in the cylinder bore 21 , preferably in the wall of the cylinder bore 21 .
- the fluid outlet channel 251 is equipped with an outlet valve 25 which can selectively close or open the fluid outlet channel 251 .
- the fluid outlet channel 251 is preferably arranged axially.
- the fluid F to be compressed flows via the fluid inlet channel 241 or the inlet valve 24 into the cylinder bore 21, is compressed there by the stroke movement of the piston 22 and leaves the cylinder bore 21 through the outlet valve 25 or the fluid outlet channel 251.
- the design of the valves for example as spring-loaded sheet metal valves, is well known to the person skilled in the art and does not require any further explanation here.
- Various design options or variations, in particular the number, of inlet/outlet valves, in particular also per piston/working chamber combination 2, are also conceivable.
- the longitudinal axis 211 of the cylinder bore 21 and the longitudinal axis 271 of the cover receiving bore 27 are not congruent.
- the longitudinal axis 271 of the cover receiving bore 27 is shifted parallel to the longitudinal axis 211 of the cylinder bore 21 or the 9
- Cover receiving bore 27 is arranged eccentrically to the cylinder bore 21. Such an arrangement can be seen in FIGS. 4 and 5, for example. It can also be seen here that the cover 23 is also shifted in parallel or eccentrically to the cylinder bore 21 and thus ultimately to the piston 22 .
- the longitudinal axis 211 of the cylinder bore 21 is shifted in the direction of or counter to the direction of the fluid outlet channel 251 with respect to the longitudinal axis 271 of the cover receiving bore 27 .
- the fluid outlet channel 251 can be adapted, in particular shortened, in design, as can be seen in particular by comparing FIGS. 3 and 4.
- the support on the side facing away from the HD channel is larger, i.e. the cover is shifted away from the HD area.
- the preferred version is "Away from the HD area".
- FIG 4 also shows a section of a radial piston compressor with an axially aligned outlet channel 251. The position of the piston 1 is shown in the partial stroke.
- the assembly of the "cover assembly” to the pump body 3 preferably takes place in an "overhead assembly" for the inlet valve 24. It is therefore advantageous if the inlet valve 24 is secured to the cover 23 in a pre-assembly step so that it cannot be lost.
- At least one recess 311 is preferably provided in shoulder 31, into which the securing elements 6, in particular the grooved nails or their heads, can dip.
- the assembly of a radial piston pump comprising an inlet valve, preferably a sheet metal spring valve, and a cover 23 with a fluid inlet channel 241, and a shoulder 31 provided between the cylinder bore 21 and the cover receiving bore 27, is preferably as follows.
- the assembly method may also include assembly of the seal 26 to the cover (O-ring).
- the radial piston pump proposed here can preferably be used as an air conditioning compressor or refrigerant compressor, preferably with an electric motor as the drive. Accordingly, the fluid is preferably a refrigerant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021204715.7A DE102021204715A1 (de) | 2021-05-10 | 2021-05-10 | Radialkolbenpumpe, sowie Verfahren zur Herstellung einer Radialkolbenpumpe |
| PCT/EP2022/061488 WO2022238150A1 (de) | 2021-05-10 | 2022-04-29 | Radialkolbenpumpe, sowie verfahren zur herstellung einer radialkolbenpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4337859A1 true EP4337859A1 (de) | 2024-03-20 |
| EP4337859B1 EP4337859B1 (de) | 2025-10-08 |
Family
ID=81854596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22726636.8A Active EP4337859B1 (de) | 2021-05-10 | 2022-04-29 | Radialkolbenpumpe, sowie verfahren zur herstellung einer radialkolbenpumpe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240240633A1 (de) |
| EP (1) | EP4337859B1 (de) |
| CN (1) | CN117425777A (de) |
| DE (1) | DE102021204715A1 (de) |
| WO (1) | WO2022238150A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023107253A1 (de) * | 2023-03-22 | 2024-09-26 | Thyssenkrupp Ag | Ventilzungenanordnung für einen Radialkolbenverdichter, Radialkolbenverdichter und Verfahren zur Montage einer Ventilzungenanordnung an einem Radialkolbenverdichter |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2434734A (en) | 1945-04-06 | 1948-01-20 | Copeland Refrigeration Corp | Compressor valve |
| US3112064A (en) | 1960-11-01 | 1963-11-26 | Westinghouse Electric Corp | Gas compressor valves |
| JPH0216370A (ja) * | 1988-07-01 | 1990-01-19 | Kayaba Ind Co Ltd | ラジアルピストンポンプ |
| JP2625560B2 (ja) * | 1988-09-15 | 1997-07-02 | ツァーンラートファブリーク、フリードリッヒスハーフェン、アクチエンゲゼルシャフト | ラジアルピストンポンプ |
| DE4027848A1 (de) * | 1990-09-03 | 1992-03-05 | Teves Gmbh Alfred | Kolbenpumpe |
| DE4401074B4 (de) | 1994-01-15 | 2007-01-18 | Robert Bosch Gmbh | Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine |
| DE19507295B4 (de) * | 1995-03-02 | 2004-09-02 | Siemens Ag | Radialkolbenpumpe, insbesondere Kraftstoffpumpe für einen Verbrennungsmotor |
| IT239879Y1 (it) * | 1996-12-23 | 2001-03-13 | Elasis Sistema Ricerca Fiat | Perfezionamenti ad una pompa a pistoni, in particolare ad una pompa apistoni radiali per il carburante di un motore a combustione interna. |
| WO1998058172A1 (de) * | 1997-06-17 | 1998-12-23 | Mannesmann Rexroth Ag | Radialkolbenpumpe |
| DE19729788A1 (de) * | 1997-07-11 | 1999-01-14 | Bosch Gmbh Robert | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
| AT410246B (de) * | 1999-06-25 | 2003-03-25 | Hoerbiger Hydraulik | Radialkolbenpumpe |
| CN1497173A (zh) * | 2002-10-08 | 2004-05-19 | 株式会社小松制作所 | 径向流体机械 |
| WO2010138509A1 (en) * | 2009-05-26 | 2010-12-02 | Husco International, Inc. | Compact eccentric radial piston hydraulic machine |
| US20140202325A1 (en) * | 2010-05-25 | 2014-07-24 | Husco International, Inc. | Compact Radial Piston Hydraulic Machine Having a Cylinder Block with Deforming Regions |
| AT512407B1 (de) | 2012-09-14 | 2013-08-15 | Hoerbiger Kompressortech Hold | Hohle Ventilplatte |
-
2021
- 2021-05-10 DE DE102021204715.7A patent/DE102021204715A1/de active Pending
-
2022
- 2022-04-29 US US18/289,367 patent/US20240240633A1/en active Pending
- 2022-04-29 WO PCT/EP2022/061488 patent/WO2022238150A1/de not_active Ceased
- 2022-04-29 EP EP22726636.8A patent/EP4337859B1/de active Active
- 2022-04-29 CN CN202280034014.8A patent/CN117425777A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022238150A1 (de) | 2022-11-17 |
| US20240240633A1 (en) | 2024-07-18 |
| CN117425777A (zh) | 2024-01-19 |
| EP4337859B1 (de) | 2025-10-08 |
| DE102021204715A1 (de) | 2022-11-10 |
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