EP4337859B1 - Pompe à pistons radiaux et procédé de fabrication d'une pompe à pistons radiaux - Google Patents

Pompe à pistons radiaux et procédé de fabrication d'une pompe à pistons radiaux

Info

Publication number
EP4337859B1
EP4337859B1 EP22726636.8A EP22726636A EP4337859B1 EP 4337859 B1 EP4337859 B1 EP 4337859B1 EP 22726636 A EP22726636 A EP 22726636A EP 4337859 B1 EP4337859 B1 EP 4337859B1
Authority
EP
European Patent Office
Prior art keywords
cover
radial piston
piston pump
pump according
cylinder bore
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.)
Active
Application number
EP22726636.8A
Other languages
German (de)
English (en)
Other versions
EP4337859A1 (fr
Inventor
Ulf MÜLLER
Tim Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
Thyssenkrupp Dynamic Components GmbH
Original Assignee
ThyssenKrupp AG
Thyssenkrupp Dynamic Components GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp AG, Thyssenkrupp Dynamic Components GmbH filed Critical ThyssenKrupp AG
Publication of EP4337859A1 publication Critical patent/EP4337859A1/fr
Application granted granted Critical
Publication of EP4337859B1 publication Critical patent/EP4337859B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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

  • a radial piston pump is a component of fluid technology.
  • the piston-working chamber combinations are arranged radially and perpendicular to the drive shaft, unlike an axial piston compressor.
  • the delivery or reciprocating movement of each individual working piston is caused by an eccentric located on the drive shaft.
  • the radial piston pump comprises several piston-working chamber combinations that extend radially from the drive shaft in a star-shaped pattern.
  • the radial piston pump pumps a fluid from a low-pressure chamber to a high-pressure chamber.
  • the valves for the gas exchange process in the radial piston pump described here are arranged as follows.
  • the inlet valves are arranged radially with respect to the rotational axis of the eccentric shaft, i.e., near the head end of the respective piston.
  • the outlet valves are arranged axially, which offers advantages in terms of installation space and increases design freedom for the inlet valves. For example, a larger valve diameter, greater bending length, possibly multiple inlet valves, etc., can be realized.
  • a minimum wall thickness is required in the cylinder housing, especially between the cover seat and the contact surface of the exhaust valve in the high-pressure channel. Due to the axial arrangement of the exhaust valve plate, an additional “non-compressible volume” is created by the piston movement, the so-called “dead volume/damage volume” across the width of the cylinder housing up to the exhaust valve and thus to the exhaust channel.
  • the dead volume is determined by its cross-sectional area x channel length. The aim is to keep this dead volume as small as possible, as it impairs the compressor's efficiency.
  • the exhaust port (the cavity that forms a flow-side connection between the compression chamber and the high-pressure port) is located as high as possible in the cylinder chamber, close to the cylinder head face.
  • the outlet surface of the exhaust port (in the high-pressure chamber) is closed by the exhaust valve plate, which protrudes beyond the outlet surface of the exhaust port (overhang), thus sealing the port axially.
  • a radial piston pump comprising a drive shaft with an eccentric, and at least one piston-working chamber combination, wherein the piston-working chamber combination comprises a cylinder bore and a piston, wherein the cylinder bore has a fluid outlet channel, wherein the cylinder bore is closed with a cover, wherein the cover is received in a cover receiving bore, wherein the cylinder bore has a longitudinal axis and the cover receiving bore has a longitudinal axis.
  • this object is achieved by 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 displaced parallel, the disadvantages outlined above are overcome, or at least reduced. In particular, this results in a reduced Dead volume is reduced by shortening the length of the exhaust port. Nevertheless, a sufficient axial contact surface remains for the cover assembly. Furthermore, it provides the option of positioning securing elements in the cover contact surface, particularly due to the offset of the pre-assembled "inlet valve cover” assembly. Furthermore, the use of simple geometric functional elements, particularly circular bores, enables simple and reliable sealing, and reduces costs.
  • the cover receiving bore is arranged eccentrically to the cylinder bore.
  • the longitudinal axis of the cylinder bore is shifted toward the fluid outlet channel or away from the fluid outlet channel with respect to the longitudinal axis of the cover receiving bore.
  • the fluid outlet channel can be advantageously shortened and thus the dead volume can be advantageously reduced.
  • a shoulder can be provided between the cylinder bore and the cover receiving bore, which, at least indirectly, forms the support surface for an edge region of the cover.
  • an intake valve in particular in the form of a spring-loaded valve, can be placed on such a shoulder.
  • the intake 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. This can, for example, essentially create a completely circumferential shoulder.
  • the fluid inlet channel can be provided in the cover or the piston.
  • the fluid inlet channel can be provided in the cover or the piston.
  • the inlet valve in particular an inlet valve designed as a spring-loaded valve, rests on the shoulder.
  • the inlet valve can be arranged between the cover and the shoulder and, as will be explained below, can be connected to the cover in advance.
  • the inlet valve can be secured to the cover by means of a securing element, in particular a grooved nail. This ensures convenient assembly and disassembly, as the cover and inlet valve form a single assembly unit.
  • the securing elements can be arranged between the cover and the shoulder. Accordingly, the securing elements are located outside the cylinder bore, and there is fundamentally no risk of the securing elements accidentally entering the piston's working chamber, i.e., the cylinder bore.
  • recesses can be provided in the shoulder for partially accommodating the securing elements, in particular the grooved nails.
  • the securing elements can be partially inserted into these recesses, which represents an additional safety measure to prevent the securing elements from accidentally entering the work area.
  • this object is achieved by a method having the characterizing features of claim 16.
  • the piston-working chamber combination 2 essentially comprises a cylinder bore 21 and a piston 22.
  • the cylinder bore 21 is closed at the head end with a cover 23.
  • 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 circularly cylindrical. Accordingly, the cylinder bore 21 has an axis of symmetry or longitudinal axis 211 in the direction of piston movement.
  • the cover(s) 23, 23a, ... are fixed here, for example, by means of a retaining ring 5 on the pump base body 3 or above the cylinder bore(s) 21.
  • any other suitable fastening method such as screwing or a housing-integrated retaining ring, is also possible.
  • the housing 4 engages over 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, for example, in the piston 22.
  • the fluid inlet channel 241 is preferably arranged radially.
  • the cover 23 is preferably circular in shape.
  • the cover 23 is received in a corresponding, preferably also 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 accordingly has an axis of symmetry or longitudinal axis 271. In view of the manufacturing costs and the functional requirement of the tightness of the cover 23 to the cylinder bore 21 or to the pump base body 3, 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 a shoulder 31 is formed between the two bores.
  • This shoulder serves, at least indirectly, as a support surface 31 for the cover 23.
  • an inlet valve 24, preferably designed as a spring-loaded valve initially rests on the shoulder 31, and the cover 23 with the fluid inlet channel then rests on the spring-loaded valve 24.
  • 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 through the fluid inlet channel 241 or the inlet valve 24 into the cylinder bore 21, where it is
  • the piston 22 compresses the fluid during the stroke movement and exits the cylinder bore 21 through the exhaust valve 25 or the fluid outlet channel 251.
  • the design of the valves for example, as a spring-loaded valve, is well known to those skilled in the art and requires no further explanation here.
  • Various design options or variations, in particular the number, of inlet/outlet valves are also conceivable, especially per piston-working chamber combination 2.
  • 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 displaced parallel to the longitudinal axis 211 of the cylinder bore 21 or that the cover receiving bore 27 is arranged eccentrically to the cylinder bore 21.
  • the cover 23 is also displaced 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 with respect to the longitudinal axis 271 of the cover receiving bore 27 in the direction or opposite to the direction of the fluid outlet channel 251.
  • the fluid outlet channel 251 can be adapted, in particular shortened, as can be determined in particular by comparing the Fig. 3 and 4 can be seen.
  • the support on the side facing away from the HP port is larger, thus the cover is shifted away from the HP area.
  • the relative displacement of the intake area in the cover relative to the cylinder is shown. The version "away from the HP area" is preferred.
  • the Fig. 4 also shows a section of a radial piston compressor with axially aligned outlet channel 251. The position of piston 1 is shown in the partial stroke.
  • the "cover assembly” is preferably mounted on the pump body 3 in an “overhead” assembly for the inlet valve 24. Therefore, it is advantageous if the inlet valve 24 is secured to the cover 23 in a pre-assembly step to prevent it from becoming lost.
  • at least one securing element hereinafter referred to as grooved nails 6—can be provided, which should be arranged in such a way that loosening during operation either cannot occur or does not negatively affect the function of the radial piston pump.
  • the assembly method may also include the assembly of the seal 26 to the cover (O-ring).
  • the securing elements in particular the grooved nails, are accommodated in sections in recesses 311 of the paragraph 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (17)

  1. Pompe à pistons radiaux, en particulier compresseur à pistons radiaux, comprenant
    - un arbre d'entraînement (1) avec un excentrique (11), ainsi qu'au moins une combinaison piston-chambre de travail (2), la combinaison piston-chambre de travail (2) comprenant un alésage cylindrique (21) et un piston (22),
    - l'alésage cylindrique (21) présente un canal de sortie de fluide (251),
    - l'alésage cylindrique (21) est fermé par un couvercle (23),
    - le couvercle (23) est logé dans un alésage de réception de couvercle (27),
    - l'alésage cylindrique (21) présente un axe longitudinal (211) et l'alésage de réception du couvercle (27) présente un axe longitudinal (271),
    caractérisée en ce que
    l'axe longitudinal (211) de l'alésage cylindrique (21) et l'axe longitudinal (271) de l'alésage de réception du couvercle (27) ne coïncident pas.
  2. Pompe à pistons radiaux selon la revendication 1 ou le préambule de la revendication 1, caractérisée en ce que l'alésage de réception du couvercle (27) est disposé de manière excentrique par rapport à l'alésage cylindrique (21).
  3. Pompe à piston radial selon au moins l'une des revendications précédentes, caractérisée en ce que l'axe longitudinal (211) de l'alésage cylindrique (21) et l'axe longitudinal (271) de l'alésage de réception du couvercle (27) sont décalés parallèlement.
  4. Pompe à piston radial selon au moins l'une des revendications précédentes, caractérisée en ce que l'axe longitudinal (211) de l'alésage cylindrique (21) est décalé par rapport à l'axe longitudinal (271) de l'alésage de réception du couvercle (27) dans la direction du canal de sortie de fluide (251) ou à l'opposé du canal de sortie de fluide (251).
  5. Pompe à pistons radiaux selon au moins l'une des revendications précédentes, caractérisée en ce qu'un épaulement (31) est prévu entre l'alésage cylindrique (21) et l'alésage de réception du couvercle (27), lequel épaulement forme, au moins indirectement, la surface d'appui pour une zone de bordure du couvercle (23).
  6. Pompe à pistons radiaux selon au moins l'une des revendications précédentes, caractérisée en ce que l'alésage du cylindre (21) et l'alésage de réception du couvercle (27) ont des diamètres différents.
  7. Pompe à piston radial selon la revendication 6, caractérisée en ce que l'alésage de réception du couvercle (27) présente un diamètre supérieur à celui de l'alésage cylindrique (21).
  8. Pompe à pistons radiaux selon au moins l'une des revendications précédentes, caractérisée en ce que la combinaison piston-chambre de travail (2) présente un canal d'entrée de fluide (241) avec une soupape d'entrée (24) et le canal de sortie de fluide (251) avec une soupape de sortie (25).
  9. Pompe à pistons radiaux selon la revendication 8, caractérisée en ce que le canal d'entrée de fluide (241) est orienté radialement par rapport à l'arbre d'entraînement et le canal de sortie de fluide (251) est orienté axialement.
  10. Pompe à pistons radiaux selon au moins l'une des revendications précédentes 8 ou 9, caractérisée en ce que le canal d'entrée de fluide (241) est prévu dans le couvercle (23) ou le piston (22).
  11. Pompe à pistons radiaux selon au moins l'une des revendications précédentes 8 à 10, caractérisée en ce que la soupape d'admission conçue comme une soupape à lamelle repose sur le talon (31).
  12. Pompe à pistons radiaux selon au moins l'une des revendications précédentes 8 à 11, caractérisée en ce que la soupape d'admission (24) est fixée au couvercle (23) au moyen d'au moins un élément de fixation (6).
  13. Pompe à pistons radiaux selon la revendication 12, caractérisée en ce que l'élément de fixation est un clou cranté.
  14. Pompe à pistons radiaux selon la revendication 12, lorsqu'elle dépend de la revendication 5, ou selon la revendication 13, caractérisée en ce que le au moins un élément de fixation (6) est disposé entre le couvercle (23) et le talon (31).
  15. Pompe à pistons radiaux selon la revendication 12, lorsqu'elle dépend de la revendication 5, ou selon la revendication 13 ou 14, caractérisée en ce qu'au moins un évidement (311) est prévu dans le talon (31) pour recevoir partiellement le au moins un élément de fixation (6) dans le talon (31).
  16. Procédé de montage d'une pompe à pistons radiaux selon au moins l'une des revendications précédentes, comprenant une soupape d'admission (24), de préférence une soupape à lamelle, et un couvercle (23) avec un canal d'admission de fluide (241), ainsi qu'un épaulement (31) prévu entre l'alésage du cylindre (21) et l'alésage de réception du couvercle (27), caractérisé par les étapes suivantes :
    - pose de la soupape d'admission (24) sur le couvercle (23) ;
    - fixation de la soupape d'admission (24) sur le couvercle (23) à l'aide d'au moins un élément de fixation (6), de préférence à l'aide d'un clou cranté ;
    - pose du couvercle (23) avec le côté soupape sur le décrochement (31), l'au moins un élément de fixation (6) étant disposé entre le couvercle (23) et le décrochement (31) ;
    - Fixation du couvercle (23) dans l'alésage de réception du couvercle (27).
  17. Procédé de montage d'une pompe à pistons radiaux selon la revendication 16, caractérisé en ce que le au moins un élément de fixation (6) est logé par sections dans au moins un évidement (311) du rebord (31).
EP22726636.8A 2021-05-10 2022-04-29 Pompe à pistons radiaux et procédé de fabrication d'une pompe à pistons radiaux Active EP4337859B1 (fr)

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 (fr) 2021-05-10 2022-04-29 Pompe à pistons radiaux et procédé de fabrication d'une pompe à pistons radiaux

Publications (2)

Publication Number Publication Date
EP4337859A1 EP4337859A1 (fr) 2024-03-20
EP4337859B1 true EP4337859B1 (fr) 2025-10-08

Family

ID=81854596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22726636.8A Active EP4337859B1 (fr) 2021-05-10 2022-04-29 Pompe à pistons radiaux et procédé de fabrication d'une pompe à pistons radiaux

Country Status (5)

Country Link
US (1) US20240240633A1 (fr)
EP (1) EP4337859B1 (fr)
CN (1) CN117425777A (fr)
DE (1) DE102021204715A1 (fr)
WO (1) WO2022238150A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5571243A (en) * 1994-01-15 1996-11-05 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile Per Azioni Pump device for supplying fuel from a tank to an internal combustion engine

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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
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 (fr) * 1997-06-17 1998-12-23 Mannesmann Rexroth Ag Pompe a pistons radiaux
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 (fr) * 2009-05-26 2010-12-02 Husco International, Inc. Machine hydraulique compacte à piston radial excentré
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5571243A (en) * 1994-01-15 1996-11-05 Elasis Sistema Ricerca Fiat Nel Mezzogiorno Societa Consortile Per Azioni Pump device for supplying fuel from a tank to an internal combustion engine

Also Published As

Publication number Publication date
WO2022238150A1 (fr) 2022-11-17
US20240240633A1 (en) 2024-07-18
EP4337859A1 (fr) 2024-03-20
CN117425777A (zh) 2024-01-19
DE102021204715A1 (de) 2022-11-10

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