EP0128787B1 - One cylinder or multicylinder radial pump - Google Patents

One cylinder or multicylinder radial pump Download PDF

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Publication number
EP0128787B1
EP0128787B1 EP84400928A EP84400928A EP0128787B1 EP 0128787 B1 EP0128787 B1 EP 0128787B1 EP 84400928 A EP84400928 A EP 84400928A EP 84400928 A EP84400928 A EP 84400928A EP 0128787 B1 EP0128787 B1 EP 0128787B1
Authority
EP
European Patent Office
Prior art keywords
valve
bore
pump
piston
seat
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.)
Expired
Application number
EP84400928A
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German (de)
French (fr)
Other versions
EP0128787A1 (en
Inventor
Jean Claude Maillochaud
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0128787A1 publication Critical patent/EP0128787A1/en
Application granted granted Critical
Publication of EP0128787B1 publication Critical patent/EP0128787B1/en
Expired legal-status Critical Current

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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
    • F04B53/102—Disc valves
    • F04B53/1035—Disc valves with means for limiting the opening height
    • 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
    • F04B53/102—Disc valves
    • F04B53/1032—Spring-actuated disc valves

Definitions

  • the present invention relates to a radial pump comprising a body in which is rotatably mounted a shaft carrying at least one eccentric or a control cam, at least one piston mounted to slide relative to the body and subjected to the action of elastic means tending to apply it on the eccentric, and a delivery device comprising a valve seat, a valve biased towards its seat by elastic means, a valve cage and an outlet connector plug.
  • It relates to a pump of this kind in which it is easy to replace defective parts and which, when it is multicylindrical, can easily be adapted to the needs of use, which makes it possible to manufacture it in large series, at a reduced cost price.
  • the pump according to the invention is characterized in that the piston is slidably mounted in a bore machined directly in the pump body, and in that this bore is extended by a second bore of larger diameter in which the device is arranged. discharge, the latter being held in position against the elastic means of the piston by the plug-connector which is tightly fixed in this second bore.
  • the pump body has a series of holes in each of which can be mounted a piston, elastic return means and a delivery device, and each of the delivery devices communicates, downstream of the valve. , with a conduit opening into a chamber common to all of the delivery devices.
  • each of the delivery devices communicates, downstream of the valve. , with a conduit opening into a chamber common to all of the delivery devices.
  • the different cylinder-piston assemblies work in parallel and discharge the liquid to the remaining fittings. It is also possible, if desired, to remove bores provided with a simple plug, the piston, its return means and the corresponding delivery device.
  • the pump according to the invention comprises a body 1 in which is rotatably mounted a shaft 2 carrying an eccentric 3. On this are mounted a ring 4 and a ring wear 5 held by two washers 6.
  • the shaft 2 rests in two plain bearings 7 and 8 mounted one directly in the body 1, the other in a ring 9 forming a spacer.
  • This piston is constituted by a blind tube, the closed face of which is held in abutment against the eccentric 3 by a spring 14. Its cylindrical face has holes 15, uncovered or not depending on the position of the piston and adapted to put the chamber 10 in communication with the inside of the piston.
  • the bore 12 is extended by a bore 16 of greater diameter to which it is connected by a shoulder 17 and which forms a housing for the delivery device of the pump.
  • This delivery device comprises a valve seat 18, made of sintered steel, which bears on the shoulder 17 and serves as a stop for the spring 14.
  • This seat has a diameter smaller than that of the bore 16 so that an annular chamber 19 is formed around the seat. It has a central bore 20 which can be closed off by a valve 21 and lateral grooves 22 connecting the discharge of the pump to the annular chamber 19.
  • the valve 21 is movable inside a chamber 23 formed in a valve cage 24 made of sintered steel.
  • the latter has a central bore 25 which extends the chamber 23 and could be blind, but is open in the embodiment shown; this bore contains a spring 26 tending to apply the valve 21 to its seat 18 and has a smaller diameter than the chamber 23 to which it is connected by a shoulder 32.
  • the valve cage 24 has lower grooves 27, lateral 28 and superior 29.
  • valve seat 18 and the valve cage 24 are held in the bore 16 by a connector plug 30 which is screwed into the body 1 and on which the spring 26 is supported.
  • This plug has an outlet hole 31 and is extended at its part facing the delivery device by a blind ring 30a whose internal diameter is adjusted to keep the seat 18 and its cage 24 in place while its external diameter is adjusted to tightly crush an O-ring 33 which seals the discharge.
  • imprints can be printed on the ring 30a, so that the plug 30, the valve cage 24, the valve seat 18, the valve 21 and the spring 26 constitute a modular assembly.
  • the liquid located in the chamber 10 passes inside the piston 13 through its holes 15, when this piston is in the low position.
  • the piston is then pushed back by the eccentric 3, the liquid is trapped inside the piston and discharged by the latter. It pushes back the valve 21, which is applied to the shoulder 32 by closing off the bore 25, and flows towards the outlet hole 31 through the grooves 27, 28 and 29.
  • Figure 4 shows another embodiment in which the pump is multicylindrical.
  • the body 1 comprises several radial bores 12 in each of which is slidably mounted a piston 13 and to each of which is associated a delivery device maintained by a plug-connector 30 with its blind ring 30a.
  • the body has conduits 34 which put the chambers 19 in communication with the same annular chamber 35 coaxial with the shaft 2.
  • the various outlets of the pump are also interconnected.

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

Description

La présente invention concerne une pompe radiale comprenant un corps dans lequel est monté à rotation un arbre portant au moins un excentrique ou une came de commande, au moins un piston monté coulissant par rapport au corps et soumis à l'action de moyens élastiques tendant à l'appliquer sur l'excentrique, et un dispositif de refoulement comportant un siège de clapet, un clapet sollicité vers son siège par des moyens élastiques, une cage de clapet et un bouchon-raccord de sortie.The present invention relates to a radial pump comprising a body in which is rotatably mounted a shaft carrying at least one eccentric or a control cam, at least one piston mounted to slide relative to the body and subjected to the action of elastic means tending to apply it on the eccentric, and a delivery device comprising a valve seat, a valve biased towards its seat by elastic means, a valve cage and an outlet connector plug.

Une pompe de ce genre est décrite dans le document FR-A-1 402 284.A pump of this kind is described in document FR-A-1 402 284.

Elle a pour objet une pompe de ce genre dans laquelle il est facile de remplacer les pièces défectueuses et qui, lorsqu'elle est multicylindrique, peut facilement être adaptée aux besoins d'utilisation, ce qui permet de la fabriquer en grande série, à un prix de revient réduit.It relates to a pump of this kind in which it is easy to replace defective parts and which, when it is multicylindrical, can easily be adapted to the needs of use, which makes it possible to manufacture it in large series, at a reduced cost price.

La pompe selon l'invention est caractérisée en ce que le piston est monté coulissant dans un perçage usiné directement dans le corps de pompe, et en ce que ce perçage est prolongé par un deuxième perçage de diamètre plus grand dans lequel est disposé le dispositif de refoulement, celui-ci étant maintenu en position à l'encontre des moyens élastiques du piston par le bouchon-raccord qui est fixé de manière étanche dans ce deuxième perçage.The pump according to the invention is characterized in that the piston is slidably mounted in a bore machined directly in the pump body, and in that this bore is extended by a second bore of larger diameter in which the device is arranged. discharge, the latter being held in position against the elastic means of the piston by the plug-connector which is tightly fixed in this second bore.

Dans le cas d'une pompe multicylindrique, le corps de pompe comporte une série de perçages dans chacun desquels peut être monté un piston, des moyens élastiques de rappel et un dispositif de refoulement, et chacun des dispositifs de refoulement communique, en aval du clapet, avec un conduit débouchant dans une chambre commune à l'ensemble des dispositifs de refoulement. Dans ces conditions, il est possible de remplacer les bouchons-raccords, à l'exception d'un seul, par de simples bouchons. Les différents ensembles cylindre-piston travaillent en parallèle et refoulent le liquide vers les raccords restants. Il est également possible, si on le désire, de retirer des perçages munis d'un simple bouchon, le piston, ses moyens de rappel et le dispositif de refoulement correspondant.In the case of a multi-cylinder pump, the pump body has a series of holes in each of which can be mounted a piston, elastic return means and a delivery device, and each of the delivery devices communicates, downstream of the valve. , with a conduit opening into a chamber common to all of the delivery devices. Under these conditions, it is possible to replace the plugs, with the exception of one, with simple plugs. The different cylinder-piston assemblies work in parallel and discharge the liquid to the remaining fittings. It is also possible, if desired, to remove bores provided with a simple plug, the piston, its return means and the corresponding delivery device.

On a décrit ci-après, à titre d'exemples non limitatifs, deux modes de réalisation de la pompe selon l'invention, avec référence au dessin annexé dans lequel:

  • La Figure 1 est une vue en coupe axiale d'une pompe monocylindrique;
  • La Figure 2 représente le clapet de refoulement de la pompe vu par en dessous;
  • La Figure 3 est une vue en plan de la cage de clapet;
  • La Figure 4 est une vue en élévation, avec coupe partielle, d'une pompe multicylindrique.
Two embodiments of the pump according to the invention have been described below, by way of non-limiting examples, with reference to the appended drawing in which:
  • Figure 1 is an axial sectional view of a single cylinder pump;
  • Figure 2 shows the pump discharge valve seen from below;
  • Figure 3 is a plan view of the valve cage;
  • Figure 4 is an elevational view, partly in section, of a multi-cylinder pump.

Telle qu'elle est représentée aux Figures 1 à 3, la pompe selon l'invention comprend un corps 1 dans lequel est monté à rotation un arbre 2 portant un excentrique 3. Sur celui-si sont montées une bague 4 et une bague d'usure 5 maintenues par deux rondelles 6. L'arbre 2 repose dans deux paliers lisses 7 et 8 montés l'un directement dans le corps 1, l'autre dans une bague 9 formant entretoise.As shown in Figures 1 to 3, the pump according to the invention comprises a body 1 in which is rotatably mounted a shaft 2 carrying an eccentric 3. On this are mounted a ring 4 and a ring wear 5 held by two washers 6. The shaft 2 rests in two plain bearings 7 and 8 mounted one directly in the body 1, the other in a ring 9 forming a spacer.

Dans la chambre 10 qui entoure l'excentrique 3 débouchent d'une part un conduit d'admission 11 et d'autre par un perçage radial 12 qui est ménagé en regard de l'excentrique et dans lequel est monté coulissant 'un piston 13. Ce piston est constitué par un tube borgne dont la face fermée est maintenue en appui contre l'excentrique 3 par un ressort 14. Sa face cylindrique comporte des trous 15 découverts ou non suivant la position du piston et propres à mettre la chambre 10 en communication avec l'intérieur du piston.In the chamber 10 which surrounds the eccentric 3 open on the one hand an inlet duct 11 and on the other by a radial bore 12 which is formed opposite the eccentric and in which a piston 13 is slidably mounted. This piston is constituted by a blind tube, the closed face of which is held in abutment against the eccentric 3 by a spring 14. Its cylindrical face has holes 15, uncovered or not depending on the position of the piston and adapted to put the chamber 10 in communication with the inside of the piston.

Le perçage 12 est prolongé par un perçage 16 de diamètre supérieur auquel il se raccorde par un épaulement 17 et qui forme logement pour le dispositif de refoulement de la pompe.The bore 12 is extended by a bore 16 of greater diameter to which it is connected by a shoulder 17 and which forms a housing for the delivery device of the pump.

Ce dispositif de refoulement comprend un siège de clapet 18, en acier fritté, qui prend appui sur l'épaulement 17 et sert de butée au ressort 14. Ce siège a une diamètre inférieur à celui du perçage 16 de sorte qu'une chambre annulaire 19 est formée autour du siège. Il présente un perçage central 20 pouvant être obturé par un clapet 21 et des rainures latérales 22 reliant le refoulement de la pompe à la chambre annulaire 19.This delivery device comprises a valve seat 18, made of sintered steel, which bears on the shoulder 17 and serves as a stop for the spring 14. This seat has a diameter smaller than that of the bore 16 so that an annular chamber 19 is formed around the seat. It has a central bore 20 which can be closed off by a valve 21 and lateral grooves 22 connecting the discharge of the pump to the annular chamber 19.

Le clapet 21 est mobile à l'intérieur d'une chambre 23 ménagée dans une cage de clapet 24 en acier fritté. Cette dernière comporte un perçage central 25 qui prolonge la chambre 23 et pourraît être borgne, mais est ouvert dans l'exemple de réalisation représenté; ce perçage contient un ressort 26 tendant à appliquer le clapet 21 sur son siège 18 et a un diamètre plus faible que la chambre 23 à laquelle il est reliée par un épaulement 32. La cage de clapet 24 présente des rainures inférieures 27, latérales 28 et supérieures 29.The valve 21 is movable inside a chamber 23 formed in a valve cage 24 made of sintered steel. The latter has a central bore 25 which extends the chamber 23 and could be blind, but is open in the embodiment shown; this bore contains a spring 26 tending to apply the valve 21 to its seat 18 and has a smaller diameter than the chamber 23 to which it is connected by a shoulder 32. The valve cage 24 has lower grooves 27, lateral 28 and superior 29.

Le siège de clapet 18 et la cage de clapet 24 sont maintenus dans le perçage 16 par un bouchon-raccord 30 qui est vissé dans le corps 1 et sur lequel le ressort 26 prend appui. Ce bouchon présente un perçage de sortie 31 et est prolongé à sa partie tournée vers le dispositif de refoulement par un anneau borgne 30a dont le diamètre intérieur est adjusté pour maintenir en place le siège 18 et sa cage 24 alors que son diamètre extérieur est adjusté pour écraser de manière étanche un joint torique 33 qui assure l'étanchéité du refoulement. Pour faciliter les montages et démontages de l'ensemble de refoulement, on peut imprimer des empreintes à l'anneau 30a, de telle sorte que le bouchon 30, la cage de clapet 24, le siège de clapet 18, le clapet 21 et le ressort 26 constituent un ensemble modulaire.The valve seat 18 and the valve cage 24 are held in the bore 16 by a connector plug 30 which is screwed into the body 1 and on which the spring 26 is supported. This plug has an outlet hole 31 and is extended at its part facing the delivery device by a blind ring 30a whose internal diameter is adjusted to keep the seat 18 and its cage 24 in place while its external diameter is adjusted to tightly crush an O-ring 33 which seals the discharge. To facilitate mounting and dismounting of the discharge assembly, imprints can be printed on the ring 30a, so that the plug 30, the valve cage 24, the valve seat 18, the valve 21 and the spring 26 constitute a modular assembly.

En fonctionnement, le liquide se trouvant dans la chambre 10 passe à l'intérieure du piston 13 par ses perçages 15, quand ce piston se trouve en position basse. Quand le piston est ensuite repoussé par l'excentrique 3, le liquide est emprisonné à l'intérieur du piston et refoulé par ce dernier. Il repousse le clapet 21, qui vient s'appliquer sur l'épaulement 32 en obturant le perçage 25, et s'écoule vers le perçage de sortie 31 par les rainures 27, 28 et 29.In operation, the liquid located in the chamber 10 passes inside the piston 13 through its holes 15, when this piston is in the low position. When the piston is then pushed back by the eccentric 3, the liquid is trapped inside the piston and discharged by the latter. It pushes back the valve 21, which is applied to the shoulder 32 by closing off the bore 25, and flows towards the outlet hole 31 through the grooves 27, 28 and 29.

La Figure 4 montre un autre mode de réalisation dans lequel la pompe est multicylindrique. Dans ce cas, le corps 1 comporte plusieurs perçages radiaux 12 dans chacun desquels est monté coulissant un piston 13 et à chacun desquels est associé un dispositif de refoulement maintenu par un bouchon-raccord 30 avec son anneau borgne 30a. Mais le corps présente des conduits 34 qui mettent les chambres 19 en communication avec une même chambre annulaire 35 coaxiale à l'arbre 2. Les différents refoulements de la pompe sont aussi reliés entre eux. Dans ce cas, il est possible de remplacer un ou plusieurs bouchons-raccords 30 par un bouchon qui obture le perçage 16, en laissant éventuellement en place les pistons 13, les sièges 18 et les cages 24; les différents refoulements de la pompe travaillent en parallèle et refoulent le liquide dans les raccords restants.Figure 4 shows another embodiment in which the pump is multicylindrical. In this case, the body 1 comprises several radial bores 12 in each of which is slidably mounted a piston 13 and to each of which is associated a delivery device maintained by a plug-connector 30 with its blind ring 30a. However, the body has conduits 34 which put the chambers 19 in communication with the same annular chamber 35 coaxial with the shaft 2. The various outlets of the pump are also interconnected. In this case, it is possible to replace one or more plugs-fittings 30 with a plug which closes the bore 16, optionally leaving in place the pistons 13, the seats 18 and the cages 24; the various pump outlets work in parallel and discharge the liquid into the remaining fittings.

Claims (5)

1. A single or multicylinder radial pump including a body (1) in which is rotatably mounted a shaft (2) having at least one excentric or a control cam (3), at least one piston (13) mounted for sliding with respect to the body (1) and subjected to the action of resilient means (14) tending to apply it against the excentric and a discharge device including a valve seat (18), a valve (21) urged towards its seat by resilient means (26), a valve cage (24) and an output connection plug (30), characterized in that the piston (13) is mounted for sliding in a bore (12) formed directly in the pump body (1) and in that this bore (12) is extended by a second bore (16) of larger diameter in which the discharge device is disposed, this latter being held in position against the resilient means (14) of the piston by the connection plug (30) which is sealingly fixed in this second bore (16).
2. Pump as claimed in claim 1, characterized in that the valve cage (24) includes a central through or blind bore (25) having an internal shoulder (32) and ensuring centering of the valve (21) and of its return spring (26).
3. Pump according to one of the preceding claims, characterized in that the valve cage (24) includes passage grooves (27, 28) and (29) respectively in its lower surface, in its lateral surface and in its upper surface.
4. Pump according to one of the preceding claims, characterized in that the valve seat (18) includes lateral grooves (22).
5. Pump according to any one of the preceding claims, characterized in that the connection plug (30) is extended at its portion turned towards the discharge device by a blind ring (30a) providing the sealing and maintaining the seat (18) and its cage (24) in position.
EP84400928A 1983-06-09 1984-05-07 One cylinder or multicylinder radial pump Expired EP0128787B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8309775A FR2547362B1 (en) 1983-06-09 1983-06-09 MONOCYLINDRICAL OR MULTICYLINDRICAL RADIAL PUMP
FR8309775 1983-06-09

Publications (2)

Publication Number Publication Date
EP0128787A1 EP0128787A1 (en) 1984-12-19
EP0128787B1 true EP0128787B1 (en) 1987-10-07

Family

ID=9289738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400928A Expired EP0128787B1 (en) 1983-06-09 1984-05-07 One cylinder or multicylinder radial pump

Country Status (3)

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EP (1) EP0128787B1 (en)
DE (1) DE3466722D1 (en)
FR (1) FR2547362B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4305791C2 (en) * 1993-02-25 2001-12-13 Hydraulik Ring Gmbh Radial piston pump, in particular fuel pump for internal combustion engines
DE102009003052B4 (en) * 2009-05-13 2018-05-03 Robert Bosch Gmbh High-pressure pump, in particular radial piston pump or series piston pump, with a drive cam whose side surface is connected to a bearing disc

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1402284A (en) * 1964-07-08 1965-06-11 Robert Bopsch G M B H Pump fitted with a pressure adjustment device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH492877A (en) * 1968-03-21 1970-06-30 Nsu Motorenwerke Ag Rotary piston machine
US3473473A (en) * 1968-04-22 1969-10-21 Bendix Corp Pump control means
DE2616435A1 (en) * 1976-04-14 1977-10-27 Fichtel & Sachs Ag RADIAL PISTON PUMP
DE2852882B2 (en) * 1978-12-07 1981-03-12 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Valve, in particular pressure valve for a piston pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1402284A (en) * 1964-07-08 1965-06-11 Robert Bopsch G M B H Pump fitted with a pressure adjustment device

Also Published As

Publication number Publication date
EP0128787A1 (en) 1984-12-19
FR2547362A1 (en) 1984-12-14
DE3466722D1 (en) 1987-11-12
FR2547362B1 (en) 1985-07-26

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