FR2856115A1 - High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure - Google Patents

High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure Download PDF

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Publication number
FR2856115A1
FR2856115A1 FR0307170A FR0307170A FR2856115A1 FR 2856115 A1 FR2856115 A1 FR 2856115A1 FR 0307170 A FR0307170 A FR 0307170A FR 0307170 A FR0307170 A FR 0307170A FR 2856115 A1 FR2856115 A1 FR 2856115A1
Authority
FR
France
Prior art keywords
pump
pump body
pressure oil
low pressure
cylinder
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.)
Withdrawn
Application number
FR0307170A
Other languages
French (fr)
Inventor
Jacques Edouard Flichy
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR0307170A priority Critical patent/FR2856115A1/en
Publication of FR2856115A1 publication Critical patent/FR2856115A1/en
Withdrawn legal-status Critical Current

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
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/02—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00 having movable 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
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/121—Lost-motion device in the driving mechanism
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of 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
    • F04B53/18—Lubricating

Landscapes

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

Abstract

The pump has a piston (4) that moves inside a body of the pump. The piston is mounted in a cylinder (7) fixed against a spring (10) that is placed at a head of the body. A channel (14) is provided external to the body for supplying low pressure oil from the cylinder on all races of the body in order to obtain the pump with null flow on reaching maximum pressure.

Description

AAT

Pompe à haute pression à débit variable.  Variable flow high pressure pump.

1 ) La présente invention concerne une pompe à haute pression à débit variable à structure particulièrement simple.  1) The present invention relates to a variable pressure high pressure pump with a particularly simple structure.

Cette pompe à huile est destinée à fournir une haute pression limitée à une valeur maxima. Quand cette pression a été atteinte, le débit devient nul et il n'y a plus de perte de puissance.  This oil pump is intended to provide a high pressure limited to a maximum value. When this pressure has been reached, the flow becomes zero and there is no more loss of power.

Un accumulateur est de préférence placé à la sortie de la pompe.  An accumulator is preferably placed at the outlet of the pump.

Description.Description.

2 ) Cette pompe est constituée d'un cylindre, dans lequel peut se déplacer un corps de pompe cylindrique mobile sur lequel s'appuie un ressort.  2) This pump consists of a cylinder, in which a movable cylindrical pump body can move on which a spring rests.

Le fond, formant butée, limite la course du corps de pompe et permet un effet d'amortissement hydraulique.  The bottom, forming a stop, limits the stroke of the pump body and allows a hydraulic damping effect.

A l'intérieur du corps de pompe se déplace un piston, entraîné de façon alternative par un excentrique.  A piston moves inside the pump body, alternately driven by an eccentric.

Cet excentrique est constitué d'un anneau, lié au piston par l'intermédiaire 15 d'un axe, qui permet à l'anneau d'osciller par rapport au piston.  This eccentric consists of a ring, linked to the piston by means of an axis, which allows the ring to oscillate relative to the piston.

Un clapet de refoulement est situé dans le corps de pompe.  A discharge valve is located in the pump body.

L'ensemble est alimenté en huile par une pompe à huile à basse pression.  The assembly is supplied with oil by a low pressure oil pump.

A titre d'illustration, un dessin est joint, en coupe transversale de la pompe.(Figure 1) On voit en 1 l'axe d'une portée cylindrique excentrée 2. Cette portée excentrique entraîne un anneau 3 qui est lié au piston 4 par l'intermédiaire d'un axe 5 parallèle à l'axe d'entraînement.  By way of illustration, a drawing is attached, in cross section of the pump. (Figure 1) We see at 1 the axis of an eccentric cylindrical bearing 2. This eccentric bearing causes a ring 3 which is linked to the piston 4 via an axis 5 parallel to the drive axis.

Le piston se déplace dans un corps de pompe cylindrique mobile 6 à l'intérieur d'un cylindre fixe 7 fixé au carter et comprenant un couvercle 8 25 o se trouve le tube de sortie d'huile 9 de la pompe et un ressort 10 qui s'appuie sur le corps de pompe mobile.  The piston moves in a movable cylindrical pump body 6 inside a fixed cylinder 7 fixed to the casing and comprising a cover 8 where the oil outlet tube 9 of the pump is located and a spring 10 which rests on the movable pump body.

Dans ce corps de pompe est placé le clapet de refoulement 11, qui est prolongé par un petit tube 12, qui coulisse dans le tube de sortie d'huile quand le corps de pompe se déplace.  In this pump body is placed the discharge valve 11, which is extended by a small tube 12, which slides in the oil outlet tube when the pump body moves.

Une arrivée d'huile basse pression annulaire 13 est ménagée dans le cylindre fixe.  An annular low pressure oil inlet 13 is provided in the fixed cylinder.

Sur le corps de pompe mobile, une partie cylindrique 14 de plus faible diamètre permet à l'huile d'arriver facilement quelle que soit la position de ce corps de pompe.  On the movable pump body, a cylindrical part 14 of smaller diameter allows the oil to arrive easily whatever the position of this pump body.

Un canal de très faible section 15 permet l'arrivée d'huile au fond du cylindre fixe et ainsi un amortissement hydraulique des mouvements du corps de pompe.  A channel of very small section 15 allows the arrival of oil at the bottom of the fixed cylinder and thus a hydraulic damping of the movements of the pump body.

Fonctionnement.Operation.

Plus la pression de refoulement est grande, plus le corps de pompe écrase le ressort, diminuant ainsi la course utile du piston et donc le débit de la pompe.  The higher the discharge pressure, the more the pump body crushes the spring, thus reducing the useful stroke of the piston and therefore the flow rate of the pump.

A la limite quand la pression est maxima, le débit est nul.  At the limit when the pressure is maximum, the flow is zero.

Au moment de l'aspiration, le corps de pompe, sous l'action de son ressort, 15 tend à revenir vers le piston, mais la partie comprise entre le corps de pompe et le fond s'est remplie d'huile. Cette huile ne peut être chassée brusquement ( effet d'amortissement hydraulique). C'est pourquoi le corps de pompe ne peut se déplacer que lentement. Un accumulateur ( qui peut être incorporé à la pompe) reçoit l'huile refoulée par la pompe et amortit 20 les variations de pression.  At the time of aspiration, the pump body, under the action of its spring, tends to return towards the piston, but the part between the pump body and the bottom is filled with oil. This oil cannot be thrown off suddenly (hydraulic damping effect). This is why the pump body can only move slowly. An accumulator (which can be incorporated into the pump) receives the oil discharged by the pump and absorbs pressure variations.

Intérêt de cet appareil.Interest of this device.

Le rendement de cette pompe doit être excellent, parce qu'il y a peu de perte d'énergie. Il est beaucoup plus simple et économique qu'un conjoncteur-disjoncteur. Il doit très bien convenir pour alimenter le vérin 25 de commande d'un variateur continu de vitesse et son dispositif de serrage hydraulique.  The efficiency of this pump must be excellent, because there is little energy loss. It is much simpler and more economical than a contactor-circuit breaker. It must be very suitable for supplying the actuator 25 for controlling a continuous speed variator and its hydraulic clamping device.

Claims (4)

Revendications.Claims. 1 ) pompe à haute pression du type à piston alternatif, destinée à être alimentée par une pompe à basse pression, caractérisée en ce que le piston (4) est mobile à l'intérieur d'un corps de pompe monté lui-même mobile dans un cylindre fixe (7) à l'encontre d'un ressort (10) disposé en tête du corps de 5 pompe (6), et en ce que le corps de pompe est pourvu extérieurement de canaux (14) permettant son alimentation en huile basse pression à partir du cylindre fixe sur toute la course du corps de pompe, de sorte à obtenir une pompe à débit nul lorsque la pression maximum est atteinte.  1) high pressure pump of the reciprocating piston type, intended to be supplied by a low pressure pump, characterized in that the piston (4) is movable inside a pump body which is itself movable in a fixed cylinder (7) against a spring (10) disposed at the head of the pump body (6), and in that the pump body is provided externally with channels (14) allowing it to be supplied with oil low pressure from the fixed cylinder over the entire stroke of the pump body, so as to obtain a zero flow pump when the maximum pressure is reached. 2 ) pompe selon la revendication 1 caractérisée en ce que le corps mobile de 10 pompe (6) est prolongé en tête, d'un tube de sortie (12) monté coulissant à l'intérieur d'un tube fixe coaxial (2) solidaire du couvercle (8) du cylindre fixe (7) 3 ) pompe selon la revendication 1 caractérisée en ce que la base du corps de 15 pompe mobile est reliée aux canaux extérieurs d'alimentation dudit corps par un canal de très faible section (15), afin de freiner le retour du corps de pompe lors d'une baisse de la pression de sortie.  2) pump according to claim 1 characterized in that the mobile pump body (6) is extended at the head, an outlet tube (12) slidably mounted inside a coaxial fixed tube (2) integral of the cover (8) of the fixed cylinder (7) 3) pump according to claim 1 characterized in that the base of the movable pump body is connected to the external supply channels of said body by a channel of very small section (15) , in order to slow down the return of the pump body when the outlet pressure drops. 4 ) pompe selon l'une quelconque des revendications précédentes caractérisée en ce que le piston est entraîné par un anneau (3), monté sur une portée 20 cylindrique (2) excentrée de l'arbre d'entraînement (1) de la pompe et est relié à cet anneau par une articulation (5) à axe parallèle à celui de l'axe d'entraînement.  4) pump according to any one of the preceding claims, characterized in that the piston is driven by a ring (3), mounted on a cylindrical bearing surface (2) offset from the drive shaft (1) of the pump and is connected to this ring by an articulation (5) with an axis parallel to that of the drive axis. 5 ) application de la pompe selon l'une quelconque des revendications précédentes à un variateur continue de vitesse.  5) application of the pump according to any one of the preceding claims to a continuous variable speed drive.
FR0307170A 2003-06-13 2003-06-13 High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure Withdrawn FR2856115A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0307170A FR2856115A1 (en) 2003-06-13 2003-06-13 High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0307170A FR2856115A1 (en) 2003-06-13 2003-06-13 High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure

Publications (1)

Publication Number Publication Date
FR2856115A1 true FR2856115A1 (en) 2004-12-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR0307170A Withdrawn FR2856115A1 (en) 2003-06-13 2003-06-13 High pressure oil pump for continuous variable speed drive, has channel provided external to body for supplying low pressure oil from cylinder on all races of body in order to obtain pump with null flow on reaching maximum pressure

Country Status (1)

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FR (1) FR2856115A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312169A (en) * 1965-01-18 1967-04-04 Bendix Corp Pump
US3382808A (en) * 1966-06-30 1968-05-14 Bendix Corp Hydraulic pump
DE1928249A1 (en) * 1969-06-03 1971-01-14 Teves Gmbh Alfred Piston engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312169A (en) * 1965-01-18 1967-04-04 Bendix Corp Pump
US3382808A (en) * 1966-06-30 1968-05-14 Bendix Corp Hydraulic pump
DE1928249A1 (en) * 1969-06-03 1971-01-14 Teves Gmbh Alfred Piston engine

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Effective date: 20080229