FR2643116A1 - Hydraulic pump with axial pistons and with a distribution rotor - Google Patents

Hydraulic pump with axial pistons and with a distribution rotor Download PDF

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Publication number
FR2643116A1
FR2643116A1 FR8901863A FR8901863A FR2643116A1 FR 2643116 A1 FR2643116 A1 FR 2643116A1 FR 8901863 A FR8901863 A FR 8901863A FR 8901863 A FR8901863 A FR 8901863A FR 2643116 A1 FR2643116 A1 FR 2643116A1
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France
Prior art keywords
distribution rotor
piston
hydraulic pump
delivery
oil
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Application number
FR8901863A
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French (fr)
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KADJI AMAR
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KADJI AMAR
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Priority to FR8901863A priority Critical patent/FR2643116A1/en
Publication of FR2643116A1 publication Critical patent/FR2643116A1/en
Withdrawn legal-status Critical Current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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders

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

Abstract

The invention relates to a hydraulic pump with axial pistons and with a distribution rotor by virtue of the main element: the distribution rotor 5. This element allows a free suction from the front part of the distribution rotor 5 through the latter which is equipped with a vane which allows intake, forced by means of centrifugal force, in order to ensure correct filling of the cylinders, and constant discharge without surging. No constraint is imposed for using it continuously.

Description

Nous avons constaté lors des réparations opérées sur les pompes hydrauliques de haute pression actuellement en service que les principales pannes ont pour origines:
- Les clapets d'aspiration qui perdent leurs ressorts et font ainsi coincer les clapets de refoulement et
- Aprés un certain temps de fonctionnement les pistons se chauffent par le frottement rapide du rotor,se dilatent et se coincent dans leurs logements, automatiquement les chapeaux de pistons quittent leurs place sont alors broyés par le rotor et me- tent de ce fait la pompe hors a d'usage. We have noticed during the repairs carried out on the high pressure hydraulic pumps currently in service that the main failures have their origins:
- The suction valves which lose their springs and thus cause the discharge valves to jam and
- After a certain operating time the pistons heat up by the rapid friction of the rotor, expand and get stuck in their housings, automatically the caps of pistons leave their places are then crushed by the rotor and thus drive the pump out of use.

- Le rotor qui se chauffe et se dilate,provoque un effort de cisaillement de la goupille d'entraînement. - The rotor which heats up and expands, causes a shearing force on the drive pin.

Les causes de ces échauffements et dilatations sont provo qués par une température trés élevée de l'huile qui stagne à l'interieur du corps de la pompe. Ces échauffements,engendrent une dilatation thérmique des organes ci-dessus cités. The causes of these overheating and expansions are caused by a very high temperature of the oil which stagnates inside the pump body. These overheating generate thermal expansion of the above-mentioned organs.

Notre longue experience dans ce domaine nous a démontré que les défectuosités des organes ci-dessus sont dûes:
a) Au manque de refroidissement de l'huile.Our long experience in this field has shown us that the defects of the above organs are due:
a) Lack of oil cooling.

b) Aux clapets d'aspiration. b) To the suction valves.

Nous avons alors consacré notre étude à la mise au point d'- une navelle pompe qui,avecun fonctionnement analogue à celles qui existent actuellement, ne comportant pas le risque de pannes en question,
Notre pompe équipée d'un cercuit de graissage hydraulique assez large,permet une circulation d'huile dans l'ensemble.We then devoted our study to the development of a navelle pump which, with an operation similar to those which currently exist, not carrying the risk of breakdowns in question,
Our pump, fitted with a fairly wide hydraulic lubrication system, allows oil circulation throughout.

e
Ce système génère un refroidissEent automatique des organes et par cette action maintient la température adéquate et élimine de maniere sûre tout risque d'échauQtment et dilatation thèrmique.e
This system generates an automatic cooling of the organs and by this action maintains the correct temperature and safely eliminates any risk of heating and thermal expansion.

L'aspiration se fait deri-ere et à travers un rotor de distn- bution qui alimente et actionne les pistons. The suction is done behind and through a distribution rotor which feeds and actuates the pistons.

Une meilleure compression et une augmentation du volume d'huile refoulé sont réalisés gràce à l'aube conçue en fin de phase aspiration,avec annulation d'accoups au debit. Better compression and an increase in the volume of pumped oil are achieved thanks to the dawn designed at the end of the aspiration phase, with cancellation of flow-through couplings.

Le trajet du fluide véhiculé de l'avant de la pompe (aspiration) jusqu'à l'arriere de la pompe ( refoulement) favorise un graissage constant et le refroidissement des zones en frottement des éléments (roulement,rotor de distribution, chapeaux pivotant et pistons).  The path of the fluid conveyed from the front of the pump (suction) to the rear of the pump (delivery) promotes constant lubrication and cooling of the friction areas of the elements (bearing, distribution rotor, swivel caps and pistons).

Fig-l:Une vuesmématique en coupe longitudinale d'un mode de réalisation de l'invention. Fig-l: A thematic views in longitudinal section of an embodiment of the invention.

Fig-lA:Une vue partielle illhstrant-le debut de phase aspiration (clapet de refoulement férié)
Fig-2: Une vue partielle illustrant la fin d'admission ( avec clapet de refoulement toujours férmé).Fig-lA: A partial view showing the start of the suction phase (public discharge valve)
Fig-2: A partial view illustrating the end of admission (with discharge valve always closed).

Fig-3: Une vue partielle illustrant la phase refoulement (clapet de refoulement ouvert). Fig-3: A partial view illustrating the discharge phase (discharge valve open).

Fig-4: Une vue schématique partielk du rotor de distribution. Fig-4: A partial schematic view of the distribution rotor.

Fig-1-represente, une pompe hydraulique à pistons axiaux et à rotor de distribution, cette Pompe est constituée par un arbre d'entralnement 1 claveté ou cannellé, portant un rotor de distribution 5.Sur la face arriere 5a sur laquelle prennent appuis une pluralité de pistons creux 9, chaque piston 9 reposant contre la dite face 5a du rotor de distribution 5 par un chapeau pivotant 7. Fig-1-represents, a hydraulic pump with axial pistons and a distribution rotor, this Pump is constituted by a drive shaft 1 keyed or cannellated, carrying a distribution rotor 5. On the rear face 5a on which are supported a plurality of hollow pistons 9, each piston 9 resting against said face 5a of the distribution rotor 5 by a pivoting cap 7.

Chaque piston 9 est maintenu en appui sur son châpeau pivotant 7 par un ressort 8 et se deplace en translation dans les cylindres de la tête hydraulique 11. Les pistons 9 qui sont en admission communiquent par la fente du rotor de distribution 5 avec la chambre d'admission 17a. Sur la face arriere de la tête hydraulique 71 est montée une culasse 1o, la fixant au corps 4 à l'aide de vis 10 sérrant ainsi la tête hydraulique 11. La culasse 16 renferme un clapet de refoulement pour chaque cylindre de piston.Les composants du clapet de refoulement sont:
- Le siège 14, une bille 12,reposant sur le siège 14,actionnée par un ressort de rappel 13.Each piston 9 is held in abutment on its pivoting cap 7 by a spring 8 and moves in translation in the cylinders of the hydraulic head 11. The pistons 9 which are in intake communicate through the slot of the distribution rotor 5 with the chamber d admission 17a. On the rear face of the hydraulic head 71 is mounted a cylinder head 1o, fixing it to the body 4 by means of screws 10 thus tightening the hydraulic head 11. The cylinder head 16 contains a discharge valve for each piston cylinder. of the discharge valve are:
- The seat 14, a ball 12, resting on the seat 14, actuated by a return spring 13.

La culasse 16 comporte aussi le canal d'évacuation (refoulement). The cylinder head 16 also includes the discharge channel (discharge).

Fig-lA représente une vue partielle d'un piston creux 9,étant en début d'admission.L'orifice de la tête du piston 9 communique avec la face du rotor de distribution5 par l'intermédiaire du trou central du chapeau pivotant 7.C'est à cet instant qu'on a le debut admission,le fluide à pomper rempli le piston 9 qui con tinut, son remplissage pendant la rotation sur un angle de 1400. Fig-1A shows a partial view of a hollow piston 9, being at the start of admission. The orifice of the piston head 9 communicates with the face of the distribution rotor 5 via the central hole of the pivoting cap 7. It is at this instant that we have the beginning admission, the fluid to be pumped filled the piston 9 which continues, its filling during the rotation on an angle of 1400.

tent
Les premiers 1000, permet/une admission libre et directe, fente du rotor de distribution 5 et orifice de la tête du piston 9 celà veut dire que sur ces 1000 on a une fente percee de part en part dans le rotor de distroution 5. tent
The first 1000, allows / a free and direct admission, slit of the distribution rotor 5 and orifice of the piston head 9 this means that on these 1000 there is a slit pierced right through in the distroutor rotor 5.

A partir de 100" la fente commence a être borne progréssivement en pente jusqu'à 1400 (fig-4), cette aube de 400 permet de continuer une admission forcée afin'd'assurer le bon remplissage du cylindre en question. From 100 "the slot begins to be progressively sloped until 1400 (fig-4), this blade of 400 allows a forced admission to continue in order to ensure the correct filling of the cylinder in question.

Durant toute cette phase le clapet de refoulement reste ferme. Throughout this phase the discharge valve remains closed.

Fig-2 représente une vue partielle d'un piston 9 (fin d'admission) avec clapet de refoulement toujours fermé. Fig-2 shows a partial view of a piston 9 (end of intake) with discharge valve still closed.

Fig-3 représente une vue partielle d'un piston 9 (phase refoulement) avec clapet de refoulement ouvert. Fig-3 shows a partial view of a piston 9 (delivery phase) with open delivery valve.

A partir de 1400 la tête du piston 9 et le chapeau pivotant7 nt se trouve/en contact avec la surface fermée Sa du rotor de distribu- tion 5 ce qui ferme l'admission. Pendant ce temps le piston 9 fait la course inverse à l'admission et comprime le fluide,ce qui fait augmenter la pression à l'interieur du cylindre jusqu'à une valeur qui pourra vaincre la résistance du ressort 13 du clapet de refoulement et la pression dejà existante, ce qui donne la phase refoulement proprement dite
La rotation et l'inclinaison du rotor de distribution 5:
-Phase admission: le ressort de rappel 8 complètement détendu par sa resistance, assure le contact intime de la tête du piston 9, du chapeau pivotant 7 avec la surface 5a du rotor de distribution 5.From 1400 the piston head 9 and the pivoting cap 7 nt are in contact with the closed surface Sa of the distribution rotor 5 which closes the inlet. During this time, the piston 9 reverses the intake stroke and compresses the fluid, which increases the pressure inside the cylinder to a value which can overcome the resistance of the spring 13 of the discharge valve and the already existing pressure, which gives the actual discharge phase
The rotation and tilt of the distribution rotor 5:
-Phase admission: the return spring 8 completely relaxed by its resistance, ensures intimate contact of the piston head 9, of the pivoting cap 7 with the surface 5a of the distribution rotor 5.

-Phase refoulement:le ressort de rappel 8 comprimé. - Discharge phase: 8 compressed return spring.

Pour avoir un debit constant il est nécéssaire de faire des pompes à six,à.-quatre et à trois pistons, selon le debit desiré pour faire fonctionner le vérin de benne ou autres machines et engins.Avec l'augmentation du nombre de pistons en augmente le debit
Pompe hydraulique à pistons axiaux et a rotor de distributim. To have a constant flow it is necessary to make pumps with six, four and three pistons, according to the desired flow to operate the bucket cylinder or other machines and machines. With the increase in the number of pistons increase the flow
Hydraulic pump with axial pistons and distribution rotor.

Le rotor de distribution 5 est monté avec serrage dans l'arbre 1 dans lesquels passe une goupille de securité 6 devenant ainsi solidaire. La tête hydraulique 11 est munie d'une pluralité de cylindres dans lesquels coulissent les pistons 9 d'une maniere alternative, équipés de chapeaux pivotant 7 en contact avec la surface 5a du rotor de distribution S,le.rappel des pistons,se fait à 1'aide des ressorts 8.La face arriere de la tette hydraulique 11 en contact avec la face de la culasse 16 laquelle est munie de logements de sièges de clapets 14 lesquels sont traversés par les canaux de refoulement. Chaque clapet de refoulement est composé du ressort 13 venant s'appuyer contre le fond de la culasse 16 rassem- blant tout les canaux de refoulement vers le trou central d'évacu ation.Le trou d'évacuation est muni d'un dispositif dans lequel se visse un raccord de depart de refoulement. La culasse 16 est munie de vis 10 permetant d'assembler la tête hydraulique 11 au corps 4 de la pompe. Le corps 4 de la pompe est muni d'un.loge- ment parallele à son axe longitudinal, celui-ci incliné à l'interieur de ce corps 4 dans lequel se visse le tube d' aspiration 15. The distribution rotor 5 is mounted with tightening in the shaft 1 through which a safety pin 6 passes, thus becoming integral. The hydraulic head 11 is provided with a plurality of cylinders in which the pistons 9 slide in an alternative manner, equipped with pivoting caps 7 in contact with the surface 5a of the distribution rotor S, the piston recalls, is done at Using the springs 8. The rear face of the hydraulic head 11 in contact with the face of the cylinder head 16 which is provided with valve seat housings 14 which are traversed by the delivery channels. Each discharge valve is made up of the spring 13 which comes to bear against the bottom of the cylinder head 16 bringing together all the discharge channels towards the central evacuation hole. The evacuation hole is provided with a device in which screws a discharge outlet fitting. The cylinder head 16 is provided with screws 10 allowing the hydraulic head 11 to be assembled to the body 4 of the pump. The body 4 of the pump is provided with a clockwise parallel to its longitudinal axis, the latter inclined inside this body 4 into which the suction tube 15 is screwed.

La face avant du corps 4 entailléed'une collerette, forme le logement du roulement 3 et du joint à lèvres 2. La partie flasquée du corps 4 permet le montage de la pompe axialement à l'aide de quatre points de fixation ( partie avant).The front face of the body 4 notched with a flange, forms the housing for the bearing 3 and the lip seal 2. The flanged part of the body 4 allows the pump to be mounted axially using four fixing points (front part) .

Le rotor de distribution 5 est muni d'une fente(fig-4) permettant un aouble rôle:
- Le premier fait admission.The distribution rotor 5 is provided with a slot (fig-4) allowing an dual role:
- The first admits.

- Le second fait compression. - The second is compression.

Le chapeau 7 débouché et cônique vers la tête sphérique du piston 9 et plat vers la-face 5a du rotor de distribution 5. The cap 7 is open and tapered towards the spherical head of the piston 9 and flat towards the face 5a of the distribution rotor 5.

Le piston 9 est muni d'mye tête sphérique débouchgest en contact permanant avec le chapeau 7, ce dernier en contact permanant avec la face 5a du rotor de distribution i
La pompe fonctionne en sens unique ( gauche ou droite) selon la position de la fente du rotor de distribution 5 (f ig-4). The piston 9 is provided with a spherical debouchgested head in permanent contact with the cap 7, the latter in permanent contact with the face 5a of the distribution rotor i
The pump operates in one direction (left or right) depending on the position of the slot of the distribution rotor 5 (f ig-4).

Claims (4)

REVENDICATIONS 1.Pompe hydraulique à pistons axiaux et à rotor de distribution animé d'un mouvement de va et vient, l'arbre (1) entraine en rotation le rotor de distribution(5), ce dernier transmet par son mouvement de rotation un mouvement de translation au piston (9)dans lequel se loge un ressort de rappel(8).  1. Hydraulic pump with axial pistons and distribution rotor driven back and forth, the shaft (1) rotates the distribution rotor (5), the latter transmits by its rotational movement a movement of translation to the piston (9) in which is housed a return spring (8). 2. Pompe hydraulique selon la revendication 1,la dépression engendrée par le mouvement du piston(9) permet l'aspiration de 1'huile à travers la fente du rotor de distribution (51et l'alimentation en fluide à l'interieur du piston(9). 2. Hydraulic pump according to claim 1, the vacuum generated by the movement of the piston (9) allows the suction of the oil through the slot of the distribution rotor (51 and the fluid supply inside the piston ( 9). 3.Pompe hydraulique selon la revendication 2,lorsque le rotor de distribution(5) poussé par l'intermediaire de son chapeau pivotant (7), une compression de l'huile s'effectue alors à l'interieur du piston (9) et engendre son évacuation dans le logement de la culasse (16) pour son refoulement de départ. 3. Hydraulic pump according to claim 2, when the distribution rotor (5) pushed through its pivoting cap (7), oil compression is then carried out inside the piston (9) and generates its evacuation in the cylinder head housing (16) for its initial delivery. 4.Pompe hydraulique selon l'une quelconque des revendica- tions 1 à 3, durant ces phases(aspiration et refoulement) le clapet de refoulement et d'anti-retour est régulé par la pression elle même pour permettre le refoulement de l'huile, le retour de la bille (12) est assurée par le ressort de rappel (13)permet de nouveau l'aspiration de l'huile à travers la fente du rotor de distribution (5) ce processus se repette cycliquement pour tous les pistons (9) et clapets de refoulement qui fonctionnent en serie pour assurer la continuité du debit, tout les conduits se reunissent au trou central de la culasse (16)pour un refoulement de départ principal, la pompe fonctionne en sens unique (gauche ou droite) selon la po-. 4. Hydraulic pump according to any one of claims 1 to 3, during these phases (suction and delivery) the delivery and non-return valve is regulated by the pressure itself to allow the delivery of the oil , the return of the ball (12) is ensured by the return spring (13) again allows the suction of the oil through the slot of the distribution rotor (5) this process repeats cyclically for all the pistons ( 9) and discharge valves which work in series to ensure the flow continuity, all the conduits meet at the central hole of the cylinder head (16) for a main flow discharge, the pump works in one direction (left or right) according to the po-. sition de la fente du rotor de-distribution (5L, il est à noter que la variation du debit n'est liée qu'à la vitesse de rotation transmise par l'arbre moteur et du nombre de cylindres de pistons. sition of the distribution rotor slot (5L, it should be noted that the variation in the flow rate is only linked to the speed of rotation transmitted by the drive shaft and the number of piston cylinders.
FR8901863A 1989-02-14 1989-02-14 Hydraulic pump with axial pistons and with a distribution rotor Withdrawn FR2643116A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8901863A FR2643116A1 (en) 1989-02-14 1989-02-14 Hydraulic pump with axial pistons and with a distribution rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8901863A FR2643116A1 (en) 1989-02-14 1989-02-14 Hydraulic pump with axial pistons and with a distribution rotor

Publications (1)

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FR2643116A1 true FR2643116A1 (en) 1990-08-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116771624A (en) * 2022-03-17 2023-09-19 刘沐玮 Axial plunger type hydraulic pump for hydraulic return stroke
WO2024134428A1 (en) * 2022-12-21 2024-06-27 Mixtron S.R.L. Piston pump of the type having at least three pumping chambers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1134582A (en) * 1955-10-08 1957-04-15 Boyer Et Cie Ets Hydraulic multiple piston compressor for high pressure
FR1587192A (en) * 1968-10-23 1970-03-13
FR2141457A1 (en) * 1971-06-03 1973-01-26 Leduc Gerard

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1134582A (en) * 1955-10-08 1957-04-15 Boyer Et Cie Ets Hydraulic multiple piston compressor for high pressure
FR1587192A (en) * 1968-10-23 1970-03-13
FR2141457A1 (en) * 1971-06-03 1973-01-26 Leduc Gerard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116771624A (en) * 2022-03-17 2023-09-19 刘沐玮 Axial plunger type hydraulic pump for hydraulic return stroke
WO2024134428A1 (en) * 2022-12-21 2024-06-27 Mixtron S.R.L. Piston pump of the type having at least three pumping chambers

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