EP1167756A1 - Pompe à pistons axiaux du type à axe brisé - Google Patents
Pompe à pistons axiaux du type à axe brisé Download PDFInfo
- Publication number
- EP1167756A1 EP1167756A1 EP01401515A EP01401515A EP1167756A1 EP 1167756 A1 EP1167756 A1 EP 1167756A1 EP 01401515 A EP01401515 A EP 01401515A EP 01401515 A EP01401515 A EP 01401515A EP 1167756 A1 EP1167756 A1 EP 1167756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barrel
- axis
- driver
- rotation
- axial
- 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
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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
- F04B1/20—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 rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2035—Cylinder barrels
Definitions
- the present invention relates to the field of hydraulic pumps, and more particularly pumps with axial pistons of the broken axis type.
- axial piston pumps usually used have a body in which is rotatably mounted along its central axis a barrel with a series of axial holes in each from which slides a piston, the end of which is forced to remain substantially in a fixed plane not perpendicular to the axis of the barrel, causing their reciprocating movement in the holes during the rotation of said barrel.
- the holes with their piston define thus cylinders of variable volume in communication with suction and discharge ports on the pump via a distribution glass fixed mounted in the pump body and cooperating with the axial bearing face of the barrel which opens onto axial holes.
- This distribution glass has two diametrically shaped bean-shaped recesses opposite and respectively connected to the suction port and the discharge port.
- Document FR-A-1 261 358 thus describes a pump barrel, which is not, however, of the broken pin type.
- the barrel of this pump is in two coaxial bodies, rigidly secured by fixing bolts and centering studs.
- the spring ensuring the support of the barrel against the distribution glass is interposed between a shoulder of the lower body and the cap center of a rotating and swinging hat, itself interposed between a central ball joint and spans hemispherical formed on the axial pistons.
- Such arrangement induces high friction preventing high rotation speeds.
- the document FR-A-1 456 563 describes a pump in which the barrel is kept in abutment against the distribution glass by an elastic washer within reach conical bearing against a homologous shoulder provided on the distribution glass support, so with high friction.
- the centering of the barrel is also provided by a central tube integral with the support of the distribution glass. The only coach is function to drive the barrel in rotation, without intervene for the centering of the barrel or for the pressing said barrel against the dispensing glass.
- the structure of such a pump is extremely complex, and involves high friction limiting the regimes Operating.
- Document NL-A-248 888 finally illustrates a pump with broken axis in which the barrel is entrained in rotation by a driver screwed onto the barrel, in being centered on a fixed axis. Support against ice from distribution is ensured by Belleville washers in support against a ring mounted on a central axis secured to the distribution glass support. The only function of the coach again is to train the rotating barrel.
- axial support of the barrel on the distribution glass is obtained in a known manner by a spring bearing in the central area of the plateau, for example by through a central ball integral with the tray, and pushing the barrel against the ice of distribution.
- the spring is therefore installed between two moving parts together, which generates friction slip between the spring and at least one of the parts, causing their wear and the emission of particles polluting the interior of the pump.
- the invention aims to overcome these disadvantages by offering a hydraulic pump to axial pistons of the broken axis type not having the disadvantages and limitations mentioned above.
- a pump comprising a rotating barrel with a cooperating central axis with a distribution glass associated according to a surface of support substantially perpendicular to this axis, said barrel having a plurality of axial holes in which are mounted to slide the pistons correspondents, said pump being remarkable in that that a separate trainer from the barrel is provided for rotate along an essentially coincident axis of rotation with said central axis, said coach ensuring share the centering and the rotational drive of the barrel along said axis of rotation, and on the other hand the support of an elastic means pressing the support surface the barrel against the distribution glass.
- the barrel is free to move axially and angularly under the effect of the spring to compensate for defects alignment of its bearing face on the ice of distribution during rotation. Furthermore, the effort spring thrust is taken up by the coach, thus avoiding soliciting other parts of the pump. In addition, the spring is installed between two substantially stationary parts between them, thus avoiding any sliding friction of the spring on one of the rooms.
- the coach receives the barrel in a hollow part, a bearing coming internally on the centering coach the barrel on the axis of rotation, leaving free the axial sliding of the barrel with respect to the coach.
- the scope is located substantially at axial mid-length of the barrel.
- the centering allows a certain angular displacement of the barrel with respect to the coach.
- the barrel is free to move angularly to stay permanently perfectly plated on the distribution glass.
- connection in rotation of the barrel and the coach is provided by homologous mechanical means in shape correspondence carried by said barrel and coach. It could be a cooperation of two symmetrical lugs come on one of these elements, with homologous cavities made on the other element, or as a variant of a cooperation of grooves coming on one of these items at the staff level with hollow counterparts practiced on the other element.
- the rotational drive thus produced induces a pure couple on the barrel, preserving the freedom of movement of the barrel with respect to the coach.
- the coach has a transverse wall substantially perpendicular to its axis of rotation on an internal face of which is compressed the elastic means of support of the barrel against distribution ice.
- This wall thus counteracts the effort of the means elastic and transmits it to the pump body via the connection rotary of the coach on the body (connection by example provided by means of bearings), without this effort solicits other parts of the pump, nor creates parasitic friction.
- the table is advantageously linked in coach rotation, preferably with a bevel gear.
- the parasitic force introduced by the contact of the bevel gear teeth in addition to the training couple is filtered by the coach, thus sparing the barrel.
- the movements of the barrel does not disturb the engagement conditions.
- the plate is secured in rotation with the driving shaft of the pump.
- the plate receives the ends rods in conformed associated receptacles, which are held on the plate by means of a clamp common circular connected to the plate by a screw Central.
- a pump according to the invention comprises a pump body 1 composed of two parts 1 a and 1 b receiving the constituent elements of the pump.
- Part 1 has received a distribution blade 2 cooperating with a barrel 3 in a bearing face denoted 4 perpendicular to the axis denoted X of revolution of the barrel 3.
- This plug 3 comprises a series of axial bores 5, (c ' that is to say extending parallel to the axis of revolution or central axis X) through-holes intended to serve as guides for pistons 6.
- a duct 7 puts the face 4 in communication with the interior of the volume of the space cylindrical defined by each bore 5 and the associated piston 6. It is through these conduits 7 that the oil is admitted or discharged into the cylindrical spaces.
- a driver 8 Surrounding the barrel 3 is rotatably mounted a driver 8 composed of a cylindrical part 9 accommodating the barrel 3, a transverse wall 10 forming the bottom serving as a support for a spring 11 pressing the barrel 3 against the dispensing glass 2, and a bevel gear 12.
- the driver 8 is here produced in the form of a unitary part, but it could alternatively be provided for the transverse wall 10 to be an attached part. In this case, there will be an axial stop, added (a rod for example) or not (a shoulder for example), to ensure the axial locking of the transverse wall 10, this locking being permanently maintained by the action of the spring. 11.
- the driver 8 is rotatably mounted on the portion 1a of the body 1, by means of bearings 13 in slant range, allowing the free rotation of the driver in a substantially axis coinciding with the central axis X of the barrel 3, and performing its axial stop.
- These bearings 13 transmit the force from the spring 11 to the part 1a of the body 1.
- Coach 8 thus understands the part cylindrical 9 receiving the barrel 3 therein, and it is provided with the transverse wall 10 forming a support for the spring 11, which wall has come completely with said cylindrical wall 9, is reported.
- Barrel 3 is centered on the axis of rotation of the coach 8 by an inner range 24 of the trainer 8, supported by a shaped bearing associated with barrel 3.
- the short axial length of the span, as well as the circumferential clearance installed preferably allows a certain angular movement of the barrel 3 opposite the coach 8, according to values which of course remain low, but are sufficient to allow the barrel to float to hold perfectly against the distribution glass in permanence under the effect of the spring 11.
- the coach 8 is provided with a bevel gear 12 intended to cooperate with a homologous gear 16 arranged on a driving shaft 14 rotatably mounted by means of bearings 15 at an oblique bearing on the part 1b of the body 1, and arranged along an axis Y which is concurrent with the axis X.
- This shaft 14 thus has at its end a bevel gear 16 meshing with the bevel gear 12 of the driver.
- grains 17 are disposed axially, each comprising a cylindrical part 18 threading in an associated bore 19 formed on the face of the shaft 14, and each having a spherical receptacle 20 swiveling the spherical end 21 of an associated rod 22, the other end 23 of which, also spherical, is swiveled on the corresponding piston 6.
- the bore 19 is produced substantially opposite the trace of the axis of the piston 6 on a plane normal to the Y axis passing through the center of the receptacles 20 of the grains 17.
- the grains 17 are linked to the plate 33 by a flange added circular 34, common to all the grains, by means of a central screw 35.
- the rods 22 pass through the wall transverse 10 by means of lights practiced in said wall 10.
- a light may be provided by connecting rod 22, or as a variant of the lights which are common to several rods 22.
- care must be taken to that this wall is stopped in rotation relative to the coach 8, to prevent this wall 10 from rotating opposite coach 8 and hit them rods 22.
- FIG 2 there is a barrel 3 in support on the distribution glass 2 having two 25.26 through-shaped manifold ports bean intended to port the holes 5 of barrel 3 either with the discharge or with pump suction.
- Coach 8 is presented in partial section, which reveals a cylindrical reach 24 coming internally to the coach 8, which here cooperates with a range 27 homologous to barrel 3, located substantially at axial mid-length thereof.
- the axial length of the range is reduced for, with the operating clearance installed between the two rooms, allow a slight floating of the barrel 3 with respect to the coach 8, so that the barrel 3 can permanently come against the distribution glass 2, even if the bearing face 4 of the barrel 3 or the distribution glass 2 is not perfectly perpendicular to the X axis of rotation of coach 8.
- a lug 28 of the barrel 3 is shown cooperating with the side 29 of a notch 30 produced in the cylindrical wall 9 of the coach 8, this for the rotational drive of the barrel 3 by coach 8.
- the coach 8 forces the barrel 3 in rotation by means of a pure torque.
- a variant could be provided in which the pins 28 are integral with the coach 8, and the notches 30 are provided in the barrel, or else any other arrangement using means mechanical counterparts in shape matching, such as grooves to the right of the span 24, these grooves being provided on one of said driver and barrel, and cooperating with homologous hollows provided on the other of these elements (variant not illustrated here).
- the separation of the coach 8 from the cylinder 3 also applies to axial piston pumps in line, the plate 33 is fixed in rotation, and on which slide pads at the end of the pistons axial 6, or to axial piston pumps in variable displacement line by inclination of the axis of rotation of the plate relative to the axis of the barrel, or by tilting the tray itself.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Steroid Compounds (AREA)
Abstract
Description
- la figure 1 représente la coupe longitudinale d'une pompe hydraulique selon l'invention ;
- la figure 2 est une vue partielle en perspective éclatée représentant l'agencement du barillet, de la glace de distribution et de l'entraíneur dans une pompe selon l'invention.
Claims (12)
- Pompe hydraulique à pistons (6) axiaux du type à axe brisé, comportant un barillet rotatif (3) à axe central (X) coopérant avec une glace de distribution (2) associée selon une surface d'appui (4) sensiblement perpendiculaire à cet axe (X), ledit barillet (3) présentant une pluralité de perçages axiaux (5) dans lesquels sont montés coulissants les pistons (6) correspondants, caractérisée en ce qu'un entraíneur (8) distinct du barillet (3) est prévu pour tourner selon un axe de rotation essentiellement confondu avec l'axe central (X), ledit entraíneur (8) assurant d'une part le centrage et l'entraínement en rotation du barillet (3) selon ledit axe de rotation (X), et d'autre part l'appui d'un moyen élastique (11) pressant la surface d'appui (4) du barillet (3) contre la glace de distribution (2).
- Pompe selon la revendication 1, caractérisée en ce que l'entraíneur (8) reçoit le barillet (3) dans une partie creuse (31), et en ce qu'une portée (24) venue intérieurement sur l'entraíneur (8) centre le barillet (3) sur l'axe de rotation (X), laissant libre le coulissement axial du barillet (3) vis à vis de l'entraíneur (8).
- Pompe selon la revendication 1 ou 2,
caractérisée en ce que la portée (24) est située sensiblement à mi-longueur axiale du barillet (3). - Pompe selon l'une des revendications précédentes, caractérisée en ce que le centrage autorise un certain débattement angulaire du barillet (3) vis à vis de l'entraíneur (8).
- Pompe selon l'une des revendications précédentes, caractérisée en ce que la liaison en rotation du barillet (3) et de l'entraíneur (8) est assuré par des moyens mécaniques homologues en correspondance de forme portés par lesdits barillet (3) et entraíneur (8).
- Pompe selon la revendication 5, caractérisée en ce que la liaison en rotation du barillet (3) et de l'entraíneur (8) est assurée par la coopération de deux ergots (28) symétriques venus sur l'un de ces éléments, avec des cavités homologues (29) pratiquées sur l'autre élément.
- Pompe selon la revendication 5, caractérisée en ce que la liaison en rotation du barillet (3) et de l'entraíneur (8) est assurée par la coopération de cannelures venues sur l'un des éléments au niveau de la portée (24) avec des creux homologues pratiqués sur l'autre élément.
- Pompe selon l'une des revendications précédentes, caractérisée en ce que l'entraíneur (8) possède une paroi transversale (10) sensiblement perpendiculaire à son axe de rotation (X), sur une face interne de laquelle est compressé le moyen élastique (11) d'appui du barillet (3) contre la glace de distribution (2).
- Pompe selon l'une des revendications précédentes, dans laquelle les pistons axiaux (6) sont montés articulés sur un plateau rotatif (33) d'axe de rotation (Y) concourant avec l'axe (X) de l'entraíneur (8), caractérisée en ce que le plateau (33) est lié en rotation à l'entraíneur (8).
- Pompe selon la revendication 9, dans laquelle la liaison en rotation est assurée à l'aide d'un engrenage conique (12,16).
- Pompe selon la revendication 9 ou 10,
caractérisée en ce que le plateau (33) est solidaire en rotation avec l'arbre menant (14) de ladite pompe. - Pompe selon l'une des revendications 9 à 11, dans laquelle les pistons axiaux (6) sont articulés au plateau (33) au moyen de biellettes (22) à extrémités sphériques (21,23), caractérisée en ce que le plateau (33) reçoit les extrémités des biellettes (21) dans des réceptacles (20) associés conformés qui sont maintenus sur le plateau (33) au moyen d'une bride circulaire (34) commune reliée au plateau (33) par une vis centrale (35).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0008482 | 2000-06-30 | ||
FR0008482A FR2811032B1 (fr) | 2000-06-30 | 2000-06-30 | Pompe a pistons axiaux du type a axe brise |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1167756A1 true EP1167756A1 (fr) | 2002-01-02 |
EP1167756B1 EP1167756B1 (fr) | 2005-04-27 |
Family
ID=8851934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01401515A Expired - Lifetime EP1167756B1 (fr) | 2000-06-30 | 2001-06-12 | Pompe à pistons axiaux du type à axe brisé |
Country Status (8)
Country | Link |
---|---|
US (1) | US6564693B2 (fr) |
EP (1) | EP1167756B1 (fr) |
JP (1) | JP4943594B2 (fr) |
AT (1) | ATE294327T1 (fr) |
CA (1) | CA2350151C (fr) |
DE (1) | DE60110314T2 (fr) |
ES (1) | ES2240367T3 (fr) |
FR (1) | FR2811032B1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7831655B2 (en) | 2001-10-18 | 2010-11-09 | Bea Systems, Inc. | System and method for implementing a service adapter |
US8668469B2 (en) * | 2011-04-28 | 2014-03-11 | Caterpillar Inc. | Hydraulic piston pump with reduced restriction barrel passage |
CN112332704B (zh) * | 2020-11-15 | 2021-10-29 | 浙江师范大学 | 一种自供电监测的滚动轴承 |
CN114001007B (zh) * | 2021-11-02 | 2024-05-14 | 河南科技大学 | 一种斜轴柱塞式液压电机泵 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL248888A (fr) | 1900-01-01 | |||
FR1261358A (fr) | 1960-04-06 | 1961-05-19 | Rech Etudes Production Sarl | Pompe et moteur à barillet |
FR1456563A (fr) | 1965-07-05 | 1966-07-08 | Dispositif à fluide du type à plateau oscillant |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2177008A (en) * | 1937-07-23 | 1939-10-24 | Ex Cell O Corp | Hydraulic motor |
US4941395A (en) * | 1988-09-08 | 1990-07-17 | Sundstrand Corporation | Bent-axis hydraulic apparatus |
-
2000
- 2000-06-30 FR FR0008482A patent/FR2811032B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-12 DE DE60110314T patent/DE60110314T2/de not_active Expired - Lifetime
- 2001-06-12 ES ES01401515T patent/ES2240367T3/es not_active Expired - Lifetime
- 2001-06-12 AT AT01401515T patent/ATE294327T1/de not_active IP Right Cessation
- 2001-06-12 EP EP01401515A patent/EP1167756B1/fr not_active Expired - Lifetime
- 2001-06-12 CA CA002350151A patent/CA2350151C/fr not_active Expired - Fee Related
- 2001-06-19 US US09/883,280 patent/US6564693B2/en not_active Expired - Lifetime
- 2001-07-02 JP JP2001201340A patent/JP4943594B2/ja not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL248888A (fr) | 1900-01-01 | |||
FR1261358A (fr) | 1960-04-06 | 1961-05-19 | Rech Etudes Production Sarl | Pompe et moteur à barillet |
FR1456563A (fr) | 1965-07-05 | 1966-07-08 | Dispositif à fluide du type à plateau oscillant |
Also Published As
Publication number | Publication date |
---|---|
DE60110314D1 (de) | 2005-06-02 |
US20020000159A1 (en) | 2002-01-03 |
FR2811032B1 (fr) | 2002-11-22 |
ATE294327T1 (de) | 2005-05-15 |
US6564693B2 (en) | 2003-05-20 |
JP2002054560A (ja) | 2002-02-20 |
FR2811032A1 (fr) | 2002-01-04 |
CA2350151A1 (fr) | 2001-12-30 |
DE60110314T2 (de) | 2006-02-16 |
CA2350151C (fr) | 2005-04-12 |
JP4943594B2 (ja) | 2012-05-30 |
ES2240367T3 (es) | 2005-10-16 |
EP1167756B1 (fr) | 2005-04-27 |
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