LU101037B1 - Fully externally-discharged compression type axial plunger pump or motor - Google Patents

Fully externally-discharged compression type axial plunger pump or motor Download PDF

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Publication number
LU101037B1
LU101037B1 LU101037A LU101037A LU101037B1 LU 101037 B1 LU101037 B1 LU 101037B1 LU 101037 A LU101037 A LU 101037A LU 101037 A LU101037 A LU 101037A LU 101037 B1 LU101037 B1 LU 101037B1
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LU
Luxembourg
Prior art keywords
housing
spring
cylinder block
base
swash plate
Prior art date
Application number
LU101037A
Other languages
German (de)
Inventor
Haishun Deng
Haifeng Wang
Qingchun Wang
Chunyan Wang
Tao Wang
Shiju He
Feiyu Mao
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Univ Anhui Sci & Technology
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Publication of LU101037B1 publication Critical patent/LU101037B1/en

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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
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • F04B1/148—Bearings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F03C1/0615—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders distributing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F03C1/0623—Details, component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F03C1/0623—Details, component parts
    • F03C1/0631—Wobbler or actuated element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F03C1/0623—Details, component parts
    • F03C1/0631—Wobbler or actuated element
    • F03C1/0634—Actuated element bearing means or driven axis bearing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0663—Casings, housings
    • F03C1/0665—Cylinder barrel bearing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0676—Arrangement for pressing the cylinder barrel against the valve plate
    • 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
    • F04B1/141—Details or component parts
    • 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
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/18—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 having self-acting distribution members, i.e. actuated by working fluid
    • F04B1/188—Plate-like distribution members
    • 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
    • F04B1/2007—Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid 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
    • 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
    • F04B1/2064—Housings
    • F04B1/2071—Bearings for cylinder barrels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

The present invention provides a fully externally-dischargedd compression type axial plunger pump or motor, and relates to the field of axial plunger pump or motor unit in hydraulic machinery. It comprises a port plate, a cylinder block, a housing, a swash plate and a drive shaft, wherein a front end cap is connected to the housing by screws; a rear end cover is connected to the housing by bolts; the cylinder body is slidingly cooperated with the housing by a self-lubricating guide post and guide sleeve, and a cylindrical coil spring is installed in the boss of the housing and acts on the surface of the boss of the cylinder block to realize the compression of a port plate pair; a universal ball spring plunger is installed on the base of the boss of the swash plate, and the ball head acts on the surface of a platen to realize the compression of the slipper pair. In the present invention, the slipper pair and the port plate pair are both externally discharged and compressed and not interfered with each other; the spring force arm is large, and the anti-overturning ability of the slipper and the cylinder block is strong; the spring is always in a compressed state, so that fatigue loss is reduced, design requirements are decreased, the structure is simple and practical, and it is easy to assemble and has a good promotion value.

Description

FULLY EXTERNALLY-DISCHARGED COMPRESSION TYPE AXIAL PLUNGER PUMP okU101037MOTOR
Technical Field
The present invention relates to the field of axial plunger pump or motor in hydraulicmachinery, in particular, to a fully externally-discharged compression type axial plunger pump ormotor.
Background Technology
Axial plunger pumps and motors are important elements of the hydraulic system. Inprinciple, axial plunger pumps and motors are reversible, with only differences in partialstructure. Therefore, only the fully externally-discharged compression type axial plunger pump isdiscussed in the present invention, and the structural design of the motor can be similar.
The axial plunger pump is a variable-volume pump with small volume, high efficiency andhigh working pressure. Its power is driven by the main shaft through the spline to rotate the rotor.A plurality of plungers uniformly distributed on the rotor compress the slipper on the surface ofthe friction plate of the swash plate through the ball hinge and the platen. Since the swash plateplane has a certain inclination angle with respect to the rotation axis, the plunger not only rotatestogether with the rotor, but also reciprocates linearly along the plunger hole of the rotor tocomplete the process of sucking and discharging the oil of the plunger pump.
The compression mechanism of the axial plunger pump must provide preload force to theslipper pair and the port plate pair, ensuring that the cylinder block or the port plate is in a floatingstate, thereby achieving the optimal oil film thickness of the hydraulic static balance and causingthe cylinder and allowing the cylinder block and the oil distribution plate, the slipper and thevariable head to operate under pure liquid friction. There are two types of compression methodsfor commonly used plunger pumps: one is to install a spring in the plunger hole of the cylinderblock to provide an axial thrust to the plunger, so that the plunger ball head acts on the slidingshoe and compress the slipper against the surface of the swash plate; however, uninterruptedtelescopic movement will cause great wear on the spring, which will eventually lead to springfatigue failure and adversely affect the working stability of the plunger pump. Another is toprovide a central spring between the cylinder block and the platen, so that the central spring isplaced against the platen to generate a pre-pressure. As there is enough clearance between theplaten and the cylinder block, the plunger can move freely, and the spring is always in compression and is only subjected to static loads and does not cause fatigue failure. Howevbli101037the structural size of the spring is small and the pre-stress is large, that is, the rigidity of thespring is large, which puts high requirements on the structural design of the plunger pump andimproves the difficulty in processing.
In order to provide a universal compression mechanism with a simple structure, the patentof Chinese Patent Publication No. CN104863813A proposed by the first inventor of the presentinvention discloses a compression unit for swash plate axial plunger pump or motor. The cylinderblock and the bottom surface of the slipper of the compression unit are provided with outwardlyprotruding annular ring blocks, and the compression spring is placed in the spring cavity of thepressure ring, then the compression spring provides a thrust to the pressure ring, so that thepressure ring is compressed against the pressure ring for compressing the slipper against thesurface of the swash plate. The compression unit achieves a close fit between the slipper andthe swash plate by providing a constant pressure to the platen, provides an practical andeffective externally-discharging compression method for the axial plunger pump or motor, andimproves the working stability of the axial plunger pump or motor. However, the followingproblems still need to be resolved: 1. The slipper pair and the port plate pair of the compression mechanism share a compressionunit, and the slipper pair and the port plate pair interact with each other, which increases thedifficulty in design. 2. The compression mechanism has high requirements on the processing precision of thepressure ring and the platen, and does not have a positioning mechanism, so it is easy totake off the shoe, thereby improving the difficulty in assembly and reducing the productionefficiency.
The fully externally-discharged compression type axial plunger pump or motor related in thepresent invention makes the plunger pump form a stable shoe pair by providing a constantpressure on the platen, and then keeps the cylinder block in a floating state to form a stable portplate pair by the thrust applied on the cylinder block from the spring. The fullyexternally-discharged compression type axial plunger pump or motor causes the slipper pair andthe port plate pair of the plunger pump to be in a separate compression state without affectingeach other, has a simple structure, is easy to assembly, and effectively improves the workingperformance of the plunger pump or the motor.
Summary of the Invention
The object of the present invention is to provide a fully externally-discharged compresstóih101037type axial plunger pump or motor to solve the problems proposed in the background.
To achieve the above object, the present invention provides the following technical solution:a fully externally-discharged compression type axial plunger pump or motor comprises a portplate, a cylinder block, a housing, a swash plate and a drive shaft; the front end cap is connectedto the housing by screws, and the rear end cover is connected to the housing by bolts; the driveshaft drives the rotation of the port plate and the swash plate by splines, the fullyexternally-discharged compression mechanism comprising a port plate pairexternally-discharged compression unit and a slipper pair externally-discharged compressionunit.
In a preferred solution, the port plate pair externally-discharged compression unit includes aself-lubricating guide post, a self-lubricating guide sleeve, and a cylindrical coil spring; thecylinder block is provided with an outer ring boss, and a guide post hole is formed on the boss,the self-lubricating guide post being installed in the guide post hole of the cylinder block; thehousing is provided with an inner ring boss, and a guide sleeve hole and a spring mountinggroove are formed on the boss, the self-lubricating guide sleeve being installed in the guidesleeve hole of the housing, and the cylindrical coil spring being installed in the spring mountinggroove of the housing and in contact with the surface of the outer ring boss of the cylinder blockto provide pressure to the boss by compressing the spring; the cylinder block is slidinglycooperated with the housing by the self-lubricating guide post and the guide sleeve.
In a preferred solution, the slipper pair externally-discharged compression unit includes abase and a universal ball spring plunger; the inclined surface of the swash plate is provided witha perimeter of outwardly protruding bosses, the boss of the swash plate is provided with a basemounting hole, and the base is installed in the corresponding base mounting hole; the universalball spring plunger is installed on the base, the ball head thereof is in contact with the surface ofa platen to compress the spring for applying pressure to the surface of the platen through the ballhead.
In a preferred solution, a plurality of guide post mounting holes uniformly distributedsymmetrically around the axis are formed on the outer ring boss of the cylinder block.
In a preferred solution, the guide sleeve mounting hole on the housing has the same centerposition and number as the guide post mounting hole of the cylinder block.
In a preferred solution, the spring mounting groove on the housing is concentric with the guide sleeve mounting hole.
In a preferred solution, the inclined end of the swash plate is provided with a perimeter ofbosses protruding outwardly, and the surface of the boss is parallel to the surface of the swashplate.
In a preferred solution, a plurality of base mounting holes uniformly distributed symmetricallyaround the axis are arranged on the boss of the swash plate.
In a preferred solution, the surface of the base is machined with an external thread and is inthreaded connection with the base mounting hole.
In a preferred solution, the front end of the base has a blind hole and is machined with aninternal thread; the surface of the universal ball spring plunger is machined with an externalthread and is in threaded connection with the base.
Compared with the prior art, the present invention has the following beneficial effects: 1. It adopts externally-discharged compression and the anti-overturning ability is strong. Thespring force in the present invention acts on the outer ring of the cylinder block and the platen,and the force arm is large, which is more advantageous for balancing the cylinder body and theslipper and preventing overturning. 2. Spring loss and platen wear are reduced. In the present invention, by applying pressure tothe surface of the platen through the ball head of the universal ball spring plunger, the platencompressing the slipper against the surface of the swash plate, the spring in the universal ballspring plunger being always in compression with no telescopic movement, so that the fatiguefailure of the spring due to telescopic movement is prevented; the main friction form of the ballhead and the platen of the universal ball spring plunger is rolling friction, which greatly reducesthe friction and wear of the platen. 3. It has precise positioning and is easy to assembly. In the present invention, theself-lubricating guide post and guide sleeve uniformly distributed symmetrically around the axisare cooperated to achieve precise positioning of the cylinder block and the housing, so that theself-lubricating guide post and the guide sleeve have high precision and excellent guidingfunction, and have self-lubricating characteristics, which do not affect the floating property of thecylinder block, and are easy to be disassembled and replaced, thereby reducing production cost. 4. The distribution of spring forces is more reasonable and uniform. In the present invention,the cylindrical coil spring and the universal ball spring plunger are uniformly and symmetricallyinstalled around the axis, which is equivalent to uniformly applying the spring force to the cylinder block and the swash plate to form a stable port plate pair and a slipper pair, and the spriiAt? Φ3 037always in compression, thereby slowing the fatigue failure of the spring and improving thereliability of the plunger pump. 5. It has independent compression mechanisms. The invention adopts the compressionaction between the port plate pair and the slipper pair achieved by two sets of independentcompression units that do not affect each other to improve the stability of the compression unit.Brief Description of the Drawings
Fig. 1 is a view of the structure of the present invention;
Fig.2 is a view of the compression torque of the present invention; • Fig. 3 is a cross-sectional view of the cylinder block of the present invention;
Fig. 4 is a cross-sectional view of the housing of the present invention.
Fig. 5 is a partial view of the housing of the present invention.
Fig. 6 is a front view of the port plate of the present invention.
Fig. 7 is a cross-sectional view of the swash plate of the present invention. ; Fig. 8 is a view of the base of the present invention.
Fig. 9 is a view of the port plate pair compression mechanism of the present invention.
Fig. 10 is a view of a plurality of rows of fully externally-discharged compression type axialplunger pumps.
Fig. 11 is a view of fully externally-discharged compression type axial plunger pump that I drives the cylinder block to rotate with the drive shaft.
In figures: 1-rear end cap; 2-port plate; 3-cylinder block; 4-housing; 5-port plate pairexternally-discharged compression unit; 51-self-lubricating guide post; 52-cylindrical coil spring;53-self-lubricating guide sleeve; 6-plunger; 7-slipper pair externally-discharged compressionunit; 71-base; 72-universal ball spring plunger; 8-slipper; 9-platen; 10-swash plate; 11-driveshaft; 12-front end cap.
Embodiments of the Invention
In order to make objectives, technical solutions, and advantages of embodiments of thepresent invention clearer, the technical solutions in the embodiments of the present invention aredescribed clearly and completely in the following with reference to accompanying drawings in theembodiments of the present invention. Apparently, the described embodiments are only partrather than all of the embodiments of the present invention. All other embodiments obtained bypersons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
With reference to Figs. 1 to 9, the present invention provides a technical solution: a fullyexternally-discharged compression type axial plunger pump or motor comprises a port plate 2, acylinder block 3, a housing 4, a swash plate 10 and a drive shaft 11; the front end cap 12 isconnected to the housing 4 by screws, and the rear end cover 1 is connected to the housing 4 bybolts; the drive shaft 11 drives the rotation of the port plate 2 and the swash plate 10 by splines,the fully externally-discharged compression mechanism comprising a port plate pairexternally-discharged compression unit 5 and a slipper pair externally-discharged compressionunit 7. The port plate pair externally-discharged compression unit 5 includes a self-lubricatingguide post 51, a self-lubricating guide sleeve 53, and a cylindrical coil spring 52; the cylinderblock 3 is provided with an outer ring boss, and a guide post hole is formed on the boss, theself-lubricating guide post 51 being installed in the guide post hole of the cylinder block 3; thehousing 4 is provided with an inner ring boss, and a guide sleeve hole and a spring mountinggroove are formed on the boss, the self-lubricating guide sleeve 53 being installed in the guidesleeve hole of the housing 4, and the cylindrical coil spring 52 being installed in the springmounting groove of the housing 4 and in contact with the surface of the outer ring boss of thecylinder block 3 to provide pressure to the boss by compressing the spring; the cylinder block 3 isslidingly cooperated with the housing 4 by the self-lubricating guide post and the guide sleeve.The slipper pair externally-discharged compression unit 7 includes a base 71 and a universal ballspring plunger 72; the inclined surface of the swash plate 10 is provided with a perimeter ofoutwardly protruding bosses, the boss of the swash plate 10 is provided with a base mountinghole, and the base 71 is installed in the corresponding base mounting hole; the universal ballspring plunger 72 is installed on the base 71, the ball head thereof is in contact with the surfaceof a platen 9 to compress the spring for applying pressure to the surface of the platen through theball head.
In the present invention, and in a specific example, as shown in Fig. 1, the drive shaft 11 isconnected to the swash plate 10 and the port plate 2 by a spline, and the drive shaft 11 drivesthe swash plate 10 and the port plate 2 to rotate; the cylinder block 3 is slidingly cooperated withthe housing 4 by the self-lubricating guide post 51 and the guide sleeve 53, and the cylinderblock 3 is in a floating state; the cylindrical coil spring 52 is installed in the spring mountinggroove in the housing 4 that are uniformly symmetrically distributed about the axis, and in contactwith the surface of the outer ring boss on the cylinder block 3, to apply pressure to the cylinder block 3, so that the cylinder block 3 and the port plate 2 are closely attached to form a portt^1âtW37pair; the universal ball spring plunger 72 is installed on a base 71 that is uniformly andsymmetrically installed about the axis of the swash plate 10, and the spring acts on the surface ofthe platen 9 and presses the platen 9 against the surface of the swash plate 10, so that theslipper 8 and the swash plate 10 are closely fitted to form a slipper pair; the slipper pair and theport plate pair of the plunger pump are in a separate compression state without affecting eachother, and the springs in the cylindrical coil spring 52 and the universal ball spring plunger 72 arealways in a compressed state without reciprocating linear motion, so that the fatigue loss for thespring is reduced; the cylindrical coil spring 52 is located on the outer ring of the cylinder block 3,the universal ball spring plunger 72 is located on the outer ring of the boss of the swash plate 10,and the force arm of the spring force is larger, so that the requirements for the spring design areeffectively reduced.
The working mode of the above embodiments of the present invention is shown in Figs. 1and 2: when the drive shaft 11 drives the port plate 2 and the swash plate 10 to rotate clockwise,the upper plunger 6 in Fig. 1 starts to suck oil, and the lower plunger 6 starts to discharge oil. Thesuction in the suction plunger chamber will cause the plunger 6 to be disengaged from the swashplate 10 together with the slipper 8, and the compression force on the platen 9 may compress theslipper 8 against the swash plate 10, causing the slipper 8 to be compressed against the surfaceof the swash plate 10. It can be seen from Fig. 2 that the force arm A of the compression force ofthe compression portion of the slipper pair in the embodiment of the present invention is farlarger than the force arm B of the central spring compression force in the prior art, which is moreadvantageous for the balance of the slipper 8 and prevents overturning of the slipper 8. At thesame time, in the compression portion of the port plate pair, the force arm C of the compressionforce is close to the maximum outer diameter of the cylinder block 3, and the force arm is large,which is more advantageous for the stability of the cylinder block 3 and prevents the cylinderblock 3 from overturning.
In the present invention, as a preferred embodiment, as shown in Fig. 1, the self-lubricatingguide post 51 is interference-fitted with the guide post mounting hole on the outer ring boss of thecylinder block 3, and the guide post mounting hole is uniformly symmetrically distributed aroundthe axis of the cylinder block 3. The self-lubricating guide sleeve 53 has an interference fit withthe guide sleeve mounting hole on the inner ring boss of the housing 4, and the guide sleevemounting hole has the same position and number as the matching guide post mounting hole.
The guide post and the guide sleeve which are uniformly and symmetrically installed and LU101037cooperated will accurately position the cylinder block 3, and the self-lubricating characteristics ofthe guide post and the guide sleeve will not affect the floating of the cylinder block 3. Cooperatingslidingly the self-lubricating guide post and the guide sleeve to achieve the connection betweenthe cylinder block 3 and the housing 4 facilitates disassembling and replacing, avoids thephenomenon of replacing cylinder block 3 or housing 4 as a whole due to damage of connectingparts, improves the working stability of the axial plunger pump or motor, and greatly reducesproduction costs and assembly difficulties.
In the present invention, as a preferred embodiment, as shown in Figs. 1 to 5, the springmounting groove is concentric with the guide sleeve mounting hole, the cylindrical coil spring 52is installed in the spring mounting groove and acts on the boss surface of the cylinder block 3,the axis of the cylindrical coil spring 52 coincides with the axis of the self-lubricating guide post51, and the spring force acts uniformly in the region centered on the axis of the self-lubricatingguide post 51 ; a plurality of uniformly symmetrically distributed cylindrical coil springs 52 actsimultaneously to provide a constant pressure to the cylinder block 3. At the same time, theself-lubricating guide post 51 also provides a guiding action to the cylindrical coil spring 52, sothat the cylindrical coil spring 52 always acts along the axial direction, avoiding the large radialfluctuation of the spring. The compression structure makes the axial plunger pump structuremore compact, reduces the volume of the pump, and saves production costs.
In the present invention, as a preferred embodiment, as shown in Figs. 1 to 7, the inclinedend of the swash plate 10 is provided with a perimeter of bosses protruding outwardly, and thesurface of the boss is parallel to the surface of the swash plate 10; a plurality of base mountingholes uniformly distributed symmetrically around the axis are arranged on the boss, and the base71 is in connection with the corresponding base mounting hole thread. The universal ball springplunger 72 is installed on the base 71 to make the slipper 8 closely fitted with the swash plate 10by the ball head thereof applying pressure to the platen 9. The base 71 is directly installed fromthe outer surface of the boss of the swash plate 10, which greatly reduces the assembly difficultyand saves processing time. At the same time, the base 71 serves as a common part fordetachable replacement, which avoids the integral processing with the swash plate 10 andreduces the processing cost caused by the damage of the base 71.
In the present invention, as an optional embodiment, as shown in Fig. 10, in the pluralityrows of fully externally-discharged compression type axial plunger pump, the swash plate in this embodiment has a plurality of staggered planes, the conventional compression method may nckU101037provide a constant and stable pressure to the slipper pair and the port plate pair, and thecompression unit has a complicated structure and low stability. If the fully externally-dischargedcompression type axial plunger pump or motor structure of the above embodiments of thepresent invention is employed, the slipper pair and the port plate pair may be separatelycompressed to effectively improve the operation reliability of the axial plunger pump or the motor,and the structure is simple and easy to assemble.
In the present invention, as an optional embodiment, the fully externally-dischargedcompression type axial plunger pump is shown in Fig. 11. Different from the transmission modeof the above embodiments, the present embodiment drives the cylinder block to rotate by thedrive shaft to realize the process of sucking and discharging oil, but the fullyexternally-discharged compression mechanism is still applicable. A plurality of bases areuniformly symmetrically installed on the boss of the outer ring of the cylinder block, and acorresponding universal ball spring plunger is installed on the bases, then the separatecompression of the port plate pair is realized by the action of the spring force; the compression ofthe slipper pair is realized by the same method as in the above embodiments. The aboveembodiments show that the compression mechanism for the fully externally-dischargedcompression type axial plunger pump or motor of the present invention has universal applicabilityto an axial plunger pump or a motor, and has a broad market prospect.
It is to be explained that the relationship terms, such as "first" and "second", are used hereinonly for distinguishing one entity or operation from another entity or operation but do notnecessarily require or imply that there exists any actual relationship or sequence of this sortbetween these entities or operations. Furthermore, terms "comprising", "including" or any othervariants are intended to cover the non-exclusive including, thereby making that the process,method, merchandise or device comprising a series of elements comprise not only thoseelements but also other elements that are not listed explicitly or the inherent elements to theprocess, method, merchandise or device. In the case of no more limitations, the element limitedby the sentence "comprising a..." does not exclude that there exists another same element in theprocess, method, merchandise or device comprising the element.
The above various embodiments are only used to illustrate the technical solutions of thepresent invention without limitation; and despite reference to the aforementioned embodimentsto make a detailed description of the present invention, those of ordinary skilled in the art should understand: the described technical solutions in above various embodiments may be modified-blr101037the part of technical features may be equivalently substituted; while these modifications orsubstitutions do not make the essence of their corresponding technical solutions deviate from thespirit and scope of the technical solutions of the embodiments of the present invention

Claims (10)

LU101037LU101037 1. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor, umfassend eineÖffnungsplatte (2), einen Zylinderblock (3), ein Gehäuse (4), eine Taumelscheibe (10) und eineAntriebswelle (11), dadurch gekennzeichnet, dass eine Vorderendkappe (12) durch Schrauben mit demGehäuse (4) verbunden ist und eine Rückendabdeckung (1) durch Bolzen mit dem Gehäuse (4)verbunden ist; die Antriebswelle (11) die Öffnungsplatte (2) und die Taumelscheibe (10) durch Keiledrehend antreibt und der vollständig nach außen ausstoßende Verdichtungsmechanismus eine nachaußen ausstoßende Öffnungsplattenpaarverdichtungseinheit (5) und eine nach außen ausstoßendeGleitpaarverdichtungseinheit (7) umfasst.A fully outwardly projecting axial piston compression pump or engine comprising an opening plate (2), a cylinder block (3), a housing (4), a swash plate (10) and a drive shaft (11), characterized in that a front end cap (12) is screwed is connected to the housing (4) and a rear end cover (1) is connected by bolts to the housing (4); the drive shaft (11) drives the orifice plate (2) and the swash plate (10) in a splined manner, and the fully outwardly discharging compression mechanism comprises an outwardly opening orifice plate pair compression unit (5) and an outward sliding pair compression unit (7). 2. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 1,dadurch gekennzeichnet, dass die nach außen ausstoßende Öffnungsplattenpaarverdichtungseinheit (5)einen selbstschmierenden Führungspfosten (51), eine selbstschmierenden Führungshülse (53) und einezylindrische Spiralfeder (52) beinhaltet; der Zylinderblock (3) mit einem Außenringansatz versehen istund ein Führungspfostenloch am Ansatz gebildet ist, wobei der selbstschmierende Führungspfosten (51)im Führungspfostenloch des Zylinderblocks (3) installiert ist; das Gehäuse (4) mit einemInnenringansatz versehen ist und ein Führungshülsenloch und eine Federmontagenut am Ansatzgebildet sind, wobei die selbstschmierende Führungshülse (53) im Führungshülsenloch des Gehäuses(4) installiert ist und die zylindrische Spiralfeder (52) in der Federmontagenut des Gehäuses (4)installiert ist und mit der Oberfläche des Außenringansatzes des Zylinderblocks (3) in Kontakt steht, umdurch Zusammendrücken der Feder Druck auf den Ansatz auszuüben; und der Zylinderblock (3) durchden selbstschmierenden Führungspfosten und die Führungshülse gleitend mit dem Gehäuse (4)zusammenwirkt.2. A fully outwardly-projecting axial-piston compression pump or motor according to claim 1, characterized in that said outwardly projecting orifice plate pair compression unit (5) includes a self-lubricating guide post (51), a self-lubricating guide sleeve (53) and a cylindrical coil spring (52); the cylinder block (3) is provided with an outer race shoulder and a guide post hole is formed at the boss, the self-lubricating guide post (51) being installed in the guide post hole of the cylinder block (3); the housing (4) is provided with an inner race shoulder and a guide sleeve hole and a spring mounting groove are formed on the boss, the self-lubricating guide sleeve (53) being installed in the guide sleeve hole of the housing (4) and the cylindrical coil spring (52) in the spring mounting groove of the housing (4) is installed and in contact with the surface of the outer annular shoulder of the cylinder block (3) to apply pressure to the shoulder by compressing the spring; and the cylinder block (3) slidably cooperates with the housing (4) through the self-lubricating guide post and the guide sleeve. 3. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 1,dadurch gekennzeichnet, dass die nach außen ausstoßende Gleitpaarverdichtungseinheit (7) eine Basis(71) und einen Universalkugelfederkolben (72) beinhaltet; die abgeschrägte Fläche der Taumelscheibe(10) mit einem Umfang von nach außen vorspringenden Ansätzen versehen ist, der Ansatz derTaumelscheibe (10) mit einem Basismontageloch versehen ist und die Basis (71) in dementsprechenden Basismontageloch installiert ist; und der Universalkugelfederkolben (72) an der Basis(71) installiert ist und sein Kugelkopf mit der Oberfläche einer Druckplatte (9) in Kontakt steht, um dieFeder zusammenzudrücken, um über den Kugelkopf Druck auf die Oberfläche der Druckplatteauszuüben.3. A fully outwardly projecting axial piston compression pump or motor according to claim 1, characterized in that the outwardly expelled sliding pair compression unit (7) includes a base (71) and a universal ball spring piston (72); the tapered surface of the swash plate (10) is provided with a periphery of outwardly projecting lugs, the lug of the swash plate (10) is provided with a base mounting hole, and the base (71) is installed in the corresponding base mounting hole; and the universal ball spring piston (72) is installed on the base (71) and its ball head is in contact with the surface of a pressure plate (9) to compress the spring to apply pressure to the surface of the pressure plate via the ball head. 4. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 2,dadurch gekennzeichnet, dass eine Vielzahl von Führungspfostenmontagelöchern, die gleichmäßigsymmetrisch um die Achse verfeilt ist, am Außenringansatz des Zylinderblocks (3) gebildet ist.4. A fully outwardly projecting axial piston pump or motor according to claim 2, characterized in that a plurality of guide post mounting holes, which is uniformly symmetrical about the axis, is formed on the outer annular shoulder of the cylinder block (3). 5. Vollstandig nach außen ausstoBende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 2oder 4, dadurch gekennzeichnet, dass das Führungshülsenmontageloch am Gehäuse (4) die gleiche°1°37Mittelposition und Anzahl wie das Führungspfostenmontageloch des Zylinderblocks (3) aufweist.A fully outwardly extending axial piston compression pump or motor according to claim 2 or 4, characterized in that the guide sleeve mounting hole on the housing (4) has the same ° 1 ° 37 center position and number as the guide post mounting hole of the cylinder block (3). 6. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 2oder 5, dadurch gekennzeichnet, dass die Federmontagenut am Gehäuse (4) mit demFührungshülsenmontageloch konzentrisch ist.6. Fully outwardly projecting axial piston compression pump or motor according to claim 2 or 5, characterized in that the spring mounting groove on the housing (4) is concentric with the guide sleeve mounting hole. 7. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 3,dadurch gekennzeichnet, dass das abgeschrägte Ende der Taumelscheibe (10) mit einem Umfang ausAnsätzen versehen ist, die nach außen vorspringen, und die Oberfläche des Ansatzes parallel zurOberfläche der Taumelscheibe ist.A fully outwardly projecting axial piston compression pump or motor according to claim 3, characterized in that the tapered end of the swash plate (10) is provided with a periphery of projections projecting outwardly and the surface of the shoulder is parallel to the surface of the swash plate. 8. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 3oder 7, dadurch gekennzeichnet, dass eine Vielzahl von Basismontagelöchern, die gleichmäßigsymmetrisch um die Achse verfeilt ist, am Ansatz der Taumelscheibe (10) angeordnet ist.8. Fully outwardly projecting Axialkolbenverdichtungspumpe or engine according to claim 3 or 7, characterized in that a plurality of base mounting holes, which is uniformly symmetrical ver filed around the axis, at the base of the swash plate (10) is arranged. 9. Vollstandig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 3oder 8, dadurch gekennzeichnet, dass die Oberfläche Basis (71) mit einem Außengewinde versehen istund in Gewindeverbindung mit dem Basismontageloch steht.9. A fully outwardly projecting axial piston pump or motor according to claim 3 or 8, characterized in that the surface of the base (71) is provided with an external thread and is in threaded connection with the base mounting hole. 10. Vollständig nach außen ausstoßende Axialkolbenverdichtungspumpe oder Motor nach Anspruch 3oder 9, dadurch gekennzeichnet, dass das Vorderende der Basis (71) ein Blindloch aufweist und miteinem Innengewinde versehen ist; und die Oberfläche des Universalkugelfederkolbens (72) mit einemAußengewinde versehen ist und in Gewindeverbindung mit der Basis (71) steht.A fully outwardly projecting axial piston pump or motor according to claim 3 or 9, characterized in that the front end of the base (71) has a blind hole and is internally threaded; and the surface of the universal ball spring piston (72) is externally threaded and threadably connected to the base (71).
LU101037A 2017-10-29 2018-01-18 Fully externally-discharged compression type axial plunger pump or motor LU101037B1 (en)

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575357A (en) * 2017-10-29 2018-01-12 安徽理工大学 A kind of complete outer row pressure compact form axial plunger pump or motor
CN108425819A (en) * 2018-03-31 2018-08-21 何旺成 Swash plate skid shoe type axial plunger Water Hydraulic Pump or motor
CN108612621A (en) * 2018-06-21 2018-10-02 龙工（上海）精工液压有限公司 Hydraulic motor floating port plate structure
CN109139404A (en) * 2018-10-17 2019-01-04 安徽理工大学 A kind of multiple rows of axial plunger pump/motor that novel outlet compresses
CN111980820A (en) * 2019-05-22 2020-11-24 罗伯特·博世有限公司 Method and control unit for predicting a return spring failure of a piston in a motor vehicle
CN112664421B (en) * 2020-12-28 2023-08-04 西安精密机械研究所 Split type multi-degree-of-freedom valve plate of variable fuel pump
CN114367941A (en) * 2021-07-16 2022-04-19 日照朝力信息科技有限公司 Assembling device and assembling process of plunger pump
CN114310152B (en) * 2021-10-13 2023-12-05 宁波正元铜合金有限公司 Processing technology and device for plane oil distribution disc of plunger pump
CN114083469B (en) * 2021-10-27 2023-07-04 辽宁省交通高等专科学校 Zero point locator structure for production assembly line

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3816786B2 (en) * 2001-11-15 2006-08-30 株式会社不二越 Volume control device for variable displacement piston pump
CN101818727A (en) * 2009-02-28 2010-09-01 杨灏 Novel axial plunger pump/motor
CN201433868Y (en) * 2009-05-31 2010-03-31 重庆江陵仪器厂 Axial variable plunger pump
CN101949384A (en) * 2010-09-16 2011-01-19 陶亚平 Axial plunger body
CN202867172U (en) * 2012-10-31 2013-04-10 上海高压油泵厂有限公司 Pressure compensation variable displacement mechanism used for CY-type axial plunger pump
CN104863813B (en) * 2015-06-01 2017-01-25 安徽理工大学 Swash plate type axial plunger pump or motor pressing device
CN205243748U (en) * 2015-12-04 2016-05-18 安徽理工大学 Axial plunger pump of cylinder body entirely floats
CN105526050B (en) * 2015-12-04 2017-07-25 安徽理工大学 A kind of axial plunger pump or motor of full floating cylinder body
CN107575357A (en) * 2017-10-29 2018-01-12 安徽理工大学 A kind of complete outer row pressure compact form axial plunger pump or motor

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