CN106837727B - A kind of cam-type axial piston pump with porous media support pads - Google Patents

A kind of cam-type axial piston pump with porous media support pads Download PDF

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Publication number
CN106837727B
CN106837727B CN201710198836.0A CN201710198836A CN106837727B CN 106837727 B CN106837727 B CN 106837727B CN 201710198836 A CN201710198836 A CN 201710198836A CN 106837727 B CN106837727 B CN 106837727B
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CN
China
Prior art keywords
porous media
support pads
media support
cap
pressure oil
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CN201710198836.0A
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Chinese (zh)
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CN106837727A (en
Inventor
赵建华
王强
张斌
陈涛
刘竟成
高殿荣
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Yanshan University
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Yanshan University
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20Multi-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
    • F04B1/22Multi-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 having two or more sets of cylinders or pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00

Abstract

A kind of cam-type axial piston pump with porous media support pads includes mainly drive shaft, sealing cover, drive end bearing bracket, valve plate, bearing, adjusting pad, cylinder body, shell, plunger, spring base, retracting spring, piston shoes, porous media support pads, rear end cap, seal plug, pressure oil bypass road A, pressure oil bypass road B and cylinder roller bearing.The present invention can improve the hydrostatic support bearing capacity of Slipper coupling, reduce the fretting wear of piston shoes, improve the operation stability and service life of Slipper coupling.

Description

A kind of cam-type axial piston pump with porous media support pads
Technical field
The present invention relates to liquid static-pressure support fields.
Background technology
Axial plunger pump be it is a kind of by multiple plungers configuration on the circumference of a common cylinder body, cylinder body when rotated, Plunger can do relatively reciprocating motion in the plunger hole of cylinder body, and the function of oil suction and oil extraction is realized by oil distribution mechanism.It is axial The advantages that plunger pump is due to simple in structure, reliable operation, and oil extraction pressure is big, is widely used in production.
Currently, existing axial plunger pump includes oil distribution casing, cylinder body, plunger, piston shoes, main shaft and rear end cap.Wherein match oil Disk maintains static, main shaft rotation, to drive the plunger in cylinder body and cylinder body to rotate together.Piston shoes are externally provided with and plunger, piston shoes The rear end cap rotated together, the retracting spring using cylinder body as support push rear end cap, and piston shoes are tightly pressed against mostly empty by rear end cap On support pads.One end of piston shoes is set to keep leakproofness.When cylinder body rotates, one end of intake side plunger by retracting spring and after Piston shoes are pressed on more empty support pads and slide and oil suction by end cap, and the other end oil distribution casing of the plunger of oil extraction side pushes back and oil extraction.Column Plug moves reciprocatingly while with cylinder body in cylinder body.During main shaft rotates a circle, piston reciprocation movement is primary, complete At an oil suction and oil extraction.Its shortcoming:Since plunger pump velocity of rotation is big, Slipper coupling responds not in time, static pressure oil film It is big to establish hysteresis quality, the failure of hydrostatic support effect, piston shoes serious wear.
Invention content
The object of the present invention is to provide a kind of hydrostatic support bearing capacity that can improve Slipper coupling, the frictions of reduction piston shoes Abrasion, improves the operation stability of Slipper coupling and the cam-type axial piston pump with porous media support pads of service life.
The invention mainly comprises have drive shaft, sealing cover, drive end bearing bracket, valve plate, bearing, adjusting pad, cylinder body, shell, column Plug, spring base, retracting spring, piston shoes, porous media support pads, rear end cap, seal plug, pressure oil bypass road A, pressure oil bypass road B and cylinder roller bearing.
Wherein, one end of drive shaft sequentially passes through sealing cover, drive end bearing bracket and valve plate, and one end of drive shaft is equipped with keyway, End cover is connected with drive end bearing bracket.Drive shaft is connected by two groups of bearings with drive end bearing bracket, and adjusting pad is equipped between two groups of bearings. It is equipped with inlet port and press oil port in the outside of drive end bearing bracket.The other end of drive shaft is connected with cylinder body, is set between cylinder body and drive end bearing bracket There is valve plate.It is equipped with leakage hole on the surface of the external sleeve joint shell body of cylinder body, shell.Column is equipped in cylinder interior plunger hole Plug, one end in plunger hole are equipped with spring base, and spring base is connected with one end of retracting spring, and the other end of retracting spring is located at The other end of plunger hole.Piston shoes are equipped at the bulb end of plunger, one end of piston shoes is equipped with ball corresponding with the bulb end of plunger Shape concave surface, is equipped with porous media support pads between the end face and rear end cap of one end of piston shoes, and porous media support pads are annular Disk is equipped with several through-holes on porous media support pads.It is equipped with the porous disc placing groove of annular and logical liquid at the middle part of rear end cap Slot, porous media support pads are placed in porous disc placing groove.Several screw holes and a fabrication hole on rear end cap, rear end cap with Shell is connected by screw.The grafting seal plug in fabrication hole is internally provided with pressure oil bypass road A, pressure oil in rear end cap The both ends of bypass road A are connected to logical liquid bath, the fabrication hole of rear end cap respectively, and one end of pressure oil bypass road A and pressure oil bypass road B connects Logical, the other end of pressure oil bypass road B passes through rear end cap and enclosure interior, extends to the press oil port of drive end bearing bracket.Taper roll bearing It fixes inside housings, the outer ring of circular cone roller bearing is fixed on shell, and the inner ring of circular cone roller bearing is socketed in drive shaft On.
Preferably, annular porous media support pads, outer diameter 78mm, internal diameter 25mm, thickness 5mm;Porosity is Generally 15%~25%.
Preferably, the logical liquid bath outer diameter of rear end cap is 60mm, internal diameter 50mm, thickness 5mm.
Preferably, the diameter of pressure oil bypass road A and pressure oil bypass road B are 5mm.
In the use of the present invention, after axial plunger pump startup, press oil port persistently flows out the hydraulic oil with certain pressure;Pressure The hydraulic oil of hydraulic fluid port is flowed by the pressure oil bypass road A of shell and rear end cap, pressure oil bypass road B in logical liquid bath;In logical liquid bath Fluid forms one layer of oil film after porous media support pads between support pads and piston shoes, hydrostatic support power is generated, by piston shoes group Part suspension is lifted;Piston shoes are in rotation process, persistently by the hydrostatic support power of porous media, between real-time ensuring piston shoes and swash plate There are oil films, form hydrostatic support, avoid direct physical contact.
The present invention has the following advantages that compared with prior art:Hydrostatic support bearing capacity, the drop of Slipper coupling can be improved The fretting wear of low piston shoes improves the operation stability and service life of Slipper coupling.
Description of the drawings
Fig. 1 is the isometric side schematic diagram of cam-type axial piston pump;
Fig. 2 is the horizontal cross of cam-type axial piston pump;
Fig. 3 is the vertical sectional view of cam-type axial piston pump;
Fig. 4 is the front view of porous media support pads;
Fig. 5 is the overhead sectional view of porous media support pads;
Fig. 6 is the isometric side schematic diagram of porous media support pads;
Fig. 7 is the front view of shell;
Fig. 8 is the vertical view semi-cutaway of shell;
Fig. 9 is the left view semi-cutaway of shell;
Figure 10 is the equal shaft side figures of shell;
Figure 11 looks up semi-cutaway for rear end cap;
Figure 12 is the left view semi-cutaway of rear end cap;
Figure 13 is that the right side of rear end cap regards semi-cutaway;
Figure 14 is the front view of rear end cap;
Figure 15 is the rearview of rear end cap;
Figure 16 is the isometric side schematic diagram of rear end cap.
In figure, 1- drive shafts, 2- sealing covers, 3- drive end bearing brackets, 4- valve plates, 5- keyways, 6- bearings, 7- adjusting pads, 8- inhale Hydraulic fluid port, 9- press oil ports, 10- cylinder bodies, 11- shells, 12- leakage holes, 13- plungers, 14- spring bases, 15- retracting springs, 16- are slided Boots, 17- rear end caps, 18- porous medias support pads, 19- porous discs placing groove, 20- lead to liquid bath, 21- screw holes, 22- fabrication holes, 23- screws, 24- seal plugs, 25- pressure oil bypass road A, 26- pressure oil bypass road B, 27- taper roll bearings.
Specific implementation mode
In the simplified schematic diagram of the invention shown in Fig. 1 to Figure 16, one end of drive shaft 1 sequentially passes through sealing cover 2, front end One end of lid 3 and valve plate 4, drive shaft is equipped with keyway 5, and end cover is connected with drive end bearing bracket.Drive shaft by two groups of bearings 6 with Drive end bearing bracket is connected, and adjusting pad 7 is equipped between two groups of bearings.It is equipped with inlet port 8 and press oil port 9 in the outside of drive end bearing bracket.Driving The other end of axis is connected with cylinder body 10, and valve plate is equipped between cylinder body and drive end bearing bracket.In the external sleeve joint shell body 11 of cylinder body, shell Surface be equipped with leakage hole 12.Plunger 13 is equipped in cylinder interior plunger hole, one end in plunger hole is equipped with spring base 14, Spring base is connected with one end of retracting spring 15, and the other end of retracting spring is located at the other end of plunger hole.In the bulb of plunger End is equipped with piston shoes 16, and one end of piston shoes is equipped with spherical concave surface corresponding with the bulb end of plunger, the end face in one end of piston shoes Porous media support pads 18 are equipped between rear end cap 17, porous media support pads are annular disk, on porous media support pads Equipped with through-hole.It is equipped with the porous disc placing groove 19 of annular at the middle part of rear end cap and logical liquid bath 20, porous media support pads are placed in In porous disc placing groove.In rear end cap upper bolt aperture 21 and a fabrication hole 22, rear end cap is connected with shell by screw 23. Grafting seal plug 24 in fabrication hole is internally provided with pressure oil bypass road A25, the both ends difference of pressure oil bypass road A in rear end cap It is connected to logical liquid bath, the fabrication hole of rear end cap, pressure oil bypass road A is connected to one end of pressure oil bypass road B26, pressure oil bypass road B The other end pass through rear end cap and enclosure interior, extend to the press oil port of drive end bearing bracket.Taper roll bearing 27 is fixed in shell The outer ring in portion, circular cone roller bearing is fixed on shell, and the inner ring socket of circular cone roller bearing is on the driving shaft.

Claims (4)

1. a kind of cam-type axial piston pump with porous media support pads, include mainly drive shaft, sealing cover, drive end bearing bracket, Valve plate, bearing, adjusting pad, cylinder body, shell, plunger, spring base, retracting spring, piston shoes, porous media support pads, rear end cap, Seal plug, pressure oil bypass road A, pressure oil bypass road B and taper roll bearing, it is characterised in that:It wears successively one end of drive shaft Sealing cover, drive end bearing bracket and valve plate are crossed, one end of drive shaft is equipped with keyway, and sealing cover is connected with drive end bearing bracket, and drive shaft passes through two Group bearing is connected with drive end bearing bracket, and adjusting pad is equipped between two groups of bearings, and inlet port and press oil port are equipped in the outside of drive end bearing bracket, The other end of drive shaft is connected with cylinder body, valve plate is equipped between cylinder body and drive end bearing bracket, in the external sleeve joint shell body of cylinder body, shell Surface be equipped with leakage hole, plunger is equipped in cylinder interior plunger hole, one end in plunger hole is equipped with spring base, spring base It is connected with one end of retracting spring, the other end of retracting spring is located at the other end of plunger hole, is equipped with and slides at the bulb end of plunger Boots, one end of piston shoes are equipped with spherical concave surface corresponding with the bulb end of plunger, the end face and rear end cap of one end of piston shoes it Between be equipped with porous media support pads, porous media support pads be annular disk, on porous media support pads be equipped with through-hole, in rear end The middle part of lid is equipped with the porous disc placing groove of annular and logical liquid bath, and porous media support pads are placed in porous disc placing groove, rear Screw hole and a fabrication hole are provided on end cap, rear end cap is connected with shell by screw, the grafting seal plug in fabrication hole Head is internally provided with pressure oil bypass road A in rear end cap, the both ends of pressure oil bypass road A respectively with logical liquid bath, the fabrication hole of rear end cap Connection, pressure oil bypass road A are connected to one end of pressure oil bypass road B, and the other end of pressure oil bypass road B passes through in rear end cap and shell Portion extends to the press oil port of drive end bearing bracket, and taper roll bearing is fixed inside housings, and the outer ring of taper roll bearing is fixed on shell On body, the inner ring socket of taper roll bearing is on the driving shaft.
2. a kind of cam-type axial piston pump with porous media support pads according to claim 1, it is characterised in that: The porous media support pads of annular, outer diameter 78mm, internal diameter 25mm, thickness 5mm;Porosity is 15% ~ 25%.
3. a kind of cam-type axial piston pump with porous media support pads according to claim 1, it is characterised in that: The logical liquid bath outer diameter of rear end cap is 60mm, internal diameter 50mm, thickness 5mm.
4. a kind of cam-type axial piston pump with porous media support pads according to claim 1, it is characterised in that: The diameter of pressure oil bypass road A and pressure oil bypass road B are 5mm.
CN201710198836.0A 2017-03-29 2017-03-29 A kind of cam-type axial piston pump with porous media support pads Active CN106837727B (en)

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CN201710198836.0A CN106837727B (en) 2017-03-29 2017-03-29 A kind of cam-type axial piston pump with porous media support pads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710198836.0A CN106837727B (en) 2017-03-29 2017-03-29 A kind of cam-type axial piston pump with porous media support pads

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CN106837727B true CN106837727B (en) 2018-07-31

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107269513B (en) * 2017-08-18 2021-03-23 杭州力龙液压有限公司 Swash plate, swash plate type plunger pump and hydraulic transmission system
CN110067724A (en) * 2019-03-13 2019-07-30 钟彪 A kind of sliding plate supporting type axis plunger pump or motor
CN111237155A (en) * 2020-02-28 2020-06-05 燕山大学 Through-shaft axial piston pump capable of realizing energy recovery

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1355325A (en) * 1971-12-27 1974-06-05 Aisin Seiki Hydraulic axial plunger pumps or motors
JP4801288B2 (en) * 2001-07-05 2011-10-26 カルソニックハリソン株式会社 Swash plate for car air conditioner and its manufacturing method
DE102011053659A1 (en) * 2011-09-15 2013-03-21 Linde Material Handling Gmbh Hydrostatic axial piston machine e.g. bent-axis piston machine has leakage oil guidance section provided in rotatable drum arranged within housing, for guiding leakage oil of thruster to suction device connected with exhaust port
CN204921279U (en) * 2015-07-11 2015-12-30 邵阳维克液压股份有限公司 A axial plunger pump that is used for railway hydraulic pressure to remove
CN105889057B (en) * 2016-05-05 2017-10-13 北京航空航天大学 Piston shoes and axial plunger pump with porous media material

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