CN2654897Y - Low friction wear pure water hydraulic axial plunger pump/motor - Google Patents

Low friction wear pure water hydraulic axial plunger pump/motor Download PDF

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Publication number
CN2654897Y
CN2654897Y CN 200320107934 CN200320107934U CN2654897Y CN 2654897 Y CN2654897 Y CN 2654897Y CN 200320107934 CN200320107934 CN 200320107934 CN 200320107934 U CN200320107934 U CN 200320107934U CN 2654897 Y CN2654897 Y CN 2654897Y
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CN
China
Prior art keywords
cylinder
plunger
hole
thrust
pure water
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Expired - Fee Related
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CN 200320107934
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Chinese (zh)
Inventor
周华
杨华勇
龚国芳
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN 200320107934 priority Critical patent/CN2654897Y/en
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Publication of CN2654897Y publication Critical patent/CN2654897Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a pure water hydraulic axial piston pump/motor with low friction and wear, the natural water (comprising freshwater and seawater) after filtration is used as the working medium. The utility model comprises a casing and a rotatable cylinder block arranged in the casing. The utility model is characterized in that a plurality of odd number cylinder holes are uniformly arranged on a same circumference of the cylinder block; the cylinder holes are parallel to a driving/output shaft; a plunger of a plunger-sliding shoe component is arranged in the cylinder hole; a flow distribution sleeve is arranged at the other head of the cylinder hole; the other end of the flow distribution sleeve is arranged in the corresponding hole on a thrust plate; the thrust plate floats corresponding to the cylinder block so as to automatically compensate error of parts processing and mounting; one end of a central spring presses the thrust plate on a port plate through tightly pressing a plastic rod; the other end of the central spring presses the sliding shoe on a swashplate through the cylinder block, a spherical hinge and a return plate; and the driving/output shaft is connected with the cylinder through interference fit. The utility model has the advantages of direct water lubrication and cooling of all friction pairs, small radial dimension, small volume, light weight and large specific power.

Description

A kind of pure water hydraulics axial plunger pump/motor of low fretting wear
Affiliated technical field
The utility model relates to the energy conversion device in the hydraulic transmission, relates in particular to a kind of pure water hydraulics axial plunger pump/motor of low fretting wear.
Background technique
The pure water hydraulics drive technology as hydraulic medium, has advantages such as cleaning, pollution-free, no fire hazard with the natural water (containing seawater and fresh water) after filtering.Last decade comes, the hydraulic element of the development of new material, the progress of processing technique and new structure are succeeded in developing, overcome that early stage hydraulic pressure transmission exists such as perishable, easy to wear, leak shortcomings such as big, that efficient is low, make the pure water hydraulics drive technology obtain significant progress, beginning extensively enters industrial application such as food, papermaking, weaving, medical apparatus, fire-fighting, metallurgy, mining, atomic power factory, ocean development.
The pure water hydraulics pump/motor is the crucial dynamical element in the pure water hydraulics system, and its performance index have directly determined the performance index of whole pure water hydraulics system.Up to the present, the pure water hydraulics pump/motor that has developed mainly contains following two kinds of representative structures:
First kind is oil-water separation, valve ported axial plunger formula structure.This structure adopts the cone valve flow, and plunger and cylinder hole are axial distribution on the circumference with respect to main shaft, relies on swash plate and central spring to realize the to-and-fro motion of plunger.Flow-distributing valve and cylinder hole are immersed in the water, other main friction pairs (as at the bottom of plunger ball and piston shoes ball-and-socket, the piston shoes boots and swash plate, bearing etc.) be immersed in the oil.For preventing that profit from ganging up, must on plunger and cylinder hole friction pair, add sealing profit is isolated.Depend on the life-span of seal ring whole device lifetime.This kind structure is at the initial stage of pure water hydraulics technical development, a kind of transitional technology that proposes for a difficult problem that solves the shortage of water lubrication friction pair material.
Second kind is fully water lubricating, valve flow radial plunger type structure.Representative is a German Hauhinco company.This structure adopts the flap type flow, and plunger and cylinder hole are radial equipartition on the circumference with respect to main shaft, and the eccentric wheel on the dependence main shaft and the retracting spring of each plunger root are realized the to-and-fro motion of plunger.All friction pairs are all directly used water lubrication and cooling.This structure radial dimension is big, and whole device volume is big, and specific power is little.
Summary of the invention
The purpose of this utility model is to provide a kind of pure water hydraulics axial plunger pump/motor of low fretting wear, and the natural water (containing fresh water and seawater) after its utilization is filtered no longer needs any other oiling agent as pressure working medium and lubricant medium.
In order to achieve the above object, the technical solution adopted in the utility model is that it comprises: by left end cap, right end cap, the shell that housing is formed, cylinder body bearing hole in the shell is equipped with cylinder body, be evenly equipped with odd number cylinder hole on the same circumference of cylinder body with the Boring mill line parallel, plunger in the plunger piston slippery boots assembly places in the cylinder hole, constitute trunk piston set with plunger, cylinder body one end is equipped with thrust button, place an end of the spring of cylinder body center hole thrust button to be pressed on the thrust plate through compressing plastic rod, thrust button and thrust plate constitute friction pair-flow pair, the central spring the other end passes through cylinder body, the ball pivot that cylinder body is outer, the outer backhaul dish of ball pivot is pressed in the piston shoes in each plunger piston slippery boots assembly on the swash plate, the sliding bearing that one end of driving/output shaft passes the left end cap center inserts the cylinder body center, constitute interference fit with cylinder body, each flow overlaps an end and correspondingly packs in the cylinder hole, the other end of flow cover is packed on the thrust button in the corresponding hole, thrust button is unsteady with respect to cylinder body, at the right end cap center flow pillar is housed, flow pillar and locating stud are fixed on thrust plate on the right end cap, two other locating stud is fixed on swash plate on the left end cap, all has the water guide groove in sliding bearing and the cylinder body bearing.
The plunger of plunger piston slippery boots assembly places in the cylinder hole, and the plunger of cylinder hole inwall injection moulding engineering plastics layer and metal constitutes trunk piston set.
The odd number cylinder hole that is evenly equipped with on the same circumference of cylinder body with the Boring mill line parallel is 7 or 9.
Said piston shoes comprise: the semicircle matrix that metallic material is made, in the matrix ball-and-socket, outside the matrix cylndrical surface, the matrix side covers the engineering plastics layer, be coated with the ball-and-socket of engineering plastics layer and the bulb of plunger and constitute the ball-and-socket pair, pack in the backhaul dish hole in the matrix cylndrical surface that is coated with the engineering plastics layer, the side and the swash plate that are coated with the engineering plastics layer constitute the piston shoes pair.
The useful effect that the utlity model has is:
This device adopts the thrust plate valve plate distribution, leans on swash plate and central spring to realize the to-and-fro motion of plunger; All friction pairs are all directly used water lubrication, cooling, and radial dimension is little, and volume is little, and is in light weight, and specific power is big.
Driving/output shaft and cylinder body are interference fit.The concentricity height of cylinder body and driving/output shaft like this, the cylinder body running steadily.The length of driving/output shaft is short, and the deformation of axle is little.The axial dimension of pump/motor is little, whole apparatus structure compactness.
The flow cover all has certain radial clearance with cylinder hole and thrust button, and thrust button can be floated with respect to cylinder body.Unsteady valve plate distribution can compensate part processing and installation errors automatically.All there is O shape rubber seal at flow cover two ends.Guarantee that high pressure water does not leak from the radial clearance of flow cover.
Left side sliding bearing is installed in the left end cap support drive/output shaft; The cylinder body bearing is installed in the housing, supports cylinder body.Driving/output shaft is not subjected to the effect of moment of flexure substantially like this, only bears moment of torsion, thereby has reduced the wearing and tearing of axle, has prolonged the working life of axle.
The main friction pairs pairing material is rustless metal material and engineering plastics, corrosion resistance, intensity, toughness and the rigidity of component in the pure water hydraulics axial plunger pump/motor had both been guaranteed, tribological properties such as the selflubricating of each friction pair, wear-resistant, damping have been guaranteed again, can avoid effectively at a high speed, adhesive wear, corrosive wear and the phenomenon such as stuck of friction pair under the situation of heavy duty, water lubrication, effectively improved functional reliability and working life.
Description of drawings
Fig. 1 is a structural principle schematic representation of the present utility model;
Fig. 2 is the enlarged view of plunger piston slippery boots assembly.
Among the figure: 1 key, 2 driving/output shafts, 3 baffle plates, 4 envelopes, 5 sliding bearings, 6 left end caps, 7 housings, 8 swash plates, 9 piston shoes, 10 plungers, 11 central spring, 12O shape rubber seal, 13 flow covers, 14 thrust buttons, 15 thrust plates, 16 right end caps, 17 thrust plate pillars, 18 locating studs, 19 compress and mould rod, 20 cylinder bodies, 21 cylinder body bearings, 22 ball pivots, 23 backhaul dishes.
Embodiment
As shown in Figure 1 and Figure 2, the utility model comprises that being installed in the shell rotatable cylinder body 20 by a shell (comprising left end cap 6, right end cap 16, housing 7) and one forms.The cylinder hole of even distribution and cylinder body 20 parallel axes on the cylinder body 20 same circumference, the plunger 10 of plunger piston slippery boots assembly places in the cylinder hole, and the plunger 10 that cylinder hole inwall is injected with engineering plastics and rustless metal material is made into trunk piston set.Cylinder body 20 the right are thrust buttons 14.The central spring 11 that places cylinder body 20 centers is by cylinder body, and ball pivot 22 and backhaul dish 23 compress the piston shoes 9 of each plunger piston slippery boots assembly with swash plate 8.The other end of central spring 11 is pressed to thrust plate 15 by compressing plastic rod 19 with thrust button 14.Thrust button 14 and thrust plate 15 constitute a pair of friction pair---flow pair.Flow cover 13 couples together cylinder body 20 and thrust button 14, and thrust button 14 is rotated with cylinder body 20.Flow overlaps 13 1 ends packs in the cylinder hole, and the other end is packed on the thrust button 14 in the corresponding hole.Flow cover 13 all has certain radial clearance with cylinder hole 20 and thrust button 14, and thrust button 14 can be floated with respect to cylinder body 20.Flow overlaps 13 two ends all O shape rubber seal 12, guarantees that high pressure water does not leak from the radial clearance of flow cover.Flow pillar 17 and locating stud 18 are fixed on thrust plate 15 on the right end cap 16.One end of driving/output shaft 2 passes the sliding bearing 5 at left end cap 6 centers, and axle head has keyway, fitting key 1; The other end inserts cylinder body 20 centers, with cylinder body 20 interference fit.Two locating studs 18 are fixed on swash plate 8 on the left end cap 6.Axle 2 is by sliding bearing 5 supportings, and 21 supportings of cylinder body 20 cylinder body bearings all have some water guide grooves in sliding bearing 5 and the cylinder body bearing 21, water has been introduced lubricated and cooling action.The water guide groove of cylinder body bearing 21 also has been communicated with the water cavity of the right and left.Shaft end seal relies on skeleton axle envelope 4 to finish, and skeleton axle envelope 4 outsides are baffle plates 3.
When the utility model device uses as pump, pump water process is such: live axle 2 drives cylinder body 20, thrust button 14, the plunger piston slippery boots assembly rotation, central spring 11 is by cylinder body 20, ball pivot 22 and backhaul dish 23 on average are applied to active force on each piston shoes 9, slide to be close to all the time on swash plate 8 inclined-planes at the bottom of the boots that guarantee piston shoes 9, thereby realize plunger 10 constantly to-and-fro motion in the cylinder hole.When plunger 10 moved to the limit on the left position left, corresponding waist shape window was formed sealing by thrust plate 15 complete hidings on the thrust button 14 in the cylinder hole.Rotation along with live axle 2, piston shoes 9 are being close to slip on the swash plate 8 under the effect of spring force, driving plunger 10 moves right, the enclosed volume in cylinder hole is reduced, water pressure rises, and the high pressure waist shape window of the waist shape window of thrust button 14 and thrust plate 15 is communicated with then, and the high pressure water in the cylinder hole is constantly discharged by plunger 10, high pressure waist shape window through thrust plate 15 arrives delivery side of pump, has realized the drainage procedure of pump.When plunger 10 moves to its limit on the right-right-hand limit position, the volume in cylinder hole can not increase again, corresponding waist shape window is also by thrust plate 15 complete hidings on this moment thrust button 14, form sealing in the cylinder hole again, along with live axle 2 is rotated further, cylinder hole enclosed volume increases, water pressure reduces, the low pressure waist shape window of the waist shape window of thrust button 14 and thrust plate 15 is communicated with then, and low-pressure water constantly enters the cylinder hole through thrust plate 15 from the inlet of pump, finishes the water absorption course of pump.Rotation along with live axle 2, each cylinder hole is with continuous suction water, and a plurality of plungers 10 are independently finished the suction water conservancy project separately by certain precedence and are done, and the high pressure water that each plunger 10 is discharged is in the orderly stack of delivery side of pump, thereby pump flow high pressure water uniformly continuously.
When this device used as motor, working procedure was the inverse process of pump work process.
All friction pairs of this device all directly adopt water lubrication and cooling, comprise cylinder hole and plunger, plunger ball and piston shoes ball-and-socket, at the bottom of the piston shoes boots and swash plate, thrust button and thrust plate, driving/output shaft and left sliding bearing, cylinder body and cylinder body bearing, ball pivot and backhaul dish etc.Specifically be achieved in that
Between cylinder hole and the plunger 10 certain interval is arranged, realize sealing by this gap.In drainage procedure, be high pressure water in the cylinder hole, form the height pressure difference in cylinder hole and plunger 10 seal clearance two ends, make that the high pressure water in the cylinder hole leaks in the housing of low pressure by seal clearance.This part is leaked the pressure of water in the gap and reduced successively, and suitable bearing capacity is arranged, and for cylinder hole and plunger 10 friction pairs, has played support, and is lubricated, cooling action.
High pressure water in the cylinder hole is also by the plunger center hole, and the plunger ball center hole arrives plunger ball and piston shoes ball-and-socket friction pair, lubricate; Pass through the piston shoes center hole again and arrive at the bottom of piston shoes 9 boots and the swash plate friction pair, form hydrostatic support.
All have many water guide grooves in left side sliding bearing 5 and the cylinder body bearing 21, the water in the housing is introduced wherein, two pairs of bearing pairs are played lubricated and cooling action.
The main friction pairs of this device all adopts rustless metal material allotment of labor engineering plastics, and this pairing has the characteristic of corrosion-resistant, wear-resistant and selflubricating, can effectively guarantee to obtain under the water lubrication condition enough reliability and working life.Concrete condition is as follows:
Bearing pair has two: sliding bearing 5 and driving/output shaft 2, cylinder body bearing 21 and 20, two sliding bearings of cylinder body all adopt engineering plastics to make fully, and axle 2 and cylinder body 20 are the rustless metal material.Typed ball bearing pair is ball pivot 22 and backhaul dish 23, wherein ball pivot 22 is the rustless metal material, and backhaul dish 23 comprises two-part, and first portion is the matrix of rustless metal material, second portion is the ball-and-socket that injects engineering plastics in matrix, and it cooperates the formation typed ball bearing pair with ball pivot 22.Cylinder body 20 also comprises two-part, and first portion is the matrix of rustless metal material, and second portion is the engineering plastics of injection moulding within the cylinder hole of cylinder body matrix, and the plunger of it and rustless metal material is formed trunk piston set.Piston shoes 9 also divide two-part, and first portion is a rustless metal material matrix 9.1, and second portion is the engineering plastics 9.2 with the end face injection moulding that contacts with swash plate at its ball-and-socket place, and it becomes the ball-and-socket pair with the bulb-type of plunger 10, with the inclined-plane formation piston shoes pair of swash plate 8.In the middle of the thrust plate 15 is metallic matrix, and injection moulding engineering plastics in two sides are with the thrust button 14 formation flow pairs of rustless metal material.
In a word, the used main friction pairs pairing material of the utility model device is rustless metal material and engineering plastics, corrosion resistance, intensity, toughness and the rigidity of component in the axial pump/motor of pure water hydraulics had both been guaranteed, tribological properties such as the selflubricating of each friction pair, wear-resistant, damping have been guaranteed again, can avoid effectively at a high speed, adhesive wear, corrosive wear and the phenomenon such as stuck of friction pair under the situation of heavy duty, water lubrication, effectively improved functional reliability and working life.

Claims (4)

1, a kind of pure water hydraulics axial plunger pump/motor of low fretting wear, it is characterized in that it comprises: by left end cap (6), right end cap (16), the shell that housing (7) is formed, cylinder body bearing (21) endoporus in the shell is equipped with cylinder body (20), be evenly equipped with odd number cylinder hole on the same circumference of cylinder body (20) with cylinder body (20) parallel axes, plunger in the plunger piston slippery boots assembly (10) places in the cylinder hole, constitute trunk piston set with plunger (10), cylinder body (20) one ends are equipped with thrust button (14), place an end of the spring (11) of cylinder body (20) center hole thrust button (14) to be pressed on the thrust plate (15) through compressing plastic rod (19), thrust button (14) and thrust plate (15) constitute friction pair-flow pair, central spring (11) the other end is by cylinder body (20), the ball pivot (22) that cylinder body is outer, the outer backhaul dish (23) of ball pivot is pressed in the piston shoes in each plunger piston slippery boots assembly (9) on the swash plate (8), the sliding bearing (5) that one end of driving/output shaft (2) passes left end cap (6) center inserts cylinder body (20) center, constitute interference fit with cylinder body (20), each flow cover (13) one end is correspondingly packed in the cylinder hole, the other end of flow cover (13) is packed in the last corresponding hole of thrust button (14), thrust button (14) is unsteady with respect to cylinder body (20), at right end cap (16) center flow pillar (17) is housed, flow pillar (17) and locating stud (18) are fixed on thrust plate (15) on the right end cap (16), two other locating stud (18) is fixed on swash plate (8) on the left end cap (6), all has the water guide groove in sliding bearing (5) and the cylinder body bearing (21).
2, according to the pure water hydraulics axial plunger pump/motor of the described a kind of low fretting wear of claim 1, it is characterized in that: the plunger of plunger piston slippery boots assembly (10) places in the cylinder hole, and the plunger (10) of cylinder hole inwall injection moulding engineering plastics layer and metal constitutes trunk piston set.
3, according to the pure water hydraulics axial plunger pump/motor of the described a kind of low fretting wear of claim 1, it is characterized in that: the odd number cylinder hole that is evenly equipped with on the same circumference of cylinder body (20) with cylinder body (20) parallel axes is 7 or 9.
4, according to the pure water hydraulics axial plunger pump/motor of the described a kind of low fretting wear of claim 1, it is characterized in that said piston shoes (9) comprising: the semicircle matrix (9.1) that metallic material is made, in matrix (9.1) ball-and-socket, outside the matrix cylndrical surface, the matrix side covers engineering plastics layers (9.2), be coated with the ball-and-socket of engineering plastics layer and the bulb of plunger (10) and constitute the ball-and-socket pair, pack in backhaul dish (23) hole in the matrix cylndrical surface that is coated with the engineering plastics layer, the side and the swash plate (8) that are coated with engineering plastics constitute the piston shoes pair.
CN 200320107934 2003-11-06 2003-11-06 Low friction wear pure water hydraulic axial plunger pump/motor Expired - Fee Related CN2654897Y (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979875A (en) * 2010-10-21 2011-02-23 吴赛珍 Compact high-pressure plunger variable double pump
CN102155371A (en) * 2011-03-30 2011-08-17 浙江大学 Reverse osmosis sea water desalinization high-pressure pump
CN102155370A (en) * 2011-03-30 2011-08-17 浙江大学 Pure water hydraulic through-shaft type spherical distribution axial plunger pump
CN102305170A (en) * 2011-05-25 2012-01-04 中国兵器工业集团第七○研究所 Hydraulic return plunger motor
CN105736274A (en) * 2016-02-24 2016-07-06 湖北仁创科技有限公司 Water hydraulic axial plunger pump provided with pressure-limiting and overflow device
CN101772645B (en) * 2007-08-07 2016-09-28 罗伯特-博希股份公司 Hydrostatic machine including the adjusting apparatus with control and regulation valve return element

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101772645B (en) * 2007-08-07 2016-09-28 罗伯特-博希股份公司 Hydrostatic machine including the adjusting apparatus with control and regulation valve return element
CN101979875A (en) * 2010-10-21 2011-02-23 吴赛珍 Compact high-pressure plunger variable double pump
CN102155371A (en) * 2011-03-30 2011-08-17 浙江大学 Reverse osmosis sea water desalinization high-pressure pump
CN102155370A (en) * 2011-03-30 2011-08-17 浙江大学 Pure water hydraulic through-shaft type spherical distribution axial plunger pump
CN102305170A (en) * 2011-05-25 2012-01-04 中国兵器工业集团第七○研究所 Hydraulic return plunger motor
CN105736274A (en) * 2016-02-24 2016-07-06 湖北仁创科技有限公司 Water hydraulic axial plunger pump provided with pressure-limiting and overflow device

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