CN104153986B - The axial plunger type hydraulic pump of hydraulic pressure backhaul - Google Patents
The axial plunger type hydraulic pump of hydraulic pressure backhaul Download PDFInfo
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- CN104153986B CN104153986B CN201410357509.1A CN201410357509A CN104153986B CN 104153986 B CN104153986 B CN 104153986B CN 201410357509 A CN201410357509 A CN 201410357509A CN 104153986 B CN104153986 B CN 104153986B
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- slippery boots
- swash plate
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- piston slippery
- boots assembly
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Abstract
The embodiment of the invention discloses the axial plunger type hydraulic pump of a kind of hydraulic pressure backhaul, relate to technical field of hydraulic pressure, solve the problem that plunger wear is excessive.The axial plunger type hydraulic pump of the present invention a kind of hydraulic pressure backhaul, including two end caps and the shell of the housing composition with through hole, it is provided with cylinder body in described through hole, it is provided with swash plate between cylinder body and one of them end cap, it is laid with cylinder holes according to circumference array vertically on described cylinder body, in cylinder holes, is respectively equipped with plunger piston slippery boots assembly；One end that each plunger piston slippery boots assembly is exposed to outside cylinder holes compresses with swash plate, and it is provided with hydraulic cavities between each plunger piston slippery boots assembly and the inwall of corresponding cylinder holes, the intercommunicating pore of hydraulic cavities it is communicated with on cylinder body, when described plunger piston slippery boots assembly moves in cylinder holes, hydraulic cavities volume reduces, and described plunger piston slippery boots assembly hydraulic cavities volume when swash plate moves increases.The embodiment of the present invention is used primarily in various hydraulic pump, especially in the hydraulic pump of fully water lubricating.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, particularly relate to the axial plunger type hydraulic pump of hydraulic pressure backhaul.
Background technology
Pluger type hydraulic pump is that technical field of hydraulic pressure uses more high-pressure pump, in order to allow hydraulic pump cylinder holes in
Produce negative pressure to suck the liquid needing supercharging, it usually needs the plunger in cylinder holes is connected to return plate
On one end face, and another end face of return plate needs mortgage on swash plate, and wherein return plate is arranged on
On ball pivot.
When being moved by driven by motor hydraulic pump, return plate drives plunger to do piston movement in cylinder holes, real
The supercharging of existing liquid, uses the mode of this return plate to realize the piston movement of plunger, needs to arrange more
Parts, cause relatively costly, assembling complexity；And return plate can produce bigger radial effect to plunger
Power, causes plunger relatively big, so that the abrasion of plunger is more with the friction of cylinder holes during piston movement.
Summary of the invention
The technical problem to be solved is to overcome the deficiencies in the prior art to provide a kind of assembling simple
The axial plunger type hydraulic pump of hydraulic pressure backhaul.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
The axial plunger type hydraulic pump of a kind of hydraulic pressure backhaul, including two end caps and the housing composition with through hole
Shell, be provided with cylinder body in described through hole, between cylinder body and one of them end cap, be provided with swash plate, described cylinder body
On be laid with cylinder holes according to circumference array vertically, be respectively equipped with plunger piston slippery boots assembly in cylinder holes；Each plunger
One end that slippery boots assembly is exposed to outside cylinder holes compresses with swash plate, and each plunger piston slippery boots assembly and corresponding cylinder holes
Inwall between be provided with hydraulic cavities, cylinder body is communicated with the intercommunicating pore of hydraulic cavities, described plunger piston slippery boots assembly
In cylinder holes, during motion, hydraulic cavities volume reduces, and described plunger piston slippery boots assembly is hydraulic cavities volume when swash plate moves
Increase.
Preferably, being filled with liquid in described hydraulic cavities, in cylinder holes, the plunger piston slippery boots assembly of motion is to hydraulic pressure
The volume in chamber is compressed, and the liquid in this hydraulic cavities presses to other hydraulic cavities, and drives the plunger of correspondence
Slippery boots assembly moves to swash plate.
Preferably, described cylinder holes is stepped hole, and the bigger one end of stepped hole mesoporous is towards swash plate, institute
State plunger piston slippery boots assembly and be provided with the step post mated with stepped hole.
Preferably, described stepped hole is the stepped hole of at least two-stage.
Preferably, on described step post, the face area ratio of the face area of maximum cylinder and minimum cylinder is:
1.15 to 1.75.
Preferably, it is provided with sealing member between axial sides and the plunger piston slippery boots assembly of described stepped hole, and leans on
Sealing between stepped hole and the plunger piston slippery boots assembly of nearly swash plate one end is higher than the one end away from swash plate.
Preferably, described sealing member is provided with the flange that the step end face with stepped hole interlocks.
Preferably, described swash plate and end cap are fixing is connected and without relative motion, plunger piston slippery boots assembly is in cylinder holes
Move in a circle on swash plate while doing piston movement.
Preferably, thrust button and valve plate, thrust button and flow it are sequentially provided with between cylinder body and another end cap
Dish is provided with liquid inlet, is provided with the communication gap being positioned at liquid inlet, institute between thrust button and valve plate
Stating and be communicated with passage between cylinder body lateral wall and housing, the cavity between cylinder body with swash plate is connected by described
Passage connects with liquid inlet with communication gap.
Preferably, the liquid filled in described hydraulic cavities and cylinder holes need the liquid phase of supercharging together.
The axial plunger type hydraulic pump of the hydraulic pressure backhaul that the present invention provides, in plunger piston slippery boots assembly and corresponding cylinder holes
Inwall between be provided with hydraulic cavities, cylinder body is communicated with the intercommunicating pore of hydraulic cavities, by the liquid in hydraulic cavities
Body realizes plunger piston slippery boots assembly can do reciprocating-piston motion, and this type of drive eliminates return plate, permissible
Reduce centrifugal force, thus reduce the abrasion of plunger piston slippery boots assembly.And saving return plate, corresponding parts are also
Just reduce, without spring and ball pivot, thus the assembling of hydraulic pump can be simplified.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of hydraulic pump in prior art；
Fig. 2 is the structural representation of hydraulic pump in the embodiment of the present invention；
Fig. 3 is part A partial enlarged drawing in Fig. 2；
Fig. 4 is part B partial enlarged drawing in Fig. 2；
Fig. 5 is the C-C sectional view of cylinder body in Fig. 2；
Fig. 6 is the structural representation that in the embodiment of the present invention, cylinder body uses two-stage stepped hole；
Fig. 7 is backhaul circle and the assembling schematic diagram of swash plate in the embodiment of the present invention；
Fig. 8 is D part partial enlarged drawing in Fig. 2；
Fig. 9 is E part partial enlarged drawing in Fig. 2.
Reference: 10-end cap, 11-through hole, 20-housing, 30-cylinder body, 31-cylinder holes, 32-hydraulic cavities,
33-intercommunicating pore, 34-sealing member, 35-flange, 36-communicating passage, 40-plunger piston slippery boots assembly, 41-plunger,
42-piston shoes, 43-directive wheel, 44-cervical region, 50-swash plate, 60-rotating shaft, 70-thrust button, 71-liquid inlet,
72-communication gap, 75-valve plate, 80-mechanical sealing assembly, 81-axial seal, 82-the first installed part,
83-the second installed part, 84-O RunddichtringO, 90-backhaul circle, the ring-type damper portion of 91-, between 92-first fluid
Gap, 93-starts supporting part, 94-gathering sill, 95-second fluid gap, 96-the first installation portion, 97-second
Installation portion；
100-cylinder body, 200-plunger piston slippery boots assembly, 300-return plate, 400-swash plate, 500-rotating shaft, 600-
Ball pivot.
Detailed description of the invention
Axial plunger type hydraulic pump of the prior art is as it is shown in figure 1, this hydraulic pump includes cylinder body 100, plunger
Slippery boots assembly 200 and return plate 300, and plunger piston slippery boots assembly 200 assembles with return plate 300, return plate
300 compress with swash plate 400, by the rotation of cylinder body 100 so that plunger piston slippery boots assembly 200 and return plate
300 entirety are moved relative to swash plate 400, are equivalent to drive plunger piston slippery boots by the rotation of return plate 300
Assembly 200 does piston movement in cylinder holes.Simultaneously as return plate is to do oblique circular motion, so,
Being provided with ball pivot 600 in rotating shaft 500, return plate 300 is hinged on ball pivot 600.
The hydraulic pump of ball pivot and return plate structure is more than used to have following defects that
One, return plate and ball pivot take the larger space within hydraulic pump, cause hydraulic pump entirety to manufacture volume
Bigger.
Two, return plate moves in a circle together along with plunger piston slippery boots assembly, causes acting on plunger piston slippery boots assembly
On centrifugal force relatively big so that there is bigger opposing force between plunger piston slippery boots assembly and cylinder holes,
Cause plunger piston slippery boots assembly to be easily worn at cylinder holes friction, and the position easily worn and torn is for towards swash plate
One end.It addition, return plate directly produces active force to plunger piston slippery boots assembly, plunger piston slippery boots group also can be made
Part is easily worn at cylinder holes friction.
Three, return plate belongs to plunger piston slippery boots assembly and directly contacts connection, causes and there is relatively your writing between the two
Firmly, easily cause plunger piston slippery boots assembly and produce increased wear with return plate contact position.
Four, the scheme of return plate and ball pivot is used, in addition it is also necessary to provide respective action power by spring, cause liquid
The parts of press pump mounted inside are more, the most relatively costly, also make to assemble complex.
In order to overcome the defect of hydraulic pump in prior art, the embodiment of the present invention provides a kind of axial piston liquid
Press pump, below in conjunction with the accompanying drawing in the embodiment of the present invention, is carried out the technical scheme in the embodiment of the present invention
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and not
It it is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the property made work premise, broadly falls into the scope of protection of the invention.
The present invention provides the axial plunger type hydraulic pump of a kind of hydraulic pressure backhaul, as in figure 2 it is shown, this axial plunger
Formula hydraulic pump includes that two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this hydraulic pump,
And it is provided with through hole in housing 20, the cylinder body 30 being provided with in this through hole between two end caps, described cylinder body
It is laid with cylinder holes 31 according to circumference array vertically on 30, in cylinder holes, is respectively equipped with plunger piston slippery boots assembly 40, logical
Cross the plunger piston slippery boots assembly 40 in each cylinder holes 31 and carry out piston movement in turn, it is achieved the supercharging to liquid,
Liquid can also be realized and provide the motor of power, in order to overcome the defect of prior art, in the embodiment of the present invention
One end that each plunger piston slippery boots assembly is exposed to outside cylinder holes compresses with swash plate, save in prior art return plate and
Ball pivot.On the basis of this inventive concept, the embodiment of the present invention also provides for below embodiment.
Embodiment one
The embodiment of the present invention provides a kind of axial plunger type hydraulic pump using hydraulic pressure backhaul mode, such as Fig. 2 institute
Showing, this axial plunger type hydraulic pump includes that two end caps 10 and housing 20, end cap 10 and housing 20 composition should
It is provided with through hole in the shell of hydraulic pump, and housing 20, in this through hole, is provided with the cylinder between two end caps
Body 30, described cylinder body 30 is laid with cylinder holes 31 according to circumference array vertically, and described cylinder holes is 2 to 24
Individual, it is respectively equipped with plunger piston slippery boots assembly 40 in cylinder holes, by the plunger piston slippery boots assembly 40 in each cylinder holes 31
Carry out piston movement in turn, it is achieved the supercharging to liquid, it is also possible to realize liquid and the motor of power is provided.This
Inventive embodiments realizes plunger piston slippery boots assembly 40 and carries out the scheme of piston movement in turn as in figure 2 it is shown, at cylinder
Arranging swash plate 50 between body 30 and one of them end cap, each plunger piston slippery boots assembly 40 is exposed to outside cylinder holes
One end compresses with swash plate, no longer uses the scheme driven in prior art by return plate, but plunger is sliding
Boots assembly 40 is directly pressed on swash plate 50 so that in course of normal operation, and plunger piston slippery boots assembly can be
Rotate on swash plate.
Plunger piston slippery boots assembly 40 in the present invention includes plunger 41 and piston shoes 42, and wherein plunger 41 is arranged on cylinder
In hole 31, piston shoes 42 are pressed on swash plate 50, and are carried out by ball pivot between plunger 41 and piston shoes 42
Connect.
In order to plunger piston slippery boots assembly 40 do piston movement provide power, as shown in Figure 2, Figure 3, Figure 4,
The embodiment of the present invention is provided with hydraulic cavities 32 between each plunger piston slippery boots assembly 40 and the inwall of corresponding cylinder holes 31,
And it is communicated with the intercommunicating pore 33 (shown in Figure 5) of hydraulic cavities 32 on cylinder body 30, in hydraulic cavities 32
It is filled with the set-up mode of hydraulic cavities in liquid, and the present embodiment, so that plunger piston slippery boots assembly is to cylinder
In hole, during motion, hydraulic cavities volume reduces, and plunger piston slippery boots assembly hydraulic cavities volume when swash plate moves increases.
As it is shown on figure 3, the volume of hydraulic cavities is carried out when plunger piston slippery boots assembly 40 is pressed in cylinder holes by swash plate 50
Compression, owing to the volume of corresponding hydraulic cavities 32 reduces, so the liquid in corresponding hydraulic cavities is by intercommunicating pore 33
It flow to other hydraulic cavities so that the fluid pressure in other hydraulic cavities increases, as shown in Figure 4, other liquid
Pressure chamber realizes the increase of hydraulic cavities 32 volume in the case of fluid pressure increases, thus drives the plunger of correspondence
Slippery boots assembly 40 can move as swash plate 50 direction.Above movement mechanism acts on each plunger piston slippery boots in turn
Assembly, so that plunger piston slippery boots assembly does piston movement.
Preferably, when the pressure in hydraulic cavities increases, in order to drive plunger piston slippery boots assembly item swash plate side
To motion, as shown in Figure 4, cylinder holes 31 is designed as stepped hole by the embodiment of the present invention, this stepped hole mesopore
Bigger one end, footpath is towards swash plate 50, and is provided with the step post mated with stepped hole on plunger piston slippery boots assembly 40,
It is specifically the step post matched by plunger design, so that the step on stepped hole and step post
On step between formed hydraulic cavities 32, the other end of cylinder body is provided with space, when pressure increases, this
Pressure can act predominantly on the step surface of step post naturally, and promotes plunger piston slippery boots assembly 40 to swash plate 50
Move in direction.In addition to using the mode of stepped hole, those skilled in the art can also adopt real in other ways
The setting of existing hydraulic cavities, as redesigned the annular aperture of correspondence in cylinder holes, and designs the ring-type of correspondence on plunger
Bar, ring-type bar and annular aperture cooperatively form hydraulic cavities.On embodiment of the present invention step post, less one end is positioned at
It is provided with cannelure at step, thus reduces its abrasion.
During preferably due to the pressure in hydraulic cavities 32 promotes plunger 41 to move, big with motive force
Little relevant in addition to the pressure in hydraulic cavities, what another played a crucial role is the step area on step post
Size, in order to ensure that motive force can promote plunger piston slippery boots assembly to move to swash plate direction, can also protect simultaneously
Card plunger piston slippery boots assembly, to needing the pressurized effect of pressurized liquid, needs to ensure that on step post, front end promotes simultaneously
The minimum face area of supercharging and step post appear on the stage terrace size design, designer of the present invention passes through
Repeatedly design, repeatedly recruitment evaluation, finally think the face area of maximum cylinder and minimum cylinder on step post
Face area ratio when being designed as 1.15 to 1.75, corresponding effect is best, it is also possible to by plunger piston slippery boots
Volume design optimization.Generally, maximum when being relatively large in diameter of cylinder, above-mentioned face on step post
Long-pending ratio can select less design parameter, as when the diameter of maximum cylinder is more than 24mm, and now above-mentioned
Area ratio can select about 1.15 to 1.5；And when on step post, the diameter of maximum cylinder is less, above-mentioned
Area ratio then needs to select bigger design parameter, as when the diameter of maximum cylinder is less than 24mm, now
Above-mentioned area ratio can select 1.4 to 1.75；The selection mode using above-mentioned area ratio can either ensure to promote
Power, can ensure that again pressurized effect, it can also be ensured that plunger piston slippery boots assembly is unlikely to the heaviest.
Preferably, the stepped hole in the embodiment of the present invention selects one-level stepped hole to achieve that its technical purpose,
In order to ensure motive force, stepped hole can also be designed at least as the stepped hole of two-stage by the embodiment of the present invention, as
Use in Fig. 6 is exactly the two-stage step post of two-stage stepped hole and correspondence.
Preferably, as shown in Figure 2, Figure 3, Figure 4, the embodiment of the present invention is also in the axial side of described stepped hole
It is provided with sealing member 34 between face and plunger piston slippery boots assembly 40, liquid in hydraulic cavities 32 will be made by sealing member 34
Body is difficult to reveal, and the hydraulic pump certainly provided due to the present invention is used primarily under environment under high pressure, and hydraulic cavities is with outer
Boundary more or less there will be the circulation of some liquid, in order to ensure that hydraulic cavities 32 can be by plunger piston slippery boots assembly pressure
Sealing property in swash plate, the embodiment of the present invention uses following scheme: near the stepped hole of swash plate 50 one end
And the sealing between plunger piston slippery boots assembly is higher than the one end away from swash plate so that be difficult near swash plate 50 one end
Reveal, and bigger away from swash plate one end in general pressure, so the internal pressure leakage of hydraulic cavities will be relatively
Few, even if causing leakage because pressure is excessive, also there will be the liquid outside hydraulic cavities to hydraulic cavities internal leakage,
Thus the liquid in hydraulic cavities is played supplementary function, so that the pressure in hydraulic cavities can preferably be made
It is used on plunger piston slippery boots assembly 40.Certainly, more or less there will be some liquid due to hydraulic cavities with extraneous
Circulation, in order to ensure will not occur polluting to the liquid needing supercharging, fills in embodiment of the present invention hydraulic cavities
Liquid and cylinder holes need the liquid phase of supercharging with；As the hydraulic pump that the present invention provides is applied to sea water by us
Desalination field, then can fill sea water and can also fill fresh water, no matter fill sea water or fresh water in hydraulic cavities
Pollute all without to the sea water needing supercharging.
Preferably due to plunger is doing piston movement always, in order to prevent sealing member from coming off, as it is shown on figure 3,
The embodiment of the present invention is provided with the flange 35 that the step end face with stepped hole interlocks on sealing member 34, passes through flange
35 are buckled on step surface so that sealing member is difficult to from cylinder holes abjection.
Preferably, the hydraulic pump that the present invention provides can use but be not limited to following scheme:
First as in figure 2 it is shown, swash plate 50 and end cap 10 is fixing is connected and without relative motion, plunger piston slippery boots
Assembly moves in a circle while doing piston movement in cylinder holes on swash plate, is namely driven by rotating shaft 60
Cylinder body 30 rotates, and swash plate 50 is then fixed on end cap and does not rotates.
The second, cylinder body is fixed on shell, drives swash plate to rotate by rotating shaft, depend under the rotation of swash plate
Secondary plunger piston slippery boots assembly is pressed in cylinder holes.
Preferably due to the liquid in hydraulic cavities can leak out, in order to ensure liquid can overall circulation,
As it is shown in figure 9, the embodiment of the present invention is sequentially provided with between cylinder body 30 and another end cap 10 thrust button 70
It is provided with liquid inlet 71, thrust button 70 and valve plate with valve plate 75, thrust button 70 and valve plate 75
The communication gap 72 being positioned at liquid inlet 71 it is provided with between 75, and cylinder body 30 lateral wall and housing 20
Between be communicated with passage 36, the cavity between cylinder body and swash plate is by described communicating passage 36 and communication gap
72 connect with liquid inlet 17, so that the liquid leaked out can return to liquid by above-mentioned communicating position
Porch, all can discharge liquid when not using hydraulic pump.
Preferably, communicating passage 36 is set between above-mentioned cylinder body lateral wall and housing and can be distributed in cylinder discontinuously
Between body 30 lateral wall and housing 20, e.g., cylinder body 30 lateral wall arranges some communication groove discontinuously.
Embodiment two
The embodiment of the present invention provides a kind of wear-resistant axial plunger type hydraulic pump, and this hydraulic pump saves return plate,
And the abrasion of plunger piston slippery boots assembly is reduced by corresponding scheme, concrete as in figure 2 it is shown, this axial piston
Hydraulic pump includes that two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this hydraulic pump, and
And it is provided with through hole in housing 20, and the cylinder body 30 being provided with in this through hole between two end caps 10, described cylinder
It is laid with cylinder holes 31 according to circumference array vertically on body 30, in cylinder holes 31, is respectively equipped with plunger piston slippery boots assembly
40, carried out piston movement in turn by the plunger piston slippery boots assembly in each cylinder holes, it is achieved the supercharging to liquid,
Liquid can also be realized the motor of power is provided.The embodiment of the present invention realizes plunger piston slippery boots assembly carry out in turn
The scheme of piston movement as in figure 2 it is shown, arrange swash plate 50 between cylinder body 30 and one of them end cap 10,
One end that each plunger piston slippery boots assembly 40 is exposed to outside cylinder holes compresses with swash plate 50, no longer uses prior art
In the scheme that driven by return plate, but plunger piston slippery boots assembly is directly pressed on swash plate so that normal
In work process, plunger piston slippery boots assembly can rotate on swash plate.
In order to reduce the abrasion of plunger piston slippery boots assembly, as in figure 2 it is shown, the embodiment of the present invention is at swash plate and cylinder body
Between be provided with backhaul circle 90, in hydraulic pump course of normal operation, this backhaul circle 90 is not directly and plunger piston slippery boots
Assembly 40 contacts, and is only to shield plunger piston slippery boots assembly 40, as shown in Figure 2 and Figure 7, and institute
Stating backhaul circle 90 and include ring-type damper portion 91, described ring-type damper portion 91 is outside whole plunger piston slippery boots assemblies
The motion periphery of side, and and the lateral surface of plunger piston slippery boots assembly between be provided with fluid gap, specifically,
Owing to plunger piston slippery boots assembly moves in a circle along swash plate, outside the periphery of this circular motion, it is provided with ring
First fluid gap it is provided with between shape damper portion 91, and ring-type damper portion 91 and each plunger piston slippery boots assembly
92, owing to first fluid gap 92 being filled with fluid during hydraulic pump works, at plunger piston slippery boots assembly 40
During high speed rotating, the fluid in first fluid gap 92 produces centripetal force, energy to plunger piston slippery boots assembly
Enough offset the centrifugal force of most plunger piston slippery boots assembly 40, thus reduce plunger piston slippery boots assembly because of centrifugal force band
The abrasion come.Further, owing to the most directly contacting between ring-type damper portion 91 and plunger piston slippery boots assembly, but
Produce respective action power by fluid, so can reduce the active force of plunger piston slippery boots assembly, reduce its abrasion.
The embodiment of the present invention need not special fill liquid in fluid gap, hydraulic pump in the course of the work,
Liquid can flow in the cavity between swash plate and cylinder body, and concrete circulation path is referred to saying in embodiment one
Bright, here is omitted, and liquid in the cavities enters fluid gap and produces the plunger piston slippery boots assembly of motion
Raw centripetal force, thus play the effect of above-mentioned minimizing abrasion.
In the embodiment of the present invention, plunger piston slippery boots assembly realizes the type of drive of piston movement and can use embodiment one
Kind scheme, the most no longer describe in detail, certain those skilled in the art are it is also contemplated that other drive schemes.
As shown in Figure 2 and Figure 7, plunger piston slippery boots assembly includes the sliding part compressed with swash plate, and general plunger is sliding
Boots assembly 40 includes plunger 41 and piston shoes 42, and sliding part is arranged on piston shoes 42, the embodiment of the present invention
In the outside of sliding part formed motion periphery that arranges of ring-type damper portion 92 so that ring-type damper portion and
All form first fluid gap 92 between the motion periphery outside sliding part.
Owing to using the mode of hydraulic cavities to drive plunger piston slippery boots assembly to do piston movement, long-time not at hydraulic pump
In the case of work, the liquid in hydraulic cavities may leak, and causes driving plunger piston slippery boots assembly to do piston
Motion, in order to drive plunger piston slippery boots assembly to do piston movement, such as Fig. 2 hydraulic pump just starts when
Shown in Fig. 7, the backhaul circle 90 in the embodiment of the present invention also includes starting supporting part 93, starts supporting part
Form gathering sill 94 between 93 and swash plate 50, described plunger piston slippery boots assembly 40 be correspondingly provided with directive wheel 43,
Directive wheel is generally located on piston shoes 42, and directive wheel 43 moves in gathering sill 94, at the beginning of starting,
Directive wheel 43 is conflicted and is being started on supporting part 93, thus drives plunger piston slippery boots assembly 40 to transport along swash plate 50
Dynamic, form the plunger 41 piston movement in cylinder holes 31, after starting a period of time, in hydraulic cavities 32
Can fill out hydraulically full, thus be no longer necessary to conflict at startup supporting part.So, the embodiment of the present invention is in design
Time, the width design being directed to groove 94 becomes the thickness more than directive wheel 43 so that fill full liquid in hydraulic cavities
In the case of body, start supporting part 93 and be not required to directive wheel 43 is supported, thus play protection backhaul
The effect of circle 90.
In order to preferably protect plunger piston slippery boots assembly not to be worn, the embodiment of the present invention is also provided with second
Fluid gap, concrete set-up mode is as shown in Fig. 2, Fig. 3, Fig. 7, and plunger piston slippery boots assembly is provided with and directive wheel
43 cervical regions 44 connected, the described startup supporting part 93 motion periphery outside cervical region, start and support
Form second fluid gap 95 between motion periphery outside portion 93 and cervical region 44, be equivalent to start support
Portion serves the effect of a part of ring-type damper portion herein.Consequently, it is possible to the stream in first fluid gap 92
Body be then the outside to directive wheel produce centripetal force, the fluid in second fluid gap 95 be then to cervical region outside
Side produces centripetal force, is reduced the abrasion of plunger piston slippery boots assembly by above-mentioned two position centripetal force.
In order to protect directive wheel, between second fluid gap 95 is designed as less than first fluid by the embodiment of the present invention
Gap 92 so that fluid can act preferentially on cervical region, reduces the abrasion of directive wheel.In general, first-class
The size in body space and second fluid gap is required to less than 1mm.
Installing for convenience, the backhaul circle of the embodiment of the present invention is provided with installation portion, by installation portion by backhaul
Circle is arranged between cylinder body and swash plate, is particularly but not limited to following scheme:
The first, as shown in Figure 2 and Figure 7, backhaul circle 90 also includes from ring-type damper portion 91 towards swash plate
End face extends the first installation portion 96 formed, described first installation portion 96 be fixed on swash plate 50 and shell 20 it
Between.
The second, as shown in Figure 2 and Figure 7, backhaul circle 90 also includes from ring-type damper portion 91 towards cylinder body
End face extends the second installation portion 97 formed, and the second installation portion 97 is fixed between swash plate 50 and cylinder body 30.
Above first installation portion 96 and the second installation portion 97 can be arranged simultaneously, have above-mentioned ring-type damper portion,
Start supporting part, the first installation portion, the second installation portion backhaul coil structures as shown in Figure 7.Due to ring-type resistance
Buddhist nun portion is required for producing corresponding friction with starting supporting part, and the backhaul circle that the embodiment of the present invention provides can be adopted
With but be not limited to PEEK (polyether-ether-ketone) material or PA6 (nylon 6) material or POM (polyformaldehyde) material
Material is made, and improves its rub proofness, extends backhaul circle service life.
Embodiment three
Hydraulic pump of the prior art, owing to return plate and ball pivot take the larger space within hydraulic pump, leads
Causing hydraulic pump entirety and manufacture volume relatively greatly, the embodiment of the present invention provides a kind of compact axial plunger type hydraulic pump,
It is concrete as in figure 2 it is shown, this axial plunger type hydraulic pump includes two end caps 10 and housing 20, end cap 10 He
Housing 20 forms the shell of this hydraulic pump, and is provided with through hole in housing, is provided with and is positioned at two ends in this through hole
Cylinder body 30 between lid, described cylinder body 30 is laid with cylinder holes 31, cylinder holes 31 according to circumference array vertically
Inside it is respectively equipped with plunger piston slippery boots assembly 40, carries out piston in turn by the plunger piston slippery boots assembly 40 in each cylinder holes
Motion, it is achieved the supercharging to liquid, it is also possible to realize liquid and the motor of power is provided.
The backhaul scheme of the plunger piston slippery boots assembly in the embodiment of the present invention can use embodiment one and embodiment two
The scheme provided, i.e. uses hydraulic cavities to carry out hydraulic pressure backhaul, and uses backhaul circle to reduce abrasion, the most no longer
Repeat.
In order to reduce the design length of hydraulic pump, in the embodiment of the present invention, each plunger piston slippery boots assembly is exposed to cylinder
One end outside hole directly compresses with swash plate 50, can save return plate and ball pivot, turns owing to ball pivot is mounted in
On axle, so the design length of rotating shaft can be shortened, thus reduce the design length of hydraulic pump, in order to protect
Card swash plate and cylinder body between liquid will not leak, the embodiment of the present invention in rotating shaft 60 outside cylinder body 30
Side is provided with mechanical sealing assembly 80.
Mechanical sealing assembly in the embodiment of the present invention can use structure commonly used in the prior art, specifically needs
The periphery of mechanical sealing assembly to be accomplished and rotating shaft 60 realizes sealing, and with end cap or swash plate need into
Row seals, it is ensured that liquid will not leak from penetrating hole of rotating shaft.
Mechanical sealing assembly, owing to not using ball pivot, can be arranged on rotating shaft near antibody by the embodiment of the present invention
Lateral surface on, reduce the taking of rotating shaft entire length, shorten the design length of hydraulic pump.
In the embodiment of the present invention, scheme without return plate and ball pivot goes for the hydraulic pressure of the following two kinds form
Pump:
First as in figure 2 it is shown, swash plate 50 and end cap 10 is fixing is connected and without relative motion, plunger piston slippery boots
Assembly 40 moves in a circle while doing piston movement in cylinder holes 31 on swash plate, namely passes through rotating shaft
60 drive cylinder body 30 to rotate, and swash plate 50 is then fixed on end cap 10 and does not rotates.
The second, cylinder body is fixed on shell, drives swash plate to rotate by rotating shaft, depend under the rotation of swash plate
Secondary plunger piston slippery boots assembly is pressed in cylinder holes.
In the embodiment of the present invention mechanical sealing assembly near one end of cylinder body except with rotating shaft lateral surface seal in addition to,
Also need to following at least one seal structure:
One, the other end of mechanical sealing assembly seals with end cap 10, is equivalent to end cap 10 and is provided with and machinery
The installation step that black box matches, is sealed with mechanical sealing assembly by installation step, with liquid-proof
Body leaks at end cap.
Two, as shown in Figure 2 and Figure 8, the mechanical sealing assembly other end seals with swash plate, in figure on swash plate 50
It is located at the installation step matched with mechanical sealing assembly, by the installation step on swash plate and mechanical seal group
Part seals, it is also possible to prevent liquid from leaking at end cap.
When using above-mentioned the second encapsulation scheme, in order to reduce the length of hydraulic pump further, the present invention is real
Execute example on end cap 10, be provided with the through hole 11 passed for rotating shaft 60, and the part that rotating shaft 0 is threaded through connects
Being connected to adapter, described through hole 11 is more than the maximum outside diameter of adapter, and is installed with at least part of described adapter,
Such that it is able to by the through hole 11 being received into end cap at least partially of adapter, thus reduce the whole of hydraulic pump
Body length so that hydraulic pump is compacter.
In the embodiment of the present invention, the mechanical sealing assembly mounting means near cylinder body one end can use such as lower section
Case: one, by mechanical sealing assembly 80 on the end face that one end of cylinder body is directly pressed on cylinder body 30, tool
Body is as shown in Figure 8；Two, in rotating shaft, outside cylinder body end face, it is provided with the shaft shoulder, mechanical sealing assembly is leaned on
One end of nearly cylinder body is pressed on the shaft shoulder, and in order to shorten design of hydraulic pump length, the embodiment of the present invention can
Setting is compressed with the end face by the shaft shoulder Yu cylinder body.
In order to reduce the thickness of shell, end cap 10 is revolved by screw thread by the embodiment of the present invention with housing 20
Button connects, and the bolt the most as shown in Figure 2 rather than in employing Fig. 1 connects, and does not so have bolt hole
In the case of, then need not housing design is blocked up, reduces the design thickness of housing, so that hydraulic pump
Compacter.
As shown in Figure 8, in the embodiment of the present invention, mechanical sealing assembly 80 includes that axial seal 81, first is pacified
Piece installing the 82, second installed part 83, axially sealing of axial seal 81 countershaft, the first installed part
82 and second installed part 83 be assemblied on axial seal successively, and the second installed part 83 and end cap or tiltedly
It is provided with O RunddichtringO 84 between dish, by O RunddichtringO 84, the through hole of end cap or swash plate is sealed.
The embodiment of the present invention is used primarily in various hydraulic pump, especially in the hydraulic pump of fully water lubricating.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art, in the technical scope that the invention discloses, can readily occur in
Change or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention
Should be as the criterion with scope of the claims.
Claims (8)
1. an axial plunger type hydraulic pump for hydraulic pressure backhaul, including two end caps and the housing group with through hole
The shell become, is provided with cylinder body, is provided with swash plate, described cylinder between cylinder body and one of them end cap in described through hole
It is laid with cylinder holes according to circumference array vertically on body, in cylinder holes, is respectively equipped with plunger piston slippery boots assembly；Its feature
Being, one end that each plunger piston slippery boots assembly is exposed to outside cylinder holes compresses with swash plate, and each plunger piston slippery boots
It is provided with hydraulic cavities between assembly and the inwall of corresponding cylinder holes, cylinder body is communicated with the intercommunicating pore of hydraulic cavities, institute
Stating hydraulic cavities volume when plunger piston slippery boots assembly moves in cylinder holes to reduce, described plunger piston slippery boots assembly is transported to swash plate
Time dynamic, hydraulic cavities volume increases；Described cylinder holes is stepped hole, and the bigger one end of stepped hole mesoporous towards
Swash plate, described plunger piston slippery boots assembly is provided with the step post mated with stepped hole；The axial side of described stepped hole
Sealing member it is provided with between face and plunger piston slippery boots assembly, and the stepped hole near swash plate one end and plunger piston slippery boots group
Sealing between part is higher than the one end away from swash plate；Liquid outside hydraulic cavities at sealing member in hydraulic cavities
Leakage supplements the liquid of hydraulic pressure intracavity.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1, it is characterised in that institute
Being filled with liquid in stating hydraulic cavities, in cylinder holes, the volume of hydraulic cavities is pressed by the plunger piston slippery boots assembly of motion
Contracting, presses to the liquid in this hydraulic cavities other hydraulic cavities, and drives the plunger piston slippery boots assembly of correspondence to swash plate
Motion.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1, it is characterised in that institute
State the stepped hole that stepped hole is at least two-stage.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1, it is characterised in that institute
The face area ratio of the face area and minimum cylinder of stating on step post maximum cylinder is: 1.15 to 1.75.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1, it is characterised in that institute
State sealing member and be provided with the flange that the step end face with stepped hole interlocks.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1 and 2, it is characterised in that
Described swash plate is fixing with end cap to be connected and without relative motion, and plunger piston slippery boots assembly does piston movement in cylinder holes
Move in a circle on swash plate simultaneously.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 1 and 2, it is characterised in that
It is sequentially provided with thrust button and valve plate, thrust button and valve plate between cylinder body and another end cap and is provided with liquid
Entrance, is provided with the communication gap being positioned at liquid inlet, described cylinder body lateral wall between thrust button and valve plate
And being communicated with passage between housing, the cavity between cylinder body with swash plate is by described communicating passage with between connecting
Gap connects with liquid inlet.
The axial plunger type hydraulic pump of hydraulic pressure backhaul the most according to claim 2, it is characterised in that institute
The liquid filled in stating hydraulic cavities and cylinder holes need the liquid phase of supercharging together.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410357509.1A CN104153986B (en) | 2014-07-21 | 2014-07-21 | The axial plunger type hydraulic pump of hydraulic pressure backhaul |
| PCT/CN2015/083823 WO2016011898A1 (en) | 2014-07-21 | 2015-07-10 | Axial plunger type hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410357509.1A CN104153986B (en) | 2014-07-21 | 2014-07-21 | The axial plunger type hydraulic pump of hydraulic pressure backhaul |
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| Publication Number | Publication Date |
|---|---|
| CN104153986A CN104153986A (en) | 2014-11-19 |
| CN104153986B true CN104153986B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410357509.1A Active CN104153986B (en) | 2014-07-21 | 2014-07-21 | The axial plunger type hydraulic pump of hydraulic pressure backhaul |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016011898A1 (en) * | 2014-07-21 | 2016-01-28 | 沃尔科技有限公司 | Axial plunger type hydraulic pump |
| CN104612956B (en) * | 2014-12-11 | 2016-04-13 | 无锡市华科力士水液压有限公司 | Variable quantity fully water lubricating axial piston water pump |
| CN105484684B (en) * | 2015-12-31 | 2018-06-01 | 中国石油天然气集团公司 | Plunger type landwaste lifting device and lifting method |
| CN105526051A (en) * | 2016-01-19 | 2016-04-27 | 沃尔科技有限公司 | High-pressure plunger pump with energy recycling function |
| CN109519352B (en) * | 2018-10-22 | 2020-08-28 | 徐州重型机械有限公司 | Plunger pump and engineering machinery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005201175A (en) * | 2004-01-16 | 2005-07-28 | Hitachi Constr Mach Co Ltd | Variable displacement swash plate type hydraulic rotating machine |
| CN1688812A (en) * | 2002-08-28 | 2005-10-26 | 托维克公司 | Long-piston hydraulic machines |
| CN103256217A (en) * | 2013-05-10 | 2013-08-21 | 浙江大学 | Axial plunger pump return-stroke mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006019884B4 (en) * | 2006-04-28 | 2008-04-17 | Sauer-Danfoss Gmbh & Co Ohg | Hydrostatic axial piston machine in bent axis design |
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2014
- 2014-07-21 CN CN201410357509.1A patent/CN104153986B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1688812A (en) * | 2002-08-28 | 2005-10-26 | 托维克公司 | Long-piston hydraulic machines |
| JP2005201175A (en) * | 2004-01-16 | 2005-07-28 | Hitachi Constr Mach Co Ltd | Variable displacement swash plate type hydraulic rotating machine |
| CN103256217A (en) * | 2013-05-10 | 2013-08-21 | 浙江大学 | Axial plunger pump return-stroke mechanism |
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| CN104153986A (en) | 2014-11-19 |
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