CN204082514U - Wear-resistant axial plunger type hydraulic pump - Google Patents

Wear-resistant axial plunger type hydraulic pump Download PDF

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Publication number
CN204082514U
CN204082514U CN201420413648.7U CN201420413648U CN204082514U CN 204082514 U CN204082514 U CN 204082514U CN 201420413648 U CN201420413648 U CN 201420413648U CN 204082514 U CN204082514 U CN 204082514U
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China
Prior art keywords
hydraulic pump
slippery boots
swash plate
plunger piston
piston slippery
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CN201420413648.7U
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Chinese (zh)
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蒋祖光
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Wal Science and Technology Ltd.
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ZHEJIANG WOER HYDRAULIC TECHNOLOGY Co Ltd
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Abstract

The utility model embodiment discloses a kind of wear-resistant axial plunger type hydraulic pump, relates to technical field of hydraulic pressure, solves plunger piston slippery boots assembly and to wear and tear excessive problem.A kind of wear-resistant axial plunger type hydraulic pump of the utility model, the shell that the housing comprising two end caps and have through hole forms, cylinder body is provided with in described through hole, swash plate is provided with between cylinder body and one of them end cap, described cylinder body is laid with cylinder holes according to circumference array vertically, in cylinder holes, is respectively equipped with plunger piston slippery boots assembly; Each plunger piston slippery boots assembly is exposed to one end outside cylinder holes and swash plate compresses, backhaul circle is provided with between swash plate and cylinder body, described backhaul circle comprises ring-type damper portion, described ring-type damper portion near the motion circumferential surface outside whole plunger piston slippery boots assembly, and and is provided with first fluid gap between the outer side surface of plunger piston slippery boots assembly.The utility model embodiment is mainly used in various oil hydraulic pump, in the oil hydraulic pump of especially fully water lubricating.

Description

Wear-resistant axial plunger type hydraulic pump
Technical field
The utility model relates to technical field of hydraulic pressure, particularly relates to wear-resistant axial plunger type hydraulic pump.
Background technique
Pluger type hydraulic pump is that technical field of hydraulic pressure uses more high-pressure service pump, negative pressure is produced to suck the liquid needing supercharging in order to allow in the cylinder holes of oil hydraulic pump, usually need the plunger in cylinder holes to be connected on an end face of return plate, and another end face of return plate needs mortgage on swash plate, and wherein return plate is arranged on ball pivot.
When by the motion of driven by motor oil hydraulic pump, return plate drives plunger to do piston movement in cylinder holes, realize the supercharging of liquid, the mode of this return plate is adopted to realize the piston movement of plunger, return plate can produce larger radial forces to plunger, cause plunger comparatively large with the friction of cylinder holes in piston movement process, thus make the wearing and tearing of plunger more.
Model utility content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provides wear-resistant axial plunger type hydraulic pump, reduces the wearing and tearing of plunger preferably.
For achieving the above object, the utility model adopts following technological scheme:
A kind of wear-resistant axial plunger type hydraulic pump, the shell that the housing comprising two end caps and have through hole forms, cylinder body is provided with in described through hole, swash plate is provided with between cylinder body and one of them end cap, described cylinder body is laid with cylinder holes according to circumference array vertically, in cylinder holes, is respectively equipped with plunger piston slippery boots assembly; Each plunger piston slippery boots assembly is exposed to one end outside cylinder holes and swash plate compresses, backhaul circle is provided with between swash plate and cylinder body, described backhaul circle comprises ring-type damper portion, described ring-type damper portion near the motion circumferential surface outside whole plunger piston slippery boots assembly, and and is provided with first fluid gap between the outer side surface of plunger piston slippery boots assembly.
Preferably, described plunger piston slippery boots assembly comprises the slide part compressed with swash plate, and described fluid gap comprises the first fluid gap formed between the motion circumferential surface outside ring-type damper portion and whole slide part.
Preferably, described backhaul circle also comprises startup supporting portion, and start between supporting portion and swash plate and form guiding groove, on described plunger piston slippery boots assembly, correspondence is provided with upper saw pulley, and upper saw pulley moves in guiding groove.
Preferably, the width of described guiding groove is greater than the thickness of upper saw pulley.
Preferably, described plunger piston slippery boots assembly is provided with the neck be connected with upper saw pulley, and described startup supporting portion is near the motion circumferential surface outside neck, and described fluid gap comprises the second fluid gap formed between the motion circumferential surface outside startup supporting portion and neck.
Preferably, be filled with liquid in the cavity of described oil hydraulic pump in the course of the work between swash plate and cylinder body, described liquid enters first fluid gap and second fluid gap and produces centripetal force to the plunger piston slippery boots assembly of motion.
Preferably, described second fluid gap is less than first fluid gap.
Preferably, described backhaul circle also comprises the first assembly department that the end face from ring-type damper portion towards swash plate extends to form, and described first assembly department is fixed between swash plate and shell; And/or
Described backhaul circle also comprises the second assembly department that the end face from ring-type damper portion towards cylinder body extends to form, and the second assembly department is fixed between swash plate and cylinder body.
Preferably, hydraulic pressure cavity is provided with between each plunger piston slippery boots assembly with the inwall of corresponding cylinder holes, cylinder body is provided with the intercommunicating pore being communicated with hydraulic pressure cavity, and when described plunger piston slippery boots assembly moves in cylinder holes, hydraulic pressure cavity volume reduces, and when described plunger piston slippery boots assembly moves to swash plate, hydraulic pressure cavity volume increases.
Preferably, described backhaul circle adopts PEEK or PA6 or POM material to make.
The wear-resistant axial plunger type hydraulic pump of the confession that the utility model provides, owing to not being connected by return plate between plunger piston slippery boots assembly with swash plate, and be only enclose outside to put backhaul circle, damping function is played by the liquid in the gap between backhaul circle and plunger piston slippery boots assembly, reduce centrifugal force to reduce wear, and the fluid resistance that this liquid produces also can reduce friction for plunger piston slippery boots assembly itself, thus reduce wear.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of oil hydraulic pump in prior art;
Fig. 2 is the structural representation of oil hydraulic pump in the utility model embodiment;
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 utility model embodiment, cylinder body adopts two-stage step hole;
Fig. 7 is the assembling schematic diagram of backhaul circle and swash plate in the utility model embodiment;
Fig. 8 is D part partial enlarged drawing in Fig. 2;
Fig. 9 is E part partial enlarged drawing in Fig. 2.
Reference character: 10-end cap, 11-through hole, 20-housing, 30-cylinder body, 31-cylinder holes, 32-hydraulic pressure cavity, 33-intercommunicating pore, 34-Sealing, 35-flange, 36-communicating passage, 40-plunger piston slippery boots assembly, 41-plunger, 42-piston shoes, 43-upper saw pulley, 44-neck, 50-swash plate, 60-rotating shaft, 70-thrust button, 71-liquid inlet, 72-communication gap, 75-thrust plate, 80-mechanical sealing assembly, 81-axial seal, 82-first assembling set, 83-second assembling set, 84-0 RunddichtringO, 90-backhaul circle, 91-ring-type damper portion, 92-first fluid gap, 93-starts supporting portion, 94-guiding groove, 95-second fluid gap, 96-first assembly department, 97-second assembly department,
100-cylinder body, 200-plunger piston slippery boots assembly, 300-return plate, 400-swash plate, 500-rotating shaft, 600-ball pivot.
Embodiment
Axial plunger type hydraulic pump of the prior art as shown in Figure 1, this oil hydraulic pump comprises cylinder body 100, plunger piston slippery boots assembly 200 and return plate 300, and plunger piston slippery boots assembly 200 and return plate 300 assemble, return plate 300 and swash plate 400 compress, by the rotation of cylinder body 100, plunger piston slippery boots assembly 200 and return plate 300 entirety are moved relative to swash plate 400, is equivalent to drive plunger piston slippery boots assembly 200 to do piston movement in cylinder holes by the rotation of return plate 300.Meanwhile, because return plate does oblique circular movement, so be provided with ball pivot 600 in rotating shaft 500, return plate 300 is hinged on ball pivot 600.
The oil hydraulic pump of ball pivot and return plate structure is more than adopted to there is following defect:
One, return plate and ball pivot take the larger space of oil hydraulic pump inside, cause oil hydraulic pump entirety to manufacture volume larger.
Two, return plate moves in a circle together along with plunger piston slippery boots assembly, cause the centrifugal force that acts on plunger piston slippery boots assembly larger, thus make between plunger piston slippery boots assembly and cylinder holes, to there is larger opposing force, cause plunger piston slippery boots assembly and cylinder holes friction place to be easily worn, and the position of easily wearing and tearing is towards one end of swash plate.In addition, return plate directly produces active force to plunger piston slippery boots assembly, and plunger piston slippery boots assembly and cylinder holes friction place also can be made easily to be worn.
Three, return plate belongs to plunger piston slippery boots assembly and directly contacts connection, causes and there is comparatively noticeable effort between the two, easily cause plunger piston slippery boots assembly and return plate contacting point to produce increased wear.
Four, adopt the scheme of return plate and ball pivot, also need to provide respective action power by spring, cause the component of oil hydraulic pump mounted inside more, not only cost is higher, also makes assembling comparatively complicated.
In order to overcome the defect of oil hydraulic pump in prior art, the utility model embodiment provides a kind of axial plunger type hydraulic pump, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of wear-resistant axial plunger type hydraulic pump, as shown in Figure 2, this axial plunger type hydraulic pump comprises two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this oil hydraulic pump, and be provided with through hole in housing 20, the cylinder body 30 between two end caps is provided with in this through hole, described cylinder body 30 is laid with cylinder holes 31 according to circumference array vertically, described cylinder holes is 2 to 24, plunger piston slippery boots assembly 40 is respectively equipped with in cylinder holes, piston movement is carried out in turn by the plunger piston slippery boots assembly 40 in each cylinder holes 31, realize the supercharging to liquid, also the motor of liquid carrying for power can be realized, in order to overcome the defect of prior art, in the utility model embodiment, each plunger piston slippery boots assembly is exposed to one end outside cylinder holes and swash plate compresses, save return plate and ball pivot in prior art.On this model utility concept, the utility model embodiment also provides following embodiment.
Embodiment one
The utility model embodiment provides a kind of axial plunger type hydraulic pump adopting hydraulic pressure backhaul mode, as shown in Figure 2, this axial plunger type hydraulic pump comprises two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this oil hydraulic pump, and be provided with through hole in housing 20, the cylinder body 30 between two end caps is provided with in this through hole, described cylinder body 30 is laid with cylinder holes 31 according to circumference array vertically, plunger piston slippery boots assembly 40 is respectively equipped with in cylinder holes, piston movement is carried out in turn by the plunger piston slippery boots assembly 40 in each cylinder holes 31, realize the supercharging to liquid, also the motor of liquid carrying for power can be realized.Realize plunger piston slippery boots assembly 40 in the utility model embodiment and carry out the scheme of piston movement in turn as shown in Figure 2, swash plate 50 is set between cylinder body 30 and one of them end cap, each plunger piston slippery boots assembly 40 is exposed to one end outside cylinder holes and swash plate compresses, no longer adopt the scheme driven by return plate in prior art, but plunger piston slippery boots assembly 40 is directly pressed on swash plate 50, make in course of normal operation, plunger piston slippery boots assembly can rotate on swash plate.
Plunger piston slippery boots assembly 40 in the utility model comprises plunger 41 and piston shoes 42, and wherein plunger 41 is arranged in cylinder holes 31, and piston shoes 42 are pressed on swash plate 50, and is connected by ball pivot between plunger 41 with piston shoes 42.
Do piston movement to give plunger piston slippery boots assembly 40 and power is provided, as shown in Figure 2, Figure 3, Figure 4, hydraulic pressure cavity 32 is provided with between each plunger piston slippery boots assembly 40 with the inwall of corresponding cylinder holes 31 in the utility model embodiment, and cylinder body 30 is provided with the intercommunicating pore 33 (shown in Figure 5) being communicated with hydraulic pressure cavity 32, liquid is filled with in hydraulic pressure cavity 32, and the set-up mode of hydraulic pressure cavity in the present embodiment, when plunger piston slippery boots assembly can be made to move in cylinder holes, hydraulic pressure cavity volume reduces, and when plunger piston slippery boots assembly moves to swash plate, hydraulic pressure cavity volume increases.As shown in Figure 3, when plunger piston slippery boots assembly 40 presses in cylinder holes by swash plate 50, the volume of hydraulic pressure cavity is compressed, because the volume of corresponding hydraulic pressure cavity 32 reduces, so the liquid in corresponding hydraulic pressure cavity flow to other hydraulic pressure cavity by intercommunicating pore 33, fluid pressure in other hydraulic pressure cavity is increased, as shown in Figure 4, other hydraulic pressure cavity realize the increase of hydraulic pressure cavity 32 volume when fluid pressure increases, thus drive corresponding plunger piston slippery boots assembly 40 can move as swash plate 50 direction.Above movement mechanism acts on each plunger piston slippery boots assembly in turn, thus makes plunger piston slippery boots assembly do piston movement.
Preferably, during pressure increase in hydraulic pressure cavity, in order to move in drive plunger slippery boots assembly item swash plate direction, as shown in Figure 4, in the utility model embodiment, cylinder holes 31 is designed to step hole, the larger one end of this step hole mesoporous is towards swash plate 50, and on plunger piston slippery boots assembly 40, be provided with the step post mated with step hole, it is specifically the step post matched by plunger design, thus make to form hydraulic pressure cavity 32 between the step on the step on step hole and step post, the other end of cylinder body is provided with space, when pressure increase, this pressure can act predominantly on the step surface of step post naturally, and promote plunger piston slippery boots assembly 40 and move to swash plate 50 direction.Except adopting the mode of step hole, those skilled in the art can also adopt other modes to realize the setting of hydraulic pressure cavity, annular aperture as corresponding in bamboo product in cylinder holes, and plunger design corresponding ring-type bar, and ring-type bar coordinates with annular aperture and forms hydraulic pressure cavity.On the utility model embodiment step post, less one end is positioned at step place and is provided with circular groove, thus reduces its wearing and tearing.
Preferably, due in hydraulic pressure cavity 32 pressure promote plunger 41 move time, relevant to Driving force size except the pressure in hydraulic pressure cavity, the step size that what another played a crucial role is on step post, in order to ensure that Driving force can promote plunger piston slippery boots assembly and move to swash plate direction, can also ensure that plunger piston slippery boots assembly is to the pressurized effect needing pressurized liquid simultaneously, need to ensure that on step post, front end promotes the minimum face area of supercharging simultaneously, and step post appear on the stage terrace size design, the utility model designer is by repeatedly designing, repeatedly recruitment evaluation, when finally thinking that the face area of maximum cylinder is designed to 1.15 to 1.75 with the face area ratio of minimum cylinder on step post, corresponding effect is best, also can by the Volume design optimization of plunger piston slippery boots.Generally, when on step post, the diameter of maximum cylinder is larger, above-mentioned area ratio can select less design parameter, and as when the diameter of maximum cylinder is greater than 24mm, above-mentioned area ratio now 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 larger design parameter, as when the diameter of maximum cylinder is less than 24mm, above-mentioned area ratio now can select 1.4 to 1.75; Adopt the selection mode of above-mentioned area ratio to ensure Driving force, can pressurized effect be ensured again, can also ensure that plunger piston slippery boots assembly is unlikely to too heavy.
Preferably, step hole in the utility model embodiment selects one-level step hole just can realize its technical purpose, in order to ensure Driving force, step hole can also be designed to the step hole of at least two-stage by the utility model embodiment, is exactly the two-stage step post of two-stage step hole and correspondence as what adopt in Fig. 6.
Preferably, as Fig. 2, Fig. 3, shown in Fig. 4, the utility model embodiment is also provided with Sealing 34 between the axial sides of described step hole and plunger piston slippery boots assembly 40, liquid in hydraulic pressure cavity 32 will be made not easily to reveal by Sealing 34, certainly under the oil hydraulic pump provided due to the utility model is mainly used in hyperbaric environment, hydraulic pressure cavity and the extraneous circulation that more or less there will be some liquid, in order to ensure that plunger piston slippery boots assembly can be pressed to swash plate by hydraulic pressure cavity 32, sealability in the utility model embodiment adopts following scheme: near the sealing between the step hole and plunger piston slippery boots assembly of swash plate 50 one end higher than the one end away from swash plate, make not easily to reveal near swash plate 50 one end, and away from swash plate one end, in general pressure is larger, so the internal pressure leakage of hydraulic pressure cavity will be less, even if cause leakage because pressure is excessive, also there will be liquid outside hydraulic pressure cavity to hydraulic pressure cavity internal leakage, thus supplementary function is played to the liquid in hydraulic pressure cavity, thus the pressure in hydraulic pressure cavity can be acted on plunger piston slippery boots assembly 40 better.Certainly, due to hydraulic pressure cavity and the extraneous circulation that more or less there will be some liquid, in order to ensure can not to occur polluting to needing the liquid of supercharging, the liquid of filling in the utility model embodiment hydraulic pressure cavity needs the liquid of supercharging identical with cylinder holes; The oil hydraulic pump provided by the utility model as us applies to field of seawater desalination, then can fill seawater in hydraulic pressure cavity and also can fill fresh water, fills seawater or fresh water all can not pollute needing the seawater of supercharging.
Preferably, because plunger is doing piston movement always, come off to prevent Sealing, as shown in Figure 3, the utility model embodiment is provided with the flange 35 interlocked with the step end face of step hole on Sealing 34, is buckled on step surface by flange 35, and Sealing is not easily deviate from from cylinder holes.
Preferably, the oil hydraulic pump that the utility model provides can adopt but be not limited to following scheme:
The first, as shown in Figure 2, swash plate 50 is fixedly connected with end cap 10 and without relative movement, move in a circle on swash plate while plunger piston slippery boots assembly does piston movement in cylinder holes, namely drive cylinder body 30 to rotate by rotating shaft 60, swash plate 50 is then fixed on end cap and does not rotate.
The second, cylinder body is fixed on shell, drives swash plate to rotate by rotating shaft, successively plunger piston slippery boots assembly is pressed in cylinder holes under the rotation of swash plate.
Preferably, because the liquid in hydraulic pressure cavity can leak out, in order to ensure that liquid can overall circulation, as shown in Figure 9, thrust button 70 and thrust plate 75 is provided with between cylinder body 30 and another end cap 10 successively in the utility model embodiment, thrust button 70 and thrust plate 75 are provided with liquid inlet 71, the communication gap 72 being positioned at liquid inlet 71 place is provided with between thrust button 70 and thrust plate 75, and be provided with communicating passage 36 between cylinder body 30 outer side wall and housing 20, cavity between cylinder body with swash plate is communicated with liquid inlet 17 with communication gap 72 by described communicating passage 36, thus make the liquid leaked out can get back to liquid inlet place by above-mentioned connection position, liquid all can be discharged when not using oil hydraulic pump.
Preferably, communicating passage 36 is set between above-mentioned cylinder body outer side wall and housing and can be distributed in discontinuously between cylinder body 30 outer side wall and housing 20, e.g., cylinder body 30 outer side wall arranges some communication groove discontinuously.
Embodiment two
The utility model embodiment provides a kind of wear-resistant axial plunger type hydraulic pump, this oil hydraulic pump saves return plate, and the wearing and tearing of plunger piston slippery boots assembly are reduced by corresponding scheme, specifically as shown in Figure 2, this axial plunger type hydraulic pump comprises two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this oil hydraulic pump, and be provided with through hole in housing 20, the cylinder body 30 between two end caps 10 is provided with in this through hole, described cylinder body 30 is laid with cylinder holes 31 according to circumference array vertically, plunger piston slippery boots assembly 40 is respectively equipped with in cylinder holes 31, piston movement is carried out in turn by the plunger piston slippery boots assembly in each cylinder holes, realize the supercharging to liquid, also the motor of liquid carrying for power can be realized.Realize plunger piston slippery boots assembly in the utility model embodiment and carry out the scheme of piston movement in turn as shown in Figure 2, swash plate 50 is set between cylinder body 30 and one of them end cap 10, each plunger piston slippery boots assembly 40 is exposed to one end outside cylinder holes and swash plate 50 compresses, no longer adopt the scheme driven by return plate in prior art, but plunger piston slippery boots assembly is directly pressed on swash plate, make in course of normal operation, plunger piston slippery boots assembly can rotate on swash plate.
In order to reduce the wearing and tearing of plunger piston slippery boots assembly, as shown in Figure 2, the utility model embodiment is provided with backhaul circle 90 between swash plate and cylinder body, in oil hydraulic pump course of normal operation, this backhaul circle 90 does not directly contact with plunger piston slippery boots assembly 40, only that plunger piston slippery boots assembly 40 is shielded, as shown in Figure 2 and Figure 7, described backhaul circle 90 comprises ring-type damper portion 91, described ring-type damper portion 91 is near the motion circumferential surface outside whole plunger piston slippery boots assembly, and and be provided with fluid gap between the outer side surface of plunger piston slippery boots assembly, specifically, because plunger piston slippery boots assembly moves in a circle along swash plate, ring-type damper portion 91 is had in the circumferential surface arranged outside of this circular movement, and be provided with first fluid gap 92 between ring-type damper portion 91 and each plunger piston slippery boots assembly, owing to being filled with fluid in first fluid gap 92 in hydraulic pump works process, in the process of plunger piston slippery boots assembly 40 High Rotation Speed, fluid in first fluid gap 92 produces centripetal force to plunger piston slippery boots assembly, the centrifugal force of most plunger piston slippery boots assembly 40 can be offset, thus the wearing and tearing that reduction plunger piston slippery boots assembly brings because of centrifugal force.Further, because ring-type damper portion 91 does not directly contact with between plunger piston slippery boots assembly, but produce respective action power by fluid, the active force of plunger piston slippery boots assembly can be reduced like this, reduce its wearing and tearing.
The utility model embodiment does not need filling liquid in fluid gap specially, oil hydraulic pump in the course of the work, liquid can flow in the cavity between swash plate and cylinder body, concrete circulation path can explanation in reference example one, repeat no more herein, liquid in the cavities enters fluid gap and produces centripetal force to the plunger piston slippery boots assembly of motion, thus plays the above-mentioned effect reduced wear.
The scheme that the driving mode that in the utility model embodiment, plunger piston slippery boots assembly realizes piston movement can adopt embodiment a kind of, no longer describe in detail, certain those skilled in the art also can expect other drive schemes herein.
As shown in Figure 2 and Figure 7, plunger piston slippery boots assembly comprises the slide part compressed with swash plate, general plunger piston slippery boots assembly 40 comprises plunger 41 and piston shoes 42, and slide part is arranged on piston shoes 42, the slide part institute that ring-type damper portion 92 in the utility model embodiment is arranged forms the outside of motion circumferential surface, makes to form first fluid gap 92 between the motion circumferential surface outside ring-type damper portion and whole slide part.
Piston movement is done owing to adopting the mode drive plunger slippery boots assembly of hydraulic pressure cavity, in the long-time idle situation of oil hydraulic pump, liquid in hydraulic pressure cavity may leak, cause to do piston movement by drive plunger slippery boots assembly, in order to plunger piston slippery boots assembly be driven to do piston movement when oil hydraulic pump just starts, as shown in Figure 2 and Figure 7, backhaul circle 90 in the utility model embodiment also comprises startup supporting portion 93, start between supporting portion 93 and swash plate 50 and form guiding groove 94, on described plunger piston slippery boots assembly 40, correspondence is provided with upper saw pulley 43, upper saw pulley is generally arranged on piston shoes 42, and upper saw pulley 43 moves in guiding groove 94, at the beginning of startup, upper saw pulley 43 is conflicted on startup supporting portion 93, thus drive plunger slippery boots assembly 40 moves along swash plate 50, form the piston movement of plunger 41 in cylinder holes 31, after startup a period of time, full liquid can be filled in hydraulic pressure cavity 32, thus no longer need to conflict in startup supporting portion.So; the width design of guiding groove 94, when designing, is become to be greater than the thickness of upper saw pulley 43 by the utility model embodiment, under making to fill full liquid case in hydraulic pressure cavity; start supporting portion 93 not need to support upper saw pulley 43, thus play the effect of protection backhaul circle 90.
Be not worn to protect plunger piston slippery boots assembly better; second fluid gap is also provided with in the utility model embodiment; concrete set-up mode is as shown in Fig. 2, Fig. 3, Fig. 7; plunger piston slippery boots assembly is provided with the neck 44 be connected with upper saw pulley 43; described startup supporting portion 93 is near the motion circumferential surface outside neck; start between the motion circumferential surface outside supporting portion 93 and neck 44 and form second fluid gap 95, be equivalent to start the effect that supporting portion serves a part of ring-type damper portion herein.Thus, the fluid in first fluid gap 92 is then produce centripetal force to the outside of upper saw pulley, and the fluid in second fluid gap 95 is then produce centripetal force to outside neck, is reduced the wearing and tearing of plunger piston slippery boots assembly by above-mentioned two position centripetal force.
In order to protect upper saw pulley, second fluid gap 95 is designed to be less than first fluid gap 92 by the utility model embodiment, makes fluid to act preferentially on neck, reduces the wearing and tearing of upper saw pulley.In general, the size in first fluid gap and second fluid gap all needs to be less than 1mm.
Conveniently install, the backhaul circle of the utility model embodiment is provided with assembly department, is arranged between cylinder body and swash plate by assembly department by backhaul circle, concrete but be not limited to following scheme:
The first, as shown in Figure 2 and Figure 7, the first assembly department 96 that backhaul circle 90 end face also comprised from ring-type damper portion 91 towards swash plate extends to form, described first assembly department 96 is fixed between swash plate 50 and shell 20.
The second, as shown in Figure 2 and Figure 7, the second assembly department 97, second assembly department 97 that backhaul circle 90 end face also comprised from ring-type damper portion 91 towards cylinder body extends to form is fixed between swash plate 50 and cylinder body 30.
Above first assembly department 96 and the second assembly department 97 can be arranged simultaneously, have above-mentioned ring-type damper portion, start supporting portion, the first assembly department, the second assembly department backhaul coil structures as shown in Figure 7.Because ring-type damper portion all needs to produce corresponding friction to startup supporting portion, the backhaul circle that the utility model embodiment provides can adopt but be not limited to PEEK (polyether-ether-ketone) material or PA6 (nylon 6) material or POM (polyoxymethylene) material and make, improve its rub proofness, extend backhaul circle working life.
Embodiment three
Oil hydraulic pump of the prior art, because return plate and ball pivot take the larger space of oil hydraulic pump inside, oil hydraulic pump entirety is caused to manufacture volume larger, the utility model embodiment provides a kind of compact type axial plunger type hydraulic pump, specifically as shown in Figure 2, this axial plunger type hydraulic pump comprises two end caps 10 and housing 20, end cap 10 and housing 20 form the shell of this oil hydraulic pump, and be provided with through hole in housing, the cylinder body 30 between two end caps is provided with in this through hole, described cylinder body 30 is laid with cylinder holes 31 according to circumference array vertically, plunger piston slippery boots assembly 40 is respectively equipped with in cylinder holes 31, piston movement is carried out in turn by the plunger piston slippery boots assembly 40 in each cylinder holes, realize the supercharging to liquid, also the motor of liquid carrying for power can be realized.
The scheme that the backhaul scheme of the plunger piston slippery boots assembly in the utility model embodiment can adopt embodiment one and embodiment two to provide, namely adopts hydraulic pressure cavity to carry out hydraulic pressure backhaul, and adopts backhaul circle to reduce wear, specifically repeat no more.
In order to reduce the design length of oil hydraulic pump, in the utility model embodiment each plunger piston slippery boots assembly be exposed to one end outside cylinder holes directly and swash plate 50 compress, return plate and ball pivot can be saved, because ball pivot is mounted in rotating shaft, so the design length of rotating shaft can be shortened, thus reduce the design length of oil hydraulic pump, in order to ensure that the liquid between swash plate and cylinder body can not leak, the utility model embodiment is provided with mechanical sealing assembly 80 in rotating shaft 60 on the outer side surface of cylinder body 30.
Mechanical sealing assembly in the utility model embodiment can adopt structure conventional in prior art, the circumferential surface accomplishing mechanical sealing assembly and rotating shaft 60 is specifically needed to realize sealing, and need to seal with end cap or swash plate, ensure that liquid can not leak from penetrating hole of rotating shaft.
Mechanical sealing assembly, owing to not adopting ball pivot, can be arranged on rotating shaft on the outer side surface of antibody by the utility model embodiment, reduces taking of rotating shaft entire length, shortens the design length of oil hydraulic pump.
Go for the oil hydraulic pump of the following two kinds form without the scheme of return plate and ball pivot in the utility model embodiment:
The first, as shown in Figure 2, swash plate 50 is fixedly connected with end cap 10 and without relative movement, plunger piston slippery boots assembly 40 moves in a circle do piston movement in cylinder holes 31 while on swash plate, namely drives cylinder body 30 to rotate by rotating shaft 60, and swash plate 50 is then fixed on end cap 10 and does not rotate.
The second, cylinder body is fixed on shell, drives swash plate to rotate by rotating shaft, successively plunger piston slippery boots assembly is pressed in cylinder holes under the rotation of swash plate.
In the utility model embodiment, mechanical sealing assembly is near one end of cylinder body except sealing with rotating shaft outer side surface, also needs following at least one sealing configuration:
One, the other end of mechanical sealing assembly and end cap 10 seal, and are equivalent to end cap 10 and are provided with the installation step matched with mechanical sealing assembly, sealed, leak with liquidproof from end caps by installation step and mechanical sealing assembly.
Two, as shown in Figure 2 and Figure 8, the mechanical sealing assembly the other end and swash plate seal, in figure, swash plate 50 is located at the installation step matched with mechanical sealing assembly, is sealed by the installation step on swash plate and mechanical sealing assembly, also can prevent liquid from leaking from end caps.
When adopting above-mentioned the second encapsulation scheme, in order to reduce the length of oil hydraulic pump further, the utility model embodiment is provided with the through hole 11 passed for rotating shaft 60 on end cap 10, and rotating shaft 0 is connected with connector through the part passed through, described through hole 11 is greater than the maximum outside diameter of connector, and is installed with at least part of described connector, thus can by the through hole 11 being received into end cap at least partially of connector, thus reduce the entire length of oil hydraulic pump, make oil hydraulic pump compacter.
In the utility model embodiment, the mounting type of mechanical sealing assembly near cylinder body one end can adopt following scheme: one, be directly pressed near one end of cylinder body on the end face of cylinder body 30 by mechanical sealing assembly 80, specifically as shown in Figure 8; Two, in rotating shaft, outside cylinder body end face, being provided with the shaft shoulder, mechanical sealing assembly one end near cylinder body is pressed on the shaft shoulder, and in order to shorten design of hydraulic pump length, the end face of the shaft shoulder and cylinder body can being compressed setting by the utility model embodiment.
In order to the thickness of shell can be reduced, end cap 10 is connected by screw thread spinner with housing 20 by the utility model embodiment, specifically as shown in Figure 2, instead of the bolt in employing Fig. 1 connects, when there is no bolt hole like this, what then do not need housing design is blocked up, reduces the design thickness of housing, thus makes oil hydraulic pump compacter.
As shown in Figure 8, in the utility model embodiment, mechanical sealing assembly 80 comprises axial seal 81, first assembling set 82, second assembling set 83, the axis of axial seal 81 countershaft seals, first assembling set 82 and the second assembling set 83 are assemblied on axial seal successively, and be provided with 0 RunddichtringO 84 between the second assembling set 83 and end cap or swash plate, sealed by the through hole of 0 RunddichtringO, 84 pairs of end caps or swash plate.
The utility model embodiment is mainly used in various oil hydraulic pump, in the oil hydraulic pump of especially fully water lubricating.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims (10)

1. a wear-resistant axial plunger type hydraulic pump, the shell that the housing comprising two end caps and have through hole forms, cylinder body is provided with in described through hole, swash plate is provided with between cylinder body and one of them end cap, described cylinder body is laid with cylinder holes according to circumference array vertically, described cylinder holes is 2 to 24, is respectively equipped with plunger piston slippery boots assembly in cylinder holes; It is characterized in that, each plunger piston slippery boots assembly is exposed to one end outside cylinder holes and swash plate compresses, backhaul circle is provided with between swash plate and cylinder body, described backhaul circle comprises ring-type damper portion, described ring-type damper portion near the motion circumferential surface outside whole plunger piston slippery boots assembly, and and is provided with first fluid gap between the outer side surface of plunger piston slippery boots assembly.
2. wear-resistant axial plunger type hydraulic pump according to claim 1, it is characterized in that, described plunger piston slippery boots assembly comprises the slide part compressed with swash plate, and described fluid gap comprises the first fluid gap formed between the motion circumferential surface outside ring-type damper portion and whole slide part.
3. wear-resistant axial plunger type hydraulic pump according to claim 1 and 2, it is characterized in that, described backhaul circle also comprises startup supporting portion, starts between supporting portion and swash plate and forms guiding groove, on described plunger piston slippery boots assembly, correspondence is provided with upper saw pulley, and upper saw pulley moves in guiding groove.
4. wear-resistant axial plunger type hydraulic pump according to claim 3, is characterized in that, the width of described guiding groove is greater than the thickness of upper saw pulley.
5. wear-resistant axial plunger type hydraulic pump according to claim 3, it is characterized in that, described plunger piston slippery boots assembly is provided with the neck be connected with upper saw pulley, described startup supporting portion is near the motion circumferential surface outside neck, and described fluid gap comprises the second fluid gap formed between the motion circumferential surface outside startup supporting portion and neck.
6. wear-resistant axial plunger type hydraulic pump according to claim 5, it is characterized in that, be filled with liquid in the cavity of described oil hydraulic pump in the course of the work between swash plate and cylinder body, described liquid enters first fluid gap and second fluid gap and produces centripetal force to the plunger piston slippery boots assembly of motion.
7. wear-resistant axial plunger type hydraulic pump according to claim 6, is characterized in that, described second fluid gap is less than first fluid gap.
8. wear-resistant axial plunger type hydraulic pump according to claim 1 and 2, is characterized in that:
Described backhaul circle also comprises the first assembly department that the end face from ring-type damper portion towards swash plate extends to form, and described first assembly department is fixed between swash plate and shell; And/or
Described backhaul circle also comprises the second assembly department that the end face from ring-type damper portion towards cylinder body extends to form, and the second assembly department is fixed between swash plate and cylinder body.
9. wear-resistant axial plunger type hydraulic pump according to claim 1 and 2, it is characterized in that, hydraulic pressure cavity is provided with between each plunger piston slippery boots assembly with the inwall of corresponding cylinder holes, cylinder body is provided with the intercommunicating pore being communicated with hydraulic pressure cavity, when described plunger piston slippery boots assembly moves in cylinder holes, hydraulic pressure cavity volume reduces, and when described plunger piston slippery boots assembly moves to swash plate, hydraulic pressure cavity volume increases.
10. wear-resistant axial plunger type hydraulic pump according to claim 1 and 2, is characterized in that, described backhaul circle adopts PEEK or PA6 or POM material to make.
CN201420413648.7U 2014-07-21 2014-07-21 Wear-resistant axial plunger type hydraulic pump Active CN204082514U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100482A (en) * 2014-07-21 2014-10-15 浙江沃尔液压科技有限公司 Wear-resistant axial plunger type hydraulic pump
WO2016011898A1 (en) * 2014-07-21 2016-01-28 沃尔科技有限公司 Axial plunger type hydraulic pump
WO2017015782A1 (en) * 2015-07-24 2017-02-02 杭州绿聚科技有限公司 Novel axial piston pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100482A (en) * 2014-07-21 2014-10-15 浙江沃尔液压科技有限公司 Wear-resistant axial plunger type hydraulic pump
WO2016011898A1 (en) * 2014-07-21 2016-01-28 沃尔科技有限公司 Axial plunger type hydraulic pump
WO2017015782A1 (en) * 2015-07-24 2017-02-02 杭州绿聚科技有限公司 Novel axial piston pump

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Patentee after: Wal Science and Technology Ltd.

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Patentee before: Zhejiang Woer Hydraulic Technology Co., Ltd.