CN204357643U - A kind of swash plate rotary internal Flat valve axial piston pump - Google Patents

A kind of swash plate rotary internal Flat valve axial piston pump Download PDF

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Publication number
CN204357643U
CN204357643U CN201420777025.8U CN201420777025U CN204357643U CN 204357643 U CN204357643 U CN 204357643U CN 201420777025 U CN201420777025 U CN 201420777025U CN 204357643 U CN204357643 U CN 204357643U
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CN
China
Prior art keywords
valve
pump
swash plate
plunger
cover
Prior art date
Application number
CN201420777025.8U
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Chinese (zh)
Inventor
徐兵
李莹
岳艺明
张军辉
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浙江大学
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Application filed by 浙江大学 filed Critical 浙江大学
Priority to CN201420777025.8U priority Critical patent/CN204357643U/en
Application granted granted Critical
Publication of CN204357643U publication Critical patent/CN204357643U/en

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Abstract

The utility model discloses a kind of swash plate rotary internal Flat valve axial piston pump, the delivery valve group that it comprises front cover, the front pump housing, the pump shaft be arranged in the front pump housing, the bearing unit be arranged on pump shaft, black box, the rear pump housing, the swash plate be arranged in the rear pump housing, plunger piston slippery boots assembly, retracting spring, cylinder body, the suction valve group be arranged in cylinder body, rear end cover and is arranged in rear end cover; Wherein pump shaft drives swash plate to rotate by spline, and by thrust-bearing and deep groove ball bearing, the axial force of common carrying swash plate and radial force, cylinder body is fixed on geo-stationary on the rear pump housing, at cylinder body afterbody and rear pump cover, suction valve group and delivery valve group is housed respectively.The utility model structure is simple, easy to maintenance, and effectively decreases the leakage of plunger pump, improves working pressure, volumetric efficiency, has higher specific power and cost performance, and resistance tocrocking is good, is particularly useful for high-pressure water pump.

Description

A kind of swash plate rotary internal Flat valve axial piston pump

Technical field

The utility model relates to oil hydraulic pump field, particularly relates to a kind of swash plate rotary internal Flat valve axial piston pump.

Background technique

Along with the development of the high speed of oil hydraulic pump, high pressure, energy saving direction, make the research of axial piston pump more and more extensive.Axial piston pump has the advantages such as compact structure, specific power volume are little, lightweight, other prexxure of the hydraulic pumps are high relatively, the life-span is long, but deficiency high, the high in cost of production that is pollution sensibility to fluid, oil strain required precision.The research of current existing axial piston pump is mainly divided into valve plate distribution, Flat valve, axle flow three kinds.Valve plate distribution relies on thrust plate hyperbaric chamber and low-pressure cavity to be separated, and valve plate distribution and axle flow all exist the friction pair that a face contacts, and due to the impact of machining accuracy, this friction pair has leakage to a certain degree.Further, due to the intrusion of environmental contaminants, the junction plane of friction pair can produce wearing and tearing, make the gap of friction pair junction plane become large, sealing effect is deteriorated, and leaks and strengthens.Under high pressure operating mode, high and low pressure chamber even can be made to be communicated with.Therefore, under middle high-pressure operating mode, valve plate distribution and axle flow are difficult to higher volumetric efficiency.Strong and the good sealing effect of the plunger pump contamination resistance of Flat valve, also can ensure high volumetric efficiency under the operating mode of high pressure.

Current existing Flat valve axial piston pump can be divided into again swash plate rotary rotary with cylinder body, wherein apply to be mainly cylinder body rotary, drive cylinder body to rotate by main shaft by spline joint, inevitably make cylinder body processed complex, flow-distributing valve group complicated layout difficulty, price rising; Swash plate is rotary to be mainly used in cambered axle pump, and swash plate rotary-plunger pump reduces internal load, and make starting torque lower, the life-span is longer.

Summary of the invention

The utility model object is for the deficiencies in the prior art, a kind of swash plate rotary internal Flat valve axial piston pump is provided, this pump has wide in range fluid applicability, and is applicable to use as water pump, have pressure high, leak little, antipollution, can the advantage of high-power output.

The purpose of this utility model is achieved through the following technical solutions: a kind of swash plate rotary internal Flat valve axial piston pump, the delivery valve group comprising front cover, the front pump housing, the pump shaft be arranged in the front pump housing, the bearing unit be arranged on pump shaft, black box, the rear pump housing, the swash plate be arranged in the rear pump housing, plunger piston slippery boots assembly, retracting spring, cylinder body, the suction valve group be arranged in cylinder body, rear end cover and be arranged in rear end cover; Wherein, described front cover, the front pump housing, the rear pump housing, cylinder body and rear end cover are fixedly connected sequentially; Described plunger piston slippery boots assembly is placed in cylinder interior plunger hole; Described swash plate is connected with pump shaft by spline.

Described bearing unit comprises the front deep groove ball bearing, front shaft sleeve, roller thrust bearing, rear axle housing, rear deep groove ball bearing and the end deep groove ball bearing that are connected successively; Cylinder body is connected with pump shaft by end deep groove ball bearing.

Described black box comprises bag bone seal ring and VS RunddichtringO in seal ring, Type B, and described seal ring is embedded in front cover, and in Type B, bag bone seal ring and VS RunddichtringO are embedded in front pump housing afterbody respectively, the rear pump housing is anterior.

Described suction valve group comprises a suction one-way valve axially placed, sucking one-way valve is embedded in cylinder body afterbody valve opening, wherein, each suction one-way valve comprises suction valve seat, sucks ball valve core, sucks spring seat and suck spring, suck spring housing outside at suction spring seat, and suction ball valve core is pressed on suction valve seat.

Described delivery valve group is a radial extrusion one-way valve placed, extruding one-way valve is embedded in the anterior valve opening of rear end cover, wherein, each extrusion one-way valve comprises extrusion valve seat, extrudes ball valve core, extrudes spring seat and extrude spring, extrude spring housing outside at extrusion spring seat, and extrusion ball valve core is pressed on extrusion valve seat.

Described plunger piston slippery boots assembly comprises piston shoes, plunger bushing and plunger; Described piston shoes are connected with plunger ball pivot, outside plunger, be embedded with plunger bushing; Retracting spring is placed in plunger center hole.

Further, described plunger adopts Martensitic Stain Less Steel heat treatment; Described plunger bushing is stupalith.

Further, described suction valve group and cylinder body are integral type structure.

Further, described delivery valve group and rear end cover are integral type structure.

Further, the center of described swash plate has splined hole.

The beneficial effect that the utility model has is: rational in infrastructure, easy to use, and adopt the rotary Flat valve mode of swash plate, simplify design, relative manufacture cost reduces a lot, is conducive to standardization and unitized work.

(1) structural type adopting fluid to be separated, utilize the good stupalith of the wear resistance be arranged on plunger bushing and be applicable to water lubrication medium, and adopt the structure that in Type B, bag bone seal ring and VS RunddichtringO match, all rolling bearings are all lubricated with oily medium, avoids the difficult problem that bearing selected by high-pressure service pump.

(2) adopt Flat valve structural type, reduce the friction pair of a pair axial piston pump key, corresponding leakage rate reduces, and volumetric efficiency improves, and the working pressure of pump improves.

(3) the built-in damascene structures of flow valve body, suction valve group and delivery valve group are embedded on cylinder body respectively and on rear end cover, its good seal performance, response is fast, and has the features such as impact is little, noise is low, can reach higher volumetric efficiency.

(4) cylindrical roller thrust bearing is adopted to support before and after rotary swash plate, embed deep groove ball bearing before and after thrust-bearing, form bearing pack, effectively assume responsibility for and act on axial force on swash plate and radial force, add the rigidity of swash plate, improve the operating life of pump entirety.

(5) plunger and plunger bushing adopt soft or hard to match, plunger adopts Martensitic Stain Less Steel heat treatment to improve hardness as far as possible to increase wear resistance, and makes plunger bushing with stupalith embedding, effectively improves the frictional behavior of trunk piston set, reduce the leakage of pump, improve the volumetric efficiency of pump.

(6) retracting spring---the structure of piston shoes, is pushed against plunger piston slippery boots assembly on swash plate by retracting spring in employing.This avoid the design of axial piston pump return plate, simple and reliable.

(7) adopt swash plate rotary structure, effectively overcome the deficiency of traditional cylinder body rotation type axial plunger pump, effectively simplify the design of cylinder body, reduce cylinder body stressed, improve the operating life of pump entirety, reduce cylinder size, reduce the processing cost of pump.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model swash plate rotary internal Flat valve axial piston pump;

In figure: bag bone seal ring 8, piston shoes 9, plunger bushing 10, plunger 11, retracting spring 12, suction valve seat 13, suction ball valve core 14, suction spring seat 15, suction spring 16 in pump shaft 1, front cover 2, front deep groove ball bearing 3, front shaft sleeve 4, roller thrust bearing 5, rear axle housing 6, rear deep groove ball bearing 7, Type B, extrude valve seat 17, extrusion ball valve core 18, extrusion spring seat 19, extrusion spring 20, rear end cover 21, cylinder body 22, end deep groove ball bearing 23, the rear pump housing 24, swash plate 25, VS RunddichtringO 26, the front pump housing 27, seal ring 28.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, a kind of swash plate rotary internal of the utility model Flat valve axial piston pump, the delivery valve group comprising front cover 2, the front pump housing 27, the pump shaft 1 be arranged in the front pump housing 27, the bearing unit be arranged on pump shaft 1, black box, the rear pump housing 24, the swash plate 25 be arranged in the rear pump housing 24, plunger piston slippery boots assembly, retracting spring 12, cylinder body 22, the suction valve group be arranged in cylinder body 22, rear end cover 21 and be arranged in rear end cover 21; Wherein, described front cover 2, the front pump housing 27, the rear pump housing 24, cylinder body 22 are fixedly connected sequentially with rear end cover 21; Described plunger piston slippery boots assembly is placed in cylinder body 22 inner post consent; Described swash plate 25 is connected with pump shaft 1 by spline, and swash plate 25 is rotated with pump shaft 1.

Described bearing unit comprises the front deep groove ball bearing 3, front shaft sleeve 4, roller thrust bearing 5, rear axle housing 6, rear deep groove ball bearing 7 and the end deep groove ball bearing 23 that are connected successively; Cylinder body 22 is connected with pump shaft 1 by end deep groove ball bearing 23.

The thrust of swash plate 25, on rear deep groove ball bearing 7, is passed to roller bearing 5 by rear axle housing 6, then is passed to front deep groove ball bearing 3 by front shaft sleeve 4, compresses eventually through front cover 2.

Described black box comprises bag bone seal ring 8 and VS RunddichtringO 26 in seal ring 28, Type B, described seal ring 28 is embedded in front cover 2, in Type B, bag bone seal ring 8 and VS RunddichtringO 27 are embedded in the front pump housing 27 afterbody respectively, the rear pump housing 24 is anterior, the sealing between the different medium liquid realizing pump inside.The structural type that this plunger pump adopts fluid to be separated, in pump, fluid is separated is that black box by being arranged on wear resistance on pump shaft 1 good realizes, and black box realizes the sealing of different piece in pump, solves the lubrication problem of bearing.

Described suction valve group is 9 suction one-way valves axially placed, sucking one-way valve is embedded in cylinder body 22 afterbody valve opening, wherein, each suction one-way valve comprises suction valve seat 13, sucks ball valve core 14, sucks spring seat 15 and suck spring 16, suck spring 16 and be enclosed within suction spring seat 15 outside, and suction ball valve core 14 is pressed on suction valve seat 13.

Described delivery valve group is 9 radial extrusion one-way valves placed, extruding one-way valve is embedded in the anterior valve opening of rear end cover 21, wherein, each extrusion one-way valve comprises extrusion valve seat 17, extrudes ball valve core 18, extrudes spring seat 19 and extrude spring 20, extrude spring 20 and be enclosed within extrusion spring seat 19 outside, and extrusion ball valve core 18 is pressed on extrusion valve seat 17.

Described suction valve group outlet and delivery valve group entrance are got through runner and are formed public cavity volume, this public cavity volume has flow valve port, flow valve port communicates with the bottom of plunger hole, and suction valve group entrance and the rear pump housing 24 inner chamber communicate, delivery valve group outlet and rear end cover 24 on central pit hole export communicate.

The working procedure of the utility model swash plate rotary internal Flat valve axial piston pump is as follows:

When pump shaft 1 drives swash plate 25 together to rotate clockwise, active force is uniformly applied on each piston shoes 9 by ball pivot by retracting spring 12, piston shoes 9 are close on swash plate 25 all the time slide, simultaneously reciprocating in the plunger hole of the swash plate 25 that rotated of plunger 11 to the active force of piston shoes 9 in cylinder body 22, cylinder body 22 transfixions.

When swash plate 25 moves to lower dead centre (swash plate positions following as shown in Figure 1) along clockwise direction, extrusion ball valve core 18 in delivery valve group is all in closed condition, piston shoes 9 drive plunger 11 to move upward under spring force, enclosed volume simultaneously in plunger vestibule increases, pressure reduces, when the pressure drop in vestibule is to a certain numerical value, suction ball valve core 14 in suction valve group can be greater than the pressure in plunger vestibule because of the pressure of ingress and suck spring 16 active force make a concerted effort be unlocked, fluid enters in the suction valve liquid entering hole plunger vestibule that feed pressure is low again by entrance, realize imbibition process.

When swash plate 25 moves to upper dead center (as shown in Figure 1 the swash plate positions of top) along clockwise direction, plunger 11 moves downward by the active force of swash plate 25, the volume of plunger vestibule can reduce gradually simultaneously, the pressure raised gradually is gathered the spring force sucking spring 16 in suction valve group on the one hand and is closed by suction ball valve core 14, overcome on the other hand making a concerted effort of the active force that extrudes ball spring 20 in delivery valve group and pump discharge pressure, extrusion ball valve core 18 is opened, make the high-voltage oil liquid in plunger vestibule flow into pump discharge through the outlet of delivery valve group to discharge, realize hydraulic fluid process.

When pump shaft 1 drives swash plate 25 to rotate a circle, each imbibition of each plunger 11, hydraulic fluid once, along with the continuous rotation of pump shaft 1, each plunger 11 also continuously complete independently inhale, the action of hydraulic fluid, thus plunger pump is normally worked.

Claims (4)

1. a swash plate rotary internal Flat valve axial piston pump, is characterized in that: the delivery valve group comprising front cover (2), the front pump housing (27), the pump shaft (1) be arranged in the front pump housing (27), the bearing unit be arranged on pump shaft (1), black box, the rear pump housing (24), the swash plate (25) be arranged in the rear pump housing (24), plunger piston slippery boots assembly, retracting spring (12), cylinder body (22), the suction valve group be arranged in cylinder body (22), rear end cover (21) and be arranged in rear end cover (21); Wherein, described front cover (2), the front pump housing (27), the rear pump housing (24), cylinder body (22) are fixedly connected sequentially with rear end cover (21); Described plunger piston slippery boots assembly is placed in cylinder body (22) inner post consent; Described swash plate (25) is connected with pump shaft (1) by spline;
Described bearing unit comprises the front deep groove ball bearing (3), front shaft sleeve (4), roller thrust bearing (5), rear axle housing (6), rear deep groove ball bearing (7) and the end deep groove ball bearing (23) that are connected successively; Cylinder body (22) is connected with pump shaft (1) by end deep groove ball bearing (23);
Described black box comprises bag bone seal ring (8) and VS RunddichtringO (26) in seal ring (28), Type B, described seal ring (28) is embedded in front cover (2), and in Type B, bag bone seal ring (8) and VS RunddichtringO (27) are embedded in the front pump housing (27) afterbody respectively, the rear pump housing (24) is anterior;
Described suction valve group comprises 9 suction one-way valves axially placed, and sucks one-way valve and is embedded in cylinder body (22) afterbody valve opening; Wherein, each suction one-way valve comprises suction valve seat (13), sucks ball valve core (14), sucks spring seat (15) and suck spring (16), suck spring (16) and be enclosed within that to suck spring seat (15) outside, and will suck ball valve core (14) and be pressed in suction valve seat (13);
Described delivery valve group is 9 radial extrusion one-way valves placed, and extrudes one-way valve and is embedded in rear end cover (21) anterior valve opening; Wherein, each extrusion one-way valve comprises extrusion valve seat (17), extrudes ball valve core (18), extrudes spring seat (19) and extrude spring (20), extrude spring (20) and be enclosed within that to extrude spring seat (19) outside, and will extrude ball valve core (18) and be pressed in extrusion valve seat (17);
Described plunger piston slippery boots assembly comprises piston shoes (9), plunger bushing (10) and plunger (11); Described piston shoes (9) are connected with plunger (11) ball pivot, are embedded with plunger bushing (10) in plunger (11) outside; Retracting spring (12) is placed in plunger (11) center hole.
2. a kind of swash plate rotary internal Flat valve axial piston pump according to claim 1, is characterized in that: described suction valve group and cylinder body (22) are integral type structure.
3. a kind of swash plate rotary internal Flat valve axial piston pump according to claim 1, is characterized in that: described delivery valve group and rear end cover (21) are integral type structure.
4. a kind of swash plate rotary internal Flat valve axial piston pump according to claim 1, is characterized in that: the center of described swash plate (25) has splined hole.
CN201420777025.8U 2014-12-11 2014-12-11 A kind of swash plate rotary internal Flat valve axial piston pump CN204357643U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420777025.8U CN204357643U (en) 2014-12-11 2014-12-11 A kind of swash plate rotary internal Flat valve axial piston pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420777025.8U CN204357643U (en) 2014-12-11 2014-12-11 A kind of swash plate rotary internal Flat valve axial piston pump

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CN204357643U true CN204357643U (en) 2015-05-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104454420A (en) * 2014-12-11 2015-03-25 浙江大学 Inclined-disc-rotating internally-disposed valve flow distribution axial plunger pump
CN106401892A (en) * 2016-12-13 2017-02-15 荆门市召铭液压科技有限公司 Low-noise swash-plate axial plunger pump
CN108105047A (en) * 2017-12-30 2018-06-01 徐秀芳 A kind of inclined disc type oscillating plunger pump of complete dynamic balance
CN108302000A (en) * 2017-12-30 2018-07-20 孟庆仕 A kind of inclined disc type oscillating plunger pump of balanced radial force
CN111288146A (en) * 2020-02-14 2020-06-16 株洲齿轮有限责任公司 Transmission and automobile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104454420A (en) * 2014-12-11 2015-03-25 浙江大学 Inclined-disc-rotating internally-disposed valve flow distribution axial plunger pump
CN104454420B (en) * 2014-12-11 2016-08-17 浙江大学 Swash plate rotary internal Flat valve axial plunger pump
CN106401892A (en) * 2016-12-13 2017-02-15 荆门市召铭液压科技有限公司 Low-noise swash-plate axial plunger pump
CN108105047A (en) * 2017-12-30 2018-06-01 徐秀芳 A kind of inclined disc type oscillating plunger pump of complete dynamic balance
CN108302000A (en) * 2017-12-30 2018-07-20 孟庆仕 A kind of inclined disc type oscillating plunger pump of balanced radial force
CN111288146A (en) * 2020-02-14 2020-06-16 株洲齿轮有限责任公司 Transmission and automobile

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150527

Termination date: 20161211