CN103711689A - High pressure hydraulic pump plunger of hollow structure - Google Patents
High pressure hydraulic pump plunger of hollow structure Download PDFInfo
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- CN103711689A CN103711689A CN201410010479.7A CN201410010479A CN103711689A CN 103711689 A CN103711689 A CN 103711689A CN 201410010479 A CN201410010479 A CN 201410010479A CN 103711689 A CN103711689 A CN 103711689A
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Abstract
The invention provides a high pressure hydraulic pump plunger of a hollow structure. The hydraulic pump plunger comprises a sliding shoe and a plunger body, wherein the sliding shoe and the plunger body are matched to form an arc-shaped hinge structure through a spherical groove in the sliding shoe and a spherical body on the plunger body, an opening is formed in one end of the plunger body, a stepped hole is formed in the end, with the opening, of the plunger body in the axial direction, a through hole is formed in the bottom face of the stepped hole, and a through hole is formed in the sliding shoe along the axial line of the sliding shoe. The hydraulic pump plunger further comprises an oil pipe and a bottom cover, wherein a cylindrical clamping table is machined on the end face of one end of the bottom cover, a mounting hole is formed in the cylindrical clamping table in the axial direction, and a through hole is formed in the bottom face of the mounting hole. The bottom cover is mounted at the end, with the opening, of the plunger body, the cylindrical clamping table of the bottom cover is matched with the top end of the stepped hole of the plunger body, the oil pipe is also mounted in the stepped hole of the plunger body, the end face of one end of the oil pipe butts against the bottom face of the stepped hole, the end face of the other end of the oil pipe butts against the bottom face of the mounting hole of the bottom cover, and the oil pipe is respectively communicated with the through hole in the sliding shoe and the through hole in the bottom cover. According to the high pressure hydraulic pump plunger of the hollow structure, the choke-out volume of the hydraulic pump plunger can be reduced, and the working reliability of a hydraulic pump can be improved.
Description
Technical field
The present invention relates to a kind of hydraulic pump plunger, be specifically related to a kind of hollow-core construction high-pressure and hydraulic pump plunger, belong to Fluid Transmission and Control (hydraulic transmission) technical field.
Background technique
Axial piston pump has that working pressure is high, rotating speed is high, efficiency advantages of higher, in fields such as industrial or agricultural and national defence, is widely applied.Along with the application of new material,, the needs of the raising of mechanical processing technique and engineering application, axial piston pump is to high-pressure trend future development.
Plunger piston slippery boots assembly (conventionally referred to as plunger) is one of core parts of axial piston pump, in the Design and manufacturing process of oil hydraulic pump, in order to reduce the quality of plunger piston slippery boots assembly, conventionally plunger is made to hollow-core construction.
Plunger adopts after hollow-core construction, " dead volume " of plunger cavity increased, as shown in Figure 2 (a) shows, the consequence of bringing is thus: (1) is when plunger cavity enters low pressure oil suction district by high pressure oil extraction district, high-voltage oil liquid in " dead volume " can expand rapidly and enter low pressure oil suction district, produce larger compression shock, vibration and noise, even occur cavitation phenomenon, cause component wear; (2) expansion due to high-voltage oil liquid has occupied a part of plunger cavity volume, and long-pending the reducing of low pressure oil liquid that causes plunger cavity to suck from low pressure oil suction district, finally causes the actual displacement of pump to reduce, and the volumetric efficiency that externally shows as pump reduces.
The problems referred to above affect less when hydraulic pump works pressure is lower, when working pressure is higher, can not be ignored.
Summary of the invention
In view of this, the invention provides a kind of hollow-core construction high-pressure and hydraulic pump plunger, can reduce " dead volume " of hydraulic pump plunger, thereby improve the functional reliability of oil hydraulic pump.
A kind of hollow-core construction high-pressure and hydraulic pump plunger, this hydraulic pump plunger comprises piston shoes and piston body, both coordinate formation curved hinge structure by the ball recess on piston shoes with the spheroid in piston body, piston body one end opening is also processed with step hole vertically, step hole bottom surface is processed with through hole, and piston shoes are also processed with through hole along its central axis;
Described hydraulic pump plunger also comprises oil pipe and bottom, is processed with cylindrical Ka Tai on the end face of bottom one end, is processed with vertically mounting hole on cylindrical Ka Tai, and mounting hole bottom surface is processed with through hole; Bottom is arranged on the opening end of piston body, the cylindrical Ka Tai of bottom coordinates with piston body step hole top, oil pipe is also arranged in the step hole of piston body, conflict in one end-face and step hole bottom surface, conflict in the mounting hole bottom surface of the other end end face and bottom, oil pipe is connected with through hole on piston shoes and bottom respectively.
The end face of the described bottom the other end is segment-shaped structure.
Beneficial effect:
The present invention adopts bottom by the opening end sealing of piston body, reduced " dead volume " of hydraulic pump plunger, under high pressure operating mode, improved the effective discharge of oil hydraulic pump, can reduce compression shock and the cavitation phenomenon of plunger in high low pressure transfer process, reduce noise, thereby improve the functional reliability of oil hydraulic pump; In addition adopt oil pipe that high pressure oil is directed to grease chamber, piston shoes bottoms, mineralization pressure supports, thereby and can hinder by changing the length of through hole on each assembly and liquid that diameter changes logical oil circuit, improve the hydraulic pressure support state of piston shoes.
Accompanying drawing explanation
Fig. 1 is the structural drawing of hollow-core construction high-pressure and hydraulic pump plunger of the present invention.
Fig. 2 is relatively schematic diagram of hydraulic pump plunger of the present invention chamber " dead volume ".
Wherein, 1-piston shoes, 2-piston body, 3-oil pipe, 4-bottom
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
As shown in Figure 1, the invention provides a kind of hollow-core construction high-pressure and hydraulic pump plunger, this hydraulic pump plunger comprises piston shoes 1, piston body 2, oil pipe 3 and bottom 4.
Meeting under the prerequisite that plunger stiffness requires, piston body 2 is still hollow-core construction, has alleviated plunger quality, and the inertial force having produced while having reduced plunger high-speed motion is conducive to improve the working speed of oil hydraulic pump.Piston body 2 is comprised of spheroid and cylindrical body, between spherical and circumferential surface, adopts arc transition, is processed with vertically step hole on cylindrical end face, and step hole bottom surface is processed with the through hole that runs through spheroid.
" dead volume " when reducing hydraulic pump works, with bottom 4, the opening end of piston body 2 is closed, make high pressure oil can not enter the inner chamber of piston body 2, one side end face of bottom 4 is that " segment-shaped " structure is arcuate structure, be similar to architectural " dome " or " arch ", can improve the bearing capacity of bottom 4, opposite side end face is processed with seam, the cylindrical Ka Tai coordinating with piston body 2 opening ends, on cylindrical Ka Tai, be processed with vertically mounting hole, mounting hole bottom surface is processed with through hole.
Piston shoes 1 are cylindrical body, and the top of its circumferential surface is processed with mounting flange, on a side end face, are processed with counterbore as grease chamber, and the processing of counterbore bottom, is processed with circular groove on opposite side end face.
In order to make the high-voltage oil liquid of piston body 2 inner chambers can enter into piston shoes 1 grease chamber, bottom mineralization pressure, support, with an oil pipe 3, bottom 4 and piston shoes main body 2 are coupled together, each through hole series connection forms path.
Its annexation is: piston shoes 1 are connected by spherical linkage structure with piston body 2, the spheroid that is piston body 2 coordinates with the circular groove of piston shoes 1, the opening end of piston body 2 is installed bottom 4, coordinate with the cylindrical Ka Tai of bottom 4, the step hole bottom surface that piston body 2 is inserted in oil pipe 3 one end, the other end inserts in the mounting hole of bottom 4, adopts interference fit and cold charge technique, through hole on each element forms series relationship, makes high pressure oil enter into piston shoes 1 grease chamber, bottom from plunger cavity.
High-pressure and hydraulic pump plunger of the present invention is arranged on oil hydraulic pump, can be applied to high pressure axial-piston hydraulic motor equally, as shown in Fig. 2 (b), its enclosed volume reduces greatly, when hydraulic pump plunger is worked, its compression shock, vibration and noise that acts on the generation of enclosed volume reduces greatly.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a hollow-core construction high-pressure and hydraulic pump plunger, this hydraulic pump plunger comprises piston shoes (1) and piston body (2), both coordinate formation curved hinge structure by the ball recess on piston shoes (1) with the spheroid in piston body (2), piston body (2) one end openings are also processed with step hole vertically, step hole bottom surface is processed with through hole, and piston shoes (1) are also processed with through hole along its central axis;
It is characterized in that, described hydraulic pump plunger also comprises oil pipe (3) and bottom (4), on the end face of bottom (4) one end, is processed with cylindrical Ka Tai, is processed with vertically mounting hole on cylindrical Ka Tai, and mounting hole bottom surface is processed with through hole; Bottom (4) is arranged on the opening end of piston body (2), the cylindrical Ka Tai of bottom (4) coordinates with piston body (2) step hole top, oil pipe (3) is also arranged in the step hole of piston body (2), conflict in one end-face and step hole bottom surface, conflict in the mounting hole bottom surface of the other end end face and bottom (4), oil pipe (3) is connected with piston shoes (1) and the upper through hole of bottom (4) respectively.
2. hollow-core construction high-pressure and hydraulic pump plunger as claimed in claim 1, is characterized in that, the end face of described bottom (4) the other end is segment-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010479.7A CN103711689A (en) | 2014-01-09 | 2014-01-09 | High pressure hydraulic pump plunger of hollow structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410010479.7A CN103711689A (en) | 2014-01-09 | 2014-01-09 | High pressure hydraulic pump plunger of hollow structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103711689A true CN103711689A (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410010479.7A Pending CN103711689A (en) | 2014-01-09 | 2014-01-09 | High pressure hydraulic pump plunger of hollow structure |
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| CN (1) | CN103711689A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889059A (en) * | 2016-05-31 | 2016-08-24 | 宁波派锐森液压有限公司 | Hollow plunger and machining technology thereof |
| CN106438336A (en) * | 2016-10-28 | 2017-02-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Plunger pair structure used for ultra-high-pressure axial plunger pump |
| WO2020101027A1 (en) * | 2018-11-15 | 2020-05-22 | 株式会社小松製作所 | Piston, and hydraulic pump/motor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4191095A (en) * | 1976-11-26 | 1980-03-04 | Linde Ag | Hollow piston for hydrostatic machines |
| US4216704A (en) * | 1976-11-26 | 1980-08-12 | Linde Aktiengesellschaft | Piston for a hydrostatic axial-piston machine |
| US5265331A (en) * | 1992-01-16 | 1993-11-30 | Caterpillar Inc. | Method of manufacturing a piston for an axial piston fluid translating device |
| CN1087971A (en) * | 1992-12-05 | 1994-06-15 | 杜长春 | Axial plunger type variable capacity pump |
| EP1248906A2 (en) * | 1999-07-21 | 2002-10-16 | Brueninghaus Hydromatik Gmbh | Piston arrangement for a piston engine |
| EP1336449B1 (en) * | 2002-02-18 | 2006-04-19 | Brueninghaus Hydromatik Gmbh | Hollow piston and method for manucturing it by diffusion welding or sintering |
| CN101956686A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Position-spring-force feedback type electric proportional variable axial plunger pump |
| CN202746131U (en) * | 2012-08-20 | 2013-02-20 | 重庆市朗泰机械有限公司 | Swash plate type variable displacement piston pump |
| CN203879734U (en) * | 2014-01-09 | 2014-10-15 | 北京理工大学 | High pressure hydraulic pump plunger of hollow structure |
-
2014
- 2014-01-09 CN CN201410010479.7A patent/CN103711689A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4191095A (en) * | 1976-11-26 | 1980-03-04 | Linde Ag | Hollow piston for hydrostatic machines |
| US4216704A (en) * | 1976-11-26 | 1980-08-12 | Linde Aktiengesellschaft | Piston for a hydrostatic axial-piston machine |
| US5265331A (en) * | 1992-01-16 | 1993-11-30 | Caterpillar Inc. | Method of manufacturing a piston for an axial piston fluid translating device |
| CN1087971A (en) * | 1992-12-05 | 1994-06-15 | 杜长春 | Axial plunger type variable capacity pump |
| EP1248906A2 (en) * | 1999-07-21 | 2002-10-16 | Brueninghaus Hydromatik Gmbh | Piston arrangement for a piston engine |
| EP1336449B1 (en) * | 2002-02-18 | 2006-04-19 | Brueninghaus Hydromatik Gmbh | Hollow piston and method for manucturing it by diffusion welding or sintering |
| CN101956686A (en) * | 2010-10-21 | 2011-01-26 | 吴赛珍 | Position-spring-force feedback type electric proportional variable axial plunger pump |
| CN202746131U (en) * | 2012-08-20 | 2013-02-20 | 重庆市朗泰机械有限公司 | Swash plate type variable displacement piston pump |
| CN203879734U (en) * | 2014-01-09 | 2014-10-15 | 北京理工大学 | High pressure hydraulic pump plunger of hollow structure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889059A (en) * | 2016-05-31 | 2016-08-24 | 宁波派锐森液压有限公司 | Hollow plunger and machining technology thereof |
| CN105889059B (en) * | 2016-05-31 | 2018-07-03 | 宁波派锐森液压有限公司 | A kind of hollow plunger processing technology |
| CN106438336A (en) * | 2016-10-28 | 2017-02-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Plunger pair structure used for ultra-high-pressure axial plunger pump |
| WO2020101027A1 (en) * | 2018-11-15 | 2020-05-22 | 株式会社小松製作所 | Piston, and hydraulic pump/motor |
| JP2020084775A (en) * | 2018-11-15 | 2020-06-04 | 株式会社小松製作所 | Piston and hydraulic pump and motor |
| CN112888858A (en) * | 2018-11-15 | 2021-06-01 | 株式会社小松制作所 | Piston and hydraulic pump/motor |
| JP7228994B2 (en) | 2018-11-15 | 2023-02-27 | 株式会社小松製作所 | Piston and hydraulic pump/motor |
| CN112888858B (en) * | 2018-11-15 | 2024-01-16 | 株式会社小松制作所 | Piston and hydraulic pump/motor |
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Application publication date: 20140409 |