CN102865207B - Axially swash plate type hydraulic plunger pump - Google Patents
Axially swash plate type hydraulic plunger pump Download PDFInfo
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- CN102865207B CN102865207B CN201210274384.7A CN201210274384A CN102865207B CN 102865207 B CN102865207 B CN 102865207B CN 201210274384 A CN201210274384 A CN 201210274384A CN 102865207 B CN102865207 B CN 102865207B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The invention discloses axial swash plate type hydraulic plunger pump, include double step thrust piston, the a mouth of double step thrust piston, before b mouth is connected respectively to, on rear pump, the plunger end face overhead of double step thrust piston is in regulation lever end face, it is set with power pogo on regulation lever, the rear side pressure of power pogo is equipped with spring base, the end pressure of regulation lever is equipped with the spool of power control valve, spool is provided with step, power control valve has two hydraulic fluid port d mouths, c mouth, spring base is fixedly connected with flow piston, the valve pocket of the little side of flow piston and a mouth of double step thrust piston, the c mouth of power control valve connects, the c mouth of the valve pocket power control valve of the big side of flow piston connects, flow piston is fixing with the swash plate of plunger displacement pump to be connected.Owing to flow piston large end face is long-pending more than small end area, it is achieved in pressure to increase, flow reduces, realize variable displacement with constant power, otherwise when load reduces, and the pressure at flow piston two ends reduces therewith, decrement when now power pogo is also maintained at high pressure, the hydraulic coupling of the big end of flow piston reduces, and flow increases, and control mode is reasonable.
Description
Technical field
The present invention relates to axial swash plate type hydraulic plunger pump.
Background technology
Plunger displacement pump operation principle, plunger displacement pump is the one of reciprocating pump, belongs to volume pump, and its plunger drives by the eccentric rotary of pump shaft, moves back and forth, and it sucks and dump valve is all check valve.When drawing outside plunger, work room pressure reduces, and outlet valve cuts out, and during less than inlet pressure, inlet valve is opened, and liquid enters；When pushing away in plunger, chamber pressure raises, and inlet valve cuts out, and during higher than outlet pressure, outlet valve is opened, and liquid is discharged.
Axial plunger pump with piston shoes structure is currently used widest axial plunger pump, and the plunger being placed in cylinder body is contacted with swash plate by piston shoes, and when power transmission shaft drives cylinder body to rotate, plunger is pulled out from cylinder body or pushes back by swash plate, completes suction oil process.Fluid in the working volumes that plunger forms with cylinder holes is communicated with suction, the oil-discharging cavity of pump respectively by oil distribution casing.Stroking mechanism is used for changing the inclination angle of swash plate, can change pump delivery by the inclination angle of regulation swash plate.But, existing plunger displacement pump pressure regulation sensitivity is poor, it is difficult to ensure that load change can regulate the oil mass of oil pump in real time.
Summary of the invention
It is an object of the invention to provide a kind of axially swash plate type hydraulic plunger pump, owing to flow piston large end face is long-pending more than small end area, being achieved in pressure to increase, flow reduces, it is achieved variable displacement with constant power, otherwise when load reduces, the pressure at flow piston two ends reduces therewith, decrement when now power pogo is also maintained at high pressure, and the hydraulic coupling of the big end of flow piston reduces, flow increases, and control mode is reasonable.
Technical scheme is as follows:
Axially swash plate type hydraulic plunger pump, include double step thrust piston, the a mouth of double step thrust piston, before b mouth is connected respectively to, on rear pump, the plunger end face overhead of double step thrust piston is in regulation lever end face, it is set with power pogo on regulation lever, the rear side pressure of power pogo is equipped with spring base, the front side pressure of regulation lever is equipped with the spool of power control valve, spool is provided with step, power control valve has two hydraulic fluid port d mouths, c mouth, spring base is fixedly connected with flow piston, the valve pocket of the little side of flow piston and a mouth of double step thrust piston, the c mouth of power control valve connects, the valve pocket of the big side of flow piston is connected with the d mouth of power control valve, flow piston is fixing with the swash plate of plunger displacement pump to be connected.
The rear end of described regulation lever is fixed with fixing seat, and fixing pressure between seat and spring base puts power pogo.
The control mode of the present invention is reasonable, and pressure regulation sensitivity improves, it is ensured that loads and changes the oil mass that can regulate oil pump in real time, thus the pressure size of oil circuit control, the serviceability of load sensitive pump has been effectively ensured.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the connection diagram between double step thrust piston and power control valve.
Detailed description of the invention
nullSee accompanying drawing，Axially swash plate type hydraulic plunger pump，Include double step thrust piston 1，The a mouth of double step thrust piston 1、Before b mouth is connected respectively to、On rear pump，The plunger end face overhead of double step thrust piston 1 is in regulation lever 2 end face，It is set with power pogo 3 on regulation lever 2，The rear side pressure of power pogo 3 is equipped with spring base 4，The front side pressure of regulation lever 2 is equipped with the spool 6 of power control valve 5，Spool 6 is provided with step，Power control valve 5 has two hydraulic fluid port d mouths、C mouth，Spring base is fixedly connected with flow piston 7，The valve pocket of the little side of flow piston 7 and a mouth of double step thrust piston、The c mouth of power control valve connects，The valve pocket of the big side of flow piston is connected with the d mouth of power control valve，Flow piston 7 is fixing with the swash plate of plunger displacement pump 8 to be connected，The rear end of regulation lever is fixed with fixing seat 9，Fixing pressure between seat 9 and spring base puts power pogo 3.
The thrust piston of the double step of the present invention, a mouth connects the pressure oil of another pump (rear pump) of duplex plunger displacement pump, and b mouth connects the pressure oil of this pump (front pump), and front and back pump respectively draws a road binders to thrust piston, realizes double pump cross-over control.nullIncrease along with load pressure，a、The pressure of b two hydraulic fluid port is also with increase，Thrust piston promotes regulation lever compression horsepower spring to promote spool，When power pogo is compressed to a certain degree, d mouth disconnects with e mouth，D mouth is connected with c mouth，At this moment the big end of flow piston begins to oil-feed，Because ' power=pressure × active area ' flow piston pressure at two ends is identical，Large end face is long-pending more than small end area，So flow piston can be moved to the left (flow reduction) under the effect of hydraulic coupling，Flow piston is moved to the left drive shifting block and promotes spring base further compression horsepower spring，Make thrust piston and regulation lever the most to the left，Spool is moved to the left the most therewith，C mouth and d mouth disconnect，Flow piston big end fuel cut-off，Flow piston stops mobile，It is achieved in pressure to increase，Flow reduces，Make: pressure × flow=steady state value，Realize variable displacement with constant power.Otherwise when load reduces, the pressure at flow piston two ends reduces therewith, decrement when now power pogo is also maintained at high pressure, the hydraulic coupling of the big end of flow piston reduces, i.e. spring force is more than the hydraulic coupling of the big end of flow piston, power pogo just promotes shifting block to drive flow piston (end greatly) to the right mobile, and flow increases.
Claims (1)
1. axial swash plate type hydraulic plunger pump, include double step thrust piston, it is characterized in that: a mouth of double step thrust piston, before b mouth is connected respectively to, on rear pump, the plunger end face overhead of double step thrust piston is in regulation lever end face, it is set with power pogo on regulation lever, the rear side pressure of power pogo is equipped with spring base, the front side pressure of regulation lever is equipped with the spool of power control valve, spool is provided with step, power control valve has two hydraulic fluid port d mouths, c mouth, spring base is fixedly connected with flow piston, the valve pocket of the little side of flow piston and a mouth of double step thrust piston, the c mouth of power control valve connects, the valve pocket of the big side of flow piston is connected with the d mouth of power control valve, flow piston is fixing with the swash plate of plunger displacement pump to be connected；
The rear end of described regulation lever is fixed with fixing seat, and fixing pressure between seat and spring base puts power pogo；Flow piston moves drive shifting block and promotes spring base to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274384.7A CN102865207B (en) | 2012-08-01 | 2012-08-01 | Axially swash plate type hydraulic plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210274384.7A CN102865207B (en) | 2012-08-01 | 2012-08-01 | Axially swash plate type hydraulic plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102865207A CN102865207A (en) | 2013-01-09 |
| CN102865207B true CN102865207B (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210274384.7A Expired - Fee Related CN102865207B (en) | 2012-08-01 | 2012-08-01 | Axially swash plate type hydraulic plunger pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN102865207B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234118B (en) * | 2013-12-13 | 2017-01-04 | 江苏恒立液压科技有限公司 | Mini-excavator pump |
| CH714321A1 (en) * | 2017-11-11 | 2019-05-15 | Liebherr Machines Bulle Sa | Adjusting device for an axial piston machine. |
| CN109854471B (en) * | 2019-02-01 | 2024-05-14 | 中航力源液压股份有限公司 | Hydraulic plunger pump of two-gear power control device |
| CN111980977B (en) * | 2020-07-24 | 2022-09-20 | 中国航空工业集团公司西安飞行自动控制研究所 | Cross power control valve for duplex hydraulic pump and duplex hydraulic pump |
| CN114135458A (en) * | 2021-11-30 | 2022-03-04 | 力源液压（苏州）有限公司 | Constant power control structure of plunger pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1906983A1 (en) * | 1969-02-07 | 1970-09-17 | Bellows Valvair Kaemper Gmbh | Device for keeping the product of pressure and stroke volume constant in positive displacement pumps |
| US5297941A (en) * | 1991-11-30 | 1994-03-29 | Samsung Heavy Industries Co., Ltd. | Control systems for hydraulic pumps of the variable displacement type |
| CN200952456Y (en) * | 2006-08-29 | 2007-09-26 | 陕西航天动力高科技股份有限公司 | Axial variable plunger pump |
| CN201560933U (en) * | 2009-10-22 | 2010-08-25 | 天津市泽华源泵业科技发展有限公司 | Self-assignment constant-power variable valve core mechanism |
| CN202937418U (en) * | 2012-08-01 | 2013-05-15 | 安徽博一流体传动股份有限公司 | Axial swash plate type hydraulic plunger pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10246177A (en) * | 1997-03-04 | 1998-09-14 | Kawasaki Heavy Ind Ltd | Double delivery swash plate type hydraulic piston pump |
-
2012
- 2012-08-01 CN CN201210274384.7A patent/CN102865207B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1906983A1 (en) * | 1969-02-07 | 1970-09-17 | Bellows Valvair Kaemper Gmbh | Device for keeping the product of pressure and stroke volume constant in positive displacement pumps |
| US5297941A (en) * | 1991-11-30 | 1994-03-29 | Samsung Heavy Industries Co., Ltd. | Control systems for hydraulic pumps of the variable displacement type |
| CN200952456Y (en) * | 2006-08-29 | 2007-09-26 | 陕西航天动力高科技股份有限公司 | Axial variable plunger pump |
| CN201560933U (en) * | 2009-10-22 | 2010-08-25 | 天津市泽华源泵业科技发展有限公司 | Self-assignment constant-power variable valve core mechanism |
| CN202937418U (en) * | 2012-08-01 | 2013-05-15 | 安徽博一流体传动股份有限公司 | Axial swash plate type hydraulic plunger pump |
Non-Patent Citations (1)
| Title |
|---|
| 恒功率变量泵的特性研究;史时喜;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20100315(第3期);C08-109 * |
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| CN102865207A (en) | 2013-01-09 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Axial swash plate type hydraulic plunger pump Effective date of registration: 20170922 Granted publication date: 20160803 Pledgee: Hefei Xingtai financing guarantee Group Ltd. Pledgor: ANHUI BOYI FLUID POWER TRANSMISSION JOINT STOCK Co.,Ltd. Registration number: 2017340000244 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181029 Granted publication date: 20160803 Pledgee: Hefei Xingtai financing guarantee Group Ltd. Pledgor: ANHUI BOYI FLUID POWER TRANSMISSION JOINT STOCK Co.,Ltd. Registration number: 2017340000244 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 |