CN102330667B - Plunger pump with self-controlled type cross total power control and variable power - Google Patents
Plunger pump with self-controlled type cross total power control and variable power Download PDFInfo
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- CN102330667B CN102330667B CN201110303045.2A CN201110303045A CN102330667B CN 102330667 B CN102330667 B CN 102330667B CN 201110303045 A CN201110303045 A CN 201110303045A CN 102330667 B CN102330667 B CN 102330667B
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- mouth
- pump
- plunger
- piston
- power control
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- 239000002828 fuel tank Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a plunger pump with self-controlled type cross total power control and variable power. The plunger pump comprises a median energy-saving valve, a constant power control valve and a pump capacity plunger, wherein valve cores are respectively arranged in the median energy-saving valve and the constant power control valve, a piston of the pump capacity plunger and a tilting tray of the pump are arranged in a linkage mode, a shifting block is fixed on the piston of the pump capacity plunger, the interior of the shifting block is provided with a stepped thrust piston coordinated with the shifting block, the top of the stepped thrust piston is provided with a convex spherical surface, the convex spherical surface is articulated with a ball end, the upper end of the ball end is provided with a sliding shoe, the top of the sliding shoe is abutted against the lower end face of a right-angle rotating block, the other end of the right-angle rotating block is pressed on the right end of the valve core of the constant power control valve, a lower cavity of the stepped thrust piston is communicated with a left cavity of the pump capacity plunger, the left cavity of the pump capacity plunger is connected with a port C of the constant power control valve, and a right cavity of the pump capacity plunger is connected with a port E of the median energy-saving valve. The plunger pump provided by the invention can realize the purpose of controlling crossed constant power and variable power, greatly improve the reasonable use of the power a hydraulic pump and ensure the effective utilization of the power.
Description
Technical field
The present invention relates to plunger pump field, specifically belong to the plunger pump of the control of controlled type cross total output and change power.
Background technique
Hydraulic transmission is compared with traditional mechanical transmission, there is transmission power large, regulate and control conveniently, stable drive, the series of advantages such as speed adjustable range is wide, at particularly construction machinery industry of modern mechanical, use more and more widely hydraulic transmission, and oil hydraulic pump is as the core parts of hydraulic system, the height of its technical merit and performance, determine that to a great extent the overall performance of main frame and quality are because plunger pump can reach very high pressure and rotating speed, variable is easy, compact structure, the advantages such as specific power volume is little, in modern hydraulic transmission, plunger pump is to use one of the widest Hydraulic power units, from more than ten thousand tons heavy hydraulic press to small-sized hydraulic fixture, the stationary machine of using from general industry is to traveling vehicle, from civilian machinery to military weapon, it is all relatively very ripe all having used widely the most hydraulic element of plunger pump itself, but in order to improve working life and the overall performance of plunger pump, engineer and relevant researcher never stop the improvement to plunger pump, particularly axial piston pump excavator is equipment important in engineering construction, for bargh, construction industrys etc. are absolutely necessary, the power plant that it uses are exactly will complete revolution in the work of axial piston pump excavator, dipper, swing arm, scraper bowl, the actions such as walking, and working environment is complicated severe.
Summary of the invention
The object of this invention is to provide the plunger pump of the control of a kind of controlled type cross total output and change power, can realize the control object of intersecting permanent power, becoming power, the power that has greatly improved oil hydraulic pump rationally uses, and has ensured effective utilization of power.
Technological scheme of the present invention is as follows:
The plunger pump of the control of controlled type cross total output and change power, include meta energy-saving valve, constant power control valve, this pump duty plunger, in meta energy-saving valve, constant power control valve, be respectively equipped with spool, the swash plate interlock of the piston of this pump duty plunger and this pump arranges, the left end overhead of described spool has spring, on the valve body of constant power control valve, have A mouth, B mouth, C mouth, on the valve body of meta energy-saving valve, have D mouth, E mouth, F mouth, A mouth is connected to fuel tank, B mouth is connected with D mouth, F mouth is connected with C mouth, and C mouth is communicated with F mouth and is connected to main pump outlet; On the piston of this pump duty plunger, be fixed with shifting block, in shifting block, be combined with step thrust piston, the top of step thrust piston is provided with protruding sphere, on protruding sphere, be hinged with bulb, the upper end of bulb has piston shoes, the upper end rest of piston shoes is on the lower end surface of right angle switch block, the other end of right angle switch block is pressed on the right-hand member of constant power control valve spool, the cavity of resorption of step thrust piston is communicated in the left chamber of this pump duty plunger, the left chamber of this pump duty plunger is connected with the C mouth of constant power control valve, and the right chamber of this pump duty plunger is connected with meta energy-saving valve E mouth.
The cavity of establishing between two-stage step on described step thrust piston is communicated with high-pressure oil duct, and high-pressure oil duct communicates with his pump, and the one-level step that is positioned at below is communicated with inflow pipeline, and inflow pipeline communicates with the left chamber of this pump duty plunger.
The right side of described right angle switch block is provided with and becomes power plunger, and the piston top that becomes power plunger is placed in the right side of right angle switch block.
Thrust step plunger type constant output pump of the present invention is by the shifting block being fixed on flow piston, step thrust piston forms, can move with the movement of flow piston, the inflow pipeline that the inner chamber of shifting block and flow piston small end are offered is come round, be provided with the step thrust piston of step at shifting block inner chamber, the mode that the top of step thrust plunger adopts protruding sphere and concave spherical surface to inlay, move up and down and in causing rotating right angle switch block and rotating at step plunger, step thrust plunger can shift by sphere can uniform stressed, sliding friction while having avoided greatly there is no thrust column cock body top piston shoes, and plunger body is subject to the problem of angular force, because of the movement of step thrust piston more flexible, can solve in the time that thrust column rises beyond the Great Wall at all exist because of the static friction shake producing that suddenly disappears, and plunger is subject to angular force compared with the stressed problem of dtmf distortion DTMF of Vertical direction large and that cause.Step thrust piston is established two-stage step and is connected high-pressure oil duct, and high-pressure oil duct communicates with inflow pipeline, and the upper-end surface of thrust piston is provided with spherical boss, and for cushioning and the active force of balanced piston shoes face, permanent power adjustments is stablized in realization.
When pump initialization of the present invention, meta energy-saving valve spool under the effect of spring force in low order end, D mouth and E mouth are connected, control valve spool is in low order end under the effect of spring force, and A mouth and B mouth are connected, and flow piston small end and main pump oil outlet are connected all the time, large end is switched to fuel tank by E, D, B, A mouth, therefore flow piston moves to low order end, oil hydraulic pump pivot angle maximum, flow maximum.
The present invention can realize intersection, become the control object of power, and the power that has greatly improved oil hydraulic pump rationally uses, and has ensured effective utilization of power.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is step thrust piston structural representation of the present invention.
Embodiment
Referring to accompanying drawing, the plunger pump of the control of controlled type cross total output and change power, include meta energy-saving valve 3, constant power control valve 6, this pump duty plunger 13, meta energy-saving valve 3, in constant power control valve 6, be respectively equipped with spool 4, 7, the piston 2 of this pump duty plunger 13 arranges with the swash plate interlock of this pump 1, spool 4, 7 left end overhead has spring 5, 12, on the valve body of constant power control valve 6, have A mouth, B mouth, C mouth, on the valve body of meta energy-saving valve 3, have D mouth, E mouth, F mouth, A mouth is connected to fuel tank, B mouth is connected with D mouth, F mouth is connected with C mouth, C mouth is communicated with F mouth and is connected to main pump 1 and exports, on the piston 2 of this pump duty plunger 13, be fixed with shifting block 10, in shifting block 10, be combined with step thrust piston 8, the top of step thrust piston 8 is provided with protruding sphere 16, on protruding sphere 16, be hinged with bulb 14, the upper end of bulb 14 has piston shoes 15, the upper end rest of piston shoes 15 is on the lower end surface of right angle switch block 9, the cavity of establishing on step thrust piston 8 between two-stage step is communicated with high-pressure oil duct, high-pressure oil duct communicates with his pump, the one-level step that is positioned at below is communicated with inflow pipeline, inflow pipeline communicates with the left chamber of this pump duty plunger 13, the other end of right angle switch block 9 is pressed on the right-hand member of constant power control valve spool 6, the cavity of resorption of step thrust piston 8 is communicated in the left chamber of this pump duty plunger, the left chamber of this pump duty plunger is connected with the C mouth of constant power control valve, the right chamber of this pump duty plunger is connected with meta energy-saving valve E mouth, step thrust piston is provided with step, the cavity of step below is connected with his pump 17, the right side of right angle switch block 9 is provided with and becomes power plunger, become piston 11 overheads of power plunger in the right side of right angle switch block 9.
Working principle of the present invention is as follows:
When pump initialization, the spool 4 of meta energy-saving valve under the effect of spring 5 power in low order end, D mouth and E mouth are connected, control valve spool 7 is in low order end under the effect of spring 12 power, and A mouth and B mouth are connected, and flow piston 2 small ends and main pump oil outlet are connected all the time, large end is switched to fuel tank by E, D, B, A mouth, therefore flow piston moves to low order end, oil hydraulic pump pivot angle maximum, flow maximum.
1, realize permanent power control
Because pressure depends on load, along with induced pressure increases, main pump outlet pressure increases, step thrust piston 8 acts on right angle switch block 9 thrust upwards and increases, promoting right angle switch block 9 is rotated counterclockwise, control valve spool 7 is moved to left, A mouth and B mouth disconnect, B mouth and C mouth are connected, main pump hydraulic oil is through C, B, D, E mouth enters the large end of flow piston, because of power=pressure × area, the long-pending small end area that is greater than of large end face, pressure is identical, flow piston not etc. is not moving to left under power effect, drive thus swash plate pivot angle to reduce, pump duty reduces, be dynamically connected shifting block 10 and step thrust piston 8 of piston 2 band of this pump duty plunger 13 moves to left, the moment that step thrust piston 8 acts on lever reduces, controlling spool 7 moves to right, B mouth and A mouth, C mouth all disconnects, the large end fuel cut-off of flow piston, flow piston stops mobile, realizing thus pressure increases, flow reduces, according to (pressure × flow=steady state value), realize the object of permanent power control.
2, intersection total output control
Double step step thrust piston 8 of the present invention, what below step thrust piston, one-level step was connected is the pressure oil of another pump in duplex pump (rear pump), what one-level step was connected above is the pressure oil of this pump (front pump), introduce an oil circuit as an example of series connection double pump example at rear pump and access a step below step thrust piston 8 by front pump duty piston 2, shifting block 10, same front pump is also drawn the step thrust piston upper level step that an oil circuit leads to rear pump, and two pumps can be realized alternating power control thus.
3, meta is energy-conservation
In system, introduce meta energy-saving valve, when normal work, this meta energy-saving valve spool 4 under the effect of spring 5 power in low order end, D mouth and E mouth are connected, E mouth and F mouth disconnect, do not affect the alternating power control of double pump, but in the time giving an external control pressure P i(Pi and reach the pressure of setting), spool 4 moves to left and connects to E mouth and F mouth, and D mouth and E mouth disconnect, and this pump discharge pressure oil directly enters flow piston 2 and holds greatly, flow piston moves to left, drive swash plate pivot angle to reduce to minimum, be reduced to rapidly minimum thereby realize flow, thereby realize energy-conservation effect.
4, become power control
One of the increase in the right-hand member novelty of right angle switch block becomes power oil circuit control, when normal work, this oil circuit is inoperative, in the time that this oil circuit increases an external force Pf, be equivalent to offset a part of spring force of spring 12, this pump or its pump need less pressure just can in above-mentioned 1 permanent power adjustments, promote right angle switch block 9 by front pump duty piston 2, can change thus rising of pump and adjust point, realize and become power control.
Claims (2)
1. the plunger pump of the control of controlled type cross total output and change power, include meta energy-saving valve, constant power control valve, this pump duty plunger, meta energy-saving valve, in constant power control valve, be respectively equipped with spool, the swash plate interlock of the piston of this pump duty plunger and this pump arranges, it is characterized in that: the left end overhead of described spool has spring, on the valve body of constant power control valve, have A mouth, B mouth, C mouth, on the valve body of meta energy-saving valve, have D mouth, E mouth, F mouth, A mouth is connected to fuel tank, B mouth is connected with D mouth, F mouth is connected with C mouth, C mouth is communicated with F mouth and is connected to main pump outlet, on the piston of this pump duty plunger, be fixed with shifting block, in shifting block, be combined with step thrust piston, the top of step thrust piston is provided with protruding sphere, on protruding sphere, be hinged with bulb, the upper end of bulb has piston shoes, the upper end rest of piston shoes is on the lower end surface of right angle switch block, the other end of right angle switch block is pressed on the right-hand member of constant power control valve spool, the cavity of resorption of step thrust piston is communicated in the left chamber of this pump duty plunger, the left chamber of this pump duty plunger is connected with the C mouth of constant power control valve, and the right chamber of this pump duty plunger is connected with meta energy-saving valve E mouth,
The cavity of establishing between two-stage step on described step thrust piston is communicated with high-pressure oil duct, and high-pressure oil duct communicates with his pump, and the one-level step that is positioned at below is communicated with inflow pipeline, and inflow pipeline communicates with the left chamber of this pump duty plunger.
2. the plunger pump of controlled type cross total output according to claim 1 control and change power, is characterized in that: the right side of described right angle switch block is provided with and becomes power plunger, and the piston top that becomes power plunger is placed in the right side of right angle switch block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303045.2A CN102330667B (en) | 2011-10-10 | 2011-10-10 | Plunger pump with self-controlled type cross total power control and variable power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303045.2A CN102330667B (en) | 2011-10-10 | 2011-10-10 | Plunger pump with self-controlled type cross total power control and variable power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102330667A CN102330667A (en) | 2012-01-25 |
| CN102330667B true CN102330667B (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110303045.2A Expired - Fee Related CN102330667B (en) | 2011-10-10 | 2011-10-10 | Plunger pump with self-controlled type cross total power control and variable power |
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| Country | Link |
|---|---|
| CN (1) | CN102330667B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779649B (en) * | 2020-06-30 | 2022-10-28 | 潍柴动力股份有限公司 | Variable power control device and hydraulic system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0840008A1 (en) * | 1994-12-09 | 1998-05-06 | Komatsu Ltd. | Control device for a variable displacement hydraulic pump |
| CN101270742A (en) * | 2008-04-29 | 2008-09-24 | 杨徐辉 | Constant power stand-to automatic control axial plunger pump |
| CN201461362U (en) * | 2009-05-05 | 2010-05-12 | 上海电气液压气动有限公司 | Variable control mechanism of plunger piston variable pump |
| EP2366901A2 (en) * | 2010-03-08 | 2011-09-21 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| CN202300968U (en) * | 2011-10-10 | 2012-07-04 | 安徽博一流体传动股份有限公司 | Self-control cross total power control and variable power plunger pump |
-
2011
- 2011-10-10 CN CN201110303045.2A patent/CN102330667B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0840008A1 (en) * | 1994-12-09 | 1998-05-06 | Komatsu Ltd. | Control device for a variable displacement hydraulic pump |
| CN101270742A (en) * | 2008-04-29 | 2008-09-24 | 杨徐辉 | Constant power stand-to automatic control axial plunger pump |
| CN201461362U (en) * | 2009-05-05 | 2010-05-12 | 上海电气液压气动有限公司 | Variable control mechanism of plunger piston variable pump |
| EP2366901A2 (en) * | 2010-03-08 | 2011-09-21 | Kabushiki Kaisha Toyota Jidoshokki | Variable displacement compressor |
| CN202300968U (en) * | 2011-10-10 | 2012-07-04 | 安徽博一流体传动股份有限公司 | Self-control cross total power control and variable power plunger pump |
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| Publication number | Publication date |
|---|---|
| CN102330667A (en) | 2012-01-25 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |
Denomination of invention: Plunger pump with self-controlled type cross total power control and variable power Effective date of registration: 20170922 Granted publication date: 20140910 Pledgee: Hefei Xingtai financing guarantee Group Ltd. Pledgor: ANHUI BOYI FLUID POWER TRANSMISSION JOINT STOCK Co.,Ltd. Registration number: 2017340000244 |
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| PE01 | Entry into force 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: 20140910 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |