CN103075377A - Hydraulic pump with pressure selecting valve - Google Patents
Hydraulic pump with pressure selecting valve Download PDFInfo
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- CN103075377A CN103075377A CN2013100333556A CN201310033355A CN103075377A CN 103075377 A CN103075377 A CN 103075377A CN 2013100333556 A CN2013100333556 A CN 2013100333556A CN 201310033355 A CN201310033355 A CN 201310033355A CN 103075377 A CN103075377 A CN 103075377A
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- oil
- hydraulic pump
- pressure
- valve
- oil hydraulic
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Abstract
The invention discloses a hydraulic pump with a pressure selecting valve. The hydraulic pump comprises a hydraulic pump main body and a pressure selecting valve, wherein the pressure selecting valve is integrally assembled in a rear casing (1) of the hydraulic pump; a hydraulic pump high-pressure cavity (7) is communicated with an oil inlet cavity (10) of the pressure selecting valve through an oil access (8); an oil leakage cavity (11) of the pressure selecting valve is communicated with a hydraulic pump low-pressure cavity (13) through an oil return passage (12); and a boom cylinder main cavity is communicated with an external control oil port (14) of the pressure selecting valve, and an oil outlet (15) of the pressure selecting valve is communicated with an oil inlet cavity of the hydraulic pump. Thus, the hydraulic pump can provide oil source for two executing elements with different setting pressures; and the oil inlet situation of the pressure selecting valve has two paths of oil sources to be suitable for different working conditions. The hydraulic pump has the advantages of simplifying oil path, reducing pipeline connection, saving space, reducing power consumption, reducing using cost, and being beneficial to energy conservation and emission reduction.
Description
Technical field
The invention belongs to the oil hydraulic pump that construction machinery hydraulic system uses.Be particularly related to a kind of oil hydraulic pump with the pressure selector valve.
Background technique
In the prior art, the hydraulic system of the loader in the engineering machinery, the different executive component of pressure setting needs different oil hydraulic pumps that oil sources is provided generally speaking, mostly has two pumps of high pressure and low pressure or duplicate gear oil pump.Realize an oil hydraulic pump simultaneously for two different executive components of pressure setting provide oil sources, must be situated between increases the design of control, and pipeline is complicated like this, and trouble is installed, and cost is high.In order to solve the problems such as duplex pump manufacturing cost height and complicated hydraulic loop, goal of the invention of the present invention has been proposed.
Summary of the invention
Goal of the invention of the present invention is for the manufacturing cost that overcomes duplex pump is high, and the problems such as the complicated Installation and Debugging trouble of the oil hydraulic circuit of single pump put forward.Realize that an oil hydraulic pump simultaneously for two different executive components of pressure setting provide oil sources, namely provides a kind of oil hydraulic pump with the pressure selector valve.
Technical solution of the present invention is: this comprises hydraulic pump main body and pressure selection valve with the oil hydraulic pump of pressure selector valve, and pressure selection valve is integrated to be assemblied in the oil hydraulic pump rear case (1).Pressure selection valve is comprised of the joint (2), spool (3), spring (4), adjustment pad (5), the plug (6) that are assemblied in the oil hydraulic pump rear case (1).Oil hydraulic pump hyperbaric chamber (7) is communicated with pressure selection valve oil suction chamber (10) by oil input channel (8), and pressure selection valve draining chamber (11) is communicated with oil hydraulic pump low-pressure cavity (13) by back oil road (12); The large chamber of boom cylinder is communicated with pressure selection valve external control hydraulic fluid port (14), and pressure selection valve oil outlet (15) is communicated with the pilot valve oil suction chamber; Oil hydraulic pump hyperbaric chamber (7) output high pressure fuel source, pressure selection valve oil outlet (15) output low pressure oil sources.The oil-feed of pressure selection valve provides respectively oil sources by oil hydraulic pump oil input channel (8) and pressure selection valve external control hydraulic fluid port (14).Oil hydraulic pump can be simultaneously for two different executive components of pressure setting provide oil sources like this, and the simultaneously oil-feed of pressure selection valve has the two-way oil sources to select to be applicable to different operating modes.
Useful technique effect of the present invention is: the hydraulic system of having simplified engineering machinery, particularly use a high pressure gear oil pump, can realize the function of duplex pump, install simple and reliable, reducing pipeline connects, conserve space reduces power consumpiton and reduces simultaneously manufacturing cost and use cost, is beneficial to energy-saving and emission-reduction.
Description of drawings
Accompanying drawing 1 is main structure schematic representation of the present invention, and accompanying drawing 2 is A-A sectional views of accompanying drawing 1, and accompanying drawing 3 is B-B sectional views of accompanying drawing 2.
In the accompanying drawing: 1, oil hydraulic pump rear case, 2, joint, 3, spool, 4, spring, 5, adjust pad, 6, plug, 7, oil hydraulic pump hyperbaric chamber, 8, oil input channel, 9, one-way valve, 10, pressure selection valve oil suction chamber, 11, pressure selection valve draining chamber, 12, back oil road, 13, the oil hydraulic pump low-pressure cavity, 14, pressure selection valve external control hydraulic fluid port, 15, the pressure selection valve oil outlet.
Embodiment
Below in conjunction with the embodiment who provides in the accompanying drawing, structure of the present invention and use are elaborated.With reference to accompanying drawing, this kind comprises hydraulic pump main body and pressure selection valve with the oil hydraulic pump of pressure selector valve, and pressure selection valve is integrated to be assemblied in the oil hydraulic pump rear case (1).It is characterized in that oil hydraulic pump hyperbaric chamber (7) is communicated with pressure selection valve oil suction chamber (10) by oil input channel (8), pressure selection valve draining chamber (11) is communicated with oil hydraulic pump low-pressure cavity (13) by back oil road (12); Pressure selection valve external control hydraulic fluid port (14) is communicated with the large chamber of boom cylinder, and pressure selection valve oil outlet (15) is communicated with the pilot valve oil suction chamber.It is the pressure oil of pressure selection valve oil outlet (15) output connects pilot valve again by oil pipe filler opening.Said oil hydraulic pump hyperbaric chamber (7) output high pressure fuel source, pressure selection valve oil outlet (15) output low pressure oil sources.The oil-feed of said pressure selection valve provides respectively oil sources by oil hydraulic pump oil input channel (8) and pressure selection valve external control hydraulic fluid port (14).Oil hydraulic pump can be simultaneously for two different executive components of pressure setting provide oil sources like this, and the simultaneously oil-feed of pressure selection valve has the two-way oil sources to select to be applicable to different operating modes.
Oil hydraulic pump is when realization provides high pressure fuel source to main system, the high pressure oil of oil hydraulic pump hyperbaric chamber (7) by oil input channel (8), one-way valve (9) and after spool (3) decompression as the control oil sources of pilot valve, its delivery pressure can be stabilized in the needed pressure range of pilot valve.The leakage oil that produces between spool (3) and valve opening Spielpassung flows back to oil hydraulic pump low-pressure cavity (13) by draining chamber (11), back oil road (12).When the hydraulic pressure air pump inoperative, the large chamber of boom cylinder provides by pressure selection valve external control hydraulic fluid port (14) and makes pilot valve control main valve reach the power oil sources that equipment steadily lands.
When the loader engine work, oil hydraulic pump provides oil sources by oil input channel (8) to pilot valve, when sudden engine stops working, if loading shovel does not also steadily land, at this moment must rely on the large chamber of boom cylinder to provide oil sources by external control hydraulic fluid port (14) to pilot valve because of the pressure oil-source that deadweight produces.
Claims (6)
1. the oil hydraulic pump with the pressure selector valve comprises oil hydraulic pump and pressure selection valve, it is characterized in that pressure selection valve is assemblied in the oil hydraulic pump rear case (1).
2. according to a kind of oil hydraulic pump with the pressure selector valve claimed in claim 1, it is characterized in that said pressure selection valve is comprised of the joint (2), spool (3), spring (4), adjustment pad (5), the plug (6) that are assemblied in the oil hydraulic pump rear case (1).
3. according to claim 1 or 2 described a kind of oil hydraulic pumps with the pressure selector valve, it is characterized in that being that said oil hydraulic pump hyperbaric chamber (7) is communicated with pressure selection valve oil suction chamber (10) by oil input channel (8), one-way valve (9), pressure selection valve draining chamber (11) is communicated with oil hydraulic pump low-pressure cavity (13) by back oil road (12).
4. according to claim 1 or 2 described a kind of oil hydraulic pumps with the pressure selector valve, it is characterized in that the large chamber of boom cylinder is communicated with pressure selection valve external control hydraulic fluid port (14), pressure selection valve oil outlet (15) is communicated with the pilot valve oil suction chamber.
5. according to claim 1 or 2 described a kind of oil hydraulic pumps with the pressure selector valve, it is characterized in that said oil hydraulic pump hyperbaric chamber (7) output high pressure fuel source, pressure selection valve oil outlet (15) output low pressure oil sources.
6. according to claim 1 or 2 described a kind of oil hydraulic pumps with the pressure selector valve, it is characterized in that saidly, it is characterized in that the oil-feed of said pressure selection valve provides respectively oil sources by oil hydraulic pump oil input channel (8) and pressure selection valve external control hydraulic fluid port (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100333556A CN103075377A (en) | 2013-01-29 | 2013-01-29 | Hydraulic pump with pressure selecting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100333556A CN103075377A (en) | 2013-01-29 | 2013-01-29 | Hydraulic pump with pressure selecting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103075377A true CN103075377A (en) | 2013-05-01 |
Family
ID=48152027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100333556A Pending CN103075377A (en) | 2013-01-29 | 2013-01-29 | Hydraulic pump with pressure selecting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103075377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525641A (en) * | 2016-01-25 | 2016-04-27 | 徐州徐工特种工程机械有限公司 | Movable arm dropping hydraulic system used for skid steer loader in case of flameout |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20109689U1 (en) * | 2001-06-13 | 2001-09-27 | Dams Gmbh | Valve |
| CN2789462Y (en) * | 2005-05-13 | 2006-06-21 | 陈帮勇 | Gear oil pump |
| CN201187493Y (en) * | 2008-02-18 | 2009-01-28 | 唐耿 | Single-pump double-velocity oil way |
| CN101929459A (en) * | 2010-08-24 | 2010-12-29 | 全兴精工集团有限公司 | Automobile hydraulic power steering blade pump |
| CN201884280U (en) * | 2010-06-04 | 2011-06-29 | 姜立坤 | Assembling unit of hydraulic pump (gear pump or vane pump) and pressure control valve |
| CN202031832U (en) * | 2011-05-03 | 2011-11-09 | 潍柴动力股份有限公司 | Steering gear pump |
| CN203098276U (en) * | 2013-01-29 | 2013-07-31 | 潍柴动力（青州）传控技术有限公司 | Hydraulic pump with pressure selection valve |
-
2013
- 2013-01-29 CN CN2013100333556A patent/CN103075377A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20109689U1 (en) * | 2001-06-13 | 2001-09-27 | Dams Gmbh | Valve |
| CN2789462Y (en) * | 2005-05-13 | 2006-06-21 | 陈帮勇 | Gear oil pump |
| CN201187493Y (en) * | 2008-02-18 | 2009-01-28 | 唐耿 | Single-pump double-velocity oil way |
| CN201884280U (en) * | 2010-06-04 | 2011-06-29 | 姜立坤 | Assembling unit of hydraulic pump (gear pump or vane pump) and pressure control valve |
| CN101929459A (en) * | 2010-08-24 | 2010-12-29 | 全兴精工集团有限公司 | Automobile hydraulic power steering blade pump |
| CN202031832U (en) * | 2011-05-03 | 2011-11-09 | 潍柴动力股份有限公司 | Steering gear pump |
| CN203098276U (en) * | 2013-01-29 | 2013-07-31 | 潍柴动力（青州）传控技术有限公司 | Hydraulic pump with pressure selection valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525641A (en) * | 2016-01-25 | 2016-04-27 | 徐州徐工特种工程机械有限公司 | Movable arm dropping hydraulic system used for skid steer loader in case of flameout |
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| PB01 | Publication | ||
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Application publication date: 20130501 |