CN201096113Y - Pilot hydraulic system with engineering machinery possessing pilot oil supply valve - Google Patents
Pilot hydraulic system with engineering machinery possessing pilot oil supply valve Download PDFInfo
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- CN201096113Y CN201096113Y CNU2007200812813U CN200720081281U CN201096113Y CN 201096113 Y CN201096113 Y CN 201096113Y CN U2007200812813 U CNU2007200812813 U CN U2007200812813U CN 200720081281 U CN200720081281 U CN 200720081281U CN 201096113 Y CN201096113 Y CN 201096113Y
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- oil
- pilot
- guide
- oil outlet
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Abstract
The utility model discloses a novel pilot hydraulic system of a pilot oil feed valve on engineering machinery, and the system comprises the pilot oil feed valve connected with other shared pump resources. The oil outlet of the pilot oil feed valve is connected with the oil outlet of the pilot oil feed valve; the pilot oil feed valve comprises a P1 oil inlet connected with the oil outlet of a shared pump resource, a P2 oil inlet connected with the oil outlet of the shared pump resource, a first stage shuttle valve, a second stage shuttle valve, a reducing valve, a spillover valve, a check valve, an electromagnetic lockup valve and a PR oil outlet. Because the pilot hydraulic system fully utilizes the existing working pumps, steering pumps or other shared pump resources on an engineering machine to feed oil for a pilot system, and additionally adding a pump does not need; the oil consumption amount of the pilot system is small without influencing on the working of other systems, thus the number of pumps is reduced, the cost of elements is lowered, and the connecting pipelines are simplified.
Description
Technical field
The utility model relates to loader, grader or the Other Engineering guide's hydraulic system that comprises guide's delivery valve mechanically.
Background technique
In engineering machinery, for the working pump of hydraulic system of working work and the oil pressure that provided for the steering pump or the other system pumping source of steering hydraulic system work have generally all surpassed 10Mpa, the oil pressure fitness for purpose of guide's hydraulic system is 3 to 3.5Mpa.At present, engineering machinery such as domestic high end loader are in order to satisfy Europe three emission requests, need pumping source quantity more, increase a pump separately and need the extra pumping source that increases for guide's hydraulic work system, increased cost, if adopt original working pump or steering pump or other system pumping source DFF Direct Fuel Feed,, can influence the other system proper functioning owing to reasons such as pilot system pressure are low.
Summary of the invention
It is guide's hydraulic system fuel feeding that the utility model is intended to propose a kind of work on hand pump, steering pump or other pumping sources that can make full use of on the engineering machinery, and oil pressure can satisfy guide's hydraulic system that the requirement of guide's hydraulic system does not influence the proper functioning of shared hydraulic system again, adopt the utility model not need additionally to increase guide's hydraulic system pump, reduced the element cost.
For solving the problems of the technologies described above, the utility model has adopted following technological scheme:
A kind of novel guide's hydraulic system of engineering machinery band guide delivery valve is characterized in that: comprise the guide's delivery valve that connects with working pump, steering pump or other shared pumping sources, the oil outlet of guide's delivery valve connects with the pilot valve filler opening; Described guide's delivery valve comprises the P1 filler opening that is connected with working pump or other shared pumping source oil outlets, the P2 filler opening that is connected with steering pump or other shared pumping source oil outlets, notes P1, P2 mouth can connect simultaneously, can only use one of them hydraulic fluid port, and another is blocked need not, first order shuttle valve, second level shuttle valve, reduction valve, relief valve, one-way valve, electromagnetism lock valve and PR oil outlet; The hydraulic oil of coming in through P1 filler opening or P2 filler opening flows into second level shuttle valve through first order shuttle valve, described first order shuttle valve and the series connection of second level shuttle valve, described second level shuttle valve is in series with reduction valve, the oil outlet parallel connection of the oil outlet of described reduction valve, the filler opening of relief valve and one-way valve; Be connected with electromagnetism lock valve and the accumulator that is positioned at guide's delivery valve outside on the described one-way valve side by side; Described electromagnetism lock valve connects with described pilot valve filler opening through the PR oil outlet.
The T return opening of the oil return that described shuttle valve, reduction valve, relief valve, one-way valve and electromagnetism lock valve are produced through being connected with described relief valve connects external fuel tank.
The adjusting pressure of described reduction valve is 3 to 3.5Mpa.
The adjusting pressure of described relief valve is 4.5Mpa.
Working principle of the present utility model is as follows:
The pumping source shared with other hydraulic systems, hydraulic oil such as working pump and steering pump etc. enters shuttle valve through P1 filler opening or P2 filler opening, after the reduction valve of the flowing through decompression, pressure falls about about 3.5Mpa, and reduction valve is fuel-displaced to enter accumulator and electromagnetism lock valve through one-way valve; When hydraulic system of working is not worked, electromagnetism lock valve no electric circuit, pilot valve does not have pressure oil and enters, and can prevent the dangerous accident that misoperation guide handle causes like this; During hydraulic system of working work, the energising of electromagnetism lock valve, pumping source comes shuttle valve, reduction valve, the one-way valve of oil through guide's delivery valve, enter the PR oil outlet through the electromagnetism lock valve again, input to the pilot valve filler opening, at this moment pull guide's handle, hydraulic system of working begins action.
Advantage of the present utility model is:
1, because work on hand pump, steering pump that the utility model makes full use of on the engineering machinery are guide's hydraulic system fuel feeding, do not need additionally to increase a pump, guide's hydraulic system is very little with oil mass, and do not influence other system work, thereby reduced the quantity of pump, reduce the element cost, simplified connecting pipeline.
2, the withstand voltage height of guide's delivery valve, built-in reduction valve also can use when shared working pump, steering pump or other pump outlet pressures are higher than 3.5Mpa; And when the drain pressing system was not worked in the ban, the guide oil roadbed is consumed flow not originally.
3, integrated electromagnetism lock valve by automatically controlled, can prevent that misoperation guide handle from causing safety problem, satisfies the CE requirement.
Description of drawings
Fig. 1 is a structural principle skeleton diagram of the present utility model
Embodiment
A kind of novel guide's hydraulic system of engineering machinery band guide delivery valve comprises the guide's delivery valve 3 that connects with working pump 1, steering pump 2 or other shared pumping sources, and the oil outlet of guide's delivery valve 3 connects with pilot valve 4; Described guide's delivery valve 3 comprises the P1 filler opening 5 that is connected with working pump 1 or other shared pumping source oil outlets, the P2 filler opening 6 that is connected with steering pump 2 or other shared pumping source oil outlets, notes P1, P2 mouth can connect simultaneously, can only use one of them hydraulic fluid port, and another is blocked need not, first order shuttle valve 7, second level shuttle valve 7, reduction valve 8, relief valve 9, one-way valve 10, electromagnetism lock valve 11 and PR oil outlet 12; The hydraulic oil of coming in through P1 filler opening 5 or P2 filler opening 6 flows into second level shuttle valves 7 through first order shuttle valve 7, described first order shuttle valve 7 and 7 series connection of second level shuttle valve, described second level shuttle valve 7 is in series with reduction valve 8, the filler opening of the oil outlet of described reduction valve 8, relief valve 9 and the oil outlet parallel connection of one-way valve 10; Be connected with electromagnetism lock valve 11 and the accumulator 15 that is positioned at guide's delivery valve 3 outsides on the described one-way valve 10 side by side; Described electromagnetism lock valve 11 connects with described pilot valve 4 through PR oil outlet 12.The T return opening 13 of the oil return that described shuttle valve 7, reduction valve 8, relief valve 9, one-way valve 10 and electromagnetism lock valve 11 are produced through being connected with described relief valve 9 connects external fuel tank 14.The adjusting pressure of described reduction valve 8 is 3.5Mpa.The adjusting pressure of described relief valve 9 is 4.5Mpa.
Working principle of the present utility model is as follows:
The pumping source shared with other hydraulic systems, hydraulic oil such as working pump 1 and steering pump 2 etc. enters shuttle valve 7 through P1 filler opening 5 or P2 filler opening 6, flow through after reduction valve 8 decompression, pressure falls about about 3.5Mpa, and reduction valve 8 is fuel-displaced to enter accumulator 15 and electromagnetism lock valve 11 through one-way valve 10; When hydraulic system of working is not worked, electromagnetism lock valve 11 no electric circuits, pilot valve 4 no pressure oils enter, and can prevent the dangerous accident that misoperation guide handle causes like this; During hydraulic system of working work, 11 energisings of electromagnetism lock valve, pumping source comes shuttle valve 7, reduction valve 8, the one-way valve 10 of oil through guide's delivery valve 3, enter PR oil outlet 12 through electromagnetism lock valve 11 again, input to pilot valve 4 filler openings, at this moment pull guide's handle, hydraulic system of working begins action.
The adjusting pressure of described reduction valve 8 is 3Mpa.
Claims (4)
1, a kind of novel guide's hydraulic system of engineering machinery band guide delivery valve is characterized in that: comprise the guide's delivery valve (3) that connects with working pump (1) and steering pump (2), the oil outlet of guide's delivery valve (3) connects with pilot valve (4); Described guide's delivery valve (3) comprises the P1 filler opening (5) that is connected with working pump (1) oil outlet, the P2 filler opening (6) that is connected with steering pump (2) oil outlet, first order shuttle valve (7), second level shuttle valve (7), reduction valve (8), relief valve (9), one-way valve (10), electromagnetism lock valve (11) and PR oil outlet (12); Through P1 filler opening (5), the hydraulic oil that P2 filler opening (6) is come in flows into second level shuttle valve (7) through first order shuttle valve (7), described first order shuttle valve (7) and second level shuttle valve (7) series connection, described second level shuttle valve (7) is in series with reduction valve (8), the filler opening of the oil outlet of described reduction valve (8), relief valve (9) and the oil outlet parallel connection of one-way valve (10); Be connected with electromagnetism lock valve (11) on the described one-way valve (10) side by side and be positioned at the outside accumulator (15) of guide's delivery valve (3); Described electromagnetism lock valve (11) connects with described pilot valve (4) through PR oil outlet (12).
2, novel guide's hydraulic system of engineering machinery band guide delivery valve according to claim 1 is characterized in that: the T return opening (13) of the oil return that described shuttle valve (7), reduction valve (8), relief valve (9), one-way valve (10) and electromagnetism lock valve (11) are produced through being connected with described relief valve (9) connects external fuel tank (14).
3, novel guide's hydraulic system of engineering machinery band guide delivery valve according to claim 1 and 2 is characterized in that: the adjusting pressure of described reduction valve (8) is 3 to 3.5Mpa.
4, novel guide's hydraulic system of engineering machinery band guide delivery valve according to claim 1 and 2, it is characterized in that: the adjusting pressure of described relief valve (9) is 4.5Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200812813U CN201096113Y (en) | 2007-09-28 | 2007-09-28 | Pilot hydraulic system with engineering machinery possessing pilot oil supply valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200812813U CN201096113Y (en) | 2007-09-28 | 2007-09-28 | Pilot hydraulic system with engineering machinery possessing pilot oil supply valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096113Y true CN201096113Y (en) | 2008-08-06 |
Family
ID=39923166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200812813U Expired - Fee Related CN201096113Y (en) | 2007-09-28 | 2007-09-28 | Pilot hydraulic system with engineering machinery possessing pilot oil supply valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096113Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804782A (en) * | 2010-03-24 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Novel hydraulic system of drive axle cooling system |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN102359133A (en) * | 2011-09-27 | 2012-02-22 | 山推工程机械股份有限公司 | Hydraulic system of bulldozer |
| CN103562465A (en) * | 2012-05-28 | 2014-02-05 | 株式会社小松制作所 | Industrial vehicle and control method for industrial vehicle |
| CN103727078A (en) * | 2014-01-03 | 2014-04-16 | 徐州重型机械有限公司 | Crane and hydraulic system thereof |
| CN104265706A (en) * | 2014-09-19 | 2015-01-07 | 潍柴动力（青州）传控技术有限公司 | Relieving device of pilot control hydraulic system |
| CN113089763A (en) * | 2021-04-16 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Multi-stage safety handle control system and method for excavator |
-
2007
- 2007-09-28 CN CNU2007200812813U patent/CN201096113Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804782A (en) * | 2010-03-24 | 2010-08-18 | 四川成都成工工程机械股份有限公司 | Novel hydraulic system of drive axle cooling system |
| CN101804782B (en) * | 2010-03-24 | 2012-09-19 | 四川成都成工工程机械股份有限公司 | Novel hydraulic system of drive axle cooling system |
| CN102304934A (en) * | 2011-06-27 | 2012-01-04 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN102304934B (en) * | 2011-06-27 | 2015-07-15 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavator |
| CN102359133A (en) * | 2011-09-27 | 2012-02-22 | 山推工程机械股份有限公司 | Hydraulic system of bulldozer |
| CN103562465A (en) * | 2012-05-28 | 2014-02-05 | 株式会社小松制作所 | Industrial vehicle and control method for industrial vehicle |
| CN103562465B (en) * | 2012-05-28 | 2015-06-03 | 株式会社小松制作所 | Industrial vehicle and control method for industrial vehicle |
| CN103727078A (en) * | 2014-01-03 | 2014-04-16 | 徐州重型机械有限公司 | Crane and hydraulic system thereof |
| CN103727078B (en) * | 2014-01-03 | 2017-05-24 | 徐州重型机械有限公司 | Crane and hydraulic system thereof |
| CN104265706A (en) * | 2014-09-19 | 2015-01-07 | 潍柴动力（青州）传控技术有限公司 | Relieving device of pilot control hydraulic system |
| CN113089763A (en) * | 2021-04-16 | 2021-07-09 | 徐州徐工挖掘机械有限公司 | Multi-stage safety handle control system and method for excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20130928 |