CN103195124B - A kind of excavator return oil pressure control loop - Google Patents
A kind of excavator return oil pressure control loop Download PDFInfo
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- CN103195124B CN103195124B CN201310116555.8A CN201310116555A CN103195124B CN 103195124 B CN103195124 B CN 103195124B CN 201310116555 A CN201310116555 A CN 201310116555A CN 103195124 B CN103195124 B CN 103195124B
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- return
- valve
- solenoid operated
- operated directional
- pressure
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Abstract
The invention discloses a kind of excavator return oil pressure control loop, belong to engineering machinery return pressure control technology field.Comprise hydraulic oil container (5), radiator (7), counterbalance valve (8), rotary motor (9), electric control circuit and hydraulic control loop, electric control circuit comprises pressure switch (1), controller (2) and solenoid operated directional valve (3), hydraulic control loop comprises bypass valve (4) and return filter (6), pressure switch, controller and solenoid operated directional valve are connected, by fluid pressure line by solenoid operated directional valve and bypass valve parallel connection, the shunt circuit that solenoid operated directional valve and bypass valve are formed is in parallel with system oil return pipeline, is connected to hydraulic oil container by return filter.Compared with prior art; this excavator return oil pressure control loop makes return pressure control, within safe range value, accurately to control system oil return force value, the normal work of available protecting hydraulic system; extend working life, make excavator working stability reliable, reduce energy consumption.
Description
Technical field
The present invention relates to a kind of excavator return oil pressure control loop, belong to engineering machinery return pressure control technology field.
Background technology
Current excavator in the course of the work, return pressure often exceeds system and allows maximum pressure, causes the reason of this phenomenon to cause mainly due to the three kinds of pressure loss superpositions of the counterbalance valve pressure loss, the radiator pressure loss and the return filter pressure loss on oil return line.After return pressure exceeds the maximal pressure force value of permission, the problems such as the working life of rotary motor and oil return filter core reduces, radiator performance is impaired, system acting is abnormal can be caused, make return pressure lose increase simultaneously, energy consumption increases.At present for reducing return pressure value, bypass valve in parallel on oil return line, but bypass valve is proportional-type bypass valve, the oil return flow little then bypass valve pressure loss is low, when oil return flow is large, the bypass valve pressure loss is high, when oil return flow is large, return pressure value cannot be limited in certain safe range value by this bypass valve.
Summary of the invention
For above-mentioned prior art Problems existing; the invention provides a kind of excavator return oil pressure control loop; return pressure is made to control within certain safe range value; accurate control system return pressure value; the normal work of the parts such as available protecting rotary motor, oil return filter core, radiator; extend working life, so make excavator working stability reliable, reduce energy consumption.
To achieve these goals, the present invention includes hydraulic oil container, radiator, counterbalance valve, rotary motor, electric control circuit and hydraulic control loop, electric control circuit comprises switch, controller and solenoid operated directional valve, hydraulic control loop comprises bypass valve and return filter, and hydraulic oil container is connected with rotary motor by return filter, radiator, counterbalance valve.
The switch of electric control circuit is pressure switch, this pressure switch is arranged on the benefit oil port of rotary motor, pressure switch, controller and solenoid operated directional valve pass through circuit connected in series, bypass valve is in parallel with solenoid operated directional valve by fluid pressure line, the shunt circuit that solenoid operated directional valve and bypass valve are formed is in parallel with the radiator on system oil return pipeline and counterbalance valve, and the shunt circuit that this solenoid operated directional valve is formed with bypass valve is connected with hydraulic oil container by return filter.
Compared with prior art, this excavator return oil pressure control loop, control to detect the oil pressure that oil port mended by rotary motor by pressure switch, in parallel with the radiator on system oil return pipeline and counterbalance valve through the shunt circuit that solenoid operated directional valve and bypass valve are formed again, hydraulic oil container is connected to finally by return filter, return pressure is made to control within certain safe range value, accurately control system oil return force value, available protecting rotary motor, oil return filter core, the normal work of the parts such as radiator, extend working life, and then make excavator working stability reliable, reduce energy consumption.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention.
In figure: 1, pressure switch, 2, controller, 3, solenoid operated directional valve, 4, bypass valve, 5, hydraulic oil container, 6, return filter, 7, radiator, 8, counterbalance valve, 9, rotary motor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, this excavator return oil pressure control loop comprises hydraulic oil container 5, radiator 7, counterbalance valve 8, rotary motor 9, electric control circuit and hydraulic control loop, electric control circuit comprises switch 1, controller 2 and solenoid operated directional valve 3, hydraulic control loop comprises bypass valve 4 and return filter 6, and hydraulic oil container 5 is connected with rotary motor 9 by return filter 6, radiator 7, counterbalance valve 8.
The switch 1 of electric control circuit is pressure switch, this pressure switch 1 is arranged on the benefit oil port of rotary motor 9, pressure switch 1, controller 2 and solenoid operated directional valve 3 pass through circuit connected in series, bypass valve 4 is in parallel with solenoid operated directional valve 3 by fluid pressure line, the shunt circuit that solenoid operated directional valve 3 and bypass valve 4 are formed is in parallel with the radiator 7 on system oil return pipeline and counterbalance valve 8, and the shunt circuit that this solenoid operated directional valve 3 is formed with bypass valve 4 is connected with hydraulic oil container 5 by return filter 6.
At rotary motor 9 repairing mouth setting pressure switch 1, control to detect the oil pressure that oil port mended by rotary motor 9 by pressure switch 1, the maximal pressure force value allowed due to the repairing road of rotary motor 9 is 10bar, more than the application life greatly reducing rotary motor 9 during 10bar, so the connection value of pressure switch 1 is set as 10bar.When return pressure is more than 10bar, pressure switch 1 is connected, the signal of telecommunication is delivered to controller 2 by circuit, after controller 2 receives the signal of telecommunication of pressure switch 1, the circuit ON of solenoid operated directional valve 3 will be led to, electromagnet Y1 on solenoid operated directional valve 3 obtain electric after, the action of solenoid operated directional valve 3 spool is promoted by electromagnetic force, oil circuit moment opens completely, fluid can enter after return filter 6 through solenoid operated directional valve 3, enter hydraulic oil container 5 again, avoid the return pressure loss that hydraulic oil causes on radiator 7 and counterbalance valve 8, return pressure is reduced; When return pressure drops to after lower than pressure switch 1 setting pressure 10bar, pressure switch 1 power-off, the circuit controlling solenoid operated directional valve 3 in controller 2 disconnects, after electromagnet Y1 power-off, solenoid operated directional valve 3 relies on spring pressure to make spool action, return to off-state, cut-off through the loop of solenoid operated directional valve 3, oil return gets back to hydraulic oil container 5 after return filter 6, radiator 7 and counterbalance valve 8.
Claims (1)
1. an excavator return oil pressure control loop, comprise hydraulic oil container (5), radiator (7), counterbalance valve (8), rotary motor (9), electric control circuit and hydraulic control loop, electric control circuit comprises switch (1), controller (2) and solenoid operated directional valve (3), hydraulic control loop comprises bypass valve (4) and return filter (6), and hydraulic oil container (5) is connected with rotary motor (9) by return filter (6), radiator (7), counterbalance valve (8);
It is characterized in that, the switch (1) of described electric control circuit is pressure switch, this pressure switch (1) is arranged on the benefit oil port of rotary motor (9), described pressure switch (1), controller (2) and solenoid operated directional valve (3) pass through circuit connected in series, described bypass valve (4) is in parallel with solenoid operated directional valve (3) by fluid pressure line, the shunt circuit that described solenoid operated directional valve (3) and bypass valve (4) are formed is in parallel with the radiator (7) on system oil return pipeline and counterbalance valve (8), the shunt circuit that this solenoid operated directional valve (3) and bypass valve (4) are formed is connected with hydraulic oil container (5) by return filter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116555.8A CN103195124B (en) | 2013-04-03 | 2013-04-03 | A kind of excavator return oil pressure control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116555.8A CN103195124B (en) | 2013-04-03 | 2013-04-03 | A kind of excavator return oil pressure control loop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195124A CN103195124A (en) | 2013-07-10 |
| CN103195124B true CN103195124B (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310116555.8A Active CN103195124B (en) | 2013-04-03 | 2013-04-03 | A kind of excavator return oil pressure control loop |
Country Status (1)
| Country | Link |
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| CN (1) | CN103195124B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541395B (en) * | 2013-09-26 | 2016-04-13 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic excavator energy-conservation control system |
| CN105862962B (en) * | 2016-05-31 | 2018-05-18 | 青岛雷沃工程机械有限公司 | Reduce the hydraulic circuit of return oil pressure |
| CN108591186A (en) * | 2018-05-04 | 2018-09-28 | 徐州徐工矿山机械有限公司 | A kind of large-tonnage excavator fluid temperature elevation system and control method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5042471B2 (en) * | 2005-06-30 | 2012-10-03 | コベルコ建機株式会社 | Hydraulic control equipment for construction machinery |
| JP2007333017A (en) * | 2006-06-13 | 2007-12-27 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Energy saving device of construction machine |
| JP2010047984A (en) * | 2008-08-21 | 2010-03-04 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic circuit of hydraulic excavator |
| CN101775822B (en) * | 2009-12-31 | 2011-12-07 | 福田雷沃国际重工股份有限公司 | Excavator swing arm descending hydraulic control loop |
| CN102251547B (en) * | 2011-06-14 | 2013-04-24 | 三一重机有限公司 | Pilot control system of novel hydraulic excavator |
| CN202118032U (en) * | 2011-06-23 | 2012-01-18 | 徐州徐工挖掘机械有限公司 | Novel excavator oil return device |
| CN102418354B (en) * | 2011-10-28 | 2013-09-18 | 华侨大学 | Pump/motor-based parallel-series hybrid hydraulic excavator driving system |
| CN102535575A (en) * | 2012-02-03 | 2012-07-04 | 山重建机(济宁)有限公司 | Hydraulic control energy-saving device of crawler-type hydraulic digging machine |
| CN203188272U (en) * | 2013-04-03 | 2013-09-11 | 徐州徐工挖掘机械有限公司 | Excavator oil return pressure control loop |
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2013
- 2013-04-03 CN CN201310116555.8A patent/CN103195124B/en active Active
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| CN103195124A (en) | 2013-07-10 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zong Inventor after: Zhang Hong Inventor after: Jin Yuefeng Inventor after: Qin Jiasheng Inventor after: Fei Shuhui Inventor after: Wang Qu Inventor after: Shi Lijing Inventor after: Zhao Yu Inventor before: Jin Yuefeng Inventor before: Qin Jiasheng Inventor before: Fei Shuhui Inventor before: Wang Qu Inventor before: Shi Lijing Inventor before: Zhao Yu |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: JIN YUEFENG QIN JIASHENG FEI SHUHUI WANG QU SHI LIJING ZHAO YU TO: LI ZONGZHANG HONG JIN YUEFENG QIN JIASHENG FEI SHUHUI WANG QU SHI LIJING ZHAO YU |
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| C14 | Grant of patent or utility model | ||
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