CN103195124A - Excavator return oil pressure control loop - Google Patents
Excavator return oil pressure control loop Download PDFInfo
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- CN103195124A CN103195124A CN2013101165558A CN201310116555A CN103195124A CN 103195124 A CN103195124 A CN 103195124A CN 2013101165558 A CN2013101165558 A CN 2013101165558A CN 201310116555 A CN201310116555 A CN 201310116555A CN 103195124 A CN103195124 A CN 103195124A
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- control loop
- valve
- return oil
- hydraulic
- return
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- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an excavator return oil pressure control loop and belongs to the technical field of engineering machinery return oil pressure control. The excavator return oil pressure control loop comprises a hydraulic oil tank (5), a radiator (7), a counterbalance valve (8), a rotary motor (9), an electronic control loop and a hydraulic control loop. The electronic control loop comprises a pressure switch (1), a controller (2) and an electromagnetic directional valve (3). The hydraulic control loop comprises a bypass valve (4) and a return oil filter (6). The pressure switch, the controller and the electromagnetic directional valve are connected in series, the electromagnetic directional valve and the bypass valve are connected in parallel through a hydraulic pipe, and a parallel connection loop formed by the electromagnetic directional valve and the bypass valve is in parallel connection with a system return oil pipe and is connected with the hydraulic oil tank through the return oil filter. Compared with the prior art, the excavator return oil pressure control loop enables return oil pressure to be controlled within safety range values, controls system return oil pressure values accurately, effectively protects normal operation of a hydraulic system, prolongs service life, enables an excavator to be operated stably and reliably, and reduces energy consumption.
Description
Technical field
The present invention relates to a kind of excavator return pressure control loop, belong to engineering machinery return pressure control technology field.
Background technology
Excavator in the course of the work at present, return pressure often exceeds system and allows maximum pressure, causes the reason of this phenomenon to cause mainly due to the counterbalance valve pressure loss, the radiator pressure loss and three kinds of pressure losses stacks of the return filter pressure loss on the oil return line.After return pressure exceeded the maximum pressure value of permission, problem such as can cause the working life of rotary motor and oil return filter core to reduce, radiator performance is impaired, system acting is unusual made that simultaneously the return pressure loss increases, energy consumption increases.At present for reducing the return pressure value, bypass valve in parallel on oil return line, but bypass valve is the proportional-type bypass valve, the little then bypass valve of the oil return flow pressure loss is low, the bypass valve pressure loss height when oil return flow is big, when the oil return flow was big, this bypass valve can't be limited to the return pressure value in certain safe range value.
Summary of the invention
Problem at above-mentioned prior art existence; the invention provides a kind of excavator return pressure control loop; make return pressure control within certain safe range value; accurate control system return pressure value; effectively protect the operate as normal of parts such as rotary motor, oil return filter core, radiator; prolong working life, so make the 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, the 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 installed in the benefit oil port of rotary motor, pressure switch, controller and solenoid operated directional valve are connected by circuit, 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 constitute is in parallel with radiator and counterbalance valve on the system oil return pipeline, and this solenoid operated directional valve is connected with hydraulic oil container by return filter with the shunt circuit that bypass valve constitutes.
Compared with prior art; this excavator return pressure control loop; detect the oil pressure that rotary motor is mended oil port by pressure switch control; in parallel with radiator and counterbalance valve on the system oil return pipeline through the shunt circuit of solenoid operated directional valve and bypass valve formation again; be connected to hydraulic oil container by return filter at last; make return pressure control within certain safe range value; accurately controlled the system oil return force value; effectively protected rotary motor; the oil return filter core; the operate as normal of parts such as radiator; prolonged working life, and then made the excavator working stability reliable; reduce energy consumption.
Description of drawings
Fig. 1 is control principle figure of the present invention.
Among the 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.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, this excavator return 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, the 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 installed in the benefit oil port of rotary motor 9, pressure switch 1, controller 2 and solenoid operated directional valve 3 are connected by circuit, 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 constitute is in parallel with radiator 7 and counterbalance valve 8 on the system oil return pipeline, and this solenoid operated directional valve 3 is connected with hydraulic oil container 5 by return filter 6 with the shunt circuit that bypass valve 4 constitutes.
At rotary motor 9 repairing mouth setting pressure switches 1, detect the oil pressure that rotary motor 9 is mended oil port by pressure switch 1 control, because the maximum pressure value that the repairing road of rotary motor 9 allows is 10bar, the application life that can reduce rotary motor 9 greatly when surpassing 10bar is so be set at 10bar with the connection value of pressure switch 1.When return pressure surpasses 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, to connect towards the circuit of solenoid operated directional valve 3, electromagnet Y1 on the solenoid operated directional valve 3 get electric after, promote the action of solenoid operated directional valve 3 spools by electromagnetic force, oil circuit moment opens fully, after fluid can enter return filter 6 through solenoid operated directional valve 3, enter hydraulic oil container 5 again, avoided hydraulic oil in the return pressure loss that radiator 7 and counterbalance valve 8 cause, return pressure is reduced; When return pressure drop to be lower than pressure switch 1 setting pressure 10bar after, pressure switch 1 outage, the circuit of control solenoid operated directional valve 3 disconnects in the controller 2, after the electromagnet Y1 outage, solenoid operated directional valve 3 relies on spring pressure to make the spool action, return to off-state, the loop of process solenoid operated directional valve 3 is cut off, and oil return is got back to hydraulic oil container 5 through behind return filter 6, radiator 7 and the counterbalance valve 8.
Claims (1)
1. excavator return 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), the 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 of described electric control circuit (1) is pressure switch, this pressure switch (1) is installed in the benefit oil port of rotary motor (9), described pressure switch (1), controller (2) and solenoid operated directional valve (3) are connected by circuit, 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) constitute is in parallel with radiator (7) and counterbalance valve (8) on the system oil return pipeline, and this solenoid operated directional valve (3) is connected with hydraulic oil container (5) by return filter (6) with the shunt circuit that bypass valve (4) constitutes.
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 true CN103195124A (en) | 2013-07-10 |
| CN103195124B 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
| CN105862962A (en) * | 2016-05-31 | 2016-08-17 | 青岛雷沃挖掘机有限公司 | Hydraulic circuit for reducing oil return backpressure |
| 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010064A (en) * | 2005-06-30 | 2007-01-18 | Kobelco Contstruction Machinery Ltd | Hydraulic controller of construction machine |
| 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 |
| CN101775822A (en) * | 2009-12-31 | 2010-07-14 | 福田雷沃国际重工股份有限公司 | Excavator swing arm descending hydraulic control loop |
| CN102251547A (en) * | 2011-06-14 | 2011-11-23 | 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 |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 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 |
-
2013
- 2013-04-03 CN CN201310116555.8A patent/CN103195124B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010064A (en) * | 2005-06-30 | 2007-01-18 | Kobelco Contstruction Machinery Ltd | Hydraulic controller of construction machine |
| 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 |
| CN101775822A (en) * | 2009-12-31 | 2010-07-14 | 福田雷沃国际重工股份有限公司 | Excavator swing arm descending hydraulic control loop |
| CN102251547A (en) * | 2011-06-14 | 2011-11-23 | 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 |
| CN102418354A (en) * | 2011-10-28 | 2012-04-18 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541395A (en) * | 2013-09-26 | 2014-01-29 | 徐州徐工挖掘机械有限公司 | Hydraulic excavator energy-conservation control system |
| 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 |
| CN105862962A (en) * | 2016-05-31 | 2016-08-17 | 青岛雷沃挖掘机有限公司 | Hydraulic circuit for reducing oil return backpressure |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195124B (en) | 2015-09-23 |
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| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of 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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