CN102966140A - Energy-saving control method for double pumps of work hydraulic system of loader - Google Patents
Energy-saving control method for double pumps of work hydraulic system of loader Download PDFInfo
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- CN102966140A CN102966140A CN2012104631047A CN201210463104A CN102966140A CN 102966140 A CN102966140 A CN 102966140A CN 2012104631047 A CN2012104631047 A CN 2012104631047A CN 201210463104 A CN201210463104 A CN 201210463104A CN 102966140 A CN102966140 A CN 102966140A
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Abstract
The invention discloses an energy-saving control method for double pumps of a work hydraulic system of a loader. The energy-saving control method comprises the following steps of: arranging a hydraulic pump shunting and diverting system on a small-tonnage loader; arranging a pressure-gradient control valve before in front of a steering system for bring convenience to prior supply to a the steering system by a steering pump through the pressure-gradient control valve; when the steering pump does not steer, enabling the flow of the steering pump to sequentially pass through the pressure-gradient control valve and a one-way valve and then be combined with a work pump to provide power oil for the hydraulic system; reducing the displacement and the heating amount by adopting a dual-pump shunting hydraulic system and reducing the load of an engine; and when the pressure is reduced to a lower limit set value set by a pressure gauge, electrifying and starting a motor and enabling the motor to enter a normal work state, thus enabling the motor to have high rotating speed. The energy-saving control method disclosed by the invention has the beneficial effects that the steering pump is facilitated to be reasonably utilized to enable the steering pump to be mutually matched with the load and increase the efficiency of the hydraulic system; the hydraulic system can quickly enter a normal work state; the integral work efficiency of the equipment is increased; and electric energy is saved.
Description
Technical field
The present invention relates to the hydraulic technique field, relate in particular to a kind of loader hydraulic system of working double pump energy-saving control method.
Background technology
Hydraulic system is ingredient important in the loader, and the upset of the swing arm lifting of loader, scraper bowl and complete machine such as turn to all to need to drive to finish by hydraulic system at the elemental motion.The too high problem of oil temperature often appears in loader in use hydraulic system, show according to factual survey, during loader work oil temperature in hydraulic system higher be one of principal element of affecting hydraulic system and reliability of hydraulic component and complete machine operating efficiency.Therefore, guaranteeing that the thermal equilibrium temperature of loader hydraulic system is in normal condition, is to guarantee the loader reliably working, improves the key of hydraulic system efficient; Cause that the too high factor of oil temperature in hydraulic system mainly contains: the pressure loss of the volumetric loss of hydraulic pump and hydraulic cylinder, valve element and pipeline parts, the mechanical friction loss of each class component etc.These losses finally form power losses and generate heat, the heat that produces is dispersed into the space by radiator and each Hydraulic Elements, pipeline, tank surface except a part, load variations was larger when all the other major parts can cause the work of hydraulic oil temperature rising loader, and machining device hydraulic system is driven by constant displacement pump.Therefore, spill losses, meta off-load loss and the restriction loss of hydraulic system of loading machine working device under different operating modes is the one of the main reasons that causes that oil temperature is too high; For reducing spill losses, meta off-load loss and the restriction loss of hydraulic system of loading machine working device under different operating modes, the utilization rate that improves hydraulic system has great importance.Loader is to use very widely a kind of engineering machinery, its groundwork device is swing arm and scraper bowl, elemental motion comprises: scraper bowl is inserted then reversible bucket of material, improving material is to certain altitude, when keeping load, material transportation is arrived the appointed place, dump, return at last charging place, so cycle operation.But the main cause of a lot of hydraulic system of loading machine working device energy losses is output flow, the output pressure of pump can not be complementary with flow, the pressure of loading demand, has more spill losses, restriction loss and meta off-load loss.
Summary of the invention
The purpose of this invention is to provide and a kind ofly make pump and load mutually mate, improve hydraulic system efficient, saves energy, can reduce the loader hydraulic system of working double pump energy-saving control method of equipment cost, to solve many deficiencies of prior art.
Purpose of the present invention is come specific implementation by the following technical programs:
A kind of loader hydraulic system of working double pump energy-saving control method mainly is comprised of following steps:
⑴ at first be respectively installed to the position with used motor and oil pump unit, hydraulic motor, connects successively choke valve, electronic one way valve and accumulator at the outside oil circuit of set hydraulic motor;
⑵ arrange hydraulic pump at the loader of little tonnage and close separate system, a pressure-gradient control valve was set so that steering pump is preferentially supplied with steering by pressure-gradient control valve before steering, when not turning to, allow the steering pump flow pass through successively pressure-gradient control valve and one way valve, merging to hydraulic system with working barrel provides power oil again;
⑶ then adopt dual-pump combining hydraulic system to reduce working barrel discharge capacity and calorific value, and alleviate engine load;
⑷ when arrive the lower limit set value of pressure meter setting when pressure decreased, with the electrical power starting, enter normal operating conditions, thereby motor has very high rotating speed when starting.
The beneficial effect of loader hydraulic system of working double pump energy-saving control method of the present invention is: be conducive to rationally utilize steering pump to make pump and load mutually mate, improve hydraulic system efficient, can enter very soon normal operating conditions, improve the operating efficiency of Whole Equipment, saved electric energy.
The specific embodiment
The described loader hydraulic system of working of embodiment of the invention double pump energy-saving control method, its key step comprises:
⑴ at first be respectively installed to the position with used motor and oil pump unit, hydraulic motor, connects successively choke valve, electronic one way valve and accumulator at the outside oil circuit of set hydraulic motor;
⑵ arrange hydraulic pump at the loader of little tonnage and close separate system, a pressure-gradient control valve was set so that steering pump is preferentially supplied with steering by pressure-gradient control valve before steering, when not turning to, allow the steering pump flow pass through successively pressure-gradient control valve and one way valve, merging to hydraulic system with working barrel provides power oil again;
⑶ then adopt dual-pump combining hydraulic system to reduce working barrel discharge capacity and calorific value, and alleviate engine load;
⑷ when arrive the lower limit set value of pressure meter setting when pressure decreased, with the electrical power starting, enter normal operating conditions, thereby motor has very high rotating speed when starting.
Claims (1)
1. a loader hydraulic system of working double pump energy-saving control method is characterized in that, mainly is comprised of following steps:
⑴ at first be respectively installed to the position with used motor and oil pump unit, hydraulic motor, connects successively choke valve, electronic one way valve and accumulator at the outside oil circuit of set hydraulic motor;
⑵ arrange hydraulic pump at the loader of little tonnage and close separate system, a pressure-gradient control valve was set so that steering pump is preferentially supplied with steering by pressure-gradient control valve before steering, when not turning to, allow the steering pump flow pass through successively pressure-gradient control valve and one way valve, merging to hydraulic system with working barrel provides power oil again;
⑶ then adopt dual-pump combining hydraulic system to reduce working barrel discharge capacity and calorific value, and alleviate engine load;
⑷ when arrive the lower limit set value of pressure meter setting when pressure decreased, with the electrical power starting, enter normal operating conditions, thereby motor has very high rotating speed when starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104631047A CN102966140A (en) | 2012-11-16 | 2012-11-16 | Energy-saving control method for double pumps of work hydraulic system of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104631047A CN102966140A (en) | 2012-11-16 | 2012-11-16 | Energy-saving control method for double pumps of work hydraulic system of loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102966140A true CN102966140A (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104631047A Pending CN102966140A (en) | 2012-11-16 | 2012-11-16 | Energy-saving control method for double pumps of work hydraulic system of loader |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773216A (en) * | 1985-01-22 | 1988-09-27 | Kanzaki Kokykoki Mfg. Co. Ltd. | Flow divider valve for hydraulic system in working vehicles |
| CN102094441A (en) * | 2010-12-23 | 2011-06-15 | 山东临工工程机械有限公司 | Hydraulic system of loader |
| CN102155440A (en) * | 2011-04-06 | 2011-08-17 | 上海朝田实业有限公司 | Hydraulic energy-saving motor device of hydraulic pump station |
| CN102296665A (en) * | 2011-06-23 | 2011-12-28 | 上海三一重机有限公司 | Excavator hydraulic system carrying load sensing main valve and positive flow pump |
-
2012
- 2012-11-16 CN CN2012104631047A patent/CN102966140A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773216A (en) * | 1985-01-22 | 1988-09-27 | Kanzaki Kokykoki Mfg. Co. Ltd. | Flow divider valve for hydraulic system in working vehicles |
| CN102094441A (en) * | 2010-12-23 | 2011-06-15 | 山东临工工程机械有限公司 | Hydraulic system of loader |
| CN102155440A (en) * | 2011-04-06 | 2011-08-17 | 上海朝田实业有限公司 | Hydraulic energy-saving motor device of hydraulic pump station |
| CN102296665A (en) * | 2011-06-23 | 2011-12-28 | 上海三一重机有限公司 | Excavator hydraulic system carrying load sensing main valve and positive flow pump |
Non-Patent Citations (1)
| Title |
|---|
| 李晶洁: ""装载机工作装置液压系统的节能研究"", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅱ辑（月刊）》 * |
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Application publication date: 20130313 |