CN102943791A - Equivalent unloading energy saving control method for work hydraulic system of loading machine - Google Patents
Equivalent unloading energy saving control method for work hydraulic system of loading machine Download PDFInfo
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- CN102943791A CN102943791A CN2012104630932A CN201210463093A CN102943791A CN 102943791 A CN102943791 A CN 102943791A CN 2012104630932 A CN2012104630932 A CN 2012104630932A CN 201210463093 A CN201210463093 A CN 201210463093A CN 102943791 A CN102943791 A CN 102943791A
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Abstract
The invention discloses an equivalent unloading energy saving control method for a work hydraulic system of a loading machine. According to the method, firstly, a hydraulic pump flow gathering and division system is arranged on the loading machine, then, an equivalent unloading value is additionally arranged in the system, in addition, the pressure is set to be 14MPa, a steering pump preferentially supplies to a steering system, and when the steering is not needed and the outlet pressure is smaller than 14MPa, pressure oil sequentially passes through a pressure-gradient control valve and a one-way value; under the condition that the outlet pressure of a work pump is greater than 14MPa, the steering pump provides pressure oil, and the unloading is carried out through the equivalent unloading value; and when the pressure is reduced to the lower limit set value set by a pressure meter, a motor is electrified for starting and enters the normal work state, so the motor has high rotating speed during starting. The equivalent unloading energy saving control method has the beneficial effects that the steering pump is favorably and reasonably utilized so that the pump and the load are mutually matched, the efficiency of the hydraulic system is improved, the effect of fast entering the normal work state can be realized, the whole work efficiency of equipment is improved, and the electric energy is saved.
Description
Technical field
The present invention relates to the hydraulics field, relate in particular to the equivalent off-load energy-saving control method of a kind of loader hydraulic system of working.
Background technique
Hydraulic system is constituent element 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 working efficiency.Therefore, guaranteeing that the thermal equilibrium temperature of loader hydraulic system is in normal state, 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 oil hydraulic pump and oil 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 element, 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 metering 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 ratio 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 delivery 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, saving power, can reduce the equivalent off-load energy-saving control method of loader hydraulic system of working of equipment cost, to solve many deficiencies of prior art.
Purpose of the present invention is come specific implementation by the following technical programs:
The equivalent off-load energy-saving control method of a kind of loader hydraulic system of working mainly is comprised of following steps:
⑴ at first be respectively installed to the position with used motor and oil pump unit, oil hydraulic motor, connects successively throttle valve, electronic one-way valve and accumulator at the outside oil circuit of set oil hydraulic motor;
⑵ at first arrange oil hydraulic pump and close separate system on loader, installing an equivalent unloading valve and setting pressure in this system additional is 14MPa again, steering pump is preferentially supplied with steering system, when not turning to and outlet pressure less than 14MPa, pressure oil passes through pressure-gradient control valve and one-way valve successively;
The working pump outlet pressure greater than the 14MPa situation under, steering pump provides pressure oil to carry out off-load through equivalent unloading valve, changes the loader hydraulic input flow rate thereby be implemented in, the minimizing spill losses in setting pressure the interval in;
⑷ when arrive the lower limit set value of pressure gauge setting when pressure decreased, with the electrical power starting, enter normal working, thereby motor has very high rotating speed when starting.
The beneficial effect of the equivalent off-load energy-saving control method of loader hydraulic system of working 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 working, improve the working efficiency of Whole Equipment, saved electric energy.
Embodiment
The equivalent off-load energy-saving control method of the described loader hydraulic system of working of the embodiment of the invention, its key step comprises:
⑴ at first be respectively installed to the position with used motor and oil pump unit, oil hydraulic motor, connects successively throttle valve, electronic one-way valve and accumulator at the outside oil circuit of set oil hydraulic motor;
⑵ at first arrange oil hydraulic pump and close separate system on loader, installing an equivalent unloading valve and setting pressure in this system additional is 14MPa again, steering pump is preferentially supplied with steering system, when not turning to and outlet pressure less than 14MPa, pressure oil passes through pressure-gradient control valve and one-way valve successively;
The working pump outlet pressure greater than the 14MPa situation under, steering pump provides pressure oil to carry out off-load through equivalent unloading valve, changes the loader hydraulic input flow rate thereby be implemented in, the minimizing spill losses in setting pressure the interval in;
⑷ when arrive the lower limit set value of pressure gauge setting when pressure decreased, with the electrical power starting, enter normal working, thereby motor has very high rotating speed when starting.
Claims (1)
1. the equivalent off-load energy-saving control method of loader hydraulic system of working 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, oil hydraulic motor, connects successively throttle valve, electronic one-way valve and accumulator at the outside oil circuit of set oil hydraulic motor;
⑵ at first arrange oil hydraulic pump and close separate system on loader, installing an equivalent unloading valve and setting pressure in this system additional is 14MPa again, steering pump is preferentially supplied with steering system, when not turning to and outlet pressure less than 14MPa, pressure oil passes through pressure-gradient control valve and one-way valve successively;
The working pump outlet pressure greater than the 14MPa situation under, steering pump provides pressure oil to carry out off-load through equivalent unloading valve, changes the loader hydraulic input flow rate thereby be implemented in, the minimizing spill losses in setting pressure the interval in;
⑷ when arrive the lower limit set value of pressure gauge setting when pressure decreased, with the electrical power starting, enter normal working, thereby motor has very high rotating speed when starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104630932A CN102943791A (en) | 2012-11-16 | 2012-11-16 | Equivalent unloading energy saving control method for work hydraulic system of loading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104630932A CN102943791A (en) | 2012-11-16 | 2012-11-16 | Equivalent unloading energy saving control method for work hydraulic system of loading machine |
Publications (1)
| Publication Number | Publication Date |
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| CN102943791A true CN102943791A (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104630932A Withdrawn CN102943791A (en) | 2012-11-16 | 2012-11-16 | Equivalent unloading energy saving control method for work hydraulic system of loading machine |
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| Country | Link |
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| CN (1) | CN102943791A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102229328A (en) * | 2011-05-05 | 2011-11-02 | 四川大学 | Vehicle mechanical energy-saving hydraulic system with multi-pump confluence |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
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2012
- 2012-11-16 CN CN2012104630932A patent/CN102943791A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102229328A (en) * | 2011-05-05 | 2011-11-02 | 四川大学 | Vehicle mechanical energy-saving hydraulic system with multi-pump confluence |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
Non-Patent Citations (2)
| Title |
|---|
| 李晶洁: "装载机工作装置液压系统的节能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 04, 15 April 2011 (2011-04-15) * |
| 贡凯军: "再谈装载机双泵合分流等值卸荷系统", 《工程机械》, vol. 38, 15 February 2007 (2007-02-15) * |
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Application publication date: 20130227 |