CN102927087A - Control technology for hydraulic pump system self-adaptive to loading pressure - Google Patents
Control technology for hydraulic pump system self-adaptive to loading pressure Download PDFInfo
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- CN102927087A CN102927087A CN2012104630928A CN201210463092A CN102927087A CN 102927087 A CN102927087 A CN 102927087A CN 2012104630928 A CN2012104630928 A CN 2012104630928A CN 201210463092 A CN201210463092 A CN 201210463092A CN 102927087 A CN102927087 A CN 102927087A
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Abstract
The invention discloses a control technology for a hydraulic pump system self-adaptive to loading pressure. The control technology comprises the steps as follows: mounting a variable pump in the system, wherein the variable pump is connected with another added throttle valve; starting the variable pump; exerting the pressure to the variable pump so as to ensure the output pressure of the variable pump is equal to the difference between the loading pressure and the inlet and outlet pressure of the original throttle valve; feeding back the loading pressure to a right chamber of a load sensitive control valve by a load sensitive port X of a load sensitive variable pump when the loading pressure is increased, and synchronously, adjusting a valve core of the load sensitive control valve to move leftwards so as to place the load sensitive control valve to a right position; and transferring the oil output by the variable pump into a variable oil cylinder through the load sensitive control valve and a pressure control valve until the stress on the valve core of the load sensitive control valve is balanced again. The control technology has the beneficial effects that a steering pump is reasonably utilized, so that the pump is matched with the load, normal working state can be achieved very quickly, the working efficiency of the whole equipment can be increased, and the electricity can be saved.
Description
Technical field
The present invention relates to the hydraulics field, relate in particular to a kind of hydraulic pump system control technique of self-adapting load pressure.
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, and namely delivery pressure can't adapt to the demand of induced pressure automatically.
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 hydraulic pump system control technique of the self-adapting load pressure 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 hydraulic pump system control technique of self-adapting load pressure 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 install a variable displacement pump in said system, this variable displacement pump is connected with another throttle valve of setting up, after variable displacement pump starts, variable displacement pump exerted pressure, and it is poor to make its delivery pressure equal the inlet and outlet pressure of induced pressure and former throttle valve;
⑶ when increase when induced pressure, induced pressure feeds back to the right chamber of load-sensitive control valve by the load-sensitive mouth X of load-reacting pump, load-sensitive control valve spool stress balance is broken, at this moment, the responsive control valve spool of regulating load is to left movement, make the load-sensitive control valve be in right position, the piston of variable oil cylinder is to left movement;
⑷ export fluid with variable displacement pump and pass through respectively load-sensitive control valve and pressure controlled valve, and the entering variable oil cylinder is until the stressed balance that again reaches of the spool of load-sensitive control valve.
The beneficial effect of the hydraulic pump system control technique of self-adapting load pressure of the present invention is: the delivery pressure of pump and flow adapt to the demand of load automatically, 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 hydraulic pump system control technique of the described self-adapting load pressure 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 install a variable displacement pump in said system, this variable displacement pump is connected with another throttle valve of setting up, after variable displacement pump starts, variable displacement pump exerted pressure, and it is poor to make its delivery pressure equal the inlet and outlet pressure of induced pressure and former throttle valve;
⑶ when increase when induced pressure, induced pressure feeds back to the right chamber of load-sensitive control valve by the load-sensitive mouth X of load-reacting pump, load-sensitive control valve spool stress balance is broken, at this moment, the responsive control valve spool of regulating load is to left movement, make the load-sensitive control valve be in right position, the piston of variable oil cylinder is to left movement;
⑷ export fluid with variable displacement pump and pass through respectively load-sensitive control valve and pressure controlled valve, and the entering variable oil cylinder is until the stressed balance that again reaches of the spool of load-sensitive control valve.
Claims (1)
1. the hydraulic pump system control technique of a self-adapting load pressure 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 install a variable displacement pump in said system, this variable displacement pump is connected with another throttle valve of setting up, after variable displacement pump starts, variable displacement pump exerted pressure, and it is poor to make its delivery pressure equal the inlet and outlet pressure of induced pressure and former throttle valve;
⑶ when increase when induced pressure, induced pressure feeds back to the right chamber of load-sensitive control valve by the load-sensitive mouth X of load-reacting pump, load-sensitive control valve spool stress balance is broken, at this moment, the responsive control valve spool of regulating load is to left movement, make the load-sensitive control valve be in right position, the piston of variable oil cylinder is to left movement;
⑷ export fluid with variable displacement pump and pass through respectively load-sensitive control valve and pressure controlled valve, and the entering variable oil cylinder is until the stressed balance that again reaches of the spool of load-sensitive control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104630928A CN102927087A (en) | 2012-11-16 | 2012-11-16 | Control technology for hydraulic pump system self-adaptive to loading pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104630928A CN102927087A (en) | 2012-11-16 | 2012-11-16 | Control technology for hydraulic pump system self-adaptive to loading pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102927087A true CN102927087A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104630928A Withdrawn CN102927087A (en) | 2012-11-16 | 2012-11-16 | Control technology for hydraulic pump system self-adaptive to loading pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN102927087A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821922A (en) * | 2019-11-14 | 2020-02-21 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN116624459A (en) * | 2023-07-19 | 2023-08-22 | 山河智能装备股份有限公司 | Self-adaptive pressurizing hydraulic system and construction equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010860A1 (en) * | 1978-09-28 | 1980-05-14 | Eaton Corporation | Load sensing control for hydraulic system |
| DE3030175A1 (en) * | 1979-08-30 | 1981-03-12 | Åkermans Verkstad AB, Eslöv | HYDRAULIC CIRCLE |
| CN102182724A (en) * | 2011-03-29 | 2011-09-14 | 江苏柳工机械有限公司 | Method and system for controlling power matching of mobile working machine |
| CN102416940A (en) * | 2011-10-14 | 2012-04-18 | 三一重工股份有限公司 | Hydraulic control system and engineering machine |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
-
2012
- 2012-11-16 CN CN2012104630928A patent/CN102927087A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010860A1 (en) * | 1978-09-28 | 1980-05-14 | Eaton Corporation | Load sensing control for hydraulic system |
| DE3030175A1 (en) * | 1979-08-30 | 1981-03-12 | Åkermans Verkstad AB, Eslöv | HYDRAULIC CIRCLE |
| CN102182724A (en) * | 2011-03-29 | 2011-09-14 | 江苏柳工机械有限公司 | Method and system for controlling power matching of mobile working machine |
| CN102416940A (en) * | 2011-10-14 | 2012-04-18 | 三一重工股份有限公司 | Hydraulic control system and engineering machine |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821922A (en) * | 2019-11-14 | 2020-02-21 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN110821922B (en) * | 2019-11-14 | 2020-10-30 | 江苏万川液压机械设备有限公司 | Sensitive servo monitoring compensation system for foundation pit horizontal supporting axial force and displacement load |
| CN116624459A (en) * | 2023-07-19 | 2023-08-22 | 山河智能装备股份有限公司 | Self-adaptive pressurizing hydraulic system and construction equipment |
| CN116624459B (en) * | 2023-07-19 | 2023-10-20 | 山河智能装备股份有限公司 | Self-adaptive pressurizing hydraulic system and construction equipment |
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| PB01 | Publication | ||
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20130213 |