CN2594494Y - Hydraulic controller of constant-power variable control pump - Google Patents
Hydraulic controller of constant-power variable control pump Download PDFInfo
- Publication number
- CN2594494Y CN2594494Y CN 03219321 CN03219321U CN2594494Y CN 2594494 Y CN2594494 Y CN 2594494Y CN 03219321 CN03219321 CN 03219321 CN 03219321 U CN03219321 U CN 03219321U CN 2594494 Y CN2594494 Y CN 2594494Y
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- valve
- oil cylinder
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Abstract
The utility model discloses a hydraulic control device of a constant-power control variable pump, which is used for a hydraulic system of a truck crane. The utility model is characterized in that an oil cylinder of the device is connected with the variable pump which is connected with a rocker oil cylinder; the rocker is connected between the rocker oil cylinder and a power-set valve; an oil outlet of the variable pump is connected with an oil inlet of the rocker oil cylinder, an oil inlet of the power-set valve, an oil inlet of a pressure-set valve, and an oil inlet of a flow regulating valve; the oil outlet of the variable pump is also connected with an oil inlet of a load sensing valve; an oil outlet of the load sensing valve is connected to the oil inlet of the oil cylinder; another oil outlet of the load sensing valve is connected with an oil outlet of the flow regulating valve. The utility model adopts the constant-power control variable pump with pressure cutting and the load sensing valve, and can operate according to load pressure to enable the utility model to adapt to requirements of execution components; when the utility model has large load or carries out compound motion, the utility model does not exceed the preset driving power, avoids flameout of an engine, reduces energy consumption, and has good effect of energy saving.
Description
Technical field
The utility model relates to the control gear in a kind of system for hydraulic system of truck crane.
Background technique
The hydraulic system that truck crane generally adopts metering pump to drive, the pressure of metering pump, flow can not come work according to induced pressure, make it to adapt to the needs of executive component, cause power consumption big.Also have to adopt the band constant pressure variable displacement pump in addition, constant pressure variable displacement pump just keeps the pressure in the hydraulic system to be constant in its control range, and requires irrelevantly with the pump duty that is changing, and also makes the too much energy of system consumption.
Summary of the invention
The purpose of this utility model is that a kind of permanent power controlled variable pump hydraulic control device will be provided, and the pressure of pump, flow can come work according to induced pressure in this device, make it to adapt to the needs of executive component, reduces energy consumption.
The purpose of this utility model is achieved in that this device comprises oil cylinder, variable displacement pump; rocking arm; rocking arm oil cylinder; power setting valve and pressure are set valve; oil cylinder is connecting variable displacement pump; variable displacement pump is connecting the rocking arm oil cylinder; be connected rocking arm between rocking arm oil cylinder and the power setting valve; the oil outlet of variable displacement pump is connecting rocking arm oil cylinder filler opening; power setting valve filler opening; pressure setting valve filler opening and throttle valve filler opening; the oil outlet of variable displacement pump is also connecting the load-sensing valve filler opening; load-sensing valve has an oil outlet to be connected to the oil cylinder filler opening, and load-sensing valve also has an oil outlet to be connected to the throttle valve oil outlet.
The utility model adopts the permanent power controlled variable pump mode of band pressure cut off and load-sensing valve, the output flow of permanent power regulating and controlling working pressure and variable displacement pump, so that when heavy load or composite move, be no more than predetermined driving power, avoid engine misses.Pressure cut off is constant voltage control, and when reaching predefined force value, it makes variable displacement pump put back to the float amount; Load-sensing valve is a flow control valve, can the pressure reduction between the working pressure of variable displacement pump and the induced pressure be fed back on the flow control valve by the hydraulic proportional control valve in addition.In the hoisting operation process, induced pressure feeds back on the variable displacement pump by hydraulic proportional control valve feedback port.When the pressure reduction between variable displacement pump outlet pressure and the induced pressure increases or reduces, the pivot angle of variable displacement pump reduces or increases, the flow of variable displacement pump is reduced or increase, thereby pressure reduction is constant before and after keeping the hydraulic proportional control valve, make lifting speed not be subjected to load effect and keep constant, make it to adapt to the needs of executive component.
The utility model adopts the permanent power controlled variable pump mode of band pressure cut off and load-sensing valve, and its function is better than metering pump and constant pressure variable displacement pump control mode.It can not only come work according to induced pressure, makes it to adapt to the needs of executive component; And when heavy load or composite move, be no more than predetermined driving power, and avoid engine misses, can make full use of engine power, motor is turned round in high efficiency region, reduce energy consumption, have good energy-saving effect.
Below in conjunction with drawings and Examples the utility model is elaborated.
Description of drawings
Fig. 1 is an embodiment's of the utility model a hydraulic schematic diagram.
Fig. 2 is the power of the variable displacement pump among Fig. 1.
1. power setting valves among the figure, 2. pressure is set valve, 3. load-sensing valve, 4. throttle valve, 5. variable displacement pump, 6. oil cylinder, 7. rocking arm, 8. rocking arm oil cylinder, A. oil outlet, S. inlet port.
Embodiment
In Fig. 1, oil cylinder 6 is connecting variable displacement pump 5, and variable displacement pump 5 is connecting rocking arm oil cylinder 8, is being connected rocking arm 7 between rocking arm oil cylinder 8 and the power setting valve 1.The oil outlet A of variable displacement pump 5 is connecting filler opening, the filler opening of power setting valve 1, the pressure of rocking arm oil cylinder 8 and is setting the filler opening of valve 2 and the filler opening of throttle valve 4.The oil outlet A of variable displacement pump 5 is also connecting two filler openings of load-sensing valve 3.Load-sensing valve 3 has an oil outlet to be connected to the filler opening of oil cylinder 6, and load-sensing valve 3 also has an oil outlet to be connected to the oil outlet of throttle valve 4.
Power setting valve 1 is used for power setting, and working pressure applies a power on the piston of rocking arm oil cylinder 8, and control piston promotes rocking arm 7.The spring force of power setting valve 1 acts on the opposite side of rocking arm 7 to determine set value of the power.If working pressure surpasses the spring force of setting, then power setting valve 1 is operated by rocking arm 7, makes variable displacement pump 5 towards the zero output swing, reduces the effective torque on the rocking arm 7, thereby working pressure is improved with the same ratio that output flow reduces.(P * Q=constant)
Pressure is set valve 2 and is used for the pressure setting, and when reaching predefined force value, it makes variable displacement pump 5 put back to the float amount, and this function has precedence over permanent power control, and promptly permanent power is controlled at when being lower than preset pressure and works.
Load-sensing valve 3 compares the pressure in throttling upstream and throttling downstream and keeps choke pressure drop (pressure differential deltap P=P
Pump-P
Final controlling element) constant, thereby the flow of variable displacement pump 5 is kept constant.If pressure differential deltap P strengthens, then variable displacement pump 5 is towards discharge capacity Vgmin backswing, and if pressure differential deltap P reduces, then pump is shown towards discharge capacity Vgmax, up to restoring balance in load-sensing valve 3.
Claims (1)
1. permanent power controlled variable pump hydraulic control device, this device comprises oil cylinder, variable displacement pump; rocking arm; rocking arm oil cylinder; power setting valve and pressure are set valve; oil cylinder is connecting variable displacement pump; variable displacement pump is connecting the rocking arm oil cylinder; be connected rocking arm between rocking arm oil cylinder and the power setting valve; the oil outlet of variable displacement pump is connecting rocking arm oil cylinder filler opening; power setting valve filler opening; pressure setting valve filler opening and throttle valve filler opening; the oil outlet that it is characterized in that variable displacement pump is also connecting the load-sensing valve filler opening; load-sensing valve has an oil outlet to be connected to the oil cylinder filler opening, and load-sensing valve also has an oil outlet to be connected to the throttle valve oil outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03219321 CN2594494Y (en) | 2003-01-10 | 2003-01-10 | Hydraulic controller of constant-power variable control pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03219321 CN2594494Y (en) | 2003-01-10 | 2003-01-10 | Hydraulic controller of constant-power variable control pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2594494Y true CN2594494Y (en) | 2003-12-24 |
Family
ID=33755502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03219321 Expired - Lifetime CN2594494Y (en) | 2003-01-10 | 2003-01-10 | Hydraulic controller of constant-power variable control pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2594494Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536761A (en) * | 2011-12-26 | 2012-07-04 | 中联重科股份有限公司 | Engineering machinery as well as power control system and power control method of non-electrically-controlled hydraulic pump |
| WO2012171206A1 (en) * | 2011-06-16 | 2012-12-20 | 长沙中联重工科技发展股份有限公司 | Constant power control device and method of variable displacement pump, and concrete pumping device |
| CN102996536A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Load sensitive hydraulic system and power controller thereof as well as crane |
| CN103511369A (en) * | 2013-09-11 | 2014-01-15 | 中航力源液压股份有限公司 | Multi-gear power control variable piston pump |
| CN101896372B (en) * | 2007-12-13 | 2014-08-13 | 斯堪尼亚商用车有限公司 | Method and device for control of power takeoff operation, and vehicle |
| CN104235003A (en) * | 2013-12-13 | 2014-12-24 | 江苏恒立液压有限公司 | Plunger pump control valve and control method thereof |
| CN105114373A (en) * | 2015-08-05 | 2015-12-02 | 南车石家庄车辆有限公司 | Hydraulic control system for impact hammer of rock drilling machine |
| CN105156378A (en) * | 2015-08-31 | 2015-12-16 | 苏州萨伯工业设计有限公司 | Variable control device of hydraulic pump and control method thereof |
| CN105156377A (en) * | 2015-08-31 | 2015-12-16 | 苏州萨伯工业设计有限公司 | Output flow controlling device with hydraulic pump |
| CN105347193A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Constant-power and variable-power point control system and method for crane |
| CN108638267A (en) * | 2018-07-01 | 2018-10-12 | 山东弘发兴凯实业股份有限公司 | Full-automatic tree root cutting machine |
| CN111486087A (en) * | 2020-04-24 | 2020-08-04 | 湖南爱力液压密封技术有限公司 | Constant power control system for oil pump of hydraulic system |
-
2003
- 2003-01-10 CN CN 03219321 patent/CN2594494Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101896372B (en) * | 2007-12-13 | 2014-08-13 | 斯堪尼亚商用车有限公司 | Method and device for control of power takeoff operation, and vehicle |
| WO2012171206A1 (en) * | 2011-06-16 | 2012-12-20 | 长沙中联重工科技发展股份有限公司 | Constant power control device and method of variable displacement pump, and concrete pumping device |
| CN102536761A (en) * | 2011-12-26 | 2012-07-04 | 中联重科股份有限公司 | Engineering machinery as well as power control system and power control method of non-electrically-controlled hydraulic pump |
| CN102536761B (en) * | 2011-12-26 | 2015-01-07 | 中联重科股份有限公司 | Engineering machinery as well as power control system and power control method of non-electrically-controlled hydraulic pump |
| CN102996536A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Load sensitive hydraulic system and power controller thereof as well as crane |
| CN102996536B (en) * | 2012-11-27 | 2015-04-22 | 三一重工股份有限公司 | Load sensitive hydraulic system and power controller thereof as well as crane |
| CN103511369A (en) * | 2013-09-11 | 2014-01-15 | 中航力源液压股份有限公司 | Multi-gear power control variable piston pump |
| CN104235003A (en) * | 2013-12-13 | 2014-12-24 | 江苏恒立液压有限公司 | Plunger pump control valve and control method thereof |
| CN105114373A (en) * | 2015-08-05 | 2015-12-02 | 南车石家庄车辆有限公司 | Hydraulic control system for impact hammer of rock drilling machine |
| CN105114373B (en) * | 2015-08-05 | 2018-09-25 | 中车石家庄车辆有限公司 | The hydraulic control system of rock drill jump bit |
| CN105156378A (en) * | 2015-08-31 | 2015-12-16 | 苏州萨伯工业设计有限公司 | Variable control device of hydraulic pump and control method thereof |
| CN105156377A (en) * | 2015-08-31 | 2015-12-16 | 苏州萨伯工业设计有限公司 | Output flow controlling device with hydraulic pump |
| CN105156377B (en) * | 2015-08-31 | 2018-01-05 | 苏州萨伯工业设计有限公司 | A kind of output flow control device of hydraulic pump |
| CN105347193A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Constant-power and variable-power point control system and method for crane |
| CN108638267A (en) * | 2018-07-01 | 2018-10-12 | 山东弘发兴凯实业股份有限公司 | Full-automatic tree root cutting machine |
| CN111486087A (en) * | 2020-04-24 | 2020-08-04 | 湖南爱力液压密封技术有限公司 | Constant power control system for oil pump of hydraulic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090220 Address after: No. 165 Copper Road, Jiangsu, Xuzhou Province, China: 221004 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: No. 165 Copper Road, Jiangsu, Xuzhou Province, China: 221004 Patentee before: Xuzhou Heavy Machinery Plant |
|
| ASS | Succession or assignment of patent right |
Owner name: XUZHOU HEACY MACHINE CO., LTD. Free format text: FORMER OWNER: XUZHOU HEACY MACHINERY PLANT Effective date: 20090220 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130110 Granted publication date: 20031224 |