CN206017290U - Load-sensitive axial plunger pump - Google Patents
Load-sensitive axial plunger pump Download PDFInfo
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- CN206017290U CN206017290U CN201621007164.8U CN201621007164U CN206017290U CN 206017290 U CN206017290 U CN 206017290U CN 201621007164 U CN201621007164 U CN 201621007164U CN 206017290 U CN206017290 U CN 206017290U
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Abstract
The utility model is related to a kind of load-sensitive axial plunger pump, belong to hydraulic control system technical field, including inclined disc type oil pump and variable oil cylinder, also include load-reacting device, load-reacting device includes being sequentially connected in series and being integrated in the load-sensitive valve in same valve body, pressure shut-off valve and power control valve, the plug chamber connection load-sensitive valve of variable oil cylinder, the oil-out connection external control hydraulic fluid port A of inclined disc type oil pump, the rod cavity of variable oil cylinder, the control port of load-sensitive valve and the control port of pressure shut-off valve, power control valve left end is provided with adjustment spring, adjustment spring connection control piston.The utility model is rational in infrastructure, can be according to executing agency's traffic demand pilot plunger pumpage, and Ioad-sensing control is by comparing the pressure before and after sensing throttle orifice.The characteristics of there is efficient, energy-conservation also, it can in addition contain make multiple executive components while and being particularly suited for construction machinery industry with friction speed and pressure duty independently of each other.
Description
Technical field
The utility model belongs to hydraulic control system technical field, and in particular to a kind of load-sensitive axial plunger pump.
Background technology
In hydraulic transmission technology, valve control load sensitive system has less internal losses, towards the flow of executive component
Closer to fuel supply flow rate, lose also less；And if adopting constant-voltage system, all unnecessary flows are by by the overflow of system
Valve returns fuel tank, thus pump is always operated under full load.Compared with both the above system, the efficiency of pump control load sensitive system
Higher, the efficiency of the system depends primarily on the efficiency of pump.
Utility model content
The purpose of this utility model is to provide a kind of load-sensitive axial plunger pump, can be with induction system pressure and flow
Demand, and enable plunger displacement pump to make correct response to the changes in demand of flow pressure, therefore, it is possible to save fuel, reduce hydraulic pressure system
The caloric value of system, realizes that hydraulic system runs the energy-conservation of overall process.
The utility model load-sensitive axial plunger pump, including inclined disc type oil pump and variable oil cylinder, inclined disc type oil pump connection
Driving means and oil pump suction mouth S, inclined disc type oil pump one end are connected with the in-oil cylinder piston rod of variable, also include that load-sensitive becomes
Amount device, load-reacting device include being sequentially connected in series and be integrated in load-sensitive valve in same valve body, pressure cut off
Valve and power control valve, the priority of three are followed successively by pressure shut-off valve, power control valve and load-sensitive valve, variable oil cylinder
Plug chamber connect load-sensitive valve a hydraulic fluid port, inclined disc type oil pump oil-out connection external control hydraulic fluid port A, the rod cavity of variable oil cylinder,
The control port of load-sensitive valve and the control port of pressure shut-off valve, pressure shut-off valve, power control valve and load-sensitive valve
There is a hydraulic fluid port to be connected with the oil-out of inclined disc type oil pump in the oil pocket being serially connected, power control valve left end is provided with adjustment
Spring, adjusts spring connecting rocker arm, and the rocking arm other end is contacted with control piston tip, and the control piston other end is stretched into and is arranged on work
Control cylinder in stopper rod, control cylinder connect the oil-out of inclined disc type oil pump, and load-sensitive valve left end is connected by flowline
Connect and external control hydraulic fluid port A, on flowline, be provided with outside sensing throttle orifice.
The control port end of the load-sensitive valve is provided with damping.
The rod cavity of the variable oil cylinder is provided with back-moving spring.
Compared with prior art, the utility model has the advantage of：
Rational in infrastructure, on the basis of traditional invariable power constant-pressure variable control, increase load-sensitive function, load-sensitive valve
It is the flow control element according to load pressure function operation, according to executing agency's traffic demand pilot plunger pumpage.Load
Sensitive control is by comparing the pressure before and after sensing throttle orifice, and maintains to keep constant by the pressure drop in hole.If at sensing hole
Pressure reduction △ P increase, plunger displacement pump towards Vgmin move；And if pressure reduction △ P at sensing hole reduce, plunger displacement pump is towards Vgmax
Motion, until the pressure drop in sensing hole recovers.There is Ioad-sensing control function, system have efficiently, energy-conservation the characteristics of, in addition
The system can also make multiple executive components while and being particularly suited for engineering with friction speed and pressure duty independently of each other
Machinery industry.
Description of the drawings
Fig. 1 is hydraulic schematic diagram of the present utility model；
In figure：1st, load-sensitive valve, 2, pressure shut-off valve, 3, power control valve, 4, rocking arm, 5, control piston, 6, variable
Oil cylinder, 7, outside sensing throttle orifice, 8, control cylinder, 9, inclined disc type oil pump, 10, adjustment spring, 11, damping.
Specific embodiment
Below against accompanying drawing, by the description to optimum embodiment, specific embodiment of the present utility model is made into one
Step detailed description.
Load-sensitive axial plunger pump as shown in Figure 1, including inclined disc type oil pump 9 and variable oil cylinder 6, inclined disc type oil pump 9
Connection driving means and oil pump suction mouth S, 9 one end of inclined disc type oil pump is connected with the piston rod in variable oil cylinder 6, also includes loading
Sensitive variable device, load-reacting device include being sequentially connected in series and be integrated in load-sensitive valve 1 in same valve body, pressure
Power stop valve 2 and power control valve 3, the priority of three are followed successively by pressure shut-off valve 2, power control valve 3 and load-sensitive valve
1, a hydraulic fluid port of the plug chamber connection load-sensitive valve 1 of variable oil cylinder 6, the oil-out connection external control hydraulic fluid port A of inclined disc type oil pump 9,
The rod cavity of variable oil cylinder 6, the control port of load-sensitive valve 1 and the control port of pressure shut-off valve 2, pressure shut-off valve 2, power
There is a hydraulic fluid port to be connected with the oil-out of inclined disc type oil pump 9 in the oil pocket that control valve 3 and load-sensitive valve 1 are serially connected, work(
Rate control 3 left end of valve is provided with adjustment spring 10, adjusts 10 connecting rocker arm 4 of spring, the Rocker arm 4 other end and 5 top of control piston
The control cylinder 8 being arranged in piston rod is stretched in contact, control 5 other end of piston, and control cylinder 8 connects inclined disc type oil pump 9
Oil-out, 1 left end of load-sensitive valve are provided with outside sensing section by flowline connection and external control hydraulic fluid port A on flowline
Discharge orifice 7.
I.e. power limitation control works when less than pressure cut off preset pressure, and Ioad-sensing control is being less than power curve
Work during with pressure cut off preset value.
The control port end of load-sensitive valve 1 is provided with damping 11.
The rod cavity of variable oil cylinder 6 is provided with back-moving spring.
Load-sensitive valve 1, according to the flow that load pressure adjusts inclined disc type oil pump 9, makes plunger POF and execution
The traffic demand of element is adapted, if the pressure reduction △ P increases at outside sensing throttle orifice 7, piston rod is moved towards Vgmin；
And if the pressure reduction △ P of outside sensing throttle orifice 7 reduce, piston rod is moved towards Vgmax, until on outside sensing throttle orifice 7
Pressure drop recover.
Pressure shut-off valve 2, it are a kind of Stress controls, when load reaches pressure value set in advance, pressure shut-off valve 2
Move to left, make the plug of variable oil cylinder 6 chamber connect hydraulic oil, promote swash plate to be rocked to and be close to zero delivery.
The output flow of power control valve 3, adjusting work pressure and plunger displacement pump, so that less than pre- under constant rotating speed
Fixed driving power, operating pressure apply a power on control piston 5, and control piston 5 promotes Rocker arm 4, and one can be from outer
Portion adjustment spring 10 spring-force driven dual Rocker arm 4 opposite side to determine set value of the power, if operating pressure exceed set
Spring force, power control valve 3 operated by Rocker arm 4, piston rod is moved towards Vgmin, is caused the effective torque on Rocker arm 4 to subtract
Little, so that operating pressure is improved with the same ratio that output flow reduces.
In sum, the utility model is rational in infrastructure, on the basis of traditional invariable power constant-pressure variable control, increases load
Sensitive function, load-sensitive valve are the flow control elements according to load pressure function operation, according to executing agency's traffic demand
Pilot plunger pumpage.Ioad-sensing control is by comparing the pressure before and after sensing throttle orifice, and maintains to protect by the pressure drop in hole
Hold constant.If the pressure reduction △ P increases at sensing hole, plunger displacement pump are moved towards Vgmin；And if the pressure reduction △ P at sensing hole
Reduce, plunger displacement pump is moved towards Vgmax, until the pressure drop in sensing hole recovers.There is Ioad-sensing control function, system to have
Efficiently, the characteristics of energy-conservation, in addition the system can also make multiple executive components while and independently of each other with friction speed and pressure
Power works, and is particularly suited for construction machinery industry.
The above is that the utility model is exemplarily described, it is clear that the utility model is implemented
The restriction of formula, whether does any change in its shape or structure, if employ method of the present utility model design and
The improvement of the various unsubstantialities that technical scheme is carried out, or not improved by of the present utility model design and technical scheme directly should
For other occasions, within protection domain of the present utility model.
Claims (3)
1. a kind of load-sensitive axial plunger pump, including inclined disc type oil pump (9) and variable oil cylinder (6), inclined disc type oil pump (9) connect
Driving means and oil pump suction mouth S, inclined disc type oil pump (9) one end are connected with the piston rod in variable oil cylinder (6), it is characterised in that
Also include that load-reacting device, load-reacting device include being sequentially connected in series and being integrated in the load in same valve body
Sensitive valve (1), pressure shut-off valve (2) and power control valve (3), the priority of three are followed successively by pressure shut-off valve (2), power control
Valve (3) processed and load-sensitive valve (1), a hydraulic fluid port in plug chamber connection load-sensitive valve (1) of variable oil cylinder (6), inclined disc type oil
The oil-out connection external control hydraulic fluid port A of pump (9), the rod cavity of variable oil cylinder (6), the control port of load-sensitive valve (1) and pressure are cut
The control port of disconnected valve (2), in the oil pocket that pressure shut-off valve (2), power control valve (3) and load-sensitive valve (1) are serially connected
There are a hydraulic fluid port and the oil-out of inclined disc type oil pump (9) to be connected, power control valve (3) left end is provided with adjustment spring (10),
Adjustment spring (10) connecting rocker arm (4), rocking arm (4) other end and control piston (5) tip contact, control piston (5) other end
The control cylinder (8) being arranged in piston rod is stretched into, control cylinder (8) connects the oil-out of inclined disc type oil pump (9), load-sensitive
Valve (1) left end is provided with outside sensing throttle orifice (7) by flowline connection and external control hydraulic fluid port A on flowline.
2. load-sensitive axial plunger pump according to claim 1, it is characterised in that the control of load-sensitive valve (1)
Hydraulic fluid port end is provided with damping (11).
3. load-sensitive axial plunger pump according to claim 1, it is characterised in that the rod cavity of variable oil cylinder (6) sets
It is equipped with back-moving spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621007164.8U CN206017290U (en) | 2016-08-31 | 2016-08-31 | Load-sensitive axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621007164.8U CN206017290U (en) | 2016-08-31 | 2016-08-31 | Load-sensitive axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206017290U true CN206017290U (en) | 2017-03-15 |
Family
ID=58255064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621007164.8U Active CN206017290U (en) | 2016-08-31 | 2016-08-31 | Load-sensitive axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206017290U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826836A (en) * | 2019-01-11 | 2019-05-31 | 徐州工业职业技术学院 | A kind of intelligent variable pump and hydraulic control system |
| CN111779649A (en) * | 2020-06-30 | 2020-10-16 | 潍柴动力股份有限公司 | Variable power control device and hydraulic system |
| CN113586544A (en) * | 2021-08-03 | 2021-11-02 | 武汉船用机械有限责任公司 | Lifting hydraulic system of tubing string and use method thereof |
-
2016
- 2016-08-31 CN CN201621007164.8U patent/CN206017290U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826836A (en) * | 2019-01-11 | 2019-05-31 | 徐州工业职业技术学院 | A kind of intelligent variable pump and hydraulic control system |
| CN109826836B (en) * | 2019-01-11 | 2020-07-24 | 徐州工业职业技术学院 | Intelligent variable pump and hydraulic control system |
| CN111779649A (en) * | 2020-06-30 | 2020-10-16 | 潍柴动力股份有限公司 | Variable power control device and hydraulic system |
| CN113586544A (en) * | 2021-08-03 | 2021-11-02 | 武汉船用机械有限责任公司 | Lifting hydraulic system of tubing string and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 272001 Shandong city of Jining province high tech Zone Haichuan Road No. 66 Patentee after: Shandong Taifeng intelligent control Limited by Share Ltd Address before: 272001 Shandong city of Jining province high tech Zone Haichuan Road No. 66 Patentee before: Shandong Taifeng Hydraulic Co., Ltd. |