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Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation

A multi-way reversing valve, load-sensitive technology, applied in fluid pressure actuating devices, servo motor components, mechanical equipment, etc., can solve the problems of high pressure loss rate, inaccurate control, complex structure, etc., and achieve full power and softness. Smoothness, high degree of control and reliability, and improved accuracy

Active Publication Date: 2010-10-13
SHANDONG TAIFENG INTELLIGENT CONTROL CO LTD
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a load-sensitive pressure compensation oil return throttling control multi-way reversing valve system, which uses the control of the oil return of the actuator and load pressure compensation to overcome the inaccurate Control, high pressure loss rate, complex structure, high cost and other factors, to achieve the purpose of precise control of the oil return of the actuator and load pressure compensation

Method used

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  • Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation
  • Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation

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Embodiment Construction

[0012] With reference to the accompanying drawings, the multi-way reversing valve system with load-sensing pressure compensation and throttling control of the present invention is composed of a load-sensing variable pump 1, a flow control valve 19, a pressure cut-off valve 20, a power regulating valve 21, a variable oil cylinder 22, Variable oil cylinder 24, swash plate 23, system relief valve 3, pilot unloading valve 4, pressure reducing valve 5, reversing valve 7, one-way valve 8, one-way valve 14, compensator 10, overload valve 11, overload valve 12. Filter 15, throttle valve 16, control port 6, and control port 13. Pump outlet 18 communicates with system overflow valve 3, pilot unloading valve 4, check valve 14, and filter 15. System overflow Flow valve 3, pilot relief valve 4, reversing valve 7, overload valve 11, overload valve 12 communicate with oil return port 17, filter 15 communicates with throttle valve 16, throttle valve 16 communicates with pressure reducing valve...

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Abstract

The invention relates to a multiple directional control valve system for return oil throttle control with load sensitive pressure compensation, in particular to a multiple directional control valve system apparatus for the return oil throttle control with load sensitive pressure compensation for excavators. In the system, a filter is communicated with a throttle valve communicated with a pressure reducing valve, the pressure reducing valve is communicated with a load sensor port, two ends of the control valve are respectively connected with a first control port or second control port, the load sensor port is communicated with a one-way valve communicated with a pressure compensator, and the pressure compensator is communicated with the control valve. The outlet of a load sensitive variable pump is respectively communicated with a flow control valve, a pressure stop valve, a power adjusting valve and a variable oil cylinder, the flow control valve is communicated with the variable oil cylinder and the load sensor port, and rod cavities of the first and second variable oil cylinder are respectively connected with a swash plate of the load sensitive variable pump. The invention has the advantages of simple structure, improved accuracy of operation, high control degree and reliability and is widely used for hydraulic multiple-way valve systems of the engineering machinery industry.

Description

Technical field: [0001] The invention relates to a load-sensitive pressure-compensated oil-return throttling control multi-way reversing valve system, in particular to the load-sensitive pressure-compensated oil-return throttling control multi-way reversing valve system equipment for an excavator. Background technique: [0002] At present, the flow distribution control of the open hydraulic system mostly controls the oil inlet of the actuator, that is, throttling control and pressure compensation are added between the actuator and the outlet of the pump. Germany Rexroth's pressure- and flow-independent flow distribution multi-way valve system is a relatively advanced flow distribution system at present, even in the case of insufficient flow, it can be independent of load. But there is a problem with all oil inlet control valves: under the action of reverse load (that is, the driving direction of the actuator is the same as the direction of the load), although the compensator...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 王振华于良振张喜全王天雷张春光
Owner SHANDONG TAIFENG INTELLIGENT CONTROL CO LTD
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