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Steering preference type flux amplification valve

A flow amplification and priority valve technology, which is applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of complex structure and high price, and achieve reliable operation, suppress cavitation, and stop the process smoothly Effect

Inactive Publication Date: 2008-09-03
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign companies such as Kawasaki Heavy Industries, DANFOSS, Carter and other companies have developed some flow amplifying valves with better performance and priority functions, but their structures are more complicated and expensive

Method used

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  • Steering preference type flux amplification valve
  • Steering preference type flux amplification valve
  • Steering preference type flux amplification valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0007] Such as figure 1 , 2 , 3, and 4, the steering priority flow amplifying valve is provided with oil port T, oil ports A and B, oil ports L and R connected to the hydraulic proportional directional control valve 9, and also has oil ports Port Pp and oil port P2, the input port of shuttle valve 2 is connected with oil port A and B respectively, the output port of shuttle valve 2 is connected with oil port PAB of hydraulic proportional reversing valve 9, and its priority valve 4 is connected with The oil port P of the hydraulic proportional reversing valve 9 is connected, the first damper 3 is arranged on the priority valve 4, the priority valve 4 is also connected with the oil port P2 through the check valve 8, and the spring chamber of the priority valve 4 passes through the second The damper 5 is connected to the oil port PC of the hydraulic proportional directional valve 9, the inlet of the safety valve 6 is connected to the oil port PC of the hydraulic proportional dir...

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Abstract

The present invention provides a steering preferential type amplificative valve, on which are oil port T, A and B, oil port L and R connected with hydraulic motive proportion reversing valve (9), the oil input ports of a shuttle valve (2) are connected with oil port A and B respectively, the oil output port of the shuttle valve (2) are connected with oil port PAB of the hydraulic motive proportion reversing valve (9), the priority valve (4) is connected with oil port P of the hydraulic motive proportion reversing valve (9) and also connected with oil port P2 by check valve (8) whose spring is connected with oil port PC of the hydraulic motive proportion reversing valve (9) by the second damper (5), the inlet of a safety valve (6) is connected with oil port PC of the hydraulic motive proportion reversing valve (9), the inlet port and control port of order valve (7) are connected with front and rear end of check valve respectively. The steering preferential type amplificative valve of present invention has merits of simple structure, energy saving and damping function, can be used widely in hydraulic system of project machine.

Description

technical field [0001] The invention relates to a hydraulic flow amplifying valve, in particular to a steering priority flow amplifying valve. Background technique [0002] The hydraulic flow amplifying valve is widely used in the steering hydraulic system of large and medium-sized construction machinery. Its function is to amplify the flow and hydraulic power of the pilot control flow output by the steering gear according to a certain amplification factor, and control the movement of the steering hydraulic actuator. The construction machinery hydraulic system mainly includes the steering system and the working system. The action of the steering system is the action that needs to be guaranteed first in the construction machinery system. At present, the steering system using the non-steering priority flow amplifying valve has the problem of steering pump displacement configuration. When the displacement of the steering pump is small, there is a problem of inconsistent steerin...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 冀宏谭正生魏列江张玮
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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