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Load-sensitive valve and load-sensitive hydraulic system

A technology of load-sensing valves and load-sensing pumps, which is applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., can solve problems such as energy waste, reduce throttling loss, avoid impact, and achieve versatility strong effect

Active Publication Date: 2016-01-06
徐州中新机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the existence of the pressure compensation valve has caused a waste of energy

Method used

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  • Load-sensitive valve and load-sensitive hydraulic system
  • Load-sensitive valve and load-sensitive hydraulic system
  • Load-sensitive valve and load-sensitive hydraulic system

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] Such as figure 1 As shown, a load sensing valve 12, the load sensing valve 12 includes a proportional reversing valve 1, a pressure compensation valve 2, an enabling reversing valve 3,

[0018] The proportional reversing valve 1 is an electromagnetic proportional reversing valve, on which there is a pressure port 4 behind the valve. When the proportional reversing valve 1 works in the left or right position, its oil inlet is connected with the pressure port 4 behind the valve. , when the proportional reversing valve 1 is in the middle position, the pressure port 4 behind the valve is connected with its oil return port; the two working oil ports of the proportional reversing valve 1 are used as the two working oil ports of the load sensing valve 12; the proportional reversing valve The post-valve pressure port 4 of the directional valve 1 is used as the pressure dete...

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Abstract

A load-sensitive valve comprises a proportional reversing valve, a pressure compensation valve and an enable reversing valve. An oil outlet of the pressure compensation valve is communicated with an oil inlet of the proportional reversing valve, a spring valve of the pressure compensation valve is communicated with a downstream pressure opening of the proportional reversing valve through a downstream pressure detection oil way, and a throttler is arranged on a load feedback oil way of the pressure compensation valve. An oil inlet of the enable reversing valve is communicated with the load feedback oil way of the pressure compensation valve. A single-load sensitive hydraulic system is provided. An oil inlet of the load-sensitive valve is communicated with an oil tank through a load-sensitive pump, and an electronic control opening of the load-sensitive valve is electrically connected with a controller. According to a multi-load sensitive hydraulic system, the oil inlet of the load-sensitive valve in each load execution unit is communicated with the oil tank through the load-sensitive pump, the electronic control opening of the load-sensitive valve in each load execution unit is electrically connected with the controller, and pressure detection openings of the load-sensitive valves are communicated through shuttle valves. Energy losses can be reduced under the work condition that only one execution mechanism works in a system.

Description

technical field [0001] The invention relates to the technical field of hydraulic system control, in particular to a load sensitive valve and a load sensitive hydraulic system. Background technique [0002] A conventional load sensing valve is mainly composed of a proportional directional valve and a pressure compensating valve. The proportional reversing valve can control the oil direction and the opening of the valve port according to the electrical signal of the controller. The essence of the pressure compensation valve is a differential pressure reducing valve. There is a spring on the left side of the pressure compensation valve, which also acts on the load pressure signal P2 after the valve of the proportional directional valve fed back through the main working oil circuit of the proportional directional valve in the oil circuit, and acts on the right side to feed back through the load feedback oil circuit Pressure signal P1 upstream of the proportional directional va...

Claims

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Application Information

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IPC IPC(8): F15B13/02F15B11/08F15B21/08
Inventor 李建松张文婷
Owner 徐州中新机械科技有限公司
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