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Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode

A multi-way control valve and pressure compensation technology, which is applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., to achieve the effects of small pressure drop, good effect, and improved operating performance

Active Publication Date: 2011-06-15
江苏国瑞液压机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no multi-way valve that can take into account the advantages of both types of compensation without using complicated connections

Method used

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  • Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode
  • Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode
  • Electrohydraulic ratio multi-channel control valve with convertible pressure compensation mode

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Experimental program
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Effect test

Embodiment Construction

[0031] exist figure 1 , 2 , 3, the valve body (1) is cast with an oil inlet passage (2) and an annular oil passage (5) to connect the offset oil passage (19) of the compensator and the oil inlet (6) of the compensator. The pressure oil from the oil pump enters the compensator oil inlet (6) through the oil inlet passage (2), the main valve core (4) to the annular oil passage (5) and then to the compensator offset oil passage (19). The throttle groove (7) and the groove (8) of the device spool to the trapezoidal bridge road oil passage (16), enter the working oil cylinder through the throttle port (3) of the main spool (4). There are two throttling ports (3) of the spool (4), and only one throttling port is opened after reversing. The throttle groove (7) and the groove (8) of the compensator spool form a throttle port. The pressure oil at the compensator inlet enters the bottom of the compensator spool (20) through the damping hole (10). The upper end of the compensator spoo...

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Abstract

The invention relates to an electrohydraulic ratio multi-channel control valve with a convertible pressure compensation mode, wherein the electrohydraulic ratio multi-channel control valve provided by the invention is especially suitable for a multi-channel liquid control valve capable of converting the pressure compensation modes in the same valve body, belonging to the technical field of hydraulic control. The technical scheme adopted by the invention is as follows: in the electrohydraulic ratio multi-channel control valve with the convertible pressure compensation mode, a valve body is provided with a valve hole of a main valve and a compensator valve hole which are shared by two pressure compensation modes; through an offset oil channel, the oil inlet of a compensator is connected with oil channels which are communicated through the main valve; and a matched valve plug of the main valve can be placed in the same valve hole of the main valve, and a matched front compensator and a rear compensator can be placed in the same compensator valve hole. The electrohydraulic ratio multi-channel control valve with the convertible pressure compensation mode has the advantages of good pressure compensation effect, low pressure drop, and the like.

Description

technical field [0001] The invention relates to an electro-hydraulic proportional multi-channel control valve, which is especially suitable for a multi-channel liquid control valve in which the pressure compensation mode can be changed in the same valve body, and belongs to the technical field of hydraulic control. Background technique [0002] In the hydraulic system of mobile machinery, in order to overcome the influence of load pressure change on the flow rate, a pressure compensator is often used to keep the pressure drop at a constant value. The commonly used pressure compensation method is the front type, that is, the pressure compensator is placed in front of the main valve core to control the pressure drop of the oil passing through the main valve core, so that the pressure drop tends to a constant value. When the main spool is opened to a certain extent, no matter how the load pressure of the circuit changes, the control flow of the circuit remains unchanged. Howev...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 罗年柱
Owner 江苏国瑞液压机械有限公司
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