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Hydraulically-controlled proportional valve

A proportional valve, hydraulic control technology, applied in the field of hydraulic components

Inactive Publication Date: 2014-04-16
江苏阜华阀门有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no electro-hydraulic proportional valve product suitable for the above purpose on the market

Method used

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  • Hydraulically-controlled proportional valve

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Embodiment Construction

[0016] The hydraulic control proportional valve such as figure 1 , including screw plug 25, valve body 26, centering spring 27, valve core 28, valve sleeve 29, plunger 30, screw 31, adjustment spring 32, spring sleeve 33, sealing sleeve 34, push rod 35 and adjustment screw 36 . The above-mentioned valve body is provided with a valve hole and five sinking grooves. The sinking grooves are connected with the control oil port X, oil inlet P, oil outlet A, oil return port T and valve port Y from left to right through the oil passage. Connected to form five oil chambers, which are control oil chamber, oil inlet chamber, oil outlet chamber, oil return chamber and spring chamber in turn. Wherein, the oil outlet A communicates with the valve port Y through another oil passage. The above valve core 28 has two shoulder structures, in which both ends of the right shoulder are chamfered, and the remaining complete cylindrical surface is slightly wider than the corresponding undercut groo...

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Abstract

The invention discloses a hydraulically-controlled proportional valve for a hydraulic power-assisted system of an electric car, belonging to the technical field of a hydraulic element. The hydraulically-controlled proportional valve comprises a valve body, a centralizing spring, a valve core, a valve sleeve, a plunger, an adjusting spring, an adjusting screw and the like. Five undercutting grooves are formed in a valve hole and are respectively communicated with oil ports X, P, A, T and Y. The valve core is provided with two shoulders, two throttling edges are formed by the two end surfaces of the right shoulder and the undercutting grooves and are used for respectively controlling the damping from the oil inlet P to the oil outlet A and the damping from the oil outlet A to the oil return port T. When the oil port X has no pressure, the valve core is at zero position under the action of the spring, and the oil outlet A has no pressure. When the oil port X has input pressure, the valve core moves rightwards, the P-A throttling edge is opened, and the oil outlet A has pressure output. The spring is soft, therefore, the product of oil pressure of the oil port X multiplied the area of the left end of the valve core is controlled to be approximately equal to the product of the oil pressure of the oil outlet A multiplied by the end area of the plunger, namely, the ratio of output oil pressure to input oil pressure is approximately the ratio of the section area of the plunger to the section area of the valve core.

Description

technical field [0001] The invention relates to a hydraulic control proportional valve, which belongs to the technical field of hydraulic components. Background technique [0002] The hydraulically controlled proportional valve was invented to solve the problem of hydraulically controlled pump / motor displacement control when studying the hydraulically controlled pump / motor booster system of electric vehicles. In recent years, in order to save energy and protect the environment, electric vehicles have attracted much attention as the main technical solution. The main technical obstacle to the development of electric vehicles is power storage battery technology. Capacity is the most important performance indicator of a battery. The capacity of a single battery is not a fixed number, it is related to the usage of the battery, especially the charge and discharge rate. Excessive charge and discharge rate will significantly reduce the battery capacity and cycle life. Therefore, ...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 吕云嵩王玉容郭均政邹政耀施明松
Owner 江苏阜华阀门有限公司
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