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Electrohydraulic excitation controlling valve

An electro-hydraulic vibration excitation and valve control technology, which is applied in vibration testing, measuring devices, fluid pressure actuating devices, etc., can solve the problem that the working frequency of the electro-hydraulic servo vibration table is difficult to be further increased, and achieve the effect of increasing the excitation frequency.

Inactive Publication Date: 2008-05-21
ZHEJIANG UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the frequency response of the electro-hydraulic servo valve is difficult to break through in a large range, it is difficult to further increase the operating frequency of the electro-hydraulic servo vibration table

Method used

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  • Electrohydraulic excitation controlling valve
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  • Electrohydraulic excitation controlling valve

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] 2-7, an electro-hydraulic vibration control valve includes a valve body 1. The valve body 1 is provided with an oil inlet 2 communicating with a high-pressure oil tank 2 and a first oil inlet communicating with a hydraulic cylinder. 3. The second oil inlet and outlet 4, the first oil outlet 5 and the second oil outlet 6 connected to the oil return tank, the electro-hydraulic vibration control valve also includes a valve core 7 and a valve sleeve 8. The valve The sleeve is nested on the inner wall of the valve body, the valve core passes through the valve sleeve, and the valve core is connected with a first servo motor for driving the valve core to rotate and a second servo motor for driving the valve core to move axially; At least four shoulders are equally spaced on the valve core, including a first shoulder 9, a second shoulder 10, a third shoulder 11, and a fourt...

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Abstract

An electro-hydraulic excitation control valve, comprising a valve body, the valve body is provided with an oil inlet connected to a high-pressure oil tank, a first oil inlet and outlet connected to a hydraulic cylinder, a second oil inlet and an outlet, and an oil return port. The first oil outlet and the second oil outlet connected to the oil tank. The electro-hydraulic vibration control valve also includes a valve core and a valve sleeve. The valve sleeve is nested in the inner wall of the valve body, and the valve core passes through the The valve sleeve, the spool is connected to the first servo motor and the second servo motor; at least four shoulders are equidistantly arranged on the spool, and at least two grooves are uniformly opened in the circumferential direction of each shoulder, The grooves on the front and rear adjacent shoulders are misaligned; a ring of valve sleeve windows matching each shoulder is uniformly opened in the circumferential direction of the valve sleeve, and the valve sleeve windows are at least four circles. The valve sleeve between the windows is provided with an auxiliary window, and an additional window is provided at the end of the valve sleeve close to the first valve sleeve window. The invention can greatly increase the electro-hydraulic excitation frequency.

Description

Technical field [0001] The invention relates to an electro-hydraulic excitation control valve. Background technique [0002] Vibration test, as a basic test of modern industry and an important means of product development, is widely used in many important engineering fields, such as road simulation tests of automobiles and mobile machinery; seismic fatigue tests of engineering materials, dams and high-rise buildings, etc. [0003] There are three main types of excitation methods: mechanical, electromagnetic and electro-hydraulic. Compared with the former two, electro-hydraulic excitation has the advantages of large excitation power, large thrust, and multi-point excitation. It is mainly used in Heavy load and high power occasions. The working principle of the existing electro-hydraulic excitation (as shown in Figure 1) is to control the hydraulic actuator ② (cylinder or motor) to make a reciprocating linear or torsional movement by inputting an excitation signal to the electro-hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02F15B13/044
Inventor 阮健李胜裴翔俞浙青朱发明
Owner ZHEJIANG UNIV OF TECH
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