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Rotating servo valve capable of realizing continuously and steplessly adjustable flow rate

An adjustable, servo valve technology, applied in the field of rotary servo valves, can solve problems such as different valves, reduce manufacturing difficulty, improve dynamic load performance, and compensate for radial unbalanced forces

Active Publication Date: 2015-02-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a servo valve with continuously variable rated flow rate to solve the problem that different amplitude loading requires different valves in the dynamic triaxial tester. At the same time, it has simple structure, strong anti-pollution ability, and no zero drift phenomenon. , easy to process, use and maintain

Method used

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  • Rotating servo valve capable of realizing continuously and steplessly adjustable flow rate
  • Rotating servo valve capable of realizing continuously and steplessly adjustable flow rate
  • Rotating servo valve capable of realizing continuously and steplessly adjustable flow rate

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Embodiment Construction

[0020] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0021] as attached Figure 1~6 As shown, the return spring 2 keeps the spool 12 at zero position, and the angular displacement sensor 3 measures the size of the rotation angle to realize closed-loop control. The 5 shafts of the electro-mechanical conversion device are directly connected with the valve core 12 through the elastic coupling 7, so the dynamic performance is better.

[0022] When the rotary valve is working, the on-off condition of the oil circuit can be checked by the attached Figure 5 , 6 illustrate. as attached Figure 6 As shown, when the spool 12 is at the zero position, the two pairs of rectangular valve ports, the low-pressure valve port a and the high-pressure valve port b, are all closed. At this time, the left and right working oil ports A and B of the rotary valve have no oil flow. When ...

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Abstract

The invention relates to a rotating servo valve capable of realizing the continuously and steplessly adjustable flow rate, and belongs to the technical field of a hydraulic servo valve. The rotating servo valve is characterized in that the axial position of a valve core is regulated through rotating a spiral micrometer device connected with the valve core for changing the rated flow rate of the servo valve, four rectangular grooves are correspondingly formed in the valve core and a valve sleeve, and when the valve core and the valve sleeve relatively rotate, the rectangular grooves are mutually communicated or sealed for controlling the output flow rate, so the servo valve has the four-way function. The rotating servo valve has the effects and advantages that the valve core and the valve sleeve relatively rotate, the friction force is small, the anti-pollution capability is high, the zero-opening characteristics are realized, the dynamic performance is high, the structure is compact, the flow rate is high, the radial stress is balanced, and the manufacture difficulty is low.

Description

technical field [0001] The invention belongs to the technical field of hydraulic servo valves and relates to a servo valve, in particular to a rotary servo valve which can continuously and steplessly change the flow gain and realize different rated flow outputs. Background technique [0002] The dynamic triaxial tester is often used to test the strength and deformation characteristics of soil. This instrument is widely used and can be used to test various parameters. In order to study the deformation characteristics of soil samples in the test, it is necessary to load forces with different amplitudes and observe the relationship between stress and strain. At present, the domestic dynamic triaxial tester generally realizes the force loading through the hydraulic servo system, and the amplitude of the control force is realized by the servo valve. Because the composition of the test soil samples varies greatly, the amplitude of the test loading varies. For the soft soil sampl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/085
Inventor 桑勇王晓邹德高
Owner DALIAN UNIV OF TECH
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