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Revolving electrohydraulic serve rotatable in limited angles

An electro-hydraulic servo valve, limited angle technology, applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problems of affecting the control effect and the discontinuous opening of the valve port of the rotary valve, so as to achieve flexible control, Ease of manufacture and assembly and high reliability

Inactive Publication Date: 2007-11-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: since the stepper motor can only rotate a fixed angle at each step, and the step angle cannot be too small, the opening of the rotary valve port is discontinuous, which affects the control effect

Method used

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  • Revolving electrohydraulic serve rotatable in limited angles
  • Revolving electrohydraulic serve rotatable in limited angles
  • Revolving electrohydraulic serve rotatable in limited angles

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Experimental program
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Embodiment Construction

[0012] The present invention will be described in further detail below. Referring to Figures 1, 2 and 3, the limited-angle rotary electro-hydraulic servo valve of the present invention consists of a drive motor 1, a sealing ring 2, a valve core 3, an end cover 4, a sealing ring 5, a valve sleeve 6 and a valve body 7. The upper end surface of the valve body 7 has a cylindrical non-through inner cavity, and a tubular valve sleeve 6 is arranged in the inner cavity, which is closely matched with the inner cavity, and the height of the valve sleeve 6 is the same as the depth of the inner cavity. There are four special-shaped valve ports uniformly distributed along the circumference and with the same opening shape on the valve sleeve 6, wherein two valve ports symmetrical to the center of the circle are P ports, and the other two valve ports symmetrical to the center of the circle are T ports. Port P is the pressure oil port, and port T is the oil return port. There is a circular t...

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PUM

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Abstract

An electrohydraulic servo valve of finite angle rotary type is composed of driving motor, seal ring, rotating valve core, end cover, valve bush and valve body. It is featured as applying finite angle brushless servo motor with built in angular displacement transducer as driving motor, setting each of P opening and T opening on valve bush to be a horizontal drum type.

Description

technical field [0001] The invention belongs to the hydraulic servo control technology and relates to the improvement of a directly driven rotary servo valve. Background technique [0002] At present, the application field of the electro-hydraulic servo control system is getting wider and wider, and some special technical requirements are put forward for the electro-hydraulic servo valve: high frequency response, high reliability, resistance to oil pollution, simple structure, convenient use and maintenance and Low cost, etc., but the traditional electro-hydraulic servo valve has been difficult to meet these requirements, so the research and development of new electro-hydraulic servo valve has become a major problem in the field of fluid transmission control. With the research and development of drivers based on new functional materials, the development of mechanical manufacturing, design technology and microelectronics technology, many electro-hydraulic servo valves directl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/044
Inventor 焦宗夏李树立郭宏
Owner BEIHANG UNIV