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Servo valve of piezoelectric ceramic

A piezoelectric ceramic and servo valve technology, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problem of small output flow of servo valve, small displacement of servo valve spool, and no bilateral amplification of spool. and other problems, to achieve the effect of large output flow, avoiding friction and clearance

Inactive Publication Date: 2008-07-30
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but, figure 1 The disadvantage of the principle structure is: since the piezoelectric ceramic driver directly drives the movement of the spool, the displacement of the spool of the servo valve is small, so the output flow of the servo valve is small; figure 2 Although a sliding valve spool displacement amplification mechanism was proposed, it did not say whether to use bilateral amplification or unilateral amplification for the spool displacement, and did not propose to use a displacement sensor to control the displacement of the spool

Method used

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  • Servo valve of piezoelectric ceramic
  • Servo valve of piezoelectric ceramic
  • Servo valve of piezoelectric ceramic

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Embodiment Construction

[0012] The present invention will be described in further detail below. Referring to FIG. 3 , the piezoelectric ceramic servo valve of the present invention includes a casing composed of a left end cap 10 , a valve seat 12 and a right end cap 25 . The valve seat 12 has a through valve cavity, and the valve cavity has a spool valve core 13 . The left end cover 10 covers the left end face of the valve cavity, and there is a sealing ring 11 between the left end cover 10 and the left end face of the valve cavity. The right end cover 25 covers the right end face of the valve cavity, and there is a sealing ring 15 between the right end cover 25 and the right end face of the valve cavity. The left end cap 10 and the right end cap 25 have holes coaxial with the axis of the valve cavity, and the left and right ends of the valve core 13 protrude from the holes on the left end cap 10 and the right end cap 25 respectively. There is a valve hole 23 on the valve seat 12 which communicates...

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Abstract

A piezoelectric ceramic servo valve consists of a servo valve including slide valve core, piezoelectric ceramic driver and displacement transducer. It features that the valve core is driven to move after piezoelectric driver displacement is amplified through lever formed by cantilever and hinge seat.

Description

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

Claims

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Application Information

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