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Novel intelligent piezo-electricity type electrohydraulic servo valve

An electro-hydraulic servo valve, intelligent technology, applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problems of large volume, inability to meet the requirements of sensitivity and precision, and high price

Inactive Publication Date: 2008-12-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are relatively expensive, large volume, low control precision, and most of them can only work in the dynamic frequency domain below 300Hz, which can no longer meet the sensitivity and precision requirements of modern industry, national defense and other fields.

Method used

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  • Novel intelligent piezo-electricity type electrohydraulic servo valve
  • Novel intelligent piezo-electricity type electrohydraulic servo valve
  • Novel intelligent piezo-electricity type electrohydraulic servo valve

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Embodiment Construction

[0016] The present invention will be described in further detail below, see FIG. 1.

[0017] The novel intelligent piezoelectric electro-hydraulic servo valve of the present invention includes a shell composed of a left end cover 3, a valve body 7, a right end cover 23, a closed-loop piezoelectric ceramic driver seat 12 and a right end cover plate 22. The valve body 7 has a through valve cavity, a slide valve sleeve 18 is arranged in the valve cavity, and a valve core 17 is arranged in the through hole of the valve sleeve 18. The left end cover 3, the zero adjusting bolt 14, the sealing ring 4 and the valve sleeve adjusting medium pressure column 5 together cover the left end surface of the valve cavity. The right end cover 23 covers the right end surface of the valve cavity, and there are sealing rings 9 and 19 between the right end cover 23 and the right end surface of the valve cavity. The closed-loop piezoelectric ceramic driver seat 12 is fixed on the right end of the right e...

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Abstract

The invention pertains to a hydraulic servo-control technology, relating to an improvement on the operating principle of traditional hydraulic servo valves. The novel intelligent piezoelectric electro-hydraulic servo valve mainly comprises a closed-loop piezoelectric ceramic drive, a slide valve spool, a valve pocket, a left end cap and a right end cap, a device which prevents the rotation of the spool, a valve pocket centering piece and a piezoelectric ceramic drive seat. The closed-loop piezoelectric ceramic drive can export thrust force and pulling force in a high-frequency manner, and the sensor of closed-loop piezoelectric ceramic drive can detect the displacement of the high-frequency vibration output; the closed-loop piezoelectric ceramic drive is directly connected with the slide valve spool fixedly so as to drive the spool to make high-frequency reciprocating movements. The device which prevents the rotation of the spool can prevent the slide valve spool from rotation, and as a result, the piezoelectric ceramic drive is protected from damage due to the axial rotary force. The null position of the spool adopts the valve pocket to adjust the centering piece. The novel intelligent piezoelectric electro-hydraulic servo valve breaks the bottleneck that the bandwidths of traditional electro-hydraulic servo valves are relatively small, and the invention can operate in a high-frequency and high-precision manner; thereby, the high-frequency and high-precision performance of the novel intelligent piezoelectric ceramic material can be sufficiently applied to the field of hydraulic servo control.

Description

Technical field [0001] The invention belongs to hydraulic servo control technology and relates to the improvement of the principle of traditional hydraulic servo valve. Background technique [0002] Hydraulic servo control is a relatively new science and technology. It is not only a new branch in hydraulic technology, but also an important part of the control field. At the end of 1940, electro-hydraulic servo systems first appeared on airplanes. Subsequently, due to the advantages of fast response, light weight, small size and high rigidity of load resistance, electro-hydraulic servo control received special attention, which made it widely used in construction machinery, lifting and transportation machinery, mining machinery, and construction machinery. , Agricultural machinery, metallurgical machinery, light industry machinery, automobile industry, intelligent machinery, national defense industry, etc. Especially in the application of the defense industry, mainly used in anti-ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/044
Inventor 焦宗夏曹锋郑俊麟张睿
Owner BEIHANG UNIV
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