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Positioning structure of electro-hydraulic servo valve force feedback assembly

An electro-hydraulic servo valve and positioning structure technology, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problems of difficult processing and high assembly risks.

Inactive Publication Date: 2017-12-19
XIAN FLIGHT SELF CONTROL INST OF AVIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of difficult processing and high assembly risk caused by traditional positioning methods, the present invention proposes a positioning structure for electro-hydraulic servo valve force feedback components

Method used

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  • Positioning structure of electro-hydraulic servo valve force feedback assembly

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Embodiment Construction

[0021] A positioning structure of an electro-hydraulic servo valve force feedback assembly in an embodiment of the present invention includes a guide sleeve 1, a locking screw I4, and a locking screw II5, wherein the guide sleeve 1 is arranged inside the valve core 6, It is a cylindrical structure with an axial through hole in the center, and the feedback ball 3 of the feedback assembly 2 is set in the through hole in the guide sleeve 1 . And cooperate with it; the side of the lower end of the guide sleeve 1 in contact with the locking screw I4 is provided with a round hole in the direction perpendicular to the axial direction. The end of the locking screw I4 is a spherical structure, passing through the round hole, and The inner wall of the guide sleeve 1 forms surface contact. The side of the lower end of the guide sleeve 1 in contact with the locking screw II5 is provided with a plane groove perpendicular to the axial direction, and the end of the locking screw II5 is a pla...

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Abstract

The invention discloses a positioning structure of an electro-hydraulic servo valve force feedback assembly. The positioning structure comprises a guiding sleeve (1), a lock screw I (4) and a lock screw II (5), wherein the guiding sleeve (1) is arranged in a valve element (6), and a small feedback ball (3) of the feedback assembly (2) is arranged in the guiding sleeve (1) in a clearance fit mode; and the lock screw I (4) and the lock screw II (5) are arranged in the valve element (6) and clamp the guiding sleeve (6) from the two sides in a surface contact mode. According to the positioning structure of the electro-hydraulic servo valve force feedback assembly, the small feedback ball is positioned in an inner hole of the guiding sleeve, the guiding sleeve is positioned in the middle of the valve element through the two lock screws, a valve element annular groove structure which is difficult to machine is omitted, and the positioning precision of the small feedback ball can be easily guaranteed. The positioning portion of the guiding sleeve is a plane, positioning is reliable, and the assembling difficulty is lowered. Meanwhile, the fit clearance between the guiding sleeve and the small ball can easily guarantee the precision and lower system damping, and thus the dynamic and static properties of an electro-hydraulic servo valve can be improved.

Description

1. Technical field [0001] The invention belongs to hydraulic servo control technology, in particular to a positioning structure of an electro-hydraulic servo valve force feedback component. 2. Background technology [0002] Force feedback electro-hydraulic servo valves are widely used in aviation, aerospace, heavy machinery, equipment manufacturing and other fields. The positioning of the feedback component on the spool has an important impact on the performance of the force feedback electro-hydraulic servo valve. The typical positioning method of the force feedback component on the spool is mainly through the positioning of the spool ring groove or screw locking. Since the machining accuracy of the spool ring groove is difficult to guarantee accurately, the locking screw needs to be adjusted repeatedly during the debugging process, and its tightening torque is difficult to accurately control, the efficiency is low, and there is a risk of wearing the surface of the ball. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 翟晓燕刘莎牛世勇
Owner XIAN FLIGHT SELF CONTROL INST OF AVIC
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