Method for analyzing ability of diamond-like carbon film to seal hydraulic servo actuator of aircraft

A diamond-like film and hydraulic servo technology, applied in the direction of material analysis, material excitation analysis, material analysis using radiation diffraction, etc., can solve the problems of abrasive wear at the extension end of the piston rod, reduce the friction coefficient data, and improve the surface hardness , the effect of improving the toughness of the film

Inactive Publication Date: 2017-02-22
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0010] When the actuator is working, the piston rod and the sealing ring reciprocate at high speed, and the protruding end of the piston rod is prone to abrasive wear

Method used

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  • Method for analyzing ability of diamond-like carbon film to seal hydraulic servo actuator of aircraft
  • Method for analyzing ability of diamond-like carbon film to seal hydraulic servo actuator of aircraft
  • Method for analyzing ability of diamond-like carbon film to seal hydraulic servo actuator of aircraft

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing:

[0041] 1. Preparation of diamond-like film:

[0042] The base material is 440A stainless steel as the material of the actuator piston rod, and 30 sheets of 10×10 cm are made of 440A stainless steel base material. The base material is ultrasonically cleaned in acetone solution for 20 minutes, dried with nitrogen, and placed in a vacuum. room to be deposited.

[0043] Pump the background vacuum to 1.8×10 -4 After Pa, use 5keV / 20mA high-energy ion source Ar + Bombard the surface of the sheet for 10 minutes; start the sputtering silver target ion source, the voltage and ion beam current are 1200eV / 35mA, and deposit an Ag spacer layer with a thickness of about 0.2 μm on the substrate. Then start the sputtering carbon target ion source to deposit a layer of Ag-DLC film with a thickness of 1 μm on the substrate; the ion source voltage and ion beam current of the sputtering carb...

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Abstract

The invention discloses a method for analyzing the ability of a diamond-like carbon film to seal a hydraulic servo actuator of an aircraft, and belongs to the technical field of hydraulic servo actuators of aircraft. In order to improve the defect in the ability to seal an aircraft hydraulic servo actuator, the invention is acquired by the applicant through mass experiments based on the analysis of actuator failure, a plurality of diamond-like carbon films different in silver content are prepared by using a multifunctional ion beam deposition system, microstructure and mechanical property changes of various diamond-like carbon films are analyzed by using an X-ray diffractometer, an energy dispersive spectrometer, Raman spectroscopy, a nano indenter, a three-dimensional white light interferometry profilometer, and a high-speed reciprocating friction-wear tester, the influence of carbon bonds and internal stress upon the mechanical properties of a film are described systematically, and theoretical and practical blanks are filled.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for analyzing the sealing performance of a diamond-like film on a hydraulic servo actuator of an aircraft. Background technique [0002] The hydraulic servo actuator is the control center of the aircraft, and its sealing performance directly affects the sensitivity and accuracy of the aircraft's flight attitude. The piston rod is the driving part of the actuator. Under high temperature and high pressure conditions, poor sealing will cause oil leakage, and abrasive particles will enter between the sealing ring and the piston rod, which will also cause abrasive wear and reduce the working efficiency of the actuator. reduce. [0003] The long-term wear and tear of the aircraft may easily cause oil leakage, affect the efficiency of the flight control system, and even endanger the normal work. The research results show that the surface properties of the piston...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N3/40G01N23/20G01N21/65G01B11/06C23C14/02C23C14/16C23C14/06
CPCG01N3/565C23C14/022C23C14/025C23C14/0605C23C14/165C23C14/34G01B11/06G01N3/40G01N21/65G01N23/20G01N2203/0005G01N2203/0078G01N2203/0282G01N2203/0298G01N2223/0563
Inventor 于翔疏文张志强任毅张磊
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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