A test method for oil film thickness of axial rubber-plastic seal

Abstract

A method for testing the thickness of an axial rubber-plastic seal oil film, characterized in that it consists of an axial rubber-plastic seal, a magnetic fluid, a sensor head, an analog seal pair, and a signal extraction and processing circuit, and the gap between the axial rubber-plastic seal and the sensor head Filled with magnetic fluid, the sensor head is installed in the analog sealing pair, the two wires of the sensor head are connected to the signal extraction and processing circuit, and the signal extraction and processing circuit consists of an oscillation circuit, a detection circuit, a filter circuit, a linear compensation circuit, and a normalization circuit. The processing circuit is composed; the test method consists of four steps. The invention can be used to accurately measure the oil film thickness of rubber and plastic seals, has the advantages of simple structure, high measurement accuracy, high linearity and good repeatability, and can be used in the fields of scientific research of rubber and plastic seals, working state monitoring and the like.

Description

technical field [0001] The invention relates to the field of oil film thickness measurement. A method for measuring the thickness of the oil film of an axial rubber and plastic seal can be accurately measured for the thickness of the oil film of the rubber and plastic seal. The method has the advantages of simple structure, high measurement accuracy, high linearity and good repeatability. And other advantages, can be used in rubber and plastic seal scientific research, working condition monitoring and other fields. Background technique [0002] In the hydraulic system, the rubber-plastic seal is the main dynamic sealing form. There is relative rotation or movement between the rubber-plastic seal and the parts. The thickness of the oil film in the middle is an important factor to determine whether the seal is reliable. If the thickness of the oil film is too thick, There will be running, emitting, dripping and leaking. If the thickness of the oil film is too thin, severe heat...

AI Technical Summary

Problems solved by technology

[0002] In the hydraulic system, the rubber-plastic seal is the main dynamic sealing form. There is relative rotation or movement between the rubber-plastic seal and the parts. The thickness of the oil film in the middle is an important factor to determine whether the seal is reliable. If the thickness of the oil film is too thick, There will be running, emitting, dripping and leaking. If the thickness of the oil film is too thin, severe heating will occur, and the heat cannot be diffused, resulting in high temperature of the seal and affecting the life of the seal. Therefore, to determine a reasonable oil film thickness is to conduct scientific research on the seal and design the seal. Important basis for parameters such as shape accuracy and reliability of parts

Patent 201910194770.7 invented a method and device for measuring lubricating oil film thickness based on TDLAS technology, but its test object is the thickness of the oil film between metal parts; Thrust bearings, that is to say, these patents cannot be used in rubber and plastic seals due to the particularity of rubber and plastic seals, and there is no device on the market that can test the oil film thickness of rubber and plastic seals

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