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Air valve-valve seat friction wear testing machine and use method thereof

A technology of friction and wear test and testing machine, which is applied in the direction of testing wear resistance, weather resistance/light resistance/corrosion resistance, instruments, etc. It can solve the problems of lack of fretting rotation, lack of sulfur-containing corrosion atmosphere simulation factors, etc., to avoid high temperature Deformation, improve reliability and stability, avoid the effects of eccentric wear

Inactive Publication Date: 2021-11-16
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing valve-seat friction and wear testing machines proposed above can only simulate the impact motion of the valve, lacking fretting rotation; most testing machines only simulate high temperature, and lack the technology of simulating factors of sulfur-containing corrosive atmosphere problem, and provide a valve-valve seat friction and wear testing machine and its use

Method used

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  • Air valve-valve seat friction wear testing machine and use method thereof
  • Air valve-valve seat friction wear testing machine and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 1 and figure 2 As shown, a new air valve-valve seat friction and wear testing machine is composed of a support platform, a speed regulating motor 1, a cam 2, a gap adjusting gasket 3, a spring 4, a rotating mechanism 5, a valve seat 6, an air valve 7, a cooling Water chamber 8, heating device 9, spring guide block 10, air valve guide pipe 11, valve seat replacement tooling 12, exhaust pipe 13, thermocouple 14 and intake pipe 15, speed regulating motor 1, cam 2, gap adjustment pad Sheet 3, spring 4 and spring guide block 10 are all located above the support platform, valve seat 6, cooling water chamber 8, heating device 9, air valve guide pipe 11, valve seat replacement tooling 12, exhaust pipe 13, thermocouple 14 and The intake pipes 15 are all located below the supporting platform, the rotating mechanism 5 is located between the spring 4 and the air valve guide pipe 11, and the air valve 7 runs through the upper and lower sides of the supporting platfo...

Embodiment 2

[0060] On the basis of embodiment 1, the present invention also provides a kind of use method of valve-valve seat friction and wear testing machine, comprises the following steps:

[0061] 1. Install the valve seat first, put the valve seat 6 into figure 1 In the position shown, the positioning gasket is installed so that the valve seat 6 can be fixed at the center of the testing machine, reducing the probability of eccentric wear.

[0062] 2. Then install the gas valve, insert the gas valve 7 from below (the valve stem of the gas valve 7 passes through the valve seat 6, the gas valve guide tube 11, the rotating mechanism 5, and the spring 4 from the heating furnace chamber upwards), so that it The valve cone surface is in close contact with the valve seat 6, and the valve stem is exposed above, and the snap ring is installed on both sides of the top of the valve stem, and the spring 4 is installed with a special tool, which uses a valve spring disassembly tool.

[0063] 3. Fin...

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Abstract

The invention provides an air valve-valve seat friction wear testing machine and a use method, and the testing machine comprises a supporting platform, and a driving reset device, a rotating mechanism, an air valve, a valve seat tightly attached to the conical surface of the air valve, a heating device, a corrosion system and a cooling system which are installed on the supporting platform, the valve seat is mounted at the central position of the testing machine through the positioning gasket; the driving reset device is connected with the air valve and used for achieving impact motion of reciprocating opening and closing of the air valve, the rotating mechanism is connected with the air valve and used for achieving micro-motion rotation of the air valve, and friction motion is conducted between the air valve and the valve seat in the moving process of the air valve. The heating device is used for providing a high-temperature environment, the corrosion system is used for providing a corrosion atmosphere environment, and the cooling system is used for cooling the testing machine. According to the invention, the impact motion and micro rotation of the air valve can be simulated, so that the air valve has micro rotation in the impact motion, and the motion form of a friction pair can be better simulated; a high-temperature and sulfur-containing corrosive atmosphere can be created, and the working condition is closer to that of a real machine.

Description

technical field [0001] The invention relates to the technical field of friction and wear testing, in particular to an air valve-valve seat friction and wear testing machine and a method for using it. Background technique [0002] The gas valve-valve seat is one of the friction pairs with relatively harsh working environment in the internal combustion engine. It is directly in contact with the high-temperature and high-pressure gas, and it also bears the corrosion and wear caused by the gas during the continuous impact movement. Especially the exhaust valve, the working condition is the worst, and it is the top priority of maintenance in the actual use of the internal combustion engine. In order to improve the friction and wear performance of the air valve-valve seat, many manufacturers and researchers have carried out research and development on materials and processing techniques. Because the bench test is time-consuming and costly, it is particularly necessary to develop ...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N17/00
CPCG01N3/56G01N17/00
Inventor 徐久军李承娣刘耕硕朱新河陈文滨黄若轩王静思强慧
Owner DALIAN MARITIME UNIVERSITY