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A valve high temperature fatigue testing machine

A fatigue testing machine and valve technology, which is applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., can solve problems such as engine performance impact, achieve long service life, high reliability, and easy replacement

Active Publication Date: 2018-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the valve train contributes little to the weight reduction of the entire vehicle, it can have a huge impact on the performance of the engine

Method used

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  • A valve high temperature fatigue testing machine
  • A valve high temperature fatigue testing machine
  • A valve high temperature fatigue testing machine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A valve high-temperature fatigue testing machine, including a valve seat ring 1, a valve 2, an impact loading device, a valve clamping device and a heating system for heating the end face of the valve, the valve seat ring is located above the impact end of the valve, and the impact loading device The device includes an impact frame 3 and an eccentric wheel 4 arranged on the impact frame, a push rod, a disc spring group 6, a drive motor 7, and pushes the valve to impact the valve seat ring while applying force to the valve seat ring through the impact end of the valve. The pressure loading rod 8, the drive motor drives the eccentric wheel to rotate, the lower end surface of the push rod is in contact with the eccentric wheel, the loading rod is arranged above the push rod, the disc spring group is installed between the push rod and the loading rod, the valve clamping device and The valve is connected, and the valve is arranged above the loading rod.

[0027] Preferably, ...

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Abstract

The invention discloses an air valve high temperature fatigue testing machine. The machine comprises an air valve seat ring, an air valve, an impact loading device, an air valve clamping device, and a heating system for heating the end face of air valve; the impact loading device comprises an impact rack and following components, which are arranged on the impact rack: an eccentric wheel, a push rod, a disc spring set, a driving motor, and a loading rod; the loading rod pushes the air valve to impact the air valve seat ring and at the same time applies pressure on the air valve seat ring through the impact head of the air valve, the driving motor drives the eccentric wheel to rotate, the lower end face contacts with the eccentric wheel, the loading rod is arranged above the push rod, the disc spring set is arranged between the push rod and the loading rod, the air valve clamping device is connected to the air valve, and the air vale is arranged above the loading rod. The small stress can be converted into large stress by the disc spring set, thus a large force can be applied on the impact head of the air valve, and the rapid fatigue experiment can be carried out. Moreover, the power of the driving motor can be largely reduced by the small angle lifting curve of the eccentric wheel.

Description

technical field [0001] The invention relates to an experimental testing device, in particular to a valve high-temperature fatigue testing machine. Background technique [0002] Valves, exhaust valves and valve seat rings are precision parts in the engine valve train. The valve head and valve seat ring cooperate to seal the cylinder and control the intake of fresh air and the discharge of exhaust gas. When the engine is running, the valve seat is subjected to thousands of alternating cycle impact loads per minute. Under the action of high temperature, incomplete combustion products are deposited on the valve cone surface, so the valve seat is subjected to mechanical impact. The combined effects of load, high temperature and combustion gas erosion will directly affect the fuel consumption, working performance, output power and service life of the engine. [0003] Empty valve is a special form of valve production. New high-speed and high-load engines are constantly emerging. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/307G01M13/00
CPCG01M13/00G01N3/307
Inventor 屈盛官赖福强王光宏和锐亮李小强
Owner SOUTH CHINA UNIV OF TECH
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