Abrasion test method of air valve and seat ring novel abrasion test system of valve and seat ring

Abstract

The invention relates to a quick abrasion testing system in the field of power machinery technique, aiming at providing a novel abrasion testing system used for a valve and a seat ring used for an internal combustion machine; the system comprises a cylinder cover, a valve, a valve spring and a valve seat ring; the valve is positioned on the cylinder cover; the valve seat ring is positioned between the valve and the cylinder cover; the valve rod of the valve passes through the cylinder cover; the end of the valve rod fixes the spring seat ring by a valve lock lamp; one end of the valve spring is supported on the cylinder cover and the other end thereof pushes against the spring seat ring; the system also comprises an electromagnet which is arranged on the cylinder cover and positioned at the lower part of the spring seat ring; the quick abrasion testing system can achieve extremely high impact frequency, and shorten the testing time; the dripping speed of the valve can be jointly determined by two different sensors and the accuracy of the test is improved; and the temperature of the cylinder cover is kept at the temperature of the cylinder cover when the internal combustion machine works normally, thus ensuring the reliability of the testing conclusion. The parts are few, the structure is simple and the manufacture cost is low.

Description

technical field [0001] The invention relates to a rapid wear test system in the technical field of power machinery, more specifically, the invention relates to a novel wear test system for valves and seat rings used in internal combustion engines. Background technique [0002] The valve and the seat ring are one of the important friction pairs of the engine. They work under the condition of high temperature and impact, and at the same time, there is exhaust gas corrosion. The working conditions are harsh, and they are prone to wear and failure. The operating life and reliability of valves and seat rings determine the working performance, service life and output power of the engine to some extent. Especially in recent years, as the power and reliability requirements of engines, especially diesel engines, have increased, the requirements for the friction pair of valves and seat rings have also increased accordingly. In recent years, with the deepening of research on the wear ...

AI Technical Summary

Problems solved by technology

[0003] The traditional test and evaluation methods of valves and seat rings at home and abroad are usually carried out on the complete engine, which not only has a long cycle, high cost, and manpower loss, but also is greatly affected by environmental factors, which is not convenient for data collation and regularity analysis. Exploring, the traditional valve seating speed limit is often limited by experience

In addition to this test evaluation method, some scholars and manufacturers use the original cam drive or cam-rocker mechanism to drive the valve for test and evaluation, but this will virtually produce an additional friction pair or cam-valve pair of cam and valve seat ring. The new wear between the rocker arm and the rocker arm-valve seat ring two pairs of friction pairs, while evaluating one pair of friction pairs, sacrifices the other pair or two pairs of friction pairs, which will also affect the accuracy of the test results and evaluation methods and have some detrimental effects on the accuracy

And due to the limitation of the cam profile, even through the adjustment of the valve clearance, the seating speed of the valve is relatively limited, which is not conducive to the progress and cycle control of the test

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