Gas distribution mechanism double friction pair composite simulation experiment system

Abstract

The invention discloses a gas distribution mechanism double friction pair composite simulation experiment system. The gas distribution mechanism double friction pair composite simulation experiment system comprises a motor, a belt, a fixed shaft base, a camshaft, a cam, a roller, a tappet body, a valve push rod, a valve, a cylinder head, a valve seat ring and a heating coil. The cam is in interference fit with the camshaft, the roller is rotatably connected with the upper end of the tappet body through a pin, the upper end of the valve push rod is connected with the tappet body, the lower endof the valve push rod is connected with the valve, and the valve push rod is sleeved by a valve spring. The cam and the roller form a higher pair friction pair under the action of the elastic restoring force of the valve spring, the cylinder head is provided with a valve guide pipe, the valve push rod traverses the valve guide pipe, the valve seat ring is arranged on the lower end of the valve guide pipe, the valve and the valve seat ring form an impact wear kinematic pair under the action of the elastic restoring force of the valve spring, the heating coil is arranged in the cylinder head under the valve, and wear tests of two friction pairs are achieved at the same time. The gas distribution mechanism double friction pair composite simulation experiment system is stable and reliable in structure and high in efficiency, simulation approaches actual working conditions, and the experiment data is powerful and reliable.

Description

technical field [0001] The invention belongs to the technical field of a comprehensive test device for the movement and stress state of multiple pairs of friction pairs, in particular, the invention relates to a compound simulation experiment system for a double friction pair of a valve mechanism. Background technique [0002] In recent years, with the continuous advancement of internal combustion engine technology, vehicle engines are developing towards high power, low energy consumption, and long life. And the comprehensive performance of components has put forward higher requirements. [0003] The valve mechanism is an important part of the engine and a very critical component of the engine. Its basic function is to open and close the intake and exhaust valves at regular intervals according to the requirements of the working cycle and firing sequence in each cylinder of the engine, so that fresh air can In time, it enters the cylinder, and the exhaust gas is discharged f...

AI Technical Summary

Problems solved by technology

However, the research work on the two typical friction pairs in the distribution mechanism is still lacking, especially the experimental research on the friction pairs, which is mostly concentrated on the sample-level test, and the part-level test that is in good agreement with the working environment and the actual situation has not been adopted. There are very few reports on the direct use of parts for friction and wear tests

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