Cylinder liner and piston assembly friction online test device and test method

Abstract

The invention discloses a cylinder liner and piston assembly friction online test device and a test method. A power unit is connected with a piston through a piston pin. The piston is in sealing connection with a cylinder liner through a first gaseous ring, a second gaseous ring and an oil scraper ring installed in a ring slot of the piston. A baffle is fixed to a cylinder body in such a way that a gap is formed between the baffle and the cylinder body. The cylinder body is equipped with a cooling chamber and an oil pan. The cylinder liner is fixed in a sealing way inside the cylinder body. A friction force sensor is fixed into the gap between the baffle and the cylinder body, so one end of the friction force sensor is fixed to the baffle and the other end is fixed to the cylinder liner. Through the cylinder liner and piston assembly friction online test device and the test method of the invention, the thermal load under actual working condition and the cooling and lubricating of a cylinder liner and piston ring set can be simulated, a radial load can be applied to the piston ring to make the thermal load and mechanical load of the cylinder liner and piston ring set in test closer to those under actual working condition, and the test results are more accurate.

Description

technical field [0001] The invention relates to the technical field of friction and wear testing, and relates to an online test device and a test method for the friction force of a cylinder liner and a piston assembly. Background technique [0002] At present, the research on the friction power consumption of the cylinder liner and piston assembly generally adopts the backward drag method. This method is tested in the non-ignition state. Therefore, compared with the actual working state, the cylinder liner and piston assembly are not heated by the high temperature of the combustion chamber and lack of friction The piston ring is radially loaded with pressure, which makes the measured friction power consumption differ greatly from the actual working state. The patent "A Cylinder Liner Piston Ring Parts Friction and Wear Test Equipment" (Patent No.: ZL200520146126.6) for radial loading of the piston ring uses a disc spring to mechanically load the piston ring in a radial direc...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the above problems, and researches and designs an online test device and test method for the friction force of the cylinder liner and the piston assembly, which is used to solve the existing test device and test method, and test the friction force of the cylinder liner and the piston assembly The downside of being inaccurate

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