Adjustable clamp for piston ring-cylinder sleeve test piece reciprocating friction tests

Abstract

The invention belongs to the technical field of friction tests and discloses an adjustable clamp for piston ring-cylinder sleeve test piece reciprocating friction tests. The adjustable clamp comprisesa piston ring test piece clamping mechanism and a cylinder sleeve test piece clamping mechanism; when the adjustable clamp is working, the piston ring test piece clamping mechanism and the cylinder sleeve test piece clamping mechanism are oppositely arranged; the cylinder sleeve test piece clamping mechanism is used for clamping cylinder sleeve test pieces with different lengths through movement;the cylinder sleeve test piece clamping mechanism comprises an oil tank, two cylinder sleeve jacking blocks and a plurality of oil tank threaded push rods which are in threaded connection with the oil tank; the two cylinder sleeve jacking blocks are arranged in the oil tank at intervals; the oil tank threaded push rods are divided into two groups which are oppositely arranged and connected to theoil tank; the front ends of the oil tank threaded push rods extend into the blind holes of the cylinder sleeve jacking blocks; and the oil tank threaded push rods rotate relative to the oil tank so as to push the corresponding cylinder sleeve jacking blocks to move, so that a cylinder sleeve test piece can be clamped. The adjustable clamp of the invention can be adjusted, so that the adjustable clamp can adapt to piston ring-cylinder sleeve test pieces with different sizes and shapes, and therefore, the clamp has high flexibility.

Description

technical field [0001] The invention belongs to the technical field related to friction test, and more specifically relates to an adjustable fixture used for reciprocating friction test of a piston ring-cylinder liner sample. Background technique [0002] As the most important friction pair in modern internal combustion engines, the piston ring-cylinder liner plays an indispensable role in sealing, heat conduction and friction reduction. Studies have shown that piston ring-cylinder liner friction loss accounts for 50% to 60% of the entire internal combustion engine friction loss. It can be seen that the working performance of the piston ring-cylinder liner friction pair not only affects the power and reliability of the engine, but also relates to the working efficiency and economy of the whole machine. In the field of friction testing, in order to better simulate the working state and performance of the piston ring-cylinder liner friction pair, many researchers use cylinder...

AI Technical Summary

Problems solved by technology

At the same time, depending on the engine model, there are also large differences in the structural dimensions of the piston ring and the cylinder liner, so the use of the fixture is limited due to poor adaptability and reliability.

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