Reciprocating high-temperature high-load friction wear test method and apparatus

Abstract

The invention discloses a reciprocal high-temperature high-load friction and abrasion test method and equipment in the friction and abrasion testing technique domain, which is characterized by the following: the reciprocal moving structure, lower sample bottom support structure and upper sample vertical location structure adapt standard rolling bearing to realize the dynamic part measurement of friction coefficient, which improves the accuracy greatly; the load is constructed precisely to exclude the interference of sample moving structure friction force by static friction; the standard bearing improves the bearing ability, whose maximum load of nominal construction reaches 10000N to reduce the quality of moving structure and reciprocal inertia force and make the system operate stably at 800r / min; because of the orientation heating and thermal action of sample, the sample gains higher temperature and the bottom temperature remains low; the rolling shaft supports the bottom of sample bearing floor to keep enough space for cooling and lubricating through lubrication oil.

Description

technical field [0001] The invention belongs to the technical field of friction and wear testing. It relates to a new reciprocating high temperature and high load friction and wear test method and equipment. Background technique [0002] The current status of the reciprocating friction and wear testing machine is: (1) Most of the reciprocating mechanisms use sliding methods for positioning and guidance. The problem is that the friction force is large and the life of the friction pair is short; structure, but there is a point contact between the ball and the floor of the lower sample fixture, the fatigue problem under high load is difficult to solve, and the life of the lower sample fixture is very short. These have all influenced the life-span of testing machine, the reliability of work, the accuracy of test result, have limited the scope of maximum load. (2) The operation of the upper sample fixture in the vertical direction is also positioned and guided by sliding. Becau...

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Problems solved by technology

[0002] The current status of the reciprocating friction and wear testing machine is: (1) Most of the reciprocating mechanisms use sliding methods for positioning and guidance. The problem is that the friction force is large and the life of the friction pair is short; structure, but there is a point contact between the ball and the floor of the lower sample fixture, the fatigue problem under high load is difficult to solve, and the life of the lower sample fixture is very short

These all affect the life of the testing machine, the reliability of the work, the accuracy of the test results, and limit the range of the maximum load

(2) The operation of the upper sample fixture in the vertical direction is also positioned and guided by sliding. Because the movement range is small and the static friction is large, it has a great impact on the accuracy of the load; The problem of fatigue and wear also directly affects the life of the friction pair and the accuracy of the test results

(3) For the method of using the overall heating of the moving mechanism, the maximum heating temperature is limited due to the difficulty in selecting materials for the moving guide parts of the reciprocating mechanism; for the method of using local heating at the bottom of the sample, because the ground load supporting mechanism is in sliding contact, bringing For many problems such as heat dissipation and lubrication, the test temperature is generally low, below 150°C

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