System and method for testing all-weather tyre tread-road surface frictional characteristic

Abstract

The invention discloses a system and a method for testing an all-weather tyre tread-road surface frictional characteristic. The test system comprises a console, a speed adjusting motor, a rotary disk, a pressure disk, a hydraulic loading cylinder, a vertical pressure sensor, a tyre tread test block, an environmental chamber, an environment control unit, a horizontal pulling and pressing sensor, a frictional road surface and the like; with the adoption of the system, the friction coefficient measurement between the all-weather rubber tyre tread and road surface covering the change ranges of use working conditions (including various different contact pressures, ambient temperature and humidity, slip velocity and road surface condition) of an automobile tyre can be realized, and an effective technological means can be provided for obtaining a curve of friction coefficient-slip velocity of rubber materials. Combined with the disclosed test system, a test method with short-time contact measurement is adopted in the invention to greatly reduce the influence on the libratory result due to rubber abrasion and temperature rising in the rubber friction coefficient test, and the repeatability and accuracy of the libratory result are remarkably improved.

Description

Technical field [0001] The invention belongs to the field of tire tribology research, and specifically relates to an all-weather tire tread-road surface friction characteristic test system and method, which can provide effective test methods and test methods for the friction and wear properties of tire tread rubber materials. At the same time, it can provide a platform for measuring the tire-road friction characteristics at different speeds. Background technique [0002] As the main component of tires, rubber has special friction characteristics and does not comply with Coulomb's law of friction. The mechanical properties of rubber tires largely depend on the friction properties of rubber (especially in some extreme conditions). The theoretical research on rubber friction is still immature. Therefore, the testing and research of rubber friction is very important for the research of tire mechanical properties. [0003] In order to study the friction characteristics of rubber, peo...

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Problems solved by technology

The development of these devices has greatly advanced the theory of friction, but some features of these instruments make it difficult to study the friction characteristics of tires:

[0004] (1) Due to the limitation of the structure, the speed range is very narrow (mostly low speed, less than 1m / s);

[0005] (2) The friction medium is single and difficult to replace;

[0006] (3) The measurement time is long, resulting in severe wear and rapid heat generation of the test piece, which affects the accuracy of the measurement results;

[0008] (5) The application of load is not automated, and the range of change is small

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