System for testing friction force and slip characteristics of O-shaped rubber ring in pressurized state

The invention relates to a system for testing friction force and slip characteristics of an O-shaped rubber ring in a pressurized state. Stable gas pressures with different pressures are respectivelysupplied to the two sides of the O-shaped rubber ring through the gas supply assembly at the same time. The tool valve element is driven to move relative to the tool shell and the tool shell base through the first clamp and the first connecting pin of the tension and compression tester. By arranging a first buffer container and a second buffer container, the pressure change caused by heat exchangeand tool valve element movement after the two sides of the O-shaped rubber ring are pressurized is reduced, and the friction force of the O-shaped rubber ring under various different working conditions is measured through the force sensor, the displacement sensor and the collecting equipment. According to the invention, stable gas pressures with different pressures can be supplied to the two sides of the O-shaped rubber r