Gas-hydraulic composite fast-following cylinder capable of applying dynamic and static loads and its realization method

Abstract

The invention discloses a gas-liquid composite quick-following oil cylinder capable of applying dynamic and static loads and a realization method, which solves the problem that the existing loading device can only apply static loads and dynamic loads alone, and the hysteresis of supplementary pressure, and has compact structure and integral sealing The specific scheme is as follows: a gas-hydraulic compound fast-following oil cylinder that can apply dynamic and static loads, including a cylinder body, the cylinder body is a sealed structure, and the internal space of the cylinder body is sequentially composed of a return chamber, an oil pressure chamber and The energy storage chamber, the return chamber and the energy storage chamber can be fed with gas respectively, and the oil pressure chamber can be fed with oil, and the seal is arranged in the oil cylinder to isolate the return chamber, the oil pressure chamber and the energy storage chamber from each other; inside the cylinder body A hollow loading rod is provided, and an impact rod is movable inside the hollow loading rod, and one end of the impact rod can be connected with the impact load applying system.

Description

technical field [0001] The invention relates to the field of loading devices, in particular to a gas-liquid composite fast-following oil cylinder capable of applying dynamic and static loads and a realization method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the increase of mining depth and mining intensity of coal resources, mine rockburst disasters are becoming more and more serious, which seriously threatens the safety of coal mining. At the same time, the geological conditions of my country's coal mines are extremely complex, and most of the mined coal seams have a tendency to impact. Especially after the transition to deep mining, the stress of the original rock in underground engineering increases, the temperature of the surrounding rock increases, the rock failure process is strengthened, the deformation of the roadway su...

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Problems solved by technology

[0010] (1) The existing impact disturbance loading devices generally apply static load and dynamic load alone, which cannot truly simulate the coal and rock physics of deep coal and rock mass under the combined force state of dynamic load-static and static load-different strain rate disturbance loads mechanical properties;

[0011] (2) It cannot be combined with the existing impact power source (pendulum, heavy hammer, Hobkinson rod, etc.), and the function is relatively single;

[0012] (3) Due to the hysteresis of pressure replenishment by ordinary hydraulic loading devices, it is difficult to maintain a constant surface load at the moment when the specimen is damaged by impact disturbance, and it is impossible to completely restore the physical and mechanical state of the coal rock at the moment of impact disturbance damage.

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