Special dynamic and static combined hydraulic cylinder for rock and soil mechanics test equipment

Abstract

The invention discloses a special dynamic and static combined hydraulic cylinder for rock and soil mechanics test equipment, which comprises a static loading hydraulic cylinder barrel, a static loading hydraulic cylinder plunger, a static loading hydraulic cylinder end cover, a dynamic loading hydraulic cylinder front end cover, a dynamic loading hydraulic cylinder rear end cover, a dynamic loading hydraulic cylinder piston rod, uniformly distributed load compensation hydraulic cylinder end covers, uniformly distributed load compensation hydraulic cylinder piston rods, a static load transmission pad, a dynamic load transmission pad, a retainer and a loading head. The dynamic loading hydraulic cylinder is integrated in the static loading hydraulic cylinder. The high frequency loading of dynamic load is realized by oil filling and discharging of dynamic loading hydraulic cylinder oil inlets and outlets, and plunger extension is realized by oil filling of a static loading hydraulic cylinder control oil port to realize loading of static load. According to the invention, a single hydraulic cylinder unit is adopted to realize the loading process of static load and dynamic load at the same time, so that the loading head is ensured to be always attached to the loading surface of the test piece, and the static load is ensured to be uniformly distributed on the loaded surface of the testpiece.

Description

technical field [0001] The invention relates to the technical field of hydraulic machinery, in particular to a special dynamic and static combination hydraulic cylinder used for rock and soil mechanics test equipment. Background technique [0002] In the existing rock and soil mechanics test equipment, in order to realize the uniform application of static load on the loaded surface of the test piece, the static load hydraulic cylinders used are mostly dot matrix hydraulic cylinder groups. [0003] Zhou Hui, Meng Fanzhen, Zhang Chuanqing and others mentioned a uniform pressure loader in the article "Research Status and Thinking of Rock Burst Physical Simulation Test". Loading, because there are multiple static load hydraulic cylinder loading units in the dot matrix static load hydraulic cylinder group, the entire loaded surface of the specimen is divided into scattered unit loading surfaces with the same number of hydraulic cylinder units as the static load hydraulic cylinder...

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Problems solved by technology

[0003] Zhou Hui, Meng Fanzhen, Zhang Chuanqing and others mentioned a uniform pressure loader in the article "Research Status and Thinking of Rock Burst Physical Simulation Test". Loading, since there are multiple static load hydraulic cylinder loading units in the dot matrix static load hydraulic cylinder group, the entire loaded surface of the specimen is divided into scattered unit loading surfaces with the same number of hydraulic cylinder units as the static load hydraulic cylinder group , it is easy to cause damage to the loaded surface of the specimen, resulting in serious damage to the loaded surface of the entire rock and soil specimen, which is not conducive to the observation of the specimen and has a great impact on the test results of the rock and soil test, and the static load hydraulic pressure The overall use cost of the cylinder group is high, the laying of hydraulic pipelines is relatively complicated, the overall structure is not compact enough, it takes up a large space, and it is prone to leakage and other faults. The troubleshooting of faults is more complicated, and it is impossible to complete the dynamic load application process. It is impossible to truly simulate the load state of the rock and soil specimen

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