Mechanical automatic constant hydraulic pressure-sustaining experiment system

Abstract

The invention discloses a mechanical-type self-maintenance constant hydraulic pressure testing system, which comprises a support, a bearing bracket and a roller. A backing plate is fixed on the bracket through nuts, the support and a supercharger are fixed on the backing plate through bolts, the bearing bracket is fixed on the support through bolts, a supporting bar is connected with the bearing bracket through a shaft, a threaded rod is connected at one end of the supporting bar, a balance weight is sleeved on the threaded rod, a cylindrical block is fixed on the supporting bar through bolts, and contacts the supercharger, a sliding block is clamped on the supporting bar through a pressing block, the pressing block is connected with the supporting bar through sunk screws, the front end of the threaded rod is moved to be connected with the supporting bar through a nut base, the back end thereof is connected with the sliding block through a round pressing plate and sunk screws, the roller is positioned above the sliding block, a lifting frame is connected with the roller through a rolling bearing, a disk is connected with the lifting frame through a connecting threaded rod, a hanging basket is connected with the disk, a level gauge is positioned above the supporting bar. The testing system can provide constant hydraulic pressure source, and is not subject to outside influence. Furthermore, the testing system has the advantages of simple structure, stable performance and convenient operation.

Description

technical field [0001] The invention relates to a mechanical automatic maintenance constant hydraulic test system, which is especially suitable for creep tests of rocks under different axial pressures. The test results can be widely used in the research of creep damage of rocks, which is beneficial to rock mass engineering. Long-term stability research has important theoretical value and practical significance. Background technique [0002] Rock creep generally refers to the mechanical phenomenon that the deformation of rock increases gradually with time under the condition of constant stress. The study of rock creep is essential for a reasonable evaluation of the long-term stability of rock mass, that is, the time effect of rock mechanical behavior. Creep phenomena widely exist in all kinds of rock engineering, and a large number of engineering instability are closely related to the creep characteristics of rocks. The creep phenomenon is more obvious in the soft rock road...

AI Technical Summary

Problems solved by technology

[0006] (1) Use the electro-hydraulic servo control system to provide constant load: the pressure output of this method fluctuates, it is difficult to guarantee the real constant load, the energy consumption is large, the test cost is high, and some long-period tests are difficult to complete

[0007] (2) Use the principle of leverage to provide constant load: This method is greatly affected by the outside world. During the test process, the lever is prone to tilt and other phenomena. At this time, the expansion force ratio will change, and the constant load cannot be guaranteed.

[0008] (3) Use weights to stack directly to provide constant load: this method cannot be pressurized, is bulky, inconvenient to operate, and not efficient

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