Self-adaptive control system and method for rock dynamic true triaxial hydraulic source flow pressure

Abstract

The invention discloses a elf-adaptive control system and method for rock dynamic true triaxial hydraulic source flow pressure. The system comprises an oil tank, a small-flow oil pump, a large-flow oil pump, a dynamic actuator, a high-low pressure automatic control unit and a dynamic actuator flow self-adaptive control unit. The small-flow oil pump and the large-flow oil pump are arranged in parallel, and an oil inlet of the oil pump communicates with the oil tank; an oil outlet of the oil pump communicates with the dynamic actuator through the high-low pressure automatic control unit and the dynamic actuator flow self-adaptive control unit in sequence. The method comprises the steps of high-low pressure automatic control and dynamic actuator flow self-adaptive control, and non-load starting, low-pressure work, low-pressure-to-high-pressure work and high-pressure-to-low-pressure work can be achieved through the high-low pressure automatic control; the flow self-adaptive control of the dynamic actuator can meet the switching between a small flow state and a large and small flow state; the dynamic actuator can be kept in the small flow working state after obtaining small flow hydraulic oil, and therefore a full-curve stress-strain test can be completed; and a complete stress-strain curve can be obtained.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, in particular to a rock dynamic true triaxial hydraulic source flow pressure adaptive control system and method. Background technique [0002] At present, the dynamic true triaxial hydraulic system of the true triaxial tester adopts the hydraulic servo loading system. Although the system has relatively large load stiffness, velocity stiffness, and position stiffness, and has strong anti-interference ability, there is also obvious pressure loss. and flow loss disadvantages. In addition, the pressure of the system is mostly selected manually, which is not only complicated to operate, but also cannot be selected according to the working conditions, resulting in waste of energy. In addition, in order to obtain a complete stress-strain curve in the dynamic true triaxial test, the dynamic actuator needs a small flow loading capacity, and the current system cannot keep the dynamic actuator...

AI Technical Summary

Problems solved by technology

[0002] At present, the dynamic true triaxial hydraulic system of the true triaxial tester adopts the hydraulic servo loading system. Although the system has relatively large load stiffness, velocity stiffness, and position stiffness, and has strong anti-interference ability, there is also obvious pressure loss. and the disadvantage of traffic loss

In addition, the pressure of the system is mostly selected manually, which is not only complicated to operate, but also cannot be selected according to the working conditions, resulting in waste of energy

In addition, in order to obtain a complete stress-strain curve in the dynamic true triaxial test, the dynamic actuator needs a small flow loading capacity, and the current system cannot keep the dynamic actuator in a small flow working state, and it is difficult to obtain a complete The stress-strain curve of

Images