A high-power electro-hydraulic control system for compression shear testing machine

Abstract

The invention relates to a high-power electro-hydraulic control system for a compression-shear testing machine. The system comprises: a loading execution unit, a hydraulic power unit and an electric drive unit; the upper loading plate of the compression-shear testing machine is driven by the loading execution unit. It moves in different directions with the lower loading plate, provides hydraulic oil for the loading execution unit through the hydraulic power unit, provides electricity for the loading execution unit and the hydraulic power unit through the electric drive unit, and controls the running speed of the loading execution unit. The hydraulic-electric hybrid drive is used to jointly drive the loading plate to move, so that the output force of the hydraulic transmission part is reduced, and the corresponding size is also reduced, so that the flow provided by the accumulator is reduced, thereby reducing the number of accumulators required, and Through the cooperation of the electric drive unit and the loading execution unit, the braking kinetic energy of the working device is efficiently recovered.

Description

technical field [0001] The invention relates to the technical field of compression-shear testing machines, in particular to a high-power electro-hydraulic control system for compression-shear testing machines. Background technique [0002] As a typical testing machine, the compression shear testing machine plays a pivotal role in the performance testing of shock absorption materials, and can be used for the compressive elastic modulus, shear elastic modulus, shear aging resistance and compression resistance of shock isolation devices. Intensity detection. In order to meet the great output force demand, in the compression shear testing machine, the servo valve-controlled cylinder system is usually used to drive each actuator to complete the detection task. During the working process, in order to control the movement of each actuator, the control valve of the hydraulic system has a very large throttling loss; during the deceleration and braking process of the actuator, the la...

AI Technical Summary

Problems solved by technology

During the working process, in order to control the movement of each actuator, the control valve of the hydraulic system has a very large throttling loss; during the deceleration and braking process of the actuator, the large-capacity kinetic energy of the working device is converted into Heat energy dissipated, there is a very large energy waste

At the same time, in order to meet the super large flow demand in the dynamic loading process, a large number of accumulator groups are equipped, resulting in a large space and high cost for the whole machine

Images