MW400-1250 electromagnetic drum brake with high frequency of action by Hengyang Heavy Industry

If the left side of the hydraulic system schematic shows output high-pressure oil, the oil suction and return of the hydraulic system can be directly carried out in the hydraulic box. The valve block is the integration of various components except for the oil pump and hydraulic cylinder, and the high-pressure oil output from the gear pump enters the hydraulic cylinder through the valve block for operation. The forward and reverse rotation of the electric motor realizes the reciprocating motion of the hydraulic cylinder piston rod. Each hydraulic component operates in a closed steel cylinder oil tank, and the brake is equipped with an electric hydraulic thruster. The principle of electric hydraulic thruster is that the AC motor drives a bidirectional gear pump through a coupling.

It will lead to increased internal and external leakage and reduce its Mechanical efficiency. At the same time, due to high temperature, the hydraulic oil will expand, resulting in increased Compressibility, so that the control action can not be well transmitted. Solution: Heating is an inherent characteristic of hydraulic systems, and cannot be eradicated but can only be minimized as much as possible. The use of high-quality hydraulic oil and the layout of hydraulic pipelines should try to avoid the appearance of elbows, use high-quality pipelines, pipe joints, hydraulic valves, etc.