Hengyang Heavy Industry YWZ5-400/121 dust and gas industrial explosion-proof brake for coal mine and chemical plant

Structure and working principle

The brake consists of yoke, excitation coil, spring, brake disc, armature, spline sleeve, mounting dowel, etc. The brake is mounted at the rear end of the flange (or motor) of the equipment; the drive shaft and the spline sleeve are coupled with the brake disc.

Brake excitation coil connected to the rated voltage (DC), the electromagnetic force suction armature, so that the armature and brake disc disengagement (release), then the drive shaft with the brake disc normal operation or start, when the transmission system separation or power failure, the brake is also at the same time power failure, this time the spring pressure on the armature, forcing the brake disc and the friction torque between the armature and flange to produce a rapid stopping the drive shaft. In the brake heat dissipation environment is poor, the drive shaft is a long time continuous work, if the conditions allow, then the brake can be kept after the work of the voltage conversion to 70% -80% of the rated voltage, in order to reduce the heat .

A mechanical part that stops or slows down the moving parts in a machine. Commonly known as brake, brake. Chain Dai electromagnetic brake is mainly composed of brake frame, brake parts and manipulation device. Some electromagnetic brakes are also equipped with automatic adjustment devices for the clearance of braking parts.

The resisting torque that must be applied to stop or decelerate the mechanical running parts is called braking torque. Braking torque is the basis for designing and selecting brakes, and its size is determined by the type of machinery and working requirements. The performance of the friction material (brake) used on the brake directly affects the braking process, and the main factors affecting its performance are the operating temperature and the rate of temperature rise. Friction materials should have a high and stable coefficient of friction and good wear resistance. Friction materials are divided into metal and non-metal two categories. The former commonly used cast iron, steel, bronze and powder metallurgy friction materials, the latter have leather, rubber, wood and asbestos, etc.

If the left side of the hydraulic system schematic diagram for the output of high-pressure oil, so the hydraulic system of oil suction and return can be directly in the case. Valve block is in addition to the oil pump and hydraulic cylinder, the integration of the components, gear pump output of high-pressure oil through the shut-off block into the hydraulic cylinder work. The positive and negative rotation of the motor realises the reciprocating motion of the piston rod of the hydraulic cylinder. The hydraulic parts are working in the closed steel cylinder tank, brake with electric hydraulic actuator principle electric hydraulic actuator principle AC motor through the coupling drive two-way gear pump work.

Will lead to increased internal and external leakage, reducing its mechanical efficiency. At the same time, due to higher temperatures, the hydraulic oil will expand, resulting in increased compression, so that the control action can not be well transmitted. Solution: heat is an inherent feature of the hydraulic system, can not be eradicated only try to reduce. The use of good quality hydraulic oil, hydraulic piping arrangement should try to avoid the emergence of elbows, the use of high-quality piping and fittings, hydraulic valves and so on.