Jiaozuo brake

Mainly requires synchronous operation with the winch motor. When the winch is driving, the brake should be immediately opened, otherwise the motor will be blocked; When the winch stops, the brake should immediately lose power and lock up. From the control requirements, it can be seen that in order to work synchronously with the holding brake and the winch motor. When the brake fails automatically, it can still work. A manual button should be designed to start and stop the hydraulic brake. The structure of electromagnetic brake:

It mainly consists of two parts: brake electromagnet and brake shoe brake.

The brake electromagnet is composed of three parts: an iron core, an armature, and a coil. The brake shoe brake includes the brake wheel, brake shoe, and spring, etc. The brake wheel and the electric motor are installed on the same shaft.

2. Working principle: When the electric motor is connected to the power supply, the electromagnetic brake coil is also energized, and the armature is attracted to overcome the tension of the spring to separate the brake shoe and brake wheel, resulting in normal operation of the electric motor. When the switch or contactor is disconnected, the motor loses power, and the electromagnetic brake coil also loses power. The armature separates from the iron core under the force of spring tension, causing the brake shoe of the brake to tightly hold the brake wheel, and the motor is stopped by braking. 1. Loosen the spring of the braking torque.

2. Manually lift the thruster triangle and adjust the upper adjustment screw to make the opening gap of the brake shoe 1.5mm (brake shoe and brake wheel). Adjust the lower limit screw of the brake bracket to evenly distribute the opening gap on both sides of the brake shoe.

3. Adjust the torque spring to meet the required scale.

4. Tighten all locking nuts. (After the gate adjustment is completed)

5. When the brake shoe is worn to the required level, replace it and adjust it according to the above steps. During the wear process of the brake shoe, due to the wear of the brake shoe, the triangle plate of the thruster is lowered. When the smooth rod of the thruster drops close to the compensation limit mark, the brake gap should be adjusted in a timely manner. When the hydraulic holding brake is used as the brake mechanism for the crane, trolley and winch, the three-phase power supply of the hydraulic holding brake is connected in parallel with the motor stator coil, and the motor is powered on and the hydraulic holding brake is powered on. If the hydraulic holding brake is used to locate the winch load with relatively accurate requirements, the three-phase power supply of the hydraulic holding brake cannot be connected in parallel with the motor stator coil. Because the motor stator coil is a 3-phase high inductance coil, a large amount of electrical energy is stored in the motor stator coil during operation. If the hydraulic brake is directly connected in parallel with the stator coil of the motor, when the motor is powered off, the electrical energy stored by the motor inductance coil will discharge to the hydraulic brake head motor. This delay in closing the brake is the discharge time, causing the winch motor to power off, and the brake will not immediately lock up. If the winch and elevator use hydraulic brake that requires accurate positioning, if connected together, it will cause inaccurate parking of the winch and elevator. In this case, the hydraulic brake needs to have a separate control circuit

Two types of diagrams, YWZ4 and YWZ