Winch mechanism actuator brake bracket-Question-News-Jiaozuo brake

Winch mechanism actuator brake bracket

Time：2021-05-02  View：505

Winch mechanism actuator brake bracket

The winch mechanism actuator is a hydraulically operated normally closed brake that can be widely used in lifting and transportation machinery to stop the lifting speed of objects and absorb the inertia of motion or rotary mechanism motion mass

The brake mainly consists of a vertical plate frame, a brake shoe, an adjustment rod, a spring, and a base. The brake shoe is connected to the vertical plate frame, and the vertical plate frame is connected to the base by a shaft pin. The supporting side can be equipped with an electromagnet, and the main spring is installed above the vertical plate frame. The top of the adjustment rod is similar to the stopping gear of the electromagnet. In order to increase the friction coefficient between the brake shoe and the surface of the brake wheel, a replaceable asbestos brake band is installed on the brake shoe

When the operated electromagnet of the winch mechanism is powered off, the brake compresses the spring to maintain the braking state. When the electromagnet is energized and closed, it releases the brake, allowing the mechanism to operate. When the winch mechanism brake is used, sometimes there are situations where the brake is adjusted tightly to hold the rated load brake, but the brake wheel will soon produce smoke from the brake belt, making the motor rotation appear difficult and the sound dull; Although the brake wheels are not heating up and the motor rotates properly, they cannot hold the net, even under light loads. The situation where the winch mechanism actuator is "too loose to hold or too tight to open" often occurs in crane operators after maintenance. The main reason is that: (1) the relative error between the sleeve center of the brake wheel and the center of the brake pad is too large (not allowed to exceed 3mm). This is because there was an error in the installation of the gearbox after maintenance, which caused the position of the brake wheel to be changed, resulting in a case where the brake shoe could not be opened due to one side breaking through the shoe. When the brake wheel is aligned at the center of two brake shoes, this fault can be eliminated. (2) The centerline of the brake shoe and brake wheel is tilted. When the installation position of the reducer and the sliding lever system (brake frame) of the winch mechanism actuator is incorrect, it can cause partial contact between the brake shoe and the brake wheel, causing the closed shoe to not hold the brake wheel tightly. In this case, if the brake shoes are tightened slightly, there will be a phenomenon where the brake shoes cannot be completely released from the brake wheels, and the winch mechanism actuator will cause high heat to be generated by friction on the brake wheels. When the brake shoe is released, the inclination or unevenness between the brake shoe and the brake wheel shall not exceed one thousandth of the width of the brake wheel. (3) Due to severe wear and tear on the various pin shafts and shaft holes of the brake, the ineffective stroke (empty stroke) for adjusting the electromagnet is increased, while the effective stroke is reduced. (4) After the brake wheel is worn, it causes errors during reprocessing. (5) Due to improper adjustment of the winch, the brake solenoid stroke is too small. This situation often occurs when only adjusting the pull rod without adjusting the upright rod. (6) The processing size of the newly replaced adjustment rod is incorrect

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