Braking system for operating mechanism of crane and control method of braking system

Abstract

The invention discloses a braking system of an operating mechanism of a crane. The braking system consists of a work braking system and a safety braking system, wherein a motor of a work brake of the work braking system is driven by a frequency converter, a given speed of the frequency converter is provided by a pedal switch with a potentiometer, the work brake adopts a normally opened brake, and a braking torque is controlled by the pedal switch under the normal work conditions; a safety brake of the safety braking system is controlled by a contactor, the switching on and off of the contactor are controlled by an operating mechanism handle, an emergency stop switch and a power, the safety brake adopts a normally closed brake, the safety brake and the operating mechanism handle are interlocked under the normal work conditions, and the safety brake is automatically closed under the work conditions that the crane stops, the operating mechanism is power off accidently and stops emergently and the like. The braking system for the operating mechanism of the crane and the control method of the braking system have the beneficial effects that the braking torque of the operating mechanism is controllable, the operation is convenient and flexible, fierce braking is avoided, the crane can be quickly stopped and aligned, and the safety reliability of the operating mechanism of the crane is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of cranes, and in particular relates to a brake system of a crane operating mechanism. Background technique [0002] The braking system of the traditional crane operating mechanism is that one motor corresponds to one brake. The brake setting position is relatively flexible, and some are set on the floating shaft between the motor and the reducer or the end of the full-tooth coupling close to the reducer; Some are set at the tail of the motor. In the traditional braking system, the working state of the brake is interlocked with the operating handle of the crane. Under normal working conditions, the brake is fully opened when the operating handle leaves the zero position; after the handle returns to zero, the brake brakes immediately. The shortcomings of the traditional braking system are: when the brake is working normally, it can ensure the safety of the operating mechanism, but it is inconvenient to opera...

AI Technical Summary

Problems solved by technology

The shortcomings of the traditional braking system are: when the brake is working normally, it can ensure the safety of the operating mechanism, but it is inconvenient to operate, and the alignment is difficult, and the alignment work cannot be completed quickly and effectively even after multiple jogs.

However, this method does not meet the requirements of the crane design for operation, and it is easy to cause damage to the mechanism; and there are relatively large safety hazards, such as when the crane loses power, it will cause the crane to slide freely, and may lead to accidents in severe cases

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