Speed regulation method and equipment of crane hoisting mechanism and crane comprising equipment

Abstract

The invention discloses a speed regulation method and equipment of a crane hoisting mechanism and a crane comprising the equipment. The hoisting mechanism comprises a motor and a transmission mechanism. The method comprises the following steps of: receiving the weight of a heavy object; calculating the rotating speed of the motor according to the weight, the rated power of the motor, the transmission ratio of the transmission mechanism and the length of a force arm, and controlling the motor to run in the rotating speed so as to drive the transmission mechanism to hoist or drop the heavy object. With the adoption of the technical scheme, the equipment can automatically regulate the rotating speed of the motor according to the weight of the heavy object so that the rotating speed of the motor can perform self-adaptive changes along with different weights of heavy objects and not be limited by gears, and therefore, the hoisting efficiency of the crane is improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a method and equipment for speed regulation of a hoisting mechanism of a crane and a crane including the equipment. Background technique [0002] The current large-scale tower cranes mostly use frequency conversion speed regulation method to adjust the lifting speed. The frequency converter adjusts the motor speed, the motor is connected to the reducer, and the reducer drives the hoisting mechanism to wind the wire rope, drives the hook to lift, and thus lifts the heavy object. Generally speaking, the frequency converter directly controls the motor speed to 3~5 gears, which correspond to different maximum lifting weights, but in the actual lifting process, the heavy objects to be lifted are generally not exactly equal to the maximum lifting weight. When the lifting weight is greater than the maximum lifting weight of a certain gear, it needs to be downshifted to run, so that...

AI Technical Summary

Problems solved by technology

Generally speaking, the frequency converter directly controls the motor speed to 3~5 gears, which correspond to different maximum lifting weights, but in the actual lifting process, the heavy objects to be lifted are generally not exactly equal to the maximum lifting weight. When the lifting weight is greater than the maximum lifting weight of a certain gear, it needs to be downshifted to run, so that the maximum power of the motor cannot be exerted, and the efficiency of the lifting operation is low

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