Variable-diameter roller, energy-saving hoisting mechanism, bucket type mixing station and control method

Abstract

The invention relates to a reducing type roller, an energy-saving hoisting mechanism, a lifting hopper type stirring station and a control method. The reducing type roller comprises a first roller body, a second roller body and a third roller body which are sequentially arranged. The diameter of the first roller body and the diameter of the third roller body are both smaller than the diameter of the second roller body. The small-large-small diameter-variable roller structure form is adopted for the roller, the low-high-low change can be adopted for the linear speed of a steel wire rope wound on the roller, energy conservation and environmental friendliness are relatively achieved, the service life of the whole system is prolonged, impact which is caused by a hopper truck to a walking rail, the steel wire rope and a motor is greatly reduced, and noise is lowered; meanwhile, current generated at the moment when the motor is started is reduced, the motor is protected, the service life of the motor is prolonged, and safety performance of the system is improved.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a variable-diameter roller, an energy-saving winch mechanism, a bucket-type mixing station and a control method. Background technique [0002] At present, most of the hoisting and hoisting mechanisms of the hoisting stations used in the market are equal-diameter rollers matched with S1 motor-type reducers, and the linear velocity V of the equal-diameter rollers reaches the maximum value in a short period of time, so In this process, the acceleration a of the equal-diameter roller tends to infinity. According to the formula F=ma (m mass, a acceleration), the value of the pulling force F of the steel wire rope tends to infinity when the moment starts, and according to the formula M=FL (M moment , F pulling force, L moment arm), because the moment arm L is a fixed value, the value of the moment M also tends to infinity when it starts instantaneously. At the moment when the val...

AI Technical Summary

Problems solved by technology

At the moment when the value of V and M increases: the reducer and the wire rope need to bear the moment and tension value several times higher than the normal working state, which greatly reduces the service life of the two, and the instantaneous impact of the hopper car on the track and the reducer It will also generate a lot of noise and affect the surrounding working environment, etc.

[0003] In order to overcome the following problems caused by the hoisting mechanism of the conventional bucket-type mixing plant due to the excessive increase in the instantaneous speed and torque at the start: the instantaneous current of the motor is too high, which is prone to brake shutdown and waste of energy consumption; The resulting instantaneous impact will reduce the life of the entire system, there are potential safety hazards, and the noise will affect the surrounding working environment. Winch lifting device

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