Brake device and brake method for vibratory screen motor of asphalt mixing station

Abstract

The invention belongs to the field for a motor brake technology, and particularly relates to the field of a brake technology which is applied to a vibratory screen motor of an asphalt concrete stirring apparatus. According to the characteristics of the vibratory screen of an asphalt mixing station, a timing controller is utilized for accurate control over the time of connection with a reverse phase sequence power supply and the time of reversal connection brake, and a brake power supply is connected or removed based on the time. Compared to the prior art, the brake device and the brake method provided by the invention can eliminate the resonance vibration during the shutdown process of the vibratory screen, the stable shutdown of the vibratory screen and a main building apparatus can be realized, the service life of the vibratory screen and the main building apparatus is prolonged, and the shutdown time is reduced by over 60%, thus the apparatus can be put into production again, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of motor braking, in particular to the technical field of braking applicable to vibrating screen motors of asphalt concrete mixing equipment. Background technique [0002] The vibrating screen is a fine screening device for asphalt mixing equipment, driven by a three-phase asynchronous motor, its operation and braking performance directly affect the quality of the entire asphalt mixing equipment. During the free shutdown process of the vibrating screen of the asphalt mixing plant directly cutting off the power supply, due to the resonance effect of the vibrating screen, the shutdown process is unstable, and the amplitude of the resonance increases, which even causes the main building to shake, shortens the service life of the vibrating screen, and causes hot bones on the main building. Hazards such as cracking of the silo and deformation of the support of the main building; at the same time, the downtime of ...

AI Technical Summary

Problems solved by technology

During the free shutdown process of the vibrating screen of the asphalt mixing plant directly cutting off the power supply, due to the resonance effect of the vibrating screen, the shutdown process is unstable, and the amplitude of the resonance increases, which even causes the main building to shake, shortens the service life of the vibrating screen, and causes hot bones on the main building. Hazards such as cracking of the silo and deformation of the main building support; at the same time, the downtime of the vibrating screen is prolonged, and the waiting time for restarting the equipment is longer

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