,Scarifier Concrete Grinder,Concrete Scarifier Planer Grinder,Scarifying Concrete Machine NINGBO MAX MACHINERY CO.,LTD , https://www.max-machinery.com
First, the unpredictable safety slip conductors of wear are mostly made of current collector carbon brushes and conductive surface contact, through the friction sliding way to achieve continuous power supply. The wear rate of carbon brushes, the amount of wear, and the time of the ultimate wear are related to factors such as the frequency of use of the trolley wire, the working system, the working environment, the roughness of the conductive surface, and the size of the pressure, which cannot be monitored by humans. This unpredictable blackout after the carbon brushes wear out is always a problem to be solved in the use of current collectors.
Second, the ultimate risk of wear and tear on the trolley line collector in the carbon brush within the effective wear range is normal. However, after the carbon brush wears out, the static spring force is insufficient, the pressure is scarce, the resistance becomes large, and the contact is poor. From the dynamic point of view, the wear is gradual, the work is in motion, or even in the jogging state, so the starting current is large, plus the vibration during the movement, the installation of the trolley wire defects, deformation and other factors make the collector carbon brush and conductive The surface is like a touch, so it produces a strong spark, burning collector black, carbon brush frame deformation, sliding contact line conductive surface friction coefficient increases, affecting the conductive properties.
If the service life of the first current collector is one year, then the service life of the subsequent collector will be shorter and shorter due to the roughness of the conductive surface and the high current working environment of the crane. The practice of the use of the trolley wire has proven that if the design of the current collector only considers the power collection function and does not consider the ultimate hidden danger of carbon brush wear, the consequences will be serious.
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The trolley line refers to the trolley line body and the matching current collector assembly. Usually, the user's understanding of the quality of the trolley line is often limited to the body, and the collector is considered to be a consumable product, which can be replaced with a new one. This knowledge masks the fact that the current collector has a great hidden danger after the carbon brush wear life is terminated. This article mainly through the analysis of the collector, re-understanding the importance of collectors, and propose solutions.