Overhead crane working speed includes lifting speed, trolley travelling speed, overhead crane travelling speed. Working speed is influenced by many factors.
First, it is related to the weight. The overhead crane with small and medium lifting can adopt high speed to improve efficiency, the overhead crane with heavy lifting is suitable to choose low speed to reduce driving-power and improve travelling stability and safety.
Working speed is also related to working class and working requirement. The overhead crane with high class, frequent use and high efficiency can adopt fast speed, working mechanism with low class and adjusting purpose can adopt low speed. The overhead crane only used for equipment installation and maintenance can choose low speed.
According to practical needs, it can also adopt double speed (high and low speed), dead speed or adjustable speed. What's more, working speed is also related to working room. The overhead crane with long travelling distance, high lifting height is suitable for high speed. The overhead crane with short travelling distance is not suitable for high speed. With development of industry, the overhead crane with much transporting work mostly adopts high speed.
The overhead crane used for installation and maintenance adopts adjustable speed. For some overhead cranes with special functions, such as the overhead crane for quench, should has fast-down device, for overhead crane with high lifting height, it should improve lifting speed, adopt low speed for heavy material, high speed for no-load, or high down-speed to increase efficiency.
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