What is the buoy counterweight of jigging coal washer related to?

The buoy counterweight of jig coal preparation machine is related to the limit sleeve.

At present, the commonly used buoy is a straight rod buoy, on which a counterweight is added, and the buoy is forced to move up and down mainly by a limiting sleeve. Because the buoy cannot rotate in the horizontal plane, the friction between the sleeve and the buoy increases.

Jig: Jig has been used in the history of coal preparation for more than 100 years, and manual jig appeared in 1830.