Creative structure of bearing support in coal powder conveyor

Abstract The breakdown of the screw coal powder conveyor’s bearing support in the power plant boiler underwent four stages: axial displacement of the transmission shaft sleeve, shaft sleeve wearing by the retainer ring and the bearing, and shaft sleeve wearing by dustproof felts and skeleton sealing. The refurbishment structure was created by examining the wearing characteristics of each component. By creating a convex sidestep on the shaft sleeve, the bearing settling method was modified from utilizing retainer rings to the locking nut and gasket, which stopped the transmission shaft sleeve from drifting. The bolt connection fastening the covers to the bearing support body was chosen as a replacement for the welding assembly to make it easier to repair the worn sealing materials during installation and disassembly. After the coal powder conveyor bearing support was renovated, the screw coal powder manufacturing line of the 100 MW power plant boiler had good operating effects. There was no line vibrating, coal leaking, noising, or locking, which significantly reduced the cost of repairs and ensured the safety and steady production of electric power.