武山铜矿一台20m~3空压机在使用过程中,155kW 电动机轴疲劳断裂。断裂部位在电动机轴输出端轴承内侧处,齐根断裂,贝状断口。如另锻制一根圆棒与转子轴打坡口对焊,工艺难度大,质量难以保证。在这种情况下,我们采取过盈配合接轴方案。首先,在转子轴待接端截短60mm,车削出直径φ110h6长度140mm的配合面,见图1。同时,制作接轴坯,接轴坯先把直径φ170及直径φ110U_7长度142mm配合面加工到图纸要求,见图2,转子轴与接轴坯 Wushan Copper Mine a 20m ~ 3 air compressor in use, 155kW motor shaft fatigue fracture. Broken parts in the motor shaft output bearing inside the Department, Qi root fracture, shell-shaped fracture. If the other forging a round bar and rotor shaft beveling butt welding process difficult, quality is difficult to guarantee. In this case, we take the interference fit shaft solution. First of all, the rotor shaft to be connected end truncated 60mm, turning out the diameter φ110h6 length 140mm mating surface, shown in Figure 1. At the same time, the production of joint billet, shaft billet First diameter φ170 and diameter φ110U_7 length 142mm mating surface processing requirements of the drawings, shown in Figure 2, the rotor shaft and the shaft blank