(一) 东风型机车的主机油泵分斜齿和人字齿两种,并以斜齿居多。斜齿主机油泵的轴承选配只考虑了机械传动的轴向受力状态,忽略了斜齿轮在泵中的轴流作用所产生的轴向力。当泵运转时,轴流作用所产生的轴向力把斜齿轮推向7608轴承侧,使齿轮的端面与轴承座板产生接触摩擦,增加了传动轴、齿套、传动齿轮的负担。泵的转速越高,摩擦阻力越大,负担越重,轴承座板磨耗越快。斜齿轮的轴向位移的 (A) Dongfeng locomotive main pump sub-helical gear and herringbone two, and mostly skewed teeth. Helical gear pump bearings bearing only consider the mechanical transmission of the axial force state, ignoring the helical gear in the pump axial force generated by the axial force. When the pump is running, the axial force generated by the axial flow pushes the helical gear to the bearing side of the 7608, causing the friction between the end face of the gear and the bearing seat plate to increase the load on the transmission shaft, the gear sleeve and the transmission gear. The higher the pump speed, the greater the frictional resistance, the heavier the burden, the faster the bearing plate wear. Axial displacement of helical gears