我厂生产的B_1—725、M_1—725型斜轴式轴向柱塞泵和马达,是为采煤机牵引部和液压绞车等配套的。76年试制成功以后已经批量生产。这种泵和马达转子与配油盘之间的予压紧力是靠一组(六片串联)碟形弹簧来实现的。从前,由于我们缺乏经验,对这组弹簧的重要性认识不足,设计图纸上要求的不严,如图1所示。 The B_1-725, M_1-725 inclined axis axial piston pump and motor produced by our factory are matched with the traction unit and hydraulic winch of shearer. After 76 years of trial success has been mass production. The preload between the pump and motor rotor and the oil pan is achieved by a set of (six in series) disc springs. In the past, due to our lack of experience, we did not know enough about the importance of this group of springs and the strict requirements on the design drawings, as shown in Figure 1.