建立双层滑片运动机构的力学模型 ,并全面分析其力学特性。通过分析发现 ,与机械摩擦损失相比 ,双层滑片之间相对运动产生的粘性摩擦损失很小 ,可以忽略不计 ;采用双层滑片能够明显改善滑片端部的密封效果 ,减轻滑片的摩擦磨损 ,但滑片应力有所增加 ,强度有所降低 ;厚度比对双层滑片的受力及摩擦磨损影响很小 ,只对强度产生较大影响。从增加强度和便于加工的角度考虑 ,优化出双层滑片机构厚度比的适宜值 The mechanical model of the double-slider motion mechanism is established and its mechanical properties are analyzed comprehensively. Through the analysis, compared with the mechanical friction loss, the relative frictional loss caused by the relative movement between the double-layer slides is negligible, and the double-layer slides can obviously improve the sealing effect of the slides at the ends of the slides Friction and wear, but the vane stress increased, the strength decreased; the thickness ratio of the double-layer vane force and friction and wear has little effect, only a greater impact on the strength. From the perspective of increasing the strength and ease of processing, the optimum value of the thickness ratio of the double-layer slider mechanism is optimized