双层滑片回转运动机构的力学特性

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磨擦损失很小，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，减轻滑片的磨擦磨损，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的比的适宜值。

Dynamic Analysis of Double-Decked Vanes Mechanism

The dynamic characteristics of double-decked vanes mechanism are comprehensivel y analyzed with the aid of the developed model. The results demonstrate that the viscous loss between double-decked vanes is so small that can be neglected in practical design. By using doubledecked vanes mechanism, the binding forces, f riction loss and wear on vane tip can be decreased, but the vane stress can be increased. Thickness ratio of the upper vane to the lower is a key to the design of double-decked vane mechanism. By discussing the influences of the ratio on forces, friction, wear and strength of double-decked vanes, the suitable thic kness ratio is optimized.