圆形微织构表面协同作用机理研究

为了研究多个织构之间的协同作用机理，首先用UMT-3摩擦试验机得到相应的实验结果，来确定织构表面的油膜厚度，再通过雷诺方程对九孔织构模型进行仿真，并且与单孔织构模型进行对比，证明协同效应的存在。协同作用会降低中心织构的压力峰值，同时减小其空化程度，当这两种影响达到平衡时得到圆形织构的最佳深径比，接触副表面摩擦性能最佳。经研究发现，当微织构尺寸增大，油液运动速度加快时，协同作用增强，此时单孔织构模型精度明显下降。因此，合理化织构设计需要考虑协同效应的影响。

Mechanism of Synergism on Surface of Circular Micro-textures

In order to study synergistic mechanism between multiple textures, a UMT-3 friction tester is used to obtain the corresponding experimental results to determine oil film thickness on texture surface. The Reynolds equation is then used to simulate a nine-pocket-texture model and a single-pocket texture-model. The texture models are compared to prove the existence of synergy effects. The synergistic effect reduces the pressure peak of central texture and degree of cavitation. When these two effects reach equilibrium, the best depth-to-diameter ratio of circular texture is obtained, and the contact surface has the best frictional performance. We find that when the micro-texture size increases, and the oil movement speed is accelerated, the synergistic effect is enhanced, and the accuracy of single-hole texture model is significantly reduced at this time. Therefore, rationalizing the texture design needs to consider the effects of synergy.