湿式离合器流场与作用力模型试验研究

Axial and circumferential forces affect the performance of the wet clutch in the wide speed range. Aiming at the evolution of drag torque and axial force inside wet clutch, according to the simplified structure of the wet clutch system, a model experimental device for the visualization of the flow field and the force test of the wet clutch is developed. The evolution process of the flow field is analyzed through the experimental test. The parameter effects on the torque and axial force is obtained. The results indicate that the flow field consists of two main flow patterns: the full liquid flow and the gas-liquid stratified flow. A stable boundary can be formed between the full liquid phase and the full gas phase. With the increase of the rotating speed, the decrease of the flow rate and the increase of the disk clearance, the oil volume fraction in the flow field decreases. The two-phase boundary moves inward. The flow rate and the disk clearance have a significant effect on the turning point of the drag torque. The reducing of the flow rate and the increasing of the clearance can reduce the rotation speed of the turning point. With the increase of the rotating speed, the decrease of the flow rate and the increase of the disk clearance, the axial force shows a downward trend. Around the turning point of the drag torque, the direction of the axial force changes. The axial force almost reduces to zero with the further increase of the rotating speed.