含间隙三球销副机构的实验研究

为了验证间隙模型的合理性与仿真计算的可靠性 ,研制了含间隙三球销副的曲柄滑块实验装置 ,采用电涡流传感器、加速度计等对各种转速和不同间隙下的驱动力矩、附加位移、振动加速度等进行了测量。被测信号采用 DP16系统同步记录 ,直接编程处理。结果表明 ,实验结果与理论计算具有较好的一致性。另外 ,对可能影响实验结果的各种误差进行了分析。这些结果有利于进一步修正理论模型 ,并从实验角度更深入分析间隙对机构的动态作用

An experimental investigation of a mechanism with clearance in tripod-ball sliding joint

An experimental rig for studying the effect of the joint clearance was set up in order to testify the accuracy of clearance model and the reliability of numerical simulation. The parameters such as additional displacements, driving torque, speed and acceleration of the slider were measured simultaneously using eddy current transducers, accelerometers, etc. The signals were recorded with DP16 data acquisition system, and were processed directly by special software. The experimental results show good agreement with the theoretical ones. Furthermore, the factors which have influence on the results are discussed. The conclusions are useful for modification of clearance model and further dynamic study of the mechanism including joint with clearance.