三轮非圆同步带传动试验台设计与应用

为了测试三轮非圆同步带传动机构的传动性能,并获取其传动精度,设计了三轮非圆同步带传动性能测试试验台,并进行试验研究。三轮非圆同步带传动试验台以工控机为主控、步进电机为动力,能够实现转速、负载和中心距可调和试验数据采集、实时显示、统计和分析的功能。定义了传动周期偏差率和传动比精度偏差率两指标,用于衡量三轮非圆同步带的传动性能。试验表明,试验台能够完成不同工况的三轮非圆同步带传动测试,负载和速度均影响传动比精度偏差率和传动周期偏差率,对传动周期偏差率的影响更大;当转速在0~300 r/min、转矩在0~50 N·m范围内时,试验所得主-从动轮传动比与理论传动比基本一致,主-从动轮传动周期偏差率为0.80%~4.80%、主-从动轮传动比精度偏差率为0.18%~1.23%;当转速为80 r/min、负载转矩为16.25 N·m时,其传动比精度偏差率0.18%、传动周期偏差率0.80%,为此试验范围内的最佳传动工况。

Design and Application of Three-pulley Noncircular Synchronous Belt Transmission Test Rig

In order to test the transmission performance of the three-pulley noncircular synchronous belt transmission mechanism and obtain its transmission accuracy, a three-pulley noncircular synchronous belt transmission performance test bench was designed and tested. The three-pulley noncircular synchronous belt transmission test bench was mainly controlled by an industrial computer and stepper motors. It can realize the functions of adjustable speed, load and center distance, real-time display, collection, statistics and analysis of test data. Two indexes of transmission cycle deviation rate and transmission ratio accuracy deviation rate were defined, which were used to measure the transmission performance of the three-pulley noncircular synchronous belt. It was found through experiments that the test bench can realize three-pulley noncircular synchronous belt transmission test under different working conditions, and the size of load and speed affected the transmission ratio accuracy deviation rate and transmission cycle deviation rate, and had more influence on the transmission cycle deviation rate. When the speed was in the range of 0~300r/min and the torque was in the range of 0~50N·m, the test drive-driven wheel transmission ratio was basically consistent with the theoretical drive ratio;the drive-driven wheel transmission cycle deviation rate was 0.80%~4.80%. The accuracy deviation rate of the driving ratio between the main and driven wheels was between 0.18% and 1.23%;when the speed was 80r/min and the load torque was 16.25N·m, the accuracy deviation rate of the transmission ratio was 0.18%, and the transmission cycle deviation rate was 0.80%, which was the best transmission condition within the test range.