Authors

Abstract

Aiming at real time rotation speed control of threshing drum and cleaning fan for combine harvester, a stepless speed regulation mechanism was developed. Test show that the adjustable range of fan was 600～1150 r/min, average adjustment speed was 9.2 r/s, the absolute error of stable speed was less than 0.72 r/min. The average speed response time was 1.33s, the overshoot was less than 8 r/s. The adjustable range of the drum was 700～1100 r/min and the average adjustment speed was 2.1 r/s. The absolute error of stable speed did not exceed 0.62 r/min, and the maximum relative deviation was 0.38%.

Abstract in English

针对联合收割机脱粒滚筒和清选风机转速实时控制问题,研制了一种无级调速系统.试验表明,风机的调速范围为600～1150rad/min,平均调节速度9.2rad/s,稳定转速的绝对误差小于0.72rad.平均转速响应时间为1.33s,超调量小于8rad/s.风机转速的可调范围为700～1100rad/min,平均调节速度为2.1rad/s,稳定转速绝对误差不超过0.62rad,最大相对误差为0.38%.