振动对气吸式水稻排种器性能的影响OA

[Objective]This study aims to systematically investigate the mechanism by which vibration affects the performance of a vacuum seed meter for rice,providing a theoretical basis for its field adaptability enhancement and structural optimization.[Method]The three-dimensional(X,Y,Z)vibration characteristics of a precision rice planter during paddy field operation were obtained using a field vibration signal acquisition system.Based on a vibration test apparatus for vacuum seed meter,tests were conducted under various combinations of vibration frequency(10-100 Hz),amplitude(0.2-4.0 mm),metering shaft rotational speed(20-60 r·min-1),and vacuum pressure(1.6-3.6 kPa).The miss-seeding rate,single-seed rate,double-seed rate,triple-seed rate and multi-seed rate were calculated to analyze the influence of vibration on seeding performance indicators.[Result]The root mean square of acceleration in the X,Y and Z directions for the field machinery vibration signals were 1.79-2.08,1.32-1.64,and 0.78-1.01 m·s-2,respectively.Vibration test results indicated that under low vacuum pressure(1.6 kPa),vibration significantly increased the miss-seeding rate(P<0.05).However,as vacuum pressure increased to 3.6 kPa,the miss-seeding rate decreased to 0.37%-4.44%,with the impact of vibration markedly diminishing.Vibration generally increased the single-seed rate(by dislodging the unstably attached second seed due to disturbance)while reducing the triple-seed rate(as the third seed became unstable and fell off).However,under high vacuum pressure,certain vibration conditions increased the double-seed rate.Vibration significantly interfered with both the seed filling and seed carrying stages,primarily by applying additional forces that disrupted the suction equilibrium of seeds.[Conclusion]The vacuum seed meter for rice maintains high stability and reliability under vibrating conditions.Subsequent research should optimize the seed meter structure to minimize the impact of inter-seed forces on suctioned seeds,thereby reducing the required vacuum pressure under vibration operation.