偏心轮型孔轮式排种器排种油菜极限转速试验

为实现通过转速来调节排种器变量排种的要求，并为设计高速、高性能播种机提供理论依据，在排种性能试验台上针对一次播三行的偏心轮型孔轮式排种器进行了油菜排种极限转速试验。试验研究了排种器的排量、排种均匀性、各行排量一致性与排种转速之间的关系及该排种器正常工作的极限转速，建立了该排种器单位时间的排量与转速的数学模型，试验表明：该排种器排种排种油菜时最高转速不超过70 r/min，最低转速不低于30 r/min，在该转速范围内，其排种均匀性为13.09%～30.09%，各行排量一致性为3.28%～4.70%，单位时间的排种量与转速呈线性关系。该结论为设计油菜高速播种机提供了试验基础，同时为进一步研究通过转速调节播种量提供了理论依据。

Test on limit turning speed of eccentric round hole-wheel seedmeter for rape

In order to adjust seeding rate via the rotate speed and provide with the theories for designing high-speed and high performance seeder, the limit turning speed test was done. The test aimed at the eccentric round hole-wheel seedmeter seeding three rows each time on the performance test bed. The test studied the limit rotate speed in working order and the relation between the rotate speed and seeding amount, seeding uniformity and the consistency of total seeding amount in each row, respectively, and set up the mathematical model about the relationship between unit seeding amount and speed. The results showed that the limit turning speed did not exceed 70 r/min and the lowest turning speed was not less than 30 r/min. Its seeding uniformity was 13.09%-30.09% and the consistency of total seeding amount in each row was 3.28%-4.70%. There was a linear relation between unit seeding amount and speed. The results provide data and theory for designing a rape high-speed seeder and further study on the rotate speed and seeding quantity.