Design and Test of Pitching Seeding Unit Profiling Performance Testing Bench

YI Shujuan, LI Yikai, CHEN Jiguo, WANG Song, ZHAO Bin

Abstract

In order to solve the problem that it is difficult to test the performance of seeding unit profiling mechanism，a pitching seeding unit profiling performance testing bench was designed.The composition and working principle of the test bench were described，and the high-speed transmission system，hydraulic lifting system，monitoring system and key components were designed. ANSYS Workbench was applied to carry out static analysis and modal analysis on the whole test stand and key components to verify the reasonableness of the structural design.In order to test the actual testing effect of the pitching seeding unit profiling performance testing bench，taking the seeding unit of Debont 1205 tractor-type no-till precision planter as the research object，the first test was carried out with the hydraulic rod extension and conveyor belt speed as the test factors，and with the error of the monitoring system as the evaluation indexes.After confirming the accuracy of the monitoring system，the maximum error of angle sensor of the monitoring system was 0.69mm within the range of hydraulic rod extension of 0~200mm，and the maximum error of the photoelectric encoder was 0.18km/h within the range of conveyor belt speed of 8~19km/h. After confirming the accuracy of the monitoring system，taking the speed of the monocoque as the test factor，the data of the land’s undulation curve was collected at speeds of 8km/h, 10km/h and 12km/h for the objective of the test curve，the absolute error average of the terrain undulation simulation curve as an indicator of the single-factor test，the test concluded that the designed test bench can effectively simulate the field ground undulation frequency and the amount of undulation，the absolute error average value was 1.86mm, which can meet the needs of seeding monomer profiling performance testing.

 

Keywords: high speed seeder, profiling mechanism, test bench, farmland topography, hydraulic system

 

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