Experimental study on driver seat vibration characteristics of crawler-type combine harvester

By Lizhang Xu, Xiaoyu Chai, Zhipeng Gao, Yaoming Li, Yading Wang. International Journal of Agricultural and Biological Engineering, 2019

57 citations recorded by the source corpus.

To improve the driving comfort of combine harvesters, driver seat low-frequency vibration and related driver ride-comfort problems were investigated on a Chinese CFFL-850 crawler-type full-feed combine harvester based on ISO2631. Driver vibration and driving seat transmission characteristics were measured under the following conditions: no-load idling, driving on the road, driving in the field, and simulated harvesting. The root mean square values composite vibration under four conditions were 3.63 m/s2, 2.35 m/s2, 3.34 m/s2, and 2.67 m/s2, respectively. For the same condition, the maximum root mean square scores of vibration component on driver whole-body occurred in the seat support surface (test point 1) and vertical direction (Z direction), which were 3.56 m/s2, 2.05 m/s2, 3.15 m/s2, and 2.43 m/s2, respectively. The test point 2 to test point 1 vertical-transfer function curve trends were nearly identical. Nearly all of the transfer coefficients were greater than 1 in the range of 1-50 Hz, therefore, the seat vibration attenuation performance was poor. Based on the analysis results, the driver seat structure was altered and a verification test was performed. The test results indicated that after an X-damping mechanism was installed, vibration acceleration, on the surface of the seat support under the road-driving conditions, decreased from 2.35 m/s2 to 1.68 m/s2. Under the simulated harvesting condition, the vibration acceleration decreased from 2.56 m/s2 to 1.46 m/s2. Nearly all of the seat vertical transfer coefficients were less than 1 within the frequency range of 1-80 Hz, therefore the dynamic comfort of the seat was ameliorated after structural improvement. Keywords: crawler-type combine harvester, driver seat, vibration characteristics, ride comfort, damping, structure optimum DOI: 10.25165/j.ijabe.20191202.3657 Citation: Xu L Z, Chai X Y, Gao Z P, Li Y M, Wang Y D. Experimental study on driver seat vibration characteristics of crawler-type combine harvester. Int J Agric & Biol Eng, 2019; 12(2): 90–97.

Subfields: Mechanical Engineering, Orthopedics and Sports Medicine

View Paper: https://www.semanticscholar.org/paper/9df3adb3ad7c9f0794ac3be012922c8af2ceb526