Transmission Characteristics and Experiment of Hydraulic–Mechanical Transmission of Cotton Picker

Huajun Chen, Meng Wang, Xiangdong Ni (), Xiangchao Meng, Wenqing Cai, Yiqing Li, Baoyu Zhai, Hongbin He and Yuyang Wang
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Huajun Chen: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Meng Wang: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Xiangdong Ni: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Xiangchao Meng: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Wenqing Cai: College of Information Science and Technology, Shihezi University, Shihezi 832003, China
Yiqing Li: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Baoyu Zhai: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Hongbin He: College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Yuyang Wang: School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China

Agriculture, 2024, vol. 14, issue 8, 1-19

Abstract: To overcome the issue of unstable speed output encountered by cotton pickers operating in harsh environments and subject to frequent external load fluctuations, a hydraulic–mechanical transmission (HMT) for cotton pickers is proposed in this study. By analyzing the driving system of the cotton picker, a Lavira-based HMT scheme is developed. The matching characteristics of the HMT speed ratio are analyzed, a continuity and smoothness test of the speed ratio of the changing segment is carried out, and the influence law of smoothness of the HMT changing segment is discussed. The results show that the HMT system effectively satisfies the driving speed requirements for both field harvesting and road transportation of cotton pickers. The HMT speed ratio is continuously controllable and the design is reasonable. The HMT load torque and the oil pressure in the main oil circuit have a significant impact on the smoothness indicators of speed reduction and dynamic load. Additionally, the flow rate of the governor valve has a notable effect on the smoothness indicator of sliding friction power. However, the engine’s output speed has no significant influence on the HMT’s smoothness. This research can provide theoretical support for the development and design of cotton picker gearboxes and the transmission characteristics and experimental research of off-road vehicle gearboxes.

Keywords: cotton picker; hydraulic–mechanical transmission; transmission characteristic; experiment; shift smoothness (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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