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Manipulating stability of new electro-hydraulic system in tractors |
1. College of Engineering, China Agricultural University, Beijing 100083, China; 2. Test & Research Center of Xuzhou Construction Machinery Group, Xuzhou, Jiangsu 221004, China)
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Abstract To solve the problem of strong hydraulic pressure impact and pitch oscillation in tractor's hydraulic hitch system, a dynamic pressure feedback loop is proposed. The loop is made up of an accumulator and a damping hole, which are mounted near the hydraulic cylinder of the hydraulic system in the tractor. In this study, the parameter matching of the loop is discussed in detail. The manipulating stability of the new electro-hydraulic system can be improved. The experimental results show that the pitch angle velocity of the tractor and the pressure impact in the hydraulic system are the main factors that influence the manipulating stability of the new electro-hydraulic system, and both are decreased significantly. In conclusion, the new electro-hydraulic system with the dynamic pressure feedback loop is practical, and can be applied in the tractor's hitch system.
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