School of Technology,Beijing Forestry University,Key Laboratory of Forestry Equipment and Automation,State Forestry and Grassland Administration,Beijing 100083,China
During the hydraulic cylinder lowering process of forestry logging heads, a large amount of gravitational potential energy is converted into thermal energy through the throttling effect of the control valve, which is dissipated. In addition, the no-load idle operation of the hydraulic pump in the non working state of the system also causes energy waste, leading to significant energy loss. In response to the above issues, this article proposes an energy recovery system for the forestry logging head pitch hydraulic cylinder based on AMESim. The system recovers and reuses the gravitational potential energy and kinetic energy of the logging head pitch hydraulic cylinder under no-load conditions through the combination of high and low pressure accumulators and load sensitive pumps, in order to reduce system energy consumption. The experimental results show that within one working cycle, the energy output of the load sensitive pump and the conventional quantitative pump in the same working cycle is reduced by 32.04% compared to the original system. Under the action of high and low pressure accumulators, the movement speed oscillation of the hydraulic cylinder piston rod is effectively slowed down, reducing the impact of the oil cylinder during logging operations. In addition, an energy recovery of 51.402 kJ is achieved within one working cycle, significantly optimizing the energy-saving performance of the system.
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