RESEARCH ON INTEGRATED OPTIMIZATION METHOD FOR POWER LOSS AND ENERGY EFFICIENCY OF HYDRAULIC SYSTEMS

Анотація

Hydraulic systems are widely used in construction machinery and industrial manufacturing due to their high power density and rapid response, but high power loss and low energy efficiency hinder their green low-carbon development. To solve this problem, this paper proposes an integrated optimization method for power loss and energy efficiency of hydraulic systems. Firstly, three core loss sources (throttling, volumetric, mechanical) are analyzed, and a full-dimensional loss model considering their coupling relationships is established. Secondly, a multi-objective optimization model targeting maximum energy efficiency is constructed, with constraints including system dynamic performance (actuator speed, step response time), component operating parameters (rated pressure / flow of pumps / valves, cylinder thrust / stroke), and hydraulic oil characteristics (10–60 °C temperature, viscosity). An improved particle swarm optimization algorithm, featuring adaptive inertia weight, dynamic learning factors, and random boundary resetting, is adopted for solution. Finally, simulations via AMESim (variable pump-multi-way valve-double-acting hydraulic cylinder model) and experiments are conducted on an excavator boom hydraulic system. Results show the method increases comprehensive energy efficiency by 15.3 % and reduces total power loss by 21.7 %, balancing energy saving and operational stability, and providing theoretical and technical support for efficient hydraulic system operation.