| Hydraulic transmission technology is widely used in engineering machinery,automotive manufacturing,mechanical processing,aerospace,national defense equipment and other key fields.Compared with other transmission technologies,hydraulic transmission technology can transmit higher power and greater force in a smaller volume,while its motion inertia is low and the response speed is fast.However,due to the complexity of energy conversion of hydraulic transmission,it is inevitable that there are various types of losses such as volume,pressure and machinery in the transmission process,resulting in a large amount of energy waste.In the hydraulic energy-saving system currently designed,the hydraulic energy storage components are all conventional hydraulic accumulators.hydraulic accumulator still has many problems,such as low energy density of accumulator,large pressure fluctuation in the process of hydraulic energy absorption/release,etc.In view of these problems,this paper carries out the design and analysis of the active hybrid hydraulic energy storage component,an active hybrid hydraulic energy storage component is proposed,and a simulation model is built for the frequent lifting of the hydraulic excavator boom by taking a small hydraulic excavator as the experimental object.The energy efficiency and feasibility of an active hybrid hydraulic energy storage component are deeply studied.The main research contents of this paper are as follows:(1)Firstly,the problem of gravitational potential energy recovery and reuse of hydraulic excavator boom is analyzed and discussed,and a new type of active energy storage component is proposed as an energy storage device.The structure of the active energy storage component and the working principle of energy recovery and reuse are introduced in detail,and the related mathematical model is established.(2)Establish no-accumulator mode Ⅰ、hydraulic accumulator mode Ⅱ and active energy storage component Ⅲ simulation model and parameter settings,At the same time,the related mathematical models of the main hydraulic components are established.(3)Based on SWE-17ED test platform to verify no-accumulator model Ⅰ the reliability of the simulation model,And on this basis to build and verify model of hydraulic accumulatorⅡ and active energy storage component Ⅲ the reliability of the simulation model.(4)By analyzing the working process and energy efficiency of the energy recovery and reuse in various working modes of the active energy storage component,it is concluded that BE is the best in all aspects of efficiency.(5)It can be known through calculation and analysis works for the active energy storage component Ⅲ mode B-E recovery efficiency,reuse efficiency and regeneration efficiency are 56.77%,97.06%and 55.1%respectively.The recovery efficiency,reuse efficiency and regeneration efficiency of hydraulic accumulator mode Ⅱ are 42.81%,96.01%and 41.1%respectively.Since active energy storage components have multiple working states during energy recovery and reuse,suitable working states can be selected according to system needs to improve energy utilization.Through the analysis of known active energy storage component model Ⅲ works in the energy saving effect of B-E is better than the energy saving effect of hydraulic accumulator Ⅱ. |
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