Research On The Potential Energy Recovery System Of Electric Forklift And The Vibration Characteristics Of Accumulator Installation Device

Electric forklift is a common loading and unloading transport vehicle in the logistics and storage chain,its energy-saving technology is one of the key areas of forklift energy efficiency research.Based on the engineering background of the traditional electric forklift lifting system with long-term load potential energy waste,this paper designs a new potential energy recovery system for electric forklift that can realize hierarchical energy recovery and reuse under mixed load conditions.The main parameter variables and energy-saving efficiency of the new potential energy recovery system are optimized by using AMESim software,at the same time,an optimization model of optimal energy-saving efficiency under continuous load conditions is established,and the energy-saving efficiency of the new potential energy recovery system is optimized.In the UG NX advanced simulation environment,the vibration characteristics of the hydraulic accumulator installation in the potential energy recovery system are analyzed,which provided reference for the stability study of the energy storage components of the new potential energy recovery system in practical engineering applications.The main contents of this paper are as follows:1?Based on the working principle of the traditional electric forklift hydraulic system,the actual operation energy recovery consumption and the basic performance of common energy storage components,a new potential energy system of electric forklift that can realize the classification energy recovery and reuse under mixed load conditions is designed.The new system adopts the coordinated operation of high and low pressure accumulators to achieve the purpose of hierarchical recovery of potential energy under mixed load conditions.2?The energy efficiency of the new potential energy recovery system of electric forklift was optimized by using AMESim software,and the optimal design of key parameters of the energy recovery system was realized.The simulation model was used to systematically analyze the feasibility and energy saving factors of the new energy-saving system.By comparing the energy saving rate of the new potential energy recovery system with optimal parameters and the energy saving system of single high-pressure and low-pressure accumulator under mixed load conditions,the good engineering adaptability of the new potential energy recovery system is verified.The new potential energy recovery system not only meets the lifting performance of electric forklift under mixed load conditions,but also achieves higher energy efficiency than a single accumulator energy-saving system.3?Aiming at the energy-saving efficiency of the new potential energy recovery systemunder continuous load conditions,a mathematical model of optimal energy-saving efficiency under different loads is proposed.Based on the mathematical model,an optimization model for energy-saving efficiency of potential energy recovery system under continuous load is established,and the optimal design of energy-saving efficiency of the new potential energy recovery system under continuous load is realized.4 ? Taking the installation device of the key energy storage component(hydraulic accumulator)in the new potential energy recovery system scheme as the research object,the influence of the structure of the installation device on the accumulator stability is analyzed,which provided reference for the study of accumulator stability in practical engineering applications.The free mode and constrained mode of two typical hydraulic accumulator mounting devices are solved by UG NX software.The method of improving the stability of the accumulator installation device is found by free modal analysis,which provides the basis for the selection of the constrained position of the device.At the same time,the frequency response analysis,transmission analysis,transient analysis and random analysis of the two hydraulic accumulator devices were carried out,obtained the resonance frequency of the U-shaped hoop device and the fastening hoop device,and the D-level road spectrum was used as the actual operation of the forklift excitation source,studied the stability of the two installation devices in practical engineering applications,and the results show that the fastening hoop device has faster response attenuation,higher resonance frequency and better stability than the U-shaped hoop device.