Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (10): 2256-2264.doi: 10.13229/j.cnki.jdxbgxb20210478

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Characteristics of boom potential energy alternate recovery and utilization system of hydraulic excavator

Peng HU1(),Jian-xin ZHU1,2(),Chang-sheng LIU2,Da-qing ZHANG2   

  1. 1.State Key Laboratory of High Performance Complicated，Central South University，Changsha 410083，China
    2.R&D Center，Sunward Intelligent Equipment Co. Ltd. ，Changsha 410100，China
  • Received:2021-03-31 Online:2022-10-01 Published:2022-11-11
  • Contact: Jian-xin ZHU E-mail:hupeng3961@163.com;zjianx-918@163.com

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Abstract:

Aiming at the problem of heating and reliability of traditional energy recovery system， a potential energy interactive recovery system of excavator boom based on multiple hydraulic cylinders was designed， and its characteristics were researched. The working principle and energy characteristics of the boom potential energy interactive recycling system were analyzed. According to the operation characteristics of the 35 t excavator and the change of boom potential energy， the system parameters were designed based on the hydraulic cylinder and accumulator. Furthermore， the virtual simulation model of excavator energy recovery was established to analyze the operation characteristics and energy-saving efficiency of the system. Finally， an energy recovery system test platform was built to test the feasibility and energy efficiency characteristics of the system. The simulation and test results of single action of boom lifting show that， compared with the conventional excavator， the peak pressure of the main pump output of the energy recovery system is reduced by 57.8%， the energy-saving efficiency of the system is 51.5%， while the controllability of excavator remains good at the same time.

Key words: mechatronic engineering, hydraulic excavator, energy recovery, operating characteristics, parameter matching

CLC Number: 

  • TH39

Fig.1

Boom potential energy alternate recovery and utilization system"

Fig.2

Energy flow analysis of potential energy alternate recovery and utilization system"

Fig.3

Output power and energy curves of main pump under different accumulator volumes"

Fig.4

Pressure of rodless chamber of energy utilization cylinder under different accumulator pressure"

Fig.5

Simulation platform for energy recoveryexcavator"

Fig.6

Pressure curve of conventional system"

Fig.7

Pressure of potential energy alternate recovery and utilization system"

Fig.8

Comparison of boom operation characteristics"

Fig.9

Comparison of pump output power"

Fig.10

Comparison of pump output energy"

Fig.11

Comparison of boom operating point"

Fig.12

Experimental prototype of potential energy alternate recovery and utilization system"

Fig.13

Pressure curve of boom cylinder and accumulator"

Fig.14

Pressure test curve of pump"

Table 1

Comparison of single operation time of boom"

项 目动臂举升时间/s动臂下降时间/s

能量回收系统

常规系统

4.0

4.3

5.2

5.0

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