活塞式蓄能器在超大型液压打桩锤上的应用研究  

Research on Application of Piston Accumulator on Ultra Large Hydraulic Pile Hammer

作　　者：冯小星 李泽 梅卫东 季鹏 彭熙伟[2] 唐永卫 FENG Xiao-xing;LI Ze;MEI Wei-dong;JI Peng;PENG Xi-wei;TANG Yong-wei(Jiangsu Longyuan Zhenhua Maring Engineering Co.,Ltd.,Nantong,Jiangsu 226014;School of Automation,Beijing Institute of Technology,Beijing 100081;Fujian Longyuan Offshore Wind Power Generation Co.,Ltd.,Putian,Fujian 351100)

机构地区：[1]江苏龙源振华海洋工程有限公司,江苏南通226014 [2]北京理工大学自动化学院,北京100081 [3]福建龙源海上风力发电有限公司,福建莆田351100

出　　处：《液压与气动》2024年第6期179-188,共10页Chinese Hydraulics & Pneumatics

基　　金：江苏省工业和信息产业转型升级专项资金(2022LYZH)。

摘　　要：活塞式蓄能器作为液压打桩锤补偿峰值流量的辅助动力源,对液压打桩锤的动态特性有重要影响。为了优化液压打桩锤的动态特性,对双作用液压打桩锤的工作原理进行了分析,阐述了蓄能器类型的选择依据,对蓄能器容积、充气压力参数计算进行了理论分析。针对液压打桩锤打击过程中流量、压力动态变化大及流量、压力非线性耦合的特性,基于AMESim软件平台建立液压打桩锤仿真模型,以4400 kJ超大型液压打桩锤的相关数据为基础,确定仿真参数,研究蓄能器充气压力分别为18、 14 MPa条件下,对锤芯位移、速度、加速度等动态特性的影响。仿真结果表明,蓄能器充气压力18 MPa,打击过程中液压缸无杆腔峰值流量不足,最大打击速度5.5 m/s,最大打击加速度14.1 m/s^(2);而蓄能器充气压力降低到14 MPa,无杆腔没有出现供油不足现象,最大打击速度6 m/s,最大打击加速度14.2 m/s^(2),实现了打击速度快、系统稳定性好的控制效果。As an auxiliary power source for compensating the peak flow rate of hydraulic pile hammers,piston type accumulators have a significant impact on the dynamic characteristics of hydraulic pile hammers.In order to optimize the dynamic characteristics of hydraulic pile hammers,the working principle of double acting hydraulic pile hammers is analyzed,and the basis for selecting the type of accumulator is elaborated.Theoretical analysis is conducted on the calculation of accumulator volume and inflation pressure parameters.Aiming at the characteristics of significant dynamic changes in flow and pressure during the impact process of hydraulic pile hammers,as well as non-linear coupling of flow and pressure,a simulation model of hydraulic pile hammers is established based on the AMESim software platform.Based on the relevant data of 4400 kJ ultra large hydraulic pile hammers,simulation parameters are determined to study the influence of charging pressures of 18 and 14 MPa on the dynamic characteristics of hammer core displacement,velocity,acceleration,etc.The simulation results show that under the condition of charging pressure of 18 MPa,the peak flow rate of the rodless chamber of the hydraulic cylinder is insufficient during the striking process,with a maximum striking speed of 5.5 m/s and a maximum striking acceleration of 14.1 m/s^(2);When the charging pressure of the accumulator is reduced to 14 MPa,there is no insufficient oil supply in the rodless chamber during the striking process,the maximum striking speed is 6 m/s,and the maximum striking acceleration is 14.2 m/s^(2),achieving a control effect of fast hitting speed and good system stability.

关 键 词：液压传动 液压打桩锤 蓄能器 

分 类 号：TH137[机械工程—机械制造及自动化]