立体车库提升系统过卷保护研究

针对在实际工作中提升机过卷事故导致的立体车库提升系统的不安全问题,分析了提升系统的薄弱环节,并对其进行结构优化,提出一种新的轴承座安装方式;为完善立体车库提升机过卷缓冲系统,设计了一种过卷缓冲装置的液压系统,利用AMESim建立了系统仿真模型,分析溢流阀不同开启压力下过卷缓冲装置的性能,确定了溢流阀较理想的开启压力为8 MPa,并得到较理想开启压力下的被提升装置的速度变化曲线和缓冲油缸压力曲线.结果表明,当溢流阀开启压力为8 MPa时,缓冲时间为1.5s,缓冲位移为0.52 m,振动幅度为0.1m,过卷缓冲装置吸收了被提升装置的液压冲击,降低了被提升装置在终点的振动幅度,达到提升系统过卷保护的目的.

Study on Overwinding Protection of Stereo Garage Lifting System

In order to solve the insecurity problem of the stereo garage lifting system caused by the accident of hoister overwinding in the actual work process,by analyzing the weak position of lifting system,and optimizing its structure,a new way of bearing installation is put forward.To perfect the overwinding buffer system for stereo garage lifting machine,a hydraulic system of the overwinding buffer device is designed,system simulation model is established by AMESim.The response performance of system is analyzed with the different cracking pressure of relief valve.The ideal cracking pressure of relief valve is determined as 8 MPa,and the speed change curve and buffer oil cylinder pressure curve are given at the ideal cracking pressure.The results show that when the relief valve opening pressure is 8 MPa,the buffer time is 1.5 s,the buffer displacement is 0.52 m,the vibration amplitude is 0.1 m,and the overwinding buffer device absorbs the hydraulic shock of the lifting device,and reduces the vibration amplitude of the lifting device at the end point.The purpose of overwinding protection of the stereo garage lifting system is realized.