自动猫道起升系统动力学模型与分析

在对钢丝绳拉升式自动猫道进行现场试验时发现钢丝绳载荷波动明显,无法完成目标重量管柱的起升.为此,分析了钢丝绳拉升式自动猫道的结构与运动特性,并基于达朗贝尔原理建立了自动猫道的动力学模型,采用MATLAB软件进行数值求解并分析了基座上挡块与坡道底端的距离、移送臂与支撑臂的铰接位置、支撑臂长度对钢丝绳载荷的影响,分析得出将基座上挡块调整至坡道底端、合理降低支撑臂长度能有效降低起升过程所需钢丝绳拉力.依据分析结果调整自动猫道结构尺寸后进行现场试验,液压绞车的最大起升油压下降超过2 MPa,自动猫道机起升能力得到提高.该分析与实验结果可为钢丝绳拉升式自动猫道结构设计与优化提供指导.

Dynamics model and analysis of the lifting system of automatic catwalk

When the field test of rope pulled automatic catwalk was carried out,the load fluctua-tion of rope was obvious,and it was difficult to complete the lifting of the target weight column. Therefore,the structure and motion characteristics of rope pulled automatic catwalk were ana-lyzed,and dynamic model based on the D’Alemebert principle was established,MATLAB soft-ware was used to analyze the influence of the distance between the block on the base and the bot-tom of the ramp,the hinge position of the transfer arm and the support arm,and the length of the support arm on the load of rope.The analysis results showed that adj usting the position of block on the base to the bottom of the ramp,and reducing the length of support arm could reduce the required force of rope in the process of lifting.According to the analysis results,the structure size of automatic catwalk was adj usted to carry out the field test,the test result showed that the maximum lifting oil pressure of the hydraulic which was decreased by more than 2 MPa,the lift-ing capacity of automatic catwalk was improved.The analysis and experimental results can guide the design and optimization of rope pulled automatic catwalk.