Study On Automation Reform Engineering Of Portal Crane

Portal crane,as a flexible and versatile lifting equipment,is one of the most important loading and unloading machinery in bulk port.Portal crane automation is the key factor of port automation and intellectualization.At present,portal crane operation automation is low and relies heavily on manual work.Compared with the requirements of efficiency,safety and environmental protection of intelligent ports,there is a big gap.Therefore,it is imperative to carry out the automation transformation of portal crane.Because of the complex structure and trajectory of portal crane,this paper will gradually study the automation transformation of portal crane from several aspects.The main operation mechanism of portal crane is composed of complex boom system and wire rope.The stability of operation is an important link in the automation transformation of portal crane.Firstly,based on the CAD drawings,the main operating mechanism of portal crane is modeled in 3D by SolidWorks software,and the assembled model is imported into ADAMS software for dynamic analysis.The joint simulation is carried out by ADAMS and Simulink.According to the operation characteristics of portal crane,various mathematical models for anti-sway control of portal crane are established and analyzed one by one.Finally,the anti-sway model suitable for portal crane is screened out.Then,aiming at improving the operation stability and accuracy of portal crane automation,this paper studies the frequency conversion control of portal crane,analyses the structure and principle of frequency conversion control,focuses on the analysis of the working principle and implementation method of vector control,and compares the characteristics of traditional V/F frequency conversion control and vector frequency conversion control,and obtains the vector frequency conversion control.It is more suitable for portal crane,where the torque changes frequently,the performance of low speed is required well and the control accuracy is required high.This paper introduces the transformation of the frequency converter of portal crane.The control performance and dynamic response speed of the frequency converter system are tested by using the frequency converter monitoring software.The advantages of the vector frequency converter system in stable control performance and fast dynamic response are verified by testing.And the energy-saving effect of the reformed frequency conversion system is analyzed.Finally,the construction content,control points and influencing factors of portal crane automation renovation project are analyzed,the scheme and implementation process of automatic control are designed,the key components of automatic control are introduced emphatically,and then the hardware and software parts of portal crane semi-automation renovation project under way in port are analyzed.It is a very meaningful attempt to study the semi-automation of portal crane’s luffing,rotating and lifting mechanism,which is the premise of the overall automation of portal crane,and provides experience and foundation for future multi-machine automation operation.