10吨位桥式起重机总体设计摘 要
经过十几年的发展，我国工业化进程不断推进，起重行业的需求进一步增大。桥式起重机是桥架型起重机中最主要的型式,它具有场地利用率高、作业范围大、适应面广、通用性强等特点。桥式起重机一般由桥架，起升机构和小车运行机构，大车运行机构，操纵室，小车导电装置，起重机总电源导电装置等组成。本设计采用10吨位电动双梁桥式起重机进行研究。
全文分五部分内容来完成本次设计课题内容：
第一部分为绪论部分，简要介绍了起重机械的作用、国内外起重机械的发展状况及存在的问题、我国起重机械的发展方向。第二部分为总体结构布置的确定，该部分主要分析了起重机的工作特点，主要参数及组成部分包括起升机构、大小车机构的布置方案，轮压的计算。第三部分为桥架结构的设计，该部分包括桥式起重机主要尺寸如大车轮距、主梁高度、端梁高度、加劲板的布置尺寸等和计算载荷，箱型结构主梁，主要焊缝的验算。四部分为电气部分的设计，该部分介绍了变频调速的基本原理及发展现状，桥式起重机的频调速，起升机构的变频调速，大小车的变频调速及整体PLC设计。第五部分为结论及展望部分，对本设计进行分析总结，论证桥式起重机基本尺寸和电气部分的可靠性，同时也指出其不足待改进之处。
关键词：桥式起重机；起升机构；桥架结构；PLC
Abstract
After more than ten years of development, the industrialization of China has continuously promoted, and the crane industry demands further increase.Overhead travelling crane is the main type of overhead type crane and ithasthefollowingadvantages:highfieldutilization rate,greaterscopeofwork,widerangeadaption,gooduniversalityandsoon.Ingeneral,overheadtravellingcraneiscomposedofsranespanstructure,hoistingmechanism ,wheelingmechanism,travelling mechanism of the larger traveller ,control carbin,the car conductive device,the general supply conductive device of srane etc.This design uses the electric double girder overhead travelling crane research.The full text is divided into 5 parts to complete this design topic content:The first part is the preface.In this part,the effect of crane, the development of the situation and existing problems of lifting equipment at home and abroad,the development direction of China will be introduced.The second part is the determination of the overall layout of the structure.This part mainly analyzes the work characteristics and technical parameters of the crane.The constiturnt part of layout scheme include hoisting mechanism , wheeling mechanism,travelling mechanism of the larger traveller and calculation of wheel pressure will also be mentioned.This part include the third part is the design of the bridge structure.It includes the main dimensions of overhead travelling crane such as the wheelbase of cart,height of main beam,end beam heigt,layout size of the stiffened plate and so on. We willconsiderthecheckingofcalculating load,box structure beam and main weid.The fourth part is the design of electricalpart.The fundamentalanddevelopmentstatusoffrequencycontrolwillbetalkedabout.Overheadtravelling crane，hoistingmechanism，cart and trolley all need consider frequency control.There is a design ofglobal PLC. In the last part ,according to the conclusion,the paper has made analysis and summary to this design,giving the basic size and electrical part of Overhead travelling crane to be proved,pointing to the deficiencies and needing improvements of the argument.
Key words: Overhead travelling crane; ,hoisting mechanism; bridge structure; PLC ...
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