10T50桥式起重机电气控制设计论文.doc
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1、10T/50桥式起重机电气控制设计摘 要桥式起重机是桥架在高架轨道上运行的一种桥架型起重机,又称天车。桥式起重机的桥架沿铺设在两侧高架上的轨道纵向运行,起重小车沿铺设在桥架上的轨道横向运行,构成一矩形的工作范围,就可以充分利用桥架下面的空间吊运物料,不受地面设备的阻碍。 桥式起重机广泛地应用在室内外仓库、厂房、码头和露天贮料场等处。桥式起重机可分为普通桥式起重机、简易粱桥式起重机和冶金专用桥式起重机三种。 普通桥式起重机一般由起重小车、桥架运行机构、桥架金属结构组成。起重小车又由起升机构、小车运行机构和小车架三部分组成。起升机构包括电动机、制动器、减速器、卷筒和滑轮组。电动机通过减速器,带动卷
2、筒转动,使钢丝绳绕上卷筒或从卷筒放下,以升降重物。本文重点研究起重机的控制,通过使用串电阻的调速方法已实现对电机的控制,从而控制起重机。关键词:起重小车;电动机;串电阻调速10T/50 bridge crane electrical control designABSTRACTBridge crane is a bridge in an elevated running track as a bridge-type crane, also known as Crane。Bridge crane installed in the bridge along the track on both si
3、des of the elevated vertical run,Lifting trolley along the bridge on the laying of the track in the horizontal run, which constitute the scope of work of a rectangle, you can take full advantage of the space bridge was being lifted the following materials, the hindered from ground equipment.Bridge c
4、rane widely used in indoor and outdoor warehouses, factories, docks and outdoor storage yard, etc. Bridge crane bridge crane can be divided into ordinary, simple beam bridge crane and metallurgical three special bridge crane.Lifting bodies, including the motor, brake, reducer, drum and pulley blocks
5、。Car lifting and lifting by the agencies, institutions and small car running frame is composed of three parts.Lifting bodies, including the motor, brake, reducer, drum and pulley blocks. Motor through reducer, driven rotating drum so that the wire rope around the drum or from the reel down to take-o
6、ff and landing weights. This article focuses on the cranes control, through the use of series resistance to achieve the speed control method of motor control to control a crane.Keywords: lifting trolley; motor; governor resistor string目录1绪论11.1 选题的提出和意义11.2桥式起重机的发展趋势21.2.1国外起重机的发展状况21.2.2国内起重机情况52起重
7、机控制系统方案选择83电机容量选择及调速电阻器计算113.1电机容量选择113.1.1主提升机构电机容量选择113.1.2大车行走机构电机容量选择113.1.3 小车行走机构电机容量选择123.2调速电阻器计算143.2.1主起升机构调速电阻计算143.2.2大车行走机构调速电阻器计算153.2.3小车行走机构调速电阻器计算174主起升机构控制系统194.1控制系统组成194.2主起升机构控制电路图194.3主起升机构的工作原理204.4系统的保护225 大车运行机构控制系统设计245.1控制系统组成245.2大车机构控制电路图245.3大车机构的工作原理:256小车运行机构控制系统设计276
8、.1控制系统组成276.2小车机构控制电路图276.3大车机构的工作原理286.4晶闸管无触点开关的工作原理296.5晶体管无触点的应用29结论31致 谢32参考文献331绪论1.1 选题的提出和意义由于工业生产规模不断扩大,生产效率日益提高,以及产品生产过程中物料装卸搬运费用所占比例逐渐增加,促使大型或高速起重机的需求量不断增长,起重量越来越大,工作速度越来越高,并对能耗和可靠性提出更高的要求。起重机已成为自动化生产流程中的重要环节。起重机不但要容易操作,容易维护,而且安全性要好,可靠性要高,要求具有优异的耐久性、无故障性、维修性和使用经济性,起重机的出现大大提高了人们的劳动效率,以前需要许
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