桥式起重机电气控制毕业设计

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1、 275T/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。

2、电动机通过减速器，带动卷筒转动，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 275T/50 bridge crane electrical control design ABSTRACT Bridge 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

3、 the track on both sides 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 grou

4、nd equipment.Bridge crane 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, d

5、rum and pulley blocks。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 th

6、e reel down to take-off 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. KeywordsKeywords: lifting trolley; motor; governor resistor string 目录 1 绪论 1 1.1 选题的提出和意义 1 1.2 桥式起重机的发展趋势 . 2 1.2.1 国外起重机的发展状况 . 2 1.2.2 国内起重机情况 . 5 2 起重机控制系统方案选择 .8 3 电机容量选择及调速电阻器计算 11 3.1 电机容量选择 11 3.1.1 主提升机构电机容量选择 11 3.1.2 副提升机构电机容量选择 11 3.1.3 大车行走机构电机容量选择 . 12 3.1.4 小车行走