起重机小车轮压经轨道传给箱形主梁上盖板和腹板，使之产生局部应力。
The local stress in the box beam is caused by the wheel pressure of the trolley conveyed along the track onto the upper flange and the web of the beam.
本课题主要对起重机小车的运行机构进行了总体设计，介绍了小车的基本构造及传动方案。
This paper focuses on design of running mechanism of the dolly, introducing basic constitution of dolly and driving project.
这些缺陷反过来又影响起重机或小车的正常运行。
These defects in turn affect the normal operation of cranes or cars.
安装前要对起重机安装跨度，金属结构主梁的拱度、水平旁弯，小车轨道高低差、轨距偏差，桥架对角线等进行测量。
To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
轨道是起重机或小车平稳运行的基础，一般要求每年检查2 ~4次。
Track is the foundation of crane or car running smoothly, generally requires checking 2 ~ 4 times every year.
本文用简化的力学模型对龙门起重机和装卸桥小车撞击缓冲器时的动力响应进行理论分析。
Resorting to a simplified mechanical model, this paper makes a theoretical analysis of the dynamic response of the gantry crane and loading bridge when their their trolleys collide with buffers.
随着起重机大车、小车及起升机构的加速和减速，由钢丝绳连接的吊重的运动状态表现为一个复杂的空间运动。
The spreader is linked to the crane through the rope, and its motion state is changed complicated in three-dimension with the accelerating and decelerating of trolley, hoist and gantry.
分析了起重机大、小车运行产生啃轨的原因及其危害，同时列出啃轨时检验注意的问题，提出了解决啃轨的方法。
At first, the reason and hazard of rail gnawing in cranes big and small vehicle are analyzed, then the problems are listed when checking rail gnawing and resolutions are put forward.
介绍了一起因限位失效导致的起重机事故，深入分析了大小车极限位置限制器的失效原因，并从多方面提出了预防措施。
A crane accident caused by invalid position limit is introduced. The causes for invalid position limiters are analyzed, and the preventive measures are proposed.
普通桥式起重机一般由起重小车、架桥运行机构、桥架金属结构组成。
General bridge crane lifting trolley generally, Bridges run organization, structure and composition of metal bridge.
某150t冶金起重机投产运行10多年后，主小车架马鞍形端梁局部产生了一些肉眼可见的裂纹。
The saddle-shaped end beams of the trolley structure of a 150 t metallurgical crane, which had been in use for 10 years, came to have a lot of visible cracks.
双小车桥式起重机是桥式起重机的一种。
PLC系统采用SIEMENS公司产品，能控制起重机大车、小车的运行方向和速度换档；
PLC system adopts the SIEMENS Company products, can control the crane cart , car operation direction and change speed ;
摘要：一种轨道式龙门起重机由于多年运行，其小车轮频繁出现走偏现象。
Abstract: the trolley wheel of some kind of gantry crane appeared the phenomenon of slanting. After several years' usage.
目前，电缆滑车广泛应用于各种通用桥(门)式起重机、电动葫芦自行小车、仓库、船厂、码头等起重设备的移动供电。
At present, the cable pulley is widely used in all kinds of general bridge (the door) mobile power supply cranes, electric hoist car, warehouse, shipyard, dock hoisting equipment.
目前，电缆滑车广泛应用于各种通用桥(门)式起重机、电动葫芦自行小车、仓库、船厂、码头等起重设备的移动供电。
At present, the cable pulley is widely used in all kinds of general bridge (the door) mobile power supply cranes, electric hoist car, warehouse, shipyard, dock hoisting equipment.
应用推荐