港口门座起重机是港口装卸作业的主要起重设备。
The portal crane is the main hoisting equipment for loading and unloading in the port.
本系统已用于三个不同吨位小型门座起重机的设计。
The system has been used in the design of three light duty portal cranes with different lifting capacity.
四连杆组合臂架是门座起重机最常用的变幅机构形式之一。
The four-bar combination jib is one of the most commonly used forms of the derricking mechanism for portal cranes.
门座起重机是我国研制最早、具有重要代表性的一种旋转式有轨起重机。
The partially slewing crane is a kind of representative rotary rail crane, which is also the first developed type in our country.
本文论述了门座起重机小拉杆的损坏是由于在起重机变幅过程中，小拉杆承受较大的附加应力所致。
This paper discussed the wreck of the small pole of portal crane is because the small pole supported greater add working stress in range - changing process.
港口门座起重机是港口生产作业的主要装卸设备，其运行技术状态的好坏直接影响着港口的生产效率和经济效益。
Portal Cranes are the main handling facilities of the port production and the technological state of their performance affect the production efficiency and economic benefits of the port directly.
门座式起重机的工作机构振动历程有特殊性。
The vibration course of the working mechanism of the portal crane has its particularity.
单臂架门座式起重机结构简单、起重量大自重轻。
Simple arm frame gantry crane structure, lifting large light weight.
对国内一种新兴的建筑机械——擦窗机进行基本介绍，并对比擦窗机和门座式起重机，阐述两者设计的异同点。
The article introduce a new construction machine gondola, and makes a comparison between the gondola and the gantry.
最后作为复杂机械产品的应用实例，建立了港口门座式起重机的CAD系统模型。
As an example, we build the model of the portal crane CAD system to verify the above techniques and criterions.
文章详细介绍了超大型高架门座式起重机液压同步预升设备的工作原理和液压系统组成，并对液压系统进行了较全面的分析。
The paper introduces in detail the working principle and make-up of the hydraulic synchronisation lifting device for lifting a high portal crane and gives an overall analysis of its hydraulic system.
随着变频器的日益普及，其在港口设备上得到了广泛的应用，门座式起重机也普遍采用了变频控制技术。
Along with popularizing of inverter increasingly, inverter is widely used in many harbour facilities such as portal crane.
四连杆门座式起重机采用最佳优化的组合臂架系统，具有水平落差小、变幅平稳、功耗低的特点。
Four-link portal crane using the best combination of optimized boom system, with horizontal small gap, amplitude stable, low power consumption.
门座式起重机分单臂架和四连杆两种类型，起重机的起升、变幅、回转和行走四大机构均采用交流变频调速，整机采用PLC控制，使用性能优越。
Portal crane sub frame and four-link arm two types, from the crane hoisting, luffing, slewing and walking four agencies ac frequency control, the machine USES PLC control, superior performance.
门座式起重机分单臂架和四连杆两种类型，起重机的起升、变幅、回转和行走四大机构均采用交流变频调速，整机采用PLC控制，使用性能优越。
Portal crane sub frame and four-link arm two types, from the crane hoisting, luffing, slewing and walking four agencies ac frequency control, the machine USES PLC control, superior performance.
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