回转起重机

Lifts organization, the amplitude organization, the rotation organization and walks all to have respective motor or the hydraulic cylinder. The arm uses the box shape expansion and contraction structure. In order to increase the stability of the hoist crane when lifts heavy objects and not to pour out, leg are installed on the hoist crane.

起升机构、变幅机构、回转机构和行走机构都有各自的液压马达或液压缸，吊臂采用箱形伸缩臂式结构，为了增大起重机在起重作业时的稳定性和不倾翻，在起重机上安装了支腿。

Key Words: Tower crane is a kind of hoisting machinery whose tower body stands up and gibbet revolves.

塔式起重机是一种塔身竖立而起重臂回转的起重机械，。

Realize the installing of standard section by operate the hand crane.

通过操纵手摇起重机使吊具升降和吊杆的回转运动实现标准节的安装就位。

The hook and rope of a crane can be regarded as a pendulum that is drived by slewing motion and derricking motion.

起重机这类起重运输设备的吊钩缆绳可以看作受回转、变幅运动驱动的单摆，但起吊运动也在水平方向上产生科里奥利力，影响载荷摆动的规律。

It is used for the crane slewing bearing.

这是用于起重机的回转支承。

The QTZ series tower type derrick that my factory produce is the new tower machine that ushers in the latest technique in the construction minister sand building machine institute for research to develop, having a following characteristics: Adopt the small car changes, turning last time from the rise type structure.

帮忙翻译一篇文章，翻译成英语！我厂生产的QTZ系列塔式起重机是引进建设部长沙建筑机械研究院最新技术研制的新型塔机，具有以下特点：采用小车变幅，上回转自升式结构。

This vehicle adopts Yiqi Jiefang CA5275JQZ special purpose chassis which has full-view driver's cab, high pressure electric spray engine ,Euro Ⅲ emission standards, fits the requirement of the national environment protect announcement the maximum lifting capacity is 20t, the minimum working range is 3.1m, the maximum height of main boom is 31.8m, the maximum lifting height of main and jib boom comes up to 39.2m, the length of all-extended boom is 31.4m,the turning radius is 3.62m and it can 3600rotate continuously .

最大起吊重量为20吨，最小作业幅度3.1米，主臂最大起升高度31.8 米，主臂加副臂最大起升高度达到39.2米，全伸臂长31.4米，回转半径3.62米，360度连续回转。2、采用一汽解放CA5275JQZ全景驾驶室汽车起重机专用底盘，高压共轨电喷发动机，欧Ⅲ排放标准，符合国家环保公告要求。

It obtains the dynamic response results including simulation nephograms of dynamics stress and displacement and curve of dynamic stress of representative nodes.lt analyzes the influences of the braking time to the structure and gains the general methods and steps in solving this kind of problem.

5利用ANSYS8.1对起重机回转制动进行瞬态动力学分析，从而获得臂架系统在该工况时的瞬态动力响应，包括动应力、动位移响应仿真云图和典型节

The controller controls the velocity of swing motor by the means of meter-in to track the output velocity of rotary stage of the optimal regulator, so that the load sway can be controlled during swing operation.

最后，本文设计了回转液压回路模糊控制器，以换向阀节流调速的方式对液压马达转速进行模糊控制，使起重机回转平台跟踪最优调节器输出的转速，实现对吊重摆振的控制。

Not only the overall scheme for the frame of this system is determined, but also the scheme for transmission of luffing motion and rotating motion is done. In addition, the design and calculations are done for driving, transmitting, hoisting, balancing jib, tower cap and dolly of luffing motion.

本文确定回转塔式起重机试验台的总体结构方案，确定变幅运动和回转运动的传动方案，设计和计算变幅运动的驱动部分，传动部分，起重臂，平衡臂，塔冒和小车。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。