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Optimization of the control on the falling reference of the grab bucket of ore ship unloader;

矿石卸船机抓斗下沉量控制优化

According to the actual working conditions of bolting-shotcrete supporting in coal-mine tunnel,the working mechanism of different buckets was studied,their merits and demerits were analysed,and the double-crank grab bucket with assistant linkage was proved to be an ideal choice of grabbing materials in coal-mine tunnel because its motion trace was definite and symmetric and occupied lesser space.

从巷道锚喷支护中物料抓取的实际作业环境出发,对拟采用的几种抓斗的工作机理进行了分析研究,比较了各方案的优缺点,指出辅助连杆的双曲柄抓斗的运动轨迹确定、对称,且具有在竖直方向上占用空间最小的特点,是井下巷道施工中物料抓取的理想选择,这种设计方法能够为相关抓取装置的设计起到参考作用。

This paper analyses in quantity for the key factors to influence the fold and unfold of the grab bucket in the four-drum grab bridge ship unloader.

对四卷筒抓斗卸船机抓斗开闭的影响因素进行定量分析,根据悬索理论,给出了悬垂段钢丝绳的悬垂方程。

Several problems in designing long stay bar double jaw boards grab;

长撑杆双颚板抓斗设计中的几个问题

Numerical analysis of the disabled grab and some improvements in structure;

抓斗失效的数值分析及结构改进

Simulation and analysis of grab lifting dynamic load coefficient;

抓斗起升动载系数的仿真分析

The clamshell excavates the deep and shallow wall troughs because it has the characteristics of high working efficient, easy to move and .

深、浅墙均采用抓斗挖槽， 因其具有工效高、移动方便、施工无震动等特点。

In the construction of foundation seepage control wall for construction cofferdam of Wangpuzhou Water Control Project in the Hanjiang River,the clamshell was used to dig the trench.

在汉江王甫洲水利枢纽施工围堰基础防渗工程中，采用抓斗挖掘槽孔，成功地建造了３道固化灰浆防渗墙，总截水面积达１５１７８。

When a clamshell dredger is used to carry out over-depth and over-width dredging,accuracy control is always one of the difficulties.

抓斗式挖泥船进行超深超宽施工时,精度控制始终是难题之一。

Applications of 616G5frequency con version adjustment and programmabl e control technology in clamshell crane are introduced.

介绍了安川616G5变频调速技术和可编程控制技术在抓斗吊上的应用。