检索结果-南通市图书馆

Experimental investigation of particle-induced pressure loss in solid–liquid lifting pipe

Journal of Central South University 2017年第9期24卷 2114-2120页

作者：宋跃文朱小军孙志强唐达生 School of Energy Science and Engineering Central South University State Key Laboratory of the Exploration and Utilization of Deep-sea Mineral Resources(Changsha Research Institute of Mining and Metallurgy Co.Ltd.)

In order to investigate the characteristics of particle-induced pressure loss in the solid–liquid lifting pipe,a series of experiments were conducted in 200 mm diameter lifting *** manganese nodules with five different mean diameters of10 mm,20 mm,30 mm,40 mm and 50 mm were used,both in isolation and a combination in equal fraction by *** flow velocities in the lifting pipe ranged from 0.12 m/s to 1.61 m/s,and the mass of particles employed was 10 kg for each particle *** regimes,wavy bed,partly fluidization,and fully fluidization,were observed over the flow *** solid–liquid pressure drop data were measured by differential pressure transmitter,and pressure drop caused by the solid particles was calculated and *** results show that the evolutions of the pressure loss due to solid particles are relevant to the solid–liquid flow regimes,and they are distinctly influenced by fluid velocity and particle size.

关键词： lifting pipe pressure loss simulation manganese nodules flow regimes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Design and Strength Analysis of A Spherical Connector for lifting Subsystem in Deep Sea Mining System

引用

China Ocean Engineering 2006年第4期20卷 605-613页

作者：冯雅丽张文明冯福璋 School of Civil and Environmental Engineering University of Science and Technology Beijing

A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand.

关键词： pipe joint lifting pipe contact stress spherical joint buttress thread deep sea mining

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

深海采矿系统纵横摇补偿装置的方案及主要参数研究

深海采矿系统纵横摇补偿装置的方案及主要参数研究

引用

作者：刘治波中南大学

学位级别：硕士

The compensation device of pitching and rolling movement is an important part of the deep-sea mining system. At the top, the lifting pipe is hung in the heaving platform of the mining ship, and at the bottom, it is connected with the mining machine via the buffer and the soft pipe. Under the influence of the pitching, rolling, towing movement of the mining ship and the walking of mining machine, the lifting pipe would not stand vertically;with its bottom has much departure. In order to avoid the lifting pipe from bearing great bending stress and strain which would cause damage, moreover, to make the mining system work safely, it is necessary to design a reasonable connection device which could pitch and roll with the lifting pipe. Based on the above aims, this thesis has done some researches on the compensation device of pitching and rolling movement.The main works are as follows:1、According to the work purpose of the compensation device of pitching and rolling movement, the whole design scheme of the connecting device is presented. The structure of the inner and outer frame and the connection scheme of the inner and outer frame were determined.2、Based on the intensity condition, the main structure of the compensation device of pitching and rolling movement, such as the inner and outer frame, the pitching axis and rolling axis, have been designed and calculated.3、Considering the outer frame and rolling axis, the inner frame and pitching axis as subassembly respectively, the finite element model of them have been established, then their mode analysis have been done. Some lower natural frequencies and corresponding mode shapes have been calculated, the results have been analyzed.4、The static structural analysis of the outer frame subassembly and inner frame subassembly have been finished with finite element method. The stress and displacement nephograms of the model in the worst condition have obtained, the results have been analyzed.

关键词： deep-sea mining system compensation device of pitching and rolling movement lifting pipe finite element method

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：