Generally the value of vacuum in draft tube is composed of three parts namely dynamic vacuum static vacuum and negative water hammer pressure .

尾 水管真空度一般由动力真空、静力真空以及 尾 水管 进口负水击压力三 部分叠加而成。

First it introduces the basic structure and working principle it is composed of a motor a buoy adjusting bracket a hollow shaft the bearing sleeve dome propeller and a guiding tube is composed of eight parts .

首先介绍了它的基本结构和工作原理，它是由电动机、浮筒体、调整支架、空心轴、支承套筒、导流罩、螺旋桨和导流 管八 部分组成。

Analysis on Leakage of Boiler Tube and Pressure Parts of DG 670 t / h Boiler

DG670t/h锅炉四 管及承压 部件泄漏分析

The paper discusses the points and details process of the Drawing Technology in Tube - Shaped parts and try to CAD System of the drawing die .

论述了 筒形 件拉深工序设计中的关键问题和详尽的处理流程，并对 筒 形 件拉深模CAD系统开发进行了尝试。

The stress and strain distribution of the deep-drawing forming process of the magnesium alloy tube parts in different stage and different region was analyzed .

分析了 筒 形 件在拉深成形的不同阶段不同区域的应力应变分布。

Following sequences were done by SCK in order to keep shop fabricated steel tube trusses and other parts meet with the requirement of design and site assembly .

为使厂内制作的 钢管桁架各 构件满足设计要求，保证现场顺利拼接，借助计算机模型进行 钢管桁架空间圆弧的放样和大 直径 钢管的火焰加工、厂内预组装；

3D FEM Simulation Analysis of Piling And Spining Force of Forward Flow Forming for Tube Parts

筒形 件正旋隆起及旋压力三维有限元模拟分析

The machining technology of forging tube makes the forging parts mass light intension high cost little and machining exactness . So it is the important aspect in 21 century in the forging and machining fields .

由于容易满足 成形 产品轻量化、强韧化和低耗高效、精确度高等方面的要求， 管材 塑性加工已成为先进塑性加工技术面向21世纪研究与发展的一个重要方向。

A few kinds of FEA model about heat exchanger structure stress analysis were discussed and the model to solve this thesis 's problem was put forward : tube was simulated by truss element and other parts of structure were simulated by solid element .

讨论了几种换热器结构有限元分析模型的特点，提出了针对本文问题的有限元模型：用杆单元模拟换热 管，其它 部分用实体单元来模拟。

The spline tube differs greatly from the spline shaft parts in the cold roll forming process which has a complex process with large blank deforming quantity .

花键 管冷滚轧精密成形过程不同于花键轴类 零件，其坯料金属变形量大，成形过程较为复杂。

Simulation and optimization of the upset forging process of tube parts

管 坯镦锻工艺仿真及优化

Axle tube flange parts itself complex geometric shape high dimensional accuracy of the part it led to the parts in plastic forming process complex process cumbersome inefficient forming .

对于半轴 套管法兰 零件，由于本身几何形状复杂，零件的尺寸精密度很高，故导致了该零件塑性成形过程复杂，工序繁琐，成形效率很低。

Every branch tube part is configured by the method that the branch tube parts are inserted between the processing bodies with mutually different height positions .

各 支管 部以插在高度位置彼此不同的被处理体之间的方式进行配置；

New technology of power spinning for tube parts & floating mandrel spinning

筒 形 件强力旋压新技术&浮动芯模法

Multi ways tube on air conditioning header is the main parts of condenser .

空调联箱多 支管是空调冷凝器的主要 零部件之一。

The motorcycle rear fork belongs to the suspension device of motorcycle which mainly consists of left and right rear fork side tubes axle tubes connector tube stiffener plates installing linings and other parts .

摩托车平叉属于摩托车的悬挂装置，主要由左、右平叉侧管、平叉轴管、连接 管、加强板和安装衬片等 零部件 组成。

The said damping tube is one of the force-applied parts of front telescope type absorber .

摩托车减震器前叉减振 柱是套筒式前减震器的主要受力 件之一。

The pulse tube refrigerator contains no moving parts at its cold head and has considerable system advantages over most other types of cryogenic refrigerators in terms of reliability lifetime vibration and cost .

由于它在低温下没有运动 部件，较其它类型的 制冷机具有振动小、可靠性高、寿命长、造价低等优越性。

Installed the high speed spinning tube and other machine parts the framework junction parts is designed not only strength enough but also higher accuracy in dimensional and plane .

该框架结构件上装有高速运转 纱筒和其他 机件，设计要求框架不但有足够的强度而且有较高的尺寸精度和平面度。

The stern tube instrument pivotal parts of ships can not follow the traditional structure type and the routine static design technique any more . It has become the hotspot of the shipping industry in the world .

作为船舶关键 部件的尾 管装置已不能继续沿用传统的结构型式和常规的静态设计方法，这日益成为世界航运界关注的热点。

The patterns of influence of tube type insert parts and air velocity on air heat transfer coefficient air pressure loss mean temperature of tube surface and air preheated temperature were also analysed respectively .

具体分析了 管形、插入 件及空气流速对空气侧给热系数、阻力损失、管壁温度和空气预热温度的影响。

Single-motor construction simp e screw tube design few operating parts .

单电机，螺纹 管设计结构简洁，传动 件少。

By ensuring the temperature of molten steel fore quick change and after improving the baking quality of tundish and submerged tube and adopting attaching parts to connect the joins No. 3 Steel-making Plant of Jigang has realized the tundish quick-change which time is 2 ~ 3min .

济钢第三炼钢厂通过确保快换前后的钢水温度、提高中间包及浸入式 水口的烘烤质量以及采用连接 件连接接头等措施，实现了中间包快换，快换时间为2～3min。

Study on Cold Press Forming Progress of the Thick Wall Long Tube Parts

厚壁长 筒 形 零件冷挤压成形工艺的研究

If this is not done some parts of the tube will be stretched more than other parts and this puts a strain on the tube that might cause it to Blow out .

如果不这样做， 内胎的某一部分就比其它 部分膨胀的更多，这一部分内胎可能就会因拉的过紧而引起爆裂。

Algorithm Design of the Deep Pulling Technology of Tube Shaped Parts

圆筒形拉深 件拉深工艺的算法设计

The new technology is especially fit for working big diameter and high precision tube parts .

这对于加工大直径、高精度的 管 类 件具有重要的意义。