水轮机

The running tests of the alloy coatings on the blade of hydraulic turbine produced using oxy - acetylene spray welding procedure manifested that the average service life of many different hydraulic turbine obtained a lot improvement after spray welding.

应用氧乙炔喷焊工艺在水轮机叶片上制备合金涂层，经过数台机组多年的实际运行，表明该材料抗磨蚀性能优异，喷焊后的水轮机叶片的平均使用寿命得到大幅度提高。

Studies on the Technology of Path Planning in Automatic Grinding and Polishing Die and Mould with Free-form Surfaces;2. The grinding machine controller controlled by computer directly for the repairing hydraulic turˉbine guide vane was designed.

针对水轮机活动导叶的修复问题，设计了微机直接控制的水轮机活动导叶打磨用机械手控制器，它可控制五个自由度，方便地修复各种形状复杂的活动导叶。

This paper describes and compares 4 streamtube models (single-disk single-streamtube, double-disk single-streamtube, single-disk multi-streamtube and double-disk multi-streamtube models) based on the momentum theory for the hydrodynamic performance prediction of the vertical-axis variable-pitch turbine that may be employed to tap tidal stream energy resources, especially for the prediction of the overall turbine power coefficient.

以潮流发电水轮机的设计为研究背景，分析和总结了基于动量定理方法的四种流管模型(单盘面-单流管模型、双盘面-单流管模型、单盘面-多流管模型和双盘面-多流管模型)在竖轴变攻角水轮机的水动力性能计算中的应用，特别是能量利用率预报方面的应用。

It is also possible to predict both the frequency and amplitude of pressure fluctuation at the inlet and outlet of all parts of turbine, as well as the phenomenon of rolling vortex in the draft tube.

从而得出水轮机各部件内的瞬时流态和随时间的变化过程，预测了水轮机各部件内压力脉动的频率和幅值，并显示尾水管内的旋转涡带现象。

Based on the simulation results, the region and the degree of cavitation occurred in the flow passage of the turbine with a low water level at the outlet of the draft tube are examined, the cavitation performance of the turbine is also evaluated.

根据模拟结果，考察了水轮机在低尾水位下运行时流道内空化发生的部位和程度，并对水轮机的空化性能进行了预估。

This paper is made up of 6 sections. In chapter 1, the domestic and overseas development of hydro-turbine governor and the general situation of microprocessor-based governor are introduced. The characteristics of programmable logic controller and the advantages of application in hydro-turbine governor system are described later.

本文总共分为六个部分：第一章介绍了水轮机调速器技术国内外的发展以及微机调速器的发展概况，并阐述了可编程控制器的特点以及将其应用于水轮机调速系统的优势。

The distuibution of axial plane stubs and stub crossing points are non-uniform and quantity of them is not equal when the blade is made by using traditional design method of turbine. These are not benefit with calculating wood model and drawing. In this paper, to make blade wooden patterns is using blade mean camberline. This makes the wooden patterns meet the demand of the design and meet the shape of the runner blade. And this can agree with requirements of hydro and mechanical analysis and making the model of blade by using the numerical control machine. It has reference value to whole design of turbine.

针对传统方法设计水轮机叶片时，获得的轴面截线和截线交点疏密不均、个数不等、不利于叶片木模的计算和绘形的缺点，文中利用叶片叶型骨线数值生成叶片木模图，使新的木模图能够更好的体现设计要求和符合实际转轮叶片的形状，并能满足进一步的水力和机械分析以及数控机床制作模型叶片的需要，对水轮机的整体设计具有参考价值。

The water-air two-phase flow model is applied to numerically study the effect of air admission through center hole of turbine shaft on the vortex band in draft tube and the flow regime.

基于水气两相流模型，研究了水轮机主轴中心孔补气对尾水管涡带的影响以及对于改善水轮机内部流态的作用。

Presented in this paper is a mathematical model for optimal construction design of the thrust bearing support in a large hydraulic turbine.

本文通过对大型水轮机推力轴承支架结构特点的分析，提出了大型水轮机推力轴承支架结构优化设计的数学模型。

An assessment of hydropower potential and environmental impact is vital to a decision whether it is feasible and valuable to reinstall a waterwheel, a turbine or an Archimedian screw for Gordleton Mill on the Avon Water, New Forest District, England.

摘 要：水能和环境影响的评估，对于判别英格兰新福里斯特区埃文河Gordleton磨坊重新安装一台改良水车或一台水轮机或一台阿基米德式螺旋水轮机的可行性和经济性是至关重要的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。