水轮机

On the basis of comparison of the Bernoulli equation and operating parameteres for clean water flow with those for silt-laden water flow,different features of energy transformat...

指出了在相同静水头下含沙水流时水轮机的工作水头小于单相液体的工作水头以及水轮机输出功率、效率等参数的变化规律和含沙量的关系。

Therefore how to select the minimum character sets in guaranteeing the incurrence of system status approval is important, namely to reduce the character, lower work loading and reduce the uncertain factors in the conditions of guaranteeing diagnostics accuracy. And in fact these are the properly research contents of rough sets.

因此，论文介绍了粗糙集的基本理论，阐明了基于粗糙集观点的知识表达方法，根据水轮机调速系统故障特征的复杂性和不确定性以及粗糙集决策表白动约简、搜索的基本方法，提出了利用粗糙集决策表约简规则进行水轮机调速系统故障诊断决策方法及具体步骤。

Therefore how to select theminimum character sets in guaranteeing the incurrence of system status approval isimportant, namely to reduce the character, lower work loading and reduce the uncertainfactors in the conditions of guaranteeing diagnostics accuracy. And in fact these are theproperly research contents of rough sets.

因此，论文介绍了粗糙集的基本理论，阐明了基于粗糙集观点的知识表达方法，根据水轮机调速系统故障特征的复杂性和不确定性以及粗糙集决策表白动约简、搜索的基本方法，提出了利用粗糙集决策表约简规则进行水轮机调速系统故障诊断决策方法及具体步骤。

How to measure and analyze the phenomena in property of pump and hydroturbine is one of the most important field in cavitation and erosion research.

影响水泵与水轮机使用寿命与性能的主要问题是空化空蚀现象，在现场监测与分析水泵与水轮机的空化状态是空化空蚀研究的重要领域。

And mainly introduced the neural-network theory. The neural-network basded intelligent control for hydroturbine governor is studied.

并将神经网络理论引入水轮机调速器的研究探索之中，对基于神经网络的水轮机调速器进行了初步研究，仿真表明其效果较好。

Hydroturbine governor is one of the important controlling devices in the hydro power plant, and its performance exerts important influence on the quality of electric energy and the operational reliablity of the hydro power plant.lt is an active subject to research some technology and selection for hydroturbine governor.

水轮机调速器是水电厂的重要控制设备，其性能的好坏直接影响着电能品质和水电厂的安全经济运行，对水轮机调速器的若干技术及选型进行研究，具有十分重要的现实意义。

In the first of the paper, the principals and characteristics of the hydroturbine governor are discussed and then an overview about the history, current status and trends of hydroturbine governor are introduced. Then analyzes and discuss some technology of hydroturbine governor, including with the regulating modes, regulating laws, control strategy and the disposition of hydroturbine governor.

论文概述了水轮机调速器的发展历史、研究现状和发展趋势，对水轮机调速器的调节模式、调节规律、控制策略及调速器的的系统配置等若干重要技术问题进行了分析和研究，为水轮机调速器的研究和选型得出了一些规律性的结论。

The selection and design for hydroturbine governor of the Three Gorges Project Units are presented. At last, the authour gives a summary of the whlole thesis and some suggestion about hydroturbine governor.

综合利用上述研究成果，提出了水轮机调速器的选型原则，并结合三峡电厂实际，对三峡电厂的水轮机调速器进行了选型设计。

Firstly, turbine wicket gate bearing was held; secondly, overstressing of the turbine wicket gate appeared after storage of the unit being increased; thirdly, permeable quantity of turbine wicket gate clearance was high.

1水轮机导叶轴承抱轴问题；(2)机组增容后水轮机导叶所受应力超限问题；(3)水轮机导叶间隙漏水量较大问题。

An axial hydraulic reaction type turbine with adjustable runner blades operated with a high flow rate.

轴流转桨式水轮机；卡普兰式水轮机转轮叶片可与导叶协联调节的轴流式水轮机。

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。