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   水轮机叶片 在 电力工业 分类中 的翻译结果: 查询用时:0.359秒
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水轮机叶片
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  hydraulic turbine blade
Mobile platform for hydraulic turbine blade repair robot
      
The wall-climbing mobile platform (MP) of a robot for repairing a hydraulic turbine blade onsite is developed.
      
The platform can automatically adapt to complex spatial surfaces, which satisfy the requirements of a hydraulic turbine blade in-situ repair robot.
      
The system was specifically developed to measure two types of hydraulic turbine blade with dimensions of approximately 1.5m x 1.5m x 0.5m.
      


In this paper,water has been used to simulate the bottom-sides gating system of the large hydro-turbine blades by means of high-speed and con- tinuous photographic techniques.The experimental reslts show the propriety of the utilization of the open gating ratios in this case,otherwise unsteady mould- filling phenomena such as splashing and severe fluctuation of liquid surfaces will likely take place.The results have also shown a minor amount of water flowing into the bilateral gates,which will be detrimental...

In this paper,water has been used to simulate the bottom-sides gating system of the large hydro-turbine blades by means of high-speed and con- tinuous photographic techniques.The experimental reslts show the propriety of the utilization of the open gating ratios in this case,otherwise unsteady mould- filling phenomena such as splashing and severe fluctuation of liquid surfaces will likely take place.The results have also shown a minor amount of water flowing into the bilateral gates,which will be detrimental to adjust the casting tempera- ture fields,to raise the longitudinal temperature gradients and to reinforce the feeding effects,

采用高速摄影、连续拍照等技术手段,对大型水轮机叶片底侧式浇注系统的充型过程进行了水力模拟研究。研究结果表明:大型水轮机叶片底侧式浇注系统采用开放式的浇道比为宜。否则易产生喷溅、型腔液面波动大等充型不平稳现象。根据高速摄影的测量结果,底侧式浇注系统两侧分配浇道进水量偏少,对调整铸件温度场、提高纵向温度梯度、增强补缩效果是不利的。

A distribution of .common pressure field for runneds blades and its conversionmethod are induced by means of summarizing the test results of Kaplan turbine athome and abroad and applying some theory.The method of calculating stress,staticshifting and natural frequency and their similitude criterion are provided. According to the criterion, the necessary data are obtained rapidly from the present,results instead of complicated calculation. Primary inquiry into optimization cons truction of runner blade are presented...

A distribution of .common pressure field for runneds blades and its conversionmethod are induced by means of summarizing the test results of Kaplan turbine athome and abroad and applying some theory.The method of calculating stress,staticshifting and natural frequency and their similitude criterion are provided. According to the criterion, the necessary data are obtained rapidly from the present,results instead of complicated calculation. Primary inquiry into optimization cons truction of runner blade are presented in the basis of above achivments.

本文通过总结分析国内外轴流式水轮机叶片试验资料,应用有关理论知识,归纳了一种近似的叶片通用压力场分布及其换算方法,并套用于各种水头段的叶片进行有限元计算,找到了轴流式叶片应力、静位移和固有频率计算方法。通过理论分析得出了叶片应力。静位移及固有频率相似准则,应用这些准则,不用进行繁琐的重复计算,利用现有成果就可很快得到所需数据。在上述成果基础上,对叶片结构优化进行了初步探讨。

rom the point of view of NC programming,the methods of NC millingFrancis turbine blades and some problems occured during machinig and improving of machining precision and efficiency are described in this paper.

本文着重从数控加工编程的角度介绍混流式水轮机叶片数控加工方法、加工中的一些实际问题以及如何提高叶片加工精度、效率。

 
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