共查询到18条相似文献，搜索用时 109 毫秒
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水轮机叶片型面的测量是水轮机制造和修复过程中必不可少的重要环节,叶片型面的测量结果直接影响叶片的制造精度.本文提出了一种水轮机叶片的多关节测量方法,并制造了测量机器人,对叶片的磨损情况进行了测量,取得了较好的效果. 相似文献
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简要分析了水轮机技术特性及其影响因素.在新技术条件下,应用新材料技术、模型试验测试技术、CFD技术和新制造技术,可显著优化水轮机的技术特性. 相似文献
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轴流式水轮机叶片的刚强度及模态有限元分析 总被引：1，自引：0，他引：1
运用ANSYS有限元仿真方法对某轴流式水轮机叶片在根部加厚前后的应力、变形及模态进行了研究,分析了应力缓冲槽对应力降低的贡献.结果表明,根部加厚后水轮机叶片法兰与内缘交接处应力集中现象得到显著改善. 相似文献
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胡昌荣 《长江工程职业技术学院学报》2002,19(3):38-40
将竖轴布置的反击式水轮机即正装水轮机进行倒装布置变成倒装水轮机,除了可以改善反击式水轮机的汽蚀性能之外,还可以获得许多正装水轮机所不及的优越性。如果坚持深入研究、试验,倒装水轮机会逐渐变得成熟和普及。 相似文献
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利用高新技术对水电站机组设备进行改造,提高水轮机效率,是提高水电站效益的重要途径.本文结合实例,通过对JF2558和HL702两种转轮各项性能的对比分析,对转轮换型为基础的水轮机增效技术进行介绍. 相似文献
7.
应用某电站的水轮机数据,建立水轮机三维全流道模型,以研究带副叶片混流式水轮机内部流场特征。运用CFD软件,采用Realizable k-ε模型和SIMPLE算法,对水轮机内部流动进行数值仿真,得到水轮机内部流动状况图像。可帮助了解水轮机内部水流流态,从而为水轮机稳定运行和水力优化设计提供参考。 相似文献
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张贤斌 《长江工程职业技术学院学报》2006,23(4):39-41
设计性能优良的过流部件是水轮机设计的一项重要内容.本文以混流式水轮机为例,概述了主要过流部件基本设计思想,并说明在过流部件设计方案中引入CFD进行分析,能较快地实现设计目标,并可以从CFD给出的分析结果中拓展设计思路,探索新的设计方法. 相似文献
9.
胡昌荣 《重庆职业技术学院学报》2006,15(2):136-137
将传统的竖轴布置的反击式水轮机进行倒装布置,变成反击式倒装水轮机。反击式水轮机倒装布置后可以改善汽蚀性能,同时还能获得许多正装水轮机所不及的优越性。 相似文献
10.
陈泉开 《福建工程学院学报》2009,7(4)
基于提高水能转化效率、降低水电站维护成本,改进设计了转轮标称100cm的轴流式水轮机.主要包括核心部件转轮调桨装置和导水叶传动机构的改进设计以及采用反求技术和快速成型技术取得桨叶的三维实体造型和实物模型.小微型轴流调桨式水轮机经改进已定型生产,主要用于较低水头、较大流量的农村小微型电站. 相似文献
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文章以西班牙Gamesa公司风力发电机组为例,介绍了变桨距风力发电机及其控制方式,详细分析了G52风力发电机组液压系统的结构、功能和工作原理以及主要液压元件在系统中的作用。 相似文献
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概括了现代液压技术的基本特点及其在水轮机调节装置中的应用状况；介绍了应用该技术研制的GYT系列高油压调速器的进展及其特点；总结了研制中形成的若干技术观点；提出了用该技术开发、推广新一代高油压水轮机调节装置的任务。 相似文献
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Tidal current turbines (TCTs) are newly developed electricity generating devices. Aiming at the stabilization of the power
output of TCTs, this paper introduces the hydraulic transmission technologies into TCTs. The hydrodynamics of the turbine
was analyzed at first and its power output characteristics were predicted. A hydraulic power transmission system and a hydraulic
pitch-controlled system were designed. Then related simulations were conducted. Finally, a TCT prototype was manufactured
and tested in the workshop. The test results have confirmed the correctness of the current design and availability of installation
of the hydraulic system in TCTs. 相似文献
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本文通过对水轮机选型过程中效率修正值确定问题的深入研究，阐明了效率修正值的实质、范围及确定方法。 相似文献
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Yu-jun CUI Trong Vinh DUONG Anh Minh TANG Jean-Claude DUPLA Nicolas CALON Alain ROBINET 《浙江大学学报(A卷英文版)》2013,14(4):244-255
In this study, a fouled ballast taken from the site of Sénissiat, France, was investigated. For the hydraulic behaviour, a large-scale cell was developed allowing drainage and evaporation tests to be carried out with monitoring of both suction and volumetric water content at various positions of the sample. It was observed that the hydraulic conductivity of fouled ballast is decreasing with suction increase, as for common unsaturated soils. The effect of fines content was found to be negligible. For the mechanical behaviour, both monotonic and cyclic triaxial tests were carried out using a large-scale triaxial cell. Various water contents were considered. The results were interpreted in terms of shear strength and permanent axial strain. It appeared that the water content is an important factor to be accounted for since any increase of water content or degree of saturation significantly decreases the shear strength and increases the permanent strain. Constitutive modelling has been attempted based on the experimental results. The model in its current state is capable of describing the effects of stress level, cycle number and water content. 相似文献
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ZHAN Liang-tong CHEN Ping NG C.W.W. 《浙江大学学报(A卷英文版)》2007,8(5):699-706
A laboratory study was carried out on both natural and compacted specimens to investigate the complex soil-water interaction in an unsaturated expansive clay. The laboratory study includes the measurement of soil-water characteristic curves, 1D free swelling tests, measurement of swelling pressure and shrinkage tests. The test results revealed that the air-entry value of the natural specimen was quite low due to cracks and fissures present. The hydraulic hysteresis of the natural specimen was relatively insignificant as compared with the compacted specimen. Within a suction range 0 to 500 kPa, a bilinear relationship between free swelling strain (or swelling pressure) and initial soil suction was observed for both the natural and compacted specimens. As a result of over-consolidation and secondary structures such as cementation and cracks, the natural specimens exhibited significant lower swelling (or swelling pressure) than the compacted specimen. The change of matric suction exerts a more significant effect on the water phase than on the soil skeleton for this expansive clay. 相似文献
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结合从事《水电站》教学经验和承担小型水电站设计工作,从动能经济效益和水轮机安全经济运行等方面综合分析、探讨如何合理地选择水库电站运行最低水位。 相似文献
18.
Influences affecting the soil-water characteristic curve 总被引：2，自引：0，他引：2
INTRODUCTION The soil-water characteristic curve (SWCC) gives the relationship between the amount of water in the soil (i.e. gravimetric or volumetric water content) and soil suction (i.e. matric suction at low suction and total suction at high suction). Many properties of a partially saturated soil such as the coefficient of permeability, shear strength and volume strain, pore size distribution, the amount of water contained in the pores at any suction, can be obtained from the SWCC. … 相似文献