共查询到19条相似文献,搜索用时 46 毫秒
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对立轴冲击式机组而言 ,主要存在断斗、甩油、振动及噪音超标等隐患。文章主要介绍白水河二级水电站水机设计中 ,解决上述问题的设计思路及采取的措施 相似文献
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文章以冯家山灌区张谢泵站更新改造工程的水机设计为例,阐述了泵站设计中水泵及水力辅助设备的选用和基本设计方法。 相似文献
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宝泉抽水蓄能电站技施设计阶段水机专业采用了三维设计,三维设计具有期短、修改工作量小、设计变更快捷、减少设备布置之间的碰撞和干扰等优点。宝泉工程水利专业直接利用三维设计出图2套,间接出图6套,为三维设计的推广积累了经验。 相似文献
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知识经济是以知识为基础的经济。知识经济是指区别于以往的以传统工业为产业结构,以稀缺自然资源为主要依托的新型经济。水电事业虽是传统的工业经济,但其开发利用的不是稀缺自然资源而是水,从能源配置上来看,水电事业带有知识经济成分。要利用科技知识、管理科学与行为科学知识,来更好地开发水电事业,尤其是黄河上游水电资源。 相似文献
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崔敬欣 《河北水利水电技术》2003,(4):38-39
水机自动化的控制设计直接决定着电站自动化水平的高低,因而水轮发电机组及辅助设备的自动控制是实现整个水电站自动化的基础。扼要提出了水机自动化设计中应注意的几个问题. 相似文献
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通过对近年来由我院设计的大化、岩滩和百龙滩等水电站的实际运行情况的调查,针对机械设备选型和设备布置中存在的不足之处,提出关键设备选用进口产品,阀门以选用阀为主,油处理设备及水泵基础旁增设排油沟和排水沟等改进措施,以便在新电站的设计工作中肿取经验教训,提高电站设计质量。 相似文献
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针对水力机械技术的现状和发展趋势,结合龙桥水电站工程进行部分设计优化.主要有:透平油系统设备、桥式起重机试重块、技术供水系统、通风系统、检修排水系统、水机管路布置、压力钢管排水系统等.通过设计的优化,水力机械设备管路的布置更加合理,安全运行的可靠性得到更好的保障. 相似文献
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针对许多液压启闭机优化布置模型难以求解的缺点,另选2个优化布置变量,建立液压启闭机优化布置模型。详细推导了启闭机最大启闭力、工作行程与该变量的关系;并导出启闭机最大启闭力与工作行程关系曲线。阐述了利用该曲线求解优化布置模型的方法。 相似文献
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万家寨水电站水力机械设计 总被引:1,自引:0,他引:1
龚长年 《水利水电工程设计》1999,(1):6-8
黄河万家寨水利枢纽年平均输沙量1.49亿t,设计多年平均含沙量6.6kg/m3,预测建库后汛期水轮机过机平均含沙量8~12kg/m3,如此大的含沙量,给电站的水力机械设计带来了很大难度,水力机械应既能在高含沙水流条件下安全可靠的运行,又要在清水条件下发挥出较高的运行效益。因此,万家寨水电站水力机械设计思想是:汛期高含沙量条件下注重设备的安全稳定运行;非汛期低含沙量条件下充分发挥设备的高性能,并为设备的运行维护创造便利的条件。 相似文献
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水力机械转轮流固耦合特性分析与设计要素研究 总被引:1,自引:0,他引:1
水力机械种类繁多、流动复杂,转轮流固耦合动力特性及如何考虑设计要素对机组安全稳定运行极为重要。论文基于现代水力机械流动分析技术及流固耦合特性分析方法,对转轮的关键设计要素进行探讨,并展示了本课题组在转轮内部流动物理现象如漩涡、空化、压力脉动、含沙水流运动等的模拟、分析、预测方面的技术方法及成果,以及转轮共振和疲劳破坏的流固耦合动力特性分析案例,并对新电站机组选型设计、老电站改造、新型机组研发方面的工程应用进行分析,同时展望了多场计算技术、转轮寿命预测、信息共享平台建立等方面的发展前景。 相似文献
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A review of cavitation in hydraulic machinery 总被引:2,自引:0,他引:2
《水动力学研究与进展(B辑)》2016,(3)
This paper mainly summarizes the recent progresses for the cavitation study in the hydraulic machinery including turbopumps, hydro turbines, etc.. Especially, the newly developed numerical methods for simulating cavitating turbulent flows and the achievements with regard to the complicated flow features revealed by using advanced optical techniques as well as cavitation simulation are introduced so as to make a better understanding of the cavitating flow mechanism for hydraulic machinery. Since cavitation instabilities are also vital issue and rather harmful for the operation safety of hydro machines, we present the 1-D analysis method, which is identified to be very useful for engineering applications regarding the cavitating flows in inducers, turbine draft tubes, etc. Though both cavitation and hydraulic machinery are extensively discussed in literatures, one should be aware that a few problems still remains and are open for solution, such as the comprehensive understanding of cavitating turbulent flows especially inside hydro turbines, the unneglectable discrepancies between the numerical and experimental data, etc.. To further promote the study of cavitation in hydraulic machinery, some advanced topics such as a Density-Based solver suitable for highly compressible cavitating turbulent flows, a virtual cavitation tunnel, etc. are addressed for the future works. 相似文献
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《水动力学研究与进展(B辑)》2017,(5)
Hydraulic machinery mainly includes turbine and pump, which is closely related to national economy and people's livelihood involving aerospace industry, marine engineering, hydropower engineering, petroleum industry, chemical industry, mining industry, biomedical engineering, environmental engineering, agricultural water-soil engineering, etc.. The internal flow of hydraulic machinery is extremely complex, and its characteristics can be summarized as high Reynolds number, multi-scales, inhomogeneous and vortex-dominant unsteady turbulence which interact with the rotating dynamic boundary(rotor blade). Based on the analysis of the internal flow characteristics of hydraulic machinery, the author and his research team successively proposed a rotation correction model, a curvature corrected filter-based model, a scalable detached eddy simulation method, and a non-linear hybrid RANS/LES turbulence model to capture unsteady flow structures and then predict hydraulic performance and dynamic characteristics more accurately. According to the analysis on the internal flow, the corresponding flow control measures were put forward. It was verified by experiments that these methods could significantly improve the hydraulic performance, anti-cavitation performance and dynamic characteristics(pressure pulsation and vibration) of hydraulic machinery in a certain range of operating conditions. In addition, the mechanism how flow control measures influence internal flow was analyzed in depth, aiming at finding a feasible and effective way to improve hydraulic performance, anti-cavitation performance and dynamic characteristics of hydraulic machinery. 相似文献
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居龙滩水电站水力机械设计 总被引:1,自引:0,他引:1
居龙滩水电站是江西省赣州电网一座装机60MW的水电站,安装了2台灯泡贯流式水轮发电机组,是赣州市水利电力勘测设计研究院自行设计装机容量最大的水电站。对其水轮机的主要性能参数、水轮机的结构特点、油气水、水力测量等辅助设备系统及桥式起重机的设计作了简要的介绍。 相似文献