Development of Vibrating Monitoring for Hydro Power Turbines under Operating Condition

Units and components of the powerful power equipment are exposed to the big static and dynamic load. An example of such equipments is turbines hydraulic power plant and, especially, hydroelectric pumped storage power plant. Existing techniques of control of a vibrating condition do not consider： very wide frequency range of vibrating processes, difficult character of such processes in the form of the sum multiharmonic, random and close to shock processes. Such techniques usually do not consider intervals of start-up and stop, and also work on transitive modes when loadings on a construction are maximum. Available techniques of an estimation of admissible level of vibrating influence and tests for vibration durability are not harmonized enough among themselves. Various known interpretations of communication of vibrating characteristics and durability estimations on mechanical pressure at broadband vibrating influence yield ambiguous result. On the basis of the analysis of the published information, we attempt to formulate the requirement to system of vibrating monitoring of the hydraulic turbine and power motor pumps. System should provide data acquisition and the analysis of the data on a vibrating condition taking into account accumulation of vibrating influences and long term of operation on the basis of estimation methods as low-cycle, and high-cycle （gigacycle） fatigue is made.     

可再生能源新发明

精细的太阳能"花瓣"路灯为了满足城市街道照明的需要,荷兰皇家菲利普电子公司(Phillips)在太阳能发光二极管(LED)路灯的精细设计制作上有新的突破。受到花朵如何在阳光下开放以收集太阳能量的启发,该公司研究人员推出的"可持续城市之     

丹麦计划建世界最大海上风电场

日期,丹麦政府计划在波罗的海上建设一个有200座风力涡轮机的巨型海上风电场。这座巨型风电场装机容量将达60万千瓦,可以为60万个家庭同时供电,建成后将和丹麦电网、德国电网和瑞典电网连接．其发电能力将是现在世界上最大风、电场的3倍。     

全球风电复合材料发展概况

概述了复合材料风轮叶片的规格、产量和市场价值,着重介绍了叶片各部分的制造工艺实例和制造叶片用的各种材料的研发情况。风力发电是在全球范围内迅速发展的行业。20年来的技术和市场开发使风力发电从复合材料的边缘应用变成全球复合材料最兴旺的市场之     

海外化工

拜耳材料科技聚氨酯系统使智能化能源发电成为可能西班牙公司Kliux Energies-Geólica Innovations SL针对风能开发了一种全新的智能化技术。该系统采用垂直设置的特殊转子,使其能够始终面朝风向。Kliux风力涡轮机几乎可安装在任何位置,所产生电力用于本地消耗。转子叶片材料     

76亿美元

9月22日,据路透社报道,德国工业巨头西门子,已同意以76亿美元全现金形式收购美国油田设备制造商德莱赛兰,以获得德菜赛兰集团的用以油气产业的压缩机和涡轮机业务。业内人士指出,这将大力提振西门子存北美的油气开采能力。     

英国计划利用路面凸起减速带发电

英国伦敦计划利用汽车驶过路拱（即路面凸起减速带）时产生的能量发电,只要有稳定的车流,四个新型路拱就可以使1英里（1．6公里）长的街道上路灯、红绿灯和路牌照亮,10个新型路拱相当于一个风力涡轮机。     

空气涡轮机隔板试制工艺攻关探讨

主要围绕空气涡轮机隔板试制工艺难点进行分析,经过空气涡轮机隔板试件的一系列试验,确定隔板试制的工艺方案,优化铝合金材料加工的切削参数,对空气涡轮机隔板试制工艺攻关作了详细的分解,确保了空气涡轮机隔板加工质量和加工精度,为今后同类产品加工积累了可贵的经验.     

Simulation of 3D flow in turbine blade rows including the effects of coolant ejection

This paper describes the numerical simulation of three-dimensional viscous flows in fir-cooled turbine blade rows with the effects of coolant ejection. A TVD Navier-Stokes flow solver incorporated with Baldwin-Lomax turbulence model and multi-grid convergence acceleration algorithm are used for the simulation. The influences of coolant ejection on the main flow are accounted by volumetric coolant source terms. Numerical results for a four-stage turbine are presented and discussed.