【摘要】 气隙取气斜流通风系统是大型汽轮发电机中应用较广的一种通风方式。槽楔的取风性能直接影响通风系统的冷却效果。对汽轮发电机转子气隙取气斜流通风系统进行试验研究,讨论槽楔结构形式、结构参数(槽楔入流角α、β、槽楔高度、槽楔出流角γ)、斜流风沟阻力系数和来流风速对槽楔取风性能的影响。研究结果表明,通过改进槽楔结构设计,全隐式槽楔的取风性能可达到半隐式槽楔的取风性能;槽楔出流角也是影响取风系数的重要因素,出流角γ为73°时取风性能优于γ为90°;取风系数K不受来流风速的影响。本文的研究结果对汽轮发电机转子气隙取气斜流通风系统的设计具有指导意义。更多还原

【Abstract】 Gap-pickup diagonal flow ventilation system was widely applied in large-scale turbo-generator rotors. The pickup capability of wedges directly influences on the cooling condition of the gap-pickup diagonal flow system. A static modeling experiment for the gap-pickup diagonal flow system in the turbo-generator rotors was carried out, the effects of wedge type, structure parameters (inflow angel α, β, height of wedge, outflow angel γ ) of wedge, resistance coefficient of diagonal passage and the coming velocity on the pickup capability were discussed. The results show that the pickup capability of flat type of rotor wedge can performance same as the protuberant type of rotor wedge by improving the structure design; outflow angel γ is one of important effects of pickup capability of rotor wedge, it is much better when γ = 73° than γ = 90°, the coming velocity will not affect the pickup capability of rotor wedge. The results are helpful for design of the rotor wingding ventilation system with gap-pickup diagonal flow.更多还原