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发明公开
CN107906048A 流量系数0.0154轻介质高能头压缩机模型级及设计方法 无效 - 撤回

流量系数0.0154轻介质高能头压缩机模型级及设计方法
摘要：
本发明提供流量系数0.0154轻介质高能头压缩机模型级，包括叶轮、叶片扩压器、弯道及回流器，叶轮位于模型级的入口位置，在叶轮的出口设有叶片扩压器，回流器位于模型级的出口位置，叶片扩压器与回流器通过弯道相连通；模型级的机器马赫数Ma2＝0.2-0.65，设计点流量系数Φ1＝0.0154，设计点能头系数τ＝0.68，设计流量系数工况下的多变效率ηpol＝0.8011，应用的流量范围为设计点的0.71～1.66。还提供该模型级的设计方法。本发明的模型级效率高、能头系数高、轮毂比大，跨距小，采用该模型级可以使得轻介质压缩机具有较高的运行效率和较宽的工况范围，同时有助于降低转子工作转速，缩短轴承跨距，提高转子的稳定性。
摘要（英）：

The invention provides a light-medium high-energy head compressor model stage with a flow coefficient of 0.0154. The model stage comprises an impeller, a blade diffuser, a curve and a flow returner; the impeller is positioned in an inlet position of the model stage; the blade diffuser is arranged in an outlet of the impeller; the flow returner is positioned in an outlet position of the model stage; the blade diffuser communicates with the flow returner through the curve; a machine mach number Ma2 of the model stage is 0.2-0.65; a design point flow coefficient phi 1 is 0.0154; a design point energy head coefficient t is 0.68; a various frequency npol under design flow coefficient working conditions is 0.8011; and an applied flow range is 0.71-1.66 of a design point. The invention further provides a design method of the model stage. The model stage is high in efficiency, high in energy head coefficient, high in hub ratio and small in span; the model stage can be adopted to enable a light-medium compressor to achieve higher operation efficiency and wider working condition range; and meanwhile, the reduction of the rotor work rotating speed is facilitated, the bearing span is shortened, and the rotor stability is improved.

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