利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN107906047A 流量系数0.0472轻介质高能头压缩机模型级及设计方法 无效 - 驳回

流量系数0.0472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0.0472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＝0.0472，设计点能头系数τ＝0.704，设计流量系数工况下的多变效率ηpcl＝0.871，应用的流量范围为设计点的0.65～1.67。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 model stage with a flow coefficient of 0.0472 for a light-medium high-energy-head compressor and a design method of the model stage. The model stage comprises an impeller, a blade diffuser, a bend and a reflux device, wherein the impeller is located at the inlet of the model stage; the blade diffuser is arranged at the outlet of the impeller; the reflux device is located at the outlet of the model stage; the blade diffuser communicates with the reflux device through the bent; the machine mach number Ma2 of the model stage is 0.2-0.65; the flow coefficient pi1 of a design point is 0.0472; the energy head coefficient tau of the design point is 0.704; the polytropic efficiency eta pcl under the flow coefficient working condition is designed to be 0.871; and the applied flow range is 0.65-1.67 of the design point. The invention further provides a design method of the model state. The model stage is high in efficiency and energy head coefficient, big in hub ratio and small in span; by adoption of the model stage, the light-medium compressor have high running efficiency and a wider working condition range; meanwhile, reduction of the operation rotational speed ofa rotor is benefited; the span of a bearing is shortened; and the stability of the rotor is improved.

0/0