旋转失速是压缩机的常见故障 ,但诊断该故障时易和其他故障相混淆。本文从旋转失速的振动机理出发 ,归纳了旋转失速的故障识别特征。旋转失速的特征频率是成对出现的 ,随流量的减少而降低。该故障特征在现场诊断时得到验证 ,并成功应用于现场诊断 Rotating stall is a common compressor failure, but diagnosing the fault easily confused with other failures. In this paper, starting from the vibration mechanism of rotating stall, the fault identification features of rotating stall are summarized. The characteristic frequencies of spin-off stalls appear in pairs, decreasing as the flow rate decreases. This fault feature was validated on-site diagnostics and successfully applied to field diagnostics