前言螺杆压缩机具有可靠性好、效率高、不用维修等优点,因此,不仅用作空气压缩机,而且还广泛地用作其它气体压缩机。螺杆压缩机的性能,在很大程度上决定于转子啮合时的密封间隙(转子间隙),但人们对实际运转状态的转子间隙尚不十分清楚。过去研究转子的热膨胀常采用下述方法,即在螺 Introduction Screw compressors have the advantages of good reliability, high efficiency, no maintenance, etc. Therefore, not only as an air compressor, but also widely used as other gas compressors. The performance of screw compressors depends largely on the seal clearance (rotor clearance) when the rotor is engaged, but the rotor clearance for the actual operating condition is not yet known. In the past to study the thermal expansion of the rotor used in the following methods, namely in the screw