A developing trend for the high-speed centrifugal compressor is predicted. The non-oil seal will gradually take the place of the wet seal and it will obtain zero leakage of the seal unit.

• 最后，对高速离心压缩机发展趋势做出了展望，提出无油密封将逐渐取代湿式密封，真正达到密封装置的介质的“零泄漏”。