公开(公告)号：JPH07167092A

公开(公告)日：1995-07-04

申请号：JP26723494

申请日：1994-10-31

Applicant: ABB MANAGEMENT AG

Inventor： EDOUARUTO BURIYUUBUIRAA ,  PAURU MARUROFU

IPC: F04D29/08 ,  F01D9/06 ,  F04D29/10

Abstract: PURPOSE: To surely prevent dirt from entering a compressor passage via sealed air by designing a compressor to take the sealed air out of an inflow chamber behind an inlet filter and in front of inflow guide vanes. CONSTITUTION: This compressor for a gas turbine has rotary vanes 7 fixed around a rotor shaft 10 which is rotatable about an axis 18, and a compressor casing 2 is provided to surround the rotor shaft 10 within the region of the rotary vanes 7. An inflow casing 9 provided with an outer shell 3, an inner shell 16, and an inflow chamber 4 is provided to surround the rotor shaft 10 on the inflow side of the compressor 1. In this case, a seal casing 11 is provided at the end of the inner shell 11 while facing the rotary vanes 7 to thereby seal an inlet passage 27 against ambient air while the inlet passage 27 is positioned adjacent to the circumference of the rotor shaft 10. A sealing air chamber 12 provided in the seal casing 11 is communicated with the inflow chamber 4 via a sealing air passage 15.