| 摘要 |
An air heater perimeter seal provides independent positive control of the leak path induced by relative radial and axial movements at the rotor perimeter. A seal member with a relatively wide seal face disposed in a plane perpendicular to the air heater axis allows the seal member to stay within the radial width of the corresponding seat during expansion and contraction of the rotor as it moves from the air side to the discharge gas side and back. In addition, the installation adjustability and the tolerance for radial error of the seal of the present invention makes it possible for out-of-round rotors and warped housings to be properly sealed. An axial slip joint between the seal member and the rotor allows the seal face to remain adjacent to the face of the sector place and to the seat face regardless of rotor droop. The axial slip joint also acts as a labyrinth seal to control leakage of gasses between the housing and rotor.
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