ApplicationNo. 289484 filed on 08/11/1994
US Classes:277/413, Having adjustable member277/419, Interfitting or overlapping415/170.1, BEARING, SEAL, OR LINER BETWEEN RUNNER PORTION AND STATIC PART415/173.2, Selectively adjustable415/173.5, Labyrinth seal415/174.1Selectively adjustable
ExaminersPrimary: Cuchlinski, William A. Jr.
Assistant: Hwang, Keith
Attorney, Agent or Firm
Foreign Patent References
International ClassF16J 015/447
AbstractArcuate seal segments have radially directed seal faces forming part of a labyrinth seal in a turbine. The segments are adjustably spaced from the locating flanges of the groove formed on a stationary part of the turbine housing to compensate for any distortion of the groove through use. In a positive pressure, variable clearance labyrinth seal, side seals are disposed between the locating flanges of the groove and the flanges of the seal segments and have surfaces at circumferentially spaced positions which are adjustable to maintain concentricity of the seal faces of the seal segments, notwithstanding the distortion of eccentricity of the groove and its locating flanges. Where the locating flanges of the segments normally engage the locating flanges of the groove, variable clearances are provided between those flanges by the interposition of dowels, plugs or pads such that the seal faces of the segments are maintained concentric, notwithstanding distortion of the locating fits.