Method of servicing turbine seal
AssigneeInnovative Technology Limited
InventorsWilliam P. Sanders, Anthony F. Mitola
Life of this patent
Estimating the term…
Abstract
A rubbing strip is used in conjunction with the sealing strips of a seal to prevent contact between the sealing strips and a rotating member with which the sealing strips form a seal. The rubbing strip comprises a strip of material which is oriented coaxially with the sealing strips and which has a clearance with respect to the rotating member which is less than the least of the clearances provided by the sealing strips with which it is associated. The material and the cross-sectional shape of the rubbing strip may be selected in accordance with desired wear properties. The rubbing strip may be formed integrally with a sealing ring, or may be formed to be inserted into complementary receiving means on a sealing ring.
Claims2
A method of servicing a seal of a turbine, said seal comprising a plurality of axially separated sealing strip segments, each sealing strip segment having an internal radius capable of providing a radial clearance with respect to a rotor of said turbine, said method comprising:
- (a) determining a desired radial clearance for sealing strip segments of said seal;
- (b) removing a sealing strip segment of said seal;
- and
- (c) providing in place of said sealing strip segment a rubbing strip segment, said rubbing strip segment having an internal radius capable of providing a radial clearance with respect to said rotor which is less than the desired radial clearance determined for said sealing strip segments, whereby said rubbing strip segment prevents contact between said sealing strip segments and said rotor.
Dependencies are inferred from the claim text.