Hole liners for repair of variable vane shroud counterbore holes

摘要

A variable vane shroud (36) for a gas turbine engine (10) comprises a cylindrically shaped body, a hole (55B) arranged at a circumference of the body, and a counterbore (56B) arranged concentrically around the hole on a radially inward facing surface of the body. The hole (55B) is for receiving a trunnion (43) from a variable vane (32B) and the counterbore is for receiving a hub (45) from the variable vane (32B). A liner (52) is inserted into the hole (55B) and counterbore (56B) such that the trunnion (43) and hub (45) are provided with a contact surface. The invention also provides a method for repairing a damaged counterbore (54B) in a variable vane shroud (36). A liner (52) having a shape corresponding to a layer of material removed from the shroud is inserted into the void left by removing damaged material such that the counterbore is restored to pre-damaged dimensions.