Method to center locate cutter teeth on shrouded turbine blades

摘要

The present application further describes a method for extending the operating life of a tip shrouded turbine blade that includes the steps of: 1) removing an end located cutter tooth from a seal rail of a tip shroud, the end located cutter tooth including a cutter tooth located at the end of one of the suction side and pressure side of the seal rail of the tip shroud; and 2) attaching a center located cutter tooth to the seal rail of the tip shroud, the center located cutter tooth including a cutter tooth that is located in the approximate center of the seal rail of the tip shroud. In such method, the center located cutter tooth may be attached to the seal rail such that the center located cutter tooth is inside the airfoil if it were projected radially outward from the narrowest point below a tip shroud fillet.

主权项

1. A method for extending the operating life of a tip shrouded turbine blade, the method comprising the steps of:
removing an end located cutter tooth from a seal rail of a tip shroud; and attaching a center located cutter tooth to the seal rail of the tip shroud; wherein the center located cutter tooth is smaller than the end located cutter tooth wherein the center located cutter tooth comprises a radial height that is less than a radial height of the end located cutter tooth; and wherein the center located cutter tooth comprises an axial thickness that is less than an axial thickness of the end located cutter tooth.