TURBINE BLADE TIP SHROUD

摘要

A turbine blade tip shroud (22C, 22D) with a seal rail (32C, 32D) oriented in a circumferential direction of rotation (29) relative to a turbine axis, and extending radially outward from the tip relative to the turbine axis. A first tooth (48, 68) and a second tooth (50, 70) form respective downstream and upstream lateral departures or bumps on the seal rail. Each tooth has a sharp top leading edge (48, 50, 68, 70) and a smoothly curved side surface (49, 51, 69, 71). A back portion (56, 76) of the seal rail may span linearly from a lateral peak (66, 78) of the second tooth to a back end (62) of the seal rail that is centered on an extended centerline (60) of a front portion (54, 74) of the seal rail. The teeth may be disposed proximate or over a stacking axis (52) of the blade.

主权项

1. A turbine blade tip shroud, comprising
a seal rail oriented in a circumferential direction of rotation relative to a turbine axis, and extending radially outward from a shroud relative to the turbine axis; and a first tooth and a second tooth extending respectively downstream and upstream from the seal rail with respect to a working gas flow, each tooth comprising a sharp top leading edge and a smoothly curved side surface; wherein a back portion of the seal rail spans linearly from an upstream peak of the second tooth to a back end of the seal rail that is centered on an extended centerline of a front portion of the seal rail.