Gas turbine conical flange bolted joint

摘要

A bolted flange assembly for securing rotating components in a gas turbine. The bolted flange assembly includes two rotating wheels, each wheel having at least one arm extending towards a spacer positioned partially between the two rotating wheels, wherein each arm has a flange surface facing the spacer. Either each flange surface or a surface of the spacer is conical, i.e., non-perpendicular to a centerline of the gas turbine, such that in an unconstrained state, a heel end of each flange surface is closer to the spacer than a toe end of each flange surface; and a bolt extending through the arm of each rotating wheel and the spacer.

主权项

1. A bolted flange assembly for securing rotating components in a gas turbine, the bolted flange assembly comprising:
two rotating wheels, each wheel having at least one arm extending towards a spacer positioned partially between the two rotating wheels, a flange surface disposed on each arm, wherein the flange surface faces the spacer, and at least a portion of each flange surface is non-perpendicular to a centerline of the gas turbine, wherein the spacer includes a first portion disposed between the arms of the two wheels and a second portion that is substantially perpendicular to the first portion, the first portion extending further in a radially outward direction than the flange surface of each arm, and the second portion being disposed radially outward of the flange surface of each arm such that a rabbet interference fit exists between the second portion and a toe end of each flange surface, and in an unconstrained state, a heel end of each flange surface is closer to the spacer than the toe end of each flange surface; and a bolt extending through the arm of each rotating wheel including the flange surface, and the spacer.