Belly band seal with underlapping ends

摘要

A sealing band for use in a turbomachine having a plurality of stages, each stage comprising a rotatable disk and blades carried thereby. At least one pair of adjacent rotatable disks define an annular gap therebetween and have respective opposing sealing band receiving slots aligned with the annular gap. The sealing band includes a plurality of seal strips located in series adjacent to one another, and adjacent seal strips include opposing end faces located in facing relationship adjacent to one another. An underlap portion is affixed adjacent to an end of at least one seal strip and extends past the end face of an adjacent seal strip, along a radially facing side of the adjacent seal strip.

主权项

1. A sealing band for use in a turbomachine having a plurality of stages, each stage comprising a rotatable disk and blades carried thereby, at least one pair of adjacent rotatable disks defining an annular gap therebetween and having respective opposing sealing band receiving slots aligned with the annular gap, the sealing band comprising:
a plurality of adjacent seal strips located in series adjacent to one another, and the adjacent seal strips including opposing end faces located in facing relationship adjacent to one another wherein said seal strips have a width greater than said annular gap; an underlap portion is affixed adjacent to an end of at least one of said seal strips and extends past the end face of an adjacent one of said seal strips, along a radially facing side of said adjacent one of said seal strips; and wherein said underlap portion has a width, extending across said gap, that is less than a width of said at least one seal strip and said underlap portion has a width no greater than said annular gap.