Patent ID: 9739150
Date: 2017-08-22
CPC Classifications: F01D,F05D

Claim:
1. A turbomachine, comprising: a low-pressure turbine drum having an axis of rotation; and a wall with a profile of revolution about the axis of rotation of the drum, the wall forming a hollow body; a plurality of pairs of annular retaining surfaces, each pair being formed by an annular body on an outer surface of the wall; a plurality of rows of blades, each blade comprising a platform provided with two corresponding retaining surfaces mating with one of the pairs of annular retaining surfaces on the wall; wherein each pair of retaining surfaces of the drum wall generally diverge from one another to form a profile that widens when going radially outwards from the outer surface of the wall; and wherein at least one of the annular body comprises an annular groove opening radially outwards holding a seal in the shape of a toroid for pressing against platforms of one of the rows of blades, the blades of said row being on said body, by centrifugal force during rotation of the drum.