초록 ▼

The invention provides a turbine blade retention device installed in an axially extending gap between the blade root bottom and the slot floor. The retention device has two parts: a blade root retention clip and a spacer bar. The clip has an elongated web of a selected web thickness and width less t

The invention provides a turbine blade retention device installed in an axially extending gap between the blade root bottom and the slot floor. The retention device has two parts: a blade root retention clip and a spacer bar. The clip has an elongated web of a selected web thickness and width less than the width of the slot floor. The clip includes a forward and a rearward transverse flange extending radially outwardly and extending laterally from forward and rearward ends of the web. The flanges serve to engage the forward and rearward faces of the rotor hub disk respectively, and to engage forward and rearward faces of an associated blade root. The height of at least one flange is less than the gap depth to permit conventional sliding installation the blade root. The spacer bar is installed in the gap between the clip and slot floor to hold the clip radially outward in engagement with the forward and rearward faces of the blade root. The spacer bar has a thickness that, together with the clip web thickness, substantially equals the gap depth. Preferably, the spacer bar extends axially through the gap and has forward and rearward bent over tabs for engaging the forward and rearward faces of the rotor disk hub.

대표청구항 ▼

[ What is claimed is:] [1.] A turbine blade retention device for use in an axially symmetric turbine rotor assembly including a rotor hub disk having a thickness, a forward face and a rearward face with a peripheral circumferential array of spaced apart blade retention slots extending between the fo

[ What is claimed is:] [1.] A turbine blade retention device for use in an axially symmetric turbine rotor assembly including a rotor hub disk having a thickness, a forward face and a rearward face with a peripheral circumferential array of spaced apart blade retention slots extending between the forward and rearward hub faces at a selected angle thereto, each slot having a radially inward floor of a selected width and two side walls, the slot side walls each having mating ridges and grooves adapted for sliding engagement with a blade root of a turbine blade, the root having lateral sides disposed at said angle to forward and rearward root surfaces,wherein the blade root has a bottom surface which when engaged in said slot, is radially spaced from and adjacent the slot floor thus defining a gap extending between the forward and rearward hub faces at said selected angle, the improvement characterised in:the turbine blade retention device comprising:a blade root retention clip having an elongated web and including a forward and a rearward transverse flange extending radially outwardly and extending laterally from forward and rearward ends of the web, the web being disposed at said angle relative to the transverse flanges, the web adapted to be disposed in the gap with the height of at least one flange when the web rests on the slot floor not exceeding the gap depth to permit sliding engagement of the blade root in the slot, the flanges of said clip adapted to engage the forward and rearward faces of the rotor hub disk and the forward and rearward faces of an associated blade root when slid radially outward once the blade root is engaged in the slot; andclip securing means for holding the clip radially outward to engage the forward and rearward faces of the blade root and rotor hub disk when assembled.