Patent ID: 9739160
Date: 2017-08-22
CPC Classifications: F01D,F05D

Claim:
1. An adjustable blade root spring device for fixing a turbine blade in position in a rotor disk in a gas turbine, said device comprising: an outer body including opposing side walls and first and second end blocks; an accordion spring characterized by a plurality of straight segments folded in an alternating fashion into an accordion shape, with an apex point between each of the straight segments; a spring bracket attached to a first end of the accordion spring; an L-bracket attached to a second end of the accordion spring; a coil spring; an elongated washer; and a bolt, said bolt arranged to pass through the elongated washer, through the coil spring and through a hole in the spring bracket, said bolt being threaded into a hole in the first end block of the outer body, where threading the bolt into the hole in the first end block compresses the coil spring against the spring bracket and causes the accordion spring to increase in height such that the accordion spring presses the turbine blade radially outward relative to the rotor disk.