Abstract The invention relates to a turbo machine rotor structure employing a thru-bolt extending through the rotor assembly and attached at its ends to stub shafts. Force producing means is provided to exert a restraining force between the rotor assembly and the thru-bolt to maintain the thru-bolt properly preloaded and centered in the rotor assembly in the preferred arrangement. A sleeve member has an end portion fixedly secured on the thrubolt as by a shrink fit. The remainder of the sleeve is formed with slots extending from the opposite end of the sleeve and terminating at the fixed end portion thereof. The slots form circumferentially spaced apart resilient cantilever portions extending from the fixed portion of the sleeve and being spaced in concentric relation to the thru-bolt and the bore of the rotor assembly. The rotor assembly is provided with means such as radially disposed screw members for exerting a radially inward force against the free ends of the cantilever portions and serving to center the thru-bolt in respect to the rotor assembly and to exert a restraining preloading force on the cantilever portions.
A rotor structure for turbo machines comprising a thru-bolt, a stub shaft fixed to each end Of said thru-bolt, a rotor assembly mounted intermediate said stub shaft and being fixedly secured thereto, said assembly being formed with an axially extending bore passage spaced concentrically about said thrubolt, and force producing means carried in part by said rotor assembly and adjustable to exert a radial inward restraining force of variable magnitude on said thru-bolt, said force producing means including a sleeve member fixedly mounted on said thru-bolt and formed with a circular series of resilient cantilever portions extending in concentric spaced relation to said thru-bolt and the bore in said rotor assembly.
Claim 2
Dependent Claim
111 words
A rotor structure for turbo machines comprising a thru-bolt, a stub shaft fixed to each end Of said thru-bolt, a rotor assembly mounted intermediate said stub shaft and being fixedly secured thereto, said assembly being formed with an axially extending bore passage spaced concentrically about said thrubolt, and force producing means carried in part by said rotor assembly and adjustable to exert a radial inward restraining force of variable magnitude on said thru-bolt, said force producing means including a sleeve member fixedly mounted on said thru-bolt and formed with a circular series of resilient cantilever portions extending in concentric spaced relation to said thru-bolt and the bore in said rotor assembly.
Claim 3
Dependent Claim
51 words
A rotor structure as set forth in claim 1, wherein said sleeve member includes an end portion fixedly secured to said thru-bolt in the medial area thereof, and means mounted in said rotor assembly for engagement with said cantilever portions and operable to exert an inward pressure of varying extent thereon.