High speed aerospace generator resilient mount, combined centering spring and squeeze film damper
AssigneeHoneywell International Inc.
InventorsDAVID E. STOUT, BALWINDER S. BIRDI, EDWARD M. DOWN, WALTER L. MEACHAM
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Abstract
A rotor mount assembly for an electrical machine, such as a high speed aerospace generator, comprises a spring having a simple annular structure together with an oil squeeze film damper (SFD). The spring is engineered to move the rotor critical speeds outside of the extremes of the operating speed range and the SFD damps out the rotor responses as the speed passes through these points.
Claims20
An assembly for an electric machine having a rotor shaft, a bearing assembly and a support housing comprising:
- a spring member, said spring member having an annular structure that receives said bearing assembly;
- and
- a supply of oil that forms a squeeze film damper for said rotor shaft, said supply of oil in contact with said annular structure.
An assembly for an electric machine having a rotor shaft, a bearing assembly and a support housing comprising:
- a tube spring having an annular structure and a flange, said annular structure positioned radially outward from said bearing assembly, said flange fixed to said support housing;
- and
- a squeeze film damper formed by a gap between an inner diameter surface of said support housing and an outer diameter surface of said annular structure.
An assembly for an electric machine having a rotor shaft, a bearing assembly and a support housing comprising:
- a ring spring comprising an annular structure, a plurality of inner lobes and a plurality of outer lobes, said inner lobes integral to and positioned radially inward from said annular structure, said outer lobes integral to and positioned radially outward from said annular structure;
- and
- a supply of oil in contact with said ring spring such that a squeeze film damper is formed.
Dependencies are inferred from the claim text.