Gas turbine engine

Rotary kinetic fluid motors or pumps – With shaft connected fluid force subjected thrust balancing...

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415107, F01D 304

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active

058367390

ABSTRACT:
A gas turbine engine comprises turbine and compressor elements on a rotary shaft. The shaft is rotably mounted on preloaded axial thrust bearings. As it rotates in use the turbine and compressor elements create an axial thrust load on the bearings. According to the invention that axial thrust load is opposed by an electromagnetic coil which is energised to exert an axial force on the shaft in opposition to the axial thrust load and preferably completely balancing the axial thrust load. Bearing life is much extended.

REFERENCES:
patent: 4057369 (1977-11-01), Isenberg et al.
patent: 4725197 (1988-02-01), Russell et al.
patent: 4775291 (1988-10-01), Culbertson et al.
patent: 5104284 (1992-04-01), Hustak, Jr. et al.
patent: 5127792 (1992-07-01), Katsuta et al.
patent: 5248239 (1993-09-01), Andrews
patent: 5445494 (1995-08-01), Hanson

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