Sealing device for axial flow turbine

Details Sealing device for axial flow turbine Sealing device for axial flow turbine

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F01D 11/08 (2006.01) F01D 11/00 (2006.01) F01D 11/02 (2006.01) F01D 25/00 (2006.01) F02C 7/00 (2006.01) F02C 7/28 (2006.01) F16J 15/16 (2006.01) F16J 15/26 (2006.01)

Patent

CA 2264996

A sealing ring is formed by arranging a plurality of segments around the shaft of a rotor of an axial flow turbine with their outer parts received in a holding groove formed in an inner ring included in a nozzle diaphragm. Flat plate springs press the segments of the sealing ring radially inward, and curved plate springs press the segments of the sealing ring radially outward. The pressing forces of the flat plate springs and the curved plate springs are determined so as to compensate the differences in pressing forces acting on the segments of the sealing ring attributable to the respective own weights of the segments of the sealing ring. The flat plate springs and the curved plate springs prevent the irregular movement of the segments of the sealing ring, ensure the smooth radial movement of the segments of the sealing ring, and prevent contact between sealing fins attached to the segments of the sealing ring and the shaft of the rotor of the axial flow turbine.

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