Shroud ring for an axial flow turbine

Details Shroud ring for an axial flow turbine Shroud ring for an axial flow turbine

1992-07-22

1993-08-24

Kwon, John T.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

4151736, 4151711, F01D 1102

Patent

active

052383644

ABSTRACT:
In a device for sealing the gap between the rotor blades and the casing (2) of a turbomachine, configured with a conical profile (28), the rotor blades (6) are fitted with circumferential shroud plates (11), which seal by virtue of serrations (12, 13, 14) against the casing by the formation of radial gaps (16, 17). The tips (24, 29) of the conical ends of the blades (6) seal against the casing (2) at the inlet and outlet ends, and the shroud plate (11) located centrally at the end of the blade has three throttle locations relative to the casing, the inlet end throttle location bounding a diagonal gap (19). The end of the blade is provided with a positive offset (31) relative to the passage profile, which protrudes into a gap relief chamber (25) located in the vane carrier (2).

REFERENCES:
patent: 2910269 (1959-10-01), Howorth et al.
patent: 3677660 (1972-07-01), Taniguchi et al.
patent: 3876330 (1975-04-01), Pearson et al.
patent: 4295787 (1981-10-01), Lardellier
patent: 4370094 (1983-01-01), Ambrosch et al.
patent: 4576551 (1986-03-01), Olivier et al.
patent: 4623298 (1986-11-01), Hallinger et al.
patent: 4662820 (1987-05-01), Sasoda et al.
patent: 4710102 (1987-12-01), Ortolano

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