Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1975-11-20
1977-05-24
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
416195, 416196R, F01D 522
Patent
active
040252329
ABSTRACT:
A turbo machine rotor assembly which includes a turbine wheel having moving blade covers or connecting pieces connected to adjacent moving turbine blades. Each of the moving turbine blades includes a first ledge and second ledge at a leading edge and trailing edge side portions, respectively, of the tip of the blade with the first and second ledge portions extending substantially in tangential directions of the turbine wheel but in opposite directions to each other. One of the first and second ledges is provided with a through hole or aperture extending radially of the turbine wheel. The moving blade cover or connecting piece is provided with a pair of spaced pins receivable in the apertures of the first and second ledges for connecting the first ledge of one moving turbine blade and the second ledge of an adjacent moving turbine blade in such a manner that the upper surface of the cover contacts with the lower surfaces of the first and second ledges. One of the pins is loosely fitted in one aperture and the other pin is provided with a flared head portion for rotatably fixing the connecting piece between adjacent turbine blades. The moving blade cover can bear a large centrifuged force and does not constrain the torsions of the moving turbine blades during the rotation of the turbine wheel.
REFERENCES:
patent: 3314652 (1967-04-01), Geberth et al.
patent: 3572968 (1971-03-01), Musick et al.
patent: 3837761 (1974-09-01), Brown
Ikeuchi Kazuo
Imai Tetsu
Hitachi , Ltd.
Powell Jr. Everette A.
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