Turbine wheel and pelton turbine equipped with same
AssigneeALSTOM Power Hydro
InventorsGeorges Rossi, Louis Finet, Jean-Marie Roman
Life of this patent
Estimating the term…
Abstract
The invention concerns a Pelton turbine wheel comprising a rim (1) and several buckets (2) distributed at the rim periphery, characterised in that it comprises at least a ring-shaped flange (5, 6) integral with the rim and provided with housings (7) for receiving the buckets. The flange is capable of absorbing at least part of the efforts transmitted by the buckets (2) to the rim (1) and forms a peripheral strip (9) at external radial zones of the housings (7). The transmission of the efforts from the buckets (2) to the wheel rim (2) is carried out without generating too considerable a concentration zone of mechanical stresses.
Claims10
In a turbine wheel of the Pelton type, including a wheel rim and a plurality of buckets spaced about a periphery of the rim, the improvement comprising;
- at least one annular disk in the form of a continuous ring secured to the rim so as to extend radially outwardly with respect to the rim, said at least one annular disk having a plurality of spaced openings provided within an outer portion thereof spaced inwardly of an outer peripheral edge and radially outwardly of the rim for receiving the plurality of buckets, said at least one annular disk extending radially outwardly relative to said plurality of buckets such that said plurality of buckets are positioned within said spaced openings so that forces directed thereto are transmitted along a full length of each of said plurality of buckets to said at least one annular disk such that said at least one annular disk is adapted to absorb and transmit forces on said plurality of buckets to said rim, and said length being taken along a plane of said at least one annular disk;
- wherein said outer peripheral edge of said at least one annular disk forms a continuous annular portion of said at least one annular disk.
A Pelton-type turbine comprising a turbine wheel including a wheel rim, and a plurality of buckets spaced about the periphery of said rim at least one annular disk in the form of a continuous ring secured to the rim and having a plurality of spaced openings provided within an outer portion thereof spaced inwardly of an outer peripheral edge for receiving the plurality of buckets, said at least one annular disk extending radially outwardly relative to said plurality of buckets such that said plurality of buckets are positioned within said spaced openings so that forces directed thereto are transmitted along a full length of said plurality of buckets to said at least one annular disk and such that said at least one annular disk is adapted to absorb and transmit forces on said plurality of buckets to the rim, and said length being taken along a plane of said at least one annular disk;
- wherein said outer peripheral edge of said at least one annular disk forms a continuous annular portion of said at least one annular disk.
Dependencies are inferred from the claim text.