Method of manufacturing impeller
AssigneeEbara Corporation
InventorsEsao Yamada, Kentaro Orita, Takashi Yamakawa
Life of this patent
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Abstract
A method of manufacturing an impeller, the method including: a step of forming a cover that is provided with a plurality of blades; a step of disposing a core on the cover such that the core is interposed between the blades; a step of disposing a hub on the blades, the hub being a plate on which grooves conforming to shapes of the blades are formed; and a step of welding the hub and the blades, wherein through-holes conforming to the shapes of the blades are provided on the core, such that the blades are fitted in the core when the core is disposed.
Claims16
A method of manufacturing an impeller, the method comprising:
- a step of forming a cover that is provided with a plurality of blades;
- a step of disposing a core on the cover such that the core is interposed between the blades;
- a step of disposing a hub on the blades, the hub being a plate on which grooves conforming to shapes of the blades are formed;
- and
- a step of welding the hub and the blades, wherein
- through-holes conforming to the shapes of the blades are provided on the core, such that the blades are fitted in the core when the core is disposed,
- a vent hole is provided on the core, and
- the method further comprises a step of affixing a tape over a gap between the hub and the core and filling an inert gas from the vent hole into a space among the hub, the cover and the core, before the step of welding the hub and the blades.
A method of manufacturing an impeller, the method comprising:
- a step of forming a hub that is provided with a plurality of blades;
- a step of disposing a plurality of divided cores on the hub, such that each of the divided cores is disposed at each interspace of adjacent blades;
- a step of disposing a cover on the hub and the divided cores;
- and
- a step of welding the cover and the blades,
- wherein:
- a hollow space is formed at a center of the hub,
- the divided cores protrude to an inner circumference side of the hub, and
- the method comprises a step of providing inner circumference spacers at interspaces of adjacent divided cores on the inner circumference side, in the step of disposing the divided cores.
A method of manufacturing an impeller, the method comprising:
- a step of forming a hub that is provided with a plurality of blades;
- a step of disposing a plurality of divided cores on the hub, such that each of the divided cores is disposed at each interspace of adjacent blades;
- a step of disposing a cover on the hub and divided plates;
- and
- a step of welding the cover and the blades,
- a hollow space is formed at a center of the hub,
- the method further comprises a step of mounting a centering fixture in the hollow space formed in the hub, after the step of forming the hub and before the divided cores are disposed, and
- in the step of disposing the divided cores, the divided cores are disposed such that back surfaces of inner circumference sides of the divided cores contact with a front surface of the centering fixture.
A method of manufacturing an impeller, the method comprising:
- a step of forming a hub that is provided with a plurality of blades;
- a step of disposing a plurality of divided cores on the hub, such that each of the divided cores is disposed at each interspace of adjacent blades;
- a step of disposing a cover on the hub and the divided cores;
- and
- a step of welding the cover and the blades,
- the method further comprising a step of respectively disposing outer circumference spacers at interspaces of the adjacent blades on outer circumference sides of the divided cores, in the step of disposing the divided cores,
- wherein in the step of welding the cover and the blades, an inert gas is supplied from an inner circumference side, such that the inert gas flows through a passage that is formed between the hub and the cover.
A method of manufacturing an impeller, the method comprising:
- a step of forming a hub that is provided with a plurality of blades;
- a step of disposing a plurality of divided cores on the hub, such that each of the divided cores is disposed at each interspace of adjacent blades;
- a step of disposing a cover on the hub and the divided cores;
- and
- a step of welding the cover and the blades,
- wherein the plurality of blades are provided from a center of the hub at an equal angular interval, and shapes of the blades are the same as each other, and
- shapes of the divided cores are the same as each other.
Dependencies are inferred from the claim text.