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1 378 492

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A1

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(21) (22)

Application

4066485/06, 1986-02-10

(22)

Actual filing date

1986-02-10

(45)

Published

1994-04-15

(72)

Inventor

Begicheva V.S.Liukonen Ju.N.Sotnikov A.A.Pylev I.M.Babanov O.S.Bryzgalov V.I.Voroshilov V.P.Moroz A.Ja.Bukchin S.M.

RADIAL-AXIAL HYDRAULIC MACHINE IMPELLER Russian patent published in 1994 - IPC

Abstract SU 1378492 A1

FIELD: hydraulic machinery engineering. SUBSTANCE: twin fins 4 and 5 are mounted on rear side of each blade 3 along boundaries of section of erosion zone at maximum depth of breakdown. Pitch between pairs of fins and their height are determined respectively from relationships Lp = (0.04-0.0451), hf = (0.002-0.003) D1, where D1 is diameter of impeller. Fins increase the thickness of boundary layer, as a result, cavities close not on surface of blades but at some distance from them. EFFECT: reduced intensification of cavitation erosion of impeller. 3 dwg

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SU 1 378 492 A1

Authors

Begicheva V.S.

Liukonen Ju.N.

Sotnikov A.A.

Pylev I.M.

Babanov O.S.

Bryzgalov V.I.

Voroshilov V.P.

Moroz A.Ja.

Bukchin S.M.

Dates

1994-04-15—Published

1986-02-10—Filed

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