DEVICE OF AIR INLET TO FLOW-THROUGH PART OF HYDRAULIC TURBINE Russian patent published in 2010 - IPC F03B11/00 

FIELD: machine building.

SUBSTANCE: air inlet device includes housing 1 and valve including seat 3 and shutoff member 4. Housing 1 has inner 9 and outer 8 walls of cylindrical shape, equipped with bottom 10 located between walls and separating the space between walls of housing 1 from flow-through part of hydraulic turbine. At bottom 10 there are through holes 12 the total area of which is less by 2-6 times than the passage area of valve in full opening position. In cavity of housing 1, which is restricted with its inner 9 wall, coaxially to walls of housing 1 there installed is hollow cylinder 14. Shutoff member 4 is equipped with piston 7 arranged in inner cavity of cylinder 14. Cavity 19 of cylinder 14, which is located under piston 7, is connected to flow-through part of hydraulic turbine, and cavity 20 above piston 7 is connected to atmospheric air.

EFFECT: reducing noise level during the operation of air inlet device at simultaneous increase of the device operating stability.

3 cl, 2 dwg