RADIAL-AXIAL HYDRAULIC MACHINE Russian patent published in 2012 - IPC F03B3/02 

FIELD: machine building.

SUBSTANCE: hydraulic machine comprises an inner and an outer separating circular hydrodynamic seals 8 and 9, arranged into each or one of cavities around an impeller 2 - between the impeller 2 and a cover 5 and between the impeller 2 and a foundation ring 6. The outer separating seal 8 is located in the area of the peripheral zone of the impeller 2, and the inner one 9 - between the outer separating seal 8 and a seal 7, which limits leaks into a suction pipe. Two rings 10 and 11, which form the inner separating seal 9, have a Z-shaped or an angular profile in the cross section and are installed so that free shelves of their cross sections cover each other. Each cavity, where separating seals 8 and 9 are installed, is separated into two chambers 12 and 14. The external chamber 14 is equipped with an input 17 for compressed gas supply.

EFFECT: invention provides for squeezing out water from the peripheral zone of the impeller during operation of the hydraulic machine in the turbine or pump mode and reduction of energy losses for disc friction.

1 dwg