Sealing system for a hydraulic machine
AssigneeKvaerner Turbin Aktiebolag
InventorConny Thyberg
Life of this patent
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Abstract
A Kaplan turbine or similar hydraulic machine has a hub body (1) fixed to the turbine shaft with radial blades attached to the hub body. The blades are fitted with oil lubricated bearings in the hub body. A sealing arrangement for the oil system has first (60) and second (61) circumferential sealing members with a circumferential space (65) between the first and second sealing members (60, 61). High pressure water from a water source is directed into the circumferential space (65) via a connecting channel (64) to block the lubricating oil from leaking into the working fluid.
Claims6
A Sealing system for the of hydraulic machine which comprises a runner or rotor with a hub body (1) and vanes or blades (4) which are rotatably journalled in oil lubricated bearings (7, 8) in the hub body, said sealing system comprising sealing means located between said bearings and surrounding water, characterized in that said sealing means comprise a circumferential first sealing member (60) and a second circumferential sealing member (61) inside of said first sealing member, that a circumferential space (65) exists between said first and second sealing members, and that the circumferential space is connected via a channel (64) with water which has a pressure that is greater than the oil pressure in said bearings.
Dependencies are inferred from the claim text.