F - Mech Eng,Light,Heat,Weapons – 03 – B
Patent
F - Mech Eng,Light,Heat,Weapons
03
B
F03B 11/06 (2006.01) F03B 3/02 (2006.01) F04D 29/047 (2006.01)
Patent
CA 2729784
This hydraulic machine comprises a wheel supported by a shaft (5), the wheel and the shaft being able to rotate about a vertical axis (X5) while a radial hydrostatic or hydrodynamic bearing (100) is formed between, on the one hand, a radial peripheral surface (52) of the shaft and, on the other hand, an internal radial surface (102) of a member (101) that is fixed relative to the vertical axis. The bearing (100) extends between two edges (121, 122) which, in normal operation, constitute regions for the removal of a film of water formed in the bearing. At least one cavity (130) is created in the fixed member (101) and opens onto its internal radial surface (102) near a first edge (122) of the bearing. The machine comprises means (131, 132, 133) for placing the cavity (130) in fluidic communication with a volume (V1) situated outside the bearing near the second edge (121) of the bearing (100). That allows some (E2) of the film of water from the bearing (100) to be removed towards the second edge (121) if the bearing becomes obstructed near the first edge (122).
Cette machine hydraulique comprend une roue supportée par un arbre (5), la roue et l'arbre étant mobiles en rotation autour d'un axe vertical (X5), alors qu'un palier hydrostatique ou hydrodynamique radial (100) est formé entre, d'une part, une surface périphérique radiale (52) de l'arbre et, d'autre part, une surface radiale interne (102) d'un organe (101 ) fixe par rapport à l'axe vertical. Le palier (100) s'étend entre deux bords (121, 122) qui constituent, en fonctionnement normal, des zones d'évacuation d'un film d'eau formé dans le palier. Au moins une cavité (130) est ménagée dans l'organe fixe (101 ) et débouche sur sa surface radiale interne (102) au voisinage d'un premier bord (122) du palier. La machine comprend des moyens (131, 132, 133) de mise en communication fluidique de la cavité (130) avec un volume (V1) situé à l'extérieur du palier au voisinage du second bord (121 ) du palier (100). Ceci permet d'évacuer vers le second bord (121 ) une partie (E2) du film d'eau du palier (100) en cas d'obstruction du palier au voisinage du premier bord (122).
Bertea Jean-Francois
Vuillerod Gerard
Alstom Hydro France
Benoit & Cote Associes Inc.
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