US 12,215,706 B2
Rotary machine and primary motor-pump assembly provided with this rotary machine
Julien Freychet, Rillieux la Pape (FR); Mohand Adjemout, Lucé (FR); Pascal Andre, Sablons sur Huisne (FR); Mohamed-Amine Hassini, Bourg la Reine (FR); and Benoit De Laage De Meux, Villejuif (FR)
Assigned to Electricite de France, (FR)
Appl. No. 18/563,220
Filed by Electricite de France, Paris (FR)
PCT Filed May 11, 2022, PCT No. PCT/EP2022/062725
§ 371(c)(1), (2) Date Nov. 21, 2023,
PCT Pub. No. WO2022/248220, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 2105496 (FR), filed on May 27, 2021.
Prior Publication US 2024/0229813 A1, Jul. 11, 2024
Int. Cl. F04D 29/06 (2006.01); F04D 7/08 (2006.01); F04D 29/10 (2006.01); G21C 15/243 (2006.01)
CPC F04D 29/061 (2013.01) [F04D 7/08 (2013.01); F04D 29/106 (2013.01); G21C 15/243 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A rotary machine, comprising a casing, at least one rotary shaft rotary along a prescribed direction of rotation, at least one guide bearing, which is mounted in the casing and in which the at least one rotary shaft is rotatably mounted,
the casing delimiting a compartment configured to contain a volume of air and a volume of lubrication oil to lubricate the at least one guide bearing,
the rotary machine comprising a rotary part, fixed in rotation to the at least one rotary shaft and surrounded by an upper part of the casing transversally to the at least one rotary shaft and distant from the at least one guide bearing, an oil-sealing device, located between the at least one rotary part and the upper part of the casing, and a device for filtering the air of the compartment and discharging the air to the outside of the compartment,
wherein the oil-sealing device comprises at least one outside air suction grooving in the prescribed direction of rotation of the at least one rotary shaft,
the at least one outside air suction grooving being located in the rotary part and/or in the upper part of the casing,
the rotary part having no contact with the upper part of the casing,
the at least one outside air suction grooving extending from an air suction upstream end, of the rotary part and/or of the upper part of the casing, to an air ejection downstream end, of the rotary part and/or of the upper part of the casing,
the air suction upstream end being located on a side of an air communication opening of the rotary machine with the outside and the air ejection downstream end being in communication with the compartment,
the at least one outside air suction grooving being configured to suction air from the air suction upstream end to the air ejection downstream end toward the compartment when the at least one rotary shaft rotates in the prescribed direction of rotation.