公开(公告)号：US20220145886A1

公开(公告)日：2022-05-12

申请号：US17439018

申请日：2019-03-14

Applicant: ATELIERS BUSCH SA

Inventor： Théodore Iltchev ,  Stéphane Varrin ,  Didier Müller

IPC: F04C18/16

Abstract: A dry pump for gases comprises a first rotor (1) comprising a first lobe portion (1A) and a first screw (16), as well as a second rotor (2) comprising a second lobe portion (2A) and a second screw (2B). A casing delimits an internal volume in which are located together the first and second screws (1B, 2B) and the first and second lobe portions (1A, 2A). Each of the first and second screws (1B, 2B) comprises a threading invariable along its length. The first and second rotors (1, 2) turn in opposite directions and are located in successive configurations. In a first configuration of the rotors, the first and second lobe portions (1A, 2A), a portion of the first screw (16), a portion of the second screw (2B) and the casing together delimit a chamber (30) which is closed. In a second configuration of the rotors, the chamber (30) has a smaller capacity than in the first configuration. In a third configuration of the rotors, the chamber (30) is displaced entirely at the first and second screws (1B, 2B) and isolated from the lobe portions.

公开(公告)号：US11920592B2

公开(公告)日：2024-03-05

申请号：US17439018

申请日：2019-03-14

Applicant: ATELIERS BUSCH SA

Inventor： Théodore Iltchev ,  Stéphane Varrin ,  Didier Müller

IPC: F04C23/00 ,  F04C18/08 ,  F04C18/12 ,  F04C18/16 ,  F04C25/02

CPC classification number: F04C23/005 ,  F04C18/084 ,  F04C18/126 ,  F04C18/16 ,  F04C25/02 ,  F04C2220/12 ,  F04C2240/20 ,  F04C2240/30 ,  F04C2250/20

Abstract: A dry pump for gases comprises a first rotor (1) comprising a first lobe portion (1A) and a first screw (1B), as well as a second rotor (2) comprising a second lobe portion (2A) and a second screw (2B). A casing delimits an internal volume in which are located together the first and second screws (1B, 2B) and the first and second lobe portions (1A, 2A). Each of the first and second screws (1B, 2B) comprises a threading invariable along its length. The first and second rotors (1, 2) turn in opposite directions and are located in successive configurations. In a first configuration of the rotors, the first and second lobe portions (1A, 2A), a portion of the first screw (1B), a portion of the second screw (2B) and the casing together delimit a chamber (30) which is closed. In a second configuration of the rotors, the chamber (30) has a smaller capacity than in the first configuration. In a third configuration of the rotors, the chamber (30) is displaced entirely at the first and second screws (1B, 2B) and isolated from the lobe portions.

公开(公告)号：US12116895B2

公开(公告)日：2024-10-15

申请号：US17424513

申请日：2019-02-06

Applicant: ATELIERS BUSCH SA

Inventor： Théodore Iltchev ,  Sergio Dessi ,  Stéphane Varrin

IPC: F04C18/12 ,  F01C21/10 ,  F04C18/14 ,  F04C23/00 ,  F04C29/04 ,  F04C29/12

CPC classification number: F01C21/10 ,  F04C18/123 ,  F04C18/126 ,  F04C18/14 ,  F04C23/001 ,  F04C29/04 ,  F04C29/12 ,  F05B2210/12

Abstract: A multistage pump body comprises a first pumping chamber (20) and a second pumping chamber (21). A connecting duct (26a) puts an outlet (27) of the first pumping chamber (20) into communication with an inlet (28) of the second pumping chamber (21). A leak-tight conduit (40) is provided for the circulation of a cooling liquid. The connecting duct (26a) is a lateral duct of the multistage pump body. A heat-conducting wall (33) partially delimits the connecting duct (26a) and has an external surface (34) on the outside. At least a portion of the connecting duct (26a) passes between this external surface (34) of the heat-conducting wall (33) and the leak-tight conduit (40).

公开(公告)号：US20220127962A1

公开(公告)日：2022-04-28

申请号：US17424513

申请日：2019-02-06

Applicant: ATELIERS BUSCH SA

Inventor： Théodore Iltchev ,  Sergio Dessi ,  Stéphane Varrin

IPC: F01C21/10 ,  F04C18/12 ,  F04C18/14 ,  F04C23/00 ,  F04C29/04 ,  F04C29/12

Abstract: A multistage pump body comprises a first pumping chamber (20) and a second pumping chamber (21). A connecting duct (26a) puts an outlet (27) of the first pumping chamber (20) into communication with an inlet (28) of the second pumping chamber (21). A leak-tight conduit (40) is provided for the circulation of a cooling liquid. The connecting duct (26a) is a lateral duct of the multistage pump body. A heat-conducting wall (33) partially delimits the connecting duct (26a) and has an external surface (34) on the outside. At least a portion of the connecting duct (26a) passes between this external surface (34) of the heat-conducting wall (33) and the leak-tight conduit (40).