Patent ID: 6027317
Filing Date: 2000-02-22
Classification: F04C

Abstract:
A scroll type machine including a fixed disk (5) comprising a spiral working wall (6) and a mobile disk (7) equally comprising a spiral working wall (8) cooperating with that of the fixed disk, means for driving circular translation movement of the mobile disk, a sealing bellows (15) joined at one end to a member (14) fixed with respect to the circular translation movement of the mobile disk (7) and at its other end to a fixed part (1C) of the machine, said bellows (15) separating the fluid circuit from the mechanical parts driving the mobile disk, characterized in that the fixed disk (5) is joined on the side opposite the mobile disk (7) to a fixed central shaft (10) including a discharge passage (11), said central shaft being surrounded by said bellows (15), the space (16) between said bellows and said fixed central shaft constituting a suction passage, in that a hollow main rotary shaft (19) surrounds said bellows (15) and is carried by at least one bearing (23, 24-32) in a fixed frame (1), one end of said main shaft (19) including an eccentric circular bore (18) cooperating with a drive member (14) joined to the mobile disk (7), said drive means including an electric motor rotor (25) joined to said main rotary shaft (19) and surrounding it and a joined stator (26) surrounding said rotor.