Patent ID: 6927517
Filing Date: 2005-08-09
Classification: F16C

Abstract:
1. A rotary machine comprising a rotary shaft ( 2 ) supported by first and second radial magnetic bearings ( 5 , 6 ) that are electrically controlled by a control device ( 13 ), said rotary shaft being fitted with an axial abutment device ( 100 ) comprising a rotor formed by a disk ( 101 ) secured to the rotary shaft ( 2 ) and interposed between first and second stators ( 102 , 104 ) formed annularly around the rotary shaft and each including at least one annular coil ( 103 ; 105 ) controlled electrically by a system for servo-controlling the axial position of the rotary shaft, characterized in that one of the two stators of the axial abutment device ( 100 ) further comprises a secondary induction circuit ( 106 ), and in that the disk ( 101 ) secured to the rotary shaft includes a primary induction circuit ( 107 ) so that during rotation of the shaft, electricity is excited in the secondary induction circuit so as to deliver energy to the radial magnetic bearings.