SOCIETE DE MECANIQUE MAGNETIQUE Patent applications |
Patent application number | Title | Published |
20150275911 | COMPACT TURBOMACHINE WITH MAGNETIC BEARINGS AND AUXILIARY BEARINGS - A turbo-machine for compressing or expanding a fluid comprises a housing ( | 10-01-2015 |
20130099612 | JACKETED ELECTROMAGNETIC MACHINE STATOR FOR USE IN A CORROSIVE ATMOSPHERE WITHOUT HEAT TREATMENT - A jacketed electromagnetic machine stator for a pressurized rotary machine operating in a corrosive atmosphere containing H | 04-25-2013 |
20120286606 | CORROSION-RESISTANT JACKETED ACTIVE MAGNETIC BEARING - In a jacketed active magnetic bearing for a rotary machine having a rotor in contact with a process gas, there is provided a magnetic bearing comprising a bearing armature of laminated magnetic material secured to said rotor, a bearing stator protected by a first jacket of magnetic anti-corrosion material that co-operates with first housing portions to form a first leaktight housing enclosing the bearing stator, the first jacket being made of a ferritic stainless steel, and the first housing portions having insert parts that are also made of ferritic stainless steel, and that are connected by welds to a housing end-wall portion made of a magnetic anti-corrosion material, the laminated magnetic material forming the bearing armature and the detector armature also being a ferritic stainless steel. | 11-15-2012 |
20120263577 | DEVICE FOR DETECTING THE AXIAL POSITION OF A ROTARY SHAFT AND ITS APPLICATION TO A TURBO-MOLECULAR PUMP - A device for detecting the axial position of a rotary shaft of a rotary machine comprises a target of ferromagnetic material placed at the end of the rotary shaft, an induction coil associated with a stationary magnetic circuit and placed facing the target while leaving an airgap, and a power supply circuit. The power supply circuit comprises an AC voltage source connected between a first end of the induction coil and a zone situated at a reference voltage, at least one capacitor connected between the ends of the induction coil, and a detector device interposed between a second end of the induction coil and the zone situated at the reference voltage, in order to deliver on a line information about the magnitude of the current flowing between the second end and the zone situated at the reference voltage. | 10-18-2012 |
20110176910 | Turbomolecular Pump with a Flexible Mount - The flexibly-mounted turbomolecular pump comprises a leaktight casing mounted on a structure via a mechanical damper, a vertical support driven by an electric motor, radial magnetic bearings, an axial magnetic bearing, radial detectors, an axial detector, an emergency mechanical bearing, and a control module comprising power supply circuits and servo-control circuits for the axial and radial magnetic bearings. The servo-control circuits present low stiffness and include filter circuits for defining a limited passband. The control module comprises a comparator unit for detecting abnormally large movements of the rotor from signals delivered by the axial and radial detectors, which movements are greater than predetermined thresholds. The servo-control circuits include a restabilization network and a unit for selectively activating the restabilization network during a predetermined duration after a time at which the crossing of at least one of the predetermined thresholds is detected during a movement of the rotor. | 07-21-2011 |
20110001377 | CANNED OR SLEEVED ROTARY MACHINE AND METHOD OF MANUFACTURING IT - A canned or sleeved rotary machine is equipped with a rotor ( | 01-06-2011 |
20100295395 | OVERMOULDED OR CANNED ELECTRICAL MACHINE - The rotary electric machine comprises at least one piece of electric equipment constituted by an overmolded or jacketed electric motor or by an overmolded or jacketed magnetic suspension system. The electric equipment comprises firstly a rotor ( | 11-25-2010 |
20100187926 | JACKETED AXIAL MAGNETIC BEARING - The invention relates to a jacketed axial magnetic bearing for a rotary machine having a rotor in contact with a gaseous atmosphere that is corrosive, acid, or carrying particles, the bearing comprising a rotor armature in the form of a disk secured to the rotor and placed in the gaseous atmosphere, and a stator magnetic circuit secured to a stationary support device and placed facing the rotor armature, the magnetic circuit of the stator comprising at least one coil and a ferromagnetic body placed in a metallic protective enclosure. The protective enclosure comprises firstly an annular support of channel section with a web and inner and outer flanges presenting a thickness of several millimeters and a length that is less than the length of the stator magnetic circuit, and secondly an annular jacket in the form of a channel-section cover machined from a solid piece and thus without welds, the jacket having inner and outer flanges and a closure web presenting a thickness smaller than the thicknesses of the inner and outer flanges, the free ends of the inner and outer flanges of the jacket being welded to the free ends of the inner and outer flanges of the annular support. | 07-29-2010 |
20100021100 | EMERGENCY ROLLING BEARING THAT IS INSENSITIVE TO AXIAL LOAD - The emergency rolling bearing for a rotary machine having magnetic bearings comprises at least first and second bearing members with radial clearance of value ε | 01-28-2010 |