초록 ▼

A modular motor and magnetic bearing assembly comprising a positioning casing having a plane reference surface, an outer cylindrical reference surface, a central portion provided on an outer face with cooling liquid flow channels, and intermediate portions provided with openings for gaseous fluid en

A modular motor and magnetic bearing assembly comprising a positioning casing having a plane reference surface, an outer cylindrical reference surface, a central portion provided on an outer face with cooling liquid flow channels, and intermediate portions provided with openings for gaseous fluid entry and exit; a rotor presenting an inner cylindrical reference surface and a plane reference surface; an electric motor; radial magnetic bearings; an axial abutment; and auxiliary mechanical bearings. The modular assembly can then be incorporated in a main casing simply by sliding and it can be connected directly to a functional unit without reworking adjustments of the magnetic bearings.

대표청구항 ▼

1. A modular motor and magnetic bearing assembly comprising: a positioning casing comprising a first end portion presenting a plane reference surface perpendicular to a longitudinal axis X-X′, a second end portion forming the support of an axial magnetic abutment, a cylindrical wall presenting a fir

1. A modular motor and magnetic bearing assembly comprising: a positioning casing comprising a first end portion presenting a plane reference surface perpendicular to a longitudinal axis X-X′, a second end portion forming the support of an axial magnetic abutment, a cylindrical wall presenting a first end having an outer cylindrical reference surface, a second end secured to the second end portion, a central portion provided on an outer face with channels for a flow of cooling liquid, a first intermediate portion provided with openings for entry of gaseous fluid, and a second intermediate portion provided with openings for exit of gaseous fluid;a rotor having the longitudinal axis X-X′ as its axis and presenting a first end provided with an inner cylindrical reference surface and a plane reference surface perpendicular to the longitudinal axis X-X′;an electric motor comprising a stator mounted on an inner face of the central portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor;a first radial magnetic bearing comprising a stator mounted on an inner face of the first intermediate portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor;a second radial magnetic bearing comprising a stator mounted on an inner face of the second intermediate portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor;an axial abutment comprising a rotor armature mounted at the second end of the rotor perpendicularly to the longitudinal axis X-X′ and two stator subassemblies mounted on the axial abutment support;a first auxiliary mechanical bearing arranged between the first end portion of the positioning casing and the first end of the rotor; anda second auxiliary mechanical bearing arranged between the second end portion of the positioning casing and the second end of the rotor,wherein the plane reference surface and the outer cylindrical reference surface are matched to a main casing of a rotary machine based on relative positioning to reduce manufacturing adjustments. 2. The modular assembly according to claim 1, further comprising first and second position detectors for detecting the axial and radial positions of the rotor relative to the positioning casing, which position detectors are arranged respectively in the vicinity of the first radial magnetic bearing and in the vicinity of the second radial magnetic bearing. 3. The modular assembly according to claim 1, wherein the central portion of the cylindrical wall of the positioning casing further comprises gasket housings at first and second ends of its outer face with the cooling liquid flow channels between them. 4. A rotary machine, comprising: a modular motor and magnetic bearing assembly including: a positioning casing comprising a first end portion presenting a plane reference surface perpendicular to a longitudinal axis X-X′, a second end portion forming the support of an axial magnetic abutment, a cylindrical wall presenting a first end having an outer cylindrical reference surface, a second end secured to the second end portion, a central portion provided on an outer face with channels for a flow of cooling liquid, a first intermediate portion provided with openings for entry of gaseous fluid, and a second intermediate portion provided with openings for exit of gaseous fluid,a rotor having the longitudinal axis X-X′ as its axis and presenting a first end provided with an inner cylindrical reference surface and a plane reference surface perpendicular to the longitudinal axis X-X′,an electric motor comprising a stator mounted on an inner face of the central portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor,a first radial magnetic bearing comprising a stator mounted on an inner face of the first intermediate portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor,a second radial magnetic bearing comprising a stator mounted on an inner face of the second intermediate portion of the cylindrical wall of the positioning casing and an armature mounted on an outer surface of the rotor,an axial abutment comprising a rotor armature mounted at the second end of the rotor perpendicularly to the longitudinal axis X-X′ and two stator subassemblies mounted on the axial abutment support,a first auxiliary mechanical bearing arranged between the first end portion of the positioning casing and the first end of the rotor, anda second auxiliary mechanical bearing arranged between the second end portion of the positioning casing and the second end of the rotor;a main casing comprising a cylindrical wall presenting an inner surface with a portion co-operating with the outer cylindrical reference surface, and a first plane end face that co-operates with the plane reference surface of the first end portion; anda functional unit comprising a secondary casing with an end portion also coming into abutment against the first plane end face of the main casing, and a functional member connected to the first end of the rotor and positioned relative to the inner cylindrical reference surface and to the plane reference surface of the rotor,wherein the plane reference surface and the outer cylindrical reference surface are matched to the main casing of the rotary machine based on relative positioning to reduce manufacturing adjustments. 5. A rotary machine according to claim 4, wherein the main casing includes: an opening for entry of gaseous cooling fluid, the opening being situated facing one of the gaseous fluid entry openings situated in the first intermediate portion,an opening for exit of gaseous cooling fluid situated facing one of the gaseous fluid exit openings situated in the second intermediate portion, anda cooling liquid inlet and a cooling liquid outlet leading into the cooling liquid flow channels. 6. A rotary machine according to claim 4, the main casing further comprising a leaktight closing end wall situated outside the axial magnetic abutment. 7. A rotary machine according to claim 4, the main casing further comprising a cylindrical wall having a thickness that defines an additional plane reference surface perpendicular to the longitudinal axis X-X′ outside the axial magnetic abutment. 8. A rotary machine according to claim 7, further comprising a second functional unit including: a secondary casing with an end portion coming into abutment against the additional plane reference surface of the main casing, anda functional member connected to the second end of the rotor and positioned relative to a second inner cylindrical reference surface and to a second plane reference surface of the rotor situated beside the axial magnetic abutment. 9. A rotary machine according to claim 4, wherein the rotary machine constitutes one of a centrifugal compressor or a turbogenerator unit.