| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic bearing usable with corrosion resistance in an oil and gas environment. <P>SOLUTION: This jacketed active magnetic bearing for a rotating machine includes a bearing armature 31 made of a thin layer magnetic material and fitted to a rotor in contact with process gas, and a bearing stator 41 of an electromagnetic coil 42 wound around a yoke 43 made of a thin layer magnetic material. The bearing stator is protected by a first jacket 34 made of ferritic stainless steel which is a magnetic corrosion-resistant material cooperating with a first housing portion to form a first leaktight housing 40. The first housing portion is made of ferritic stainless steel and has insertion parts 38A, 38B connected to a housing end wall portion 44 made of the magnetic corrosion-resistant material, by weld parts 36A, 36B and 37A, 37B before the electromagnetic coil and the yoke of the bearing stator are placed in suitable parts. The thin layer magnetic material for the bearing armature and a detector armature is ferritic stainless steel. <P>COPYRIGHT: (C)2013,JPO&INPIT |
