Shaft current resistance bearing sleeve of electric motor
A bearing seat sleeve and motor technology, applied in the field of bearing seat sleeves, can solve the problems of complex process, high cost, easy deformation, etc., and achieve the effects of convenient production, low cost and prolonging service life
Inactive Publication Date: 2010-06-23
SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
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Problems solved by technology
This method is complicated in process and high in cost. Each factory has different methods, and there is no unified national or industry standard. In addition, the transition sleeve materials are all made of general steel, which is easy to deform.
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[0015] Such as figure 1 As shown, the bearing seat sleeve for preventing axial current of the motor of the present invention includes a metal sleeve 1, the metal sleeve 1 is arranged between the motor bearing and the bearing seat, and the inner ring or outer ring surface of the metal sleeve 1 is sprayed with the first insulating Layer 3, the outer diameter of the metal sleeve 1 sprayed with the first insulating layer 3 matches the inner diameter of the bearing seat, and the inner diameter of the metal sleeve 1 sprayed with the first insulating layer 3 matches the outer diameter of the bearing; the first insulating Layer 3 is formed by spraying insulating powder material onto the surface of the inner or outer ring of the metal sheath 1 by thermal spraying.
[0016] Further, the two sides of the metal sheath 1 are sprayed with the second insulating layer 2 respectively, and the second insulating layer 2 is formed by spraying the insulating powder material on the two sides of the...
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The invention discloses a shaft current resistance bearing sleeve of an electric motor. The bearing sleeve comprises a metal sheath arranged between the bearing and the bearing support of the electric motor, wherein the surface of the inner ring or outer ring of the metal sheath is covered with a first insulating layer through the thermal spraying technology, the outer diameter dimension of the metal sheath covered with the first insulating layer fits with the inner diameter dimension of the bearing support and the inner diameter dimension fits with the outer diameter dimension of the bearing. The bearing sleeve of the invention can be used to effectively prevent the generation of the shaft current of the electric motor, thus prolong the service life of the bearing of the electric motor and ensure the normal operation of the electric motor; and the bearing sleeve has convenient preparation method and low cost and can be used as a standardized and serial bearing fitting.
Description
technical field [0001] The invention relates to a bearing seat cover for preventing shaft current of a motor. Background technique [0002] In theory, the air gap between the stator and the rotor of various motors is balanced and consistent, but due to the constraints of the actual manufacturing process and other factors, there is an unbalanced air gap between the stator and rotor of the actual motor. The shaft current is generated on the rotor shaft, and the shaft current is grounded through the rolling bearing and the machine base, and will cause electric sparks to occur between the rolling body of the rolling bearing and the steel ring during rotation, resulting in electric corrosion, shortening the service life of the rolling bearing, and causing the failure of the motor; In addition, the variable frequency power supply of the variable frequency motor will also generate shaft current, which will cause the occurrence of motor failure. Therefore, overcoming the shaft curr...
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IPC IPC(8): H02K5/16H02K15/14
Inventor 吉志勇李晓庆郑建国刘奕蔡国成
Owner SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD