High-power variable frequency motor insulation bearing sleeve

A frequency conversion motor and insulating bearing technology, which is applied in the direction of casing/cover/support, electrical components, electromechanical devices, etc., can solve the problems affecting the production cycle of motor molding products, the difficulty of manufacturing insulating bearings, and the long supply cycle. , to achieve the effect of simple structure, low cost and guaranteed production cycle

Active Publication Date: 2013-04-03
ZHEJIANG JINLONG ELECTRICAL MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty in manufacturing insulated bearings, the price is expensive, and the delivery cycle is long, which affects the production cycle of motor molding products

Method used

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  • High-power variable frequency motor insulation bearing sleeve

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Embodiment Construction

[0008] The invention relates to an insulating bearing sleeve of a high-power frequency conversion motor, such as figure 1 As shown, it includes motor shaft 1, bearing 2, bearing inner cover 3, bearing outer cover 4, oil deflector ring 5 and retaining ring 6, and an insulating sleeve is set outside the bearing, which is characterized in that the insulating sleeve is included between the bearing 2 and the An inner insulating gasket 7 is arranged between the bearing inner cover 3, an outer insulating gasket 8 is arranged between the bearing 2 and the bearing outer cover 4, and a rear end cover 10 is arranged outside the bearing 2, and between the rear end cover 10 and the bearing seat 9 A gap insulation sheet 11 and a glass fiber insulation layer 12 are provided. By setting the inner insulating gasket 7 between the bearing 2 and the bearing inner cover 3, setting the outer insulating gasket 8 between the bearing 2 and the bearing outer cover 4, and setting the rear end cover 10 o...

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Abstract

A high-power variable frequency motor insulation bearing sleeve comprises a motor shaft, a bearing, a bearing inner cap, a bearing outer cap, an oil baffle ring and a baffle ring, wherein an insulation sleeve is arranged out of the bearing. The high-power variable frequency motor insulation bearing sleeve is characterized in that the insulation sleeve comprises an inner insulation spacer arranged between the bearing and the bearing inner cap, an outer insulation spacer arranged between the bearing and the bearing outer cap, a rear end cap arranged out of the bearing, and a gap insulation strip and a glass fiber insulation layer arranged between the rear end cover and a bearing seat. Three insulation strips are respectively arranged on the left side, the right side and the outer circle of the bearing, can effectively cut off a loop of a motor shaft current, and prevent the motor shaft current from forming a current loop through a motor bearing end cap and a motor base to destroy bearing balls, raceway surface roughness and oil film, and furthermore the bearing is protected. In addition, the insulation strips are simple in structure, convenient to manufacture, low in cost, and convenient to replace, and therefore manufacturing cost of a motor is reduced, and production cycles of motor forming products are guaranteed.

Description

technical field [0001] The invention relates to an insulated bearing sleeve of a high-power variable-frequency motor, which is mainly suitable for 75-1000KW variable-frequency motors. Background technique [0002] The variable frequency motor is powered by a frequency converter, and the power supply voltage contains a large number of high-order harmonics, which are easy to induce a large amount of capacitive coupling current, which causes a large amount of shaft current to be generated in the motor rotor, and the shaft current forms a current through the motor bearing end cover and frame circuit. The current flowing through the bearing will destroy the oil film of the bearing, and the arc will emit pitting on the surface of the ball and raceway, destroying the surface roughness and oil film of the bearing ball and raceway, causing the bearing temperature to rise and burn out. In order to prevent the shaft current from damaging the bearing, the shaft current loop should be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16
Inventor 叶锦武叶叶孙长华
Owner ZHEJIANG JINLONG ELECTRICAL MASCH CO LTD
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