Bearing-replaceable motor structure and replacement method of motor bearings

Abstract

The invention relates to a bearing-replaceable motor structure and a replacement method of motor bearings. A spindle (6) of the bearing-replaceable motor structure is divided into a middle shaft section (602) and two shaft extension sections (601 and 603) which are positioned on two sides of the middle shaft section (602). Small detachable end covers (71) are respectively arranged in the middles of end covers on two sides of a motor. Bearings (51) are arranged between the shaft extension section (601) and center holes of the small end covers (71). A bearing end assembly part is formed by the small end covers (71), the shaft extension section (601), the bearings (51) and bearing sealing accessories (811 and 812). When the bearings (51) need replacing, users firstly fix a rotor (4), remove bolt connection between the shaft extension section (601) and the middle shaft section (602) and bolt connection between the small end covers (71) and the end covers (11) of the motor, integrally detach the bearing end assembly part along the axial direction of the motor, install a new bearing end assembly part in place along the axial direction of the motor, recover the bolt connection between the shaft extension section (601) and the middle shaft section (602) and the bolt connection between the small end covers (71) and the end covers (11) of the motor, and remove the fixation of the rotor (4).

Description

technical field [0001] The invention relates to a motor structure with replaceable bearings and a method for replacing the motor bearings. Background technique [0002] Conventional inner rotor motors are mainly composed of a machine base, a stator on the inner wall of the machine base, end covers on both sides of the machine base, a main shaft, a rotor installed on the main shaft, and bearings. The bearings are installed between the end cover and the main shaft to fix The role of supporting the spindle. The proportion of bearing in the total cost of the motor is very small, but it is an important part of the motor. Its operating performance will directly affect the life of the motor. For some special-purpose motors, such as wind turbines installed in high altitude, the motor's The cost of disassembly and assembly is far greater than the price of the bearing, so the development of a motor structure with replaceable bearings has practical engineering significance and economi...

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Problems solved by technology

[0005] Chinese patent 200510046344.7 proposes a method for replacing joint bearings in aero-engine components. Chinese patent 201110123957.1 proposes a simple replacement method for megawatt wind turbine bearings. Chinese patent 201110338054.5 proposes a method for replacing bearings. The application number is 200980126460.6 The patent proposes a wind turbine including a main bearing and a method for replacing the main bearing. The design of replaceable bearings in the above patents and documents is still limited to the method and process of replacing the bearing body at the installation site of mechanical equipment. The most important The shortcoming is that it does not consider the various difficulties encountered in the replacement of bearings on site and the evaluation of the installation quality and operation effect of the newly installed bearings.

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