Method for repairing generator shaft abrasion error fast
A repair method and generator technology are applied in the field of size recovery after the surface wear part of a large motor shaft is out of tolerance, it can solve the problems of time-consuming and the shaft of the motor is not easy to disassemble, etc., and achieves low cost, size recovery, and simple process. Effect
Inactive Publication Date: 2009-08-26
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0004] The disassembly of the motor shaft generally requires specialized professionals to operate, and it takes a certain amount of time. Sometimes the shaft of some motors is not easy to disassemble; at the same time, this method requires special spraying equipment and coating heat treatment equipment after spraying, and subsequent mechanical Processing
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[0018] method embodiment
[0019] Two 75KW motors in a subsidiary factory of Northwest Research Institute of Chemical Industry stopped production due to excessive wear of the main shaft. The material of the main shaft is alloy steel, about 1.4 meters long, the diameter to be repaired is 110 mm, and the width is 60±2 mm. It needs to be repaired along the diameter direction of 0.56 mm. In order to solve the above problems, 1) it needs more than 3,000 yuan to return to the factory for overhaul, and the cycle lasts for one month; 2) the method of welding and repainting is adopted, but due to the design of the rotor shaft, it is difficult to disassemble in actual operation on the one hand, and on the other hand There is also unavoidable thermal deformation; 3) It generally takes 7 days to complete the repair by electroplating; and it is necessary to ensure the insulation operation during the electroplating process, otherwise the insulation performance of the motor rotor will be des...
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Abstract
The invention discloses a method for repairing generator shaft abrasion error fast. The surface of the position with abrasion error is polished. Oil stain and dust on the surface are removed. A non-plating surface is shielded. A component to be repaired is connected with a cathode of a power supply, and a plating pen is connected with an anode to carry out electrochemically degreasing. The component to be repaired is connected with the anode, and the plating pen dips activating solution to carry out electrochemically activating operation towards the surface. Then the plating pen is connected with the anode, the component to be repaired is connected with the cathode, and the plating pen dips special nickel solution and working nickel solution sequentially to brush a nickelplated substrate and a working layer on the surface of the component to be repaired. A virtual crystal plating layer raised on the surface of a plating layer is planished, flushed and blew to dryness, and the plating layer is coated with dustproof oil. The method does not require demounting a generator shaft to be repaired, has simple equipment, simple technology and low cost and does not require special equipment, and can be applied to field construction.
Description
technical field [0001] The invention relates to a rapid repair method for failure caused by wear out of tolerance, in particular to a method for restoring the size of the worn part on the surface of a large motor shaft after being out of tolerance. Background technique [0002] The motor shaft will be worn during operation, and the interference fit between the motor stator and the rotor will often fail, and the motor will loosen, causing the motor to work unstable or not work. This phenomenon directly affects production, and if it continues, it will cause equipment damage and pose a threat to personal safety. [0003] For the over-tolerance of the shaft diameter caused by the wear of the motor shaft, there are two commonly used repair methods: one is to directly replace the new shaft of the same type; The part is filled with a layer of metal spraying layer with high hardness and good wear resistance, and then processed to the designed size of the shaft by mechanical process...
Claims
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IPC IPC(8): C25D5/06C25D3/12
Inventor 马宗耀费敬银谢红霞
Owner NORTHWESTERN POLYTECHNICAL UNIV