How is the motor rotor shaft more suitable for on-site maintenance?
Three and recommend motor rotor shaft wear reasons:
There are many reasons for the wear of the motor rotor shaft. The main forms of wear are adhesive wear, abrasive wear, fatigue wear, fretting wear, etc., with poor impact resistance and poor fatigue resistance, which is easy to cause wear of bearing position and bearing chamber.
Common repair method of rotor shaft wear:
At present, the common methods to repair the wear of the motor rotor shaft in China are bushing, pitting, surfacing welding, electric brush plating, thermal spraying, laser cladding, etc. The appearance of these data repair processes is limited by the complicated process design conditions and on-site working environment while we promote the research, improvement and development of the enterprise technology production process, especially in the face of students in some countries, such as emergency, large number of equipment, complex disassembly and other equipment management problems, these traditional processes are obviously more than enough. The method of setting shaft sleeves and pitting is a very old shaft repair method with poor repair effect. At present, it is rarely used in China. Now several other repair methods need to be briefly analyzed:
1. Surfacing (repair welding) process
The weld is welded to the edge of the workpiece with a wear-resistant surface or metal layer, corrosion resistance, heat resistance and other properties of the welding process. Different workpieces and welding electrodes are used for different welding processes in order to obtain satisfactory surfacing effect. The most commonly encountered problem in surfacing is cracking. Usually after welding (welding) requires heat treatment, and mechanical processing. The biggest disadvantage of welding is the thermal stress concentration, large heat affected zone, it is likely that the cause of the shaft deformation.
2. Thermal spraying process
Thermal spraying is the molten state of the spray material, through the economic high-speed airflow to make its atomization spray on the surface of the parts, the formation of a spray coating with a metal surface information processing method. Thermal spraying requires our professional spraying tools. The main disadvantage of thermal spraying is that the joint work strength between the spraying layer and the base metal enterprises is not developed enough, the spraying layer has defects such as pores, and is not easy to machine.
3. Brush plating process
Brush plating is a process of obtaining a coating on the surface of a workpiece by electrolysis. Its advantage is to achieve online repair, its shortcomings are very obvious. The brush plating process is limited by the amount of wear, and the thickness of the brush plating is generally less0.2mm. When the wear is greater than 0.2mm, the brush plating efficiency will decrease exponentially. When the brush plating is too thick, the brush plating is easy to fall off and the service life is short.
4. Laser cladding process
Laser cladding, also known as laser cladding or laser cladding, is a new type of surface modification technology. By adding cladding materials on the surface of the substrate, a thin layer of high energy density laser beam is remelted on the surface of the substrate to form a metallurgical cladding layer on the surface of the substrate. The advantage of laser cladding is that the heating of the substrate is not affected by the metal substrate, and the cooling rate of the deposited metal is fast. The disadvantage is that the construction period is long, the cost is expensive, the coating is still a combination of electric melting pool, the internal stress is large, easy to deform, there is the possibility of cracks.
Based on the above, the wear of the motor shaft is repaired by using new technology.-Carbon Nano appears in Sorrene polymer materials, changing the pattern of traditional repair techniques.
Rotor shaft, rotating shaft
Other Content
2024-01-02
Can meet your needs of a variety of materials!
WeChat Public Number
Address:
Foreign companies
Established：April 20, 1994