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Motor housing repair. It can be manufactured by CNC engraving, sand casting, transparent acrylic(PMMA/PC) 3D Printing.
The insulation sleeve of the motor accessories is complete without cracks and looseness. The lead connection should be firm, and the insulation resistance value should not be lower than 0.5MΩ when the working temperature is 75 ° C. In the brush device, the lower edge of the brush box is required to be 2~4mm apart from the surface of the motor accessories, which will cause the brush to beat in the brush box, if it is a hard brush, it is likely to break. The brush should slide flexibly in the brush box, the surface of the inner hole of the brush box is smooth, and the dimensional tolerance of the aperture in the brush box is H10 and the axial dimensional tolerance is H8. Brush width and thickness dimension tolerance d11. The gap between the brush and the brush box wall should be 0.1-0.2mm, the gap is too large, and the brush will swing tangentially in the brush box, affecting the normal operation of the motor accessories; The gap is too small, so that the electric brush stuck in the brush box, causing arc burn similar to electric welding copper ring surface.
During maintenance, the motor accessories should be carefully inspected: the working surface of the motor accessories is smooth, and there are no burn marks, streaks and other defects. The working surface is required to be smooth and free from rust and grease. Electrical parts insulation external binding should be correct, coated well. If it is not well handled, weft less glass ribbon impregnated with synthetic resin can be used to bind to prevent the mica sheet from flying when the motor is running. Motor accessories and shaft coordination and the coordination of each ring and insulation sleeve should be firm, with a small hammer tap copper ring and sleeve copper coordination, there should be metal sound.
Brush and ring contact should be tight. The pressure difference between brushes should not exceed 20% of its average value. For the winding rotor asynchronous motor with brush lifting device, the electric shock on the short circuit ring is in uniform contact with the blade on the motor accessories, and the contact area is more than 60%, so as to avoid single-phase operation of the rotor or overheating of the contact. For the motor accessories surface slight burn marks, pitting, brush marks and other defects, you can use a stone, fine file grinding, and finally with zero zero emery cloth polishing. Under normal circumstances, motor parts should not be easily turned, because turning once will reduce the life of a lot.
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3D CNC Milling Prototype ,
CNC Machining,
Automobile Prototypes parts,
Construction Machinery Prototype Parts,
Medical Device Prototype Parts,
Sand Casting
