The components used to assemble motors in motor manufacturers are original motor parts, and the parts replaced due to improper use or wear are called motor parts. The lifespan of general accessories is not as long as that of the original components. Motor accessories can be divided into five parts.
The conduction of the first electricity
The conductive part of electricity includes the stator winding, which can be divided into 2 levels, 4 levels, 6 levels, 8 levels, 2 channels, 4 channels, and 6 channels for larger ones. The rotor winding is the same as the stator, the terminal block series can be divided into y, jzr, and other series, the brush holder series can be divided into AC and DC, the brush rod series can be divided into YZR JZR JS JR YR YRKK Y, the constant voltage spring series is the same as the brush rod series, and the commutator series can be divided into spiral bevel gear commutator, cross commutator, commutator, and DC motor commutator. The junction box series can be divided into YZR. JZR JS JR YR YRKK Y "carbon brush" carbon brush models are divided into TD, MG, J, MK, t, sa, y, etc. "collector ring" collector ring series YR YJR JR ", coil" coil series can be divided into YZR JZR JS JR YR YRKK Y, 》Waiting for components.
Second Electromagnetic
The magnetic part includes the stator core, which can be divided into Y series and Y2 series, and the rotor core, which has the same model as the stator core.
Third heat dissipation
Heat dissipation includes plastic fan blades "Plastic Fan Blade Series YZR JZR Y", aluminum fan blades "Aluminum Fan Blade Model Same as Plastic Fan Blade", and fan covers "Fan Cover Series YZR JZR JS JR YR YRKK Y".
Fourth structural support
The structural support includes the machine base "series can be divided into horizontal and vertical", end caps, "series can be divided into YZR JZR JS JR YR YRKK Y" and "series can be divided into vertical or horizontal", the machine shell "machine shell series YZR JZR JS JR YR YRKK Y", and the bearing cover "series is the same as the machine shell". The bearings include the "Bearing Series includes self-aligning ball bearings and deep groove ball bearings" and the "Bearing Series can be divided into vertical and horizontal". Electric motors are primarily used for power output. The main source of power for a motor is the circulation of electric current.
Fifth bearing and bearing shell
2. Repair and maintenance of motor accessories
edit
The insulation sleeve of the motor accessories is intact without cracks or looseness. The lead connection should be firm, and the insulation resistance value should not be lower than 0.5M Ω at a working temperature of 75 ℃. In terms of the electric brush device, it is required that the lower edge of the brush box be 2-4mm away from the surface of the motor accessory. If the distance is too large, it will cause the electric brush to jump inside the brush box. If it is a hard electric brush, it is likely to break. The electric brush should slide flexibly inside the brush box, and the surface of the inner hole of the brush box should be smooth. The radial dimension tolerance of the inner hole of the brush box is H10, and the axial dimension tolerance is H8. The width and thickness dimension tolerances of the electric brush are d11. The gap between the electric brush and the brush box wall should be between 0.1~0.2mm. If the gap is too large, the electric brush will produce tangential oscillation inside the brush box, which will affect the normal operation of the motor components; The gap is too small, causing the electric card to be stuck in the brush box, resulting in arc light similar to welding burning the surface of the copper ring.
During maintenance, it is necessary to conduct a detailed inspection of the motor components: whether the working surface of the motor components is smooth, and whether there are defects such as burn marks and streaks. The working surface should be smooth and free from rust and oil stains. The external insulation binding of motor accessories should be correct and well sealed. If not handled properly, non-woven glass ribbon impregnated with synthetic resin can be used for binding to prevent mica flakes from scattering during motor operation. The coordination between motor accessories and shafts, as well as the coordination between each ring and insulation sleeve, should be firm. When tapping the copper ring and sleeve copper coordination with a small hammer, there should be a metallic sound.
The contact between the electric brush and the ring should be tight. The pressure difference between each brush should not exceed 20% of its average value. A wound rotor asynchronous motor with a brush lifting device ensures that the electric shock on the short-circuit ring contacts uniformly with the blades on the motor accessories, with a contact area of over 60%, to avoid single-phase operation of the rotor or loss of elasticity due to overheating of the contacts. For minor burn marks, pockmarks, brush marks and other defects on the surface of motor accessories, they can be polished with oilstone and fine file, and finally polished with zero grit sandpaper. In general, motor components should not be easily turned, as turning them once can significantly reduce their lifespan