Ventilated channel board of motor rotor

Abstract

This invention discloses a ventilated channel board of a motor rotor; the lengths of ventilated channel sheets are basically equal to the annular width of a ventilated channel bottom board; the ventilated channel sheets are installed and welded with the ventilated channel bottom board of a rotor in an orthogonal manner; according to the ventilated channel board disclosed by this invention, after the ventilated channel sheets are lengthened, a welding area is enlarged, thus, connection between the ventilated channel sheets and the ventilated channel bottom board is more stable so as to effectively prevent a problem that an inner hole of an armature ventilated channel board is deformed so as to cause potential safety hazard such as a popped armature teeth part, a flied-off ventilated channel sheet and the like; the long-time running of a motor is ensured reliably; the ventilated channel sheets which have equal heights are evenly distributed on a rotor ventilated channel board in a welding manner; and armature pressing rings are pressed on the ventilated channel sheets with the same heights so as to effectively avoid the armature teeth part being popped. According to the ventilated channel board disclosed by this invention, the running safety of the ventilated channel board is enhanced, raw material is saved, armature teeth are prevented from being popped, the strength of the armature ventilated channel board is enhanced, and the safe/reliable long-time running of the motor is ensured.

Description

technical field [0001] The invention relates to the technical field of direct current motors, in particular to ventilation slot plates for motor rotors. Background technique [0002] The armature of a DC motor is a rotating part used to achieve electromechanical energy conversion. It is mainly composed of shafts, armature cores, armature brackets, armature windings, commutators and fans. The armature core is an integral part of the magnetic circuit of the motor, and it is also the support of the armature winding; the armature core is pressed and fixed by the armature ring at both ends, and the armature ring is pressed on the ventilation groove plate, and the ventilation groove The flatness of the plate determines the firmness and reliability of the armature pressure ring and the ventilation slot plate. The ventilation slots in the existing structure of the ventilation slots are very short, and a ring is welded close to the inner diameter of the ventilation slots. The height...

AI Technical Summary

Problems solved by technology

The ventilation slots in the existing structure of the ventilation slots are very short, and a ring is welded close to the inner diameter of the ventilation slots. The height of the ring is theoretically equal to the height of the ventilation slots. However, the heights of the two separate materials cannot be guaranteed to be absolutely consistent.

If the height of the ring is slightly higher than the height of the ventilation slot, the armature pressure ring only presses the ring when it is pressed against the ventilation slot, and the ventilation slot cannot be compressed; during the operation of the motor, the rotating The ventilation slots in the armature may fly out, and the teeth of the armature punches will bounce off, which will cause noise during operation, and the vibration of the teeth will cause damage to the slot insulation, which will shorten the service life of the motor

If the height of the ring is lower than the height of the ventilation slot, the pressure ring may not be able to press the inner circle of the armature iron core tightly, the inner circle of the iron core will be deformed, and the actual interference with the shaft will become smaller. After long-term use, slipping and displacement will occur. malfunction

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