The cast aluminum rotor is usually weighted to correct the dynamic balance. Generally, the balance column is set on the end ring of the cast aluminum rotor. The balance point is located by the dynamic balancer, and then the balance pad is riveted on the balance column where the unbalance point is located. . Perhaps Dalan Motor Xiaobian will give you a brief introduction to help you understand the knowledge of the Y series three-phase asynchronous motor rotor balance column.
Cast aluminum rotor balance column and dynamic balance:
(1) The balance column is generally designed to be 8 and evenly distributed in the circumferential direction, so the angle accuracy of its school balance is only 45°, and the accuracy of the school balance is relatively low. For this reason, many motor manufacturers have increased the number of balancing columns in the design process, but they are uniformly distributed.
(2) The weight of the balance pad used for calibrating the balance is often limited by the weight of the balance pad being too large or too small.
(3) The above two deficiencies comprehensively show that the dynamic balance adjustment accuracy of this type of cast aluminum rotor is low and does not meet the development of high precision and high efficiency of the micro motor industry.
(4) Some motor manufacturers have at least two turns of mounting grooves for mounting the balance weights on the outer end faces of the end rings. The two winding grooves are radially distributed, and the number of grooves for each ring is not less than 8 One can achieve radial and circumferential point selection during the balancing process.
In any case, the amount of initial unbalance after the casting of the rotor is sufficiently small is the research goal of the cast aluminum process.
Balance column parameters and rotor quality:
According to the balance method of weighting method, there are some questions about the selection of length and thickness parameters of the balance column, which are directly related to the adopted process and equipment. Choosing the right one can avoid the defects of the cast aluminum rotor and improve the overall beauty of the rotor.
(1) The balance column plays the role of exhaust in the process of cast aluminum. The height, thickness and thickness of the balance column should be comprehensively considered in consideration of the size of the rotor, groove shape, length of iron, equipment pressure, and aluminum hydraulic casting speed.
(2) After the completion of the casting, the balance column is the balance position of the rotor dynamic balance process. The balance column is not easy to be too thin, otherwise it will cause the balance column to break due to the mismatch between its weight and its own bearing capacity, even during motor operation. Quality accidents.
(3) If the balance column is too fine, it will lead to unsmooth exhaust of the aluminum casting process, leading to internal defects in the cast aluminum, and defects in the end ring part will also have different degrees; of course, the thicker the better.
(4) The diameter of the balance column and the inner hole of the balance pad should be matched as closely as possible to prevent the motor from falling off at a later stage of operation.
----- Editor: Dalan Oil Pump Motor 02 - Procurement Consultant
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