Lightweight design method of electromagnetic automatic balancing device

Abstract

The invention discloses a lightweight design method of an electromagnetic type automatic balancing device, belongs to the field of electromagnetic type automatic balancing of rotating machinery, and mainly optimizes the structure of a balancing head and reduces the mass of the balancing head in a mode of combining structural design and electromagnetic simulation. The method has the advantages that structural design and electromagnetic simulation are combined, firstly, the size boundary of the electromagnetic automatic balancing device is determined according to the installation space, and a finite element model is preliminarily established in electromagnetic simulation software; secondly, electromagnetic simulation is conducted on structure parameters such as the thickness of an excitation ring, the thickness of a permanent magnet, the number of teeth and the length of the teeth, the shape of the permanent magnet and the number of ampere turns, and on the premise that the self-locking and driving functions of the balance weight disc are met, the axial and radial thicknesses of related structures of the electromagnetic type automatic balancing device are reduced; and finally, based on an electromagnetic simulation result, light weight of the electromagnetic automatic balancing device is achieved with the assistance of structural design.

Description

technical field [0001] The content of the present invention provides a lightweight design method for an electromagnetic automatic balancing device, which belongs to the technical field of automatic balancing of rotating machinery. Background technique [0002] With the rapid development of modern industry, the rotor speed of rotating machinery is constantly increasing, and the resulting vibration problem is becoming more and more prominent. Vibration failure is an important factor affecting the safe and stable operation of equipment. It reflects the operating status of equipment to a large extent and is the main indicator for evaluating equipment safety. An effective way to solve the vibration problem of rotating machinery is to dynamically balance the rotor. Compared with manual balancing, automatic balancing effectively reduces manual labor and downtime, greatly reduces equipment maintenance costs, and at the same time improves the efficiency of industrial production. ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the limitations of the size and mass of the electromagnetic automatic balancing device itself, it is difficult to install and use the electromagnetic automatic balancing device on equipment with narrow space and strict quality restrictions, such as the main shaft of the propeller engine. Therefore, the lightweight of the electromagnetic automatic balancing device research is very meaningful

However, the weight reduction of the electromagnetic automatic balancing device cannot be reduced blindly. On the premise of ensuring the balance ability, self-locking and driving of the counterweight plate to meet the requirements, the electromagnetic automatic balancing device should be lightweight designed in combination with electromagnetic simulation and structural design. View related patents as follows:

[0005] In 2016, Beijing University of Chemical Technology (public number: CN106312821A) disclosed an integrated side-excitation electromagnetic slip ring automatic balancing device. Located on both sides of the counterweight plate in the axial direction, the radial size of the electromagnetic automatic balancing device is reduced. The disadvantage is that the coil is installed on both sides of the axial direction, and the axial size of the device is greatly increased.

The difference from this patent is that the radial thickness and axial thickness of the device are larger, the required installation space is larger, and the overall quality is heavier

[0006] In 2015, Lord Company (patent number: US8961140B2) disclosed an electromagnetically driven automatic balancing device for propeller aircraft. The counterweight plate of the device is embedded with 200 permanent magnets, and the balance accuracy is very high. However, due to the use of slip rings to achieve internal The excitation structure makes the structure of the device complex and affects the working life of the whole machine

[0008] In 2020, the patent (publication number: CN112417611A) proposed an automatic balance structure design method based on magnetic circuit optimization. The similarity with this patent is that the overall performance of the magnetic circuit is calculated and analyzed through finite element software modeling and simulation. Optimizing and designing an electromagnetic automatic balancing device with stable stepping of the counterweight plate, precise and fast vibration suppression; the difference from this patent is that this method has not considered the lightweight of the electromagnetic automatic balancing device

[0010] The focus of domestic research on electromagnetic automatic balancing devices is to realize the stable self-locking and electromagnetic drive of the counterweight plate, and there is no in-depth research on the lightweight design method of electromagnetic automatic balancing devices

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