What are the reasons for the high vibration of the high-precision mirror axis?

The high-precision mirror shaft core of a small motor has the characteristics of high speed, frequent start-up, and easy temperature rise during operation. The rational use of materials and heat treatment is an important task for every designer. The best materials and proper heat treatment methods can often be obtained with good quality and low cost.

High-precision mirror cores need to be resistant to vibration and impact. Therefore, the method of quenching or tempering or carburizing and quenching is used to increase the hardness of the surface of the shaft and improve the wear resistance. The core of the shaft maintains toughness and improves the impact resistance. performance.

The motor shafts are made of high quality carbon steel. Choose 35#, 45#. Use 45# steel as much as you can. These two materials are medium carbon steels, and their strength, rigidity and toughness can meet the working needs of the motor shaft. The motor shaft has high speed and low torque. It is made of 45# and does not require other heat treatment. The raw material is in a normalized state, and the raw material supply performance can meet the mechanical performance requirements of the motor shaft.

There are several reasons for the large axial vibration of the motor.

1. Electromagnetic aspects. 2, mechanical aspects. 3. Electromechanical mixing.

 electromagnetic aspects

1. Power supply: three-phase voltage (unbalanced, three-phase motor missing phase operation).

2, the stator: the core becomes elliptical, eccentric, loose, winding broken, grounding breakdown, turn-to-turn short circuit, wiring error three-phase current imbalance.

3. Rotor failure: the core becomes elliptical, eccentric, loose, and the rotor short-circuit ring and cage strip are welded and broken. The three-phase winding of the wound rotor is unbalanced, winding disconnection, grounding breakdown, turn-to-turn breakdown, wiring error, and poor brush contact.

Second, mechanical aspects

1. The motor itself: the rotor is unbalanced, the shaft is bent, the slip ring is deformed, the air gap of the stator and rotor is uneven, and the magnetic center is not caused. Bearing failure: poor basic installation. The mechanical strength is not enough. Resonance, ground screw loose, motor fan damaged. When the bearing is running close to the service life, the vibration of the motor is gradually increased, and the high-precision mirror core runs with noise, which may cause the grinding of the shaft and the phenomenon of sweeping.

2, the coupling aspect: the coupling is damaged, the connection is poor, the center is not allowed to load the mechanical imbalance system resonance.

Third, electromechanical mixing

1. Motor vibration is often caused by uneven air gap, which causes single-sided electromagnetic pulling force. Pulling force increases air gap into step, and electromechanical mixing acts as electromechanical vibration.

2. The axial movement of the motor, the gravity or installation level of the rotor itself and the electromagnetic tension caused by the magnetic center do not cause the axial movement of the motor, causing the motor vibration to increase, and the bearing bush wears seriously, so that the bearing temperature rises rapidly and the vibration causes the fault.

The above is the high-precision mirror shaft core manufacturers for everyone to introduce relevant information, if you want to know more, please contact us!