What are the reasons for the large axial vibration of the motor?
Smallmotor shaftGenerally, it has the characteristics of high speed, frequent startup, and easy to heat up when working. Reasonable selection of materials and heat treatment are an important task for each designer. The best use of materials and appropriate heat treatment methods can often receive high quality and low price, and get twice the result with half the effort.
Shafts generally need to be resistant to vibration and impact. Therefore, the general use of quenching and tempering, or carburizing quenching method. To increase the hardness of the surface of the shaft, improve the wear resistance, the core of the shaft to maintain toughness, improve the impact resistance.
The motor shaft is generally made of high-quality carbon steel, 35# and 45# can be selected, and 45# steel is generally used. These two materials belong to medium carbon steel, and their strength, rigidity and toughness can meet the working requirements of the motor shaft. The motor shaft has high rotation speed and small torque. It is made of 45# and does not need other heat treatment. The raw materials are in normalizing state, and the supply performance of the raw materials can meet the mechanical performance of the motor shaft.
motor shaftThere are several reasons for the large vibration?
1. Electromagnetic aspects. (2) Mechanical aspects. 3, mechanical and electrical mixing.
1. electromagnetic aspects
1. Power supply: three-phase voltage.
2. Stator: iron core becomes elliptical, winding disconnection, eccentricity, looseness, ground short circuit, inter-turn short circuit, wiring error, three-phase current imbalance.
3. Rotor failure: the iron core becomes elliptical, eccentric and loose, the rotor short-circuit ring and cage bar are welded and broken, the three-phase winding stage of the wound rotor is unbalanced, the winding is broken, the grounding breakdown, the inter-turn breakdown, the wiring is wrong, and the brush contact is poor.
2. mechanical aspects
1. Motor itself: unbalance of rotor, bending of rotating shaft, deformation of slip ring, uneven air gap of stator and rotor, inconsistent magnetic center, bearing failure: poor foundation installation, insufficient mechanical strength, resonance, loosening of anchor screws, damage of motor fan, gradual increase of motor vibration when the bearing operation approaches its service life, noise in bearing operation, and possible phenomenon of shaft grinding and cover grinding and hall sweeping.
2. Coupling coordination: Coupling coordination: The coupling is damaged, the connection is poor, and the unbalanced system resonance of the center bearing machinery cannot be found.
3. electromechanical mixing aspects
1. Motor vibration is often uneven air gap. Unilateral electromagnetic pulling force is caused, and the pulling force further increases the air gap. The electromechanical mixing effect is manifested as electromechanical vibration.
2、motor shaftMove in tandem. Due to the electromagnetic tensile force generated by the rotor's own gravity, installation level, magnetic center, etc., the motor shaft slides and the motor vibration becomes larger. In severe cases, the metal is worn and the temperature of the metal rises rapidly. Investigate the cause of the vibration.
Motor shaft, motor shaft, micro shaft
Other Content
2024-01-02
Can meet your needs of a variety of materials!
WeChat Public Number
Address:
Foreign companies
Established：April 20, 1994