What is the reason for the large axial vibration of the motor?
Smallmotor shaftIt usually has the characteristics of high speed, frequent start-up and easy heating during work. Reasonable material selection and heat treatment are important tasks for every designer. Appropriate heat treatment methods usually require only half the effort to obtain twice the results.
The motor shaft is usually made of high-quality carbon steel. can choose35＃，45#. general use45# Steel. These two materials belong to medium carbon steel, and their strength, stiffness and toughness can meet the working requirements of the motor shaft. The motor shaft has a high speed and low torque. It consists45# Made, no other heat treatment is required. Raw materials are in normal condition. The supply performance of raw materials can meet the mechanical performance requirements of the motor shaft.
What is the reason for the large axial vibration of Sanhe recommend motor?
1.Electromagnetic aspects.2.Mechanical aspects.3.Electromechanical mixing.
1. electromagnetic aspects
1.In terms of power supply: three-phase voltage (unbalanced, three-phase motor running in the state of lack of phase).
2.Stator: The iron core becomes oval, eccentric, loose, winding damage, grounding breakdown, inter-turn short circuit, wiring error, and three-phase current imbalance.
3.Rotor failure: the iron core becomes oval, eccentric, loose, and the rotor short-circuit ring and cage bar are welded or damaged. The three-phase winding of the wound rotor is unbalanced, the winding is damaged, the ground breakdown, the inter-turn breakdown, the wiring is wrong, and the brush contact is poor.
2. mechanical aspects
1.As far as the motor itself is concerned: the rotor is unbalanced, the rotating shaft is bent, the slip ring is deformed, the air gap between the stator and the rotor is uneven and the magnetic core is inconsistent. Bearing failure: poor foundation installation. Insufficient mechanical strength. Resonance, the fixing screws are loose, and the motor fan is damaged. When the bearing is running close to its service life, the vibration of the motor will gradually increase, noise will be generated during the operation of the bearing, and the phenomenon of shaft grinding and cover sweeping may occur.
2.Coupling coordination: coupling damage, poor connection, inaccurate alignment and unbalanced system resonance.
3. electromechanical hybrid
1.Motor vibration is usually caused by an uneven air gap, which will cause unidirectional electromagnetic tension, thereby further increasing the air gap, and the electromechanical mixing effect is manifested as electromechanical vibration.
2.The motor moves axially. The electromagnetic pull force caused by the rotor's own gravity or installation height and the magnetic center causes the motor to move axially, thereby causing the motor to vibrate. In severe cases, the bearing bushing wears and the bearing temperature rises rapidly.
Motor shaft, micro shaft, stainless steel shaft
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2024-01-02
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