Universal Compressor Use 2 Pole 4 Pole 5 HP 4kw 1 Phase AC Motor
Recommendation
Product Description
| Model |
HP |
KW |
Currnet |
Speed |
Eff |
Power Factor |
Tn |
Tmax/In |
Tst/Tn |
| ML-112M2-4 |
5 |
4 |
22.41A |
1440 |
80% |
0.97 |
26.54 |
1.7 |
2.5 |
Company Profile
FAQ
The motor shaft is broken, maybe you have been shot!
The reason for the broken shaft of the motor
(1) Improper assembly
The motor is not concentric with the equipment being dragged, causing the motor to be subjected to excessive radial loads and eventually causing metal fatigue. When the radial load on the extension end of the motor shaft is too large, the motor shaft will be bent and deformed in the radial direction. When the motor rotates, the shaft is deformed by torsion in all directions, which eventually causes the motor shaft to break, and the fracture position is generally close to the bearing.
For a motor connected by a pulley, when some customers equip the motor output shaft with a pulley, because the pulley is too heavy or the belt is installed too tightly, the motor output shaft will be continuously subjected to variable stress during the operation of the motor. The maximum bending moment generated on the shaft is near the fulcrum of the output shaft bearing, and repeated impact causes fatigue, which causes the shaft to gradually crack and eventually break completely.
(2) Excessive vibration of equipment and motor during operation
If the motor is not fixed firmly, such as running on the frame, the entire foundation is unstable and shakes during operation, which will cause the motor belt tension to be unstable, and the shaft will be damaged when the tension is large.
(3) The shaft machining stress groove does not meet the requirements
This problem mostly occurs at the root of the shaft extension. From a large number of case studies, it can be found that the machining of the R angle at the root of the shaft extension is not standardized, resulting in relatively concentrated stress at this position. When the motor is running, it is affected by the alternating stress of the shaft diameter and radial direction, resulting in fracture. .
(4) The stress is not released after the web shaft is welded
This problem mostly occurs in the case of large-sized motor web shafts. Most of the occurrence locations are concentrated at the position where the web end is combined with the main shaft. The shaft fractures have irregular patterns, and most of the early failures of the motor appear to be sweeping. It can only be discovered during the post-inspection process.
For the web shaft, the motor manufacturer should take stress relief measures, some manufacturers use the ultrasonic method, and some manufacturers adopt the annealing process, but the ultimate purpose is to eliminate the stress.
(5) Defects in the shaft design itself
If there is a sudden change in the diameter of the shaft, it is also easy to break, but this problem is relatively small, and there will be relevant requirements in the motor design specification.
The load is too large in an instant; the small horse-drawn cart, the motor shaft is in a long-term fatigue state; the external force collision will also cause the shaft to break. The broken shaft is a relatively complex problem, both the motor manufacturer and the user must pay attention to this problem. to avoid similar problems.
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