Noise problems of flour machinery and solutions:

发布时间：2022-07-01 点击次数：

1. The abnormal noise of the windshield has a great relationship with the conformity of the windshield. During the processing, the welding points are rough, the edge of the small mouth of the windshield is inconsistent, and the end of the rotor is often rubbed during assembly.

2. Electromagnetic sound is divided into high frequency and low frequency. The shaft iron core position oblique groove degree is not in good conformity, the iron core inner bore is not good, and the rotor outer diameter machining is inconsistent are the factors that can not be ignored that lead to the two types of faults. This type of problem is usually eliminated and solved by replacing the rotor.

3. The motor makes a high and low and heavy sound. Reasons may be:

① The air gap between the stator and the rotor is not uniform. At this time, the sound fluctuates high and low and the interval between high and low sounds is unchanged. This is caused by bearing wear that makes the stator and rotor not concentric.

② Three-phase current is unbalanced. This is due to the faulty grounding, short circuit or poor contact of the three-phase windings.

③The iron core is loose. During the operation of the motor, the iron core fixing bolts are loosened due to vibration, which causes the iron core silicon steel sheet to loosen and emit noise.

4. Bearing noise, the bearing will make a certain sound during operation. If the bearing is running normally, the sound will be continuous and small "rustling" sound, and there will be no sudden high and low changes and metal friction sound. It is normal if the following sounds appear.

① There is a "squeak" sound when the bearing is running. This is the sound of metal friction, which is generally caused by the lack of oil in the bearing. The bearing should be disassembled and added with appropriate amount of grease.

②If there is a "squeak" sound, it is the sound made by the ball when it rotates. It is usually caused by the dry grease or lack of oil. You can add an appropriate amount of grease.

③If there is a "click" sound or a "crunch" sound, it is the sound caused by the irregular movement of the balls in the bearing, which is caused by the damage of the balls in the bearing or the drying of the grease after the motor is not used for a long time.

5. The uneven collision sound is caused by the collision of the fan blades against the fan cover.

6. The noise caused by the virtual friction of the stator and rotor is a limit state of sweeping.

7. The noise of insulating paper, due to the noise caused by improper placement of stator or rotor slot insulation, it is not easy to find the specific location when dealing with such faults.

8. Other factors such as the partial ejection of the slot wedge, vibration, and the length of the bearing cap fixing bolts are also part of the reason for the noise.