How can I quickly detect the quality of the motor reducer?

How can I quickly detect the quality of the motor reducer?

Yesterday, an agent who just started to consult with us: "When the gear reduction motor is in use, how to quickly detect and judge the quality of the gear reduction motor?" In response to this problem, the engineers of the sailing gear motor will teach you some methods to judge.

When the gear reduction motor runs or fails, it can generally prevent and eliminate the fault by watching, touching, listening and smelling four ways to ensure the safe operation of the motor reducer.

one look

Observe whether there is any abnormality in the running process of the motor reducer. The main performances are as follows.

1. When the stator winding is short-circuited, the motor may see smoke.

2. When the motor of the geared motor is seriously overloaded or lacks phase operation, the speed will be slower and there will be a heavier "click" sound.

3. The gear motor of the geared motor is running normally, but when it stops suddenly, it will see sparks at the loose connection; the fuse is blown or some part is stuck.

4. If the motor of the geared motor is vibrated violently, it may be that the transmission is stuck or the motor is not properly fixed, and the foot bolt is loose.

5. If there are discoloration, burn marks and smoke marks in the contact points and joints of the motor of the geared motor, it may indicate local overheating, poor contact at the conductor connection or burnt of the winding.

Second, smell

By smelling the smell emitted during the operation of the motor reducer, it is also possible to judge and prevent malfunctions.

1. Open the junction box and sniff it with your nose to see if it has a burnt smell. If a special paint smell is found, the internal temperature of the geared motor is too high. 2. If it is found to have a heavy paste or burnt smell, it may be It is the insulation repair network that is broken down or the windings have burned out.

3. If the gearbox of the geared motor has no taste, it is necessary to measure the insulation resistance between the winding and the casing to less than 0.5 mega megameter and dry it.

4. The resistance is zero, indicating that it is damaged.

Third, listen

When the geared motor is running normally, it should emit a uniform and light "click" sound, no noise and special sound. If the noise is too large, including electromagnetic noise, bearing noise, ventilation noise, mechanical friction, etc., it may be a malfunction or failure phenomenon.

1. For electromagnetic noise, if the geared motor produces a high, low, and heavy sound, the reasons may be the following.

(1) The air gap between the stator and the rotor is not uniform. At this time, the sound is high and low and the interval between the high and low sounds is constant. This is caused by the wear of the bearing and the difference between the stator and the rotor.

(2) Three-phase current imbalance. This is the reason that the three-phase winding has a wrong grounding, short circuit or poor contact. If the sound is very dull, the motor is seriously overloaded or lacks phase operation.

(3) The core is loose. The gear reduction motor is loosened by the iron core fixing bolt due to vibration during operation, causing the iron core silicon steel sheet to loosen and emit noise.

2. For bearing noise, it should be monitored frequently during the operation of the geared motor. The monitoring method is: the end of the screwdriver is placed against the bearing installation part, and the other end is close to the ear, and the bearing running sound can be heard. If the bearing is running normally, its sound is continuous and small "sand" sound, there will be no change in height and friction and metal friction. If the following sounds occur, it is abnormal.

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

(2) If there is a "beep" sound, this is the sound produced when the ball rotates. Generally, it is caused by dry or lack of oil. It can be filled with proper amount of grease.

(3) If there is a "snake" sound or a "click" sound, it is the sound generated by the irregular movement of the balls in the bearing. This is caused by the damage of the balls in the bearing or the long-term use of the motor, and the grease is dry.

3. If the transmission mechanism and the transmission mechanism emit sounds that are continuous rather than high and low, they can be handled in the following cases.

(1) The periodic "beep" sound is caused by the unevenness of the belt joint.

(2) Periodic "beep" sound, caused by loose coupling between the coupling or pulley and the shaft, and wear of the key or keyway.

(3) Uneven collision sound is caused by the fan blade colliding with the fan cover.

Fourth, touch

Touching the temperature of some parts of the motor reducer can also determine the cause of the malfunction. To ensure safety, apply the back of the hand to the gear reducer housing and the surrounding parts of the bearing. If the temperature is abnormal, the reasons may be the following.

1. Poor ventilation. Such as the fan is off, the air duct is blocked.

2. The overload of the geared motor causes the current to be too high and the stator windings to overheat.

3. The gear winding motor stator windings are short-circuited or the three-phase current is unbalanced.

4. Frequent start or brake.