explosion proof low voltage motor bearings should be stored in a dry warehouse with a relative humidity not exceeding 60%. The temperature variation in the warehouse should be maintained within the range of +8 to +30℃, preferably lower, to prevent the bearings from rusting due to the loss of their oil film. Under such moist and stable conditions, it can be stored for 6 to 8 months. If the warehouse conditions are very standard, it can be stored for a year without rusting. Otherwise, anti-rust oil should be reapplied every six months or so.

When the motor is sent to the user, it should also generally meet the above conditions.

2. Transportation

If the motor is transported on the railway, it is ideal to keep the motor shaft perpendicular to the track when loading to avoid the bearings being impacted during transportation.

3. Installation

The foundation must meet the requirements; otherwise, it will affect the normal use of the motor.

After the motor and the driven equipment are installed and started up, if it is found that the sound and vibration values are significantly different from those during cold start-up, wait until the heating stabilizes before stopping the machine for secondary coaxiality correction.

4. Usage and Maintenance

Temperature monitoring devices should be added to the bearings. At present, domestic manufacturers of medium-sized explosion-proof motors have included this measure in their product improvement plans. Some enterprises have purchased temperature monitoring components themselves and installed them on the outer covers of the bearings.

Under normal circumstances, there is no change in the temperature and noise at the bearing. If the temperature keeps rising, the machine should be stopped immediately regardless of whether it has reached the alarm point or not. At the same time, the alarm temperature should have a certain margin because the contacts of the temperature-sensing element cannot reach the hottest part of the bearing.

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