1. Check the parts: submersible pump impeller, ring, sleeve, bearing and others are wearing parts. The first part of the pump should be removed, check whether the vulnerability is intact. Use of damage and non qualified spare parts.
2. Replace the lubricating oil: open the sealing chamber and the motor oil hole screw, the sealing interior and motor oil all released, the replacement of new oil, to ensure the normal operation of the lubrication system.
3. Anti rusting shell pump down: before the spring should open the shell on a pump, starter switch and then rotate the impeller to prevent rusting parts and should not normally start to burn motor. This maintenance is particularly important for water filled motors.
4. To ensure the sealing of agricultural submersible pumps: very strict requirements for sealing, in the interior to replace oil seal, if found in oily water and high turbidity, it must be a replacement or replacement of the seal box or the sealing ring, to ensure its good sealing performance.
5. Dry motor: 500 zhaooubiao measuring pump casing of the winding and insulation resistance. If the resistance of less than 500 billion ohms, it should repel water motor. Drying methods: external drying method, current drying method and the combination of both dry method. The external drying method is the use of external heat treatment, commonly used measures: 1: the use of hot air blower electric heater (agricultural
small submersible pump available to achieve the hair dryer) blowing hot air drying; bulbs baking in a closed box, baking using a number of 200 Watts bulb. Note that the baking temperature is not too high, should be controlled at 125 DEG C; the current drying: according to the impedance of the submersible pump size and power will be three-phase motor winding in series or in parallel, and then access a variable resistor, adjust the current volume around the rated current value of 60%, electricity dry.
6. To ensure that the bearing lubrication: the water filling submersible pump should be replaced on the bottom cover of the bearing housing and the framework of the oil seal and lithium base grease. To ensure that the bearings are lubricated for a long time in a state of good lubrication.
7. Bearing inspection: check the motor part of the upper and lower bearing, wear and tear or if the gap is too large, should be the timely replacement of the new bearings is "sick" improvise. Check method is as follows: if the motor is running, "Ka thump" sound, and the cycle is proportional to the speed, and the rotation of the rotor with the hand feeling is laborious, bearing raceway is acerbity or avulsion phenomenon; if issued bearing intermittent "choking choking sound, the rotation of the rotor by hand when the dead point uncertainty, the general frame are damaged ball, inner ring cracking or breaking ball. In the case of the above, the bearing must be replaced so as not to cause greater damage.
