Deep well pump cooling (b)

Xiaobian to introduce the remaining two cooling methods:
Deep well pump cooling (C) machine oil cooling, water cooling outside the machine
QY oil-filled submersible pump is also used in this cooling method. Oil-filled motor interior wall full of insulating oil, the internal parts are immersed in oil. The heat generated by the loss of the resistance of the motor directly passes through the stator core and is taken away by the well water flowing through the surface of the casing. Part of the resistance loss of the rotor winding heat generated by the oil in the air gap is directly passed to the stator, the shell passed to the well water away from the motor; the other part of the heat transfer to the rotor cavity of the liquid, and then Transmission to the stator core, chassis and bearing, and finally through the motor parts and components to the motor outside the well water away.
Deep well submersible pump cooling (4) machine air cooling, water cooling outside the machine
This cooling method is mainly used for dry well submersible pump. The inner cavity of the dry motor is filled with air, and the internal heat dissipation path of the internal parts is mainly dependent on the air inside the machine. The stator iron loss of the motor and the heat of the stator slot windings are removed by the well water on the housing. The rotor winding resistance loss and rotor iron loss of heat generated by the part of the air gap directly to the stator core, the shell passed to the motor outside the well water away; the other part is passed to the air inside the machine, the machine Inside the flow of air to the stator core, chassis and bearing, and finally through the motor housing and bearing parts and other parts of the surface to the motor outside the well water away. Because of the poor thermal conductivity of air, heat capacity and very small. So this well with submersible pump cooling conditions are poor, the temperature rise will be relatively high.