Deep well water pump cooling

Deep well water pump cooling
Machine outside the water cooling, the machine air cooling
This cooling method is mainly used in deep well water pump and submersible sewage pumps. The inner cavity of the dry motor is filled with air, and the heat dissipation of the stator winding end and the rotor mainly depends on the air inside the machine. Stator iron loss of the stator, slot stator windings taken away by the casing surface water. The rotor winding resistance loss and rotor iron loss generated by heat, part of the air gap directly to the stator core, the shell passed to the motor outside the well water away; the other part of the machine to the air, this part Heat and stator end windings to another part of the air resistance loss heat and mechanical loss of heat generated by the machine flow of air to the stator core, housing and bearing seat, and finally through the motor housing and bearing seat 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 wells for type submersible motor stator windings and rotor windings of the cooling conditions are poor, the temperature rise is relatively high. In this case,
Machine water cooling, machine oil cooling
The stator iron loss, the stator slot winding resistance loss and the partial winding loss resistance heat generated directly through the stator core, through the casing to flow through the casing surface of the well water away. Rotor rotor resistance loss and iron loss of the heat generated by the part of the oil in the air gap directly to the stator, the shell passed to the motor outside the well water away; the other part of the transfer to the rotor cavity filled In this case, the heat is transferred to the stator core, the housing and the bearing via the oil filled in the cavity together with the heat generated by the loss of heat from the other part of the stator fluid passed through the stator end winding and the mechanical loss. Seat, and finally through the motor housing and bearing parts and other parts of the surface to the well water away from the motor. Oil-filled deep-well pump that is used in this cooling. Oil-filled motors are filled with insulating oil. The stator core, stator windings, rotor core and rotor windings (rotor bar and rotor end ring) are immersed in oil.
Outside the double water-cooled way, the electric motor inside
This motor inside and outside the cooling effect of dual water cooling, so well water-filled submersible pumps and wells with submersible pump stator windings are generally relatively low temperature rise. The stator core, stator windings, rotor core and rotor windings (rotor bar and rotor end ring) are immersed in the water, directly from the machine's internal water pump, Water cooling. The stator iron loss, the stator slot winding resistance loss and the partial winding loss resistance heat generated directly through the stator core, through the casing to flow through the casing surface of the well water away. The rotor winding resistance loss and rotor iron loss generated by heat, part of the air gap directly to the stator, the stator to the motor outside the well water away; the other part of the rotor cavity to the water, this part of the heat and the stator end The internal windings pass to the cavity filled with water, another part of the loss of heat and mechanical loss of heat generated by the cavity filled with water to the stator core, housing and bearing, and finally through the motor housing and bearing blocks and other zero The surface of the part is carried away by the well water. In this case,
The rotor is directly cooled by water, and the stator case is cooled by water
Motor stator iron loss and stator winding resistance loss of heat generated directly through the stator core or cavity filling, the shell passed through the casing surface of the well water away. The rotor winding resistance loss and rotor iron loss generated by heat, part of the air gap through the water and shield directly to the stator, the stator to the motor outside the well water away: the other part of the rotor cavity to the charge Of the water, this part of the heat and mechanical loss of heat generated by the cavity filled with water to the stator core, housing and bearing seat, and finally through the motor housing and bearing parts and other parts of the surface specifically to the motor outside Of the well water away. This cooling method is mainly used for wells with shielded submersible motor. The motor stator is a separate sealed chamber, the stator core and winding encapsulation, filled with epoxy resin or plastic filler, the rotor cavity filled with water.