The impeller uses a balance hole to balance the axial force, and the front and rear cover plates of the impeller are provided with replaceable sealing rings to protect the impeller and the pump body. The lifting tube and protective tube of the intermediate shaft of the pump are multi-section, and the residual axial force of the pump and the weight of the rotor parts are borne by the thrust bearing in the motor seat or the motor with the thrust bearing. The thrust bearing is lubricated with thin oil, and the external water is cooled. The bearing can be embedded with temperature control elements.
Extended data
Vertical long-axis pump is divided into motor part, pump seat part, lifting pipe, water pump body and filter. The pump pipe is connected by thread, which is driven by motor, and the impeller shaft is driven to rotate together through the transmission shaft in the middle of the riser. When the impeller rotates, the water is influenced by the blades, so that the pressure and speed of water increase at the same time. The water flows through the flow channel of the middle shell, is led to the first stage impeller, and flows through all impellers and the middle shell in turn.
The increase of water pressure is proportional to the number of impeller stages. The long shaft deep well pump adopts open impeller, and the axial force is borne by the motor. The impeller is fixed on the same impeller shaft with a cone-shaped opening sleeve, the rubber bearing of the water pump is lubricated with water, and the rotation direction of the water pump is clockwise, so the motor transmission device has an anti-rotation device, and the connection between the pump body and the blade shell is threaded. ?
Reference source; Baidu encyclopedia-vertical long shaft pump