Closed self-circulation cooling submersible sewage pump

Abstract

A closed self-circulation cooling submersible sewage pump comprises a pump seat, a pump body, a pump cover, a connecting seat, a cooling shell and an upper end cover which are sequentially connected, a bearing seat is arranged above the connecting seat, a motor shell is arranged in the cooling shell, and a cooling cavity is formed between the motor shell and the cooling shell. The periphery of the bearing seat is hermetically connected with the connecting seat and the motor shell. A pump shaft is arranged in the motor shell. An auxiliary impeller and an impeller are sequentially connected below the pump shaft. A separation guide plate is connected in the connecting seat, an upper cavity is formed between the separation guide plate and the bearing seat, and a lower cavity is formed between the separation guide plate and the pump cover. The upper cavity and the lower cavity communicate with the cooling cavity via through holes. A mounting opening is reserved in the middle of the separation guide plate, and the auxiliary impeller is arranged in the mounting opening. The closed self-circulation cooling submersible sewage pump solves the problem that the motor is likely to burn out due to the cooling defect of the motor. The repair rate is reduced, and the operation efficiency of the water pump is improved. After-sale cost is reduced and service life of the water pump is prolonged.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to a closed self-circulation cooling submersible sewage pump. Background technique [0002] Submersible sewage pumps are mainly used in municipal engineering, industry and agriculture, hospitals, buildings, hotels and other industries. They are used to convey waste water with solid particles and various long fibers, such as urban domestic sewage and rainwater. It also includes raw water transportation and aquaculture. , irrigation, etc.; because the water level of the sewage pool is constantly changing, the running water level of the sewage pump will be low when the sewage pump is running, and the motor part cannot be completely submerged in the water or only a very small part is submerged in the water, resulting in poor cooling effect of the motor. The temperature rise of the motor winding is too high, causing the motor to burn out, especially for medium and large sewage pumps ...

AI Technical Summary

Problems solved by technology

[0004] This type of pump structure mainly has the following defects: 1. When the pump is used in large medium particles or the concentration of mud and sand in the sewage is high, the cooling channel is easy to block; 2. In the sewage environment, when the pump stops for a long time After running, there will be dirt scaling between the cooling cavity and the outer wall of the motor casing. When the operation is started again, the amount of cooling water will be affected due to the blockage of dirt, which will lead to a decrease in the cooling effect of the motor and the risk of motor burnout. ;3. The external circulating water structure has high requirements for customer installation and use conditions, which is not conducive to reducing costs; therefore, it is necessary to improve the pump mechanism

Images