Sand-preventive sealing device of submersible electric pump

Abstract

The invention discloses a sand-preventive sealing device of a submersible electric pump, and relates to the field of sand-preventive sealing devices for sealing motor sealing cavities of submersible electric pumps. The sand-preventive sealing device is characterized in that a spiral sand throwing ring (2) is sleeved on a motor rotor shaft (9), a mechanical seal (3) is sleeved on the motor rotor shaft (9) by a shaft sleeve, a rubber pad (6) is arranged between a connecting flange (14) and a bearing block (7), a sand discharge ring (4) is connected onto the connecting flange (14), the connecting flange (14), the bearing block (7) and a motor shell (11) are penetratingly assembled together by connecting screws (12), a bearing is penetratingly mounted on the shaft sleeve of the motor rotor shaft (9), and a motor winding is disposed in a motor sealing cavity (10) of the motor shell (11). By the aid of the sand-preventive sealing device of the submersible electric pump, safety running of the mechanical seal, the motor rotor shaft and the bearing is effectively guaranteed, and the service life of the submersible electric pump is prolonged.

Description

technical field [0001] The invention relates to a sand-proof sealing device for a submersible electric pump, which relates to the field of sand-proof sealing devices for sealing the sand-containing water medium that may enter into the motor sealing chamber of the submersible electric pump. Background technique [0002] When the submersible electric pump is used in the water medium with a large amount of mud and sand, such as drainage of the excavation surface, new well flushing, brine submersible pump, etc., the mud and sand in the water medium can easily enter the motor rotor shaft and mechanical seal Between the motor rotor shaft and the mechanical seal and mud and sand, the rapid wear and tear will cause early damage, so that after the short-term failure of the mechanical seal, the bearing wear will fail, and the motor winding in the electric cavity seal cavity will be burned. Therefore, Preventing the mud and sand in the water medium from entering the mechanical seal and...

AI Technical Summary

Problems solved by technology

[0002] When the submersible electric pump is used in the water medium with a large amount of mud and sand, such as drainage of the excavation surface, new well flushing, brine submersible pump, etc., the mud and sand in the water medium can easily enter the motor rotor shaft and mechanical seal Between the motor rotor shaft and the mechanical seal and mud and sand, the rapid wear and tear will cause early damage, so that after the short-term failure of the mechanical seal, the bearing wear will fail, and the motor winding in the electric cavity seal cavity will be burned. Therefore, Preventing the mud and sand in the water medium from entering the mechanical seal and the motor rotor shaft will cause wear and tear, resulting in the failure of the submersible pump seal, which is a problem that must be solved

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