Self-balancing double-suction electric diving pump

Abstract

The invention discloses a self-balancing double-suction electric diving pump, which comprises a motor rotor 1, a rotor shaft 2, a bearing 3, an oil chamber 4, a mechanical seal 5, an oil chamber cover 6, an outer mechanical seal 11, a grating-including water inlet joint 12, a double-suction impeller 13, locking bolts 14, a volute 15 and a grating-including base (16), wherein the oil chamber cover 6 and the grating-including water inlet joint 12 are arranged in sequence on the lower part of the rotor shaft 2; the outer mechanical seal 11 is arranged on the rotor shaft 2 at the lower end of the oil chamber cover 6; the double-suction impeller 13 is arranged at the bottom of the rotor shaft 2 through two locking bolts 14; the volute 15 is arranged at the lower end of the grating-including water inlet joint 12; and the grating-including water inlet joint 12 is arranged at the lower end of the volute 15. Due to the adoption of the self-balancing double-suction electric diving pump, the axial force of the pump is reduced effectively, the service life of the bearing is prolonged, the reliability of the bearing is enhanced, accidents caused by loosening of the impeller is prevented effectively, impurities and large particles in water can be prevented from entering the pump, effective and reliable running of a water pump is ensured, and the sealing performance is enhanced.

Description

technical field [0001] The invention relates to a submersible electric pump, in particular to a self-balancing double-suction submersible electric pump. Background technique [0002] Existing submersible electric pump comprises motor rotor 1, rotor shaft 2, bearing 3, oil chamber 4, mechanical seal 5, oil chamber cover 6, cover pump 7, impeller 8, cover shape lock nut 9 and volute 10 (as figure 1 As shown), the motor rotor 1 is located on the upper part of the rotor shaft 2, and the bottom of the rotor shaft 2 has threads connected with the cap-shaped lock nut 9, the oil chamber 4 is installed in the middle of the rotor shaft 2 through the bearing 3, and the mechanical seal 5 is located on the oil On the rotor shaft 2 in the chamber 4, the oil chamber cover 6 and the cover pump 7 are sequentially installed on the lower part of the rotor shaft 2, the impeller 8 is installed on the bottom of the rotor shaft 2 through a single cover-shaped lock nut 9, and the volute 10 is insta...

AI Technical Summary

Problems solved by technology

Since the axial force P of the rotor is all borne by the lower end bearing of the motor, the bearing of the motor is overstressed, and the long-term fatigue operation seriously affects the service life of the pump.

[0003] At the same time, since the impeller 8 is installed on the bottom of the rotor shaft 2 through a single cover-shaped lock nut 9, the stress point is too concentrated in the center of the rotor shaft 2, and the motor will often reverse when the water pump is turned on (or when it is turned on in a moving position). When the motor is reversed, the rotation direction of the motor is opposite to that of the cap-shaped lock nut 9, which will cause the cap-shaped lock nut 9 to loosen, causing the impeller 8 to loosen and cause an accident.

[0004] Moreover, in the existing submersible pumps, since there is no grille at the water inlet, impurities and larger particles often enter the pump, causing blockage of the pump flow channel and a decrease in the flow rate.

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