Single downdraft electric driving pump structure capable of automatically balancing axial force

Abstract

The invention discloses a single downdraft electric driving pump structure capable of automatically balancing an axial force, which comprises a motor, impellers, a pump body water inlet and a water outlet, wherein the water inlet is formed at the lower end of a pump body, has a downdraft structure and comprises a water intake section, a middle water distribution section and an upper discharge section from bottom to top; the motor is arranged at the position of the water intake section; the impellers are arranged in the middle water distribution section which consists of a multi-stage pump; forward guide vanes are arranged in a lower-stage pump body; backward guide vanes are arranged in an upper-stage pump body; and the forward guide vanes and the backward guide vanes have opposite rotating directions and symmetrical structures. The single downdraft electric driving pump structure capable of automatically balancing the axial force adopts the structure with one-way water intake and oppositely arranged impellers and also adopts a mode of symmetrically arranging the forward guide vanes and the backward guide vanes so as to completely eliminate the coaxial force; and a difference between forward and backward rotation stages of the forward guide vanes and the backward guide vanes can be one stage so as to control the direction of the coaxial force, make the motor run in an optimal functional mode, and greatly prolong the service life of the electric pump.

Description

technical field [0001] The invention relates to a structure of a downward-suction single-suction self-balancing axial force submersible pump. Background technique [0002] In coal mine production, drainage electric pump is very important equipment, and the electricity it consumes in coal mine production generally accounts for 10-30% of the total mine electricity consumption. Therefore, improving mine drainage to achieve economical operation and improving the efficiency of the drainage system from all aspects is not only conducive to the safe production of mines, but also an important measure to save electricity. [0003] Considering the particularity of mine drainage with high suddenness and large flow rate, the huge axial thrust generated by the operation of the water pump must be transmitted to the motor rotor. The greater the flow rate, the higher the lift, the greater the axial force. Calculated on the basis of a flow rate of 300 tons per hour and a head of 500 meters,...

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Problems solved by technology

Calculated on the basis of a flow rate of 300 tons per hour and a head of 500 meters, the axial thrust is about 7000kg, and the conventional structure cannot bear the axial thrust

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