Axial force self-balancing vertical centrifugal pump

Abstract

The invention relates to an axial force self-balancing vertical centrifugal pump. The axial force self-balancing vertical centrifugal pump comprises a pump shell and a vertical pump shaft. The upper end of the pump shaft is connected with a motor, the lower end of the pump shaft extends into the pump shell and is connected with an impeller in the pump shell to drive the impeller to rotate, and thepump shell is provided with a water outlet. The water inlet end of the impeller is upward. The axial force self-balancing vertical centrifugal pump further comprises a water inlet, a height difference exists between the water inlet and the impeller in the vertical direction, and the water inlet is located above the impeller. The shaft segment, below the impeller, of the pump shaft is connected with the pump shell through a bearing so that stability can be improved. According to the axial force self-balancing vertical centrifugal pump, the loss of flowing energy of the fluid in the pump is small, the pump shaft is retained to be connected with the bearing of the pump shell, and the pump shaft rotates more stably. The water inlet end of the impeller is upward, during working, the fluid is sucked in through the water inlet, the fluid flows to the position above the axis position of the impeller through a suction runner and is further sucked in through the impeller and then thrown out, due to the reactive force of the fluid, the impeller can transit upward axial force to the pump shaft, the dead load of a rotor system is offset and balanced, the axial load is small, correspondingly, the failure rate is reduced, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of non-variable pumps in liquid variable capacity machines, and in particular relates to an axial force self-balancing vertical centrifugal pump. Background technique [0002] A centrifugal pump is a pump that delivers fluid by the centrifugal force generated when the impeller rotates. The fluid is sucked in from the water inlet and pumped out from the water outlet. When working, the pump shaft drives the impeller in the pump casing to rotate at a high speed, and the fluid in the pump casing is thrown to the outer edge of the impeller under the action of centrifugal force, and flows into the pressure water pipeline through the volute flow channel of the pump casing to be pumped out. , the negative pressure area is formed because the fluid is thrown out, the external fluid is sucked from the water inlet under the pressure, and flows continuously to the negative pressure area of ​​the impeller axis through the...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a self-balancing vertical centrifugal pump with axial force, so as to avoid the problem that the downward axial load is too large when the vertical centrifugal pump is working, which affects the service life. When the vertical centrifugal pump is working, the impeller generates an upward axial force to offset the self-weight of the rotor system so that the axial load is self-balanced, the axial load is reduced, the failure rate is reduced, and the service life of the equipment is improved.

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