A magnetic pump with corrosion resistance and dry wear resistance

Abstract

The invention discloses a corrosion resistance and dry grinding resistance magnetic drive pump. An outer worm body wall 1 and an impeller adopted by the magnetic drive pump are in fit mounting through a first radial roller bearing 9 and a first axial spherical bearing 8; an inner worm body wall 3 and a pump shaft 7 are in fit mounting through a second radial roller bearing 11; the impeller 2 and the second radial roller bearing 11 are mounted by fitting a second axial spherical bearing 10 therebetween; the vibration and the noise caused by weak dynamic balance of the impeller 2 can be reduced; the axial movement of the pump shaft 7 and the impeller 2 is effectively stopped; the heat generated by friction is largely reduced; the magnetic drive pump can idly operate within a certain time under the conditions of losing and cutting off pumped liquid, so that the dry grinding resistance of the magnetic drive pump is enhanced, and the operation safety of the magnetic drive pump is improved; and the pump shaft 7, the impeller 2, the first radial roller bearing 9, the second radial roller bearing 11, the first axial spherical bearing 8 and the second axial spherical bearing 10 in a pump cavity all select corrosion resistant materials, so that the corrosion resistance of the magnetic drive pump is improved.

Description

technical field [0001] The invention relates to a magnetic pump, in particular to a corrosion-resistant and dry-wear-resistant magnetic pump. Background technique [0002] The magnetic pump is different from the traditional sealed pump. The motor shaft and the pump shaft are not directly connected, but the motor shaft drives the outer magnetic rotor to rotate. The outer magnetic rotor and the inner magnetic rotor cooperate to drive the inner magnetic rotor to rotate through magnetic force. The rotor drives the pump shaft to rotate, so that the impeller rotor on the pump shaft rotates to work. There is a sealing cavity formed by a spacer sleeve between the inner magnetic rotor and the outer magnetic rotor of the magnetic pump, which seals the pump shaft and the inner magnetic rotor in the sealing cavity. One can prevent the liquid from leaking from the pump shaft end to the outside, and the other can prevent the pump from leaking. The shaft and the inner magnetic rotor are c...

AI Technical Summary

Problems solved by technology

The cumulative effect of these times will lead to premature wear of the bearings, resulting in the pump shaft being seriously deviated from the center of rotation, the internal magnetic rotor and the isolation sleeve will be rubbed, and the isolation sleeve will be worn through quickly and high heat will be generated, resulting in leakage of the medium, which is toxic, flammable and explosive. and other substances spread, and even cause major disasters

[0003] Due to the uneven material of the impeller, the accumulation of blank defects, machining errors, assembly errors, etc., as well as the asymmetric geometric shape in the design, etc., the mass distribution of the impeller is uneven and a certain eccentricity is formed. When the impeller rotates, The unbalanced centrifugal inertial force will cause the pump to generate vibration and noise. Poor dynamic balance will reduce the expected service life of the equipment, especially in the early damage of the bearing, shorten the maintenance cycle of the equipment, increase the maintenance cost of the equipment, and affect the product quality. deterioration of the working environment, etc.

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