Nearly-zero inner leakage fluoroplastic magnetic drive pump

Abstract

The invention relates to a nearly-zero inner leakage fluoroplastic magnetic drive pump; a pump shaft and an impeller and inner and outer worm body walls are matched and mounted through a weight-carrying roller bearing, an axial ball bearing and a seal ring, thus reducing vibrations and noises caused by poor impeller dynamic balancing, effectively stopping axial floating of the pump shaft and the impeller, reducing friction heat, so the pump can do idle running in certain time period, and magnetic drive pump anti-dry grinding performance can be enhanced; inner parts of a pump cavity are made of corrosion resisting material, thus improving magnetic drive pump corrosion resisting performance; a gap [delta] is kept in a seal ring friction pair outer circumference end face, so no friction heat is generated; on an seal ring friction pair inner circumference end face, slide friction is changed into rolling friction so as to reduce heat generated through friction; liquid flowing back from an impeller exit is thrown out along an oblique slot, and a little of remaining backflow fluid passes the seal ring friction pair inner circumference end face and re-thrown by a ball, thus increasing sealing effect, effectively preventing magnetic drive pump inner leakage, and improving magnetic drive pump work efficiency.

Description

technical field [0001] The invention relates to a magnetic pump, in particular to a fluorine plastic magnetic pump with near zero internal leakage. 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...

AI Technical Summary

Problems solved by technology

After the sealing ring is worn, the axial clearance increases, the pump discharge volume decreases, and the pump working efficiency decreases. When the clearance exceeds a certain value, the magnetic pump has no working efficiency.

In addition, friction occurs between the friction pairs of traditional sealing rings, generating heat, which poses serious safety hazards when transporting flammable and explosive media.

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