Magnetic driving pump

Abstract

A magnetic driving pump comprises a pump body, a pump cover, a pump shaft, an impeller, an outer magnetic rotor, an inner magnetic rotor, an isolation sleeve and a motor. The isolation sleeve comprises a primary isolation sleeve and a second isolation sleeve, the primary isolation sleeve is arranged on one side close to the inner magnetic rotor, the secondary isolation sleeve is arranged on one side close to the outer magnetic rotor, and an interval is reserved between the primary isolation sleeve and the secondary isolation sleeve to form an isolation sleeve cavity. One side of the pump cover is provided with a through hole communicating a pump cavity with an inner cavity, and the other side of the pump cover is provided with a diagonal circulating hole. The front end of the circulating hole is communicated with the pump cavity at the front end of the pump cover, and the rear end of the circulating hole is communicated with a shaft hole. When a medium delivered by the pump is to be heated or cooled, an external heater / cooler is directly transmitted to the pump cavity, a sliding bearing pair and the inner cavity of the isolation sleeve to heat or cool the medium owing to the pump cover and the double-layer isolation sleeve. By the aid of the reasonable structural design, sufficient pressure and flow of all internal circulating and lubricating systems can guarantee stable running of the pump.

Description

technical field [0001] The invention relates to a driving pump, in particular to a magnetic driving pump. Background technique [0002] The two ends of the pump shaft of the traditional magnetic pump are generally fixed on the pump body and the spacer sleeve, and because of the magnetic transmission torque, the spacer sleeve is generally designed to be thin-walled as much as possible, which leads to the isolation sleeve when the pump is running for a long time. It is easy to deform or even scrape with the external magnetic steel to cause rupture and leakage; both ends of the pump shaft are fastened with threads; the circulation lubrication design of the sliding bearing pair is simple, and there is even air inside the isolation sleeve after the pump is filled with liquid before operation, resulting in this The phenomenon of dry running of the pump, when maintaining the pump, there are even some corrosive media in some isolation sleeves; the bearing sleeves are generally made ...

AI Technical Summary

Problems solved by technology

[0002] The two ends of the pump shaft of the traditional magnetic pump are generally fixed on the pump body and the spacer sleeve, and because of the magnetic transmission torque, the spacer sleeve is generally designed to be thin-walled as much as possible, which leads to the isolation sleeve when the pump is running for a long time. It is easy to deform or even scrape with the external magnetic steel to cause rupture and leakage; both ends of the pump shaft are fastened with threads; the circulation lubrication design of the sliding bearing pair is simple, and there is even air inside the isolation sleeve after the pump is filled with liquid before operation, resulting in this The phenomenon of dry running of the pump, when maintaining the pump, there are even some corrosive media in some isolation sleeves; the bearing sleeves are generally made of carbon graphite materials, and the pump shaft directly rubs against the bearing sleeves; the dynamic and static rings are made of carbon graphite and ceramic materials, these materials are It is easy to wear and tear; and it is designed as a single-layer isolation sleeve. When the isolation sleeve is deformed and ruptured under severe working conditions, the medium leaks and causes accidents.

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