Stainless steel dry-resistant running magnetic pump

Abstract

The invention discloses a stainless steel dry-resistant running magnetic pump, comprising a pump body, an impeller, a pump cover, a bearing seat, a coupling frame, a pump shaft, a spacer sleeve, an outer magnetic rotor, an inner magnetic rotor, a motor, a first ceramic bearing, and a second ceramic bearing, and a circlip for a hole. The bearing seat is installed between a pump shaft and the spacersleeve, and the first ceramic bearing and the second ceramic bearing capable of withstanding high temperature and low temperature are respectively disposed on both ends of the bearing seat. Both bearings are zirconia ceramic ball bearings, and an annular heat-dissipating inner cavity is formed between the two bearings. A double-layer isolating sleeve made of a non-metallic engineering material isarranged between the inner magnetic rotor and the outer magnetic rotor, so that eddy current heat generated when magnetic field lines are cut is zero. The large-opening type coupling frame is provided with the outer magnetic rotor and the inner magnetic rotor, the pump cover and a plurality of venting holes on the bearing seat, and forms a unique cooling ventilating and cooling system. The dry-resistant running magnetic pump realizes no temperature rise of the pump during dry running, and breaks through a forbidden zone that a traditional magnetic pump is strictly prohibited from being idling.

Description

technical field [0001] The invention relates to a magnetic pump, in particular to a stainless steel dry-running resistant magnetic pump. Background technique [0002] Fully sealed, leak-free, corrosion-resistant magnetic drive centrifugal pumps (magnetic pumps) have become conventional equipment widely used in petroleum, chemical, pharmaceutical, nuclear industry, environmental protection and other departments. As we all know: the sliding bearings used to support the weight of the impeller and rotor inside the magnetic pump rely on the conveyed medium for lubrication and cooling. Therefore, the traditional magnetic pump will mark the warning "no load is strictly prohibited" on its product nameplate. However, industries that use magnetic pumps generally operate continuously for 24 hours, especially at night when no one is on duty. The eddy current heat and the friction heat of the sliding bearing increase sharply, which will cause the friction pairs such as the sliding beari...

AI Technical Summary

Problems solved by technology

However, industries that use magnetic pumps generally operate continuously for 24 hours, especially at night when no one is on duty. The eddy current heat and the friction heat of the sliding bearing increase sharply, which will cause the friction pairs such as the sliding bearing to aggravate the wear, the inner magnetic rotor and the isolation sleeve will be damaged by friction and leak, the inner and outer magnetic rotor will be demagnetized due to temperature rise, and more serious will cause Larger accidents with the entire facility

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