Single-stage dual-suction axially split pump for preventing sealing ring from falling off

Abstract

The invention relates to a single-stage dual-suction axially split pump for preventing a sealing ring from falling off. According to the single-stage dual-suction axially split pump, an impeller and apump body sleeve the middle of a pump shaft, a sealing part is arranged between the pump body and the impeller, pump lids are arranged at the two sides of the pump body, and a filler sealing device and a mechanical sealing device are cooperatively arranged at the pump lids at the two sides respectively and cooperate with the pump lids and the impeller through sealing body rib plates; gaps betweenthe sealing body rib plates and the pump lids is 1.53 mm, and the side which cooperates with an inlet side of the impeller is flush with seam allowance sides of the pump lids; the sealing part comprises an impeller sealing ring sleeving the outer side of the impeller, and the impeller sealing ring and the impeller are locked through radial locking bolts; a pump body sealing ring is arranged at the outer side of the impeller sealing ring and arranged on the pump body. According to the single-stage dual-suction axially split pump, through the improvement of the sealing body rib plates, the effect of cavitation erosion prevention is achieved; meanwhile, through the unique impeller sealing device, the impeller sealing ring is prevented from falling off, and it is guaranteed that the water pump safely and stably runs.

Description

technical field [0001] The invention relates to the field of split pumps, in particular to a single-stage double-suction split pump for preventing sealing rings from falling off. Background technique [0002] Single-stage double-suction split-split pump is also called single-stage double-suction split-split centrifugal pump. Single-stage double-suction split-split pump is generally used in operating areas requiring large flow. The flow rate is large and the lift does not require excessively high circulating water and water supply applications. Occasions, such as large-scale steel mills and metallurgical industries (Tangshan Iron and Steel, Anshan Iron and Steel, Meishan Iron and Steel), thermal power plants and power stations, urban irrigation and drainage, heating, factory drainage, farmland drainage, water supply for air conditioning systems, water supply for mine fire protection systems, petrochemical refineries, mines , chemical plants, textile industry, paper mills, oil...

AI Technical Summary

Problems solved by technology

Traditional single-stage double-suction split pumps have sufficient flow clearance between the rib plate of the sealing body and the pump cover and the inlet of the impeller, but the cavitation performance varies greatly depending on the model, and some pumps have low cavitation resistance. Very good, but some pumps have poor anti-cavitation performance, especially once the pump is operated under off-duty conditions, the pump is prone to cavitation

[0003] At the same time, in the traditional design, the positioning method of the impeller seal ring is fastened by the seam screw, and the seam screw hole needs to be equipped with a hole in the gap between the impeller and the impeller seal ring. Due to the difference in material between the impeller and the impeller seal ring, This drilling is difficult to operate; after tightening with the seam screw, due to the pressure difference and centrifugal force on both sides of the impeller seal ring during pump operation, the seam screw is easy to fall off, resulting in the impeller seal ring coming out and damaging the pump

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