Double-suction type centrifugal pump body casting method and cast centrifugal pump

Abstract

The invention provides a double-suction type centrifugal pump body casting method. A horizontal pouring process is adopted by the casting method; the horizontal pouring process comprises an inner coreand an outer mold; and the inner core comprises a first mud core, a second mud core and a third mud core, wherein the first mud core, the second mud core and the third mud core correspond to a firstcavity, a second cavity and a third pipeline, the third mud core is located on a positioning hole of the second mud core, the length of the first mud core protruding from the first cavity opening is one fifth to one third of the total length of the first mud core, and the length of the second mud core protruding out of the second cavity opening is one fifth to one third of the total length of thesecond mud core. According to the double-suction type centrifugal pump body casting method, the horizontal pouring process is selected according to the structural characteristics of a double-suction type centrifugal pump body, and compared with the horizontal pouring process selected by a traditional selection platform, the pump leakage rate can be reduced to be 6% or less.

Description

technical field [0001] The invention relates to the technical field of valve body preparation methods, in particular to a casting method for a double-suction centrifugal pump body and a cast centrifugal pump. Background technique [0002] Different from the single-suction centrifugal pump, the fluid medium of the double-suction centrifugal pump is sucked from both ends of the impeller, and there is a sealing cavity on both sides of the impeller. The suction centrifugal pump has the characteristics of high head and large flow, so it is widely used. [0003] For double-suction centrifugal pumps, to prevent seawater corrosion, the material of the pump body is generally tin bronze. The technical requirements are: hydraulic test pressure 3.5MPa, no leakage is allowed for 5 minutes. The traditional double-suction centrifugal pump casting process adopts the vertical casting process. Although the yield rate is high, because the double-suction centrifugal pump has one more sealing c...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a double-suction centrifugal pump body casting method and a cast centrifugal pump for the problem of high leakage rate of the double-suction centrifugal pump cast by the traditional horizontal casting process.

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