Centrifugal pump housing casting technology

Abstract

The invention relates to a centrifugal pump housing casting technology. The casting technology comprises the following steps: S1, casting preparation; S2, molding of lower molding sand; S3, molding ofan upper sand tank: firstly, uniformly installing inner support columns in square holes of the upper sand tank, then adjusting telescopic mechanisms according to the structure of the pump surface tomove moving columns to proper positions, and then putting the molding sand into the upper sand tank and putting a mold to mold the molding sand; S4, molding sand setting; S5, sand tank casting; S6, housing grinding. Each telescopic mechanism comprises an adjusting column, a threaded rod, a locking frame, locking springs and turning branch chains. The problems that reinforcing ribs are added to theexisting upper sand tank, the supporting effect on the molding sand in the upper sand tank is poor due to small supporting area of the reinforcing ribs and stability of the reinforcing ribs is poor because casting may be affected when the reinforcing ribs are used for supporting housings of different types, and an integral supporting structure cannot be formed between the reinforcing ribs can besolved.

Description

technical field [0001] The invention relates to the technical field of pump body processing, in particular to a casting process for a centrifugal pump casing. Background technique [0002] Centrifugal pumps are used to transport slurry containing solid particles, and can be widely used in electric power, metallurgy, coal, building materials and other industries, such as hydraulic ash removal in thermal power plants, slurry transportation in metallurgical beneficiation plants, coal slurry and heavy medium transportation in coal washing plants, etc. [0003] The basic structure of the centrifugal pump is composed of six parts: impeller, casing, pump shaft, bearing, sealing ring and stuffing box. The casing of the centrifugal pump is processed by casting. The casing of the centrifugal pump is cast due to its The shape and structure are relatively complex, which can easily lead to deformation and dislocation of the cavity of the molding sand in the upper sand box, which will lea...

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Problems solved by technology

[0003] The basic structure of the centrifugal pump is composed of six parts: impeller, casing, pump shaft, bearing, sealing ring and stuffing box. The casing of the centrifugal pump is processed by casting. The casing of the centrifugal pump is cast due to its The shape and structure are relatively complex, which can easily lead to deformation and dislocation of the cavity of the molding sand in the upper sand box, which will lead to problems such as poor casting effect of the centrifugal pump shell. Add reinforcing ribs to strengthen the support. The problems of adding reinforcing ribs in the existing upper sand box are as follows:

[0004] The supporting area of ​​the reinforcing ribs is small, and the supporting effect on the molding sand in the upper sand box is poor; and the position adjustment of the reinforcing ribs is relatively cumbersome, and the casting may be affected when supporting different types of shells, and the forming of the reinforcing ribs cannot be achieved. An overall support structure that makes it less stable

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