Manufacturing method of compressor shell and compressor shell

Abstract

The invention discloses a manufacturing method of a compressor shell. The manufacturing method of the compressor shell comprises the following steps: a carbon steel plate is adopted to match with a carbon steel casting or forging to manufacture a parent body of the compressor shell; and a stainless steel inner layer is lined on the inner wall of the parent body. The invention further discloses the compressor shell manufactured by adopting the manufacturing method. The compressor shell manufactured by adopting the method has the characteristics of good manufacturability, short manufacturing period, high manufacturing precision and good product quality.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a casing of a centrifugal compressor and a manufacturing method. Background technique [0002] Centrifugal compressors are generally used in complex chemical processes. In many cases, the working medium of the compressor is highly corrosive, and the compressor casing is required to have an anti-corrosion function. Currently, nitric acid is common , methyl nitrite and other highly corrosive media. [0003] At present, in view of this situation, the casing of the compressor is made of stainless steel casting casing. The advantage of stainless steel casting casing is good corrosion resistance, but it also has many disadvantages, mainly reflected in: [0004] 1. The cost is high. The domestic purchase price of the currently used cast casing is generally in the millions or millions. The slightly larger structural size needs to be imported, and the price is even more expensive. [0005] 2...

AI Technical Summary

Problems solved by technology

[0004] 1. The cost is high. The domestically produced casting casings currently used generally cost millions or millions of dollars. Those with a slightly larger structure size need to be imported, and the price is even more expensive.

[0005] 2. The procurement cycle is long. The overall casting casing is generally complex in structure and large in size. Some conventional ones can be purchased domestically. The casting cycle is generally 6-10 months depending on the specific situation. Some larger sizes need to be imported. The casting cycle is usually within 10-14 months

[0006] 3. There are many casting defects, and various casting defects will inevitably appear in the cast casing. During the finishing process of a casting casing, defects will appear from time to time, requiring on-site repairs, and the manufacturing process is poor.

[0007] 4. The casting deviation is large, and the casting parts, especially the large casing, have a large size deviation, and often need to be repaired to ensure the manufacturing accuracy

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