Machining method of machine case of ultra-heavy and ultra-large-size type compressor

Abstract

The invention discloses a machining method of a machine case of an ultra-heavy and ultra-large-size type compressor and belongs to the technical field of air compressors. The machining method of the machine case of the ultra-heavy and ultra-large-size type compressor comprises the following steps: machining a centrifugal section shell of the air compressor, wherein the machining of the centrifugal section shell of the air compressor comprises the following steps: carrying out rough machining on the centrifugal section shell, and carrying out stress relieving, shot blasting, reshaping and paint spraying treatment on the roughly machined centrifugal section shell; carrying out semi-finishing machining on the machined centrifugal section shell subjected to the paint spraying treatment; carrying out first time of water pressure test on the centrifugal section shell subjected to the semi-finishing machining; carrying out fine machining and second time of water pressure test on the centrifugal section shell subjected to the first time of water pressure test; machining a central machining machine case and a sealing ring of the air compressor. With the adoption of the machining method of the machine case of the ultra-heavy and ultra-large-size type compressor, the machining size of each part of the centrifugal section shell is guaranteed; the precision of the central machining machine case can be guaranteed, and the precision can also be guaranteed after the sealing ring and the central machining machine case are assembled; the machine case is not deformed by selecting a reasonable water pressure test scheme and a detection scheme.

Description

technical field [0001] The invention relates to the technical field of air compressors, in particular to a processing method for an overweight and oversized compressor casing. Background technique [0002] For large-scale air separation compressor units, especially for air separation compressor units above 100,000 grades, the air compressor casing is often super high and heavy, and its structure is different from that of conventional compressor casings, such as figure 1 shown. The upper and lower casings are respectively composed of an axial flow intake casing, a central processing casing and a centrifugal casing, and the central processing casing and the centrifugal casing are connected through a sealing ring. The connection structure of the casing is special, especially the left end of the casing of the centrifugal section is an open structure without bearing body connection. The supporting span of the bearings on both sides is long (6540mm), the weight of the casing is ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a processing method for super-heavy and super-large compressor casings, which solves or partially solves the problems in the prior art that cannot guarantee the processing size of each part of the casing of the centrifugal section, cannot guarantee the precision of the central processing casing, and cannot guarantee the sealing ring and the central The accuracy of processing the casing after assembly, how to choose a reasonable hydraulic test plan and detection plan to ensure the technical problems of the casing without deformation

Images