Shaft end structure, its assembling device, assembling method and centrifugal compressor

Abstract

Disclosed are a shaft end structure, its assembling device, an assembling method and a centrifugal compressor. The structure includes a shaft end and a shaft coupling. The shaft end includes the first shaft, the first shaft is tapered, so that the diameter of one end of the first shaft is larger than the diameter of the other end of the first shaft, and a tapered hole is opened on the coupling, so that the diameter of one end of the tapered hole The diameter of the other end of the taper hole is larger than that of the other end of the taper hole. The first section of the shaft is passed through the taper hole and has an interference fit; the first section of the shaft is provided with a first oil injection channel through which the hydraulic oil can be poured into the first section. Temporary accommodation space between shaft and tapered bore. The shaft end and the shaft coupling can be assembled to obtain the shaft end structure by using the assembly device and the assembly method. The centrifugal compressor includes the shaft end structure. Through the assembling device and the assembling method, hydraulic pressure can be applied to realize the interference fit between the shaft end structure and the coupling, the assembling process saves manpower resources, and the assembling result is reliable.

Description

technical field [0001] The invention relates to the technical field of mechanical assembly, in particular to a shaft end structure, an assembly method, an assembly device and a centrifugal compressor. Background technique [0002] The shaft end of the compressor is usually equipped with a coupling. In order to ensure the connection strength between the shaft end of the compressor and the coupling, an interference fit between the shaft end of the compressor and the coupling is usually required. At this time, since the shaft end of the compressor and the coupling are made of rigid materials, in order to fit the shaft end of the compressor and the coupling with interference, it is usually necessary to temporarily expand the shaft hole of the coupling or make the shaft end of the compressor Temporary necking, in which case an interference fit between the compressor shaft end and the coupling is formed when the assembly process is complete. However, no matter whether it is tempo...

AI Technical Summary

Problems solved by technology

However, no matter whether it is temporarily expanding the neck of the shaft hole of the coupling or temporarily shrinking the shaft end of the compressor, it needs a large labor cost, and even in many cases, due to the temporary necking of the shaft hole of the coupling The process of expanding the neck or temporarily shrinking the shaft end of the compressor is not available, and it is difficult to achieve an interference fit between the shaft end of the compressor and the coupling

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