Connection device, rotor and installation method of semi-open impeller and main shaft of centrifugal compressor

Abstract

The invention discloses a semi-open type impeller and main shaft connection device of a centrifugal compressor and a rotor with the connection device. The connection device comprises an end face tooth I, an end face tooth II, a connection stud and a locking nut. A semi-open type impeller and a main shaft are matched, meshed and connected in a butt joint mode through the end face tooth I and the end face tooth II. The connection stud penetrates through a central hole of the semi-open type impeller, one end of the connection stud is connected with a first threaded hole of the main shaft in a screwed mode, the other end of the connection stud is connected with the locking nut in a screwed mode, and the semi-open type impeller and the main shaft are tightly pressed through the blocking nut. The invention further discloses an installation method for the rotor of the centrifugal compressor. The method includes the steps of firstly, making the end face tooth I meshed with the end face tooth II so that the semi-open type impeller and the main shaft can be connected in the butt joint mode; secondly, making the connection rod screwed down together with the main shaft and the locking nut; thirdly, conducting dynamic balance detection on the device where connection is completed, and after the device meets the requirement, stamping connection marks on the semi-open type impeller and the main shaft. The semi-open type impeller and main shaft connection device is simple in structure and convenient to assemble and disassemble, and the assembly manufacturability of the compressor is improved.

Description

technical field [0001] The invention relates to the field of centrifugal compressors, in particular to a connection device between a semi-open impeller and a main shaft of a centrifugal compressor, a rotor and an installation method. Background technique [0002] The rotor of the centrifugal compressor is composed of the impeller and other parts sleeved on the main shaft. In order to achieve the high pressure ratio, the impeller rotates with the main shaft at a high speed, with a maximum speed of tens of thousands of revolutions, and a large load cycle is generated in a short time. Before assembly, the rotor needs to be dynamically balanced. After completion, it needs to be disassembled and assembled together with other parts. That is to say, the connection between the impeller and the main shaft must be concentric, and there is no slip and looseness between them when rotating, and the impeller and the main shaft should be detachably connected. [0003] In the prior art, th...

AI Technical Summary

Problems solved by technology

These kinds of matching connection methods require special tooling or assembly and disassembly by means of hydraulic pressure, heating and liquid nitrogen or dry ice refrigeration, resulting in poor maintainability, high maintenance costs, long time required for assembly and disassembly, etc. The level requirements are also higher

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