Gear drive turbine compressor

Abstract

The gear drive turbine compressor of the invention has: a big gear (12) which is rotating by the drive of the external drive device, a small gear (14) rotating in high speed joggled with the big gear, an impeller (16) fixed on the small gear shaft (13) rotating in high speed taking the axial, a push-stopping ring (18) fixed on the small gear shaft supporting the lateral side of the big gear in sliding way or passing the shaft force of the small gear to the big gear, a push-stopping bearing (20) for bearing the shaft force on the big gear shaft, and a shaft moving quantity limiter (30) for limiting the shaft movement for the threshold value which is more than the small gear shaft (13).

Description

technical field [0001] The present invention relates to a gear driven turbo compressor which avoids excessive contact of the impeller with the casing. Background technique [0002] A gear-driven turbo compressor refers to a device that speeds up the rotation of a motor, engine, turbine, etc. with a gear speed increaser to drive a turbo compressor to rotate at a high speed. [0003] 1A-1C are schematic diagrams showing a conventional gear-driven turbo compressor. Fig. 1A is a front view, Fig. 1B is a sectional view along B-B direction thereof, and Fig. 1C is an enlarged view of part C thereof. [0004] In this example, the gear-driven turbo compressor 50 is a four-stage compressor, and four compressor impellers 51 sequentially compress the target gas to obtain high pressure. In FIG. 1B , the housing (compressor housing) surrounding the impeller and the gas flow path are omitted. [0005] In Fig. 1A, 52 is a large gear, and 53 is a small gear. The large gear 52 is driven to...

AI Technical Summary

Problems solved by technology

[0020] However, the rotational speed of the impeller 51 is as high as tens of thousands of revolutions per minute, and the moment of inertia of the large gear shaft is also very large, so even if the compressor has been stopped, it will take several seconds to several minutes to completely stop

Therefore, when the compressor is too late to stop, excessive contact between the impeller and the casing will occur, and there may be damage and overheating of the impeller and casing.

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