Centrifugal compressor with double pressure ratios

Abstract

The invention belongs to the field of compressors, and relates to a dual-pressure-ratio centrifugal compressor, which includes a rotor and a stator. The rotor consists of a main shaft and an impeller sleeved on the main shaft. Annular outlets with different radii, among them, the annular outlet with large radius is located at the end of the impeller blade, which is a high-pressure outlet, and the annular outlet with a small radius is located at a certain position from the top to the end of the impeller blade, which is a low-pressure outlet. The diffuser is connected with the low-pressure diffuser, and the high-pressure diffuser and the low-pressure diffuser are respectively connected with the high-pressure air collecting pipe and the low-pressure air collecting pipe. The invention adopts the design concept of setting two air outlets on one impeller, so that the single-stage centrifugal compressor can output two kinds of gases with different pressure ratios to meet the needs of different purposes. The effect of the double ducting of the engine.

Description

technical field [0001] The invention belongs to the field of compressors, and relates to a centrifugal compressor, in particular to a dual-pressure-ratio centrifugal compressor capable of simultaneously outputting two gases with different pressure ratios. Background technique [0002] Centrifugal compressors, also known as radial compressors, generally refer to turbo compressors whose airflow mainly flows along the radial direction. Centrifugal compressors with an exhaust pressure less than 0.2 MPa are generally called centrifugal blowers. Centrifugal compressors are widely used in aviation, metallurgy, chemical and other fields. [0003] Centrifugal compressors usually consist of rotors, stators and bearings. The impeller and other parts are set on the main shaft to form the rotor, which is supported on the bearing and driven by power to rotate at high speed. The stator includes components such as casing, partition, seal, air inlet chamber and volute chamber. Elements su...

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Problems solved by technology

[0004] At present, whether the centrifugal compressor is single-stage or multi-stage, each impeller has only one annular outlet, and there is only one diffuser corresponding to it, which can only output gas with one pressure ratio. For working machines or special occasions, it can only be satisfied by increasing the number of centrifugal compressors, which not only increases the cost, but also is limited by the environmental space, and the number of centrifugal compressors cannot be increased at will, which will affect it

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