A stabilizing device for a centrifugal compressor

Abstract

Disclosed is a centrifugal compressor stability enhancement device. The device is an external device, two sides of the device are provided with a first flange (10) and a second flange (20) which are respectively used to be seamlessly connected to a front cover plate (1) of a centrifugal compressor and a suction pipeline, the first flange and the second flange are arranged in parallel, and a main flow pipeline (30) which is perpendicular to the flanges is arranged between the two flanges; and the main flow pipeline communicates with an air intake pipeline (40) through which external air is supplied. The main flow pipeline is provided with a plurality of jet holes (301) along the circumferential direction of the inner wall surface thereof, an air gathering cavity (303) is arranged on the outer wall surfaces of the jet holes, and the air gathering cavity is provided with an interface which communicates with the air intake pipeline; external compressed airflow enters the air gathering cavity from the air intake pipeline, and enters the main flow pipeline of the compressor via the jet holes arranged circumferentially, such that the air is radially introduced, and is jetted out in the tangential direction of the inner surface of the flow passage. The centrifugal compressor stability enhancement device is simple in structure, is convenient to mount and dismount, and can effectively broaden the operating margin of the centrifugal compressor.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to a centrifugal compressor stabilization device. Background technique [0002] As a kind of fluid machinery, centrifugal compressor is widely used in oil refining, chemical industry, metallurgy, refrigeration and air conditioning and other fields. The centrifugal compressor has a certain stable working range. When the compressor operates in an unstable working condition, the performance will be greatly deteriorated, which may further cause the compressor to stall and surge, and even cause the machine to fail to work normally, eventually causing major accidents. Therefore, the development trend of the centrifugal compressor requires it to have a wider working range. [0003] Aiming at the characteristic of centrifugal compressor's stable working range, researchers have conducted many studies, such as expanding its stable working range through compressor inlet guide ...

AI Technical Summary

Problems solved by technology

With the self-priming structure of the original centrifugal compressor, the energy injected into the main flow is not enough to improve the internal flow conditions as much as possible, and the stability expansion ability is limited; Chinese patent document CN 101660543A discloses a method for expanding the stability of the passive jet of the rotor blade tip , through the modification of the fan / compressor casing, a local acceleration zone is formed at the leading edge of the rotor tip, so as to achieve an effect similar to that of the rotor tip jet. Although it is easier to achieve in terms of structure, due to its overall structure It will not change after manufacture, because the passage structure itself is always in the open state after the manufacture, and it will also change the internal flow of the compressor under the stable working condition of the compressor, especially when it is running under various complex working conditions. The phenomenon is particularly serious, often resulting in a large decline in compressor performance; Chinese patent document CN 103953560 A discloses a compressor stability expansion system and a compressor mechanism applied to the system. Holes, arrangement of gas collection chamber, complex processing and production, not conducive to popularization and application

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