Centrifugal compressor with inlet guide blades and turbocharger

Abstract

The invention discloses a centrifugal compressor with inlet guide blades and a turbocharger. The centrifugal compressor comprises a volute, an impeller and guide blades, wherein an air inlet channel, an impeller mounting space and an air outlet channel are defined in the volute, the impeller mounting space is respectively communicated with the air inlet channel and the air outlet channel, and the air inlet channel is provided with an air inlet and the air outlet channel is provided with an air outlet; the impeller can be rotationally arranged in the impeller mounting space by surrounding around a revolving shaft and is provided with a plurality of blades; and guide blades are arranged on a peripheral wall of the air inlet channel. According to the centrifugal compressor provided by the invention, the peripheral speed of fluid such as air in the air inlet channel is reduced by the fact that the guide blades are mounted, so that air inflows at the tips of the blades can be more uniform; and moreover, and the sudden change of the peripheral speed can be reduced, so that the increasing ranges of thermal charges at the tips of the blades can be reduced, the property of the centrifugal compressor can be further improved, especially, the property can be remarkably improved under the small flow working condition.

Description

technical field [0001] The invention relates to the technical field of impeller machinery, in particular to a centrifugal compressor and a turbocharger. Background technique [0002] The impeller compressor can be divided into two basic types: axial flow compressor and centrifugal compressor. The shape and flow characteristics of the axial flow compressor are suitable for use in multi-stage compression systems. Compared with the multi-stage axial flow compressor, the centrifugal compressor has a simple structure, smaller weight and volume, and can maintain high efficiency in a wide operating range. It is used in vehicles, ships, some industrial compressors and aviation compressors, etc. fields are widely used. [0003] Studies have shown that when the existing centrifugal compressor works at a small flow rate and is close to the surge point, the circumferential velocity of the gas at the center of the air inlet before the blade is small; while the circumferential velocity ...

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Problems solved by technology

[0003] Studies have shown that when the existing centrifugal compressor works at a small flow rate and is close to the surge point, the circumferential velocity of the gas at the center of the air inlet before the blade is relatively small; while the circumferential velocity near the wheel cover is relatively large, As a result, the circumferential velocity mutation at the compressor blade tip is relatively large, causing large losses and reducing the performance of the compressor

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