Wide flow range surge control turbocharger compressor

Abstract

The invention provides a wide flow range surge control turbocharger compressor which comprises a compressor casing and a compressor impeller, wherein an outer ring and an inner ring which are coaxial with the compressor impeller are arranged on the inner side of the compressor casing; a C-shaped circulation channel is formed between the outer ring and the inner ring; vanes are arranged at the end, away from the compressor impeller, of the C-shaped circulation channel; the back half part, where the C-shaped circulation channel vanes are positioned, of the C-shaped circulation channel forms a vaned diffuser inside the circulation channel; the front half part of the C-shaped circulation channel forms a vaneless diffuser inside circulation channel; the front edges of the C-shaped circulation channel vanes are positioned at the highest points of the C-shaped circulation channel; the rear edges of the C-shaped circulation channel vanes are flush with the outlet of the C-shaped circulation channel; and the meridian plane of the C-shaped circulation channel is divergent. Relative to the prior art, the wide flow range surge control turbocharger compressor has the advantages that a universal vaned diffuser is embedded in the cavity of the compressor casing, so that the treatment effect of the casing is optimized, and the casing can be widely applied to centrifugal compressors.

Description

technical field [0001] The invention belongs to the technical field of turbochargers, in particular to a turbocharger compressor with wide flow range surge control. Background technique [0002] In order to cooperate with the reciprocating working process of the internal combustion engine, the turbocharger compressor needs to work in a wide flow range. When the engine is running at low speed and high load, the flow rate of the compressor is small, and the pressure ratio of the compressor is relatively high, which causes the compressor to surge and cannot provide intake air for the engine. [0003] In the prior art, there are many ways to widen the flow range of the compressor, casing treatment is one of the simple and effective methods, such as figure 1 As shown, a channel is made at the inlet of the compressor casing, and the channel itself is communicated with the intake duct, and a circumferential groove is also processed to communicate with the channel and the impeller....

AI Technical Summary

Problems solved by technology

This patent has two disadvantages, one is that the vanes start from or near the groove of the C-shaped channel, and the other is that the meridian shape of the channel becomes tapered at the exit of the channel

Because the blades added in this patent are too close to the impeller, the flow velocity at the blade inlet is very high, so once the inlet angle of attack is wrong, it may cause large separation and affect the expansion and stability effect

Because different impellers have different flow conditions at the slots under different working conditions, the angle of attack of the air flow at the blade inlet is also different. Therefore, the blades under this patent must be optimized for each compressor, and there is no universal or universal structure, thus affecting the wide application of this patent in centrifugal compressors

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