Centrifugal compressor and turbocharger

By adopting asymmetrically designed blades in the bladed diffuser of the centrifugal compressor, the problem of great influence on the reaction of the airflow at the throat of the volute is solved, and the uniformity of the airflow and the efficiency of the compressor are improved.

CN222633507UActive Publication Date: 2025-03-18WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202421350176.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-13
Publication Date
2025-03-18
Estimated Expiration
2034-06-13

AI Technical Summary

Technical Problem

The throat of the volute has a great impact on the reaction of the air flow at the diffuser outlet, resulting in the air flow being different from other circumference positions, reducing the efficiency of the compressor.

Method used

A centrifugal compressor is designed, and the blades with the blade diffuser adopt an asymmetric design. The difference in the outlet angle and position center angle between the first blade and the second blade is within a certain range, reducing the loss of air flow injection and the impact of reaction.

Benefits of technology

Through the asymmetrical design of the blade, the incident loss of airflow entering the volute is reduced, the reaction effect at the throat is reduced, and the airflow is more uniform and smooth, thereby improving the boost pressure and efficiency.

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Abstract

The utility model relates to the technical field of air compressors, and discloses a centrifugal air compressor and a turbocharger, the centrifugal air compressor comprises a volute and a bladed diffuser fixedly arranged in the volute, the bladed diffuser comprises an annular diffuser body, a first blade and a plurality of second blades, and the first blade and the second blades are fixedly arranged on the surface of one side of the diffuser body respectively. The outlet angles and the inlet angles of the second blades are equal, and the central angles of the positions of the second blades are equal; the distance between the first blade and the throat of the volute is smaller than the distance between each second blade and the throat of the volute, and the first blade meets at least one of the following conditions: the absolute value of the difference value between the outlet angle of the first blade and the outlet angle of each second blade is greater than or equal to 1 degree and less than or equal to 5 degrees; the absolute value of the difference value of the position central angle of the first blade and the position central angle of the second blade is larger than 0 and smaller than or equal to 3 degrees. According to the centrifugal compressor, the problem that the efficiency of the compressor is reduced due to the fact that the reaction influence of the throat of the volute on the air flow at the outlet of the diffuser is large is solved.
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