A ring hoop type closed impeller

Through the mechanical processing and manufacturing of hoop closed impellers, the problem of tip leakage flow in small-power centrifugal compressors is solved, efficiency and surge margin are improved, high-precision and high-strength impeller connection are achieved, and the performance of small-power centrifugal compressors is improved.

CN116517878BActive Publication Date: 2025-07-25SINO-BROOK NEW ENERGY TECH (SHANGHAI) CO LTD
2 Cites 0 Cited by

Patent Information

Application Number
CN202310417458.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-18
Publication Date
2025-07-25
Estimated Expiration
2043-04-18

AI Technical Summary

Technical Problem

In existing small-power centrifugal compressors, the large tip gap of the open impeller leads to serious leakage flow, low efficiency, insufficient surge margin, and insufficient accuracy and surface finish of the existing closed impeller, which affects efficiency and surge margin.

Method used

The hoop type closed impeller is used to manufacture wheel covers, hoops and impellers by mechanical processing, and the hoops are used to connect the wheel covers and impellers to enhance the connection strength and accuracy. The machining and laser cutting molding are used to improve the accuracy and roughness of the parts.

Benefits of technology

The efficiency and surge margin of closed impellers are significantly improved, and the assembly qualification rate of parts is improved. Compared with traditional open impellers and gypsum die-cast closed impellers, the efficiency and surge margin are significantly improved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention relates to the technical field of centrifugal compressors, and provides a hoop-type closed impeller, comprising: a shroud; an impeller, which is connected to the shroud through a hoop; and a hoop, which comprises: a shroud-side curled edge, which is connected to the shroud; an impeller-side curled edge, which is connected to the impeller; and a curled-edge connecting portion, which connects the shroud-side curled edge and the impeller-side curled edge. All the shroud, the hoop and the impeller of the present invention can be formed by machining, so the accuracy and roughness of the parts will be significantly better than those of traditional plaster die-castings. The strength of the closed impeller is sufficient to withstand the same rotational speed as that of the traditional open impeller, and the efficiency and surge margin are greatly improved compared with the traditional open impeller. In addition, compared with the closed impeller made by plaster die-casting, the efficiency and surge margin will also be significantly improved due to the improved accuracy and roughness.
Need to check novelty before this filing date? Find Prior Art