A new type of inducer wheel structure for a special pump body

By incorporating a novel inducer structure with a bushing and screw within the pump body, the problem of the inability of the inducer to reduce cavitation margin in existing technologies is solved, thereby improving the pump's anti-cavitation performance.

CN224515463UActive Publication Date: 2026-07-17大连帝国屏蔽电泵有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
大连帝国屏蔽电泵有限公司
Filing Date
2025-06-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, the inducer cannot effectively reduce the net positive suction head (NPSH) of special pump bodies, and cannot meet the requirements for improving the pump's anti-cavitation performance.

Method used

A novel inducer structure is designed by setting a bushing and a screw in the pump body, using the screw through hole and the bushing through hole to connect the internal circulation hole and the impeller inlet, blocking the inducer inlet, reducing the backflow of internal circulating liquid, and directly returning it to the impeller inlet, thus reducing mixing disturbance.

Benefits of technology

Without altering the original pump body structure, the net positive suction head (NPSH) is effectively reduced, thus improving the pump's cavitation resistance.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224515463U_ABST
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Abstract

The utility model discloses a new -type inducer structure of special pump body, including inducer, inducer and inducer are connected in sequence on pump shaft, and inducer includes shaft sleeve, and the outer periphery of shaft sleeve is equipped with blade, and the inside of shaft sleeve is inserted with screw rod, and one end of screw rod is connected with pump shaft, and the other end is installed on the shaft sleeve through fastener, and the one end of pump shaft is axially provided with circulating connecting hole to screw rod, and circulating connecting hole is communicated with the inner circulating hole of pump shaft, and screw rod is radially provided with screw rod through -hole, and screw rod through -hole is communicated with circulating connecting hole, and the shaft sleeve is radially provided with the shaft sleeve through -hole of corresponding communication with screw rod through -hole, and the shaft sleeve through -hole is communicated with the entrance of inducer, the utility model features are: through circulating connecting hole, screw rod through -hole, shaft sleeve through -hole communication inner circulating hole, inducer entrance, through the front end of screw rod and block inducer entrance, make inner circulating liquid not backflow to inducer entrance, directly backflow to inducer entrance, reduce inducer entrance mixed flow disturbance, reduce the cavitation margin of pump, improve the cavitation performance of pump.
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Claims

1. A new type of inducer wheel construction for a special pump body, characterized in that: The pump includes an inducer wheel housed within the pump body, which is sequentially connected to an impeller on a pump shaft. The inducer wheel includes a bushing with blades mounted on its outer circumference. A screw is inserted inside the bushing, with one end connected to the pump shaft and the other end mounted on the bushing via fasteners. The screw has an axially oriented circulation connection hole at one end of the pump shaft, which communicates with the inner circulation hole of the pump shaft. The screw also has a radially oriented screw through hole, which communicates with the circulation connection hole. The bushing has a radially oriented bushing through hole corresponding to and communicating with the screw through hole, which communicates with the impeller inlet.

2. A novel inducer wheel construction for a special pump body as claimed in claim 1, characterized in that: The bushing and impeller are connected to the pump shaft by a key.

3. A novel inducer wheel construction for a special pump body as claimed in claim 1, wherein: The other end of the screw is fastened to the bushing by a threaded nut, with the nut pressing against the bushing.

4. A new inducer wheel configuration for a special pump body as claimed in claim 1, characterized in that: The screw has at least two screw through holes evenly distributed, and each screw through hole corresponds to a coaxial bushing through hole.