Impeller with adjustable moving blades

By designing the adjustable impeller of the moving blade and adjusting the blade installation angle using the angle adjustment component, the surge problems caused by the large weight, severe imbalance and different system resistance of the axial flow fan in the cooling tower are solved, and the fan is efficient and low failure rate is achieved.

CN119687031APending Publication Date: 2025-03-25HUNAN LIANCHENG TRACK EQUIP CO LTD
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Patent Information

Application Number
CN202510129702.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-05
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The impeller weight of the axial flow fan in the existing cooling tower is large and has severe imbalance, resulting in large starting torque, large vibration and high failure rate; at the same time, the system resistance of different cooling towers is different, resulting in worsening of the flow conditions of the non-working surface of the blade, resulting in boundary layer separation and stalling, causing the fan to surge.

Method used

A moving blade adjustable impeller is designed, including a roulette, a wheel core, a blade and an angle adjustment assembly. The blades are evenly arranged on the outer periphery of the roulette through the angle adjustment assembly, which can adjust the installation angle and adapt to the system resistance requirements of different cooling towers.

Benefits of technology

By adjusting the installation angle of the blades, it can meet the different performance requirements of cooling towers of different models, reduce the weight of the fan, reduce the load and temperature rise of the motor bearings, extend the bearing life, and reduce the fan failure rate.

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Abstract

The invention relates to the technical field of fans, and discloses a movable blade adjustable impeller which comprises an impeller disc, an impeller core, blades and an angle adjusting assembly. The blades are evenly arranged on the periphery of the wheel disc through the angle adjusting assembly, and the installation angle between the blades and the wheel disc is adjusted through the angle adjusting assembly. A wheel core is arranged in the center of the wheel disc and connected with a rotating shaft of the driving motor. According to the high-strength, light-weight and environment-friendly non-metal movable blade adjustable impeller, on one hand, different angle adjusting assemblies can be replaced according to system resistance, so that the mounting angles of the blades are adjusted, and different performance requirements of cooling towers of different vehicle types can be met; and on the other hand, the weight is greatly reduced, the load and temperature rise of a motor bearing are improved, the service life of the bearing is prolonged by 10%-15%, and the failure rate of the fan is greatly reduced.
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