Pressurizing energy-saving centrifugal fan

By using a mechanical transmission system designed to drive the impeller frame and bevel gears through a drive motor, combined with friction plates and a ring rack, the automatic adjustment and energy recovery of the centrifugal fan inlet are realized. This solves the problem that the air volume of traditional centrifugal fans cannot be adjusted in real time, thereby improving fan efficiency and reducing energy consumption.

CN121363542AInactive Publication Date: 2026-01-20ZHEJIANG OUDEN FAN CO LTD
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Patent Information

Application Number
CN202511687698.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-01-20
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Traditional centrifugal fans rely on manual or simple mechanical dampers for air intake adjustment, which cannot be adjusted in real time according to the actual operating conditions of the fan. As a result, the air intake cannot reach the optimal state under different operating conditions, affecting the efficiency and performance of the fan.

Method used

The system employs a drive motor to drive the impeller frame in conjunction with a bevel gear, combined with a mechanical transmission system consisting of friction plates, circular gears, and a ring rack. This enables automatic adjustment of the air inlet size of the air inlet pipe. Limit blocks and return springs ensure stable adjustment of the guide plate. A turbine generator is used to recover and store airflow energy.

Benefits of technology

It achieves real-time optimization of air intake and air pressure, reduces turbulence loss, improves fan efficiency and performance, reduces manual intervention and maintenance costs, and reduces overall energy consumption through an energy recovery system.

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Abstract

The invention relates to the technical field of gas machinery, and discloses a pressurizing energy-saving centrifugal fan which comprises a limiting ring, a driving motor is fixedly connected into the limiting ring, an impeller frame is fixedly arranged at the output end of the driving motor, and fan blades are arranged in the impeller frame. A protection assembly and a transmission assembly are arranged on the outer wall of the impeller frame, a friction plate is fixedly connected to the outer wall of the transmission assembly, a circular gear is arranged on the outer wall of the friction plate, an annular rack is connected to the tooth end of the circular gear in a meshed mode, and a connecting frame is fixedly connected to the outer wall of the annular rack. Through the linkage design that a driving motor drives an impeller frame to be in linkage with a first bevel gear and a second bevel gear, in combination with mechanical transmission of a friction plate, a circular gear and an annular rack, automatic adjustment of the size of an air inlet of an air inlet pipe is achieved, opening and closing of a flow guide plate can be adjusted in real time according to the rotating speed of an impeller, the air inlet amount and air pressure are optimized, and turbulence losses are effectively reduced; and the working efficiency and performance of the fan are improved.
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