Low noise grain bin fan

CN122305050APending Publication Date: 2026-06-30TAIZHOU ZHONGSUI MECHANICAL & ELECTRICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAIZHOU ZHONGSUI MECHANICAL & ELECTRICAL CO LTD
Filing Date
2026-05-20
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing grain silo fans cannot adaptively adjust their noise reduction structure when airflow changes, making it difficult to effectively suppress airflow noise of different frequencies, resulting in serious noise pollution.

Method used

It employs a wind pressure assembly, an adjustable guide vane assembly, and an adaptive noise reduction unit. The angle of the guide vane assembly is adjusted by a wind pressure sensing plate and a torsion spring structure. Combined with a noise reduction cavity based on the Helmholtz resonance noise reduction principle, it achieves adaptive matching of airflow and wind pressure and dynamic adjustment of noise frequency band.

Benefits of technology

It significantly reduces the operating noise of grain silo fans, improves the noise reduction effect, adapts to different ventilation conditions, ensures the efficiency and stability of grain silo ventilation, and is suitable for long-term continuous operation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122305050A_ABST
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Abstract

This application relates to a low-noise grain storage fan, belonging to the technical field of grain storage equipment. The fan structure includes: a volute, an impeller, a drive shaft, a transmission assembly, and a drive motor; one end of the volute has an air outlet, and one side of the volute has an air inlet; the drive shaft is rotatably mounted inside the volute, and the impeller is fixedly mounted on the drive shaft inside the volute; one end of the drive shaft passes through the volute, and the other end is located outside the volute, with one end of the drive shaft connected to one end of the transmission assembly; the working end of the drive motor is connected to the other end of the transmission assembly, and the drive motor drives the drive shaft to rotate through the transmission assembly; a wind pressure assembly is rotatably mounted inside the volute; multiple sets of guide vane assemblies are rotatably mounted inside the air inlet; and a silencer unit is mounted outside the air outlet. This application has the technical effect of suppressing airflow noise of different frequencies by adjusting the noise reduction structure according to changes in airflow.
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