A Mechanical Device for Immediately Adjusting the Installing Angle of Guide Vane

Abstract

The invention relates to a mechanical device for immediately adjusting an installing angle of a guide vane. The mechanical device can immediately play optimum performance under the different working conditions and has the advantages of being capable of saving effort in adjustment and convenient to user. According to the technical scheme, the mechanical device for immediately adjusting the installing angle of the guide vane comprises a guide vane hub located at the upstream position of a box, coaxial with the box and arranged in a fan housing and a plurality of guide vane blades evenly distributed on the outer circumferential face of the guide vane hub along the circumference and is characterized in that the guide vane blades are respectively and rotatably hinged to the outer circumferential face of the guide vane hub, an adjusting mechanism drives and controls rotating angles of the guide vane blades and comprises prism adjusting shafts capable of moving along the axis of the fan housing and provided with side prisms identical to the guide vane blades in number, groove block matching structures converting movements of the prism adjusting shafts into rotation of the guide vane blades around the hinge axis and an adjusting motor exerting axial thrust on the prism adjusting shafts.

Description

technical field [0001] The invention belongs to the technical field of fluid control, in particular to a mechanical device for instantly adjusting the installation angle of guide vanes. Background technique [0002] Rotating machinery is widely used in sectors such as electric power, petrochemical, metallurgy and aerospace. Taking the axial flow fan as an example, for fans with small hubs or low power, one impeller is often used instead of guide vanes. This scheme is widely used because of its simple structure and convenient manufacture. In some occasions with higher requirements, it is also necessary to install guide vanes on the axial flow fan to improve the overall performance of the fan. Among them, the front guide vane causes the airflow to produce negative pre-swirl before entering the impeller, which can change the air volume, wind pressure, and improve the adjustment efficiency of the fan; the rear guide vane rotates the direction of the airflow flowing out of the ...

AI Technical Summary

Problems solved by technology

However, rotating machinery often needs to work under different working conditions, which makes the fixed guide vane installation angle may not be the best value

If you want to change the installation angle of the guide vane, you usually need to stop the machine and replace the guide vane with the matching installation angle. This is not only time-consuming and laborious, but also a kind of wear and tear on the machine itself.

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