Device for adjusting moving blades of axial flow fan

Abstract

A device for adjusting moving blades of an axial flow fan is mainly composed of the moving blades, transmission parts, a hub, a hydraulic transmission system and a control panel. The device is characterized in that the transmission parts penetrate through blade installing shaft holes in the hub to be connected with the moving blades in a locking mode through high-strength bolts; the transmission parts are characterized in that corresponding transmission shafts are sequentially sleeved with second single-row radial ball bearings, first single direction thrust ball bearings, second single direction thrust ball bearings, bearing pressing sleeves, round nuts, connecting rod bodies, shaft circlips and first single-row radial ball bearings, rotating shafts are installed on the connecting rod bodies and locked by hexagon thin nuts, and third single-row radial ball bearings are installed on the rotating shafts; an inner core of the hub is sleeved with the control panel, and the third single-row radial ball bearings drop between the control panel and pressing plates; the control panel is connected with the hydraulic transmission system. The device for adjusting the moving blades of the axial flow fan is simple in structure, low in cost, and flexible to adjust, and whole rotational inertia of impellers is small.

Description

technical field [0001] The invention relates to the technical fields of electric power and iron and steel industry, and is especially suitable for various large-scale axial flow fan impeller blades to adjust the flow pressure. Background technique [0002] With the development of the economy, energy conservation and environmental protection have become the mainstream. The impeller blades and the hub of the generally used axial flow fan are relatively static structures. The air volume and pressure adjustment of the industrial system can only be adjusted by the front guide vane when the industrial system is running. When the airflow direction does not match the impeller inlet angle, the adjustment efficiency is very low. Low. At the same time, there is also a structure with adjustable moving blades in China, but it is not mature enough, the adjustment process is not flexible, the structure of the transmission part is complicated, and the processing technology is too complicat...

AI Technical Summary

Problems solved by technology

The impeller blades and the hub of the generally used axial flow fan are relatively static structures. The air volume and pressure adjustment of the industrial system can only be adjusted by the front guide vane when the industrial system is running. When the airflow direction does not match the impeller inlet angle, the adjustment efficiency is very low. Low

At the same time, there is also a structure with adjustable moving blades in China, but it is not mature enough, the adjustment process is not flexible, the structure of the transmission part is complicated, and the processing technology is too complicated. After the successful production, the overall structure of the impeller is heavy and the moment of inertia is large. Maintenance and replacement parts expensive

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