Expansion transformation moving blade modification design method for power station moving blade adjustable axial flow fan

Abstract

The invention discloses a power station movable blade adjustable axial flow fan capacity expansion transformation movable blade modification design method which comprises the steps that firstly, application conditions of the method are given; secondly, if the fan expansion transformation meets the application conditions, a specific two-dimensional blade profile modeling method for the fan expansion transformation movable blade modification design is provided; and finally, according to the two-dimensional blade profile curve generated by the moving blade modification design two-dimensional blade profile modeling method, completing moving blade modification design three-dimensional blade modeling. According to the invention, on the premise of keeping most parts of the fan unchanged, the fan can be expanded and transformed only by carrying out remodeling design on the movable blades of the fan, and safe and reliable operation of the fan is ensured. A new technical route is provided for capacity expansion, upgrading and reconstruction of the movable blade adjustable axial flow fan of the power station under the new situation, and the method has the advantages of being low in investment cost, short in investment recovery age limit, remarkable in reconstruction effect and the like and is suitable for large-scale application and popularization in the market.

Description

technical field [0001] The invention relates to the technical field of coal-fired power plants, and in particular relates to a design method for the remodeling of moving blades of a power station's movable blade-adjustable axial-flow fan through capacity expansion and modification. Background technique [0002] At present, various types of thermal power units with adjustable moving blade axial flow fans are the most widely used in the country. If there are problems such as insufficient output and low stall margin of the adjustable moving blade axial flow fan, it is necessary to expand the fan capacity and improve the output of the fan. In order to meet the output requirements of the air and smoke system of the unit. At present, the adjustable-blade axial flow fan is undergoing capacity expansion transformation. In most cases, the whole fan replacement scheme is adopted, which not only has a huge investment cost and a long recovery period, but also makes it difficult to imple...

AI Technical Summary

Problems solved by technology

At present, the axial flow fans with adjustable movable blades are expanded and transformed. In most cases, the complete fan replacement plan is adopted. This not only requires huge investment costs and long payback periods, but also makes it difficult to implement fan capacity expansion and transformation due to the small number of fan manufacturers.

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