Axial flow enhanced type composite fan

Abstract

A fan case is designed by combining the principle of a compressor and rotational flow guiding, an axial flow fan is arranged at the upper end of the case, an outlet of a composite fan is formed in the lower wall of the case, air is sucked from the upper end along with rotation of the axial flow fan, airflow entering the case rotates along the inner wall of the case to be continuously accelerated to accumulate kinetic energy, and the airflow is screwed into the bottom along with the airflow. And in the process of continuously reducing the volume from top to bottom, the fluid is compressed and finally blown out of the fan along the tangent opening at the bottom. According to the design, fluid is compressed and accelerated to accumulate energy, and finally the energy is blown out from the bottom opening of the case, so that the wind power of the axial flow fan can be enhanced, and the breadth and angle of the fan can be changed by adjusting the size of the lower end opening. According to the film cleaning machine, the basic requirements for enhancing the wind power of the draught fan and blowing up residual films can be met, the wide working range can be achieved, the problems that soil and gravel mixed in film cleaning are much and are not prone to being removed, and follow-up film rolling is affected are further solved, and the film cleaning machine is very practical.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a method for enhancing the wind force of an axial flow fan and a corresponding axial flow enhanced composite fan. Background technique [0002] During the working process of the residual film recovery machine, the collected residual film contains a lot of soil and sand, so it is necessary to design a fan to meet the working requirements of the film separation. At present, there are various fans on the market, among which the centrifugal fan is widely used, but the separation of membrane impurities requires a larger angle, and the centrifugal fan cannot meet the corresponding requirements; the axial flow fan can provide a larger angle, but the same volume wind force is smaller. For this reason, it is urgent to design a composite fan, which can meet the wind force required for membrane impurity separation and have a wide angle to meet its work requirements for membrane impurit...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to propose a method for increasing the power of an axial flow fan, which overcomes the above-mentioned deficiencies in the prior art, can meet the basic requirements of enhancing the wind power of the fan, blowing up residual film, and can achieve a wider working range. It also further solves the problem that there are many mud and sand mixed in the cleaning film and it is not easy to remove, which affects the subsequent film roll

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