Axial flow fan capable of achieving accurate zero clearance

Abstract

The invention discloses an axial flow fan capable of achieving an accurate zero clearance. The axial flow fan comprises an impeller, a wind barrel and a motor, wherein the impeller comprises a hub connected to an output shaft of the motor, and a plurality of blades uniformly distributed on the peripheral surface of the hub; wingtips of the blades are provided with wingtip partitions; a current collector is arranged on an air inlet flange of the wind barrel; and the ends, facing the current collector, of the wingtip partitions stretch into the place between the current collector and the inner wall of the wind barrel. According to the axial flow fan, a combination of the wingtip partitions and the current collector is adopted, a zero clearance is formed between the impeller tip and the innerwall of the wind barrel, the functions of reducing noise, increasing pressure, reducing flow loss, improving device reliability and prolonging the operation life cycle of the device are achieved, operation pressure of the device is increased, blade vibration is reduced, the service life of the impeller is prolonged, the surge problem is solved, and the operation working area of the device is expanded.

Description

technical field [0001] The invention relates to an axial flow fan model, in particular to a quasi-zero gap model between an impeller and an air cylinder in an axial flow fan. Background technique [0002] The axial flow fan is composed of impeller, motor and fan cylinder. As a rotating part, the impeller has a certain gap with the inner wall of the fan cylinder. The larger the gap, the lower the efficiency of the fan, the greater the noise, and the air volume and pressure. The lower it is, when the speed is high, the blades on the impeller will have a certain amount of deformation, which will aggravate the deterioration of the overall performance of the fan. With the rapid development of my country's economy and industry, there is an urgent need for a high-efficiency and low-noise axial flow fan to be applied to various ventilation and fire-fighting occasions. Contents of the invention [0003] In order to overcome the above defects, the present invention aims to provide ...

AI Technical Summary

Problems solved by technology

[0002] The axial flow fan is composed of impeller, motor and fan cylinder. As a rotating part, the impeller has a certain gap with the inner wall of the fan cylinder. The larger the gap, the lower the efficiency of the fan, the greater the noise, and the air volume and pressure. The lower the speed is, when the speed is high, the blades on the impeller will have a certain amount of deformation, which will aggravate the deterioration of the overall performance of the fan.

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