Axial flow fan with rotor blades and static front guide blades distributed in long-short staggered manner

Abstract

The invention discloses an axial flow fan with rotor blades and static front guide blades distributed in long-short staggered manner. The axial flow fan comprises a front air duct, an air cylinder, animpeller, a driving motor and a front mesh enclosure; the driving motor is installed on a motor installation plate of the front air duct; the front air duct supports the driving motor; the axial sizeof the front air duct is overlapped with that of the motor; the axial space of the front air duct is fully utilized, and the axial length of the axial flow fan is effectively shortened; meanwhile, air flowing through the front air duct flows through the outer surface of the driving motor to cool the driving motor, and the impeller is an axial flow type impeller and is installed at the shaft extension end of the driving motor; during work, the impeller rotates to generate negative pressure to suck in external air, and finally the external air is conveyed to a high-temperature brake resistancetape at the rear end to dissipate heat of the resistance tape; an integral flow channel structure consisting of the front air duct realizes the advantages of compact integral structure, strict axial size control and the like of the fan; in addition, the axial flow fan has the main characteristic that the output air pressure can achieve different pressures on all sections in the circumferential direction.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and in particular relates to an axial flow fan in which the lengths of rotor blades and stationary leading vanes are staggered. Background technique [0002] The present invention is applied to the circular braking resistor used for mining dump trucks, and its function is ventilation and heat dissipation of the braking resistor; the resistance band of the circular braking resistor is composed of multiple groups of fan-shaped braking resistor The moving resistor frames are arranged around the center and combined into a circular structure to form the entire circular braking resistor. The circular braking resistor needs to pass a large current when it is working, and the current generates a lot of heat on the resistance band, which needs to be cooled by a large-flow axial flow fan. Since the resistance bands in the fan-shaped resistance frame are radially distributed, this structure causes ...

AI Technical Summary

Problems solved by technology

In addition, the existing inventions "CN104033422A" and "CN10505043A" describe a design method and design case of long and short blades, but only the long and short blades are long and short in the chord direction of the blades, and the long and short blades are axially overlapping layouts, non-circumferential alternate layouts, It is also not designed to have the same long and short staggered leading vanes and its air duct structure

The performance and structure of each of the above-mentioned design cases can not solve the problems that need to be solved in the field of application of the present invention.

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