Axial centrifugal fan

Abstract

The invention provides an axial centrifugal fan. The axial centrifugal fan comprises a cylindrical machine case, an air inlet, an air outlet, an inlet air collector, a centrifugal impeller, a motor supporting cylinder, a motor, an air baffle ring and a guide vane, wherein the air inlet is formed in the axial front end of the machine case, the air outlet is formed in the axial tail end of the machine case, the inlet air collector, the centrifugal impeller and the motor supporting cylinder are sequentially arranged in the machine case from the axial front end to the axial tail end, the motor is arranged in the motor supporting cylinder, the air baffle ring is arranged between the machine case and the centrifugal impeller in the radial direction, and the guide vane is arranged between the machine case and the motor supporting cylinder in the radial direction. The centrifugal impeller comprises a hub, a front wheel disk, blades and a rear wheel disk, wherein the hub is connected to a main shaft of the motor, and the front wheel disk, the blades and the rear wheel disk are sequentially arranged from the axial front end to the axial tail end. The rear wheel disk comprises a first arc-shaped body. The air baffle ring comprises a second arc-shaped body. The first arc-shaped body and the second arc-shaped body are both bent towards the direction along which gas flows to the air outlet easily in appearance. The axial centrifugal fan has the advantages that the size is small, installation is convenient, the noise is low, the air volume and the pressure can be designed according to needs and the operation efficiency is high.

Description

technical field [0001] The invention belongs to the field of fluid machinery, in particular to a high-efficiency axial centrifugal fan for traction motors of locomotives. Background technique [0002] The traction motor is a key component of locomotive operation. When the traction motor is working, the internal winding of the motor generates a lot of heat. In order to prevent the traction motor from overheating and damage and ensure the normal operation of the EMU, a fan is required to force the traction motor to dissipate heat. The fan is an indispensable part of the traction system. In addition, since the cooling fan of the traction motor is installed on the front of the locomotive, next to the driver's cab, in order to reduce the noise of the locomotive mechanical cabin and avoid affecting the driver's work and health, the noise of the fan must be reduced as much as possible, and the noise must be controlled below 80dB; Due to the space limitation of the mechanical cabi...

AI Technical Summary

Problems solved by technology

Its disadvantages are: its air inlet and outlet are arranged at 90°, its installation position is relatively large and the air duct is not arranged on the same axis

However, the internal structure of the fan has not been carefully designed and optimized, so that the maximum efficiency of the fan can only reach about 55%.

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