An axial centrifugal fan

Abstract

The invention provides an axial centrifugal fan, which includes a cylindrical casing, an air inlet at the axial front end of the casing and an air outlet at the axial rear end, and the air outlets arranged in sequence from the axial front end to the rear end of the casing. The air inlet collector, the centrifugal impeller and the motor support cylinder, the motor arranged in the motor support cylinder, the windshield ring arranged radially between the casing and the centrifugal impeller, and the radially arranged between the casing and the motor support The guide vanes between the barrels; the centrifugal impeller includes a hub connected to the motor shaft and front discs, blades and rear discs arranged in sequence from the axial front end to the rear end, and the rear disc includes the first The arc-shaped body, the wind-shielding ring includes a second arc-shaped body, and the outer bending directions of the first arc-shaped body and the second arc-shaped body are both directions that facilitate the flow of gas to the air outlet. The fan provided by the invention has the characteristics of small size, easy installation, low noise, air volume and pressure can be designed according to requirements, and high operating efficiency.

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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