High total pressure large-flow wheel disk side beveling type back-ward impeller fan

Abstract

The invention discloses a high total pressure large-flow wheel disk side beveling type back-ward impeller fan, belonging to the technical field of fans. The fan is characterized by being composed of an angle iron flange, a wind scooper, an air intake barrel, a rotor cap, an impeller, the outer barrel of an air outlet barrel, the inner barrel of the air outlet barrel, a guide vane, a motor, a bracket and the like, wherein the inlet of the fan is provided with the wind scooper and extends into the inlet part of the impeller; the hub of the impeller is additionally provided with the rotor cap; the outlet of the impeller, i.e. the edge of the wheel disk, adopts a bevelling structure, and the impeller vane has two types of linear type and circular arc type; the joint assembly point of the air intake barrel and the air outlet barrel of the impeller, i.e. the wheel cover side of the impeller outlet, is provided with the baffle; the isopachous guide vane is welded between the inner barrel of the air outlet barrel and the outer barrel of the air outlet barrel; the side of the inner barrel and outer barrel of the air outlet barrel, which is near the wheel disk of the impeller, is opened; and the air outlet of the fan is divided into a main runner air outlet and a motor cooling flow air outlet. The invention not only satisfies the requirements of high total pressure and large flow operation of the cooling fan but also improves the air flowing situation in the fan to lower flowing loss and noise.

Description

technical field [0001] The invention belongs to the technical field of ventilators, and relates to a high-full-pressure, high-flow, disc-side oblique-cut type backward-curved impeller ventilator, which is applied to high-pressure, high-flow cooling and ventilation of locomotive traction motors and related equipment. Background technique [0002] The traction motor of the EMU locomotive has the characteristics of high power and many heating electrical components. With the increase of the train speed, the negative pressure on the train surface increases. At this time, the pressure head required by the original locomotive cooling fan increases, and the cooling flow will decrease. , when the situation is serious, the heating components of the EMU, such as electrical equipment, will be overheated and damaged, which requires the matching cooling fan to have the characteristics of large flow and high total pressure; The space occupied by the fan restricts the working capacity of th...

AI Technical Summary

Problems solved by technology

Although the general axial flow fan meets the requirements of axial exhaust, its pressure head is low and it is difficult to meet the requirements; while the centrifugal fan has the characteristics of high total pressure coefficient and large flow coefficient, but the centrifugal fan has the characteristics of high flow rate operating point. The operating efficiency is low, the volume of the fan is large, and the radial exhaust of the centrifugal fan does not meet the requirements. All these require a new design and innovation of the centrifugal fan to further improve its performance, reduce its energy consumption, and meet the cooling requirements of the EMU.

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