Ventilation grille, inlet air filtering device and traction motor cooling system for rail transit

Abstract

The invention relates to the technical field of ventilation opening and provides a ventilation grille, an inlet air filtering device and a traction motor cooling system for rail transit, wherein the ventilation grille comprises a plurality of grille bars; the grille bars comprise first stopping plates, second stopping plates and connecting plates; the first stopping plates are positioned on the external sides of the connecting plates and the top ends of the first stopping plates are connected with the connecting plates; the second stopping plates are positioned on the internal sides of the connecting plates and the bottom ends of the second stopping plates are connected with the connecting plates; and the bottom end of the first stopping plate of the grille bar on the upside is not higherthan the top end of the second stopping plate of the grille bar on the downside. The ventilation grille has the advantages that the grille bars occupy small area, the ventilation quantities of the grille bars are large and the wind resistances of the grille bars are small. And moreover, on the basis of controlling the area of an air inlet, the gaps between the adjacent connecting plates can be made larger to reduce the air speed so as to control noises. Except for these advantages, the ventilation grille also has the advantage that the position relationships of the adjacent grille bars form aspecial air duct to guarantee that impurities are not easy to pass through the ventilation grille to enter in an air inlet passage.

Description

technical field [0001] The invention relates to the technical field of air vents, in particular to a ventilation grille, an air intake filter device and a traction motor cooling system for rail transit. Background technique [0002] Taking a certain type of subway as an example, in the design process of its traction motor cooling system and APS equipment cooling system, it is necessary to set up a filter structure at the vent to filter the cooling air. [0003] The most common filtering structure in the prior art is to set several "V"-shaped grille bars at the air inlet, so as to filter impurities in the air through the "V"-shaped grille bars. [0004] However, the problem with this kind of filtering structure is that the grille itself occupies a large area, resulting in a small amount of ventilation. Moreover, the wind resistance of the "V"-shaped grille is large. In addition, in order to control the air intake area of ​​the air inlet, the gap between the grill bars is of...

AI Technical Summary

Problems solved by technology

[0006] One of the objectives of the present invention is to provide a ventilation grille, an air intake filter device and a traction motor cooling system for rail transit, which solve the problems of small ventilation, large wind resistance, large noise and poor filtering effect in the prior art. question

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