Air duct structure of forced air cooling brake resistor

Abstract

The utility model relates to an air duct structure of a forced air cooling brake resistor. The air duct structure is arranged on a resistor box body, the resistor box body comprises a box body air duct and a resistor element arranged in the box body air duct, and the air duct structure comprises a conical air guide device, a fan, an air inlet mesh enclosure and an air outlet shell arranged at the outlet end of the box body air duct which are sequentially connected with the inlet end of the box body air duct; the air inlet mesh enclosure is a cuboid mesh enclosure, a fan receding hole is formed in one side of the air inlet mesh enclosure, and fan blades of the fan are rotationally arranged at the fan receding hole. Compared with the prior art, the air duct structure enables air flow to be evenly distributed in the air duct of the box body, prevents the air flow from generating a blind area in the air duct and causing local over-temperature of a brake resistor, can effectively reduce the adverse effect of walking wind generated when a train travels on heat dissipation of the resistor, and improves heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of brake resistance air cooling technology relates to a kind of forced air cooling brake resistance air duct structure, specifically relates to a kind of forced air cooling brake resistance air duct structure on rail transit subway vehicle. BACKGROUND

[0002] At present, the commonly used resistance box cooling mode is natural convection cooling, in the process of train operation, a large part of the generated air volume is used for other functions, such as air cylinder, air spring, etc., and a part is released to the outside of the car at the ventilation window on the roof, in this case, only a small amount of remaining air volume inside the car will have a cooling effect on the resistance box. But because this heat dissipation mode does not consider the air distribution near the resistance box, the temperature near the resistance box is relatively high, and even cannot work normally, and at the same time, due to the small amount of air flowing through the resistance box, or sometimes the problem of uneven air distribution in the air duct is encountered, the blind area of air flow is generated in the air duct, causing local overheating of the resistance element, and it is difficult to achieve good heat dissipation effect. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a kind of forced air cooling brake resistance air duct structure, specifically providing a kind of forced air cooling brake resistance air duct structure on rail transit subway vehicle, to solve the problem that blind area of air flow is generated in the air duct, causing local overheating of the resistance element, and the running wind generated when train travels flows into the resistance air duct, thereby causing poor heat dissipation of resistance.

[0004] The utility model can be realized by the following technical solutions:

[0005] The utility model provides a kind of forced air cooling brake resistance air duct structure, is located on resistance box body, the resistance box body includes box air duct and the resistance element in box air duct, and its characterized in that, the air duct structure includes the taper air guide device, fan, air inlet mesh cover and the air outlet shell in box air duct export end connected in turn with box air duct import end, the air inlet mesh cover is cuboid mesh cover, the air inlet mesh cover is set with fan accommodation hole on one side, and the fan blade rotation is set at the fan accommodation hole.

[0006] Further, the box air duct is located inside the resistance box body, and is fixed on the resistance box body by bolt or rivet.

[0007] Further, the air inlet mesh cover is cuboid mesh cover or square mesh cover.

[0008] Further, the conical air guide device comprises a first support plate and a second support plate arranged orthogonally, and an inner air guide plate and an outer air guide plate arranged side by side between the adjacent ends of the first support plate and the second support plate; the inner air guide plate is inclined inward along the airflow direction, and a plurality of inner air guide plates are connected in sequence to form a converging air guide channel; the outer air guide plate is inclined outward along the airflow direction. After the fan inhales air from the outside, the air is evenly distributed in the air guide channel after being rectified by the inner air guide plate and the outer air guide plate, and then flows to the air outlet, that is, the conical air guide device makes the airflow evenly distributed in the air guide channel of the box body, avoiding the blind area of the airflow in the air guide channel and causing local overheating of the resistance element.

[0009] Further, the first support plate, the second support plate, the inner air guide plate and the outer air guide plate form the conical air guide device through riveting, and the conical air guide device is fixed in the resistance box body through bolts.

[0010] Further, the inner air guide plate comprises a first inner air guide plate, a second inner air guide plate, a third inner air guide plate and a fourth inner air guide plate, the outer air guide plate comprises a first outer air guide plate, a second outer air guide plate, a third outer air guide plate and a fourth outer air guide plate, the first support plate and the second support plate orthogonally form a first region, a second region, a third region and a fourth region, the first inner air guide plate, the second inner air guide plate, the third inner air guide plate and the fourth inner air guide plate are respectively located in the first region, the second region, the third region and the fourth region, and are connected to the ends of the first support plate and the second support plate, the first outer air guide plate, the second outer air guide plate, the third outer air guide plate and the fourth outer air guide plate are respectively located in the first region, the second region, the third region and the fourth region, and the two ends of the first outer air guide plate and the third outer air guide plate are respectively connected to the ends of the first support plate and the second support plate, and the second outer air guide plate and the fourth outer air guide plate are connected to the ends of the second support plate.

[0011] Further, a first groove is formed on the first inner air guide plate near the side of the first support plate, a second groove is formed on the third inner air guide plate near the side of the first support plate, and a third groove is formed on the fourth inner air guide plate near the side of the second support plate.

[0012] Further, a vertical plate is arranged in the second region, one end of the vertical plate is connected to the orthogonal position of the first support plate and the second support plate, and the other end is connected to the middle part of the second inner air guide plate.

[0013] Further, the ends of the first support plate and the second support plate are provided with supports connected to the resistance box body.

[0014] Further, each surface of the air inlet mesh cover is provided with a mesh hole. When the front surface of the air inlet mesh cover is blocked by foreign matter, the fan can inhale air from the remaining five surfaces to dissipate heat for the resistance.

[0015] Further, the size of the grid hole is 113 mm x 27 mm. The protection level meets IP20, and foreign matters with a diameter greater than 12.5 mm are prevented from entering the resistance air duct, thereby protecting the resistance air duct.

[0016] Further, the box air duct is a mica plate air duct. The mica plate is a heat insulation material, and can avoid the heat inside the air duct from affecting the resistance.

[0017] Further, the air outlet shell comprises fan-shaped plates arranged side by side, first and second arc-shaped plates arranged side by side and in gap cooperation between the arc edges of the fan-shaped plates, and first and second flow guide plates arranged outward along the center of the fan-shaped plates in sequence, wherein the first and second flow guide plates are arc-shaped plates; one edge of the fan-shaped plate is connected with the outlet end of the box air duct, and the other edge forms a gas outlet together with the first arc-shaped plate.

[0018] Further, the first and second arc-shaped plates are in gap cooperation to form a double-layer structure, the hot air discharged from the inside of the resistance directly contacts the second arc-shaped plate and does not contact the first arc-shaped plate, so that the temperature of the first arc-shaped plate can be effectively reduced, thereby reducing the air temperature above the resistance air outlet shell and reducing the influence of high temperature on the equipment above the resistance.

[0019] Further, the air duct structure is arranged on the resistance box of a subway vehicle, and the gas outlet is parallel to the rail surface of the subway vehicle.

[0020] Further, the air duct structure can effectively reduce the influence of the shape wind generated when the subway vehicle (train) travels on the resistance heat dissipation, and improve the heat dissipation efficiency.

[0021] The working principle of the air duct structure in the utility model is as follows:

[0022] The fan of the resistance sucks the external air into the air duct, and the air flow is uniformly distributed in the air duct through the rectification of the conical air guide device, so that the resistance unit in the air duct can be fully contacted with the air, and the overheating caused by the uneven air flow in the air duct is avoided. After the air flow exchanges heat with the resistance unit, the hot air is discharged from the air outlet shell, the opening direction of the air outlet shell is parallel to the rail surface, and the shape wind generated when the train travels can be avoided from flowing back into the air duct, thereby affecting the resistance heat dissipation.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1) The air duct structure can effectively reduce the influence of the shape wind generated when the train travels on the resistance heat dissipation, and improve the heat dissipation efficiency.

[0025] 2) The mesh holes of the air inlet screen in this utility model meet the IP20 protection level, which can prevent large foreign objects from entering the resistor air duct and protect the resistor air duct.

[0026] 3) This utility model is equipped with a conical air guide device to make the airflow evenly distributed in the air duct of the box, avoid the airflow creating blind spots in the air duct, and prevent the braking resistor from overheating locally. In addition, the upper part of the air outlet shell adopts a double-layer structure, namely a first arc plate and a second arc plate, with a certain gap between the two layers, which reduces the air temperature above the resistor air outlet shell and reduces the impact of high temperature on the equipment above the resistor. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the air duct in the box of this utility model;

[0028] Figure 2 This is a schematic diagram of the air inlet mesh cover in this utility model;

[0029] Figure 3 This is a schematic diagram of the conical air guide device in this utility model;

[0030] Figure 4 This is a front view of the conical air guide device in this utility model;

[0031] Figure 5 This is a side view of the air outlet housing in this utility model;

[0032] Figure 6 for Figure 5 Sectional view at point AA;

[0033] Figure 7 This is an exploded view of the air outlet shell in this utility model;

[0034] Explanation of markings in the diagram:

[0035] 1-Inlet grille, 2-Fan, 3-Casing duct, 4-Outlet shell, 41-Fan-shaped plate, 42-First arc-shaped plate, 43-Second arc-shaped plate, 44-First guide plate, 45-Second guide plate, 5-Conical air guide device, 51-First support plate, 52-Second support plate, 53-Inner air guide plate, 531-First inner air guide plate, 532-Second inner air guide plate, 533-Third inner air guide plate, 534-Fourth inner air guide plate Plate, 54-Outer air guide plate, 541-First outer air guide plate, 542-Second outer air guide plate, 543-Third outer air guide plate, 544-Fourth outer air guide plate, 55-Bracket, 56-Upright plate, 6-Resistor box, 7-Fan clearance hole, 8-First area, 9-Second area, 10-Third area, 11-Fourth area, 12-First groove, 13-Second groove, 14-Third groove; X-Air inlet, Y-Air outlet. DETAILED DESCRIPTION

[0036] The utility model will be explained in detail below in combination with the drawings and specific embodiments. The following embodiments are implemented on the premise of the above technical solutions of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments.

[0037] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] Some embodiments of the utility model will be explained in detail below in combination with the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] In the following embodiments, if no special description is given to raw materials or processing techniques, it means that they are all conventional commercially available raw material products or conventional processing techniques in the field. If no special description is given to functional components or structures, it means that they are all conventional components or conventional structures adopted in the field to realize the corresponding functions.

[0040] Embodiment:

[0041] A forced air cooling brake resistor air duct structure, as shown in Figure 1 , is arranged on the resistor box body 6, the resistor box body 6 comprises a box air duct 3 and a resistor element arranged in the box air duct 3, and the box air duct 3 is a mica plate air duct, which can avoid the influence of heat inside the air duct on the resistor. The air duct structure comprises a conical air guide device 5, a fan 2, an air inlet mesh cover 1 and an air outlet shell 4 arranged at the outlet end of the box air duct, which are sequentially connected with the inlet end of the box air duct; the air inlet mesh cover 1 is a cubic mesh cover Figure 2 , and each surface of the air inlet mesh cover 1 is provided with a 113.mm*27mm mesh hole, which meets the protection level of IP20 and can prevent foreign matters with a diameter greater than 12.5mm from entering the resistor air duct, thereby protecting the resistor air duct, and in addition, when the front surface of the air inlet mesh cover 1 is blocked by a large foreign matter, the fan 2 can suck air from the remaining five surfaces to dissipate heat for the resistor. A fan accommodation hole 7 is arranged on one side of the air inlet mesh cover 1, and the fan blades of the fan 2 are rotatably arranged at the fan accommodation hole 7. The structure diagram of the conical air guide device 5 is shown in Figure 3 Figure 4 ​As shown in the front view of the conical air guide device, the conical air guide device 5 comprises a first support plate 51 and a second support plate 52 arranged orthogonally, an inner air guide plate 53 and an outer air guide plate 54 arranged side by side between the adjacent ends of the first support plate 51 and the second support plate 52, and a support 55 arranged at the ends of the first support plate 51 and the second support plate 52 for connecting the resistance box body 6. The conical air guide device 5 is formed by riveting between the first support plate 51, the second support plate 52, the inner air guide plate 53 and the outer air guide plate 54, and is fixed in the resistance box body 6 by bolts. The inner air guide plate 53 is inclined inward along the air flow direction, and a plurality of inner air guide plates are connected in sequence to form a converging air guide channel. The outer air guide plate 54 is inclined outward along the air flow direction. Figure 3 And Figure 4 As shown in the front view of the conical air guide device, the conical air guide device 5 comprises a first support plate 51 and a second support plate 52 arranged orthogonally, an inner air guide plate 53 and an outer air guide plate 54 arranged side by side between the adjacent ends of the first support plate 51 and the second support plate 52, and a support 55 arranged at the ends of the first support plate 51 and the second support plate 52 for connecting the resistance box body 6. The conical air guide device 5 is formed by riveting between the first support plate 51, the second support plate 52, the inner air guide plate 53 and the outer air guide plate 54, and is fixed in the resistance box body 6 by bolts. The inner air guide plate 53 is inclined inward along the air flow direction, and a plurality of inner air guide plates are connected in sequence to form a converging air guide channel. The outer air guide plate 54 is inclined outward along the air flow direction. Figure 5 And Figure 6 As shown in the front view of the conical air guide device, the conical air guide device 5 comprises a first support plate 51 and a second support plate 52 arranged orthogonally, an inner air guide plate 53 and an outer air guide plate 54 arranged side by side between the adjacent ends of the first support plate 51 and the second support plate 52, and a support 55 arranged at the ends of the first support plate 51 and the second support plate 52 for connecting the resistance box body 6. The conical air guide device 5 is formed by riveting between the first support plate 51, the second support plate 52, the inner air guide plate 53 and the outer air guide plate 54, and is fixed in the resistance box body 6 by bolts. The inner air guide plate 53 is inclined inward along the air flow direction, and a plurality of inner air guide plates are connected in sequence to form a converging air guide channel. The outer air guide plate 54 is inclined outward along the air flow direction. Figure 7As shown in the exploded view of the air outlet shell 4, the air outlet shell 4 comprises fan-shaped plates 41 arranged side by side, first and second arc-shaped plates 42 and 43 arranged side by side and in clearance fit between the arc edges of the fan-shaped plates 41, and first and second flow guide plates 44 and 45 arranged outwardly along the center of the fan-shaped plates 41 in sequence, the first and second flow guide plates 44 and 45 being arc-shaped plates; one edge of the fan-shaped plate 41 is connected with the outlet end of the air duct of the box body, and the other edge forms a gas outlet with the first arc-shaped plate 42, the air duct structure is arranged on the resistance box body 1 of the metro vehicle, and the gas outlet is parallel to the rail surface of the metro vehicle. The first and second arc-shaped plates 42 and 43 form a double-layer structure in clearance fit, the hot gas discharged from the inside of the resistance directly contacts the second arc-shaped plate 43 and does not contact the first arc-shaped plate 42, so that the temperature of the first arc-shaped plate 42 can be effectively reduced, thereby reducing the air temperature above the air outlet shell of the resistance and reducing the influence of high temperature on the equipment above the resistance.

[0042] The air duct structure in the embodiment has the following advantages:

[0043] (1) The protection of IP20 protects the resistance air duct;

[0044] (2) The airflow in the air duct is uniformly distributed to avoid local overheating;

[0045] (3) The air duct has a certain heat insulation effect to avoid the harm of high temperature to the resistance itself and the surrounding equipment;

[0046] (4) The air duct structure can effectively reduce the adverse effect of the walking wind generated when the train travels on the resistance heat dissipation and improve the heat dissipation efficiency.

[0047] The above description of the embodiments is for the convenience of the ordinary skilled person in the art to understand and use the utility model. Those skilled in the art can easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and those skilled in the art can make improvements and modifications within the scope of the utility model without departing from the scope of the utility model.

Claims

1. A forced air cooling brake resistor air duct structure, provided on a resistor box body (6), the resistor box body (6) comprising a box air duct (3) and a resistor element provided in the box air duct (3), characterized in that, The air duct structure comprises a conical air guide device (5), a fan (2), an air inlet net cover (1) and an air outlet shell (4) provided at the outlet end of the cabinet air duct, which are sequentially connected with the inlet end of the cabinet air duct (3).

2. The air duct structure of the forced air-cooled braking resistor according to claim 1, characterized by, The conical air guide device (5) comprises first and second support plates (51, 52) arranged orthogonally, and inner and outer air guide plates (53, 54) arranged side by side between the adjacent ends of the first and second support plates (51, 52). The inner air guide plates (53) are inclined inward along the airflow direction, and a plurality of the inner air guide plates are sequentially connected to form a converging air guide duct. The outer air guide plates (54) are inclined outward along the airflow direction.

3. The air duct structure of the forced air-cooled braking resistor according to claim 2, characterized by, The first and second support plates (51, 52) orthogonally form first, second, third and fourth regions (8, 9, 10, 11), and the first, second, third and fourth inner air guide plates (531, 532, 533, 534) are respectively located in the first, second, third and fourth regions (8, 9, 10, 11) and connected with the ends of the first and second support plates (51, 52), and the first, second, third and fourth outer air guide plates (541, 542, 543, 544) are respectively located in the first, second, third and fourth regions (8, 9, 10, 11), and the two ends of the first and third outer air guide plates (541, 543) are respectively connected with the ends of the first and second support plates (51, 52), and the second and fourth outer air guide plates (542, 544) are connected with the ends of the second support plate (52).

4. The air duct structure of the forced air-cooled braking resistor according to claim 3, characterized by, The first inner air guide plate (531) is provided with a first groove (12) near one side of the first support plate (51), the third inner air guide plate (533) is provided with a second groove (13) near one side of the first support plate (51), and the fourth inner air guide plate (534) is provided with a third groove (14) near one side of the second support plate (52).

5. The air duct structure of the forced air-cooled braking resistor according to claim 3, characterized by, The second region (9) is further provided with a vertical plate (56), one end of which is connected with the orthogonal position of the first and second support plates (51, 52), and the other end is connected with the middle part of the second inner air guide plate (532).

6. The air duct structure of the forced air-cooled braking resistor according to claim 3, characterized by The end of the first support plate (51) and the second support plate (52) is provided with a support (55) connected with the resistance box body (6).

7. The air duct structure of the forced air-cooled braking resistor according to claim 1, characterized by Each surface of the air inlet mesh cover (1) is provided with a mesh hole, and the size of the mesh hole is 113 mm*27 mm.

8. The air duct structure of the forced air-cooled braking resistor according to claim 1, characterized by, The box air duct (3) is a mica plate air duct.

9. The air duct structure of the forced air-cooled braking resistor according to claim 1, characterized by, The air outlet shell (4) comprises fan-shaped plates (41) arranged side by side, first and second arc-shaped plates (42) and (43) arranged side by side between the arc edges of the fan-shaped plates (41) and in gap cooperation, and first and second flow guide plates (44) and (45) arranged outward in sequence along the center of the fan-shaped plates (41), wherein the first and second flow guide plates (44) and (45) are arc-shaped plates; one edge of the fan-shaped plate (41) is connected with the outlet end of the box air duct, and the other edge forms a gas outlet together with the first arc-shaped plate (42).

10. The air duct structure of the forced air-cooled braking resistor according to claim 9, characterized by The air duct structure is arranged on the resistance box body (6) of a subway vehicle, and the gas outlet is parallel to the rail surface of the subway vehicle.

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