A ventilation and heat dissipation device for train equipment compartment

Abstract

This invention discloses a ventilation and heat dissipation device for a train equipment compartment, including a ventilation opening on the end plate of the equipment compartment and a filter screen and tray disposed between the bottom plate and the top plate of the equipment compartment. Several ventilation blades are installed at the ventilation openings, and each ventilation blade rotates within the ventilation opening when subjected to wind pressure. A limiting rod is also provided at the ventilation opening to limit the rotation amplitude of the ventilation blades. This device significantly increases the ventilation efficiency between the equipment compartment and the external airflow field, and reduces the aerodynamic drag of the train.

Description

Technical Field

[0001] This invention relates to the field of ventilation and heat dissipation technology, and in particular to a ventilation and heat dissipation device for a train equipment compartment. Background Technology

[0002] When a train is running at high speed, the onboard equipment such as motors, traction transformers, and traction converters in the bottom equipment compartment continuously generate heat. Current trains rely on grilles on the side skirts and bottom of the equipment compartment for ventilation and heat dissipation. The front and rear ends of the equipment compartment are completely closed, making it impossible to create a longitudinal ventilation path within the compartment. Furthermore, when the train is running at high speed, the ventilation capacity decreases due to the pressure difference between the inside and outside of the equipment compartment. This invention, by improving ventilation efficiency, can significantly reduce the heat dissipation pressure in the equipment compartment, potentially eliminating the need for the existing liquid cooling module in the train's equipment compartment, thereby achieving improved train safety and a lightweight design. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a ventilation and heat dissipation device for train equipment compartments that has good heat dissipation effect, simple structure, and stable and reliable performance.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A ventilation and heat dissipation device for a train equipment compartment includes a ventilation opening on the end plate of the equipment compartment and a filter screen disposed between the bottom plate and the top plate of the equipment compartment. Several ventilation blades are movably installed at the ventilation opening. Each ventilation blade rotates within the ventilation opening when subjected to wind pressure. A limiting rod for limiting the rotation amplitude of the ventilation blades is also provided at the ventilation opening.

[0006] As a further improvement to the above technical solution:

[0007] The height of each ventilation blade is consistent, and the width increases or decreases with the wind pressure at its location, thereby ensuring that all ventilation blades are rotated by wind pressure and have the same angle with the end plate of the equipment compartment, so that the air intake is uniform throughout the equipment compartment.

[0008] Each of the ventilation blades is movably connected to the end plate of the equipment compartment via a hinge, and a torsion spring is provided on the hinge.

[0009] Each of the ventilation blades is configured as a V-shaped blade forming an obtuse angle, and limit rods are provided on both the inner and outer sides of the upper blade of the V-shaped blade.

[0010] A tray is bolted to the bottom plate of the equipment compartment. The tray has a groove on each side near the skirt. The bottom of the filter screen is fitted into the groove. A guide rail seat is provided on the top plate of the equipment compartment. The top of the filter screen is fitted into the guide rail. The groove and the guide rail cooperate to fix the filter screen.

[0011] The tray is provided with a connecting seat, and the connecting seat has bolt holes.

[0012] The filter screen includes two outer filter screens and an inner filter screen disposed between the two outer filter screens. The outer filter screen is an aluminum honeycomb filter screen with a diameter of 1 mm and pores of regular hexagons with a side length of 5 mm. The inner filter screen is a metal wire filter screen with a wire diameter of 1 mm and pores of 2 mm.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] The ventilation and heat dissipation device of this invention has ventilation openings on the end plates at both ends of the equipment compartment, which creates a longitudinal ventilation path in the equipment compartment during train operation. This increases the mass flow rate of cold air in the equipment compartment, greatly improving the heat dissipation effect and reducing the investment in other cooling equipment, thus achieving a lightweight design for the train. Secondly, opening ventilation openings on the front and rear end plates of the equipment compartment can reduce the pressure difference resistance between the front and rear of the equipment compartment, thereby reducing the resistance during train operation and achieving a certain energy-saving effect. In addition, ventilation blades are installed at the ventilation openings to prevent foreign objects such as stones from being blown directly onto the filter screen with the airflow, avoiding damage to the filter screen and providing a protective function. Its structure is safe and reliable. Furthermore, the ventilation blades swing and rise under wind pressure during train operation, which not only eliminates the need for additional equipment to control them, but also ensures a reliable operating mechanism and is suitable for the bidirectional operation of the train. Limiting rods are also installed to limit and protect the ventilation blades, preventing structural damage caused by the ventilation blades colliding with the equipment compartment end plates due to turbulent pulsation impact. Attached Figure Description

[0015] Figure 1 This is a schematic diagram (front view) of the overall structure of the present invention.

[0016] Figure 2 This is a partial structural schematic diagram (three-dimensional view) of the present invention.

[0017] Figure 3 This is a schematic diagram (side view) of the overall structure of the present invention.

[0018] Figure 4 This is a partial structural schematic diagram (front view) of the present invention.

[0019] Figure 5 This is a schematic diagram (three-dimensional view) of the installation of the ventilation blades of the present invention.

[0020] Figure 6 This is a schematic diagram (three-dimensional view) of the filter part of the present invention.

[0021] Figure 7 This is a schematic diagram of the tray structure of the present invention.

[0022] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0023] Figure 9 This is a schematic diagram (3D view) showing the position of the equipment compartment end plate on the train.

[0024] Figure 10 yes Figure 9 Side view.

[0025] Figure 11 yes Figure 9 AA section view.

[0026] Figure 12 yes Figure 9 Pressure diagram of the equipment compartment end plate at section AA (when the train is running).

[0027] Figure 13 yes Figure 9 Pressure diagram of the end plate of the equipment compartment at section BB (when the train is running).

[0028] Figure 14 This is a schematic diagram of airflow in the equipment compartment of a train using the ventilation and heat dissipation device of the present invention.

[0029] Figure 15 This is a flow diagram of the train equipment compartment using a longitudinal ventilation system, an existing train transverse grille ventilation system, and the ventilation and heat dissipation device of this invention.

[0030] Figure 16 This is a surface temperature cloud map of the traction converter inside the equipment compartment that applies the longitudinal opening ventilation system, the existing train transverse grid ventilation system, and the ventilation and heat dissipation device of the present invention.

[0031] Figure 17 This is a comparison chart of the average surface temperature of the traction converter inside the equipment compartment of the ventilation and heat dissipation device of the present invention, using a longitudinal opening ventilation system, an existing train transverse grid ventilation system, and the ventilation and heat dissipation device of the present invention.

[0032] The labels in the diagram represent:

[0033] 1. Ventilation opening; 2. Filter screen; 21. External filter screen; 22. Internal filter screen; 3. Ventilation blades; 4. Limiting rod; 5. Hinge; 6. Torsion spring; 7. Tray; 71. Connecting seat; 711. Bolt hole; 8. Guide rail seat; 9. Equipment compartment support beam; 10. End plate. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 11As shown, the ventilation and heat dissipation device for the train equipment compartment in this embodiment includes a ventilation opening 1 on the end plate 10 of the equipment compartment and a filter screen 2 disposed between the bottom plate and the top plate of the equipment compartment. Several ventilation blades 3 are movably installed at the ventilation opening 1. Each ventilation blade 3 rotates within the ventilation opening 1 when subjected to wind pressure. A limiting rod 4 for limiting the rotation amplitude of the ventilation blades 3 is also provided at the ventilation opening 1. The ventilation and heat dissipation device of this embodiment works in conjunction with the transverse grids set on the side skirts of the equipment compartment. Compared with the existing devices that only use transverse grids for ventilation and heat dissipation in the equipment compartment, the ventilation and heat dissipation device of this invention has ventilation openings 1 on the end plates 10 at both ends of the equipment compartment. This creates a longitudinal flow path in the equipment compartment when the train is running, increasing the airflow in the equipment compartment and significantly improving the heat dissipation effect. This reduces the investment in other cooling equipment and achieves a lightweight design for the train. Secondly, opening ventilation openings 1 on the front and rear end plates 10 of the equipment compartment can reduce the pressure difference resistance between the front and rear of the equipment compartment, thereby reducing the resistance when the train is running and achieving a certain energy-saving effect. In addition, the ventilation blades 3 are lifted by wind pressure when the train is running. This not only eliminates the need for additional equipment to control them, but also ensures a reliable operating mechanism and meets the actual engineering requirements for bidirectional train operation. Finally, a limit rod 4 is set to limit and protect the ventilation blades 3, preventing the ventilation blades 3 from colliding with the end plates 10 of the equipment compartment due to turbulent pulsation impact and causing damage to the structure of the end plates 10.

[0036] Figure 11 and Figure 12 The diagram illustrates the wind pressure experienced at various points on the equipment compartment end plate 10 during train operation. It shows that the wind pressure on the end plates 10 on both sides of the equipment compartment support beam 9 gradually decreases from the outer edges to the center, while the wind pressure on the end plate 10 below the equipment compartment support beam 9 gradually increases from both sides to the center. In this embodiment, a ventilation opening 1 is provided on each of the end plates 10 on both sides of the equipment compartment support beam 9, and a ventilation opening 1 is provided below the equipment compartment support beam 9. The ventilation blades 3 at each ventilation opening 1 have the same height. The width of the ventilation blades 3 at the ventilation openings 1 on both sides of the equipment compartment support beam 9 decreases from the sides to the center, while the width of the ventilation blades at the ventilation openings 1 on the end plate 10 below the equipment compartment support beam 9 increases from the sides to the center. The variable-size design of each ventilation blade 3 ensures that the wind pressure experienced by each ventilation blade 3 is similar, resulting in similar upward angles for each ventilation blade 3 and preventing insufficient heat dissipation due to insufficient airflow at certain locations.

[0037] In this embodiment, each ventilation blade 3 is movably connected to the equipment compartment end plate 10 via a hinge 5, and a torsion spring 6 is provided on the hinge 5. In this structure, the ventilation blade 3 is connected to the equipment compartment end plate 10 via the hinge 5, and the torsion spring 6 is provided on the hinge. When the train is stationary, the torsion spring 6 keeps the ventilation blade 3 parallel and in contact with the end plate 10 at the ventilation opening 1, preventing the ventilation blade 3 from shaking randomly when the train is stationary, which would cause dust, insects, etc. to enter the equipment compartment.

[0038] In this embodiment, each ventilation blade 3 is configured as a V-shaped blade with an obtuse angle, and a limit rod 4 is provided on both sides of the upper blade of the V-shaped blade. In this structure, the limit rod 4 is provided on both sides of the upper blade of the V-shaped blade to meet the limit protection requirements of the ventilation blade 3 when the train is running in both directions.

[0039] In this embodiment, a tray 7 is bolted to the bottom plate of the equipment compartment. The tray 7 has a groove, and the bottom of the filter screen 2 is fitted into the groove. In this structure, the tray 7 at the bottom of the filter screen 2 can collect sand, dust, etc. filtered by the filter screen 7. The tray 7 is bolted to the bottom plate of the equipment compartment, which facilitates cleaning when the train enters the depot for maintenance. The way the filter screen 2 and the groove fit together also facilitates the disassembly, cleaning, maintenance, and replacement of the filter screen 2.

[0040] In this embodiment, a guide rail seat 8 corresponding to the groove is provided on the top plate of the equipment compartment. A guide rail is provided on the guide rail seat 8, and the top of the filter screen 2 is snapped into the guide rail. In this structure, the top of the filter screen 2 is snapped into the guide rail seat 8 on the top plate of the equipment compartment, and the connection is firm and reliable, which facilitates disassembly, cleaning and replacement.

[0041] In this embodiment, a connecting seat 71 is provided on the tray 7, and bolt holes 711 are provided on the connecting seat 71. Its structure is simple and easy to install and disassemble.

[0042] In this embodiment, the filter 2 includes two outer filter screens 21 and an inner filter screen 22 disposed between the two outer filter screens 21. The outer filter screen 21 is made of honeycomb aluminum, and the inner filter screen 22 is made of metal wire. In this structure, the honeycomb aluminum filter screen has strong load-bearing capacity and light weight, and can be used as the outer filter screen 21 to filter out foreign objects with larger particle sizes such as insects. The metal wire filter screen has small pores and can be used as the inner filter screen 22 to filter out foreign objects with smaller particle sizes such as sand and dust, reducing the impact of dust on the electrical equipment in the equipment compartment. It has good permeability, low wind resistance coefficient, and can be reused.

[0043] Figure 14 A schematic diagram of airflow in the equipment compartment of a train using the ventilation and heat dissipation device of the present invention is shown. Figure 15The diagram shows the flow lines inside the train equipment compartment when using a longitudinal ventilation system, an existing train transverse grille ventilation system, and the ventilation and heat dissipation device of the present invention. When the existing train is running, the front end plate 10 is a high-pressure area, and the rear end plate 10 is a low-pressure area, creating a pressure difference drag on the train. Opening ventilation openings 1 on the end plates 10 can reduce this pressure difference, thereby reducing the overall vehicle drag. After the airflow enters the equipment compartment, it flows to both sides of the compartment due to the presence of the equipment inside, i.e., the space between the equipment compartment and the skirt. Because of the pressure difference generated by the airflow, the air in the gaps between the various devices in the compartment also flows to both sides. Therefore, the equipment near the air inlet does not significantly affect the heat dissipation effect of the equipment in the middle and near the air outlet. As can be seen from the diagram, when the train uses the ventilation and heat dissipation device of the present invention, not only a transverse ventilation path is formed in the equipment compartment, but also a longitudinal ventilation path is formed, reducing vortices in the equipment compartment and greatly increasing the airflow through the equipment compartment, resulting in good ventilation and heat dissipation.

[0044] Figure 16 The diagram shows the surface temperature cloud map of the traction converter in the equipment compartment when using a longitudinal opening ventilation system, an existing train transverse grid ventilation system, and the ventilation and heat dissipation device of the present invention. According to the results of numerical simulation, compared with longitudinal opening ventilation and transverse grid ventilation, when the ventilation and heat dissipation device of the present invention is used, the surface temperature cloud map of the traction converter in the equipment compartment is lighter in color, indicating that the temperature is lower and the ventilation and heat dissipation effect is better.

[0045] Figure 17 A comparison chart showing the average surface temperature of the traction converter inside the equipment compartment using a longitudinally ventilated ventilation system, an existing train's transverse grid ventilation system, and the ventilation and heat dissipation device of this invention is presented. Numerical simulation results show that, using the average surface temperature of the traction converter with the ventilation device of this invention as a standard, the average surface temperature of the traction converter using the longitudinally ventilated ventilation system is 17.3% higher, and the average surface temperature using the transverse grid ventilation system is 7.6% higher. Figure 17 The improved heat dissipation effect of the ventilation and heat dissipation device of the present invention is quantitatively described.

[0046] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A ventilation and heat dissipation device for a train equipment compartment, characterized in that: It includes a vent (1) opened on the end plate of the equipment compartment and a filter (2) set between the bottom plate and the top plate of the equipment compartment. Several ventilation blades (3) are movably installed at the vent (1). Each ventilation blade (3) rotates at the vent (1) when subjected to wind pressure. A limiting rod (4) is also provided at the vent (1) to limit the rotation amplitude of the ventilation blades (3). The length of each of the ventilation blades (3) is the same, and the width increases or decreases with the wind pressure at the location. Each of the ventilation blades (3) is configured as a V-shaped blade forming an obtuse angle, and a limit rod (4) is provided on both the inner and outer sides of the upper blade of the V-shaped blade.

2. The ventilation and heat dissipation device for the train equipment compartment according to claim 1, characterized in that: Each of the ventilation blades (3) is movably connected to the equipment compartment end plate via a hinge (5), and a torsion spring (6) is provided on the hinge (5).

3. The ventilation and heat dissipation device for the train equipment compartment according to claim 1, characterized in that: A tray (7) is bolted to the bottom plate of the equipment compartment. The tray (7) has a groove, and the bottom of the filter screen (2) is fitted into the groove.

4. The train equipment compartment ventilation and heat dissipation device according to claim 3, characterized in that: The top plate of the equipment compartment is provided with a guide rail seat (8) corresponding to the groove, and the top of the filter screen (2) is fitted into the guide rail on the guide rail seat (8).

5. The train equipment compartment ventilation and heat dissipation device according to claim 3, characterized in that: The tray (7) is provided with a connecting seat (71), and the connecting seat (71) is provided with bolt holes (711).

6. The train equipment compartment ventilation and heat dissipation device according to claim 1, characterized in that: The filter (2) includes two outer filter screens (21) and an inner filter screen (22) disposed between the two outer filter screens (21). The outer filter screen (21) is an aluminum honeycomb filter screen, and the inner filter screen (22) is a metal wire filter screen.

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