Railway vehicle and snow accumulation prevention device for bogie thereof

Abstract

The present application discloses a kind of rail vehicle and its bogie anti-snow device, bogie anti-snow device includes at least one flow guide air duct, the airflow direction in all flow guide air duct is opposite with the direction of movement of car body;Each flow guide air duct includes first air duct and at least one second air duct, each second air duct is crossed with the end of first air duct and is communicated;First air duct is used to guide airflow to flow through bogie along the upper surface of bogie, and first air duct is equipped with at least one air jet, and each air jet is used to spray air from top to bottom to bogie to melt the ice and snow accumulated on bogie;Each second air duct is used to guide airflow to flow from the end of bogie to its bottom to interfere with snow to flow into bogie.The present application can interfere with airflow to flow into bogie and melt the ice and snow accumulated on bogie simultaneously in heavy snow weather, and can also cool down bogie in high temperature weather, reduce the adverse factors that threaten the safe operation of rail vehicle, and improve the driving safety of rail vehicle.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a rail vehicle and its bogie snow-proofing device. Background Technology

[0002] The bogie is a core component of the rail vehicle's running system. In cold and icy environments, snow accumulation and icing on the bogie, as well as the temperature rise of heat-generating components such as brake calipers and traction motors, are among the main factors affecting the safe operation of rail vehicles.

[0003] During operation in high-altitude and cold regions during heavy snowfall, snow accumulates on the bogies due to turbulence. This snow melts into water under the influence of heat-generating components such as motors, gearboxes, and disc brakes, then freezes. This process repeats, resulting in large ice blocks on the bogies. These ice blocks alter the bogie's dynamic characteristics, degrade the vehicle's curve-crossing ability, and reduce the operational stability of the braking system. To prevent snow accumulation from threatening the safe operation of rail vehicles, snow and ice removal is one of the main tasks of winter rail vehicle maintenance. Furthermore, during hot weather, high temperatures cause the metal components in the bogies to expand, reducing gaps, and also degrade the lubricating grease, leading to increased friction and wear between the metal components. To prevent high temperatures from threatening the safe operation of rail vehicles, temperature rise control of heat-generating components is one of the main design parameters for bogies. Therefore, the design of rail vehicle running systems must focus on reducing snow and ice accumulation on the bogies and improving the heat dissipation efficiency of heat-generating components.

[0004] Existing bogies are equipped with snow-proof devices at both ends. These devices are mostly mechanical and typically have inclined guide surfaces to deflect airflow away from the bogie and prevent it from flowing into it. This reduces the amount of snow flowing into the bogie and thus prevents snow accumulation. However, due to limitations in current technology, a small amount of snow still enters the bogie. Furthermore, existing snow-proof devices cannot dissipate heat from the bogie during high-temperature operation, which still poses a threat to driving safety. Summary of the Invention

[0005] The purpose of this invention is to provide a bogie anti-snow accumulation device for rail vehicles, which can both interfere with the airflow into the bogie and melt the accumulated ice and snow on the bogie during heavy snow, and cool the bogie in hot weather, effectively reducing adverse factors that threaten the safe operation of rail vehicles and improving the driving safety of rail vehicles.

[0006] To achieve the above objectives, the present invention provides a bogie snow-proof device for a rail vehicle, comprising at least one air duct, wherein the airflow direction in all air ducts is opposite to the running direction of the vehicle body; each air duct includes a first air duct and at least one second air duct, and each second air duct is intersecting and connected to one end of the first air duct; the first air duct is used to guide airflow along the upper surface of the bogie across the bogie, and the first air duct is provided with at least one air jet, each air jet being used to spray air from top to bottom onto the bogie to melt the ice and snow accumulated on the bogie; each second air duct is used to guide airflow from the end of the bogie to its bottom to interfere with the flow of snow into the bogie.

[0007] Preferably, the width of the second air duct gradually decreases in the direction near the bottom of the bogie.

[0008] Preferably, the first air duct and / or the second air duct are provided with a heating device for heating the airflow.

[0009] Preferably, it further includes:

[0010] Temperature sensing element used to detect the current ambient temperature;

[0011] Control devices connected to the temperature sensing element and the heating device respectively;

[0012] When the temperature sensor detects that the current ambient temperature is higher than the preset temperature, the control device controls the heating device to stop heating based on the signal sent by the temperature sensor.

[0013] When the temperature sensor detects that the current ambient temperature is lower than the set temperature, the control device controls the heating device to start heating based on the signal sent by the temperature sensor.

[0014] Preferably, a heat insulation layer is provided outside the air duct.

[0015] Preferably, each jet nozzle is aligned with one of the bogie wheels.

[0016] Preferably, each air outlet of the second air duct is equipped with a valve.

[0017] Preferably, it also includes a base fixed above the bogie, all the air ducts are located in the base, and the side wall of the base is provided with at least one stamped air inlet. Each stamped air inlet is connected to one end of all the air ducts. The stamped air inlet is used to guide the airflow around the vehicle body into the connected air ducts.

[0018] Preferably, the width of the stamped air inlet gradually increases towards the direction of the air duct.

[0019] The present invention also provides a rail vehicle including the bogie snow-proof device described in any of the above claims.

[0020] Compared with the prior art, the bogie snow-proof device for rail vehicles provided by the present invention includes at least one air duct, each air duct including a first air duct and at least one second air duct, each second air duct being connected to one end of the first air duct, and the first air duct being provided with at least one air jet.

[0021] When rail vehicles operate in high-altitude, cold regions during heavy snow, the vehicle body drives the surrounding airflow. Since the airflow direction in all the air ducts is opposite to the direction of vehicle movement, the high-speed airflow actively flows into each air duct. Within each air duct, the airflow splits into two paths. One path flows along the first air duct from the upper surface of the bogie across the bogie, and then through each jet nozzle from top to bottom onto the bogie, melting the accumulated ice and snow on the bogie and preventing the formation of large ice blocks, thus preventing snow accumulation. The other path flows along the second air duct from the end of the bogie to its bottom, interfering with the flow of snow into the bogie and ensuring that the snow flows towards the track or ground at the bottom of the bogie. By changing the direction of snow flow, the amount of snow flowing into the bogie is reduced, achieving the purpose of preventing snow accumulation.

[0022] When the rail vehicle is running in high temperature weather, the airflow around the car body still actively flows into each air duct. The airflow in each air duct can blow away the hot air accumulated on the upper surface of the bogie along the first air duct, and blow the hot air at the end of the bogie to the bottom of the bogie along the second air duct, so that the interior of the bogie can be cooled down by natural air cooling.

[0023] Therefore, the bogie anti-snow accumulation device for rail vehicles provided by the present invention can both interfere with the airflow into the bogie and melt the ice and snow accumulated on the bogie in heavy snow weather, and cool the bogie in high temperature weather, effectively reducing adverse factors that threaten the safe operation of rail vehicles and improving the driving safety of rail vehicles.

[0024] The rail vehicle provided by the present invention includes the above-mentioned bogie snow-proof device and has the same beneficial effects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a structural diagram of a bogie snow-proof device for a rail vehicle provided in a specific embodiment of the present invention;

[0027] Figure 2 for Figure 1 Mid-section view;

[0028] Figure 3 A diagram illustrating the snow-proofing state of a bogie anti-snow accumulation device for a rail vehicle during heavy snowfall, provided in a specific embodiment of the present invention.

[0029] Figure 4 A diagram illustrating the air-cooling state of a bogie snow-proof device for rail vehicles in high-temperature weather, provided in a specific embodiment of the present invention.

[0030] Figure 5 for Figure 4 A magnified view of part I.

[0031] The attached figures are labeled as follows:

[0032] Air duct 1, bogie 2 and base 3;

[0033] First air duct 11 and second air duct 12;

[0034] Jet nozzle 111;

[0035] Valve 121;

[0036] Stamped air inlet 31. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] This invention discloses a snow-proof device for the bogie of a rail vehicle, such as... Figures 1 to 5 As shown, it includes at least one air duct 1, all air ducts 1 are arranged side by side, and each air duct 1 is used to guide airflow from outside the car body into the bogie 2.

[0040] Each air intake duct 1 includes a first air intake duct 11 and at least one second air intake duct 12. Each second air intake duct 12 is connected to one end of the first air intake duct 11. The airflow flowing into the air intake duct 1 is divided into two paths: one path flows along the first air intake duct 11, and the other path flows along the second air intake duct 12. Considering that the rail train travels in both directions, a second air intake duct 12 is set at each end of the first air intake duct 11. During the operation of the rail train, the airflow only flows into one of the second air intake ducts 12.

[0041] The first air duct 11 is a constant cross-section air duct, located above the bogie 2, and is used to guide airflow along the upper surface of the bogie 2. The first air duct 11 has at least one jet nozzle 111, each jet nozzle 111 spraying air downwards onto the bogie 2 to melt the accumulated ice and snow on the bogie 2 and direct the melted water towards the bottom of the bogie 2. All jet nozzles 111 are evenly distributed along the length of the bogie 2 to ensure thorough clearing of accumulated ice and snow. Of course, the position of the jet nozzles 111 can be adapted to the snow and ice accumulation area of ​​the bogie 2.

[0042] Each second air duct 12 is used to guide airflow from the end of the bogie 2 to its bottom, interfering with the flow of snow into the bogie 2 in the direction of downward air jet, changing the direction of snow flow, and causing the snow to flow towards the track or ground at the bottom of the bogie 2, reducing the amount of snow flowing into the bogie 2, and achieving the effect of preventing snow accumulation.

[0043] like Figure 3 As shown, when a rail vehicle operates in heavy snow in a cold region, the vehicle body drives the surrounding airflow. Since the airflow direction in all the air intake ducts 1 is opposite to the direction of vehicle movement, the high-speed airflow actively flows into each air intake duct 1. The airflow is divided into two paths in each air intake duct 1. One path flows along the first air intake duct 11 from the upper surface of the bogie 2 across the bogie 2, and then sprays air from top to bottom onto the bogie 2 through each air jet vent 111, melting the ice and snow accumulated on the bogie 2 and preventing the formation of large ice blocks on the bogie 2, thus achieving snow prevention. The other path flows along the second air intake duct 12 from the end of the bogie 2 to its bottom, interfering with the flow of snow into the bogie 2 and ensuring that the snow flows to the track or ground at the bottom of the bogie 2. By changing the direction of snow flow, the amount of snow flowing into the bogie 2 is reduced, thus achieving the purpose of snow prevention.

[0044] like Figure 4 As shown, when the rail vehicle is operating in high-temperature weather, the airflow around the car body still actively flows into each air duct 1. The airflow in each air duct 1 can both blow away the hot air accumulated on the upper surface of the bogie 2 along the first air duct 11 and blow the hot air at the end of the bogie 2 to the bottom of the bogie 2 along the second air duct 12, so that the interior of the bogie 2 is cooled by natural air cooling. Of course, the airflow can also flow only along the first air duct 11 to cool a local area of ​​the bogie 2.

[0045] In summary, the bogie anti-snow accumulation device for rail vehicles provided by this invention can both interfere with the airflow into the bogie 2 and melt the accumulated ice and snow on the bogie 2 during heavy snow, and cool the bogie 2 in hot weather, effectively reducing adverse factors that threaten the safe operation of rail vehicles and improving the driving safety of rail vehicles.

[0046] In addition, the air duct 1, which consists of the first air duct 11 and the second air duct 12, is easy to process, manufacture and maintain. Without changing the structure and performance of the bogie 2, it can significantly reduce the amount of snow accumulation on the bogie 2 and adapt to the structure of rail vehicles and bogie 2 at different speed levels. The higher the speed of the car body, the better the snow removal and heat dissipation effect.

[0047] The second air duct 12 is a shrinking variable cross-section air duct. The width of the second air duct 12 gradually decreases in the direction near the bottom of the bogie 2, so that the air outlet velocity of the second air duct 12 is increased by continuously shrinking the air duct cross-section, ensuring that the airflow ejected from the second air duct 12 has sufficient pressure to interfere with the snow accumulation entering the bogie 2.

[0048] The first air duct 11 and / or the second air duct 12 are equipped with heating devices to heat the airflow, accelerate the melting of ice and snow, and improve the snow-proof performance. The heating device may specifically be a resistance wire, but is not limited to this. To further optimize the above technical solution, based on the above embodiments, preferably, the heating device is located inside the first air duct 11 to ensure that the ice and snow accumulated on the bogie 2 melts completely.

[0049] The aforementioned bogie snow-proof device for rail vehicles also includes a temperature detection element and a control device. The temperature detection element is used to detect the current ambient temperature, and can be a temperature sensor, but is not limited to that. The control device is connected to both the temperature detection element and the heating device.

[0050] When the rail vehicle operates in hot weather, if the temperature sensor detects that the current ambient temperature is higher than the preset temperature, the control device receives the signal sent by the temperature sensor and sends the signal to the heating device, controlling the heating device to stop heating, thus achieving automatic shutdown of the heating device. That is, when the air duct 1 is dissipating heat, the heating device does not work, and the first air duct 11 and the second air duct 12 are mainly used for ventilation.

[0051] When rail vehicles operate in high-altitude, cold regions during heavy snow, if the temperature sensor detects that the current ambient temperature is lower than the set temperature, the control device receives the signal from the temperature sensor and sends it to the heating device, controlling the heating device to start heating, thus enabling automatic heating. Both the preset temperature and the set temperature mentioned in this text can be pre-set and stored in the control device.

[0052] It should be noted that the control device should include a signal receiving unit, a signal judging unit, and a signal transmitting unit. The signal receiving unit receives the electrical signal sent by the temperature sensing element. The signal judging unit is electrically connected to the signal receiving unit so that it can determine whether the signal received by the signal receiving unit is a trigger signal. The signal transmitting unit is electrically connected to the signal judging unit so that it can send the judgment signal generated by the signal judging unit to the heating device. The specific arrangement of the signal receiving unit, signal judging unit, and signal transmitting unit can refer to the prior art; in this invention, only the application scenario of the above three components has been changed, and no substantial improvement has been made. Obviously, control devices with this structure are widely used in existing automatic control equipment, such as MCUs, DSPs, or microcontrollers. The key point of this invention is that the control device combines the temperature sensing element and the heating device.

[0053] A heat insulation layer is provided outside the air duct 1 to isolate the air duct 1 from the external environment when the heating device heats the airflow, thus preventing severe heat loss and affecting heating efficiency. Specifically, the heating device is located in the first air duct 11, and only a heat insulation layer needs to be provided outside the first air duct 11. The specific type of heat insulation layer can be found in existing technology and will not be described in detail here.

[0054] Each air jet 111 is aligned with the wheel of the bogie 2 to prevent excessive accumulation of ice and snow on the wheel, which could affect the curve-passing ability of the rail vehicle and the operational stability of the braking system. Of course, the arrangement of the air jet 111 is not limited to this.

[0055] Each air outlet of the second air duct 12 is equipped with a valve 121. When the train is running at normal temperature or dissipating heat at high temperature, the valve 121 remains closed. Figure 5 As shown, at this time, there is no need to remove snow or dissipate heat, and the second air duct 12 does not spray airflow, preventing foreign objects from entering the bogie 2 along the second air duct 12 and causing abnormal operation of the bogie 2, which is of positive significance for improving driving safety. When it is necessary to remove snow, the valve 121 can be opened to ensure that the airflow in the second air duct 12 flows out smoothly.

[0056] The aforementioned bogie snow-proof device for rail vehicles also includes a base 3 fixed above the bogie 2. All the air ducts 1 are located within the base 3. The side wall of the base 3 is provided with at least one pressurized air inlet 31. Each pressurized air inlet 31 is connected to one end of all the air ducts 1. Considering that the airflow direction in the air duct 1 is opposite to the direction of the car body's operation, the airflow around the car body is actively forced into the pressurized air inlet 31. The pressurized air inlet 31 is used to guide the airflow around the car body into the connected air duct 1. In this way, there is no need to add an extra fan, effectively eliminating the energy consumption generated by the fan. Moreover, the air intake of the pressurized air inlet 31 is directly proportional to the car body's operating speed. The higher the car body's operating speed, the greater the air intake of the pressurized air inlet 31, and the greater the airflow velocity in the first air duct 11 and the second air duct 12.

[0057] The stamped air inlet 31 is a variable cross-section air inlet, specifically triangular in shape. The width of the stamped air inlet 31 gradually increases in the direction close to the air duct 1, thereby increasing the wind speed of the stamped air inlet 31 and further improving the snow removal effect.

[0058] This invention also discloses a rail vehicle that includes the above-mentioned bogie snow-proof device, which has the same beneficial effects.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A snow accumulation preventing device for a bogie of a railway vehicle, characterized by, The anti-snow device for bogie comprises at least one air flow channel (1), the air flow in all the air flow channels (1) flows in the opposite direction of the running direction of the vehicle body; each of the air flow channels (1) comprises a first air flow channel (11) and at least one second air flow channel (12), the first air flow channel (11) is an air flow channel with equal cross section, each of the second air flow channels (12) is cross connected with one end of the first air flow channel (11); the first air flow channel (11) is used for guiding the air flow to flow along the upper surface of the bogie (2) and melt the ice and snow accumulated on the bogie (2) by spraying air from top to bottom; each of the second air flow channels (12) is used for guiding the air flow to flow from the end of the bogie (2) to the bottom of the bogie (2) to interfere with the snow flowing into the bogie (2); The second air flow channel (12) is a converging variable cross section air flow channel, the width of the second air flow channel (12) gradually decreases in the direction close to the bottom of the bogie (2); The anti-snow device for bogie further comprises a base (3) fixed above the bogie (2), all the air flow channels (1) are arranged in the base (3), the sidewall of the base (3) is provided with at least one ram air inlet (31), each of the ram air inlets (31) is connected with one end of all the air flow channels (1), and the ram air inlet (31) is used for guiding the air flow around the vehicle body to flow into the connected air flow channel (1).

2. The snow accumulation preventing device for a bogie of a railway vehicle according to claim 1, characterized in that, The first air flow channel (11) and / or the second air flow channel (12) is provided with a heating device for heating the air flow.

3. The snow accumulation preventing device for a bogie of a railway vehicle according to claim 2, characterized in that, Further comprising: a temperature detecting member for detecting the current ambient temperature; a control device connected with the temperature detecting member and the heating device respectively; when the temperature detecting member detects that the current ambient temperature is higher than the preset temperature, the control device is used for controlling the heating device to stop heating according to the signal sent by the temperature detecting member; when the temperature detecting member detects that the current ambient temperature is lower than the set temperature, the control device is used for controlling the heating device to start heating according to the signal sent by the temperature detecting member.

4. The snow accumulation preventing device for a bogie of a railway vehicle according to claim 3, characterized in that, The air flow channel (1) is provided with a heat insulation layer.

5. The snow accumulation prevention device for a bogie of a railway vehicle according to any one of claims 1 to 4, characterized in that, Each of the air outlets of the second air flow channels (12) is provided with a valve (121).

6. The snow accumulation prevention device for a bogie of a railway vehicle according to any one of claims 1 to 4, characterized in that, The width of the ram air inlet (31) gradually increases in the direction close to the air flow channel (1).

7. The snow accumulation preventing device for a bogie of a railway vehicle according to claim 1, characterized by The anti-snow device for bogie comprises the bogie anti-snow device according to any one of claims 1 to 7.

8. A rail vehicle, characterized by ​

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