A high-speed train multi-service vehicle-mounted low wind resistance antenna

Abstract

The present invention relates to the field of vehicle-mounted antenna technology, and in particular to a high-speed train multi-service vehicle-mounted low-wind resistance antenna, comprising: a base, a signal unit and a cover, wherein the signal unit and the cover are both mounted on the base; the cover comprises a windward surface formed at the front end and a leeward surface formed at the rear end, and transition surfaces are further formed on both sides of the cover, and the surfaces of the transition surface and the leeward surface are both formed with smooth transition portions; wherein a wind-breaking ridge is further formed between the tops of the two transition surfaces. The streamlined antenna structure designed in the present invention is further optimized on the basis of the original antenna model, and the drag reduction effect is obvious under the design wind speed, thereby solving the problem that the current antenna cannot continue to meet the overall wind resistance requirements of the high-speed train. At the same time, the present invention also designs a heat dissipation structure for the antenna, so that while ensuring that the entire antenna reduces wind resistance, it can also achieve heat dissipation of the entire antenna's internal components to further ensure operational stability.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted antennas, and in particular to a high-speed train multi-service vehicle-mounted low-wind resistance antenna. Background Art

[0002] With the introduction of new high-speed trains in my country, the demand for train-to-ground communications is growing. The number and layout of high-speed train rooftop antennas need to be optimized based on the characteristics of these new high-speed EMUs. As train speeds increase, wind resistance is becoming a major factor impacting operating efficiency. As part of the train, onboard antennas influence the airflow around the EMU roof, increasing the train's resistance.

[0003] Currently, the existing onboard antenna models and types cannot meet the overall wind resistance requirements for use on new high-speed trains. The CR400 antenna model, in particular, generates significant wind resistance at a design wind speed of 500 km / h. This antenna model measures 350mm * 100mm * 158mm, with symmetrical front and rear ends, and the radome walls and antenna base directly facing the incoming airflow. However, the grooves on both sides of the center significantly affect the overall flow, resulting in a poor aerodynamic shape and high wind resistance, making it unable to meet the overall drag reduction requirements of high-speed trains.

[0004] The main problem with the CR400 antenna model is the poor aerodynamic shape at both ends and the design of the grooves on both sides, which increase the wind resistance of the antenna.

[0005] Therefore, a new low-drag antenna design is urgently needed to meet the engineering requirements of high-speed trains in terms of drag reduction. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art, such as poor aerodynamic shape at both ends and the design of grooves on both sides, which lead to increased wind resistance of the antenna, and to propose a high-speed train multi-service onboard low wind resistance antenna.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] Design a high-speed train multi-service onboard low wind resistance antenna, including:

[0009] A base, a signal unit and a cover, wherein the signal unit and the cover are both mounted on the base;

[0010] The cover shell includes a windward surface formed at the front end and a leeward surface formed at the rear end, and transition surfaces are formed on both sides of the cover shell, and the surfaces of the transition surface and the leeward surface are both formed with smooth transition portions;

[0011] A wind-breaking ridge is formed between the tops of the two transition surfaces, and the wind-breaking ridge extends along the windward surface to the leeward surface.

[0012] Furthermore, the base and the cover are connected by fasteners, and mounting portions are formed on both sides of the base;

[0013] Wherein, the front end of the base has a base windward surface.

[0014] Furthermore, the windward surface of the base includes two inclined surfaces, which are symmetrically distributed along the center line of the base and form a pointed mouth;

[0015] An air guide portion is formed above the pointed mouth portion and is transitionally matched with the windward surface.

[0016] Furthermore, an air guide structure is formed on the surface of the transition surface.

[0017] Furthermore, the air guide structure includes ribs formed on the smooth transition portion;

[0018] Two ribs are horizontally arranged on the smooth transition portion on each side, and the linear shape of the ribs is an arc curve with a low middle portion and high ends.

[0019] Furthermore, the air guide structure is an air guide cover;

[0020] The air guide cover is sleeved on the outer side of the housing and forms an air guide space with the outer wall of the housing. The front end of the air guide cover is located at the smooth transition portion.

[0021] Furthermore, the windward surface of the base includes two inclined surfaces, and the two inclined surfaces are distributed on the base in an eight-shaped structure, wherein the two inclined surfaces are transitionally matched with the windward surface.

[0022] Furthermore, a heat dissipation structure is formed between the base and the cover.

[0023] Furthermore, the heat dissipation structure includes a heat dissipation hole formed in the middle of the leeward surface, the heat dissipation hole is connected to the inner side of the cover, and is used to conduct heat away from the signal unit;

[0024] An air inlet is formed on the rear end side of the base. The air inlet is L-shaped and extends along the back end of the base to its upper surface. A circulating air duct is formed between the air inlet and the heat dissipation holes. A spoiler is also fixedly installed on the inner side of the cover.

[0025] Furthermore, two inwardly contracted inclined surfaces are formed on both sides of the rear end of the base, and the two inwardly contracted inclined surfaces are in an eight-shaped structure, and the inwardly contracted inclined surfaces are connected and transitioned to the leeward side.

[0026] The present invention proposes a high-speed train multi-service onboard low-wind-drag antenna, which has the following beneficial effects: the streamlined antenna structure designed in the present invention further optimizes its aerodynamic shape on the basis of the original antenna model, and has a significant drag reduction effect at the design wind speed, thus solving the problem that the current antenna cannot continue to meet the overall wind resistance requirements of the high-speed train. At the same time, the present invention also designs a heat dissipation structure for the antenna, so that while ensuring that the entire antenna reduces wind resistance, it can also achieve heat dissipation of the entire antenna's internal components to further ensure operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the antenna structure of the prior art;

[0028] Figure 2 This is a schematic structural diagram of embodiment 1 of the present invention;

[0029] Figure 3 This is a structural diagram of embodiment 2 of the present invention;

[0030] Figure 4 This is a schematic structural diagram of embodiment 3 of the present invention;

[0031] Figure 5 is a cross-sectional view of the cover of the present invention;

[0032] Figure 6 It is a schematic diagram of the heat dissipation structure of the present invention.

[0033] In the figure: 1. Base; 11. Mounting part; 12. Windward side of base; 121. Inclined surface; 122. Pointed mouth; 123. Air guide part; 13. Inward-retracted inclined surface; 2. Cover; 21. Windward side; 22. Leeward side; 23. Transition surface; 24. Smooth transition part; 25. Wind-breaking ridge; 26. Air guide structure; 3. Heat dissipation structure; 31. Heat dissipation holes; 32. Air inlet duct; 33. Spoiler. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1

[0036] Reference Figure 2This is one embodiment of the present invention, which discloses a high-speed train multi-service onboard low-wind resistance antenna. The antenna is used to further reduce wind resistance to meet the overall drag reduction requirements of high-speed trains. Specifically, the antenna includes a base 1, a signal unit, and a cover 2. The signal unit and the cover 2 are both mounted on the base 1, and the base 1 is used to be fixed to the train. The signal unit includes components such as an antenna, a positioning module, and a transceiver module. Its specific structure is prior art and will not be described in detail here.

[0037] The housing 2 includes a windward surface 21 formed at the front end and a leeward surface 22 formed at the rear end. Transition surfaces 23 are formed on both sides of the housing 2. Both the transition surface 23 and the leeward surface 22 are formed with smooth transition portions 24.

[0038] A wind-breaking ridge 25 is formed between the tops of the two transition surfaces 23 , and the wind-breaking ridge 25 extends along the windward surface 21 to the leeward surface 22 .

[0039] In some embodiments, the base 1 and the cover 2 of the present invention are connected by fasteners. Mounting portions 11 are formed on both sides of the base 1. The mounting portions 11 form an installation space. Mounting holes are formed on the end faces of the mounting portions 11. During connection, the antenna can be fixed to the train through the connection holes. In addition, the fasteners described in the present invention are preferably bolts.

[0040] The front end of the base 1 has a base windward surface 12 , that is, the present invention provides a base windward surface 12 on the end surface of the base 1 , which can be used to reduce the wind resistance of the base 1 to improve the overall drag reduction performance.

[0041] Preferably, the windward surface 12 of the base in this embodiment includes two inclined surfaces 121, which are symmetrically distributed along the center line of the base 1 and form a pointed mouth 122. Of course, the inclined surfaces 121 in this embodiment are set as a curved surface structure;

[0042] An air guide portion 123 is formed above the pointed mouth portion 122 and is transitionally matched with the windward surface 21 .

[0043] During specific operation, the airflow breaks through the wind along the pointed mouth 122 and the windward surface 21, and then flows out along the leeward surface 22 through the smooth transition portion 24 on the transition surface 23. Due to the streamlined design of the smooth transition portion 24, the smoothness of the airflow passing through at high speed can be ensured, thereby greatly reducing the overall wind resistance of the antenna when the train is running at high speed.

[0044] Specifically, in this embodiment, the antenna length is increased on the basis of the original antenna to reduce the front slope. At the same time, the windward surface 21 of the front end is designed as a pointed structure, and the surfaces on both sides of the cover 2 and the leeward surface 22 are smoothly transitioned. Compared with the original antenna structure, the front end of this antenna has a good streamlined structure. At the design wind speed, the forward wind resistance is 8.11N and the reverse wind resistance is 8.82N, which is about 76% less than the same period last year.

[0045] Reference Figure 2 、 Figure 5 、 Figure 6 On the basis of the above embodiment, a heat dissipation structure 3 is further formed between the base 1 and the cover 2 in the present invention.

[0046] Preferably, the heat dissipation structure 3 in this embodiment includes a heat dissipation hole 31 formed in the middle of the leeward surface 22. A plurality of heat dissipation holes 31 may be provided along a straight line in the middle of the leeward surface 22, the direction of the straight line being the height direction of the housing 2. The heat dissipation holes 31 are connected to the inner side of the housing 2 for dissipating heat from the signal unit.

[0047] An air inlet duct 32 is formed on the rear end side of the base 1. The air inlet duct 32 is L-shaped and extends along the back end of the base 1 to its upper surface. A circulating air duct is formed between the air inlet duct 32 and the heat dissipation holes 31. A spoiler 33 is also fixedly installed on the inner side of the cover 2. Specifically, the spoiler 33 is tilted and is used to convert the vertical upward airflow of the air inlet duct 32 into a horizontal airflow to ensure sufficient contact with the internal components. Thereafter, due to the negative pressure of the heat dissipation holes 31, the airflow is discharged laterally from the inner side of the cover 2 to achieve cooling of the components.

[0048] In addition, in the present invention, two inwardly contracted inclined surfaces 13 are formed on both sides of the rear end of the base 1 . The two inwardly contracted inclined surfaces 13 are in an eight-shaped structure, and the inwardly contracted inclined surfaces 13 are connected and transitioned to the leeward surface 22 .

[0049] Specifically, in the present invention, the design of the inward-retracted slope 13 is adopted to ensure that the high-speed airflow can be guided and merged after flowing out through the leeward side 22, which can greatly improve the working stability of the entire antenna. Secondly, due to the subsequent merging of the airflow, the wind resistance of the entire antenna when running at high speed is also reduced.

[0050] Furthermore, it should be noted that, in the embodiment of the present invention, the air inlet duct 32 is provided on the side of the inwardly contracted inclined surface 13 , with the purpose of reducing the influence of the airflow on the intake air.

[0051] Specifically, when the entire antenna is running, the signal unit on the base 1 will generate heat. When the train runs at high speed, high-speed airflow will flow through the surface of the cover 2. When the airflow flows along the transition portion 23 on the side of the cover 2 and merges to the leeward side 22, the airflow will form a negative pressure area on the leeward side 22. Therefore, through the design of this negative pressure area, the heat inside the entire cover 2 will be brought out through the heat dissipation holes 31, thereby achieving heat reduction inside the cover 2 to ensure the stability of the operation of the internal signal unit.

[0052] Of course, since the air inlet duct 32 is designed on the bottom of the base 1, the negative pressure effect is relatively small. Therefore, after the above-mentioned negative pressure area takes out the heat from the heat dissipation hole 31, the external air flow will enter the inner side of the cover 2 along the air inlet duct 32, and so on to achieve heat dissipation inside the cover 2.

[0053] The design of the heat dissipation structure 3 does not increase the wind resistance of the entire antenna, and therefore does not interfere with the working stability of the antenna.

[0054] Example 2

[0055] Reference Figure 3 、 Figure 6 Specifically, the similarities between this embodiment and embodiment 1 are not repeated here, and the difference is that: in this embodiment, the windward surface 12 of the base includes two inclined surfaces 121, and the two inclined surfaces 121 are distributed on the base 1 in an eight-shaped structure, wherein the two inclined surfaces 121 transitionally cooperate with the windward surface 21, and preferably, the inclined surface 121 described in this embodiment is set as an arc surface.

[0056] Specifically, in this embodiment, two inclined surfaces 121 with an eight-shaped structure are formed on the base 1 to achieve wind breaking, so as to cooperate with the windward surface 21 to reduce wind resistance.

[0057] In some embodiments, an air guide structure 26 is formed on the surface of the transition surface 23 of the present invention. The air guide structure 26 is provided to guide and accelerate the gas flow on both sides.

[0058] On the basis of the above embodiment, the air guide structure 26 in the embodiment of the present invention includes ribs formed on the smooth transition portion 24;

[0059] Two ribs are horizontally arranged on the smooth transition portion 24 on each side, and the linear shape of the ribs is an arc curve with a low middle portion and high ends.

[0060] Specifically, in this embodiment, the height of the antenna cover is lowered on the original basis. Due to the limited space for placing the antenna vibrator inside, the front and rear shapes are asymmetric structures. The surfaces on both sides of the cover 2 and the windward side 12 and leeward side 22 of the base are simultaneously smoothed. Furthermore, rib knots are added to the surfaces on both sides of the antenna to respectively guide and accelerate the gas flow on the separated flows on both sides.

[0061] Specifically, in this embodiment, two rib structures are added at the same time after the surfaces on both sides of the original model are streamlined. The front and rear ends of the ribs are located in the flow separation areas on the front and rear sides of the antenna. The overall line shape presents an arc curve with "low in the middle and high at both ends". At the design wind speed, the forward wind resistance is 8.13N and the reverse wind resistance is 9.12N, which is a year-on-year drag reduction of approximately 75.3%.

[0062] Example 3

[0063] Reference Figure 4 In this embodiment, the similarities with the first and second embodiments are not repeated here, and the difference is that: in this embodiment, the air guide structure 26 is an air guide cover;

[0064] The air guide cover is sleeved on the outside of the housing 2 and forms an air guide space with the outer wall of the housing 2 . The front end of the air guide cover is located at the smooth transition portion 24 .

[0065] Specifically, the wind guide cover in this embodiment is connected to the main structure through the bottom connection, and the rest of the parts are hollowed out. The front and rear end openings of the wind guide cover are roughly located in the separation area of ​​the main antenna flow. At the design wind speed, the forward wind resistance of this type of antenna is 14.93N, and the reverse wind resistance is 16.10N, which is a year-on-year drag reduction of about 57%.

[0066] In summary, the streamlined antenna structure designed in the present invention further optimizes its aerodynamic shape based on the original antenna model, and has a significant drag reduction effect at the design wind speed, thus solving the problem that the current antenna cannot continue to meet the overall wind resistance requirements of high-speed trains. At the same time, the present invention also designs a heat dissipation structure 3 for the antenna, so that while ensuring that the entire antenna reduces wind resistance, it can also achieve heat dissipation of the entire antenna's internal components to further ensure operational stability.

[0067] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0068] Further, the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0069] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

Claims

1. A high-speed train multi-service vehicle-mounted low wind resistance antenna, characterized in that: include: A base (1), a signal unit and a cover (2), wherein the signal unit and the cover (2) are both mounted on the base (1); The cover shell (2) includes a windward surface (21) formed at the front end and a leeward surface (22) formed at the rear end, and transition surfaces (23) are formed on both sides of the cover shell (2), and the surfaces of the transition surface (23) and the leeward surface (22) are both formed with smooth transition portions (24); A wind-breaking ridge (25) is formed between the tops of the two transition surfaces (23), and the wind-breaking ridge (25) extends along the windward surface (21) to the leeward surface (22). The base (1) and the cover (2) are connected by fasteners, and mounting portions (11) are formed on both sides of the base (1). The front end of the base (1) has a base windward surface (12), and the base windward surface (12) includes two inclined surfaces (121). The two inclined surfaces (121) are symmetrically distributed along the center line of the base (1) and form a pointed mouth (122). An air guide portion (123) is formed above the pointed mouth portion (122) and is transitionally matched with the windward surface (21). The front end of the pointed mouth portion (122) is a sharp point, and an edge is formed between the two inclined surfaces (121).

2. The high-speed train multi-service onboard low wind resistance antenna according to claim 1, characterized in that: An air guide structure (26) is also formed on the surface of the transition surface (23).

3. The high-speed train multi-service onboard low wind resistance antenna according to claim 2, characterized in that: The air guide structure (26) includes a rib formed on the smooth transition portion (24); Two ribs are horizontally arranged on the smooth transition portion (24) on each side, and the linear shape of the ribs is an arc curve with a low middle portion and high ends.

4. The high-speed train multi-service onboard low wind resistance antenna according to claim 2, characterized in that: The air guide structure (26) is an air guide cover; The air guide cover is sleeved on the outside of the housing (2) and forms an air guide space with an outer wall of the housing (2). The front end of the air guide cover is located at the smooth transition portion (24).

5. The high-speed train multi-service onboard low wind resistance antenna according to claim 1, characterized in that: A heat dissipation structure (3) is also formed between the base (1) and the cover shell (2).

6. The high-speed train multi-service onboard low wind resistance antenna according to claim 5, characterized in that: The heat dissipation structure (3) comprises a heat dissipation hole (31) formed in the middle of the leeward surface (22), wherein the heat dissipation hole (31) is connected to the inner side of the housing (2) and is used to dissipate heat from the signal unit; An air inlet duct (32) is formed on the rear end side of the base (1). The air inlet duct (32) is L-shaped and extends along the back end of the base (1) to its upper surface. A circulating air duct is formed between the air inlet duct (32) and the heat dissipation holes (31). A spoiler (33) is also fixedly mounted on the inner side of the cover shell (2).

7. The high-speed train multi-service onboard low wind resistance antenna according to claim 1, characterized in that: Two inwardly contracted inclined surfaces (13) are formed on both sides of the rear end of the base (1), and the two inwardly contracted inclined surfaces (13) are in an eight-shaped structure. The inwardly contracted inclined surfaces (13) are connected and transitioned to the leeward surface (22).

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