A novel integrated pantograph device for improving the rate of frictional heat dissipation

Abstract

This invention relates to a novel integrated pantograph device for improving the rate of frictional heat dissipation. The device includes a pantograph head, which comprises a pantograph head support and a carbon sliding plate. The pantograph head also includes cylindrical cavities disposed at the four corners of the pantograph head support, and an airflow-type carbon sliding plate support spanning and connecting adjacent cylindrical cavities. The airflow-type carbon sliding plate support has an upward-facing opening and ventilation holes on its front and rear side walls. The carbon sliding plate is rotatably disposed between the cylindrical cavities, with a portion of the carbon sliding plate located within the opening of the airflow-type carbon sliding plate support. Based on a novel pantograph head structure, this invention utilizes a carbon sliding plate support designed to achieve airflow, which, in conjunction with small impellers arranged at the four corners of the pantograph, accelerates airflow around the carbon sliding plate, improving the dissipation of high-temperature friction between the pantograph and the contact wire, reducing heat radiation corrosion and wear on the carbon sliding plate, and extending its service life.

Description

Technical Field

[0001] This patent belongs to the field of railway passenger car energy device technology, and in particular relates to a novel integrated pantograph device that improves the speed of frictional heat dissipation. Background Technology

[0002] The pantograph is one of the most widely used energy devices in railway passenger cars. Its working principle mainly relies on the cooperation of various linkage mechanisms to bring the carbon sliding plate of the pantograph head to a certain height, thereby achieving pantograph-catenary current collection contact and ensuring the stability of the train's power source. Currently, technological development in this field mainly focuses on improving the pantograph-catenary dynamic performance, enhancing the quality of pantograph-catenary current collection, and refining the pantograph's basic structure.

[0003] The existing technology has the following main drawbacks:

[0004] 1) The large amount of heat radiation generated by the friction between the bow and the catenary cannot be dissipated in time. At the same time, the large amount of heat radiation will intensify the reaction between the elements inside the carbon slide plate and the air, resulting in increased wear of the carbon slide plate and reduced service life of the carbon slide plate.

[0005] 2) Currently, the pantograph itself has poor integration performance and cannot monitor the current collection status of the pantograph-catenary system in real time. Additional monitoring equipment needs to be installed on the roof, which increases the number of roof equipment interfaces and limits the improvement of the roof structure's manufacturability.

[0006] A search revealed Chinese utility model patent CN210161914U, which discloses a self-lubricating modular metal roller pantograph head for electric locomotives with a shock-absorbing structure. By changing the friction pattern of the pantograph and catenary, it improves the adaptability of train traction power and also helps extend the service life of the carbon sliding plate. Chinese invention patent application CN111137135A discloses a multi-metal roller type rigid contact rail current collection device for electric locomotives. Through the cooperation of a long strip carbon slider, a current collection shoe, and multi-metal rollers, it achieves stability in pantograph-catenary current collection and improves the problem of frequent arcing between the carbon sliding plate and the contact rail caused by uneven rail surfaces. However, these patents do not fundamentally solve the heat dissipation problem of pantograph-catenary contact. Summary of the Invention

[0007] The technical problem to be solved by this patent is to overcome the shortcomings of the prior art and provide a new integrated pantograph device that improves the speed of frictional heat dissipation. By designing a carbon slide bracket that enables airflow and cooperating with the small blades arranged at the four corners of the pantograph, the airflow around the carbon slide is accelerated, the heat dissipation effect of the pantograph-catenary friction is improved, the wear of the carbon slide is reduced, and the service life of the carbon slide is increased.

[0008] The technical solution adopted by this patent to solve its technical problem is: a novel integrated pantograph device for improving the speed of frictional heat dissipation, including a pantograph head, the pantograph head including a pantograph head bracket and a carbon sliding plate, characterized in that: the pantograph head also includes cylindrical cavities disposed at the four corners of the pantograph head bracket, and an airflow carbon sliding plate bracket spanning and connecting adjacent cylindrical cavities, the airflow carbon sliding plate bracket having an opening facing upward and ventilation holes on the front and rear side walls, the carbon sliding plate being rotatably disposed between the cylindrical cavities, and the carbon sliding plate portion being located within the opening of the airflow carbon sliding plate bracket.

[0009] As a further improvement, the upper arm includes a horn mounting bracket, a pantograph-catenary monitoring device, an upper arm telescopic rod, and an upper arm telescopic rod sleeve. The horn mounting bracket is fixed to the top of the upper arm telescopic rod, and the pantograph-catenary monitoring device is installed on both sides of the top. The upper arm telescopic rod is connected to the upper arm telescopic rod sleeve through a sliding pair.

[0010] Compared to traditional pantograph structures, the beneficial effects of this patent include:

[0011] 1) Based on the new bow head structure, a carbon slide bracket that enables airflow is designed and works in conjunction with small impellers arranged at the four corners of the pantograph to accelerate the airflow around the carbon slide, improve the dissipation effect of high temperature from pantograph-catenary friction, reduce the corrosion and wear of the carbon slide by heat radiation, and extend the service life of the carbon slide.

[0012] 2) Based on the monitoring equipment at the end of the upper boom, real-time monitoring of the pantograph-catenary contact status and the surrounding operating environment can be achieved. This structure improves the integration of the pantograph, while reducing the layout interface of the pantograph-catenary monitoring equipment on the roof and improving the manufacturability of the roof structure. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the extended state of the novel integrated pantograph device of the present invention, which improves the speed of frictional heat dissipation.

[0014] Figure 2 is a schematic diagram of the lowered state of the novel integrated pantograph device of the present invention, which improves the rate of frictional heat dissipation.

[0015] Figure 3 This is a schematic diagram of the bow head of the device of the present invention.

[0016] Figure 4 yes Figure 3 Enlarged view of area A.

[0017] Figure 5 This is a schematic diagram of the impeller of the device of the present invention.

[0018] Figure 6 This is a schematic diagram of the upper arm of the device of the present invention.

[0019] Figure 7 This is a schematic diagram of the airflow direction between the bow head bracket and the carbon plate bracket during vehicle operation.

[0020] The labels in the diagram are as follows:

[0021] 1. Bow head; 1-1 Bow head bracket; 1-2 Carbon sliding plate; 1-3 Bow head horn; 1-4 Carbon sliding plate bracket; 1-5 Impeller; 2. Upper boom; 2-1 Horn mounting bracket; 2-2 Bow-catenary monitoring equipment; 2-3 Upper boom telescopic rod; 2-4 Upper boom telescopic rod sleeve; 3. Lower boom; 4. Tie rod; 5. Base frame. Detailed Implementation

[0022] 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.

[0023] like Figure 1 , Figure 2 As shown, a novel integrated pantograph device for improving the speed of frictional heat dissipation includes a base frame 5, a lower arm 5, an upper arm 5, a tie rod 2, a connecting rod 4, and a pantograph head 1. The base frame 5, lower arm 5, upper arm 5, and tie rod 4 are sequentially connected in pairs to form a four-bar linkage. Specifically, the upper arm 5 is rotatably connected to the lower arm 5 and the tie rod 4 via pins, and the lower ends of the lower arm 5 and the tie rod 4 are rotatably connected to the base frame 5 via pins. The base frame 5 is fixed to the roof of the vehicle.

[0024] like Figure 3 As shown, the bow head 1 includes a bow head bracket 1-1, a carbon sliding plate 1-2, and a bow head horn 1-3 spanning the middle of the bow head bracket 1-1. The bow head 1 is fixed to the top of the upper arm 2 via the bow head horn 1-3. The bow head 1 also includes cylindrical cavities at the four corners of the bow head bracket 1-1 and an airflow carbon sliding plate bracket 1-4 spanning and connecting adjacent cylindrical cavities. The airflow carbon sliding plate bracket 1-4 has an upward-facing opening and ventilation holes on its front and rear side walls. The carbon sliding plate 1-2 is rotatably disposed between the cylindrical cavities, and a portion of the carbon sliding plate 1-2 is located within the opening of the airflow carbon sliding plate bracket 1-4. Figure 4 As shown, the front and rear sides of the cylindrical cavity are provided with mesh holes for ventilation, and impellers 1-5 (such as...) are rotatably installed inside the cylindrical cavity to generate turbulent airflow. Figure 5(As shown). The impeller 1-5 is fixed inside the cavity by means of a rotating pair. On this basis, the airflow carbon slide bracket 1-4 is fixed inside the two columnar cavities perpendicular to the vehicle running direction by means of welding, etc., and ensures that the internal air duct of the airflow carbon slide bracket 1-4 completely covers the mounting interface of the inner carbon slide 1-2, the mounting interface of the impeller 1-5, and the air outlet (see below).

[0025] In addition, ventilation holes are made on the surface of the cylindrical cavity structure along the vehicle's direction of travel to facilitate airflow during vehicle operation. Specifically, for example... Figure 4 As shown, the cylindrical cavity has an air outlet that communicates with the opening of the airflow-type carbon slide bracket 1-4. Part of the airflow generated by the rotation of the impeller 1-5 enters the opening through this air outlet. The shaft of the carbon slide 1-2 is higher than the shaft of the impeller 1-5.

[0026] Based on the above structure, to ensure that the present invention can receive current normally, the carbon slide plate 1-2 is designed to be fixed by a rotating pair. To avoid dangerous accidents such as drilling during operation, mounting holes are provided in the middle of both sides of the bow head bracket 1-1, and the bow head horn 1-3 is fixed to the bow head bracket 1-1 through these mounting holes, thereby ensuring the integrity of the bow head assembly 1 of the present invention.

[0027] like Figure 6 As shown, the upper arm 2 includes a horn-mounted support 2-1, a pantograph-catenary monitoring device 2-2, an upper arm telescopic rod 2-3, and an upper arm telescopic rod sleeve 2-4. The upper arm telescopic rod 2-3 is connected to the upper arm telescopic rod sleeve 2-4 via a sliding joint. The upper arm telescopic rod sleeve 2-4 is hinged to the lower arm 3 and the pull rod 4, respectively. The horn-mounted support 2-1 is fixed to the top of the upper arm telescopic rod 2-3, and the pantograph-catenary monitoring device 2-2 is installed on both sides of the top. The pantograph-catenary monitoring device 2-2 is connected to the upper arm telescopic rod 2-3 via pins. Through the above structural connection, real-time monitoring of the pantograph-catenary contact status and the roof environment can be achieved, and the integrity of the pantograph structure of this invention can be ensured.

[0028] During the basic lifting and lowering process of this invention, the lower arm 3 is driven by a driving force and rotates around the base frame 5 through a pin, thereby driving the upper arm telescopic sleeve 2-4 to rotate to a certain angle. At the same time, the moving pair composed of the upper arm telescopic rod 2-3 and the upper arm telescopic sleeve 2-4 can adjust the total length in real time according to the height of the contact wire, thereby adjusting the working height of the bow head 1 and ensuring that the contact force between the bow and the contact wire is within the specified range.

[0029] As the vehicle moves forward in its direction of travel, airflow enters the cylindrical cavity structure and the internal air duct of the airflow-type carbon slide bracket 1-4 on the windward side of the bow head 1. Simultaneously, the small impeller 1-5 inside the cylindrical cavity rotates under the influence of the airflow, disturbing the airflow within the cavity and guiding it towards the internal air duct of the airflow-type carbon slide bracket 1-4. This strengthens the airflow within the duct, improving the efficiency of heat dissipation from the friction of the carbon slide bracket 1-2. The remaining airflow and the dissipated airflow continue to exit the cavity and duct along the airflow direction, providing space for subsequent fresh air replenishment. This further increases the heat dissipation rate of the friction of the pantograph and catenary, reduces the impact of heat radiation on the wear of the carbon slide bracket, and extends its service life. A schematic diagram of the airflow direction of the bow head bracket and carbon slide bracket during vehicle operation is shown below. Figure 7 .

[0030] Based on the above structure, the pantograph-catenary monitoring device 2-2 can be adjusted in real time through the monitoring facilities inside the vehicle at any height of pantograph operation. It can rotate 360° around both sides of the end of the upper arm telescopic rod 2-3 via the pin shaft, which can monitor the contact status of pantograph-catenary and the external working environment of the vehicle in real time. While reducing the number of roof equipment and interface designs, it also reduces the installation and workload of roof equipment and improves the design manufacturability of the roof structure.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated pantograph device for improving the rate of frictional heat dissipation, comprising a pantograph head (1), wherein the pantograph head (1) includes a pantograph head support (1-1) and a carbon sliding plate (1-2), characterized in that: The bow head (1) also includes cylindrical cavities disposed at the four corners of the bow head bracket (1-1) and an airflow carbon slide bracket (1-4) spanning and connecting adjacent cylindrical cavities. The airflow carbon slide bracket (1-4) has an opening facing upward and ventilation holes are provided on the front and rear side walls. The carbon slide (1-2) is rotatably disposed between the cylindrical cavities, and part of the carbon slide (1-2) is located inside the opening of the airflow carbon slide bracket (1-4). The cylindrical cavity has mesh holes for ventilation on its front and rear sides. An impeller (1-5) for generating turbulent airflow is rotatably installed inside the cylindrical cavity. The cylindrical cavity has an air outlet that communicates with the opening of the airflow carbon slide bracket (1-4). Part of the airflow generated by the rotation of the impeller (1-5) enters the opening through the air outlet.

2. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 1, characterized in that: The shaft of the carbon slide (1-2) is higher than the shaft of the impeller (1-5).

3. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 1, characterized in that: The bow head bracket (1-1) is provided with a bow head ram's horn (1-3) spanning across the middle.

4. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 2, characterized in that: It also includes a base frame (5), a lower arm (3), an upper arm (2) and a tie rod (4). The base frame (5), the lower arm (3), the upper arm (2) and the tie rod (4) are connected in pairs to form a four-bar linkage. The base frame (5) is fixed to the roof of the vehicle, and the bow head (1) is fixed to the top of the upper arm (2) through the bow head horns (1-3).

5. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 4, characterized in that: The upper arm (2) includes a horn mounting bracket (2-1), a pantograph-catenary monitoring device (2-2), an upper arm telescopic rod (2-3), and an upper arm telescopic rod sleeve (2-4). The horn mounting bracket (2-1) is fixed to the top of the upper arm telescopic rod (2-3), and the pantograph-catenary monitoring device (2-2) is installed on both sides of the top. The upper arm telescopic rod (2-3) is connected to the upper arm telescopic rod sleeve (2-4) through a sliding pair.

6. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 5, characterized in that: The pantograph-catenary monitoring device (2-2) is connected to the upper arm telescopic rod (2-3) via a pin.

7. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 6, characterized in that: The upper arm telescopic sleeve (2-4) is hinged to the lower arm rod (3) and the pull rod (4) respectively.

8. The integrated pantograph device for improving the rate of frictional heat dissipation according to claim 7, characterized in that: The lower ends of the tie rod (4) and the lower arm (3) are rotatably connected to the base frame (5) by pins.

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