Railway wagon bogie axle end protection grounding device and installation method

Abstract

The present application belongs to the technical field of railway vehicle grounding protection, and particularly relates to a railway wagon bogie axle end protection grounding device and a mounting method. The railway wagon bogie axle end protection grounding device comprises a rotating body fixed at the axle end, a conductive cylinder rotatably arranged on the rotating body, the rotating body and the conductive cylinder being in contact with each other and conducting electricity, a terminal stop arranged on the rotating body, the terminal stop being used for axially limiting the conductive cylinder, an electric connection wire connected to the conductive cylinder, and the electric connection wire being used for connecting with a bearing saddle or a side frame of the bogie, so as to guide the electricity on the bearing saddle or the side frame into the ground through the rotating body and the axle. The present application effectively solves the protective grounding of the tank wagon for transporting special flammable and explosive goods, and avoids the damage to the bearing and the dust and powder pollution. The structure is simple and compact, the principle is simple, the axle end lock washer can be simply transformed and mounted, the manufacturing and maintenance are simple, the cost is low, and the present application can be widely applied.

Description

Technical Field

[0001] This invention belongs to the field of railway vehicle grounding protection technology, and particularly relates to a protective grounding device and installation method for the axle end of a railway freight car bogie. Background Technology

[0002] Grounding protection for metal components of railway vehicles is divided into protective grounding, functional grounding, and electromagnetic compatibility grounding. Grounding devices should be used between the bogie frame (side frame) and wheelsets to protect bearings and prevent electrolytic corrosion. For passenger cars and urban rail vehicles, grounding is mainly functional grounding. For freight cars, which are not energized on board, grounding is mainly protective grounding, conducting static electricity from the vehicle to the rails. Currently, grounding devices on passenger cars are mainly installed at the axle end, using an axle box to completely enclose the bearing. The axle end grounding device is installed inside the front cover of the axle box, with the wear plate fixed to the axle end and rotating with the axle. The carbon brush structure is fixed to the front cover of the axle box and does not rotate. During vehicle operation, current is conducted through the mutual wear between the carbon brush and the wear plate. This structure can withstand strong current loads and is suitable for structures with axle boxes, but it is complex and costly.

[0003] Chinese invention patent application CN115027521A discloses a load-bearing saddle assembly suitable for mounting an axle end grounding device on a freight car bogie. This axle end grounding device increases the strength requirements of important components of the load-bearing saddle by drilling bolt holes on the load-bearing saddle. Installing a grounding device with a complex structure and relatively large weight relative to the load-bearing saddle itself on one side of the load-bearing saddle will cause the load-bearing saddle to tilt to the heavier side during installation, increasing the installation difficulty and the risk of damaging the bearing outer ring. During use, due to wheel-rail vibration and fretting wear of the load-bearing saddle and the bearing outer ring, the force distribution on both sides of the load-bearing saddle is uneven, which can easily cause accelerated wear of the bearing outer ring.

[0004] Chinese invention patent application CN108058718A discloses a new type of high-speed train bogie axle end grounding device that is not suitable for current railway passenger car bogies. The bearings are exposed, and the installation of the three major components of railway freight car bogies, which are equipped with load-bearing saddles, is complex, costly, inconvenient to install and maintain, and will cause dust pollution after the carbon brushes wear out. Summary of the Invention

[0005] The purpose of this invention is to provide a protective grounding device and installation method for the axle end of a railway freight car bogie, which effectively solves the problem of protective grounding for some tank cars transporting special flammable and explosive goods, and avoids damage to the bearings and dust pollution. The structure is simple and compact, the principle is simple, and it can be installed by simply modifying the anti-loosening gasket at the axle end. It is easy to manufacture and maintain, convenient and low in cost, and can be widely used.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a protective grounding device for the axle end of a railway freight car bogie, comprising a rotating body fixed to the end of the axle, a conductive cylinder rotatably mounted on the rotating body, the rotating body and the conductive cylinder being in contact with each other and conducting electricity, a stop being provided on the rotating body for axially limiting the conductive cylinder, and a grounding wire connected to the conductive cylinder for connecting to the bogie's bearing saddle or side frame, thereby conducting electricity from the bearing saddle or side frame to the ground through the rotating body and the axle.

[0007] In some embodiments, the rotating body includes a conductive bolt, the conductive cylinder includes a stripped nut, and the conductive cylinder cannot be unscrewed from the rotating body due to stripping.

[0008] In some embodiments, the surfaces of the rotating body and the conductive cylinder that come into contact with each other are coated with a conductive medium.

[0009] In some embodiments, a protective cover is included, both the protective cover and the rotating body are fixed to the anti-loosening gasket at the axle end, and the rotating body is disposed inside the protective cover.

[0010] Furthermore, a hole is opened at the end of the protective cover away from the anti-loosening gasket at the shaft end, and a conductive wire is provided at one end of the conductive cylinder. The conductive wire passes through the hole and is connected to the connecting wire.

[0011] Furthermore, a fan is fixedly installed on the rotating body, and the fan can rotate together with the rotating body. The fan is arranged at the end of the conductive cylinder away from the hole.

[0012] Furthermore, a rubber sleeve is provided on the inner wall of the hole.

[0013] In some embodiments, the connecting wire includes a helical spring.

[0014] Furthermore, the rotating body is arranged coaxially with the axle.

[0015] Secondly, the present invention provides a method for installing a protective grounding device for the axle end of a railway freight car bogie, comprising:

[0016] The rotating body is fixed to the anti-loosening washer at the shaft end by means of threading or welding;

[0017] Install the fan onto the rotating body, insert the conductive cylinder into the rotating body from the end away from the anti-loosening shim at the shaft end, and install the second stop at the end of the rotating body away from the anti-loosening shim at the shaft end;

[0018] Install the protective cover on the anti-loosening washer at the shaft end, and make sure that the conductive wires on the conductive cylinder pass through the holes in the protective cover.

[0019] Connect one end of the connecting wire to the conductive wire, and connect the other end of the connecting wire to the load-bearing saddle or side frame.

[0020] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0021] 1. The present invention has a simple structure, is lightweight, will not damage the bearing, and will not cause dust pollution.

[0022] 2. The rotating body of the present invention can be made of conductive bolts, and the conductive cylinder can be made of stripped nuts. Because the conductive cylinder cannot be unscrewed from the rotating body due to stripping, the rotating body and the conductive cylinder can rotate relative to each other and make contact for conduction.

[0023] 3. By setting up a protective cover, the present invention can not only prevent dust, but also prevent stones and other debris from hitting the rotating body and conductive cylinder during operation.

[0024] 4. By installing rubber sleeves on the holes of the protective cover, the present invention can provide appropriate cushioning during the operation of the aircraft.

[0025] 5. By incorporating a fan that rotates along with the rotating body, the airflow generated by the fan blows towards the conductive cylinder and the holes. While dissipating heat, the fan also prevents dust from entering the protective cover through the holes.

[0026] 6. This invention can be installed on the axle ends of different types of bogies. Only a simple modification is needed to the anti-loosening shims at the axle ends. No other modifications to the bogie are required, making it widely applicable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the protective cover of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the protective cover of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the anti-loosening washer at the shaft end of the present invention;

[0031] Figure 5 This is a schematic diagram of the rotating structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the conductive cylinder of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure after the present invention is installed on the axle end of the bogie.

[0034] Reference numerals: 1. Protective cover; 11. Groove; 12. Hole; 2. Shaft end anti-loosening washer; 3. Connecting wire; 4. Bolt; 5. Rotating body; 51. Mounting groove; 52. First stop; 53. Second stop; 6. Fan; 7. Conductive cylinder; 71. Stripped nut; 72. Conductive wire; 73. Connecting hole. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but these embodiments should not be construed as limiting the present invention.

[0036] like Figure 2 As shown, this invention provides a protective grounding device for the axle end of a railway freight car bogie, including a rotating body 5 fixed to the end of the axle (i.e., the bogie axle end). The rotating body 5 is cylindrical and coaxially arranged with the axle. A conductive cylinder 7 is rotatably mounted on the rotating body 5. The rotating body 5 and the conductive cylinder 7 are in contact with each other and conduct electricity. The length of the conductive cylinder 7 is less than the length of the rotating body 5. Figure 5 As shown, the rotating body 5 is equipped with a stop, which includes a first stop 52 and a second stop 53. The first stop 52 is an integral structure with the rotating body 5, and the second stop 53 is connected to the rotating body 5 by welding, slotting, or other means. The stop is used to limit the axial movement of the conductive cylinder 7, so that the conductive cylinder 7 cannot be removed from the rotating body 5. A connecting wire 3 is connected to the conductive cylinder 7. The connecting wire 3 is used to connect to the load-bearing saddle or side frame of the bogie, and to conduct the electricity on the load-bearing saddle or side frame to the ground through the rotating body 5 and the axle.

[0037] Understandably, when the train is running, the rotating body 5 rotates along with the axle. The electricity on the car body is conducted to the bogie, then to the bearing saddle and side frame, and then through the connecting wire 3 to the conductive cylinder 7. Since the rotating body 5 and the conductive cylinder 7 are in contact and conductive, the electricity can be conducted to the rails through the rotating body 5 and the axle, and finally to the ground. This structure is simple, lightweight, will not damage the bearings, and will not cause dust pollution.

[0038] In some embodiments, the rotating body 5 is a conductive bolt, and the conductive cylinder 7 is a stripped nut 71. The conductive cylinder 7 cannot be unscrewed from the rotating body 5 due to stripping.

[0039] In some embodiments, to enhance conductivity, the surfaces of the rotating body 5 and the conductive cylinder 7 that come into contact with each other are coated with a conductive medium, such as graphite.

[0040] In some embodiments, such as Figure 1 As shown, it also includes a protective cover 1. Both the protective cover 1 and the rotating body 5 are fixed on the anti-loosening gasket 2 at the axle end, and the rotating body 5 is set inside the protective cover 1. The protective cover 1 can not only prevent dust, but also prevent stones and other debris from the rails from hitting the rotating body 5 and the conductive cylinder 7 during operation.

[0041] The rotating body 5 can be fixed to the anti-loosening washer 2 at the shaft end by means of thread or welding, and the protective cover 1 is fixed to the anti-loosening washer 2 at the shaft end by bolts 4.

[0042] like Figure 3As shown, a groove 11 is formed at the bottom of the protective cover 1, and a sealing ring is placed in the groove 11. A hole 12 is formed at the top of the protective cover 1, and a rubber sleeve is placed on the inner wall of the hole 12. Figure 6 As shown, a conductive wire 72 is provided at one end of the conductive cylinder 7. The conductive wire 72 passes through the hole 12 and connects to the connecting wire 3. The conductive wire 72 is tightly attached to the rubber sleeve. A connecting hole 73 is opened at one end of the conductive wire 72 passing through the hole 12. One end of the connecting wire 3 can be connected to the connecting hole 73 by hooking or wrapping, which is simple to install and easy to disassemble. The other end of the connecting wire 3 can be wrapped, clamped, or threaded to the side frame or load-bearing saddle, so that the current on it can be introduced into the axle end and then into the wheel through the axle, avoiding flow into the bearing. Figure 7 As shown.

[0043] Understandably, both the sealing ring and the rubber sleeve can improve the sealing performance of the protective cover 1 and prevent external impurities from entering the protective cover 1. At the same time, the rubber sleeve can also play a buffering role.

[0044] To prevent excessively high temperatures inside the protective cover 1 and to reduce dust entering the protective cover 1 through the holes 12, such as Figure 1 , 5 As shown, a mounting slot 51 is provided on the rotating body 5, and a fan 6 is fixedly installed on the mounting slot 51. The fan 6 can rotate together with the rotating body 5. The fan 6 is arranged at the end of the conductive cylinder 7 away from the hole 12. During train operation, the fan 6 rotates together with the rotating body 5, and the airflow generated by the fan 6 blows towards the conductive cylinder 7 and the hole 12. While dissipating heat, the fan 6 can also prevent dust from entering the protective cover 1 through the hole 12.

[0045] In some embodiments, the connecting wire 3 includes a helical spring. During train operation, the helical spring provides some shock absorption.

[0046] The working principle of the protective grounding device at the axle end of the railway freight car bogie is as follows:

[0047] When the train is running, the current on the car body is conducted to the bogies, then to the load-bearing saddles and side frames, and finally to the conductive cylinder 7 via the connecting wire 3. The stripped nut 71 rotates relative to the rotating body 5, while the conductive wire 72 on the conductive cylinder 7 remains stationary relative to the rotating body 5 through the stripped nut 71, conducting the current to the rotating body 5, then to the axle end anti-loosening washer 2, and finally to the axle. Simultaneously, the fan 6 rotates with the rotating body 5, and the airflow generated by the fan 66 helps to cool the vehicle and disperse external dust, preventing it from entering the protective cover 1. When the train is stationary, the fan 6 stops rotating, and the rotating body 5 and the stripped nut 71 stop rotating relative to each other, directly contacting each other to transfer current.

[0048] This invention provides a method for installing a protective grounding device for the axle end of a railway freight car bogie, comprising:

[0049] The rotating body 5 is fixed to the anti-loosening washer 2 at the shaft end by means of threading or welding;

[0050] Install the fan 6 onto the rotating body 5, insert the conductive cylinder 7 into the rotating body 5 from the end away from the shaft end anti-loosening washer 2, and install the second stop 53 at the end of the rotating body 5 away from the shaft end anti-loosening washer 2.

[0051] Install the protective cover 1 on the anti-loosening washer 2 at the shaft end, and make the conductive wire 72 on the conductive cylinder 7 pass through the hole 12 of the protective cover 1.

[0052] Connect one end of the connecting wire 3 to the conductive wire 72, and connect the other end of the connecting wire 3 to the bearing saddle or side frame.

[0053] like Figure 4 As shown, the railway freight car bogie axle end protective grounding device only requires a few threaded holes for installing the protective cover 1 on the axle end anti-loosening gasket 2, and can be installed on the bogie axle end without any modification to the bogie, making it widely applicable.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective grounding device for the axle end of a railway freight car bogie, characterized in that: Includes a rotating body (5) fixed to the end of the axle, on which a conductive cylinder (7) is rotatably mounted. The rotating body (5) and the conductive cylinder (7) are in contact with each other and conduct electricity. A stop is provided on the rotating body (5) to limit the axial movement of the conductive cylinder (7). A connecting wire (3) is connected to the conductive cylinder (7) to connect to the bogie's support saddle or side frame, so that the electricity on the support saddle or side frame is conducted to the ground through the rotating body (5) and the axle. It also includes a protective cover (1), both the protective cover (1) and the rotating body (5) are fixed on the anti-loosening pad (2) at the axle end, and the rotating body (5) is set inside the protective cover (1); The protective cover (1) has a hole (12) at the end away from the anti-loosening gasket (2) at the shaft end, and a conductive wire (72) is provided at one end of the conductive cylinder (7). The conductive wire (72) passes through the hole (12) and is connected to the connecting wire (3). A fan (6) is fixedly installed on the rotating body (5). The fan (6) can rotate together with the rotating body (5). The fan (6) is arranged at the end of the conductive cylinder (7) away from the hole (12).

2. The railway freight car bogie axle end protective grounding device according to claim 1, characterized in that: The rotating body (5) includes a conductive bolt, and the conductive cylinder (7) includes a stripped nut (71). The conductive cylinder (7) cannot be unscrewed from the rotating body (5) due to stripping.

3. The railway freight car bogie axle end protective grounding device according to claim 1, characterized in that: The surfaces of the rotating body (5) and the conductive cylinder (7) that come into contact with each other are coated with a conductive medium.

4. The railway freight car bogie axle end protective grounding device according to claim 1, characterized in that: A rubber sleeve is provided on the inner wall of the hole (12).

5. The railway freight car bogie axle end protective grounding device according to any one of claims 1 to 3, characterized in that: The connecting wire (3) includes a helical spring.

6. The railway freight car bogie axle end protective grounding device according to any one of claims 1 to 3, characterized in that: The rotating body (5) is arranged coaxially with the axle.

7. A method for installing a protective grounding device for the axle end of a railway freight car bogie according to any one of claims 1 to 6, characterized in that: include: The rotating body (5) is fixed to the anti-loosening washer (2) at the shaft end by means of thread or welding; Install the fan (6) onto the rotating body (5), insert the conductive cylinder (7) from the end of the rotating body (5) away from the anti-loosening pad (2) at the shaft end, and install the second stop (53) at the end of the rotating body (5) away from the anti-loosening pad (2) at the shaft end. Install the protective cover (1) on the anti-loosening washer (2) at the shaft end, and make the conductive wire (72) on the conductive cylinder (7) pass through the hole (12) of the protective cover (1). Connect one end of the connecting wire (3) to the conductive wire (72), and connect the other end of the connecting wire (3) to the bearing saddle or side frame.

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