Railway wagon shaft end power generation device

Abstract

The utility model discloses a railway wagon shaft end power generation device which comprises a generator assembly and a connecting shaft, and the generator assembly comprises a rear cover assembly, a rotor assembly and a front cover assembly. A coil assembly is fixed to the inner side of the front cover assembly and comprises a plurality of coils, and the adjacent coils are opposite in rotation direction and connected with each other. The rotor assembly comprises a hollow shaft, a magnet disc and a plurality of permanent magnets; the two ends of the hollow shaft are connected with the rear cover assembly and the front cover assembly in a sealed and rotating mode respectively. The magnet disc is fastened at the middle section of the hollow shaft to form a rotor main body, the plurality of permanent magnets are distributed on the magnet disc and face one side of the front cover assembly, and the magnetic pole directions of the adjacent permanent magnets are opposite; the number of the permanent magnets is consistent with that of the coil groups; the magnet disc is made of a magnetic attraction material; one end of the connecting shaft is fastened on an axle box front cover of the railway wagon, and the connecting shaft is inserted into the hollow shaft and is fastened and connected with the hollow shaft. The bearing has the advantages of simple structure, simplicity and convenience in installation, bearing magnetization prevention and the like.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of railway freight cars, and in particular to an axle end power generation device for railway freight cars. Background Art

[0002] At present, railway vehicles have gradually begun to realize digital and intelligent health management, and have formed a series of standardized products and technologies. However, since railway freight cars have no power supply, these technologies are not easy to implement on freight cars. Therefore, if railway freight cars want to continue to develop in the direction of digitalization, intelligence and automation in the future, realize railway freight car status monitoring and health management, further improve transportation efficiency and reduce operating costs, it is necessary to first solve the problem of power supply for railway freight cars.

[0003] From the perspective of principle, wind turbines, diesel generators, battery power supply systems, solar power generation systems, and vibration power generation installed on vehicles can all provide power to railway freight cars. Since railway freight cars run on the line for a long time, a stable power supply is required during the operation process. The above power supply schemes are not convenient for vehicle operation: diesel generators and battery power supply systems need to be regularly refueled or charged to provide continuous power supply energy, and the vehicle operation process cannot provide stable energy in time; wind turbines need to be equipped with devices to collect wind energy. Once the wind energy collection device is blocked during operation, it will not be able to provide stable power supply, and the subsequent maintenance workload will be large, which is not conducive to vehicle operation; the solar power generation system is affected by sunlight and cannot continuously provide stable power supply; vibration power generation cannot provide a large discharge power. These power generation methods cannot meet the power demand of railway freight cars.

[0004] At present, the industry has proposed a power generation concept that converts the kinetic energy of a vehicle when it is running into electrical energy. That is, a generator is connected to the end face of the axle. When the vehicle is running, the axle drives the generator to generate electricity. This generator is called an axle-end generator.

[0005] In response to the needs of the axle-end power generation device, a generator and installation method suitable for installation on the bogie of a railway freight car are constructed. The core issues it mainly solves include:

[0006] 1. Requirements for bogie installation without welding or drilling

[0007] Railway freight car bogies are mature equipment. The operation management department has strict modification management regulations for bogies, requiring that no welding or drilling should be done on the bogie when installing the axle-end generator, and that the existing interfaces remain unchanged.

[0008] Railway freight car bogie axle end structure Fig.10As shown, the shaft end structure is mainly composed of a connecting shaft fixing bolt group 104, a locking gasket 105, a locking wire 106, a signboard 110, a load-bearing saddle 114, an axle box bearing 115, and an axle box front cover 116; the axle box bearing 115 is connected to the axle inside, and the upper part of the bearing is in a lap connection relationship with the load-bearing saddle 114. The load of the vehicle body is transmitted to the axle box bearing 115 and the axle through the load-bearing saddle 114. The axle box front cover 116 is installed on the outer side of the axle box of the axle box bearing 115. The axle box front cover 116 is connected to the axle through the connecting shaft fixing bolt group 104, and the axle box front cover 116 is prevented from loosening by the locking gasket 105 and the locking wire 106. At the same time, a signboard 110 recording important maintenance information of the bogie is installed at the bottom of the locking gasket 105. The above requirement to keep the existing interface unchanged is to meet the above key structures unchanged, and no welding or drilling requirements are added when the generator is installed.

[0009] 2. Generator does not have magnetization requirements for axle box bearings

[0010] The generator generates electromotive force by cutting magnetic lines of force through the relative movement of coils. Magnetic materials are key and indispensable components of the generator. When the generator is installed at the end of the shaft, close to the axle box bearing 115, the magnetic material may magnetize the bearing, causing bearing damage. The generator must be installed at the end of the shaft to prevent this phenomenon from happening.

[0011] 3. The generator is a complete set of overall installation equipment

[0012] According to the technical standards for generators, generators need to undergo a series of bench tests before leaving the factory, including power generation performance test, insulation withstand voltage test, and shell air tightness test. Based on this basic technical requirement, the generator needs to be assembled into a complete set of equipment before leaving the factory, and a series of tests must be completed before leaving the factory; after the generator leaves the factory, the complete set of equipment must be installed on site.

[0013] 4. Meet other operational requirements

[0014] Since the generator is installed on the bogie of a railway freight car, the entire car often needs to be cleaned during operation. The most common cleaning method is high-pressure water washing, so the generator casing is IP65 waterproof and meets the requirements of high-pressure water gun washing. At the same time, the whole or part of the generator should be prevented from falling off. Signboard 110 records important maintenance information and needs to be installed at the shaft end at any time in a position that is easy to observe and record.

[0015] The side of the bogie is close to the edge of the vehicle limit, and the generator needs to reduce the lateral size as much as possible to avoid the risk of limit violation after the generator is installed. The generator should be maintenance-free or have the same maintenance cycle as the vehicle.

[0016] The axial clearance of the railway freight car bogie bearing is Fig.10 As shown, the bearing saddle 114 has a large axial relative movement relative to the axle box front cover 116. The generator installation needs to fully consider this movement to avoid hindering its relative movement. Utility Model Content

[0017] The technical problem to be solved by the utility model is: in view of the technical problems existing in the prior art, the utility model provides a railway freight car axle end power generation device which has a simple structure, can be installed without welding or drilling modifications to the bogie, and avoids magnetization of the bearing.

[0018] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0019] A railway freight car shaft end power generation device comprises a generator assembly and a connecting shaft, wherein the generator assembly comprises a rear cover assembly, a rotor assembly and a front cover assembly;

[0020] The rear cover assembly is sealed and fastened to the front cover assembly to form an internal cavity, and the rotor assembly is located in the cavity;

[0021] A coil group is fixed on the inner side of the front cover assembly, the coil group includes a plurality of coils, and adjacent coils have opposite rotation directions and are connected to each other;

[0022] The rotor assembly includes a hollow shaft, a magnet disk and a plurality of permanent magnets; the two ends of the hollow shaft are respectively connected to the rear cover assembly and the front cover assembly in a sealed and rotatable manner; the magnet disk is fastened to the middle section of the hollow shaft to form a rotor body, a plurality of permanent magnets are distributed on the magnet disk and face one side of the front cover assembly, and the magnetic poles of adjacent permanent magnets are in opposite directions; the number of permanent magnets is the same as that of the coil group; the magnet disk is made of a magnetic absorbing material;

[0023] One end of the connecting shaft is fastened to the front cover of the axle box of the railway freight car, and the connecting shaft is inserted into the hollow shaft and is fastened to the hollow shaft.

[0024] As a further improvement of the above technical solution:

[0025] Each of the permanent magnets is distributed on the magnet disk in a circle with the axis of the magnet disk as the center of the circle, and is fixed on the magnet disk by a non-metallic fastener group.

[0026] The magnet disk is press-fitted into the middle section of the hollow shaft by interference fit; the hollow shaft and the rear cover assembly are sealed by a first oil seal.

[0027] An inspection plug is arranged at the bottom of the rear cover assembly.

[0028] The front cover assembly includes a front cover, a second oil seal, a second self-sealing bearing, a second bearing sleeve, a motor wire and a tightening piece; the outer ring and the inner ring of the second oil seal are respectively fitted with the inner wall of the center hole of the front cover and the outer diameter of the hollow shaft; the second self-sealing bearing is installed on the bearing seat of the center hole of the front cover through the second bearing sleeve; the wiring of the coil group is connected to the terminal assembly, and the coil is connected to the outside through the motor wire and the tightening piece.

[0029] A water retaining cover plate is arranged at the center of the outer side of the front cover.

[0030] Both sides of the generator assembly are connected to the axle box of the railway freight car through ear plates.

[0031] The rear cover assembly is provided with an anti-dropping hook, and the anti-dropping hook is connected to the body of the railway freight car through a steel wire rope.

[0032] The connecting shaft is a coaxial combination of a disc and a shaft; three bolt holes are evenly distributed on the disc, and the radius of the circle where the bolt holes are located is the same as the radius of the circle where the bolt holes are reserved on the front cover of the axle box; a concave structure is reserved on the outer side of the disc, and the bottom surface of the concave structure fits with the bolt installation surface of the front cover of the axle box during installation; the bolt hole is used to fix the connecting shaft and the front cover, and the side of the concave structure reserves a matching conical surface that matches the conical surface on the side of the front cover of the axle box, and this surface determines the center line of the connecting shaft; the shaft is a two-section structure, with three-petal reinforcement ribs at the root, the reinforcement ribs are evenly distributed at 120°, and are offset by 60° with the bolt holes; the shaft diameter matches the hollow inner diameter of the hollow shaft.

[0033] An eccentric screw hole is arranged at the top end of the connecting shaft; the connecting shaft and the hollow shaft are fastened together by an eccentric screw group threadedly connected to the screw hole.

[0034] Compared with the prior art, the advantages of the utility model are:

[0035] The utility model is installed on the axle box through a connecting shaft, and there is no need to weld or drill holes on the bogie during installation; a magnet disk made of magnetic absorption material is used to isolate the permanent magnet from the axial bearing to prevent the permanent magnet from magnetizing the bearing; the whole is a sealed complete set of equipment, which meets the requirements of the complete set of equipment to complete bench tests in the factory, is easier to ensure product quality, and has low difficulty in on-site installation; the power generation method of axial cutting magnetic lines is adopted, and the axial size of the generator of this structure is small, which is suitable for the side of the bogie close to the vehicle limit edge, and the generator needs to reduce the size in the lateral direction as much as possible, so as to avoid the risk of intrusion after the generator is installed; the integral coil group is composed of a circuit board, a coil hub, a coil, and a transmission cable to form an integral component, and each coil rotates in opposite directions and is connected end to end, with high voltage, simple structure and convenient installation. The utility model aims at the power supply problem of railway freight cars, and can be installed without welding or drilling holes on the bogie, which solves the power supply problem of railway freight cars and provides basic conditions for health management and status detection of railway freight cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is an exploded structural diagram of the shaft end power generation device in an embodiment of the utility model.

[0037] Figure 2 It is a schematic structural diagram of the shaft end power generation device of the utility model in an embodiment; wherein (a) is a side view; and (b) is a cross-sectional view.

[0038] Figure 3 It is a schematic structural diagram of a rear cover assembly of the utility model in an embodiment.

[0039] Figure 4 It is a schematic structural diagram of the rotor assembly of the utility model in an embodiment; wherein (a) is the main view; and (b) is the AA view of (a).

[0040] Figure 5 It is a structural schematic diagram of the front cover assembly of the utility model in an embodiment.

[0041] Figure 6 This is an installation structure diagram of the shaft end power generation device of the utility model in a specific application.

[0042] Figure 7 The present invention is a schematic structural diagram of the shaft end power generation device in a specific application; (a) is a main view; (b) is a sectional view.

[0043] Figure 8 Schematic diagram of the structure of the connecting shaft of the utility model in an embodiment; (a) is a stereoscopic diagram; (b) is a main view; (c) is the AA view of (b).

[0044] Fig. 9 Schematic diagram of the structure of the coil assembly of the utility model in an embodiment; (a) is the main view; (b) is the AA view of (a); (c) is the enlarged view of point I of (b).

[0045] Fig.10 Schematic diagram of the installation structure of the bogie axial cover plate in the utility model; (a) is the overall view; (b) is the enlarged view of point I of (a).

[0046] Fig.11 It is a schematic diagram of the structure of the connecting shaft of the utility model during specific installation.

[0047] Legend: S101, generator assembly; S102, fastener group; S103, connecting shaft; S104, connecting shaft fixing bolt group; S105, anti-loosening gasket; S106, anti-loosening wire; S107, right ear plate and fastener group; S108, eccentric screw group; A100, rear cover assembly; A101, rear cover; A102, anti-drop hanger; A103, anti-drop fastener group; A104, first oil seal; A105, first self-sealing bearing; A106, first bearing sleeve; A107, inspection plug; B100, rotor assembly; B101, hollow shaft; B102, magnet disk; B103, permanent magnet; B104, non-metallic fastener Parts group; C100, front cover assembly; C101, front cover; C102, second oil seal; C103, second self-sealing bearing; C104, second bearing sleeve; C105, coil group; C106, coil fixing screw group; C107, motor wire and tightening parts; C108, sealing cover plate; C109, anti-loosening fastener group; C110, terminal assembly; C111, motor nameplate; C112, nameplate fixing screw group; D100, housing screw group; 104, connecting shaft fixing bolt group; 105, anti-loosening gasket; 106, anti-loosening wire; 110, signboard; 114, load-bearing saddle; 115, axle box bearing; 116, axle box front cover. DETAILED DESCRIPTION

[0048] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] like Figure 1 As shown, the railway freight car axle-end power generation device of the embodiment of the utility model includes a generator assembly S101 and a connecting shaft S103; the generator assembly S101 includes a rear cover assembly A100, a rotor assembly B100, a front cover assembly C100 and a housing screw group D100, the rear cover assembly A100 and the front cover assembly C100 are fixed by the housing screw group D100 screws, and an internal cavity is formed; the rotor assembly B100 is located in the internal cavity between the rear cover assembly A100 and the front cover assembly C100.

[0050] like Figure 3As shown, the rear cover assembly A100 mainly includes a rear cover A101, an anti-drop hanger A102, an anti-drop fastener assembly A103, a first oil seal A104, a first self-sealing bearing A105, a first bearing sleeve A106 and an inspection plug A107. The rear cover A101 is made of alloy material and is the main component of the assembly. It undertakes functions such as structural force and sealing. The anti-drop hanger A102 and the anti-drop fastener group A103 are structural parts installed on the rear cover A101, which are used to prevent the generator assembly S101 from falling off the bogie when it fails. The first oil seal A104 is the sealing component of the center hole of the rear cover A101. The outer ring and inner ring of the first oil seal A104 are respectively fitted with the inner wall of the center hole of the rear cover A101 and the outer diameter of the hollow shaft B101 to prevent dust and water from entering the internal cavity of the generator assembly S101. The first self-sealing bearing A105 is installed on the bearing seat of the center hole of the rear cover A101 through the first bearing sleeve A106. An inspection plug A107 is set at the bottom of the rear cover A101, which is a window for daily inspection of the inside of the rear cover A101.

[0051] like Figure 4 As shown, the rotor assembly B100 includes a hollow shaft B101, a magnet disk B102, a permanent magnet B103 and a non-metallic fastener group B104. The hollow shaft B101 is a shaft with a hollow interior and a partition, and a magnet disk B102 is installed in the middle through interference fit to form the main body of the rotor; the surface of the magnet disk B102 close to the front cover assembly C100 is inlaid with 8 permanent magnets B103 distributed in a circle with the axis as the center, and the magnetic pole direction of the permanent magnet B103 is the same as the axial direction, and the magnetic pole directions of adjacent permanent magnets B103 are opposite; the magnet disk B102 is made of magnetic absorption material (such as iron, steel material), and the permanent magnet B103 and the magnet disk B102 have mutual attraction, and at the same time, the permanent magnet B102 is prevented from falling off during the operation of the generator. At the same time, in order to avoid affecting the magnetic circuit of the permanent magnet B102, a non-metallic fastener group B104 is set to fix the magnet disk B102 and the permanent magnet B103.

[0052] like Figure 5As shown, the front cover assembly C100 mainly includes a front cover C101, a second oil seal C102, a second self-sealing bearing C103, a second bearing sleeve C104, a coil group C105, a coil fixing screw group C106, a motor wire and a fastener C107, a sealing cover plate C108, an anti-loosening fastener group C109, a terminal assembly C110, a motor nameplate C111 and a nameplate fixing screw group C112. The front cover C101 is made of alloy material and is the main part of the assembly. It undertakes structural stress and sealing functions. The second oil seal C102 is the sealing part of the center hole of the front cover C101. The outer ring and inner ring of the second oil seal C102 are respectively fitted with the inner wall of the center hole of the front cover C101 and the outer diameter of the hollow shaft B101 to prevent dust and water from entering the cavity. The second self-sealing bearing C103 is installed on the bearing seat of the center hole of the front cover C101 through the second bearing sleeve C104. The coil group C105 is a circular ring structure, and one side of the ring is A coil group with 8 adjacent coils with opposite rotation directions and adjacent wires of coils 1 to 8 connected is fixed. Coils 1 and 8 are connected end to end to the terminal assembly C110, and the coils are connected to the outside of the generator through the motor wire and the screwing piece C107. The motor supplies power to the outside when generating electricity. The sealing cover plate C108 and the anti-loosening fastener group C109 are used to maintain the motor wiring and ensure the waterproof performance of the junction box. The motor nameplate C111 and the nameplate fixing screw group C112 are permanently installed on the shell to record the basic information of the generator. In other embodiments, the number of permanent magnets and coils can be changed to other numbers, such as other even numbers; or the interconnection relationship of the coils can be changed, such as the coils are connected in parallel or in series, or in parallel combination connection mode; by adjusting the area and shape of the permanent magnets and the number and shape of the coils, power that meets different power and voltage levels can be generated.

[0053] Working principle: Figure 2As shown, the joint surface of the rear cover assembly A100 and the front cover assembly C100 is sealed with glue, and the hollow shaft B101 is sealed with the front cover C101 and the rear cover A101 through an oil seal and a self-sealing bearing. The double covers form a completely sealed cavity inside, and other positions are also sealed by the inspection plug A107 with a sealing ring and the sealing cover plate C108, which effectively ensures the waterproof performance inside the cavity. The 8 coil groups with opposite rotation directions and adjacent wires of coils 1 to 8 are fixed on the coil group C105. The coils 1 and 8 are connected to the terminal assembly C110 end to end, and the coils are connected to the outside of the generator through the motor wire and the tightening piece C107. The motor supplies power to the outside when generating electricity; the surface of the magnet disk B102 is inlaid with 8 permanent magnets B103 distributed in a circle with the axis as the center. The magnetic pole direction of the permanent magnet B103 is the same as the axial direction, and the magnetic pole directions of adjacent permanent magnets B103 are opposite. When the hollow shaft B101 rotates, the coil moves relative to the permanent magnet B103, cutting the magnetic lines of force of the permanent magnet B103 at the corresponding axial position, forming an electromotive force at the first position of each coil; since the adjacent coils have opposite rotation directions and the adjacent permanent magnets B103 have opposite magnetic poles, the electromotive forces of each coil are in the same direction, and the electromotive forces are superimposed when the coils are connected at the ends, which can provide a larger electromotive force outward.

[0054] After the motor is installed, the magnet disk B102 made of magnetic material isolates the permanent magnet B103 and the axle box bearing 115, and the strong magnet cannot penetrate the magnet disk B102 to magnetize the axle box bearing 115; at the same time, the magnetic lines of the permanent magnet B103 are staggered with the respective sealed bearing spaces (such as Figure 2 As shown in (b), the magnetic lines of force of the permanent magnet B103 and the bearing A105 are staggered in the axial space, which also avoids the respective sealed bearings from being magnetized.

[0055] Generator installation principle: The generator adopts a hollow shaft B101 structure, and the generator rotor is fixed by the hollow shaft B101. Figure 6As shown, on the front cover 116 of the bogie axle box, a connecting shaft S103 is installed and fixed on the front cover by using the connecting shaft fixing bolt group S104 in the existing three screw holes, and an anti-loosening gasket S105 and an anti-loosening wire S106 are used as anti-loosening components; the generator assembly S101 is connected to the connecting shaft S103 through a hollow shaft, and the connecting shaft S103 and the generator are fixed and prevented from falling off by an eccentric screw group S108; when the vehicle is running, the front cover 116 fixed on the axle drives the connecting shaft The connecting shaft S103 rotates and drives the hollow shaft B101 to rotate and generate electricity. In order to prevent the generator housing from rotating with the hollow shaft B101, structures for installing the left ear plate and fastener group S102 and the right ear plate and fastener group S107 are respectively provided on both sides of the generator housing. After the ear plate is installed, it is located on the lower surface of the bearing saddle 114. The ear plates on both sides are used to provide counter-torque for rotation in different directions. When the vehicle runs in different directions, it can be ensured that the generator housing does not rotate with the hollow shaft B101.

[0056] The front cover assembly C100 of the generator is on the outside of the vehicle. During the cleaning operation, high-pressure water will flush the outside of the generator. When the high-pressure water enters the gap between the hollow shaft B101 and the front cover C101, there may be a risk of water entering the generator cavity. In order to avoid this risk, a water retaining cover S109 is set at the center of the outer side of the front cover C101. At the same time, a signboard S110 is set on the outside of the water retaining cover S109 to record the details of daily maintenance, and it is fixed to the front cover C101 by the cover fastener group S111.

[0057] Principle of anti-falling off the whole generator: After the above generator is installed, in order to prevent the whole generator from falling off, an anti-falling rope is used. Figure 7 As shown, a wire rope fixing seat S112 is installed on the lower surface of the vehicle body near the top of the generator, and a set of fixed-length wire ropes S113 are determined and manufactured according to the vehicle's curve passing ability, and the wire ropes S113 are respectively fixed to the wire rope fixing seat S112 and the anti-drop hanger A102; when the vehicle runs normally through the curve line, the length of the wire rope S113 can ensure that the vehicle can pass the curve, and when the generator falls off as a whole, the wire rope S113 can protect the generator from falling onto the track and causing a driving safety accident.

[0058] Connecting shaft structure principle: The connecting shaft S103 structure is as follows Figure 8As shown, its main structure is a coaxial combination of a disc and a shaft. Three bolt holes are evenly distributed along the center of the disc structure, and the radius of the circle where the bolt holes are located is the same as the radius of the circle where the bolt holes are reserved for the front cover 116 of the axle box; a concave structure is reserved on the outside of the disc, and the bottom surface of the concave structure fits with the bolt installation surface of the front cover 116 of the axle box during installation. The bolt hole is used to fix the connecting shaft and the front cover, and the concave side surface is reserved to match the conical surface of the side of the front cover 116 of the axle box, and the center line of the connecting shaft S103 is determined by this surface. The shaft structure has three structural features: the shaft is a two-stage structure, with three-petal reinforcement ribs at the root, the reinforcement ribs are evenly distributed at 120°, and are staggered with the bolt holes at 60°; the top is a round shaft, and the shaft diameter matches the hollow inner diameter of the hollow shaft B101; an eccentric screw hole is set at the top of the shaft, and when the shaft is inserted into the hollow shaft, only one eccentric screw is needed to achieve the dual functions of fixing and transmitting torque.

[0059] Coil group structure principle: Coil group C105 structure is as follows Fig. 9 As shown, it includes a circuit board C105.1, a coil hub C105.2, a coil C105.3, and a transmission cable C105.4. The circuit board C105.1 is a circular ring structure, and 8 coil hubs C105.2 are evenly distributed along the center of the circular ring and fixed together with the circuit board, and a coil is wound on each coil hub; the rotation directions of coils No. 1 to No. 8 are arranged staggered with each other, and a "C-type" printed circuit is printed between coils No. 1 to No. 8 on the circuit board C105.1, and the "semi-C-type" printed circuit between coils No. 1 and No. 8 is not connected in the middle; the end of each coil is welded to the "C-type" printed circuit on both sides of the coil, forming a structure in which 8 coils are connected end to end; the transmission cable C105.4 is a 2-core cable, and the 2-core cable is welded to the "semi-C-type" printed circuit of coils No. 1 and No. 8 respectively. When an electromotive force is generated in the coil, the 2-core cable is the positive and negative poles of the power supply.

[0060] Screw holes are set between the coils, and the coil group C105 is fixed to the front cover C101 structure by screws; a plurality of through holes are set in the center of the coil hub C105.2, among which the circular hole coaxial with the coil hub C105.2 is used to fix the coil, that is, when the coil group c105 is fixed on the front cover C101, the protrusion reserved on the front cover C101 is inserted into the circular hole to prevent the coil from shaking, and the other circular holes are used for fixing the gap between the coil group and the front cover by injecting glue after the coil group is installed.

[0061] Generator assembly: All parts processing and generator assembly S101 are completed in the factory. The rear cover assembly A100 has the following structure: Figure 3As shown in the assembly, the first bearing sleeve A106 and the rear cover A101 are interference fit. During assembly, the first bearing sleeve A106 is first frozen at low temperature, and then lubricated with lubricating oil and press-fitted into the bearing seat on the rear cover A101. Then, the first self-sealing bearing A105 is frozen at low temperature and press-fitted into the first bearing sleeve A106 in the same way.

[0062] The structure of rotor assembly B100 is as follows Figure 4 Assembled as shown, the hollow shaft B101 and the magnet disk B102 are connected by interference fit or fillet weld at the shaft shoulder position, so that torque can be transmitted between them. When interference fit is adopted, assembly is performed by low temperature freezing. When installing the permanent magnet B103, ensure that the magnetic poles of adjacent permanent magnets B103 are in opposite directions, and fix them to the magnet disk B102 with a non-metallic fastener group B104.

[0063] The structure of the front cover assembly C100 is as follows Figure 5 Assemble as shown, wherein the second self-sealing bearing C103, the second bearing sleeve C104 and the front cover C101 are assembled by low temperature freezing. When installing the coil group C105, the reserved position of the transmission cable C105.4 is close to the motor junction box, and then the transmission cable C105.4 is pre-laid from the inside of the shell into the motor junction box, and then the coil group C105 is fixed to the front cover C101 through the coil fixing screw group C106. When fixing, ensure that the protrusion on the inside of the shell is embedded in the groove in the center of the coil hub C105.2 to prevent the coil from shaking. Finally, the gap between the coil group and the front cover is fixed by injecting glue through other round holes on the hub. Other components are fixed with bolt fasteners. After the fasteners are fixed, the anti-loosening gasket of the fasteners is mechanically destroyed to make it have an anti-loosening function.

[0064] Before closing the double covers, apply sealant on the flange surface of the rear cover assembly A100, insert the low-temperature frozen rotor assembly B100 into the rear cover bearing, and finally close the front cover assembly C100 and tighten the housing screw group D100. After closing the double covers, the rotor assembly B100 should rotate flexibly and the bearing clearance should be appropriate.

[0065] Finally, a series of bench tests were carried out on the generator assembly S101.

[0066] Generator installation:

[0067] Before installing the generator, the existing parts of the bogie need to be removed, such as Fig.10As shown in the figure, the original structure of the bogie axle end mainly consists of a connecting shaft fixing bolt group 104, a locking gasket 105, a locking wire 106, a sign 110, a load-bearing saddle 114, an axle box bearing 115, and an axle box front cover 116. The connecting shaft fixing bolt group 104, the locking gasket 105, the locking wire 106, and the sign 110 are the accessories that need to be replaced and should be removed; then the connecting shaft S103, the connecting shaft fixing bolt group S104, the locking gasket S105, the locking wire S106 are installed according to the Fig.11 Assemble and secure on the shaft end as shown.

[0068] like Figure 6 As shown, when installing the generator assembly S101, first insert the generator assembly into the outside of the connecting shaft S103, and ensure that the eccentric screw hole of the hollow shaft B101 corresponds to the screw hole of the connecting shaft S103, and then use the eccentric screw group S108 to fix the two shafts. Then, transcribe the maintenance information on the signboard 110 to the signboard S110 by engraving or laser marking, and finally tighten the cover fastener group S111 to install the water retaining cover S109 and the signboard S110 on the front cover C101 in the order shown in the figure.

[0069] The left ear plate and fastener group S102 and the right ear plate and fastener group S107 can be installed on the housing after or before the generator assembly is installed, and the anti-loosening gasket is destroyed to have an anti-loosening effect. After the ear plate is installed, regardless of whether the axle has axial relative movement, the ear plate does not hinder its movement and can effectively prevent the motor housing from rotating with the hollow shaft.

[0070] After all the generator parts are installed, Figure 7 As shown, a wire rope fixing seat S112 is welded and installed on the lower surface of the car body near the generator, and a set of fixed-length wire ropes S113 are determined and manufactured according to the vehicle's curve passing ability, and the wire ropes are fixed to the wire rope fixing seat S112 and the anti-dropping hanger A102 respectively; when the vehicle passes through the curve line normally, the length of the wire rope S113 can ensure that the vehicle passes through the curve, and when the generator falls off as a whole, the wire rope S113 can protect the generator from falling off the track and causing a driving safety accident; then, the motor power line is arranged along the designed path to the rear-end power processing equipment, and the power generated by the generator can be processed to supply power to the on-board equipment. Each railway freight car selects one axle end to install a generator to meet the power demand of the vehicle.

[0071] Generator use: The generator is a fully sealed structure that can meet the needs of high-pressure water washing during train operation; the bearings used are self-sealing and self-lubricating bearings, which can be maintenance-free for a long time. The generator can be inspected and maintained in accordance with the vehicle maintenance cycle. Inspection plug A107 can be used for daily inspection of water intrusion and foreign matter inside the generator.

[0072] The utility model is installed on the axle box through a connecting shaft S103, and there is no need to weld or drill holes on the bogie during installation; a magnet disk B102 made of magnetic absorbing material is used to isolate the permanent magnet B103 from the axial bearing to prevent the permanent magnet B103 from magnetizing the bearing; the whole is a sealed complete set of equipment, which meets the requirement that the complete set of equipment must complete bench tests in the factory, makes it easier to ensure product quality, and reduces the difficulty of on-site installation; a power generation method of axially cutting magnetic lines of force is adopted, and the axial size of the generator of this structure is small, which is suitable for the side of the bogie close to the vehicle limit edge, and the generator needs to reduce the size in the lateral direction as much as possible to avoid the risk of intrusion after the generator is installed; the integrated coil group is composed of a circuit board C105.1, a coil hub C105.2, a coil C105.3, and a transmission cable C105.4 to form an integral component, and the coils have opposite rotation directions and are connected end to end, with high voltage, simple structure, and easy installation.

[0073] The utility model aims at the problem of power supply for railway freight cars. It can be installed without welding or drilling modifications on the bogies, thus solving the problem of power supply for railway freight cars and providing basic conditions for health management and status detection of railway freight cars.

[0074] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A railway freight car axle end power generation device, characterized in that: It comprises a generator assembly (S101) and a connecting shaft (S103), wherein the generator assembly (S101) comprises a rear cover assembly (A100), a rotor assembly (B100) and a front cover assembly (C100); The rear cover assembly (A100) and the front cover assembly (C100) are sealed and fastened to form an internal cavity, and the rotor assembly (B100) is located in the cavity; A coil group (C105) is fixed on the inner side of the front cover assembly (C100), and the coil group (C105) includes a plurality of coils, and adjacent coils have opposite rotation directions and are connected to each other; The rotor assembly (B100) comprises a hollow shaft (B101), a magnet disk (B102) and a plurality of permanent magnets (B103); the two ends of the hollow shaft (B101) are respectively connected to the rear cover assembly (A100) and the front cover assembly (C100) in a sealed and rotatable manner; the magnet disk (B102) is fastened to the middle section of the hollow shaft (B101) to form a rotor body; the plurality of permanent magnets (B103) are distributed on the magnet disk (B102) and face one side of the front cover assembly (C100), and the magnetic poles of adjacent permanent magnets (B103) are in opposite directions; the number of permanent magnets (B103) is the same as that of the coil group (C105); the magnet disk (B102) is a magnet disk made of magnetic absorbing material; One end of the connecting shaft (S103) is fastened to the front cover of the axle box of the railway freight car, and the connecting shaft (S103) is inserted into the hollow shaft (B101) and is fastened to the hollow shaft (B101).

2. The railway freight car axle end power generation device according to claim 1, characterized in that: Each of the permanent magnets (B103) is distributed on the magnet disk (B102) in a circle with the axis of the magnet disk (B102) as the center of the circle, and is fixed on the magnet disk (B102) by a non-metallic fastener group (B104).

3. The railway freight car axle end power generation device according to claim 2, characterized in that: The magnet disk (B102) is press-fitted into the middle section of the hollow shaft (B101) by interference fit; the hollow shaft (B101) and the rear cover assembly (A100) are sealed by a first oil seal (A104).

4. The railway freight car axle end power generation device according to claim 1, 2 or 3, characterized in that: An inspection plug (A107) is provided at the bottom of the rear cover assembly (A100).

5. The railway freight car axle end power generation device according to claim 1, 2 or 3, characterized in that: The front cover assembly (C100) comprises a front cover (C101), a second oil seal (C102), a second self-sealing bearing (C103), a second bearing sleeve (C104) and a motor wire and a tightening piece (C107); the outer ring and the inner ring of the second oil seal (C102) are respectively fitted with the inner wall of the center hole of the front cover (C101) and the outer diameter of the hollow shaft (B101); the second self-sealing bearing (C103) is installed on the bearing seat of the center hole of the front cover (C101) through the second bearing sleeve (C104); the wiring of the coil group (C105) is connected to the terminal assembly (C110), and the coil is connected to the outside through the motor wire and the tightening piece (C107).

6. The railway freight car axle end power generation device according to claim 5, characterized in that: A water retaining cover plate (S109) is provided at the outer center of the front cover (C101).

7. The railway freight car axle end power generation device according to claim 1, 2 or 3, characterized in that: Both sides of the generator assembly (S101) are connected to the axle box of the railway freight car through ear plates.

8. The railway freight car axle end power generation device according to claim 1, 2 or 3, characterized in that: The rear cover assembly (A100) is provided with an anti-slip hanger (A102), and the anti-slip hanger (A102) is connected to the body of the railway freight car through a steel wire rope.

9. The railway freight car axle end power generation device according to claim 1, 2 or 3, characterized in that: The connecting shaft (S103) is a coaxial combination of a disc and a shaft; three bolt holes are evenly distributed on the disc, and the radius of the circle where the bolt holes are located is the same as the radius of the circle where the bolt holes are reserved on the front cover (116) of the axle box; a concave structure is reserved on the outer side of the disc, and when installed, the bottom surface of the concave structure fits with the bolt installation surface of the front cover (116) of the axle box; the bolt hole is used to fix the connecting shaft and the front cover, and the side of the concave structure reserves a matching conical surface that matches the conical surface on the side of the front cover (116) of the axle box, and the center line of the connecting shaft is determined by this surface; the shaft is a two-section structure, and there are three-petal reinforcement ribs at the root, the reinforcement ribs are evenly distributed at 120°, and are offset by 60° with the bolt holes; the shaft diameter matches the hollow inner diameter of the hollow shaft (B101).

10. The railway freight car axle end power generation device according to claim 9, characterized in that: An eccentric screw hole is arranged at the top end of the connecting shaft (S103); the connecting shaft (S103) and the hollow shaft (B101) are fastened together via an eccentric screw assembly (S108) threadedly connected to the screw hole.

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