Railway wagon axle end generator arrangement

Abstract

The application discloses a railway wagon axle end generator device, which comprises a damping protective cover, a stator, a rotor and a damping coupling, wherein the stator comprises a coupling plug, a fixed shaft, a stator core and a stator coil; the damping protective cover comprises a cover body and a damping spring assembly, the damping spring assembly comprises damping springs and connecting pieces, and the damping springs are used for damping between a wagon body and the cover body; the rotor comprises a rotor casing, an annular magnet and a rotor end cover, and the annular magnet is installed on the inner wall of the rotor casing; the damping coupling comprises a damping rubber stack and a mounting shell used for being connected with a wagon axle of a railway wagon, the damping rubber stack is installed in the mounting shell and is used for damping the mounting shell, and the mounting shell is fixedly connected with the rotor end cover. The damping protective cover and the damping coupling are connected with the stator and the rotor respectively, damping of the stator and the rotor can be realized when the railway wagon runs, and the rotor and the stator can stably output electric energy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of railway freight car on-board generator, more particularly, relates to a railway freight car axle end generator device. BACKGROUND

[0002] In recent years, with the rapid development of China's economy, railway transportation is developing towards high speed and heavy load.

[0003] Railway freight car line also faces great pressure and challenge as well as great development opportunity, with the development of railway freight car technology, in order to greatly improve the economy, reliability and safety of railway freight car operation, the railway freight car is equipped with electric control system, fault intelligent detection device, axle temperature detection device and electronic anti-skid device, which has become the development direction of future railway freight car.

[0004] When the railway vehicle is running, the vehicle will vibrate due to various reasons. This vibration form is a multi-degree-of-freedom vibration system, and the excitation force acting on this system is various, so the vibration of the railway vehicle is an extremely complex vibration process. Generally speaking, the excitation force causing the vibration of the vehicle can be divided into two types: line reasons and wheelset reasons. Most of these excitations are intensified with the increase of vehicle speed, so the vibration problem is more prominent on high-speed vehicles. The line reasons are mainly due to rail joints, vertical deformation of the rail and irregularity of the track, etc. The wheelset reasons are mainly due to wheelset eccentricity and wheel shaft eccentricity caused by machining error, wheel imbalance, tread abrasion and tread slope, etc.

[0005] Due to these complex vibrations during the running of the railway freight car, the vibration will affect the normal rotation of the rotor relative to the stator of the generator and make the power generation unstable. At present, few generators are installed on the railway freight car for power supply system, and the power supply of the railway freight car becomes an urgent problem to be solved.

[0006] At present, railway workers at home and abroad have carried out a lot of research on railway freight car generators, such as CN202110736985.4 discloses a pneumatic power generation device, which mainly communicates with the vehicle air circuit through the input port on the bistable electromagnetic valve, controls the on-off of the air circuit on the bistable electromagnetic valve body through the one-way valve and two electromagnetic valves to supply air to the pneumatic motor, and the pressure air drives the pneumatic motor to rotate. The pneumatic motor drives the generator to rotate through the plum blossom coupling, so as to realize the conversion of kinetic energy into electric energy. Since the pneumatic motor needs to be supplied with air by the vehicle air circuit, if the vibration of the railway freight car is relatively large, the air supply flow will be turbulent, the work of the pneumatic motor will be unreliable, which will lead to large fluctuation of the generated electricity and unstable voltage.

[0007] CN201910541582.7 discloses a vibration kinetic energy recovery system based on railway freight cars, comprising a vibration power generation module for collecting vibration kinetic energy generated in multiple directions of the running railway freight car and converting the collected vibration kinetic energy into electric energy. This vibration-based power generation device, although many researchers at home and abroad are trying to study various freight car power generation devices, through theoretical calculation, mechanical simulation analysis, performance test research and other means to verify its reliability, but so far, because of the low power density, there are few examples of actual running of the power generation device. Therefore, how to improve the power density and reliability of the generator has become a technical problem to be solved.

[0008] CN202210180259.3 discloses a new type of axle end generator for railway freight cars for generating electricity for the railway freight cars, the railway freight cars have a non-bogie bogie and an axle, including a bearing saddle, a generator housing, a stator and a rotor; the transmission is realized by a complementary concave-convex groove type coupling structure between the first protruding part and the second protruding part, and the gap between the shaft end pressing plate and the rotating shaft along the axle, which can adapt to the radial and axial runout of the generator and the shaft end pressing plate, and can solve the problem that the runout between the bearing saddle and the axle causes the axle end generator to not run normally. When the railway freight car vibrates, the first protruding part and the second protruding part will produce a rigid collision, which will cause the rotor to produce a sudden stop and affect the normal rotation of the rotor, so that the generator generates unstable electricity. In addition, the stator is arranged around the rotor, which also limits the pole number of the stator and the rotor, so that the power density is not high. SUMMARY

[0009] In view of the above defects or improvement needs of the prior art, the present application provides a railway freight car axle end generator device which can improve the power density and reliability of the generator.

[0010] To achieve the above-mentioned purpose, according to one aspect of the present application, a railway freight car axle end generator device is provided, characterized in that it comprises a shock-absorbing protective cover, a stator, a rotor and a shock-absorbing coupling, wherein:

[0011] The stator comprises a coupling plug, a fixed shaft, a stator core and a stator coil, one end of the fixed shaft is provided with the coupling plug, and the other end is provided with the stator core, and the stator coil is installed on the stator core;

[0012] The shock-absorbing protective cover comprises a cover body and two groups of shock-absorbing spring assemblies, the cover body is fixedly connected with the fixed shaft, and the fixed shaft is located between the two groups of shock-absorbing spring assemblies;

[0013] For each of the damping spring assemblies, it comprises a connecting piece and a damping spring, the connecting piece is fixedly installed on the cover body, the damping spring is vertically installed on the connecting piece, one end of the damping spring abuts against the cover body and the other end is used for abutting against the vehicle body;

[0014] The rotor comprises a rotor shell, an annular magnet and a rotor end cover, the rotor shell is installed on the fixed shaft through a bearing, the annular magnet is installed on the inner wall of the rotor shell, the annular magnet is coaxially arranged with the fixed shaft, and the rotor end cover is fixedly installed on the rotor shell;

[0015] The damping coupling comprises a damping rubber stack and a mounting shell used for connecting with the axle of the railway wagon, the mounting shell is connected with the rotor end cover, the damping rubber stack is installed in the mounting shell, and the end face of the mounting shell is provided with a limiting table used for preventing the rotor end cover from falling off from the mounting shell, and the damping rubber stack presses the rotor end cover on the limiting table.

[0016] Preferably, the rotor end cover comprises an end cover body and a plurality of bosses circumferentially arranged on the end cover body, and the bosses all extend along the radial direction of the fixed shaft;

[0017] The inner wall of the mounting shell is provided with a plurality of clamping grooves used for clamping the bosses, one end of each clamping groove extends to the end face of the mounting shell so that the boss extends into the clamping groove, and the end of the mounting shell is formed with the limiting table at the position corresponding to each clamping groove, and each clamping groove extends in a spiral shape;

[0018] Each of the bosses extends into the clamping groove from one end of the clamping groove and rotates by a set angle in a set direction, so that the boss is rotated to one end of the clamping groove away from the end face of the mounting shell, and then the rotor end cover and the mounting shell are connected together;

[0019] The slot width of the clamping groove in the axial direction of the fixed shaft is greater than the length of the boss in the axial direction of the fixed shaft, so that the boss can reciprocate in the clamping groove in the axial direction of the fixed shaft, and damping of the damping rubber stack on the rotor end cover is facilitated.

[0020] Preferably, the difference between the slot width of the clamping groove in the axial direction of the fixed shaft and the length of the boss in the axial direction of the fixed shaft is 0.5-2 mm.

[0021] Preferably, the slot number of the stator core is 36, and the annular magnet is internally radially magnetized and has 40, 42 or 48 magnetic poles.

[0022] Preferably, the outer circle of the annular magnet is coated with glue and adhered to the inner wall of the rotor shell.

[0023] Preferably, the magnetic field of the railway wagon axle end generator device is a radial magnetic field.

[0024] Preferably, the rotor further comprises an oil seal, the outer circle surface of which is installed in the oil seal chamber of the inner wall of the rotor shell and the inner circle surface of which is installed on the fixed shaft.

[0025] Preferably, a locking nut is further comprised, one end of the fixed shaft is provided with external threads and a shoulder and this end passes through the cover body and connects the locking nut, the locking nut presses the cover body on the shoulder.

[0026] Preferably, the stator and the rotor are both located in the cover body.

[0027] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0028] 1) The damping spring assembly of the protective cover connected to the stator of the present application is connected with the fixed shaft of the stator, when the vehicle body vibrates, the damping spring can effectively isolate the vibration of the vehicle body, so that the vibration of the vehicle body can be absorbed by the damping spring, and the vibration of the vehicle body has little effect on the overall generator; in addition, the damping rubber stack is also installed on the damping coupling, which can effectively isolate the vibration of the axle and does not affect the normal rotation of the rotor.

[0029] 2) The present application adopts the mode that the annular magnet of the rotor surrounds the stator core, the annular magnet is outside and the stator core is inside, which can effectively increase the slot number of the stator and the pole number of the rotor, and further improve the power density and reliability of the generator at low speed. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the front view of the present application;

[0031] Figure 2 is the exploded view of the present application;

[0032] Figure 3 is the perspective view of the rotor end cover in the present application;

[0033] Figure 4 is the perspective view of the damping coupling in the present application;

[0034] Figure 5 is the partial magnetic circuit schematic diagram of the present application;

[0035] Figure 6 is the sectional view of the present application. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] With reference to Figures 1-6 A railway truck axle end generator device comprises a damping protective cover 2, a stator, a rotor and a damping coupling 4, wherein:

[0038] The stator comprises a coupling plug 301, a fixed shaft 302, a stator core 305 and a stator coil 304, one end of the fixed shaft 302 is provided with the coupling plug 301 and the other end is provided with the stator core 305, and the stator coil 304 is installed on the stator core 305.

[0039] The damping protective cover 2 comprises a cover body 21 and two sets of damping spring assemblies 22, and the cover body 21 is fixedly connected with the fixed shaft 302.

[0040] Each set of damping spring assemblies 22 comprises a connecting piece and a damping spring, the connecting piece is fixedly installed on the cover body 21, and the damping spring is vertically installed on the connecting piece, one end of the damping spring abuts against the cover body 21 and the other end is used to abut against a vehicle body, so as to realize damping between the vehicle body and the cover body 21. The connecting piece is preferably a bolt. The damping spring is preferably always in a compressed state.

[0041] The damping spring can limit the fixed shaft 302 due to contact with the vehicle body, so as to prevent continuous rotation of the fixed shaft 302 (or the stator), so that the stator can only deflect in a small range when the vehicle body vibrates. The two sets of damping spring assemblies 22 are arranged along the front and back of the vehicle body, and the fixed shaft 302 is arranged between the two sets of damping spring assemblies 22, so that the damping spring assemblies 22 can damp the stator in the front and back directions of the railway truck. In this way, whether the railway truck moves forward or backward, one damping spring can be compressed in contact with the vehicle body, so as to prevent the cover body from colliding with the vehicle body and damaging the bearing. If the elastic force of the damping spring is large enough, the stator can hardly deflect when the vehicle body vibrates.

[0042] The rotor comprises a rotor shell 312, an annular magnet 313 and a rotor end cover 314, the rotor shell 312 is mounted on the fixed shaft 302 through bearings, preferably two bearings are provided, which are a first bearing 303 and a second bearing 306. The annular magnet 313 is mounted on the inner wall of the rotor shell 312, and the outer circle of the annular magnet 313 is bonded to the inner wall of the rotor shell 312 by glue. The rotor end cover 314 is fixedly mounted on the rotor shell 312, and is preferably fixed by the locking bolts 315 provided on the side of the rotor end cover 314; the stator and the rotor are located in the cover body 21, and the cover body 21 can well protect the stator and the rotor. The present application generates alternating current and electric energy through the rotation of the rotor and the electromagnetic induction of the stator coil 304, and the electric energy generated by the generator device is transmitted out through the connecting plug 301 of the stator. When the rotor rotates, the damping spring assembly 22 of the protective cover 2 contacts the vehicle body to prevent continuous rotation of the stator, and only allows the fixed shaft 302 to deflect a small angle and the fixed shaft 302 can quickly return.

[0043] The rotor and the stator jointly form a power generation main body 3.

[0044] The damping shaft coupling 4 comprises a damping rubber stack 41 and a mounting shell 42 for connecting with the axle of the railway wagon, the mounting shell 42 connects the rotor end cover 314, the damping rubber stack 41 is mounted in the mounting shell 42, and the end face of the mounting shell 42 is provided with a limiting table 422 for preventing the rotor end cover 314 from falling off the mounting shell 42, the damping rubber stack 41 is always in a compressed state, and initially, the damping rubber stack 41 presses the rotor end cover 314 on the limiting table 422, so as to realize damping between the rotor end cover 314 and the mounting shell 42. Since the damping rubber stack 41 is made of rubber material and has elasticity, when the compression amount of the damping rubber stack 41 changes, the rotor end cover 314 can be allowed to have a certain displacement in the axial direction of the fixed shaft 302, so as to adapt to the axial vibration of the axle. After the rotor end cover 314 is mounted on the mounting shell 42, the two do not rotate relative to each other, and the rotor end cover 314 can move relative to the mounting shell 42 in the axial direction of the fixed shaft 302, so as to adapt to the change of the compression amount of the damping rubber stack 41 and the axial movement of the rotor end cover 314.

[0045] Since the mounting shell 42 is directly connected with the axle, when the axle rotates, the mounting shell 42 drives the rotor end cover 314 to rotate, and then the rotor as a whole rotates. If the damping rubber stack 41 is installed in the mounting shell 42, the damping rubber stack 41 can effectively absorb the vibration of the axle in the radial and axial directions. The damping rubber stack 41 itself is made of rubber material, so that after being installed on the mounting shell 42, it has a damping function along the radial direction of the fixed shaft. When the mounting shell 42 vibrates under the driving of the axle, the damping rubber stack 41 acts on the rotor end cover 314, which is a flexible impact on the rotor end cover 314. Therefore, the rotor as a whole can also be well damped, and the normal rotation of the rotor will not be affected. The damping rubber stack 41 preferably includes a disc-shaped structure and a Y-shaped structure, the main body of which is a disc-shaped structure, the side surface of the disc-shaped structure is arranged with a Y-shaped structure, and the Y-shaped structure is a central symmetric structure.

[0046] Due to the installation of the damping spring assembly 22 and the damping rubber stack 41, the vibration of the vehicle body and the axle will hardly affect the normal rotation of the rotor and the normal power generation of the power generation body 3. If the damping spring assembly 22 and the damping rubber stack 41 are not installed, the up-and-down vibration of the vehicle body and the axle will cause great damage to the bearing installed on the fixed shaft 302, which will easily damage the bearing on the fixed shaft 302, and further damage the stator and the rotor, thereby reducing the service life of the power generation body 3. If the damping rubber stack 41 is not installed, the radial and axial vibrations of the axle will also easily damage the bearing on the fixed shaft 302.

[0047] Further, the rotor end cover 314 includes an end cover body and a plurality of bosses 3411 circumferentially arranged on the end cover body, and the bosses 3411 extend along the radial direction of the fixed shaft 302.

[0048] The inner wall of the mounting shell 42 is provided with a plurality of clamping grooves 421 for clamping the bosses 3411, one end of each clamping groove 421 extends to the end face of the mounting shell 42, so that the boss 3411 extends into the clamping groove 421, and the end of the mounting shell 42 forms the limiting table at the position corresponding to each clamping groove 421, and each clamping groove 421 extends in a spiral shape.

[0049] Each of the bosses 3411 extends into the card slot 421 from one end of the card slot 421 and rotates by a set angle in a set direction, so that the boss 3411 is rotated to one end of the card slot 421 away from the end surface of the mounting shell 42, thereby connecting the rotor end cover 314 and the mounting shell 42 together. Through the cooperation of the boss 3411 and the card slot 421, the rotor end cover 314 and the mounting shell 42 can be quickly disassembled. Preferably, three cylindrical bosses 3411 are arranged on the rotor end cover 314, and three card slots 421 are arranged on the mounting shell 42. From the shaft end of the fixed shaft 302, the bosses 3411 on the rotor end cover 314 are rotated into the mounting slots of the mounting shell 42 in the clockwise direction, thereby forming effective connection between the rotor end cover 314 and the mounting shell 42.

[0050] The slot width of the card slot 421 along the axial direction of the fixed shaft is greater than the length of the boss 3411 along the axial direction of the fixed shaft, and the difference between the two is preferably 0.5mm-1mm, so as to allow the boss 3411 to reciprocate along the axial direction of the fixed shaft 302 in the card slot 421, thereby facilitating the damping of the damping rubber stack 41 to the rotor end cover 314. When the axle vibrates along the axial direction of the axle, the mounting shell 42 will vibrate together, and the compression amount of the damping rubber stack 41 will be deformed, so that the rotor end cover 314 can reciprocate along the axial direction of the fixed shaft 302 to adapt to the axial vibration of the axle. In the process of reciprocating the rotor end cover 314, the damping rubber stack 41 is always in contact with the rotor end cover 314 to achieve damping.

[0051] Further, the number of slots of the stator core 305 is 36, and the annular magnet 313 is internally radially magnetized, and the number of poles of the annular magnet 313 is 40, 42 or 48. Since the annular magnet 313 is outside and the stator core 305 is inside, the number of slots of the stator and the number of poles of the rotor can be effectively increased, thereby improving the power density and reliability of the generator 3 at low speed.

[0052] Further, the rotor further comprises an oil seal 311, the outer circular surface of the oil seal 311 is installed in the oil seal 311 chamber of the inner wall of the rotor shell 312, and the inner circular surface is installed on the fixed shaft 302, which can effectively play a sealing and protection role.

[0053] Further, it further comprises a locking nut 1, one end of the fixed shaft 302 is provided with external threads and a shoulder, and this end passes through the cover body 21 and connects the locking nut 1, the locking nut 1 presses the cover body 21 on the shoulder, thereby realizing the close connection of the cover body 21 and the fixed shaft 302.

[0054] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A railway car axle end generator apparatus, comprising: The railway wagon axle end generator device comprises a damping protective cover, a stator, a rotor and a damping coupling, wherein: the stator comprises a coupling plug, a fixed shaft, a stator core and a stator coil, one end of the fixed shaft is provided with the coupling plug and the other end is provided with the stator core, and the stator coil is installed on the stator core; the damping protective cover comprises a cover body and two groups of damping spring assemblies, the cover body is fixedly connected with the fixed shaft, and the fixed shaft is located between the two groups of damping spring assemblies; each group of damping spring assemblies comprises a connecting piece and a damping spring, the connecting piece is fixedly installed on the cover body, the damping spring is vertically installed on the connecting piece, one end of the damping spring is abutted against the cover body and the other end is used for abutting against a vehicle body; the rotor comprises a rotor shell, an annular magnet and a rotor end cover, the rotor shell is installed on the fixed shaft through a bearing, the annular magnet is installed on the inner wall of the rotor shell, the annular magnet is coaxially arranged with the fixed shaft, and the rotor end cover is fixedly installed on the rotor shell; the damping coupling comprises a damping rubber stack and a mounting shell used for connecting with a railway wagon axle, the mounting shell is connected with the rotor end cover, the damping rubber stack is installed in the mounting shell, and the end face of the mounting shell is provided with a limiting table used for preventing the rotor end cover from falling off from the mounting shell, and the damping rubber stack presses the rotor end cover on the limiting table.

2. A railway truck axle end generator apparatus as defined in claim 1 wherein, the rotor end cover comprises an end cover body and a plurality of bosses circumferentially arranged on the end cover body, and the bosses extend along the radial direction of the fixed shaft; the inner wall of the mounting shell is provided with a plurality of clamping grooves used for clamping the bosses, one end of each clamping groove extends to the end face of the mounting shell, so that the boss extends into the clamping groove, and the end of the mounting shell is formed with the limiting table at the position corresponding to each clamping groove, and each clamping groove extends in a spiral shape; each boss extends into the clamping groove from one end of the clamping groove and rotates by a set angle in a set direction, so that the boss is rotated to one end of the clamping groove away from the end face of the mounting shell, and then the rotor end cover and the mounting shell are connected together; the slot width of the clamping groove in the axial direction of the fixed shaft is greater than the length of the boss in the axial direction of the fixed shaft, so as to allow the boss to reciprocate in the clamping groove in the axial direction of the fixed shaft, and facilitate the damping rubber stack to damp the rotor end cover.

3. A railway truck axle end generator apparatus as defined in claim 2 wherein, the difference between the slot width of the clamping groove in the axial direction of the fixed shaft and the length of the boss in the axial direction of the fixed shaft is 0.5-2mm.

4. A railway truck axle end generator apparatus as defined in claim 1 wherein, the slot number of the stator core is 36, the annular magnet is internally radially magnetized, and the magnetic pole is 40, 42 or 48.

5. A railway truck axle end generator apparatus as defined in claim 1 wherein, the outer circle of the annular magnet is coated with glue and adhered to the inner wall of the rotor shell.

6. A railway truck axle end generator apparatus as defined in claim 1 wherein, the magnetic field of the railway wagon axle end generator device is a radial magnetic field.

7. A railway truck axle end generator apparatus as defined in claim 1 wherein, the rotor further comprises an oil seal, the outer circular surface of the oil seal is installed in an oil seal chamber in the inner wall of the rotor shell, and the inner circular surface of the oil seal is installed on the fixed shaft.

8. A railway truck axle end generator apparatus as defined in claim 1 wherein, a locking nut is further provided, one end of the fixed shaft is provided with an external thread and a shoulder, and this end passes through the cover and is connected with the locking nut, and the locking nut presses the cover against the shoulder.

9. A railway truck axle end generator apparatus as defined in claim 1 wherein, the stator and the rotor are located in the cover.

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