A sealed end cover for a disc generator

Abstract

The application discloses a sealed end cover of a disc generator, which is installed on the disc generator, and the magnetic induction lines of permanent magnets on a coil rotating cutting rotor mechanism installed on the end cover are cut to generate electric energy; the end cover is assembled by a front shell and a rear cover plate; the rear side of the front shell is fixed with the coil, the middle part of the front shell is protruded forward to form a sub-cavity for accommodating a bearing, a bearing positioning seat is arranged on the sub-cavity, the front end of the rotor mechanism penetrates into the sub-cavity and is connected with the bearing; the rear cover plate is annular, the rear end of the rotor mechanism penetrates out of the middle part of the rear cover plate, the outer edge of the rear cover plate is attached to the rear end surface of the front shell to form a cavity, and the inner edge of the rear cover plate is close to the rotor mechanism to form a labyrinth seal. By setting the end cover, the coil and the rotor mechanism are covered in the end cover, so that external interference can be isolated to a certain extent, the stability of the equipment is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of generator technology, in particular to a sealed end cover of disc type generator. BACKGROUND

[0002] With the continuous development of railway freight transportation, the intelligentization of railway freight cars and the safety monitoring of goods are gradually put on the agenda. For example, the train may be equipped with all-electric braking and electric air braking, which requires long-term, stable and reliable power supply for freight cars. For example, the goods loaded on the train need to be monitored and the monitoring data need to be transmitted back to the monitoring center in a timely manner, which also requires stable power supply. The running environment of railway freight cars is relatively harsh, and they will be eroded by dust, rain and other factors during long-term service. The early axle end generator used in railway passenger cars mainly adopts belt drive, and the generator is hung on the front and rear ends of the frame, and a pulley is installed at the axle to connect the generator. This generator uses the traditional sealing of the generator, which is not suitable for harsh environment and unstable vibration of railway freight cars. Therefore, a sealed end cover of disc type generator is needed. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a sealed end cover of disc type generator.

[0004] To solve the above technical problems, the present application adopts the following technical scheme:

[0005] A sealed end cover of disc type generator, the end cover is installed on the disc type generator, the magnetic induction lines of the permanent magnet on the rotating cutting rotor mechanism of the coil installed on the end cover generate electric energy; the end cover is assembled by a front shell and a rear cover plate; the rear side of the front shell is fixed with the coil, the middle part protrudes forward to form a sub-cavity for accommodating the bearing, a bearing positioning seat is arranged on the sub-cavity, the front end of the rotor mechanism penetrates into the sub-cavity and is connected with the bearing; the rear cover plate is annular, the rear end of the rotor mechanism penetrates out from the middle part thereof, the outer edge of the rear cover plate is attached to the rear end face of the front shell to form a cavity, and the inner edge is close to the rotor mechanism to form a labyrinth seal.

[0006] As a further improvement of the above technical scheme:

[0007] The sub-cavity is inwardly protruding and formed with a limiting table for limiting the forward movement of the bearing, a bearing positioning seat for limiting the rearward movement of the bearing is mounted on the rear side of the sub-cavity, and the bearing positioning seat is annular.

[0008] At least two bearings are fixed in the sub-cavity, a limiting ring is installed between adjacent bearings, and the bearings are squeezed in the axial direction through the limiting ring.

[0009] The front shell is symmetrically provided with a pair of fixed supports for limiting rotation of the generator, and the fixed supports are connected with the external bearing saddle.

[0010] The front shell is symmetrically provided with a pair of fixed supports for limiting rotation of the generator, and the fixed supports are connected with the external bearing saddle.

[0011] The generator further comprises a terminal box fixed on the front side of the front shell, and the terminal box is internally provided with terminal posts, and the lead wires on the coil pass through the front shell into the terminal box and are connected with the terminal posts.

[0012] The end cover is internally provided with a plurality of coils which are arranged in a ring shape, and the coils are composed of coil supports and generator coils wound thereon; the front shell is rearwardly formed with a plurality of sealing tubes, and the coil supports are embedded in the sealing tubes.

[0013] The middle part of the coil support is formed with a through hole, the front shell is formed with a plurality of through openings, the through hole is aligned with the openings and simultaneously inserted into a sealing plug, and the sealing plug is glued between the through hole and the opening.

[0014] The rotor mechanism comprises a rotor disc and a permanent magnet connected with the rotor disc, the middle part of the rotor disc is forwardly formed with a rotating shaft, the rotating shaft is perpendicular to the end cover, and the front end of the rotating shaft penetrates into the secondary cavity and is connected with the bearing; the rotating shaft is formed with a boss for limiting rearward movement of the bearing, and is further provided with an annular cover plate for limiting forward movement of the bearing, and the annular cover plate is fixed with the rotating shaft by means of a lock bolt.

[0015] The rotor disc is formed with mounting holes which are aligned with screw holes of the external axle end cover, and the rotor disc is connected with the external axle end cover by means of a screw bolt.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] By arranging the end cover, the coil and the rotor mechanism are covered therein, so that external interference can be isolated to a certain extent, the stability of the equipment is improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the end cover (view angle I);

[0019] Figure 2 is a structural schematic view of the end cover (view angle II);

[0020] Figure 3 is a sectional view of the end cover (containing the bearing);

[0021] Figure 4 is an assembly schematic view of the coil support and the sealing plug;

[0022] Figure 5is an assembly diagram (cross section) of the generator and the external axle end cover.

[0023] In the figure, the numbers represent: 1, coil; 11, coil support; 111, through hole; 2, rotor mechanism; 21, rotor disc; 211, mounting hole; 22, permanent magnet; 23, rotating shaft; 231, boss; 232, ring cover plate; 233, anti-loosening bolt; 3, end cover; 31, front housing; 311, sub-cavity; 312, limiting platform; 313, bearing positioning seat; 314, limiting ring; 315, fixed support; 316, blowdown hole; 317, sealing cylinder; 318, opening; 319, sealing plug; 32, rear cover plate; 4, bearing; 5, terminal box; 6, external axle end cover. DETAILED DESCRIPTION

[0024] The application will be further described in detail below in conjunction with the drawings and specific examples.

[0025] EXAMPLE

[0026] As Figures 1 to 5As shown, the sealed end cover of the disc generator in the embodiment is mounted on the disc generator, the coil 1 mounted on the end cover 3 cuts the magnetic induction lines of the permanent magnet 22 on the rotor mechanism 2 to generate electric energy; the end cover 3 is assembled by a front shell 31 and a rear cover plate 32; the rear side of the front shell 31 is fixed with the coil 1, the middle part thereof protrudes forward to form a sub-cavity 311 for accommodating the bearing 4, the sub-cavity 311 is provided with a bearing positioning seat 313, the front end of the rotor mechanism 2 penetrates into the sub-cavity 311 and is connected with the bearing 4; the rear cover plate 32 is annular, the rear end of the rotor mechanism 2 penetrates out of the middle part thereof, the outer edge of the rear cover plate 32 is attached to the rear end face of the front shell 31 to form a cavity, and the inner edge thereof is close to the rotor mechanism 2 to form a labyrinth seal. The generator adopts a single-stator-rotor disc structure, the coil 1 and the rotor mechanism 2 are covered in the end cover 3, so that external interference can be isolated to a certain extent, the stability of the equipment is improved, and the service life is prolonged. Specifically, the end cover 3 is made of nylon material (non-magnetic material) by 3D printing, which is assembled by the front shell 31 and the rear cover plate 32, and the two are connected by glue or bolts. When the bolt connection is adopted, the bolt penetrates through the rear of the front shell 31 and is connected with the nut fixed in the rear cover plate 32. In order to position correctly, the positioning step 321 is formed on the side of the rear cover plate 32 facing the front shell 31, the outer edge of the positioning step 321 is attached to the inner edge of the front shell 31, and the end face of the front shell 31 contacts the outer edge of the rear cover plate 32 to form a seal. The rear side of the front shell 31 (i.e. the inner side of the cavity) is fixed with the coil 1, and the coil 1 is attached to the front shell 31 and does not rotate; the rotor mechanism 2 is located behind the coil 1, the rear end thereof penetrates out of the middle part of the annular rear cover plate 32 and is connected with an external driving mechanism (in this embodiment, the external driving mechanism is an external axle end cover 6), under the driving of the external driving mechanism, the rotor mechanism 2 rotates relative to the coil 1, so that the coil 1 can cut the magnetic induction lines of the permanent magnet 22 on the rotor mechanism 2 and generate electric energy. In order to improve the stability of the rotor mechanism 2, the sub-cavity 311 is formed in the middle part of the front shell 31, the sub-cavity 311 is a closed shell, which protrudes forward and is provided with the bearing 4, the front end of the rotor mechanism 2 penetrates into the sub-cavity 311 and is installed in cooperation with the bearing 4, the bearing 4 provides radial support for the rotor mechanism 2 to ensure that the rotation axis of the rotor mechanism 2 is always perpendicular to the end cover 3, thereby avoiding friction and rotation between the rotor mechanism 2, the coil 1 and the end cover 3. Further, the sub-cavity 311 is inwardly protruding and is provided with a limiting table 312 for limiting the forward movement of the bearing 4, and the rear side of the sub-cavity 311 is provided with a bearing positioning seat 313 for limiting the rearward movement of the bearing 4, and the bearing positioning seat 313 is annular. Two roller bearings 4 are fixed in the sub-cavity 311, a limiting ring 314 is installed between the two bearings 4, and the bearings 4 are squeezed in the axial direction through the limiting ring 314.The limiting ring 314 is located in the gap between the two bearings 4, one end of which is in contact with the rear end of the front bearing 4 and the other end is in contact with the front end of the rear bearing 4. The limiting ring 314 pushes the front bearing 4 forward and makes the front side of the front bearing 4 tightly contact with the limiting platform 312. At the same time, the limiting ring 314 pushes the rear bearing 4 backward and makes the rear side of the rear bearing 4 tightly contact with the bearing positioning seat 313. In this way, the two bearings 4 are completely fixed in the axial direction in the sub-cavity 311 and cannot move. Furthermore, the bearing positioning seat 313 is connected with the front shell 31 by bolts, the bolts pass through the front shell 31 and are connected with the nuts fixed in the bearing positioning seat 313, and the bolts are prevented from loosening by passing through the screw head with a wire. The outer edge of the rear cover plate 32 is in contact with the rear end surface of the front shell 31 to form a cavity, and the inner edge is close to the rotor mechanism 2 to form a labyrinth seal.

[0027] In this embodiment, a pair of fixed supports 315 for limiting the rotation of the generator are symmetrically arranged on both sides of the front shell 31, and the ends of the fixed supports 315 are connected with the external bearing saddle. Specifically, recesses are formed on both sides of the front shell 31, and the fixed supports 315 are embedded in the recesses. The fixed supports 315 are strip-shaped plates connected with the front shell 31 by bolts. The ends of the fixed supports 315 are directed towards the external vehicle body and cooperate with the external bearing saddle to limit the rotation of the front shell 31.

[0028] In this embodiment, a plurality of blow-off holes 316 are formed on the lower side of the front shell 31. By arranging the blow-off holes 316 on the lower side of the front shell 31, the water and dust entering the cavity of the end cover 3 can be discharged through the blow-off holes 316, thereby avoiding accumulation.

[0029] In this embodiment, the generator further includes a junction box 5 fixed on the front side of the front shell 31. The junction box 5 is internally provided with terminal blocks, and the leads on the coil 1 pass through the front shell 31 and are connected with the terminal blocks. The junction box 5 is assembled by two half-shells, one of which is fixed with the front shell 31 by bolts.

[0030] In this embodiment, a plurality of coils 1 are installed in the end cover 3, which are arranged in a ring shape. The coil 1 is composed of a coil support 11 and a power generation coil wound thereon. A plurality of sealing cylinders 317 are formed on the rear side of the front shell 31, and the coil support 11 is embedded in the sealing cylinder 317. A through hole 111 is formed in the middle of the coil support 11, and a plurality of through openings 318 are formed on the front shell 31. The through hole 111 is aligned with the opening 318 and simultaneously inserted into a sealing plug 319. The sealing plug 319 is glued between the through hole 111 and the opening 318. By arranging the opening 318 on the front shell 31 and positioning the opening 318 corresponding to the position of the through hole 111 formed in the middle of the coil support 11, the coil support 11 can be positioned through the opening 318.

[0031] In the embodiment, the rotor mechanism 2 comprises a rotor disc 21 and a permanent magnet 22 connected thereto, the middle part of the rotor disc 21 is shaped forwardly with a rotating shaft 23, the rotating shaft 23 is perpendicular to the end cover 3, and the front end of the rotating shaft 23 penetrates into the sub-cavity 311 and is connected with the bearing 4; the rotating shaft 23 is shaped with a boss 231 for limiting the backward movement of the bearing 4, and is further provided with an annular cover plate 232 for limiting the forward movement of the bearing 4, the annular cover plate 232 is fixed with the rotating shaft 23 through a lock bolt 233. Specifically, the rotor disc 21 is shaped with a plurality of grooves, the grooves are glued with arc-shaped permanent magnets 22, the number of the permanent magnets 22 is even, and the magnetic pole magnetic field directions of adjacent permanent magnets 22 are opposite.

[0032] In the embodiment, the rotor disc 21 is shaped with a mounting hole 211, the mounting hole 211 is aligned with the screw hole of the external axle end cover 6, the rotor disc 21 is connected with the external axle end cover 6 through a bolt. Under the driving of the external axle end cover 6, the rotor disc 21 rotates relative to the coil 1 together with the permanent magnet 22 connected thereto, so that the coil 1 cuts the magnetic induction lines of the permanent magnet 22 to generate electric energy. Since the mounting hole 211 is aligned with the screw hole of the external axle end cover 6, during the installation, only the bolts of the external axle end cover 6 are removed, then the rotor disc 21 is attached to the external axle end cover 6, and the removed bolts are tightened again; during the removal, the reverse operation is performed. It can be seen that by arranging the rotor disc 21 and the mounting hole 211 aligned with the screw hole of the external axle end cover 6 on the rotor disc 21, the generator can be installed without changing the original structure of the railway wagon, and the installation and removal operations are extremely simple.

[0033] Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the technical contents disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, shall fall within the scope of protection of the technical solutions of the present application.

Claims

1. A sealed end cover for a disc generator, characterized in that: The end cover (3) is installed on the disc generator. The coil (1) installed on the end cover (3) rotates and cuts the magnetic field lines of the permanent magnet (22) on the rotor mechanism (2) to generate electrical energy. The end cover (3) is assembled from the front housing (31) and the rear cover plate (32). The rear side of the front housing (31) is fixed to the coil (1). The middle part of the front housing protrudes forward to form a secondary cavity (311) for accommodating the bearing (4). The secondary cavity (311) is provided with a bearing positioning seat (313). The front end of the rotor mechanism (2) passes through the secondary cavity (311) and is connected to the bearing (4). The rear cover plate (32) is annular. The rear end of the rotor mechanism (2) passes through the middle part. The outer edge of the rear cover plate (32) fits with the rear end face of the front housing (31) to form a cavity. Its inner edge is close to the rotor mechanism (2) to form a labyrinth seal. The end cap (3) is equipped with several coils (1) arranged in a ring. The coil (1) consists of a coil support (11) and a power generation coil wound on it. The front housing (31) is formed with several sealing cylinders (317) rearward. The coil support (11) is embedded in the sealing cylinder (317). The coil support (11) has a through hole (111) formed in the middle, and the front housing (31) has several through openings (318). The through hole (111) and the opening (318) are aligned and a sealing plug (319) is inserted at the same time. The sealing plug (319) and the through hole (111) and the sealing plug (319) and the opening (318) are glued together.

2. The sealed end cover of the disc generator according to claim 1, characterized in that: The sub-cavity (311) has an inwardly protruding limiting platform (312) for restricting the forward movement of the bearing (4), and the rear side cover of the sub-cavity (311) is equipped with a bearing positioning seat (313) for restricting the backward movement of the bearing (4), and the bearing positioning seat (313) is annular.

3. The sealed end cover of the disc generator according to claim 2, characterized in that: At least two bearings (4) are fixed inside the secondary cavity (311), and a limiting ring (314) is installed between adjacent bearings (4). The bearings (4) are squeezed axially by the limiting ring (314).

4. The sealed end cover of the disc generator according to claim 1, characterized in that: The front housing (31) is symmetrically provided with a pair of fixed brackets (315) for limiting the rotation of the generator. The ends of the fixed brackets (315) are connected to the external bearing saddle.

5. The sealed end cover of the disc generator according to claim 1, characterized in that: The lower side of the front housing (31) is formed with several drain holes (316).

6. The sealed end cover of the disc generator according to claim 1, characterized in that: The generator also includes a junction box (5) fixed to the front side of the front housing (31). The junction box (5) has a built-in terminal block. The lead wire on the coil (1) passes through the front housing (31) into the junction box (5) and is connected to the terminal block.

7. The sealed end cover of the disc generator according to claim 1, characterized in that: The rotor mechanism (2) includes a rotor disk (21) and a permanent magnet (22) connected thereto. A rotating shaft (23) is formed in the middle of the rotor disk (21) facing forward. The rotating shaft (23) is perpendicular to the end cover (3), and its front end passes through the secondary cavity (311) and is connected to the bearing (4). The rotating shaft (23) is formed with a boss (231) for restricting the bearing (4) from moving backward, and is also covered with an annular cover plate (232) for restricting the bearing (4) from moving forward. The annular cover plate (232) is fixed to the rotating shaft (23) by anti-loosening bolts (233).

8. The sealed end cover of the disc generator according to claim 7, characterized in that: The rotor disk (21) has a mounting hole (211) formed on it. The mounting hole (211) is aligned with the screw hole of the external axle end cover (6). The rotor disk (21) is connected to the external axle end cover (6) by bolts.

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