Shafting sealing structure of outdoor heavy-load railway vehicle

Abstract

The utility model relates to the technical field of rail transit vehicles, in particular to a shaft system sealing structure of an outdoor heavy-load rail vehicle, which comprises a bearing seat, a bearing arranged in the bearing seat and a rotating shaft rotationally arranged in the bearing, one side of the bearing seat is provided with an inner blocking cover sleeved on the rotating shaft, and the other side of the bearing seat is provided with an outer cover plate. A first sealing piece is arranged between the inner blocking cover and the rotating shaft, a second sealing piece is arranged between the inner blocking cover and the bearing seat, and a third sealing piece is arranged between the outer cover plate and the bearing seat. The probability that moisture and dust enter the space between the inner blocking cover and the rotating shaft is reduced through the first sealing piece, the probability that moisture and dust enter the space between the inner blocking cover and the bearing seat is reduced through the second sealing piece, and the probability that moisture and dust enter the space between the outer cover plate and the bearing seat is reduced through the third sealing piece. And the waterproof performance of the shaft system of the outdoor heavy-load railway vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit vehicles, in particular to an axle system sealing structure of an outdoor heavy-load rail vehicle. Background Art

[0002] The shafting structure is mainly composed of a rotating shaft, a bearing seat and bearings, and is one of the essential components in rail vehicles.

[0003] In the related art, reference may be made to the Chinese invention patent with publication number CN103640590A, which discloses a railway freight car bearing device and a manufacturing method, including a sealed double-row tapered roller bearing, the inner end face of the bearing inner ring is tightly attached to the rear stop, the outer end face of the inner ring is tightly attached to the pressure cover through the shaft end bolts and the anti-loosening plate, the inner hole of the rear stop and the axle dust plate seat are interference fit, the outer ring of the rear stop is covered with the axle box rear cover, a felt oil seal ring is embedded between the inner hole of the axle box rear cover and the outer ring of the rear stop, the axle box rear cover is fastened to the axle box body by the axle box bolts, the inner hole of the axle box body and the bearing outer ring are clearance fit, and the outer end face of the axle box body is fastened to the axle box front cover by the axle box bolts.

[0004] Although the use of felt oil rings for sealing can reduce the entry of dust and impurities into the shaft system structure, the shaft system of heavy-duty rail vehicles used outdoors will be exposed to the outdoor environment for a long time. The outdoor environment has a lot of moisture, and the felt seal is not waterproof enough, thus reducing the waterproof performance of the shaft system of outdoor heavy-duty rail vehicles. Utility Model Content

[0005] In order to improve the waterproof performance of the shaft system of an outdoor heavy-load rail vehicle, the utility model provides a sealing structure for the shaft system of an outdoor heavy-load rail vehicle.

[0006] This application provides an outdoor heavy-load rail vehicle shaft sealing structure, which adopts the following technical solutions:

[0007] A shaft sealing structure for an outdoor heavy-load rail vehicle comprises a bearing seat, a bearing arranged in the bearing seat, and a rotating shaft rotatably arranged in the bearing; an inner stop cover sleeved on the rotating shaft is provided on one side of the bearing seat, an outer cover plate is provided on the other side of the bearing seat, a first seal is provided between the inner stop cover and the rotating shaft, a second seal is provided between the inner stop cover and the bearing seat, and a third seal is provided between the outer cover plate and the bearing seat.

[0008] By adopting the technical scheme, the first sealing member seals between the inner cover and the rotating shaft, reduces the probability of moisture and dust entering between the inner cover and the rotating shaft, the second sealing member seals between the inner cover and the bearing seat, reduces the probability of moisture and dust entering between the inner cover and the bearing seat, and the third sealing member seals between the outer cover plate and the bearing seat, reduces the probability of moisture and dust entering between the outer cover plate and the bearing seat, and the first sealing member, the second sealing member and the third sealing member cooperate to improve the waterproof performance of the outdoor heavy-load railway vehicle shaft system.

[0009] Optionally, the first sealing member is a skeleton oil seal.

[0010] By adopting the technical scheme, the pressure bearing capacity, waterproof performance and durability of the skeleton oil seal are better than those of the felt oil ring, and the skeleton oil seal is selected to seal between the inner cover and the rotating shaft, thereby improving the sealing performance between the rotating shaft and the inner cover.

[0011] Optionally, the skeleton oil seal is a fluororubber skeleton oil seal.

[0012] By adopting the technical scheme, the fluororubber skeleton oil seal with high temperature resistance, chemical resistance and oil resistance is used in the heavy-load railway vehicle shaft system for outdoor use, so as to increase the overall performance of the outdoor heavy-load railway vehicle shaft system.

[0013] Optionally, the second sealing member and the third sealing member are both sealing gaskets.

[0014] By adopting the technical scheme, the sealing gasket has better waterproof performance than the felt oil ring and has wide applicability, and the sealing gasket is selected to seal between the inner cover and the bearing seat and between the outer cover plate and the bearing seat, so as to improve the waterproof performance between the bearing seat and the inner cover and the outer cover plate, and cooperate with the skeleton oil seal to improve the overall waterproof performance of the outdoor heavy-load railway vehicle shaft system.

[0015] Optionally, the sealing gasket is a butyronitrile rubber gasket.

[0016] By adopting the technical scheme, the butyronitrile rubber gasket with excellent wear resistance, oil resistance and heat resistance is used in the heavy-load railway vehicle shaft system for outdoor use, so as to increase the overall performance of the outdoor heavy-load railway vehicle shaft system.

[0017] Optionally, a positioning ring is arranged on the rotating shaft, the first sealing member is arranged between the inner cover and the positioning ring, an outer end of the rotating shaft is provided with a gland, and the gland cooperates with the positioning ring to axially limit the bearing.

[0018] By adopting the technical scheme, the positioning ring and the gland are located on both sides of the bearing and cooperate to axially limit the bearing, so as to improve the stability of the bearing in operation.

[0019] Optionally, an oil cavity is formed between the outer cover plate and the outer end of the rotating shaft, and the roller mounting cavity of the bearing is connected to the oil cavity.

[0020] By adopting the above technical solution, lubricating oil can be added to the ball mounting cavity of the bearing through the oil cavity, so as to improve the use effect of the bearing.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The first seal seals the inner cover and the rotating shaft to reduce the probability of moisture and dust entering between the inner cover and the rotating shaft. The second seal seals the inner cover and the bearing seat to reduce the probability of moisture and dust entering between the inner cover and the bearing seat. The third seal seals the outer cover and the bearing seat to reduce the probability of moisture and dust entering between the outer cover and the bearing seat. The first seal, the second seal and the third seal cooperate to improve the waterproof performance of the outdoor heavy-load rail vehicle shaft system.

[0023] 2. The skeleton oil seal is used to seal the inner cover and the rotating shaft to improve the sealing performance between the rotating shaft and the inner cover. The sealing gasket is used to seal the inner cover and the bearing seat, as well as the outer cover and the bearing seat, to improve the waterproof performance between the bearing seat and the inner cover, as well as between the bearing seat and the outer cover. In combination with the skeleton oil seal, the overall waterproof performance of the shaft system of outdoor heavy-load rail vehicles is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this application;

[0025] Figure 2 is a front view of the sealing structure in this application;

[0026] Figure 3 yes Figure 2 Schematic cross-section of the middle AA;

[0027] Figure 4 yes Figure 3 Enlarged schematic diagram of part B in the middle.

[0028] Figure numerals: 1. bearing seat; 11. inner cover; 12. outer cover; 121. oil chamber; 2. bearing; 21. roller mounting chamber; 3. rotating shaft; 31. running wheel; 32. positioning ring; 33. pressure cover; 4. first seal; 41. skeleton oil seal; 5. second seal; 51. sealing gasket; 6. third seal. DETAILED DESCRIPTION

[0029] The following is combined with Figures 1-4 This application is described in further detail.

[0030] The embodiments of the present application disclose an axle sealing structure for an outdoor heavy-load rail vehicle.

[0031] Reference Figure 1 、 Figure 2 and Figure 3 A shaft sealing structure for an outdoor heavy-load rail vehicle includes a bearing seat 1, a bearing 2 arranged in the bearing seat 1, and a rotating shaft 3 that rotates in the bearing 2. Both ends of the rotating shaft 3 are provided with running wheels 31, and both ends of the rotating shaft 3 have sealing structures. In this embodiment, only the sealing structure on one side of the rotating shaft 3 is used as an example for description.

[0032] Reference Figure 2 、 Figure 3 and Figure 4 One side of the bearing seat 1 is provided with an inner cover 11 sleeved on the rotating shaft 3, and a first seal 4 is provided between the inner cover 11 and the rotating shaft 3. A positioning ring 32 is coaxially fixed on the rotating shaft 3, and the positioning ring 32 is tightly attached to the side of the bearing 2 close to the inner cover 11. The first seal 4 is provided between the inner cover 11 and the positioning ring 32. The first seal 4 is a skeleton oil seal 41. In this embodiment, the skeleton oil seal 41 is made of fluororubber skeleton oil seal 41. In other feasible embodiments, other skeleton oil seals 41 can also be selected, such as nitrile rubber skeleton oil seal 41.

[0033] Reference Figure 2 、 Figure 3 and Figure 4 The inner cover 11 is connected to the bearing seat 1 by bolts. A second sealing member 5 is provided between the inner cover 11 and the bearing seat 1. The second sealing member 5 is a sealing gasket 51. The sealing gasket 51 is tightly pressed between the inner cover 11 and the bearing seat 1. In this embodiment, the sealing gasket 51 is made of nitrile rubber. In other unfortunate embodiments, the sealing gasket 51 can also be made of other materials, such as chloroprene rubber.

[0034] Reference Figure 2 、 Figure 3 and Figure 4 The outer end of the rotating shaft 3 is connected to a pressure cover 33 by bolts. At the same time, the pressure cover 33 is in close contact with the side of the bearing 2 away from the inner cover 11. The pressure cover 33 cooperates with the positioning ring 32 to limit the axial position of the bearing 2.

[0035] Reference Figure 2 、 Figure 3 and Figure 4 An outer cover plate 12 is provided on the other side of the bearing seat 1. The outer cover plate 12 is connected to the bearing seat 1 by bolts, and a third seal 6 is provided between the outer cover plate 12 and the bearing seat 1. The third seal 6 is made of the same material as the second seal 5. An oil chamber 121 is formed between the outer cover plate 12 and the outer end of the rotating shaft 3. The pressure cover 33 is located in the oil chamber 121, and the roller mounting chamber 21 of the bearing 2 is connected to the oil chamber 121.

[0036] Referring to Figure 2 , Figure 3 and Figure 4 , the skeleton oil seal 41 seals between the inner cover 11 and the rotating shaft 3, reduces the probability of moisture and dust entering between the inner cover 11 and the rotating shaft 3, improves the sealing performance between the rotating shaft 3 and the inner cover 11, the sealing gasket 51 seals between the inner cover 11 and the bearing seat 1, the outer cover plate 12 and the bearing seat 1, reduces the probability of moisture and dust entering between the bearing seat 1 and the inner cover 11 and the outer cover plate 12, to improve the waterproof performance between the bearing seat 1 and the inner cover 11 and the outer cover plate 12, and improve the waterproof performance of the outdoor heavy rail vehicle shaft system through the cooperation of the skeleton oil seal 41 and the sealing gasket 51.

[0037] The working principle of the embodiment of the present application is:

[0038] The skeleton oil seal 41 seals between the inner cover 11 and the rotating shaft 3, reduces the probability of moisture and dust entering between the inner cover 11 and the rotating shaft 3, improves the sealing performance between the rotating shaft 3 and the inner cover 11, the sealing gasket 51 seals between the inner cover 11 and the bearing seat 1, the outer cover plate 12 and the bearing seat 1, reduces the probability of moisture and dust entering between the bearing seat 1 and the inner cover 11 and the outer cover plate 12, to improve the waterproof performance between the bearing seat 1 and the inner cover 11 and the outer cover plate 12, and improve the waterproof performance of the outdoor heavy rail vehicle shaft system through the cooperation of the skeleton oil seal 41 and the sealing gasket 51.

[0039] The above are preferred embodiments of the present application, not limited to the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A shaft sealing structure for outdoor heavy-load rail vehicles, characterized by: The invention comprises a bearing seat (1), a bearing (2) arranged in the bearing seat (1), and a rotating shaft (3) rotatably arranged in the bearing (2); an inner stopper (11) sleeved on the rotating shaft (3) is provided on one side of the bearing seat (1); an outer cover (12) is provided on the other side of the bearing seat (1); a first sealing member (4) is provided between the inner stopper (11) and the rotating shaft (3); a second sealing member (5) is provided between the inner stopper (11) and the bearing seat (1); and a third sealing member (6) is provided between the outer cover (12) and the bearing seat (1).

2. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 1, characterized in that: The first sealing component (4) is a skeleton oil seal (41).

3. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 2, characterized in that: The skeleton oil seal (41) is a fluororubber skeleton oil seal (41).

4. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 2, characterized in that: The second sealing member (5) and the third sealing member (6) are both sealing gaskets (51).

5. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 4, characterized in that: The sealing gasket (51) is a nitrile rubber gasket.

6. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 1, characterized in that: A positioning ring (32) is provided on the rotating shaft (3), the first sealing member (4) is provided between the inner stop cover (11) and the positioning ring (32), a pressure cover (33) is provided at the outer end of the rotating shaft (3), and the pressure cover (33) cooperates with the positioning ring (32) to axially limit the bearing (2).

7. The outdoor heavy-load rail vehicle shaft sealing structure according to claim 1, characterized in that: An oil cavity (121) is formed between the outer cover plate (12) and the outer end of the rotating shaft (3), and the roller mounting cavity (21) of the bearing (2) is communicated with the oil cavity (121).

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