CN112389486A - Lubricating and sealing structure of wheel shaft driving system - Google Patents
Lubricating and sealing structure of wheel shaft driving system Download PDFInfo
- Publication number
- CN112389486A CN112389486A CN202011557013.0A CN202011557013A CN112389486A CN 112389486 A CN112389486 A CN 112389486A CN 202011557013 A CN202011557013 A CN 202011557013A CN 112389486 A CN112389486 A CN 112389486A
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- Prior art keywords
- sealing
- gear
- bearing
- shaped rubber
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F15/00—Axle-boxes
- B61F15/20—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
- B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F15/00—Axle-boxes
- B61F15/20—Details
- B61F15/22—Sealing means preventing entrance of dust or leakage of oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F17/00—Lubrication specially adapted for axle-boxes of rail vehicles
- B61F17/02—Lubrication specially adapted for axle-boxes of rail vehicles with oil
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Details Of Gearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
The invention relates to the technical field of wheel axle driving systems, in particular to a lubricating and sealing structure of a wheel axle driving system. The lubricating and sealing structure of the wheel axle driving system comprises an axle, wheels, a gear box, an axle suspension box and a traction motor, wherein the torque output by the traction motor is transmitted to the axle and the wheels through a driven gear and a driving gear in the gear box; the wheel shaft driving device can effectively prevent lubricating oil in the gear box from entering the driving bearing chamber, and can prevent bearing grease in the bearing chamber from entering the gear box, so that mixed pollution of two lubricating media is avoided, and the lubricating stability of the gear and the bearing is ensured.
Description
Technical Field
The invention relates to a lubricating and sealing structure, in particular to a lubricating and sealing structure of a wheel shaft driving system.
Background
When the existing locomotive runs, the temperature and the pressure of lubricating oil in a box body are increased due to the transmission of an inner gear of a gear box of a wheel shaft driving device, and the leakage of the lubricating oil, which causes the leakage of the lubricating oil at the air holes of an axle suspension box and the dynamic seal position of the gear box, cannot be effectively prevented by the original sealing structure; and when the gear meshes, the meshing force can be transmitted to the gear box body through the bearing, so that the gear box body deforms, the gap between the end cover of the traction motor and the gear box body is increased, and the lubricating oil leaks due to failure of static seal. Unreliable sealing performance of the wheel shaft driving device can lead to the continuous reduction of the amount of lubricating oil in the gear box, thereby not only influencing the stability of the lubrication of a traction gear and a bearing, but also polluting the environment.
The invention is a wheel driving device with patent number CN201810153678.1, the name of the invention is wheel driving device, the wheel driving device is provided with a speed reducing mechanism for reducing the speed of the rotation transmitted from the driving source; a rotating body to which rotation reduced by a reduction mechanism is transmitted and which is integrated with a wheel; a fixed member for rotatably supporting the rotating body; an oil seal disposed between the rotating body and the fixed member and sealing a space in which the speed reduction mechanism is accommodated; and a lubricant sealed in a sealed space sealed by the oil seal, wherein the lubricant includes at least 2 kinds of lubricants having different mixed consistencies from each other, but the lubricant is applied at a different place and has a completely different structure.
Disclosure of Invention
The invention aims to solve the defects and provides a lubricating and sealing structure of a wheel axle driving system.
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: the lubricating and sealing structure of the wheel axle driving system comprises an axle, wheels, a gear box, an axle suspension box and a traction motor, wherein the torque output by the traction motor is transmitted to the axle and the wheels through a driven gear and a driving gear in the gear box, lubricating oil for splash lubrication of the driven gear, the driving gear and a motor bearing is arranged at the bottom of the gear box,
the gear box adopts a totally enclosed structure;
two retainer ring holes on the driving gear side of the gear box and the traction motor form a static sealing structure through an O-shaped rubber ring II, an O-shaped rubber ring III and an O-shaped rubber ring IV;
one of two retainer ring holes on the driven gear side of the gear box and the axle suspension box form a static sealing structure through an O-shaped rubber ring I, and a sealing ring I is arranged on the other retainer ring hole to form a dynamic seal with a sealing tooth groove on the driven gear;
the driving bearing is lubricated by bearing grease;
the transmission end of the axle suspension box is provided with a second sealing ring, a third sealing ring and an axle to form a sealing structure which can prevent bearing grease of the bearing chamber from entering the gear box to pollute gear oil and can prevent lubricating oil of the gear box from entering the bearing chamber to pollute the bearing grease.
According to another embodiment of the invention, the dynamic seal formed by the seal ring and the driven gear is a combined seal form of an axial seal and a radial seal, and the whole sealing structure is in a step shape.
According to another embodiment of the invention, the driven gear is further provided with a sealing tooth groove.
According to another embodiment of the invention, the axle suspension box and the sealing ring are provided with vent holes for preventing lubricating oil in the gear box from entering the driving bearing chamber and ensuring the lubricating stability of the driving bearing.
According to another embodiment of the present invention, the second and third seal rings are provided with a cavity and an oil slinging inclined surface.
According to another embodiment of the invention, the second O-shaped rubber ring, the third O-shaped rubber ring and the fourth O-shaped rubber ring are arranged in a groove on the end cover of the traction motor, and a sealing glue layer is coated on the end cover of the traction motor and between the third O-shaped rubber ring and the fourth O-shaped rubber ring.
The invention has the beneficial effects that: the lubricating and sealing structure of the wheel shaft driving system has reliable static sealing and dynamic sealing structures, and can effectively prevent gear oil from leaking, so that the oil quantity of the gears in the gear box is ensured, and the lubricating stability of the gears and bearings is ensured; the wheel shaft driving device can effectively prevent lubricating oil in the gear box from entering the driving bearing chamber, and can prevent bearing grease in the bearing chamber from entering the gear box, so that mixed pollution of two lubricating media is avoided, and the lubricating stability of the gear and the bearing is ensured.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the lubrication system of the axle drive system of the present invention;
FIG. 2 is a schematic structural view of the seal structure shown in cross-section in FIG. 1;
FIG. 3 is a schematic structural view of portion I of FIG. 2;
FIG. 4 is a schematic structural view of section II of FIG. 2;
FIG. 5 is a schematic view of the structure of part III in FIG. 2
Wherein: 1. the device comprises an axle, 2, wheels 3, a gear box 4, an axle suspension box 5, a traction motor 6, first sealing rings, 7, a driven gear, 8, second sealing rings, 9, third sealing rings, 10, first O-shaped rubber rings, 11, a driving bearing, 12, second O-shaped rubber rings, 13, a driving gear, 14, third O-shaped rubber rings, 15, fourth O-shaped rubber rings, 16 and a motor bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the lubricating device of the wheel axle driving system mainly comprises an axle 1, wheels 2, a gear box 3, an axle suspension box 4 and a traction motor 5, wherein the gear box 3 comprises a driven gear 7, a driving bearing 11, a driving gear 13 and a motor bearing 16.
In order to enable the existing rolling stock wheel shaft driving system to have the performance of more stable lubrication and more reliable sealing, a first sealing ring 6, a second sealing ring 8, a third sealing ring 9, a first O-shaped rubber ring 10, a second O-shaped rubber ring 12, a third O-shaped rubber ring 14, a fourth O-shaped rubber ring 15 and the like are additionally arranged.
The torque output by the traction motor 5 is transmitted to the axle 1 and the wheels 2 through the driven gear 7 and the driving gear 13, and is finally converted into traction force to drive the locomotive to run. The bottom of the gear box 3 is filled with lubricating oil for splash lubrication of the driven gear 7, the driving gear 13 and the motor bearing 16. The gear box 3 adopts a fully-closed structure to ensure good sealing performance, so that the lubrication stability of the driven gear 7, the driving gear 13 and the motor bearing 16 is ensured. Two retainer ring holes on the driving gear side of the gear box 3 and the traction motor 5 form a static sealing structure through an O-shaped rubber ring II 12, an O-shaped rubber ring III 14 and an O-shaped rubber ring IV 15, one of the two retainer ring holes on the driven gear side of the gear box 3 and the axle suspension box 4 form a static sealing structure through an O-shaped rubber ring I10, and a sealing ring I6 arranged on the other retainer ring and a sealing tooth groove on the driven gear 7 form dynamic sealing. The driving bearing 11 is lubricated by bearing grease, and a sealing structure formed by the axle suspension box 4, the second sealing ring 8, the third sealing ring 9 and the axle 1 can prevent the bearing grease in the bearing chamber from entering the gear box to pollute gear oil and prevent lubricating oil in the gear box from entering the bearing chamber to pollute the bearing grease, so that the good lubricating performance of the driving bearing 11, the driven gear 7, the driving gear 12 and the motor bearing 13 is ensured.
When the gear is meshed, the meshing force can be transmitted to the gear box 3 through the motor bearing 16, so that the gear box 3 deforms, the local gap between the gear box 3 and the traction motor 5 is increased, the groove is formed in the end cover of the traction motor 5, the O-shaped rubber ring II 12, the O-shaped rubber ring III 14 and the O-shaped rubber ring IV 15 are arranged, and sealant is smeared between the two rubber rings of the O-shaped rubber ring III 14 and the O-shaped rubber ring IV 15, as shown in fig. 3, the gap change caused by the deformation of the gear box 3 can be effectively compensated, and the gear oil leakage is prevented.
The gear rotates to increase the temperature and the pressure of lubricating oil in the gear box 3, and the lubricating oil flows to a dynamic seal gap and a cavity formed by the first sealing ring 6 and the driven gear 7 due to the pressure difference between the inside and the outside of the gear box 3. The dynamic seal formed by the first sealing ring 6 and the driven gear 7 is a combined seal form of axial seal and radial seal, and the whole sealing structure is in a step shape, as shown in fig. 4, the pressure of lubricating oil can be effectively released, and therefore the reliability of the sealing structure is guaranteed.
The sealing tooth grooves are directly formed in the driven gear 7, as shown in fig. 4, the sealing element can be prevented from expanding when the sealing element is pressed on the gear in an interference mode, the sealing gap is too small, even the sealing element is in contact grinding with the first sealing ring 6, the space can be saved, the area of a sealing cavity is increased, and therefore good sealing performance is guaranteed.
An air hole is formed between the axle suspension box 4 and the third sealing ring 9, so that lubricating oil in the gear box 3 is prevented from entering the driving bearing 11 chamber, and the lubricating stability of the driving bearing 11 is ensured. Meanwhile, cavities and oil throwing inclined planes are added on the second sealing ring 8 and the third sealing ring 9, as shown in fig. 5, so that the pressure of lubricating oil is attenuated, the lubricating oil is prevented from leaking through air holes, the lubricating oil quantity in the gear box 3 is ensured, and the lubricating stability of the driven gear 7, the driving gear 13 and the motor bearing 16 is ensured.
The effect of the overall structure includes:
1. through two static sealing structures of the O-shaped rubber ring III and the O-shaped rubber ring IV and the coating of sealant between the two rubber rings, the gap change caused by the deformation of the gear box is compensated, and the leakage of gear oil can be effectively prevented;
2. the dynamic seal formed by the first seal ring and the driven gear adopts a combined seal form of axial seal and radial seal, and the whole seal structure adopts a stepped seal structure, so that the pressure of lubricating oil can be effectively released, and the reliability of the seal structure is improved;
3. the sealing tooth grooves are directly formed in the driven gear, so that the expansion of the sealing element caused by interference press-fitting of the sealing element on the gear can be avoided, the sealing gap is too small, even the sealing element and the sealing ring are ground, the space can be saved, the area of a sealing cavity is increased, and the good sealing performance is ensured;
4. three vent holes are formed in the axle suspension box and the sealing ring, so that lubricating oil in the gear box can be effectively prevented from entering the driving bearing chamber, and the lubricating stability of the driving bearing is ensured;
5. increase cavity and get rid of oily inclined plane on sealing washer two and sealing washer three to the pressure of decay lubricating oil avoids lubricating oil to reveal through the air vent, thereby guarantees the lubricated oil mass in the gear box, has ensured driven gear, driving gear and motor bearing lubricated stability.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A lubrication sealing structure of a wheel axle driving system comprises an axle (1), wheels (2), a gear box (3), an axle suspension box (4) and a traction motor (5), wherein the torque output by the traction motor (5) is transmitted to the axle (1) and the wheels (2) through a driven gear (7) and a driving gear (13) in the gear box (3), and the bottom of the gear box (3) is provided with lubricating oil for splash lubrication of the driven gear (7), the driving gear (13) and a motor bearing (16), which is characterized in that,
two retainer ring holes on the driving gear side of the gear box (3) and the traction motor (5) form a static sealing structure through an O-shaped rubber ring II (12), an O-shaped rubber ring III (14) and an O-shaped rubber ring IV (15);
one of two retainer ring holes on the driven gear side of the gear box (3) and the axle suspension box (4) form a static sealing structure through an O-shaped rubber ring I (10), and a sealing ring I (6) is arranged on the other retainer ring hole to form a dynamic seal with a sealing tooth groove on the driven gear (7);
the transmission end of the axle suspension box (4) is provided with a second sealing ring (8), a third sealing ring (9) and the axle (1) to form a sealing structure which can prevent bearing grease of the bearing chamber from entering the gear box to pollute gear oil and can prevent lubricating oil of the gear box from entering the bearing chamber to pollute the bearing grease.
2. The wheel axle drive system lubrication sealing structure as defined in claim 1, wherein the dynamic seal formed by the first sealing ring (6) and the driven gear (7) is a combined seal form of an axial seal and a radial seal, and the whole sealing structure is stepped.
3. The wheel axle driving system lubricating and sealing structure as claimed in claim 1, characterized in that the driven gear (7) is provided with a sealing tooth groove.
4. The wheel axle drive system lubrication sealing structure according to claim 1, characterized in that the axle suspension box (4) and the third sealing ring (9) are provided with vent holes (19) for preventing the lubricating oil in the gear box (3) from entering the drive bearing (11) chamber and ensuring the lubrication stability of the drive bearing (11).
5. The wheel axle driving system lubricating and sealing structure as claimed in claim 1, characterized in that the second sealing ring (8) and the third sealing ring (9) are provided with a cavity (18) and an oil slinging inclined surface (17).
6. Wheel axle drive system lubrication and sealing arrangement according to claim 1, characterised in that the gearbox (3) is of a totally enclosed construction.
7. Wheel axle drive system lubrication sealing arrangement according to claim 1, characterised in that the drive bearing (11) is lubricated with bearing grease.
8. The wheel axle driving system lubricating and sealing structure as claimed in claim 1, characterized in that the O-shaped rubber ring II (12), the O-shaped rubber ring III (14) and the O-shaped rubber ring IV (15) are arranged in a slot on an end cover of the traction motor (5), and a sealing glue layer is coated on the end cover of the traction motor (5) and between the O-shaped rubber ring III (14) and the O-shaped rubber ring IV (15).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557013.0A CN112389486A (en) | 2020-12-25 | 2020-12-25 | Lubricating and sealing structure of wheel shaft driving system |
| PCT/CN2021/123039 WO2022134739A1 (en) | 2020-12-25 | 2021-10-11 | Axle drive system lubricating and sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557013.0A CN112389486A (en) | 2020-12-25 | 2020-12-25 | Lubricating and sealing structure of wheel shaft driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112389486A true CN112389486A (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011557013.0A Pending CN112389486A (en) | 2020-12-25 | 2020-12-25 | Lubricating and sealing structure of wheel shaft driving system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112389486A (en) |
| WO (1) | WO2022134739A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439911A (en) * | 2022-01-28 | 2022-05-06 | 大连华锐重工集团股份有限公司 | Lubricating and sealing system of traveling driving speed reducer of large-axle-weight metallurgical vehicle |
| WO2022134739A1 (en) * | 2020-12-25 | 2022-06-30 | 中车戚墅堰机车有限公司 | Axle drive system lubricating and sealing structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19860559B4 (en) * | 1998-12-22 | 2015-03-05 | Daimlerchrysler Rail Systems Gmbh | Device for sealing gearboxes of rail vehicles |
| CN201083264Y (en) * | 2007-07-27 | 2008-07-09 | 南车株洲电力机车有限公司 | Labyrinth combined locomotive power vehicle gear drive system lubricating device |
| CN102874262A (en) * | 2012-10-18 | 2013-01-16 | 南车株洲电力机车有限公司 | Large power alternating current transmission locomotive and driving device thereof |
| CN106884972B (en) * | 2017-03-02 | 2024-03-29 | 中车戚墅堰机车车辆工艺研究所股份有限公司 | Labyrinth sealing structure of input shaft of gear box |
| JP6886315B2 (en) * | 2017-03-09 | 2021-06-16 | 住友重機械工業株式会社 | Wheel drive |
| CN112389486A (en) * | 2020-12-25 | 2021-02-23 | 中车戚墅堰机车有限公司 | Lubricating and sealing structure of wheel shaft driving system |
-
2020
- 2020-12-25 CN CN202011557013.0A patent/CN112389486A/en active Pending
-
2021
- 2021-10-11 WO PCT/CN2021/123039 patent/WO2022134739A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022134739A1 (en) * | 2020-12-25 | 2022-06-30 | 中车戚墅堰机车有限公司 | Axle drive system lubricating and sealing structure |
| CN114439911A (en) * | 2022-01-28 | 2022-05-06 | 大连华锐重工集团股份有限公司 | Lubricating and sealing system of traveling driving speed reducer of large-axle-weight metallurgical vehicle |
| CN114439911B (en) * | 2022-01-28 | 2023-09-26 | 大连华锐重工集团股份有限公司 | Lubrication and sealing system of travelling drive speed reducer of large-axle-weight metallurgical vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022134739A1 (en) | 2022-06-30 |
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