CN107834747B - Sealing structure of traction motor bearing - Google Patents
Sealing structure of traction motor bearing Download PDFInfo
- Publication number
- CN107834747B CN107834747B CN201711258400.2A CN201711258400A CN107834747B CN 107834747 B CN107834747 B CN 107834747B CN 201711258400 A CN201711258400 A CN 201711258400A CN 107834747 B CN107834747 B CN 107834747B
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- China
- Prior art keywords
- bearing
- annular
- labyrinth seal
- fluted disc
- rotating shaft
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention relates to a bearing sealing structure, in particular to a traction motor bearing sealing structure, which solves the problems that the pollutants in the existing bearing sealing structure easily enter the bearing, the lubricating grease is polluted, and the lubricating grease in the bearing is easily lost, and adopts the following scheme: an annular sealing groove is formed in the connecting surface of the rotor pressing plate and the end cover to form a fifth labyrinth seal; an annular groove is formed in an inner spigot of the end cover to form a fourth labyrinth seal with the rotating shaft; the inner circular surface of the bearing seat is provided with an annular flange which forms a third labyrinth seal with the rotating shaft; a toothed annular sealing groove is formed in the contact surface of the bearing pressing plate and the speed measuring fluted disc to form a second labyrinth seal; an annular check ring is arranged in the sensor mounting seat and forms a first labyrinth seal with the conical disc surface. The advantages are that: 1. the double-side labyrinth seal effectively prevents the lubricating grease from being polluted or lost; 2. the external pollution source is blocked, so that pollution is prevented; 3. the annular retainer ring prevents lubricating grease from polluting the sensor probe and guides the lubricating grease to flow back.
Description
Technical Field
The invention relates to a bearing sealing structure, in particular to a traction motor bearing sealing structure.
Background
The bearing is used as an important part of the traction motor and plays a role in supporting the rotation of the rotor, and according to the statistical analysis of the fault rate of the traction motor of the existing locomotive and motor car in China, the fault proportion of the bearing is the largest, and the bearing becomes the largest fault hidden trouble of the traction motor. The working environment of the traction motor bearing is very severe, and the bearing not only needs to bear the radial force and the axial force brought by the outside of the traction motor during working, but also needs to bear the vibration and high-temperature influence brought by the high-speed rotation of the traction motor. Therefore, the selection of the type, lubrication and sealing of the traction motor bearings determines the service life of the bearings. Present traction motor bearing seal structure is as shown in fig. 1, including pivot 1, 1 end of pivot is the echelonment, it has rotor clamp plate 2, bearing frame 4, bearing 5, the fluted disc 6 that tests the speed to overlap in proper order along the pivot axial in the pivot 1 from inside to outside on the pivot 1, the fluted disc 6 outer fringe cover that tests the speed has the bearing clamp plate 7 of terminal surface support on 5 outer lane terminal surfaces of bearing and bearing frame 4 terminal surfaces, it is equipped with along the equal outside toper quotation that extends of pivot 1 axial and radial on the fluted disc 6 that tests the speed to be equipped with on the bearing clamp plate 7, it tests the fluted disc enclosing cover 9 to be fixed with the speed that covers fluted disc 6 that tests the speed to cover on the bearing frame 4 and bearing clamp plate 7 and bearing 5 to open on the one side that corresponds has the oil storage chamber, the echelonment shoulder terminal surface department of bearing pivot 1 on the bearing frame 4 is provided with along the radial equipartition of pivot 1 a plurality Structurally, an air inlet end is arranged between the bearing seat 4 and the rotor pressing plate 2. Such a sealing structure has the following drawbacks: 1. cooling air enters from the air inlet end, tiny particles are inevitably mixed in the cooling air, and the stepped shaft shoulders of the bearing seat and the rotating shaft are in small clearance fit, so that although radial and axial labyrinth seal structures can filter some impurities, under the continuous action of air pressure of the air inlet end, tiny particles inevitably enter the bearing seat to pollute lubricating grease, bearing balls are damaged for a long time, and the service life of the bearing is shortened; 2. the adding amount of the lubricating grease is determined according to the size of the bearing and the volume of the cavity of the oil storage chamber, as shown in figure 1, a plurality of labyrinth structures between the inner circular surface of the bearing seat and the rotating shaft can effectively prevent the lubricating grease from flowing away from the side; however, the bearing pressing plate and the clearance fit of the outer circular surface of the speed measuring fluted disc form a labyrinth at the other side of the bearing, when the motor rotates at a high speed, the temperature of the bearing rises, the viscosity of lubricating grease is reduced, the lubricating grease can overflow from the clearance, and in addition, the high-speed rotation of the speed measuring fluted disc causes the lubricating grease to be thrown onto the inner side end surface of the outer cover along the conical disc surface of the speed measuring fluted disc, so that the lubricating grease of the bearing is continuously lost, the cooling effect of the bearing is deteriorated, and meanwhile, a probe of the speed sensor can be.
Therefore, it is necessary to design a bearing sealing structure capable of blocking external contaminants from entering the bearing and preventing grease from running off.
Disclosure of Invention
The invention solves the problems that pollutants in the conventional bearing sealing structure easily enter the bearing, the lubricating grease is polluted, and the internal lubricating grease is easily lost, and provides the traction motor bearing sealing structure.
The invention is realized by the following technical scheme: the traction motor bearing sealing structure comprises a rotating shaft, wherein the end head of the rotating shaft is in a step shape, a rotor pressing plate, an end cover, a bearing seat, a bearing and a speed measuring fluted disc are sequentially sleeved on the rotating shaft from inside to outside along the axial direction of the rotating shaft, the end surface of the speed measuring fluted disc is sleeved with the bearing pressing plate, the end surface of the speed measuring fluted disc is supported on the end surface of an outer ring of the bearing and the end surface of the bearing seat, a conical disc surface which extends outwards along the axial direction and the radial direction of the rotating shaft is arranged on the end surface of one side of; tooth-shaped annular sealing grooves with rectangular cross sections are formed in the connection surfaces of the rotor pressing plate and the end covers, and the tooth-shaped annular sealing grooves are matched with each other to form a fifth labyrinth sealing structure; a plurality of annular grooves are formed in the matching surface of the inner spigot surface of the end cover and the outer circumference of the second-stage stepped shaft shoulder part of the rotating shaft, and a fourth labyrinth sealing structure is formed between the annular grooves and the matching surface of the outer circumference of the rotating shaft; an annular flange facing the first-stage stepped shaft shoulder of the rotating shaft is arranged on the inner circumferential surface of the bearing seat, and a gap is reserved on one surface of the annular flange opposite to the shaft shoulder of the rotating shaft to form a third labyrinth seal structure; the bearing comprises a bearing outer ring, an annular flange, a bearing pressing plate, a bearing outer ring, a bearing inner ring, a bearing outer ring, a bearing pressure plate and a bearing, wherein the annular flange is provided with a step supported on the bearing outer ring on one side opposite to the bearing; a plurality of toothed annular sealing grooves with saw-shaped cross sections are arranged on the contact surface of the bearing pressing plate and the speed measuring fluted disc, and the toothed annular sealing grooves are matched with each other to form a second labyrinth sealing structure; the sensor mounting seat is internally provided with an annular check ring facing the conical disc surface of the speed measuring fluted disc, and the annular check ring is in clearance fit with the conical disc surface of the speed measuring fluted disc to form a first labyrinth seal structure. The rotor pressing plate and the end cover are connected with a face which is provided with a dentate annular sealing groove, and the sealing groove is internally coated with lubricating grease, so that the sealing effect can be achieved, and cooling air is prevented from entering the interior of the bearing from the space between the end cover and the rotor pressing plate to pollute the bearing and the lubricating grease. The end cover inner spigot is provided with an annular groove which is in clearance fit with the step surface of the rotating shaft to form a fourth labyrinth seal structure, the bearing seat is provided with an annular flange which leaves a clearance with the shaft shoulder of the rotating shaft to form a third labyrinth seal structure which seals the right side of the bearing together to prevent lubricating liquid from running off, and the fifth seal structure isolates external pollution to protect lubricating grease in the right side seal structure from being polluted. Annular sealing grooves which are matched with each other are arranged between the speed measuring fluted disc and the bearing pressing plate to form a second labyrinth sealing structure, an annular retainer ring which is in clearance fit with the conical disc surface is arranged in the sensor mounting seat to form a first labyrinth sealing structure, and the two labyrinth sealing structures jointly protect lubricating grease on the left side of the bearing; because the motor is vibrations when the operation, the drunkenness can take place for the pivot, even if when second labyrinth seal structure became invalid, lubricating grease can be stopped in conical disk face bottom, along with the rotation of the fluted disc that tests the speed, lubricating grease is blockked by the inboard annular retaining ring of sensor mount pad after climbing along the inclined plane, and then gets back to in the second labyrinth seal structure along the inclined plane, plays the effect that prevents lubricating grease loss, still can further prevent lubricating grease pollution sensor probe, the output of signal that the influence tests the speed.
The invention has the following advantages: 1. the double-side labyrinth seal structure can effectively prevent the lubricating grease from being polluted or lost; 2. blocking an external pollution source to prevent pollutants from entering a bearing sealing structure; 3. an annular retainer ring is arranged in the sensor mounting seat, so that lubricating grease is prevented from polluting the sensor probe, and is guided to flow back into the labyrinth seal structure.
Drawings
FIG. 1 is a schematic view of a prior art labyrinth seal structure;
FIG. 2 is a schematic structural view of the present invention;
in the figure: the method comprises the following steps of 1-rotating shaft, 2-rotor pressing plate, 3-end cover, 4-bearing seat, 5-bearing, 6-speed measuring fluted disc, 7-bearing pressing plate, 8-sensor mounting seat, 9-speed measuring fluted disc outer cover, 10-fifth labyrinth seal structure, 11-fourth labyrinth seal structure, 12-third labyrinth seal structure, 13-second labyrinth seal structure and 14-first labyrinth seal structure.
Detailed Description
The traction motor bearing sealing structure comprises a rotating shaft 1, wherein the end of the rotating shaft 1 is in a step shape, a rotor pressing plate 2, an end cover 3, a bearing seat 4, a bearing 5 and a speed measuring fluted disc 6 are sequentially sleeved on the rotating shaft 1 from inside to outside along the axial direction of the rotating shaft 1, a bearing pressing plate 7 is sleeved on the outer edge of the speed measuring fluted disc 6, the end faces of the speed measuring fluted disc 6 are supported on the end face of the outer ring of the bearing 5 and the end face of the bearing seat 4, a conical disc face which extends outwards along the axial direction and the radial direction of the rotating shaft 1 is arranged on the end face of one side of the speed measuring fluted; tooth-shaped annular sealing grooves with rectangular cross sections are arranged on the connection surfaces of the rotor pressing plate 2 and the end covers 3, and the tooth-shaped annular sealing grooves are matched with each other to form a fifth labyrinth sealing structure 10; a plurality of annular grooves are formed in the matching surface of the inner spigot surface of the end cover 3 and the outer circumference of the second-stage stepped shaft shoulder part of the rotating shaft 1, and a fourth labyrinth seal structure 11 is formed between the annular grooves and the matching surface of the outer circumference of the rotating shaft 1; an annular flange facing a first-stage stepped shaft shoulder part of the rotating shaft 1 is arranged on the inner circumferential surface of the bearing seat 4, and a gap is reserved on one surface of the annular flange opposite to the shaft shoulder of the rotating shaft 1 to form a third labyrinth seal structure 12; a step supported on the outer ring of the bearing 5 is arranged on one surface of the annular flange opposite to the bearing 5, a bearing right-side oil storage chamber is formed between the annular flange and the bearing 5, an annular groove is formed in the end surface of one side, opposite to the bearing 5, of the bearing pressing plate 7, the outer side of the annular groove is supported on the outer ring of the bearing 5, and a bearing left-side oil storage chamber is formed between the annular groove and the bearing 5; a plurality of toothed annular sealing grooves with saw-shaped cross sections are arranged on the contact surface of the bearing pressing plate 7 and the speed measuring fluted disc 6, and the toothed annular sealing grooves are matched with each other to form a second labyrinth sealing structure 13; an annular check ring facing the conical disc surface of the speed measuring fluted disc 6 is arranged in the sensor mounting seat 8, and the annular check ring is in clearance fit with the conical disc surface of the speed measuring fluted disc 6 to form a first labyrinth seal structure 14.
Claims (1)
1. The utility model provides a traction motor bearing seal structure, includes pivot (1), pivot (1) end is the echelonment, from inside to outside in pivot (1) along pivot (1) axial in proper order the cover have rotor clamp plate (2), end cover (3), bearing frame (4), bearing (5), the fluted disc (6) tests the speed, it has bearing clamp plate (7) that the terminal surface supported on bearing (5) outer lane terminal surface and bearing frame (4) terminal surface to test the speed fluted disc (6) outer fringe cover, it is equipped with along pivot (1) axial and the radial equal conical disk face that outwards extends to test the speed on the side end face of fluted disc (6) orientation pivot (1), be fixed with sensor mount pad (8) and test the fluted disc enclosing cover (9), its characterized in that on end cover (3): a first toothed annular sealing groove with a rectangular cross section is formed in the connecting surface of the rotor pressing plate (2) and the end cover (3), and the first toothed annular sealing grooves are matched with each other to form a fifth labyrinth sealing structure (10); a plurality of annular grooves are formed in the matching surface of the inner spigot surface of the end cover (3) and the outer circumference of the second-stage stepped shaft shoulder of the rotating shaft (1), and a fourth labyrinth seal structure (11) is formed between the annular grooves and the outer circumference matching surface of the rotating shaft (1); an annular flange facing a first-stage stepped shaft shoulder part of the rotating shaft (1) is arranged on the inner circumferential surface of the bearing seat (4), and a gap is reserved on one surface of the annular flange opposite to the shaft shoulder of the rotating shaft (1) to form a third labyrinth seal structure (12); a step supported on an outer ring of the bearing (5) is arranged on one surface of the annular flange opposite to the bearing (5), a bearing right-side oil storage chamber is formed between the annular flange and the bearing (5), an annular groove is formed in the end face of one side, opposite to the bearing (5), of the bearing pressure plate (7), the outer side of the annular groove is supported on the outer ring of the bearing (5), and a bearing left-side oil storage chamber is formed between the annular groove and the bearing (5); a plurality of second toothed annular sealing grooves with rectangular cross sections are arranged on the contact surface of the bearing pressing plate (7) and the speed measuring fluted disc (6), and the second toothed annular sealing grooves are matched with each other to form a second labyrinth sealing structure (13); an annular check ring facing the conical disc surface of the speed measuring fluted disc (6) is arranged in the sensor mounting seat (8), and the annular check ring is in clearance fit with the conical disc surface of the speed measuring fluted disc (6) to form a first labyrinth seal structure (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258400.2A CN107834747B (en) | 2017-12-04 | 2017-12-04 | Sealing structure of traction motor bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711258400.2A CN107834747B (en) | 2017-12-04 | 2017-12-04 | Sealing structure of traction motor bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107834747A CN107834747A (en) | 2018-03-23 |
| CN107834747B true CN107834747B (en) | 2019-12-20 |
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ID=61641167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711258400.2A Active CN107834747B (en) | 2017-12-04 | 2017-12-04 | Sealing structure of traction motor bearing |
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| Country | Link |
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| CN (1) | CN107834747B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823036B (en) * | 2021-01-21 | 2023-09-12 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Superconductive magnet heat insulation supporting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201409033Y (en) * | 2009-04-01 | 2010-02-17 | 美的集团有限公司 | Fixing and sealing device for rolling bearing of large motor |
| CN103441632A (en) * | 2013-09-11 | 2013-12-11 | 永济新时速电机电器有限责任公司 | High-power asynchronous traction motor for alternating-current transmission rapid passenger transportation electric locomotive |
| CN104810983A (en) * | 2015-05-19 | 2015-07-29 | 永济新时速电机电器有限责任公司 | High-power traction motor of high speed motor train unit |
| CN105020272A (en) * | 2015-08-25 | 2015-11-04 | 南车成都机车车辆有限公司 | Oil stop cover of locomotive and oil stopping method of oil seal system of traction motor of locomotive |
-
2017
- 2017-12-04 CN CN201711258400.2A patent/CN107834747B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201409033Y (en) * | 2009-04-01 | 2010-02-17 | 美的集团有限公司 | Fixing and sealing device for rolling bearing of large motor |
| CN103441632A (en) * | 2013-09-11 | 2013-12-11 | 永济新时速电机电器有限责任公司 | High-power asynchronous traction motor for alternating-current transmission rapid passenger transportation electric locomotive |
| CN104810983A (en) * | 2015-05-19 | 2015-07-29 | 永济新时速电机电器有限责任公司 | High-power traction motor of high speed motor train unit |
| CN105020272A (en) * | 2015-08-25 | 2015-11-04 | 南车成都机车车辆有限公司 | Oil stop cover of locomotive and oil stopping method of oil seal system of traction motor of locomotive |
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| Publication number | Publication date |
|---|---|
| CN107834747A (en) | 2018-03-23 |
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