CN203892532U - Movable sealing device for transmission shaft - Google Patents
Movable sealing device for transmission shaft Download PDFInfo
- Publication number
- CN203892532U CN203892532U CN201420151524.6U CN201420151524U CN203892532U CN 203892532 U CN203892532 U CN 203892532U CN 201420151524 U CN201420151524 U CN 201420151524U CN 203892532 U CN203892532 U CN 203892532U
- Authority
- CN
- China
- Prior art keywords
- oil
- transmission shaft
- sealing gland
- oil circuit
- bearing inner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a movable sealing device for a transmission shaft. During use, the transmission shaft drives a gear to operate, when lubricating oil enters from an oil inlet gap, one part of lubricating oil enters a first oil returning hole, and then oil returning is realized by an upper oil returning path; when the oil returning capacity of the first oil returning hole is not enough, part of the lubricating oil enters an oil path, then enters a lower oil returning oil path by a second oil returning hole to realize oil returning, shunt oil returning is realized, leakage of the lubricating oil caused by unsmooth oil returning of the lubrication oil is not caused, and a blowdown hole of a motor is prevented from leaking oil. The movable sealing device for the transmission shaft is reasonably designed, a check ring of a bearing inner ring is optimally designed and is press-fitted on the transmission shaft, and the oil inlet gap is formed between a sealing gland and a boss of the check ring of the bearing inner ring, so the height of the oil inlet gap is reduced, the oil inlet gap avoids a gear meshing boosting area, the lubricating oil, entering a driving end labyrinth of the motor from the oil inlet gap, of a gear is reduced furthest, and the oil leakage of the blowdown hole of the motor is avoided.
Description
Technical field
The utility model relates to transmission shaft dynamic sealing technology field, relates in particular to a kind of transmission shaft dynamic seal apparatus.
Background technique
The difference that engine truck drive unit lubricating structure is arranged causes engine truck driving device motor driving end sealing configuration varied, for the engine truck drive unit of motor-driven step bearing and driving gear independent lubricating, its traditional motor-driven end sealing configuration is simpler, and at the motor pollutant exhaust hole oil leakage phenomenon that exists in service of reality, along with the novel locomotive motor speed of subsequent design further improves, the motor pollutant exhaust hole oil leakage phenomenon that adopts traditional motor-driven end sealing configuration to cause is serious all the more.
Therefore, how providing a kind of transmission shaft dynamic seal apparatus, to avoid the leakage of oil of motor pollutant exhaust hole, is current those skilled in the art technical problems urgently to be resolved hurrily.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of transmission shaft dynamic seal apparatus, to avoid the leakage of oil of motor pollutant exhaust hole.
In order to achieve the above object, the utility model provides following technological scheme:
A kind of transmission shaft dynamic seal apparatus, comprise bearing inner race back-up ring, sealing gland and return tube, wherein, described bearing inner race retainer-ring press mounting is on transmission shaft, described bearing inner race back-up ring comprises boss, the outside of described boss flushes with the outside of described transmission shaft, described sealing gland and described boss form oil-feed gap, gear engagement anallobar is avoided in described oil-feed gap, the left side of described sealing gland and described bearing inner race back-up ring forms oil circuit, described oil-feed gap is communicated with described oil circuit, on described sealing gland, be respectively arranged with the first spill port and the second spill port, described return tube is divided into upper oil circuit and lower oil circuit by dividing plate, described the first spill port is communicated with described oil-feed gap with described upper oil circuit, described the second spill port is communicated with described oil circuit with described lower oil circuit.
Preferably, above-mentioned the first spill port comprises two U-shaped trough drainback passages of ladder, and described sealing gland and described bearing inner race back-up ring form labyrinth and described labyrinth is communicated with described the second spill port.
Preferably, the bottom of above-mentioned sealing gland contacts with gear-box eckband static seal, and the bottom of described return tube has bending part, and described bending part is dodged out the joint of described sealing gland and described gear-box eckband.
Preferably, above-mentioned return tube and described sealing gland are by being welded to connect.
The transmission shaft dynamic seal apparatus that the utility model provides, comprise bearing inner race back-up ring, sealing gland and return tube, wherein, described bearing inner race retainer-ring press mounting is on transmission shaft, described bearing inner race back-up ring comprises boss, the outside of described boss flushes with the outside of described transmission shaft, described sealing gland and described boss form oil-feed gap, gear engagement anallobar is avoided in described oil-feed gap, the left side of described sealing gland and described bearing inner race back-up ring forms oil circuit, described oil-feed gap is communicated with described oil circuit, on described sealing gland, be respectively arranged with the first spill port and the second spill port, described return tube is divided into upper oil circuit and lower oil circuit by dividing plate, described the first spill port is communicated with described oil-feed gap with described upper oil circuit, described the second spill port is communicated with described oil circuit with described lower oil circuit.
First, the running of transmission shaft driven gear, in the time having lubricant oil to enter from oil-feed gap, a part enters into the first spill port, then realizes oil return through upper oil circuit, when the first spill port oil return scarce capacity, parts of lubricating oil enters into oil circuit, then enters into lower oil circuit through the second spill port and realizes oil return, thereby realized shunting oil return, can be because lubricating oil return does not freely cause oil leak, thus the leakage of oil of motor pollutant exhaust hole avoided.
Secondly, by transmission shaft dynamic seal apparatus is reasonably designed, bearing inner race back-up ring is optimized to design, by bearing inner race retainer-ring press mounting on transmission shaft, between sealing gland and the boss of bearing inner race back-up ring, form oil-feed gap, the height in oil-feed gap is reduced, gear engagement anallobar is avoided in oil-feed gap, can reduce to greatest extent gear lubricant and scurry into motor-driven end labyrinth by oil-feed gap, thereby avoid the leakage of oil of motor pollutant exhaust hole.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The sectional structure schematic diagram of the transmission shaft dynamic seal apparatus that Fig. 1 provides for the utility model embodiment.
In upper Fig. 1:
Bearing inner race back-up ring 1, boss 11, transmission shaft 2, oil-feed gap 3, oil circuit 4, return tube 5, upper oil circuit 51, lower oil circuit 52, bending part 53, gear-box eckband 6, sealing gland 7, the first spill port 71, the second spill port 72, gear engagement nodel line 8, motor pollutant exhaust hole 9.
Embodiment
The utility model embodiment provides a kind of transmission shaft dynamic seal apparatus, to avoid the leakage of oil of motor pollutant exhaust hole.
For making the utility model embodiment's object, technological scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the sectional structure schematic diagram of the transmission shaft dynamic seal apparatus that Fig. 1 provides for the utility model embodiment.
The transmission shaft dynamic seal apparatus that the utility model embodiment provides, comprise bearing inner race back-up ring 1, sealing gland 7 and return tube 5, wherein, bearing inner race back-up ring 1 is fitted on transmission shaft 2, bearing inner race back-up ring 1 comprises boss 11, the outside of boss 11 flushes with the outside of transmission shaft 2, sealing gland 7 forms oil-feed gap 3 with boss 11, gear engagement anallobar is avoided in oil-feed gap 3, as more than 8 region of Fig. 1 middle gear engagement nodel line is engagement anallobar, sealing gland 7 forms oil circuit 4 with the left side of bearing inner race back-up ring 1, oil-feed gap 3 is communicated with oil circuit 4, on sealing gland 7, be respectively arranged with the first spill port 71 and the second spill port 72, return tube 5 is divided into upper oil circuit 51 and lower oil circuit 52 by dividing plate, the first spill port 71 is communicated with oil-feed gap 3 with upper oil circuit 51, the second spill port 72 is communicated with oil circuit 4 with lower oil circuit 52.
First, transmission shaft 2 driven gear runnings, in the time having lubricant oil to enter from oil-feed gap 3, a part enters into the first spill port 71, then realizes oil return through upper oil circuit 51, when the first spill port 71 oil return scarce capacity, parts of lubricating oil enters into oil circuit 4, then enters into lower oil circuit 52 through the second spill port 72 and realizes oil return, thereby realized shunting oil return, can be because lubricating oil return does not freely cause oil leak, thus 9 leakage of oils of motor pollutant exhaust hole avoided.
Secondly, by transmission shaft dynamic seal apparatus is reasonably designed, bearing inner race back-up ring 1 is optimized to design, bearing inner race back-up ring 1 is fitted on transmission shaft 2, between sealing gland 7 and the boss of bearing inner race back-up ring 1, form oil-feed gap 3, the height in oil-feed gap 3 is reduced, gear engagement anallobar is avoided in oil-feed gap 3, can reduce to greatest extent gear lubricant and scurry into motor-driven end labyrinth by oil-feed gap 3, thereby avoid the leakage of oil of motor pollutant exhaust hole.
Wherein, the first spill port 71 comprises two U-shaped trough drainback passages of ladder, can stop that more lubricant oil enters in oil circuit 4, sealing gland 7 and bearing inner race back-up ring 1 form labyrinth and labyrinth is communicated with the second spill port 72, can ensure that lubricant oil all refluxes, thereby avoid 9 leakage of oils of motor pollutant exhaust hole.
Wherein, the bottom of sealing gland 7 contacts with gear-box eckband 6 static seals, and the bottom of return tube 5 has bending part 53, and bending part 53 is dodged out the joint of sealing gland 7 and gear-box eckband 6.Return tube 5 bending designs avoid sealing gland 7 and the gluing in gear-box eckband 6 installation processes to stop up, and have feature easy to assembly.
Concrete, return tube 5 can be by being welded to connect with sealing gland 7, the good airproof performance of welding, and more firm, working life is longer.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to these embodiments' multiple amendment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a transmission shaft dynamic seal apparatus, is characterized in that, comprises bearing inner race back-up ring, sealing gland and return tube,
Wherein, described bearing inner race retainer-ring press mounting is on transmission shaft, described bearing inner race back-up ring comprises boss, the outside of described boss flushes with the outside of described transmission shaft, described sealing gland and described boss form oil-feed gap, and gear engagement anallobar is avoided in described oil-feed gap, and the left side of described sealing gland and described bearing inner race back-up ring forms oil circuit, described oil-feed gap is communicated with described oil circuit
On described sealing gland, be respectively arranged with the first spill port and the second spill port, described return tube is divided into upper oil circuit and lower oil circuit by dividing plate,
Described the first spill port is communicated with described oil-feed gap with described upper oil circuit, described the second spill port is communicated with described oil circuit with described lower oil circuit.
2. transmission shaft dynamic seal apparatus according to claim 1, it is characterized in that, described the first spill port comprises two U-shaped trough drainback passages of ladder, and described sealing gland and described bearing inner race back-up ring form labyrinth and described labyrinth is communicated with described the second spill port.
3. transmission shaft dynamic seal apparatus according to claim 1, it is characterized in that, the bottom of described sealing gland contacts with gear-box eckband static seal, and the bottom of described return tube has bending part, and described bending part is dodged out the joint of described sealing gland and described gear-box eckband.
4. transmission shaft dynamic seal apparatus according to claim 1, is characterized in that, described return tube and described sealing gland are by being welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151524.6U CN203892532U (en) | 2014-03-31 | 2014-03-31 | Movable sealing device for transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151524.6U CN203892532U (en) | 2014-03-31 | 2014-03-31 | Movable sealing device for transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892532U true CN203892532U (en) | 2014-10-22 |
Family
ID=51718940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151524.6U Withdrawn - After Issue CN203892532U (en) | 2014-03-31 | 2014-03-31 | Movable sealing device for transmission shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892532U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033579A (en) * | 2014-03-31 | 2014-09-10 | 南车株洲电力机车有限公司 | Transmission shaft sealing device |
| CN107420530A (en) * | 2017-09-27 | 2017-12-01 | 南京创力传动机械有限公司 | High power gearbox and severe duty drive |
-
2014
- 2014-03-31 CN CN201420151524.6U patent/CN203892532U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033579A (en) * | 2014-03-31 | 2014-09-10 | 南车株洲电力机车有限公司 | Transmission shaft sealing device |
| CN107420530A (en) * | 2017-09-27 | 2017-12-01 | 南京创力传动机械有限公司 | High power gearbox and severe duty drive |
| CN107420530B (en) * | 2017-09-27 | 2023-11-07 | 南京创力传动机械有限公司 | High-power gearbox and high-power transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20160615 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |