CN203770200U - Non-contact type seal structure of bearing box - Google Patents
Non-contact type seal structure of bearing box Download PDFInfo
- Publication number
- CN203770200U CN203770200U CN201420092105.XU CN201420092105U CN203770200U CN 203770200 U CN203770200 U CN 203770200U CN 201420092105 U CN201420092105 U CN 201420092105U CN 203770200 U CN203770200 U CN 203770200U
- Authority
- CN
- China
- Prior art keywords
- bearing
- bearing box
- bearing housing
- oil
- disc
- 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.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Abstract
The utility model relates to a non-contact type seal structure of a bearing box. The seal structure comprises a bearing box body, a bearing box end cover and a transmission shaft arranged on the bearing box in a penetrating manner, and is supported by a bearing arranged in the bearing box body, wherein an oil slinger is arranged between the bearing and the bearing box end cover; an inner ring of the oil slinger is in close interference fit with the transmission shaft; an outer ring of the oil slinger freely rotates in the axial direction; the oil slinger is not in contact with the bearing and the bearing box end cover; the height of an oil level line in the bearing box body is not more than 5 mm. According to the seal structure, oil cannot leak when the bearing box is in a working state and the oil level is at any height and when the bearing box is in a static state and the oil level is near the defined oil level line.
Description
Technical field
The utility model relates to a kind of non-contacting sealing structure, particularly a kind of non-contacting sealing structure for solid box case.
Background technique
The critical piece of large fan bearing housing is bearing housing body, be arranged at the intrinsic bearing of bearing housing, transmission shaft and bearing box end cap, bearing lubricated mainly contains oil mist lubrication or utilizes disc or disc has got rid of lubricant oil, ensures the normal work of bearing by various paths.
Chinese large-sized Fan Bearing Box is comparatively general along the phenomenon of transmission shaft leakage of oil a few days ago.Although have unit to adopt once the measures such as oil immersion wool felt, asbestos packing and flexible graphite sealing ring in stuffing box packing, all do not receive and significantly control leakage effect.And need dismantle all revolution parts beyond oil sealing while changing, this is unapproachable at large fan scene.
Be necessary to provide a kind of reliable Seal in Bearing Box structure.
Model utility content
Technical problem to be solved in the utility model is: a kind of bearing housing non-contacting sealing structure is provided, plays the object that the oil in bearing housing is not revealed vertically in the process of running.
For solving the problems of the technologies described above, the utility model provides a kind of following proposal: a kind of bearing housing non-contacting sealing structure, comprise bearing housing body, bearing box end cap, be arranged in the transmission shaft on bearing housing, by being located at the intrinsic bearings of bearing housing, wherein, between described bearing and described bearing box end cap, be provided with disc, the inner ring of described disc and transmission shaft interference close-fitting, axially freely rotate the outer ring of disc, described disc does not contact with bearing box end cap with bearing, overall Immersion Depth in bearing housing body (also claiming oil level line height) is not more than 5mm.In the utility model, due to described disc with bearing housing body is not interfered, the inner wall of oil tank of contact bearing case not, when rotation, can not be subject to other external force.Described disc is with in transmission shaft rotation process, because the effect of centrifugal force is outwards thrown to bearing ball the inside oil, play the effect of lubricating bearings, and the disc rotating produces negative pressure, air-flow is from disc inner ring to disc outer ring, thereby reach double action lubricated and sealing, finally play the technique effect that the oil in bearing housing is not revealed vertically in the process of running.
On such scheme basis, described oil level line height is 3～5mm.
On such scheme basis, described disc is quality of rubber materials.
For proving sealing effect of the present utility model, carry out following experiment:
(1) static test:
Refuel near oil level center line in bearing housing inside, under static state without leakage of oil.
(2) dynamic test:
Under bearing housing static state, refuel to main shaft position, lubricant oil can flow out automatically.
(A) start power supply, rotating speed frequency conversion is 4500 to turn, and transmission shaft continues 10min in rotary course, vertically without leakage.
(B) rotating speed turns and is reduced to 4000 and turns by 4500, and--->3500 turns, and--->3000 turns, and--->2000 turns, and--->1000 turns, and---8 operating modes such as >250 turns that >800 turns--->500 turns---, each operating mode continuous running 5min is without leakage.
(C) shut down after 10s, oil can flow out automatically.
Superiority of the present utility model is:
(A), in bearing housing working state, oil level can not leak under arbitrary height.
(B), under bearing housing static state, oil level can not leak near the oil level line of regulation.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is disc schematic diagram;
Attached number in the figure explanation:
1---bearing box end cap; 2---bearing;
3---bearing housing body;
4---disc; 41---inner ring; 42---outer ring;
5---transmission shaft; 6---oil level line.
Embodiment
Below by Figure of description, the utility model is further described.
Referring to structural representation as of the present utility model in accompanying drawing 1 and Fig. 2 is disc schematic diagram, a kind of bearing housing non-contacting sealing structure, comprise bearing housing body 3, bearing box end cap 1, be arranged in the transmission shaft 5 on bearing housing, support by being located at the intrinsic bearing 2 of bearing housing, wherein, between described bearing 2 and described bearing box end cap 1, be provided with disc 4, the inner ring 41 of described disc 4 and transmission shaft 5 interference close-fittings, axially freely rotate the outer ring 42 of disc 4, described disc 4 does not contact with bearing box end cap 1 with bearing 2, be 3～5mm at the intrinsic oil level line of bearing housing.Described disc 4 and bearing housing body 3 do not interfere, the inner wall of oil tank of contact bearing case not, is not subject to other external force when rotation.
Described disc is quality of rubber materials.
Principle is: seal action is that centrifugal principle and the principle of negative pressure of following transmission shaft 5 rotation processes according to disc 4 carry out work, thereby reaches effect lubricated and sealing, finally plays the object that the oil in bearing housing is not revealed vertically in the process of running.Described centrifugal principle, oil level line 6 is at 3～5mm(as shown in FIG.), described disc 4, with in bearing housing transmission shaft 5 rotation processes, because the effect of rotating centrifugal force is outwards thrown to bearing ball the inside oil, plays lubrication; Described principle of negative pressure, disc 4 produces negative pressure as an impeller in crossing of running claims, the outer ring 42 of air-flow from the inner ring 41 of disc 4 to disc 4.
Claims (3)
1. a bearing housing non-contacting sealing structure, comprise bearing housing body, bearing box end cap, be arranged in the transmission shaft on bearing housing, by being located at the intrinsic bearings of bearing housing, it is characterized in that, between described bearing and described bearing box end cap, be provided with disc, the inner ring of described disc and transmission shaft interference close-fitting, axially freely rotate the outer ring of disc, described disc does not contact with bearing box end cap with bearing, and in bearing housing body, oil level line is not higher than 5mm.
2. bearing housing non-contacting sealing structure according to claim 1, is characterized in that: described oil level line is 3～5mm.
3. bearing housing non-contacting sealing structure according to claim 1, is characterized in that: described disc is quality of rubber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420092105.XU CN203770200U (en) | 2014-02-28 | 2014-02-28 | Non-contact type seal structure of bearing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420092105.XU CN203770200U (en) | 2014-02-28 | 2014-02-28 | Non-contact type seal structure of bearing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770200U true CN203770200U (en) | 2014-08-13 |
Family
ID=51287396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420092105.XU Expired - Fee Related CN203770200U (en) | 2014-02-28 | 2014-02-28 | Non-contact type seal structure of bearing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063575A (en) * | 2017-03-17 | 2017-08-18 | 合肥通用机械研究院 | A kind of high deceleration device shaft end seal experimental rig |
-
2014
- 2014-02-28 CN CN201420092105.XU patent/CN203770200U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063575A (en) * | 2017-03-17 | 2017-08-18 | 合肥通用机械研究院 | A kind of high deceleration device shaft end seal experimental rig |
| CN107063575B (en) * | 2017-03-17 | 2019-04-09 | 合肥通用机械研究院有限公司 | A kind of high deceleration device shaft end seal experimental rig |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201821 Shanghai City, Zhangpu Jiading District Juyuan Industrial Development Zone, Road No. 155 Patentee after: Yingfei Tongren fan Co.,Ltd. Address before: 201821 Shanghai City, Zhangpu Jiading District Juyuan Industrial Development Zone, Road No. 155 Patentee before: SHANGHAI NAUTILUS GENERAL EQUIPMENT MANUFACTURING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |