CN202228679U - Return-flow type seal casing of rotary shaft - Google Patents
Return-flow type seal casing of rotary shaft Download PDFInfo
- Publication number
- CN202228679U CN202228679U CN201120338063XU CN201120338063U CN202228679U CN 202228679 U CN202228679 U CN 202228679U CN 201120338063X U CN201120338063X U CN 201120338063XU CN 201120338063 U CN201120338063 U CN 201120338063U CN 202228679 U CN202228679 U CN 202228679U
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- running shaft
- return
- flow type
- wall
- type seal
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Abstract
The utility model discloses a return-flow type seal casing of a rotary shaft, which belongs to the field of seal parts of the rotary shaft and aims at solving the problems of easiness in effectiveness losing, unstable performance, difficulties in dismounting and the like in an existing rotary shaft seal. The return-flow type seal casing of the rotary shaft comprises a casing body, an annular inner oil retaining wall and an annular outer oil retaining wall are arranged on the casing body inner wall, and an annular flow guide groove arranged on the casing body inner wall is arranged between the inner oil retaining wall and the outer oil retaining wall. A radial return-flow hole communicated with the flow guide groove is radially arranged on the casing body inner wall, and an axial return-flow hole communicated with the radial return-flow hole is axially arranged in the casing body. The return-flow type seal casing of the rotary shaft integrates a contact type seal and a non-contact type seal to form a multi-stage independent closed seal, and residual fluid can automatically flow back. The return-flow type seal casing of the rotary shaft can prevent outside environment dust and the like from entering the device, has simple structure, long service life and low manufacture and using costs, and improves working efficiency.
Description
Technical field
The utility model relates to the rotation axis seal field of components, is specially a kind of running shaft return flow type seal casinghousing.
Background technique
The rotation axis seal housing is an indispensable important component part in the mechanical transmission, and all needs input or output the equipment of rotating power, and its running shaft all needs sealing for preventing that lubricant oil from leaking, like the input shaft and the output shaft of retarder, speed changer etc.The mode and the type of rotation axis seal are more, and common rotation axis seal mode has contact seal and noncontact seal, rotary shaft lip seal; Simple in structure because of it, good seal performance is widely used; But, be prone to agingly, rotten to cause the phenomenon of seal failure leakage pollution environment still to exist, and when changing Sealing because of its material is rubber, moulds and so on; Must dismantle the outer pipe fitting on the running shaft, consuming time taking a lot of work directly influences ordinary production.Especially the heave-load device under rugged environment, using, because of receiving the influence of environment, corrosion and other reason cause the external piece difficulty on the running shaft to dismantle maybe and can't dismantle, and bring inconvenience to plant maintenance.
In the rotation axis seal type, spiral sealing is because of receiving the restriction of rotation direction, and can not adapt to needs clockwise and anticlockwise to use Seal of Equipment, and centrifugal seal only is adapted to high-revolving rotary seal; Therefore, though the sealing means of these types all has its special performance advantage, also exist to make the unsatisfied defective of user.
Summary of the invention
In order to overcome the deficiency of easy inefficacy that existing rotation axis seal exists, unstable properties, dismounting difficulty etc.; The utility model aims to provide a kind of running shaft return flow type seal casinghousing, and this running shaft return flow type seal casinghousing is simple in structure, reliable performance; Long service life, wide accommodation.
To achieve these goals; The technological scheme that the utility model adopted is: said running shaft return flow type seal casinghousing comprises the shell body that is sleeved on the running shaft; Its structural feature is; Have the interior retaining You Bi of an annular and the oily wall of outer retaining of an annular on this shell inner body wall, keep off You Bi in this and keep off the annular diversion trench that is provided with out between the oily wall on the shell inner body wall outward; Radially have at least one return port radially that is communicated with said guiding gutter on the said shell inner body wall, axially have at least one the axial return port that is communicated with said radially return port in the said shell body.
By said structure, said in retaining You Bi identical with the preferred diameter of endoporus that keeps off outward oily wall, the oily wall of promptly said inside and outside retaining is identical with radial clearance between the running shaft, has guaranteed running shaft contactless needs that rotatablely move between seal casinghousing.Interior size of keeping off the You Bi and the diameter of bore of the oily wall of outer retaining adds use permission jerk value by the running shaft diameter and stays less than fluid lubrication oil viscosity gap and confirm.Thus; The oily wall of outer retaining blocks running shaft and axially leaks at the fluid lubrication oil reservoir of the moving bonding of transmission housing inward turning transhipment; Utilize the fluid lubrication oil viscosity, oily wall endoporus of retaining and rotation diameter of axle gap have constituted the first road close encapsulation structure less than fluid lubrication oil viscosity clearance channel in the sealing.
Said guiding gutter formation secondary seal sealing configuration between the oily wall of inside and outside retaining, and with in the residual fluid importing of the seepage guiding gutter between first order sealing and the second level sealing, warp is return port, axial return port returning transmission gear inner chamber radially.
The outside of the oily wall of said outer retaining is provided with out the felt groove on the shell inner body wall, and this felt groove has been embedded in felt.The said felt groove outside is provided with felt is fastened on the gland on the shell body.Said felt is preferably the dustproof felt of elongate body; Should embed in the said felt groove of open type by dustproof felt,, constituted the 3rd road close encapsulation that to prevent dust and can antiseepage by the gland location of being fixed in the housing outer end; When changing external sealed, again need not dismantle the outer pipe fitting on the running shaft.
Because the needs of processing technology, the radially return port of often on the shell body, opening is a through hole, and therefore, in order to prevent liquid from radially revealing return port and the auxiliary hole, the plug screw that is equipped with on the said shell body, an end of this plug screw are contained in radially in the return port.
The vertical lower horizontal plane of said guiding gutter is lower than the volume of bore edges in the outer retaining wall, greater than the volume of cavity between oily wall of interior retaining and the running shaft, confirms the diameter of bore and the groove width of guiding gutter with this.
The hole sectional area of said radially return port and axial return port is all long-pending greater than the radial cross section between interior retaining wall and the running shaft.
Said axial return port is aligned with the pod apertures of gear mechanism housing vertical lower through-lumen.
Because said running shaft return flow type seal casinghousing is contained on the gear mechanism housing; The pod apertures that connects the gear mechanism housing inner chamber on said axial return port and the gear mechanism housing is connected, and realizes backflow in the gear mechanism housing inner chamber so that oil gets into through pod apertures through axial return port.
Compared with prior art; The beneficial effect of the utility model is: the utility model integrates the advantage of contact seal and noncontact seal mode; Can not only constitute the multistage independent close encapsulation of multiple mode, and the residual physical efficiency refluxes automatically in transmission cavity; Can prevent effectively in the hybrid seal arrangement of external environment dust and other harmful substance entering; And it is simple in structure; Long service life, reliability is high, and manufacturing cost and use cost is low; Thoroughly solve the difficulty that to dismantle the outer pipe fitting on the running shaft when changing Sealing, improved working efficiency.
Below in conjunction with accompanying drawing and embodiment the utility model is done further to set forth.
Description of drawings
Fig. 1 is a kind of running shaft return flow type of the utility model seal casinghousing embodiment's a structure principle chart;
Fig. 2 is the A-A sectional view of Fig. 1.
In the drawings
The oily wall of retaining in the 1-; The oily wall of the outer retaining of 2-; The 3-guiding gutter; 4-felt groove;
5-is return port radially; The axial return port of 6-; The 7-leather packing; The 8-plug screw;
The 9-felt; The 10-gland; 11-shell body.
Embodiment
A kind of running shaft return flow type seal casinghousing, as illustrated in fig. 1 and 2, it by one be sleeved on monobloc container body 11 on the running shaft be processed in oily wall 1 endoporus of retaining; Oily wall 2 hearts of outer retaining, guiding gutter 3 is at the oily wall of inside and outside retaining 1, between 2, and open type felt groove is positioned at the outer end of the oily wall 2 of outer retaining; Radially return port 5 radially connects guiding gutter 3; Axially return port 6 is positioned inner and radially return port 5 perforations of running shaft return flow type seal casinghousing, and leather packing 7, plug screw 8 are assemblied in radially return port 5 outer ends, are used for stopping up the radially processing technology hole of return port 5; Dustproof felt 9 is that elongate body is in crook embeds open type felt groove 4; Gland 10 is radially positioned in open type felt groove 4 endoporus, compresses felt, is anchored on the outer end of running shaft return flow type seal casinghousing.
The diameter of bore of the oily wall 1,2 of said inside and outside retaining is preferably identical; Its aperture equals the running shaft diameter and adds running shaft rotation and allow jerk value to add less than fluid lubrication oil viscosity gap; Its principle is: the quantity of liquid lube layer that the external part rotation adheres in the running shaft is blocked in the oily wall of interior retaining 1 the inner; Utilize the clearance channel of fluid lubrication oil viscosity sealing less than the fluid lubrication oil viscosity; Promptly sealed the fluid lubrication oil reservoir that the running shaft motion adheres to, running shaft is turned round in the clearance space that not interfered by oily wall 1,2 endoporus of inside and outside retaining.
Said guiding gutter 3 is located at the oily wall of inside and outside retaining 1, between 2; Not only constitute two-stage retaining oil seal structure; And with in the remaining fluid lubricant oil lead-in groove through return port radially 5 and axial return port 6, flow back to the cabinets cavity oil sump automatically, guiding gutter 3 vertical lower horizontal planes are lower than the volume of bore edges in the oily wall 1,2 of inside and outside retaining; Must be greater than the cavity volume between oily wall 1 of interior retaining and the running shaft, and come to confirm the diameter and the groove width of guiding gutter 3 thus.
The radial cross section of said radially return port 5 and axial return port 6 is long-pending must be greater than the radial clearance sectional area between oily wall 1 of interior retaining and the running shaft, and axially the aperture of return port 6 aligns the pod apertures that outer end, gear mechanism housing below connects the gear mechanism housing inner chamber.
As shown in Figure 1, circumferentially have 6 attachment holes on the said shell body 11.
Its dust and other harmful substance that can block in the external environment of said dustproof felt 9 gets in the running shaft return flow type seal casinghousing; Can block the residual fluid of outside seepage again; Constituted the three seals of inner and outer sealing; When the sealing part abrasion inefficacy needs to change, untie gland 10 and change Sealing very easily, thoroughly solved the difficulty that must dismantle external piece on the running shaft when changing Sealing.
The content that the foregoing description is illustrated is to be understood that to these embodiments and only is used to be illustrated more clearly in the utility model; And be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.
Claims (8)
1. running shaft return flow type seal casinghousing; Comprise the shell body (11) that is sleeved on the running shaft; It is characterized in that; Have the oily wall of interior retaining (1) of an annular and the oily wall of outer retaining (2) of an annular on this shell body (11) inwall, be provided with out the annular diversion trench (3) on shell body (11) inwall between retaining oily wall (1) and the outer oily wall of retaining (2) in this; Radially have at least one return port (5) radially that is communicated with said guiding gutter (3) on said shell body (11) inwall, axially have at least one the axial return port (6) that is communicated with said radially return port (5) in the said shell body (11).
2. running shaft return flow type seal casinghousing according to claim 1 is characterized in that, the outside of the said outer oily wall of retaining (2) is provided with out the felt groove (4) on shell body (11) inwall, and this felt groove (4) has been embedded in felt (9).
3. running shaft return flow type seal casinghousing according to claim 1 is characterized in that, said felt groove (4) outside is provided with felt (9) is fastened on the gland (10) on the shell body (11).
4. running shaft return flow type seal casinghousing according to claim 1 is characterized in that, the plug screw (8) that prevents that liquid from revealing from return port (5) radially is housed on the said shell body (11), and an end of this plug screw (8) is contained in radially in the return port (5).
5. running shaft return flow type seal casinghousing according to claim 1 is characterized in that, said felt (9) is the dustproof felt (9) of elongate body, and this dustproof felt (9) embeds in the said felt groove (4) of open type.
6. according to the described running shaft return flow type of one of claim 1 ~ 5 seal casinghousing; It is characterized in that; The vertical lower horizontal plane of said guiding gutter (3) is lower than the volume of the interior bore edges of interior retaining wall (1), greater than the volume of cavity between oily wall of interior retaining (1) and the running shaft.
7. according to the described running shaft return flow type of one of claim 1 ~ 5 seal casinghousing, it is characterized in that the hole sectional area of said radially return port (5) and axial return port (6) is all long-pending greater than the radial cross section between interior retaining wall (1) and the running shaft.
8. according to the described running shaft return flow type of one of claim 1 ~ 5 seal casinghousing, it is characterized in that the pod apertures that connects the gear mechanism housing inner chamber on said axial return port (6) and the gear mechanism housing is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120338063XU CN202228679U (en) | 2011-09-09 | 2011-09-09 | Return-flow type seal casing of rotary shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120338063XU CN202228679U (en) | 2011-09-09 | 2011-09-09 | Return-flow type seal casing of rotary shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202228679U true CN202228679U (en) | 2012-05-23 |
Family
ID=46079265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120338063XU Expired - Fee Related CN202228679U (en) | 2011-09-09 | 2011-09-09 | Return-flow type seal casing of rotary shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202228679U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359594A (en) * | 2011-09-09 | 2012-02-22 | 湖南远扬煤机制造有限公司 | Rotating shaft backflow type seal housing |
| CN102425673A (en) * | 2011-12-09 | 2012-04-25 | 重庆潍柴发动机厂 | Oil collection ring for rotation shaft |
| CN105765276A (en) * | 2013-12-10 | 2016-07-13 | 日本精工株式会社 | Seal mechanism, drive device for seal mechanism, transport device, and manufacturing device |
-
2011
- 2011-09-09 CN CN201120338063XU patent/CN202228679U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359594A (en) * | 2011-09-09 | 2012-02-22 | 湖南远扬煤机制造有限公司 | Rotating shaft backflow type seal housing |
| CN102425673A (en) * | 2011-12-09 | 2012-04-25 | 重庆潍柴发动机厂 | Oil collection ring for rotation shaft |
| CN102425673B (en) * | 2011-12-09 | 2014-05-07 | 重庆潍柴发动机厂 | Oil collection ring for rotation shaft |
| CN105765276A (en) * | 2013-12-10 | 2016-07-13 | 日本精工株式会社 | Seal mechanism, drive device for seal mechanism, transport device, and manufacturing device |
| US10679875B2 (en) | 2013-12-10 | 2020-06-09 | Nsk Ltd. | Sealing mechanism comprising an annular sealing member and a lubricant groove storing a lubricant, a conveyance device, and a manufacturing device comprising a sealing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140909 |
|
| EXPY | Termination of patent right or utility model |