CN104819301A - Two-way grease seal for gearbox - Google Patents
Two-way grease seal for gearbox Download PDFInfo
- Publication number
- CN104819301A CN104819301A CN201510212163.0A CN201510212163A CN104819301A CN 104819301 A CN104819301 A CN 104819301A CN 201510212163 A CN201510212163 A CN 201510212163A CN 104819301 A CN104819301 A CN 104819301A
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- CN
- China
- Prior art keywords
- oil seal
- ptfe
- lip
- grease seal
- seal
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
Abstract
The invention relates to a two-way grease seal for a gearbox. The two-way grease seal comprises an outer grease seal and a PTFE (Polytetrafluoroethylene) SMD inner grease seal, wherein the outer grease seal is arranged outside the PTFE SMD inner grease seal; an outer grease seal sealing lip for sealing grease is arranged on the outer grease seal, and an inner grease seal sealing PTFE patch-type lip is arranged on the PTFE SMD inner grease seal and can prevent from dust and muddy water in a dry friction state and completely without oil lubrication. Through the PTFE patch-type lip, the frictional loss of an ordinary rubber lip can be effectively reduced in extremely harsh drying and high-temperature non-lubrication states, thereby preventing the grease oil from failure and improving the service life of the grease seal; by adopting a split combination structure, the disadvantages of various processes for processing the PTFE patch-type grease seals with complex structures can be effectively avoided, and the qualified rate of product production is improved.
Description
Technical field
The invention belongs to technical field of sealing technology, relate to a kind of Bidirectional oil seal used for gear box.
Background technique
At present, oil seal structure for gearbox is general as shown in Figure 1, this oil sealing comprises original interior sealing lip 11 and original outer seal lip 12, original interior sealing lip 11 is for sealing lubricating oil or lubricating grease, original outer seal lip 12 realizes anti-muddy water function, namely prevents introduced contaminants from entering in lubricant oil or lubricating grease.In real work, this oil sealing also exists following defect: first, and original outer seal lip 12 of oil sealing is in dry condition for a long time, and cause rubber lip frictional loss serious, oil sealing easily lost efficacy, and reduced the oil sealing life-span; In addition, due to the complex structure of this oil sealing, the reject produced in production processes such as its sulfidization molding and lip deburrings is more, and disqualification rate is higher.For this reason, need a kind of Bidirectional oil seal used for gear box, solve the problems referred to above existing in prior art, make it reduce rubber lip frictional loss, avoid oil seal failure, improve the oil sealing life-span, improve up-to-standard rate.
Summary of the invention
The object of the present invention is to provide a kind of Bidirectional oil seal used for gear box, solve the problems referred to above existing in prior art, make it reduce rubber lip frictional loss, avoid oil seal failure, improve the oil sealing life-span, improve up-to-standard rate.
For achieving the above object, the invention provides a kind of Bidirectional oil seal used for gear box, comprise outer oil seal and the SMD inner oil seal of PTFE, outer oil seal is arranged on the outside of the SMD inner oil seal of PTFE, outer oil seal is provided with the outer oil seal sealing lip realizing seal grease function, and the SMD inner oil seal of PTFE is provided with the SMD inner oil seal sealing lip of PTFE of dust-proof, the anti-muddy water function of the dry condition realizing complete oil-free lubrication.
In above scheme preferably, between the SMD inner oil seal of PTFE and outer oil seal be interference fit.
In above scheme preferably, the lip place of PTFE SMD inner oil seal sealing lip is provided with the PTFE paster of the dry condition realizing complete oil-free lubrication.
In above scheme preferably, the lip of outer oil seal is shaping by full-automatic otch.
In above scheme preferably, inner oil seal lip by the SMD sulfidization molding of PTFE and full-automatic otch shaping.
Compared with prior art, the present invention has the following advantages:
The invention provides a kind of Bidirectional oil seal used for gear box, first, this Bidirectional oil seal used for gear box is made up of outer oil seal and inner oil seal, Combined grease seal structure is utilized to replace existing monomer-type oil seal structure, make lip sulfidization molding and the otch deburring respectively of outer oil seal and inner oil seal, improve the production up-to-standard rate of oil sealing; Meanwhile, by arranging PTFE sheet at the lip of inner oil seal sealing lip, reducing the friction factor of inner oil seal seal lip, decreasing the frictional loss at lip place, extend the working life of oil sealing, and ensure that the sealing effect of oil sealing.It can solve problem existing in prior art, makes it reduce rubber lip frictional loss, avoids oil seal failure, improves the oil sealing life-span, improves up-to-standard rate.It adopts Combined grease seal structure, improves the production up-to-standard rate of oil sealing, extends the working life of oil sealing, simultaneously good sealing effect.
Accompanying drawing explanation
Fig. 1 is the half sectional view of Bidirectional oil seal used for gear box in prior art;
Fig. 2 is the half sectional view of Bidirectional oil seal used for gear box of the present invention.
In figure, 11 is original interior sealing lip, and 12 is original outer seal lip, and 1 is outer oil seal sealing lip, and 2 is PTFE sheet, and 3 is PTFE paster inner oil seal sealing lip, and 4 is the SMD inner oil seal of PTFE, and 5 is outer oil seal.
Embodiment
In order to understand the present invention better, below in conjunction with specific embodiment, the present invention is explained in detail.But, obviously can carry out different modification and remodeling to the present invention and not exceed the wider spirit and scope of the present invention of appended claims.Therefore, following examples have exemplary and hard-core implication.
Embodiment:
A kind of Bidirectional oil seal used for gear box, as shown in Figure 1, comprise outer oil seal 5 and the SMD inner oil seal 4 of PTFE, outer oil seal 5 is arranged on the outside of the SMD inner oil seal 4 of PTFE, outer oil seal 5 is provided with the SMD inner oil seal sealing lip 3 of PTFE that the SMD inner oil seal of outer oil seal sealing lip 1, PTFE 4 realizing seal grease function is provided with dust-proof, the anti-muddy water function of the dry condition realizing complete oil-free lubrication.
In the embodiment above, between the SMD inner oil seal 4 of PTFE and outer oil seal 5 be interference fit.The lip place of PTFE SMD inner oil seal sealing lip 3 is provided with the PTFE paster 2 of the dry condition realizing complete oil-free lubrication.The lip of outer oil seal 5 is shaping by full-automatic otch.The lip of inner oil seal 4 is by the SMD sulfidization molding of PTFE and automatically otch is shaping.
Bidirectional oil seal used for gear box of the present invention, it is Combined grease seal, and be namely made up of outer oil seal 5 and the SMD inner oil seal 4 of PTFE, outer oil seal 5 is arranged on the outside of the SMD inner oil seal 4 of PTFE, and in interference fit between the SMD inner oil seal 4 of PTFE and outer oil seal 5.Outer oil seal 5 comprises outer oil seal sealing lip 1, and outer oil seal sealing lip 1 serves the effect of sealing lubricating oil or lubricating grease; The SMD inner oil seal of PTFE 4 comprises the SMD inner oil seal sealing lip 3 of PTFE SMD inner oil seal sealing lip 3, PTFE and plays anti-muddy water effect, prevents introduced contaminants from entering in lubricant oil or lubricating grease.The lip place of the SMD inner oil seal sealing lip 3 of PTFE is provided with PTFE sheet 2, and now the lip of inner oil seal sealing lip is PTFE paster lip, reduces the friction factor of inner oil seal seal lip, decreases frictional loss, extends the working life of oil sealing.In addition, by this Combined grease seal structure, outer oil seal sealing lip 5 and sulfidization molding and the otch deburring respectively of the SMD inner oil seal sealing lip 3 of PTFE, improve the production up-to-standard rate of oil sealing.
Claims (5)
1. a Bidirectional oil seal used for gear box, comprise outer oil seal (5) and the SMD inner oil seal of PTFE (4), it is characterized in that: outer oil seal (5) is arranged on the outside of the SMD inner oil seal of PTFE (4), outer oil seal (5) is provided with the outer oil seal sealing lip (1) realizing seal grease function, and the SMD inner oil seal of PTFE (4) is provided with the SMD inner oil seal sealing lip (3) of PTFE of dust-proof, the anti-muddy water function of the dry condition realizing complete oil-free lubrication.
2. Bidirectional oil seal used for gear box as claimed in claim 1, is characterized in that: in interference fit between the SMD inner oil seal of PTFE (4) and outer oil seal (5).
3. Bidirectional oil seal used for gear box as claimed in claim 1, is characterized in that: the lip place of PTFE SMD inner oil seal sealing lip (3) is provided with the PTFE paster (2) of the dry condition realizing complete oil-free lubrication.
4. the Bidirectional oil seal used for gear box according to any one of claim 1-3, is characterized in that: the lip of outer oil seal (5) is shaping by full-automatic otch.
5. the Bidirectional oil seal used for gear box according to any one of claim 1-3, is characterized in that: the lip of inner oil seal (4) is by the SMD sulfidization molding of PTFE and automatically otch is shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212163.0A CN104819301A (en) | 2015-04-29 | 2015-04-29 | Two-way grease seal for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212163.0A CN104819301A (en) | 2015-04-29 | 2015-04-29 | Two-way grease seal for gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104819301A true CN104819301A (en) | 2015-08-05 |
Family
ID=53729700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510212163.0A Pending CN104819301A (en) | 2015-04-29 | 2015-04-29 | Two-way grease seal for gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104819301A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108474479A (en) * | 2016-01-13 | 2018-08-31 | Nok株式会社 | Sealing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2031269A2 (en) * | 2007-08-31 | 2009-03-04 | Carl Freudenberg KG | Sealing apparatus for reciprocrating shaft |
| CN201531603U (en) * | 2009-10-23 | 2010-07-21 | 青岛开世密封工业有限公司 | Multi-medium sealing |
| CN201992081U (en) * | 2011-03-23 | 2011-09-28 | 青岛开世密封工业有限公司 | Bidirectional oil seal used for gear box |
| CN202612645U (en) * | 2012-06-05 | 2012-12-19 | 青岛开世密封工业有限公司 | Bidirectional oil seal |
| CN203604656U (en) * | 2013-11-26 | 2014-05-21 | 青岛开世密封工业有限公司 | Back-to-back combined oil seal |
-
2015
- 2015-04-29 CN CN201510212163.0A patent/CN104819301A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2031269A2 (en) * | 2007-08-31 | 2009-03-04 | Carl Freudenberg KG | Sealing apparatus for reciprocrating shaft |
| CN201531603U (en) * | 2009-10-23 | 2010-07-21 | 青岛开世密封工业有限公司 | Multi-medium sealing |
| CN201992081U (en) * | 2011-03-23 | 2011-09-28 | 青岛开世密封工业有限公司 | Bidirectional oil seal used for gear box |
| CN202612645U (en) * | 2012-06-05 | 2012-12-19 | 青岛开世密封工业有限公司 | Bidirectional oil seal |
| CN203604656U (en) * | 2013-11-26 | 2014-05-21 | 青岛开世密封工业有限公司 | Back-to-back combined oil seal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108474479A (en) * | 2016-01-13 | 2018-08-31 | Nok株式会社 | Sealing device |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150805 |
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| RJ01 | Rejection of invention patent application after publication |