CN104653784A - High-speed oil sealing structure - Google Patents
High-speed oil sealing structure Download PDFInfo
- Publication number
- CN104653784A CN104653784A CN201510039631.9A CN201510039631A CN104653784A CN 104653784 A CN104653784 A CN 104653784A CN 201510039631 A CN201510039631 A CN 201510039631A CN 104653784 A CN104653784 A CN 104653784A
- Authority
- CN
- China
- Prior art keywords
- lip
- sealing lip
- secondary sealing
- base
- primary 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention discloses a high-speed oil sealing structure, which comprises an annular base and a pressing ring arranged in the base, wherein the outer edge of the base forms a radially extending retaining edge; an auxiliary sealing lip, an elastic washer and a main sealing lip are sequentially arranged on the inner side of the retaining edge on the base from outside to inside; the outer edge of the pressing ring forms a radially extending pressing edge capable of pressing the auxiliary sealing lip, the elastic washer and the main sealing lip; each of the main and auxiliary sealing lips forms a crimped lip opening which extends to the outer side of a confined space and can be matched with a rotating shaft; the confined space is formed between the main and auxiliary sealing lips and the rotating shaft; spiral grooves of which the pitches are gradually reduced during transition to the crimped lip openings are formed in the inner surfaces, in the confined space, of the main and auxiliary sealing lips. According to the high-speed oil sealing structure, by the pitch-variable spiral grooves, the confined space can be kept under normal pressure, the poor influence of a pumping effect on the main and auxiliary sealing lips is avoided, and the service life of a product is prolonged; the high-speed oil sealing structure is simple, accurate in axial positioning and convenient to mount, and has good radiation effects.
Description
Technical field
The present invention is used for Sealing technical field, particularly relates to a kind of high-speed oil seal structure.
Background technique
As shown in Figure 1, existing high-speed oil seal structure, generally comprises purchasing ore, inner frame, primary seal lip, secondary sealing lip and elastic washer composition.Major and minor sealing lip PTFE packing material is made, the material of elastic washer generally uses General Purpose Rubber, main PTFE sealing lip, secondary sealing lip and elastic washer is followed successively by between purchasing ore and inner frame, then the exterior edge face of purchasing ore flange compacting inner frame is used, prevent sealing medium from seepage between each assembly, become final high-speed oil seal product.
The high-speed oil seal of this class formations all, there is following problem: the inwall of the major and minor sealing lip of a. is all with reverse oil-return groove, in the confined space formed between major and minor sealing lip and running shaft, because effect inhaled by the pump of major and minor sealing lip oil-return groove, the gas of confined space is discharged with sealing medium, negative pressure is formed in confined space, major and minor seal lip is out of shape because pressure reduction increases, thus the enclasping force added between major and minor seal lip and running shaft, lip temperature is raised, even may cause lip varus or tear, causing seal failure.B., when major and minor sealing lip cannot normally seal due to wearing and tearing or other reason, product can only be scrapped.C. secondary sealing lip is due to little with the area of contact of purchasing ore, and heat radiation is slow.
Summary of the invention
For solving the problem, the invention provides a kind of high-speed oil seal structure, the confined space of primary seal lip, secondary sealing lip composition can keep normal pressure, and the harmful effect avoiding pump suction effect to bring primary seal lip, secondary sealing lip, improves the working life of product.
The technical solution adopted for the present invention to solve the technical problems is: the base comprising annular and the hold-down ring be contained in described base, the outer rim of described base forms the gear edge extended radially, described base is equipped with secondary sealing lip successively at the inner side ecto-entad on gear edge, elastic washer and primary seal lip, the outer rim of described hold-down ring is formed and extends radially and can compress described secondary sealing lip, the pressure edge of elastic washer and primary seal lip, described primary seal lip and secondary sealing lip are all formed and stretch out and the crimping lip that can coordinate with running shaft outside described confined space, described primary seal lip, confined space is formed between secondary sealing lip and running shaft, described primary seal lip and the secondary sealing lip spiral grooves that pitch reduces gradually when the internal surface of confined space is equipped with excessive to crimping lip.
Be further used as the improvement of technical solution of the present invention, be threaded connection between described base and hold-down ring, the thread surface between described base and hold-down ring scribbles sealer.
Be further used as the improvement of technical solution of the present invention, the periphery of described primary seal lip, secondary sealing lip and elastic washer all with the contact internal walls of base.
Be further used as the improvement of technical solution of the present invention, described primary seal lip and secondary sealing lip are the PTFE product of mold pressing, and described elastic washer is rubber part, and described base is stainless steel product, and described hold-down ring is stainless steel or carbon structure Steel Work.
Be further used as the improvement of technical solution of the present invention, the cross section of described spiral grooves is triangle or rectangle or circular arc.
Beneficial effect of the present invention: when this high-speed oil seal structure uses, loading oil sealing by base installs in cavity, running shaft passes the crimping lip of primary seal lip and secondary sealing lip, primary seal lip, between secondary sealing lip and running shaft, form confined space, the internal surface of primary seal lip, secondary sealing lip is all with spiral grooves, because effect inhaled by the pump of spiral grooves, rotate with running shaft a small amount of sealing medium bringing confined space into and be brought back into sealing medium chamber gradually, form hydrldynamic pressure lubrication.Because spiral grooves is pitches formula structure, pitch near crimping lip place is less, pitch away from crimping lip place is comparatively large, and the gas in cavity can not be taken out of with sealing medium, and primary seal lip, secondary sealing lip and running shaft form enclosed space and remain atmospheric pressure state.The harmful effect avoiding pump suction effect to bring primary seal lip, secondary sealing lip, improves the working life of product.Structure of the present invention is simple, and axially locating is accurate, easy for installation, the good heat dissipation effect of oil sealing.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is existing high-speed oil seal structural representation;
Fig. 2 is embodiment of the present invention structural representation;
Fig. 3 is embodiment of the present invention primary seal lip schematic enlarged-scale view.
Embodiment
With reference to Fig. 2, Fig. 3, the invention provides a kind of high-speed oil seal structure, the base 1 comprising annular and the hold-down ring 2 be contained in described base 1, the outer rim of described base 1 forms the gear that extends radially along 11, on described base 1 gear along 11 inner side ecto-entad secondary sealing lip 3, elastic washer 4 and primary seal lip 5 are housed successively, described primary seal lip 5 and secondary sealing lip 3 are the PTFE product of mold pressing, described elastic washer 4 is rubber part, described base 1 is stainless steel product, and described hold-down ring 2 is stainless steel or carbon structure Steel Work.The outer rim of described hold-down ring 2 formed extend radially and the pressure that can compress described secondary sealing lip 3, elastic washer 4 and primary seal lip 5 along 21, described primary seal lip 5 and secondary sealing lip 3 are all formed and stretch out and the crimping lip 71 that can coordinate with running shaft 7 outside described confined space 6, described primary seal lip 5, between secondary sealing lip 3 and running shaft 7, form confined space 6, described primary seal lip 5 and secondary sealing lip 3 the internal surface of confined space 6 be equipped with to crimping lip 71 excessively time the pitch spiral grooves 8 that reduces gradually.The cross section of described spiral grooves 8 is triangle or rectangle or circular arc.
When this high-speed oil seal structure uses, loading oil sealing by base 1 installs in cavity 9, running shaft 7 passes the crimping lip 71 of primary seal lip 5 and secondary sealing lip 3, primary seal lip 5, between secondary sealing lip 3 and running shaft 7, form confined space 6, the internal surface of primary seal lip 5, secondary sealing lip 3 is all with spiral grooves 8, because effect inhaled by the pump of spiral grooves 8, rotate with running shaft 7 the 6 a small amount of sealing mediums bringing confined space into and be brought back into sealing medium chamber 10 gradually, form hydrldynamic pressure lubrication.Because spiral grooves 8 is pitches formula structure, pitch near crimping lip 71 place is less, pitch away from crimping lip 71 place is larger, gas in cavity can not be taken out of with sealing medium, secondary sealing lip 3 is dust-proof use, and the medium of both sides is air, and pressure is the same, therefore there is not the loss of medium, primary seal lip 5 like this, secondary sealing lip 3 form enclosed space 6 with running shaft 7 and remain atmospheric pressure state.The harmful effect avoiding pump suction effect to bring primary seal lip 5, secondary sealing lip 3, improves the working life of product.
Be threaded connection between described base 1 and hold-down ring 2, the thread surface between described base 1 and hold-down ring 2 scribbles sealer, gets loose to prevent screw thread.When primary seal lip 5, secondary sealing lip 3 reach working life or accidental damage, by counterrotating hold-down ring 2, until deviate from from base 1, take off primary seal lip 5, elastic washer 4 and secondary sealing lip 3 successively, the primary seal lip 5 more renewed, secondary sealing lip 3 and elastic washer 4, high-speed oil seal product after assembling can be reused, and does not have any impact to the performance of product.Both shorten the manufacture cycle, again save cost of production.
The periphery of described primary seal lip 5, secondary sealing lip 3 and elastic washer 4 all with 1 contact internal walls of base.Primary seal lip 5 fits tightly along 21 with the pressure of hold-down ring 2, secondary sealing lip 3 fits tightly along 11 with the gear of base 1, running shaft 7 is when High Rotation Speed, primary seal lip 5 and secondary sealing lip 3 can produce a large amount of heats, these heats are mainly through two approach transmission, one is that two is primary seal lip 5, the periphery of secondary sealing lip 3 and base 1 inwall by pressure along 21 and the faying surface of gear along 11.Because faying surface is near crimping lip 71 position, makes the heat of the overwhelming majority be passed to oil sealing by base 1 rapidly and cavity 9 is installed, significantly reduce the temperature of primary seal lip 5 and secondary sealing lip 3.
Pitches of the present invention, detachable high-speed oil seal, without the need to complicated procedures of forming such as sulfuration or PTFE bondings, the air pump solving closed area from structure is inhaled, the replacing of easily damaged parts and heat radiation several respects of lip are started with, and solves the problem that current high-speed oil seal product working life is short and replacement cost is high.
Certainly, the invention is not limited to above-mentioned mode of execution, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (5)
1. a high-speed oil seal structure, it is characterized in that: the base comprising annular and the hold-down ring be contained in described base, the outer rim of described base forms the gear edge extended radially, described base is equipped with secondary sealing lip successively at the inner side ecto-entad on gear edge, elastic washer and primary seal lip, the outer rim of described hold-down ring is formed and extends radially and can compress described secondary sealing lip, the pressure edge of elastic washer and primary seal lip, described primary seal lip and secondary sealing lip are all formed and stretch out and the crimping lip that can coordinate with running shaft outside described confined space, described primary seal lip, confined space is formed between secondary sealing lip and running shaft, described primary seal lip and the secondary sealing lip spiral grooves that pitch reduces gradually when the internal surface of confined space is equipped with excessive to crimping lip.
2. high-speed oil seal structure according to claim 1, it is characterized in that: be threaded connection between described base and hold-down ring, the thread surface between described base and hold-down ring scribbles sealer.
3. high-speed oil seal structure according to claim 1, is characterized in that: the periphery of described primary seal lip, secondary sealing lip and elastic washer all with the contact internal walls of base.
4. high-speed oil seal structure according to claim 1, it is characterized in that: described primary seal lip and secondary sealing lip are the PTFE product of mold pressing, described elastic washer is rubber part, and described base is stainless steel product, and described hold-down ring is stainless steel or carbon structure Steel Work.
5. high-speed oil seal structure according to claim 1, is characterized in that: the cross section of described spiral grooves is triangle or rectangle or circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039631.9A CN104653784A (en) | 2015-01-26 | 2015-01-26 | High-speed oil sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510039631.9A CN104653784A (en) | 2015-01-26 | 2015-01-26 | High-speed oil sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104653784A true CN104653784A (en) | 2015-05-27 |
Family
ID=53245248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510039631.9A Pending CN104653784A (en) | 2015-01-26 | 2015-01-26 | High-speed oil sealing structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN104653784A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870735A (en) * | 2015-12-10 | 2017-06-20 | 北京橡胶工业研究设计院 | A kind of metallic framework PTFE seal for rotary shaft |
| CN108087556A (en) * | 2016-11-23 | 2018-05-29 | 舍弗勒技术股份两合公司 | Box type sealing structure |
| CN108999978A (en) * | 2018-09-17 | 2018-12-14 | 嘉科（安徽）密封技术有限公司 | A kind of PTFE seal lips |
| CN112728094A (en) * | 2021-02-07 | 2021-04-30 | 青岛众力诚达智能科技有限公司 | Rotary sealing structure with wedge-shaped groove pump suction structure |
| CN112963541A (en) * | 2021-02-07 | 2021-06-15 | 青岛众力诚达智能科技有限公司 | Rotary sealing structure with thread pair |
| CN114135674A (en) * | 2021-11-30 | 2022-03-04 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
| CN114458763A (en) * | 2022-01-24 | 2022-05-10 | 江门市格雷亚特流体密封技术有限公司 | Rotary sealing element for air compressor and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167817A (en) * | 1984-12-03 | 1986-06-04 | Aeroquip | Rotary seal with variable pitch hydrothread |
| DE3640346A1 (en) * | 1986-11-26 | 1988-06-09 | Audi Ag | Radial shaft seal |
| US20030168817A1 (en) * | 2002-03-08 | 2003-09-11 | Komatsu Ltd. | Oil seal |
| CN101415975A (en) * | 2006-02-10 | 2009-04-22 | Nok株式会社 | Seal with controllable pump rate |
| CN101936397A (en) * | 2010-09-07 | 2011-01-05 | 青岛开世密封工业有限公司 | Combined PTFE oil seal with vent hole and manufacturing method and mounting method thereof |
-
2015
- 2015-01-26 CN CN201510039631.9A patent/CN104653784A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167817A (en) * | 1984-12-03 | 1986-06-04 | Aeroquip | Rotary seal with variable pitch hydrothread |
| DE3640346A1 (en) * | 1986-11-26 | 1988-06-09 | Audi Ag | Radial shaft seal |
| US20030168817A1 (en) * | 2002-03-08 | 2003-09-11 | Komatsu Ltd. | Oil seal |
| CN101415975A (en) * | 2006-02-10 | 2009-04-22 | Nok株式会社 | Seal with controllable pump rate |
| CN101936397A (en) * | 2010-09-07 | 2011-01-05 | 青岛开世密封工业有限公司 | Combined PTFE oil seal with vent hole and manufacturing method and mounting method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 乐启发等: "填充聚四氟乙烯油封的研究与发展", 《化工生产与技术》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106870735A (en) * | 2015-12-10 | 2017-06-20 | 北京橡胶工业研究设计院 | A kind of metallic framework PTFE seal for rotary shaft |
| CN108087556A (en) * | 2016-11-23 | 2018-05-29 | 舍弗勒技术股份两合公司 | Box type sealing structure |
| CN108087556B (en) * | 2016-11-23 | 2021-03-30 | 舍弗勒技术股份两合公司 | Box type sealing structure |
| CN108999978A (en) * | 2018-09-17 | 2018-12-14 | 嘉科（安徽）密封技术有限公司 | A kind of PTFE seal lips |
| CN112728094A (en) * | 2021-02-07 | 2021-04-30 | 青岛众力诚达智能科技有限公司 | Rotary sealing structure with wedge-shaped groove pump suction structure |
| CN112963541A (en) * | 2021-02-07 | 2021-06-15 | 青岛众力诚达智能科技有限公司 | Rotary sealing structure with thread pair |
| CN114135674A (en) * | 2021-11-30 | 2022-03-04 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
| CN114135674B (en) * | 2021-11-30 | 2023-11-24 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
| CN114458763A (en) * | 2022-01-24 | 2022-05-10 | 江门市格雷亚特流体密封技术有限公司 | Rotary sealing element for air compressor and preparation method thereof |
| CN114458763B (en) * | 2022-01-24 | 2022-08-05 | 江门市格雷亚特流体密封技术有限公司 | Rotary sealing element for air compressor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |