CN105042082A - Self-sealing full-polytetrafluoroethylene oil seal with monitoring function - Google Patents
Self-sealing full-polytetrafluoroethylene oil seal with monitoring function Download PDFInfo
- Publication number
- CN105042082A CN105042082A CN201510393650.1A CN201510393650A CN105042082A CN 105042082 A CN105042082 A CN 105042082A CN 201510393650 A CN201510393650 A CN 201510393650A CN 105042082 A CN105042082 A CN 105042082A
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- CN
- China
- Prior art keywords
- seal
- lip
- sealing lip
- selfsealings
- sealing
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- 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.)
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Classifications
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- 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
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
Abstract
The invention discloses a self-sealing full-polytetrafluoroethylene oil seal with the monitoring function. The oil seal comprises an annular sealing body made from polytetrafluoroethylene, main sealing lips and auxiliary sealing lips, wherein the main sealing lips and the auxiliary sealing lips are integrated with sealing body. The main sealing lips and the auxiliary sealing lips are arranged along the inner wall of the sealing body side by side. A plurality of monitoring oil holes are formed in the circumferential direction of the sealing body and located between the main sealing lips and the auxiliary sealing lips. The oil seal is simple in structure, low in manufacturing cost, small in friction force, long in service life, resistant to high pressure, wide in application range and convenient to install and maintain, has the self-sealing function and the monitoring function and is applicable to sealing of rotating shafts under the work conditions of high speed, high pressure, poor lubrication and corrosive mediums.
Description
Technical field
The present invention relates to technical field of sealing technology, particularly the full teflon seal of a kind of selfsealings monitored.
Background technique
At present, what the sealing of running shaft generally adopted is rotary shaft lip seal, be commonly referred to oil sealing, be widely used in the parts such as the gearbox of engineering machinery, ransaxle, as the front and back output shaft of gearbox, the place such as main reducing gear, wheel limit of ransaxle, rotary shaft lip seal is used for needing the oil pocket of sealing and extraneous isolation, oil sealing has ensured internal oil sealing, externally dust-proof.The basic structure of rotary shaft lip seal comprises rubber seal portion, metal frame or metal shell and metal spring.
But rotary shaft lip seal can not be applied to the sealing of the complex working conditions such as high speed, high pressure, insufficient lubrication, Korrosionsmedium, and mechanical seal is made up of more than ten parts, complex structure, bulky, manufacture cost is high, it is large to take up room, dismounting is difficult, the life-span is short, and itself does not have self sealing action, thus be of limited application, and above two kinds of sealed products can not realize the real-time monitoring to sealing effect, along with machinery is to high speed, high pressure, miniaturization, rotation axis seal is had higher requirement.
Summary of the invention
For the poor sealing performance, the life-span that solve existing sealing configuration are short, the problem of high speed and high pressure, Korrosionsmedium operating mode can not be applied to, the invention discloses the full teflon seal of a kind of selfsealings monitored, comprise the annular sealing member be made up of teflon and with the integrated primary seal lip of seal and secondary sealing lip, described primary seal lip and secondary sealing lip are arranged side by side along seal inwall, circumferencial direction along described seal is provided with multiple monitoring oilhole, and described monitoring oilhole is between primary seal lip and secondary sealing lip.
As a further improvement on the present invention, described primary seal lip and secondary sealing lip are provided with fixed end and free end, First Transition circular arc is formed between described fixed end side and seal inwall, opposite side is vertical with seal inwall to be arranged, and the joint of described fixed end and free end forms the second transition arc.
As a further improvement on the present invention, the angle of described free end and vertical direction is 0-45 °, and the angle of described free end top and substantially horizontal is 10-60 °.
As a further improvement on the present invention, the thickness of described primary seal lip and secondary sealing lip is 0.5-5mm, the radius of described First Transition circular arc is 0.8-1.5 times of primary seal lip and secondary sealing lip thickness, and the radius of described second transition arc is 1-2 times of primary seal lip and secondary sealing lip thickness.
As a further improvement on the present invention, described primary seal lip and secondary sealing lip are all obliquely installed in the opposite direction along with hydrodynamic pressure side.
As a further improvement on the present invention, described primary seal lip is along being obliquely installed in the opposite direction with hydrodynamic pressure side, and described secondary sealing lip is obliquely installed along the direction identical with hydrodynamic pressure direction.
As a further improvement on the present invention, described seal is also provided with the 3rd sealing lip, and described 3rd sealing lip is obliquely installed along the direction identical with hydrodynamic pressure direction.
As a further improvement on the present invention, in described seal, be also provided with shaping cover, described shaping cover and primary seal lip, secondary sealing lip and the 3rd sealing lip interference fit.
As a further improvement on the present invention, described seal cylindrical place is provided with 2 road sealing grooves, and described 2 road sealing grooves lay respectively at the both sides of monitoring oilhole, are provided with rubber ring in described seal groove.
As a further improvement on the present invention, the circle end face both sides of described seal are provided with chamfering, and the angle of described chamfering is 0-50 °, and chamfering length is 0-5mm.
The invention has the beneficial effects as follows:
Structure of the present invention is simple, low cost of manufacture, frictional force are little, long service life, high pressure resistant, applicability is extensive, convenient for installation and maintenance, and the function that there are selfsealings, can monitor, the sealing of the running shaft of high speed and high pressure, insufficient lubrication and Korrosionsmedium operating mode can be applicable to.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural front view of first embodiment of the invention;
Fig. 2 is the partial sectional view of first embodiment of the invention side structure;
Fig. 3 is the partial enlarged drawing at A place in Fig. 2;
Fig. 4 is the connection diagram that in first embodiment of the invention, sealing lip and shaping are overlapped;
Fig. 5 is the partial sectional view of second embodiment of the invention side structure;
Fig. 6 is the partial sectional view of third embodiment of the invention side structure;
Fig. 7 is the partial sectional view of fourth embodiment of the invention side structure;
Fig. 8 is the partial sectional view of fifth embodiment of the invention side structure;
Fig. 9 is working principle schematic diagram of the present invention.
Mark in figure: 1,10-seal; 2,20,40-primary seal lip; 3,30, the secondary sealing lip of 50-; 60-the 3rd sealing lip; 21-fixed end; 22-free end; 23-First Transition circular arc; 24-second transition arc; 4-monitors oilhole; 5-seal groove; 6-rubber ring; 7,70-shaping cover; 71-imports circular arc; 8-running shaft; 9-sealing seat; 11-gland.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.
Embodiment one:
As depicted in figs. 1 and 2, the full teflon seal of a kind of selfsealings monitored, comprise the annular sealing member 1 be made up of teflon and with the integrated primary seal lip of seal 12 and secondary sealing lip 3, primary seal lip 2 and secondary sealing lip 3 are arranged side by side along seal 2 inwall; Circumferencial direction along seal 1 is provided with multiple monitoring oilhole 4, and monitoring oilhole 4 is between primary seal lip 2 and secondary sealing lip 3; Seal 1 cylindrical place is provided with the both sides that 2 road sealing groove 5,2 road sealing grooves 5 lay respectively at monitoring oilhole 4; Be provided with rubber ring 6 in seal groove 5, the circle end face both sides of seal 1 are provided with chamfering 11, and the angle c of chamfering 11 is 0-50 °, and chamfering length d is 0-5mm.Wherein, integral forming process can be the processing technologys such as turning, injection moulding, mold pressing.
As shown in Figure 3, primary seal lip 2 and secondary sealing lip 3 are provided with fixed end 21 and free end 22, form First Transition circular arc 23 between fixed end 21 side and seal 1 inwall, opposite side is vertical with seal 1 inwall to be arranged, and fixed end 21 forms the second transition arc 24 with the joint of free end 22; Free end 22 is 0-45 ° with the angle α of vertical direction, and the angle β of free end 22 top and substantially horizontal is 10-60 °.
The thickness e of primary seal lip 2 and secondary sealing lip 3 is 0.5-5mm, and the radius r 1 of First Transition circular arc 23 is 0.8-1.5 times of primary seal lip 2 and secondary sealing lip 3 thickness e, and the radius r 2 of the second transition arc 24 is 1-2 times of primary seal lip 2 and secondary sealing lip 3 thickness e.
As shown in Figure 4, primary seal lip 2 and secondary sealing lip 3 are all obliquely installed in the opposite direction along with hydrodynamic pressure P side; Shaping cover 7 is also provided with, shaping cover 7 and primary seal lip 2 and secondary sealing lip 3 interference fit in seal 1; The wall thickness f of shaping cover 7 is 0.8-10mm, and its cylindrical two ends are provided with and import circular arc 71, and its radius r 3 is 0.2-0.8 times of wall thickness f; The external diameter of shaping cover 7 is greater than internal diameter that primary seal lip 2 and secondary sealing lip 3 form and is less than the diameter of running shaft to be sealed, and such primary seal lip 2 and secondary sealing lip 3 will be shaped cover 7 and prop up formation interference fit, thus produce preliminary enclasping force.
Embodiment two:
As shown in Figure 5, in the present embodiment, primary seal lip 20 is obliquely installed in the opposite direction along with hydrodynamic pressure P side, and secondary sealing lip 30 is obliquely installed along the direction identical with hydrodynamic pressure P direction.
Embodiment three:
As shown in Figure 6, in the present embodiment, seal 10 is provided with primary seal lip 40, secondary sealing lip 50 and the 3rd sealing lip 60, primary seal lip 40 and secondary sealing lip 50 are all obliquely installed in the opposite direction along with hydrodynamic pressure P side, and the 3rd sealing lip 60 is obliquely installed along the direction identical with hydrodynamic pressure P direction; Shaping cover 70 is also provided with, shaping cover 70 and primary seal lip 40, secondary sealing lip 50 and the 3rd sealing lip 60 interference fit in seal 10.
Embodiment four:
As shown in Figure 7, in the present embodiment, also can play seal action by the interference fit between seal 1 outer wall and sealing seat, at this moment also can not use rubber ring.
Embodiment five:
As shown in Figure 8, in the present embodiment, when needs work under corrosivity or complex dielectrics condition, rubber ring 6 can adopt coated O shape to enclose, and because of the coated fluoroplastic in its outer ring, corrosion-resistant dielectric behavior is restricted hardly, has greatly expanded the using scope of oil sealing.
In above-described embodiment two-five, the structure be not described is identical with the structure in embodiment one, repeats no more here.
Fig. 9 is working principle schematic diagram of the present invention, below for the oil seal structure in embodiment one, working principle of the present invention is described.
During use, first take off shaping of the present invention cover 7, again seal 1 is arranged in sealing seat 9 through running shaft 8, the other end is fixed by gland 11, diameter due to running shaft 8 is greater than the external diameter of shaping cover 7, and primary seal lip 2 and secondary sealing lip 3 by support is large further, thus produce larger radial enclasping force, primary seal lip 2 and secondary sealing lip 3 are tightly embraced on rotating shaft 8, thus realizes sealing.
Because polytetrafluoroethylmaterial material has the function of " memory ", namely there is the continual function resetting into its original-shape, thus produce the radial force continued, make primary seal lip 2 and secondary sealing lip 3 hold running shaft 8 tightly, namely oil sealing of the present invention has self-sealing function.
Under the effect of hydrodynamic pressure P, the enclasping force of primary seal lip 2 and secondary sealing lip 3 increases further, and sealability is better, and polytetrafluoroethylmaterial material has low frictional behavior and good abrasion resistance properties, can purchase the operating mode adapting to High Rotation Speed; Secondary sealing lip 3 is glanded 11 and blocks, and plays a protective role, even if also can not overturn under higher hydrodynamic pressure, therefore can bear higher pressure, expand using scope.
Seal 1 is circumferentially provided with 1-16 monitoring oilhole 4, it can play the effect in 2 at circumferencial direction, one is by the oilhole 91 on sealing seat 9 to injecting lubricant grease between primary seal lip 2 and secondary sealing lip 3, to make primary seal lip 2 and secondary sealing lip 3 be in good lubricating status to improve the seal operation life-span; Two is, after oil film accumulation forms draining after primary seal lip 2 long-term work, carry out Real-Time Monitoring, achieve the sealing of " visual ", improve the safety and reliability that oil sealing uses by monitoring oilhole 4 to the situation of leaking.
Secondary sealing lip 3 plays secondary seal effect, further increases sealing and the reliability of oil sealing.When the more needs of external dust are dust-proof, the structure of secondary sealing lip 30 or the 3rd sealing lip 60 in embodiment two or embodiment three can be adopted, sealing lip is tilted to the side contrary with primary seal lip 2, to prevent external dust from entering sealing system, and the effect of impact sealing.
Structure of the present invention is simple, low cost of manufacture, frictional force are little, long service life, applicability are extensive, convenient for installation and maintenance, and the function that there are selfsealings, can monitor, the sealing of high speed and high pressure, Korrosionsmedium operating mode can be applicable to.
The foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; the structure characteristic of the various embodiments described above mutually can combine, replace; form new embodiment; within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the full teflon seal of the selfsealings that can monitor, it is characterized in that, comprise the annular sealing member be made up of teflon and with the integrated primary seal lip of seal and secondary sealing lip, described primary seal lip and secondary sealing lip are arranged side by side along seal inwall, circumferencial direction along described seal is provided with multiple monitoring oilhole, and described monitoring oilhole is between primary seal lip and secondary sealing lip.
2. the full teflon seal of the selfsealings monitored according to claim 1, it is characterized in that, described primary seal lip and secondary sealing lip are provided with fixed end and free end, First Transition circular arc is formed between described fixed end side and seal inwall, opposite side is vertical with seal inwall to be arranged, and the joint of described fixed end and free end forms the second transition arc.
3. the full teflon seal of the selfsealings monitored according to claim 2, is characterized in that, the angle of described free end and vertical direction is 0-45 °, and the angle of described free end top and substantially horizontal is 10-60 °.
4. the full teflon seal of the selfsealings monitored according to claim 3, it is characterized in that, the thickness of described primary seal lip and secondary sealing lip is 0.5-5mm, the radius of described First Transition circular arc is 0.8-1.5 times of primary seal lip and secondary sealing lip thickness, and the radius of described second transition arc is 1-2 times of primary seal lip and secondary sealing lip thickness.
5. the full teflon seal of the selfsealings monitored according to claim 4, is characterized in that, described primary seal lip and secondary sealing lip are all obliquely installed in the opposite direction along with hydrodynamic pressure side.
6. the full teflon seal of the selfsealings monitored according to claim 4, is characterized in that, described primary seal lip is along being obliquely installed in the opposite direction with hydrodynamic pressure side, and described secondary sealing lip is obliquely installed along the direction identical with hydrodynamic pressure direction.
7. the full teflon seal of the selfsealings monitored according to claim 5, is characterized in that, described seal is also provided with the 3rd sealing lip, and described 3rd sealing lip is obliquely installed along the direction identical with hydrodynamic pressure direction.
8. the full teflon seal of the selfsealings monitored according to claim 7, is characterized in that, be also provided with shaping cover in described seal, described shaping cover and primary seal lip, secondary sealing lip and the 3rd sealing lip interference fit.
9. the full teflon seal of the selfsealings monitored according to claim 8, is characterized in that, described seal cylindrical place is provided with 2 road sealing grooves, and described 2 road sealing grooves lay respectively at the both sides of monitoring oilhole, are provided with rubber ring in described seal groove.
10. the full teflon seal of the selfsealings monitored according to claim 9, is characterized in that, the circle end face both sides of described seal are provided with chamfering, and the angle of described chamfering is 0-50 °, and chamfering length is 0-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393650.1A CN105042082A (en) | 2015-07-07 | 2015-07-07 | Self-sealing full-polytetrafluoroethylene oil seal with monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393650.1A CN105042082A (en) | 2015-07-07 | 2015-07-07 | Self-sealing full-polytetrafluoroethylene oil seal with monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105042082A true CN105042082A (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510393650.1A Pending CN105042082A (en) | 2015-07-07 | 2015-07-07 | Self-sealing full-polytetrafluoroethylene oil seal with monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105042082A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539902A (en) * | 2018-04-03 | 2018-09-14 | 重庆长安汽车股份有限公司 | A kind of motor sealing device of electric vehicle |
| CN116576255A (en) * | 2023-07-13 | 2023-08-11 | 江苏洁维生物设备股份有限公司 | Bioreactor (mixing) shaft sealing device |
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| CN204061910U (en) * | 2014-09-08 | 2014-12-31 | 金坛市德博密封技术有限公司 | A kind of perfusion type lubrication backbone sealing ring |
| CN104500746A (en) * | 2014-11-07 | 2015-04-08 | 南通密炼捏合机械有限公司 | Rotating shaft sealing structure |
| CN104620030A (en) * | 2012-09-14 | 2015-05-13 | 科德宝两合公司 | Gasket, in particular for a pressurised liquid |
| CN204878740U (en) * | 2015-07-07 | 2015-12-16 | 青岛睿辰密封科技有限公司 | Full polytetrafluoroethylene oil blanket of self sealss that can monitor |
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| JP2004011732A (en) * | 2002-06-06 | 2004-01-15 | Toyo Seal Kogyo Kk | Side lip for bearing seal |
| CN2578619Y (en) * | 2002-06-12 | 2003-10-08 | 青岛基珀密封工业有限公司 | Non-assembled PTFE oil seal |
| CN101517286A (en) * | 2006-10-16 | 2009-08-26 | Nok株式会社 | Sealing device |
| DE102007037214A1 (en) * | 2007-08-07 | 2009-02-12 | Robert Bosch Gmbh | Shaft seal system |
| CN201875142U (en) * | 2010-12-14 | 2011-06-22 | 重庆智延科技发展有限公司 | Skeleton oil seal |
| CN102022547A (en) * | 2010-12-17 | 2011-04-20 | 哈尔滨东安实业发展有限公司 | Preparation method of polytetrafluoroethylene double-sealing-lip sealing ring device |
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| US20140319773A1 (en) * | 2013-04-26 | 2014-10-30 | Crosby HOFF | Rotary seal device |
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| CN204061910U (en) * | 2014-09-08 | 2014-12-31 | 金坛市德博密封技术有限公司 | A kind of perfusion type lubrication backbone sealing ring |
| CN104500746A (en) * | 2014-11-07 | 2015-04-08 | 南通密炼捏合机械有限公司 | Rotating shaft sealing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539902A (en) * | 2018-04-03 | 2018-09-14 | 重庆长安汽车股份有限公司 | A kind of motor sealing device of electric vehicle |
| CN108539902B (en) * | 2018-04-03 | 2020-05-08 | 重庆长安汽车股份有限公司 | Motor sealing device of electric automobile |
| CN116576255A (en) * | 2023-07-13 | 2023-08-11 | 江苏洁维生物设备股份有限公司 | Bioreactor (mixing) shaft sealing device |
| CN116576255B (en) * | 2023-07-13 | 2023-10-03 | 江苏洁维生物设备股份有限公司 | Bioreactor (mixing) shaft sealing device |
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Application publication date: 20151111 |