CN109458458A - High-speed oil seal structure, gearbox and speed reducer - Google Patents
High-speed oil seal structure, gearbox and speed reducer Download PDFInfo
- Publication number
- CN109458458A CN109458458A CN201811392014.7A CN201811392014A CN109458458A CN 109458458 A CN109458458 A CN 109458458A CN 201811392014 A CN201811392014 A CN 201811392014A CN 109458458 A CN109458458 A CN 109458458A
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- Prior art keywords
- spring
- oil seal
- skeleton
- speed
- seal structure
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- 239000003638 chemical reducing agent Substances 0.000 title claims description 15
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 229920001971 elastomer Polymers 0.000 claims abstract description 24
- 239000005060 rubber Substances 0.000 claims abstract description 24
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 16
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 15
- 238000009966 trimming Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 24
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 86
- 238000000034 method Methods 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- YAFQFNOUYXZVPZ-UHFFFAOYSA-N liproxstatin-1 Chemical compound ClC1=CC=CC(CNC=2C3(CCNCC3)NC3=CC=CC=C3N=2)=C1 YAFQFNOUYXZVPZ-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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
- F16J15/32—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
-
- 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
-
- 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
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
Abstract
A kind of high-speed oil seal structure provided by the invention is the ring spring of V-type including the tubbiness skeleton that cross section is L-type and cross section；Spring is set in skeleton, is contacted at the top of the connecting pin of spring and skeleton, the free end of the first spring leaf is contacted with the inner sidewall of skeleton；Rubber layer is coated on the outer wall of skeleton and the outer wall of second spring piece, it is provided in the rubber layer on second spring piece top for dust-proof secondary lip, it is provided with the main lip for sealing in the rubber layer of second spring piece lower part, is coated with one layer of wearing layer on the sealing surface of main lip.The high-speed oil seal will effectively be combined the advantages of fluorubber material with PTFE material characteristic, and individual material properties and structural advantage are chosen, and realize Performance optimization, is reduced oil sealing abrasion, is increased product service life, meet the use demand of current high speed series of products.
Description
Technical field
The present invention relates to mechanical seal field, specially a kind of high-speed oil seal structure, and the high-speed oil seal is installed
Gearbox and speed reducer.
Background technique
With the high speed development of domestic automobile industry, traditional automobile industry has been unable to satisfy the market demand, while environmental protection
It is required that continuous improvement, also driven the new round revolution of automobile industry, i.e. new-energy automobile industry.Speed reducer is as most of
New-energy automobile standard configuration components, are responsible for transmitting kinetic energy, improve the effect of torque, with the fast development of new-energy automobile,
Its properties of product requires constantly to refresh, while the continuous improvement of automobile motor output revolving speed, requires speed reducer input speed same
Step improves.
For speed reducer product, because input shaft rotating speed is synchronous with motor output speeds, speed ratio is larger, therefore input shaft oil seal is wanted
It asks and seals class product much higher than other positions.Country's speed reducer revolving speed requires to concentrate on 10000rpm-12000rpm at present, and revolves
To requiring mostly bidirectional rotation.Simultaneously speed reducer product need to meet in high temperature, extremely the special operation conditions such as cold, High aititude make
With, and itself oil temperature is higher (80 DEG C -120 DEG C of normal temperature) during the work time, limiting temperature is about 140 DEG C, additional to make
The factors such as high revolving speed, Medium Oil present in process are practical higher to speed reducer oil sealing performance requirement.
Current mainstream oil seal product both domestic and external is still traditional pure rubber class skeleton rotary oil seal, be nineteen twenty-nine by
German, which invents, to be used, and has 80 years history so far, mainly using rubber materials such as fluorubber, nitrile rubbers as primary seal material
Material, then be made by process flows such as molding, vulcanizations.
Overwhelming majority high-speed oil seal product uses Conventional fluoroelastomeric oil sealing or novel PTFE oil sealing as main close at present
Envelope means.Common fluorubber use temperature range itself is -20 DEG C -200 DEG C, it is contemplated that fluorubber material is using temperature beyond it
After degree requires, sealing performance can be changed, the especially current ring in the fluorubber outside framework oil seal used at -40 DEG C on a large scale
Under border, product, which is hardened, leads to seal failure, influences the normal use of gearbox.Certain special fluorubber material can be with using temperature
Meet current requirement, but the unsuitable large-scale promotion of its high layer sheet uses.And PTFE material oil sealing is poor with axis,
High speed rotation situation labial plate recovery capacity deficiency is carried out in axis, tracing ability is poor, is unable to satisfy high frequency brought by high speed rotation
Vibration.
In conclusion current most high-speed oil seal product, is unable to satisfy and runs at high speed for a long time, be unable to satisfy market
It needs.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of high-speed oil seal structure.Solves speed reducer oil sealing
The oil leakage fault appeared in high revolving speed, high temperature, ultra-long time operation process.
The present invention is to be achieved through the following technical solutions:
A kind of high-speed oil seal structure is the ring spring of V-type including the tubbiness skeleton that cross section is L-type and cross section；
Spring includes the first spring leaf of annular set gradually from outside to inside and annular second spring piece, annular first spring
The upper end of piece and annular second spring piece is connected；Spring is set in skeleton, is contacted at the top of the connecting pin of spring and skeleton, the
The free end of one spring leaf is contacted with the inner sidewall of skeleton；
It is coated with rubber layer on the outer wall of skeleton and the outer wall of second spring piece, is set in the rubber layer on second spring piece top
It is equipped with for dust-proof secondary lip, the main lip for sealing, the sealing surface of main lip is provided in the rubber layer of second spring piece lower part
It is upper to be coated with one layer of wearing layer.
Optionally, the wearing layer is PTFE coating.
Optionally, the rubber layer is fluororubber layer.
Optionally, the quantity of the secondary lip is multiple, the axially spaced setting of multiple pair lips.
Optionally, the surface of the rubber layer of the skeleton lateral wall is axially disposed corrugated surface.
Optionally, the bottom of the main lip is disposed with the trimming slot of annular and annular cuts labial surface.
Optionally, the angle for cutting labial surface is 45 °.
Optionally, chamfering is arranged in the bottom of the skeleton.
Present invention also provides a kind of gearbox, above-mentioned high-speed oil seal is provided on the transmission shaft of the gearbox.
Present invention also provides a kind of speed reducer, above-mentioned high-speed oil seal is provided on the transmission shaft of the speed reducer.
Compared with prior art, the invention has the following beneficial technical effects:
The high-speed oil seal uses section for the spring of V-type, and V-type acting force of the spring direction is the radial direction along axis, with axis
Bounce direction it is consistent, V-type spring is run at high speed in axis in hopping process, can quickly provide the pretightning force of oil seal lip radial direction
Compensation makes main lip possess good followability, improves the tracing ability of oil seal lip and axis.It is coated simultaneously in main lip wear-resisting
Layer, improves the wear-resisting property of oil sealing, prolongs the service life.
Wear-resistant coating uses PTFE material, and the material friction coefficient is small, and coefficient of friction can achieve 0.11-0.17, remote low
Abrasion can be effectively reduced in the PTFE material of the coefficient of friction of General Purpose Rubber material, the sealing surface spraying of main lip, reduce heat
Amount generates, and reduces to axis surface abrasion, improves transmission efficiency.
Further rubber layer uses fluorubber, and fluorubber is used as material of main part, and elasticity is preferable, and with the followability of axis compared with
Good, resistance to eccentric and anti-high-frequency vibration ability is stronger, by fluorubber in conjunction with two kinds of material advantages of PTFE, makes the high-speed oil seal can be with
Long time running under 10000rpm-12000rpm revolving speed is born, the wearability of main lip is increased, and then improves the use longevity of oil sealing
Life.
Further using three secondary lips, effectively prevents introduced contaminants and enter inside oil sealing and oil seal lip is caused to damage
Wound, greatly enhances high-speed oil seal dirt exclusion capabilities.
Further, the lateral wall of high-speed oil seal uses chamfer design using corrugated surface and lower end, reduces oil sealing pressing-in force, drop
Low oil sealing assembles risk, and oil sealing is avoided to generate trimming.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of high-speed oil seal of the present invention；
Fig. 2 is the force analysis figure of high-speed oil seal of the present invention；
Fig. 3 is the force analysis figure of the existing oil sealing of the present invention.
In figure: 1, main lip；2, spring；3, trimming slot；4, secondary lip；5, corrugated surface；6, skeleton.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, described to be explanation of the invention rather than limit
It is fixed.
A kind of high-speed oil seal is the ring spring 2 of V-type including the barreled ring skeleton 6 that cross section is L-type and cross section.
As shown in Figure 1, the horizontal ends in the L-type section of skeleton 6 are located at the top of vertical end, and the elongated end of horizontal ends is to bone
The center of frame 1 extends, and spring 2 is set in the inside of skeleton.
Spring 2 includes the first spring leaf of the annular set gradually from outside to inside and the second spring piece of annular, the first bullet
Reed is connected with the upper end of second spring piece, and connecting pin is contacted with the inner top surface of skeleton, the lower end of the first spring leaf and skeleton 6
Inner wall contact.
As shown in figure 1, rubber layer, the inner wall of skeleton 6 and first are coated on the outer wall of the outer wall of skeleton 6 and second spring piece
Rubber layer is filled in space between the outer wall of spring leaf.
The rubber layer of cladding and the rubber layer of filling are fluorubber.
The top of the rubber layer of second spring piece is provided with the secondary lip group for preventing dust, and secondary lip group includes multiple from upper
Spaced annular secondary lip 4, preferably 3 under and.Three secondary lips effectively prevent introduced contaminants enter it is right inside oil sealing
Oil seal lip causes centainly to damage.It ensure that high-speed oil seal cleaning inside, enhance high-speed oil seal service life.
The lower part of the rubber layer of second spring piece is provided with the main lip 1 of annular, and PTFE painting is coated on the sealing surface of main lip 1
Layer, for increasing wear-resisting property.The bottom of main lip 1 sets gradually the trimming slot 3 of annular and annular cuts labial surface, cuts the angle of labial surface
Degree is 45 °, and cutter in the lower end trimming to high-speed oil seal, cut labial surface and go deep into trimming slot, and trimming slot is anti-by the end edge of cutter
Only cutter is avoided directly to contact with lip when deburring, in order to avoid because of lip position existing defects caused by trimming extremely.
It is provided on the outer wall of the vertical sidewall of skeleton 6 along axial continuous circular shape ripple, it is continuous annular corrugated from upper
And lower setting, it is sealed using annular corrugated, the front of high-speed oil seal is sealed, it, can using multiple continuous linear sealings
Bear bigger pressure.
Chamfering structure is arranged in the lower end of skeleton 6, forms guide section, facilitates the installation of high-speed oil seal, while improving oil sealing and existing
Efficiency during deburring.
Outside framework oil seal is the Typical Representative of oil sealing.The effect of oil sealing is the component that will need to lubricate in transmission parts and power output
Component isolation, is unlikely to allow oil seepage.Skeleton plays the role of reinforcement just as the reinforcing bar inside concrete component, and
Oil sealing is set to be able to maintain shape and tension.In general, outside framework oil seal in a free state, internal diameter is smaller than the diameter of axle, that is, has certain
Magnitude of interference.Therefore, after oil sealing is packed on oil seal seat and axis, the pressure of the main lips of oil sealing and own recovery characteristics pair
Axis, which generates, certain seizes power, the good followability of lips and the compensatory power that seizes that ensure that oil sealing, the high speed of the application
Oil enveloping structure is by performances perfection knots such as the self-lubrications and low abrasion, high temperature resistant of the followability of the main lip of fluorubber and PTFE coating
It closes.During oil sealing runs at high speed, lubricating oil can generate oil film, the rigidity of oil film in oil seal lip on piece under splashing lubricating status
So that oil film and air contact jaw is formed a new lunar surface just, it is therefore prevented that the leakage of working media, to realize the close of rotary shaft
Envelope.
The high-speed oil seal of the application is mainly for the solution speed reducer product oil sealing that reality is encountered at present is in high revolving speed, height
Oil leakage fault appeared in temperature, ultra-long time operation process.Particular under some special operation conditions, specific condition, meet
Product hermeticity energy demand.
The high-speed oil seal, relatively traditional oil sealing are compared, and increase PTFE coating, PTFE material friction at the sealing surface of main lip
Coefficient is small, and coefficient of friction can achieve 0.11-0.17, and far below the coefficient of friction of General Purpose Rubber material, the sealing surface of main lip sprays
The PTFE material of painting can effectively reduce abrasion, reduce heat and generate, and reduce to axis surface abrasion, improve transmission efficiency.Benefit
With the good high- and low-temperature resistance of modified ptfe material, media-resistant and good self-lubricating property, it can effectively prevent oil sealing surface and go out
Existing dry combustion method carbonization phenomenon.For fluorubber as material of main part, elasticity is preferably, preferable with the followability of axis, resistance to eccentric and anti-high frequency
Vibration ability is stronger.By fluorubber in conjunction with two kinds of material advantages of PTFE, the high-speed oil seal is allow to bear 10000rpm-
Long time running under 12000rpm revolving speed increases the wearability of main lip, and then improves the service life of oil sealing.
Meanwhile as shown in figure 3, traditional helical spring force direction is the tangential direction along axis.As shown in Fig. 2, this
The high-speed oil seal of application uses section for the spring of V-type, and V-type acting force of the spring direction is the radial direction along axis, the jump with axis
Dynamic direction is consistent；The V-type spring being distributed along axis surrounding continuous uniform is run at high speed in axis in hopping process, can quickly provide oil
The preload force compensating for sealing lip radial direction makes main lip and waist possess perfect followability, and raising oil seal lip and axis are followed
Property and resistance to eccentric and high frequency tolerant vibration ability.
Secondly, main lip is adopted and is molded with a mold, and in the following setting trimming slot of main lip, avoid causing to lead during the cutting process
Lip damage.
In addition, using three secondary lips, effectively prevents introduced contaminants and enter inside oil sealing and oil seal lip is caused centainly
Damage.It ensure that oil sealing cleaning inside, enhance oil sealing service life.Especially in the case where outer work condition is more severe, prevent
Stop introduced contaminants to enter inside oil sealing, greatly enhances high-speed oil seal dirt exclusion capabilities.
Finally, the lateral wall of high-speed oil seal uses corrugated end face and big chamfer design, oil sealing pressing-in force is reduced, reduces oil sealing
Risk is assembled, and oil sealing is avoided to generate trimming.Therefore, the high-speed oil seal is especially suitable under operating condition comparatively adverse circumstances,
Effect is relatively prominent.
The high-speed oil seal will effectively be combined the advantages of fluorubber material with PTFE material characteristic, choose individual material properties and
Structural advantage realizes Performance optimization, reduces oil sealing abrasion, increases product service life, meets high speed series at present
The use demand of product.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of high-speed oil seal structure, which is characterized in that including the tubbiness skeleton (6) that cross section is L-type and cross section be V-type
Ring spring (2)；
Spring (2) includes the first spring leaf of annular set gradually from outside to inside and annular second spring piece, annular first spring
The upper end of piece and annular second spring piece is connected；Spring (2) is set in skeleton (6), the connecting pin and skeleton (6) of spring (2)
Top contact, the free end of the first spring leaf is contacted with the inner sidewall of skeleton (6)；
It is coated with rubber layer on the outer wall of skeleton (6) and the outer wall of second spring piece, is set in the rubber layer on second spring piece top
It is equipped with for dust-proof secondary lip (4), the main lip for sealing is provided in the rubber layer of second spring piece lower part, main lip (1)
One layer of wearing layer is coated on sealing surface.
2. high-speed oil seal structure according to claim 1, which is characterized in that the wearing layer is PTFE coating.
3. high-speed oil seal structure according to claim 1, which is characterized in that the rubber layer is fluororubber layer.
4. high-speed oil seal structure according to claim 1, which is characterized in that the quantity of the pair lip (4) is multiple, multiple pairs
The axially spaced setting of lip.
5. high-speed oil seal structure according to claim 1, which is characterized in that the table of the rubber layer of skeleton (1) lateral wall
Face is axially disposed corrugated surface (5).
6. high-speed oil seal structure according to claim 1, which is characterized in that the bottom of the main lip (1) is disposed with ring
The trimming slot (3) of shape and annular cut labial surface.
7. high-speed oil seal structure according to claim 6, which is characterized in that the angle for cutting labial surface is 45 °.
8. high-speed oil seal structure according to claim 1, which is characterized in that chamfering is arranged in the bottom of the skeleton (1).
9. a kind of gearbox, which is characterized in that it is described in any item high to be provided with claim 1-8 on the transmission shaft of the gearbox
Fast oil sealing.
10. a kind of speed reducer, which is characterized in that it is described in any item to be provided with claim 1-8 on the transmission shaft of the speed reducer
High-speed oil seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392014.7A CN109458458A (en) | 2018-11-21 | 2018-11-21 | High-speed oil seal structure, gearbox and speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392014.7A CN109458458A (en) | 2018-11-21 | 2018-11-21 | High-speed oil seal structure, gearbox and speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109458458A true CN109458458A (en) | 2019-03-12 |
Family
ID=65611140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811392014.7A Pending CN109458458A (en) | 2018-11-21 | 2018-11-21 | High-speed oil seal structure, gearbox and speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109458458A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324768A (en) * | 2020-09-01 | 2021-02-05 | 上海威纳工程技术有限公司 | Sliding bearing sealing device, online bonding installation tool and online bonding installation method thereof |
| CN113531123A (en) * | 2021-08-09 | 2021-10-22 | 南京利德东方橡塑科技有限公司 | Bearing seal with support finger spring |
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| CN205260839U (en) * | 2016-01-05 | 2016-05-25 | 南阳天一密封股份有限公司 | Oil seal for output shaft of speed variator |
| CN206626185U (en) * | 2017-03-29 | 2017-11-10 | 庞金川 | A kind of radial contraction type combined type subdivision oil sealing |
| CN209540035U (en) * | 2018-11-21 | 2019-10-25 | 陕西法士特汽车传动集团有限责任公司 | High-speed oil seal structure, gearbox and speed reducer |
-
2018
- 2018-11-21 CN CN201811392014.7A patent/CN109458458A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201539566U (en) * | 2009-10-23 | 2010-08-04 | 宁国市瑞普密封件有限公司 | Lip mouth PTFE coating oil seal |
| CN202451838U (en) * | 2012-01-04 | 2012-09-26 | 广州机械科学研究院有限公司 | PTFE (Polytetrafluoroethylene) subdivision oil seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324768A (en) * | 2020-09-01 | 2021-02-05 | 上海威纳工程技术有限公司 | Sliding bearing sealing device, online bonding installation tool and online bonding installation method thereof |
| CN113531123A (en) * | 2021-08-09 | 2021-10-22 | 南京利德东方橡塑科技有限公司 | Bearing seal with support finger spring |
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