CN106122480B - A kind of new structural automobile crane oil sealing - Google Patents

A kind of new structural automobile crane oil sealing Download PDF

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Publication number
CN106122480B
CN106122480B CN201610692029.XA CN201610692029A CN106122480B CN 106122480 B CN106122480 B CN 106122480B CN 201610692029 A CN201610692029 A CN 201610692029A CN 106122480 B CN106122480 B CN 106122480B
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face
rubber
lips
sealing
filling
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CN106122480A (en
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吴锐
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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
    • F16J15/32—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
    • 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
    • F16J15/324—Arrangements for lubrication or cooling of the sealing itself
    • 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
    • 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
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

Abstract

The invention discloses a kind of new structural automobile crane oil sealings, it is two layers of stair-stepping endless metal skeleton including section, vulcanized rubber overcoat is attached on the vertical plane of lower layer's step of endless metal skeleton outer ring and bottom surface, the section that rubber system is attached on lower layer's step surface of endless metal skeleton inner ring and the vertical plane of upper layer step is the sealing lips supporter of n shape, filling-modified polytetrafluoroethylene (PTFE) face, which is equipped with, in the inner peripheral surface of sealing lips supporter seals lips, filling-modified polytetrafluoroethylene (PTFE) face seal lips and endless metal skeleton appear on the stage terrace lower end surface between set rubber layer conveyed by elasticity.Structure of the invention is ingenious, more durable, better tightness.

Description

A kind of new structural automobile crane oil sealing
Technical field
Crankshaft oil seal is indispensable component in the lubricating arrangement of various automobile engines, in existing technology, Common crankshaft oil seal is that the rubber bodies that seal lip is provided with by metallic framework and spring are constituted, and is had using spring and rubber Some elasticity makes close contact between sealing lip and rotary shaft achieve the purpose that prevent oil leak, meanwhile, it is ground in sealing lip Automatic compensating action is played after damage.Also the oil sealing having is in oil seal lip installation rotation to grinding set, rotary sleeve internal diameter and rotary shaft phase Interworking combined pressure system is packed into, and rotary shaft when rotated, drives the rotation on oil sealing to rotate grinding set, and the main lip of rubber is to rotation opposite grinding Set outer diameter is sealed.
No matter what kind of design structure taken, such rubber oil sea cannot all overcome the high speed fortune with engine crankshaft Turn, in high temperature operating conditions working environment, the fricting movement of rubber and rotary shaft also generates rapidly the abrasion under the conditions of high fever, Simultaneously because rubber friction coefficient is excessive, intensity is not high, and need to be increased rubber with spring seizes power, this just more increases The coefficient of friction of rubber, accelerates abrasion of the main lip of rubber in the relative motion seal process with rotary shaft, leads to dry combustion method Leakage phenomenon occurs for carbonization, this defect Now Domestic is external, regardless of the rubber crankshaft oil seal of any design structure, always without Method solves this rubber seal defect, this is also the basic reason place that rubber oil sea working life is not grown.
The oil seal for crankshaft of engine main lip seal face that also useful polytetrafluoroethylene material makes now, can this kind of polytetrafluoroethyl-ne Alkene crankshaft oil seal occurs again in work operating and the reversed problem defect of rubber crankshaft oil seal, i.e. modified Teflon, though Right high temperature resistance, crocking resistance, strength character, resistance to chemical corrosion is all better than rubber engine crankshaft oil seal performance, But as the polytetrafluoroethylene material of annular surface sealing lip, elasticity is very poor, is sealing work with engine crankshaft production relative motion Make in environment, can not be compensated automatically because of abrasion, leakage phenomenon will occur immediately so one periodically in seal operation Between can only lean on by diameter be less than crankshaft expanded in diameter seize power carry out wear-compensating, in the seal operation with crankshaft relative motion The middle purpose for prevent leakage, but virtually increase resistance in this way, while durability has poor, while because nonelastic, leads Cause is very poor with axis performance, bad to the followability of the bounce eccentric operating of crankshaft rotation, i.e., anti-eccentric ability is poor, while installing When because annular surface seal it is nonelastic, need sheath to carry out protection installation, while needing installation tool, if maintenance replacement in nothing Installation tool easily causes to damage annular surface seal face lip or wiredrawn edge when installation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of good airproof performance, facilitates installation, overcomes the eccentric ability of bounce strong New structural automobile crane oil sealing, can be with overcome the deficiencies in the prior art.
The technical scheme is that new structural automobile crane oil sealing, including section are two layers of stair-stepping annular Metallic framework is attached with vulcanized rubber overcoat on the vertical plane of lower layer's step of endless metal skeleton outer ring and bottom surface, The section that rubber system is attached on lower layer's step surface of endless metal skeleton inner ring and the vertical plane of upper layer step is the sealing of n shape Lips supporter is that section surface is equipped with filling-modified poly- the four of bending in the inner ring face of the sealing lips supporter of n shape in section Vinyl fluoride face seals lips, is that the inner ring lower section of the sealing lips supporter of n shape is provided with end face protection head in section, described Inner ring face middle section to the end face protection head thickness of sealing lips supporter is gradually increased.
Above-mentioned new structural automobile crane oil sealing is sealing lips and annular gold in filling-modified polytetrafluoroethylene (PTFE) face Belong to skeleton appear on the stage terrace lower end surface between be equipped with elasticity conveying rubber layer.
Above-mentioned new structural crankshaft oil seal is, is equipped with felt in the appear on the stage upper surface of terrace of endless metal skeleton and pays lip Or rubber pays lip,
Above-mentioned new structural automobile crane oil sealing is to pay lip in felt or rubber is paid above lip and its endless metal Nylon jacket, the lower end surface of nylon jacket and vulcanized rubber are cased on lower layer's step surface of skeleton outer ring and the vertical plane of upper layer step surface The upper end face contact of overcoat.
New structural shafting oil envelope above-mentioned is to be provided with centering pilot angle on end face protection head.Centering pilot angle is 60 degree
New structural shafting oil envelope above-mentioned is, filling-modified polytetrafluoroethylene (PTFE) face sealing lip on piece be provided with it is left-handed to Or dextrorotation to oil-recovery tank.
New structural shafting oil envelope above-mentioned is modification used in the filling-modified polytetrafluoroethylene (PTFE) face sealing lips Polytetrafluoroethylene (PTFE) is processed by the raw material mixed sintering of following mass parts:
20-30 parts of polybenzoate, 5-10 parts of glass fibres and 5-10 parts of graphite.
New structural shafting oil envelope above-mentioned is modification used in the filling-modified polytetrafluoroethylene (PTFE) face sealing lips Polytetrafluoroethylene (PTFE) is processed by the raw material mixed sintering of following mass parts:
20-30 parts of filling poly rouge, 5-7 parts of molybdenum disulfide, 5-10 parts of glass fibres.
Compared with the prior art, the invention has the following advantages that
Novel shaft seal oil sealing sealing lip of the present invention uses the filled polytetrafluoroethylene material that newly matches, and poly- four The characteristic that vinyl fluoride inherently has high-low temperature resistant, resistant to chemical etching and self-lubrication good, new formula make the elastic properties of materials more Well, self-lubricating property is more superior, and high temperature resistant and chemical attack ability are stronger；Filled polytetrafluoroethylene sealing lip and rubber bodies vulcanize Molding, integrates, and this structure composition rubber and filled polytetrafluoroethylene make whole in the good characteristic in sealing field A oil sealing has good automatic wear compensation ability and follows sealing performance with axis operating, does not need in assembling process biggish Interference, the good characteristic of the filled polytetrafluoroethylene material of special proportion, not will cause the heel and toe wear of axis in addition, and improve The service life of oil sealing and axis；Meanwhile this structure keeps the assembly of filled polytetrafluoroethylene sealing lip stronger, is not susceptible to Removing and breakage.
Inner ring face middle section to the end face protection head thickness of the sealing lips supporter is gradually increased, and such setting can To be positioned by the modified rubber polytetrafluoroethylene (PTFE) being bonded, modified Teflon end is avoided to tilt, so that it is guaranteed that changing Property teflon seal lip and crankshaft be face contact, further increase leakproofness.It is sealed in filling-modified polytetrafluoroethylene (PTFE) face Lips and endless metal skeleton appear on the stage terrace lower end surface between be equipped with elasticity conveying rubber layer, elasticity conveying rubber layer setting So that modified Teflon face sealing lips is that there is rubber in the region of skeleton handover, can further improve in this way The fixed stability of modified Teflon.It is provided with guide angle in seal lip, solves polytetrafluoroethyloil oil seals in this way At home, the installation of state's outer oil seal is easily damaged or damages main lip end face and the problem that causes oil sealing to be scrapped, and can make the present invention Oil sealing do not need protective case and specific purpose tool during the installation process, keep installation process simple and fast, and sealing lip is not rolled up The situation of side or breakage.
Modified Teflon sealing lip is connect with the sealing lips supporter that section is n shape, such N tee section structure May insure annular primary seal labial surface at work with axis, successfully solve the country, external polytetrafluoroethyloil oil seals are not It can be used for the bad defect problem of the bigger characteristic that rotates with the axis of rotating shaft eccentric rate.
Endless metal skeleton appear on the stage terrace upper surface be equipped with felt pay lip perhaps rubber pay lip felt pay lip or rubber Glue, which pays lip, has preferable sealing dust performance, it is ensured that and the dust outside air will not enter oil chamber at work, and with Metal support frame upper surface is bonded as one.
Felt pay lip or rubber pay on lip and its one layer of step surface of endless metal skeleton outer ring and quadruple board platform rank it is perpendicular It faces directly and is cased with nylon jacket, the setting of nylon jacket can just organize positioning in pairs with outer seal lip, that is, ensure coaxial essence when installation Exactness, and solve the generation of outer circle ageing of rubber failure phenomenon.Domestic and international felt now is prevented simultaneously and has paid lip oil sealing, in work Because of high temperature and the reason bad because of adhesive effect with metal support frame when making, the phenomenon that falling off under working condition is generated； And the setting of nylon jacket protects pair lip felt or rubber pair lip not to be weighed wounded and be pried injury when rubber pays lip installation.Filling is poly- The main labial surface of tetrafluoroethene sealing annular is equipped with bending, can increase main lip intensity in this way.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the portion the A enlarged drawing of Fig. 1.
Specific embodiment
Embodiment 1: the mounting framework of this oil sealing is that section is two layers of stair-stepping endless metal skeleton 1, in endless metal It is attached with vulcanized rubber overcoat 2 on the vertical plane of lower layer's step of 1 outer ring of skeleton and bottom surface, in 1 inner ring of endless metal skeleton Lower layer's step surface and upper layer step vertical plane on be attached with rubber system section be n shape sealing lips supporter 3, close The middle section inner peripheral surface for sealing lips supporter 3 is equipped with filling-modified polytetrafluoroethylene (PTFE) face and seals lips 4, in filling-modified polytetrafluoro Ethylene face sealing lips 4 and endless metal skeleton 1 appear on the stage terrace lower end surface between be equipped with elasticity conveying rubber layer 5, making When the main lip ring shape sealing cylinder 4 of filling-modified teflon seal and seal the contact surface of lips supporter 3 and vulcanize and be bonded as One can make up the low defect of filling-modified polytetrafluoroethylene material elasticity in this way.Sealing lips supporter 3 is designed to cut Face is the rubber material of n shape, may insure so filling-modified polytetrafluoroethylene (PTFE) face sealing lips 4 at work with axis, Successfully it is bad to cannot be used for the bigger characteristic that rotates with the axis of rotating shaft eccentric rate for domestic, the external polytetrafluoroethyloil oil seals of solution Defect problem.The inner ring lower section of the sealing lips supporter of n shape is provided with end face in section and protects head 7, the sealing lip Inner ring face middle section to end face protection 7 thickness of head of piece supporter 3 is gradually increased, and such structure may insure to filling-modified poly- The positioning of tetrafluoroethene face sealing lips 4, it is ensured that face basis avoids its end from tilting and change filling-modified polytetrafluoroethylene (PTFE) face Seal the contact surface of lips 4 and crankshaft.
It is further to be preferably dust-proof, endless metal skeleton 1 appear on the stage terrace upper surface be equipped with felt pay lip or Person's rubber pays lip 6, felt pay lip or rubber pay above lip 6 and its lower layer's step surface of 1 outer ring of endless metal skeleton and on Nylon jacket 10, the lower end surface of nylon jacket 10 and the upper end face contact of vulcanized rubber overcoat 2 are cased on the vertical plane of layer step surface, Nylon jacket 10 and outer seal lip 2 so just organizes positioning in pairs, that is, ensures coaxial accuracy when installation, and solve outer circle rubber The generation of glue ageing failure phenomenon.
Rubber arbitrary load is provided with certainly further in the inner ring lower end for the sealing lips supporter 3 that section is n shape Head 7 is protected in the dynamic end face to the heart, is provided with 60 degree of centering pilot angles 8 on end face protection head 7, can ensure that normal maintenance shape in this way Any installation accuracy under condition, solve polytetrafluoroethyloil oil seals be easily damaged or damage main lip end face in installation process and The problem of causing oil sealing to be scrapped, and replaced in maintenance mans and be not required to complicated installation tool in installation, it can arbitrarily install.In annular It is covered with vulcanization of rubber layer on the vertical plane of lower layer's step of 1 outer ring of metallic framework and bottom surface, oil sealing lubrication can be prevented in this way Oil is along table leakage phenomenon in metal support frame；Filling-modified polytetrafluoroethylene (PTFE) face sealing lips 4 on be provided with it is left-handed to or Dextrorotation to oil-recovery tank 9, the bending part of filling-modified teflon seal main lip ring shape sealing cylinder 4 is provided with R, is filling out It fills modified Teflon and seals main lip ring shape sealing cylinder 4 in the lower end that sealing lips supporter combines equipped with r, in this way may be used With reinforce sealing surface with axis and elastic working wear-compensating ability.
The present invention has also carried out the modified filling-modified polytetrafluoro to existing filled polytetrafluoroethylene material simultaneously Modified Teflon used in ethylene face sealing lips is made of the raw material of following mass parts: 20-30 parts of polybenzoate, 5-10 Part glass fibre and 5-10 parts of graphite.Or 20-30 parts of filling poly rouge, 5-7 parts of molybdenum disulfide, 5-10 parts of glass Fiber is processed into through mixed or sintering.
Tested through applicant, modified polytetrafluoroethylene (PTFE) compared with existing conventional polytetrafluoroethylene (PTFE) elastic properties of materials compared with Well, self-lubricating property is more superior, and high temperature resistant and chemical attack ability are stronger.
Major technique and performance indicator pass through GB/T14273-93, GB/T13871.1-2007 and GB/T13871.4- 2007 State Bureau of Technical Supervision's approval standards, qualification test, control of material test, dynamic test and additional low-temperature test:
1, hardness: shore 89
2, tensile strength/mpa27.4
3, elongation rate of tensile failure >=300%
4, it runs at high speed 3000-5000 revs/min of experiment, 150 DEG C of oil sealing temperature of core technology formula design production are continuous Operating does not leak for 2400 hours.
, do not occur within continuous work 2400 hours leakage (national standard 240 hours for qualification, see appendix 2), while to work Axis does not generate wear phenomenon.
The specific process of this product is as follows
(1) iron sheet punching skeleton: accurate compund die designed, designed processing, low cost are produced in enormous quantities；
(2) skeleton surface granosealing
(3) sinter molding is prepared in PTFE filling:
(4) lips surface active: physical modification, chemical modification；
(4) be integrally formed: the vulcanization of rubber, PTFE bonding, one-pass molding meet industrialization production.

Claims (3)

1. a kind of new structural automobile crane oil sealing, including section are two layers of stair-stepping endless metal skeleton (1), feature It is: is attached with vulcanized rubber overcoat (2) on the vertical plane of lower layer's step of endless metal skeleton (1) outer ring and bottom surface, The section that rubber system is attached on lower layer's step surface of endless metal skeleton (1) inner ring and the vertical plane of upper layer step is n shape Sealing lips supporter (3), sealing lips supporter (3) inner ring face in section surface be equipped with bending filling-modified poly- four Vinyl fluoride face seals lips (4), is equipped with end face protection head (7), the sealing in the inner ring end of sealing lips supporter (3) Inner ring face middle section to end face protection head (7) thickness of lips supporter (3) is gradually increased；It is close in filling-modified polytetrafluoroethylene (PTFE) face Envelope lips (4) and endless metal skeleton (1) appear on the stage terrace lower end surface between be equipped with elasticity convey rubber layer (5)；In annular gold Belong to skeleton (1) appear on the stage upper surface of terrace to be equipped with felt and pay lip or rubber and pay lip (6)；Lip is paid in felt or rubber pays lip (6) nylon jacket is cased on the vertical plane of lower layer's step surface and upper layer step surface of top and its endless metal skeleton (1) outer ring (10), the upper end face contact of the lower end surface of nylon jacket (10) and vulcanized rubber overcoat (2)；
Modified Teflon used in the filling-modified polytetrafluoroethylene (PTFE) face sealing lips is by two kinds of quality of following a or b The raw material mixed sintering of part is processed into:
A:20-30 parts of polybenzoate, 5-10 parts of glass fibres and 5-10 parts of graphite；
B:20-30 parts of filling poly rouge, 5-7 parts of molybdenum disulfide, 5-10 parts of glass fibres.
2. new structural automobile crane oil sealing according to claim 1, it is characterised in that: in end face protection head (7) It is provided with centering pilot angle (8), centering pilot angle (8) are 60 degree.
3. new structural automobile crane oil sealing according to claim 2, it is characterised in that: in filling-modified polytetrafluoroethyl-ne Alkene face sealing lips (4) on be provided with it is left-handed to or dextrorotation to oil-recovery tank (9).
CN201610692029.XA 2016-08-19 2016-08-19 A kind of new structural automobile crane oil sealing Active CN106122480B (en)

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Application Number Priority Date Filing Date Title
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CN106122480B true CN106122480B (en) 2018-12-21

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107882997B (en) * 2017-11-30 2024-01-19 浙江吉利新能源商用车有限公司 Engine oil seal
CN108087240B (en) * 2017-12-13 2024-02-09 重庆均利密封科技有限公司 Vulcanizing sealing structure of automobile air conditioner compressor and vulcanizing process thereof
US10844960B2 (en) 2018-12-04 2020-11-24 Caterpillar Inc. Crankshaft seal design

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CN101021271A (en) * 2007-03-15 2007-08-22 重庆恒驰科技信息咨询有限公司 Axle sealing oil-seal and seal lip material thereof
JP2007218302A (en) * 2006-02-15 2007-08-30 Sanden Corp Lip seal
CN201582009U (en) * 2009-12-23 2010-09-15 斯凯孚密封系统(芜湖)有限公司 Oil seal of engine crankshaft
CN201875142U (en) * 2010-12-14 2011-06-22 重庆智延科技发展有限公司 Skeleton oil seal
CN202091516U (en) * 2011-06-22 2011-12-28 重庆智延科技发展有限公司 Oil seal of automobile hub

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CN101492906B (en) * 2008-12-16 2011-01-26 洛阳双瑞特种装备有限公司 Composite intermediate layer sliding plate with filled polytetrafluoroethylene and method for preparing the same

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Publication number Priority date Publication date Assignee Title
JP2007218302A (en) * 2006-02-15 2007-08-30 Sanden Corp Lip seal
CN101021271A (en) * 2007-03-15 2007-08-22 重庆恒驰科技信息咨询有限公司 Axle sealing oil-seal and seal lip material thereof
CN201582009U (en) * 2009-12-23 2010-09-15 斯凯孚密封系统(芜湖)有限公司 Oil seal of engine crankshaft
CN201875142U (en) * 2010-12-14 2011-06-22 重庆智延科技发展有限公司 Skeleton oil seal
CN202091516U (en) * 2011-06-22 2011-12-28 重庆智延科技发展有限公司 Oil seal of automobile hub

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