CN103925367A - Crankshaft oil seal - Google Patents
Crankshaft oil seal Download PDFInfo
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- CN103925367A CN103925367A CN201410182030.9A CN201410182030A CN103925367A CN 103925367 A CN103925367 A CN 103925367A CN 201410182030 A CN201410182030 A CN 201410182030A CN 103925367 A CN103925367 A CN 103925367A
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Abstract
The invention provides a crankshaft oil seal. The crankshaft oil seal is provided with an oil seal lip. The oil seal lip comprises one or more main lip bodies with trapezoid cross sections, wherein the included angle between the hypotenuse and the center line of each trapezoid ranges from 2 degrees to 12 degrees. The crankshaft oil seal can be made into a traditional circular oil seal, a metal-stamped-flange integrated oil seal assembly, a plastic-flange integrated oil seal assembly, an aluminum-flange integrated oil seal assembly, an aluminum flange and metal-stamped frame riveting oil seal assembly and the like.
Description
Technical field
The present invention relates to a kind of oil sealing, be specifically related to a kind of crank shaft oil seal with self-lubricating function.Belong to technical field of sealing technology.
Background technique
Oil sealing is the mechanical component for oil sealing, it will in transmission part, need lubricated parts and the parts isolation of exerting oneself, be unlikely to allow oil seepage.The sealing of oil sealing is to form by the interference fit between flexible seal (leather, rubber, teflon, polychlorotrifluoroethylene or polyimide etc.) and running shaft.
At present, according to the difference of material used and occasion used, the structure of oil sealing is divided into monomer and two kinds of forms of combination, and the structure of monomer oil sealing is very simple, conventionally rounded.The structure of Combined grease seal is relatively complicated, by skeleton and lip material independent assortment, is formed, and Combined grease seal is usually used to meet special sealing needs.By classification of motions, there is rotation to use and past multiplexing oil sealing; By lock ring, be categorized as without spring type and have spring type; By textural classification, there are the dark skeleton of metal, outer metal frame, interior metal frame, open type; By the classification of lip type, there are haplocheilic type, lips type, compound lip type, special type (refluence oil seal).
Along with the progress of human civilization, can say that design, requirement and the improvement to oil sealing just never stopped, as the most important main lip of oil sealing position, just there is various variation.The effect of main lip is surperficial by last item at lip place, plays fluid-encapsulated effect.Material adopts ox-hide, NBR, HNBR, ACM, AEM, FKM, FPM, MVQ, SBR, EPDM, felt, PTFE and the combination of PTFE+ rubber+felt etc. more.
The ox-hide lip of early application is better, because of material restriction, and long-term industrialized production on a large scale, not enough in order to make up axle processing technique afterwards, circle is beated and the high defect of roughness, use close type rubber lip on a large scale, the working principle of rubber lip is: in microcosmos, rubber lip is that a large amount of rubber salient points forms, these salient points are high or low to be attached between the metallic bur power of axle, by self elasticity, hold axle surface tightly, form oil sealing function, but, in the high speed circular of axle, beat under spin friction, rubber lip is under the help of spring packing, not only with axle, move, also hold axial plane oil sealing tightly, the loss but rubber salient point can constantly be worn, finally cause incessantly oil of envelope.This kind of oil sealing structures that adopt are that skeleton/housing, skeleton/housing inner side are coated with lip structure (main lip and secondary lip), and are located at the spring in lip structure more; As shown in Figure 1, this kind of oil sealing comprises skeleton 1, and skeleton 1 inner side is coated with lip structure (main lip 2 and secondary lip 3), and is located at the spring 4 in lip structure, and main lip 2 is wedge shape, presses last item surface at lip place, plays fluid-encapsulated effect.This close type rubber lip good springiness, servo-actuated property is good, but temperature tolerance, weatherability, resistance to acids and bases are poor, and friction factor is large, easy high temperature ageing, being afraid of to scratch becomes rubber lip defect.
Along with the progress of axle processing technique, PTFE (teflon) horn shape lip is good with temperature tolerance, weather resisteant, resistance to acids and bases, and friction factor is little, long service life starts to become gradually main flow, but its poor flexibility, servo-actuated property is poor, is afraid of that the shortcoming scratching is its critical defect always.
This oil sealing with teflon horn shape lip; teflon seal oil sealing principle is: axle is beated little; the seize that can the meet PTFE requirement of beating; on microcosmic axle burr surface; by PTFE particulate, wear and tear, PTFE particulate is filled up between metallic bur power and is not lost, thereby forms PTFE protective layer; then realize the phase mutual friction of lip PTFE to axle surface PTFE layer, by oil drive back thread, form oil sealing function.This kind of many employings of oil sealing used the tubular thin sheet material of PTFE by rubber and the direct integrator of skeleton 1 before this, the tubular thin sheet material of PTFE is horn-like through pressing, pulling into, become oil sealing, horn-like PTFE can positive and negative two kinds of forms exist, and as shown in Fig. 2 a, Fig. 2 b, the lip of Fig. 2 a comprises main lip 2 and secondary lip 3, main lip 2 is reverse bell mouth shape,, the lip of Fig. 2 b comprises main lip, structure is forward bell mouth shape.
For the advantages of rubber and PTFE is got up, people have invented again the main bead structure of compound PTFE lamella on the main lip of rubber, but, touching and during work with being coupling, how many function combinations of half half PTFE of rubber understands some faulty place, so, people are blended in PTFE micro mist in rubber, realized to the full extent the performance complement of two kinds of materials, therefore occurred that self lubricity is good, resilient selflubricating rubber, this selflubricating rubber oil sea lip comprises main lip and secondary lip, the upper and lower thickness of main lip lip is identical and very thin, cause the edge iron of trimmer when repairing lip, main lip distortion, repair next main lip edge not in one plane, the oil return line of uniform and stable seize power and continuous effective cannot be provided for seize work.The shortcoming that the upper and lower thickness of main lip is identical and very thin is to cause the main cause of leakage of oil in enormous quantities.In addition, because the friction factor of selflubricating material itself is lower, so inside and outside integrative, take the circular self-lubricating oil seal of identical material, although reduced the friction factor of main lip, also reduced the friction factor that external diameter is held tightly in cavity, so can there is self-lubricating oil seal Autonomic Migration Framework problem out from cavity, be the another kind of reason that causes leakage of oil simultaneously.
From current oil seal structure, traditional spring close type rubber oil sea, although good springiness, the servo-actuated property of axle is good, eventually because friction factor is higher, and reduces its working life.Present up-to-date trial in the world also has the oil sealing of some gum lips, copy the horn-like monolithic of PTFE, imitate its principle work, although there be assisting by special additive, increased the self lubricity of rubber without reed horn lip, but eventually because friction factor is large, lip thickness is thin, elasticity is excessive and occur the situation of unstable operation.
Therefore, need to improve existing oil seal structure, to improve sealability and operating life.
Summary of the invention
The object of the present invention is to provide a kind of crank shaft oil seal, its good airproof performance, without spring design, molding rate is high, easy for installation, durable in use.
In order to realize the object of the invention, the invention provides a kind of crank shaft oil seal, it is provided with oil sealing lip, and described oil sealing lip comprises that one or several cross sections are trapezoidal main lip, and the angle of described trapezoidal hypotenuse and center line is 2-12 degree.
Wherein, the angle of described trapezoidal hypotenuse and center line is preferably 4-8 degree.
Described trapezoidal be isosceles trapezoid.
The lip edge thickness of described main lip, at 0.6-1.4mm, is preferably 0.9mm.
Described main lip is positive and negative both direction, i.e. upturned or downsagging.
Described upturned angle is 40-65 degree, preferably 55 degree.
The angle of described downsagging is 40-65 degree, preferably 55 degree.
The cross section of described several main lips can be for different gradients trapezoidal.
The material of described main lip can be the materials such as HNBR (hydrogenated butyronitrile glue), NBR (nitrile butadiene rubber), ACM (acrylate rubber), AEM (acrylate rubber), FPM (fluorine rubber), MVQ (methyl vinyl silicone rubber), SBR (styrene butadiene rubber), EPDM (ethylene propylene diene rubber), preferably adopts the material of self-lubricating type.
The outer surface of described main lip is provided with one or more oil return line.
Described oil return line is the form of unidirectional, two-way, wave, convolution or intersection.Described oil return line is dextrorotation or derotation, continuously or interruption, wire or planar.
Described oil sealing lip, except main lip, also comprises one or more secondary lip, and main lip is closely connected with axle surface respectively with secondary lip, forms multiple tracks protection, and described secondary lip can be used for preventing that sand, dirt are to invading in lubricant oil in axle.
The sectional shape of described secondary lip is trapezoidal or rectangular, is preferably isosceles trapezoid.
Described secondary lip and level are 0-75 degree angle.
Described secondary lip inner side, can have the oil return line identical or different with main lip equally, plays the effect of auxiliary oil sealing.
Described secondary lip internal surface is provided with one or more oil return line.
Described oil return line is the form of unidirectional, two-way, wave, convolution or intersection.Described oil return line is dextrorotation or derotation, continuously or interruption, wire or planar.
Described secondary lip material can be NBR, HNBR, ACM, AEM, FKM, FPM, MVQ, SBR, EPDM, felt, preferably can adopt the material of self-lubricating type.
Oil sealing lip of the present invention matches from different parts, and the crank shaft oil seal of formation can be used as traditional circular oil sealing, the synthetic oil seal assembly of metal stamping flange one, the synthetic oil seal assembly of plastic cement flange one, aluminium flange one synthetic oil seal assembly, aluminium flange and metal stamping skeleton riveted oil seal assembly and various flange sensor oil seal assemblies etc.
Crank shaft oil seal of the present invention also comprises a skeleton or/and flange is connected by adhesive layer with described oil sealing lip outside.
Certainly, can be also another form, between described oil sealing lip and described adhesive layer, be also provided with tie layer.Adhesive property between namely improving between lip and skeleton or flange by this tie layer between oil sealing lip and skeleton or flange, has avoided the separated of oil sealing and skeleton, thereby has guaranteed that oil sealing works effectively reliably.
The good airproof performance of crank shaft oil seal of the present invention, without spring design, molding rate is high, easy for installation, durable in use; Especially at the circle of bent axle, beat positive and negative 0.005 with interior use, for the material of oil seal lip, also take self-lubricating type as good, specifically, have the following advantages:
1. the main lip of crank shaft oil seal of the present invention has been cancelled the design of close type spring, saved spring cost, difficulty of processing and the production difficulty of packing spring groove when close type oil sealing is produced have been reduced, significantly reduced the reject ratio of product, weight reduction, environmental protection, energy-conservation, durable in use, effectively solves existing product defect; And main lip is designed to trapezoidal cross-section structure, its seize power and servo-actuated property are better more reliable; Also select suitable warpage angle and main lip edge thickness simultaneously, be more conducive to improve the sealing of oil sealing.
2. crank shaft oil seal of the present invention can be useful in that high rotating speed, low axle are beated, carry out work under the prerequisite of high finishingness, guarantees good sealing.
3. the present invention is that a kind of production is stable, cost, operation be simple, the Novel oil seal structure that the later stage is easy for installation, sealing is effective, the life-span is permanent.
4. oil sealing of the present invention is produced stable, cost, operation is simple, and the later stage is easy for installation, sealing is effective, the life-span is permanent, can adapt to various ways, applied range; Crank shaft oil seal of the present invention can be used as the modes such as traditional circular oil sealing, the synthetic oil seal assembly of metal stamping flange one, the synthetic oil seal assembly of plastic cement flange one, aluminium flange one synthetic oil seal assembly, aluminium flange and metal stamping skeleton riveted oil seal assembly and uses.
Accompanying drawing explanation
Fig. 1 is the partial schematic sectional view of existing close type oil seal lip;
Fig. 2 a, Fig. 2 b are respectively the partial schematic sectional view of the lip of existing two kinds of PTFE oil sealings;
Fig. 3 a is the partial schematic sectional view that the present invention has the crank shaft oil seal of reverse main lip;
Fig. 3 b is the partial schematic sectional view of the crank shaft oil seal with reverse main lip of the another kind of form of the present invention;
Fig. 4 a is the partial schematic sectional view that the present invention has the crank shaft oil seal of the main lip of forward;
Fig. 4 b is the partial schematic sectional view of the crank shaft oil seal with the main lip of forward of the another kind of form of the present invention;
Fig. 5 a is that the master that the present invention has a ferro-aluminum flange one crank shaft oil seal of reverse main lip looks schematic diagram;
Fig. 5 b is the partial schematic sectional view that the present invention has the ferro-aluminum flange one crank shaft oil seal of reverse main lip;
Fig. 6 is the partial schematic sectional view that the present invention has the ferro-aluminum flange one crank shaft oil seal of the main lip of forward;
Fig. 7 a is that the master of the crank shaft oil seal of the present invention's plastic cement flange sensing function with reverse main lip looks schematic diagram;
Fig. 7 b is the partial schematic sectional view of the crank shaft oil seal of the present invention's plastic cement flange sensing function with reverse main lip;
Fig. 8 is the partial schematic sectional view of the crank shaft oil seal of the present invention's plastic cement flange sensing function with the main lip of forward;
Fig. 9 a is that the master of the crank shaft oil seal of the present invention's aluminium flange with reverse main lip looks schematic diagram;
Fig. 9 b is the partial schematic sectional view of the crank shaft oil seal of the present invention's aluminium flange with reverse main lip;
Figure 10 is the cross-sectional schematic of the crank shaft oil seal of the present invention's aluminium flange with the main lip of forward;
Figure 11 a is that the master of the central layer crank shaft oil seal of the present invention's riveted joint aluminium flange with reverse main lip looks schematic diagram;
Figure 11 b is the partial schematic sectional view of the central layer crank shaft oil seal of the present invention's riveted joint aluminium flange with reverse main lip;
Figure 12 is the partial schematic sectional view of the central layer crank shaft oil seal of the present invention's riveted joint aluminium flange with the main lip of forward.
Embodiment
By embodiment, further describe the present invention below, be conducive to the understanding to the present invention and advantage thereof, better effects if, but described embodiment is only for illustrating the present invention rather than restriction the present invention.
Crank shaft oil seal of the present invention is provided with oil sealing lip, and oil sealing lip comprises that one or several cross sections are trapezoidal main lip, and the angle of described trapezoidal hypotenuse and center line is 2-12 degree; Be preferably as 4-8 degree angle, trapezoidal is isosceles trapezoid.
The lip edge thickness of described main lip, at 0.6-1.4mm, is preferably 0.9mm.
The direction of described main lip can downsagging also can be upturned, be positive and negative both direction, upturned angle can be 40-65 degree.The angle of downsagging is 40-65 degree.
When if main lip is several, its cross section can adopt the trapezoidal of different gradients.
The main lip of the present invention adopts after mould-forming, deburring machine maintenance lip, by trapezium structure, provide support power, ensure to the full extent the dimensional stability of lip circumference, while having avoided the production of the main lip deburring of existing rubber machine maintenance lip, because the upper and lower thickness of existing lip is identical and very thin, cause edge iron when repairing lip, the distortion of main lip, repairs the main lip edge that comes not in one plane, and the oil return line of uniform and stable seize power and continuous effective cannot be provided for seize work.
The present invention adopts the trapezoidal main lip design in cross section, makes winner's lip waist have very much elastic force, for main lip seize provides good seize power, has avoided the identical and very thin shortcoming of the upper and lower thickness of the main lip of existing rubber, sealing effect better, more reliable.In fact, these defects of the main lip of existing rubber, are also the main causes of their leakage of oils in enormous quantities.
The main lip material of the present invention can be the materials such as HNBR (hydrogenated butyronitrile glue), NBR (nitrile butadiene rubber), ACM (acrylate rubber), AEM (acrylate rubber), FPM (fluorine rubber), MVQ (methyl vinyl silicone rubber), SBR (styrene butadiene rubber), EPDM (ethylene propylene diene rubber), preferably adopt the rubber of self-lubricating type, can adopt on the market and directly to buy, also can adopt PTFE powder to carry out blending and modifying to required quality of rubber materials, certainly, for guaranteed performance is better, also can first to PTFE powder, carry out activation processing.
Secondly, the design of general main lip, outer surface is all provided with oil return line, and in the time of can allowing axle rotation, internal flow forms a kind of pumping effect with barometric pressure outside lip, and fluid is pushed back in chamber.When static, by the surface tension formation leakproof of liquid thickness.Thereby reduce to the full extent dry grinding, increase oil sealing working life.
According to the sense of rotation of axle, have one or more of simultaneous, by lip edge, started to the continuous clothoid of skeleton direction, recall oil stripping, according to the thickness of axle and skeleton Edge Distance, for effective oil sealing, more than during swirl type oil drive back thread seize, oil drive back thread must guarantee 4-6 bar, more than seize width 2mm simultaneously.Oil drive back thread can be according to the operating mode of axle, and described oil return line is the form of unidirectional, two-way, wave, convolution or intersection.Be dextrorotation or derotation, continuous or interruption.H is 0.2 millimeter.
Wherein the degree of depth of oil return line is that 0.1-0.4mm is good, and oil return line gap is that 0.4-1.2mm is good.
Secondary lip is in order to prevent introduced contaminants invasion, to scratch main lip, pollution medium, and secondary lip size design directly contacts all right with the diameter of axle, and angle must be dodged main lip, can be one or more, and angle can be identical or different.
Described oil sealing lip, except main lip, also comprises one or more secondary lip, and main lip is closely connected with axle surface respectively with secondary lip, forms multiple tracks protection, and described secondary lip can be used for preventing that sand, dirt are to invading in lubricant oil in axle.
The sectional shape of described secondary lip is trapezoidal or rectangular, is preferably isosceles trapezoid.
Described secondary lip and level are 0-75 degree angle.
Described secondary lip internal surface also can be provided with one or more oil return line as required.
Described oil return line is the form of unidirectional, two-way, wave, convolution or intersection.Described oil return line is dextrorotation or derotation, continuously or interruption, wire or planar.
Described secondary lip material can be NBR, HNBR, ACM, AEM, FKM, FPM, MVQ, SBR, EPDM, felt, preferably also can adopt the material of self-lubricating type, and it can adopt the processing mode same with main lip material to carry out.
When described main lip is applied on traditional circular oil sealing, external diameter material only limits to use conventional rubber material, according to different purposes, can be the different materials such as NBR, HNBR, ACM, AEM, FKM, FPM, MVQ, SBR, EPDM, can not increase selflubricating material, otherwise, when oil sealing external diameter is embedded in oil sealing flange, can lose the tensioner effect to cavity because external diameter has lubricating function, oneself skids off cavity.
Crank shaft oil seal of the present invention also comprises a skeleton or/and flange is connected by adhesive layer with described oil sealing lip outside.
Certainly, can be also another form, while adopting selflubricating rubber such as oil sealing lip, between described oil sealing lip and described adhesive layer, be also provided with tie layer.Namely between oil sealing lip and skeleton or flange, by this tie layer, improve the adhesive property between the two, avoided the separated of oil sealing and skeleton, thereby guaranteed oil sealing work effectively reliably.
Tie layer can adopt and can guarantee that the material that oil sealing lip and skeleton or flange are bonded together makes, such as conventional rubber material (NBR, HNBR, ACM, AEM, FKM, FPM, MVQ, SBR, EPDM etc.).
For flange of the present invention, be provided with a circle sealing tree lace thereon, its cross section structure can be the asymmetric triangle in symmetric triangular type, deflection axle center, can be one, also can be many.
On described flange, be yet provided with several positioning holes, for ensureing the effect of oil sealing central position degree.
On described flange, be also provided with several screw via hole and screw holes, play the effect that helps to install, lock flange, other part of help loading.
On described flange, be also provided with several base angle screw holes, play the radially effect of locking.
On described flange, be also provided with the sensing system of ABS encoder and reception data, for adding up rotary shaft rotating speed.
Oil sealing lip of the present invention matches from different parts, and the crank shaft oil seal of formation can be used as traditional circular oil sealing, the synthetic oil seal assembly of metal stamping flange one, the synthetic oil seal assembly of plastic cement flange one, aluminium flange one synthetic oil seal assembly, aluminium flange and metal stamping skeleton riveted oil seal assembly and various flange sensor oil seal assemblies etc.
According to different application occasion, the concrete different structure feature of crank shaft oil seal of the present invention, is specifically described below in conjunction with figure.
The material of each parts that wherein, the present invention relates to all can be bought or according to existing method, prepare voluntarily.Adhesive layer for connecting framework or flange and oil sealing lip does not all illustrate in the drawings.
Embodiment 1
Fig. 3 a is the partial schematic sectional view that the present invention has the crank shaft oil seal of reverse main lip; As shown in Figure 3 a, described crank shaft oil seal is a circular oil sealing, and described crank shaft oil seal comprises oil sealing lip and skeleton 1 with being connected outside oil sealing lip.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 55 degree angles (α is 55 degree) with level, and the sectional shape of main lip is the isosceles trapezoid of 8 degree inclined-planes (β is 8 degree).
Now, θ angle is right angle.The lip edge thickness A of described main lip 2 is 0.9 millimeter.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.2 millimeter.Gap L is 0.8 millimeter.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 55 degree angles (α 1 is 55 degree) with level.
The skeleton 1 of this kind of crank shaft oil seal is the annulus of inverted U for cross section, at least one end is coated by oil sealing lip outside for it, in other words, skeleton is embedded in oil sealing lip and plays a supporting role, between the two, by adhesive layer, be fixedly connected with (not shown), general adhesive layer adopts super large molecule alkane coupling agent class intermediate as bonding glue.
The material of oil sealing lip is FPM (fluorine rubber); Skeleton 1 is carbon steel skeleton.
Its preparation process is as follows: first this oil sealing will develop skeleton press tool according to frame configuration, goes out after carbon steel skeleton by oil removing, rust cleaning, cementing, Procuring stand-by; Its less important exploitation rubber mold, in the rubber mold of vulcanizer, synthesizes the rubber having refined by High Temperature High Pressure, after synthesizing, by trimmer deburring, obtain finished product.
During use, oil sealing is first fitted in flange cavity, then according to location, flange is contained on body, axle is penetrated to oil seal lip simultaneously, need asbestos lining sealing between flange and body, flange and body are by screw locking.
Embodiment 2
If Fig. 4 a is the partial schematic sectional view that the present invention has the crank shaft oil seal of the main lip of forward.As shown in Fig. 4 a, described crank shaft oil seal is a circular oil sealing, and described crank shaft oil seal comprises oil sealing lip and skeleton 1 with being connected outside oil sealing lip.
Oil sealing lip comprises main lip 2 ' and secondary lip 3.Main lip 2 ' is forward, is downsagging shape, is 55 degree angles (γ is 55 degree) with level, and the sectional shape of main lip 2 ' is that gradient is the isosceles trapezoid of 8 degree (6 is 8 degree).
Now, θ angle is right angle.B thickness is 0.9 millimeter.
Main lip 2 ' outer surface is provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.2 millimeter.Gap L is 0.8 millimeter.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 55 degree angles (α 1 is 55 degree) with level.
The skeleton 1 of this kind of crank shaft oil seal is the annulus of inverted U for cross section, and at least one end is coated by oil sealing lip outside for it, and in other words, skeleton is embedded in oil sealing lip and plays a supporting role.
The material of oil sealing lip is FPM (fluorine rubber); Skeleton 1 is carbon steel skeleton.
Embodiment 3
Fig. 3 b is the partial schematic sectional view of the crank shaft oil seal with reverse main lip of the another kind of form of the present invention; As shown in Figure 3 b, described crank shaft oil seal is a circular oil sealing, and described crank shaft oil seal comprises skeleton 1 and oil sealing lip, and skeleton one side is connected with oil sealing lip outside by tie layer 6.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 55 degree angles (α is 55 degree) with level, and the sectional shape of main lip is the isosceles trapezoid of 8 degree inclined-planes (β is 8 degree).
Now, θ angle is right angle.The lip edge thickness A of described main lip 2 is 0.9 millimeter.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.2 millimeter.Gap L is 0.8 millimeter.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 55 degree angles (α 1 is 55 degree) with level.
The skeleton 1 of this kind of crank shaft oil seal is the annulus of inverted U for cross section, and its one end is connected with oil sealing lip by tie layer 6.
When oil sealing lip adopts the strong selflubricating material of greasy property, tie layer 6 is in order to realize the positive engagement of selflubricating rubber and skeleton, avoided the separated of self-lubricating oil seal lip and skeleton, for the work of self-lubricating oil seal lip provides solid and reliable support force, and then guarantee that it can more long-term, effective, safe and reliable work.Tie layer 6 can adopt to be made as the material of fluorine rubber one class, fluorine rubber one side can be cross-linked with the selflubricating rubber of oil sealing lip, another side can pass through the molecular bond generation cross-linking reaction on adhesive layer (super large molecule alkane coupling agent class intermediate) and framework material surface, reaches more solid and reliable joint.
Such as the material of the oil sealing lip FPM (fluorine rubber) that is selflubricating; The FPM of this kind of selflubricating processes polytetrafluoroethylene powder (being the polytetrafluoroethylene powder through sodium-naphthalene solution activation processing) to form with FPM blend, has both had good wear-resisting property, has again good elasticity.
But for the crank shaft oil seal of this structure, when oil sealing lip adopts selflubricating material, the migration when preventing that oil sealing from working in cavity, the material of the outer radius portion 13 of oil sealing can adopt the rubber material different from lip, or non-selflubricating rubber material.
The outer radius portion 13 of oil sealing be adopted as ACM (acrylate rubber).
Skeleton 1 is carbon steel skeleton.
Its preparation process is as follows: first this oil sealing will develop skeleton press tool, goes out after carbon steel skeleton by oil removing, rust cleaning, cementing, Procuring stand-by; Its less important exploitation rubber mold, in the rubber mold of vulcanizer, is placed on the selflubricating rubber having refined and non-selflubricating rubber respectively in the lip die cavity different with external diameter, by High Temperature High Pressure, synthesizes, synthetic after, by trimmer deburring, obtain finished product.
During use, oil sealing is first fitted in flange cavity, then according to location, flange is contained on body, axle is penetrated to oil seal lip simultaneously, need asbestos lining sealing between flange and body, flange and body are by screw locking.
Embodiment 4
If Fig. 4 b is the partial schematic sectional view of the crank shaft oil seal with the main lip of forward of the another kind of form of the present invention.As different from Example 3, main lip 2 ' is forward, downsagging.
Embodiment 5
Fig. 5 a is that the master that the present invention has a ferro-aluminum flange one crank shaft oil seal of reverse main lip looks schematic diagram; Fig. 5 b is the partial schematic sectional view that the present invention has the ferro-aluminum flange one crank shaft oil seal of reverse main lip; As shown in Fig. 5 a, 5b, described ferro-aluminum flange one crank shaft oil seal comprise oil sealing lip with by tie layer 6 and the flange 7 being connected outside oil sealing lip.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 65 degree angles with level, and the sectional shape of main lip 2 is that gradient is the trapezoidal of 4 degree.The lip edge thickness A of main lip 2 is 0.6 millimeter.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.4 millimeter.Gap L is 1.0 millimeters.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 35 degree angles with level.
The material of oil sealing lip is the EPDM (ethylene propylene diene rubber) of selflubricating; The EPDM (ethylene propylene diene rubber) that tie layer 6 materials are non-selflubricating.
Flange 7 is the iron flange with positioning hole, screw hole and mounting plane.
Flange 7 inner sides are connected with oil sealing lip outside by one deck tie layer 6.
Flange 7 is provided with the sealing tree lace 8 of 2 circle symmetric triangular types.
On flange 7, be also provided with 6 positioning holes, for ensureing the effect of oil sealing central position degree.
On flange 7, be also provided with 2 screw via holes and 2 screw holes, play the effect that helps to install, lock flange, other part of help loading.
The locking mechanism of screw via hole and screw hole, base angle screw hole, lock screw is the most simple and effective means of fixation.
Its preparation process is as follows: first this oil sealing will develop flange punching mould tool according to flange arrangement, goes out after iron flange by oil removing, rust cleaning, cementing, Procuring stand-by; Its less important exploitation rubber mold, is placed on the selflubricating rubber having refined in the rubber mold die cavity of vulcanizer, synthesizes by High Temperature High Pressure with iron flange, after synthesizing, by trimmer deburring, obtains finished product.
During use, according to positioning hole position, flange is contained on body, axle is penetrated to oil seal lip simultaneously, between flange and body, by anaerobism silicone adhesive, seal, flange and body are by screw locking.
Embodiment 6
Fig. 6 is the partial schematic sectional view that the present invention has the ferro-aluminum flange one crank shaft oil seal of the main lip of forward; As different from Example 5, main lip 2 ' is forward, downsagging.
Embodiment 7
Fig. 7 a is that the master of the crank shaft oil seal of the present invention's plastic cement flange sensing function with reverse main lip looks schematic diagram; Fig. 7 b is the partial schematic sectional view of the crank shaft oil seal of the present invention's plastic cement flange sensing function with reverse main lip; As shown in Fig. 7 a, 7b, self-oiling crankshaft oil sealing comprises flange 7, the oil sealing lip matching by tie layer 6 with flange inner ring, ABS encoder 9, the sensor 10 corresponding with encoder 9.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 40 degree angles with level, and the sectional shape of main lip 2 is the isosceles trapezoid of gradient 10 degree.The lip edge thickness A of main lip 2 is 1.2 millimeters.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.1 millimeter.Gap L is 0.4 millimeter.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 75 degree angles with level.
The material of oil sealing lip is the AEM (acrylate rubber) of selflubricating; The AEM (acrylate rubber) that tie layer 6 materials are non-selflubricating.
ABS encoder 9 is inverted Ushaped loop, and back-off is in secondary lip 3 tops, and one end of ABS encoder 9 is located on described flange 7.
Sensor 10 comprises sensor chip and data line and output port, and data line and output port be integral injection molding when flange is synthetic, and sensor chip is embedded in flange, and sensor 10 plays the effect that transmits rotary speed information.
On flange 7, be also provided with and be positioned at outside sensor 10 chips, be overshooting shape along the flange inner ring flange back-up ring 11 of a week, it does not contact with encoder, reduces friction, for sensor chip is received information, reading provides enclosed environment.
Flange 7 is provided with the sealing tree lace 12 of 2 circle symmetric triangular types.
On flange 7, be also provided with 6 positioning holes, for ensureing the effect of oil sealing central position degree.
On flange 7, be also provided with 3 screw via holes and 3 screw holes, play the effect that helps to install, lock flange, other part of help loading.
On described flange 7, be also provided with 2 base angle screw holes, play the radially effect of locking.
The locking mechanism of screw via hole and screw hole, base angle screw hole, lock screw is the most simple and effective means of fixation.
Its preparation process is as follows: first prepare the required hardware in screw hole position, exploitation flange is produced required plastic mould, and hardware incorporated plastic cement flange in plastic mold is stand-by; Exploitation rubber pattern, in the rubber mold of vulcanizer, is placed on selflubricating rubber refine and silicone rubber respectively lip and seals in the different die cavity of tree lace, synthesizes by High Temperature High Pressure with plastic cement flange, and after synthesizing, by trimmer deburring, acquisition finished product.Exploitation stamping die, made encoder skeleton is stand-by by oil removing, rust cleaning, cementing, Procuring; Its less important exploitation rubber mold completes the magnetic rubber having refined in the rubber pattern of exploitation by the vulcanizer pressurization composite coding device deburring of heating, add magnetic information, and flange is implanted induction chip, and general assembly completes.
Install and directly by positioning hole, locate, axle is through lip, and screw is locked it and body.
Embodiment 8
Fig. 8 is the partial schematic sectional view of the crank shaft oil seal of the present invention's plastic cement flange sensing function with the main lip of forward; As shown in Figure 8, as different from Example 7, main lip 2 ' is forward, downsagging.
Embodiment 9
Fig. 9 a is that the master of the crank shaft oil seal of the present invention's aluminium flange with reverse main lip looks schematic diagram; Fig. 9 b is the partial schematic sectional view of the crank shaft oil seal of the present invention's aluminium flange with reverse main lip; As shown in Fig. 9 a, 9b, the self-oiling crankshaft oil sealing of described aluminium flange comprise oil sealing lip with by tie layer 6 and the flange 7 being connected outside oil sealing lip.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 50 degree angles with level, and the sectional shape of main lip 2 is the trapezoidal of gradient 8 degree.The lip edge thickness A of main lip 2 is 0.9 millimeter.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.2 millimeter.Gap L is 0.8 millimeter.
The sectional shape of described secondary lip 3 is isosceles trapezoid.
Described secondary lip 3 is 45 degree angles with level.
The material of oil sealing lip is the SBR (styrene butadiene rubber) of selflubricating; The SBR (styrene butadiene rubber) that connection material is non-selflubricating.
Flange 7 is the aluminium flange with positioning hole, screw hole and mounting plane.
Its preparation process is as follows: first this oil sealing will develop aluminium flange cast-aluminum die, processes positioning hole, screw hole and mounting plane after casting out aluminium flange on CNC, stand-by by oil removing, rust cleaning, cementing, Procuring; Its less important exploitation rubber mold, is placed on the selflubricating rubber having refined in the rubber mold die cavity of vulcanizer, synthesizes by High Temperature High Pressure with aluminium flange, after synthesizing, by trimmer deburring, obtains finished product.
During use, according to positioning hole position, aluminium flange is contained on body, axle is penetrated to oil seal lip simultaneously, between flange and body, by anaerobism silicone adhesive, seal, aluminium flange and body are by screw locking.
Embodiment 10
Figure 10 is the partial schematic sectional view of the crank shaft oil seal of the present invention's aluminium flange with the main lip of forward; As shown in figure 10, as different from Example 9, main lip 2 ' is forward, downsagging.
Embodiment 11
Figure 11 a is that the master of the central layer crank shaft oil seal of the present invention's riveted joint aluminium flange with reverse main lip looks schematic diagram; Figure 11 b is the partial schematic sectional view of the central layer crank shaft oil seal of the present invention's riveted joint aluminium flange with reverse main lip; As shown in Figure 11 a, 11b, the central layer self-oiling crankshaft oil sealing of described riveted joint aluminium flange comprises oil sealing lip, aluminium flange, central layer.
Oil sealing lip comprises main lip 2 and secondary lip 3.Main lip 2 is oppositely, is to tilt upward curvedly, is 55 degree angles with level, and the sectional shape of main lip 2 is the trapezoidal of gradient 12 degree.
Main lip 2 outer surfaces are provided with an oil return line 5, and oil return line is shaped as the continuous helix from inside to outside of wall scroll.
The depth H of oil return line 5 is 0.2 millimeter.Gap L is 0.8 millimeter.
The sectional shape of described secondary lip 3 is rectangular, is 0 degree angle with level, and material is felt.
From Figure 11 b, at secondary sublabial, there is as seen the support 14 of a similar secondary lip, for supporting the flatness of the secondary lip of felt.
Described central layer 15 is for the synthesis of oil sealing lip and seal tree lace, and rivets material carbon steel with aluminium flange 7.
The ACM (acrylate rubber) that main lip 2 materials of oil sealing lip are selflubricating, secondary lip 3 is felt; Tie layer 6 materials are ACM (acrylate rubber).
Flange 7 is with positioning hole, the aluminium flange of screw hole for riveting.
Its preparation process is as follows: first this oil sealing will develop aluminium flange cast-aluminum die, processes positioning hole, screw hole and mounting plane after casting out aluminium flange on CNC.Also to develop skeleton press tool, go out after carbon steel central layer by oil removing, rust cleaning, cementing, Procuring stand-by; To develop rubber mold simultaneously, by the ACM (acrylate rubber) of the selflubricating rubber having refined and non-selflubricating in the rubber mold of vulcanizer, be placed on respectively in the lip die cavity different with sealing tree lace, synthesize by High Temperature High Pressure with central layer, after synthetic, by trimmer deburring, then glue the secondary lip of felt of punching press gained, be riveted on aluminium flange.
Install and directly by positioning hole, locate, axle is through lip, and screw is locked it and body.
Embodiment 12
Figure 12 is the partial schematic sectional view of the central layer self-oiling crankshaft oil sealing of the present invention's riveted joint aluminium flange with the main lip of forward.As shown in figure 12, as different from Example 11, main lip 2 ' is forward, downsagging.
That oil sealing of the present invention is produced is stable, cost, operation are simple, and the later stage is easy for installation, sealing is effective, the life-span is permanent, can adapt to various ways, applied range; Crank shaft oil seal of the present invention can be used as the modes such as traditional circular oil sealing (external diameter is used non-selflubricating rubber), the synthetic oil seal assembly of metal stamping flange one, the synthetic oil seal assembly of plastic cement flange one, aluminium flange one synthetic oil seal assembly, aluminium flange and metal stamping skeleton riveted oil seal assembly and uses.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. a crank shaft oil seal, is characterized in that, it is provided with oil sealing lip, and described oil sealing lip comprises that one or several cross sections are trapezoidal main lip, and the angle of described trapezoidal hypotenuse and center line is 2-12 degree.
2. crank shaft oil seal according to claim 1, is characterized in that, the angle of described trapezoidal hypotenuse and center line is 4-8 degree.
3. crank shaft oil seal according to claim 1 and 2, is characterized in that, the lip edge thickness of described main lip is at 0.6-1.4mm.
4. crank shaft oil seal according to claim 1 and 2, is characterized in that, the upturned or downsagging of described main lip.
5. crank shaft oil seal according to claim 4, is characterized in that, described upturned angle is 40-65 degree; The angle of described downsagging is 40-65 degree.
6. according to the crank shaft oil seal described in claim 1-5 any one, it is characterized in that, the outer surface of described main lip is provided with one or more oil return line.
7. crank shaft oil seal according to claim 1, is characterized in that, described oil sealing lip, except main lip, also comprises one or more secondary lip.
8. crank shaft oil seal according to claim 7, is characterized in that, the sectional shape of described secondary lip is isosceles trapezoid or rectangular.
9. crank shaft oil seal according to claim 1, is characterized in that, described crank shaft oil seal also comprises a skeleton or/and flange is connected by adhesive layer with described oil sealing lip outside.
10. crank shaft oil seal according to claim 9, is characterized in that, between described oil sealing lip and described adhesive layer, is also provided with tie layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410182030.9A CN103925367A (en) | 2014-05-04 | 2014-05-04 | Crankshaft oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410182030.9A CN103925367A (en) | 2014-05-04 | 2014-05-04 | Crankshaft oil seal |
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| CN103925367A true CN103925367A (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410182030.9A Pending CN103925367A (en) | 2014-05-04 | 2014-05-04 | Crankshaft oil seal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110678678A (en) * | 2017-04-07 | 2020-01-10 | 德纳汽车***集团有限责任公司 | Sealing member with integrally formed ribs |
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| JPH09159029A (en) * | 1995-12-12 | 1997-06-17 | Kubota Corp | Oil seal device of engine |
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| CN201925477U (en) * | 2010-11-22 | 2011-08-10 | 青岛开世密封工业有限公司 | Oil seal for wheel hub |
| CN103742650A (en) * | 2013-12-27 | 2014-04-23 | 哈尔滨东安实业发展有限公司 | Installation-free integrated crankshaft oil seal assembly |
| CN203823071U (en) * | 2014-05-04 | 2014-09-10 | 董波 | Crankshaft oil seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4643438A (en) * | 1986-03-18 | 1987-02-17 | Wankel Gmbh | Axial oil seal of a rotary piston engine |
| CN2267346Y (en) * | 1995-02-25 | 1997-11-12 | 北京轧机轴承公司 | Sealing ring of rolling mill |
| JPH09159029A (en) * | 1995-12-12 | 1997-06-17 | Kubota Corp | Oil seal device of engine |
| CN2554426Y (en) * | 2002-06-28 | 2003-06-04 | 重庆川东减震制造有限公司 | Dust-proof sealing washer of shock absorber |
| CN201367950Y (en) * | 2008-11-27 | 2009-12-23 | 奇瑞汽车股份有限公司 | Structure for crankshaft oil seal of automobile engine |
| CN201925477U (en) * | 2010-11-22 | 2011-08-10 | 青岛开世密封工业有限公司 | Oil seal for wheel hub |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110678678A (en) * | 2017-04-07 | 2020-01-10 | 德纳汽车***集团有限责任公司 | Sealing member with integrally formed ribs |
| CN110678678B (en) * | 2017-04-07 | 2022-04-15 | 德纳汽车***集团有限责任公司 | Sealing member with integrally formed ribs |
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