CN105209804A - Sealing means and sealing structure comprising the same - Google Patents
Sealing means and sealing structure comprising the same Download PDFInfo
- Publication number
- CN105209804A CN105209804A CN201480017886.9A CN201480017886A CN105209804A CN 105209804 A CN105209804 A CN 105209804A CN 201480017886 A CN201480017886 A CN 201480017886A CN 105209804 A CN105209804 A CN 105209804A
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- CN
- China
- Prior art keywords
- mortise
- tenon
- groove part
- sealing
- seal arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—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
- F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
- F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
Abstract
The present invention relates to a sealing means (20) for sealing between a shaft (12) and an aperture (130) of a cover part (13), comprising: a circumferential rotational-sealing member (21) fitted around the shaft passing through the aperture of the cover part; and an adjustment face-sealing member (22) attached to the circumferential rotational-sealing member and fixedly connected to the cover part, wherein the adjustment face-sealing member comprises a mortise (220) and a tenon (230) engaged with each other in a sealing manner, and an annular mortise groove portion (221) of the mortise and an annular tenon protrusion portion (231) of the tenon are configure to be capable of sliding relative to each other in an engagement plane so as to allow the sealing means to remain coaxially aligned with the shaft. The present invention also relates to a sealing structure with the sealing means.
Description
Technical field
The present invention relates to a kind of seal arrangement, and relating to a kind of seal arrangement of the housing lid for having through hole particularly, this through hole is arranged for the running shaft treated by sealing, and this housing lid is such as sealing a housing, such as, the crankcase of vehicle motor or engine body.
Background technique
The available engine protecgulum (crankcase end cap) of motor is made up of the material identical with the material of crankcase main body or engine body usually, or make by with the material that the material of crankcase main body or engine body has an identical thermal expansion coefficient (CET), so that guarantee the axis of the dynamic sealing element for sealing bent axle in whole design operation temperature range always with bent axle coaxial alignment, avoid the out-of-alignment risk between the axis of dynamic sealing element and the axis of bent axle, thus the lateral load of imparting on dynamic sealing element caused due to thermal distortion is minimized, thus Leakage prevention and possible sealed-for-life infringement.Such as, the engine front cover be made of plastics expands with the speed of several times larger than the engine body be made up of metal (usual cast iron or aluminum alloy); The mismatch of the CET between plastics and engine body material will make, and when when the diameter opposite side of the direction pull-up dynamic seal apparatus away from bent axle surface, the part of seal arrangement is more difficult towards the pressing of bent axle surface.Unbalanced load on seal arrangement causes the lateral load mentioned herein.Be applied to by engine front cover the lateral load be arranged on bent axial seal arrangement accelerate by making arranging the wearing and tearing being used for the sealing lip of the dynamic sealing element of bent axle and the wearing and tearing of quickening and last seal failure may be caused.On the diameter opposite side of seal arrangement, the load that the sealing lip of dynamic sealing element reduces even may cause oil to leak before sealing lip physical abrasion, and this is mainly because the seal load of deficiency causes.In fact, crankcase main body or engine body are usually made of metal.Therefore, in view of the above-mentioned potential failure mode of seal arrangement, there is the material of different CET (such as by the other materials except metal or by from the metal of crankcase main body or engine body, lightweight material, such as, plastics) manufacture engine front cover and be considered to unactual or infeasible always.
Fig. 6 shows by a known sealing MANUFACTURER---the modularization Seal Design for solving the misalignment issues between center seal line and crankshaft axis that Bruss company produces, wherein this modularization Seal Design is a kind of bolton seal modules, comprise: pedestal 100, it is made up of hard plastics; Flexible wavy S shape elastomer 200, it to be wrapped by molded (over-mold) to this pedestal and to comprise a dynamic sealing lip, and this dynamic sealing lip is intended to the dynamic rotary Sealing serving as bent axle; Flat elastic washer 300, its be disposed in this pedestal in the face of engine front cover coupling face on, this packing ring is intended to seal relative to the modularization Sealing of engine front cover, and wherein engine front cover must be equipped with clamping metal female thread to install from outside and through the assembling screw of this pedestal to receive.This female thread must be designed to prevent from rotating to allow to tighten the assembling screw from outside.(thinning due to constant compressive load) is out of shape in order to prevent the compression creep of the hard plastics pedestal 100 owing to causing from the clamping load of bolt, an incompressible pad of metal is needed, to guarantee the all-metal load path for bolt load at each bolt position place.On the contrary, if plastics are subject to the bolt load of a part, then will there is creep strain, cause the moment loss at bolted joints place.
In this modularization Seal Design, the elastomeric material in ' S ' type ripple will be subject to the change rigidity in the operating temperature range (usually using the scope from-40 DEG C to 150 DEG C in engine applications, for example) of sealing.Misalignment between center seal line and shaft centre line will cause the lateral load be applied in the seal.Particularly when low-temperature operation, the rigidity of elastomeric material becomes higher, and lateral load also becomes higher, causes the sealing wear of the acceleration at described lip place.Therefore, the subject matter of this modularization Seal Design is it is to temperature change sensitivity.Artificer can expect, between hypothermic phase, reduce lateral load by reducing the elastomeric rigidity of ripple.When having lower rigidity, likely along with the past of time, elastomer can cause torsion creep relative to the torsional friction of bent axle.This can cause reversing with clock spring similar " rolling tightly (the wind-up) " situation of the mode that is wound around, and this causes the elastomeric long-term creep distortion of ripple.In addition, the material for waveform elastic body of selection must be identical with the material for dynamic lip seals.Because optimal material performance between waveform elastic body and dynamic lip seals may be different, meeting the demands of waveform elastic body must be made to compromise with some performance of dynamic lip seals.In addition, this modularization Seal Design bolts assemblies is to engine front cover, and assembly process is quite complicated and working strength is large.
From the known a kind of housing lid for vehicle startup engine housing of document WO2005/003604A1, wherein this housing lid has the through hole of bent axle for extending from enclosure interior, comprise the reinforcement flange of a light-weight metal die casting and the sealing flange of a polymer material, this reinforcement flange is removably connected to sealing flange by hasp lock (snaplock).Dynamic sealing element is fixed to sealing flange at the inner circumferential side place in the face of bent axle, and static sealing element is fixed to sealing flange at the outer circumferential sides place in the face of housing; In the external frame of sealing flange arrange a recess, static sealing element by this recess with shape coordinate and immovable mode is connected to sealing flange.Sealing flange can be made up of nonmetallic material or light-weight metal (such as, polyesteramine, polyphenylene sulfide and polyphthalamide).Therefore, in order to corresponding application, the material of housing lid can be selected before the mounting and the manufacture of the individual part of housing lid can be performed independently of one another.But in housing lid disclosed in document WO2005/003604A1, reinforcement flange and sealing flange are coordinated by power and/or shape coordinates and/or material fit is connected.The difference of the thermal expansion coefficient of the material of the different piece of housing lid still may cause the lateral load on dynamic sealing element, thus causes the sealability of reduction.
The invention is intended to overcome hinder by from crankcase main body or that material that the material of engine body has different CTE manufactures in the above-mentioned design weakness of engine front cover is one or more.
Summary of the invention
Target of the present invention is to provide a kind of seal arrangement for the sealing between axle and the hole of cap, what sealing device can be guaranteed is, by eliminate or reduce seal arrangement, the side loading that is applied on this axle by the distortion caused by bent axle main body or the rates of thermal expansion of the different materials between engine body from cap or the different of cooling meat rate, the seal arrangement being attached to cap is always aimed at this axle with coaxial manner, maintains the sealability between this cap and this axle.By means of seal arrangement of the present invention, no longer require that the manufactured materials of cap has same CTE with crankcase main body or engine body.
Target of the present invention is realized by a kind of seal arrangement for sealing between axle and the hole of cap, and sealing device comprises: a circumference rotating sealing member, is assembled in around the axle through this hole; And an adjustment face sealing component, be attached to this circumference rotating sealing member and be fixedly connected to this cap; Wherein this adjustment face sealing component comprises the mortise and a tenon that are engaged with each other in a sealing fashion, and the annular tenon protuberance of the annular mortise groove part of this mortise and this tenon relative to each other can slide in a composition plane, to allow sealing device to keep and this axle coaxial alignment.
Preferably, mortise groove part is by having form of slots that medium-hard material (such as, fluoroelastomer (FKM)) makes.Preferably, there is for the material of this mortise groove part the Shore A durometer hardness of 60-90.The mortise groove part be made up of FKM is designed to the friction significantly reducing to be moved by the relative sliding between mortise groove part and tenon protuberance generation.
Preferably, tenon protuberance is provided with an annular ridge, the tip of this annular ridge abuts against a madial wall of mortise groove part, form seal bead (seal-bead), to increase the contact convex tendon load be applied between tenon protuberance and mortise groove part, and to guarantee the sealability of adjustment face sealing component.
Preferably, mortise comprises a supporting element, and this supporting element is formed by an outside plate and an inner panel be pressed on the inner side of this outside plate.This supporting element is configured to support mortise groove part when compressing.By the amount that development and testing optimization is compressed, prevent to provide enough seal bead load leaking through the oil of mortise and tenon junction point, allow tenon protuberance to slide relative to mortise groove part with low friction simultaneously.
Preferably, the pit of the controlling depth well for receiving mortise groove part is formed by outside plate and inner panel, such as, when the match surface of two plates is pressed together in the mode of close contact.The invention is intended to carry out production control to the pit depth at inner panel place, make it possible to achieve the compression of the optimization of mortise as described above and tenon junction point.
In a preferred embodiment, mortise groove part is set to, every side place of the both sides of outside plate and inner panel faced by this mortise groove part, has the ring of two one-tenth ridgeds at interval, two concentric diameter places.When tenon protuberance slides in mortise groove part, the articulating of ridged is become to receive and transmit by the clamping force of seal bead (such as, being formed by the punching press) applying of tenon protuberance.Due to annular space certain between the ring of two one-tenth ridgeds at mortise groove part the same side place, the picture annular " leaf spring " that the portion section of mortise groove part in this annular space region shows in the case, the fulcrum serving as this leaf spring of the ring of the concentric one-tenth ridged of its protrusions, to avoid the extruding by tenon protuberance, make the friction law between tenon protuberance and mortise groove part insensitive about the manufacturing tolerances of the height of the seal bead on the height of the ring of the concentric projection on mortise groove part and tenon protuberance.Total effect is to provide more consistent seal bead load and the frrction load height of the concentric ring on mortise groove part and the manufacture change of the height of the seal bead on tenon protuberance to robustness.
In order to ensure sealing, preferably, room temperature vulcanization (RTV) silicone rubber sealant is applied between the inner plate and the outer plate at compression assembly process.This RTV sealing compound plays a part to comply with adhesive, is separated to prevent outside plate and compensates the change of the planeness between inner panel and the match surface of outside plate when suffering external force from inner panel.
Preferably, the inside bottom edge of mortise groove part and the periphery of tenon protuberance are provided with coupling plane in corresponding position, to prevent the relative rotation between mortise groove part and tenon protuberance.
In one embodiment, tenon is one and is assemblied in the annular component around rotating sealing member and tenon protuberance is on the outer periphery of tenon; Mortise is one and is fixedly attached to the annular component of cap and mortise groove part is on the inner periphery of described mortise.Preferably, mortise by being insert molded technique and cap integrally, or is not so adhered to cap preferably by adhesive.
Preferably, rotating sealing member is hydrogenated nitrile-butadiene rubber (HNBR) lips shaft seals, preferably has metal spring and excites.
Preferably, tenon protuberance is made up of double side zinc coating steel, thinks that tenon provides corrosion protection.
In a word, present invention also offers a kind of sealing configuration, sealing structure comprises: the cap with a hole; Be arranged on an axle in this hole, wherein above-mentioned seal arrangement to be disposed in this hole and to be mounted on this axle.
This cap can be motor body lid and this axle can be engine crankshaft.The present invention utilizes the vibration of the bent axle caused by engine firing frequencies to provide the weak impact load perpendicular to crankshaft center line wittingly, with make tenon protuberance relative to mortise groove part on the direction reducing the lateral load on sealing lip with small stride crawl; Thus prevent the foundation of remarkable lateral load by making tenon protuberance slide, maintain and crankshaft center line coaxial alignment thus.
Preferably, cap can be made up of the material identical or different with engine body.In order to reduce weight and save manufacture cost, preferably, cap is made up of plastic materials.
Due to seal arrangement of the present invention, even can make the external factor of sealing device and axle misalignment (such as, thermal distortion) when, motor body lid (such as, engine front cover) be no longer restricted to and be made up of the material identical with engine body, but the material different from engine body can be adopted.When being applied to the sealing lateral load on axle, such as, do not utilize factory aligned fixing device owing to reinstalling engine front cover during safeguarding, seal arrangement of the present invention can also eliminate lateral load by relative translation between mortise groove part and tenon protuberance.
Accompanying drawing explanation
Below, explain according to seal arrangement of the present invention in more detail with reference to drawing, draw below schematically showing:
Fig. 1 is the cross-sectional schematic view of engine pack, and wherein housing lid is equipped with according to seal arrangement of the present invention;
Fig. 2 shows the longitudinal cross-section view of the installment state of seal arrangement according to the present invention around engine crankshaft and in the hole of housing lid;
Fig. 3 shows the longitudinal cross-section view according to the mortise groove part of seal arrangement of the present invention and the jointing state of tenon protuberance;
Fig. 4 is the zoomed-in view of the engaging zones C between the mortise groove part of the seal arrangement shown in Fig. 3 and tenon protuberance;
Fig. 5 is the view along the tenon protuberance according to seal arrangement of the present invention such as obtained by the arrow Y indicated direction in Fig. 4; And
Fig. 6 is the diagrammatic cross-sectional view of the modularization Seal Design of prior art.
Embodiment
Fig. 1 shows a kind of engine pack 1 for vehicle (such as, automobile), comprises engine body 10, cylinder 11 in engine body and is linked to the bent axle 12 of the piston in cylinder by piston rod.In embodiment as shown, bent axle 12 is via the motor body lid 13 (such as, engine front cover) of through hole 130 through engine body 10.Through hole 130 plays a part bent axle 12 is extended out from engine body 10.In through hole 130, seal arrangement 20 is arranged between housing lid 13 and bent axle 12 to guarantee at the axial oil seal of song.Housing lid 13 is installed on engine body by known device for screwing up (such as, bolt) to close the chamber wherein holding bent axle and cylinder.
Particularly with reference to figure 2, seal arrangement 20 comprises dynamic seal (packing) component 21 (circumference rotating sealing member) and adjustment face sealing component 22 (quasistatic face seals), this dynamic seal (packing) component is assembled in around bent axle 12, and this adjustment face sealing component 22 to be assemblied in coaxially around dynamic seal (packing) component 21 and to be fixedly connected to housing lid 13.This dynamic seal (packing) component can be the commercially available dynamic seal (packing) component of any type, such as, has the HNBR lips shaft seal that metal spring excites.According to the present invention, adjustment face sealing component 22 comprises mortise 220 and tenon 230, and mortise 220 and tenon 230 can be engaged with each other in a sealing manner.Mortise 220 and tenon 230 circularize shape substantially and are formed by mortise groove part 221 and tenon protuberance 231 respectively, mortise groove part 221 and tenon protuberance 231 are configured to keep relative to each other removable in the plane (that is, vertical with crankshaft center line in this embodiment plane) of joint at mortise and tenon.
Shown in figure 2 in an embodiment, mortise 220 comprises support ring portion 222, and this support ring portion is fixedly connected to the inner circumferential edge of the housing lid 13 of limited hole 130.Support the mortise groove part 221 that ring portion 222 is configured to support mortise 220.As shown in Figure 2, mortise groove part 221 is arranged in the inner periphery of this support ring portion.Mortise groove part 221 is by having low friction and medium-hard elastomeric material is made.Preferably, this mortise groove part is made up of the FKM of the Shore A durometer hardness with 60-90.
Advantageously, support ring portion 222 outer ring plate A to be configured to have double layer construction and during pressing process by inner ring plate B is pressed into, by by inner ring plate B locally pressing/punching press toward the outside ring flat-plate A form the endless belt-shaped pit that is used for receiving mortise groove part.The degree of depth (critical product characteristic) of this pit is controlled by the profile of process inner ring plate B.Before depression, a kind of room temperature vulcanization (RTV) silicone rubber sealant is applied between inner ring plate B and outer ring plate A, forms oily leakage path betwixt to prevent due to the profile (such as, planeness or circularity) of mismatch.In addition, this RTV sealing compound can be used as and comply with adhesive and be separated with outer ring plate A due to the vibration from motor to prevent inner ring plate B.Therefore, the applying of RTV sealing compound at utmost can alleviate the control of product requirement for inner ring plate B and outer ring plate A.Alternatively, a kind of adhesive can additionally be applied between inner ring plate B and outer ring plate A to improve join strength therebetween.Preferably, inner ring plate B and outer ring plate A is made up of metal (such as, steel).
Those skilled in the art easily expect, support the double layer construction that ring portion 222 is not limited to be formed by inner ring plate B and outer ring plate A in Fig. 2; Such as, this support ring portion can be cast into single layer of rings component by metallic material.In the shown embodiment, support ring portion 222 can pass through conventional coupling arrangement (such as, adhesive) and be connected to housing lid.In a preferred embodiment, the edge supporting the outer periphery of ring portion 222 is inserted into by being insert molded technique in motor body lid 13, to realize supporting the firm connection between ring portion and motor body lid, be that non-essential and potential leakage path is eliminated to make the RTV sealing compound between inner ring plate B and outer ring plate A or adhesive require.About being insert molded technique, plastic materials (such as, polyesteramine material) can be selected to manufacture housing lid.Usually, because polyesteramine material has the fusing point of about 300 degree and metal (such as, steel) have fusing point much larger than 300 degree, can not support to be insert molded existing problems in the temperature of technique for the selection of the material of housing lid.Be insert molded technique and can not force too many restriction to the selection of the material for inner ring plate B and outer ring plate A.
With reference to figure 3 and Fig. 4, the mortise groove part 221 (FKM block) be contained in the pit that formed by inner ring plate B and outer ring plate A has four projections four corners.Because mortise groove part 221 is configured to a disc-shaped component, in fact four projections illustrated represent ring 221a, 221b, 221c, 221d that four become ridged, wherein two become ring 221a, 221b of ridged in the side in the face of inner ring plate B of mortise groove part 221 and are spaced at concentric diameter place, and another two become ring 221c, 221d of ridged at the opposite side in the face of outer ring plate A of mortise groove part 221 and are spaced at concentric diameter place equally.Described four become the ring of ridged effectively to provide four seal bead to leak out from the gap between mortise groove part 221 and inner ring plate B or outer ring plate A to prevent oil.As shown in Figure 3, the mortise groove part 221 of dish type is the form of the slit opened towards inner circumferential side along its whole inner periphery length substantially.This slit defines an annular chamber for engaging with tenon protuberance 231.
With reference to figure 2, tenon 230 comprises sleeve part 232 and tenon protuberance 231, and this sleeve part is assemblied in around dynamic seal (packing) component 21 in close-fitting mode coaxially, and this tenon protuberance stretches out along the outer periphery of sleeve part 232 in radial directions.Sleeve part 232 is substantially sleeve shape.Preferably, sleeve part 232 and tenon protuberance 231 are by casting technology by metallic material (such as, steel) global formation.When seal arrangement 20 operationally, the side (left side in Fig. 2) of tenon 230 is exposed to surrounding environment and contrary side (that is, the right side in Fig. 2) is exposed to oil.In order to prevent tenon 230 to be corroded further, preferably, this tenon is made up of bilateral galvanized steel.
When seal arrangement 20 is assembled well, the tenon protuberance 231 of tenon 230 is inserted in mortise groove part 221 (slit of FKM block), and between the inside bottom edge of the slit of the outer periphery of tenon protuberance 231 and mortise groove part 221, there is gap, to make tenon protuberance 231 can be removable in the slit of mortise groove part 221.During bent axle 12 rotates, mortise 220 moves along with the distortion of the housing lid 13 caused by thermal expansion, and simultaneously, tenon 230 moves along with the distortion of the bent axle 12 caused by thermal expansion (when motor is heated or be cooled, in 15 minutes, dynamic seal (packing) component is about 0.5mm perpendicular to total movement of the axis of bent axle).Due to the difference of the thermal expansion coefficient between the material of housing lid 13 and the material of engine body or bent axle, therefore it moves is different, inevitably causes the relative movement between mortise 220 and tenon 230.When bent axle less horizontal place and motor body lid be essentially perpendicular to bent axle axis place time because gravity, the relative movement between the mortise 220 caused by thermal expansion and tenon 230 occurs in the plane perpendicular to crankshaft center line substantially.If motor body lid is made of plastics and engine body or bent axle are formed from steel, because plastics have the thermal expansion coefficient larger than steel, (as shown in by the arrow X in Fig. 1) will cause the lateral load be imparted on bent axle downwards so the movement of the housing lid caused by thermal expansion.Adjustment face sealing component 22 (the power delivery component as between housing lid and bent axle) is engaged by slipper seal between tenon protuberance and mortise groove part and performs shift compensation, to eliminate the lateral load be shifted on the dynamic seal (packing) component 21 that causes by the difference of housing lid and bent axle.During the time period performing shift compensation, between tenon protuberance and mortise groove part, there is relative movement, make to be formed between mortise and tenon and relatively can the mortise-tenon of translation be connected.
In one embodiment, the side of tenon protuberance 231 is provided with annular ridge 2310, this annular ridge is such as formed by pressing or be embossed on flat tenon protuberance.The tip of the annular ridge 2310 of tenon protuberance 231 abuts against the inwall of mortise groove part 221.The annular ridge 2310 be arranged on tenon protuberance 231 is used to the seal load (N/mm) increasing the inwall abutting against mortise groove part partly, thus the slit maintaining mortise groove part 221 is flat pattern.Therefore, annular ridge 2310 can also be referred to as seal bead.
In response to the effect of the annular ridge 2310 of tenon protuberance 231, two at the same side place of the sidewall of mortise groove part 221 become the part between the ring of ridged to serve as one " leaf spring ", can be significantly reduced to make the friction between the annular ridge 2310 of tenon protuberance 231 and the madial wall of mortise groove part 221.Preferably, mortise groove part is made up of the elastomeric material (such as, FKM) with low friction, can not suffer large surface friction drag to make tenon protuberance relative to the slip of the madial wall of mortise groove part.In above-mentioned mortise-tenon is connected, because the annular ridge 2310 of tenon protuberance 231 slides relative to the madial wall of mortise groove part 221, by the one-tenth ridged of the same side of the sidewall at mortise groove part part between the flexural rigidity that provides of part (as leaf spring) can reduce relative to annular ridge 2310 friction.The annular ridge 2310 slided in slit can be vivo compared to a rabbit being compressed on below the blanket of described side and running.
Therefore, the combination that " leaf spring " design of mortise groove part and " seal ring " of tenon protuberance design can be guaranteed low friction between mortise groove part 221 and annular ridge 2310 and be applied to seal load enough on annular ridge by mortise groove part, be connected to make the mortise-tenon of adjustment face sealing component 22 and advantageously can realize self-regulating (the little relative movement between mortise and tenon is used to compensate the little movement relative to crankshaft center line of the dynamic seal (packing) component 21 that caused by thermal distortion) and sealability, and minimize further or eliminate the lateral load be applied on axle.
The degree of depth for the pit receiving mortise groove part 221 limited by inner ring plate B and outer ring plate A determines the clamping force be applied on mortise groove part.It is so not direct when affecting the friction between mortise groove part 221 and tenon protuberance 231 that " leaf spring " of mortise groove part 221 designs the clamping force making to become the ring of ridgeds to be applied to mortise groove part 221 from inner ring plate B and outer ring plate A by four.This means that the degree of depth of pit can change and not directly and the friction affected significantly between mortise groove part 221 and tenon protuberance 231 and seal load in a wider scope.Therefore, the design con-trol parameter for inner ring plate B and outer ring plate A is less sensitive for the manufacturing tolerances in manufacture process.
Be provided with in the run duration according to the motor of seal arrangement of the present invention, desirably, expecting that in the mortise 220 of seal arrangement 20, tenon 230 and dynamic seal (packing) component 21, neither one rotates relative to cylinder block.But in practice, the relative rotation between tenon protuberance 231 and mortise groove part 221 may occur.In a preferred embodiment, can from an outer periphery excision part for tenon protuberance 231 to allow this outer periphery to have at least one plane 233; Therefore, also there is a corresponding planar design in the corresponding position at the inner bottom part edge of the slit of mortise groove part 221; Because the inner bottom part edge of the outer periphery of tenon protuberance 231 and mortise groove part 221 has the matched shape of rotation asymmetry, so the relative rotation between tenon protuberance 231 and mortise groove part 221 can be avoided.On one or more Angle Position (such as, the Angle Position in 3-6-9-12 face) of periphery that is that described plane can be arranged on tenon protuberance or mortise groove part.It may occur to persons skilled in the art that on tenon projection with mortise groove part, arrange any other anti-rotational device for preventing relative rotation therebetween respectively, such as, keyed engagement structure, or, the outer periphery of tenon protuberance and the inner bottom part edge of mortise groove part are designed to non-rotational symmetric shape, such as, rectangle, triangle etc.
Although in the adjustment face sealing component of the seal arrangement shown in Fig. 1-Fig. 3, mortise is on the outer periphery of tenon, but based on described embodiment, those skilled in the art can easily expect another kind of variant, wherein tenon is assembled in around mortise, and the tenon protuberance of tenon inwardly points in radial direction, the mortise groove part of mortise is outwards opened in radial direction simultaneously.
According to the present invention, although engine body and motor body lid are made up of the different materials with different heat expansion coefficient, but by being arranged on the automatic adjustment of the adjustment face sealing component on dynamic seal (packing) component, the axis of seal arrangement always keeps aiming at the axis of engine crankshaft with coaxial manner.Therefore, the invention enables the material different from engine body to manufacture motor body lid and become possibility.Such as, motor body lid can replace aluminium to make by plastics.Replaced by this, the weight of motor body lid can reduce at least 66%.
In addition, seal arrangement 20 according to the present invention can be produced in modular fashion; Such as, adjustment face sealing component can be designed as a kind of modular parts, and the size of these modular parts is set to mate existing commercially available dynamic seal (packing) component.Therefore, research and develop risk can be greatly reduced and therefore produce and instrument cost can be reduced.
In addition, for the type had the motor being intended to the low-function demand benefiting from motor body lid of the present invention, if use seal arrangement of the present invention, then protecgulum will be no longer required to the accurate positioning control of engine body front-end face.Delete the necessary feature of accurate positioning control and provide the advantage that the present invention is better than the cost reduction of prior art.
Although the seal arrangement in Fig. 1 20 is illustrated in the through hole of the motor body lid be installed between bent axle and motor body lid, but those skilled in the art easily expect, seal arrangement 20 is applicable to axle and any other sealing engagement between having for the cap in the hole of axle, and is not limited to the sealing between engine shaft and motor body lid.Such as, seal arrangement of the present invention can be applied to the machine or equipment (such as, water pump, oil pump etc.) that need shaft sealing.Those skilled in the art can select suitable material to manufacture seal arrangement according to embody rule environment, to ensure at machine or the coaxial alignment between equipment run duration seal arrangement and axle.
Aforementioned description is only the preferred embodiments of the invention, and is not intended to limit the present invention.For those skilled in the art, under the prerequisite not departing from scope of the present invention, multiple remodeling and variant can be made.Those skilled in the art can obtain other embodiments based on to the consideration of this disclosure.This specification and embodiment are only considered to exemplary, and real protection domain of the present invention is limited by appended claims and equivalent technical solution.
Claims (16)
1. be used for the seal arrangement sealed between the hole of the cap of described axle for axle and setting, comprise:
A circumference rotating sealing member, is assembled in around the described axle through the hole of described cap; And
An adjustment face sealing component, is attached to described circumference rotating sealing member and is fixedly connected to described cap;
Wherein said adjustment face sealing component comprises the mortise and a tenon that are engaged with each other in a sealing fashion, and the annular tenon protuberance of the annular mortise groove part of described mortise and described tenon is configured to relative to each other to slide in a composition plane, to allow described seal arrangement to keep and described axle coaxial alignment.
2. seal arrangement according to claim 1, is characterized in that, described mortise groove part is the form of the slit be made up of the material of the Shore A durometer hardness with 60-90 (such as fluoroelastomer).
3. seal arrangement according to claim 1 and 2, is characterized in that, described tenon protuberance is provided with an annular ridge, and the tip of described annular ridge abuts against the madial wall of described mortise groove.
4. the seal arrangement according to any one in claim 1-3, it is characterized in that, described mortise comprises one for supporting the supporting element of described mortise groove part, and described supporting element is formed by an outside plate and an inner panel be pressed against on the inner side of described outside plate.
5. seal arrangement according to claim 4, is characterized in that, one is formed by described outside plate and described inner panel for the recess receiving described mortise groove part.
6. seal arrangement according to claim 5, it is characterized in that, described mortise groove part is set to, every side place of the both sides of described outside plate and described inner panel faced by described mortise groove part, has the ring of two one-tenth ridgeds at interval, two concentric diameter places.
7. the seal arrangement according to claim 5 or 6, is characterized in that, a kind of sealing compound is applied between described outside plate and described inner panel, such as, and RTV silicone rubber fluid sealant.
8. the seal arrangement according to any one in claim 1-7, it is characterized in that, the inside bottom edge of described mortise groove part and the periphery of described tenon protuberance are provided with coupling plane in corresponding position, to prevent the relative rotation between described mortise groove part and described tenon protuberance.
9. the seal arrangement according to any one in claim 1-8, is characterized in that, described tenon is one and is assemblied in the annular component around described circumference rotating sealing member and described tenon protuberance is on the outer periphery of described tenon; Described mortise is one and is fixedly attached to the annular component of described cap and described mortise groove part is on the inner periphery of described mortise.
10. seal arrangement according to claim 9, is characterized in that, described mortise is by being insert molded technique and described cap integrally or by adhesive is adhered to described cap.
11. seal arrangements according to any one in claim 1-10, it is characterized in that, described rotating sealing member is hydrogenated nitrile-butadiene rubber lips shaft seals, preferably has metal spring and excites.
12. seal arrangements according to any one in claim 1-11, it is characterized in that, described tenon protuberance is made up of bilateral galvanized steel.
13. 1 kinds of sealing configurations, comprising: a cap, and it has a hole; An axle, it is installed in described hole; And a seal arrangement, it to be mounted on described axle and to be disposed in the inside in described hole; Described seal arrangement is the seal arrangement according to any one in claim 1-12.
14. sealing configurations according to claim 13, is characterized in that, described cap is motor body lid and described axle is engine crankshaft.
15. sealing configurations according to claim 14, is characterized in that, described cap is made up of the material identical or different with described engine body.
16. sealing configurations according to claim 15, is characterized in that, described cap is made of plastics.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2013/073204 | 2013-03-26 | ||
| CN2013073204 | 2013-03-26 | ||
| PCT/EP2014/055614 WO2014154562A1 (en) | 2013-03-26 | 2014-03-20 | Sealing means and sealing structure comprising the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105209804A true CN105209804A (en) | 2015-12-30 |
| CN105209804B CN105209804B (en) | 2017-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480017886.9A Active CN105209804B (en) | 2013-03-26 | 2014-03-20 | Sealing device and the sealing structure including the sealing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105209804B (en) |
| WO (1) | WO2014154562A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307077A (en) * | 2017-07-27 | 2019-02-05 | 舍弗勒技术股份两合公司 | Seal assembly |
| CN109404538A (en) * | 2017-08-15 | 2019-03-01 | 斯凯孚公司 | Elastic axle envelope |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405897B (en) * | 2021-06-30 | 2022-09-30 | 中国航发贵州黎阳航空动力有限公司 | Piston rod strength and sealing test fixture |
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| CN1177071A (en) * | 1996-06-20 | 1998-03-25 | 卡尔·弗罗伊登伯格公司 | Sealing device for annular gap between casing and machine shaft |
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| CN109307077B (en) * | 2017-07-27 | 2022-11-29 | 舍弗勒技术股份两合公司 | Seal assembly |
| CN109404538A (en) * | 2017-08-15 | 2019-03-01 | 斯凯孚公司 | Elastic axle envelope |
| CN109404538B (en) * | 2017-08-15 | 2023-06-30 | 斯凯孚公司 | Elastic shaft seal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014154562A1 (en) | 2014-10-02 |
| CN105209804B (en) | 2017-03-29 |
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