CN101245857B - Sealing device - Google Patents
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- CN101245857B CN101245857B CN 200710037600 CN200710037600A CN101245857B CN 101245857 B CN101245857 B CN 101245857B CN 200710037600 CN200710037600 CN 200710037600 CN 200710037600 A CN200710037600 A CN 200710037600A CN 101245857 B CN101245857 B CN 101245857B
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Abstract
The invention relates to a sealing device which can be automatically adjusted and compensated, mainly comprising a ring-shaped sealing element which is provided with a cavity and filled with a fluid medium, an external retaining ring and an internal retaining ring which are respectively sheathed on the internal ring and the external ring of the sealing element; under free state, the sealing element is subject to the action of the external retaining ring and the internal retaining ring, and the width of the sealing device is larger than the width of the two retaining rings; wherein, the external retaining ring and the internal retaining ring are elastic retaining rings; the ring-shaped sealing element is in square shape or other irregular ring shape; the shape of the elastic retaining ring is matched with the shape of the sealing element; the ring-shaped sealing element can be replaced by a long-shaped sealing element or two communicated chambers or an inflation sac which is connected on the sealing element, etc. The invention provides the sealing device which can ensure the uniform pressing sealing at all places of the sealing device, and can ensure good sealing effect by carrying out automatic compensation according to the relative position change of the part to be sealed to a certain extent.
Description
Technical field
The present invention relates to a kind of seal arrangement, relate in particular to a kind of seal arrangement that can automatically adjust compensation.
Background technique
Sealing between different parts is situation very common in the industry, and gasket seal is by a large amount of being applied in pipeline, the equipment.At present common the mainly containing of sealing gasket: 1) asbestos washer, 2) rubber sheet gasket, 3) metal presss from both sides Graphite pad around sheet, etc.It is very extensive that gasket seal is used, such as be used in sealing gasket between water pump pump case and the water pump pump seat, be applied in gearhousing and gear block, gasket seal in the pipeline between two flanges, etc.Such as Fig. 1, Fig. 2, shown in Figure 3, be the patch applications situation that is applied to be placed on when two segment pipes connect between two flanges, pad is placed in the middle of two flanges, and two flanges are undertaken fastening by bolt.Wherein, after Fig. 1 represents normal mounting, the situation that working condition is ideal; After Fig. 2 represents to install, owing to leaking that the deflection of flange causes; Fig. 3 represents to install, use a period of time after leak because two flange relative positions change or the situation such as vibration can cause when occurring.So mainly there is following problem in existing seal arrangement:
1) is difficult to guarantee that pad sealing load throughout all equates.Pad is easy to cause the inhomogeneous compression at the circumference different parts when mounted.Such as the flange in 8 holes, when tightening different bolt respectively, be difficult to guarantee that the power of each bolt all is the same, it is very tight and opposite side is very loose to be easy to like this occur pad one side, that is to say that pad sealing impacting force of different parts on circumference is different, can cause leakage, as shown in Figure 2.
2) the very difficult size that guarantees the pad clamping force.Conventional spacers exists an insoluble contradiction, is difficult to guarantee that pad is compacted when the clamping force between flange is smaller, does not also just have sealing effect, if the clamping force between flange is very large, then can also will follow the string the crowded gross distortion of pad, also can leak.And exist pad and also have certain elasticity incipient the time, but the time follow the string once long, can not play seal action.Many times the sealing effect of pad is well after just installing, but along with the elongated pad of time can fluff and leaks.
3) can not do auto-compensation to relative variation the in the position that two sealed parts occur in to a certain degree, leak easily.Can not automatically adapt to each sealed part because the situations such as vibration, sedimentation, the swollen shrinkage of pad, the also still good seal after difficult these situations of assurance generation.After this thing happens, will leak the situation represented such as Fig. 3.And these situations often run in reality.
Sealing is retrieved to this class, and main term has sealing, pressure, pad, fill etc., has following:
CN91200673.0 F16K1/22 is with the metal hard-sealing wafer type butterfly valve of pressurized O shape ring;
CN92244911.2 F16K3/20 filling pressure sealing glasses valve;
CN92244910.4 F16K1/22 filling pressure sealing butterfly valve;
CN95230750.2 F16K1/22 medium filling pressure sealing butterfly valve;
CN96229201.X F16K5/06 pressure sealing ball valve;
CN97200510.2 F16K1/22 pressurized type butterfly type seal valve;
CN03263934.1 F16K5/06 pressurizing sealing half-ball valve;
CN200320101128.4 F16K1/22 medium filling pressure sealing butterfly valve;
CN200420117840.8 F16K5/06 (2006.01) I pressurized auxiliary sealing valve.
But they are compared with apparatus of the present invention larger difference is arranged, these all utilize outside pressurising, and are the application on valve, other has patent 00235061.0 pressure-adjustable sealing ring, be applied on the axial workpiece, and the design there is a great difference, and also exists the problems referred to above.
Summary of the invention
The object of the present invention is to provide and a kind ofly can guarantee seal arrangement even press seal throughout, even in the smaller situation of the clamping force between flange, also can guarantee sealing effect, and can make the seal arrangement that auto-compensation guarantees excellent sealing effect according to relative variation the in the position that sealed parts occur in to a certain degree.
The object of the present invention is achieved like this:
A kind of seal arrangement, it mainly comprises: an annular seal element, it has a cavity and is filled with flowing medium; One outer back-up ring and an inner shield ring are enclosed within respectively inner ring and the outer ring of described seal element, and described seal element is subjected to its width of effect of outer back-up ring and inner shield ring greater than the width of two back-up rings under the free state.Wherein, described outer back-up ring and inner shield ring are circlips; the described annular seal element side of being annular or other irregular annular; the shape of described circlip and the shape of seal element are complementary; the cavity of described seal element is provided with a topping up pipe, and this topping up tube end is sealed by a clip, and described topping up pipe outside cover has a protective tube; also be provided with location clearance measurement piece on the described outer back-up ring, the sealing surface of described seal element is provided with some projections.Also can be processed with projection on the sealing surfaces of sealed parts.
Annular seal element described in the above-mentioned seal arrangement can be replaced by a microscler seal element, and described inside and outside circlip keeps off respectively in the seal element both sides; Described seal element can be the cavity with two connections, and one of them cavity both sides is pressed with two outer rings that overlap mutually and can mutually slide and replaces an original circlip, and this one of them side, outer ring is provided with a butterfly spring; Also can connect a pressurising capsule on the cavity of described seal element, this pressurising capsule is provided with a small-scale liquid cylinder pressure or a resilient compressible member.
The present invention makes it compared with prior art owing to adopted above-mentioned technological scheme, has following advantage and good effect:
1, seal arrangement of the present invention can be adjusted the deflection between automatic adaptation two sealing surfaces (such as flange) automatically, even deflection occurs in the sealing surface position of two parts within the specific limits, can guarantee that also the sealing load on the seal arrangement is identical, the different Bolt Tightening Force that overcome to a certain degree interior flange installation are inconsistent;
2, seal arrangement of the present invention can guarantee the size of initial sealing load basically, and it is excessive tightly bad seal arrangement fastening force can not occur, the situation that the too small generation of fastening force is leaked also can not occur;
3, the change in location between seal arrangement energy auto-compensation two sealing surfaces of the present invention, can realize automatic pressurising, automatically adapt to the vibration of its connected element, the situation such as expand with heat and contract with cold, can not lose sealing effect because service time is long, make seal arrangement that good sealing effect can both be arranged for a long time;
4, seal arrangement of the present invention can play good long-acting sealing effect, overcomes the phenomenon of the run, drip, leak at sealing position, thereby makes the equipment neat and tidy, and is namely energy-conservation, also more environmental protection.
Description of drawings
To inventive embodiment and in conjunction with the description of its accompanying drawing, can further understand purpose of the present invention, concrete grammar feature and advantage by following.Wherein, accompanying drawing is:
Fig. 1 is working condition view ideally after the existing gasket seal normal mounting;
Fig. 2 is the view in the existing gasket seal installation rear flange deflection situation;
Fig. 3 installs change view in the situation of rear flange relative position for existing gasket seal;
Fig. 4 is embodiment 1 plan view;
Fig. 5 be Fig. 4 partly cut open left view;
Fig. 6 is the partial enlarged drawing to the N position of Fig. 5, and this moment, elastic ring was outer back-up ring;
Fig. 7 is the partial enlarged drawing to the N position of Fig. 5, and this moment, elastic ring was inner shield ring;
Fig. 8 is the U-U sectional view of Fig. 4, expression be the structure at topping up position;
Fig. 9 is embodiment 2 plan view;
Figure 10 be Fig. 9 partly cut open left view;
Figure 11 is the partial enlarged drawing to the M position of Figure 10, and this moment, elastic ring was outer back-up ring;
Figure 12 is the partial enlarged drawing to the M position of Figure 10, and this moment, elastic ring was inner shield ring;
Figure 13 be the L of Figure 11 to view, expression be structure for preventing that quiet outer ring and moving outer ring from throwing off;
Figure 14 is embodiment 3 plan view;
Figure 15 be Figure 14 partly cut open left view;
Figure 16 is the enlarged diagram to position S among Figure 15;
Figure 17 is the T-T sectional view of Figure 14, expression be the structure of filling with the press liquid position;
Figure 18 is the J-J sectional view of Figure 14, expression be the structure of clearance measurement piece;
Figure 19 is embodiment 4 plan view;
Figure 20 be Figure 19 partly cut open left view;
Figure 21 is the G-G sectional view of Figure 19;
Figure 22 is the D-D sectional view of Figure 19, expression be the structure of filling with the press liquid position;
Figure 23 is the H position partial enlarged drawing of Figure 19, and expression is the structural drawing of spring self-compensating pressure;
That Figure 24 represents is embodiment 5, and except embodiment 1, other embodiments' gasket shape can be processed as required;
What Figure 25 represented is the E-E sectional view of Figure 24;
Figure 26 is embodiment 6 plan view;
Figure 27 be Figure 26 partly cut open left view;
Figure 28 is the F position partial enlarged drawing of Figure 26;
Figure 29 represents is shape after pad among the embodiment 6 is extruded;
Figure 30 represents is shape one of adoptable filling pressure sealing ring both sides sealing face all among all embodiments;
Figure 31 represents is shape two of adoptable filling pressure sealing ring both sides sealing face all among all embodiments;
Figure 32 represents is shape three of adoptable filling pressure sealing ring both sides sealing face all among all embodiments;
Figure 33 represents the normal installation situation of apparatus of the present invention;
Figure 34 represents the working state one of apparatus of the present invention when abnormal conditions occurring, can automatically adjust to make the pad periphery stressed even everywhere, can avoid to a certain extent leaking;
Figure 35 represents the working state two of apparatus of the present invention when abnormal conditions occurring, and the energy auto-compensation needs the variation of sealed member relative position, can avoid to a certain extent leaking;
Figure 36 is the scheme of installation of clearance measurement piece among Figure 14;
Figure 37 is the partial enlarged drawing that embodiment 7 half cuts open left view, and its plan view is identical with Fig. 4, Figure 24.This figure is the free state of this seal arrangement when not installing;
Figure 38 is the partial enlarged drawing that embodiment 7 half cuts open left view, and this figure is the state that this seal arrangement is installed Descemets membrane sheet stress deformation;
Figure 39 is the second situation of embodiment 7, and expression flexible sheet position can arrange as required;
Figure 40 is the third situation of embodiment 7, and expression flexible sheet position can arrange as required;
Figure 41 exchanges the inside and outside coil structures among Figure 37;
Figure 42 is the H position partial enlarged drawing of Figure 19, and expression is the structural drawing of piston type self-compensating pressure;
Figure 43 is the schematic representation that this seal arrangement need to process at single sealed part square groove when being processed into long strip or arbitrary shape shown in Figure 24;
Figure 44 is the schematic representation that this seal arrangement need to process at two sealed parts square groove when being processed into long strip or arbitrary shape shown in Figure 24.
Embodiment
Embodiment 1
Extremely shown in Figure 8 such as Fig. 4, the radical elasticity that this embodiment's utilization is extruded the pressure of filling pressure sealing ring own and circlip seals, it mainly is comprised of inside and outside back-up ring and seal ring, it is flexible having one in the inside and outside back-up ring, can stretch when stressed, can be as required be arranged to one in two of the inside and outside back-up rings wherein flexible.Be two kinds of situations of this mode at Fig. 4 in Fig. 8, Fig. 6 is elastic ring 103 property condition outside, and Fig. 7 is elastic ring 105 situation inside.It all is annular deciding power inner shield ring 101, filling pressure sealing ring 102, the outer back-up ring 103 of elasticity etc.Their assembling, annexation, and the realization of action principle and purpose is such:
Filling pressure sealing ring 102 is the hollow rings as bicycle inner tube; material can be rubber etc. and has certain flexibility; stretchability; the material of intensity; the centre is Seal cage A; can be filled with liquid by topping up pipe 106; cover has a protective tube 107 on the topping up pipe 106; can encapsulate with a clip 108 after charging liquid; as shown in Figure 8; before installing, be filled with without pressure in this Seal cage A; the substantially incompressible liquid of volume; also can be that volume is compressible; other flowing mediums with certain pressure; such as gas, or its combination, this point also can be applied to following other embodiment.Herein preferably incompressible, not with the flowing medium of pressure.When installing, the flange facing of both sides has leaned against on two sides of filling pressure sealing ring 102, filling pressure sealing ring 102 four directions are blocked respectively, blocked by the part surface of required sealing on axial in both sides, the footpath is upwards blocked by inner shield ring and outer back-up ring, when tighting a bolt, liquid in will compression seal chamber A, because the liquid in the Seal cage A substantially can not be compressed, so just produced pressure, it is substantially non-deformable that decide power inner shield ring 101 this moment, the pressure of liquid will be so that the outer back-up ring 103 of elasticity produces resiliently deformable in the Seal cage A, so that the outer back-up ring 103 of elasticity expand outwardly (if inner ring be circlip be to intramedullary expansion), the fastening degree between flange: until two sealing surfaces of flange abutted in inner shield ring 101 about on two sides.
Because resiliently deformables occur the outer back-up ring 103 of elasticity, produce a spring-back force, also act on the filling pressure sealing ring 102, make it that pressure be arranged, and can overcome the variation to a certain degree of two flange relative positions, auto-compensation vibration, sedimentation, expand with heat and contract with cold etc.At this moment be tightened tensile buckling owing to connect the bolt of two side flanges, thereby the filling pressure sealing ring 102 that is filled with liquid is produced a powerful extruding force, because the equal transitivity of fluid pressure, the pressure of giving birth to this moment will be so that have equal and opposite in direction between flange two sealing surfaces, even the flange gap has the size deviation to a certain degree also can be by auto-compensation.It is substantially non deformable deciding power inner shield ring 101, and inner shield ring 101 axial dimension X are greater than the axial dimension Y of the outer back-up ring 103 of elasticity, and purpose is in order to guarantee the free deformation of the outer back-up ring 103 of elasticity.The axial dimension Z of filling pressure sealing ring 102 is not greater than X when installing.The axial dimension Z of filling pressure sealing ring 102 is variable, but because the location of X, the Z minimum value can not be less than X.Can preset difference and the shape of filling pressure sealing ring and the amount of interior filling medium between X and the Y, when the compression of Z value being become X when fastening, thereby the outer back-up ring 103 of elasticity is extruded to predetermined extent after can guaranteeing fastening finishing, and the generation amount of force is the elastic force of predetermined value.Thereby played the effect of control sealing load size.
Can be the groove of deciding the outer back-up ring 103 of power inner shield ring 101 and elasticity and process definite shape, in order to filling pressure sealing ring 102 is installed, and filling pressure sealing ring 102 is linked with inner shield ring 101 and the outer back-up ring 103 of elasticity, be unlikely to be scattered, this is optional, also can be not like this.Even because scatter when not installing, as long as be installed together the function that just can realize the design.
Embodiment 2
Extremely shown in Figure 13 such as Fig. 9, the axial elastic force that this embodiment's utilization is extruded the pressure of filling pressure sealing ring own and butterfly spring seals, it also mainly is comprised of inside and outside back-up ring and filling pressure sealing ring, with the difference of mode of execution one be that outer (or interior) back-up ring of present embodiment is comprised of dynamic and static two parts, and be equipped with a butterfly spring at moving back-up ring, can be arranged to outer back-up ring to the back-up ring of dynamic and static composition, as shown in figure 11; Also can be arranged to inner shield ring to the back-up ring of dynamic and static composition, as shown in figure 12.
Take Figure 11 and Fig. 9, Figure 10, Figure 13 as example, filling pressure sealing ring 202 is installed in inner shield ring 201 and quiet outer ring 203, moves between the outer ring 204, filling pressure sealing ring 202 is the hollow rings as bicycle inner tube, material can be the material that rubber etc. has certain flexibility, stretchability and intensity, the centre is Seal cage A, can be filled with liquid.Before installing, be filled with the substantially incompressible liquid of volume in this Seal cage, also can be with certain pressure can compressed other flowing mediums, or its combination, here preferred liquid not with pressure.
When this seal arrangement being installed between two flanges and tightening, filling pressure sealing ring 202 itself just is subject to a powerful extruding force, liquid in the A chamber is extruded in the B chamber, and the butterfly spring 205 on the moving outer ring of the expansion of B chamber and compression is so that resiliently deformable occurs butterfly spring 205.When installing, sealed two part surfaces abut against on two sidewalls of inner shield ring.Sealed two part relative positions change after deflection being installed or installing and using a period of time, at this moment the liquid in the B chamber that elastic force that resiliently deformables produce will compress filling pressure sealing ring 202 occurs in butterfly spring 205, liquid internal pressure in the B chamber is passed to the A chamber, still can be so that seal ring can be close to sealed two part surfaces.
Embodiment 3
To shown in Figure 180, present embodiment mainly is first whole pad to be installed between two flanges such as Figure 14, and fasteningly carries out pressurising after complete again, and seals after pressurising.Can be filled with compressible flowing medium with pressure.
Filling pressure sealing ring 502 is installed between inner shield ring 501 and the outer back-up ring 503, installs fasteningly to carry out pressurising by 504 pairs of filling pressure sealing rings of pressurising pipe 502 after complete.With clip 506 504 sealings of pressurising pipe are fallen after charging pressure.Protective tube 505 is enclosed within pressurising pipe 504 outsides and protective tube 505 is connected with outer back-up ring; protective tube 505 is to be out of shape behind pressurising pipe 504 pressurizeds in order to prevent; the effect of location clearance measurement piece 507 is to guarantee by the axial distance between Sealing during by Sealing in fastening both sides; guaranteed that this distance has also just guaranteed that the filling pressure sealing ring can only be compressed to predetermined degree, the filling pressure sealing ring is compressed to specific degrees and has just determined that elastic member can only produce the specific elastic force of amount of force.
To shown in Figure 23, present embodiment is take the another kind of mode of execution of embodiment 3 as the basis, can carry out automatic supplementary pressure, and can carry out the constant-pressure pressurising such as Figure 19.
Connection between present embodiment inner shield ring 601, filling pressure sealing ring 602 and the outer back-up ring 603 and position relationship are with embodiment 3, and the installation of its protective tube 605 and clip 606 and effect are also with embodiment 3.It is to carry out topping up (but not pressurising) by 604 pairs of filling pressure sealing rings of topping up pipe 602 first, then whole seal arrangement is installed between two parts that need sealing, fastening rear usefulness pressurising parts shown in Figure 23 carry out pressurising, pressurising parts shown in Figure 23 can play the variation that auto-compensation need seal the relative position between two parts, and can set this pressurising pressure.As shown in figure 23, the 612 o'clock meeting holddown springs 610 that tight a bolt, the elastic force of spring 610 acts on the pressurising capsule 608, thereby makes the liquid generation one in the filling pressure sealing ring 602 fix on pressure.The elastic force of spring can be measured, decrement can be reflected by scale 609 (scale 609 is fixed on the support 607) and pointer 611 when holddown spring 610, because size and the decrement proportion relation of elastic force, thereby so can learn the size of elastic force, also just know the pressure of filling pressure sealing ring 602 interior liquid.The pressurising capsule 608 that uses in the present embodiment also can carry out pressurising with the form of piston and oil hydraulic cylinder, and as shown in figure 42, wherein 613 is piston, and scale 609 is fixed on the piston 613, miscellaneous part such as Figure 23.
Embodiment 5
Such as Figure 24, shown in Figure 25, wherein: 701 is inner shield ring, and 702 is the filling pressure sealing ring, and 703 is outer back-up ring, and this embodiment can change according to actual conditions for the shape that pad is described.Except embodiment 1, other embodiments can process according to actual conditions the shape of pad, but the shape in its cross section can be identical with the sectional shape of other embodiments except embodiment one.Figure 24 has just arbitrarily provided a shape, expression can be processed as required, Figure 25 has only represented a kind of embodiment's situation, and seal arrangement internal structure as shown in figure 25 can also be shown in Figure 11, Figure 12, Figure 28, Figure 37, Figure 39, Figure 40, Figure 41 etc.
Embodiment 6
To shown in Figure 29, wherein 801 is inner shield ring such as Figure 26, and 802 is the filling pressure sealing ring, and 803 is outer back-up ring, and A is Seal cage.This embodiment represents that filling pressure sealing ring itself has just formed a spring, because be filled with medium certain pressure, compressible, fluid in filling pressure sealing ring 802 first before this device being installed between two parts that need sealing, seal ring 802 with pressure like this itself has just formed a similar air spring, the caulking gum arm of filling pressure sealing ring 802 both sides has been pressed against on the surface of two parts that need sealing, thereby has played seal action.It can adjust to adapt to deflection to a certain degree automatically, also can auto-compensation need seal change in location to a certain degree between two parts, again pressurising after also can installing, and just some is identical with embodiment 3 if install rear pressurising.
Embodiment 7
Such as Figure 37 to Figure 41,901 is inner shield ring among the figure, and 902 is the filling pressure sealing ring, 903 is outer back-up ring, and 904 is flexible sheet, and its China and foreign countries' back-up ring 903 is processed to flute profile, flexible sheet 904 is installed on the outer back-up ring 903, and flexible sheet 904 is close on the sidewall of filling pressure sealing ring 902.The axial dimension of this seal arrangement filling pressure sealing ring 902 when free state is greater than the axial dimension of inside and outside back-up ring, and filling pressure sealing ring 902 is equipped with flowing medium.Flowing mediums in the process of installing in the filling pressure sealing ring 902 are by the axially sealed part extruding of both sides, and filling pressure sealing ring 902 at this moment will pressure elasticity diaphragm 904, and it is deformed.The restoring force that installs Descemets membrane sheet 904 can act on the filling pressure sealing ring 902, thereby produces pressure, realizes excellent sealing effect.In the present embodiment can be a back-up ring that is set to flexible sheet 904 in the inside and outside back-up ring, also can all be arranged to back-up ring with flexible sheet 904 to inside and outside back-up ring.In the present embodiment, flexible sheet can be vertical with the position of sealed part surface, such as Figure 37, shown in Figure 41; Also can intersect, as shown in figure 39; Also parallel, as shown in figure 40.
Other item
1, seal arrangement of the present invention can be realized the wiper seal of auto-compensating by embodiment 1, embodiment 2, embodiment 4, embodiment's 6 structure, but embodiment 1 only limits to circular gasket, other three (embodiment 2, embodiment 4, embodiment 6) then can pad be processed into two need sealing workpiece shape, also can realize good sealing effect, such as Figure 24 and shown in Figure 25.
2, too be out of shape in order to prevent that the filling pressure sealing annulate shaft from making progress in each embodiment, inside and outside circle is necessary.But also can process definite shape by sealed parts in both sides among each embodiment, then the structure in conjunction with in corresponding or outer ring obtains outer, the same function of inner ring.Such as in embodiment 1 or 2, inelastic back-up ring being processed into protruding ring on the sealed parts in both sides, also can realize predetermined function.
3, the shape of outer ring can be with holes can be not with holes yet, whether perforate only is to consider to need tight fixed bolt to pass, and the function of this pad is not had the impact of essence.The mode concordant with the outward edge of sealed part is processed in the outer ring of seal arrangement among the present invention, can be convenient to like this centralized positioning of pad, can play again to observe to adjust on the pad circumference with the gap that measures according to outward edge being compressed uniformly everywhere.
4, can process certain shape that matches on inside and outside circle and the filling pressure sealing ring, thereby this three can not scattered, but this is optional, scatter namely that also it doesn't matter, as long as place just passable when installing.In addition, also can process the shape that other match on inside and outside circle and the filling pressure sealing ring, if can reach this purpose just can, do not do ad hoc requirement here.
5, in embodiment 1 and embodiment 2, the structure of inside and outside circle and function are different, but inside and outside circle can exchange, and be exactly two kinds of situations of same embodiment such as Fig. 6 and Fig. 7: inner shield ring is nonelastic inner shield ring 101 among Fig. 6, but outer back-up ring then is back-up ring 103 outside the resilient elasticity; Then be that inner shield ring is resilient inner shield ring 105 among Fig. 7, outer back-up ring then is inelastic outer back-up ring 104, although Fig. 6 is slightly different from the structure of Fig. 7, its principle is the same with effect; Figure 11 and Figure 12 also are as a same reason.
6, the both sides of filling pressure sealing ring in each embodiment, can process certain shape on the face of namely pressing close to mutually with two sealing surfaces, some projections namely are set, to increase the local compression between filling pressure sealing ring and the sealing surface, its shape is as to Figure 30, Figure 31 of the partial enlarged drawing at the R position of Fig. 6, shown in Figure 32, to reach better sealing function.But this neither be necessary, can select according to the needs of actual conditions.
7, the pressurising of filling pressure sealing ring only provided a kind of method herein, as shown in Figure 8, it has adopted the 106 pairs of filling pressure sealing rings of topping up pipe 102 that are connected with filling pressure sealing ring 102 to carry out topping up (also can be filled with other flowing medium with certain pressure), charges to seal with clip 108 afterwards.Apparatus of the present invention also can be carried out topping up with other modes, such as the mode with bicycle porthole core, perhaps give mode of basketball, football inflation etc., here no longer one by one narration.
8, in order to prevent that throw off quiet outer ring and moving outer ring among the embodiment 2 when not installing, can adopt the structure in Figure 11 upper left corner, its L to view as shown in figure 13.Throw off the function that also can affect this pad when not installing, because this place's structure and function can not wanted, prevent that the mode of throwing off from also having other a variety of yet, no longer do one by one explanation here and limit.
9, in the embodiment who has, can be filled with not with pressure, incompressible fluid medium, also can be filled with compressible flowing medium with pressure, such as embodiment 1 and embodiment 2, and embodiment 3, embodiment 4 etc.If but when in embodiment 1 and 2, being filled with not with pressure, incompressible fluid medium, then realize auto-compensation by filling pressure sealing ring self backward extrusion pressure or with metal spring elastic force; Which kind of if will increase the active force of an air spring when being filled with pressure, compressible flowing medium, can decide according to the actual conditions needs as for filling medium.
10, be processed with outside as shown in figure 14 location clearance measurement piece 507 among each embodiment on the back-up ring, its installation and effect are as shown in figure 36, its effect is to guarantee by the axial distance between Sealing during by Sealing (such as two adjacent flanges) in fastening both sides, guaranteed that this distance has also just guaranteed that the filling pressure sealing ring can only be compressed to predetermined degree, what the filling pressure sealing ring was compressed to that specific degrees just determined elastic member can only produce the specific elastic force of amount of force.
11, such as Fig. 6, Fig. 7, Figure 11, Figure 12, Figure 23, Figure 21, shown in Figure 28, the filling pressure sealing ring diametrically local Thickness Ratio near inside and outside back-up ring edge corner angle is thicker, the hollow part of filling pressure sealing ring mediates, the both sides, hollow part also have certain distance, can avoid so serious, undue, unwanted distortion occurs in the gap of filling pressure sealing ring between inside and outside back-up ring and two flanges, avoid the fluid in the filling pressure sealing ring to be squeezed leakage through interior or outer back-up ring and in by the sideshake between the Sealing from the both sides thin-walled.
12, such as Figure 43, shown in Figure 44, larger or when being processed into as shown in figure 24 irregular non-circular when this seal arrangement, inside and outside circle may be extruded and internal pressure rising rear distraction at the filling pressure sealing ring, can process the square groove that matches with this seal arrangement at sealed part surface for fear of the generation of this situation; Also can be at a certain distance simultaneously at inner ring inboard and outer ring arranged outside block.So the radially relative position of inner ring and outer ring will be fixed by trough rim or block, forms axial seal pressure thereby be conducive to the filling pressure sealing ring.Can only process the square groove that matches with this seal arrangement at a sealed part surface when processing described square groove, as shown in figure 43; Also can only on two sealed part surfaces, all process the square groove that matches with this seal arrangement, as shown in figure 44.The processing block also is so, and the figure of processing block does not draw.
State under the seal arrangement normal mounting of the present invention in above-described embodiment as shown in figure 33, install when seal arrangement of the present invention in the situation of deflection, deflection in the time of can automatically adjusting to adapt to initial the installation, the interior liquid of filling pressure sealing ring makes this device periphery, and sealing load is even everywhere, avoid to a certain extent the generation of leaking, this moment its state and effect as shown in figure 34; When because of sedimentation, expand with heat and contract with cold, the generation of the situation such as vibration is so that the relative position of two sealed parts when occurring changing, seal arrangement of the present invention can the sealed parts relative position of auto-compensation variation, avoid to a certain extent leaking, its state and effect are as shown in figure 35 at this moment.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (13)
1. seal arrangement is characterized in that comprising:
One annular seal element, it has a cavity and is filled with flowing medium;
One outer back-up ring and an inner shield ring are enclosed within respectively inner ring and the outer ring of described seal element, and at least one is made as circlip described outer back-up ring and inner shield ring;
Its width of effect that the sealing element is subjected to outer back-up ring and inner shield ring under the free state is greater than any one the width in two back-up rings.
2. seal arrangement as claimed in claim 1 is characterized in that: described annular seal element is replaced by a microscler seal element, and described inside and outside back-up ring keeps off respectively the inside and outside both sides that directly make progress at seal element.
3. seal arrangement as claimed in claim 1 is characterized in that: described annular seal element is side's annular or other irregular annular, and the shape of described outer back-up ring and inner shield ring and the shape of seal element are complementary.
4. seal arrangement as claimed in claim 1, it is characterized in that: described seal element has the cavity of two connections, both sides, front and back on one of them cavity is axial are pressed with two back-up rings that overlap mutually and can mutually slide and replace a circlip, and one of them back-up ring side is provided with a butterfly spring.
5. seal arrangement as claimed in claim 1 is characterized in that: described inside and outside back-up ring has at least a back-up ring to be set to flute profile, and described flute profile back-up ring opening is equipped with flexible sheet, and described flexible sheet and seal element stick together.
6. seal arrangement as claimed in claim 1, it is characterized in that: described inner shield ring is different from the width of outer back-up ring.
7. such as the described seal arrangement of claim 1-6 any one, it is characterized in that: also connect a pressurising capsule on the cavity of described seal element, this pressurising capsule is provided with a small-scale liquid cylinder pressure or a resilient compressible member.
8. such as the described seal arrangement of claim 1-6 any one, it is characterized in that: the cavity of described seal element is provided with a topping up pipe, and this topping up tube end is sealed by a clip.
9. seal arrangement as claimed in claim 8 is characterized in that: described topping up pipe outside cover has a protective tube.
10. such as the described seal arrangement of claim 1-6 any one, it is characterized in that: also be provided with location clearance measurement piece on the described outer back-up ring.
11. such as the described seal arrangement of claim 1-6 any one, it is characterized in that: the sealing surface of described seal element is provided with some projections.
12. such as the described seal arrangement of claim 1-6 any one, it is characterized in that: the fluid in the cavity of described seal element is the fluid with pressure.
13. seal arrangement as claimed in claim 12 is characterized in that: be filled with liquid or gas in the cavity of described seal element, perhaps its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710037600 CN101245857B (en) | 2007-02-15 | 2007-02-15 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710037600 CN101245857B (en) | 2007-02-15 | 2007-02-15 | Sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245857A CN101245857A (en) | 2008-08-20 |
| CN101245857B true CN101245857B (en) | 2013-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710037600 Expired - Fee Related CN101245857B (en) | 2007-02-15 | 2007-02-15 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101245857B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313014B (en) * | 2011-06-08 | 2014-08-20 | 慈溪市恒立密封材料有限公司 | High-safe-reliability nuclear-grade seal gasket |
| CN102425667A (en) * | 2011-11-28 | 2012-04-25 | 北京动力机械研究所 | Seal assembly for air inlet passage special-shaped cavity |
| CN104534093A (en) * | 2014-12-19 | 2015-04-22 | 天津科斯特汽车技术有限责任公司 | Spring tension type sealing piece |
| CN105402402B (en) * | 2015-10-30 | 2017-09-12 | 宁波凌珂新材料科技有限公司 | Vapour-pressure type gasket seal |
| JP6602645B2 (en) * | 2015-11-02 | 2019-11-06 | ニッタ株式会社 | Sealing material fixing structure |
| CN107956872B (en) * | 2017-11-29 | 2024-05-14 | 陕西法士特齿轮有限责任公司 | Piston and piston fork shaft connecting assembly and disassembly and assembly method thereof |
| CN108105387A (en) * | 2018-01-30 | 2018-06-01 | 洛阳理工学院 | A kind of new end face seal structure |
| CN108426036B (en) * | 2018-05-17 | 2024-10-15 | 苏州宝骅密封科技股份有限公司 | Radial sealing device with adjustable sealing pressure |
| CN111288167A (en) * | 2018-12-07 | 2020-06-16 | 江苏金泰密封科技有限公司 | Elastic sealing gasket |
| CN110145599B (en) * | 2019-05-28 | 2024-09-27 | 江苏龙净节能科技有限公司 | High-pressure flange sealing structure for heat exchange device header |
| CN110285283B (en) * | 2019-07-06 | 2021-05-14 | 余红超 | Polypropylene anti-corrosion pipe joint |
| CN112648384B (en) * | 2020-12-30 | 2023-02-03 | 苏州宝骅密封科技股份有限公司 | Medium self-tightening sealing device |
| CN113279877A (en) * | 2021-05-28 | 2021-08-20 | 一汽解放汽车有限公司 | Seal gasket and engine |
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| CN1269584A (en) * | 1999-04-07 | 2000-10-11 | Abb燃烧工程核力公司 | Floating-slot sealing assembly with ring-shaped supporting structure for limting leakage |
| US20030151209A1 (en) * | 2001-11-22 | 2003-08-14 | Hans-Peter Schmid | Sealing cord and packing system comprising a plurality of such sealing cords |
| US6942224B2 (en) * | 2003-07-16 | 2005-09-13 | Steris Inc. | Inflatable seal |
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|---|---|---|---|---|
| CN86201567U (en) * | 1986-03-17 | 1987-08-26 | 李建新 | Double direction oil-immersed water proof seal |
| CN1092139A (en) * | 1992-09-04 | 1994-09-14 | 雷伊公司 | The sealing of object |
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| US20030151209A1 (en) * | 2001-11-22 | 2003-08-14 | Hans-Peter Schmid | Sealing cord and packing system comprising a plurality of such sealing cords |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101245857A (en) | 2008-08-20 |
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