CN203686145U - Temperature-triggered passive parking safety sealing device - Google Patents
Temperature-triggered passive parking safety sealing device Download PDFInfo
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- CN203686145U CN203686145U CN201420039874.3U CN201420039874U CN203686145U CN 203686145 U CN203686145 U CN 203686145U CN 201420039874 U CN201420039874 U CN 201420039874U CN 203686145 U CN203686145 U CN 203686145U
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Abstract
The utility model provides a temperature-triggered passive parking safety sealing device. According to the temperature-triggered passive parking safety sealing device, a ring slot type sealing structure is arranged between a static sealing ring and a rotating or shaft sleeve, wherein the static sealing ring is clearance fit with the outer side of the rotating shaft or the shaft sleeve and is connected on a fixing structure through a rotating preventing structure in a positioning mode, and the ring slot type sealing structure is at least adjacent to the rotating shaft or the shaft sleeve, is clearance fit with a U-shaped axial section and can be deformed by temperature triggering; the ring slot type sealing structure comprises an inner structural layer and an outer structural layer, wherein the inner structural layer and the outer structural layer are of two different coefficients of linear expansion, the U-shaped section opening portion of the inner structural layer and the U-shaped section opening portion of the outer structural layer are fixed mutually, and the U-shaped face of the inner structural layer and the U-shaped face of the outer structural layer are relatively superimposed , and the coefficient of linear expansion of the inner structural layer is larger than the coefficient of linear expansion of the outer structural layer. A sealing structure which can abut against the adjacent structure after the deforming is at least arranged on the U-shaped section opening portion of the ring slot type sealing structure, and a flowing gap which enables leakage media to inflow or outflow in a U-shaped cavity is formed and kept in the adjacent portion of the U-shaped opening and the rotating shaft or the shaft sleeve. The structure can achieve the parking sealing function reliably during the outage, and is the effective safe curtain for preventing the flow leakage, and has significant advantages in the application in the device conveying high-temperature and harmful media.
Description
Technical field
The utility model relates to a kind of parking safety sealing device of the mechanical seal that can be used for various fluid rotary equipment; the particularly non-active parking safety sealing device of a kind of temperature triggered formula; break down at mechanical sealing system; Seal cage temperature rise causes seal failure or partial function to lose efficacy; needing protection property is stopped and is blocked while leakage, for stoping fluid leakage and ensureing safety.
Background technique
In modern industry application, in order to reduce the pollution to environment and to ensure production safety, performance and reliability requirement to sealing are more and more higher, while particularly carrying high temperature, high pressure or hazardous medium, especially require high temperature, hazardous medium can not enter subordinate's Seal cage or make it and atmosphere intercepts completely.Otherwise once carry the mechanical seal of high temperature, poisonous fluid device to lose efficacy, these media enter into secondary seal chamber and can cause damage to secondary seal ability; Leak in atmosphere and will cause disastrous effect to environment.Main solution is to increase in mechanical seal outside the security seal that stops together at present, and when equipment runs well, parking security seal is in opening state; When certain fault appears in system, cause Seal cage temperature to raise, mechanical seal was lost efficacy, the parking security seal closure even if equipment downtime is existed side by side.
At present, the structural type of parking sealer is a lot, wherein most widely used is centrifugal parking sealer, pressure regulating type parking sealer and expanding type parking sealer etc., be dynamic role parking sealer, but it generally all can not stop medium to external leakage completely, out-of-work danger after running out of steam, cannot ensure absolute safety.
Model utility content
For above-mentioned situation; the utility model provides a kind of non-active parking safety sealing device of temperature triggered formula; can be according to the work condition state of sealing medium; under nominal situation condition, can make mechanical seal ensure normal working; and in the time that the temperature/pressure that causes sealing position of breaking down increases extremely; can realize parking sealer by the structural change of self without additionaling power; prevent that between down period the high temperature in Seal cage, high pressure, the medium such as poisonous are to atmosphere or other multi-stage sealed leakage, with by ensureing safety.
The basic structure of the non-active parking safety sealing device of temperature triggered formula of the present utility model, be to be located by connecting between the stationary seal ring and running shaft or axle sleeve of fixed structure outside running shaft or axle sleeve and through rotation prevention structure in Spielpassung, be provided with at least with running shaft or axle sleeve is adjacent and Spielpassung has the ring-groove-type sealing configuration that can be out of shape by temperature triggered of tool U-shaped axial cross section.In this ring-groove-type sealing configuration, include two linear expansion coeffcients relatively stacked with U-shaped face and that interfix at its U-shaped cross section opening portion external and internal compositions layer not etc., wherein the linear expansion coeffcient of inner structure layer is greater than external structure layer.The external and internal compositions layer that said this linear expansion coeffcient does not wait, can preferably adopt the bimetal ring plate structural type of very ripe and conventional different linear expansion coeffcient bimetallic strip/layer form in automatic temperature-adjusting control structure at present, and can be according to the feature such as temperature, pressure of institute's fed sheet of a media, determine the poor and structural parameter of selected respective material kind, linear expansion coefficient (for example, external structure layer can select linear expansion coefficient very little as material piece such as nifes; Inner structure layer can be selected copper or the steel material sheet etc. that linear expansion coefficient is larger).At least at the U-shaped cross section of said this ring-groove-type sealing configuration opening portion, be provided with after distortion can with its inconsistent sealing configuration of adjacent structure, as conventional caulking gum, plastics or plastic cement etc. have flexible sealing material/structure.At the adjacent regions place of U-shaped opening and running shaft or the axle sleeve of ring-groove-type sealing configuration, (this gap can adopt corresponding structure to ensure also should to maintain the flow clearance that allows leaking medium to pass in and out in the U-shaped chamber of ring-groove-type sealing configuration, also can be under pressure medium effect and produced by the Leading Edge Deformation of ring-groove-type sealing configuration inner structure layer), with the balance of the U-shaped chamber external and internal pressure of retaining ring grooved sealing configuration, and can react rapidly the variation of temperature, pressure under abnormal condition.
The above-mentioned ring-groove-type sealing configuration that can be out of shape by temperature triggered that is arranged on this tool U-shaped axial cross section between stationary seal ring and running shaft or axle sleeve, according to circumstances can distinguish in different ways with needs.For example, said ring-groove-type sealing configuration can be set directly in the step hole of the appropriate format of offering with running shaft or the adjacent stationary seal ring side of axle sleeve; Maybe can adopt and be arranged on and running shaft or axle sleeve is adjacent and be fixed on the mode in the corresponding form step hole of offering in the suitable transition structure between stationary seal ring and fixed structure through linkage structure, or other suitable mode.
On said structure basis, realize for further improving this ring-groove-type sealing configuration under damage the reliability sealing, the sealing configuration of U-shaped opening portion in said this ring-groove-type sealing configuration, can be adopted as and also have the form to the extension covered structure of opening outer circumferential face expansion at said U-shaped opening portion, while realizing sealing to increase, sealing structure has larger sealing contact laminating scope.The periphery of extending covered structure in the expansion of said this U-shaped opening portion outer circumferential face position that is sealed and matched can also further be provided with protruding annular seal line again, will more be conducive to improve undoubtedly the effect of sealing.
For high temperature, high pressure and/or the poisonous flowing medium position of avoiding the internal surface in the U-shaped chamber of said inner structure layer in above-mentioned ring-groove-type sealing configuration to carry because of Long contact time impaired, poison the feature of character according to the type of carried flowing medium and/or temperature, pressure, corrosivity or radiant quantity etc., can be coated with by current usual manner the safeguard structure layer of the respective material/forms such as engineering plastics or rubber material such as conventional PTFE, PEEK or ethylene propylene rubber at the U-shaped inner cavity surface of this ring-groove-type sealing configuration inner structure layer.On this basis, further making this safeguard structure layer of the U-shaped inner cavity surface coating of ring-groove-type sealing configuration, become a continuous integral form structure with the above-mentioned sealing configuration at U-shaped opening portion, is more favorably optimal way of one.
Further, in above-mentioned ring-groove-type sealing configuration, be to extend in the external and internal compositions layer with different linear expansion coeffcients in covered structure covering area range in the said expansion of U-shaped opening portion outer circumferential face, also can be provided with the safeguard structure layer for making the coating of said U-shaped inner cavity surface, extend with the expansion at U-shaped opening portion outer circumferential face the through hole that covered structure can run through fusion mutually, making it further mutually merge and become a structural entity, will be more preferably for the integral firmness and the intensity that improve above-mentioned ring-groove-type sealing configuration.
As above-mentioned, under nominal situation state, should allow the U-shaped chamber of leaking medium through the flow clearance turnover ring-groove-type sealing configuration of said ring-groove-type sealing configuration, wherein this flow clearance adopts the structure of appropriate format to ensure it will will be more reliable.For this reason, this flow clearance can be adopted as with the U-shaped opening of running shaft or the adjacent ring-groove-type sealing configuration sidewall of axle sleeve inside the gap structure of the appropriate format that arranges of edge (for example end of this inner structure layer in ring-groove-type sealing configuration etc.), as realized the structure (being the gap planar fashion that can realize specific fit system as what adopt in specific embodiment that can be for reference at one) of the form such as gap plane, groove of specific fit system.
Be appreciated that, while needing to start sealing under improper condition for being more conducive to above-mentioned ring-groove-type sealing configuration, can be triggered rapidly startup by high temperature or high-pressure leakage medium, the storing mode of this ring-groove-type sealing configuration, should adopt make its U-shaped opening should towards sealing high temperature media direction.
Working procedure and the principle of the non-active parking safety sealing device of the utility model said temperature trigger type are, under mechanical seal device accidental conditions state, this each structure division that stops accident-free vehicle sealing configuration all maintains enough normal matching gaps with running shaft or axle sleeve, both ensured the normal operation of sealing, also make seal leakage medium energy proper flow, this stops the U-shaped chamber in said this ring-groove-type sealing configuration in accident-free vehicle sealing configuration to comprise turnover, and the balance of U-shaped chamber external and internal pressure in retaining ring grooved sealing configuration.When the unusual service condition such as break down makes the improper rising of temperature of medium, while causing fluid rotary machine protectiveness to be shut down, inner structure layer that in this ring-groove-type sealing configuration, linear expansion coeffcient is larger (as adopted the inner layer metal ring plate in bimetal ring plate structure) dilatancy is large and oppress external structure layer and deform, by after the sealing configuration extruding of the U-shaped cross section opening portion of ring-groove-type sealing configuration, conflict, be fitted on the sidewall of the adjacent structure of running shaft or axle sleeve and institute, the throttling of realization to leaking medium; And the leaking medium that continues the U-shaped chamber inner chamber that enters ring-groove-type sealing configuration also makes the pressure (or claiming parking sealer upstream pressure) in U-shaped chamber increase gradually and is greater than the pressure (or claiming parking sealer downstream pressure) outside U-shaped chamber simultaneously.Under the effect of this temperature and/or pressure, the dielectric leakage position gluing, sealings such as the sealing configuration such as engineering plastics or rubber (while particularly simultaneously also establishing bossed potted line) on this ring-groove-type sealing configuration and axle or axle sleeve obtain tightr, even if after temperature declines gradually, continue to rely on the effect of pressure still can ensure that reliable parking sealer is unaffected.
This shows; the non-active parking safety sealing device structure of temperature triggered formula of the above-mentioned form of the utility model simple in structure, ingenious; occurring reliably realizing parking sealer function between the down period of unusual service condition; it is the effective and safe barrier that stops fluid leakage; during especially for the equipment of high temperature, high pressure and hazardous medium of conveying, can there is more outstanding advantage.
Below in conjunction with the embodiment of accompanying drawing illustrated embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as to the scope of the above-mentioned theme of the utility model only limits to following example.Do not departing from the above-mentioned technological thought situation of the utility model, various replacements or the change made according to ordinary skill knowledge and customary means, all should be included in scope of the present utility model.
Brief description of the drawings
Fig. 1 is a kind of structural representation under the non-active parking safety sealing device installment state of the utility model temperature triggered formula.
Fig. 2 is the enlarged diagram of the ring-groove-type sealing configuration in Fig. 1.
Fig. 3 is the view that structure shown in Fig. 1 realizes seal action principle.
Embodiment
Fig. 1 and Fig. 2 are a kind of forms of the non-active parking safety sealing device of the utility model temperature triggered formula.In the mechanical seal device forming at the conventional rotating seal ring relative with shaft end seal face of the routine shown in Fig. 1 11 and stationary seal ring 8, rotating seal ring 11 coordinates with 9 transmissions of running shaft/axle sleeve through driving pin (or key) 13, therebetween and be provided with seal ring 12; Stationary seal ring 8 Spielpassung, outside running shaft/axle sleeve 9, and are located by connecting on the fixed structures 1 such as the end cap of seal arrangement through the rotation prevention structures such as stop pin 7.Between stationary seal ring 8 and end cap also through the linkage structures such as screw 2 and fixed structure (end cap) 1 be located by connecting, and same and running shaft/axle sleeve 9 Spielpassung be provided with a transition structure 5, and be respectively arranged with seal ring 3,6 at the matching part place of itself and fixed structure (end cap) 1 and exquisite seal ring 8.In a step hole of transition structure 5 and running shaft/axle sleeve 9 adjacent regions, at least be provided with to maintain the mode of matching gap under nominal situation the ring-groove-type sealing configuration 4 that has U-shaped axial cross section, also can be out of shape by temperature triggered with running shaft/axle sleeve 9, its storing mode is the direction that makes its U-shaped opening High Temperature High Pressure region outside heat shielding.When normal operation, sealing injected water can stop the freezing mixture in High Temperature High Pressure region to enter Seal cage.
As shown in Figure 2, in this ring-groove-type sealing configuration 4, include the external and internal compositions layer 42 of two linear expansion coeffcients relatively stacked with U-shaped face and that interfix in the mode such as normal welding or riveted joint at its U-shaped cross section opening portion 44 bimetal ring plate form not etc., 41, wherein the linear expansion coeffcient of interior metal ring chip architecture layer 42 is greater than outer metal ring chip architecture layer 41.After the U-shaped cross section of ring-groove-type sealing configuration 4 opening portion 44 is provided with dilatating and deformable can with its adjacent structure inconsistent and realize sealing the engineering plastics such as conventional PTFE, PEEK or ethylene propylene rubber or the sealing configuration 47 of rubber material form, and sealing configuration 47 is also at the extension covered structure 49 of the oriented outer circumferential face expansion of the U-shaped opening portion of ring-groove-type sealing configuration 4, the periphery of extending covered structure 49 in this expansion position that is sealed and matched is also provided with the potted line 45 of some annular projections.In ring-groove-type sealing configuration 4 on the U-shaped inner cavity surface of this inner structure layer 42, also be coated with engineering plastics or the rubber material form safeguard structure layers 46 such as same selection PTFE, PEEK or ethylene propylene rubber, preferably adopting with sealing configuration 47 is identical material, and makes the safeguard structure layer 46 of U-shaped inner cavity surface and the sealing configuration 47 of U-shaped opening portion become the overall structure of conitnuous forms.The external and internal compositions layer 42 of being expanded 49 overlay area parts of extension covered structure by U-shaped opening portion outer circumferential face in ring-groove-type sealing configuration 4, in 41, being provided with some shown in the through hole 43(figure that covered structure 49 runs through fusion is mutually the state that has been run through the material institute filling of fusion for the safeguard structure layer 46 of U-shaped inner cavity surface and the expansion of U-shaped opening portion outer circumferential face are extended).The adjacent regions place of edge inside the U-shaped opening of ring-groove-type sealing configuration 4 (as the corresponding site place at inner structure layer 42 end or its end seal structure 47) and running shaft/axle sleeve 9, is provided with the gap structure 48 of the specific cooperation inclined-plane form that can allow the flow clearance 10 that leaking medium passes in and out in the U-shaped chamber of ring-groove-type sealing configuration 4.
Fig. 1 is under normal operation operating mode, state when the non-active parking safety sealing device of said temperature trigger type is not activated.Fig. 3 is (as power outage etc.) while breaking down the unusual service condition causing, and injected water, cooling water stop, and heat shielding lost efficacy, and the refrigerant leaks in High Temperature High Pressure region enters Seal cage, and now main pump stops, and the temperature in Seal cage will constantly raise.This high temperature and/or high-pressure leakage medium that exceedes normal state enters behind the U-shaped chamber of this ring-groove-type sealing configuration 4, due to its external and internal compositions layer 42, 41 linear expansion coeffcient is not etc., inner structure layer 42 is activated and produces larger dilatancy, and oppress external structure layer 41 and deform, after the sealing configuration 47 of the U-shaped cross section opening portion of ring-groove-type sealing configuration is pushed and axle/axle sleeve 9 and the wall of adjacent surrounding structure conflict and fit tightly, realize the high temperature to leaking, the throttling of high pressure or poisonous medium, stop its outflow, and the pressure constantly increasing by continuing to enter the leaking medium of this U-shaped chamber inner chamber, make it further obtain tightr with position gluing, sealings such as axle/axle sleeves 9, ensure the parking sealer state of reliable closure.Accident treatment is complete, system unload, and after temperature is recovered normally, the ring-groove-type sealing configuration 4 in this non-active parking safety seal structure recovers again normal state as shown in Figure 1.
Claims (10)
1. the non-active parking safety sealing device of temperature triggered formula, it is characterized in that being located by connecting between the stationary seal ring (8) and running shaft or axle sleeve (9) of fixed structure (1) outside running shaft or axle sleeve (9) and through rotation prevention structure (7) in Spielpassung, be provided with at least with running shaft or axle sleeve (9) is adjacent and Spielpassung has the ring-groove-type sealing configuration (4) that can be out of shape by temperature triggered of tool U-shaped axial cross section, in this ring-groove-type sealing configuration (4), include with U-shaped face relatively stacked, and two linear expansion coeffcients that interfix at its U-shaped cross section opening portion external and internal compositions layer (42 not etc., 41), wherein the linear expansion coeffcient of inner structure layer (42) is greater than external structure layer (41), at least after the U-shaped cross section of ring-groove-type sealing configuration (4) opening portion is provided with distortion can with its inconsistent sealing configuration (47) of adjacent structure, at the adjacent regions place of U-shaped opening and running shaft or the axle sleeve (9) of ring-groove-type sealing configuration (4), maintain the flow clearance (10) that allows leaking medium to pass in and out in the U-shaped chamber of ring-groove-type sealing configuration (4).
2. the non-active parking safety sealing device of temperature triggered formula as claimed in claim 1, it is characterized in that the said sealing configuration (47) at ring-groove-type sealing configuration (4) U-shaped opening portion, for thering is the extension covered structure (49) to the expansion of opening outer circumferential face at said U-shaped opening portion.
3. the non-active parking safety sealing device of temperature triggered formula as claimed in claim 2, is characterized in that the periphery of extending covered structure (49) in the expansion of the said U-shaped opening portion outer circumferential face position that is sealed and matched is provided with protruding annular seal line (45).
4. the non-active parking safety sealing device of the temperature triggered formula as described in one of claims 1 to 3, is characterized in that the U-shaped inner cavity surface of said inner structure layer (42) in ring-groove-type sealing configuration (4) is coated with safeguard structure layer (46).
5. the non-active parking safety sealing device of temperature triggered formula as claimed in claim 4, is characterized in that the safeguard structure layer (46) of U-shaped inner cavity surface coating of said ring-groove-type sealing configuration (4) and the sealing configuration (47) of U-shaped opening portion are continuous overall structure.
6. the non-active parking safety sealing device of temperature triggered formula as claimed in claim 5, it is characterized in that extending for the expansion at said U-shaped opening portion outer circumferential face the external and internal compositions layer (42 of covered structure (49) institute overlay area in ring-groove-type sealing configuration (4), 41), in, the safeguard structure layer (46) being provided with for making the coating of said U-shaped inner cavity surface extends with the expansion at U-shaped opening portion outer circumferential face the through hole (43) that covered structure (49) runs through fusion mutually.
7. the non-active parking safety sealing device of the temperature triggered formula as described in one of claims 1 to 3, it is characterized in that maintaining at the U-shaped opening part place of ring-groove-type sealing configuration (4) flow clearance (10) that allows leaking medium to pass in and out in the U-shaped chamber of ring-groove-type sealing configuration (4), for the U-shaped opening of running shaft or adjacent ring-groove-type sealing configuration (4) sidewall of axle sleeve (9) inside the gap structure (48) that arranges of edge.
8. the non-active parking safety sealing device of the temperature triggered formula as described in one of claims 1 to 3, is characterized in that the said U-shaped opening of ring-groove-type sealing configuration (4) is towards the high temperature media direction of sealing.
9. the non-active parking safety sealing device of the temperature triggered formula as described in one of claims 1 to 3, it is characterized in that the external and internal compositions layer (42 that in ring-groove-type sealing configuration (4), said linear expansion coeffcient does not wait, 41), for thering is the bimetal ring plate layer of different linear expansion coeffcients.
10. the non-active parking safety sealing device of the temperature triggered formula as described in one of claims 1 to 3, it is characterized in that the ring-groove-type sealing configuration (4) that can be out of shape by temperature triggered of said tool U-shaped axial cross section, be arranged on and running shaft or axle sleeve (9) is adjacent and be fixed in the step hole in the transition structure 5 between stationary seal ring (8) and fixed structure (1) through linkage structure (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039874.3U CN203686145U (en) | 2014-01-22 | 2014-01-22 | Temperature-triggered passive parking safety sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039874.3U CN203686145U (en) | 2014-01-22 | 2014-01-22 | Temperature-triggered passive parking safety sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203686145U true CN203686145U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420039874.3U Withdrawn - After Issue CN203686145U (en) | 2014-01-22 | 2014-01-22 | Temperature-triggered passive parking safety sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203686145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711908A (en) * | 2014-01-22 | 2014-04-09 | 四川日机密封件股份有限公司 | Temperature triggering type passive parking security sealing device |
-
2014
- 2014-01-22 CN CN201420039874.3U patent/CN203686145U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711908A (en) * | 2014-01-22 | 2014-04-09 | 四川日机密封件股份有限公司 | Temperature triggering type passive parking security sealing device |
| CN103711908B (en) * | 2014-01-22 | 2016-04-13 | 四川日机密封件股份有限公司 | The non-active parking safety sealing device of temperature triggered formula |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140702 Effective date of abandoning: 20160413 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |