US20070089283A1 - Intermittent sealing device and method - Google Patents
Intermittent sealing device and method Download PDFInfo
- Publication number
- US20070089283A1 US20070089283A1 US11/582,233 US58223306A US2007089283A1 US 20070089283 A1 US20070089283 A1 US 20070089283A1 US 58223306 A US58223306 A US 58223306A US 2007089283 A1 US2007089283 A1 US 2007089283A1
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- United States
- Prior art keywords
- seal
- seal elements
- elements
- sealing device
- fixing member
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
- F16J15/065—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions fire resistant
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/067—Split packings
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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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/346—Pressing means the pressing force varying during operation
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/063—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends by means of conical threaded surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
- F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
- F28D19/047—Sealing means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/4987—Elastic joining of parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/49874—Prestressing rod, filament or strand
Definitions
- An exemplary embodiment disclosed herein relates to an articulatable sealing device.
- the device includes a plurality of seal elements each of which is urgable against a seal-surface, a fixing member tightenable about a perimeter of the seal elements, and a retractor in operable communication with the plurality of seal elements and able to move the plurality of seal elements in a desired direction.
- the device includes, a plurality of seal elements, and a fixing member for intermittently fixing the seal elements to one another.
- the device further includes a retractor for intermittently retracting the seal elements from contact with a seal-surface, and at least one biasing member to urge each of the plurality of seal elements individually against a seal-surface.
- the method includes, independently urging at least one of a plurality of seal elements toward a seal-surface, intermittently clamping the plurality of seal elements to one another, and intermittently lifting the clamped plurality of seal elements away from the seal-surface.
- the method further includes intermittently releasing the clamp to thereby allow the seal elements to independently move toward and seal against a seal-surface.
- FIG. 1 depicts a perspective view of a regenerator disclosed herein
- FIG. 2 depicts a plan view of a matrix disclosed herein
- FIG. 3 depicts a plan view of a matrix, a plurality of seal elements and a fixing member disclosed herein;
- FIGS. 4A-4D depict perspective views of various stages of actuation of a sealing device disclosed herein;
- FIG. 5 depicts a cross sectional view of the regenerator shown in FIG. 1 ;
- FIG. 6 depicts an exploded perspective view of the sealing device shown in FIG. 1 .
- the regenerator 10 includes a rotatable porous matrix 14 , a fluid-carrying duct 18 and an actuatable seal device 22 .
- the heat exchanger 10 is shown with a single duct 18 and seal device 22 employed; however, it should be understood that more than one duct 18 and seal device 22 may be employed on either or both sides of the matrix 14 while still remaining within the spirit and scope of the present invention.
- the porous matrix 14 of the regenerator 10 has a seal-surface 24 thereon and a plurality of discrete flow compartments 26 ; four such compartments are illustrated in FIG. 1 .
- Surrounding each flow compartment 26 is a seal line 30 .
- Each seal line 30 defines a perimeter around one of the flow compartments 26 on the seal-surface 24 .
- the seal device 22 forms a seal against the seal-surface 24 at the seal line 30 when the seal device 22 is actuated to the seal position.
- the seal line 30 may be in the shape of a circle as shown in FIG. 1 or may be other shapes such as triangular, for example, as is shown by a seal line 32 shown in FIG. 2 .
- each seal element 34 has a female radiused edge 38 and a male radiused edge 42 on a side opposite of the female radiused edge 38 .
- the male edge 42 of one seal element 34 engages with the female edge 38 of an adjacent seal element 34 to form a seal between adjacent seal elements 34 while allowing the adjacent seal elements 34 to move and slide axially relative to one another.
- the shape of each seal element 34 in a seal device 22 , can be identical to all the other seal elements 34 in the seal device 22 if for example the seal line 30 is a circle.
- the seal elements 34 may have various shapes in order to form a non-circular shape, as is the case for the seal line 32 , for example.
- the number of seal elements 34 that are used by each seal device 22 can vary depending upon the particular application. The more seal elements 34 that are used for a given seal line 30 , 32 the more the seal device 22 is able to seal against surfaces with imperfections as will be described below with reference to FIGS. 4A-4D .
- a seal element fixing member illustrated herein as a clamp ring 46 surrounds the perimeter of the seal elements 34 .
- a clamp actuator 50 when actuated pulls the clamp ring 46 into tension around the seal elements 34 , thus putting all of the seal elements 34 that create the closed shape into a circumferentially compressive force with each other seal element 34 in the particular seal device 22 .
- the compressive force between adjacent seal elements 34 creates friction between adjacent seal elements 34 that causes the seal elements 34 to lift together as one assembly when they are lifted away from the matrix 14 .
- the compressive force between adjacent seal elements 34 also creates a seal between adjacent elements 34 thereby preventing leakage therebetween.
- the clamp actuator 50 that tightens the clamp ring 46 may be pneumatic, hydraulic, servomotor controlled or controlled by any other applicable actuation that is known.
- FIGS. 4A-4D various phases of the seal device 22 showing the clamping and releasing of the clamp ring 46 about the seal elements 34 and pulling and pushing of the seal elements 34 relative to the seal-surface 24 are shown in detail.
- the clamp ring 46 is in tension around the seal elements 34 and the seal elements 34 are sealed against the seal line 30 of the matrix 14 .
- the clamp ring 46 has the seal elements 34 locked together as an assembly and can therefore be lifted away from the matrix 14 in the direction of arrows 54 .
- With the seal elements 34 lifted away from the matrix 14 to form a clearance gap 56 as shown in FIG. 4B the matrix 14 is able to move, in direction of arrow 57 for example, relative to the seal elements 34 without causing wear of the seal elements 34 .
- Each of the seal elements 34 is individually biased, in the direction of arrows 60 , toward the matrix 14 such that upon release of the tension in the clamp ring 46 the biasing force urges the individual seal elements 34 to move toward and make contact with the matrix 14 as is shown in FIG. 4C .
- the seal device 22 can permit each seal element 34 to make contact with the matrix 14 . In so doing the largest gaps that will exist between the seal elements 34 and the matrix 14 will be smaller than if the seal elements 34 were not able to move independently of one another. This gap-size reduction of embodiments disclosed herein is especially effective in reducing gap sizes that occur when a distortion 58 exists on the surface of the matrix 14 .
- seal elements 34 allow a single seal element 62 to be axially displaced with respect to the other seal elements 34 due to a local distortion 58 , for example, and thereby to decrease the overall leakage that would result had the seal elements 34 not been allowed to move independently from the seal element 62 towards matrix 14 .
- Embodiments with a greater number of seal elements 34 for a specific size seal line 32 will have smaller gap sizes since fewer seal elements 34 will be held away from the seal-surface 24 by the distortion 58 .
- the actuator 50 can actuate and apply tension to the clamp ring 46 to thereby lock the seal elements 34 together sealing them to one another and preventing movement of any individual seal element 34 in a direction away from the matrix 14 .
- a ring shaped seal guide 70 which is attached to a guide flange 74 , also surrounds and provides guidance to the seal elements 34 .
- the seal guide 70 loosely surrounds the seal elements 34 to allow the seal elements 34 to move freely in an axial direction relative to the seal guide 70 .
- the seal elements 34 ride on an outer surface 78 of the duct 18 and are sealed to the surface 78 with packing 82 .
- the packing 82 is contained within a channel 86 formed circumferentially in the seal elements 34 . Insulation 90 lines the inside of the duct 18 to minimize heat transfer to the seal device 22 .
- seal guide 70 is stationary relative to the duct 18 and thus the seal elements 34 move relative to the seal guide 74 .
- the seal guide 74 can have a noncircular shape to control the shape of the seal elements 34 such that they form a noncircular seal shape such as would be required to seal against seal line 32 as shown in FIG. 2 .
- the duct 18 may also have a noncircular shape to complement the shape of the seal guide 74 .
- each push-rod 108 has a push-rod biasing member depicted herein as a compression spring 126 compressed between the support plate 122 and a flange 130 on the push-rods 108 .
- the compression spring 126 is always in compression and is thereby supplying an urging force to the seal element 34 to which it is engaged in a direction toward the matrix 14 .
- the push-rods 108 engage recesses 134 in the seal elements 34 to positively locate the push-rods 108 relative to the seal elements 34 .
- Each pull rod 104 is connected to a seal element retractor illustrated herein as an axial actuator 138 that when actuated pulls the pull rod 104 in a direction away from the matrix 14 .
- the axial actuator 138 may be pneumatic, hydraulic, servomotor controlled or controlled by any other applicable actuation that is known.
- a head 142 on each rod 104 on the opposite end of the rod 104 than is connected to the actuator 138 , engages with a latch 146 fixed on the clamp ring 46 .
- pull rods 104 and actuators 138 can be positioned around the seal guide 74 and support plate 122 to evenly distribute the load of the rods 104 on the clamp ring 46 to thereby control the motion of the clamp ring 46 resulting from the forces applied thereto.
- Alternate embodiments could have the pull rods 104 engaged directly to one or more of the seal elements 34 . Since the seal elements 34 are secured to one another by the clamp ring 46 retracting the pull rods 104 with the actuator 138 would retract all of the seal elements 34 as well.
- the temperatures of the fluid being sealed could be very high.
- the hot fluid temperatures may be high enough to damage the springs 126 and the actuators 138 if they are located near the seal-surface 24 during times when the seal elements 34 are at the gap 56 distance from the seal-surface 24 .
- the lengths of the pull rods 104 and the push-rods 108 may therefore be customized for each application, such that longer rods 104 , 108 are used for applications with higher-temperature fluids, for example, to thereby protect the springs 126 and the actuators 138 from heat damage.
- seal elements 34 made from materials such as ceramic, for example, such that the seal elements 34 may withstand the high temperatures without sustaining damage.
- the push-rods 108 in response to the clamp actuator 50 releasing the tension in the clamp ring 46 are able to push the seal elements 34 , individually, into contact with the seal-surface 24 of the matrix 14 .
- the pull rods 104 are able to pull all of the seal elements 34 simultaneously away from the seal-surface 24 of the matrix 14 in response to the clamp actuator 50 applying tension to the clamp ring 46 . After this action the seal elements 34 are no longer in contact with the matrix 14 allowing the matrix 14 to move without causing wear of the seal elements 34 .
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
An exemplary embodiment disclosed herein relates to an articulatable sealing device. The device includes a plurality of seal elements each of which is urgable against a seal-surface, a fixing member tightenable about a perimeter of the seal elements, and a retractor in operable communication with the plurality of seal elements and able to move the plurality of seal elements in a desired direction.
Description
- This application claims priority to U.S. provisional application, 60/728,991, filed Oct. 21, 2005, the entire contents of which are incorporated herein by reference.
- Seal arrangements between two members, which are in movement relative to each other, are known in the arts. But at high temperatures, above 500° C. for example, and applications where the leakage across the seal has to be minimal, of the order of 0.1% to 3.0%, over an extended lifecycle many of the conventional sealing mechanisms cannot comply with these requirements. One example of such an application is a regenerative heat exchanger (regenerator) in which a porous disk or drum is first rotated into a hot fluid flow and second into a cold fluid flow to thereby transfer heat from the hot fluid to the cold fluid. To minimize the wear of the seals in contact with the moving regenerator disk a discontinuous moving regenerator disk, with lifting seals, has been used. A description of such a regenerator can be found in U.S. Pat. No. RE37134 to David Gordon Wilson, which is included as a reference in its entirety herein. In some regenerator applications the mixing of the cold and the hot fluid is troublesome and should, therefore, be minimized. Such a mixing of hot and cold fluids results from leakage by the seals between the two fluids. In applications using lifting seals in discontinuous regenerators, the leakage, though low, may still be greater than desired due to distortions in the seal-surface. Such distortions may hold the lifting seals far enough from the seal-surface to permit unacceptable levels of leakage to occur. Accordingly, improvements in sealing in the presence of such seal-surface distortions would be desirable in the art.
- An exemplary embodiment disclosed herein relates to an articulatable sealing device. The device includes a plurality of seal elements each of which is urgable against a seal-surface, a fixing member tightenable about a perimeter of the seal elements, and a retractor in operable communication with the plurality of seal elements and able to move the plurality of seal elements in a desired direction.
- Further disclosed herein relates to an articulatable sealing device. The device includes, a plurality of seal elements, and a fixing member for intermittently fixing the seal elements to one another. The device further includes a retractor for intermittently retracting the seal elements from contact with a seal-surface, and at least one biasing member to urge each of the plurality of seal elements individually against a seal-surface.
- Further disclosed herein is an exemplary embodiment of a method of intermittently sealing to a surface. The method includes, independently urging at least one of a plurality of seal elements toward a seal-surface, intermittently clamping the plurality of seal elements to one another, and intermittently lifting the clamped plurality of seal elements away from the seal-surface. The method further includes intermittently releasing the clamp to thereby allow the seal elements to independently move toward and seal against a seal-surface.
- The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
-
FIG. 1 depicts a perspective view of a regenerator disclosed herein; -
FIG. 2 depicts a plan view of a matrix disclosed herein; -
FIG. 3 depicts a plan view of a matrix, a plurality of seal elements and a fixing member disclosed herein; -
FIGS. 4A-4D depict perspective views of various stages of actuation of a sealing device disclosed herein; -
FIG. 5 depicts a cross sectional view of the regenerator shown inFIG. 1 ; and -
FIG. 6 depicts an exploded perspective view of the sealing device shown inFIG. 1 . - A detailed description of embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
- Referring to
FIG. 1 an embodiment of the invention will now be had with reference to a discontinuous regenerator shown generally at 10. Theregenerator 10 includes a rotatableporous matrix 14, a fluid-carryingduct 18 and anactuatable seal device 22. Theheat exchanger 10 is shown with asingle duct 18 andseal device 22 employed; however, it should be understood that more than oneduct 18 andseal device 22 may be employed on either or both sides of thematrix 14 while still remaining within the spirit and scope of the present invention. - The
porous matrix 14 of theregenerator 10 has a seal-surface 24 thereon and a plurality ofdiscrete flow compartments 26; four such compartments are illustrated inFIG. 1 . Surrounding eachflow compartment 26 is aseal line 30. Eachseal line 30 defines a perimeter around one of theflow compartments 26 on the seal-surface 24. Theseal device 22 forms a seal against the seal-surface 24 at theseal line 30 when theseal device 22 is actuated to the seal position. Theseal line 30 may be in the shape of a circle as shown inFIG. 1 or may be other shapes such as triangular, for example, as is shown by aseal line 32 shown inFIG. 2 . There are limitations on the shapes that theseal lines seal device 22 that will be discussed in more detail now. - Referring again to
FIG. 2 , theseal device 22 uses a plurality ofseal elements 34 to form the seal against theseal line 30 on the seal-surface 24 as is shown in this partial cross sectional view of theseal elements 34. In this embodiment eachseal element 34 has a femaleradiused edge 38 and a maleradiused edge 42 on a side opposite of the femaleradiused edge 38. Themale edge 42 of oneseal element 34 engages with thefemale edge 38 of anadjacent seal element 34 to form a seal betweenadjacent seal elements 34 while allowing theadjacent seal elements 34 to move and slide axially relative to one another. The shape of eachseal element 34, in aseal device 22, can be identical to all theother seal elements 34 in theseal device 22 if for example theseal line 30 is a circle. Alternatively, theseal elements 34 may have various shapes in order to form a non-circular shape, as is the case for theseal line 32, for example. The number ofseal elements 34 that are used by eachseal device 22 can vary depending upon the particular application. Themore seal elements 34 that are used for a givenseal line seal device 22 is able to seal against surfaces with imperfections as will be described below with reference toFIGS. 4A-4D . - Referring to
FIG. 3 a seal element fixing member illustrated herein as aclamp ring 46 surrounds the perimeter of theseal elements 34. Aclamp actuator 50 when actuated pulls theclamp ring 46 into tension around theseal elements 34, thus putting all of theseal elements 34 that create the closed shape into a circumferentially compressive force with eachother seal element 34 in theparticular seal device 22. The compressive force betweenadjacent seal elements 34 creates friction betweenadjacent seal elements 34 that causes theseal elements 34 to lift together as one assembly when they are lifted away from thematrix 14. The compressive force betweenadjacent seal elements 34 also creates a seal betweenadjacent elements 34 thereby preventing leakage therebetween. Theclamp actuator 50 that tightens theclamp ring 46 may be pneumatic, hydraulic, servomotor controlled or controlled by any other applicable actuation that is known. - Referring to
FIGS. 4A-4D various phases of theseal device 22 showing the clamping and releasing of theclamp ring 46 about theseal elements 34 and pulling and pushing of theseal elements 34 relative to the seal-surface 24 are shown in detail. InFIG. 4A theclamp ring 46 is in tension around theseal elements 34 and theseal elements 34 are sealed against theseal line 30 of thematrix 14. Theclamp ring 46 has theseal elements 34 locked together as an assembly and can therefore be lifted away from thematrix 14 in the direction ofarrows 54. With theseal elements 34 lifted away from thematrix 14 to form aclearance gap 56 as shown inFIG. 4B thematrix 14 is able to move, in direction ofarrow 57 for example, relative to theseal elements 34 without causing wear of theseal elements 34. Each of theseal elements 34 is individually biased, in the direction ofarrows 60, toward thematrix 14 such that upon release of the tension in theclamp ring 46 the biasing force urges theindividual seal elements 34 to move toward and make contact with thematrix 14 as is shown inFIG. 4C . By individually urging each of theseal elements 34 theseal device 22 can permit eachseal element 34 to make contact with thematrix 14. In so doing the largest gaps that will exist between theseal elements 34 and thematrix 14 will be smaller than if theseal elements 34 were not able to move independently of one another. This gap-size reduction of embodiments disclosed herein is especially effective in reducing gap sizes that occur when adistortion 58 exists on the surface of thematrix 14. The use ofmultiple seal elements 34 allows asingle seal element 62 to be axially displaced with respect to theother seal elements 34 due to alocal distortion 58, for example, and thereby to decrease the overall leakage that would result had theseal elements 34 not been allowed to move independently from theseal element 62 towardsmatrix 14. Embodiments with a greater number ofseal elements 34 for a specificsize seal line 32 will have smaller gap sizes sincefewer seal elements 34 will be held away from the seal-surface 24 by thedistortion 58. Once all theseal elements matrix 14 theactuator 50 can actuate and apply tension to theclamp ring 46 to thereby lock theseal elements 34 together sealing them to one another and preventing movement of anyindividual seal element 34 in a direction away from thematrix 14. - Referring to
FIGS. 1, 5 and 6 a detailed description of theseal device 22 and the mechanisms to control the movements of theseal elements 34 will now be described. In addition to the clamp ring 46 a ring shapedseal guide 70, which is attached to aguide flange 74, also surrounds and provides guidance to theseal elements 34. The seal guide 70 loosely surrounds theseal elements 34 to allow theseal elements 34 to move freely in an axial direction relative to theseal guide 70. Theseal elements 34 ride on anouter surface 78 of theduct 18 and are sealed to thesurface 78 with packing 82. The packing 82 is contained within achannel 86 formed circumferentially in theseal elements 34.Insulation 90 lines the inside of theduct 18 to minimize heat transfer to theseal device 22. For sealing between theduct 18 and theseal elements 34 known methods such as 0-rings, for example, can be used if appropriate to the particular application. Theseal guide 70 is stationary relative to theduct 18 and thus theseal elements 34 move relative to theseal guide 74. - The
seal guide 74 can have a noncircular shape to control the shape of theseal elements 34 such that they form a noncircular seal shape such as would be required to seal againstseal line 32 as shown inFIG. 2 . Theduct 18 may also have a noncircular shape to complement the shape of theseal guide 74. There are limits to the shapes that theseal line 32 and consequently theseal device 22 can take, however, which are due to the possibility of theseal elements seal elements seal elements seal line 32 to prevent such a buckling from occurring. - As described above the
seal elements 34 move in both axial directions, specifically toward and away from thematrix 14.Holes guide flange 74 permit pullrods 104 and push-rods 108 respectively to extend therethrough to urge the motion of the seal elements in the two directions. The push-rods 108 are also slidably engaged inholes 118 in anactuation support plate 122 that is attached to theduct 18 further from the location where theseal guide 74 is fixed to theduct 18. Each push-rod 108 has a push-rod biasing member depicted herein as acompression spring 126 compressed between thesupport plate 122 and aflange 130 on the push-rods 108. Thus thecompression spring 126 is always in compression and is thereby supplying an urging force to theseal element 34 to which it is engaged in a direction toward thematrix 14. The push-rods 108 engagerecesses 134 in theseal elements 34 to positively locate the push-rods 108 relative to theseal elements 34. - Each
pull rod 104 is connected to a seal element retractor illustrated herein as anaxial actuator 138 that when actuated pulls thepull rod 104 in a direction away from thematrix 14. Theaxial actuator 138 may be pneumatic, hydraulic, servomotor controlled or controlled by any other applicable actuation that is known. Ahead 142 on eachrod 104, on the opposite end of therod 104 than is connected to theactuator 138, engages with alatch 146 fixed on theclamp ring 46. Thus, when theactuator 138 is actuated thepull rod 104 pulls theclamp ring 46 in a direction away from thematrix 14. Several pullrods 104 andactuators 138 can be positioned around theseal guide 74 andsupport plate 122 to evenly distribute the load of therods 104 on theclamp ring 46 to thereby control the motion of theclamp ring 46 resulting from the forces applied thereto. Alternate embodiments could have thepull rods 104 engaged directly to one or more of theseal elements 34. Since theseal elements 34 are secured to one another by theclamp ring 46 retracting thepull rods 104 with theactuator 138 would retract all of theseal elements 34 as well. - Depending upon the particular application employing the
regenerator 10 disclosed herein, the temperatures of the fluid being sealed could be very high. For example in a gas turbine engine the hot fluid temperatures may be high enough to damage thesprings 126 and theactuators 138 if they are located near the seal-surface 24 during times when theseal elements 34 are at thegap 56 distance from the seal-surface 24. To protect thesprings 126 and theactuators 138, therefore, it may be desirable to locate thesprings 126 and theactuators 138 at specific distances from these high-temperature locations. The lengths of thepull rods 104 and the push-rods 108 may therefore be customized for each application, such thatlonger rods springs 126 and theactuators 138 from heat damage. In applications with high temperatures it may be advantageous to useseal elements 34 made from materials such as ceramic, for example, such that theseal elements 34 may withstand the high temperatures without sustaining damage. - With the construction just described the push-
rods 108 in response to theclamp actuator 50 releasing the tension in theclamp ring 46 are able to push theseal elements 34, individually, into contact with the seal-surface 24 of thematrix 14. Additionally, thepull rods 104 are able to pull all of theseal elements 34 simultaneously away from the seal-surface 24 of thematrix 14 in response to theclamp actuator 50 applying tension to theclamp ring 46. After this action theseal elements 34 are no longer in contact with thematrix 14 allowing thematrix 14 to move without causing wear of theseal elements 34. - While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims.
Claims (20)
1. An articulatable sealing device, comprising:
a plurality of seal elements each of which is urgable against a seal-surface;
a fixing member tightenable about a perimeter of the seal elements; and
a retractor in operable communication with the plurality of seal elements and able to move the plurality of seal elements in a desired direction.
2. The sealing device of claim 1 , further comprising:
at least one biasing member to urge the plurality of seal elements.
3. The sealing device of claim 1 , wherein the retractor is engaged with the fixing member.
4. The sealing device of claim 1 , wherein the retractor is engaged with at least one of the plurality of seal elements.
5. The sealing device of claim 1 , wherein each seal element of the plurality of seal elements has an arcuate male edge and an arcuate female edge and the arcuate male edge is on a side of the seal element opposite the side with the arcuate female edge and the arcuate male edge of one seal element is engagable with the arcuate female edge of an adjacent seal element and is sealable thereto.
6. The sealing device of claim 1 , wherein tightening of the fixing member around the perimeter of the plurality of seal elements fixes the seal elements to one another.
7. The sealing device of claim 1 , further comprising:
a clamp actuator for tightening the fixing member about the perimeter of the plurality of seal elements.
8. The sealing device of claim 1 , wherein the plurality of seal elements are slidable relative to one another in response to the fixing member not being tightened.
9. The sealing device of claim 1 , further comprising:
a seal guide for orienting the plurality of seal elements into a seal shape.
10. The sealing device of claim 1 , wherein the plurality of seal elements are shaped to form a desired seal line shape.
11. The sealing device of claim 1 , wherein the plurality of seal elements seal to one another forming a closed shape sealable to a duct.
12. The sealing device of claim 1 , wherein the plurality of seal elements are made of ceramic.
13. The sealing device of claim 1 , wherein the number of seal elements in the seal device is selected to minimize leakage between the seal device and a seal-surface.
14. The sealing device of claim 1 , further comprising:
a plurality of push-rods sized to communicate the urging force of the at least one biasing member to the plurality of seal elements while preventing excess heat from reaching the at least one biasing member.
15. The sealing device of claim 1 , further comprising:
at least one pull rod sized to communicate an urging force of the retractor to the fixing member while preventing excess heat from reaching the retractor.
16. An articulatable sealing device, comprising:
a plurality of seal elements;
a fixing member for intermittently fixing the seal elements to one another;
a retractor for intermittently retracting the seal elements from contact with a seal-surface; and
at least one biasing member to urge each of the plurality of seal elements individually against a seal-surface.
17. A method of intermittently sealing to a surface, comprising:
independently urging at least one of a plurality of seal elements toward a seal-surface;
intermittently clamping the plurality of seal elements to one another;
intermittently lifting the clamped plurality of seal elements away from the seal-surface; and
intermittently releasing the clamp to thereby allow the seal elements to independently move toward and seal against a seal-surface.
18. The method of claim 17 , further comprising:
sealing the plurality of seal elements to one another to form a perimeter defining a closed shape.
19. The method of claim 17 , further comprising:
moving the lifted and clamped seal elements relative to a seal-surface prior to releasing the clamp.
20. The method of claim 17 , further comprising:
individually shaping the plurality of seal elements to form a desired closed shape.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/582,233 US20070089283A1 (en) | 2005-10-21 | 2006-10-17 | Intermittent sealing device and method |
US13/033,538 US8511688B2 (en) | 2005-10-21 | 2011-02-23 | Intermittent sealing device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72899105P | 2005-10-21 | 2005-10-21 | |
US11/582,233 US20070089283A1 (en) | 2005-10-21 | 2006-10-17 | Intermittent sealing device and method |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/033,538 Continuation US8511688B2 (en) | 2005-10-21 | 2011-02-23 | Intermittent sealing device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070089283A1 true US20070089283A1 (en) | 2007-04-26 |
Family
ID=37762708
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US11/582,233 Abandoned US20070089283A1 (en) | 2005-10-21 | 2006-10-17 | Intermittent sealing device and method |
US13/033,538 Active US8511688B2 (en) | 2005-10-21 | 2011-02-23 | Intermittent sealing device |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/033,538 Active US8511688B2 (en) | 2005-10-21 | 2011-02-23 | Intermittent sealing device |
Country Status (2)
Country | Link |
---|---|
US (2) | US20070089283A1 (en) |
WO (1) | WO2007047910A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US20120018955A1 (en) | 2012-01-26 |
US8511688B2 (en) | 2013-08-20 |
WO2007047910A1 (en) | 2007-04-26 |
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Legal Events
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AS | Assignment |
Owner name: WILSON TURBOPOWER, INC., MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WILSON, DAVID GORDON;BALLOU, JON M.;REEL/FRAME:018436/0748 Effective date: 20061016 |
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AS | Assignment |
Owner name: WILSON SOLARPOWER CORPORATION, MASSACHUSETTS Free format text: CHANGE OF NAME;ASSIGNOR:WILSON TURBOPOWER, INC.;REEL/FRAME:024985/0277 Effective date: 20100707 |
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STCB | Information on status: application discontinuation |
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