JP4417742B2 - Sealing device - Google Patents

Description

  The present invention relates to a sealing device that is attached to a mounting space of an assembly part that involves displacement due to heat or displacement due to external force. In particular, the present invention relates to a sealing device provided in an attachment space of an assembly part that changes a gap in the attachment space by an external force or displacement due to heat.

  In recent years, in rocket engines, gas turbine engines, nuclear steam turbines, etc., preventing combustion gas, steam gas, cooling gas, etc. from leaking from the stator is effective in improving the thermal efficiency of the engine. Are known. However, in the conventional sealing device technology, these various effects act on the stator due to the structure of the turbine, from the influence of heating temperature, from the influence of pressure, and from the influence of vibration force. Therefore, the mounting space of the stator has changed greatly, and it has been difficult to improve the sealing ability. For this reason, improvement of the technology of this sealing device has been a problem.

  As a related art of the present invention, a seal ring or a brush seal device that seals between joints of mounting parts of a turbine engine is known. In the turbine engine, this seal ring is attached to a location where the joint between the attachment parts is displaced by high-temperature combustion gas, compressed gas, or vibration force (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). ).

  The seal ring 120 in FIG. 15 is similar to the seal ring disclosed in FIG. In FIG. 15, the seal ring 120 is a ring body having a U-shaped cross section. Further, both ends of the U-shaped seal ring 120 are formed in reverse bent portions 132 and 132, and grooves 134 and 134 are formed in the inner circumferences of the reverse bent portions 132 and 132, respectively. Further, the seal ring 120 is a double layer consisting of an inner ring 122 and an outer ring 126. In addition, the inner circumference of the inner ring 122 is formed in a large U space 135.

  And the seal ring 120 is attached in order to seal the nozzle 110 of the high pressure turbine of a gas turbine. The nozzle 110 of the high pressure turbine is provided with a plurality of nozzle vanes 112. The nozzle vane 112 is integrally attached to the radially inner band 116 disposed on the support flange 118. A seal ring 120 is attached between the inner band 116 and the support flange 118 to hermetically join the inner band 116 of the high pressure turbine nozzle 110 to the support flange 118.

  The high-pressure turbine nozzle 110 is accelerated while a high-temperature combustion gas 114 sent from a combustion chamber provided upstream (not shown) is rotated through a nozzle vane 112. For this reason, the inner band 116 and the supporting flange 118 are subject to deformation due to heat with heating time. The seal ring 120 attached between the inner band 116 and the supporting flange 118 that undergoes deformation due to heat is elastically deformed in the joining direction (axial direction) due to the deformation of the inner band 116 and the supporting flange 118 due to heat. At this time, the seal ring 120 has a U-shaped bending center contact point 125 supported by the supporting flange 118.

  At the same time, in the seal ring 120, the reverse bent portions 132, 132 contact the inner band 116 and the supporting flange 118, and the two grooves 134, 134 between the axial directions of the reverse bent portions 132, 132 and one A U space 135 is provided continuously. For this reason, when high-temperature and high-pressure gas acts on the outer peripheral surface of the reverse bent portion 132 on the gas entry side A, the seal ring 120 is elastically deformed and it is difficult to seal the seal surfaces 132A and 132B with a uniform contact force. become.

  In addition, since the outer peripheral ring 126 is fitted on the outer periphery of the inner ring 122, this manufacturing becomes difficult. Furthermore, since the reverse bent portions 132 and 132 are formed at both opening ends of the U space, the entire bending process becomes difficult, and the processing cost increases. Furthermore, when the diameter of the seal ring 120 is increased, the press die is increased, so that the die cost is increased. Further, when the press die becomes large, the press machine has to be enlarged, which causes a problem of increasing the equipment cost.

Japanese translation of PCT publication No. 2002-523712 (FIG. 1) US Pat. No. 5,249,814 (FIG. 2 seal ring 46) JP 9-512607 A (Brush seals 52 and 54 in FIG. 1)

  The present invention has been made in view of the above problems. A problem to be solved by the present invention is to exhibit sealing ability over a wide displacement range even when the width of the mounting space in which the sealing device is mounted is displaced by fluid pressure, thermal stress, or the like. Furthermore, even if the sealing device has a large diameter, the cost of the press working mold and the molding press machine is reduced. In addition, it is possible to easily manufacture regardless of the outer diameter of the sealing device, and to reduce the processing cost. Further, it is to facilitate the mounting of the seal device and reduce the assembly cost.

The present invention has been made to solve the technical problems as described above, and the technical solution means is configured as follows.
A sealing device according to a first aspect of the present invention is a sealing device for sealing between assembly parts, one first seal part obtained by bending a rectangular thin plate in close contact with one part of the assembly part, and the other of the assembly parts. A seal plate having the other bent second seal portion in close contact with the component, and an elastic bent portion formed between the first seal portion and the second seal portion, and each seal plate joined to the bent inner side in parallel And a connecting portion for connecting the stacked elastic bent portions, and the surfaces of the stacked elastic bent portions are in close contact with each other .

In the sealing device of the invention according to claim 2, the elastic bent portion of the seal plate is formed in a W shape by being bent into irregularities, and the surfaces of the stacked elastic bent portions are in close contact with each other along the arrangement. Is.

  In the sealing device according to a third aspect of the present invention, the coupling portion is formed by welding the end surface in the width direction of the elastic bending portion.

According to a fourth aspect of the present invention, there is provided a seal device for sealing between assembly parts, a seal plate having a first seal portion formed in a rectangular thin plate and in close contact with one part of the assembly part, and a seal A push seal plate that has a first seal portion that is arranged in the middle of stacking the plates in parallel and is in intimate contact with one of the assembly components and that has an elastic pressing portion that is in pressure contact with the other component of the assembly component. A connecting portion for connecting the seal plate and the push seal plate in parallel, and the parallel surface on the first contact portion side of the first seal portion is close to or close to the surface of the one part. is there.

  In the sealing device of the invention according to claim 5, the coupling portion has a through hole penetrating the seal plate and the push seal plate in the parallel direction, and passes through the through hole of each seal plate and the push seal plate. And a push rod that connects the push seal plate.

In the sealing device according to the first aspect of the present invention, a plurality of seal plates formed by bending a rectangular plate into a V shape are arranged in the V direction. The elastic bent portions bent in the V shape of the respective seal plates are connected in close contact with each other in the arrangement direction. Since this seal plate is overlapped so that the V shape fits in the V direction, the arrangement of the seal plates becomes extremely easy and the arrangement does not shift, so that the assembly cost can be reduced. In addition, even if a displacement such as vibration occurs in the mounting space of the assembly part, the sealing plate is not displaced, so that the sealing ability is improved. Furthermore, since the sealing device is formed by arranging the sealing plates, it can be easily manufactured by a linear sealing device, a curved sealing device, or an annular sealing device. Thus, production costs can be reduced.

  In addition, since the contact surfaces of the elastic bent portions are in close contact with each other in the arrangement direction, the sealed fluid that crosses the contact surfaces is sealed. For this reason, the sealing capability of the sealing device is dramatically improved. Furthermore, since the elastic bent portions are connected, the respective seal portions on both sides of the elastic bent portions are easily elastically deformed, and are subject to displacement due to thermal stress, vibration, etc. in the mounting space of the mounting part to which the seal device is mounted. The seal portion is elastically deformed, and the sealing ability can be increased.

In the sealing device according to the second aspect of the present invention, since the elastic bent portion is bent into an uneven shape and formed into a W shape , the elastic force of the elastic bent portion is improved, and each seal on both sides of the elastic bent portion is improved. The elastic deformation of the part increases. For this reason, even if the mounting surface of the assembly part is displaced due to thermal stress, vibration force or the like, the seal portion is greatly elastically deformed and can always be in close contact between the assembly parts. Further, by forming in the W-shaped elastic bent portion, the surfaces of the stacked elastic bent portions are ensured, so that the sealing ability of the fluid to be sealed across the elastic bent portion is improved.

  In the sealing device according to the third aspect of the present invention, since both end portions in the width direction of the elastic bending portion are laminated in the arrangement direction, welding can be reliably performed even if welding is performed. For this reason, manufacture becomes easy and manufacturing cost can be reduced. In addition, since both ends of the elastic bending portion are welded to form the coupling portion, the base of the seal portion is supported by the coupling portion, and the elastic deformation of the contact portion at the free end is facilitated. For this reason, the sealing capability of each contact part improves.

In the sealing device according to the fourth aspect of the present invention, since the push seal plate is mixed in the middle of the arranged seal plates, it is pressed against the mounting space by the elastic force through the coupling portion by the elastic bending portion. Is possible. In particular, the sealing device in which the entire sealing device is elastically supported by the elastic bending portion can closely contact the arrangement surface of the contact portions in the first sealing portion even when the sealing device is formed in an annular shape or a linear shape. Become. For this reason, the ability to seal the fluid to be sealed due to the close contact of the arrangement surface can be improved. Furthermore, by adjusting the length of the elastic bent portion of the push seal plate, it is possible to mount it to exhibit sealing ability regardless of whether the mounting space is large or small.

  In the sealing device according to the fifth aspect of the present invention, since the coupling portion is configured as a through-rod and the sealing plate is connected, when arranging the sealing device in an annular shape, the arrangement surface of the inner peripheral side contact portion is easy. It becomes possible to be in close contact with. For this reason, the sealing capability of the sealing device can be improved. Moreover, even if it is an annular sealing device, it is easy to manufacture the sealing device, and even if it has a complicated structure such as a mounting portion of a gas turbine, it is easy to mount the sealing device, and the assembly cost is reduced. it can.

  Hereinafter, a sealing device according to an embodiment of the present invention will be described in detail with reference to the drawings. Each drawing described below is an accurate drawing based on the design drawing.

FIG. 1 is a cross-sectional view of a sealing device 1 in an attached state showing a preferred first embodiment according to the present invention, and shows a front surface of a sealing plate 2. In FIG. 1, a sealing device 1 is arranged so that each sealing plate 2 formed in a V shape is in close contact with the inner surface of the V shape and is annular in the arrangement direction. The sealing device 1 is provided in a mounting space of an assembly part that receives the action of a high-pressure and high-temperature fluid such as a gas turbine engine or nuclear equipment. For example, the sealing device 1 can be provided in a mounting space between an inner casing and an outer casing of a gas turbine or a shroud support and a duct through which combustion gas passes, or a component connected to an injector component. This assembly component is subjected to thermal stress, pressure of the sealed fluid, vibration, and the like.

The sealing device 1 is disposed in a mounting space 50 between an injector component 51 and a side plate 52 of a gas turbine. Since FIG. 1 is a cross-sectional view, description will be made with reference to the front view of FIG. 3 having a shape similar to that of FIG. The injector component 51 is provided with a side surface 51A and a peripheral surface 51B that form stepped portions, and the fixing ring 20 is detachably locked to the mounting groove on the side surface 51A. Further, the side plate 52 is provided with a flange surface 52A and a circumferential surface 52B formed in a stepped shape. Further, a joint surface 52C that is slidably in close contact with the peripheral surface 51B of the injector component 51 is provided. The mounting space 50 is deformed when subjected to thermal stress or vibration force.

  The sealing plate 2 in the sealing device 1 bends a rectangular thin plate into a V shape within an angle range of 70 ° to 120 ° from the middle. Since the bending angle is determined in consideration of the pressure of the fluid to be sealed, the arrangement of the sealing plate 2, and the like, it is not limited to the range of 70 ° to 120 °. In this embodiment, the V-shaped bending angle is 80 °. The thickness of the seal plate 2 is approximately 0.08 mm. The thickness range of the seal plate 2 is 0.02 mm to 1 mm. Since this thickness is also determined according to the size of the sealing device 1, the pressure of the sealed fluid, etc., it is not limited to the above thickness. The bent portion of the seal plate 2 is formed in an elastic bent portion 3 (the whole array of the seal plates 2 is also called an elastic bent portion) 3. The elastic bent portion 3 is bent into a W shape and formed into a first bent portion 3A and a second bent portion 3B. The seal plate 2 is formed on the first seal portion plate 2A1 inclined from the first bent portion 3A toward the free end. The seal plate 2 is formed on the second seal portion plate 2B1 inclined from the second bent portion 3B toward the free end.

  The seal plate 2 is made of a nickel base alloy material. A specific example is 76% Ni-16% Cr-8% Fe alloy Inconel. This Inconel is rich in workability, can be hot and cold worked, and has excellent corrosion resistance. In addition, the seal plate 2 may be a stainless steel plate, a ceramic plate, Hastelloy X, Haynes alloy 25, or a resin composite in the case of a low temperature. If necessary, the seal plate 2 may be surface-treated with gold, silver, nickel, or copper.

The sealing device 1 is arranged so as to be closely annular so that each sealing plate 2 is inserted into the V shape of each other. In this arrangement of the seal plates 2, the overlapping surfaces on which the W-shaped elastic bent portions 3 are arranged are in close contact with each other, but the arrangement surfaces of the first seal portion plates 2 </ b> A <b> 1 and the respective second seal portion plates The array surface of 2B1 is close to the minute gap. Further, welding is performed along the elastic bent portions 3 at both end surfaces in the width direction of the seal plates 2 arranged in an annular shape, and the seal plates 2 are formed in the joint portions 5 and 5 to be joined. The free end peripheral surface of the first seal portion 2A is formed in the first contact portion 2C. The first contact portions 2C are arranged in an annular shape and are brought into close contact with the flange surface 52A. Further, the free end peripheral surface of the second seal portion 2B is formed in the second contact portion 2D. The second contact portion 2D is also arranged in a ring shape and is brought into close contact with the side surface 51A. Further, one end surface in the width direction of the seal plate 2 is formed on the first side surface 2E of the annular plane, and the first side surface 2E is slidably brought into close contact with the inner peripheral surface 20B of the fixing ring 20. Further, the other end surface in the width direction of the seal plate 2 is formed on the second side surface 2F of the annular plane, and is slidably brought into close contact with the circumferential surface 52B.

The sealing device 1 configured as described above is mounted in the mounting space 50. In the sealing device 1, a sealed fluid acts from the high pressure side P1 side. The sealed fluid is blocked by the first side surface 2E of the first seal portion 2A. At the same time, the sealed fluid enters between the seal portion 2A is sealed by both the heavy contact surface in close to the W-shaped resilient bent portion 3 (the surface on which the elastic bending section 3 of FIG. 4 are in close contact with the W-shaped) . Accordingly, the sealed fluid flowing from the high pressure side P1 to the low pressure side P2 is blocked. Furthermore, even if the injector component 51 and the side plate 52 are relatively displaced in the axial direction, the first seal portion 2A and the second seal portion 2B can be elastically deformed with the elastic bent portion 3 as a fulcrum. And elastically deforming corresponding to the relative displacement of the side plate 52. The first contact portion 2C is in close contact with the flange surface 52A, and the second contact portion 2D is in close contact with the side surface 51A and exhibits sealing ability. In addition, since the sealing device 1 is arranged so that each sealing plate 2 is inserted into the V shape, it can be arranged in any shape regardless of whether it is annular or corrugated (conventional rectangular shape). There is a plate brush seal in which the thin plates are arranged in an annular shape, but this arrangement is extremely difficult because the thin plates are displaced. For this reason, an assembly cost becomes low with a manufacturing cost. Further, since the sealing device 1 has a large diameter when the sealing plate 2 is arranged in an annular shape regardless of the size of the diameter, even if the diameter is large, the die cost for pressing can be reduced.

  FIG. 2 is a partial front view of the mounting state of the sealing device 1 showing the second embodiment of the present invention. The sealing device 1 has sealing plates 2 arranged in a straight line. This sealing device 1 is mounted between assembly parts of a shroud segment of a gas turbine. The first assembly component 61 is provided with a joining surface 61A and a support surface 61B that form a stepped shape. The second assembly part 62 is provided with a flat joining surface 62A. A mounting space 60 is formed by the stepped surface formed by the joint surface 61A and the support surface 61B and the joint surface 62A. Then, the sealing device 1 is mounted in the mounting space 60 between the first assembly part 61 and the second assembly part 62.

  The seal plate 2 is formed by bending a thin plate rectangle at about 90 °. This bent portion is formed in the W-shaped elastic bent portion 3. The seal plate 2 is stainless steel and has a thickness of 0.12 mm. The overall configuration of the seal plate 2 shown in FIG. 2 is substantially the same as that of FIG. The seal plates 2 are arranged in a row so as to be fitted into the V shape. Then, the arranged seal plates 2 are joined by the joint portion 5 welded along the elastic bent portion 3. The first seal portion 2A has an arrangement surface of the seal plate 2 formed at a minute interval, and even if the first assembly component 61 and the second assembly component 62 are displaced, they are elastically deformed to correspond to the displacement dimension. Is possible. Others are arranged in the same manner as in FIG. 2 that are the same as those in FIG. 1 or 3 are the same components. Further, the sealing device 1 is slidably held between the fixed plate 20 fixed to the first assembly component 61 and the first assembly component 61 so that the sealing device 1 does not fall off even when receiving an external force. Further, the fixing plate 20 can be attached to the second assembly part 62 to hold the sealing device 1. The high pressure side is the front and the low pressure side is the front. The sealed fluid is sealed by the first seal portion 2A. The seal plate 2 can be made of a nickel-base alloy material in addition to the stainless steel plate. A specific example is 76% Ni-16% Cr-8% Fe alloy Inconel. In addition, ceramic plates, steel plates, Hastelloy X, Haynes alloy 25, etc. can also be used.

  In FIG. 3, it is a front view of the attachment state of the sealing device 1 which shows 3rd Embodiment of this invention. This sealing device 1 has substantially the same configuration as the sealing device 1 of FIG. The seal plate 2 is formed by bending a rectangular thin plate having a thickness of 0.06 mm or 0.1 mm into a V shape. The bending angle is about 80 °. In the first seal portion 2A, the arrangement surfaces of the seal plates 2 are close to each other, and can be elastically deformed with respect to the displacement of the first assembly component 61 and the second assembly component 62. In addition, the arrangement surface of each seal plate 2 is close to the second seal portion 2 </ b> B, and can be elastically deformed with respect to the displacement of the first assembly component 61 and the second assembly component 62. Further, the interval between the arrangement surfaces of the second seal portions 2 </ b> B is blocked by the fixing ring 20. The difference from FIG. 2 is that the sealing device 1 is formed in an annular shape. Therefore, the sealing device 1 is slidably held between the fixing ring 20 and the first assembly part 61. The fixing ring 20 can also be attached to the second assembly part 62.

FIG. 4 is a partially enlarged front view of the sealing device 1 showing the fourth embodiment of the present invention. This sealing device 1 is formed in an annular body. 4 is different from FIGS. 1 and 2 in that the lengths of the first seal part plate 2A1 and the second seal part plate 2B1 are changed. The thickness of the seal plate 2 is about 0.5 mm. The sealing plate 2 is formed by bending a rectangular thin plate into W. The elastic bending portion 3 of the sealing device 1 is formed to be bent in a W shape, and the arrangement surface of the elastic bending portions 3 of the first bent portion 3A and the second bent portion 3B is in close contact. And it welds along the elastic bending part 3, and forms the coupling | bond part 5. FIG. The first angle θ1 of the second bent portion 3B is formed at 45 °. The second angle θ2 is formed at 30 °. Regarding the relationship between the first angle θ1 and the second angle θ2, it is preferable that the second angle θ2 is smaller than the first angle θ1. The first bent portion 3A is also formed in the same angular relationship. Further, the arrangement surfaces of the first seal portion 2A on the first contact portion 2C side are in close contact with each other. The arrangement surface on the second contact portion 2D side of the second seal portion 2B is spaced apart by an increase in outer diameter, but the first contact from the second seal portion 2B side due to the close contact of the arrangement surfaces of the elastic bending portions 3 The fluid to be sealed is prevented from flowing into the portion 2C.

  FIG. 5 is a perspective view of a sealing device 1 showing a fifth embodiment of the present invention. The sealing device 1 of FIG. 5 is formed by bending the sealing plate 2 into a V shape and forming the elastic bent portion 3 into a V shape. The bending angle of V is about 110 °. The V-shaped seal plate 2 is fitted and arranged in the V-shape, and is welded along the elastic bending portion 3 to be formed at the coupling portion 5. The gaps between the arrangement surfaces of the first seal part plates 2A1 and the arrangement surfaces of the second seal part plates 2B1 are formed at a very small interval, so that even if the assembly component to which the seal device 1 is attached is displaced, The first seal portion 2A and the second seal portion 2B can be elastically deformed to cope with the displacement of the assembly component. Each sealing plate 2 is continuously connected by the connecting portion 5. The sealing device 1 of FIG. 5 is arranged in a straight line, but can be formed in the sealing device 1 having a shape arranged in an annular shape or an arc shape. This seal plate 2 is a stainless steel thin plate. The seal plate 2 having a thickness of 0.1 mm to 5 mm can be used in the thickness range of the thin plate. Other reference numerals in the sealing device 1 in FIG. 5 are the same as those in FIG. 1 or 2.

  FIG. 6 is a perspective view of a sealing device 1 showing a sixth embodiment of the present invention. The sealing device 1 shown in FIG. 6 is formed by bending a sealing plate 2 into a V shape and forming an elastic bent portion 3 into a W shape. The bending angle of this V shape is about 120 °. The V-shaped seal plate 2 is fitted and arranged in the V-shape, and is welded along the elastic bending portion 3 to be formed at the coupling portion 5. Each sealing plate 2 is continuously connected by the connecting portion 5. The sealing device 1 of FIG. 6 is arranged in a straight line, but can be formed in the sealing device 1 that is easily arranged in an annular shape or an arc shape. This seal plate 2 is a stainless steel thin plate. The seal plate 2 having a thickness of 0.1 mm to 1.0 mm can be used as the seal plate 2 in a thickness range. 6 are the same as those in FIG. 1 or FIG.

  FIG. 7 shows an embodiment in which the sealing device 1 shown in FIGS. 5 and 6 is attached between the attachment parts of the steam turbine or the gas turbine. The first attachment component 71 is provided with an attachment step 71A. Further, the second attachment component 72 is provided with a joining surface 72A that faces the attachment step 71A. The seal device 1 is mounted in the mounting space 70. The sealing device 1 is held by the fixing plate 20 so as not to be easily detached from the mounting space 70. Then, the sealing device 1 blocks between the high pressure side P1 and the low pressure side P2.

8 to 10 are front views of a part of a sealing device 1 similar to the sealing device 1 of FIG. The sealing device 1 in FIG. 8 shows a shape in a free state before being attached to the pair of assembly parts 61 and 62. Between each arrangement surface S, S, S of each 1st seal part board 2A1 and each 2nd seal part board 2B1, interval T which each 1st seal part board 2A1 and each 2nd seal part board 2B1 can elastically deform, It is good to form in T. The interval T between the array surfaces S can be formed by making θ2 smaller than θ1 in the relationship between the first angle θ1 and the second angle θ2. When the elastic bent portion 3 is formed and the overlapping surfaces of the elastic bent portion 3 are arranged in close contact with each other in layers, the first seal portion plate 2A1 and the second seal portion plate 2B1 can be elastically deformed. become. The sealing device 1 according to the present invention can improve the sealing ability between the first assembly part 61 and the second assembly part 62 and can be displaced between the first assembly part 61 and the second assembly part 62. Make it available. In particular, the sealed fluid is a high temperature, and is a pair of assembly parts 61 and 62 that receive external force such as vibration, and the mounting surfaces of the assembly parts 61 and 62 are also damaged by heat. With respect to such severe conditions, the sealing device 1 of the present invention effectively exhibits a sealing ability while corresponding to the displacement between the pair of assembly parts 61 and 62.

  FIG. 9 shows a case where the space between the first assembly component 61 and the second assembly component 62 is moved (displaced) in the C direction. In this case, the overlapping surface of the elastic bending portion 3 is in close contact with each other, and the distance T is small, so that the elastic deformation ability of the first seal portion 2A and the second seal portion 2B is exhibited.

  FIG. 10 shows a case where the elastic deformation of the first seal portion 2A and the second seal portion 2B is maximized. And each space | interval T of 1st seal part board 2A1 and each space | interval T of 2nd seal part board 2B1 closely_contact | adhere, and a sealing capability improves. This state is optimal in that the sealing ability is exhibited because the working gas is a severe condition at a high temperature.

  FIG. 11 is a front view of a part of the sealing device 1 showing a seventh embodiment of the present invention. Each seal plate 2 is a thin plate made of a stainless steel plate, and the thickness dimension range is preferably 0.05 mm to 10 mm. In this embodiment, the thickness of the seal plate 2 is about 0.5 mm. The seal plate 2 is formed in a rectangular thin plate. And the arrangement | sequence surface of this sealing board 2 is piled up, and it arranges in a ring shape. Each first seal portion 2A having an annular shape is provided with a through hole in the center, and a through-rod 5A is inserted into the through hole to connect each seal plate 2 and the push seal plate 2P in an annular shape. And the 1st contact part 2C is formed in the inner periphery of 2 A of 1st seal | sticker parts which comprise an annular | circular shape. The arrangement surface on the first contact portion 2C side is brought into close contact so that the sealed fluid does not leak.

  The first seal portion 2A is provided with a push seal plate 2P at regular intervals. The pressing seal plate 2P is provided with an elastic pressing portion 4 on the side opposite to the first contact portion 2C. The elastic pressing portion 4 is bent into an L shape and imparts elasticity. This sealing device 1 has a mounting space between the stepped joint surface 81A of the first assembly part 81 and the joint surface 82A of the second assembly part 82 on which a high-temperature, high-pressure sealed fluid such as a steam turbine or a gas turbine acts. It arrange | positions to 80 in a pressure-contact state. Since the elastic pressing portion 4 is brought into pressure contact with the joining surface 81A of the first assembly component 81, the first contact portion 2C is in close contact with the joining surface 82A.

FIG. 12 is a perspective view of a part of the sealing device 1 showing an eighth embodiment of the present invention.
The seal plate 2 is formed by forming a thin stainless steel plate into a rectangular shape and providing a through hole at the center. Further, the first contact portion 2 </ b> C is formed at one end of the seal plate 2. The sealing plate 2 is formed by inserting and arranging a pressing seal plate 2P every time a predetermined number of thin rectangular sealing plates 2 are arranged, and through the through hole provided in the sealing plate 2 and the pressing seal plate 2P, and through the rod 5A. To be connected. The pressing seal plate 2P is provided with an elastic pressing portion 4 at one end. The elastic pressing portion 4 is formed by bending into an L shape as shown in the figure. The elastic pressing portion 4 is formed to be narrower than the width of the seal plate 2, but may be the same width as the seal plate 2.

The sealing device 1 formed in this way is mounted as shown in FIGS. FIG. 13 is a front view of a part of the sealing device 1. FIG. 14 is a side view of the sealing device 1. 13 and 14, a pair of assembly parts 91 and 92 are a stator and a shroud on which high temperature and high pressure of the gas turbine act. The first assembly component 91 is provided with a stepped joint surface 91A. The second assembly part is provided with a joining surface 92A. In the sealing device 1, the elastic pressing portion 4 is in pressure contact with the stepped joint surface 91A to bring the other first contact portion 2C into close contact with the joint surface 92A. At the same time, the arrangement surfaces of the seal plates 2 are brought into close contact with each other to form the first seal portion 2 </ b> A by the seal plates 2. In this way, the high pressure side P1 and the low pressure side P2 are blocked by the sealing device 1.

  The sealing device 1 of the present invention has a sealing ability even when the mounting spaces 50, 60, 70, 80, 90 are displaced by being mounted in the mounting spaces 50, 60, 70, 80, 90 on which high-temperature, high-pressure fluid acts. Improves and demonstrates durability. Furthermore, since the sealing device 1 can be a simple structure in which the sealing plates 2 are arranged, the sealing device 1 can be easily attached and attached even in the case of complicated mounting spaces 50, 60, 70, 80, 90. Work costs can be reduced. Further, even if the formation surface of the mounting spaces 50, 60, 70, 80, 90 is deformed or has a complicated structure, the sealing device is provided by the arranged seal plate 2 and the elastic bending portion 3 or the elastic pressing portion 4. It is possible to seal the contact portion 2C of the first contact with certainty.

  As described above, the sealing device of the present invention is useful for use in the mounting space for assembly parts that seal high-temperature and high-pressure fluid. In particular, it is useful to be attached to a mounting space where a high-temperature / high-pressure fluid such as a turbine engine or nuclear equipment acts and undergoes stress deformation. Moreover, it is useful as a sealing device that can be easily mounted in any mounting space. Furthermore, it is useful as a sealing device that can reduce processing costs.

It is sectional drawing of the sealing device in the attachment space which shows 1st Embodiment of this invention.

It is a partial front view of the sealing device in the installation space which shows 2nd Embodiment of this invention.

It is a partial front view of the sealing device in the installation space which shows 3rd Embodiment of this invention.

It is a partial front view of the sealing device which shows 4th Embodiment of this invention.

It is a one part perspective view of the sealing device concerning a 5th embodiment of the present invention.

It is a one part perspective view of the sealing device concerning a 6th embodiment of the present invention.

It is sectional drawing of the sealing apparatus which attached the sealing apparatus 1 of FIG. 6 to the attachment space.

FIG. 8 is a front view of a part of the sealing device of FIGS. 1 to 7 according to the present invention.

FIG. 9 is a front view of a part of the state where the assembly parts are displaced from the state of FIG. 8 and the seal portion of the seal device is elastically deformed.

FIG. 9 is a partial front view of the state where the assembly parts are further displaced from the state of FIG. 8 and the seal portion of the seal device is elastically deformed.

It is a partial front view of the sealing device in the attachment space which shows 7th Embodiment of this invention.

It is a one part perspective view of the sealing device concerning an 8th embodiment of the present invention.

It is the front view which attached the sealing device of FIG. 9 in the attachment space.

It is the side view which attached the sealing device of FIG. 9 in the attachment space.

It is sectional drawing of the related art seal ring concerning this invention.

1 Sealing device
2 Seal plate
2A 1st seal part
2B Second seal part
2C 1st contact part
2D second contact part
2E 1st side
2F 2nd side
2P push seal plate
3 Elastic bend
3A 1st bending part (bending part)
3B 2nd bending part (bending part)
4 Elastic pressing part
5 joints
5A threading rod
20 Fixing ring (fixing plate)
P1 High pressure side
P2 Low pressure side

Claims (5)

A sealing device for sealing between assembled parts, wherein one first seal part obtained by bending a thin plate in close contact with one part of the assembly part and the other second seal part in close contact with the other part of the assembly part And a sealing plate having an elastic bent portion formed between the first seal portion and the second seal portion,
And a connecting portion for connecting the elastic bending portions that are overlapped with each other and inserted in the folded inner side of each seal plate in parallel,
The sealing device characterized in that the surfaces of the respective elastic bent portions that are overlaid are in close contact with each other . 2. The elastic bent portion of the seal plate is bent into an uneven shape to form a W shape , and the surfaces of the stacked elastic bent portions are in close contact with each other along an array. The sealing device according to 1.   3. The sealing device according to claim 1, wherein the coupling portion is formed by welding end surfaces in the width direction of the elastic bending portion. A sealing device for sealing between assembly parts, a seal plate having a first seal portion formed in a rectangular thin plate and in close contact with one part of the assembly parts, and arranged in the middle of the seal plates stacked in parallel A pressing seal plate having a first seal portion in close contact with the one component of the assembly component and having an elastic pressing portion in pressure contact with the other component of the assembly component, and the stacked seal plate and the A connecting portion that connects the pressing seal plate in parallel, and the parallel surface on the first contact portion side of the first seal portion is close to or close to the surface of the one component. Sealing device.   The coupling portion has a through hole penetrating the seal plate and the push seal plate in a parallel direction, and has a through-rod that penetrates the through hole and connects the seal plate and the push seal plate. The sealing device according to claim 4.

Images