CN113669451A - Sealing structure and application thereof in high-temperature and high-pressure system - Google Patents
Sealing structure and application thereof in high-temperature and high-pressure system Download PDFInfo
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- CN113669451A CN113669451A CN202111011345.3A CN202111011345A CN113669451A CN 113669451 A CN113669451 A CN 113669451A CN 202111011345 A CN202111011345 A CN 202111011345A CN 113669451 A CN113669451 A CN 113669451A
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- limiting
- end cover
- ring
- groove
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 94
- 230000000670 limiting effect Effects 0.000 claims abstract description 128
- 238000009413 insulation Methods 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 11
- 239000007787 solid Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- -1 perfluoro Chemical group 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 241001347978 Major minor Species 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of gas generators and discloses a sealing structure which comprises an end cover coaxially arranged with a shell, wherein the end cover is sleeved in the shell, and the end cover is partially attached to the shell; the sealing structure comprises a sealing ring and a limiting ring, wherein the sealing ring is arranged at the contact end face of the end cover and the shell and is used for forming sealing between the shell and the end cover, and the limiting ring is used for forming a plurality of axial limiting points between the shell and the end cover. According to the sealing structure, the sealing ring and the limiting ring are arranged on the contact surface of the end cover and the shell, the end cover and the shell are axially limited while sealing is formed between the end cover and the shell, stable sealing and limiting are provided while the load between the shell and the end cover is not increased, and the sealing reliability between the end cover and the shell is ensured.
Description
Technical Field
The invention relates to the technical field of fuel gas generators, in particular to a sealing structure and application thereof in a high-temperature and high-pressure system.
Background
At present, the tail of a solid rocket engine, a gas generator and the like needs to be sealed after gunpowder is filled in a cavity body, and the solid rocket engine, the gas generator and the like can generate great high temperature and high pressure during working, so that the tail is required to have good sealing performance.
The existing solid rocket engine and gas generator are usually sealed by adopting a flange structure or a threaded connection structure, but when the flange structure or the threaded connection structure is adopted, the flange structure or the threaded connection structure at the bottom needs to be thickened or subjected to heat insulation treatment in order to ensure the sealing performance, so that the whole sealing structure is large in size and high in weight, the weight of the solid rocket engine, the gas generator and the like is seriously increased, the working load of the solid rocket engine, the gas generator and the like is increased, and the solid rocket engine and the gas generator are not favorable for launching the solid rocket and the like. Therefore, the sealing performance of the powder sealing structure of the solid rocket engine and the gas generator in the existing design is always difficult to guarantee.
Disclosure of Invention
In view of one or more of the above-mentioned drawbacks or needs for improvement in the prior art, the present invention provides a sealing structure for solving the problem that the sealing structure of the conventional high-temperature and high-pressure system is easily separated from the chamber body.
In order to achieve the above object, the present invention provides a sealing structure, including an end cap,
the end cover can be embedded in the opening of the shell and seals the opening, and a limiting assembly and a sealing assembly are arranged between the end cover and the inner wall of the shell;
the limiting assembly is used for forming axial limiting between the shell and the end cover;
the seal assembly is for forming a seal between the housing and the end cap.
As a further improvement of the present invention, the limiting component includes a first annular groove circumferentially opened on a side circumference of the end cover and a second annular groove circumferentially opened on an inner circumference of the housing, the first annular groove and the second annular groove form a circumferential limiting groove when the end cover is embedded in the opening of the housing, a limiting ring is disposed in the limiting groove, and one side of the limiting ring is disposed in the first annular groove, and the other side thereof is disposed in the second annular groove, so as to axially limit the housing and the end cover.
As a further improvement of the present invention, the sealing assembly includes a third ring groove circumferentially opened on a side circumference of the end cover and/or a fourth ring groove circumferentially opened on an inner circumference of the housing, the third ring groove and/or the fourth ring groove form a circumferential sealing groove when the end cover is embedded at the opening of the housing, and a sealing ring for sealing an embedded position of the housing and the end cover is disposed in the sealing groove.
As a further improvement of the invention, the limiting ring comprises a plurality of limiting sections which are sequentially arranged, the number of the limiting sections is 20-30, and the limiting ring is formed by the plurality of limiting sections in a surrounding manner.
As a further improvement of the invention, a plurality of limiting segments are arranged in the limiting groove in a uniform mode.
As a further improvement of the invention, at least one placing groove is formed on the housing opposite to the limiting groove, and the placing groove is used for sequentially placing the limiting sections so as to form a limiting ring in the limiting groove.
As a further improvement of the invention, the placing groove is correspondingly matched with a fixing section, and the fixing section and the plurality of limiting sections form a limiting ring together.
As a further improvement of the invention, the fixing section is also provided with a fixing piece, the fixing piece penetrates through the fixing section along the radial direction of the end cover, and the fixing piece is detachably connected with the side wall of the end cover.
As a further improvement of the invention, the end surface of the end cover embedded in the shell is also provided with a heat insulation layer.
The invention also comprises a high-temperature and high-pressure system which comprises a cylindrical shell for sealing fuel, wherein the sealing structure is arranged at the opening of the shell.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) according to the sealing structure, the sealing ring and the limiting ring are arranged on the contact surface of the end cover and the shell, the end cover and the shell are axially limited while sealing is formed between the end cover and the shell, stable sealing and limiting are provided while the load between the shell and the end cover is not increased, and the sealing reliability between the end cover and the shell is ensured.
(2) According to the sealing structure, the limiting rings are arranged in a multi-section mode, the placing grooves for placing the multi-section limiting sections are formed in the shell, so that the whole limiting ring can be placed in the limiting groove only through the smaller placing groove between the shell and the end cover, and the whole sealing performance of the shell is not affected.
(3) According to the sealing structure, the limiting ring is arranged in a multi-section mode, the fixing section is used for compensation sealing, so that the limiting ring forms a complete sealing ring structure at the limiting groove, the limiting capacity of the limiting ring between the shell and the end cover is guaranteed, meanwhile, the limiting ring is arranged in a multi-section mode, when the end cover is subjected to axial thrust, the limiting sections on the limiting ring can respectively bear the thrust transmitted by the end cover and are evenly distributed on the shell, and good limiting effect of the limiting ring is guaranteed.
(4) According to the sealing structure, the placing groove for placing the multiple sections of limiting sections is formed in the shell, the fixing piece with the fixing section matched with the end cover is additionally arranged, the multiple sections of sealing elements are clamped through the fixing section to form a ring, the placing groove is sealed, the fixing section is fixed through the fixing piece, the end cover, the shell and the limiting ring are tightly fixed, and stable sealing of the whole sealing structure is guaranteed.
Drawings
Fig. 1 is a schematic view of the overall structure of a seal structure in an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view taken at A-A in FIG. 1;
FIG. 3 is a schematic view of the structure at the end cap in an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a stop collar according to an embodiment of the invention.
In all the figures, the same reference numerals denote the same features, in particular:
1. an end cap; 2. a housing; 3. a seal ring; 4. a limiting ring; 5. a thermal insulation layer;
101. a sealing groove; 102. a limiting groove; 103. a placement groove; 104. connecting grooves;
401. a limiting section; 402. a fixed section; 403. and a fixing member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
as shown in fig. 1 to 4, the sealing structure in the preferred embodiment of the present invention includes an end cap 1 coaxially disposed with a housing 2, the end cap 1 is sleeved in the housing 2, and a portion between the end cap 1 and the housing 2 is attached; the sealing structure is arranged at the contact end face of the end cover 1 and the shell 2 and comprises a sealing ring 3 and a limiting ring 4, wherein the sealing ring 3 is used for forming sealing between the shell 2 and the end cover 1, and the limiting ring 4 is used for forming a plurality of axial limiting points between the shell 2 and the end cover 1 so as to avoid relative displacement of the end cover 1 and the shell 2 in the axial direction.
When sealing a traditional solid rocket engine or a traditional gas generator, an end cover 1 is arranged at an opening of a shell 2 of a device to be sealed, a sealing ring is additionally arranged between the end cover 1 and the shell 2, and then the end cover 1 and the shell 2 are secondarily sealed or reinforced at the contact bottom end. If not reinforced, the rocket engine or the gas generator can expand instantly in the inner fuel in the aerodynamic moment and generate huge thrust along the axial direction of the engine, and the sealing ring between the end cover 1 and the shell 2 cannot provide good limiting capacity in the axial direction, so that the end cover 1 is easily separated from the shell 2. If the end cover 1 is reinforced at the tail part of the shell 2, the disassembly efficiency of the tail part of the shell 2 is seriously influenced, the integral mass of the rocket engine or the fuel gas generator is increased, and the launching speed of the rocket engine is influenced.
This application is through adopting multistage sealed form, carry out the form through first sealing washer between to end cover 1 and casing 2 and seal, guarantee the seal stability between end cover 1 and the casing 2, ensure the combustion efficiency of inside fuel to it is spacing to utilize the second sealing washer to form the axial on end cover 1 and casing 2 contact surface, through the axial motion of second sealing washer restriction end cover 1 and casing 2, ensure rocket engine or gas generator's steady operation.
Further, as shown in fig. 1, as a preferred embodiment of the present invention, a sealing groove 101 is opened on a contact surface between the end cap 1 and the housing 2, and the sealing ring 3 is embedded in the sealing groove 101. The seal groove 101 is formed by a third ring groove provided on the side periphery of the end cap 1 and/or a fourth ring groove circumferentially provided on the inner periphery of the housing 2.
When utilizing sealing ring 3 to seal end cover 1 and casing 2, the setting of partly laminating between end cover 1 and the casing 2, sealing ring 3 main function lie in closely laminating between casing 2 inner wall and end cover 1 lateral wall through sealing ring 3, strengthens the sealing performance between casing 2 and the end cover 1. Under the general condition, the shell 2 is a cylindrical shell 2, the end cover 1 is in a disc-shaped form, the sealing ring 3 is attached to the outer ring of the side wall of the end cover 1 and is in a sealing ring form, the whole body is made of perfluoro rubber, the perfluoro rubber has better heat resistance and can be stably used at 300 ℃, the whole compression ratio is 17.1% -22.4%, and the inner wall of the shell 2 and the side wall of the end cover 1 can be attached to each other all the time under the heating condition or the non-use condition. The sealing groove 101 is an annular groove formed in the side wall of the end cover 1 or an annular groove, i.e., a third annular groove or a fourth annular groove, formed in the inner wall of the casing 2, or a notch is formed in the side wall of the end cover 1 and the inner wall of the casing 2 at the same time, i.e., the third annular groove and the fourth annular groove are combined to form, and the side wall of the end cover 1 and the notch in the inner wall of the casing 2 are combined to form an accommodating area of the sealing ring 3.
Preferably, in order to ensure the limiting effect of the limiting ring 4 on the end cover 1 and the shell 2, the limiting ring 4 is of a rigid structure, and the limiting ring 4 can limit and fix the end cover 1 and the shell 2 only by arranging the limiting ring 4 between the two. And the sealing ring 3 itself adopts rubber material to guarantee the inseparable laminating to end cover 1 and casing 2, consequently can consider to set up a plurality of sealing rings 3 side by side in seal groove 101, perhaps set up a plurality of seal grooves 101 between end cover 1 and casing 2, and correspond the form that sets up a plurality of sealing rings 3, with this sealing performance between assurance end cover 1 and the casing 2.
Further, as a preferred embodiment of the present invention, a limiting groove 102 is formed on a contact surface between the end cover 1 and the housing 2, the limiting groove 102 is formed by combining a first ring groove formed on a side circumference of the end cover 1 and a second ring groove formed on an inner circumference of the housing 2 along a ring direction, and a limiting ring 4 is disposed in the limiting groove 102, one side of the limiting ring 4 is located in the first ring groove, and the other side of the limiting ring 4 is located in the second ring groove. The spacing ring 4 is as the limit structure of end cover 1 and casing 2 for when the spacing ring 4 was in embedding spacing groove 102, when the spacing ring 4 butt spacing groove 102 lateral wall, can restrict end cover 1 and casing 2 simultaneously, consequently required the spacing ring 4 be partial embedding end cover 1 with casing 2 on, consequently place the notch of spacing ring 4 and locate casing 2 partly, the part is located on end cover 1. When axial thrust is generated between the end cover 1 and the shell 2, the axial thrust between the end cover 1 and the shell 2 acts on the limiting ring 4, and the limiting ring 4 locks the end cover 1 and the shell 2 in the axial direction.
Further, as shown in fig. 4, as a preferred embodiment of the present invention, the stop collar 4 includes a stop segment 401 disposed in multiple segments, and the number of the segments of the stop segment 401 is between 20 and 30. When utilizing spacing ring 4 to form the axial between end cover 1 and the casing 2 spacing, high temperature high-pressure gas can produce great axial thrust to end cover 1, consequently apply the thrust on spacing ring 4 also great, this just leads to spacing ring 4 can't adopt soft materials, need adopt hard material just can provide better spacing ability. The limiting ring 4 is made of low-carbon alloy structural steel, the integral quenching hardness is 35-40 HRC, and the limiting ring has high tensile strength and high shear resistance. And because spacing ring 4 is hard material, when utilizing spacing ring 4 to carry out spacingly to end cover 1 and casing 2, spacing ring 4 can't guarantee to laminate completely on end cover 1 and casing 2, when receiving the axial impact force, the skew probably appears in the contact between spacing ring 4 and end cover 1 and the casing 2, causes the partial atress of second sealing washer. Therefore, the limiting ring 4 is integrally divided into 20-30 limiting sections 401, small displacement can be generated between the limiting sections 401 in the axial direction of the shell 2, and then the pressure applied to the limiting ring 4 by the end cover 1 is adjusted, so that the thrust can be uniformly dispersed to the limiting sections 401, and the good limiting capacity of the limiting sections 401 is guaranteed.
Further, as a preferred embodiment of the present invention, the position-limiting segments 401 are uniformly or non-uniformly received in the position-limiting groove 102, and a fixing segment 402 for compressing the plurality of position-limiting segments 401 into a ring structure is disposed in the position-limiting groove 102. In the process of forming the stop collar 4 using the stop segments 401, each stop segment 401 may be arranged in a completely uniform manner, i.e., each stop segment 401 is completely the same, and a complete annular stop collar 4 is formed. Similarly, each limiting segment 401 may be disposed in a non-uniform manner, or partially uniform, and partially non-uniform manner to form a ring structure according to actual requirements.
Preferably, due to the problems of cutting precision and the like, the uniformity of each limiting section 401 can be ensured only to the maximum extent by each limiting section 401. The limiting section 401 in the present application is preferably divided into 24 equal parts, and the circumferential included angle of each equal part is between 14.8 degrees and 15 degrees. In addition, in order to ensure that the limiting section 401 forms a complete annular sealing structure, 23 equal parts of the limiting section 401 are uniformly separated, and a section of the limiting section 401 is reserved to compensate the formed limiting ring 4 so as to form the complete limiting ring 4. In general, 23 limiting segments 401 are arranged in a uniform manner, that is, the circumferential included angle is between 14.8 ° and 15 °, and the circumferential included angle of another limiting segment 401 is 16 °, where the circumferential included angle of the limiting segment 401 is about 1 ° greater than that of the other limiting segments 401, mainly for compensating the segmentation error of the snap ring segment to ensure the complete limiting of the limiting ring 4.
Further, as shown in fig. 2 and fig. 3, as a preferred embodiment of the present invention, a placement groove 103 is formed in the housing 2, the multiple segments of the limiting segments 401 are placed into the limiting groove 102 in a segmented manner, and after the limiting segments 401 are placed into the limiting groove 102, the fixing segments 402 are matched with the placement groove 103, and a fixing member 403 is disposed between the fixing segments 402 and the end cover 1. In order to ensure the sealing performance of the contact part between the end cover 1 and the housing 2, the end cover 1 and the housing 2 are not provided with an opening for placing the limit ring 4 into the limit groove 102. Therefore, the shell 2 is provided with a placing groove 103 for placing each limiting section 401, each limiting section 401 is filled into the limiting groove 102 in a filling mode, a complete sealing ring structure is formed finally, meanwhile, in order to guarantee the stability of the limiting ring 4, the last limiting section 401 is set to be a fixed section 402, and the fixed section 402 can abut against the limiting groove 102 after being matched with each limiting section 401 to form a complete annular structure. Meanwhile, the fixing section 402 is further provided with a fixing part 403 for fixing the fixing section 402 and the end cover 1, the fixing part 403 is preferably in a fixing screw form, and the fixing screw penetrates through the fixing part 403 and is in threaded matching with the side wall of the end cover 1, so that a fixing structure is formed among the fixing part 403, the limit ring 4, the end cover 1 and the shell 2, and stable limit of the limit ring 4 is guaranteed.
Preferably, since the limiting groove 102 itself is an annular groove and the limiting section 401 itself is a rigid structure, the manner of forming only one placing groove 103 on the housing 2 may cause a problem that the limiting section 401 far from the placing groove 103 is difficult to be taken out. For this reason, can set up the form of a plurality of standing grooves 103 on casing 2 to increase the convenience that spacing section 401 took out, avoid the loss that a plurality of standing grooves 103 brought to casing 2 intensity simultaneously, the standing groove 103 that the casing 2 periphery set up is preferred 1 ~ 3, when the spacing section 401 in the spacing groove 102 is whole to be taken out, through putting the spacing section 401 in the butt of standing groove 103 department, promote spacing section 401 to another standing groove 103 department one by one, take out spacing section 401 one by one again.
Further, as a preferred embodiment of the present invention, a thermal insulation layer 5 is further provided on the side of the end cover 1 facing the high temperature and high pressure system, and the thermal insulation layer 5 covers the end face of the end cover 1 and the connecting seam of the end cover 1 and the shell 2. Although a sealing structure can be formed between the shell 2 and the end cover 1, the sealing ring 3 is thin and is arranged in the middle of the joint surface of the end cover 1 and the shell 2, and a gap is still generated at the end surface of the end cover 1 and the shell 2, so that when fuel in the shell 2 is combusted, part of heat flow still enters the gap between the end cover 1 and the shell 2, and the sealing ring 3 is continuously eroded in the long-time use process, so that the heat flow passes through the sealing ring 3; the limiting ring 4 is a hard structure, and a gap is reserved between the limiting ring and the end cover 1 and between the limiting ring and the shell 2, so that heat flow cannot be completely blocked, and leakage is caused. Therefore, the end cover 1 facing the inside of the shell 2 is provided with the heat insulation layer 5, and the heat insulation layer 5 completely covers the inner wall of the end cover 1 and is attached to the inner wall of the shell 2, so that heat flow is prevented from entering a gap between the end cover 1 and the shell 2.
Preferably, the heat insulating layer 5 here adopts flexible resistant ablation material to adopt the pressure vulcanization shaping pressure to establish on the terminal surface of end cover 1, simultaneously, in order to guarantee that heat insulating layer 5 is attached with the terminal surface of end cover 1, the good of casing 2 inner wall, set up one side of end cover 1 towards the casing 2 in into the profile in the ellipsoid, its major-minor axis is than 4, makes things convenient for heat insulating layer 5 to attach on the inner wall of end cover 1, and possesses better compressive capacity.
Further, as a preferred embodiment of the present invention, a connection groove 104 connected with an external part is further provided on a side of the end cover 1 facing away from the high temperature and high pressure system. Because spacing ring 4 in this application adopts the multistage formula structure, and set up the standing groove 103 that supplies each spacing section 401 to put into and take out on casing 2, make spacing ring 4 take out the back from spacing groove 102, there is not too big spacing power in the axial between end cover 1 and casing 2, consequently, one side that deviates from casing 2 inside at end cover 1 sets up in external connection's spread groove 104, draw the structural connection with the outside through spread groove 104, in order to separate end cover 1 and casing 2, here spread groove 104 preferably adopts threaded connection groove 104, the convenient accordant connection who draws the structure with the outside.
The working process of the invention is as follows: when the shell 2 needs to be sealed by using a sealing structure of a high-temperature and high-pressure system, a heat insulation layer 5 is attached to the inside of an end cover 1, a first limiting section 401 is arranged at a sealing groove 101, the end cover 1 is sent into the shell 2, then the heat insulation layer 5 is molded on the end cover 1 through pressure vulcanization, meanwhile, sealing is formed between the end cover 1 and the shell 2 by using the first limiting section 401, a plurality of limiting sections 401 are plugged into a limiting groove 102 through a placing groove 103, then a fixing section 402 is arranged at the placing groove 103, so that the limiting sections 401 and the fixing section 402 are surrounded to form a complete sealed annular structure and are filled with the limiting groove 102, the fixing section 402 and the end cover 1 are fixed by using a fixing piece, and the whole sealing structure is sealed; when the sealing structure and the shell 2 need to be detached, the fixing piece 403 is taken down, the fixing section 402 and the limiting sections 401 are taken out from the placing groove 103, the connecting groove 104 is connected with an external stretching device, the end cover 1 structure is pulled out reversely, the sealing ring 3 is separated from the inner wall of the shell 2, the heat insulation layer 5 is separated from the shell 2 along with the end cover 1, and the sealing structure is separated from the shell 2.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A sealing structure for sealing an opening of a cylindrical shell is characterized by comprising an end cover,
the end cover can be embedded in the opening of the shell and seals the opening, and a limiting assembly and a sealing assembly are arranged between the end cover and the inner wall of the shell;
the limiting assembly is used for forming axial limiting between the shell and the end cover;
the seal assembly is for forming a seal between the housing and the end cap.
2. The seal structure of claim 1, wherein the limiting component includes a first ring groove opened on the side circumference of the end cap in the circumferential direction and a second ring groove opened on the inner circumference of the housing in the circumferential direction, the first ring groove and the second ring groove form a circumferential limiting groove when the end cap is fitted at the opening of the housing, a limiting ring is disposed in the limiting groove, and one side of the limiting ring is disposed in the first ring groove and the other side thereof is disposed in the second ring groove to axially limit the housing and the end cap.
3. The seal structure of claim 1, wherein the seal assembly includes a third ring groove circumferentially opened on a side circumference of the end cap and/or a fourth ring groove circumferentially opened on an inner circumference of the housing, the third ring groove and/or the fourth ring groove forming a circumferential seal groove when the end cap is fitted at the opening of the housing, and a seal ring for sealing a fitting position of the housing and the end cap is provided in the seal groove.
4. The sealing structure of claim 2, wherein the limiting ring comprises a plurality of limiting sections which are sequentially arranged, the number of the limiting sections is 20-30, and the limiting ring is formed by the plurality of limiting sections in a surrounding manner.
5. The seal structure of claim 4, wherein a plurality of the retainer segments are disposed in the retainer groove in a uniform manner.
6. The seal structure of claim 4, wherein the housing defines at least one slot opposite to the position of the position-limiting slot, and the slot is used for sequentially placing a plurality of position-limiting segments to form a position-limiting ring in the position-limiting slot.
7. The sealing structure according to claim 6, wherein the placement groove is further correspondingly matched with a fixing section, and the fixing section and the plurality of limiting sections together form a limiting ring.
8. The sealing structure of claim 7, wherein a fixing member is further disposed on the fixing section, the fixing member penetrates through the fixing section along a radial direction of the end cover, and the fixing member is detachably connected to the side wall of the end cover.
9. The seal structure of claim 1, wherein the end surface of the end cap embedded in the housing is further provided with a thermal insulation layer.
10. A high-temperature and high-pressure system comprising a cylindrical housing for sealing fuel, wherein the opening of the housing is provided with a sealing structure as claimed in claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111011345.3A CN113669451A (en) | 2021-08-31 | 2021-08-31 | Sealing structure and application thereof in high-temperature and high-pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111011345.3A CN113669451A (en) | 2021-08-31 | 2021-08-31 | Sealing structure and application thereof in high-temperature and high-pressure system |
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| CN113669451A true CN113669451A (en) | 2021-11-19 |
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| CN202111011345.3A Pending CN113669451A (en) | 2021-08-31 | 2021-08-31 | Sealing structure and application thereof in high-temperature and high-pressure system |
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030010038A1 (en) * | 2001-06-27 | 2003-01-16 | Hans Maghon | Heat shield arrangement for a component carrying hot gas, in particular for structural parts of gas turbines |
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