CN218914091U - Self-tightening W-shaped metal sealing ring - Google Patents
Self-tightening W-shaped metal sealing ring Download PDFInfo
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- CN218914091U CN218914091U CN202222481367.2U CN202222481367U CN218914091U CN 218914091 U CN218914091 U CN 218914091U CN 202222481367 U CN202222481367 U CN 202222481367U CN 218914091 U CN218914091 U CN 218914091U
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Abstract
The utility model discloses a self-tightening W-shaped metal sealing ring, which comprises a circular metal sealing ring body, wherein the metal sealing ring body is a hollow circular metal ring, and W-shaped openings which are radially inwards, radially outwards or axially opened are respectively arranged on the circumference of an inner ring or an outer ring or an end face of the circular metal sealing ring body, so that the metal sealing ring body forms a circular annular elastic whole with the W-shaped openings in the circumferential direction of the body; the metal sealing ring body is a sealing ring with self-tightening sealing characteristics, is particularly suitable for flange plate connectors with compact sealing structure size, limited strength and insufficient pretightening force, such as important sealing systems of an exhaust pipe sealing system for tail gas aftertreatment of an engine, a sealing system at the joint between an ultrahigh vacuum pressure container flange and the like, has the characteristics of convenience in use, long service life, good sealing effect and the like, and has extremely high practicability and popularization significance.
Description
Technical Field
The utility model belongs to the technical field of sealing elements, and particularly relates to a self-tightening W-shaped metal sealing ring.
Background
As is well known, engine exhaust sealing system gaskets are important sealing parts for connecting an engine and each exhaust flange, and the material temperature resistance, the sealing structure and the like of the gasket affect the production cost and the product sealing reliability. With the upgrading of engine emission, the explosion pressure is continuously increased, the overall temperature resistance and the quality requirements of the sealing gasket are continuously improved, and the advantages and disadvantages of the exhaust system gasket can influence the engine performance and the engine emission.
The existing metal exhaust sealing gasket has the following defects: 1. the thermal deformation of the joint surface of the flange seal is required to be small, and the requirement leads to the improvement of the processing precision of the exhaust pipe and the improvement of the temperature resistance requirement of the exhaust pipe material, so that the cost of the engine is correspondingly increased; 2. the exhaust temperature of the engine is continuously increased, and after the existing metal material is pressed into a waveform, the compensation property, the material strength and the like at high temperature do not meet the requirements.
The vacuum sealing ring is mainly made of rubber, polytetrafluoroethylene, polyurethane and other synthetic materials. Rubber and synthetic materials have the advantages of high elasticity, high wear resistance, proper mechanical strength and the like, so that the rubber and synthetic materials are widely applied to vacuum sealing, but are limited in application due to the characteristics of high air outlet rate and permeability, incapability of baking at high temperature, inadiation resistance and the like. For ultra-high vacuum sealing, the leakage rate is generally required to be always smaller than 1 multiplied by 10 < -11 > Pa.m3/s, so that for better sealing fit, a sealing element with better effect is required to be provided to ensure the tightness of the joint between flanges of the ultra-high vacuum pressure vessel, and the metal sealing ring overcomes the defects of rubber sealing, so that the ultra-high vacuum sealing device is widely applied to ultra-high vacuum environments.
Disclosure of Invention
The utility model aims to provide a self-tightening W-shaped metal sealing ring, which solves the problems in the technical background.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model relates to a self-tightening W-shaped metal sealing ring, which comprises a circular metal sealing ring body, wherein the metal sealing ring body is a hollow circular metal ring, and W-shaped openings which are radially inwards, radially outwards or axially opened are respectively arranged on the circumference of an inner ring or an outer ring or an end face of the circular metal sealing ring body, so that the metal sealing ring body forms a circular annular elastic whole with the W-shaped openings in the circumferential direction of the body.
Further, the metal sealing ring body is a revolving body with a W-shaped cross section, the W-shaped cross section comprises a first arc sealing section, a first arc transitional connecting section, a first elastic trough section, an elastic crest section for adjusting the radial direction, a second elastic trough section, a second arc transitional connecting section and a second arc sealing section which are sequentially connected, and the first elastic trough section, the first arc transitional connecting section, the first arc sealing section, the second elastic trough section, the second arc transitional connecting section and the second arc sealing section are all in mirror symmetry structures.
Further, the cross section of the metal sealing ring body is W-shaped, the cross sections of a first elastic trough section, a second elastic trough section and an elastic crest section for adjusting the radial direction of the W-shaped cross section structure are U-shaped, the root of the U-shaped trough section is an arc with the radius of R1, the root of the U-shaped trough section for adjusting the radial direction is an arc with the radius of R2, two parallel line sections connected with the arc of the U-shaped root are wave heights h, and the first arc-shaped sealing section and the second arc-shaped sealing section are arcs with the radius of curvature of R3; the first arc-shaped transition connection section and the second arc-shaped transition connection section are arcs with a curvature radius R4.
Further, the curvatures of the sealing surface of the first arc-shaped sealing section and the sealing surface of the second arc-shaped sealing section of the axially-opened W-shaped opening arranged on the circumferential end surface of the metal sealing ring body are 0.
Further, the metal sealing ring body can be processed into sealing rings of three structural types of sealing inner pressure, sealing outer pressure or radial sealing round holes and cylindrical shafts according to different positions of the W-shaped opening.
Further, the metal sealing ring body is made of nickel-based superalloy steel strips.
Further, the sealing surface of the arc-shaped sealing section of the W-shaped opening which is arranged on the circumference of the metal sealing ring body and is radially inwards or radially outwards is coated or electroplated with a soft metal layer, and the material of the soft metal layer coated or electroplated on the surface is metallic silver or metallic nickel.
Further, the surface of the axially-opened W-shaped opening arranged on the circumferential end surface of the metal sealing ring body is subjected to chromium aluminum nitride coating treatment.
The utility model has the following beneficial effects:
the metal sealing ring body is a sealing ring with self-tightening sealing characteristics, is particularly suitable for flange plate connectors with compact sealing structure size, limited strength and insufficient pretightening force, such as important sealing systems of an exhaust pipe sealing system for tail gas aftertreatment of an engine, a sealing system at a joint between an ultrahigh vacuum pressure container flange and the like, has the characteristics of convenience in use, long service life, good sealing effect and the like, and has extremely high practicability and popularization significance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1: a cross-sectional configuration view of a first embodiment of the present utility model.
Fig. 2: a cross-sectional construction view of a second embodiment of the present utility model.
Fig. 3: a cross-sectional configuration view of a third embodiment of the present utility model.
Fig. 4: the cross-sectional configuration of the present utility model.
Fig. 5: the size of each part of the utility model is schematically shown.
Fig. 6: an assembly of a first embodiment of the present utility model with a fully enclosed lower flange member.
Fig. 7: a second embodiment of the utility model is shown assembled with a semi-enclosed lower flange member.
Fig. 8: an assembly drawing of a third embodiment of the present utility model with an exhaust fitting.
Fig. 9: the working state structure of the utility model is schematically shown.
In the drawings, the list of components represented by the various numbers is as follows:
1. a metal seal ring body; 2. a W-shaped opening; 3. a first arcuate sealing segment; 4. a first arcuate transition connection section; 5. a first elastic trough section; 6. adjusting the elastic peak section in the radial direction; 7. a second elastic trough section; 8. a second arcuate transition connection section; 9. a second arcuate sealing segment; 10. an upper flange; 11. a totally-enclosed lower flange; 12. a semi-closed lower flange; 13. a front exhaust pipe; 14. a rear exhaust pipe; r1, the radius of the arc of the root of the U-shaped trough section; r2, the radius of the root arc of the U-shaped wave crest section; r3, the arc curvature radius of the first arc-shaped sealing section and the second arc-shaped sealing section; r4, the arc curvature radius of the first arc-shaped transition connecting section and the arc curvature radius of the second arc-shaped transition connecting section; h. wave height; t, the annular wall thickness of the metal sealing ring body; H. w-shaped opening height of the metal sealing ring body.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiments of the present utility model, the terms "first," "second," and the like in the description and the claims of the present application and the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application herein; the terms "radial," "axial," "upper," "lower," "inner," "outer," "front," "rear," "left," "right," "middle," and the like refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
In addition, in the description of the present utility model, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements.
Referring to fig. 1-9, the present utility model is a self-tightening W-shaped metal seal ring, which comprises a circular metal seal ring body 1, wherein the metal seal ring body 1 is a hollow circular metal ring, and W-shaped openings 2 which are radially inward, radially outward or axially opened are respectively arranged on the circumference of the inner ring or the outer ring or the end face of the circular metal seal ring body 1, so that the metal seal ring body 1 forms a circular annular elastic whole with the W-shaped openings 2 in the circumferential direction of the body. Because the metal seal ring body 1 is a revolving body with a W-shaped cross section, the W-shaped cross section comprises a first arc-shaped sealing section 3, a first arc-shaped transitional connecting section 4, a first elastic trough section 5, an elastic crest section 6 for adjusting the radial direction, a second elastic trough section 7, a second arc-shaped transitional connecting section 8 and a second arc-shaped sealing section 9 which are sequentially connected, and the first elastic trough section 5, the first arc-shaped transitional connecting section 4, the first arc-shaped sealing section 3, the second elastic trough section 7, the second arc-shaped transitional connecting section 8 and the second arc-shaped sealing section 9 are all in mirror symmetry structures.
Firstly, because the metal sealing ring body 1 is provided with two elastic trough sections and an elastic crest section for adjusting the radial direction, the metal sealing ring body 1 has good compression retraction elasticity and radial vibration following performance, when the metal sealing ring body 1 is compressed in use, larger contact stress and elastic deformation are generated, so that the arc-shaped sealing surfaces of the first arc-shaped sealing section 3 and the second arc-shaped sealing section 9 on the metal sealing ring body 1 form effective close contact and lamination with the micro uneven parts on the surfaces of the upper flange 10 and the surfaces of the totally-closed lower flange 11 or the surfaces of the semi-closed lower flange 12, thereby achieving initial sealing between the arc-shaped sealing surfaces of the first arc-shaped sealing section 3 and the second arc-shaped sealing section 9 on the metal sealing ring body 1 and the surfaces of the upper flange 10 and the surfaces of the totally-closed lower flange 11 or the semi-closed lower flange 12; secondly, the metal sealing ring body 1 is provided with a unique elastic corrugated structure of a first elastic trough section 5, a second elastic trough section 7, two elastic trough sections and an elastic crest section 6 for adjusting the radial direction, so that the metal sealing ring body 1 has good axial or radial compression retraction elasticity and radial vibration following performance, the elastic compensation performance and the radial vibration following performance of the arc sealing surfaces of the first arc sealing section 3 and the second arc sealing section 9 on the metal sealing ring body 1 and the surfaces of the upper flange 10 and the surfaces of the fully-closed lower flange 11 or the semi-closed lower flange 12 in dynamic working conditions are effectively realized, and the good contact between the arc sealing surfaces of the first arc sealing section 3 and the second arc sealing section 9 on the metal sealing ring body 1 and the surfaces of the upper flange 10 and the surfaces of the fully-closed lower flange 11 or the semi-closed lower flange 12 is realized, and the sealing performance of the metal sealing ring body 1 is further improved; in addition, the metal sealing ring body 1 is a self-tightening sealing ring, the W-shaped opening 2 is arranged in the circumferential direction of the metal sealing ring body 1 and faces the inside of the sealing system, and under the working state, the W-shaped opening 2 in the circumferential direction of the metal sealing ring body 1 is opened by the internal pressure of the sealing system, so that the contact stress and the contact width between the arc-shaped sealing surfaces of the first arc-shaped sealing section 3 and the second arc-shaped sealing section 9 on the metal sealing ring body 1 and the surface of the upper flange 10 and the surface of the totally-closed lower flange 11 or the semi-closed lower flange 12 are increased, and the optimal sealing performance of the metal sealing ring body 1 is ensured.
Secondly, the utility model carries out parameterization modeling on the metal sealing ring body 1, adopts a numerical simulation orthogonal test method, carries out analysis and calculation of the sealing performance of the metal sealing ring body 1 by using ANSYS general finite element analysis software, and establishes a multiple linear regression equation of the metal sealing ring body 1 about main structural parameters thereof by using MATLAB software according to the calculation result of the multi-index numerical simulation orthogonal simulation test. In order to ensure the sealing performance, the maximum value of the contact stress is found under the condition that the maximum Von-Mises equivalent stress does not exceed the yield limit of the material. Solving extremum of the opening height H, the wall thickness T, the wave height H, the root arc radius R1 of the U shape of the wave trough, the root arc radius R2 of the U shape of the wave crest, the arc curvature radius R3 of the arc sealing section and the arc curvature radius R4 of the arc transition connecting section of the cross section W-shaped geometric shape of the metal sealing ring body 1 in the limiting range of each structural parameter through C language programming, and obtaining the structural parameter corresponding to the extremum; in the embodiment of the utility model, the curvatures of the arc sealing surface of the first arc sealing section 3 and the arc sealing surface of the second arc sealing section 9 of the axially-opened W-shaped opening arranged on the circumferential end surface of the metal sealing ring body 1 are selected to be 0; and then ANSYS simulation is carried out on the optimized structure, and the result is checked, so that the reliability of the optimized design is proved, and the sealing performance, rebound performance and stability of the metal sealing ring body are improved to the greatest extent.
In order to cope with the different working environments of the metal sealing ring body 1, the metal sealing ring body 1 is made of nickel-based superalloy steel strips, meanwhile, different surface treatment methods are selectively carried out on the W-shaped openings 2 with different directions in the circumferential direction of the metal sealing ring body 1, soft metal layers are coated or electroplated on the arc-shaped sealing surfaces of the arc-shaped sealing sections of the W-shaped openings 2 which are arranged in the circumferential direction of the metal sealing ring body 1 and are radially inwards or outwards, and the soft metal materials are metallic silver or metallic nickel, so that the soft metal layers coated or electroplated on the arc-shaped sealing surfaces of the arc-shaped sealing sections on the metal sealing ring body 1 and the contact sealing surfaces of the upper flange and the lower flange can generate plastic deformation and expansion under the action of contact stress, and tiny leakage channels between the arc-shaped sealing surfaces of the arc-shaped sealing sections on the metal sealing ring body 1 and the contact sealing surfaces of the upper flange and the lower flange can be compensated, and the initial sealing effect is achieved; the surface of the axially-opened W-shaped opening 2 arranged on the circumferential end surface of the metal sealing ring body 1 is treated by adopting a chromium aluminum nitride coating (AlCrN), so that the abrasion and friction resistance of the sealing surface of the arc-shaped sealing section on the metal sealing ring body 1 and the sealing surface of the arc-shaped sealing section on the metal sealing ring body 1 to be sealed and the cylindrical shaft surface are effectively reduced during interference fit assembly, and the sealing performance and the service life of the metal sealing ring body 1 are greatly improved.
In the actual use process of the metal seal ring body 1, the following embodiments exist:
in the first embodiment, as shown in fig. 6, when the pressure born by the sealing system is internal pressure, the metal sealing ring body 1 with the W-shaped opening 2 facing radially inwards is adopted, the metal sealing ring body 1 with the W-shaped opening 2 facing radially inwards in the circumferential direction is installed in the annular groove of the fully-closed lower flange 11, when the upper flange 10 and the fully-closed lower flange 11 are screwed up by connecting bolts, the metal sealing ring body 1 is elastically and axially compressed, the arc sealing surfaces of the first arc sealing section 3 and the second arc sealing section 9 of the metal sealing ring body 1 are elastically deformed with the surfaces of the upper flange 10 and the fully-closed lower flange 11, and the initial deformation is in line contact, so that the initial sealing is established. When the working pressure rises, the sealing surface of the upper flange 10 and the sealing surface of the totally-enclosed lower flange 11 are separated from each other, and meanwhile, the W-shaped opening 2 of the metal sealing ring body 1 is axially opened to compensate for the reduction of sealing specific pressure caused by the separation of the sealing surface of the upper flange 10 and the sealing surface of the totally-enclosed lower flange 11; along with the continuous increase of working pressure, the W-shaped opening 2 of the metal sealing ring body 1 is further opened and is pressed more and more tightly with the sealing surface of the upper flange 10 and the sealing surface of the totally-enclosed lower flange 11, so that the contact stress and the contact width between the arc-shaped sealing surface of the first arc-shaped sealing section 3 and the arc-shaped sealing surface of the second arc-shaped sealing section 9 and the sealing surface of the upper flange 10 and the sealing surface of the totally-enclosed lower flange 11 are increased, the sealing performance of the metal sealing ring body 1 is ensured, and the initial line contact is changed into wide-area contact, so that the sealing of a system fluid medium is achieved.
In a second embodiment, as shown in fig. 7, when the pressure born by the sealing system is external pressure or a vacuum system, the metal sealing ring body 1 with the radially outward W-shaped opening 2 is adopted, the metal sealing ring body 1 with the radially outward W-shaped opening 2 is installed in the annular groove of the semi-closed lower flange 12, when the upper flange 10 and the semi-closed lower flange 12 are screwed up by using connecting bolts, the metal sealing ring body 1 is elastically compressed axially, the arc-shaped sealing surfaces of the first arc-shaped sealing segment 3 and the second arc-shaped sealing segment 9 of the metal sealing ring body 1 are elastically deformed with the surfaces of the upper flange 10 and the semi-closed lower flange 12, the initial deformation stage is in line contact, so that initial sealing is established, when the working pressure is increased, the sealing surfaces of the upper flange 10 and the sealing surfaces of the semi-closed lower flange 12 are separated from each other, meanwhile, the sealing specific pressure of the W-shaped opening 2 of the metal sealing ring body 1 is axially expanded, the expansion of the working pressure is compensated, and the arc-shaped opening 2 of the metal sealing ring body 1 is further expanded and is further expanded with the expansion of the working pressure, the working pressure is increased, and the arc-shaped sealing ring body is enabled to contact the arc-shaped sealing ring body 10 and the arc-shaped sealing ring body 2 and the arc-shaped sealing ring body. And from initial line contact to broadband contact, thereby achieving a seal against the system fluid medium.
In a third embodiment, as shown in fig. 8, when the pressure to which the sealing system is subjected is an axial pressure, a metal seal ring body 1 having an end face axially W-shaped opening 2 is employed. The sealing system consists of a front exhaust pipe 13, a rear exhaust pipe 14 and a metal sealing ring body 1, wherein one end of the rear exhaust pipe 14 is inserted into the front exhaust pipe 13 to be connected with the front exhaust pipe 13, the joint end of the front exhaust pipe 13 and the joint end of the rear exhaust pipe 14 are in spigot positioning connection, the inner wall of the joint end of the front exhaust pipe 13 is provided with a first inner step part and a second inner step part, the front end inner hole of a pipe mouth of the front exhaust pipe 13 is provided with a guide inclined plane, the outer wall of the joint end of the rear exhaust pipe 14 is provided with a third outer step part, a sealing ring groove is formed between the second inner step part and the third outer step part, the metal sealing ring body 1 is installed in the sealing ring groove, and as the metal sealing ring body 1 is in interference fit with the front exhaust pipe 13 and the rear exhaust pipe 14, the sealing surface of an outer ring first arc-shaped sealing section 3 of the metal sealing ring body 1 is tightly attached to the inner wall surface of the front exhaust pipe 13, the sealing surface of an inner ring second arc-shaped sealing section 9 of the metal sealing ring body 1 is tightly attached to the outer side surface of the rear exhaust pipe 14, the metal sealing ring body 1 is elastically compressed radially, the sealing ring first arc-shaped sealing section 3 and the outer ring 14 is elastically deformed initially, and the initial deformation is established. Under actual working conditions, the sealing surface of the arc-shaped sealing section of the metal sealing ring body 1 can be separated from the inner wall surface of the front exhaust pipe 13 and the outer side surface of the rear exhaust pipe 14 due to the fluctuation of exhaust temperature and pressure or deformation of the exhaust pipe under the action of cold and hot stress, and the like, and at the moment, the sealing surface of the arc-shaped sealing section of the metal sealing ring body 1 can still be contacted and attached with the microscopically uneven parts of the inner wall surface of the front exhaust pipe 13 and the outer side surface of the rear exhaust pipe 14 due to good rebound performance and larger contact stress and elastic deformation when the metal sealing ring body 1 is subjected to radial compression before, so that the sealing effect is achieved. In addition, the metal sealing ring body 1 is a self-tightening sealing ring, the direction of the end surface axial W-shaped opening 2 of the metal sealing ring body 1 faces the inside of the sealing system and is the same as the air flow direction, under the working state, the inner pressure enables the end surface axial W-shaped opening 2 of the metal sealing ring body 1 to be radially opened, so that the contact stress and the contact width between the sealing surface of the first arc-shaped sealing section 3 and the sealing surface of the second arc-shaped sealing section 9 of the metal sealing ring body 1 and the inner wall surface of the front exhaust pipe 13 and the outer side surface of the rear exhaust pipe 14 are increased, the sealing performance of the metal sealing ring body 1 is ensured, and the initial line contact is changed into the wide-area contact, so that the sealing of a system fluid medium is achieved.
The self-tightening W-shaped metal sealing ring is a sealing ring with self-tightening sealing characteristics, is particularly suitable for flange plate connectors with compact sealing structure size, limited strength and insufficient pretightening force, such as important sealing systems of an exhaust pipe sealing system for tail gas aftertreatment of an engine, a sealing system at a joint between an ultrahigh vacuum pressure container flange and the like, has the characteristics of convenience in use, long service life, good sealing effect and the like, and has extremely high practicality and popularization significance.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. A self-tightening W-shaped metal sealing ring is characterized in that: the metal seal ring comprises a circular metal seal ring body (1), wherein the metal seal ring body (1) is a hollow circular metal ring, and W-shaped openings (2) which are radially inwards, radially outwards or axially opened are respectively arranged on the circumference of an inner ring or an outer ring or an end face of the circular metal seal ring body (1), so that the metal seal ring body (1) forms a circular annular elastic whole with the W-shaped openings (2) in the circumferential direction of the body.
2. The self-tightening W-shaped metal sealing ring according to claim 1, wherein the metal sealing ring body (1) is a revolving body with a W-shaped cross section, the W-shaped cross section comprises a first arc-shaped sealing section (3), a first arc-shaped transitional coupling section (4), a first elastic trough section (5), an elastic peak section (6) for adjusting the radial direction, a second elastic trough section (7), a second arc-shaped transitional coupling section (8) and a second arc-shaped sealing section (9) which are sequentially connected, and the first elastic trough section (5), the first arc-shaped transitional coupling section (4), the first arc-shaped sealing section (3) and the second elastic trough section (7), the second arc-shaped transitional coupling section (8) and the second arc-shaped sealing section (9) are all in mirror symmetry structures.
3. The self-tightening W-shaped metal sealing ring according to claim 1, wherein the cross-sectional shape of the metal sealing ring body (1) is W-shaped, the cross-sections of the first elastic trough section (5), the second elastic trough section (7) and the elastic crest section (6) for adjusting the radial direction which form the W-shaped cross-sectional shape structure are all U-shaped, the root of the trough section U-shaped is an arc with radius R1, the root of the crest section U-shaped is an arc with radius R2, two parallel line sections connected with the arc of the U-shaped root are wave height h, and the first arc-shaped sealing section (3) and the second arc-shaped sealing section (9) are arcs with radius of curvature R3; the first arc-shaped transition connecting section (4) and the second arc-shaped transition connecting section (8) are arcs with a curvature radius R4.
4. Self-tightening W-shaped metal sealing ring according to claim 1, characterized in that the curvatures of the sealing surface of the first arcuate sealing segment (3) and the sealing surface of the second arcuate sealing segment (9) of the axially open W-shaped opening (2) provided on the circumferential end face of the metal sealing ring body (1) are 0.
5. Self-tightening W-shaped metal sealing ring according to claim 1, characterized in that the metal sealing ring body (1) is provided with sealing rings of three structural types, namely sealing internal pressure, sealing external pressure or radial sealing circular holes and cylindrical shafts, depending on the position of the W-shaped opening (2).
6. The self-tightening W-shaped metal sealing ring according to claim 1, wherein the metal sealing ring body (1) is made of nickel-based superalloy steel strips.
7. A self-tightening W-shaped metal sealing ring according to claim 1, characterized in that the sealing surface of the arc-shaped sealing section of the radially inward or radially outward W-shaped opening (2) provided in the circumferential direction of the metal sealing ring body (1) is coated or electroplated with a soft metal layer, and that the surface coated or electroplated soft metal layer material is metallic silver or metallic nickel.
8. Self-tightening W-shaped metal sealing ring according to claim 1, characterized in that the surface of the axially open W-shaped opening (2) provided in the circumferential end face of the metal sealing ring body (1) is subjected to a chromium aluminium nitride coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222481367.2U CN218914091U (en) | 2022-09-20 | 2022-09-20 | Self-tightening W-shaped metal sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222481367.2U CN218914091U (en) | 2022-09-20 | 2022-09-20 | Self-tightening W-shaped metal sealing ring |
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| CN218914091U true CN218914091U (en) | 2023-04-25 |
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|---|---|---|---|
| CN202222481367.2U Active CN218914091U (en) | 2022-09-20 | 2022-09-20 | Self-tightening W-shaped metal sealing ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117145655A (en) * | 2023-10-27 | 2023-12-01 | 西安现代控制技术研究所 | Flexible heat-proof sealing structure for jet pipe and tail cabin of solid rocket engine |
-
2022
- 2022-09-20 CN CN202222481367.2U patent/CN218914091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117145655A (en) * | 2023-10-27 | 2023-12-01 | 西安现代控制技术研究所 | Flexible heat-proof sealing structure for jet pipe and tail cabin of solid rocket engine |
| CN117145655B (en) * | 2023-10-27 | 2024-03-19 | 西安现代控制技术研究所 | Flexible heat-proof sealing structure for jet pipe and tail cabin of solid rocket engine |
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