CN117145962A - Method for improving deformation elasticity of fluid seal C-shaped sealing ring - Google Patents
Method for improving deformation elasticity of fluid seal C-shaped sealing ring Download PDFInfo
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- CN117145962A CN117145962A CN202311418906.0A CN202311418906A CN117145962A CN 117145962 A CN117145962 A CN 117145962A CN 202311418906 A CN202311418906 A CN 202311418906A CN 117145962 A CN117145962 A CN 117145962A
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- ring
- shaped metal
- elastic bag
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- 238000007789 sealing Methods 0.000 title claims abstract description 298
- 239000012530 fluid Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 148
- 239000002184 metal Substances 0.000 claims abstract description 148
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000005060 rubber Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229920001774 Perfluoroether Polymers 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical compound FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 229910001080 W alloy Inorganic materials 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 claims description 6
- XJNCHICLWKVTQA-UHFFFAOYSA-N [Mo].[W].[Cr].[Ni] Chemical compound [Mo].[W].[Cr].[Ni] XJNCHICLWKVTQA-UHFFFAOYSA-N 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- SYCBLWWKDXQZRR-UHFFFAOYSA-N [Ni].[W].[Cr] Chemical compound [Ni].[W].[Cr] SYCBLWWKDXQZRR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims description 2
- 238000007906 compression Methods 0.000 abstract description 45
- 230000006835 compression Effects 0.000 abstract description 44
- 239000004033 plastic Substances 0.000 abstract description 8
- 230000007423 decrease Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 92
- 230000008602 contraction Effects 0.000 description 10
- 230000005489 elastic deformation Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/08—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction with expansion obtained by pressure of the medium
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring belongs to the technical field of mechanical sealing elements, the method adopts variable thickness rolling to prepare a metal sheet, a die bundle type rolling metal sheet is adopted to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, and two ends of the long axis of the ellipse are contacted with the sealed medium; the thickness of the section of the C-shaped sealing gasket is gradually changed, and the thickness gradually decreases from the end point of the elliptical short axis to the end point of the long axis; an inner cavity of the C-shaped metal sealing ring is provided with an inflatable elastic bag ring. The invention designs the C-shaped sealing ring with the gradually-changed thickness and elliptical cross section, can improve the compression load of the C-shaped metal sealing ring while not changing the structure of the C-shaped sealing ring in a large range, and the additional inflatable elastic bag ring in the cavity of the metal sealing ring can compensate the rebound pressure, improve the plastic deformation rebound quantity, assist in resetting and prolong the service life, thereby having good practical value.
Description
Technical Field
The invention belongs to the technical field of mechanical sealing elements, and particularly relates to a method for improving deformation elasticity of a fluid sealing C-shaped sealing ring.
Background
The traditional conventional mechanical sealing ring is prepared from rubber, asbestos, polytetrafluoroethylene and the like, has higher elastic deformation, requires smaller pretightening force and can realize good sealing effect; but when the sealing material is used under the conditions of high temperature, high pressure, high impact and frequent fluctuation of working environment, the sealing material has the defects of high temperature difference resistance, low strength, damage, gradually weakened sealing performance and short service life. Therefore, a sealing ring made of metal is developed, but the elastic deformation of the metal sealing ring is small, the required pretightening force is large, if the pretightening force is not met, the sealing tightness is very poor, the good sealing effect is not achieved, and the capability of automatically adjusting the thermal expansion and the contraction is almost not achieved, so that the metal sealing ring is limited by the working environment, and the application of the metal sealing ring is limited in aero-engines, high-temperature and high-pressure sealing systems in particular. And the metal sealing ring is further improved into a C-shaped sealing ring so as to improve the elastic deformation of the metal C-shaped structure, and in the compression process, the C-shaped ring is axially and elastically compressed, so that the C-shaped sealing ring and the sealing surface are tightly combined in a linear sealing mode, and the compression load of the sealing element, namely the plastic deformation pressure, is determined by the metal material.
At present, the deformation elasticity of the C-shaped metal sealing ring is poor, for example, the temperature of gas in a gas flow channel can be increased in the working process of an aeroengine, the size of the gas flow channel is influenced to generate thermal expansion, the C-shaped metal sealing ring is further compressed, part of the elastic deformation of the C-shaped metal sealing ring can be converted into plastic deformation, and when the aeroengine does not work, the size of the gas flow channel is cooled and contracted, and the plastic deformation is difficult to rebound and seal; in the past, can reduce the elastic deformation ability of C type metal seal circle by a wide margin, make the sealing contact pressure value that C type metal seal circle needs grow, reduce the packing force to the sealing washer when the air current way cooling, can lead to leaking, life is short, takes place the incident even. Namely, when the sealing contact pressure is larger than the pressure of the sealed medium, the sealing effect is maintained; when the sealing contact pressure is smaller than the pressure of the sealed medium, the C-shaped ring is pushed away, and a large amount of medium leakage occurs. In this regard, CN102537350B discloses a seal ring and an aeroengine having the seal ring, wherein the "C-shape" of the seal ring is replaced by "W-shape" to improve the elastic deformation performance of the seal ring and improve the rebound sealing effect. However, the W-shaped structure has the advantages of very high molding and preparing difficulty, high manufacturing cost, low yield and poor economical practicability; especially in the sealing ring field of high accuracy, the precision requirement is very high, and the complicated structure means that the precision is difficult to guarantee, and the preparation technology of the continuous C-shaped ring is overcome in China, so that domestic independent production is realized.
Disclosure of Invention
The method aims at the problems that the existing C-shaped metal sealing ring is poor in elastic deformation performance, easy to generate plastic deformation, difficult to recover the reset sealing after plastic deformation, high in preparation precision difficulty of the special-shaped metal sealing ring, low in yield and high in manufacturing cost. The invention provides a method for improving deformation elasticity of a fluid sealing C-shaped sealing ring, which is characterized in that the C-shaped sealing ring with gradually-changed thickness and oval cross section is designed, the compression load of a C-shaped metal sealing ring can be improved while the structure of the C-shaped sealing ring is not changed in a large range, the rebound pressure can be compensated by adding an inflatable elastic bag ring in a cavity of the metal sealing ring, the plastic deformation rebound quantity is improved, the auxiliary reset is realized, and the service life is prolonged. The specific technical scheme is as follows:
a method for improving deformation elasticity of a fluid seal C-shaped sealing ring comprises the following steps: preparing a metal sheet by variable thickness rolling, and preparing a C-shaped metal sealing ring by adopting a die bundle type rolling metal sheet, wherein the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface or the outer side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; the inner cavity of the C-shaped metal sealing ring is provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is filled with gas.
In the above technical solution, the length ratio parameter of the long and short axes of the ellipse is that the long axis and the short axis=1 (0.5-0.9).
In the technical scheme, the central line of the opening coincides with the short axis of the ellipse; the width of the opening is (5-8)/10 of the length of the long axis.
In the technical scheme, the thickness of the section of the C-shaped metal sealing ring is gradually changed from the elliptical short axis end point to the major axis end point, the thickness of the elliptical short axis end point is 0.20-0.35 mm, and the thickness of the elliptical long axis end point is 0.10-0.15 mm.
In the technical scheme, the C-shaped metal sealing ring is made of nickel-chromium-molybdenum-tungsten alloy, nickel-chromium-molybdenum alloy, nickel-chromium-tungsten alloy or precipitation strengthening nickel-based superalloy.
In the technical scheme, the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a 'inner tube' mode after being inflated, is limited by the inner cavity of the C-shaped metal sealing ring, and is an air bag with an elliptical section.
In the technical scheme, the gas in the inflatable elastic bag ring is nitrogen, carbon dioxide or inert gas.
In the technical scheme, the wall thickness of the inflatable elastic bag ring is more than 0.15mm.
In the technical scheme, the inflatable elastic bag ring is made of high-temperature resistant elastic materials.
In the technical scheme, the inflatable elastic bag ring is made of perfluoroether rubber containing 3-8 mass percent of flexible graphite.
In the technical scheme, a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, and the width of the gap is smaller than 1/5 of the length of the long axis of the C-shaped metal sealing ring.
In the technical scheme, the C-shaped metal sealing ring is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Compared with the prior art, the method for improving the deformation elasticity of the fluid seal C-shaped sealing ring has the beneficial effects that:
1. the cross section of the C-shaped metal sealing ring is designed to be elliptical, the thickness of the end point of the short shaft is designed to be thickened, the compression load can be increased, the gradual thickening ensures elliptical deformation and resetting, the end point of the long shaft is thinner, the linear sealing surface can be formed by extrusion more easily, the area of the sealing surface is larger, and the sealing performance is better.
2. The method designs that the inner cavity of the C-shaped metal sealing ring is provided with the tightly attached inflatable elastic bag ring, so that the compression load of the sealing ring can be increased in an auxiliary manner, and the rebound force can be supplemented, and particularly when the C-shaped metal sealing ring is subjected to plastic deformation, elastic compensation force is provided for the metal sealing ring, so that a good reset amount is achieved. And the sealing ring is fully attached to the inner wall of the metal ring, so that stress unbalance is not generated, the metal ring is ensured not to deform asymmetrically left and right of the short shaft, and the service life is prolonged.
3. The method designs the C-shaped metal sealing ring opening to be a ring inner opening or a ring outer opening, wherein the inner opening is in the prior conventional technology, and the ring outer opening is designed by the method, so that the ring outer opening can protect fluid in a machine from being polluted by the material of the inflatable elastic bag ring; the inflatable elastic bag ring which is tightly attached to the opening at the inner side of the ring can protect the inner side surface of the metal ring from being corroded by fluid in the machine, and has the advantages.
4. The method designs the opening width of the C-shaped metal sealing ring to be (5-8)/10 of the length of the long shaft, and the two ends of the C-shaped metal sealing ring are buckled inwards, so that the inflatable elastic bag ring can be restrained from falling out, and the combination stability is ensured.
5. The method designs the inflatable elastic bag ring to be inflated with nitrogen, carbon dioxide or inert gas, and has gas stability.
6. The wall thickness of the inflatable elastic bag ring designed by the method is more than 0.15mm, so that the service life of the inflatable elastic bag ring can be ensured.
7. According to the design of the method, a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, so that the compensating rebound pressure of the two ends of the long axis of the C-shaped sealing ring can be relieved, and the two ends of the long axis of the C-shaped sealing ring can form a linear sealing surface.
8. The inflatable elastic bag ring is made of perfluoroether rubber containing 3-8 mass percent of flexible graphite, and has the advantages of high temperature resistance, corrosion resistance, pressure resistance, good inflation rebound resilience, firmness and durability, and long service life.
In conclusion, the method for improving the deformation elasticity of the C-shaped metal sealing ring has the advantages of simple structure, low precision requirement, easy production and good practical value.
Detailed Description
The invention will be further illustrated with reference to specific examples, but the invention is not limited to these examples.
Example 1
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.8; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 8/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.20mm, and the thickness of the long axis end point is 0.12mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; the inflation gas of the inflatable elastic bag ring is nitrogen; the wall thickness of the inflatable elastic bag ring is 0.25mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 5 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 1.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.12mm; other parameters are the same as in the present embodiment.
Comparative example 1.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 1.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.12mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 1.1, comparative example 1.2 and comparative example 1.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 1.1 > the compression load of comparative example 1.2 > the compression load of comparative example 1.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 1.1, the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 1.2, and the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 1.3.
Example 2
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.7; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 7.5/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.25mm, and the thickness of the long axis end point is 0.14mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; the inflation gas of the inflatable elastic bag ring is nitrogen; the wall thickness of the inflatable elastic bag ring is 0.20mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 3.5 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 2.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.14mm; other parameters are the same as in the present embodiment.
Comparative example 2.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 2.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.14mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 2.1, comparative example 2.2 and comparative example 2.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 2.1 > the compression load of comparative example 2.2 > the compression load of comparative example 2.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 2.1, the rebound reset of the sealing ring of the comparative example 2.2 is larger than that of the sealing ring of the comparative example 2.3.
Example 3
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.6; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 7/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point, the thickness of the short axis end point is 0.22mm, and the thickness of the long axis end point is 0.13mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, and the width of the gap is less than 1.5/10 of the length of the long axis of the C-shaped metal sealing ring; the inflation gas of the inflatable elastic bag ring is nitrogen; the wall thickness of the inflatable elastic bag ring is 0.3mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 4 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 3.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.13mm; other parameters are the same as in the present embodiment.
Comparative example 3.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 3.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.13mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 3.1, comparative example 3.2 and comparative example 3.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 3.1 > the compression load of comparative example 3.2 > the compression load of comparative example 3.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 3.1, the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 3.2, and the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 3.3.
Example 4
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.5; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 5/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.35mm, and the thickness of the long axis end point is 0.15mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum-tungsten alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, and the width of the gap is less than 1/10 of the length of the long axis of the C-shaped metal sealing ring; the inflation gas of the inflatable elastic bag ring is nitrogen; the wall thickness of the inflatable elastic bag ring is 0.4mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 4.5 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 4.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.15mm; other parameters are the same as in the present embodiment.
Comparative example 4.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 4.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.15mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 4.1, comparative example 4.2 and comparative example 4.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 4.1 > the compression load of comparative example 4.2 > the compression load of comparative example 4.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is greater than that of the comparative example 4.1, the rebound reset of the sealing ring of the comparative example 4.2, and the rebound reset of the sealing ring of the embodiment is greater than that of the sealing ring of the comparative example 4.3.
Example 5
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the outer side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.9; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 6/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.26mm, and the thickness of the long axis end point is 0.14mm; the C-shaped metal sealing ring is made of nickel-chromium-tungsten alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, and the width of the gap is less than 1.8/10 of the length of the long axis of the C-shaped metal sealing ring; the inflation gas of the inflatable elastic bag ring is carbon dioxide; the wall thickness of the inflatable elastic bag ring is 0.35mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 3 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 5.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.14mm; other parameters are the same as in the present embodiment.
Comparative example 5.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 5.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.14mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 5.1, comparative example 5.2 and comparative example 5.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 5.1 > the compression load of comparative example 5.2 > the compression load of comparative example 5.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 5.1, the rebound reset of the sealing ring of the comparative example 5.2, and the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 5.3.
Example 6
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the outer side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.75; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 7.5/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.30mm, and the thickness of the long axis end point is 0.15mm; the C-shaped metal sealing ring is made of precipitation strengthening nickel-based superalloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; the inflation gas of the inflatable elastic bag ring is argon; the wall thickness of the inflatable elastic bag ring is 0.25mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 6 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 6.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.15mm; other parameters are the same as in the present embodiment.
Comparative example 6.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 6.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.15mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 6.1, comparative example 6.2 and comparative example 6.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 6.1 > the compression load of comparative example 6.2 > the compression load of comparative example 6.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 6.1, the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 6.2, and the rebound reset of the sealing ring of the embodiment is larger than that of the comparative example 6.3.
Example 7
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the outer side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.85; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 6.5/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.24mm, and the thickness of the long axis end point is 0.12mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum alloy; in addition, the inner cavity of the C-shaped metal sealing ring is also provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is tightly embedded in the inner cavity of the C-shaped metal sealing ring in a vehicle inner tube mode after being inflated and limited by the inner cavity of the C-shaped metal sealing ring to form an air bag with an elliptical section; the inflation gas of the inflatable elastic bag ring is helium; the wall thickness of the inflatable elastic bag ring is 0.18mm; the inflatable elastic bag ring is made of perfluoroether rubber containing 8 mass percent of flexible graphite.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 7.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.12mm; other parameters are the same as in the present embodiment.
Comparative example 7.2 was prepared: the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
Comparative example 7.3 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.12mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the present example, comparative example 7.1, comparative example 7.2 and comparative example 7.3 were used under the same conditions, respectively, the compression load of the seal ring of the present example > the compression load of comparative example 7.1 > the compression load of comparative example 7.2 > the compression load of comparative example 7.3 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is greater than that of the comparative example 7.1, the rebound reset of the sealing ring of the comparative example 7.2, and the rebound reset of the sealing ring of the embodiment is greater than that of the sealing ring of the comparative example 7.3.
Example 8
A method for improving deformation elasticity of a fluid seal C-shaped sealing ring adopts variable thickness rolling to prepare a metal sheet, adopts a die bundle type rolling metal sheet to prepare the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; wherein, the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1:0.88; the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is 7.5/10 of the length of the long shaft; the thickness of the section of the C-shaped metal sealing ring is gradually changed from the short axis end point of the ellipse to the long axis end point of the ellipse, the thickness of the short axis end point is 0.20mm, and the thickness of the long axis end point is 0.10mm; the C-shaped metal sealing ring is made of nickel-chromium-molybdenum-tungsten alloy.
The C-shaped metal sealing ring of the embodiment is used for fluid sealing of mechanical equipment with temperature difference change expansion and contraction and is also used for fluid sealing of constant-temperature mechanical equipment.
Comparative example 8.1 was prepared: the C-shaped sealing ring is an equal-thickness sealing ring, and the thickness is 0.10mm; other parameters are the same as in the present embodiment.
Comparative example 8.2 (conventional seal ring) was prepared: the C-shaped sealing ring is circular (non-elliptical) in cross section, the C-shaped sealing ring is a sealing ring with equal thickness of 0.10mm, and the inner cavity of the C-shaped sealing ring is not provided with an inflatable elastic bag ring; other parameters are the same as in the present embodiment.
After the sealing rings of the present example, the comparative example 8.1 and the comparative example 8.2 were used under the same conditions, the compression load of the sealing ring of the present example > the compression load of the comparative example 8.1 > the compression load of the comparative example 8.2 was obtained; and after the pressure exceeding 5% of the compression load of the metal sealing ring is applied and is released after the pressure is stopped for 2 hours, the rebound reset of the sealing ring of the embodiment is measured, wherein the rebound reset of the sealing ring of the embodiment is greater than that of the comparative example 8.1 and greater than that of the comparative example 8.2.
Claims (10)
1. A method for improving deformation elasticity of a fluid seal C-shaped sealing ring is characterized in that a metal sheet is prepared by variable thickness rolling, a die bundle type rolling metal sheet is used for preparing the C-shaped metal sealing ring, and the section of the C-shaped metal sealing ring is elliptical with one side open; the opening is positioned on one of the long-axis cambered surfaces of the ellipse, namely the inner side surface or the outer side surface of the ring; when sealing, the two ends of the elliptic long axis contact the sealed medium; the inner cavity of the C-shaped metal sealing ring is provided with an inflatable elastic bag ring, and the inflatable elastic bag ring is filled with gas.
2. The method for improving the deformation elasticity of the fluid seal C-shaped sealing ring according to claim 1, wherein the length proportion parameter of the long and short axes of the ellipse is that the long axis and the short axis=1, (0.5-0.9); the center line of the opening coincides with the minor axis of the ellipse; the width of the opening is (5-8)/10 of the length of the long shaft.
3. The method for improving the deformation elasticity of the fluid seal C-shaped sealing ring according to claim 1, wherein the thickness of the cross section of the C-shaped metal sealing ring is gradually changed from the end point of the elliptical short axis to the end point of the long axis, the thickness of the end point of the elliptical short axis is 0.20 mm-0.35 mm, and the thickness of the end point of the elliptical long axis is 0.10 mm-0.15 mm.
4. A method for improving deformation elasticity of a fluid seal C-shaped sealing ring according to claim 1 or 3, wherein the C-shaped metal sealing ring is made of nickel-chromium-molybdenum-tungsten alloy, nickel-chromium-molybdenum alloy, nickel-chromium-tungsten alloy or precipitation-strengthened nickel-based superalloy.
5. A method for improving deformation elasticity of a fluid seal C-shaped sealing ring according to claim 1 or 3, wherein the inflatable elastic bag ring is tightly embedded in an inner cavity of the C-shaped metal sealing ring in a form of a vehicle inner tube after being inflated and limited by the inner cavity of the C-shaped metal sealing ring, and is an air bag with an elliptical cross section.
6. The method for improving deformation elasticity of a fluid seal C-shaped sealing ring according to claim 5, wherein the gas in the inflatable elastic bag ring is nitrogen, carbon dioxide or inert gas.
7. The method for improving the deformation elasticity of a fluid seal C-shaped sealing ring according to claim 5, wherein the wall thickness of the inflatable elastic bag ring is more than 0.15mm.
8. The method for improving deformation elasticity of a fluid seal C-shaped sealing ring according to claim 5, wherein the inflatable elastic bag ring is made of high-temperature-resistant and corrosion-resistant elastic materials.
9. The method for improving the deformation elasticity of the fluid seal C-shaped sealing ring according to claim 8, wherein the inflatable elastic bag ring is made of perfluoroether rubber containing 3-8% of flexible graphite by mass percent.
10. The method for improving the deformation elasticity of a fluid seal C-shaped sealing ring according to claim 5, wherein a gap is reserved between the end part of the elliptic long axis of the inflatable elastic bag ring and the inner cavity of the C-shaped metal sealing ring, and the width of the gap is less than 1/5 of the length of the long axis of the C-shaped metal sealing ring.
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| CN202311418906.0A CN117145962B (en) | 2023-10-30 | 2023-10-30 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
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