CN104265892A - Composite sealing ring for low-temperature valve - Google Patents
Composite sealing ring for low-temperature valve Download PDFInfo
- Publication number
- CN104265892A CN104265892A CN201410476700.8A CN201410476700A CN104265892A CN 104265892 A CN104265892 A CN 104265892A CN 201410476700 A CN201410476700 A CN 201410476700A CN 104265892 A CN104265892 A CN 104265892A
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- China
- Prior art keywords
- metal
- energy storage
- storage spring
- sealing ring
- ratio
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
-
- 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
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to a composite sealing ring for a low-temperature valve, and belongs to the technical field of fluid control valves. The sealing ring comprises a sealing ring jacket made of modified polytrifluorochloroethylene, a hollow metal energy storage spring with a circular section is clamped in an annular groove with a C-shaped section formed by the section of the sealing ring jacket and comprises a spring strap wound outside a metal rubber ring with the circular section, the ratio of the inner distance between two surrounding edges in a natural state to the diameter of the metal energy storage spring is 0.7-0.9, the ratio of the maximum outer distance formed by unfolding the two surrounding edges after clamping the metal energy storage spring and the length of a base edge to the depth of a sealing groove to be embedded is 1.1-1.3, and metal materials in the metal rubber ring are as same as those of the metal energy storage spring. The sealing ring appropriately solves the problem of serious reduction of sealing specific pressure caused by the expansion coefficient difference between a nonmetal material and a metal material at a low temperature and solves the problem that the materials are hard and brittle at a deep-cold temperature, and reliable sealing of the valve in a -196 DEG C to -269 DEG C ultra-low temperature environment can be practically achieved.
Description
Technical field
The present invention relates to a kind of seal ring, particularly relate to a kind of composite sealing ring for Subzero valve, belong to fluid control valve technical field.
Background technique
Oil, chemical industry and gas industry develop rapidly as a kind of emerging energy along with LNG Liquefied natural gas (LNG).Rock gas Main Ingredients and Appearance is methane, through dehydration, refining and cooling, under-162 DEG C of low temperature, is cooled to LNG Liquefied natural gas.The distinguishing feature of LNG is that under equivalent standard state, the volume of gas is about 600 times of liquid volume.People utilize this feature of LNG, make the storage of LNG, transport convenient, and storage and transport in can save a large amount of costs.Because the temperature under LNG normal pressure is-162 DEG C, and inflammable and explosive, therefore when designing LNG Cryogenic valve, higher and stricter requirement is proposed to its sealability.
For a long time, the sealing carrying out the Subzero valve of Trimmed sums adjustment to ultralow temperature liquid medium (-196 DEG C--269 DEG C) is a difficult problem always.Because under low-temperature condition, the expansion coefficient of nonmetallic material is much bigger compared with metallic material, easily make contour projector during its low temperature differ comparatively large with the contour projector of the counterpart such as metal seal, valve body, thus cause seal pressure seriously to reduce and produce the result that cannot seal.And most of nonmetallic material at cryogenic temperature can be hardening and become fragile, and loses toughness, thus cause cold flow and stress relaxation, thus can cause seal failure.In addition, under cryogenic, the intensity of metallic material and hardness improve, and plasticity and toughness reduce, and show brittle fracture under low temperature phenomenon in various degree, badly influence the sealability of valve.
Summary of the invention
The object of the invention is to: for the difficult problem faced by above-mentioned prior art, propose one can the guarantee reliable sealing composite sealing ring for Subzero valve at-196 DEG C of--269 DEG C of ultra-low temperature surroundings.
In order to achieve the above object, the present invention is used for the seal ring chuck that the composite sealing ring of Subzero valve comprises modification polychlorotrifluoroethylene material, the sectional tool of described seal ring chuck has the straight base side forming outer round surface, described base side extends and is respectively adjacent to two ends and perpendicular to the containing limit of base side, described base side and two contains the metal energy storage spring in the C tee section annular groove interior clamping open circles cross section that limit is formed, described metal energy storage spring is made up of the spring band be wrapped in outside the metal-rubber circle of circular section, and described two contain limit certainly
The opening of seal ring chuck is towards high-pressure medium side, interior spacing under the right state of metal of metal energy storage spring is held and metal energy storage spring diameter ratio is 0.7-0.9 after pressurized, the length of the maximum olo that described two containing limit clamping metal energy storage spring back brace spread become and base side is 1.1-1.3 with the ratio of the seal groove degree of depth treating setting-in, and the metal material in described metal-rubber circle is identical with metal energy storage spring material.
Modification pctfe plastic (referring to the Chinese patent literature that application number is 201410176544.3) is a kind of desirable low-temperature resistant plastic, can-196 DEG C of--269 DEG C of scopes do not occur sclerosis and aging, keep good elasticity.Metal energy storage spring should adopt under ultra-low temperature surroundings (-196 DEG C--269 DEG C) to have the nickel-base alloy manufacture of good plasticity, toughness, corrosion resistance and higher-strength.Metal-rubber is discharged in order in a mold by the helical metal wire opened that stretches, and with the homogeneous elasticity porous mass that cold stamping method is shaping, both had the characteristic that selected metal is intrinsic, and had again the elasticity as rubber.Metal-rubber circle of the present invention adopts the nickel-base alloy silk of material identical with metal energy storage spring.
Composite sealing ring of the present invention be arranged on sealing surface in setting-in seal groove time, rubber ring cross section is ellipticity, there is good support and expand elasticity, make seal ring chuck under pressure medium and inner support expand flexible double action, kept fitting reliably with sealing surface, and the maximum olo that the two ends of its base side and two containing limits are formed and sealing surface are fitted respectively, form the two seals structure realized by seal ring chuck natural resiliency and inner support elasticity.Metal energy storage spring not only organically combines mutually with metal-rubber circle, and himself around spring structure good springiness, energy storage capability is strong, also plays certain protective action to the metal-rubber circle of its inner core.In addition the selecting properly of each component material, the seal pressure that under the present invention is properly settled low-temperature condition, nonmetallic material and metallic material expansion coefficient difference cause seriously reduces problem, and material hard crisp problem at cryogenic temperature, conscientiously can meet the reliable sealing of-196 DEG C of--269 DEG C of ultra-low temperature surroundings lower valves.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation of a preferred embodiment of the invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation of metal energy storage spring in Fig. 1 embodiment.
Fig. 4 is the using state schematic diagram of Fig. 1 embodiment.
Embodiment
Embodiment one
The present embodiment is used for the composite sealing ring of Subzero valve as shown in Figure 1, Figure 2, Figure 3 shows, comprise the seal ring chuck 1 of modification polychlorotrifluoroethylene material, the sectional tool of seal ring chuck 1 has the straight base side 1-1 forming outer round surface, and this base side 1-1 extends and is respectively adjacent to two ends and perpendicular to the containing limit 1-2 of base side 1-1.Base side 1-1 and two contains the metal energy storage spring 2 in the C tee section annular groove interior clamping open circles cross section that limit 1-2 is formed, and this metal energy storage spring 2 is made up of the spring band be wrapped in outside circular section metal-rubber circle 3.The two interior spacing T contained under the 1-2 nature of limit are 0.8 (can select in 0.7--0.9 scope as required) with the ratio of metal energy storage spring 2 cross-section hollow circular diameter D, the two maximum olo S containing limit 1-2 clamping metal energy storage spring 2 back brace spread one-tenth are 1.2 with the ratio of the seal groove degree of depth Z treating setting-in, length L and the ratio of the seal groove degree of depth Z treating setting-in of base side are 1.25 (all can select in 1.1-1.3 scope as one sees fit), and to be less than base side length L with the ratio of the seal groove degree of depth Z treating setting-in with maximum olo S with the ratio of the seal groove degree of depth Z treating setting-in be good.Metal material in metal-rubber circle 3 is identical with metal energy storage spring material, all adopts nickel-base alloy.
Research and experiment show, energy storage spring maximum diameter
with the ratio of its cross-section hollow circular diameter D be 35-45 be advisable (25 ~ 60 scopes also can), the ratio of the Spring Steel Band width A that pitch B and the coiling energy storage spring of energy storage spring coiling adopt is that 0.8 ~ 1.2 (see Fig. 2) is advisable, and concrete numerical value sets according to the usage requirement of valve.
During manufacture, modification polychlorotrifluoroethylene raw material is molded into the circular material blank of required form, in fixture, becomes seal ring chuck through precision turning aft-loaded airfoil.The nickel-base alloy filament winding of predetermined diameter is made helical coil, makes corresponding blank, then put into press tool cold-press moulding, make metal-rubber circle.Employing instrument, is wound around metal energy storage spring outside metal-rubber circle, makes the energy-accumulating element that metal-rubber and metal energy storage spring combine.Finally load in seal ring chuck with the energy-accumulating element of frock by metal-rubber and the combination of metal energy storage spring, just made Cryogenic valve composite sealing ring.
During assembling, as shown in Figure 4, the Cryogenic valve composite sealing ring of the present embodiment is embedded in the setting-in seal groove of valve flanges seal face, the opening of seal ring chuck is towards high-pressure medium side, metal energy storage spring after pressurized and metal-rubber circle are ellipticity, the containing limit of seal ring chuck is curved, under pressure medium and inner support expand flexible double action, keep reliably fitting with sealing surface, the maximum olo that the two ends of its base side and containing limit are formed and sealing surface are at a1, a2 two place fits respectively, form the two seals structure realized by seal ring chuck natural resiliency and inner support elasticity.Metal energy storage spring energy storage capability is strong, plays a protective role to metal-rubber circle.
Be summed up, the present embodiment has following remarkable advantage:
1. seal ring chuck adopts modification polychlorotrifluoroethylene sealing material, still has good elasticity under condition of ultralow temperature, can not be hardening and become fragile, and ensure that the high reliability of sealing.
2. metal energy storage spring and metal-rubber all adopt the nickel-base alloy under ultra-low temperature surroundings with good plasticity, toughness, corrosion resistance and higher intensity to make, physical and mechanical properties is stablized, not easily there is brittle fracture, stress corrosion fracture and stress relaxation, ensure that the high reliability of sealing.
3. compared with single energy storage spring, metal-rubber and metal energy storage spring combined energy-accumulation element have larger energy storage capability, can produce larger pressure, can keep good sealing effect for a long time in sealing surface contact area.
4. relatively single spring or metal-rubber are as elastomeric seal ring, metal-rubber and metal energy storage spring combined energy-accumulation element are that sealing provides double shield, even if especially when outer layer metal spring generation brittle failure or stress relaxation, metal-rubber still can provide good elastic support effect, guarantees the high reliability sealed.
5. metal-rubber and metal energy storage spring combined energy-accumulation element are compared with single rubber elastomer, and its elasticity can control as required, ensure that flexibility and the adaptability of design.
Claims (5)
1. the composite sealing ring for Subzero valve, comprise the seal ring chuck of modification polychlorotrifluoroethylene material, the sectional tool of described seal ring chuck has the straight base side forming outer round surface, described base side extends and is respectively adjacent to two ends and perpendicular to the containing limit of base side, described base side and two contains the metal energy storage spring in the C tee section annular groove interior clamping open circles cross section that limit is formed, described metal energy storage spring is made up of the spring band be wrapped in outside the metal-rubber circle of circular section, interior spacing under described two containing limit natures and metal energy storage spring diameter ratio are 0.7-0.9, the length of the maximum olo that described two containing limit clamping metal energy storage spring back brace spread become and base side is 1.1-1.3 with the ratio of the seal groove degree of depth treating setting-in, metal material in described metal-rubber circle is identical with metal energy storage spring material.
2. the composite sealing ring for Subzero valve according to claim 1, is characterized in that: described maximum olo and the ratio of the seal groove degree of depth treating setting-in are less than described base side length and the ratio of the seal groove degree of depth treating setting-in.
3. the composite sealing ring for Subzero valve according to claim 2, is characterized in that: the metal material in described metal-rubber circle is identical with metal energy storage spring material, all adopts nickel-base alloy.
4. the composite sealing ring for Subzero valve according to claim 3, is characterized in that: described energy storage spring maximum diameter is 35-45 with the ratio of its cross-section hollow circular diameter.
5. the composite sealing ring for Subzero valve according to claim 4, is characterized in that: the ratio of the Spring Steel Band width that pitch and the coiling energy storage spring of described energy storage spring coiling adopt is 0.8 ~ 1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476700.8A CN104265892A (en) | 2014-09-17 | 2014-09-17 | Composite sealing ring for low-temperature valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476700.8A CN104265892A (en) | 2014-09-17 | 2014-09-17 | Composite sealing ring for low-temperature valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265892A true CN104265892A (en) | 2015-01-07 |
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ID=52157446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410476700.8A Pending CN104265892A (en) | 2014-09-17 | 2014-09-17 | Composite sealing ring for low-temperature valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN104265892A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508607A (en) * | 2016-01-29 | 2016-04-20 | 江苏亿阀集团有限公司 | Manufacturing method of lip-type seal ring and special tool set |
| CN108131517A (en) * | 2016-12-01 | 2018-06-08 | 中核苏阀科技实业股份有限公司 | A kind of flange sealing structure for being suitable for bearing external and internal pressure simultaneously |
| CN110541940A (en) * | 2019-08-23 | 2019-12-06 | 江苏亿阀股份有限公司 | Pneumatic regulating valve with double-layer composite sealing ring |
| CN111224127A (en) * | 2020-01-15 | 2020-06-02 | 同济大学 | Fuel cell stack sealing structure and stress relaxation compensation method |
| CN111673954A (en) * | 2020-06-18 | 2020-09-18 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
| CN112879566A (en) * | 2021-01-13 | 2021-06-01 | 西安近代化学研究所 | Radial sealing device for compensating insufficient elasticity of material by improving resilience capability of structure |
| TWI820220B (en) * | 2018-10-10 | 2023-11-01 | 日商華爾卡股份有限公司 | Metal gasket |
| CN117145962A (en) * | 2023-10-30 | 2023-12-01 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
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| DE2440698A1 (en) * | 1973-08-27 | 1975-03-13 | Juha Antti Elia Nelimarkka | Sealing ring in P.T.F.E. for butterfly valve - with internal ring spring, suitable for high temperature |
| CN2818909Y (en) * | 2005-09-15 | 2006-09-20 | 沈阳鸿翔复合弹性设备有限公司 | Composite elastic shock-isolated component |
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| CN102644686A (en) * | 2012-04-09 | 2012-08-22 | 北京航空航天大学 | Method for manufacturing damping structural piece of aviation engine supporting system |
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| CN202719176U (en) * | 2012-08-02 | 2013-02-06 | 苏州工业园区思达德阀门有限公司 | Ball valve with elastic energy storage seal structure |
| CN203114177U (en) * | 2012-09-29 | 2013-08-07 | 宝鸡石油机械有限责任公司 | Roller bit of elastic energy storage bearing sealing structure |
| CN203130751U (en) * | 2013-02-25 | 2013-08-14 | 中国石油化工股份有限公司 | Disc spring metal rubber composite buffering anti-looseness part |
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| CN203374865U (en) * | 2013-07-09 | 2014-01-01 | 苏州工业园区思达德阀门有限公司 | Combined seal low-temperature float ball valve |
| CN103644309A (en) * | 2013-11-20 | 2014-03-19 | 江苏亿阀集团有限公司 | Low temperature resistant butterfly valve |
| CN103791096A (en) * | 2014-02-27 | 2014-05-14 | 北京裕泰行新材料科技有限公司 | Seal ring |
| CN203627892U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Soft seal valve seat of ultra-low-temperature fixed ball valve |
-
2014
- 2014-09-17 CN CN201410476700.8A patent/CN104265892A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2440698A1 (en) * | 1973-08-27 | 1975-03-13 | Juha Antti Elia Nelimarkka | Sealing ring in P.T.F.E. for butterfly valve - with internal ring spring, suitable for high temperature |
| CN2818909Y (en) * | 2005-09-15 | 2006-09-20 | 沈阳鸿翔复合弹性设备有限公司 | Composite elastic shock-isolated component |
| CN102606075A (en) * | 2012-03-30 | 2012-07-25 | 幸发芬 | Energy-storage bearing seal ring for cone bit |
| CN102644686A (en) * | 2012-04-09 | 2012-08-22 | 北京航空航天大学 | Method for manufacturing damping structural piece of aviation engine supporting system |
| CN102747962A (en) * | 2012-07-24 | 2012-10-24 | 天津立林钻头有限公司 | High-sealing roller bit |
| CN202719176U (en) * | 2012-08-02 | 2013-02-06 | 苏州工业园区思达德阀门有限公司 | Ball valve with elastic energy storage seal structure |
| CN203114177U (en) * | 2012-09-29 | 2013-08-07 | 宝鸡石油机械有限责任公司 | Roller bit of elastic energy storage bearing sealing structure |
| CN203130751U (en) * | 2013-02-25 | 2013-08-14 | 中国石油化工股份有限公司 | Disc spring metal rubber composite buffering anti-looseness part |
| CN203202226U (en) * | 2013-04-10 | 2013-09-18 | 哈尔滨耦合动力工程技术中心有限公司 | Elastic sealing ring for metal rubber |
| CN203374865U (en) * | 2013-07-09 | 2014-01-01 | 苏州工业园区思达德阀门有限公司 | Combined seal low-temperature float ball valve |
| CN103644309A (en) * | 2013-11-20 | 2014-03-19 | 江苏亿阀集团有限公司 | Low temperature resistant butterfly valve |
| CN203627892U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Soft seal valve seat of ultra-low-temperature fixed ball valve |
| CN103791096A (en) * | 2014-02-27 | 2014-05-14 | 北京裕泰行新材料科技有限公司 | Seal ring |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508607A (en) * | 2016-01-29 | 2016-04-20 | 江苏亿阀集团有限公司 | Manufacturing method of lip-type seal ring and special tool set |
| CN108131517A (en) * | 2016-12-01 | 2018-06-08 | 中核苏阀科技实业股份有限公司 | A kind of flange sealing structure for being suitable for bearing external and internal pressure simultaneously |
| TWI820220B (en) * | 2018-10-10 | 2023-11-01 | 日商華爾卡股份有限公司 | Metal gasket |
| CN110541940A (en) * | 2019-08-23 | 2019-12-06 | 江苏亿阀股份有限公司 | Pneumatic regulating valve with double-layer composite sealing ring |
| CN110541940B (en) * | 2019-08-23 | 2021-04-02 | 江苏亿阀股份有限公司 | Pneumatic regulating valve with double-layer composite sealing ring |
| CN111224127A (en) * | 2020-01-15 | 2020-06-02 | 同济大学 | Fuel cell stack sealing structure and stress relaxation compensation method |
| CN111673954A (en) * | 2020-06-18 | 2020-09-18 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
| CN111673954B (en) * | 2020-06-18 | 2022-12-16 | 北京通嘉鼎元科技有限公司 | Machining method of sealing element, sealing element and vacuum pump |
| CN112879566A (en) * | 2021-01-13 | 2021-06-01 | 西安近代化学研究所 | Radial sealing device for compensating insufficient elasticity of material by improving resilience capability of structure |
| CN117145962A (en) * | 2023-10-30 | 2023-12-01 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
| CN117145962B (en) * | 2023-10-30 | 2024-01-09 | 沈阳精航科技有限公司 | Method for improving deformation elasticity of fluid seal C-shaped sealing ring |
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