CN103216644B - Check valve sealing structure - Google Patents
Check valve sealing structure Download PDFInfo
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- CN103216644B CN103216644B CN201310108721.XA CN201310108721A CN103216644B CN 103216644 B CN103216644 B CN 103216644B CN 201310108721 A CN201310108721 A CN 201310108721A CN 103216644 B CN103216644 B CN 103216644B
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- sealing
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- valve body
- sealing structure
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Abstract
The invention discloses a check valve sealing structure which adopts a structural form of a nonmetal cylindrical head sealing piece for a metal inner spherical valve body, wherein sharp corners of the nonmetal cylindrical head sealing piece are used for containing with the nonmetal inner spherical surface, so that sealing specific pressure is extremely giant, and sensitivity of the sealing performances to the surface crudeness, scratches and form and location tolerance of the sealing surface are greatly weakened; meanwhile, when the axis of the metal valve body and the axis of the nonmetal sealing piece are not on the same line or form a certain angle due to the large fit clearance of the valve body and the nonmetal sealing piece, the sealing structure also can be well adapted; regardless of the angle difference between the axes, the intersection line of the sealing plane and the metal inner spherical surface is always a circle, so that the sealing surface can be completely adhered all the time, and the reliable sealing is ensured. Therefore, the check valve sealing structure disclosed by the invention can be adopted for reducing the form and location tolerance of the components as well as the fitting requirements of the components, and greatly reducing the machining difficulty and assembling difficulty of the sealing piece; meanwhile, the reliable sealing can be realized.
Description
Technical field
The present invention relates to a kind of sealing structure of one-way valve, under particularly relating to a kind of low sealing force, realize the sealing configuration of pole less leakage rate, be mainly used in the reliable oppositely sealing that double elements satellite propulsion system realizes one-way valve under low sealing force.
Background technique
One-way valve is used for double elements satellite propulsion system, the satellite transfer orbit stage to oxygen, fire two tanks helium be provided, make tank in running order, to ensure that motor is by specified proportions of ingredients work, anti-block, the propellant agent steam fired in two tanks oppositely flow backwards simultaneously.The pressure drop of one-way valve forward work is as far as possible little, and guarantee is simultaneously reverse sealability preferably, and this just requires that, sealing force large at valve port diameter is little, ensure reliable, good sealability, this is difficult point very large in one-way valve designs.Traditional one-way valve generally adopts the metal conical surface shown in Fig. 1 to the sealing configuration of nonmetal sphere, metal valve body 1 and nonmetal spool 2 surface of contact adopt the conical surface, and nonmetal spool 2 adopts spheric structure, and this structure is under the effect of sealing force, there is certain adjustment centering ability, contribute to sealing.But when sealing force is very little, because sealing surface is wider, seal pressure is less; Meanwhile, sealing surface is wider also by comparatively large for the resistance causing adjusting, and centering is limited in one's ability.Therefore, reach good sealing effect, high to the surface quality of sealing surface, Geometrical Tolerance Principle, the difficulty of processing of Sealing and the assembling difficulty of valve are all very large, and the sealing up-to-standard rate of product is not high, and manufacturing efficiency is low.
Summary of the invention
The technical problem that the present invention solves is: overcome the deficiencies in the prior art, a kind of sealing structure of one-way valve is provided, under less sealing force, greatly improve the seal pressure of sealing pair, simultaneously under different assembling conditions, without the need to adjusting sealing surface position, just can reach good sealing state, the difficulty of processing of Sealing, assembling difficulty have and significantly reduce.
Technological scheme of the present invention is: a kind of sealing structure of one-way valve, comprise the spool and valve body that are made up of non-metallic seal, supporting element, valve body is processed into inner ball surface with the spool place of matching, non-metallic seal is designed to "T"-shaped cylindrical body, is provided with the inner ball surface held down assembly for "-" shape cylindrical body of non-metallic seal being pressed on valve body between " U " shape supporting element and valve body.Non-metallic seal adopts plastics.
The present invention's beneficial effect is compared with prior art: the present invention adopts metal inner ball surface valve body to the structural type of nonmetal socket cap Sealing, the wedge angle of nonmetal socket cap Sealing is to the contact of metal inner ball surface, seal pressure is made to become very big, so the receptance of sealability to the roughness of sealing surface, cut and form and position tolerance will weaken greatly; Simultaneously, when the matching gap of valve body and non-metallic seal is larger, make the axis of the axis of metal valve body and non-metallic seal not on one wire or angled time, sealing structure also can well adapt to, no matter because this two axial lines differs angle, the intersection of sealing plane and metal inner ball surface is a circle all the time, and sealing surface can be fitted completely, ensures reliable sealing.Visible, adopt sealing configuration of the present invention, require to reduce to the form and position tolerance of spare part and the cooperation between them, the difficulty of processing of Sealing, assembling difficulty have and significantly reduce, and can realize reliable sealing again simultaneously.
Accompanying drawing explanation
Fig. 1 is traditional sealing structure of one-way valve figure;
Fig. 2 is the sealing structure of one-way valve figure after improving;
Fig. 3 is the one-way valve body structure figure after improving.
Embodiment
Below in conjunction with the drawings and specific embodiments, further detailed description is done to the present invention:
In order to solve the problem realizing pole less leakage rate under low sealing force, concrete solution as shown in Figure 2, the present invention includes the spool and valve body 1 that are made up of non-metallic seal 2, supporting element 3, valve body 1 is processed into inner ball surface with the spool place of matching, as shown in Figure 3, non-metallic seal 2 is designed to "T"-shaped cylindrical body, " U " shape supporting element 3 is enclosed within " | " shape cylindrical body of non-metallic seal 2, is provided with the inner ball surface held down assembly for "-" shape cylindrical body of non-metallic seal 2 being pressed on valve body 1 between " U " shape supporting element 3 and valve body 1.
Because seal pressure is directly proportional to sealing force, be inversely proportional to the area of sealing surface.According to the requirement of one-way valve performance, make sealing force minimum, can not increase again, product valve port diameter is enough large simultaneously, therefore will increase seal pressure, only have the width reducing sealing surface.Adopt the sealing configuration of Fig. 2, the inner ball surface of metal directly contacts with nonmetallic sharp edge, reduces seal f ace width greatly, increases seal pressure to greatest extent.And when the matching gap of spare part is comparatively large or form and position tolerance is larger, adopt the inner ball surface of this patent to the sealing pair of socket cap, no matter the axis of metal valve body entrance and the axis of non-metallic seal differ angle (under different assembling conditions), the intersection of sealing plane and metal inner ball surface is a circle all the time, sealing surface can be fitted completely, ensure reliable sealing, thus strengthen the adaptability of sealing configuration to form and position tolerance and different assembling condition.
Adopt sealing configuration of the present invention, under less sealing force (about 6N), and when valve port diameter comparatively large (about 12mm), good sealability can be realized.Under the 0.035MPa that oppositely pressurizes, leak rate level is better than 1 × 10
-2paL/s.Meanwhile, sealing structure has generality, nonmetally also can adopt the plastics that hardness is larger, can be applied to other kinds valve, realize highly reliable sealability.The present invention has been successfully used in the one-way valve of double elements satellite booster subsystem.
The content be not described in detail in specification belongs to the known technology of professional and technical personnel in the field.
Claims (2)
1. a sealing structure of one-way valve, it is characterized in that: comprise the spool and valve body (1) that are made up of non-metallic seal (2), supporting element (3), valve body (1) is processed into inner ball surface with the spool place of matching, non-metallic seal (2) is designed to "T"-shaped cylindrical body, is provided with the inner ball surface held down assembly for "-" shape cylindrical body of non-metallic seal (2) being pressed on valve body (1) between " U " shape supporting element (3) and valve body (1).
2. a kind of sealing structure of one-way valve according to claim 1, is characterized in that: described non-metallic seal (2) adopts plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108721.XA CN103216644B (en) | 2013-03-29 | 2013-03-29 | Check valve sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310108721.XA CN103216644B (en) | 2013-03-29 | 2013-03-29 | Check valve sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103216644A CN103216644A (en) | 2013-07-24 |
| CN103216644B true CN103216644B (en) | 2015-04-22 |
Family
ID=48814694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310108721.XA Active CN103216644B (en) | 2013-03-29 | 2013-03-29 | Check valve sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103216644B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3920893A1 (en) * | 1989-06-26 | 1991-01-10 | Bayerische Motoren Werke Ag | Magnetic valve for heating medium flow of vehicle - provides linear flow with valve and seat supported at housing across pressure spring |
| CN2910576Y (en) * | 2006-04-28 | 2007-06-13 | 珠海天威技术开发有限公司 | Ink cartridge of ink-jet printer and its one-way valve |
| CN202300625U (en) * | 2011-10-25 | 2012-07-04 | 北汽福田汽车股份有限公司 | One-way valve and car engine cooling system as well as car |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100430786B1 (en) * | 2002-03-22 | 2004-05-17 | 손형모 | A check valve |
| US8448659B2 (en) * | 2011-03-07 | 2013-05-28 | Halliburton Energy Services, Inc. | Check valve assembly for well stimulation operations |
-
2013
- 2013-03-29 CN CN201310108721.XA patent/CN103216644B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3920893A1 (en) * | 1989-06-26 | 1991-01-10 | Bayerische Motoren Werke Ag | Magnetic valve for heating medium flow of vehicle - provides linear flow with valve and seat supported at housing across pressure spring |
| CN2910576Y (en) * | 2006-04-28 | 2007-06-13 | 珠海天威技术开发有限公司 | Ink cartridge of ink-jet printer and its one-way valve |
| CN202300625U (en) * | 2011-10-25 | 2012-07-04 | 北汽福田汽车股份有限公司 | One-way valve and car engine cooling system as well as car |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103216644A (en) | 2013-07-24 |
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