CN105134956A - Axial dynamic seal structure - Google Patents
Axial dynamic seal structure Download PDFInfo
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- CN105134956A CN105134956A CN201510603323.4A CN201510603323A CN105134956A CN 105134956 A CN105134956 A CN 105134956A CN 201510603323 A CN201510603323 A CN 201510603323A CN 105134956 A CN105134956 A CN 105134956A
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- seal groove
- seal
- section structure
- annular
- cut
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Abstract
Th invention provides an axial dynamic seal structure which comprises a seal ring, a seal groove front section structure and a seal groove rear section structure. The seal groove front section structure is coaxially and fixedly connected with the seal groove rear section structure, and an annular seal groove is formed by the matched end faces of the seal groove front section structure and the seal groove rear section structure; the section of the annular seal groove is shaped like a Chinese character 'tu', and an outer opening of the annular seal groove is smaller than an inner cavity of the annular seam groove; the seal ring is installed in the annular seal groove in a pressed mode, and the seal ring is extruded from the outer opening of the annular seal groove. According to the axial dynamic seal structure, the seal structure of the seal groove is optimized, an O-shaped ring is protected, twist tearing of the O-shaped ring caused when the O-shaped ring passes through pit obstacles in the axial moving process is avoided, and the reliability of sealing is achieved.
Description
Technical field
The present invention relates to technical field of sealing technology, be specially a kind of axial movable sealing structure.
Background technique
Rubber o-ring (hereinafter referred to as O type circle) is a kind of cross section is circular rubber ring, is most popular a kind of Sealing in hydraulic and pneumatic transmission system.Its structure is simple, mounting or dismounting are convenient, with low cost, is widely used, namely can be used for standstill seal, also can be used for reciprocal axial seal.But when the shortcoming of O type circle is for motive sealing, in axial motive sealing running, particularly experience the such obstacle of pit, be very easy to cause distortion to tear, cause seal failure.In actual product design, be limited by structural requirement, axial motive sealing runs in way often exists the such structure of similar pit, as shown in Figure 1, during initialization, medium enters from A mouth, flow out from B mouth, cut-off piston is failure to actuate, when wanting power cut-off, as shown in Figure 2, cut-off piston produces axial displacement in the housing, O type circle on cut-off piston, through pit obstacle, enters cut-off chamber, blocks the medium going to B mouth from A mouth.Ended piston in the past and adopt overall structure, O type circle is arranged in groove, as shown in Figure 3, is very easy to distortion tears through pit obstacle O type circle.So in order to avoid seal failure in O type circle running, must a solution be proposed.
Summary of the invention
For solving prior art Problems existing, the present invention proposes a kind of axial movable sealing structure, cut-off piston structure is changed into split type-cut-off piston crown, cut-off piston tail, O type circle by integral type, as shown in Figure 4, Figure 5, at cut-off piston crown and cut-off piston tail joint, " convex " type groove is set, be fitted in by O type circle in " convex " type groove during assembling, O type circle is extruded from cut-off piston crown and afterbody " convex " type groove seam, is formed seal with housing piston hole.Namely such structure achieves reliable sealing, protects O type circle simultaneously, is distorted and tears when avoiding O type circle to experience pit obstacle in axial movement.
Technological scheme of the present invention is:
The axial movable sealing structure of described one, is characterized in that: comprise seal ring, seal groove front segment structure and seal groove rear section structure; Seal groove front segment structure is coaxially fixedly connected with seal groove rear section structure, and the counterface of seal groove front segment structure and seal groove rear section structure forms annular seal groove; The section shape of described annular seal groove is " convex " word shape that outer young inner chamber is large; Described seal ring is fitted in annular seal groove, and seal ring is extruded from annular seal groove collar extension.
Beneficial effect
By optimizing seal groove sealing configuration, there is damage when avoiding seal ring experience pit, achieving reliable sealing in the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 initial position operating diagram.
Fig. 2 end position operating diagram.
Fig. 3 old structure cut-off piston schematic diagram.
Fig. 4 modified node method cut-off piston schematic diagram.
Fig. 5 modified node method sealing close-up schematic view.
In figure: 1. housing 2. ends piston rear 3.O RunddichtringO 4. and ends piston head section 5. old structure cut-off piston
A: working medium inlet B: working medium exit port.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
As shown in Figure 1, during initialization, medium enters from A mouth, flows out from B mouth, cut-off piston is failure to actuate, and when wanting power cut-off, as shown in Figure 2, cut-off piston produces axial displacement in the housing, O type circle on cut-off piston, through pit obstacle, enters cut-off chamber, blocks the medium going to B mouth from A mouth.Ended piston in the past and adopt overall structure, O type circle is arranged in groove, as shown in Figure 3, is very easy to distortion tears through pit obstacle O type circle.
So the present embodiment is optimized sealing configuration structure, cut-off piston structure is changed into split type by integral type: cut-off piston crown, cut-off piston tail.Cut-off piston crown, cut-off piston tail coaxial threaded are fixedly connected with, and as shown in Figure 4, Figure 5, form annular seal groove at cut-off piston crown and cut-off piston tail counterface; The section shape of described annular seal groove is " convex " word shape that outer young inner chamber is large; Be fitted in by O type circle in " convex " type groove during assembling, O type circle is extruded from cut-off piston crown and afterbody " convex " type groove seam, is formed seal with housing piston hole.Such structural defence O type circle, changes the stress of O type circle, is distorted and tears, achieve reliable sealing when avoiding O type circle to experience pit obstacle in axial movement.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (1)
1. an axial movable sealing structure, is characterized in that: comprise seal ring, seal groove front segment structure and seal groove rear section structure; Seal groove front segment structure is coaxially fixedly connected with seal groove rear section structure, and the counterface of seal groove front segment structure and seal groove rear section structure forms annular seal groove; The section shape of described annular seal groove is " convex " word shape that outer young inner chamber is large; Described seal ring is fitted in annular seal groove, and seal ring is extruded from annular seal groove collar extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510603323.4A CN105134956A (en) | 2015-09-21 | 2015-09-21 | Axial dynamic seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510603323.4A CN105134956A (en) | 2015-09-21 | 2015-09-21 | Axial dynamic seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105134956A true CN105134956A (en) | 2015-12-09 |
Family
ID=54720430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510603323.4A Pending CN105134956A (en) | 2015-09-21 | 2015-09-21 | Axial dynamic seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105134956A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065515A (en) * | 1991-03-31 | 1992-10-21 | 朱金芳 | Inner pressuring sealing method and valve inner pressuring sealing structure thereof |
| CN1317656A (en) * | 2000-04-10 | 2001-10-17 | 赫尔比格压缩机技术服务有限公司 | Sealing ring type filling device |
| JP2002161983A (en) * | 2000-11-24 | 2002-06-07 | Nok Corp | Sealing device |
| JP2002174347A (en) * | 2000-12-07 | 2002-06-21 | Osuka Engineering:Kk | Seal device for shaft |
| CN201606177U (en) * | 2009-10-23 | 2010-10-13 | 浙江双富电力设备有限公司 | Sealing device of end surface of guide vane |
| CN202138533U (en) * | 2011-05-25 | 2012-02-08 | 张潮宏 | Oiling head and tail sealing device for tailshaft of ship |
| CN202228678U (en) * | 2011-09-27 | 2012-05-23 | 吉天师动力科技(上海)有限公司 | Three-dimensional movement sealing device for push rod of combustion furnace |
| CN102517959A (en) * | 2012-01-10 | 2012-06-27 | 山东昌华造纸机械有限公司 | Sealing device of boot type squeezing device |
| CN203272793U (en) * | 2013-05-07 | 2013-11-06 | 宝鸡石油机械有限责任公司 | P-type seal ring for hydraulic shaft |
| CN103470764A (en) * | 2013-09-17 | 2013-12-25 | 常州液压成套设备厂有限公司 | Oil cylinder easy for adjusting compression amount of sealing ring |
-
2015
- 2015-09-21 CN CN201510603323.4A patent/CN105134956A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065515A (en) * | 1991-03-31 | 1992-10-21 | 朱金芳 | Inner pressuring sealing method and valve inner pressuring sealing structure thereof |
| CN1317656A (en) * | 2000-04-10 | 2001-10-17 | 赫尔比格压缩机技术服务有限公司 | Sealing ring type filling device |
| JP2002161983A (en) * | 2000-11-24 | 2002-06-07 | Nok Corp | Sealing device |
| JP2002174347A (en) * | 2000-12-07 | 2002-06-21 | Osuka Engineering:Kk | Seal device for shaft |
| CN201606177U (en) * | 2009-10-23 | 2010-10-13 | 浙江双富电力设备有限公司 | Sealing device of end surface of guide vane |
| CN202138533U (en) * | 2011-05-25 | 2012-02-08 | 张潮宏 | Oiling head and tail sealing device for tailshaft of ship |
| CN202228678U (en) * | 2011-09-27 | 2012-05-23 | 吉天师动力科技(上海)有限公司 | Three-dimensional movement sealing device for push rod of combustion furnace |
| CN102517959A (en) * | 2012-01-10 | 2012-06-27 | 山东昌华造纸机械有限公司 | Sealing device of boot type squeezing device |
| CN203272793U (en) * | 2013-05-07 | 2013-11-06 | 宝鸡石油机械有限责任公司 | P-type seal ring for hydraulic shaft |
| CN103470764A (en) * | 2013-09-17 | 2013-12-25 | 常州液压成套设备厂有限公司 | Oil cylinder easy for adjusting compression amount of sealing ring |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151209 |
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| WD01 | Invention patent application deemed withdrawn after publication |