WO2014126243A1 - 密封構造 - Google Patents
密封構造 Download PDFInfo
- Publication number
- WO2014126243A1 WO2014126243A1 PCT/JP2014/053658 JP2014053658W WO2014126243A1 WO 2014126243 A1 WO2014126243 A1 WO 2014126243A1 JP 2014053658 W JP2014053658 W JP 2014053658W WO 2014126243 A1 WO2014126243 A1 WO 2014126243A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- mounting hole
- injector
- peripheral surface
- sealing structure
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
Definitions
- the present invention relates to a sealing structure that prevents high pressure gas from leaking.
- a sealing device is provided to prevent high pressure combustion gas from leaking from the annular gap between the injector and the mounting hole formed in the cylinder head. It is done. Moreover, the sealing device is similarly provided also in the site
- a sealing device there is known a technology employing a resin seal ring which has a small number of parts and can suppress noise due to vibration as compared to the case of using a washer made of metal. (See Patent Document 1).
- An object of the present invention is to provide a sealing structure capable of exhibiting a sealing function even in a low temperature state with a reduction in the clearance of a seal ring.
- the present invention adopts the following means in order to solve the above problems.
- the sealing structure of the present invention is A member having a mounting hole and exposed to high pressure gas; A mounting part attached to the mounting hole; A seal ring made of resin which seals an annular gap between the mounting hole and the mounting part; A sealed structure comprising On the inner peripheral surface of the mounting hole, a step having a larger diameter is formed on the side where high pressure gas is present, The seal ring is mounted at a position in close contact with the step surface of the step.
- the seal is formed on the step surface of the step formed on the inner peripheral surface of the mounting hole. Since the ring is kept in close contact, high pressure gas leakage can be suppressed. Therefore, the crush margin of the seal ring decreases with time, and the diameter of the seal ring decreases due to the low temperature, so that a gap is generated between the outer peripheral surface of the seal ring and the inner peripheral surface of the mounting hole. , Sealing function is exhibited.
- the sealing function can be exhibited even in the low temperature state and in the state in which the crushing allowance of the seal ring is reduced.
- FIG. 1 is a schematic sectional view showing a mounting structure of an injector according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing an initial state in which the seal ring according to the embodiment of the present invention is mounted.
- FIG. 3 is a schematic cross-sectional view showing a mounting state of the seal ring according to the embodiment of the present invention, in which a crushing loss of the seal ring is reduced, and a low temperature state.
- FIG. 4 is a schematic cross-sectional view showing a mounted state of the seal ring according to the first modification of the present invention, in which a crushing loss of the seal ring is reduced, and a low temperature state.
- FIG. 5 is a schematic cross-sectional view showing a mounting state of a seal ring according to a second modification of the present invention, in which a crushing loss of the seal ring is reduced, and a low temperature state.
- the sealing structure according to the present invention is a structure for preventing leakage of high pressure gas such as combustion gas. More specifically, the sealing structure according to the present invention is a structure for sealing an annular gap between a mounting hole formed in a member exposed to high pressure gas and a mounting part mounted in the mounting hole.
- a sealing structure for sealing an annular gap between a mounting hole formed in a cylinder head as a member exposed to high pressure gas and an injector as a mounting part mounted in the mounting hole An example will be described.
- the present invention is also applicable to a sealing structure that seals an annular gap between a mounting hole formed in a cylinder head and various sensors (for example, combustion pressure sensors) mounted in the mounting hole. Further, the present invention is not limited to a cylinder head, but is applied to a sealing structure for sealing an annular gap between a mounting hole formed in a member exposed to high pressure gas and various mounting parts mounted in the mounting hole. It is possible.
- An injector mounting hole 310 is formed in a cylinder head 300 of the engine.
- the injector 200 is attached to the injector attachment hole 310 so that its tip portion is inserted.
- the lower side through the cylinder head 300 is the combustion chamber side (E)
- the upper side is the atmosphere side (A).
- an annular groove 210 is provided at the tip of the injector 200, and a seal ring (tip seal) is attached to the annular groove 210 to prevent the combustion gas from leaking to the atmosphere side (A) from the annular gap.
- a collar 220 is provided in the vicinity of the tip of the injector 200.
- FIG. 2 is a schematic sectional view showing an initial state in which the seal ring 100 according to the embodiment of the present invention is mounted.
- the cross-sectional view in FIG. 2 shows a part of the cross section cut along a plane including the central axis of the seal ring 100.
- the sealing structure according to the present embodiment has a rotationally symmetrical shape, and the same cross-sectional shape is formed in any plane including the central axis of the seal ring 100.
- the seal ring 100 is a cylindrical member made of a resin material (such as PTFE or a resin composition composed of PTFE and a filler) having heat resistance of at least 200 ° C. That is, the cross-sectional shape cut in the plane including the central axis in the seal ring 100 is rectangular. That is, the inner peripheral surface side of the seal ring 100 is formed by the cylindrical surface 110 in close contact with the groove bottom surface of the annular groove 210, and the outer peripheral surface side is by the cylindrical surface 120 in close contact with the inner peripheral surface of the injector mounting hole 310. It is configured. In addition, since the seal ring 100 is deformed according to the shape of the groove bottom surface of the annular groove 210 and the shape of the inner peripheral surface of the injector mounting hole 310 in the mounted state, as shown in FIG. It does not become.
- a resin material such as PTFE or a resin composition composed of PTFE and a filler
- seal ring 100 has a crushing margin at least in the initial state. Therefore, the cylindrical surface 110 on the inner peripheral surface side and the cylindrical surface 120 on the outer peripheral surface are in close contact with the groove bottom surface of the annular groove 210 and the inner peripheral surface of the injector mounting hole 310 in a state having sufficient surface pressure. ing.
- the groove bottom of the annular groove 210 of the injector 200 is formed by a cylindrical surface 211 at the combustion chamber side (E), and by a tapered surface 212 whose diameter increases toward the atmosphere side (A) at the atmosphere side (A). .
- the seal ring 100 is pressed toward the atmosphere side (A) by the pressure of the combustion gas and pressed against the tapered surface 212, so that the self-sealing function is exhibited.
- the combustion chamber side (E) is the large diameter portion 310a
- the atmosphere side (A) is the small diameter portion 310b
- the combustion chamber side (E) where high pressure gas is present is A step is formed in which the diameter increases.
- the stepped surface 310 c between the large diameter portion 310 a and the small diameter portion 310 b is perpendicular to the central axes of the seal ring 100 and the injector mounting hole 310 in design.
- the seal ring 100 is mounted so as to enter the small diameter portion 310 b side of the injector mounting hole 310.
- the outer peripheral surface side of the seal ring 100 is deformed so as to follow the inner peripheral surface of the injector mounting hole 310, so the outer peripheral surface of the seal ring 100 is also deformed so as to have a step.
- the stepped surface 120 a formed by such deformation adheres closely to the stepped surface 310 c between the large diameter portion 310 a and the small diameter portion 310 b in the inner peripheral surface of the injector mounting hole 310.
- FIG. 3 is a schematic cross-sectional view showing a mounted state of the seal ring 100 according to the embodiment of the present invention, in which the crushing allowance of the seal ring 100 is reduced, and a low temperature state.
- the inner peripheral surface side and the outer peripheral surface side are provided with a crushing allowance.
- the crushing margin will decrease with time.
- the diameter of the seal ring 100 is reduced, as shown in FIG. 3, between the outer peripheral surface of the seal ring 100 and the inner peripheral surface of the injector mounting hole 310. A gap S will occur between the two.
- the stepped surface 120a on the outer peripheral surface of the seal ring 100 is the stepped surface 310c between the large diameter portion 310a and the small diameter portion 310b on the inner peripheral surface of the injector mounting hole 310. It is kept in close contact with the Therefore, the sealing function is exhibited even when the gap S as described above is generated.
- the step surface 120a formed on the seal ring 100 is the inner peripheral surface of the injector mounting hole 310.
- the distal end surface 130 of the seal ring 100 may be in close contact with the step surface 310 c on the inner peripheral surface of the injector mounting hole 310.
- tip end surface 130 of seal ring 100 is the injector mounting hole.
- the inner peripheral surface of the injector mounting hole 310 is configured such that the combustion chamber side (E) is the large diameter portion 310a and the atmosphere side (A) is the small diameter portion 310b.
- the combustion chamber side (E) is the large diameter portion 310a and the atmosphere side (A) is the small diameter portion 310b.
- the combustion chamber side (E) on which the high pressure gas is present forms a step having a larger diameter.
- the surface on the combustion chamber side (E) of the projecting portion 320 is the stepped surface 320a.
- the stepped surface 320a may also be made perpendicular to the central axes of the seal ring 100 and the injector mounting hole 310 in design.
- the seal ring 100 is mounted so as to enter the projecting portion 320 side of the injector mounting hole 310, whereby the stepped surface 120a formed on the seal ring 100 is obtained.
- the distal end surface 130 of the seal ring 100 may be configured to be in close contact with the stepped surface 320a.
- the same components as those in the above-described embodiment are denoted by the same reference numerals.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gasket Seals (AREA)
- Fuel-Injection Apparatus (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
取付孔を有し、かつ高圧ガスに曝される部材と、
前記取付孔に取り付けられる取付部品と、
前記取付孔と前記取付部品との間の環状隙間を封止する樹脂製のシールリングと、
を備える密封構造であって、
前記取付孔の内周面には、高圧ガスが存在する側の方が、径が大きくなる段差が形成されており、
前記シールリングは、前記段差の段差面に対して密着する位置に装着されていることを特徴とする。
<インジェクターの取り付け構造>
本実施例に係る密封構造が適用されるインジェクターの取り付け構造について、図1を参照して説明する。なお、図1においては、説明の便宜上、シールリングは省略している。
図2を参照して、本発明の実施例に係る密封構造について説明する。図2は本発明の実施例に係るシールリング100の装着状態であって初期の状態を示す模式的断面図である。なお、図2における断面図は、シールリング100の中心軸線を含む面で切断した断面の一部を示している。なお、本実施例に係る密封構造は、回転対称形状であり、シールリング100の中心軸線を含むいずれの面においても、同一の断面形状をなしている。
本実施例に係る密封構造によれば、シールリング100の外周面とインジェクター取付孔310の内周面との間に隙間が生じた場合であっても、インジェクター取付孔310の内周面に形成された段差の段差面310cに対してシールリング100が密着した状態が保たれるため、高圧ガスの漏れを抑制できる。この点について、図3を参照して、より詳細に説明する。
上記実施例においては、シールリング100がインジェクター取付孔310のうち小径部310b側に入り込むように装着されることで、シールリング100に形成された段差面120aが、インジェクター取付孔310の内周面における段差面310cに対して密着する場合を示した。しかしながら、図4に示すように、シールリング100の先端面130がインジェクター取付孔310の内周面における段差面310cに対して密着するように構成してもよい。この場合においても、図4に示すように、シールリング100の外周面とインジェクター取付孔310の内周面との間に隙間Sが生じても、シールリング100の先端面130が、インジェクター取付孔310の段差面310cに対して密着した状態が維持される。したがって、上記のような隙間Sが生じた場合であっても、密封機能が発揮される。なお、図4においては、上記実施例で示した構成と同一の構成部分については同一の符号を付している。
上記実施例においては、インジェクター取付孔310の内周面は、燃焼室側(E)が大径部310a、大気側(A)が小径部310bとなるように構成されることで、高圧ガスが存在する燃焼室側(E)の方が、径が大きくなる段差が形成される場合を示した。しかしながら、図5に示すように、インジェクター取付孔310の内周面に環状の突出部320を設けることによって、高圧ガスが存在する燃焼室側(E)の方が、径が大きくなる段差を形成させることもできる。この場合においても、突出部320における燃焼室側(E)の面が段差面320aとなる。この段差面320aについても、設計上、シールリング100やインジェクター取付孔310の中心軸線に対して垂直となるようにすればよい。なお、図5においては、上記実施例の場合と同様に、シールリング100がインジェクター取付孔310のうち突出部320側に入り込むように装着されることで、シールリング100に形成された段差面120aが、突出部320における段差面320aに対して密着する場合を示している。しかしながら、上記変形例1の場合と同様に、シールリング100の先端面130が、この段差面320aに対して密着するように構成してもよい。なお、図5においては、上記実施例で示した構成と同一の構成部分については同一の符号を付している。
110 円柱面
120 円柱面
120a 段差面
130 先端面
200 インジェクター
210 環状溝
211 円柱面
212 テーパ面
220 つば
300 シリンダーヘッド
310 インジェクター取付孔
310a 大径部
310b 小径部
310c 段差面
320 突出部
320a 段差面
Claims (1)
- 取付孔を有し、かつ高圧ガスに曝される部材と、
前記取付孔に取り付けられる取付部品と、
前記取付孔と前記取付部品との間の環状隙間を封止する樹脂製のシールリングと、
を備える密封構造であって、
前記取付孔の内周面には、高圧ガスが存在する側の方が、径が大きくなる段差が形成されており、
前記シールリングは、前記段差の段差面に対して密着する位置に装着されていることを特徴とする密封構造。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14751385.7A EP2957795B1 (en) | 2013-02-18 | 2014-02-17 | Sealing structure |
JP2015500333A JP6036982B2 (ja) | 2013-02-18 | 2014-02-17 | 密封構造 |
KR1020157021260A KR101718270B1 (ko) | 2013-02-18 | 2014-02-17 | 밀봉구조 |
CN201480009243.XA CN105074297B (zh) | 2013-02-18 | 2014-02-17 | 密封结构 |
US14/766,354 US9664162B2 (en) | 2013-02-18 | 2014-02-17 | Sealing structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-028949 | 2013-02-18 | ||
JP2013028949 | 2013-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014126243A1 true WO2014126243A1 (ja) | 2014-08-21 |
Family
ID=51354241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/053658 WO2014126243A1 (ja) | 2013-02-18 | 2014-02-17 | 密封構造 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9664162B2 (ja) |
EP (1) | EP2957795B1 (ja) |
JP (1) | JP6036982B2 (ja) |
KR (1) | KR101718270B1 (ja) |
CN (1) | CN105074297B (ja) |
WO (1) | WO2014126243A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107262755A (zh) * | 2017-06-26 | 2017-10-20 | 江苏新光华机械有限公司 | 采用偏心调整镗孔尺寸刀具的安装结构 |
CN110886647A (zh) * | 2019-11-21 | 2020-03-17 | 重庆长安汽车股份有限公司 | 汽油机燃烧室及汽车 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10139133B2 (en) * | 2015-12-03 | 2018-11-27 | Heateflex Corporation | In-line heater |
JP7476827B2 (ja) * | 2021-03-12 | 2024-05-01 | トヨタ自動車株式会社 | 燃料噴射装置用制振インシュレータ |
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JP2002081548A (ja) | 2000-09-04 | 2002-03-22 | Honda Motor Co Ltd | シール構造 |
JP2006250360A (ja) * | 2000-04-20 | 2006-09-21 | Busak + Shamban Deutschland Gmbh | 封止装置 |
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SE379582B (ja) * | 1973-10-23 | 1975-10-13 | B T F Ekman | |
DE10027662A1 (de) * | 2000-06-03 | 2001-12-06 | Bosch Gmbh Robert | Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil |
DE10038300A1 (de) * | 2000-08-05 | 2002-02-14 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
JP4529321B2 (ja) * | 2000-10-13 | 2010-08-25 | Nok株式会社 | インジェクター用燃焼ガスシール |
US6938901B2 (en) * | 2000-12-26 | 2005-09-06 | Toyota Jidosha Kabushiki Kaisha | Combustion gas seal for injector and sealing structure with the combustion gas seal |
DE10393981T5 (de) * | 2002-12-27 | 2005-11-10 | Nok Corp. | Verbindervorrichtung |
JP4089577B2 (ja) | 2003-09-25 | 2008-05-28 | トヨタ自動車株式会社 | 筒内噴射用インジェクタ |
US7117851B2 (en) * | 2003-11-25 | 2006-10-10 | Toyota Jidosha Kabushiki Kaisha | Installation procedure and correction jig for a combustion gas seal for an injector |
CN2727423Y (zh) | 2004-09-15 | 2005-09-21 | 重庆宗申技术开发研究有限公司 | 摩托车发动机汽缸头密封结构 |
DE102006009094A1 (de) | 2006-02-28 | 2007-08-30 | Bayerische Motoren Werke Ag | Dämpfungseinrichtung und Dämpfungselement |
US7484499B2 (en) * | 2007-04-03 | 2009-02-03 | Gm Global Technology Operations, Inc. | Combustion seal |
EP2148082B1 (en) * | 2008-07-24 | 2011-10-19 | Continental Automotive GmbH | Coupling arrangement for an injection valve and injection valve |
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2014
- 2014-02-17 EP EP14751385.7A patent/EP2957795B1/en active Active
- 2014-02-17 US US14/766,354 patent/US9664162B2/en active Active
- 2014-02-17 WO PCT/JP2014/053658 patent/WO2014126243A1/ja active Application Filing
- 2014-02-17 KR KR1020157021260A patent/KR101718270B1/ko active IP Right Grant
- 2014-02-17 JP JP2015500333A patent/JP6036982B2/ja active Active
- 2014-02-17 CN CN201480009243.XA patent/CN105074297B/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006250360A (ja) * | 2000-04-20 | 2006-09-21 | Busak + Shamban Deutschland Gmbh | 封止装置 |
JP2002081548A (ja) | 2000-09-04 | 2002-03-22 | Honda Motor Co Ltd | シール構造 |
Non-Patent Citations (1)
Title |
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See also references of EP2957795A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107262755A (zh) * | 2017-06-26 | 2017-10-20 | 江苏新光华机械有限公司 | 采用偏心调整镗孔尺寸刀具的安装结构 |
CN110886647A (zh) * | 2019-11-21 | 2020-03-17 | 重庆长安汽车股份有限公司 | 汽油机燃烧室及汽车 |
Also Published As
Publication number | Publication date |
---|---|
EP2957795A4 (en) | 2017-01-25 |
CN105074297B (zh) | 2018-06-12 |
KR101718270B1 (ko) | 2017-03-20 |
US20150369188A1 (en) | 2015-12-24 |
EP2957795A1 (en) | 2015-12-23 |
CN105074297A (zh) | 2015-11-18 |
EP2957795B1 (en) | 2019-11-06 |
JP6036982B2 (ja) | 2016-11-30 |
KR20150104177A (ko) | 2015-09-14 |
US9664162B2 (en) | 2017-05-30 |
JPWO2014126243A1 (ja) | 2017-02-02 |
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