JP2007327612A - Valve sealing structure - Google Patents

Valve sealing structure Download PDF

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JP2007327612A
JP2007327612A JP2006160753A JP2006160753A JP2007327612A JP 2007327612 A JP2007327612 A JP 2007327612A JP 2006160753 A JP2006160753 A JP 2006160753A JP 2006160753 A JP2006160753 A JP 2006160753A JP 2007327612 A JP2007327612 A JP 2007327612A
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rubber
elastic body
valve
pair
contact
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JP2006160753A
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Japanese (ja)
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Koji Tsukamoto
浩司 塚本
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Nok Corp
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Nok Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve sealing structure that prevents breakage of a rubber-like elastic body constituting one of a pair of sealing elements while suppressing the occurrence of a protrusion phenomenon in the rubber-like elastic body in the valve sealing structure in which a pair of the sealing elements is brought into contact with each other or separated from each other in accordance with valve opening/closing operation. <P>SOLUTION: A pair of the sealing elements is composed of a combination of a rigid component such as a metal and the rubber-like elastic body. An annular protrusion 2 is provided on the rigid component. The contact face 6a of the rubber-like elastic body 6, which the annular protrusion 2 is brought into contact with or separated from, is set into a planar shape that is hardly deformed even when pressure is applied. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、バルブの開閉作動に合わせて一対のシール要素が互いに接離する構造のバルブのシール構造に関するものである。本発明のシール構造は例えば、燃料電池用高圧ガスバルブの開閉作動部に用いられる。   The present invention relates to a valve seal structure in which a pair of seal elements come in contact with and separate from each other in accordance with the opening and closing operation of the valve. The seal structure of the present invention is used, for example, in an opening / closing operation part of a high pressure gas valve for a fuel cell.

図３に示す従来のバルブ装置５１においてはその閉弁作動時、図４（Ａ）に示すように弁体５２がゴムリップ（外側シール部）５３および金属部（内側シール部）５４に順次当接するように構成され、すなわち先ずゴムリップ５３に当接してから金属部５４に当接するように構成されている。   In the conventional valve device 51 shown in FIG. 3, when the valve is closed, the valve body 52 sequentially contacts the rubber lip (outer seal portion) 53 and the metal portion (inner seal portion) 54 as shown in FIG. That is, it is configured such that it first contacts the rubber lip 53 and then contacts the metal portion 54.

しかしながらこの構造によると、シールすべきガス圧力の高圧化に伴ってゴムリップ５３が圧力に押されて変形し、はみ出し現象を生じることから、図４（Ｂ）に示すようにゴムリップ５３が弁体５２と金属部５４との間に挟まれて破損してしまうことがある。   However, according to this structure, as the gas pressure to be sealed is increased, the rubber lip 53 is pushed by the pressure and deforms to cause a protrusion phenomenon. Therefore, as shown in FIG. And the metal part 54 may be damaged.

特開平９−１５０７２８号公報JP-A-9-150728

本発明は以上の点に鑑みて、一方のシール要素をなすゴム状弾性体にはみ出し現象が発生するのを抑えることができ、もってその破損を防止することが可能なバルブのシール構造を提供することを目的とする。   In view of the above, the present invention provides a valve seal structure that can suppress the occurrence of a protrusion phenomenon in a rubber-like elastic body constituting one sealing element, and can prevent the damage. For the purpose.

上記目的を達成するため、本発明のシール構造は、バルブの開閉作動に合わせて一対のシール要素が互いに接離する構造のバルブのシール構造において、前記一対のシール要素は、金属等の剛性部品とゴム状弾性体との組み合わせよりなり、前記剛性部品は環状突起を有するとともに前記環状突起が接離する前記ゴム状弾性体の当接面は平面状に設定されていることを特徴とするものである。   In order to achieve the above object, the seal structure of the present invention is a valve seal structure in which a pair of seal elements come in contact with and separate from each other in accordance with the opening / closing operation of the valve, wherein the pair of seal elements are rigid parts such as metal. And the rubber-like elastic body, the rigid part has an annular protrusion, and the contact surface of the rubber-like elastic body to which the annular protrusion comes in contact with and separates is set to be flat. It is.

ゴム状弾性体に高圧が作用したときにゴム状弾性体にはみ出し現象が発生するか否かは、ゴム状弾性体がどのような形状を有しているかが大きく関係し、例えばゴム状弾性体がシールリップを有していると、シールリップは変形し易い形状であることから、はみ出し現象が発生し易いものとなる。この点、本発明ではゴム状弾性体の当接面が平面状に設定され、平面状の形状は変形しにくい形状であることから、はみ出し現象が発生するのを抑えることが可能とされている。   Whether or not the rubber-like elastic body causes a protrusion phenomenon when a high pressure is applied to the rubber-like elastic body is largely related to the shape of the rubber-like elastic body. For example, the rubber-like elastic body If it has a seal lip, since the seal lip has a shape that is easily deformed, the protrusion phenomenon is likely to occur. In this regard, in the present invention, the contact surface of the rubber-like elastic body is set to a flat shape, and the flat shape is a shape that is not easily deformed, so that it is possible to suppress the occurrence of the protrusion phenomenon. .

本発明は、以下の効果を奏する。   The present invention has the following effects.

すなわち、上記構成を備えた本発明のシール構造においては、接離作動する一対のシール要素が剛性部品とゴム状弾性体との組み合わせとされ、剛性部品に環状突起が設けられるとともにこの環状突起が接離するゴム状弾性体の当接面が平面状に設定されていることから、ゴム状弾性体は高圧が作用しても変形しにくい形状とされている。すなわち本発明では、ゴム面が平らであることで圧力がかかったときのゴムの変形を抑えることが可能とされている。したがって、ゴム状弾性体にはみ出し現象が発生するのを抑えることができ、もってその破損を防止することができる。   That is, in the seal structure of the present invention having the above-described configuration, the pair of sealing elements that are operated to contact and separate is a combination of a rigid component and a rubber-like elastic body, and the annular projection is provided on the rigid component. Since the contact surface of the rubber-like elastic body that contacts and separates is set to be flat, the rubber-like elastic body has a shape that does not easily deform even when high pressure is applied. That is, in the present invention, it is possible to suppress deformation of rubber when pressure is applied because the rubber surface is flat. Therefore, it is possible to suppress the occurrence of the protrusion phenomenon in the rubber-like elastic body, and thus it is possible to prevent the damage.

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施例に係るバルブのシール構造を示している。   FIG. 1 shows a valve seal structure according to an embodiment of the present invention.

当該実施例に係るシール構造は、バルブの開閉作動に合わせて一対のシール要素が互いに接離するものであって、一対のシール要素は、金属等の剛性部品である弁体１と弁座側のゴム状弾性体６との組み合わせよりなり、弁体１は環状突起（ビード）２を有し、この環状突起２が接離するゴム状弾性体６の当接面６ａは平面状に設定されている。   In the seal structure according to this embodiment, a pair of seal elements come in contact with and separate from each other in accordance with the opening / closing operation of the valve, and the pair of seal elements is a valve body 1 that is a rigid part such as metal and the valve seat side. The valve body 1 has an annular protrusion (bead) 2, and the contact surface 6 a of the rubber-like elastic body 6 to which the annular protrusion 2 contacts and separates is set to be flat. ing.

環状突起２は、金属または硬質樹脂等の剛材よりなる弁体１の端面部１ａにゴム状弾性体６に向けて一体成形され、またバルブの中心軸線０を中心として環状に形成されている。突起２の先端は、ゴム状弾性体６を傷付けることがないように丸みを帯びた断面形状とされている。   The annular protrusion 2 is formed integrally with the end surface portion 1a of the valve body 1 made of a rigid material such as metal or hard resin toward the rubber-like elastic body 6, and is formed in an annular shape around the central axis 0 of the valve. . The tip of the protrusion 2 has a rounded cross-sectional shape so as not to damage the rubber-like elastic body 6.

ゴム状弾性体６は、これも環状に成形され、バルブボディ３の弁座部４に設けた環状の装着溝５に装着されている。装着溝５およびゴム状弾性体６は共に断面矩形状に成形されている。また、ゴム状弾性体６の当接面６ａはバルブボディ３の端面部３ａよりも若干後退した位置に配置され、これによりゴム状弾性体６の充填率は１００％未満とされ、ゴム状弾性体６は装着溝５内に完全に収容された状態にある。   The rubber-like elastic body 6 is also formed in an annular shape and is attached to an annular attachment groove 5 provided in the valve seat portion 4 of the valve body 3. The mounting groove 5 and the rubber-like elastic body 6 are both formed into a rectangular cross section. Further, the contact surface 6a of the rubber-like elastic body 6 is disposed at a position slightly retracted from the end surface portion 3a of the valve body 3, whereby the filling rate of the rubber-like elastic body 6 is less than 100%, and the rubber-like elasticity The body 6 is completely contained in the mounting groove 5.

図１はバルブの弁開状態を示しており、高圧側空間Ｈから低圧側空間Ｌへ高圧ガスが流れている。この弁開状態からバルブが閉弁作動して弁体１がバルブボディ３に近付く方向に移動すると、図２に示すように環状突起２がゴム状弾性体６の当接面６ａに当接し、若干食い込んだ状態で停止し、弁閉のシール状態が実現されることになる。   FIG. 1 shows a valve open state, in which high pressure gas flows from the high pressure side space H to the low pressure side space L. When the valve is closed from this open state and the valve body 1 moves in the direction approaching the valve body 3, the annular protrusion 2 comes into contact with the contact surface 6a of the rubber-like elastic body 6, as shown in FIG. It stops in the state where it bites in a little, and the seal state of valve closing is realized.

上記構成のシール構造においては、接離作動する一対のシール要素が剛性部品である弁体１とゴム状弾性体６との組み合わせとされ、弁体１の端面部１ａに環状突起２が設けられるとともにこの環状突起２が接離するゴム状弾性体６の当接面６ａが平面状に設定されているために、ゴム状弾性体６は高圧が作用しても変形しにくい形状とされている。したがって、ゴム状弾性体６にはみ出し現象が発生するのを抑えることができ、もってゴム状弾性体６が弁体１とバルブボディ３との間に挟まれて破損するのを防止することができる。   In the seal structure having the above-described configuration, the pair of sealing elements that are brought into contact with and separated from each other is a combination of the valve body 1 that is a rigid part and the rubber-like elastic body 6, and the annular protrusion 2 is provided on the end surface 1 a of the valve body 1. At the same time, since the contact surface 6a of the rubber-like elastic body 6 with which the annular protrusion 2 contacts and separates is set to be flat, the rubber-like elastic body 6 has a shape that is not easily deformed even when high pressure is applied. . Therefore, it is possible to suppress the occurrence of the protruding phenomenon in the rubber-like elastic body 6, thereby preventing the rubber-like elastic body 6 from being sandwiched between the valve body 1 and the valve body 3 and being damaged. .

また、当該実施例では、ゴム状弾性体６が装着溝５内に収容されるとともにその充填率が１００％未満とされているので、これによってもゴム状弾性体６は圧力が作用しても変形しにくく設定されていると云うことができる。   Further, in this embodiment, the rubber-like elastic body 6 is accommodated in the mounting groove 5 and the filling rate thereof is less than 100%. It can be said that it is set to be difficult to deform.

尚、当該実施例では、剛性部品が弁体を形成し、ゴム状弾性体が弁座を形成しているが、反対にゴム状弾性体が弁体を形成し、剛性部品が弁座を形成する構成であっても良く、この場合は、ゴム状弾性体が剛性部品に設けた突起に対して進退することになる。   In this embodiment, the rigid part forms the valve body and the rubber-like elastic body forms the valve seat. Conversely, the rubber-like elastic body forms the valve body, and the rigid part forms the valve seat. In this case, the rubber-like elastic body advances and retreats with respect to the protrusion provided on the rigid component.

本発明の実施例に係るシール構造の弁開状態を示す断面図Sectional drawing which shows the valve open state of the seal structure which concerns on the Example of this invention. 同シール構造の弁閉状態を示す断面図Sectional view showing the valve closed state of the seal structure 従来例に係るバルブ装置の断面図Sectional view of a valve device according to a conventional example 同バルブ装置に備えられるシール構造の断面図Sectional view of the seal structure provided in the valve device

符号の説明Explanation of symbols

１ 弁体（剛性部品）
１ａ，３ａ 端面部
２ 環状突起
３ バルブボディ
４ 弁座部
５ 装着溝
６ ゴム状弾性体
６ａ 当接面
Ｈ 高圧側空間
Ｌ 低圧側空間 1 Valve body (rigid parts)
DESCRIPTION OF SYMBOLS 1a, 3a End surface part 2 Annular protrusion 3 Valve body 4 Valve seat part 5 Mounting groove 6 Rubber-like elastic body 6a Contact surface H High pressure side space L Low pressure side space

Claims (1)

バルブの開閉作動に合わせて一対のシール要素が互いに接離する構造のバルブのシール構造において、
前記一対のシール要素は、金属等の剛性部品とゴム状弾性体との組み合わせよりなり、
前記剛性部品は環状突起を有し、前記環状突起が接離する前記ゴム状弾性体の当接面は平面状に設定されていることを特徴とするバルブのシール構造。 In the valve seal structure in which the pair of seal elements are in contact with each other in accordance with the opening / closing operation of the valve,
The pair of sealing elements is a combination of a rigid part such as metal and a rubber-like elastic body,
2. The valve seal structure according to claim 1, wherein the rigid part has an annular protrusion, and a contact surface of the rubber-like elastic body with which the annular protrusion contacts and is separated is set to be flat.
JP2006160753A 2006-06-09 2006-06-09 Valve sealing structure Withdrawn JP2007327612A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017154635A (en) * 2016-03-02 2017-09-07 日立オートモティブシステムズ株式会社 Brake device, plunger pump and method for manufacturing plunger pump
KR20180112872A (en) * 2016-04-11 2018-10-12 엠케이에스 인스트루먼츠, 인코포레이티드 Active cooling vacuum isolation valve
WO2023058912A1 (en) * 2021-10-07 2023-04-13 영도산업 주식회사 Airtight structure of high-pressure fluid control valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017154635A (en) * 2016-03-02 2017-09-07 日立オートモティブシステムズ株式会社 Brake device, plunger pump and method for manufacturing plunger pump
KR20180112872A (en) * 2016-04-11 2018-10-12 엠케이에스 인스트루먼츠, 인코포레이티드 Active cooling vacuum isolation valve
JP2019513948A (en) * 2016-04-11 2019-05-30 エム ケー エス インストルメンツ インコーポレーテッドＭｋｓ Ｉｎｓｔｒｕｍｅｎｔｓ，Ｉｎｃｏｒｐｏｒａｔｅｄ Actively cooled vacuum isolation valve
KR102184334B1 (en) * 2016-04-11 2020-12-01 엠케이에스 인스트루먼츠, 인코포레이티드 Active Cooled Vacuum Isolation Valve
US11054058B2 (en) 2016-04-11 2021-07-06 Mks Instruments, Inc. Actively cooled vacuum isolation valve
WO2023058912A1 (en) * 2021-10-07 2023-04-13 영도산업 주식회사 Airtight structure of high-pressure fluid control valve

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