JP2005337424A - Sealing device - Google Patents

Sealing device Download PDF

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JP2005337424A
JP2005337424A JP2004158699A JP2004158699A JP2005337424A JP 2005337424 A JP2005337424 A JP 2005337424A JP 2004158699 A JP2004158699 A JP 2004158699A JP 2004158699 A JP2004158699 A JP 2004158699A JP 2005337424 A JP2005337424 A JP 2005337424A
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lip
sub
seal
main
seal lip
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Japanese (ja)
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Yasuaki Tanabe
靖章 田邉
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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 sealing device capable of corresponding to the versatile specification change without damaging the function of packing such as sealing performance, in case that it corresponds only by a change in distance between the lip being the gap between a main seal lip and a sub-seal lip when changing the stroke volume of a fuel pump with the sealing device. <P>SOLUTION: One packing 4 is formed by connecting the main lip part 11 with a main seal lip 13 to seal the fuel mainly and sliding contact with a plunger 2 located to the fuel side with the sub-lip part 21 with the sub-seal lip 22 to seal the oil mainly and sliding contact with the plunger 2 located to the atmospheric side. It makes that this seal can correspond to the change of distance L between the lips of the packing by changing the distance L1 between the top part of a connection face 25 and the sub-seal lip 22 of a sub-lip part 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、主シールリップと副シールリップの２種類のシールリップを有するパッキンからなる密封装置であって、主に直噴型エンジン用燃料ポンプに用いられ、その他の油圧・空圧・水圧機器全般に用いられる密封装置に関する。   The present invention is a sealing device comprising a packing having two types of seal lips, a main seal lip and a sub-seal lip, which is mainly used for a fuel pump for a direct injection engine, and other hydraulic, pneumatic and hydraulic devices. The present invention relates to a sealing device used in general.

直噴型エンジンは、近年の排ガス規制や燃費改善等を目的として、シリンダ内に高圧力の燃料を直接噴射して燃焼させるものであり、高圧力の燃料を直接噴射するために用いられる燃料ポンプに使用される密封装置は、燃料であるガソリン等を高圧にしたものを密封対象側でシールする主シールリップと、反密封対象側に存在する冷却や潤滑を目的としたオイルをシールする副シールリップを一体としたパッキンを有することが知られている（下記特許文献1を参照）。また、密封装置の形状としては、断面が略Ｕ字形のパッキンと、このパッキンの凹溝に内装されて張り力を与える内装弾性体を有する形状が知られている（下記特許文献２を参照）。   The direct-injection engine is a fuel pump used to directly inject high-pressure fuel into a cylinder for direct injection of high-pressure fuel for the purpose of exhaust gas regulations and fuel efficiency improvement in recent years. The main sealing lip that seals the high pressure of gasoline, etc., which is the fuel, on the sealing target side, and the secondary seal that seals the oil existing on the anti-sealing target side for cooling and lubrication purposes It is known to have a packing with an integrated lip (see Patent Document 1 below). In addition, as a shape of the sealing device, a shape having a packing having a substantially U-shaped cross section and an internal elastic body that is provided in a concave groove of the packing and gives tension is known (see Patent Document 2 below). .

図８に示す通り、断面が略Ｕ字形である主シールリップ１０１を有する主リップ部１０２と副シールリップ１０３を有する副リップ部１０４が一体となったパッキン１０５を有する密封装置１０６を燃料ポンプに装着する場合、吐出量の変更・調整等のためにストローク量が変更されたときは、燃料ポンプの構造は略同一であるので、通常は燃料を主にシールする主シールリップ１０１を有する主リップ部１０２を変更する必要はなく、ストローク量の変更に対応した主シールリップ１０１の先端部と副シールリップ１０３の先端部との距離であるリップ間距離Ｌ１０を変更して対応するだけで良い。しかし、主シールリップ１０１と副シールリップ１０２が一体であるのでストローク量の変更に対応するためには、主リップ部１０２を含むリップ間距離Ｌ１０の異なる個々の仕様を設定する必要があり、そのためにストローク量の変更に対して汎用的な仕様変更で対応できないとの問題点を有していた。   As shown in FIG. 8, a sealing device 106 having a packing 105 in which a main lip portion 102 having a main seal lip 101 having a substantially U-shaped cross section and a sub lip portion 104 having a sub seal lip 103 is integrated with a fuel pump. In the case of mounting, when the stroke amount is changed due to the change or adjustment of the discharge amount, the structure of the fuel pump is substantially the same, so the main lip having the main seal lip 101 that mainly seals fuel normally It is not necessary to change the portion 102, and it is only necessary to change the distance L10 between the lips, which is the distance between the front end portion of the main seal lip 101 and the front end portion of the sub seal lip 103 corresponding to the change in stroke amount. However, since the main seal lip 101 and the sub seal lip 102 are integrated, it is necessary to set different individual specifications for the distance L10 between the lips including the main lip portion 102 in order to cope with the change in stroke amount. However, there is a problem that the change in stroke amount cannot be handled by a general-purpose specification change.

特開平８−６８３７０号公報JP-A-8-68370 特許２９５５８２２号公報Japanese Patent No. 2955822

本発明は以上の点に鑑みて、密封装置を装着する燃料ポンプのストローク量の変更に対して主シールリップと副シールリップとの間隙であるリップ間距離のみの変更で対応する場合に、シール性などのパッキンとしての機能を損なうことなく汎用的な仕様変更で対応することができる密封装置を提供することを目的とする。   In view of the above points, the present invention provides a seal when the change in the stroke amount of the fuel pump to which the sealing device is attached is handled only by changing the distance between the lips, which is the gap between the main seal lip and the sub seal lip. It aims at providing the sealing device which can respond by a general-purpose specification change, without impairing the function as packing, such as property.

上記目的を達成するため、本発明の請求項１にかかる密封装置は、互いに相対可動自在に組み付けられた２部材間の環状の隙間をシールするもので、燃料側に位置し前記一の部材に摺接して主に燃料をシールする主シールリップと、大気側に位置し前記一の部材に摺接して主にオイルをシールする副シールリップと、２種類のシールリップを有するパッキンから成る密封装置であって、前記主シールリップを有する主リップ部と前記副シールリップを有する副リップ部とが結合して一の前記パッキンを形成し、前記副リップ部の結合面と前記副シールリップの先端部との距離を変更することで前記パッキンのリップ間距離の変更に対応することができることを特徴とするものである。   In order to achieve the above object, a sealing device according to claim 1 of the present invention seals an annular gap between two members which are assembled so as to be relatively movable with respect to each other. A sealing device comprising a main seal lip that mainly seals fuel by sliding contact, a sub-seal lip that is located on the atmosphere side and that slidably contacts the one member and mainly seals oil, and a packing having two types of seal lips The main lip portion having the main seal lip and the sub lip portion having the sub seal lip are combined to form one packing, and the connecting surface of the sub lip portion and the tip of the sub seal lip By changing the distance to the part, it is possible to cope with a change in the distance between the lips of the packing.

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請求項１の密封装置は、燃料側に位置し一の部材に摺接して主に燃料をシールする主シールリップを有する主リップ部と、大気側に位置し前記一の部材に摺接して主にオイルをシールする副シールリップを有する副リップ部とが結合して一のパッキンを形成し、副リップ部の結合面と副シールリップの先端部との距離でパッキンのリップ間距離に対応することができるので、燃料ポンプのストローク量が変更されたことによりリップ間距離を変更する場合、主リップ部を変更することなく副リップ部の結合面と副シールリップの先端部との距離を変更することでリップ間距離の変更に対応することができる。したがって、ストローク量違いの燃料ポンプに密封装置を装着する場合、燃料をシールする主シールリップを有する主リップ部は変更せずに副リップ部だけを変更して対応することができるので、主となる密封性能を損なうことなく汎用的な仕様変更で対応することができる。   That is, the sealing device according to the first aspect of the present invention having the above-described configuration includes a main lip portion having a main seal lip that is located on the fuel side and that is in sliding contact with one member and mainly seals the fuel, and is located on the atmosphere side. And a secondary lip portion having a secondary seal lip that is slidably contacted with the one member and mainly seals oil to form a single packing, and the coupling surface of the secondary lip portion and the tip of the secondary seal lip Since the distance between the lips of the packing can be accommodated by the distance, when the distance between the lips is changed by changing the stroke amount of the fuel pump, the connecting surface of the auxiliary lip portion and the auxiliary lip portion are not changed without changing the main lip portion. By changing the distance from the tip of the seal lip, it is possible to cope with a change in the distance between the lips. Therefore, when a sealing device is attached to a fuel pump with a different stroke amount, the main lip portion having the main seal lip for sealing the fuel can be changed without changing the sub lip portion. It is possible to cope with general-purpose specification changes without impairing the sealing performance.

以下に図面を参照して、この発明の好適な実施の形態を例示して説明する。ただし、この発明の範囲は、特に限定的記載がないかぎりは、この実施の形態に記載されている内容に限定する趣旨のものではない。   Preferred embodiments of the present invention will be described below with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

図１は、本発明の実施例に係る密封装置１の断面図である。   FIG. 1 is a cross-sectional view of a sealing device 1 according to an embodiment of the present invention.

密封装置１は、燃料ポンプ内のプランジャ２とハウジング３との間に形成された環状の空間に装着されていて、燃料側Ａに位置する主リップ部１１と、主リップ部の内部に形成されている凹溝に内装されて張り力を与えている内装弾性体１２と、主リップ部１１と結合してパッキン４を形成する副リップ部２１から構成されている。主リップ部１１と副リップ部２１の材質としては、一般的にはＴＴＦＥ等の樹脂が用いられるが、合成ゴム等のゴムが用いられる場合もある。また、内装弾性体１２の材質としては、ステンレス鋼等の金属バネが用いられる。   The sealing device 1 is mounted in an annular space formed between the plunger 2 and the housing 3 in the fuel pump, and is formed in a main lip portion 11 located on the fuel side A and inside the main lip portion. It is comprised from the interior elastic body 12 which is comprised by the inside of the recessed groove which gives tension | tensile_strength, and the sub lip part 21 which couple | bonds with the main lip | rip part 11 and forms the packing 4. FIG. As a material of the main lip portion 11 and the sub lip portion 21, a resin such as TTFE is generally used, but a rubber such as a synthetic rubber may be used. Moreover, as a material of the interior elastic body 12, a metal spring such as stainless steel is used.

主リップ部１１は、燃料側Ａに位置し断面形状が略Ｕ字型をしており、内周側でプランジャ２と摺接し主に燃料をシールする主シールリップ１３と、主シールリップ１３より反燃料側Ｂに位置する第二シールリップ１４と、シールリップ１３，１４と反対の外周側であってハウジング２と密接する第一シール部１５から構成されている。   The main lip portion 11 is located on the fuel side A and has a substantially U-shaped cross section. The main lip portion 11 includes a main seal lip 13 that slides in contact with the plunger 2 on the inner peripheral side and mainly seals the fuel. The second seal lip 14 is located on the anti-fuel side B, and the first seal portion 15 is on the outer peripheral side opposite to the seal lips 13 and 14 and is in close contact with the housing 2.

副リップ部２１は、主リップ部１１より反燃料側Ｂに位置し、内周側でプランジャ２と摺接し主にオイルをシールする副シールリップ２２と、副シールリップ２２より燃料側Ａに位置する副リップ部第二シールリップ２３と、シールリップ２２，２３と反対の外周側であってハウジングに密接する第二シール部２４から構成されていて、主リップとの結合している副リップ部２１の結合面２５と副シールリップ２２の先端部との距離Ｌ１は、主シールリップ１３の先端部と副シールリップ２２の先端部との距離であるリップ間距離Ｌの変更に対応して変更されるようになっている。   The sub lip portion 21 is positioned on the fuel side B from the main lip portion 11, and is positioned on the fuel side A from the sub seal lip 22 and the sub seal lip 22 that is in sliding contact with the plunger 2 on the inner peripheral side and mainly seals oil. The secondary lip portion is composed of the second seal lip 23 and the second seal portion 24 on the outer peripheral side opposite to the seal lips 22 and 23 and in close contact with the housing, and is connected to the main lip. The distance L1 between the coupling surface 25 of 21 and the front end of the sub seal lip 22 is changed in accordance with the change in the inter-lip distance L, which is the distance between the front end of the main seal lip 13 and the front end of the sub seal lip 22. It has come to be.

パッキン４は、主リップ部１１と副リップ部２１とが結合して形成されていて、密封装置１が装着される燃料ポンプのストローク量が変更になった場合には、主シールリップ１３の先端部と副シールリップ２２の先端部との距離であるリップ間距離Ｌを変更して対応することができるようになっている。   The packing 4 is formed by joining the main lip portion 11 and the sub lip portion 21. When the stroke amount of the fuel pump to which the sealing device 1 is attached is changed, the tip of the main seal lip 13 is formed. It is possible to cope with this by changing the distance L between the lips, which is the distance between the portion and the tip of the sub seal lip 22.

上記構成の密封装置１を燃料ポンプ内のプランジャ２とハウジング３との間に形成された環状の空間に装着する場合において、燃料ポンプのストローク量の変更に対応して主シールリップ１３の先端部と副シールリップ２２の先端部との距離であるリップ間距離Ｌを変更する必要があるときには、主リップ部１１と副リップ部２１が結合しているので、副リップ部２１の結合面２５と副シールリップ２２の先端部との距離Ｌ１を変更することで対応することが可能となった。したがって、ストローク量の変更に対応してリップ間距離Ｌを変更する場合に、燃料を主にシールし密封性能を発揮している主リップ部１１を変更せずに副リップ部２１の変更だけで対応することができるので、汎用的な仕様変更で対応することが可能となる。   When the sealing device 1 having the above configuration is mounted in an annular space formed between the plunger 2 and the housing 3 in the fuel pump, the tip end portion of the main seal lip 13 corresponding to the change in the stroke amount of the fuel pump. When the distance L between the lips, which is the distance between the lip portion 22 and the front end portion of the sub seal lip 22, needs to be changed, the main lip portion 11 and the sub lip portion 21 are coupled. It has become possible to cope with this problem by changing the distance L1 from the tip of the sub seal lip 22. Therefore, when the distance L between the lips is changed in response to the change in the stroke amount, only the sub lip portion 21 is changed without changing the main lip portion 11 which mainly seals the fuel and exhibits the sealing performance. Since it can respond, it becomes possible to respond by a general-purpose specification change.

なお、上記実施例においては、主リップ部と副リップ部の結合部は断面が垂直線で表される形状であるが、断面形状が図２乃至図７に示す通りの形状であっても良い。   In the above embodiment, the connecting portion of the main lip portion and the sub lip portion has a shape whose cross section is represented by a vertical line, but the cross sectional shape may be a shape as shown in FIGS. .

また、主リップ部と副クリップ部の材質は同一であることが望ましいが、異なる材質であっても良い。   The main lip portion and the sub clip portion are preferably made of the same material, but may be made of different materials.

本発明の実施例１に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 1 of this invention 本発明の実施例２に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 2 of this invention 本発明の実施例３に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 3 of this invention 本発明の実施例４に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 4 of this invention 本発明の実施例５に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 5 of this invention 本発明の実施例６に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 6 of this invention 本発明の実施例７に係る密封装置の断面図Sectional drawing of the sealing device which concerns on Example 7 of this invention 従来例に係る密封装置の断面図Sectional drawing of the sealing device which concerns on a prior art example

符号の説明Explanation of symbols

１ 密封装置
２ プランジャ
３ ハウジング
４ パッキン
１１ 主リップ部
１２ 内装弾性部材
１３ 主シールリップ
１４，２３ 第二シールリップ先端部
１５，２４ シール部
２１ 副リップ部
２２ 副シールリップ
２５ 結合面
Ｌ リップ間距離
Ｌ１ 結合面と副シールリップとの距離
Ａ 燃料側
Ｂ 反燃料側 DESCRIPTION OF SYMBOLS 1 Sealing device 2 Plunger 3 Housing 4 Packing 11 Main lip part 12 Interior elastic member 13 Main seal lip 14, 23 Second seal lip tip part 15, 24 Seal part 21 Sub lip part 22 Sub seal lip 25 Joint surface L Distance between lips L1 Distance between coupling surface and secondary seal lip A Fuel side B Anti-fuel side

Claims (1)

互いに相対可動自在に組み付けられた２部材間の環状の隙間をシールするもので、燃料側に位置し前記一の部材に摺接して主に燃料をシールする主シールリップと、大気側に位置し前記一の部材に摺接して主にオイルをシールする副シールリップと、２種類のシールリップを有するパッキンから成る密封装置であって、
前記主シールリップを有する主リップ部と前記副シールリップを有する副リップ部とが結合して一の前記パッキンを形成し、前記副リップ部の結合面と前記副シールリップの先端部との距離を変更することで前記パッキンのリップ間距離の変更に対応することができることを特徴とする密封装置。 It seals an annular gap between two members that are assembled so as to be movable relative to each other. A main seal lip that is located on the fuel side and slidably contacts the one member to mainly seal the fuel, and is located on the atmosphere side. A sealing device comprising a secondary seal lip that is slidably contacted with the one member and mainly seals oil, and a packing having two types of seal lips,
The main lip portion having the main seal lip and the sub lip portion having the sub seal lip are combined to form one packing, and the distance between the connecting surface of the sub lip portion and the tip of the sub seal lip By changing the above, it is possible to cope with a change in the distance between the lips of the packing.
JP2004158699A 2004-05-28 2004-05-28 Sealing device Pending JP2005337424A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013000514A1 (en) * 2013-01-15 2014-07-17 Carl Freudenberg Kg Sealing arrangement and its use

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003021241A (en) * 2001-07-06 2003-01-24 Hitachi Ltd Sealing mechanism and fuel pump with the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003021241A (en) * 2001-07-06 2003-01-24 Hitachi Ltd Sealing mechanism and fuel pump with the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013000514A1 (en) * 2013-01-15 2014-07-17 Carl Freudenberg Kg Sealing arrangement and its use
KR20140092250A (en) * 2013-01-15 2014-07-23 엔오케이 가부시키가이샤 Sealing device and method of using the same
JP2014137139A (en) * 2013-01-15 2014-07-28 Nok Corp Sealing device and its use method
DE102013000514B4 (en) * 2013-01-15 2015-09-24 Carl Freudenberg Kg Sealing arrangement and its use
KR102148039B1 (en) * 2013-01-15 2020-08-26 엔오케이 가부시키가이샤 Sealing device and method of using the same

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