JP2017198256A - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
JP2017198256A
JP2017198256A JP2016088103A JP2016088103A JP2017198256A JP 2017198256 A JP2017198256 A JP 2017198256A JP 2016088103 A JP2016088103 A JP 2016088103A JP 2016088103 A JP2016088103 A JP 2016088103A JP 2017198256 A JP2017198256 A JP 2017198256A
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metal ring
seal lip
sealing device
peripheral surface
outer peripheral
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Japanese (ja)
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祐也 坂野
yuya Sakano
祐也 坂野
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Nok Corp
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Nok Corp
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  • Exhaust-Gas Circulating Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Lubricants (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the fixation of a seal lip by preventing the adhesion of the seal lip caused by the accumulation of soot or the like between an external peripheral face of the seal lip and an internal peripheral face of a metal side, and to prevent the lowering of a fastening margin of the seal lip and the lowering of the flexibility of the seal lip.SOLUTION: This sealing device comprises a metal ring 20 which is fit to an internal peripheral face of a housing, and a seal lip 40 which slidably contacts with an external peripheral face of a shaft which penetrates an axial hole internal periphery of a housing by extending from one end part of the metal ring. The metal ring is composed of a metal ring main body 21 which is concentric with a rotating shaft, and a flange part 33 extending toward an inside diameter direction from the other end part of the metal ring main body, and a labyrinth c is formed between an internal peripheral face of the flange part and the external peripheral face of the shaft.SELECTED DRAWING: Figure 1

Description

本発明は密封装置に係り、例えば、車両の排気ガス再循環システム（以下、ＥＧＲシステムという）におけるバタフライバルブの弁軸周を密封する密封装置に関する。   The present invention relates to a sealing device, for example, a sealing device that seals the periphery of a valve shaft of a butterfly valve in an exhaust gas recirculation system (hereinafter referred to as an EGR system) of a vehicle.

従来から、図３に示すような車両のＥＧＲシステムに用いられるバタフライバルブ５０が知られている。このバタフライバルブ５０は、筒状部材５１に形成された流路５１ａの中心線と直交する方向に設けられるハウジング５２と、このハウジング５２に形成された軸孔５２ａの軸孔内周５２ｂに挿通される弁軸５３と、流路５１ａに配置されるとともに弁軸５３に取り付けられ、不図示のモータからの駆動力によって回転し、流路５１ａの流路断面積を変化させる弁体５４と、を備えている。   Conventionally, a butterfly valve 50 used in a vehicle EGR system as shown in FIG. 3 is known. The butterfly valve 50 is inserted into a housing 52 provided in a direction orthogonal to the center line of the flow path 51 a formed in the tubular member 51, and a shaft hole inner periphery 52 b of the shaft hole 52 a formed in the housing 52. A valve shaft 53, and a valve body 54 that is disposed in the flow path 51a and attached to the valve shaft 53, and that rotates by a driving force from a motor (not shown) to change the flow path cross-sectional area of the flow path 51a. I have.

そして、図３、図４に示すように、バタフライバルブ５０には、ハウジング５２の内周面５２ｃに嵌合する金属環５３０と、弁軸５３の外周面５３ａに摺動自在に接触するＰＴＦＥ製のシールリップ５４０と、を備えた密封装置１０が取り付けられている。また、筒状部材５１に形成された流路５１ａと密封装置１０の軸方向中間地点には、不図示のワイヤーフィルタが配置されている。   As shown in FIGS. 3 and 4, the butterfly valve 50 includes a metal ring 530 fitted to the inner peripheral surface 52 c of the housing 52 and a PTFE made slidably in contact with the outer peripheral surface 53 a of the valve shaft 53. A sealing device 10 having a sealing lip 540 is attached. In addition, a wire filter (not shown) is disposed at the intermediate point in the axial direction of the flow path 51 a formed in the tubular member 51 and the sealing device 10.

かかるバタフライバルブ５０によれば、ハウジング５２の軸孔内周５２ｂと、この軸孔内周５２ｂに挿通された弁軸５３との間の空間を密封対象側Ａと反密封対象側Ｂとに区画し、かつ、ワイヤーフィルタが排気ガス中の煤等を捕捉し、その侵入を抑止する。   According to the butterfly valve 50, a space between the shaft hole inner periphery 52b of the housing 52 and the valve shaft 53 inserted through the shaft hole inner periphery 52b is divided into a sealing target side A and an anti-sealing target side B. In addition, the wire filter captures soot and the like in the exhaust gas and suppresses its entry.

しかし、上記構成のバタフライバルブ５０は、ワイヤーフィルタを設けることで煤等の侵入を抑制しているが完全に遮断することは困難である。   However, although the butterfly valve 50 having the above-described configuration suppresses intrusion of wrinkles and the like by providing a wire filter, it is difficult to completely block it.

そして、この煤等がワイヤーフィルタを通過すると、シールリップ５４０の外周面５４３と、金属環５３０の内周面５３４ａ側との間に煤等が堆積し、シールリップ５４０が固着することでシールリップ５４０が固定され、シールリップ５４０の締め代が低下し、シールリップ５４０の柔軟性が低下する可能性がある。そのため、図４に示す密封装置１０は、煤等が堆積するたびに交換する等といった措置を講じなければならないおそれがある。   And when this wrinkle etc. passes a wire filter, wrinkles etc. accumulate between the outer peripheral surface 543 of seal lip 540 and the inner peripheral surface 534a side of metal ring 530, and seal lip 540 adheres, and seal lip 540 is fixed, the tightening margin of the seal lip 540 is reduced, and the flexibility of the seal lip 540 may be reduced. Therefore, there is a possibility that the sealing device 10 shown in FIG. 4 needs to be taken such as replacement every time the soot is accumulated.

また、上記バタフライバルブ５０に用いられる密封装置１０として、図５に示すように、ハウジング５２の内周面５２ｃに嵌合される外周側金属環５２０と、この外周側金属環５２０の内周面に嵌合される内周側金属環５３０と、外周側金属環５２０と内周側金属環５３０との間に配置され、弁軸５３の外周面５３ａと密接するように強制変形させられているＰＴＦＥ製のシールリップ５４０と、を備えたものも知られている。   Further, as the sealing device 10 used for the butterfly valve 50, as shown in FIG. 5, the outer peripheral side metal ring 520 fitted to the inner peripheral surface 52c of the housing 52, and the inner peripheral surface of the outer peripheral side metal ring 520 Are arranged between the inner peripheral side metal ring 530, the outer peripheral side metal ring 520 and the inner peripheral side metal ring 530, and are forcibly deformed so as to be in close contact with the outer peripheral surface 53a of the valve shaft 53. A thing provided with the seal lip 540 made from PTFE is also known.

この密封装置１０によれば、シールリップ５４０が弁軸５３の外周面５３ａと密接するように強制変形させられているため、初期締め代が大きく、密封対象側Ａから反密封空間側Ｂへ通過しようとする煤等の侵入をより効果的に防止することができる。   According to this sealing device 10, since the seal lip 540 is forcibly deformed so as to be in close contact with the outer peripheral surface 53 a of the valve shaft 53, the initial tightening allowance is large, and it passes from the object to be sealed A to the anti-sealed space side B. It is possible to more effectively prevent the intrusion of the wrinkles to be attempted.

ところが、図５に示す密封装置１０は、シールリップ５４０の外周面５４３と、内周側金属環５３０の内周面５３４ａとの間に煤等が堆積してしまうという点に関して更なる改善の余地がある。   However, in the sealing device 10 shown in FIG. 5, there is room for further improvement in that soot and the like are accumulated between the outer peripheral surface 543 of the seal lip 540 and the inner peripheral surface 534 a of the inner metal ring 530. There is.

特開２００７−３２３０１号公報JP 2007-32301 A 特開２０１０−６５７２９号公報JP 2010-65729 A

本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、シールリップの外周面と金属側の内周面との間に煤等の堆積によるシールリップの固着を防止することで、シールリップが固定されることを防止し、もって、シールリップの締め代の低下やシールリップの柔軟性の低下を防止することにある。   The present invention has been made in view of the above points, and its technical problem is that the seal lip is fixed by accumulation of soot or the like between the outer peripheral surface of the seal lip and the inner peripheral surface of the metal side. By preventing the seal lip from being fixed, the seal lip is prevented from being lowered and the flexibility of the seal lip is prevented from being lowered.

上述した技術的課題を有効に解決するための手段として、本発明の密封装置は、ハウジングの内周面に嵌合する金属環と、前記金属環の一方の端部から延びることで、前記ハウジングの軸孔内周に挿通された軸の外周面に摺動自在に接触するシールリップと、を備えた密封装置において、前記金属環は、軸と同心状の金属環本体と、この金属環本体の他方の端部から内径方向にむけて延在するフランジ部と、からなり、前記フランジ部の内周面と、前記軸の外周面との間には、ラビリンスが形成されていることを特徴とする。   As a means for effectively solving the technical problem described above, the sealing device of the present invention includes a metal ring fitted to the inner peripheral surface of the housing, and extending from one end of the metal ring, so that the housing A sealing lip slidably contacting the outer peripheral surface of the shaft inserted through the inner periphery of the shaft hole, wherein the metal ring is a metal ring body concentric with the shaft, and the metal ring body A flange portion extending from the other end portion toward the inner diameter direction, and a labyrinth is formed between the inner peripheral surface of the flange portion and the outer peripheral surface of the shaft. And

また、前記フランジ部の内周側端部には、前記フランジ部の軸方向幅が長大となるクランク状の差込部が形成され、前記シールリップの先端縁が前記差込部へ差し込まれることで、前記差込部の内面と、前記シールリップの外周面及び先端面との間には、ラビリンスが形成されていてもよい。   In addition, a crank-shaped insertion portion in which an axial width of the flange portion is long is formed at an inner peripheral side end portion of the flange portion, and a leading edge of the seal lip is inserted into the insertion portion. And the labyrinth may be formed between the inner surface of the said insertion part, and the outer peripheral surface and front-end | tip surface of the said seal lip.

また、前記シールリップは、ポリテトラフルオロエチレンからなり、前記密封装置は、バタフライバルブ用のオイルシールであってもよい。   The seal lip may be made of polytetrafluoroethylene, and the sealing device may be an oil seal for a butterfly valve.

上記構成の密封装置によれば、金属環が弁軸の外周面との間に微小の隙間たるラビリンスを形成するため、密封対象側から煤等の侵入を防止し、シールリップの外周面と金属環との間に煤等が堆積することを防止し、シールリップが固定されることに伴うシールリップの締め代の低下やシールリップの柔軟性の低下を防止することができる。   According to the sealing device having the above configuration, the metal ring forms a labyrinth that is a minute gap between the valve shaft and the outer peripheral surface of the valve shaft. It is possible to prevent soot and the like from accumulating between the ring and the seal lip and the flexibility of the seal lip can be prevented from being lowered as the seal lip is fixed.

本発明の実施形態に係る密封装置を示す断面図である。It is sectional drawing which shows the sealing device which concerns on embodiment of this invention. 本発明の実施形態に係る密封装置におけるシールリップの先端縁近傍を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the front-end edge vicinity of the seal lip in the sealing device which concerns on embodiment of this invention. バタフライバルブを示す断面図である。It is sectional drawing which shows a butterfly valve. 従来技術に係る密封装置の一の例を示す断面図である。It is sectional drawing which shows an example of the sealing device which concerns on a prior art. 従来技術に係る密封装置の他の例を示す断面図である。It is sectional drawing which shows the other example of the sealing device which concerns on a prior art.

以下において、本発明の実施形態に係る密封装置１０について図面に基づき詳細に説明する。図１は、本発明の実施形態に係る密封装置１０を示す断面図であり、図２は、本発明の実施形態に係る密封装置１０におけるシールリップ４０の先端縁４２近傍を示す要部拡大断面図である。なお、本実施形態に係る密封装置１０における密封対象側Ａ及び反密封対象側Ｂは、請求項に記載の他方の端部及び一方の端部に相当する。   Hereinafter, a sealing device 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a sealing device 10 according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part showing the vicinity of a tip edge 42 of a seal lip 40 in the sealing device 10 according to an embodiment of the present invention. FIG. In addition, the sealing target side A and the anti-sealing target side B in the sealing device 10 according to the present embodiment correspond to the other end and one end described in the claims.

本実施形態に係る密封装置１０は、図３に示すような車両のＥＧＲシステムに用いられるバタフライバルブ５０に装着されるものである。このバタフライバルブ５０は、筒状部材５１に形成された流路５１ａの中心線と直交する方向に設けられるハウジング５２と、このハウジング５２に形成された軸孔５２ａの軸孔内周５２ｂに挿通される弁軸５３と、流路５１ａに配置されるとともに弁軸５３に取り付けられ、不図示のモータからの駆動力によって回転し、流路５１ａの流路断面積を変化させる弁体５４と、を備えている。   The sealing device 10 according to this embodiment is mounted on a butterfly valve 50 used in a vehicle EGR system as shown in FIG. The butterfly valve 50 is inserted into a housing 52 provided in a direction orthogonal to the center line of the flow path 51 a formed in the tubular member 51, and a shaft hole inner periphery 52 b of the shaft hole 52 a formed in the housing 52. A valve shaft 53, and a valve body 54 that is disposed in the flow path 51a and attached to the valve shaft 53, and that rotates by a driving force from a motor (not shown) to change the flow path cross-sectional area of the flow path 51a. I have.

密封装置１０は、ハウジング５２の内周面５２ｃに嵌合される外周側金属環２０と、この外周側金属環２０の内周面に金属嵌合される内周側金属環３０と、外周側金属環２０と内周側金属環３０との間に挟持されるシールリップ４０と、からなる。   The sealing device 10 includes an outer peripheral side metal ring 20 fitted to the inner peripheral surface 52c of the housing 52, an inner peripheral side metal ring 30 fitted to the inner peripheral surface of the outer peripheral side metal ring 20, and an outer peripheral side. A seal lip 40 sandwiched between the metal ring 20 and the inner metal ring 30.

外周側金属環２０は、全体がコ字状をなし、ハウジング５２と同心状にある外周側金属環本体２１と、この外周側金属環本体２１の反密封対象側Ｂの端部から内径方向に向けて折り曲げられる外周側挟持部２２と、この外周側金属環本体２１の密封対象側Ａの端部から内径方向に向けて折り曲げられる折り曲げ部２３とからなる。また、図１に示すようにこの外周側金属環２０は、後述する内周側金属環３０とシールリップ４０の基端４１を覆うほどの軸方向長さを有する。   The outer peripheral side metal ring 20 is generally U-shaped and is concentric with the housing 52, and the outer peripheral side metal ring main body 21 and the end of the outer peripheral side metal ring main body 21 on the anti-sealing target side B in the inner diameter direction. The outer peripheral side clamping part 22 bent toward the outer periphery and the bent part 23 bent toward the inner diameter direction from the end of the outer peripheral side metal ring body 21 on the sealing target side A. As shown in FIG. 1, the outer peripheral side metal ring 20 has an axial length that covers an inner peripheral side metal ring 30 and a base end 41 of the seal lip 40 described later.

内周側金属環３０は、ハウジング５２及び外周側金属環本体２１と同心状にある内周側金属環本体３１と、この内周側金属環本体３１の反密封対象側Ｂの端部から内径方向に向けて折り曲げられる内周側挟持部３２と、この内周側金属環本体３１の密封対象側Ａの端部から内径方向に向けて折り曲げられるフランジ部３３と、からなる。また、フランジ部３３の内周側には、差込部３４が形成されている。   The inner peripheral side metal ring 30 includes an inner peripheral side metal ring main body 31 concentric with the housing 52 and the outer peripheral side metal ring main body 21, and an inner diameter from the end of the inner peripheral side metal ring main body 31 on the anti-sealing target side B. The inner peripheral side clamping part 32 bent toward the direction and the flange part 33 bent toward the inner diameter direction from the end of the sealing target side A of the inner peripheral side metal ring body 31. An insertion portion 34 is formed on the inner peripheral side of the flange portion 33.

差込部３４は、フランジ部３３の内径方向の途中（フランジ部３３の内周側端部）に設けられるものであって、全体がクランク状をなすものである。この差込部３４が設けられることで、フランジ部３３は、差込部３４を境に図１に示すように軸方向幅が長大となり、差込部３４の内周端は、軸方向に凹んでいる。そして、図２に示すように、差込部３４（フランジ部３３）の内周面３４ａと弁軸５３の外周面５３ａとの間には、軸方向に延びる微小の隙間ｃ３たるラビリンスが設定されている。   The insertion part 34 is provided in the middle of the flange part 33 in the inner diameter direction (end part on the inner peripheral side of the flange part 33), and the whole forms a crank shape. By providing this insertion portion 34, the flange portion 33 has a long axial width as shown in FIG. 1 with the insertion portion 34 as a boundary, and the inner peripheral end of the insertion portion 34 is recessed in the axial direction. It is out. As shown in FIG. 2, a labyrinth that is a minute gap c <b> 3 extending in the axial direction is set between the inner peripheral surface 34 a of the insertion portion 34 (flange portion 33) and the outer peripheral surface 53 a of the valve shaft 53. ing.

シールリップ４０は、化学的に安定的で耐熱性、耐化学性に優れるポリテトラフルオロエチレンなどといったフッ素樹脂（以下、単に、ＰＴＦＥと称す。）からなるものであって、図１に示す装着状態では、全体としてＬ字状をなし、外周側挟持部２２と内周側挟持部３２との間に挟持される基端４１と、弁軸５３の外周面５３ａに摺動自在に接触し、後述する差込部３４に差し込まれる先端縁４２とを備える。   The seal lip 40 is made of a fluororesin (hereinafter simply referred to as PTFE) such as polytetrafluoroethylene which is chemically stable and excellent in heat resistance and chemical resistance, and is in the mounted state shown in FIG. Then, it is L-shaped as a whole, slidably comes into contact with the base end 41 sandwiched between the outer circumferential side clamping unit 22 and the inner circumferential side clamping unit 32, and the outer circumferential surface 53a of the valve shaft 53. And a leading edge 42 to be inserted into the insertion portion 34.

上記構成の密封装置１０は、外周側金属環２０における折り曲げ部２３と内周側金属環３０における内周側金属環本体３１の密封対象側Ａの端部が金属嵌合し、かつ、外周側挟持部２２と内周側挟持部３２がシールリップ４０の基端４１を介して固定される。換言すれば、シールリップ４０の基端４１は、外周側挟持部２２と内周側挟持部３２との間で挟持されることにより固定されている。   In the sealing device 10 having the above configuration, the bent portion 23 in the outer peripheral side metal ring 20 and the end of the inner peripheral side metal ring main body 31 in the inner peripheral side metal ring body 31 on the sealing target side A are metal-fitted, and the outer peripheral side The clamping part 22 and the inner circumferential side clamping part 32 are fixed via the base end 41 of the seal lip 40. In other words, the base end 41 of the seal lip 40 is fixed by being clamped between the outer circumferential side clamping unit 22 and the inner circumferential side clamping unit 32.

そして、シールリップ４０の先端縁４２を差込部３４の内面に差し込む（軸方向に差し込む）ことによって、図２に示すように、シールリップ４０の外周面４３と差込部３４の円筒面３４ｃとの間に軸方向に延びる隙間ｃ１が設定され、シールリップ４０の先端縁４２における先端面４４と差込部３４の端面３４ｂとの間に径方向に延びる隙間ｃ２が設定される。   Then, by inserting the tip edge 42 of the seal lip 40 into the inner surface of the insertion portion 34 (in the axial direction), as shown in FIG. 2, the outer peripheral surface 43 of the seal lip 40 and the cylindrical surface 34c of the insertion portion 34 are inserted. A gap c1 extending in the axial direction is set between the front end edge 42 of the seal lip 40 and a gap c2 extending in the radial direction is set between the end face 34b of the insertion portion 34.

以上により、本実施形態に係る密封装置によれば、差込部３４（フランジ部３３）の内周面３４ａと弁軸５３の外周面５３ａとの間には、微小の隙間ｃ３が設定されているとともに、シールリップ４０の外周面４３と差込部３４の円筒面３４ｃとの間に軸方向の隙間ｃ１が、シールリップ４０の先端縁４２における先端面４４と差込部３４の端面３４ｂとの間に径方向の隙間ｃ２が設定される。したがって、密封対象側Ａから侵入しようとしてくる煤等の侵入を防止することができる。しかも、本実施形態に係る隙間ｃ１、ｃ２、ｃ３は、それぞれが交互に軸方向及び径方向へ延びるものであるため、煤等は隙間ｃ１、ｃ２、ｃ３を交互に乗り越えなければならない。したがって、密封対象側Ａから侵入しようとしてくる煤等の侵入がより困難なものとなるため、煤等の侵入をより効率よく防止することができる。   As described above, according to the sealing device according to the present embodiment, the minute gap c <b> 3 is set between the inner peripheral surface 34 a of the insertion portion 34 (flange portion 33) and the outer peripheral surface 53 a of the valve shaft 53. In addition, an axial gap c1 is formed between the outer peripheral surface 43 of the seal lip 40 and the cylindrical surface 34c of the insertion portion 34, so that the distal end surface 44 at the distal end edge 42 of the seal lip 40 and the end surface 34b of the insertion portion 34 are separated. A radial gap c2 is set between the two. Accordingly, it is possible to prevent intrusion of a bag or the like that is about to enter from the sealing target side A. Moreover, since the gaps c1, c2, and c3 according to the present embodiment extend alternately in the axial direction and the radial direction, the hooks and the like must get over the gaps c1, c2, and c3 alternately. Accordingly, since it becomes more difficult for the soot to enter from the sealing target side A, the intrusion of the soot or the like can be prevented more efficiently.

また、本実施形態に係る密封装置１０によれば、内周側金属環３０は、シールリップ４０の基端４１を保持する役割と、シールリップ４０の先端縁４２及び外周面４３との間に微小の隙間（ラビリンス）ｃを設定する役割を兼ねる。したがって、図５に示す従来技術に係る密封装置１０から部品点数を増やす必要がない。   Further, according to the sealing device 10 according to the present embodiment, the inner peripheral side metal ring 30 is interposed between the role of holding the base end 41 of the seal lip 40 and the front edge 42 and the outer peripheral surface 43 of the seal lip 40. It also serves to set a minute gap (labyrinth) c. Therefore, it is not necessary to increase the number of parts from the sealing device 10 according to the prior art shown in FIG.

１０ 密封装置
２０ 外周側金属環
２１ 外周側金属環本体
２２ 外周側挟持部
２３ 折り曲げ部
３０ 内周側金属環
３１ 内周側金属環本体
３２ 内周側挟持部
３３ フランジ部
３４ 差込部
３４ａ 内周面
３４ｂ 端面
３４ｃ 円筒面
４０ シールリップ
４１ 基端
４２ 先端縁
４３ 外周面
４４ 先端面
５０ バタフライバルブ
５１ 筒状部材
５１ａ 流路
５２ ハウジング
５２ａ 軸孔
５２ｂ 軸孔内周
５２ｃ 内周面
５３ 弁軸
５３ａ 外周面
５４ 弁体
Ａ 密封対象側
Ｂ 反密封対象側
ｃ，ｃ１，ｃ２，ｃ３ 隙間
DESCRIPTION OF SYMBOLS 10 Sealing device 20 Outer peripheral side metal ring 21 Outer peripheral side metal ring main body 22 Outer peripheral side clamping part 23 Bending part 30 Inner peripheral side metal ring 31 Inner peripheral side metal ring main body 32 Inner peripheral side clamping part 33 Flange part 34 Insertion part 34a In Peripheral surface 34b End surface 34c Cylindrical surface 40 Seal lip 41 Base end 42 Front end edge 43 Outer peripheral surface 44 Front end surface 50 Butterfly valve 51 Cylindrical member 51a Flow path 52 Housing 52a Shaft hole 52b Shaft hole inner periphery 52c Inner peripheral surface 53 Valve shaft 53a Outer peripheral surface 54 Valve body A Sealing target side B Anti-sealing target side c, c1, c2, c3 Clearance

Claims (3)

ハウジングの内周面に嵌合する金属環と、前記金属環の一方の端部から延びることで、前記ハウジングの軸孔内周に挿通された軸の外周面に摺動自在に接触するシールリップと、を備えた密封装置において、
前記金属環は、軸と同心状の金属環本体と、この金属環本体の他方の端部から内径方向にむけて延在するフランジ部と、からなり、
前記フランジ部の内周面と、前記軸の外周面との間には、ラビリンスが形成されていることを特徴とする密封装置。 A metal ring that fits to the inner peripheral surface of the housing, and a seal lip that slidably contacts the outer peripheral surface of the shaft that is inserted into the inner periphery of the shaft hole of the housing by extending from one end of the metal ring And a sealing device comprising:
The metal ring is composed of a metal ring main body concentric with the shaft, and a flange portion extending from the other end of the metal ring main body toward the inner diameter direction,
A labyrinth is formed between an inner peripheral surface of the flange portion and an outer peripheral surface of the shaft. 請求項１に記載の密封装置において、
前記フランジ部の内周側端部には、前記フランジ部の軸方向幅が長大となるクランク状の差込部が形成され、前記シールリップの先端縁が前記差込部へ差し込まれることで、前記差込部の内面と、前記シールリップの外周面及び先端面との間には、ラビリンスが形成されていることを特徴とする密封装置。 The sealing device according to claim 1,
A crank-shaped insertion part in which the axial width of the flange part is long is formed at the inner peripheral side end of the flange part, and the leading edge of the seal lip is inserted into the insertion part. A labyrinth is formed between an inner surface of the insertion portion and an outer peripheral surface and a front end surface of the seal lip. 請求項１または２に記載の密封装置において、
前記シールリップは、ポリテトラフルオロエチレンからなり、
前記密封装置は、バタフライバルブ用のオイルシールであることを特徴とする密封装置。 The sealing device according to claim 1 or 2,
The seal lip is made of polytetrafluoroethylene,
The sealing device is an oil seal for a butterfly valve.
JP2016088103A 2016-04-26 2016-04-26 Sealing device Pending JP2017198256A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019033754A (en) * 2010-09-21 2019-03-07 アルター・バイオサイエンス・コーポレーション Multimeric il-15 fusion molecules and methods of making and using thereof

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Publication number Priority date Publication date Assignee Title
JPH0177169U (en) * 1987-11-12 1989-05-24
JP2001304424A (en) * 2000-04-27 2001-10-31 Nsk Ltd Sealing device for axle supporting bearing of rolling stock
JP2007032301A (en) * 2005-07-22 2007-02-08 Taiho Kogyo Co Ltd Valve assembly
JP2007270873A (en) * 2006-03-30 2007-10-18 Jtekt Corp Sealing device
JP2010065729A (en) * 2008-09-09 2010-03-25 Nok Corp Sealing device and method of mounting the same
JP2010091036A (en) * 2008-10-09 2010-04-22 Jtekt Corp Rolling bearing device
WO2016051879A1 (en) * 2014-09-30 2016-04-07 株式会社テージーケー Butterfly valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0177169U (en) * 1987-11-12 1989-05-24
JP2001304424A (en) * 2000-04-27 2001-10-31 Nsk Ltd Sealing device for axle supporting bearing of rolling stock
JP2007032301A (en) * 2005-07-22 2007-02-08 Taiho Kogyo Co Ltd Valve assembly
JP2007270873A (en) * 2006-03-30 2007-10-18 Jtekt Corp Sealing device
JP2010065729A (en) * 2008-09-09 2010-03-25 Nok Corp Sealing device and method of mounting the same
JP2010091036A (en) * 2008-10-09 2010-04-22 Jtekt Corp Rolling bearing device
WO2016051879A1 (en) * 2014-09-30 2016-04-07 株式会社テージーケー Butterfly valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019033754A (en) * 2010-09-21 2019-03-07 アルター・バイオサイエンス・コーポレーション Multimeric il-15 fusion molecules and methods of making and using thereof

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