JPH1163241A - Rotation seal - Google Patents
Rotation sealInfo
- Publication number
- JPH1163241A JPH1163241A JP9247730A JP24773097A JPH1163241A JP H1163241 A JPH1163241 A JP H1163241A JP 9247730 A JP9247730 A JP 9247730A JP 24773097 A JP24773097 A JP 24773097A JP H1163241 A JPH1163241 A JP H1163241A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- lip
- lip portion
- seal element
- storage chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転軸に使用され
るシール、特に、カーエアコン用コンプレッサー等、高
圧流体を密封する場合に適用されるシールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal used for a rotating shaft, and more particularly to a seal used for sealing a high-pressure fluid such as a compressor for a car air conditioner.
【０００２】[0002]
【従来の技術】この種のシールとしては、図４（イ）
（ロ）に示すように、ゴム製のシール部材ａと、ふっ素
系樹脂、例えば、ＰＴＦＥのシールエレメントｂ，ｂを
備えたものがあり、この場合、該シール部材ａのリップ
部ｃがシールエレメントｂのリップ部ｄより流体収納室
側（高圧側）に配設されていた。即ち、シール部材ａ
は、筒状の金属製保持部材ｅにて保持され、この保持部
材ｅに、シールエレメントｂや押え金具ｆ，ｇ，ｈ等が
内嵌されている。また、保持部材ｅは、筒状本体部ｉ
と、該筒状本体部ｉの端部に連設される内鍔部ｊ，ｋと
からなり、シール部材ａのリップ部ｃには対応していな
かった。2. Description of the Related Art As this kind of seal, FIG.
As shown in (b), there is provided a seal member a made of rubber and a seal member b made of a fluorine-based resin, for example, PTFE. In this case, the lip c of the seal member a is It was arranged on the fluid storage chamber side (high pressure side) from the lip part d of b. That is, the sealing member a
Is held by a cylindrical metal holding member e, on which a sealing element b, holding members f, g, h, etc. are fitted. Further, the holding member e is a cylindrical main body i
And inner flanges j and k provided continuously with the end of the cylindrical main body i, and did not correspond to the lip c of the seal member a.
【０００３】[0003]
【発明が解決しようとする課題】従って、このような回
転用シールでは、シール部材ａのリップ部ｃに高圧（１
ＭＰａ（10kgf/cm2 以上）がかかれば、このリップ部ｃ
が圧力により押しつぶされた形となる（リップ部ｃ先端
が軸にいわゆるベタあたりする）。そのため、リップ部
ｃの変形、摩耗等により、耐久性が良くなかった。Therefore, in such a rotary seal, the high pressure (1) is applied to the lip c of the seal member a.
If mp (10kgf / cm 2 or more) is applied, this lip c
Is crushed by pressure (the tip of the lip portion c is so-called solid on the shaft). Therefore, the durability was not good due to the deformation, wear, etc. of the lip portion c.
【０００４】さらに、このシールでは、流体が高圧の冷
媒の場合、シール部材ａのリップ部ｃと、該シール部材
ａ側のシールエレメントｂのリップ部ｄ間に浸透した冷
媒が高温時に発泡し、図４（ロ）に示すように、該シー
ルエレメントｂが矢印のように内径側に押し出され、該
シールエレメントｂの抜けが発生する虞があった。Further, in this seal, when the fluid is a high-pressure refrigerant, the refrigerant that has permeated between the lip c of the seal member a and the lip d of the seal element b on the seal member a foams at a high temperature, As shown in FIG. 4B, the seal element b is pushed out to the inner diameter side as indicated by an arrow, and there is a possibility that the seal element b may come off.
【０００５】また、シール部材よりシールエレメントを
流体収納室側（高圧側）に配設することも可能である。
しかしながら、この場合、圧力によるシール部材のリッ
プ部（ゴムリップ部）の変形は小さいが、シールエレメ
ントのリップ部（ＰＴＦＥリップ部）でオイル等がシー
ルされるため、ゴムリップ部が無潤滑に近い状態にな
り、摩耗やクラック等が発生して耐久性に影響を与えて
いた。[0005] It is also possible to dispose the seal element on the fluid storage chamber side (high pressure side) from the seal member.
However, in this case, although the deformation of the lip portion (rubber lip portion) of the seal member due to the pressure is small, oil or the like is sealed by the lip portion (PTFE lip portion) of the seal element, so that the rubber lip portion is almost in a non-lubricated state. Wear, cracks, etc., affecting durability.
【０００６】そこで、本発明は、耐久性に優れると共
に、シールエレメントの抜けを有効に防止できる回転用
シールを提供することを目的とする。Accordingly, an object of the present invention is to provide a rotary seal which has excellent durability and which can effectively prevent the sealing element from coming off.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するために、ハウジングと回転軸部材の間に介装さ
れ、かつ、該回転軸部材の外周面に摺接するリップ部を
有するシールエレメントと、該シールエレメントのリッ
プ部より流体収納室側に配設されて上記回転軸部材の外
周面に略線接触状に摺接するリップ部と該シールエレメ
ントの流体収納室側の端面に密着するエレメント圧接片
部と上記ハウジング内面に密接する外周当接片部とを有
するゴム製シール部材と、を備えた回転用シールであっ
て、上記シール部材を、低圧側からそのリップ部まで延
伸してそのリップ部対応部が該リップ部に内装状となる
金属製環状保持部材にて保持させると共に、上記シール
エレメントを該保持部材に内嵌状としたものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a seal interposed between a housing and a rotating shaft member and having a lip portion which slides on an outer peripheral surface of the rotating shaft member. An element, a lip disposed closer to the fluid storage chamber than the lip of the seal element, and slidably in substantially linear contact with the outer peripheral surface of the rotary shaft member; and an end face of the seal element on the fluid storage chamber side. A rubber seal member having an element pressure contact piece portion and an outer peripheral contact piece portion closely contacting the inner surface of the housing, and a rotary seal including the seal member, extending from the low pressure side to its lip portion. The lip portion-corresponding portion is held by the lip portion with a metal annular holding member having an interior shape, and the seal element is fitted inside the holding member.
【０００８】この際、シールエレメントの外周に流体が
低圧側に逃げるノッチを設けるも好ましく、また、金属
製環状保持部材のリップ部対応部が上記ゴム製シール部
材のリップ部の径方向の僅かな弾性変形を許容するのが
好ましい。In this case, it is preferable to provide a notch on the outer periphery of the seal element to allow the fluid to escape to the low pressure side, and that a portion corresponding to the lip portion of the metal annular holding member has a slight diameter in the radial direction of the lip portion of the rubber seal member. It is preferable to allow elastic deformation.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳説する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１０】図１は本発明に係る回転用シールを示し、
例えばカーエアコンのコンプレッサーに使用される。こ
の回転用シールは、コンプレッサーのケース等のハウジ
ング２と、所定方向に回転する回転軸部材３の間に介装
され、流体収納室５内の液体や気体の流体を密封する。FIG. 1 shows a rotary seal according to the present invention,
For example, it is used for compressors of car air conditioners. The rotary seal is interposed between a housing 2 such as a compressor case and a rotary shaft member 3 rotating in a predetermined direction, and seals a liquid or gas fluid in the fluid storage chamber 5.
【００１１】しかして、この回転用シールは、ふっ素系
樹脂、例えば、ＰＴＦＥからなる一対のシールエレメン
ト６，７と、ゴム製シール部材８と、を備え、金属製環
状保持部材13に装着（付設）される。なお、この保持部
材13の材質としては、鋼やアルミニウム等である。各シ
ールエレメント６，７は、平板リング部９，10と、該平
板リング部９，10の内周縁部から突設されるリップ部1
1，12と、からなり、各リップ部11，12には、溝Ｍが形
成されている。また、各リップ部11，12は、低圧21側か
ら高圧側（流体収納室５側）に向かって順次縮径してい
る。なお、各リップ部11，12に形成される溝Ｍとして
は、螺旋状（この場合、等間隔であっても不等間隔であ
ってもよい。）に形成するも、等間隔又は不等間隔のピ
ッチで同心円状に複数本形成するも自由である。また、
溝Ｍは、リップ部11，12に対して傾斜状とされる。The rotary seal includes a pair of seal elements 6 and 7 made of a fluororesin, for example, PTFE, and a rubber seal member 8, and is mounted (attached) to the metal annular holding member 13. ) Is done. The material of the holding member 13 is steel, aluminum, or the like. Each of the seal elements 6 and 7 has a flat plate ring portion 9 and 10 and a lip portion 1 protruding from an inner peripheral edge of the flat plate ring portion 9 and 10.
The lip portions 11 and 12 have grooves M formed therein. The diameter of each of the lip portions 11 and 12 is gradually reduced from the low pressure 21 side to the high pressure side (the fluid storage chamber 5 side). The grooves M formed in the lip portions 11 and 12 may be formed in a spiral shape (in this case, they may be formed at equal intervals or at irregular intervals), but may be formed at equal intervals or at irregular intervals. It is also possible to form a plurality of concentric circles at the pitch described above. Also,
The groove M is inclined with respect to the lips 11, 12.
【００１２】金属製環状保持部材13は、大径部14と、小
径部15と、大径部14と小径部15とを連結する連結部16
と、を備え、また、大径部14の低圧21側の端部に、内鍔
部17が設けられている。The metal annular holding member 13 includes a large-diameter portion 14, a small-diameter portion 15, and a connecting portion 16 for connecting the large-diameter portion 14 and the small-diameter portion 15.
The inner flange portion 17 is provided at an end of the large diameter portion 14 on the low pressure 21 side.
【００１３】また、ゴム製シール部材８は、回転軸部材
３の外周面４に略線接触状に摺接するリップ部18とシー
ルエレメント７の流体収納室５側の端面28に密着するエ
レメント圧接片部19とハウジング内面２ａに密接する外
周当接片部20とを有する。The rubber seal member 8 has a lip portion 18 that slides substantially in line contact with the outer peripheral surface 4 of the rotary shaft member 3 and an element pressure contact piece that is in close contact with the end surface 28 of the seal element 7 on the fluid storage chamber 5 side. It has a portion 19 and an outer peripheral contact piece 20 which is in close contact with the inner surface 2a of the housing.
【００１４】即ち、リップ部18は、基部18ａと、低圧21
側から高圧側（流体収納室５側）に向かって順次縮径す
る先端部18ｂと、からなり、先端部18ｂに、内径方向に
突出して回転軸部材３の外周面４に略線状に摺接する尖
鋭状内周突条部23が形成されている。また、エレメント
圧接片部19は、リップ部18の基部18ａから外径方向に延
伸し、該リップ部18と外周当接片部20とを一体連設して
いる。そして、エレメント圧接片部19の低圧21側の端面
24には、凹凸部25が形成されると共に、外周当接片部20
の外周面26に凹凸波部27が形成されている。That is, the lip portion 18 has a base portion 18a and a low pressure 21
And a distal end portion 18b whose diameter gradually decreases from the side toward the high pressure side (the fluid storage chamber 5 side). The distal end portion 18b protrudes in the inner diameter direction and slides substantially linearly on the outer peripheral surface 4 of the rotary shaft member 3. A sharp inner peripheral protruding ridge portion 23 that is in contact is formed. Further, the element pressure contact piece 19 extends in the outer radial direction from the base 18a of the lip 18, and the lip 18 and the outer peripheral contact piece 20 are integrally connected. Then, the end face of the element pressure contact piece portion 19 on the low pressure 21 side
24, an uneven portion 25 is formed, and an outer peripheral contact piece portion 20 is formed.
An uneven wave portion 27 is formed on an outer peripheral surface 26 of the light emitting device.
【００１５】ところで、金属製環状保持部材13は、その
連結部16がシール部材８のエレメント圧接片部19に内装
状とされ、その小径部15がシール部材８のリップ部18の
基部18ａに内装状とされる。即ち、この保持部材13は、
低圧21側からリップ部18の基部18ａまで延伸し、大径部
14は、（圧接片部19側の一部を省いて）その内周面が、
シール部材８から露出している。The metallic annular holding member 13 has a connecting portion 16 formed inside the element pressure contact piece 19 of the sealing member 8 and a small diameter portion 15 formed inside the base 18a of the lip 18 of the sealing member 8. State. That is, the holding member 13
It extends from the low pressure 21 side to the base 18a of the lip 18
14 has an inner peripheral surface (omitting a part of the pressure contact piece 19 side)
It is exposed from the seal member 8.
【００１６】そして、シール部材８が取り付けられた状
態の保持部材13の大径部14に、シールエレメント６，７
が内嵌される。この際、内鍔部17とシールエレメント６
との間に、押え金具30が介装され、シールエレメント
６，７間に、押え金具31，32が介装されている。即ち、
押え金具30は、断面略Ｌ字状の筒状体からなり、その端
縁33が内鍔部17に当接乃至圧接し、押え金具31は、平板
リング体からなり、押え金具30の流体収納室５側の端面
34とでシールエレメント６の平板リング部９を挾持して
いる。また、押え金具32は、断面略Ｌ字状の筒状体から
なり、その端縁35が押え金具31に当接乃至圧接し、その
流体収納室５側の端面36と、シール部材８の圧接片部19
とで、シールエレメント７の平板リング部10を挾持して
いる。The large diameter portion 14 of the holding member 13 to which the sealing member 8 is attached is provided with the sealing elements 6 and 7.
Is fitted inside. At this time, the inner flange portion 17 and the seal element 6
, A press fitting 30 is interposed, and press fittings 31, 32 are interposed between the seal elements 6, 7. That is,
The presser fitting 30 is formed of a cylindrical body having a substantially L-shaped cross section, and its edge 33 abuts or presses against the inner flange portion 17. The presser fitting 31 is formed of a flat plate ring body. End face of room 5
34 sandwich the flat plate ring portion 9 of the seal element 6. The holding member 32 is formed of a cylindrical body having a substantially L-shaped cross section, and its edge 35 abuts or presses against the holding member 31, and presses the end surface 36 of the fluid storage chamber 5 side against the sealing member 8. One part 19
Thus, the flat plate ring portion 10 of the seal element 7 is sandwiched.
【００１７】しかして、シールエレメント７の外周側、
具体的には、平板リング部10の外周面40には、図２に示
すような半円状のノッチ41が、例えば、周方向に約90°
ピッチで配設される。このノッチ41は、シール部材８と
シールエレメント７との間に浸透した冷媒等を、低圧21
側へ逃がす役割を果たし、該シールエレメント７に、縮
径する方向の力が作用して、抜けが発生することを有効
に防止している。Thus, on the outer peripheral side of the seal element 7,
Specifically, a semicircular notch 41 as shown in FIG. 2 is formed on the outer peripheral surface 40 of the flat plate ring portion 10 by, for example, about 90 ° in the circumferential direction.
Arranged at pitch. The notch 41 allows the refrigerant or the like that has permeated between the seal member 8 and the seal
It plays a role of escaping to the side, and effectively prevents the sealing element 7 from being disengaged by a force in the direction of reducing the diameter.
【００１８】ところで、保持部材13は、その小径部15、
つまり、リップ部対応部の肉厚Ａ′を他の部位の肉厚Ａ
より小としている。即ち、リップ部対応部においては、
リップ部18の径方向の僅かな弾性変形を許容する必要が
あり、その肉厚Ａ′を小とし、他の部位では、シール部
材８とシールエレメント６，７を保持する必要があり、
その肉厚Ａを大とする。Incidentally, the holding member 13 has a small diameter portion 15,
That is, the thickness A 'of the lip corresponding portion is changed to the thickness A of the other portion.
It is smaller. That is, in the lip corresponding portion,
It is necessary to allow a slight elastic deformation in the radial direction of the lip portion 18, to reduce its thickness A ', and to hold the sealing member 8 and the sealing elements 6, 7 in other portions.
The thickness A is increased.
【００１９】具体的には、この肉厚Ａ′は、この回転用
シールが装着される部位、リップ部18の傾斜角度θ（回
転軸部材３の軸心方向に対する角度）、保持部材13の材
質や該保持部材13のリップ部対応部の軸方向長さＢ等に
て相違するが、例えば、保持部材13の材質を鋼とした場
合、Ａ′＝（１／４〜１）×Ａとし、好ましくは、Ａ′
＝1/2 Ａとし、Ｂ＝（1.5 〜３）×Ａ′とする。要は、
リップ部対応部にてリップ部18が補強されて圧力による
このリップ部18の押しつぶれをなくす、つまり、リップ
部18の先端の軸へのベタあたりを防止すると共に、該リ
ップ部18が軸装着時に多少拡径して軸装着が容易となる
程度のフレキシビリティを有するものとなればよい。More specifically, the thickness A ′ is determined by the position where the rotary seal is mounted, the inclination angle θ of the lip 18 (the angle with respect to the axial direction of the rotary shaft member 3), and the material of the holding member 13. And the length B in the axial direction of the lip corresponding portion of the holding member 13 is different. For example, when the material of the holding member 13 is steel, A ′ = (1/4 to 1) × A, Preferably, A '
= 1/2 A, and B = (1.5-3) × A '. In short,
The lip portion 18 is reinforced at the lip portion corresponding portion to eliminate the crushing of the lip portion 18 due to pressure, that is, to prevent the tip of the lip portion 18 from contacting the shaft with the shaft and mounting the lip portion 18 on the shaft What is necessary is to have a degree of flexibility such that the diameter of the shaft is sometimes slightly increased to facilitate mounting of the shaft.
【００２０】従って、リップ部18は保持部材13の小径部
15にて補強され、流体収納室５側からの圧力（例えば、
１ＭＰａ（10kgf/cm2 ）以上）にて、突条部23が回転軸
部材３に押しつぶされた状態（いわゆるベタあたり）に
なるのを有効に防止し、安定したシール機能を発揮す
る。しかも、該リップ部18にはある程度のフレキシビリ
ティを持たせることができ、軸装着時に多少拡径して、
装着作業が容易となる。Therefore, the lip portion 18 is a small diameter portion of the holding member 13.
15, the pressure from the fluid storage chamber 5 side (for example,
At 1 MPa (10 kgf / cm 2 or more), the ridge 23 is effectively prevented from being crushed by the rotary shaft member 3 (so-called solid contact), and a stable sealing function is exhibited. In addition, the lip portion 18 can have a certain degree of flexibility, and when the shaft is mounted, the diameter increases somewhat,
Mounting work becomes easy.
【００２１】ところで、このシールが装着された際に
は、凹凸部25がシールエレメント７の平板リング部10の
流体収納室５側の端面28に圧接して密着すると共に、該
凹凸波部27がハウジング２の内面２ａに圧接して密着
し、また、シール部材８のリップ部18と、シールエレメ
ント６，７のリップ部11，12とが、回転軸部材３の外周
面４に圧接し、優れたシール性を発揮する。By the way, when the seal is mounted, the uneven portion 25 is brought into pressure contact with the end surface 28 of the flat plate ring portion 10 of the seal element 7 on the side of the fluid storage chamber 5 and the uneven wave portion 27 is pressed. The lip portion 18 of the seal member 8 and the lip portions 11 and 12 of the seal elements 6 and 7 are in pressure contact with the outer peripheral surface 4 of the rotary shaft member 3 by pressing against the inner surface 2 a of the housing 2. Demonstrates excellent sealing properties.
【００２２】具体的には、シールエレメント６，７にお
いては、そのリップ部11，12の摺接面が回転軸部材３の
外周面４に圧接すると、溝Ｍは、その断面形状が鋭角三
角形状に拡開し、溝Ｍは、その開口部から底部に向かっ
て低圧21側に傾斜する。このため、リップ部11，12の摺
接面による回転軸部材３上の接触面圧は、尖鋭状とな
り、低圧21側への流体の浸入を確実に防止する。Specifically, in the seal elements 6 and 7, when the sliding surfaces of the lip portions 11 and 12 are pressed against the outer peripheral surface 4 of the rotary shaft member 3, the groove M has an acute triangular cross section. The groove M is inclined toward the low pressure 21 from the opening to the bottom. For this reason, the contact surface pressure on the rotating shaft member 3 due to the sliding contact surfaces of the lip portions 11 and 12 becomes sharp, and the intrusion of the fluid into the low pressure 21 side is reliably prevented.
【００２３】また、溝Ｍが螺旋状であれば、回転軸部材
３が（高速）回転すると、流体が溝Ｍに浸入しても、流
体の粘性による連れ廻り回転流を、低圧21側から流体収
納室５方向へ発生させて押戻すようにすることができ、
これにより、低圧21側への流体の漏れを確実に防止でき
る。即ち、いわゆるスクリューによるポンピング作用に
より流体を押戻すように設定できる。If the groove M is helical, when the rotary shaft member 3 rotates (at high speed), even if the fluid enters the groove M, the entrained rotational flow due to the viscosity of the fluid is transmitted from the low pressure 21 side. It can be generated in the direction of the storage room 5 and pushed back,
Thereby, leakage of fluid to the low pressure 21 side can be reliably prevented. That is, it can be set so that the fluid is pushed back by the pumping action of a so-called screw.
【００２４】しかも、上述の如く、リップ部18の突条部
23が、回転軸部材３の外周面４に線接触状に弾性圧接
（密接）すると共に、外周当接片部20の外周面26が、ハ
ウジング２の内面２ａに弾性圧接（密接）して、回転軸
部材３が静止した状態においても、流体収納室５から低
圧21側への流体の浸入を確実に防止できる。さらに、エ
レメント圧接片部19の端面24がシールエレメント７の端
面28に弾性圧接（密接）するので、保持部材13の内面か
らの流体（特にガス）漏れを防止して、一層確実に流体
を密封することができる。Further, as described above, the ridges of the lip 18
23 is in elastic contact (close contact) with the outer peripheral surface 4 of the rotary shaft member 3 in line contact, and the outer peripheral surface 26 of the outer peripheral contact piece 20 is elastically press contact (close contact) with the inner surface 2a of the housing 2, Even when the rotating shaft member 3 is stationary, it is possible to reliably prevent the fluid from entering the low pressure 21 from the fluid storage chamber 5. Further, since the end face 24 of the element pressure contact piece 19 is elastically press-contacted (closely contact) with the end face 28 of the seal element 7, fluid (especially gas) leakage from the inner face of the holding member 13 is prevented, and the fluid is more securely sealed. can do.
【００２５】次に、図３は他の回転用シールを示し、こ
の場合、シールエレメント６が省略されている。具体的
には、図１に比べて、シールエレメント６と、押え金具
31，32とを省略したものであって、この場合でも、リッ
プ部18は保持部材13の小径部15にて補強され、流体収納
室５側からの圧力にて、突条部23が回転軸部材３に押し
つぶされた状態（いわゆるベタあたり）になるのを有効
に防止し、安定したシール機能を発揮する。しかも、該
リップ部18にはある程度のフレキシビリティを持たせる
ことができ、軸装着時に多少拡径して、装着作業が容易
となる。FIG. 3 shows another rotary seal, in which the seal element 6 is omitted. Specifically, as compared with FIG.
In this case, the lip portion 18 is reinforced by the small-diameter portion 15 of the holding member 13 and the ridge portion 23 is rotated by the pressure from the fluid storage chamber 5 side. It effectively prevents the state of being crushed by the member 3 (so-called solid contact) and exhibits a stable sealing function. Moreover, the lip portion 18 can have a certain degree of flexibility, and the diameter of the lip portion 18 is slightly increased when the shaft is mounted, so that the mounting operation is facilitated.
【００２６】なお、本発明に係る回転用シールのノッチ
41としては、その断面形状が半円形状のものに限らず、
半楕円形状や矩形状や台形状等の種々の形状とすること
ができ、さらに、ノッチ41の数としては、４個に限ら
ず、増減は自由であるが、ノッチ41の役割から周方向に
等間隔に配設するのが好ましい。また、一個のノッチ41
の大きさとしては、例えば、図２に示す断面形状である
場合に、半径ｒを 0.5〜３mm位に設定する。即ち、 0.5
mm未満では、小さすぎて浸透した冷媒等を低圧21側に逃
がしにくく、逆に３mmを越えれば、大きすぎてシールエ
レメント７の保持が安定しないからである。The notch of the rotary seal according to the present invention
For 41, the cross-sectional shape is not limited to a semicircular shape,
Various shapes such as a semi-elliptical shape, a rectangular shape, a trapezoidal shape, and the like can be used. Further, the number of the notches 41 is not limited to four, and can be freely increased or decreased. It is preferable to arrange them at equal intervals. Also, one notch 41
For example, in the case of the cross-sectional shape shown in FIG. 2, the radius r is set to about 0.5 to 3 mm. That is, 0.5
If it is less than mm, it is too small to allow the permeated refrigerant or the like to escape to the low pressure 21 side, and if it exceeds 3 mm, on the other hand, it is too large to hold the seal element 7 stably.
【００２７】[0027]
【発明の効果】本発明は上述の如く構成されているの
で、次に記載するような著大な効果を奏する。Since the present invention is configured as described above, the following significant effects can be obtained.
【００２８】請求項１によれば、シール部材８のリップ
部18がいわゆるベタあたりすることなく、回転軸部材３
の外周面４に線接触状となって長期に渡って安定したシ
ール性能を発揮する。According to the first aspect, the lip portion 18 of the seal member 8 does not hit the so-called solid portion, and the rotary shaft member 3
And is in line contact with the outer peripheral surface 4 of the substrate to exhibit stable sealing performance over a long period of time.
【００２９】請求項２によれば、上述の請求項１と同様
の効果を奏すると共に、カーエアコン用コンプレッサー
等に使用された場合において、シールエレメント７にま
で冷媒が浸透しても、該冷媒がノッチ41を介して低圧21
側に逃げ、該シールエレメント７には、縮径する方向の
力が作用せず、該シールエレメント７が抜け出ることが
なくなって、長期に渡って回転用シールとしての機能を
発揮する。According to the second aspect, the same effects as those of the first aspect are obtained, and when the refrigerant permeates the seal element 7 when used in a compressor for a car air conditioner or the like, the refrigerant does not Low pressure 21 through notch 41
The seal element 7 escapes to the side, and no force in the direction of reducing the diameter is applied to the seal element 7, so that the seal element 7 does not come off, and functions as a rotary seal for a long time.
【００３０】請求項３によれば、請求項１と同様の効果
を奏すると共に、シール部材８のリップ部18が、ある程
度のフレキシビリティを有し、装着時の作業性に優れ
る。According to the third aspect, the same effect as that of the first aspect is obtained, and the lip portion 18 of the seal member 8 has a certain degree of flexibility and is excellent in workability at the time of mounting.
【図１】本発明に係る回転用シールの断面図である。FIG. 1 is a sectional view of a rotary seal according to the present invention.
【図２】シールエレメントの要部側面図である。FIG. 2 is a side view of a main part of the seal element.
【図３】他の回転用シールの断面図である。FIG. 3 is a cross-sectional view of another rotating seal.
【図４】従来の回転用シールの断面図である。FIG. 4 is a sectional view of a conventional rotary seal.
２ ハウジング ２ａ 内面 ３ 回転軸部材 ４ 外周面 ５ 流体収納室 ７ シールエレメント ８ シール部材 12 リップ部 13 金属製環状保持部材 18 リップ部 19 エレント圧接片部 20 外周当接片部 28 端面 41 ノッチ Reference Signs List 2 Housing 2a Inner surface 3 Rotating shaft member 4 Outer peripheral surface 5 Fluid storage chamber 7 Seal element 8 Seal member 12 Lip portion 13 Metal annular holding member 18 Lip portion 19 Elent pressure contact piece 20 External contact piece 28 End face 41 Notch
Claims (3)
れ、かつ、該回転軸部材の外周面に摺接するリップ部を
有するシールエレメントと、該シールエレメントのリッ
プ部より流体収納室側に配設されて上記回転軸部材の外
周面に略線接触状に摺接するリップ部と該シールエレメ
ントの流体収納室側の端面に密着するエレメント圧接片
部と上記ハウジング内面に密接する外周当接片部とを有
するゴム製シール部材と、を備えた回転用シールであっ
て、上記シール部材を、低圧側からそのリップ部まで延
伸してそのリップ部対応部が該リップ部に内装状となる
金属製環状保持部材にて保持させると共に、上記シール
エレメントを該保持部材に内嵌状としたことを特徴とす
る回転用シール。A seal element interposed between the housing and the rotary shaft member and having a lip portion that slides on an outer peripheral surface of the rotary shaft member; and a seal element disposed closer to the fluid storage chamber than the lip portion of the seal element. A lip portion that is provided and slidably contacts the outer peripheral surface of the rotary shaft member in a substantially line contact manner, an element pressure contact piece that closely contacts an end surface of the seal element on the fluid storage chamber side, and an outer peripheral contact piece that closely contacts the inner surface of the housing. And a rubber seal member having a rubber seal member comprising: a metal seal member, wherein the seal member extends from the low pressure side to the lip portion, and the lip portion corresponds to the interior of the lip portion. A rotary seal, wherein the seal element is held by an annular holding member and the seal element is fitted inside the holding member.
圧側に逃げるノッチを設けた請求項１記載の回転用シー
ル。2. The rotary seal according to claim 1, wherein a notch is provided on an outer periphery of the seal element to allow fluid to escape to a low pressure side.
上記ゴム製シール部材のリップ部の径方向の僅かな弾性
変形を許容する請求項１記載の回転用シール。3. The rotary seal according to claim 1, wherein the lip portion corresponding portion of the metal annular holding member allows a slight elastic deformation in the radial direction of the lip portion of the rubber seal member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9247730A JPH1163241A (en) | 1997-08-27 | 1997-08-27 | Rotation seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9247730A JPH1163241A (en) | 1997-08-27 | 1997-08-27 | Rotation seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1163241A true JPH1163241A (en) | 1999-03-05 |
Family
ID=17167827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9247730A Pending JPH1163241A (en) | 1997-08-27 | 1997-08-27 | Rotation seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1163241A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001153232A (en) * | 1999-11-29 | 2001-06-08 | Mitsubishi Cable Ind Ltd | Rotating shaft seal |
| JP2004332866A (en) * | 2003-05-09 | 2004-11-25 | Mitsubishi Cable Ind Ltd | Rotating shaft seal |
-
1997
- 1997-08-27 JP JP9247730A patent/JPH1163241A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001153232A (en) * | 1999-11-29 | 2001-06-08 | Mitsubishi Cable Ind Ltd | Rotating shaft seal |
| JP2004332866A (en) * | 2003-05-09 | 2004-11-25 | Mitsubishi Cable Ind Ltd | Rotating shaft seal |
| JP4559038B2 (en) * | 2003-05-09 | 2010-10-06 | 三菱電線工業株式会社 | Rotating shaft seal |
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