JP3293074B2 - Lip type seal - Google Patents
Lip type sealInfo
- Publication number
- JP3293074B2 JP3293074B2 JP11969094A JP11969094A JP3293074B2 JP 3293074 B2 JP3293074 B2 JP 3293074B2 JP 11969094 A JP11969094 A JP 11969094A JP 11969094 A JP11969094 A JP 11969094A JP 3293074 B2 JP3293074 B2 JP 3293074B2
- Authority
- JP
- Japan
- Prior art keywords
- outer diameter
- lip
- lip member
- elastomer
- ring
- 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.)
- Expired - Lifetime
Links
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば冷房装置などの
冷凍機コンプレッサの回転軸周を密封するために設けら
れるリップ型シールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lip seal provided for sealing the periphery of a rotating shaft of a refrigerator compressor such as a cooling device.
【0002】[0002]
【従来の技術】冷凍機コンプレッサの回転軸周を密封す
るリップ型シールの典型的な従来例として、図3に示す
ように、金属製の外環10と、この外環10をインサー
ト部材として一部埋設した状態に加硫成形されたエラス
トマ製リップ部材20と、このエラストマ製リップ部材
20の背面に当接された合成樹脂製リップ部材30と、
更にこの合成樹脂製リップ部材30の背面を押さえる金
属製の内環40とを備えたものが周知である。外環10
の外周面は、エラストマ製リップ部20の外径部22に
連続して形成されたエラストマからなる圧着部23で被
覆されており、内環40は、エラストマ製リップ部材2
0から露出した外環10のカシメ部11に後端が当接支
持された外径筒状部41と、この外径筒状部41から内
径側へ延在されて合成樹脂製リップ部材30の背面に当
接された押さえ部42からなる断面略L字形を呈する。2. Description of the Related Art As a typical conventional example of a lip-type seal for sealing the circumference of a rotating shaft of a refrigerator compressor, as shown in FIG. 3, an outer ring 10 made of metal and this outer ring 10 is used as an insert member. An elastomer lip member 20 vulcanized and molded in a partially embedded state, a synthetic resin lip member 30 abutting on the back surface of the elastomer lip member 20,
Further, there is a well-known one provided with a metal inner ring 40 for holding the back surface of the synthetic resin lip member 30. Outer ring 10
Is covered with a crimping portion 23 made of an elastomer formed continuously with the outer diameter portion 22 of the elastomer lip portion 20, and the inner ring 40 is made of an elastomer lip member 2.
An outer diameter cylindrical portion 41 whose rear end is supported by the caulking portion 11 of the outer ring 10 exposed from 0, and a synthetic resin lip member 30 extending from the outer diameter cylindrical portion 41 to the inner diameter side. It has a substantially L-shaped cross section composed of the holding portion 42 abutting on the back surface.
【0003】すなわちこのリップ型シールは、外環10
がエラストマからなる圧着部23を介して、軸封部ハウ
ジング1の軸孔1aに、この軸孔1aに形成された段差
部1bと止め輪2によって軸方向の移動が規制された状
態で圧入装着され、密封空間である機内A側へ湾曲して
延びるエラストマ製リップ部材20の内径部21の先端
に形成されたヘッド21aが、前記軸孔1aに挿通され
たシャフト3の外周面と摺接することによって、機内A
で圧縮されるCFC−12あるいはHFC−134a等
の冷媒及び冷凍機油が軸周から反密封空間である大気B
中へ漏れるのを阻止するものである。合成樹脂製リップ
部材30は、機内A側へ向けて湾曲して延びる内径部3
1の先端31aが、エラストマ製リップ部材20の内径
部21の内周側からヘッド21a近傍に達し、機内Aの
圧力を受けるこのエラストマ製リップ部材20の内径部
21を内周側から支承している。[0003] That is, this lip-type seal is
Is press-fitted into the shaft hole 1a of the shaft sealing housing 1 via the crimping portion 23 made of an elastomer while the movement in the axial direction is regulated by the stepped portion 1b formed in the shaft hole 1a and the retaining ring 2. The head 21a formed at the tip of the inner diameter portion 21 of the elastomeric lip member 20 that curves and extends toward the inside A of the machine, which is a sealed space, slides on the outer peripheral surface of the shaft 3 inserted into the shaft hole 1a. In-flight A
A refrigerant such as CFC-12 or HFC-134a and refrigeration oil which are compressed in the atmosphere B
It prevents leakage inside. The lip member 30 made of synthetic resin has an inner diameter portion 3 which extends toward the inside A of the machine.
The front end 31a of the first lip member 20 reaches the vicinity of the head 21a from the inner peripheral side of the inner diameter portion 21 of the elastomer lip member 20, and supports the inner diameter portion 21 of the elastomer lip member 20 receiving the pressure in the machine A from the inner peripheral side. I have.
【0004】なお、文中において「背面」とは密封空間
である機内Aと反対側(大気B側)を向いた面のことを
言い、また、「先端」とは機内A側の端部を言い、更に
「後端」とは機内Aと反対側の端部を言う。[0004] In the following description, the term "rear surface" refers to a surface facing the opposite side (atmosphere B side) of the cabin A, which is a sealed space, and the "tip" refers to the end of the cabin A side. Further, the “rear end” means an end opposite to the inside of the aircraft A.
【0005】[0005]
【発明が解決しようとする課題】上記従来例のリップ型
シールには、次のような問題が指摘される。すなわち、
機内Aで圧縮されるCFC−12あるいはHFC−13
4a等の冷媒は、エラストマ製リップ部材20を膨潤し
て僅かに透過する。但しその透過量は極めて微量であ
り、それ自体が問題となるほどの漏れとして認められる
ものではないが、この透過した冷媒の一部は、外環10
と、エラストマ製リップ部材20の外径部22と、合成
樹脂製リップ部材30の外径部32と、内環40の外径
筒状部41とで密閉された間隙Gに溜るため、高速運転
等によってこのリップ型シールの雰囲気温度が比較的高
温になった場合、冷媒の気化あるいは膨張によって間隙
Gの圧力が急激に上昇する。したがって、図4に示すよ
うに、間隙Gの圧力によって合成樹脂製リップ部材30
の外径部32が内径方向へ押し出され、これに伴い合成
樹脂製リップ部材30の内径部31が機内A側へ向けて
移動されて、その先端31aがエラストマ製リップ部材
20のヘッド21aを内周から押し広げるので、シャフ
ト3の外周面に対してヘッド21aの密接力が低下もし
くは非接触状態になり、漏れの発生に到ることがある。The following problems are pointed out in the above-mentioned conventional lip-type seal. That is,
CFC-12 or HFC-13 compressed in the cabin A
Refrigerant such as 4a swells and slightly permeates the lip member 20 made of elastomer. However, the amount of the permeated refrigerant is extremely small and is not recognized as a leak that causes a problem.
High-speed operation because the outer diameter portion 22 of the elastomer lip member 20, the outer diameter portion 32 of the synthetic resin lip member 30, and the outer diameter cylindrical portion 41 of the inner ring 40 accumulate in the gap G. When the ambient temperature of the lip-type seal becomes relatively high due to, for example, the pressure of the gap G sharply increases due to the vaporization or expansion of the refrigerant. Therefore, as shown in FIG.
Of the synthetic resin lip member 30 is moved toward the in-machine A side, and the tip 31a of the outer diameter portion 32 of the synthetic resin lip member 30 is moved inside the head 21a of the elastomer lip member 20. Since the head 21a is pushed and spread from the periphery, the close contact force of the head 21a with respect to the outer peripheral surface of the shaft 3 is reduced or the head 21a is not in contact with the outer surface, which may cause leakage.
【0006】本発明は、上記のような事情のもとになさ
れたもので、その技術的課題とするところは、エラスト
マ製リップ部材から、外環、エラストマ製リップ部材の
外径部、合成樹脂製リップ部材の外径部及び内環の外径
筒状部との間の間隙へ透過した冷媒の圧力によって、合
成樹脂製リップ部材がエラストマ製リップ部材を押し広
げることによる漏れの発生を防止することにある。SUMMARY OF THE INVENTION The present invention has been made under the above circumstances, and has a technical problem to be solved from an elastomer lip member to an outer ring, an outer diameter portion of the elastomer lip member, a synthetic resin. The pressure of the refrigerant permeating into the gap between the outer diameter portion of the lip member and the outer diameter cylindrical portion of the inner ring prevents leakage due to the synthetic resin lip member pushing and expanding the elastomer lip member. It is in.
【0007】[0007]
【課題を解決するための手段】上述した技術的課題は、
本発明によって有効に解決することができる。すなわち
本発明は、後端に内径側へ屈曲したカシメ部が形成され
た外環と、外径部が外環の先端に保持され内径部が密封
空間側へ延在されたエラストマ製リップ部材と、外径部
が前記エラストマ製リップ部材の外径部背面に当接され
内径部が前記密封空間側へ延在されて前記エラストマ製
リップ部材の内径部を内周側から支承する合成樹脂製リ
ップ部材と、後端が前記外環のカシメ部に当接支持され
た外径筒状部及びこの外径筒状部から内径側へ延在され
て前記合成樹脂製リップ部材の外径部背面に当接された
押さえ部からなる内環とを備えるリップ型シールであっ
て、前記内環の外径筒状部に、外環、エラストマ製リッ
プ部材の外径部、合成樹脂製リップ部材の外径部及び内
環の外径筒状部によって囲まれた間隙を反密封空間に開
放する所要数の通気部が開設されたものである。Means for Solving the Problems The technical problems described above are:
This can be effectively solved by the present invention. That is, the present invention relates to an outer ring in which a caulking portion bent to the inner diameter side is formed at the rear end, and an elastomer lip member in which the outer diameter portion is held at the tip of the outer ring and the inner diameter portion extends to the sealed space side. A synthetic resin lip having an outer diameter portion abutting against the back surface of the outer diameter portion of the elastomer lip member and an inner diameter portion extending toward the sealed space to support the inner diameter portion of the elastomer lip member from the inner circumference side. A member, an outer diameter cylindrical portion whose rear end is supported in contact with the caulking portion of the outer ring, and an inner diameter side extending from the outer diameter cylindrical portion to the inner diameter side, on the outer diameter portion rear surface of the synthetic resin lip member. A lip-type seal comprising an inner ring comprising a contact portion which is abutted, wherein an outer ring, an elastomeric lip is attached to an outer diameter cylindrical portion of the inner ring.
Outer diameter of the lip member, outer diameter of the synthetic resin lip
Open the gap surrounded by the outer cylindrical part of the ring to the anti-sealing space.
The required number of vents to be released have been opened.
【0008】[0008]
【作用】外環、エラストマ製リップ部材の外径部、合成
樹脂製リップ部材の外径部及び内環の外径筒状部によっ
て囲まれた間隙は、前記内環の外径筒状部に設けた通気
部によって反密封空間に開放されているため、エラスト
マ製リップ部材を透過して前記間隙に入った冷媒は、前
記通気部を通じて排出され、機器の高速運転等によって
このリップ型シールの雰囲気温度が比較的高温になって
も、前記間隙の圧力は上昇せず、この圧力によって合成
樹脂製リップ部材がエラストマ製リップ部材を押し広げ
るように移動されることがない。The gap surrounded by the outer ring, the outer diameter portion of the elastomer lip member, the outer diameter portion of the synthetic resin lip member, and the outer diameter cylindrical portion of the inner ring is formed by the outer diameter cylindrical portion of the inner ring. Since the refrigerant is opened to the anti-sealing space by the provided ventilation part, the refrigerant that has passed through the elastomer lip member and entered the gap is discharged through the ventilation part, and the atmosphere of the lip-shaped seal is generated by high-speed operation of the device or the like. Even when the temperature becomes relatively high, the pressure in the gap does not increase, and the pressure does not move the synthetic resin lip member so as to push the elastomer lip member.
【0009】[0009]
【実施例】図1は、本発明に係るリップ型シールの第一
実施例を示すもので、押さえ部42において合成樹脂製
リップ部材30の外径部32の背面に当接されてこの外
径部32をエラストマ製リップ部材20の外径部22側
へ押し付けている内環40は、外環10のカシメ部11
と当接された外径筒状部41の後端に、所要数の切欠4
3Aが形成されており、この切欠43によって、外環1
0と、エラストマ製リップ部材20の外径部22と、合
成樹脂製リップ部材30の外径部32と、内環40の外
径筒状部41との間の間隙Gを大気B中に開放する通気
部43としたものである。その他の部分の構成は、先に
述べた図3のリップ型シールとほぼ同様であるから、そ
の説明は省略する。FIG. 1 shows a first embodiment of a lip-type seal according to the present invention. The inner ring 40 pressing the portion 32 against the outer diameter portion 22 of the elastomer lip member 20 is formed by the caulking portion 11 of the outer ring 10.
The required number of notches 4 are provided at the rear end of
3A is formed, and the notch 43 allows the outer ring 1 to be formed.
0, a gap G between the outer diameter portion 22 of the elastomer lip member 20, the outer diameter portion 32 of the synthetic resin lip member 30, and the outer diameter cylindrical portion 41 of the inner ring 40 is opened to the atmosphere B. The ventilation part 43 is formed as follows. The configuration of the other parts is almost the same as that of the lip-type seal of FIG. 3 described above, and the description thereof will be omitted.
【0010】この実施例によれば、機内Aからエラスト
マ製リップ部材20を透過して間隙Gに入った微量の冷
媒(CFC−12あるいはHFC−134a)は、蒸発
して内環40の外径筒状部41の後端の切欠43Aを通
じて大気B中に放出される。なお、先に述べたように、
エラストマ製リップ部材20における冷媒の透過量は極
めて微量であるため、切欠43Aから大気B中への冷媒
放出は問題とならない程度のものである。また、高速運
転等によってこのリップ型シールの雰囲気温度が比較的
高温になっても、間隙Gは切欠43Aによって大気Bに
開放されているから、間隙Gの圧力は上昇しない。この
ため、間隙Gの圧力によって合成樹脂製リップ部材30
が図4に示すように移動してエラストマ製リップ部材2
0を押し開き、漏れを生じさせるといった不具合を有効
に防止できる。According to this embodiment, a small amount of the refrigerant (CFC-12 or HFC-134a) that has passed through the elastomer lip member 20 from the inside of the machine A and entered the gap G evaporates and has an outer diameter of the inner ring 40. It is released into the atmosphere B through the notch 43A at the rear end of the cylindrical portion 41. As mentioned earlier,
Since the amount of the refrigerant permeated by the elastomer lip member 20 is extremely small, the discharge of the refrigerant from the notch 43A into the atmosphere B is of a level that does not pose a problem. Further, even if the ambient temperature of the lip-type seal becomes relatively high due to high-speed operation or the like, the pressure in the gap G does not increase because the gap G is opened to the atmosphere B by the notch 43A. Therefore, the lip member 30 made of synthetic resin is
Is moved as shown in FIG.
It is possible to effectively prevent a problem such as pushing 0 to open and causing leakage.
【0011】通気部43は、図2に本発明の第二実施例
を示すように、内環40の外径筒状部41に開設した小
孔43Bからなるものであっても良い。As shown in FIG. 2, a second embodiment of the present invention, the ventilation portion 43 may be formed of a small hole 43B formed in the outer cylindrical portion 41 of the inner ring 40.
【0012】なお、図示の第一及び第二実施例によるリ
ップ型シールはいずれも、エラストマ製リップ部材20
が外環10に一体的に加硫成形されているが、本発明
は、エラストマ製リップ部材20及び合成樹脂製リップ
部材30が外環10と内環40の押さえ部42との間に
挟着されて、外環10がOリング等のパッキンを介して
ハウジング1の軸孔1aに圧入装着されるリップ型シー
ルにも同様に適用することができる。The lip seals according to the first and second embodiments shown in FIGS.
Is vulcanized and formed integrally with the outer ring 10. However, in the present invention, the lip member 20 made of elastomer and the lip member 30 made of synthetic resin are sandwiched between the outer ring 10 and the pressing portion 42 of the inner ring 40. Then, the present invention can be similarly applied to a lip-type seal in which the outer ring 10 is press-fitted into the shaft hole 1a of the housing 1 via a packing such as an O-ring.
【0013】[0013]
【発明の効果】本発明によれば、外環、エラストマ製リ
ップ部材の外径部、合成樹脂製リップ部材の外径部及び
内環の外径筒状部との間の間隙の圧力が上昇しないの
で、この圧力によって合成樹脂製リップ部材がエラスト
マ製リップ部材をシャフト外周面から押し開くように移
動することがなく、これによる漏れの発生を有効に防止
することができる。According to the present invention, the pressure in the gap between the outer ring, the outer diameter portion of the elastomer lip member, the outer diameter portion of the synthetic resin lip member, and the outer diameter cylindrical portion of the inner ring increases. Since the pressure is not applied, the synthetic resin lip member does not move so as to push the elastomer lip member open from the outer peripheral surface of the shaft due to the pressure, thereby effectively preventing the occurrence of leakage.
【図1】本発明に係るリップ型シールの第一実施例の使
用状態を軸心を通る平面で切断して示す半断面図であ
る。FIG. 1 is a half sectional view showing a use state of a first embodiment of a lip-type seal according to the present invention, cut along a plane passing through an axis.
【図2】本発明に係るリップ型シールの第二実施例の使
用状態を軸心を通る平面で切断して示す半断面図であ
る。FIG. 2 is a half sectional view showing a use state of a lip type seal according to a second embodiment of the present invention by cutting along a plane passing through an axis.
【図3】従来のリップ型シールの一例の使用状態を軸心
を通る平面で切断して示す半断面図である。FIG. 3 is a half sectional view showing a use state of an example of a conventional lip-type seal, cut along a plane passing through an axis.
【図4】上記リップ型シールにおける漏れ発生状況を軸
心を通る平面で切断した半断面図である。FIG. 4 is a half cross-sectional view of the lip-type seal in which a leak has occurred, taken along a plane passing through an axis.
1 ハウジング 3 シャフト 10 外環 11 カシメ部 20 エラストマ製リップ部材 30 合成樹脂製リップ部材 40 内環 41 外径筒状部 42 押さえ部 43 通気部 DESCRIPTION OF SYMBOLS 1 Housing 3 Shaft 10 Outer ring 11 Caulking part 20 Elastomer lip member 30 Synthetic resin lip member 40 Inner ring 41 Outer diameter cylindrical part 42 Pressing part 43 Vent part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山田 健史 愛知県刈谷市豊田町2丁目1番地 株式 会社豊田自動織機製作所内 (72)発明者 老山 幸一郎 岡山県高梁市落合町阿部1212番地 イー グル工業株式会社岡山工場内 (56)参考文献 特開 平4−347069(JP,A) 実開 昭61−186868(JP,U) 実開 昭62−124371(JP,U) 実開 平3−121270(JP,U) 実開 平3−17473(JP,U) (58)調査した分野(Int.Cl.7,DB名) F16J 15/32 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takeshi Yamada 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Koichiro Oiyama 1212 Abe, Ochiai-cho, Takahashi-shi, Okayama Eagle (56) References JP-A-4-347069 (JP, A) JP-A-61-186868 (JP, U) JP-A-62-124371 (JP, U) JP-A-3-121270 (JP, U) Japanese Utility Model 3-17473 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB name) F16J 15/32
Claims (1)
された外環と、 外径部が外環の先端に保持され内径部が密封空間側へ延
在されたエラストマ製リップ部材と、 外径部が前記エラストマ製リップ部材の外径部背面に当
接され内径部が前記密封空間側へ延在されて前記エラス
トマ製リップ部材の内径部を内周側から支承する合成樹
脂製リップ部材と、 後端が前記外環のカシメ部に当接支持された外径筒状部
及びこの外径筒状部から内径側へ延在されて前記合成樹
脂製リップ部材の外径部背面に当接された押さえ部から
なる内環とを備え、 前記内環の外径筒状部に、外環、エラストマ製リップ部
材の外径部、合成樹脂製リップ部材の外径部及び内環の
外径筒状部によって囲まれた間隙を反密封空間に開放す
る所要数の通気部が開設されたことを特徴とするリップ
型シール。An outer ring having a caulked portion bent at the rear end toward the inner diameter side; an elastomer lip member having an outer diameter portion held at a tip of the outer ring and an inner diameter portion extending to the sealed space side; A synthetic resin lip having an outer diameter portion abutting against the back surface of the outer diameter portion of the elastomer lip member and an inner diameter portion extending toward the sealed space to support the inner diameter portion of the elastomer lip member from the inner circumference side; A member, an outer diameter cylindrical portion whose rear end is supported in contact with the caulked portion of the outer ring, and an inner diameter side extending from the outer diameter cylindrical portion to the inner diameter side of the synthetic resin lip member. An inner ring comprising an abutting pressing portion, and an outer ring, an elastomer lip portion on an outer diameter cylindrical portion of the inner ring.
Of the outer diameter of the material, the outer diameter of the synthetic resin lip
Open the gap surrounded by the outer cylindrical part to the anti-sealing space
Lip-type seals, wherein the vent of the required number has been established that.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11969094A JP3293074B2 (en) | 1994-05-10 | 1994-05-10 | Lip type seal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11969094A JP3293074B2 (en) | 1994-05-10 | 1994-05-10 | Lip type seal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07305773A JPH07305773A (en) | 1995-11-21 |
JP3293074B2 true JP3293074B2 (en) | 2002-06-17 |
Family
ID=14767652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11969094A Expired - Lifetime JP3293074B2 (en) | 1994-05-10 | 1994-05-10 | Lip type seal |
Country Status (1)
Country | Link |
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JP (1) | JP3293074B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009017022A1 (en) | 2007-08-02 | 2009-02-05 | Eagle Industry Co., Ltd. | Seal device |
-
1994
- 1994-05-10 JP JP11969094A patent/JP3293074B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07305773A (en) | 1995-11-21 |
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