JPH0225975Y2 - - Google Patents
Info
- Publication number
- JPH0225975Y2 JPH0225975Y2 JP1985104874U JP10487485U JPH0225975Y2 JP H0225975 Y2 JPH0225975 Y2 JP H0225975Y2 JP 1985104874 U JP1985104874 U JP 1985104874U JP 10487485 U JP10487485 U JP 10487485U JP H0225975 Y2 JPH0225975 Y2 JP H0225975Y2
- Authority
- JP
- Japan
- Prior art keywords
- lip member
- inner diameter
- lip
- rotating shaft
- auxiliary sheet
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- ZQXCQTAELHSNAT-UHFFFAOYSA-N 1-chloro-3-nitro-5-(trifluoromethyl)benzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC(C(F)(F)F)=C1 ZQXCQTAELHSNAT-UHFFFAOYSA-N 0.000 claims 1
- PYVHTIWHNXTVPF-UHFFFAOYSA-N F.F.F.F.C=C Chemical group F.F.F.F.C=C PYVHTIWHNXTVPF-UHFFFAOYSA-N 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、冷凍機およびエアコン用コンプレツ
サ等の、冷媒を使用する機器内に装着され、その
回転軸部からの、前記冷媒を含む密封流体の漏洩
を阻止するリツプシールの改良に関する。[Detailed description of the invention] [Industrial application field] The present invention is installed in equipment that uses refrigerant, such as refrigerators and air conditioner compressors, and the sealed fluid containing the refrigerant flows from the rotating shaft of the equipment. This invention relates to improvements to lip seals that prevent the leakage of water.
従来より、たとえばカーエアコン用コンプレツ
サ等に装着されるリツプシールとして、第２図の
ような構成のものが汎用されている。
2. Description of the Related Art Conventionally, a lip seal having a structure as shown in FIG. 2 has been widely used as a lip seal attached to, for example, a car air conditioner compressor.
すなわち、この種のリツプシールは、機器のハ
ウジング１の軸孔２に形成された段部３に、Ｏリ
ング４を介して気密的に嵌着され、スナツプリン
グ５により抜け止めされた金属製のケース６と、
該ケース６内に嵌着されたゴムパツキング７およ
びケース６内周にカシメ固定された断面略Ｌ字形
状の金属製のリテーナ８により外径部が気密的に
挾着され、環状シート状のリツプ部材９とより構
成されている。ケース６とリテーナ８との間にお
いて外径部９ａが径方向に展開するごとく支持さ
れている前記リツプ部材９は、内径部９ｂが軸方
向密封流体Ａ側へ屈曲変形しており、該内径部９
ｂの内周面において、ハウジング１の軸孔２内に
回転自在に遊挿された回転軸１０の外周面に適宜
面圧をもつて摺接することにより、機器内に封入
された冷媒たるフレオンガスCl2F2および冷凍機
油等密封流体Ａの漏出を防止している。 That is, this type of lip seal consists of a metal case 6 that is airtightly fitted into a step 3 formed in a shaft hole 2 of a device housing 1 via an O-ring 4 and prevented from coming off by a snap ring 5. and,
The outer diameter portion is airtightly clamped by a rubber packing 7 fitted into the case 6 and a metal retainer 8 having a substantially L-shaped cross section and fixed to the inner periphery of the case 6 by caulking, thereby forming an annular sheet-shaped lip member. It consists of 9. The lip member 9 is supported between the case 6 and the retainer 8 so that the outer diameter portion 9a expands in the radial direction, and the inner diameter portion 9b is bent toward the sealing fluid A side in the axial direction. 9
By slidingly contacting the inner circumferential surface of b with the outer circumferential surface of the rotating shaft 10, which is rotatably loosely inserted into the shaft hole 2 of the housing 1, with appropriate surface pressure, the Freon gas Cl, which is the refrigerant sealed in the equipment, is removed. 2 Prevents leakage of sealing fluid A such as F 2 and refrigerating machine oil.
一般に、上記リツプ部材９には、自己潤滑性お
よび耐久性に優れた３フツ化もしくは４フツ化エ
チレン樹脂材が用いられており、フレオンガスや
冷凍機油に対するシール材として好適であるが、
これらの樹脂材は比較的弾力性に乏しく、また熱
可塑性であるため、機器の回転中における温度上
昇によつて軟化し、また経時的に弾力性が低下し
てゆき、リツプ部材９の回転軸１０外周面に対す
る緊締力が低下して密封流体Ａの漏洩量が増大す
る問題を有していた。
Generally, the lip member 9 is made of trifluoroethylene or tetrafluoroethylene resin material, which has excellent self-lubricating properties and durability, and is suitable as a sealing material against freon gas and refrigerating machine oil.
These resin materials have relatively poor elasticity and are thermoplastic, so they soften as the temperature rises during the rotation of the equipment, and their elasticity decreases over time, causing the rotation axis of the lip member 9 to deteriorate. 10 had a problem in that the tightening force against the outer circumferential surface decreased and the amount of leakage of the sealing fluid A increased.
本考案は、上記した問題点に鑑み、リツプシー
ルの摺動材であるリツプ部材の密封流体側となる
表面に、回転軸外周面とは非接触であつて、内径
部に前記リツプ部材の内径部を締付ける環状の厚
肉部を備えたゴム様弾性材製補助シートが被着さ
れ、軸方向に延びるこれらリツプ部材と補助シー
トの内径部の先端は軸線に直交する同一平面上で
切断されてなることとし、該シートの弾力性をも
つて前記リツプ部材の回転軸外周面に対する緊締
力を補助して長期に亘つて安定した密封性能を得
るものである。
In view of the above-mentioned problems, the present invention provides a sealing fluid side surface of the lip member, which is a sliding member of the lip seal, that is not in contact with the outer circumferential surface of the rotating shaft, and has an inner diameter portion on the inner diameter portion of the lip member. An auxiliary sheet made of a rubber-like elastic material having an annular thick-walled portion for tightening the auxiliary sheet is attached, and the tip of the inner diameter portion of the axially extending lip member and the auxiliary sheet are cut on the same plane perpendicular to the axis. In particular, the elasticity of the sheet assists the tightening force of the lip member against the outer circumferential surface of the rotating shaft, thereby achieving stable sealing performance over a long period of time.
以下、本考案リツプシールの具体的な構成なら
びに作用を、第１図に示す実施例にもとづいて説
明する。
Hereinafter, the specific structure and operation of the lip seal of the present invention will be explained based on the embodiment shown in FIG.
同図において第２図の既述従来例と同じ構成に
なる部分には同符号が付してあり、すなわち１は
カーエアコン用コンプレツサのハウジング、２は
軸孔、３は段部、４はＯリング、５はスナツプリ
ング、６は金属ケース、７はゴムパツキング、８
はリテーナ、Ａは冷媒たるフレオンガスCl2F2お
よび冷凍機油等よりなる密封流体である。ケース
６とゴムパツキング７およびリテーナ８により外
径部が気密的に保持されているシールリツプ１１
は、４フツ化エチレン樹脂材をもつて製せられた
漏斗状の主リツプ部材１２と該主リツプ部材１２
の密封流体Ａ側となる表面に一体的に被着され、
内径部１３ａに環状の厚肉部１３ｂが形成されて
なるゴム様弾性材製の補助シート１３とよりな
り、軸方向密封流体Ａ側へ突出するごとく屈曲変
形してなる前記主リツプ部材１２の内径部１２ａ
の内周面１２ｂにおいて回転軸１０外周面に摺接
している。 In the same figure, parts having the same configuration as those of the conventional example shown in FIG. Ring, 5 is a snap ring, 6 is a metal case, 7 is a rubber packing, 8
is a retainer, and A is a sealing fluid consisting of Freon gas Cl 2 F 2 as a refrigerant and refrigerating machine oil. A seal lip 11 whose outer diameter portion is held airtight by the case 6, rubber packing 7, and retainer 8.
The main lip member 12 is a funnel-shaped main lip member 12 made of tetrafluoroethylene resin material.
is integrally attached to the surface facing the sealed fluid A side,
The inner diameter of the main lip member 12 is made of an auxiliary sheet 13 made of a rubber-like elastic material with an annular thick walled portion 13b formed on the inner diameter portion 13a, and is bent and deformed so as to protrude toward the sealed fluid A side in the axial direction. Part 12a
The inner circumferential surface 12b of the rotary shaft 10 is in sliding contact with the outer circumferential surface of the rotating shaft 10.
上記構成によれば、補助シート１３の内径部１
３ａに形成された厚肉部１３ｂは大きな弾性を有
しており、主リツプ部材１２の内径部１２ａに対
し、その外周側から弾性を付勢し、すなわち前記
内径部１２ａの回転軸１０に対する緊締力を増大
せしめている。なお、シールリツプ１１の内径部
先端において、主リツプ部材１２の先端面１２ｃ
と補助シート１３の先端面１３ｃは略同一平面
（径方向面）上で切断されたものあつて、厚肉部
１３ｂを含む補助シート１３の内径部１３ａは回
転軸１０の外周面と非接触となつており、主リツ
プ部材１２の内径部１２ａに回転軸１０との摺動
による摩耗が進行しても、主リツプ部材１２の内
周面１２ｂと回転軸１０外周面との間の潤滑を保
持する密封流体Ａによる液膜の形成が補助シート
１３の先端面１３ｃによつて阻害されることがな
いよう考慮されている。 According to the above configuration, the inner diameter portion 1 of the auxiliary seat 13
The thick portion 13b formed in the main lip member 12 has a large elasticity, and applies elasticity to the inner diameter portion 12a of the main lip member 12 from the outer circumferential side thereof, that is, tightens the inner diameter portion 12a against the rotating shaft 10. It is increasing its power. Note that at the tip of the inner diameter part of the seal lip 11, the tip surface 12c of the main lip member 12
The tip end surface 13c of the auxiliary sheet 13 is cut on substantially the same plane (radial direction surface), and the inner diameter portion 13a of the auxiliary sheet 13 including the thick portion 13b is not in contact with the outer circumferential surface of the rotating shaft 10. This structure maintains lubrication between the inner peripheral surface 12b of the main lip member 12 and the outer peripheral surface of the rotating shaft 10 even if wear progresses on the inner diameter portion 12a of the main lip member 12 due to sliding with the rotating shaft 10. It is considered that the formation of a liquid film by the sealing fluid A is not inhibited by the tip end surface 13c of the auxiliary sheet 13.
以上説明したとおり、本考案に係るリツプシー
ルは、リツプ部材の密封流体側となる表面に、弾
性材製の補助シートを被着し、該補助シートの内
径部に前記リツプ部材の内径部を締付ける環状の
厚肉部を設けたことにより、弾性の比較的乏しい
４フツ化エチレン樹脂材等にて製せられたリツプ
部材に対してシールに必要かつ十分な緊締力を付
与し、かつ温度変化による緊締力の低下を抑制
し、しかもこの補助シートの内径部は回転軸外周
面と常に非接触であつて、密封流体によるリツプ
部材の潤滑を妨げず、長期間に亘つて安定したシ
ール性能を確保することができるもので、その実
用的効果はきわめて大きい。
As explained above, the lip seal according to the present invention has an annular shape in which an auxiliary sheet made of an elastic material is attached to the surface of the lip member that faces the sealed fluid, and the inner diameter part of the lip member is tightened to the inner diameter part of the auxiliary sheet. By providing a thick walled portion, it is possible to apply the necessary and sufficient tightening force to the lip member made of polytetrafluoroethylene resin, etc., which has relatively poor elasticity, and to prevent tightening due to temperature changes. This suppresses the drop in force, and the inner diameter of this auxiliary seat is always in non-contact with the outer peripheral surface of the rotating shaft, ensuring stable sealing performance over a long period of time without interfering with the lubrication of the lip member by the sealing fluid. It is possible to do so, and its practical effects are extremely large.
第１図は本考案リツプシールの一実施例を示す
装着状態の半裁断面図、第２図は従来のリツプシ
ールの一例を示す装着状態の半裁断面図である。
１…ハウジング、２…軸孔、６…ケース、１０
…回転軸、１１…シールリツプ、１２…主リツプ
部材、１２ａ，１３ａ…内径部、１３…補助シー
ト、１３ｂ…厚肉部。
FIG. 1 is a half-cut sectional view showing an embodiment of the lip seal of the present invention in an installed state, and FIG. 2 is a half-cut sectional view showing an example of a conventional lip seal in an installed state. 1...Housing, 2...Shaft hole, 6...Case, 10
...Rotating shaft, 11...Seal lip, 12...Main lip member, 12a, 13a...Inner diameter part, 13...Auxiliary seat, 13b...Thick wall part.
Claims (1)
状の金属ケースと、３フツ化もしくは４フツ化エ
チレン樹脂等を主材料とし、外径部が前記ケース
内に気密的に保持された漏斗状のリツプ部材とよ
りなり、軸方向かつ密封流体側へ突出するごとく
屈曲変形してなる該リツプ部材の内径部内周面
が、回転軸の外周面に適宜面圧をもつて摺接する
リツプシールにおいて、前記リツプ部材の密封流
体側となる表面に、回転軸外周面とは非接触であ
つて、内径部に前記リツプ部材の内径部を締付け
る環状の厚肉部を備えたゴム様弾性材製補助シー
トが被着され、軸方向に延びるこれらリツプ部材
と補助シートの内径部の先端は軸線に直交する同
一平面上で切断されてなることを特徴とするリツ
プシール。 An annular metal case that is airtightly fitted into the inner periphery of the shaft hole of the housing, and a funnel whose main material is trifluoride or tetrafluoride ethylene resin, and whose outer diameter portion is airtightly held within the case. A lip seal comprising a lip member having a shape, the inner peripheral surface of the inner diameter part of the lip member being bent and deformed so as to protrude in the axial direction toward the sealed fluid side, slidingly contacting the outer peripheral surface of the rotating shaft with an appropriate surface pressure, An auxiliary sheet made of a rubber-like elastic material, which is provided on the surface of the lip member on the sealed fluid side and is not in contact with the outer circumferential surface of the rotating shaft, and has an annular thick-walled part on the inner diameter part that tightens the inner diameter part of the lip member. A lip seal characterized in that the tips of the inner diameter portions of the lip member and the auxiliary sheet extending in the axial direction are cut on the same plane perpendicular to the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985104874U JPH0225975Y2 (en) | 1985-07-11 | 1985-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985104874U JPH0225975Y2 (en) | 1985-07-11 | 1985-07-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6213266U JPS6213266U (en) | 1987-01-27 |
| JPH0225975Y2 true JPH0225975Y2 (en) | 1990-07-16 |
Family
ID=30978772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985104874U Expired JPH0225975Y2 (en) | 1985-07-11 | 1985-07-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0225975Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5585933B2 (en) * | 2010-05-18 | 2014-09-10 | Ｎｏｋ株式会社 | Sealing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS431971Y1 (en) * | 1965-05-21 | 1968-01-27 |
-
1985
- 1985-07-11 JP JP1985104874U patent/JPH0225975Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS431971Y1 (en) * | 1965-05-21 | 1968-01-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6213266U (en) | 1987-01-27 |
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