JPH025159Y2 - - Google Patents
Info
- Publication number
- JPH025159Y2 JPH025159Y2 JP1986177421U JP17742186U JPH025159Y2 JP H025159 Y2 JPH025159 Y2 JP H025159Y2 JP 1986177421 U JP1986177421 U JP 1986177421U JP 17742186 U JP17742186 U JP 17742186U JP H025159 Y2 JPH025159 Y2 JP H025159Y2
- Authority
- JP
- Japan
- Prior art keywords
- wall
- annular wall
- annular
- lip seal
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 29
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000010419 fine particle Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle 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
- 239000000843 powder Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000003566 sealing material Substances 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、自動車空調用圧縮機等の開放型圧縮
機に用いる軸封装置の改良に係わり、更に詳しく
は回転軸を有する圧縮機本体に密封装着し且つ該
回転軸と密封係合して本体内部に高圧室を形成す
る軸封装置に関する。[Detailed description of the invention] [Field of industrial application] The present invention relates to the improvement of a shaft seal device used in an open type compressor such as a compressor for automobile air conditioning. The present invention relates to a shaft sealing device that is sealed and engaged with the rotating shaft to form a high pressure chamber inside the main body.
従来の軸封装置としては、メカニカルシール及
びオイルシールが主に使用されているが、自動車
空調用圧縮機等の開放型圧縮機に使用する場合、
最高温度150℃、最高圧力15Kg／cm2にも達する冷
凍機油及び冷媒の雰囲気中に常にさらされるの
で、耐熱性、耐圧性、耐薬品性及び耐摩耗性等の
性能が要求され、通常合成ゴム製リツプを有する
オイルシールは使用に耐え得ずメカニカルシール
が使用されている。該メカニカルシールは、回転
軸に密嵌装着した回転接触輪と本体の固定部に密
嵌した固定接触輪とをその端面で接触させ、回転
接触輪はバネによつて固定接触輪に摺動面に於い
て加圧接触し流体を密封する構造であるので、該
摺動面は互いに高度な平滑性を要求されしかも高
価である。
Mechanical seals and oil seals are mainly used as conventional shaft seal devices, but when used in open type compressors such as automobile air conditioning compressors,
Since it is constantly exposed to an atmosphere of refrigeration oil and refrigerant that reaches a maximum temperature of 150℃ and a maximum pressure of 15Kg/ cm2 , properties such as heat resistance, pressure resistance, chemical resistance, and abrasion resistance are required, and synthetic rubber is usually used. Oil seals with manufactured lips cannot withstand use, so mechanical seals are used. In this mechanical seal, a rotating contact ring that is tightly fitted to a rotating shaft and a fixed contact ring that is tightly fitted to a fixed part of the main body are brought into contact at their end surfaces, and the rotating contact ring is connected to the fixed contact ring by a spring on its sliding surface. Since the structure is such that the sliding surfaces are in pressurized contact and fluid-tight, the sliding surfaces are required to have a high degree of smoothness and are expensive.
その為、近年は耐熱性、耐圧性、耐薬品性、耐
摩耗性、低摩擦性等に優れた四弗化エチレン樹脂
を基材としたリツプシールが各方面で使用されて
きており、更に密封性を高める目的で、リツプの
形状及びその保持部の構造、あるいは充填材の配
合等の工夫が施されてきた。更に詳しくは、流体
圧の変動に応じてリツプの緊塞面積が増減して動
力と摩耗を最小限に止めるようなもの、あるいは
ガータースプリングによる緊縛力が変化する様に
工夫されたもの（実公昭43−8828号、実公昭43−
15626号公報）、また四弗化エチレン樹脂は合成ゴ
ムに比べて弾性に乏しく、剛性が高い材質である
為、その欠点をゴム等の軟弾性材と併用すること
によつて補い前記軟弾性材が回転軸の回転振動や
偏心運動に追随して生じるリツプ部の運動に対し
て無理なく応答するように構成されたもの（実公
昭45−17465号、実公昭46−2578号公報）、あるい
は薄厚四弗化エチレン樹脂部材を積層することに
よつて弾性力を増し、軸振れへの追従性を改良し
たもの（実公昭46−1701号公報）等様々な軸封装
置が提供されている。また、四弗化エチレン樹脂
に銅系の合金あるいは鉄系の合金等の金属粉を充
填して、シール材として要求される性能を高め又
は新たに付加する工夫もなされてきた。しかし何
れも構造が複雑で、特に保持部の形状が複雑で成
形性及び耐久性に問題があり、更に高温高圧の過
酷な雰囲気中で使用する場合には密封性が完全で
ないといつた問題があつた。 Therefore, in recent years, lip seals based on tetrafluoroethylene resin, which has excellent heat resistance, pressure resistance, chemical resistance, abrasion resistance, and low friction properties, have been used in various fields, and are also improving in sealing performance. In order to increase this, improvements have been made to the shape of the lip, the structure of its holding part, the composition of fillers, etc. More specifically, there are those that minimize power and wear by increasing and decreasing the area of the lip in response to fluctuations in fluid pressure, or those that are devised so that the binding force of a garter spring changes (Jikkosho). No. 43-8828, Jikko 43-
15626), and since tetrafluoroethylene resin is a material with poor elasticity and high rigidity compared to synthetic rubber, its disadvantages can be compensated for by using it in combination with a soft elastic material such as rubber. be configured to reasonably respond to the movement of the lip part that follows the rotational vibration or eccentric movement of the rotating shaft (Kokoku No. 45-17465, Publication No. 2578 of 1973), or thin Various shaft sealing devices have been provided, including one in which the elastic force is increased by laminating tetrafluoroethylene resin members and the ability to follow shaft runout is improved (Japanese Utility Model Publication No. 1701/1983). Further, attempts have been made to fill tetrafluoroethylene resin with metal powder such as copper alloy or iron alloy to improve or add new performance required as a sealing material. However, all of them have complicated structures, especially the shape of the holding part, which causes problems with moldability and durability.Furthermore, when used in harsh environments of high temperature and high pressure, there are problems such as incomplete sealing. It was hot.
本考案が前述の状況に鑑み、解決しようとする
ところは、自動車空調用圧縮機等の開放型圧縮機
に於ける高温高圧でしかも冷凍機油及び冷媒に常
にさらされる過酷な雰囲気中に於いても充分な密
封性を保持するとともに耐久性にも優れ、構造が
簡単で安価な軸封装置を提供する点にある。
In view of the above-mentioned situation, the present invention aims to solve the problem in open compressors such as automobile air conditioning compressors, which operate under high temperature and high pressure conditions, and even in harsh environments where they are constantly exposed to refrigeration oil and refrigerant. The object of the present invention is to provide a shaft sealing device that maintains sufficient sealing performance, has excellent durability, has a simple structure, and is inexpensive.
〔問題点を解決する為の手段〕
本考案は、前述の問題解決の為に、回転軸を有
する本体に密封装着し且つ該回転軸と密封係合し
て本体内部に高圧室を形成する軸封装置に於い
て、中空環体の軸方向一側に半径方向内方へ外側
環状壁を延設し、他側には半径方向内方へ内側環
状壁を延設するとともに、該内側環状壁の内周縁
を軸方向に沿つて外方へ延設し且つ半径方向外方
へ延設して外方へ開放したＯリング溝を形成し、
前記中空環体内壁と外側環状壁及び内側環状壁と
で内方へ開放した環状凹所を形成してなるハウジ
ングと、前記ハウジングの環状凹所に嵌挿し得る
外径を有するとともに、前記回転軸を挿通し得る
円孔を有する環状支持板と、前記環状支持板の外
周と略一致した外周の保持縁を有するとともに、
該保持縁の中央部を軸方向一側へ膨出させたコー
ン状の摺動部を有する二枚のリツプシールと、前
記リツプシールの保持縁間に介装するとともに、
一方の摺動部を収容し得る通孔を有し且つ前記環
状凹所の内壁との間にＯリングを装着し得る外壁
を有する中間部材と、前記環状凹所に嵌挿し且つ
前記外側環状壁の内面に当接し得る外径の円筒部
を有するとともに、該円筒部の内縁を半径方向内
方へ前記リツプシールの保持縁を支持し得る中空
円板状の押圧壁を延設してなる押圧部材とよりな
る軸封装置を構成した。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a shaft that is hermetically attached to a main body having a rotating shaft and that sealingly engages with the rotating shaft to form a high pressure chamber inside the main body. In the sealing device, an outer annular wall is provided extending radially inward on one side of the hollow ring body in the axial direction, an inner annular wall is provided extending radially inward on the other side, and the inner annular wall an O-ring groove extending outward along the axial direction and extending outward in the radial direction to form an outwardly open O-ring groove;
a housing formed by the hollow annular inner wall, an outer annular wall, and an inner annular wall forming an annular recess that is open inward; and an outer diameter that can be fitted into the annular recess of the housing; an annular support plate having a circular hole through which the annular support plate can be inserted;
interposed between two lip seals each having a cone-shaped sliding portion in which the center portion of the retaining edge is bulged toward one side in the axial direction, and the retaining edge of the lip seal;
an intermediate member having an outer wall having a through hole capable of accommodating one sliding part and capable of mounting an O-ring between the intermediate member and the inner wall of the annular recess; and an outer annular wall fitted into the annular recess; A pressing member having a cylindrical portion with an outer diameter that can come into contact with the inner surface of the lip seal, and a hollow disc-shaped pressing wall that can support the retaining edge of the lip seal extending radially inward from the inner edge of the cylindrical portion. A shaft sealing device was constructed.
以上の如き内容からなる本考案の軸封装置は、
ハウジングの環状凹所内で内側環状壁に環状支持
板の一側周面を当接させ、他側周面にはリツプシ
ールの保持縁を密接させるとともに、その摺動部
を前記環状支持板の円孔内に位置させ、更に該リ
ツプシールの保持縁と別のリツプシールの保持縁
との間に、その摺動部を通孔内に位置させた状態
で中間部材を介在させるとともに、該中間部材の
外壁とハウジングの環状凹所内周面間及び前記リ
ツプシールの両保持縁間にＯリングを介在させ、
そして押圧部材の押圧壁内面を前記リツプシール
の保持縁に密接させるとともに、円筒部の外側縁
をハウジングの外側環状壁の内面に当接させて前
記Ｏリングを圧接してなり、前記両リツプシール
をＯリングを介してハウジングに密封装着するも
ので、二つのリツプシールはそれぞれ回転軸に密
接摺動して流体を密封するとともに、該両リツプ
シール間には空間が形成されているので、圧縮機
本体内部の圧力と比較して該空間は減圧状態にあ
り、外側のリツプシールは低い圧力の流体を封じ
て、二重の軸封を行うものである。
The shaft sealing device of the present invention, which has the above contents,
One side circumferential surface of the annular support plate is brought into contact with the inner annular wall within the annular recess of the housing, and the retaining edge of the lip seal is brought into close contact with the other side circumference, and its sliding portion is brought into contact with the circular hole of the annular support plate. Further, an intermediate member is interposed between the retaining edge of the lip seal and the retaining edge of another lip seal, with the sliding portion thereof being positioned within the through hole, and the outer wall of the intermediate member and the retaining edge of another lip seal are interposed. interposing an O-ring between the inner peripheral surface of the annular recess of the housing and between both retaining edges of the lip seal;
Then, the inner surface of the pressing wall of the pressing member is brought into close contact with the holding edge of the lip seal, and the outer edge of the cylindrical portion is brought into contact with the inner surface of the outer annular wall of the housing to press the O-ring. It is hermetically attached to the housing via a ring, and the two lip seals each slide closely on the rotating shaft to seal the fluid, and since a space is formed between the two lip seals, the inside of the compressor body is The space is under reduced pressure compared to the pressure, and the outer lip seal seals in the low pressure fluid to provide double shaft sealing.
次に添付図面に示した実施例に基づき更に本考
案の詳細を説明する。
Next, the present invention will be further explained in detail based on the embodiments shown in the accompanying drawings.
第１図は本考案の軸封装置の代表的実施例を示
す分解斜視図、第２図はその断面図であり、Ａは
ハウジング、Ｂは環状支持板、Ｃはリツプシー
ル、Ｄは中間部材、Ｅは押圧部材である。 FIG. 1 is an exploded perspective view showing a typical embodiment of the shaft sealing device of the present invention, and FIG. 2 is a sectional view thereof, in which A is a housing, B is an annular support plate, C is a lip seal, D is an intermediate member, E is a pressing member.
ハウジングＡは、圧縮機本体１に密封装着する
もので、金属製の中空環体２の軸方向一側、即ち
圧縮機本体１外方に対応する側に半径方向内方へ
外側環状壁３を延設し、他側、即ち圧縮機本体１
内方に対応する側には半径方向内方へ内側環状壁
４を延設するとともに、該内側環状壁４の内周縁
を軸方向に沿つて外方へ延設し且つ半径方向外方
へ延設して外方へ開放したＯリング溝５を形成
し、前記中空環体２内壁と外側環状壁３及び内側
環状壁４とで内方へ開放した環状凹所６を形成し
た。また、前記外側環状壁３は、後述の各部材を
装着した後に前記中空環体２の端部を半径方向内
方へかしめるか又は該中空環体２の端部に切り込
みを入れて半径方向内方へ折曲して形成したもの
で、更に内縁部の対角位置の一部を切欠して前記
ハウジングＡ着脱用の凹部７，７を形成してあ
り、更に多数の凹部７，…を形成することもでき
る。尚、前記Ｏリング溝５には、Ｏリング８を装
着するものである。 The housing A is hermetically attached to the compressor body 1, and has an outer annular wall 3 extending radially inward on one axial side of the metal hollow ring body 2, that is, on the side corresponding to the outside of the compressor body 1. The other side, that is, the compressor main body 1
On the side corresponding to the inside, an inner annular wall 4 is provided extending radially inward, and an inner peripheral edge of the inner annular wall 4 is provided axially extending outward and radially outward. The inner wall of the hollow ring body 2, the outer annular wall 3, and the inner annular wall 4 formed an annular recess 6 that opened inward. Further, the outer annular wall 3 is formed by caulking the end of the hollow annular body 2 radially inward after attaching each member to be described later, or by making a cut in the end of the hollow annular body 2. It is formed by bending inward, and furthermore, a part of the diagonal position of the inner edge is cut out to form recesses 7, 7 for attaching and detaching the housing A, and furthermore, a large number of recesses 7, . . . are formed. It can also be formed. Incidentally, an O-ring 8 is attached to the O-ring groove 5.
環状支持板Ｂは、前記ハウジングＡの環状凹所
６に嵌挿し得る外径を有するとともに、回転軸Ｓ
を挿通し得る円孔９を同心状に設けて形成した。 The annular support plate B has an outer diameter that can be fitted into the annular recess 6 of the housing A, and the rotation axis S
A circular hole 9 through which the material can be inserted is provided concentrically.
リツプシールＣは、四弗化エチレン樹脂に、グ
ラフアイト微粒子（平均粒径15μm）を３〜10重
量％並びにカーボン繊維（平均繊維径12.5μm，
平均繊維長0.13mm）を３〜15重量％混合充填した
後、通常の方法で焼成したシール基材を適宜な厚
さで切断面が滑らかになる様に切断し且つ中心に
前記回転軸Ｓの直径より小なる直径の孔を形成
し、更に軸方向一側から該孔より大なる直径を有
する円筒状の治具を圧入し、又はシール基材を加
熱した後前記治具を前記孔に挿入して冷却し、又
は加熱した前記治具をシール基材の孔に挿入した
後冷却して成形したもので、前記環状支持板Ｂの
外周と略一致した外周の保持縁１０を有するとと
もに、該保持縁１０の中央部を軸方向一側へ膨出
させてコーン状の摺動部１１を形成した。尚、前
記グラフアイト微粒子とカーボン繊維のより好ま
しい充填割合は、グラフアイト微粒子を５〜10重
量％並びにカーボン繊維を５〜10重量％で、更に
充填総量を約15重量％となしたものが、開放型圧
縮機の軸封装置に最適なシール基材となる。また
便宜上、２つ使用するリツプシールの圧縮機本体
１の内方側をリツプシールＣとし、外方側をリツ
プシールC′とするものとする。 Lipseal C is made by adding 3 to 10% by weight of graphite fine particles (average particle diameter 15 μm) and carbon fibers (average fiber diameter 12.5 μm) to tetrafluoroethylene resin.
After mixing and filling 3 to 15% by weight of fibers with an average fiber length of 0.13 mm, the sealing base material was fired in a conventional manner and cut to an appropriate thickness so that the cut surface was smooth. A hole with a diameter smaller than the diameter is formed, and a cylindrical jig with a diameter larger than the hole is press-fitted from one side in the axial direction, or the jig is inserted into the hole after heating the sealing base material. The jig is cooled or heated by inserting the heated jig into the hole of the sealing base material and then cooling and molding, and has a retaining edge 10 with an outer periphery that substantially coincides with the outer periphery of the annular support plate B. The central portion of the holding edge 10 was bulged toward one side in the axial direction to form a cone-shaped sliding portion 11. A more preferable filling ratio of the graphite fine particles and carbon fibers is 5 to 10% by weight of graphite fine particles and 5 to 10% by weight of carbon fibers, and the total filling amount is about 15% by weight. It is an ideal sealing base material for the shaft sealing device of open type compressors. For convenience, the inner side of the compressor body 1 of the two lip seals used will be called the lip seal C, and the outer side will be called the lip seal C'.
中間部材Ｄは、前記リツプシールＣ，C′の保持
縁１０，１０′間に介装するもので、金属又は硬
質合成樹脂で、中心部に外方側のリツプシール
C′の摺動部１１′を収容し得る通孔１２を形成し
且つ前記環状凹所６の内壁との間にＯリング１３
を装着し得る外壁１４を形成した。 The intermediate member D is interposed between the retaining edges 10 and 10' of the lip seals C and C', and is made of metal or hard synthetic resin, and has an outer lip seal in the center.
A through hole 12 capable of accommodating the sliding portion 11' of C' is formed, and an O-ring 13 is formed between the inner wall of the annular recess 6 and the inner wall of the annular recess 6.
An outer wall 14 was formed on which the outer wall 14 could be attached.
押圧部材Ｅは、金属又は硬質合成樹脂で、外周
部に前記環状凹所６に嵌挿し且つ前記外側環状壁
３の内面に当接し得る外径の円筒部１５を形成す
るとともに、該円筒部１５の内縁を半径方向内方
へ前記リツプシールC′の保持縁１０′を支持し得
る円板状の押圧壁１６を延設し、更に該押圧壁１
６の中心部には前記回転軸Ｓを挿通し得る円孔１
７を形成したものである。 The pressing member E is made of metal or hard synthetic resin, and has a cylindrical portion 15 on its outer periphery having an outer diameter that can be fitted into the annular recess 6 and abut against the inner surface of the outer annular wall 3. A disk-shaped pressing wall 16 capable of supporting the retaining edge 10' of the lip seal C' extends radially inward from the inner edge of the lip seal C', and the pressing wall 1
6 has a circular hole 1 through which the rotating shaft S can be inserted.
7 was formed.
しかして、本考案の軸封装置を組立てる場合
は、第２図に示す如くハウジングＡの外側環状壁
３を半径方向内方へ延設してない状態の中空環体
２に、環状支持板Ｂを嵌挿してその軸方向内方即
ち圧縮機本体１の高圧室１８側の周面を内側環状
壁４の内面に当接させ、外方周面にはリツプシー
ルＣの保持縁１０を密接させるとともに、該リツ
プシールＣの摺動部１１を前記環状支持板Ｂの円
孔９内に位置させ、更に軸方向外方からＯリング
１３を圧入して保持縁１０の外方周面に当接する
とともに、該Ｏリング１３の半径方向内方に中間
部材Ｄを圧入し、そして別のリツプシールC′の摺
動部１１′を該中間部材Ｄの通孔１２′内に位置さ
せた状態で挿入し、その保持縁１０′の内方周面
を前記Ｏリング１３に密接させ、更に外方より押
圧部材Ｅを嵌挿してその押圧壁１６を前記リツプ
シールC′の保持縁１０′の外方面に当接させた状
態で、当該ハウジングＡの中空環体２の外側端部
を半径方向内方へかしめる又は折曲するととも
に、前記押圧部材Ｅの円筒部１５の外側縁を内方
へ押圧保持して、前記Ｏリング１３を両リツプシ
ールＣ，C′の保持縁１０，１０′間並びにハウジ
ングＡの中空環体２内壁と中間部材Ｄの外壁１４
との間で圧接して完了する。そして、ハウジング
ＡのＯリング溝５にＯリング８を巻装した後、該
ハウジングＡを圧縮機本体１に嵌入して密封装着
するとともに、前記回転軸Ｓを２つのリツプシー
ルＣ，C′で密封して、該圧縮機本体１内部に高圧
室１８を形成し、更に該リツプシールＣ，C′間に
空間部１９を形成して二重に密封するものであ
る。 Therefore, when assembling the shaft sealing device of the present invention, as shown in FIG. The axially inner side of the compressor body 1, that is, the circumferential surface on the high pressure chamber 18 side of the compressor body 1, is brought into contact with the inner surface of the inner annular wall 4, and the retaining edge 10 of the lip seal C is brought into close contact with the outer circumferential surface. , positioning the sliding portion 11 of the lip seal C in the circular hole 9 of the annular support plate B, and further press-fitting the O-ring 13 from the outside in the axial direction to abut against the outer circumferential surface of the retaining edge 10; The intermediate member D is press-fitted into the O-ring 13 in the radial direction, and the sliding part 11' of another lip seal C' is inserted into the through hole 12' of the intermediate member D. Bring the inner circumferential surface of the retaining edge 10' into close contact with the O-ring 13, and further fit the pressing member E from the outside to bring the pressing wall 16 into contact with the outer surface of the retaining edge 10' of the lip seal C'. In this state, the outer end of the hollow ring body 2 of the housing A is caulked or bent radially inward, and the outer edge of the cylindrical portion 15 of the pressing member E is pressed and held inward, The O-ring 13 is connected between the retaining edges 10 and 10' of both lip seals C and C', and between the inner wall of the hollow ring 2 of the housing A and the outer wall 14 of the intermediate member D.
It is completed by pressure contact between the After wrapping the O-ring 8 in the O-ring groove 5 of the housing A, the housing A is fitted into the compressor main body 1 and sealed, and the rotating shaft S is sealed with two lip seals C and C'. A high pressure chamber 18 is formed inside the compressor main body 1, and a space 19 is further formed between the lip seals C and C' to provide a double seal.
また、四弗化エチレン樹脂にグラフアイト微粒
子並びにカーボン繊維を充填したシール基材を用
いてリツプシールＣを形成することにより、耐熱
性、耐圧性、耐薬品性及び耐摩耗性等の耐久性に
優れ、更に該リツプシールＣは回転軸Ｓとの摩擦
熱及び雰囲気温度によつて、その摺動部１１には
元の平板状に戻ろうとする復元力が働くととも
に、更に封入流体の圧力とにより回転軸Ｓとの密
着性がより一層強くなり、高圧力に於いても該リ
ツプシールＣの基材の持つ低摩擦性により、回転
軸Ｓの負荷を増大させずに密封性を向上させるこ
とができる。例えば、実際に自動車空調用圧縮機
に本考案の２つのリツプシールＣ，C′を有する軸
封装置を装着した場合、100時間の連続使用での
封入油の平均洩れ量は0.02ｇであり、またひとつ
のリツプシールを有する他の軸封装置の場合の平
均洩れ量は0.20ｇであるので、本考案の軸封装置
は約10分の１と非常に少なく、極めて効果的であ
ることがわかる。 In addition, by forming Lipseal C using a sealing base material filled with graphite fine particles and carbon fibers in tetrafluoroethylene resin, it has excellent durability such as heat resistance, pressure resistance, chemical resistance, and abrasion resistance. Furthermore, the lip seal C exerts a restoring force on the sliding portion 11 to return to its original flat shape due to the frictional heat with the rotating shaft S and the ambient temperature, and furthermore, due to the pressure of the sealed fluid, the rotating shaft The adhesion with the lip seal C becomes even stronger, and the low friction of the base material of the lip seal C even under high pressure makes it possible to improve the sealing performance without increasing the load on the rotating shaft S. For example, when a shaft seal device having two lip seals C and C' of the present invention is actually installed in an automobile air conditioning compressor, the average amount of sealed oil leaks after 100 hours of continuous use is 0.02 g. Since the average amount of leakage in the case of other shaft sealing devices having one lip seal is 0.20 g, the shaft sealing device of the present invention has a very small leakage amount of about one-tenth, and is therefore extremely effective.
以上にしてなる本考案の軸封装置によれば、中
空環体の軸方向一側に半径方向内方へ外側環状壁
を延設し、他側には半径方向内方へ内側環状壁を
延設するとともに、外方へ開放したＯリング溝を
形成し、前記中空環体内壁と外側環状壁及び内側
環状壁とで内方へ開放した環状凹所を形成してな
るハウジングと、前記ハウジングの環状凹所に嵌
挿し得る外径を有するとともに、前記回転軸を挿
通し得る円孔を有する環状支持板と、前記環状支
持板の外周と略一致した外周の保持縁を有すると
ともに、該保持縁の中央部を軸方向一側へ膨出さ
せたコーン状の摺動部を有する二枚のリツプシー
ルと、前記リツプシールの保持縁間に介装すると
ともに、一方の摺動部を収容し得る通孔を有し且
つ前記環状凹所の内壁との間にＯリングを装着し
得る外壁を有する中間部材と、前記環状凹所に嵌
挿し且つ前記外側環状壁の内面に当接し得る外径
の円筒部を有するとともに、該円筒部の内縁を半
径方向内方へ前記リツプシールの保持縁を支持し
得る中空円板状の押圧壁を延設してなる押圧部材
とよりなるので、２つのリツプシール間に密封さ
れた空間部が形成され、高圧室の圧力と比較して
該空間部は減圧状態になつて、高圧室の圧力を該
空間部で分圧することができるので、それぞれの
リツプシールにかかる負担を分散することがで
き、内側のリツプシールで保持できずに該リツプ
シールと回転軸間から洩れ出た流体を外側のリツ
プシールで略完全に密封することができるととも
に、外側のリツプシールで外部からのごみやスラ
リーの侵入を防止でき、内側のリツプシールの摺
動部の損傷を防止できて、結果として軸封装置の
耐久性を増すことがでる。また、内外側２つのリ
ツプシール間とハウジングの密封を一つのＯリン
グで行つているので、密封性が良く構造も簡単で
強固にしかも安価に製造できるものである。
According to the shaft sealing device of the present invention as described above, the outer annular wall extends radially inward on one side of the hollow ring body in the axial direction, and the inner annular wall extends radially inward on the other side. and an O-ring groove that is open to the outside, and an annular recess that is open to the inside by the inner wall of the hollow ring, the outer annular wall, and the inner annular wall; an annular support plate having an outer diameter that can be fitted into the annular recess and a circular hole through which the rotating shaft can be inserted; and a retaining edge having an outer periphery that substantially coincides with an outer periphery of the annular support plate; two lip seals each having a cone-shaped sliding portion whose central portion bulges toward one side in the axial direction; and a through hole that is interposed between the retaining edge of the lip seal and that can accommodate one of the sliding portions. and an outer wall on which an O-ring can be attached between the inner wall of the annular recess and a cylindrical member with an outer diameter that can be fitted into the annular recess and abut on the inner surface of the outer annular wall. and a pressing member formed by extending the inner edge of the cylindrical portion radially inwardly with a pressing wall in the form of a hollow disc capable of supporting the holding edge of the lip seal, thereby creating a seal between the two lip seals. A space is formed in which the pressure in the high pressure chamber is reduced compared to the pressure in the high pressure chamber, and the pressure in the high pressure chamber can be divided in this space, distributing the burden on each lip seal. The outer lip seal can almost completely seal the fluid that cannot be held by the inner lip seal and leaks from between the lip seal and the rotating shaft. Intrusion can be prevented, damage to the sliding portion of the inner lip seal can be prevented, and the durability of the shaft seal device can be increased as a result. Furthermore, since a single O-ring seals between the inner and outer lip seals and the housing, the sealing performance is good, the structure is simple, strong, and can be manufactured at low cost.
そして、リツプシールを、四弗化エチレン樹脂
にグラフアイト微粒子並びにカーボン繊維を充填
した平板状のシール基材を、熱処理又は室温で成
形して形成することにより、一般的に使用される
ゴム製のリツプシールの場合に於いて、油滑の悪
い外側のリツプシールの熱劣化、焼付き及び摩耗
を防止することができて、より耐久性を増すこと
ができるものである。 Lip seals are formed by heat-treating or molding at room temperature a flat seal base material made of polytetrafluoroethylene resin filled with graphite fine particles and carbon fibers. In this case, it is possible to prevent thermal deterioration, seizure, and wear of the outer lip seal, which has poor oil lubricity, and to further increase durability.
第１図は本考案の軸封装置の分解斜視図、第２
図は軸封装置を圧縮機本体に装着して回転軸を密
封した状態を示した省略断面図である。
Ａ：ハウジング、Ｂ：環状支持板、Ｃ：リツプ
シール、Ｄ：中間部材、Ｅ：押圧部材、１：圧縮
機本体、２：中空環体、３：外側環状壁、４：内
側環状壁、５：Ｏリング溝、６：環状凹所、７：
凹部、８：Ｏリング、９：円孔、１０：保持縁、
１１：摺動部、１２：通孔、１３：Ｏリング、１
４：外壁、１５：円筒部、１６：押圧壁、１７：
円孔、１８：高圧室、１９：空間部。
Fig. 1 is an exploded perspective view of the shaft sealing device of the present invention;
The figure is an abbreviated sectional view showing a state in which a shaft sealing device is attached to a compressor main body and the rotating shaft is sealed. A: Housing, B: Annular support plate, C: Lip seal, D: Intermediate member, E: Pressing member, 1: Compressor body, 2: Hollow ring, 3: Outer annular wall, 4: Inner annular wall, 5: O-ring groove, 6: annular recess, 7:
recess, 8: O-ring, 9: circular hole, 10: retaining edge,
11: Sliding part, 12: Through hole, 13: O ring, 1
4: Outer wall, 15: Cylindrical part, 16: Pressing wall, 17:
Circular hole, 18: High pressure chamber, 19: Space part.
Claims (1)
軸と密封係合して本体内部に高圧室を形成する
軸封装置に於いて、 中空環体の軸方向一側に半径方向内方へ外側
環状壁を延設し、他側には半径方向内方へ内側
環状壁を延設するとともに、該内側環状壁の内
周縁を軸方向に沿つて外方へ延設し且つ半径方
向外方へ延設して外方へ開放したＯリング溝を
形成し、前記中空環体内壁と外側環状壁及び内
側環状壁とで内方へ開放した環状凹所を形成し
てなるハウジングと、 前記ハウジングの環状凹所に嵌挿し得る外径
を有するとともに、前記回転軸を挿通し得る円
孔を有する環状支持板と、 前記環状支持板の外周と略一致した外周の保
持縁を有するとともに、該保持縁の中央部を軸
方向一側へ膨出させたコーン状の摺動部を有す
る二枚のリツプシールと、 前記リツプシールの保持縁間に介装するとと
もに、一方の摺動部を収容し得る通孔を有し且
つ前記環状凹所の内壁との間にＯリングを装着
し得る外壁を有する中間部材と、 前記環状凹所に嵌挿し且つ前記外側環状壁の
内面に当接し得る外径の円筒部を有するととも
に、該円筒部の内縁を半径方向内方へ前記リツ
プシールの保持縁を支持し得る中空円板状の押
圧壁を延設してなる押圧部材と、 よりなる軸封装置。 ２ 前記リツプシールとして、カーボン繊維とグ
ラフアイトを充填した四弗化エチレン樹脂製の
リツプシールを用いてなる実用新案登録請求の
範囲第１項記載の軸封装置。 ３ 前記ハウジングの外側環状壁として、内縁部
の一部を切欠して該ハウジング着脱用の凹部を
形成した外側環状壁としてなる実用新案登録請
求の範囲第１項記載の軸封装置。[Claims for Utility Model Registration] 1. In a shaft sealing device that is hermetically attached to a main body having a rotating shaft and sealingly engages with the rotating shaft to form a high pressure chamber inside the main body, an outer annular wall extending radially inward on one side; an inner annular wall extending radially inward on the other side; and an inner peripheral edge of the inner annular wall extending axially outward. and an O-ring groove extending radially outward to form an outwardly open O-ring groove, and the hollow ring inner wall, an outer annular wall, and an inner annular wall forming an inwardly open annular recess. an annular support plate having an outer diameter that can be fitted into an annular recess of the housing and a circular hole through which the rotating shaft can be inserted; two lip seals having edges and a cone-shaped sliding portion in which the central portion of the retaining edge bulges toward one side in the axial direction; an intermediate member having an outer wall having a through hole capable of accommodating a moving part and capable of mounting an O-ring between the intermediate member and the inner wall of the annular recess; A pressing member having a cylindrical portion with an outer diameter that can be abutted, and a pressing wall in the form of a hollow disc extending radially inward from the inner edge of the cylindrical portion and capable of supporting the retaining edge of the lip seal; A shaft sealing device. 2. The shaft sealing device according to claim 1, wherein the lip seal is a lip seal made of tetrafluoroethylene resin filled with carbon fiber and graphite. 3. The shaft sealing device according to claim 1, wherein the outer annular wall of the housing is an outer annular wall in which a part of the inner edge is cut out to form a recess for attaching and detaching the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986177421U JPH025159Y2 (en) | 1986-11-18 | 1986-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986177421U JPH025159Y2 (en) | 1986-11-18 | 1986-11-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6382865U JPS6382865U (en) | 1988-05-31 |
| JPH025159Y2 true JPH025159Y2 (en) | 1990-02-07 |
Family
ID=31118606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986177421U Expired JPH025159Y2 (en) | 1986-11-18 | 1986-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025159Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0721969Y2 (en) * | 1989-02-22 | 1995-05-17 | イーグル工業株式会社 | Lip seal |
| JPH0723654Y2 (en) * | 1989-05-15 | 1995-05-31 | イーグル工業株式会社 | Lip seal |
-
1986
- 1986-11-18 JP JP1986177421U patent/JPH025159Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6382865U (en) | 1988-05-31 |
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