JPS6123717Y2 - - Google Patents
Info
- Publication number
- JPS6123717Y2 JPS6123717Y2 JP15885580U JP15885580U JPS6123717Y2 JP S6123717 Y2 JPS6123717 Y2 JP S6123717Y2 JP 15885580 U JP15885580 U JP 15885580U JP 15885580 U JP15885580 U JP 15885580U JP S6123717 Y2 JPS6123717 Y2 JP S6123717Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- housing
- seal ring
- rotating member
- inner hole
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 8
- 229920003051 synthetic elastomer Polymers 0.000 claims description 7
- 239000005061 synthetic rubber Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Multiple-Way Valves (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】
本考案は各種の流体機器におけるシール構造、
特にハウジングの内孔内にて回転する回転部材の
外周溝内に四弗化エチレン樹脂(商標名、テフロ
ン)を主体とするシールリングを収納して該シー
ルリングにより内孔の内周壁と回転部材の外周面
間をシールするようにしたシール構造の改良に関
するものである。[Detailed description of the invention] This invention is a seal structure for various fluid devices,
In particular, a seal ring mainly made of tetrafluoroethylene resin (trade name, Teflon) is housed in the outer circumferential groove of the rotating member that rotates within the inner hole of the housing, and the seal ring connects the inner circumferential wall of the inner hole to the rotating member. This invention relates to an improvement in a seal structure that seals between the outer circumferential surfaces of.
従来、例えばラツク・ピニオン式動力舵取装置
に使用されるロータリーバルブにおいては、第1
図に示したように、ハウジング10の内孔11内
にて回転する筒体の弁体12の各外周溝12a内
にシールリング13を収納して、これら各シール
リング13により流入孔10aから流出孔10
b、10cに選択的に流れる圧力油の洩れを防止
している。この場合、一般にハウジング10はア
ルミニウム等の軟質金属からなり一方筒状の弁体
12は鉄等の硬質金属からなるため、シールリン
グ13としてガラス繊維を含有する四弗化エチレ
ン樹脂からなるシールリングを採用すると、弁体
12の回転によつて内孔11の内壁面が摩耗し、
第2図に示したような段付摩耗Dが発生する。こ
のため、シールリング13のシール性能が劣化す
るとともに回転摩擦力が増大する等の不具合を惹
起する。このような不具合に対処するためには、
ハウジング10の材質を硬質金属に変更したり、
内孔11の内周壁面にアルミナ層を形成したり、
或いは鉄製のライナを鋳込んだりする等の対策が
考えられるも、これらの対策は生産コストを高
め、また重量増加の原因にもなつて得策とはいえ
ない。 Conventionally, for example, in a rotary valve used in a rack-and-pinion power steering device, the first
As shown in the figure, seal rings 13 are housed in the respective outer circumferential grooves 12a of the cylindrical valve body 12 that rotates within the inner hole 11 of the housing 10, and the seal rings 13 allow the flow to flow out from the inlet hole 10a. hole 10
This prevents leakage of the pressure oil that selectively flows to ports b and 10c. In this case, the housing 10 is generally made of a soft metal such as aluminum, while the cylindrical valve body 12 is made of a hard metal such as iron, so the seal ring 13 is made of tetrafluoroethylene resin containing glass fiber. When adopted, the inner wall surface of the inner hole 11 is worn out due to the rotation of the valve body 12,
Stepped wear D as shown in FIG. 2 occurs. This causes problems such as the sealing performance of the seal ring 13 deteriorating and the rotational frictional force increasing. To deal with such problems,
Changing the material of the housing 10 to hard metal,
Forming an alumina layer on the inner peripheral wall surface of the inner hole 11,
Alternatively, countermeasures such as casting an iron liner can be considered, but these countermeasures increase production costs and cause an increase in weight, so they are not a good idea.
本考案は、上記の問題に着目して案出されたも
ので、その要旨とするところは、ハウジングおよ
びその内孔内にて回転する回転部材のいずれか一
方の部材をアルミニウム等軟質金属にて形成しか
つ他方の部材を鉄等硬質金属にて形成してなり、
前記回転部材の外周溝内に四弗化エチレン樹脂を
主体とするシールリングを収納して該シールリン
グにより前記ハウジングの内孔の内周壁と前記回
転部材の外周面間をシールするようにしたシール
構造において、前記シールリングの前記一方の部
材との接触面に合成ゴム等前記シールリングに比
して摩擦係数の大なるシール部材を添着したこと
を特徴とするものである。すなわち、本考案にお
いては、ハウジングが軟質金属からなりその内孔
内にて回転する筒状弁体等の回転部材が硬質金属
からなる場合には内孔の内周壁に対するシールリ
ングの接触面にシールリングに比して摩擦係数の
大なるシール部材を添着してシールリングと回転
部材間にのみ相対的な回転を許容し、またハウジ
ングが硬質金属からなり回転部材が軟質金属から
なる場合には回転部材に対するシールリングの接
触面にシールリングに比して摩擦係数の大なるシ
ール部材を添着してシールリングと内孔の内周壁
間にのみ相対的な回転を許容するようしたことに
ある。 The present invention was devised focusing on the above-mentioned problem, and its gist is that either the housing or the rotary member that rotates within its inner hole is made of a soft metal such as aluminum. and the other member is made of a hard metal such as iron,
A seal comprising a seal ring mainly made of tetrafluoroethylene resin is housed in an outer circumferential groove of the rotating member, and the seal ring seals between the inner circumferential wall of the inner hole of the housing and the outer circumferential surface of the rotating member. The structure is characterized in that a seal member such as synthetic rubber having a larger coefficient of friction than the seal ring is attached to the contact surface of the seal ring with the one member. That is, in the present invention, when the housing is made of a soft metal and the rotating member such as a cylindrical valve body that rotates in the inner hole is made of a hard metal, a seal is provided on the contact surface of the seal ring against the inner circumferential wall of the inner hole. A seal member with a larger coefficient of friction than the ring is attached to allow relative rotation only between the seal ring and the rotating member, and if the housing is made of hard metal and the rotating member is made of soft metal, rotation is prevented. A seal member having a larger friction coefficient than the seal ring is attached to the contact surface of the seal ring with respect to the member, so that relative rotation is allowed only between the seal ring and the inner circumferential wall of the inner hole.
以下に本考案の実施例を図面を参照して説明す
ると、第3図において、符号20はアルミニウム
等ハウジングの一部を示し、符号22はハウジン
グ20の内孔21内に回転する鉄等の回転部材を
示し、また符号23はガラス繊維を含有する四弗
化エチレン樹脂に成形したシールリングを示して
いる。しかして、この実施例においては、シール
リング23の外周面にシールリングに比して摩擦
係数の大なる合成ゴム製シール部材24を焼付に
より一体的に添着したことにその特徴があり、こ
れによりシールリング23は図示矢印方向から圧
力油が作用したとき回転部材22の外周溝22a
内にて内孔21の内周壁と外周溝22aの側端面
に押し付けられ、かかる状態にて回転部材22が
回転すると、シールリング23はシール部材24
の摩擦力によつて内孔21の内周壁側に固定され
回転部材22に対してのみ相対的に摺接する。こ
のため、ハウジング20が軟質金属があつても摩
耗することなく保護され、シールリング23は硬
質金属からなる回転部材22との摺接によつてそ
のシール性能を適確に発揮する。 Embodiments of the present invention will be described below with reference to the drawings. In FIG. The members are shown, and numeral 23 indicates a seal ring molded from tetrafluoroethylene resin containing glass fibers. A feature of this embodiment is that a synthetic rubber sealing member 24, which has a larger coefficient of friction than the sealing ring, is integrally attached to the outer peripheral surface of the sealing ring 23 by baking. The seal ring 23 is inserted into the outer circumferential groove 22a of the rotating member 22 when pressure oil is applied from the direction of the arrow shown in the figure.
When the rotary member 22 rotates in this state, the seal ring 23 is pressed against the inner circumferential wall of the inner hole 21 and the side end surface of the outer circumferential groove 22a.
It is fixed to the inner circumferential wall side of the inner hole 21 by the frictional force of , and makes relative sliding contact only with the rotating member 22 . Therefore, the housing 20 is protected from wear even if there is a soft metal, and the seal ring 23 properly exhibits its sealing performance through sliding contact with the rotating member 22 made of hard metal.
第4図は、第3図に示したハウジング20が鉄
製で回転部材22がアルミニウム製である場合に
実施例を示していて、この実施例においてはシー
ルリング23の一側面にシールリングに比して摩
擦係数の大なる合成ゴム製シール部材24aを焼
付により一体的に固着したことにその特徴があ
り、これによりシールリング23は図示矢印方向
から圧力油が作用した状態にて回転部材22′が
回転するとシール部材24aの摩擦力によつて回
転部材22′と共に回転する。このため、回転部
材22′が軟質金属であつても摩耗することなく
保護され、シールリング23は硬質金属からなる
ハウジング20′の内周壁面との摺接によつてそ
のシール性能を発揮する。 FIG. 4 shows an embodiment in which the housing 20 shown in FIG. 3 is made of iron and the rotating member 22 is made of aluminum. Its characteristic lies in that the synthetic rubber sealing member 24a, which has a large coefficient of friction, is integrally fixed by baking, and as a result, the sealing ring 23 is rotated by the rotating member 22' when pressure oil is applied from the direction of the arrow in the figure. When it rotates, it rotates together with the rotary member 22' due to the frictional force of the seal member 24a. Therefore, even if the rotating member 22' is made of a soft metal, it is protected from wear, and the seal ring 23 exhibits its sealing performance by slidingly contacting the inner peripheral wall surface of the housing 20' made of a hard metal.
なお、上記実施例においてはいずれもシールリ
ング23の一方向からのみ圧力油が作用する例に
ついて説明したが、例えばハウジング20がアル
ミニウム製で回転部材22が鉄製である場合にお
いて、第5図に示したように環状の合成ゴム製シ
ール部材24bの両面に四弗化エチレン樹脂製シ
ールリング23b,23bを接着して、シール部
材24bを圧力油の作用によりハウジング内孔2
1の内周壁面に圧着させ、いずれか一方のシール
リング23bが回転部材22の外周溝22aの一
側端面と摺接する滑り面を形成するようにしても
よく、或いは第6図に示したように四弗化エチレ
ン樹脂シールリング23cの外周に合成ゴム製O
リング25を嵌め込んでOリング25を圧力油の
作用によりハウジング内孔21の内周壁面に圧着
させ、シールリング23cのいずれか一方の側面
が回転部材22の外周溝22aの一側端面と摺接
する滑り面を形成するようにしてもよい。 In each of the above embodiments, an example was explained in which pressure oil acts only from one direction on the seal ring 23. However, for example, when the housing 20 is made of aluminum and the rotating member 22 is made of iron, the case shown in FIG. As shown above, the seal rings 23b, 23b made of tetrafluoroethylene resin are adhered to both sides of the annular synthetic rubber seal member 24b, and the seal member 24b is sealed into the housing inner hole 2 by the action of pressure oil.
1, and one of the seal rings 23b may form a sliding surface that slides against one end surface of the outer circumferential groove 22a of the rotating member 22, or as shown in FIG. A synthetic rubber O is attached to the outer periphery of the tetrafluoroethylene resin seal ring 23c.
The ring 25 is fitted and the O-ring 25 is pressed against the inner peripheral wall surface of the housing inner hole 21 by the action of pressure oil, so that one side surface of the seal ring 23c slides against one end surface of the outer peripheral groove 22a of the rotating member 22. A contacting sliding surface may also be formed.
以上詳述したとおり、本考案によれば、ハウジ
ングが軟質金属からなりその内孔内にて回転する
筒状体等の回転部材が硬質金属からなる場合に
は、内孔の内周壁に対する四弗化エチレン樹脂製
シールリングの接触面にシールリングに比して摩
擦係数の大なるシール部材を添着して、シールリ
ングと回転部材間のみ相対的な回転を許容し、ま
たハウジングが軟質金属からなり回転部材が軟質
金属からなる場合には、回転部材に対するシール
リングの接触面にシールリングに比して摩擦係数
の大なるシール部材を添着して、シールリングと
内孔の内周壁間にのみ相対的な回転を許容するよ
うにしたので、軟質金属からなる回転部材のシー
ルリングによる摩耗を防止して当該部位における
シール性能の低下を防止することができるととも
に、摩耗金属粉による他のシール面、摺動面、オ
リフイス等の部分への悪影響をなくすことができ
る。さらに、上記の構成によれば摩擦係数の大な
るシール部材にてシール性能を向上させ、シール
リングにありがちな吹き抜け現象が最小限に防ぐ
ことができ、またシールリングによるシール面が
一ケ所になるため0℃以下の低温時におけるシー
ル性の劣化を極力抑制することができる。 As detailed above, according to the present invention, when the housing is made of a soft metal and the rotating member such as a cylindrical body that rotates in the inner hole is made of a hard metal, the A seal member with a larger friction coefficient than the seal ring is attached to the contact surface of the seal ring made of ethylene chloride resin, allowing relative rotation only between the seal ring and the rotating member, and the housing is made of soft metal. When the rotating member is made of soft metal, a sealing member with a larger friction coefficient than the seal ring is attached to the contact surface of the seal ring with the rotating member, so that there is only a gap between the seal ring and the inner circumferential wall of the inner hole. This allows rotation of the rotary member made of soft metal by the seal ring, thereby preventing deterioration of sealing performance in the area, and preventing other seal surfaces from being damaged by worn metal powder. It is possible to eliminate adverse effects on parts such as sliding surfaces and orifices. Furthermore, according to the above configuration, the sealing performance is improved by using a sealing member with a large coefficient of friction, the blow-through phenomenon that often occurs with seal rings can be prevented to a minimum, and the sealing surface by the seal ring is in one place. Therefore, deterioration of sealing performance at low temperatures of 0° C. or lower can be suppressed as much as possible.
なお、前者の場合においては特にシールリング
の滑り面がハウジング内壁よりも内側に位置しそ
の分だけ摩擦半径が小さくなつて回転摩耗力を抵
減させることができる。 In the former case, in particular, the sliding surface of the seal ring is located inside the inner wall of the housing, and the radius of friction becomes smaller accordingly, making it possible to reduce rotational wear force.
第1図は本考案が適用されるロータリーバルブ
の一例を示す断面図、第2図は従来のシール構造
を示す部分断面図、第3図〜第6図は本考案の各
実施例を示す部分断面図である。
符号の説明、20……軟質金属からなるハウジ
ング、20′……硬質金属からなるハウジング、
21……内孔、22……硬質金属からなる回転部
材、22′……軟質金属からなる回転部材、23
………四弗化エチレン樹脂を主体とするシールリ
ング、24……合成ゴム製シール部材。
Fig. 1 is a sectional view showing an example of a rotary valve to which the present invention is applied, Fig. 2 is a partial sectional view showing a conventional seal structure, and Figs. 3 to 6 are parts showing each embodiment of the present invention. FIG. Explanation of symbols, 20...Housing made of soft metal, 20'...Housing made of hard metal,
21... Inner hole, 22... Rotating member made of hard metal, 22'... Rotating member made of soft metal, 23
...Seal ring mainly made of tetrafluoroethylene resin, 24...Synthetic rubber seal member.
Claims (1)
部材のいずれか一方の部材をアルミニウム等軟質
金属にて形成しかつ他方の部材を鉄等硬質金属に
て形成してなり、前記回転部材の外周溝内に四弗
化エチレン樹脂を主体するシールリングを収納し
て該シールリングにより前記ハウジング内孔の内
周壁と前記回転部材の外周面間をシールするよう
にしたシール構造において、前記シールリングの
前記一方の部材との接触面に合成ゴム等前記シー
ルリングに比して摩擦係数の大なるシール部材を
添着したことを特徴とするシール構造。 One of the housing and the rotary member that rotates in its inner hole is made of a soft metal such as aluminum, and the other member is made of a hard metal such as iron, and the outer circumferential groove of the rotary member is A sealing structure in which a sealing ring mainly made of tetrafluoroethylene resin is housed in the housing, and the sealing ring seals between the inner circumferential wall of the housing inner hole and the outer circumferential surface of the rotating member, wherein the one of the sealing rings A seal structure characterized in that a seal member such as synthetic rubber having a larger coefficient of friction than the seal ring is attached to the contact surface with the member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15885580U JPS6123717Y2 (en) | 1980-11-05 | 1980-11-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15885580U JPS6123717Y2 (en) | 1980-11-05 | 1980-11-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5780762U JPS5780762U (en) | 1982-05-19 |
JPS6123717Y2 true JPS6123717Y2 (en) | 1986-07-16 |
Family
ID=29517901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15885580U Expired JPS6123717Y2 (en) | 1980-11-05 | 1980-11-05 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6123717Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2134604B (en) * | 1983-01-28 | 1986-03-12 | Cross Mfg Co | Rotatable shaft seals |
-
1980
- 1980-11-05 JP JP15885580U patent/JPS6123717Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5780762U (en) | 1982-05-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3554559A (en) | Seal | |
JPS60220269A (en) | Unitable seal and method | |
JPH0416656B2 (en) | ||
US3480285A (en) | Mechanical shaft seal | |
JPS58121363A (en) | Shaft sealing device | |
JPS6123717Y2 (en) | ||
JPH0794869B2 (en) | Cassette type packing | |
JPH0514051Y2 (en) | ||
US4289318A (en) | Hydraulic motor balancing ring seal | |
US3976406A (en) | Oil seal means of a rotary piston engine | |
US4426089A (en) | Dust-proof device for mechanical seal | |
JP4649811B2 (en) | Sealing device | |
US4397446A (en) | Integral seal | |
JPH026303Y2 (en) | ||
JPH0210381Y2 (en) | ||
JPH063227Y2 (en) | Sealing device assembly | |
JPH0547900Y2 (en) | ||
JPH043159Y2 (en) | ||
JPH073114Y2 (en) | Via-type fluid supply device in rotary shaft | |
JPH0536166U (en) | Sealing device | |
JP2814133B2 (en) | Rotary shaft sealing device | |
JPH0614139Y2 (en) | Sealing device | |
JPH0689851B2 (en) | Sealing device assembly | |
JPH0228277Y2 (en) | ||
JPS633495Y2 (en) |