JPH0448371Y2 - - Google Patents
Info
- Publication number
- JPH0448371Y2 JPH0448371Y2 JP1987186439U JP18643987U JPH0448371Y2 JP H0448371 Y2 JPH0448371 Y2 JP H0448371Y2 JP 1987186439 U JP1987186439 U JP 1987186439U JP 18643987 U JP18643987 U JP 18643987U JP H0448371 Y2 JPH0448371 Y2 JP H0448371Y2
- Authority
- JP
- Japan
- Prior art keywords
- lip
- outer diameter
- metal
- buried
- diameter portion
- 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
- 239000002184 metal Substances 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010721 machine oil 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、たとえばコンプレツサなどの機器の
回転軸周を密封するリツプ型シールの改良に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a lip-type seal that seals around the rotating shaft of equipment such as a compressor.
従来から、例えばカークーラーのコンプレツサ
に使用される軸封装置として、第５図に示すよう
に、密封空間Ａ側のゴム材製の第一のリツプ３
と、その反密封空間（大気）Ｂ側の第二のリツプ
６と、この第二のリツプ６をその反密封空間Ｂ側
から支承するとともに背面にダストリツプ８が焼
き付けられた金属バツクアツプリング７と、第一
のリツプ３の外径部３ｂおよび該リツプ３と一体
のゴム材からなる外周装着部４に内向き鍔部９を
含む一端が焼き付け埋設されるとともに内周に前
記第二のリツプ６およびバツクアツプリング７を
組み付け固定してなる金属外環５とを備えたリツ
プ型シールが知られている。
Conventionally, as shown in FIG. 5, a first lip 3 made of rubber material on the side of the sealed space A has been used as a shaft sealing device used in a car cooler compressor, for example.
, a second lip 6 on the anti-sealed space (atmosphere) B side, and a metal back-up ring 7 that supports this second lip 6 from the anti-sealed space B side and has a dust lip 8 baked on its back surface. , one end including the inward flange 9 is baked and buried in the outer diameter part 3b of the first lip 3 and the outer circumferential attachment part 4 made of a rubber material integral with the lip 3, and the second lip 6 is attached to the inner circumference. A lip type seal is known which includes a metal outer ring 5 formed by assembling and fixing a back-up spring 7.
このリツプ型シールは、金属外環５で補強され
た前記外周装着部６がコンプレツサハウジング１
内周面に密嵌され、該ハウジング１の内周段差部
１ａに、第一のリツプ３の外径部３ｂおよび外周
装着部４における接液側端面４ａが当接した状態
に位置決め固定されて、各リツプ３，６，８の内
径端部３ａ，６ａ，８ａが回転軸２の外周面と気
密摺接することによつて軸封機能を営むものであ
る。 In this lip type seal, the outer peripheral mounting portion 6 reinforced with a metal outer ring 5 is attached to the compressor housing 1.
It is tightly fitted to the inner circumferential surface, and is positioned and fixed in such a state that the outer diameter portion 3b of the first lip 3 and the liquid contact side end surface 4a of the outer circumferential mounting portion 4 are in contact with the inner circumferential stepped portion 1a of the housing 1. , the inner diameter ends 3a, 6a, 8a of each lip 3, 6, 8 perform a shaft sealing function by making airtight sliding contact with the outer peripheral surface of the rotating shaft 2.
しかしながら、上記従来の構成によると、回転
軸２との摺動トルクによつて、第二のリツプ６が
第一のリツプ３とバツクアツプリング７との間で
スリツプすることがないように、第二のリツプ６
の外径部６ｂに対する所定の挟持力を維持する必
要から、金属外環５の内向き鍔部９は、第一のリ
ツプ３の外径部３ｂの第二のリツプ６側に偏在し
た位置に埋設されており、したがつて、ハウジン
グ１の内周に圧入された当該リツプ型シールは、
ハウジング１の内周段差部１ａに対してゴム材か
らなる接液側端面４ａが当接するため、ゴム材の
弾性によつて収まりが悪く、したがつてリツプ型
シールを軸方向に対して精度良く位置決めして安
定的に組み付けることができず、しかも、ゴム材
からなる前記外周装着部４が前記内周段差部１ａ
の内周縁の喰い込みによつて破損し易くなり、運
転時のリツプ型シールの振れも増大し易く、シー
ル機能に悪影響を及ぼしていた。
However, according to the above-mentioned conventional configuration, the second lip 6 is prevented from slipping between the first lip 3 and the backup spring 7 due to the sliding torque with the rotating shaft 2. Second lip 6
In order to maintain a predetermined clamping force on the outer diameter portion 6b of the first lip 3, the inward flange portion 9 of the metal outer ring 5 is located at a position unevenly distributed on the second lip 6 side of the outer diameter portion 3b of the first lip 3. The lip-type seal is buried and is therefore press-fitted into the inner circumference of the housing 1.
Since the end surface 4a on the liquid contact side made of a rubber material comes into contact with the inner circumferential stepped portion 1a of the housing 1, it is difficult to fit due to the elasticity of the rubber material. It is difficult to position and assemble stably, and furthermore, the outer circumferential mounting portion 4 made of a rubber material is attached to the inner circumferential stepped portion 1a.
The inner peripheral edge of the lip seal is likely to be damaged due to biting, and the deflection of the lip seal during operation is also likely to increase, which has an adverse effect on the sealing function.
本考案のリツプ型シールは、このような点に鑑
み、ハウジングへの組み付けの不安定さによるシ
ール機能の低下を来さないようにすることを目的
としてなされたものである。 In view of these points, the lip type seal of the present invention was designed to prevent the sealing function from being degraded due to instability of assembly into the housing.
上記課題を解決するため、本考案は、金属外環
の一端に焼き付けられたゴム製の外周装着部から
一体に延びる密封空間側の第一のリツプと、前記
金属外環の内周に固定された金属バツクアツプリ
ングと、このバツクアツプリングと前記第一のリ
ツプとの間に外径部が挟着された反密封空間側の
第二のリツプとを備えたリツプ型シールにおい
て、前記金属外環の一端に形成された内向き鍔部
に、前記外周装着部および第一のリツプ外径部の
接液側端面から露出してハウジングの内周段差部
と当接する露出部と、第一のリツプ外径部の内部
に埋没する埋没部とを周方向に交互に設けたもの
である。
In order to solve the above problems, the present invention has a first lip on the side of the sealed space that extends integrally from a rubber outer circumferential attachment part baked on one end of the metal outer ring, and a first lip that is fixed to the inner circumference of the metal outer ring. A lip-type seal comprising a metal back-up spring having a cylindrical shape, and a second lip on the side opposite to the sealed space, the outer diameter of which is sandwiched between the back-up ring and the first lip. An exposed portion that is exposed from the liquid contact side end surface of the outer circumferential mounting portion and the first lip outer diameter portion and comes into contact with the inner circumferential step portion of the housing, on the inward flange portion formed at one end of the ring; Buried portions buried inside the outer diameter portion of the lip are alternately provided in the circumferential direction.
上記構成によると、金属外環の内向き鍔部に形
成された露出部がゴムからなる外周装着部および
第一のリツプ外径部の接液側端面から露出してハ
ウジングの内周段差部に金属接触することから、
ゴム接触による軸方向への装着精度の不安定さを
解消し、しかも、この露出部と交互に前記内向き
鍔部に形成された埋没部が第一のリツプの外径部
内に埋没していて、その分だけ第二のリツプ側へ
突出していることから、該第一のリツプの外径部
とバツクアツプリングの間での第二のリツプの外
径部に対する良好な挟持力を維持する。
According to the above configuration, the exposed portion formed on the inward flange of the metal outer ring is exposed from the rubber outer peripheral mounting portion and the liquid contact side end surface of the first lip outer diameter portion and reaches the inner peripheral stepped portion of the housing. Due to metal contact,
The instability of the mounting accuracy in the axial direction due to rubber contact is eliminated, and the buried part formed in the inward flange part is buried in the outer diameter part of the first lip alternately with the exposed part. , which protrudes toward the second lip side by that amount, maintaining a good clamping force on the outer diameter portion of the second lip between the outer diameter portion of the first lip and the back-up ring.
以下、本考案を、第１図ないし第３図に示す一
実施例を参照しながら説明する。なお、先に述べ
た第５図の従来構造のものと同一の部分には同一
符号を付し、その説明は省略する。
Hereinafter, the present invention will be explained with reference to an embodiment shown in FIGS. 1 to 3. Incidentally, the same parts as those of the conventional structure shown in FIG. 5 described above are given the same reference numerals, and the explanation thereof will be omitted.
すなわち本考案のリツプ型シールは、金属外環
５の内向き鍔部９に放射状に延びる凹凸を形成す
ることによつて、ゴム材からなる外周装着部４お
よびこれと一体である第一のリツプ３の外径部３
ｂの接液側端面から露出してハウジング１の内周
段差部１ａと当接する露出部９ａと、第一のリツ
プ３の外径部３ｂの内部における第二のリツプ６
側へ埋没した埋没部９ｂとを周方向に交互に等配
状に設けたものである。 That is, the lip-type seal of the present invention has a radially extending unevenness formed on the inwardly facing flange 9 of the metal outer ring 5, thereby attaching the outer peripheral mounting part 4 made of a rubber material and the first lip integral therewith. 3 outer diameter part 3
an exposed portion 9a that is exposed from the end surface on the liquid contact side of b and comes into contact with the inner peripheral stepped portion 1a of the housing 1; and a second lip 6 inside the outer diameter portion 3b of the first lip 3.
The buried portions 9b buried toward the sides are provided alternately and equidistantly in the circumferential direction.
したがつて、本考案の構成においては、内向き
鍔部９の露出部９ａとハウジング１の内周段差部
１ａの金属接触によつて、軸方向への位置決め精
度が向上し、安定的に組み付けることができる。
また、この露出部９ａと交互に形成された埋没部
９ｂが第一のリツプ３の外径部３ｂ内で第二のリ
ツプ６側の位置に埋没していることから、該第一
のリツプ３の外径部３ｂとバツクアツプリング７
の間での第二のリツプ６の外径部６ｂに対する良
好な挟持力が維持され、しかも埋没部９ｂは周方
向に断続したものであるため、第一のリツプ３の
外径部３ｂの背面と、第二のリツプ６の外径部６
ｂとの周方向のスリツプトルクが増大し、シール
性をきわめて安定化させることができる。 Therefore, in the configuration of the present invention, the metal contact between the exposed portion 9a of the inward flange portion 9 and the inner circumferential stepped portion 1a of the housing 1 improves the positioning accuracy in the axial direction, and allows for stable assembly. be able to.
Furthermore, since the buried portions 9b formed alternately with the exposed portions 9a are buried within the outer diameter portion 3b of the first lip 3 at a position on the second lip 6 side, the first lip 3 outer diameter portion 3b and back-up spring 7
A good clamping force on the outer diameter part 6b of the second lip 6 is maintained between the two, and since the buried part 9b is discontinuous in the circumferential direction, the back surface of the outer diameter part 3b of the first lip 3 is maintained. and the outer diameter portion 6 of the second lip 6
The slip torque in the circumferential direction with respect to b is increased, and the sealing performance can be extremely stabilized.
ところで、上記した本考案構造および従来構造
のリツプ型シールをカークーラーに実装して、圧
力が２Kg／cm2Ｇ、回転数が6500rpm、温度が80℃
の条件下で、冷凍機油を密封流体として漏洩量の
比較試験を行なつた結果、第４図に示すように、
本考案のリツプ型シール（プロツト：Δ）は、従
来のリツプ型シール（プロツト：○）と比較して
漏れが大幅に減少することが判明した。 By the way, when the lip type seals of the above-described structure of the present invention and the conventional structure were installed in a car cooler, the pressure was 2 Kg/cm 2 G, the rotation speed was 6500 rpm, and the temperature was 80°C.
As shown in Figure 4, we conducted a comparative test of the amount of leakage under the following conditions using refrigerating machine oil as a sealing fluid.
It has been found that the lip type seal of the present invention (plot: Δ) significantly reduces leakage compared to the conventional lip type seal (prot: ○).
なお、本考案は、上記実施例にとくに限定され
るものでないことは勿論である。 Incidentally, it goes without saying that the present invention is not particularly limited to the above embodiments.
以上、本考案によると、金属外環の内向き鍔部
に、ゴムからなる接液側端面から露出してハウジ
ングの内周段差部に金属接触する露出部と、第一
のリツプの外径部内に埋没して第二のリツプの外
径部を挟圧する埋没部を周方向に交互に設けたこ
とから、第一のリツプの外径部とバツクアツプリ
ングの間での第二のリツプの外径部に対する良好
な挟持力を維持してスリツプトルクを向上させる
と同時に、軸方向への位置決め精度を向上させて
組み付けの不安定さを解消することができるの
で、長期間安定した密封性を維持することができ
る。
As described above, according to the present invention, the inward flange of the metal outer ring has an exposed part that is exposed from the liquid contact side end surface made of rubber and makes metal contact with the inner circumferential stepped part of the housing, and an inner part of the outer diameter part of the first lip. Since buried parts are provided alternately in the circumferential direction to compress the outer diameter part of the second lip by being buried in the outer diameter part of the second lip, the outer diameter part of the second lip is It maintains good clamping force on the diameter part to improve slip torque, and at the same time improves axial positioning accuracy and eliminates assembly instability, maintaining stable sealing performance for a long time. can do.
第１図は本考案に係るリツプ型シールの一実施
例を示す半裁断面図、第２図は同じく金属外環の
正面図、第３図は第２図の−線における断面
図、第４図は本考案のリツプ型シールと従来のリ
ツプ型シールとの時間による漏洩量の比較試験の
結果を示す説明図、第５図は従来のリツプ型シー
ルの半裁断面図である。
１……ハウジング、１ａ……内周段差部、３…
…第一のリツプ、３ｂ，６ｂ……外径部、４……
外周装着部、５……金属外環、６……第二のリツ
プ、７……バツクアツプリング、９……内向き鍔
部、９ａ……露出部、９ｂ……埋没部、Ａ……密
封空間、Ｂ……反密封空間。
Fig. 1 is a half-cut sectional view showing an embodiment of the lip-type seal according to the present invention, Fig. 2 is a front view of the metal outer ring, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4. 5 is an explanatory diagram showing the results of a comparative test of the amount of leakage over time between the lip-type seal of the present invention and a conventional lip-type seal, and FIG. 5 is a half-cut sectional view of the conventional lip-type seal. 1...Housing, 1a...Inner circumference stepped portion, 3...
...First lip, 3b, 6b... Outer diameter part, 4...
Outer circumference attachment part, 5...Metal outer ring, 6...Second lip, 7...Backup spring, 9...Inward flange, 9a...Exposed part, 9b...Buried part, A...Sealing Space, B...anti-sealed space.
Claims (1)
装着部から一体に延びる密封空間側の第一のリツ
プと、前記金属外環の内周に固定された金属バツ
クアツプリングと、このバツクアツプリングと前
記第一のリツプとの間に外径部が挟着された反密
封空間側の第二のリツプとを備えたリツプ型シー
ルにおいて、前記金属外環の一端に形成された内
向き鍔部に、前記外周装着部および第一のリツプ
外径部の接液側端面から露出してハウジングの内
周段差部と当接する露出部と、第一のリツプ外径
部の内部に埋没する埋没部とを周方向に交互に設
けたことを特徴とするリツプ型シール。 A first lip on the side of the sealed space that extends integrally from a rubber outer circumferential attachment part baked on one end of the metal outer ring, a metal back-up ring fixed to the inner periphery of the metal outer ring, and this back-up spring. and a second lip on the side opposite to the sealed space whose outer diameter portion is sandwiched between the first lip and the inward flange formed at one end of the metal outer ring. an exposed portion that is exposed from the liquid contact side end surface of the outer peripheral mounting portion and the first lip outer diameter portion and comes into contact with the inner peripheral stepped portion of the housing; and a buried portion that is buried inside the first lip outer diameter portion. A lip-type seal characterized by having and alternately provided in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987186439U JPH0448371Y2 (en) | 1987-12-09 | 1987-12-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987186439U JPH0448371Y2 (en) | 1987-12-09 | 1987-12-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0191164U JPH0191164U (en) | 1989-06-15 |
| JPH0448371Y2 true JPH0448371Y2 (en) | 1992-11-13 |
Family
ID=31477668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987186439U Expired JPH0448371Y2 (en) | 1987-12-09 | 1987-12-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448371Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4502471B2 (en) * | 2000-07-12 | 2010-07-14 | 三菱電線工業株式会社 | Rotating shaft seal |
-
1987
- 1987-12-09 JP JP1987186439U patent/JPH0448371Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0191164U (en) | 1989-06-15 |
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