JPS61128457U - - Google Patents
Info
- Publication number
- JPS61128457U JPS61128457U JP1130785U JP1130785U JPS61128457U JP S61128457 U JPS61128457 U JP S61128457U JP 1130785 U JP1130785 U JP 1130785U JP 1130785 U JP1130785 U JP 1130785U JP S61128457 U JPS61128457 U JP S61128457U
- Authority
- JP
- Japan
- Prior art keywords
- casing
- rotating shaft
- ensured
- fitting hole
- predetermined value
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
Landscapes
- Sealing Devices (AREA)
Description
第１図は従来の分配型燃料噴射ポンプの概略を
示す断面図、第２図は第１図のポンプに使用され
ている回転軸のシール構造の拡大断面図、第３図
は本考案の一実施例を示す回転軸のシール構造の
断面図、第４図は同要部の拡大断面図である。
１……燃料噴射ポンプ（機器）、２……ポンプ
ハウジング（ケーシング）、３……嵌合孔、４…
…回転軸、９……Ｏリング（第１のシールリング
）、１０……Ｏリング（第２のシールリング）。
Fig. 1 is a cross-sectional view schematically showing a conventional distribution type fuel injection pump, Fig. 2 is an enlarged sectional view of the rotary shaft seal structure used in the pump of Fig. 1, and Fig. 3 is an example of the present invention. FIG. 4 is a cross-sectional view of a rotary shaft seal structure showing an embodiment, and FIG. 4 is an enlarged cross-sectional view of the main part. 1... Fuel injection pump (equipment), 2... Pump housing (casing), 3... Fitting hole, 4...
... Rotating shaft, 9 ... O ring (first seal ring), 10 ... O ring (second seal ring).
Claims (1)
嵌合された回転軸の外周にその軸線方向に間隔を
存して互いに弾性係数の異なる２個の弾性シール
リングを設けてなり、前記ケーシング内の圧力が
所定値以下の時は前記回転軸の外端側に位置する
第１のシールリングによりシール機能が確保され
、また前記ケーシング内の圧力が所定値以上の時
は前記回転軸の内端側に位置する第２のシールリ
ングによりシール機能が確保されるように構成し
た回転軸のシール構造。 Two elastic seal rings having different elastic modulus are provided at an interval in the axial direction on the outer periphery of a rotating shaft rotatably fitted into a fitting hole provided in a fitting hole provided in a casing of the device. When the pressure inside the casing is below a predetermined value, the sealing function is ensured by the first seal ring located on the outer end side of the rotating shaft, and when the pressure inside the casing is above a predetermined value, the inner end of the rotating shaft A rotary shaft seal structure configured such that a sealing function is ensured by a second seal ring located on the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130785U JPS61128457U (en) | 1985-01-31 | 1985-01-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130785U JPS61128457U (en) | 1985-01-31 | 1985-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61128457U true JPS61128457U (en) | 1986-08-12 |
Family
ID=30493307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1130785U Pending JPS61128457U (en) | 1985-01-31 | 1985-01-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61128457U (en) |
-
1985
- 1985-01-31 JP JP1130785U patent/JPS61128457U/ja active Pending
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