JPH0430192U - - Google Patents
Info
- Publication number
- JPH0430192U JPH0430192U JP6947690U JP6947690U JPH0430192U JP H0430192 U JPH0430192 U JP H0430192U JP 6947690 U JP6947690 U JP 6947690U JP 6947690 U JP6947690 U JP 6947690U JP H0430192 U JPH0430192 U JP H0430192U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- labyrinth seal
- seal member
- sealing device
- fresh water
- 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.)
- Granted
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
第１図は、本考案による実施例のシール装置が
適用された掘削機の前側一部の概略側面断面図、
第２図は実施例のシール装置における配管レイア
ウト図、第３図はラビリンスシール構造部を交換
可能とした他の実施例の側面断面図を示す。
符号の説明、１０……機体ケーシング、１１…
…回転カツター、２０〜２２……シール部材、２
０ａ〜２２ａ……リツプ部、２３……ラビリンス
シール部材、２３ｂ……微小すき間、３０……ラ
ビリンスシール構造部、３１〜３４……第１〜第
４圧力室、４１〜……清水注入管、４２，４３…
…加圧グリス（潤滑剤）の供給管、５１，５２…
…ラビリンス構造体、５３，５４……押え部材。
FIG. 1 is a schematic side sectional view of a part of the front side of an excavator to which a sealing device according to an embodiment of the present invention is applied;
FIG. 2 is a piping layout diagram of the sealing device of the embodiment, and FIG. 3 is a side sectional view of another embodiment in which the labyrinth seal structure is replaceable. Explanation of symbols, 10... Airframe casing, 11...
... Rotating cutter, 20-22 ... Seal member, 2
0a to 22a... lip portion, 23... labyrinth seal member, 23b... minute gap, 30... labyrinth seal structure part, 31 to 34... first to fourth pressure chambers, 41 to... fresh water injection pipe, 42, 43...
...Pressure grease (lubricant) supply pipe, 51, 52...
...Labyrinth structure, 53, 54...pressing member.
Claims (1)
の間に介装され、掘削面に臨む前方高圧側から後
方低圧側へ複数のシール部材が配列されかつ各シ
ール部材間に設けられた圧力室にシール用の潤滑
剤が加圧供給されるシール装置において、 複数のシール部材の第１段目の前方にラビリン
スシール構造部を設け、このラビリンスシール構
造部に泥水圧よりも高圧の清水を注入して、泥水
の機体ケーシングへの侵入を防止してなるシール
装置。 (2) ラビリンスシール構造部が、環状に形成さ
れた複数のラビリンスシール部材を軸方向に並列
に配置して構成される請求項(1)記載のシール装
置。 (3) ラビリンスシール構造部に設けられた清水
注入口と第１段目のシール部材との間にラビリン
スシール部材の１つを介装して、清水の第１段シ
ール部材への侵入を阻止し、かつ、第１段シール
部材にて潤滑剤による背圧が所定圧より低下した
ときに、ラビリンスシール部材が受圧して内径リ
ツプ部が回転カツターの外周面に接触して清水の
逆流を阻止する請求項(1)記載のシール装置。[Scope of Claim for Utility Model Registration] (1) A plurality of seal members are interposed between the machine casing and the outer peripheral surface of the rotary cutter, and each seal member is arranged from the front high-pressure side facing the excavation surface to the rear low-pressure side, and each seal member In a sealing device in which lubricant for sealing is supplied under pressure to a pressure chamber provided in between, a labyrinth seal structure is provided in front of the first stage of a plurality of seal members, and mud water pressure is applied to this labyrinth seal structure. A sealing device that prevents muddy water from entering the fuselage casing by injecting fresh water at a higher pressure. (2) The sealing device according to claim (1), wherein the labyrinth seal structure is configured by arranging a plurality of annular labyrinth seal members in parallel in the axial direction. (3) One of the labyrinth seal members is interposed between the fresh water inlet provided in the labyrinth seal structure and the first stage seal member to prevent fresh water from entering the first stage seal member. In addition, when the back pressure caused by the lubricant in the first stage seal member drops below a predetermined pressure, the labyrinth seal member receives the pressure and the inner diameter lip comes into contact with the outer peripheral surface of the rotary cutter to prevent backflow of fresh water. The sealing device according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6947690U JP2517476Y2 (en) | 1990-06-29 | 1990-06-29 | Excavator sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6947690U JP2517476Y2 (en) | 1990-06-29 | 1990-06-29 | Excavator sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0430192U true JPH0430192U (en) | 1992-03-11 |
| JP2517476Y2 JP2517476Y2 (en) | 1996-11-20 |
Family
ID=31604811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6947690U Expired - Lifetime JP2517476Y2 (en) | 1990-06-29 | 1990-06-29 | Excavator sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2517476Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013170679A (en) * | 2012-02-23 | 2013-09-02 | General Electric Co <Ge> | Seal body, device, and method |
| JP2016176211A (en) * | 2015-03-19 | 2016-10-06 | 三菱重工メカトロシステムズ株式会社 | Shield excavator |
| CN117128317A (en) * | 2023-08-14 | 2023-11-28 | 中铁山河工程装备股份有限公司 | A kind of pressure relief sealing system for shaft boring machine |
-
1990
- 1990-06-29 JP JP6947690U patent/JP2517476Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013170679A (en) * | 2012-02-23 | 2013-09-02 | General Electric Co <Ge> | Seal body, device, and method |
| JP2016176211A (en) * | 2015-03-19 | 2016-10-06 | 三菱重工メカトロシステムズ株式会社 | Shield excavator |
| CN117128317A (en) * | 2023-08-14 | 2023-11-28 | 中铁山河工程装备股份有限公司 | A kind of pressure relief sealing system for shaft boring machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2517476Y2 (en) | 1996-11-20 |
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