JPH0352878Y2 - - Google Patents
Info
- Publication number
- JPH0352878Y2 JPH0352878Y2 JP1984140442U JP14044284U JPH0352878Y2 JP H0352878 Y2 JPH0352878 Y2 JP H0352878Y2 JP 1984140442 U JP1984140442 U JP 1984140442U JP 14044284 U JP14044284 U JP 14044284U JP H0352878 Y2 JPH0352878 Y2 JP H0352878Y2
- Authority
- JP
- Japan
- Prior art keywords
- lip
- seal
- excavator
- pressure
- flexible material
- 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 18
- 239000000463 material Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000011888 foil Substances 0.000 description 7
- 239000004519 grease Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- 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、高水圧下で地盤を掘削するシールド
掘進機、横孔掘進機、立孔掘削機などの回転掘削
機のシール装置に関し、特に大口径の回転掘削機
におけるシール装置に関するものである。[Detailed description of the invention] [Field of industrial application] The present invention relates to a seal device for rotary excavators such as shield excavators, horizontal hole excavators, vertical hole excavators, etc. that excavate the ground under high water pressure, and is particularly applicable to This invention relates to a sealing device for a large-diameter rotary excavator.
大口径回転掘削機の内のシールド掘進機を第４
図を参照して説明する。このシールド掘進機は、
シールド本体２の前面開口部にカツターホイル１
を軸受１０を介して回転可能に支持し、そのシー
ルド本体２の隔壁４に駆動モータ１２を固定し、
一方カツターホイル１に旋回輪１９を設け、その
旋回輪１９に駆動モータ１２の回転軸に固定した
ピニオン１１を噛合させる。また、相互に対向す
るシールド本体２の大径円筒部２ａの内周面とカ
ツターホイル１の大径円筒部１ａの外周面との
間、およびシールド本体２の小径円筒部２ｂとの
外周面とカツターホイル１の小径円筒部１ｂの内
周面との間にカツターシール３を介装する。この
カツターシール３は、リツプ長の長い多重リツプ
形のシールである。前記駆動モータ１２を駆動さ
せ、カツターホイル１を回転させて地山を掘削す
る。
The fourth shield excavator among the large-diameter rotary excavators
This will be explained with reference to the figures. This shield excavator is
Attach the cutter foil 1 to the front opening of the shield body 2.
is rotatably supported via a bearing 10, and a drive motor 12 is fixed to the bulkhead 4 of the shield body 2,
On the other hand, the cutter wheel 1 is provided with a turning ring 19, and a pinion 11 fixed to the rotating shaft of the drive motor 12 is meshed with the turning ring 19. Also, between the inner circumferential surface of the large diameter cylindrical portion 2a of the shield body 2 and the outer circumferential surface of the large diameter cylindrical portion 1a of the cutter foil 1, which face each other, and between the outer circumferential surface of the small diameter cylindrical portion 2b of the shield body 2 and the cutter foil. A cutter seal 3 is interposed between the inner circumferential surface of the small diameter cylindrical portion 1b. This cutter seal 3 is a multi-lip type seal with a long lip length. The drive motor 12 is driven and the cutter wheel 1 is rotated to excavate the ground.
なお、図中Ａはシールド本体２内で大気圧とな
つている。Ｂは切羽を示し、高水圧、高土圧下に
ある。Ｃはピニオン１１などを含むピニオン室、
Ｄは軸受１０などを含む軸受室を示す。また、５
は機内Ａとピニオン室Ｃおよび軸受室Ｄとを気密
的に密封隔離している隔壁である。 Note that A in the figure indicates atmospheric pressure within the shield body 2. B indicates the face, which is under high water pressure and high earth pressure. C is a pinion chamber containing pinion 11, etc.;
D indicates a bearing chamber containing the bearing 10 and the like. Also, 5
is a partition wall that hermetically isolates the machine interior A from the pinion chamber C and the bearing chamber D.
かかる大口径の回転掘削機における従来のシー
ル装置は、第３図に示すように、シールド本体
２，２ａ，２ｂとカツターホイル１，１ａ，１ｂ
との間に多重リツプ形シール３を複数個、例えば
３個介装する。この３個の多重リツプ形シール３
は、カツタホイル１に固定した固定部３ａと、シ
ールド本体２に圧接した３条のリツプ部３ｂとか
らなり、このリツプ部３ｂの間にはグリース（図
示せず）が充填されており、掘削土砂がシールド
本体２内に侵入するのを防ぐものである。かかる
従来のシール装置は下記の利点を有する。 A conventional sealing device for such a large-diameter rotary excavator, as shown in FIG.
A plurality of multiple lip type seals 3, for example, three, are interposed between the two. These three multiple lip type seals 3
consists of a fixed part 3a fixed to the cutter foil 1 and three lip parts 3b pressed against the shield main body 2. Grease (not shown) is filled between the lip parts 3b, and excavated earth and sand are filled with grease (not shown). This prevents the particles from entering the shield body 2. Such a conventional sealing device has the following advantages.
(1) リツプ長が長いと、大口径構造物の水圧によ
る弾性変形に対してよく追随でき、密封性が安
定している。シールのたわみ量が変化しても、
シールリツプ接触面圧の変化が少なく、シール
性が変わらない。(1) If the lip length is long, it can better follow the elastic deformation caused by water pressure of large-diameter structures, and the sealing performance is stable. Even if the amount of deflection of the seal changes,
There is little change in seal lip contact pressure, and sealing performance remains unchanged.
(2) ベアリングが摩擦してシールド本体とカツタ
ホイルの偏心によく追随でき、シール性が安定
している。(2) The bearing is able to frictionally follow the eccentricity of the shield body and cutter foil, resulting in stable sealing performance.
(3) シール高さが大きいと、カツタホイルとシー
ルド本体の相対向する円筒部の間隙が大きいの
で、大口径重量構造物の嵌合組立時の芯出作業
が容易である。(3) When the seal height is large, the gap between the opposing cylindrical portions of the cutter foil and the shield body is large, which facilitates centering work when fitting and assembling large-diameter heavy structures.
(4) 大口径構造物では、シール摺動面の表面硬化
処理（焼入、クロムメツキなど）が技術的に困
難であるので、表面硬度が低く、そのため泥水
によつて摩耗し易いが、多重リツプによつて、
土砂の侵入を各段階に分けて阻止し易い。(4) In large-diameter structures, surface hardening treatment (quenching, chrome plating, etc.) of the seal sliding surface is technically difficult, so the surface hardness is low and therefore easily abraded by muddy water. According to
It is easy to prevent the invasion of earth and sand by dividing it into each stage.
しかしながら、従来のシール装置においては、
リツプ部３ｂの間にグリースが充填されるだけ
で、各リツプ部３ｂはほとんど単独で水圧を支持
するように構成されている。したがつて、第３図
に示すように、高水圧Ｐがシールに加わると、１
段目のリツプ部３ｂのグリースが外部へ流出して
１段目のリツプ部３ｂのグリースが外部へ流出し
て１段目のリツプ部３ｂのみが大きく撓み、その
１段目のリツプ部３ｂとシールド本体２との摺動
面間に高い接触面圧が発生し、シール寿命を短か
くすると言う問題点がある。
However, in conventional sealing devices,
Each lip portion 3b is configured to almost independently support water pressure by simply filling the gap between the lip portions 3b with grease. Therefore, as shown in Figure 3, when high water pressure P is applied to the seal, 1
The grease in the lip part 3b of the first stage flows out, and the grease in the lip part 3b of the first stage flows out. There is a problem in that high contact pressure is generated between the sliding surfaces with the shield body 2, shortening the seal life.
本考案は、上記の問題点を解決したシール装置
を提供せんとするものである。 The present invention aims to provide a sealing device that solves the above problems.
本考案は、上記の課題を解決するため、多重リ
ツプ形シールのリツプ部の間に剛性が多重リツプ
形シールより低い可撓性材料を挿入する。
In order to solve the above-mentioned problems, the present invention inserts a flexible material between the lip portions of the multi-rip seal, the stiffness of which is lower than that of the multi-rip seal.
本考案は、多重ロツプ形シールのリツプ部の間
に剛性が多重リツプ形シールより低い可撓性材料
を挿入したので、その可撓性材料により、水圧や
土圧を各リツプ部に分担させて伝えることができ
る。この結果、リツプ部１条当りの撓み量を小さ
くすることができ、従つて、シールリツプ部の接
触面圧を小さく保つてシール寿命を長くすること
ができ、しかも多重リツプ形シールの持つ弾性特
性を損なうことがない。
In the present invention, a flexible material whose rigidity is lower than that of the multiple lip seal is inserted between the lip parts of the multiple lip seal, so that the flexible material allows water pressure and earth pressure to be shared between each lip part. I can tell you. As a result, the amount of deflection per lip can be reduced, and the contact pressure of the seal lip can be kept low, extending the seal life.Moreover, the elastic properties of the multi-lip seal can be improved. It will not be damaged.
〔実施例〕
以下、本考案に係るシール装置の一実施例を第
１図および第２図を参照して説明する。[Embodiment] Hereinafter, an embodiment of a sealing device according to the present invention will be described with reference to FIGS. 1 and 2.
図中、第３図および第４図と同符号は同一のも
のを示す。 In the figure, the same reference numerals as in FIGS. 3 and 4 indicate the same parts.
しかして、本考案のシール装置は、多重リツプ
形シール３のリツプ部３ｂの間に可撓性材料１３
を挿入する。この可撓性材料１３は、剛性が多重
リツプ形シール３の剛性よりも低く、また大きさ
は相手側摺動面、すなわちシールド本体２に触れ
ない程度で、リツプ部３ｂの間の谷部に適合する
断面形状を有する。たとえば、多重リツプ形シー
ル３は硬質のウレタンゴムが使用されているの
で、可撓性材料１３としては、スポンジまたは孔
明きゴムを用いることが好ましい。かくしてなる
可撓性材料１３を一体のまま、または分割してリ
ツプ部３ｂの間の谷に取付ける。 Therefore, the sealing device of the present invention has a flexible material 13 between the lip portions 3b of the multi-lip seal 3.
Insert. The rigidity of this flexible material 13 is lower than that of the multiple lip seal 3, and the size is such that it does not touch the mating sliding surface, that is, the shield main body 2, and fits into the valley between the lip portions 3b. It has a matching cross-sectional shape. For example, since the multiple lip seal 3 is made of hard urethane rubber, it is preferable to use sponge or perforated rubber as the flexible material 13. The flexible material 13 thus formed is attached to the valley between the lip portions 3b, either as a whole or in pieces.
本考案のシール装置は、以上の如き構成よりな
るから、第２図に示すように、本考案のシール装
置に水圧や土圧Ｐがかかると、リツプ部３ｂの間
に挿入した可撓性材料１３により、水圧や土圧Ｐ
を３条のリツプ部３ｂにそれぞれ分担させて伝え
る。この結果、リツプ部３b1条当りの撓み量が
従来のシール装置に比べて小さくなり、従つてリ
ツプ部３ｂ（特に１段目のリツプ部３ｂ）の接触
面圧が小さく保たれる。ここで、シール摺動面の
摩耗量は（シールリツプ部３ｂの接触面圧）×（摺
動距離）に比例しているので、接触面圧を小さく
して摩耗寿命を伸ばすことができる。また、接触
面圧が大きくなると摩擦発熱も大きくなり、シー
ルの劣化や摩擦損失の増大という欠点を生ずる
が、これらの問題点をも解消できる。しかも、リ
ツプ部３ｂの間の可撓性材料１３は多重リツプ形
シール３よりも剛性が低いので、多重リツプ形シ
ール３の持つ弾性特性を損なうことがない。 Since the sealing device of the present invention has the above configuration, as shown in FIG. 2, when water pressure or earth pressure P is applied to the sealing device of the present invention, the flexible material inserted between the lip portions 3b 13, water pressure and earth pressure P
The information is transmitted to each of the three lip portions 3b. As a result, the amount of deflection per thread of the lip portion 3b is smaller than that of conventional sealing devices, and therefore the contact surface pressure of the lip portion 3b (particularly the first stage lip portion 3b) is kept low. Here, since the amount of wear on the seal sliding surface is proportional to (contact surface pressure of seal lip portion 3b) x (sliding distance), the wear life can be extended by reducing the contact surface pressure. Furthermore, as the contact surface pressure increases, frictional heat generation also increases, resulting in disadvantages such as seal deterioration and increased friction loss, but these problems can also be resolved. Moreover, since the flexible material 13 between the lip portions 3b has lower rigidity than the multiple lip seal 3, the elastic properties of the multiple lip seal 3 are not impaired.
以上述べたように、本考案の大口径回転掘削機
におけるシール装置は、多重リツプ形シールのリ
ツプ部の間に剛性が多重リツプ形シールより低い
可撓性材料を充填したもので、下記の効果を達成
することができる。
As described above, the sealing device for a large-diameter rotary excavator of the present invention is a multi-lip seal in which a flexible material whose rigidity is lower than that of the multi-rip seal is filled between the lip portions of the multi-rip seal, and has the following effects. can be achieved.
(1) 大口径シールの高水圧、高土圧に対する耐圧
性能を高めることができる。(1) The pressure resistance performance of large-diameter seals against high water pressure and high earth pressure can be improved.
(2) 水圧や土圧が高い場合でも、リツプ部の間に
挿入した可撓性材料により、水圧や土圧を各リ
ツプ部に伝えて分担させることができるので、
リツプ部１条当りの撓み量を小さくすることが
できる。したがつて、１段目のシールリツプ部
の接触面圧を小さく保てるので、摺動面および
シールリツプ部の摩耗速度を小さくでき、シー
ル寿命が長くなる。(2) Even when water pressure or earth pressure is high, the flexible material inserted between the lip parts can transmit and share the water pressure and earth pressure to each lip part.
The amount of deflection per lip can be reduced. Therefore, since the contact surface pressure of the first stage seal lip can be kept low, the rate of wear of the sliding surface and the seal lip can be reduced, and the life of the seal can be extended.
第１図は本考案に係る大口径回転掘削機におけ
るシール装置の一実施例を示した断面図、第２図
は使用状態の説明図である。第３図は従来のシー
ル装置を示した使用状態の図である。第４図はシ
ール装置を装備した大口径回転掘削機の内のシー
ルド掘進機を示した断面図である。
１……カツターホイル、２……シールド本体、
３……多重リツプ形シール、３ｂ……リツプ部、
１３……可撓性材料。
FIG. 1 is a sectional view showing an embodiment of a sealing device for a large-diameter rotary excavator according to the present invention, and FIG. 2 is an explanatory view of the sealing device in use. FIG. 3 is a diagram showing a conventional sealing device in use. FIG. 4 is a sectional view showing a shield excavator among the large-diameter rotary excavators equipped with a seal device. 1... cutter foil, 2... shield body,
3...Multiple lip type seal, 3b...Lip part,
13...Flexible material.
Claims (1)
その掘削機本体と回転掘削具との間にリツプ長が
長い多重リツプ形シールを介装し、前記回転掘削
具を回転させて地盤を掘削する大口径回転掘削機
において、前記多重リツプ形シールのリツプ部の
間に、剛性が多重リツプ形シールより低い可撓性
材料を挿入したことを特徴とする大口径回転掘削
機におけるシール装置。 A rotary excavator is rotatably supported on the excavator body,
In a large-diameter rotary excavator that excavates the ground by rotating the rotary excavator, a multi-lip seal with a long lip length is interposed between the excavator main body and the rotary excavator, and the multi-lip seal has a long lip length. A sealing device for a large-diameter rotary excavator, characterized in that a flexible material having lower rigidity than a multi-rip type seal is inserted between the lip portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984140442U JPH0352878Y2 (en) | 1984-09-18 | 1984-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984140442U JPH0352878Y2 (en) | 1984-09-18 | 1984-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6158297U JPS6158297U (en) | 1986-04-19 |
| JPH0352878Y2 true JPH0352878Y2 (en) | 1991-11-18 |
Family
ID=30698791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984140442U Expired JPH0352878Y2 (en) | 1984-09-18 | 1984-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0352878Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5325674B2 (en) * | 2009-06-29 | 2013-10-23 | 株式会社アルプスツール | Sealing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737157B2 (en) * | 1975-10-17 | 1982-08-07 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6128138Y2 (en) * | 1980-08-12 | 1986-08-21 | ||
| JPS5961397U (en) * | 1982-10-15 | 1984-04-21 | 日立造船株式会社 | shield tunneling machine |
-
1984
- 1984-09-18 JP JP1984140442U patent/JPH0352878Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737157B2 (en) * | 1975-10-17 | 1982-08-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6158297U (en) | 1986-04-19 |
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