JPH042238Y2 - - Google Patents
Info
- Publication number
- JPH042238Y2 JPH042238Y2 JP14844786U JP14844786U JPH042238Y2 JP H042238 Y2 JPH042238 Y2 JP H042238Y2 JP 14844786 U JP14844786 U JP 14844786U JP 14844786 U JP14844786 U JP 14844786U JP H042238 Y2 JPH042238 Y2 JP H042238Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pressure chamber
- sealing device
- lubricant
- chamber
- 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 27
- 239000000314 lubricant Substances 0.000 claims description 21
- 238000009412 basement excavation Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、高圧力下の地中を掘削するトンネ
ル掘進機等のシール装置に関し、特に、カツター
回転体と掘進機本体側のケーシング間におけるシ
ール装置に係るものである。[Detailed description of the invention] (Industrial field of application) This invention relates to a sealing device for a tunnel excavating machine etc. that excavates underground under high pressure. This relates to a sealing device.
（従来の技術）
この種の掘進機において、カツター回転体と掘
進機本体側のケーシング間における相対回転域間
のシール装置として、その相対回転域間の長手方
向に間隔を設けて複数のシール装置を配備し、各
シール装置間に形成される圧力室にそれぞれ外圧
に略等しい圧力を供給してシールすることが従来
より一般に行われていた。(Prior Art) In this type of excavator, a plurality of sealing devices are provided at intervals in the longitudinal direction between the relative rotation regions between the cutter rotating body and the casing on the main body side of the excavator, as a seal device between the relative rotation regions. Conventionally, it has been common practice to provide a pressure chamber formed between each sealing device with a pressure substantially equal to the external pressure to achieve sealing.
しかし、この方法では、背面側（低圧側）圧力
室と大気圧に近いその外部との圧力差が極めて大
きくなり、背面側のシール装置に多大な圧力が作
用するので、背面側シール装置の寿命が短く、ま
た、背面側シール装置の許容圧力によつてシール
装置全体のシール可能な圧力が決まるため、耐圧
性能が低かつた。 However, with this method, the pressure difference between the back side (low pressure side) pressure chamber and the outside, which is close to atmospheric pressure, becomes extremely large, and a large amount of pressure acts on the back side sealing device. In addition, the sealable pressure of the entire sealing device was determined by the allowable pressure of the rear side sealing device, so the pressure resistance was low.
そこで、最近、カツター回転体と掘進機本体と
の相対回転域間の長手方向に間隔を設けて複数の
シール装置を配備し、各シール装置間に形成され
る圧力室にそれぞれ順次差圧を設けて圧力を供給
し、シール装置全体の耐圧性能を向上すると共
に、背面側シール装置の寿命を延長できるシール
装置が提案（特開昭60−148996号）されている。 Therefore, recently, a plurality of sealing devices have been installed at intervals in the longitudinal direction between the relative rotation region of the cutter rotating body and the main body of the excavator, and differential pressure is sequentially created in the pressure chambers formed between each sealing device. A sealing device has been proposed (Japanese Unexamined Patent Publication No. 148996/1983) which can supply pressure to improve the pressure resistance of the entire sealing device and extend the life of the back side sealing device.
（考案が解決しようとする問題点）
上記先行のシール装置にあつては、各圧力室の
設定圧が予め決められているので、掘削作業中に
圧力変動があると、圧力室内に地山の泥水が浸入
したり或いは圧力室内の加圧潤滑剤が外部へ漏出
してシール装置を破損させる虞れがある。また、
各圧力室に供給される加圧潤滑剤は循環されず、
圧力室内に滞留されているので、潤滑剤による放
熱効果が少なく、しかも、潤滑剤が汚れて回転摺
動面の摺動抵抗を大きくさせるという欠点があ
る。(Problem to be solved by the invention) In the above-mentioned preceding sealing device, the set pressure of each pressure chamber is predetermined, so if there is a pressure fluctuation during excavation work, the rock formations may occur in the pressure chamber. There is a risk that muddy water will enter or the pressurized lubricant in the pressure chamber will leak to the outside, damaging the sealing device. Also,
The pressurized lubricant supplied to each pressure chamber is not circulated,
Since the lubricant is retained in the pressure chamber, the heat dissipation effect of the lubricant is small, and furthermore, the lubricant becomes dirty and increases the sliding resistance of the rotating sliding surface.
この考案は上述の点に鑑みなされたもので、カ
ツター回転体と掘進機本体との相対回転域間の各
シール装置間に形成される各圧力室に供給される
加圧潤滑剤が常に循環され、放熱効果と回転摺動
能力が高く、しかも、掘削箇所の圧力変動に即応
して各圧力室の設定圧が変更される掘進機のシー
ル装置を提供しようとするものである。 This idea was made in view of the above points, and the pressurized lubricant supplied to each pressure chamber formed between each seal device between the relative rotation area of the cutter rotating body and the excavator body is constantly circulated. An object of the present invention is to provide a sealing device for an excavator which has a high heat dissipation effect and rotational sliding ability, and which can change the set pressure of each pressure chamber in response to pressure fluctuations at an excavated location.
（問題点を解決するための手段）
上記目的を達成するためのこの考案の要旨とす
るところは、掘進機本体内に回動自在に配装され
たカツター回転体との環状相対回転域間にその長
手方向に間隔を設けて配備した複数の環状シール
装置間に形成される複数の圧力室に、潤滑剤供給
タンクから加圧ポンプにより加圧して加圧潤滑剤
を供給すると共に、各圧力室と供給タンクとを接
続する出口側管路に圧力制御弁を介装して潤滑剤
循環系路を構成し、高圧側シール装置の外部に圧
力検出器を設け、該圧力検出器により検出した圧
力値に基づいて該圧力値若しくはこれよりやや高
い圧力値を最高圧として高圧側圧力室より前記圧
力室数に応じて順次減圧し各隣接圧力室に差圧が
生じるように各圧力室の圧力値を設定する圧力設
定機構を、前記各圧力制御弁に接続したことであ
る。(Means for Solving the Problems) The gist of this invention to achieve the above purpose is to Pressurized lubricant is supplied from a lubricant supply tank to a plurality of pressure chambers formed between a plurality of annular seal devices arranged at intervals in the longitudinal direction by a pressure pump, and each pressure chamber A pressure control valve is interposed in the outlet side pipe connecting the and supply tank to form a lubricant circulation system, and a pressure detector is provided outside the high pressure side sealing device, and the pressure detected by the pressure detector is Based on the value, the pressure value of each pressure chamber is determined so that the pressure value or a pressure value slightly higher than this value is set as the maximum pressure, and the pressure is sequentially reduced from the high pressure side pressure chamber according to the number of pressure chambers, and a pressure difference is generated in each adjacent pressure chamber. A pressure setting mechanism for setting the pressure is connected to each of the pressure control valves.
（作用）
この考案のシール装置によれば、高圧（カツタ
ーヘツド）側外圧に応じて各圧力室の出口側の圧
力制御弁が制御され、各圧力室内の潤滑剤の圧力
が順次差圧を設けて設定されると共に、各圧力室
に供給される潤滑剤は常に循環される。(Function) According to the sealing device of this invention, the pressure control valve on the outlet side of each pressure chamber is controlled according to the external pressure on the high pressure (cutter head) side, and the pressure of the lubricant in each pressure chamber is sequentially adjusted to create a differential pressure. The lubricant supplied to each pressure chamber is constantly circulated.
（実施例）
以下、この考案の実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of this invention will be described based on the drawings.
第１図はトンネル掘進機前部の概要断面図、第
２図はシール装置の潤滑剤循環系統図である。第
１図において、１はトンネル掘進機本体で、前端
にカツターヘツド２ａを有するカツター回転体２
が掘進機本体１内に回動自在に配装されている。
３はカツター回転体２の駆動装置、４は推進ジヤ
ツキ、５は加圧泥水の給排管である。第２図にお
いて、６は掘進機本体１とカツター回転体２間の
環状相対回転域で、この相対回転域６内にその長
手方向に間隔を設けて複数（Ｎ個）の環状シール
装置７が、掘進機本体１側に固着され配備されて
いる。そして、各シール装置７間は圧力室８に形
成され、Ｎ−１個の圧力室８からなつている。 FIG. 1 is a schematic sectional view of the front part of the tunnel excavator, and FIG. 2 is a diagram of the lubricant circulation system of the sealing device. In Fig. 1, reference numeral 1 denotes the main body of a tunnel boring machine, and a cutter rotating body 2 having a cutter head 2a at the front end.
is rotatably arranged inside the excavator main body 1.
3 is a drive device for the cutter rotating body 2, 4 is a propulsion jack, and 5 is a pressurized mud water supply and discharge pipe. In FIG. 2, reference numeral 6 denotes an annular relative rotation area between the excavator main body 1 and the cutter rotating body 2, and within this relative rotation area 6, a plurality (N) of annular seal devices 7 are provided at intervals in the longitudinal direction. , is fixed and provided on the side of the excavator main body 1. A pressure chamber 8 is formed between each sealing device 7, and consists of N-1 pressure chambers 8.
符号pdは高圧（カツターヘツド２ａ）側圧力、
pnは低圧（背面）側圧力を示す。 The code pd is the high pressure (cutter head 2a) side pressure,
pn indicates the low pressure (back) side pressure.
９は潤滑剤としてのグリスの供給タンクで、こ
の供給タンク９から加圧ポンプ１０を介して各圧
力室８へ加圧グリスの供給管１１が導かれてい
る。各圧力室８へ至る各供給管１１には、切換弁
１２がそれぞれ介装されている。また、加圧ポン
プ１０の吐出側には、供給タンク９への戻し管１
３が接続され、この戻し管１３にはリリーフ弁１
４が介装されている。 Reference numeral 9 denotes a supply tank for grease as a lubricant, and a pressure grease supply pipe 11 is led from this supply tank 9 to each pressure chamber 8 via a pressure pump 10. Each supply pipe 11 leading to each pressure chamber 8 is provided with a switching valve 12, respectively. Further, on the discharge side of the pressurizing pump 10, there is a return pipe 1 to the supply tank 9.
3 is connected to the return pipe 13, and a relief valve 1 is connected to the return pipe 13.
4 is interposed.
１５は各圧力室８と供給タンク９を接続する戻
り管で、各戻り管１５には遠隔操作により設定圧
が制御される圧力制御弁１６がそれぞれ介装さ
れ、また、戻り管１５の供給タンク９側にはフイ
ルター１７が介装されている。 15 is a return pipe connecting each pressure chamber 8 and the supply tank 9; each return pipe 15 is provided with a pressure control valve 16 whose set pressure is controlled by remote control; A filter 17 is interposed on the 9 side.
１８は圧力検出器で、この圧力検出器１８はシ
ール装置７外方の高圧側に配備されており、検出
された圧力値が電気信号に変換されて圧力設定機
構１９へ送られるように、圧力設定機構１９に接
続されている。また、この圧力設定機構１９は前
記各圧力制御弁１６に接続されており、圧力検出
器１８から送られてきた圧力値に基づいて、高圧
側圧力室８が圧力値pdと同一値若しくは圧力値
pdよりやや高く（pd＋背面側抵抗圧δp）設定し、
例えば、この最大設定値を圧力室数Ｎ−１で割つ
た値を差圧として順次、最大設定値より減じた圧
力値p2〜po-1を次の高圧側圧力室８2より低圧側
圧力室８o-1にかけて設定し、各圧力制御弁１６
に各圧力室８1〜o-1が設定圧になるように電気信
号で指令する。 Reference numeral 18 denotes a pressure detector, and this pressure detector 18 is installed on the high pressure side outside the sealing device 7. It is connected to the setting mechanism 19. Moreover, this pressure setting mechanism 19 is connected to each pressure control valve 16, and based on the pressure value sent from the pressure detector 18, the high pressure side pressure chamber 8 is set to the same value as the pressure value PD or the pressure value
Set slightly higher than PD (PD + back side resistance pressure δp),
For example, the value obtained by dividing this maximum setting value by the number of pressure chambers N-1 is used as the differential pressure, and the pressure values p 2 to p o-1, which are sequentially subtracted from the maximum setting value, are set to the lower pressure side than the next high pressure side pressure chamber 8 2 . Pressure chamber 8 o-1 is set, and each pressure control valve 16
An electric signal is used to command each pressure chamber 81 to o-1 to reach the set pressure.
このようにして、各圧力室８の圧力値が高圧側
外部圧力に対応して逐次設定される。 In this way, the pressure value of each pressure chamber 8 is sequentially set corresponding to the high-pressure side external pressure.
次に、上記実施例のシール装置の作動態様を説
明する。第２図において、加圧ポンプ１０を作動
すると共に、各切換弁１２をONにして、各圧力
室８へのグリス供給圧力が最大設定値より高くな
るように加圧しながら、各圧力室８1〜o-1へ加圧
したグリスを供給する。各圧力室８1〜o-1へ供給
された加圧グリスの一部は、出口側の制御弁１６
を介して供給タンク９へ戻され、圧力室８はそれ
ぞれ圧力設定機構１９により設定された圧力値に
維持される。一方、出口側の制御弁１６を介して
供給タンク９へ戻されるグリスは、フイルター１
７を通つて清浄化される。 Next, the operation mode of the sealing device of the above embodiment will be explained. In FIG. 2, while operating the pressure pump 10, each switching valve 12 is turned on, and each pressure chamber 8 is pressurized so that the grease supply pressure to each pressure chamber 8 is higher than the maximum setting value. Supply pressurized grease to ~o-1 . A part of the pressurized grease supplied to each pressure chamber 8 1 to o-1 is transferred to the control valve 16 on the outlet side.
The pressure chambers 8 are each maintained at a pressure value set by a pressure setting mechanism 19. On the other hand, the grease returned to the supply tank 9 via the control valve 16 on the outlet side passes through the filter 1
7 to be cleaned.
（効果）
以上説明したように、この考案のシール装置は
上記した構成からなるから、下記の如き効果を奏
する。(Effects) As explained above, since the sealing device of this invention has the above-described configuration, it has the following effects.
(1) 高圧（カツターヘツド）側外圧に応じて各圧
力室の出口側の圧力制御弁が制御され、各圧力
室内の潤滑剤の圧力が順次差圧を設けて設定さ
れるので、シール機能が確実に保証される。(1) The pressure control valve on the outlet side of each pressure chamber is controlled according to the external pressure on the high pressure (cutter head) side, and the pressure of the lubricant in each pressure chamber is set sequentially with a differential pressure, so the sealing function is ensured. guaranteed.
(2) 各圧力室に供給される潤滑剤は常に循環され
ているので、放熱効果が高く、しかも、潤滑剤
が常時、清浄化されて、回転摺動面の摺動抵抗
が変化せず、安定している。(2) Since the lubricant supplied to each pressure chamber is constantly circulated, the heat dissipation effect is high, and the lubricant is constantly cleaned, so the sliding resistance of the rotating sliding surface does not change. stable.
第１図はトンネル掘進機前部の概要断面図、第
２図はこの考案の実施例を示すシール装置の潤滑
剤循環系統図である。
１……トンネル掘進機本体、２……カツター回
転体、６……相対回転域、７……シール装置、８
……圧力室、９……潤滑剤供給タンク、１０……
加圧ポンプ、１６……圧力制御弁、１８……圧力
検出器、１９……圧力設定機構。
FIG. 1 is a schematic sectional view of the front part of a tunnel excavating machine, and FIG. 2 is a diagram of a lubricant circulation system of a sealing device showing an embodiment of this invention. DESCRIPTION OF SYMBOLS 1...Tunnel excavation machine main body, 2...Cutter rotating body, 6...Relative rotation range, 7...Seal device, 8
...Pressure chamber, 9...Lubricant supply tank, 10...
Pressure pump, 16...pressure control valve, 18...pressure detector, 19...pressure setting mechanism.
Claims (1)
回転体との環状相対回転域間に、複数の環状シー
ル装置を長手方向に間隔を設けて配備した掘進機
において、 前記各シール装置間に形成される複数の圧力室
に、潤滑剤供給タンクから加圧ポンプにより加圧
して加圧潤滑剤を供給すると共に、各圧力室と供
給タンクとを接続する出口側管路に圧力制御弁を
介装して潤滑剤循環系路を構成し、高圧側シール
装置の外部に圧力検出器を設け、該圧力検出器に
より検出した圧力値に基づいて該圧力値若しくは
これよりやや高い圧力値を最高圧として高圧側圧
力室より前記圧力室数に応じて順次減圧し各隣接
圧力室に差圧が生じるように各圧力室の圧力値を
設定する圧力設定機構を、前記各圧力制御弁に接
続したことを特徴とする掘進機におけるシール装
置。[Scope of Claim for Utility Model Registration] An excavation machine in which a plurality of annular seal devices are arranged at intervals in the longitudinal direction between an annular relative rotation area with a cutter rotating body rotatably arranged in the excavation machine main body. In this step, pressurized lubricant is supplied from a lubricant supply tank to the plurality of pressure chambers formed between the seal devices by pressurization by a pressure pump, and an outlet side connecting each pressure chamber and the supply tank is supplied. A pressure control valve is interposed in the pipeline to constitute a lubricant circulation system, and a pressure detector is provided outside the high-pressure side sealing device, and based on the pressure value detected by the pressure detector, the pressure value or this The pressure setting mechanism sets the pressure value of each pressure chamber so that the pressure is set at a slightly higher pressure value as the maximum pressure, and the pressure is sequentially reduced from the high pressure side pressure chamber according to the number of pressure chambers, and a pressure difference is generated in each adjacent pressure chamber. A sealing device for an excavator, characterized in that it is connected to each pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14844786U JPH042238Y2 (en) | 1986-09-27 | 1986-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14844786U JPH042238Y2 (en) | 1986-09-27 | 1986-09-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6356793U JPS6356793U (en) | 1988-04-15 |
| JPH042238Y2 true JPH042238Y2 (en) | 1992-01-24 |
Family
ID=31062724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14844786U Expired JPH042238Y2 (en) | 1986-09-27 | 1986-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042238Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0765472B2 (en) * | 1989-01-17 | 1995-07-19 | 日立建機株式会社 | Cutter seal device for shield machine |
| JP7102328B2 (en) * | 2018-12-11 | 2022-07-19 | 地中空間開発株式会社 | Shield digger |
| JP2020094348A (en) * | 2018-12-11 | 2020-06-18 | 川崎重工業株式会社 | Shield machine |
-
1986
- 1986-09-27 JP JP14844786U patent/JPH042238Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6356793U (en) | 1988-04-15 |
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