JPH0638384Y2 - Shaft grounding device - Google Patents
Shaft grounding deviceInfo
- Publication number
- JPH0638384Y2 JPH0638384Y2 JP8688592U JP8688592U JPH0638384Y2 JP H0638384 Y2 JPH0638384 Y2 JP H0638384Y2 JP 8688592 U JP8688592 U JP 8688592U JP 8688592 U JP8688592 U JP 8688592U JP H0638384 Y2 JPH0638384 Y2 JP H0638384Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- contact plate
- grounding device
- silver
- brush
- 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 - Lifetime
Links
Landscapes
- Prevention Of Electric Corrosion (AREA)
- Motor Or Generator Frames (AREA)
- Elimination Of Static Electricity (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、主として舶用主機関
（エンジン）のクランク軸に発生するスパークエロージ
ョンの防止及び船舶の電気防蝕を行うために、回転する
軸（プロペラ軸，クランク軸）を接地する軸接地装置に
関するものである。[Industrial application] This invention mainly grounds rotating shafts (propeller shafts, crankshafts) in order to prevent spark erosion generated on the crankshaft of a marine main engine (engine) and to prevent galvanic corrosion of the ship. The present invention relates to a shaft grounding device.
【０００２】[0002]
【従来の技術】船舶のプロペラを電気防蝕する場合、プ
ロペラ及びプロペラ軸を船体に電気的に接続（接地）す
る必要があるが、運転中のプロペラ軸は軸受潤滑油の油
膜により船体から絶縁状態にあるので、軸に設けたスリ
ップリング等により船体との間に接続回路（接地回路）
を設ける必要がある。この回路は船体全体をアースと考
えているので軸アース装置と呼ばれている。この軸アー
ス装置は近時電気防蝕以外に主機関の軸受部に見られる
スパークエロージョン（放電現象による腐蝕）の防止に
利用されている。2. Description of the Related Art In order to electrically protect a propeller of a ship from corrosion, it is necessary to electrically connect (ground) the propeller and the propeller shaft to the hull, but the propeller shaft during operation is insulated from the hull by an oil film of bearing lubricating oil. Since it is located in, the connection circuit (ground circuit) is connected to the hull by a slip ring etc. installed on the shaft.
Need to be provided. This circuit is called an axial grounding device because it considers the entire hull as grounding. This shaft grounding device is used for preventing spark erosion (corrosion due to a discharge phenomenon) which is recently seen in the bearing portion of the main engine, in addition to electrical corrosion protection.
【０００３】以下、図面を用いて従来の軸接地方法と電
気防蝕方法について説明する。図４は従来の軸アース装
置を用いた電気防蝕方法の説明図である。防蝕電流を供
給する方法として外部電源方式を用いており、船体１の
後尾部分に設置した電極（陽極）２に外部の直流電源３
のプラス端子をつなぎ、電極２から防蝕すべきプロペラ
４及び船体１の金属面に向かって防蝕電流５を流入させ
ている。プロペラ４は中間軸受６によって支持された軸
室７の内部に配設された軸（プロペラ軸）８の一端に接
続され、軸８の他端はエンジン９に接続されている。軸
８の中間部分に軸アース装置１０が設置されており、プ
ロペラ４は軸８及び軸アース装置１０を介して接地（電
気的に船体１に接続）されている。なお、直流電源３の
マイナス端子は船体１に接続されている。前記軸アース
装置１０は、従来から種々の方式，材質が用いられてい
るが、これらは周速の最も大きい軸周部に巻いたスリッ
プリング又は軸身自身にブラシを接触させる方法が一般
的である。スリップリングとブラシの材質についても種
々のものが用いられているが、最も効果的なものは銀系
統によるものである。A conventional shaft grounding method and conventional corrosion protection method will be described below with reference to the drawings. FIG. 4 is an explanatory diagram of a method for galvanic protection using a conventional shaft grounding device. An external power supply system is used as a method of supplying corrosion protection current, and an external DC power supply 3 is connected to an electrode (anode) 2 installed at the tail of the hull 1.
The positive terminal of is connected, and the anticorrosion current 5 is made to flow from the electrode 2 toward the propeller 4 and the metal surface of the hull 1 to be anticorrosion. The propeller 4 is connected to one end of a shaft (propeller shaft) 8 arranged inside a shaft chamber 7 supported by an intermediate bearing 6, and the other end of the shaft 8 is connected to an engine 9. A shaft grounding device 10 is installed in an intermediate portion of the shaft 8, and the propeller 4 is grounded (electrically connected to the hull 1) via the shaft 8 and the shaft grounding device 10. The negative terminal of the DC power supply 3 is connected to the hull 1. Although various methods and materials have been used for the shaft earthing device 10 in the past, a general method is to bring a brush into contact with a slip ring wound around the shaft having the highest peripheral speed or the shaft itself. is there. Various materials are used for slip rings and brushes, but the most effective one is based on silver.
【０００４】[0004]
【考案が解決しようとする課題】前記従来技術による軸
アース装置１０を用いた軸接地方法には以下に述べる問
題がある。 （１）スリップリングに大量の銀を用いるため高価であ
る。 （２）軸室７内に配設された軸８に軸アース装置１０が
取付けられるため、船の振動や、油，湿気の影響を受
け、良好な状態を長期間維持させるのが困難である。 （３）施工の際、ある程度熟練した技術が必要である。 この考案は、これらの問題点を解消する軸接地装置を提
供することを目的とするものである。The shaft grounding method using the shaft grounding device 10 according to the prior art has the following problems. (1) It is expensive because a large amount of silver is used for the slip ring. (2) Since the shaft grounding device 10 is attached to the shaft 8 arranged in the shaft chamber 7, it is difficult to maintain a good condition for a long period of time due to the influence of ship vibration, oil, and humidity. . (3) A somewhat skilled technique is required for construction. It is an object of the present invention to provide a shaft grounding device that solves these problems.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
めに、この考案においては図３の概要説明図に示したよ
うに、プロペラ軸の非駆動側（プロペラ４を取付けた軸
８の反対側）軸端部又はその延長軸端部１１の端面（以
下「軸端面」という）１２に軸接地装置（従来の軸アー
ス装置に相当する部分）１３を設け、この軸接地装置１
３を介して回転する軸８の接地（電気的に船体１に接
続）をとるようにした。In order to achieve the above object, in the present invention, as shown in the schematic explanatory view of FIG. 3, the non-driving side of the propeller shaft (opposite of the shaft 8 to which the propeller 4 is attached is shown. A shaft grounding device (a part corresponding to a conventional shaft grounding device) 13 is provided on an end surface (hereinafter referred to as a “shaft end surface”) 12 of a shaft end portion or an extension shaft end portion 11 thereof, and this shaft grounding device 1
The shaft 8 which rotates via the shaft 3 is grounded (electrically connected to the hull 1).
【０００６】[0006]
【作用】上述したこの考案による軸接地装置によると、
図３に示したエンジン９の右側に見られるように、軸接
地装置１３が軸室７の外部（油や湿気が少ない）の軸端
面１２に設けられているので、前記軸接地装置１３に設
ける銀製の接触板（図１と図２における符号１４）は小
さくてよく、また軸接地装置１３の取付作業が簡単にな
り、しかも、その接触部の環境条件が良くなるので保守
・管理も省力化される。According to the shaft grounding device of the present invention described above,
As seen on the right side of the engine 9 shown in FIG. 3, since the shaft grounding device 13 is provided on the shaft end face 12 outside the shaft chamber 7 (with little oil and moisture), the shaft grounding device 13 is provided on the shaft grounding device 13. The contact plate made of silver (reference numeral 14 in FIGS. 1 and 2) may be small, and the installation work of the shaft grounding device 13 is easy, and the environmental condition of the contact part is good, so maintenance and management are labor-saving. To be done.
【０００７】[0007]
【実施例】以下、この考案の実施例を図面を参照しなが
ら説明する。図１はこの考案に係る軸接地装置の正面
図、図２は図１におけるＡ−Ａ断面図である。Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of a shaft grounding device according to the present invention, and FIG. 2 is a sectional view taken along line AA in FIG.
【０００８】この考案に係る軸接地装置は、大別すると
接触板（銀製）１４を設けた軸側接続部と、エンジンカ
バー１５に取付けられた固定板（銅製）１６と一体に形
成されたブラシホルダ収納ボックス１７とに分けられる 軸接続用パイプ１８は軸端面１２の中心部に取付けら
れ、この軸接続用パイプ１８にはディスク状の接触板支
持座（銅製）１９が蝋付けされており、この部分が軸８
とともに回転する。回転部での接触は、前記ディスク状
の接触板支持座１９の中心部に導電性樹脂（図示せず）
とビス２０とで取付けられた接触板（本実施例では銀
製）１４と、ブラシホルダ２１に取付けられたブラシ
（本実施例では銀合金製）２２によって保たれる。回転
接触部を油や湿気から保護するため、前記ディスク状の
接触板支持部１９の接触板１４を固着してある側は中央
部に窪みをもたせ油や水滴等の拡散を容易にする形状と
し、そのディスク状の外周面とブラシホルダ収納ボック
ス１７に設けられた嵌合部との間隙は前記嵌合部の周辺
部に取付けられたゴム製リング２３によって気密性を保
持する構造にしてある。なお、ブラシ２２は押圧レバー
２５によって接触板１４に押圧されており、ブラシホル
ダ２１はホルダ支持棒２４によってブラシホルダ収納ボ
ックス１７に固定されている。The shaft grounding device according to the present invention is roughly classified into a brush integrally formed with a shaft side connecting portion provided with a contact plate (made of silver) 14 and a fixed plate (made of copper) 16 attached to an engine cover 15. A shaft connection pipe 18 which is divided into a holder storage box 17 is attached to the center of the shaft end face 12, and a disk-shaped contact plate support seat (made of copper) 19 is brazed to the shaft connection pipe 18. This part is axis 8
Rotate with. For the contact at the rotating portion, a conductive resin (not shown) is provided at the center of the disk-shaped contact plate support seat 19.
It is held by a contact plate (made of silver in this embodiment) 14 attached with a screw 20 and a brush (made of silver alloy in this embodiment) 22 attached to a brush holder 21. In order to protect the rotating contact portion from oil and moisture, the side of the disk-shaped contact plate support portion 19 to which the contact plate 14 is fixed has a recess in the center to facilitate diffusion of oil and water droplets. The gap between the disc-shaped outer peripheral surface and the fitting portion provided in the brush holder storage box 17 is structured to maintain airtightness by a rubber ring 23 attached to the peripheral portion of the fitting portion. The brush 22 is pressed against the contact plate 14 by the pressing lever 25, and the brush holder 21 is fixed to the brush holder storage box 17 by the holder support rod 24.
【０００９】プロペラ４に流入した防蝕電流５又は防蝕
していない時に生じる腐蝕電流は軸８を通り、軸接地用
パイプ１８，接触板支持座１９，接触板１４，ブラシ２
２，ブラシホルダ２１，ホルダ支持棒２４，ブラシホル
ダ収納ボックス１７，エンジンカバー１５を経由して船
体１へ流れる。以上の説明において、接触板１４とブラ
シ２２に銀及び銀合金をもちいているが、軸８と船体１
間の電位差が５０ｍＶより多少高くても効果が期待でき
る場合には接触板１４を銅や真鍮に、ブラシ２２はカー
ボンに変更することが可能であり、その場合には低価格
がはかれる。The anticorrosion current 5 flowing into the propeller 4 or the corrosion current generated when the propeller 4 is not anticorrosive passes through the shaft 8 and is connected to the shaft grounding pipe 18, the contact plate support seat 19, the contact plate 14, and the brush 2.
2, it flows to the hull 1 via the brush holder 21, the holder support rod 24, the brush holder storage box 17, and the engine cover 15. Although silver and silver alloys are used for the contact plate 14 and the brush 22 in the above description, the shaft 8 and the hull 1
When the effect can be expected even when the potential difference between the two is slightly higher than 50 mV, the contact plate 14 can be changed to copper or brass, and the brush 22 can be changed to carbon, in which case a low price can be achieved.
【００１０】[0010]
【考案の効果】以上説明したように、この考案による軸
接地装置はプロペラ軸の軸端部に設けられており、この
軸接地装置を介してプロペラ軸の接地をとっているの
で、以下に述べる効果が得られる。 （１）接触板に用いる銀の使用量が従来の１／５〜１／
２０となり、製造費用が大幅に低減できる。 （２）油，湿気等から導電用接触部が保護され、保守，
管理の省力化ができる。 （３）取付作業が簡略化し、熟練した技術は必要としな
い。 （４）軸径に左右されず、同一形状のものが使用できる
ので、大型船から小型船にまで適用できる。 （５）この考案は船のプロペラ軸やクランク軸に限定さ
れることなく、回転軸を接地する場合に広く使用するこ
とができる。As described above, the shaft grounding device according to the present invention is provided at the shaft end portion of the propeller shaft, and grounds the propeller shaft through this shaft grounding device. The effect is obtained. (1) The amount of silver used for the contact plate is 1/5 to 1/1
The manufacturing cost can be significantly reduced by 20. (2) The conductive contact is protected from oil, moisture, etc.
Labor saving of management is possible. (3) Installation work is simplified and no skilled technique is required. (4) Since the same shape can be used regardless of the shaft diameter, it can be applied to large ships and small ships. (5) The present invention is not limited to the propeller shaft or crankshaft of a ship, but can be widely used when the rotating shaft is grounded.
【図１】この考案に係る軸接地装置の正面図。FIG. 1 is a front view of a shaft grounding device according to the present invention.
【図２】図１におけるＡ−Ａ断面図。FIG. 2 is a sectional view taken along line AA in FIG.
【図３】この考案の概要説明図。FIG. 3 is a schematic explanatory view of this device.
【図４】従来の軸アース装置を用いた電気防蝕の説明
図。FIG. 4 is an explanatory view of electrical corrosion protection using a conventional shaft grounding device.
１ 船体 ２ 電極（陽極） ３ 直流電源 ４ プロペラ ５ 防蝕電流 ６ 中間軸受 ７ 軸室 ８ 軸 ９ エンジン １０ 軸アース装置 １１ 軸端部又はその延長軸端部 １２ 軸端面 １３ 軸接地装置 １４ 接触板 １５ エンジンカバー １６ 固定板 １７ ブラシホルダ収納ボックス １８ 軸接続用パイプ １９ 接触板支持座 ２０ ビス ２１ ブラシホルダ ２２ ブラシ ２３ ゴム製リング ２４ ホルダ支持棒 ２５ 押圧レバー 1 Hull 2 Electrode (Anode) 3 DC Power Supply 4 Propeller 5 Corrosion Protection Current 6 Intermediate Bearing 7 Shaft Chamber 8 Shaft 9 Engine 10 Shaft Grounding Device 11 Shaft End or Extension Shaft End 12 Shaft End Face 13 Shaft Grounding Device 14 Contact Plate 15 Engine cover 16 Fixed plate 17 Brush holder storage box 18 Pipe for connecting shaft 19 Contact plate support seat 20 Screw 21 Brush holder 22 Brush 23 Rubber ring 24 Holder support rod 25 Push lever
Claims (1)
ク状の接触板支持座を、プロペラ軸の非駆動側端部又は
その延長軸端部の端面の中心部に軸接続用パイプを介し
て取付けて構成した軸側接続部と、 エンジンカバーに取付けた固定板と一体に形成され、銀
合金製のブラシを介して前記銀製の接触板と接触するブ
ラシホルダを内部に格納すると共に、前記ディスク状の
接触板支持座の外周面にゴム製リングを介して接触する
嵌合部を備えたブラシホルダ収納ボックスとによって構
成し、前記銀製の接触板と前記銀合金製のブラシとの接
触を介して前記プロペラ軸と船体との間の接地をとるこ
とを特徴とする軸接地装置。1. A disc-shaped contact plate supporting seat having a silver contact plate fixed to the center thereof is provided with a shaft connecting pipe at the center of the non-driving side end of the propeller shaft or the end face of the extension shaft end thereof. And a shaft holder connected to the engine cover, and a fixing plate attached to the engine cover, which is integrally formed with the brush holder and which contacts the silver contact plate via a silver alloy brush. A brush holder storage box having a fitting portion that comes into contact with the outer peripheral surface of the disk-shaped contact plate support seat via a rubber ring, and makes contact between the silver contact plate and the silver alloy brush. A shaft grounding device characterized by grounding the propeller shaft and a hull via the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8688592U JPH0638384Y2 (en) | 1992-11-25 | 1992-11-25 | Shaft grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8688592U JPH0638384Y2 (en) | 1992-11-25 | 1992-11-25 | Shaft grounding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0592985U JPH0592985U (en) | 1993-12-17 |
| JPH0638384Y2 true JPH0638384Y2 (en) | 1994-10-05 |
Family
ID=13899292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8688592U Expired - Lifetime JPH0638384Y2 (en) | 1992-11-25 | 1992-11-25 | Shaft grounding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638384Y2 (en) |
-
1992
- 1992-11-25 JP JP8688592U patent/JPH0638384Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0592985U (en) | 1993-12-17 |
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