JPH0148375B2 - - Google Patents
Info
- Publication number
- JPH0148375B2 JPH0148375B2 JP20935883A JP20935883A JPH0148375B2 JP H0148375 B2 JPH0148375 B2 JP H0148375B2 JP 20935883 A JP20935883 A JP 20935883A JP 20935883 A JP20935883 A JP 20935883A JP H0148375 B2 JPH0148375 B2 JP H0148375B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- pipe
- exhaust
- water jacket
- engine
- 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
- 239000000498 cooling water Substances 0.000 claims description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/004—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 specially adapted for marine propulsion, i.e. for receiving simultaneously engine exhaust gases and engine cooling water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
本発明は、舶用主機関の排気・排水装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust/drainage system for a marine main engine.
従来技術
例えば、セイルドライブ型舶用機関等の小型主
機関にデイーゼル機関を用いたものにおいては、
この主機関の排気を冷却水とミキシングして海水
へ排出することが行なわれている。この場合、主
機関の排気通路に連結される排気管を二重管とし
て、排気通路回りに冷却水溜りを形成し、冷却水
ジヤケツトからこの冷却水をこの冷却水溜りへ一
時滞留させ、しかる後排気と混合して排出するこ
とによつて、高温の排気通路を冷却することがで
きる。従つて、冷却水ジヤケツトと排気二重管と
は、連絡管等によつて連絡されるが、この場合、
排気ガス成分が冷却水に溶解して生成された強酸
性溶液が、前記連絡管から冷却水ジヤケツト側に
逆流し該ジヤケツト壁面の腐蝕を生ずる恐れがあ
る。また、このように連絡管によつて冷却水ジヤ
ケツトと排気二重管とを結ぶと、通常、冷却水の
出口部が該冷却水ジヤケツトよりも高くなり、機
関を停止した時に該冷却水ジヤケツト内の冷却水
を全て抜くことができず、同様に腐蝕を発生し、
かつ、凍結割れを起す虞れがある。Prior art For example, in a small main engine such as a sail drive type marine engine that uses a diesel engine,
The exhaust gas from the main engine is mixed with cooling water and discharged into seawater. In this case, the exhaust pipe connected to the exhaust passage of the main engine is made into a double pipe, a cooling water pool is formed around the exhaust passage, this cooling water is temporarily retained in this cooling water pool from the cooling water jacket, and then By mixing it with the exhaust gas and discharging it, the high temperature exhaust passage can be cooled. Therefore, the cooling water jacket and the exhaust double pipe are connected by a connecting pipe, etc., but in this case,
A strongly acidic solution produced by dissolving exhaust gas components in the cooling water may flow back from the connecting pipe to the cooling water jacket side and cause corrosion of the wall surface of the jacket. Additionally, when the cooling water jacket and the double exhaust pipe are connected through a connecting pipe, the outlet of the cooling water is usually higher than the cooling water jacket, so that when the engine is stopped, the inside of the cooling water jacket is It was not possible to drain all of the cooling water, and corrosion occurred as well.
Moreover, there is a risk of causing freeze cracking.
発明の目的
本発明の目的は、このように排気二重管を設け
て冷却水と排気を混合して排出するものにおい
て、冷却水ジヤケツト内への排気ガスの逆流を防
止し、かつ、該冷却水ジヤケツト内の冷却水を完
全に抜くことができるようにする点にある。Purpose of the Invention It is an object of the present invention to prevent the backflow of exhaust gas into the cooling water jacket in a system in which a double exhaust pipe is provided to mix and discharge cooling water and exhaust gas, and to prevent the exhaust gas from flowing back into the cooling water jacket. The purpose is to allow the cooling water in the water jacket to be completely drained.
発明の構成
上記目的を達成するため本発明では、機関排気
管を二重管として排気通路回りに冷却水溜りを形
成し、冷却水ジヤケツト底部とこの冷却水溜りを
連絡管により連絡して、前記冷却水ジヤケツト内
の冷却水をこの連絡管を介して前記冷却水溜りへ
供給し、しかる後排気と混合して外部へ排出する
ものにおいて、上記連絡管の冷却水溜り側の出口
を冷却水ジヤケツト底部よりも低くしたことを特
徴とするものである。Structure of the Invention In order to achieve the above-mentioned object, in the present invention, the engine exhaust pipe is made into a double pipe to form a cooling water reservoir around the exhaust passage, and the bottom of the cooling water jacket and this cooling water reservoir are connected by a connecting pipe, and the The cooling water in the cooling water jacket is supplied to the cooling water reservoir through this connecting pipe, and is then mixed with exhaust gas and discharged to the outside, in which the outlet on the cooling water reservoir side of the connecting pipe is connected to the cooling water jacket. It is characterized by being lower than the bottom.
実施例
以下本発明の構成を図示の実施例に基づいてよ
り詳しく説明すると、第１図において、１は船体
であつて、この船体１の底部に形成した開口部２
を取り囲むようにして、機関据付台３が船内側に
取付けられている。この機関据付台３には、防振
ゴム４，４を介して、エンジンマウント５が据付
けられており、このエンジンマウント５の上面
に、締め付けボルト６によつて機関７が一体的に
結合されている。他方、エンジンマウント５の下
面には、中間ケース８とロアケース９とからなる
推進装置が同様に一体的に結合され、ロアケース
９は、前記開口部２より下方へ突出している。１
１は、エンジンマウント５、中間ケース８及びロ
アケース９に跨つて垂直方向に配置されたドライ
ブシヤフトであつて、このドライブシヤフト１１
が、エンジンマウント５より機関７側に突出して
そのクランク軸へ連結されるようになつている。
他方、ドライブシヤフト１１の下端は、傘歯車か
らなる前後進切り換えクラツチ１２を介して前後
方向のプロペラシヤフト１３へ連結され、このプ
ロペラシヤフト１３に取付けたプロペラ１４を駆
動するようにしている。Embodiments Below, the structure of the present invention will be explained in more detail based on the illustrated embodiments. In FIG.
An engine installation stand 3 is attached to the inside of the ship so as to surround it. An engine mount 5 is installed on this engine mounting stand 3 via vibration-proof rubber 4, 4, and an engine 7 is integrally connected to the upper surface of this engine mount 5 with a tightening bolt 6. There is. On the other hand, a propulsion device consisting of an intermediate case 8 and a lower case 9 is similarly integrally coupled to the lower surface of the engine mount 5, and the lower case 9 projects downward from the opening 2. 1
Reference numeral 1 denotes a drive shaft vertically disposed across an engine mount 5, an intermediate case 8, and a lower case 9, and this drive shaft 11
protrudes from the engine mount 5 toward the engine 7 and is connected to its crankshaft.
On the other hand, the lower end of the drive shaft 11 is connected to a propeller shaft 13 in the longitudinal direction via a forward/reverse switching clutch 12 consisting of a bevel gear, and drives a propeller 14 attached to the propeller shaft 13.
上記構成において、エンジンマウント５には、
上端を開放した機関７のオイルパン１５が形成さ
れ、このオイルパン１５へ溜めた潤滑油を、該オ
イルパン１５内へ浸漬して設けた吸い上げ管１６
から機関７側へ供給するようにしている。そし
て、このオイルパン１５の後部には、その入口を
エンジンマウント５上端側に開口し、出口をエン
ジンマウント５後側面に開口した排気通路１７が
形成され、この排気通路１７と前記オイルパン１
５との間には、第２図で示すように、その下端開
口部を底板１８で覆われた冷却水ジヤケツト１９
が形成されている。 In the above configuration, the engine mount 5 includes:
An oil pan 15 of the engine 7 is formed with an open upper end, and a suction pipe 16 is provided by dipping the lubricating oil stored in the oil pan 15 into the oil pan 15.
It is designed to supply the engine 7 side from there. An exhaust passage 17 is formed at the rear of the oil pan 15, with an inlet opening toward the upper end of the engine mount 5 and an outlet opening toward the rear side of the engine mount 5.
5, there is a cooling water jacket 19 whose lower end opening is covered with a bottom plate 18, as shown in FIG.
is formed.
２０は、外管２１と内管２２とからなる排気二
重管であつて、内管２２の入口側端部にフランジ
３１が固着されて、このフランジ３１部において
エンジンマウント５後側面へ取付けられるととも
に、内管２２が前記エンジンマウント５の排気通
路１７へ連通し、他方、外管２１は、フランジ３
１の外側面へ固着されて、前記排気通路１７とは
連通していない。また、内管２２は、外管２１よ
りも短尺であつて、その出口側の端部がややラツ
パ状に外方へ拡開されて、外管２１内壁との間の
隙間に絞り２３を与えている。 Reference numeral 20 denotes a double exhaust pipe consisting of an outer pipe 21 and an inner pipe 22. A flange 31 is fixed to the inlet end of the inner pipe 22, and the flange 31 is attached to the rear side of the engine mount 5. At the same time, the inner pipe 22 communicates with the exhaust passage 17 of the engine mount 5, while the outer pipe 21 communicates with the flange 3.
1 and does not communicate with the exhaust passage 17. In addition, the inner tube 22 is shorter than the outer tube 21, and its exit side end is expanded outward in a slightly flared shape to provide an aperture 23 in the gap between it and the inner wall of the outer tube 21. ing.
冷却水ジヤケツト１９の前記底板１８には、冷
却水連絡管２４の入口端２５が連結され、この冷
却水連絡管２４は、該底板１８への取付部からそ
のまま下方へ垂下された後、更に後方へ屈曲され
て後方へ水平に延長され、しかる後上方に傾斜状
に析り曲げされて、その出口端２６が、前記絞り
部２３の近傍において外管２１へ取付けた継手パ
イプ２７へ外嵌して連結され、これによつて、冷
却水ジヤケツト１９からの冷却水を前記内管２２
と外管２１間の隙間２８へ排出するようにしてい
る。この場合、該隙間２８は内管２２の出口端部
分に絞り部２３が設けられていることから、該隙
間２８内に入つた冷却水は、まず、この隙間２８
内へ溜り、しかる後該絞り部２３より排出される
ものであつて、前記隙間２８が本発明の冷却水溜
りとなるものである。そして、この場合の冷却水
連絡管２４の出口３０は、前述したように内管２
２の出口における前記絞り部２３近傍にあつて、
即ち内管２２出口端側に設けて、図中の線Ｌで示
す冷却水ジヤケツト１９底部のレベルよりも低い
位置に設けられており、これによつて、該二重管
２０側からの排気ガスの逆流を防止し、かつ、冷
却水ジヤケツト１９内の冷却水を完全に抜くこと
ができるようにしている。排気二重管２０には、
その外管２１の端部に排気ホース２９が連結さ
れ、この排気ホース２９内で排気ガスと冷却水が
混合されて船外へ排出される。 An inlet end 25 of a cooling water communication pipe 24 is connected to the bottom plate 18 of the cooling water jacket 19, and the cooling water communication pipe 24 is suspended downward from the attachment point to the bottom plate 18 and then further rearward. It is bent to extend horizontally to the rear, and then bent upward in an inclined shape, so that its outlet end 26 is externally fitted into a joint pipe 27 attached to the outer pipe 21 in the vicinity of the constricted portion 23. This allows the cooling water from the cooling water jacket 19 to be connected to the inner pipe 22.
and the outer tube 21. In this case, since the gap 28 is provided with the constriction part 23 at the outlet end of the inner tube 22, the cooling water that has entered the gap 28 first flows through the gap 28.
The cooling water pools inside and is then discharged from the constriction portion 23, and the gap 28 serves as the cooling water reservoir of the present invention. In this case, the outlet 30 of the cooling water communication pipe 24 is connected to the inner pipe 2 as described above.
In the vicinity of the constriction part 23 at the outlet of No. 2,
That is, it is provided at the outlet end side of the inner pipe 22 and at a position lower than the level of the bottom of the cooling water jacket 19 indicated by the line L in the figure, thereby preventing exhaust gas from flowing from the double pipe 20 side. This prevents backflow of water and allows the cooling water in the cooling water jacket 19 to be completely drained. In the exhaust double pipe 20,
An exhaust hose 29 is connected to the end of the outer pipe 21, and the exhaust gas and cooling water are mixed within the exhaust hose 29 and discharged overboard.
なお、冷却水連絡管２４は、耐薬品性のある合
成ゴム管からなるものであつて、この部分に冷却
水が溜留することは差支えない。 Note that the cooling water communication pipe 24 is made of a chemical-resistant synthetic rubber pipe, and there is no problem with the cooling water remaining in this portion.
効 果
上記本発明の構成によれば、冷却水連絡管の冷
却水溜り側の出口を冷却水ジヤケツト底部よりも
低くしているから、排気二重管側からの排気ガス
の逆流がなく、そのため冷却水ジヤケツト内壁が
腐蝕を生ずる危険が減少するとともに、同じく冷
却水ジヤケツト内の冷却水は略完全に抜くことが
できるから、該冷却水ジヤケツト内の冷却水が凍
結して割れ等を発生する虞れがなくなるといつた
効果が得られる。Effects According to the above configuration of the present invention, since the outlet on the cooling water reservoir side of the cooling water communication pipe is set lower than the bottom of the cooling water jacket, there is no backflow of exhaust gas from the exhaust double pipe side. The risk of corrosion on the inner wall of the cooling water jacket is reduced, and since the cooling water in the cooling water jacket can be almost completely drained, there is no risk of the cooling water in the cooling water jacket freezing and causing cracks, etc. When this is eliminated, the effect obtained is obtained.
第１図は、本発明実施例を示す船内外機の要部
縦断側面図、第２図は、第１図の要部拡大図であ
る。
１９……冷却水ジヤケツト、２０……排気二重
管、２１……外管、２２……内管、２３……絞
り、２４……冷却水連絡管、２８……隙間（冷却
水溜り）、３０……出口。
FIG. 1 is a longitudinal sectional side view of a main part of an inboard/outboard motor showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the main part of FIG. 1. 19...Cooling water jacket, 20...Double exhaust pipe, 21...Outer pipe, 22...Inner pipe, 23...Aperture, 24...Cooling water connection pipe, 28...Gap (cooling water pool), 30...Exit.
Claims (1)
却水溜りを形成し、冷却水ジヤケツト底部とこの
冷却水溜りを連絡管により連絡して、前記冷却水
ジヤケツト内の冷却水をこの連絡管を介して前記
冷却水溜りへ供給し、しかる後排気と混合して外
部へ排出するものにおいて、上記連絡管の冷却水
溜り側の出口を冷却水ジヤケツト底部よりも低く
したことを特徴とする舶用主機関の排気・排水装
置。 ２ 二重管とした排気管の内側の管出口端を外方
へ拡開させて外管内壁との間に絞りを形成し、こ
の絞り上流部を冷却水溜りとした実用新案登録請
求の範囲第１項記載の舶用主機関の排気・排水装
置。[Scope of Claims] 1. The engine exhaust pipe is made into a double pipe to form a cooling water pool around the exhaust passage, and the bottom of the cooling water jacket and this cooling water pool are connected through a connecting pipe to cool the inside of the cooling water jacket. Water is supplied to the cooling water reservoir through the connecting pipe, and is then mixed with exhaust gas and discharged to the outside, wherein the outlet of the connecting pipe on the cooling water reservoir side is lower than the bottom of the cooling water jacket. Exhaust/drainage system for marine main engines featuring: 2. The scope of the utility model registration claim, in which the inner pipe outlet end of a double-pipe exhaust pipe is expanded outward to form a throttle between it and the inner wall of the outer pipe, and the upstream part of the throttle is a cooling water reservoir. Exhaust/drainage system for a marine main engine as described in paragraph 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20935883A JPS60101215A (en) | 1983-11-07 | 1983-11-07 | Exhaust and drainage devices for marine main engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20935883A JPS60101215A (en) | 1983-11-07 | 1983-11-07 | Exhaust and drainage devices for marine main engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60101215A JPS60101215A (en) | 1985-06-05 |
| JPH0148375B2 true JPH0148375B2 (en) | 1989-10-19 |
Family
ID=16571618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20935883A Granted JPS60101215A (en) | 1983-11-07 | 1983-11-07 | Exhaust and drainage devices for marine main engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60101215A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10934911B2 (en) | 2019-01-14 | 2021-03-02 | Caterpillar Inc. | Heat shield system and method |
-
1983
- 1983-11-07 JP JP20935883A patent/JPS60101215A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60101215A (en) | 1985-06-05 |
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