著者
渡辺 専治 伊藤 勝行
出版者
公益社団法人 日本マリンエンジニアリング学会
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.30, no.9, pp.668-673, 1995-09-01 (Released:2010-05-31)
参考文献数
7

Recentry, engine troubles caused by water and mold in gas oil occur in pleasure boats, small training ships and co-gene plants, etc diesel engine systems. Mold stops strainer of diesel engine systems immediately and causes engine troubles.For preventing engine troubles, “Protect mold and water solubilizer” being added in gas oil and controling mold slduge is necessary. It is more simple and econo mical. As follows, we state “Protect mold and water solubilizer” deveroped by our Company.
著者
久保 博尚 長瀬 通昭 板谷 芳樹 大森 丈治 吉岡 勝
出版者
The Japan Institute of Marine Engineering
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.22, no.4, pp.263-270, 1987
被引用文献数
1

Various attentions have been paid to improvement of propeller efficiency. Among these devices, the free rotating propeller (vane wheel) to be fitted additionally behind conventional main propeller is the most attractive one. However the design method, blade strength, etc. of the free rotating propeller are not specified.<BR>The authors designed the free rotating propeller for the ship by applying the momentum theory and the blade element theory that are used for designing the hydraulic machineries. In this report, the design accuracy is compared with full-scale measurements and as the results, the following conclusions are obtained.<BR>(1) The calculated revolutions and energy saving rate of the free rotating propeller show a similarity to those of measurements.<BR>(2) Measured energy saving rate is 6-8.5% at same speed condition.<BR>(3) The mean blade stress is 2.6kgf/mm<SUP>2</SUP> {25 MPa} and the fluctuation of blade stress for a rotation is 8.8kgf/mm<SUP>2</SUP> {86 MPa} in peak-to-peak value.<BR>(4) The pressure fluctuation caused by main propeller is reduced by 20% at the blade frequency components.
著者
渡辺 専治 伊藤 勝行
出版者
The Japan Institute of Marine Engineering
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.30, no.9, pp.668-673, 1995-09-01
参考文献数
7

Recentry, engine troubles caused by water and mold in gas oil occur in pleasure boats, small training ships and co-gene plants, etc diesel engine systems. Mold stops strainer of diesel engine systems immediately and causes engine troubles.<BR>For preventing engine troubles, "Protect mold and water solubilizer" being added in gas oil and controling mold slduge is necessary. It is more simple and econo mical. As follows, we state "Protect mold and water solubilizer" deveroped by our Company.
著者
ガロワ ジャック 栄家 達也
出版者
The Japan Institute of Marine Engineering
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.22, no.12, pp.799-807, 1987

This paper shows that the new CODAD solusion using 4 engines and 2 propellers is interesting for a 2500 tons frigate, thanks to a new generation of diesel engines with low compression ratio and two stages turbo charging process (SEMTPielstick PA6BTC engines) and that the frigates up to 4500 tons and even 5000 tons can be built in the same way with the following advantages, that is, noise detection improved thanks to the elastic mounting of complete propulsion units, infrared detection improved, compact and independent propulsion units, very good survivability, narrow inlet and exhaust ducting, large flexibility of operation and large overhaul interval and easy maintenance on board by crew, etc..
著者
桑原 慎二郎 硴崎 貞雄 樋口 英登 高橋 慶吉 山地 正城
出版者
公益社団法人 日本マリンエンジニアリング学会
雑誌
日本舶用機関学会誌 (ISSN:03883051)
巻号頁・発行日
vol.20, no.2, pp.165-170, 1985-02-01 (Released:2010-05-31)

The Koyo Maru, the most advanced cable layer owned by the NIPPON TELEGRAPH & TELEPHONE PUBLIC CORP., incorporates latest technological achievements into her design; Here two systems, ACNAS (Advanced Cable-ship Navigation Aid System) and MICOS (One-man Control System), are reported in details as her typical automatic system.(1) ACNAS intends to combine and unite the various information such as design route, positioning, course record, target vessel data, degital map and data of cable laying and burying. This system achieved the mechanization of cable laying and burying and data recording works.(2) According to the change of ship modes (Rest, Stand-by, Work, Navigation), MICOS controls sequentially main engine, auxiliary machines and valves.These systems realized the remarkable improvement of accuracy, sure operation and labor-saving for cable laying works.