NO332151B1 - Rulledempningstank - Google Patents
Rulledempningstank Download PDFInfo
- Publication number
- NO332151B1 NO332151B1 NO20092940A NO20092940A NO332151B1 NO 332151 B1 NO332151 B1 NO 332151B1 NO 20092940 A NO20092940 A NO 20092940A NO 20092940 A NO20092940 A NO 20092940A NO 332151 B1 NO332151 B1 NO 332151B1
- Authority
- NO
- Norway
- Prior art keywords
- tank
- ship
- water
- movement
- tanks
- Prior art date
Links
- 238000013016 damping Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
- B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
Abstract
Oppfinnelsen omhandler et system for å finne riktig vannivå i rulledempingstanker i skip. Systemet omfatter belyste rulledempningstanker med kameraovervåking. Ved å få kameraovervåking av rulledempingstankene vil man se hvordan bølgen går i tanken og man kan justere vannivået til bølgen går i motfase til skipets bevegelse.The invention relates to a system for finding the correct water level in roll cushioning tanks in ships. The system includes illuminated roll damping tanks with camera surveillance. By getting camera surveillance of the roller damping tanks, you will see how the wave goes in the tank and you can adjust the water level until the wave goes counter-phase to the ship's movement.
Description
Den foreliggende oppfinnelse vedrører en fremgangsmåte ved drift av et rulledempingssystem på et skip, hvilket rulledempingssystem omfatter en tank som rommer en vannmengde som ved bølgebevegelse i tanken og i motfase med skipets bevegelse, motvirker at skipet ruller i sjøen, hvorved faseforskjellen mellom vannets svingebevegelse og skipets bevegelse registrere, og vannmengden i tanken regulere slik at vannets bølgebevegelse og skipets bevegelse er i nevnte motfase. The present invention relates to a method for operating a roll damping system on a ship, which roll damping system comprises a tank that holds a quantity of water which, due to wave movement in the tank and in counterphase with the ship's movement, prevents the ship from rolling in the sea, whereby the phase difference between the water's swinging motion and the ship's register movement, and regulate the amount of water in the tank so that the wave movement of the water and the ship's movement are in the aforementioned opposite phase.
Rulledempningstanker omtales som et passivt system for rulledempning. En rulledempningstank representerer et dynamisk system som må justeres etter hva som er av stabilitet/ trim i fartøyet, i tillegg til bølgefrekvensen. Dette er i dag umulig, spesielt på store fartøy med flere rulledempingstanker. Det å stå om bord i så store fartøy og skulle kjenne på båten når tid disse tankene er riktig justert og "synkronisert" er ikke bare vanskelig men nærmest umulig. I stabilitetspapirene til skip med rulledempningstanker er der oppgitt 1 eller 2 kondisjoner med oppgitt mengde for fylling av disse tankene. Dette er ikke å regne for annet enn eksempler og det kan hende at eksempelet vil virke i praksis i nevnte kondisjon men i alle andre kondisjoner vil den i beste fall virke dårligere og i verste fall mot sin hensikt. Det er i dag ikke noe system for kontinuerlig overvåking av slike tanker for å utnytte rulledempingstankenes muligheter maksimalt. Dette gjør at det i stor grad brukes feil væskenivå på disse. Dette utgjør en sikkerhetsrisiko for mannskaper, da skipet vil slingre mye mer. Det utgjør en risiko for skade på skipet og en risiko for skade på last. Det kan i ytterste konsekvens få katastrofale /fatale følger for skip og mannskap . Roll damping tanks are referred to as a passive roll damping system. A roll damping tank represents a dynamic system that must be adjusted according to the stability/trim of the vessel, in addition to the wave frequency. This is currently impossible, especially on large vessels with several roll damping tanks. Standing on board such a large vessel and having to feel the boat when these tanks are properly adjusted and "synchronised" is not only difficult but almost impossible. In the stability papers for ships with roll damping tanks, there are 1 or 2 conditions with a stated quantity for filling these tanks. This can only be considered as examples and it may happen that the example will work in practice in the condition mentioned, but in all other conditions it will at best work worse and at worst against its purpose. There is currently no system for continuous monitoring of such tanks in order to make maximum use of the roll damping tanks' capabilities. This means that the wrong fluid level is largely used on these. This poses a safety risk for crews, as the ship will wobble much more. It poses a risk of damage to the ship and a risk of damage to cargo. In the extreme, this can have catastrophic/fatal consequences for the ship and crew.
Ved å få et overvåkningssystem vil det etter mitt skjønn redusere skade på last, stress på fartøy og det vil i tillegg bli meget mer behagelig å være om bord. By getting a monitoring system, it will, in my opinion, reduce damage to cargo, stress on vessels and it will also be much more comfortable to be on board.
Så vidt kjennes finnes det i dag ikke et godt overvåkningsutstyr til rulledempningstanker noe som burde være obligatorisk og lovpålagt. As far as is known, there is currently no good monitoring equipment for roll damping tanks, which should be mandatory and required by law.
Når det gjelder kjent teknologi, skal det vises til publikasjonen av L. Palazzi, og J. De Kat med tittelen: "Model Experiements and simulations of a damaged ship with air flow tåken into account, japansk patent publikasjon JP-2006 219114 samt til publikasjonen "Ship Safety Bulletin, 01/2005. TP 3231 E. Transport Canada, 2005.05.18. Regarding known technology, reference should be made to the publication by L. Palazzi, and J. De Kat entitled: "Model Experiments and simulations of a damaged ship with air flow fog into account, Japanese patent publication JP-2006 219114 as well as to the publication "Ship Safety Bulletin, 01/2005. TP 3231 E. Transport Canada, 2005.05.18.
Den førstnevnte publikasjon (av L. Palazzi, og J. De Kat) beskriver overvåking av væskeinntrengning i en vingtank om bord i et fartøy. Dette blant annet for å finne ut hvordan fanget luft påvirker vannet som trenger inn. The first-mentioned publication (by L. Palazzi, and J. De Kat) describes the monitoring of liquid ingress in a wing tank on board a vessel. This is, among other things, to find out how trapped air affects the water that penetrates.
Det er åpenbart at en ren vingtank som omtales her har et helt annet fritt væskeoverflatemoment enn en rulledempingstank. Det er en vesentlig forskjell at en rulledempingstank i de aller fleste tilfeller vil være utformet slik at den går over hele skipets bredde, slik det gjelder for foreliggende oppfinnelse. It is obvious that a pure wing tank referred to here has a completely different free liquid surface moment than a roll damping tank. It is a significant difference that a roll damping tank in the vast majority of cases will be designed so that it runs across the entire width of the ship, as is the case for the present invention.
Når det gjelder artikkelen fra "Ship Safety Bulletin" så viser denne løsninger for å registrere forholdet mellom skipet og væsken, samt å justere tankens vannmengde, uten at artikkelen gir noen særlige detaljer rundt dette. As for the article from the "Ship Safety Bulletin", this shows solutions for recording the relationship between the ship and the liquid, as well as adjusting the tank's water volume, without the article giving any specific details about this.
Foreliggende ide til overvåkningssystem er følgende: Belyste rulledempningstanker med kameraovervåkning. Ved å få kameraovervåkning av rulledempningstankene vil man se hvordan "bølgen" går i tanken og man kan lettvint justere nivået til motfase. Altså kommer bølgen sent, indikerer det at det er for lite væske på tanken og man fyller opp. Kommer bølgen tidlig, indikerer det at der er for mye væske på tanken og man slipper ut. Også i forhold til at man har flere rulledempningstanker blir det svært enkelt å "synkronisere" tankene slik at man utnytter kraften i fri væskeoverflate momentet maksimalt. The proposed idea for a monitoring system is the following: Illuminated roll damping tanks with camera monitoring. By getting camera surveillance of the roll damping tanks, you will see how the "wave" goes in the tank and you can easily adjust the level to counter phase. So if the wave comes late, it indicates that there is too little liquid in the tank and you are topping up. If the wave comes early, it indicates that there is too much liquid in the tank and you are escaping. Also in relation to having several roll damping tanks, it becomes very easy to "synchronize" the tanks so that you make maximum use of the force in the free liquid surface moment.
Rulledempningstanker er et fantastisk hjelpemiddel, men verdien av dem reduseres dramatisk ved at man ikke har overvåkningsmuligheter. Anti-roll bars are a wonderful aid, but their value is dramatically reduced by the lack of monitoring capabilities.
Et slikt system vil også øke forståelsen for rulledempningstankene sin funksjon. Og også hjelpe skipskonstruktørene i videre utvikling av slike tanker. Such a system will also increase understanding of the roll damping tanks' function. And also help the ship designers in the further development of such tanks.
Fremgangsmåten ifølge oppfinnelsen er kjennetegnet ved det anvendes en kameraovervåkning som registrerer vannets svingebevegelse, på en slik måte at når bølgen kommer for sent i forhold til oppnåelse av nevnte motfase, fylles det vann i tanken, mens når bølgen kommer for tidlig, slippes vann ut av tanken. The method according to the invention is characterized by the use of camera monitoring which records the swinging movement of the water, in such a way that when the wave arrives too late in relation to the achievement of said counter-phase, water is filled in the tank, while when the wave arrives too early, water is released from the idea.
Fortrinnsvis anvendes det belyste rulledempingstanker, og tankveggene har lys maling for registrering av bølgegangen. I de tilfeller hvor det anvendes flere individuelle rulledempningstanker "synkroniseres" disse slik at man utnytter kraften i fri væskeoverflate momentet maksimalt Illuminated roll damping tanks are preferably used, and the tank walls have bright paint to record the wave path. In cases where several individual roll damping tanks are used, these are "synchronised" so that the force in the free liquid surface, the moment, is utilized to the maximum
Figur 1 viser et lengderiss av et skip 10 hvor det er innmontert fremre 12 og aktre 14 rulledempningstanker hver forløpende på tvers av skipet. Figur 2 viser et plansnitt av forskipet, med den fremre tverrstilte rulledempnings-tanken 12. Figur 3 viser et tverrsnitt av skipets 10 skrog og gjennom den tverrstilte fremre tanken 12 som er ca. halvfull med vann vist med tallet 16. Figuren antyder innstillingen av vannmassen ved tilnærmet korrekt motfase når skipet ruller i sjøgang. Tilpasning av kamera og lys 18 øverst i tankveggen vil måtte gjøres spesifikt for hvert skip og tilpasses. Maling på tankene bør nok være lys da det gir en bedre lysbæring. Figure 1 shows a longitudinal view of a ship 10 where forward 12 and aft 14 roll damping tanks are installed, each extending across the ship. Figure 2 shows a plan section of the foredeck, with the forward transverse roll damping tank 12. Figure 3 shows a cross section of the ship's 10 hull and through the transverse forward tank 12 which is approx. half full of water shown with the number 16. The figure indicates the setting of the water mass at approximately correct counterphase when the ship is rolling in seaway. Adaptation of the camera and light 18 at the top of the tank wall will have to be made specifically for each ship and adapted. Paint on the tanks should probably be light as it gives a better light transmission.
Nyheten er den visuelle overvåkningen av væskens bevegelse i tanken for så å kunne justere til riktig nivå med visuell kontroll. The novelty is the visual monitoring of the movement of the liquid in the tank in order to be able to adjust to the correct level with visual control.
Claims (3)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20092940A NO332151B1 (en) | 2009-08-06 | 2009-08-06 | Rulledempningstank |
BR112012002690-9A BR112012002690B1 (en) | 2009-08-06 | 2010-08-05 | EQUIPMENT FOR ROLLING DAMPING ON VESSELS |
PCT/NO2010/000297 WO2011016730A1 (en) | 2009-08-06 | 2010-08-05 | Roll dampening apparatus |
PT107529430T PT2462021E (en) | 2009-08-06 | 2010-08-05 | Roll dampening apparatus |
EP10752943.0A EP2462021B1 (en) | 2009-08-06 | 2010-08-05 | Roll dampening apparatus |
ES10752943.0T ES2446422T3 (en) | 2009-08-06 | 2010-08-05 | Pitch movement damping device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20092940A NO332151B1 (en) | 2009-08-06 | 2009-08-06 | Rulledempningstank |
Publications (2)
Publication Number | Publication Date |
---|---|
NO20092940A1 NO20092940A1 (en) | 2011-02-07 |
NO332151B1 true NO332151B1 (en) | 2012-07-09 |
Family
ID=43127456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO20092940A NO332151B1 (en) | 2009-08-06 | 2009-08-06 | Rulledempningstank |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2462021B1 (en) |
BR (1) | BR112012002690B1 (en) |
ES (1) | ES2446422T3 (en) |
NO (1) | NO332151B1 (en) |
PT (1) | PT2462021E (en) |
WO (1) | WO2011016730A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO336785B1 (en) * | 2011-10-26 | 2015-11-02 | Eirik Hellesvik | Method and arrangement of a roll cushioning tank in ships |
NO344388B1 (en) * | 2018-01-19 | 2019-11-25 | Mrpc As | U-tank active roll dampening system for and method for active roll dampening of a vessel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3422781A (en) * | 1967-05-08 | 1969-01-21 | Flume Stabilization Syst | Variably damped passive tank stabilizer |
GB1213853A (en) * | 1968-02-02 | 1970-11-25 | Muirhead Ltd | Improvements in and relating to ship stabilizers |
US3521593A (en) * | 1968-04-19 | 1970-07-21 | Flume Stabilization Syst | Phase controlled roll stabilization system for ships |
DE1916587B2 (en) * | 1969-04-01 | 1971-12-30 | Licentia Patent Verwaltungs GmbH, 6000 Frankfurt | METHOD AND DEVICE FOR REGULATING THE TANK LIQUID FREQUENCY OF A ROLLING TANK |
DE2355202C2 (en) * | 1973-11-05 | 1976-01-08 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Arrangement for determining the phase difference between the rolling vibration of a ship and the tank liquid vibration in a stabilization tank |
US3915109A (en) * | 1974-01-15 | 1975-10-28 | Flume Stabilization Syst | Phase sensing system for use with a ship stabilization apparatus |
JP2005291830A (en) | 2004-03-31 | 2005-10-20 | Shinko Engineering & Maintenance Co Ltd | Image measurement apparatus and image measurement method for liquid level |
JP2006219114A (en) | 2005-01-11 | 2006-08-24 | Noritaka Matsumura | Pitch and roll reducing device for vessel with liquid movement monitoring device |
-
2009
- 2009-08-06 NO NO20092940A patent/NO332151B1/en unknown
-
2010
- 2010-08-05 ES ES10752943.0T patent/ES2446422T3/en active Active
- 2010-08-05 WO PCT/NO2010/000297 patent/WO2011016730A1/en active Application Filing
- 2010-08-05 PT PT107529430T patent/PT2462021E/en unknown
- 2010-08-05 BR BR112012002690-9A patent/BR112012002690B1/en active IP Right Grant
- 2010-08-05 EP EP10752943.0A patent/EP2462021B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2462021B1 (en) | 2013-11-13 |
PT2462021E (en) | 2014-02-12 |
BR112012002690A2 (en) | 2016-04-12 |
ES2446422T3 (en) | 2014-03-07 |
WO2011016730A1 (en) | 2011-02-10 |
EP2462021A1 (en) | 2012-06-13 |
BR112012002690B1 (en) | 2020-09-29 |
NO20092940A1 (en) | 2011-02-07 |
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