DE1934094A1 - Rolling tank - Google Patents

Description

The invention concerns an anti-rolling tank for the eradication .. periodic, excited by sea movements of a floating body, in particular the rolling motions of a ship, consisting of two partially filled wing tanks which are flowing through channels for transmitting the in ^'' _t the contained liquid tank and the iAift above are connected when the tank moves.,. · \

Bilge tanks of this kind are known in marine technology for quite some time; the classic U-Tank or _H <>; i Frahm'sche Tank (H. Prahm: "Novel Schlingertanks zur * ^ .ft

Attenuation of ship full turns and their successful *. Iy

■ ■. - .. ■■■■■. · _: 2Λ : m

Application in practice ". JSTG Hamburg , 1911) exists

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two tin rope with liquid-filled side tanks that in its lower (Deil through a fluid channel, in their upper part are connected by an air duct. When the height of the liquid channel is greater than that Height of the liquid level, so one and the same serves Channel as both a liquid and an air channel, man then speaks of a tank with an open transverse channel (! »Vaota, A.X. Giddings, A.Ealpin, I.I. Stilwell: "Boll Stabilization by Means of Passive Tanks ". aJ.S.! I.A.M.E. Volume 69, 8 <? w York, 196-1).

It is also already known (I.H. Chadwick and K. Klotter; "On the Dynamics of Anti-Roll Tanks". "Schiffatecbnik", S. Heft, February 1955, Volume 2, Hamburg »and G.I. Goodrich: "Development and Design of P & ssive: Should Stabilizers", T.fl.I.N.A., London, 1968) that the rolling tank only then works satisfactorily when its natural frequency is around is the same size as the HolloigGafreguens' of the ship, or In the case of absolutely regular arousal (e.g. specific Kuirt in

- regular swell): ^ if "the fuel frequency is 4%

is jammed with the waves. It is also known that the Schlingert’s own characteristics. The stabilizing effect is strongly influenced by low intrinsic damping, which is favorable in rough seas, when the natural frequency of the tank decreases to the exciter frequency; and a medium self-sufficiency is more favorable in the case of uneven seas. e is dependent on the ship’s own frequency ; i; -

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If the damping is very high, the roll-eliminating effect of the Schiingertanks strongly back.

The optimal natural frequency and the optimal natural damping can be determined for each case of loading of the ship due to Model tests or determined by theoretical considerations. The favorable values can also be determined through problems if suitable control options and measuring instruments are available.

The flow control required for optimization was previously by changing the cross-section of the fluid channel between the side channels, which changes the effective reduced © pendulum length. Will the upper ^ area of the side tank kept constant or almost constant, the passage cross-section over a longer one If the route changes, the © Pendellähge changes and with it also the sequence. The easiest way is to use the cross section narrows or widens a longer distance in the fluid channel; all known suggestions for frequency control can be traced back to this principle.

• So it is already known (German * Patent Hr. 1 153 283) »'the cross section through 2w © i roof-shaped arranged plates of variable Gi & beihöh © su v @ r @ ng @ n. This Aftlage has little frequency effect with very high damping influence, as dtse ßsu @ rlieh äuvuh ^ atereuehung öreieck-shaped Versngua-

f 0 9 8 T 5/0 9 Θ S -

gene has been proven (Volpich: "New investigations about Schlingertank-Anlagen ", J.S.I.G, Vol. 62, Hamburg, 1968).

One has already tried (German. Auslegeschrift 1 262 812), the ceiling of the 'liquid channel, together with the inner walls of the side tanks, vertically adjustable to construct.

In these known devices, the cone organs are outside neat big. Problems also arise with regard to sealing and structure on; the adjustment forces are very large. This makes the Anigen heavy, expensive and difficult to use.

The liquid channel can also be formed by the floor walls of the double bodons to be divided into a number of Einsekanal (Blohm & Voss brochure; "Ship stabilization systems", Hamburg, 1968), whereby (each channel has its own flap, which can be closed or opened individually or together with the flaps of the other channels six-stage frequency control with six channels and six individual flaps, which are distributed over three adjustment shafts are possible. This system requires the arrangement of several ver. control mechanisms and was apparently created for only graduated adjustment.

In the known Sank open cross-channel verification dor liquid cross-section changes with the level height, which is why the Frequens äuvch Jbderung the Spiegelhöh * vari- at DIE α em tank type

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can be ized. The disadvantage of this measure is that the Change of the mirror height compared to an average optimal ' Setting a loss of stabilization capacity init .. Bich brings, since when the level is lowered the available water mass is reduced or when the level is raised, the free water Tree is constrained from side to side can absorb overflowing water masses

It is also known that those already mentioned by Frahm (H. Er ahmi "New types of rolling tanks to dampen full ship movements and their successful application in the; Praxi8 ", J.S.3J.G. Eamburg WO arranged shut-off valves in the air duct in the partially open state the self-damping greatly increase. With such strong attenuation increases but the natural frequency also changes

The ideal solution would of course be to have two independent adjustment devices, one of which only influences the natural frequency, the other only influences the natural damping.However, it does not seem possible to find a frequency controller for a roll tank that does not influence the natural damping at all . On the other hand, as will be shown later, it is quite possible to design attenuators which influence the attenuation by several 100 #, while their secondary influence on the frequency remains practically negligible, ie 1% at most 2 %.

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The aim of the invention is therefore to create a rolling tank of the genus mentioned at the beginning, in which the Natural frequency within wide limits, preferably from 40 - 10 (056, can be changed without taking the self-damping to extremes grows, (under a good frequency control there is one understand such au, in which the attenuation changes by about the same percentage as the frequency) and in the further the self-damping within wide limits, preferably around

several 100 '#, in extreme cases, up to 500% ,. to be changed can without significantly affecting the natural frequency, e.g. um. more than 1-6 ^ is affected *

For this purpose, the invention provides that the channel system for the. Liquid transport is divided into a Hegler channel and at least one circulation channel connected in parallel, with a control element designed as a slide or rotary flap in the form of a full plate in the control channel for the purpose of frequency control, while a second control flap or a second control slide is attached as a perforated ' ^: plate is formed, which is installed to adjust the tank self-damping both in the Hegler channel and in the circulation channel or ^ in the circulation channels. Due to this design, it is possible to first adjust the frequency using the frequency controller and then to optimally adjust the damping, without the need for the frequency change associated with the damper adjustment, after the damping adjustment · Ij

? '- "' ■ S another correction of the frequency by means of the frequency controller. '.. ι

to plan. . '*

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The invention thus creates easy-to-use, fast adjustable control elements for the natural frequency and the natural damping of a ship, the upper and lower limits of the ITfrequency and damping control by the requirements determined by the extreme loading conditions of the ship in service. An important The requirement is that the adjustment can be done quickly, so that emotional readjustment or instrument-controlled. readjust against the standard settings specified in the operating instructions can. This important requirement is met by the training according to the invention.

Advantages and details of the invention emerge from the following description with reference to the drawing; in this shows:

Figure 1 is a schematic cross section of a frequency control only certain rolling tanks according to the invention,

FIG. 2 shows an eahematic X-section of the one shown in FIG.

FIG. 3a shows a schematic cross section of an Si® essentially independent ©! Fcequons * - vmä Sohlingertanks permitting damping regimes according to the principle

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FIG. 5b shows a schematic longitudinal section of the object of Fig.5a, the

4 'and 5 are schematic cross sections of further embodiments of the damping regulator according to the invention,

FIG. 6a shows a schematic cross section of a further embodiment of a roll tank according to the invention,

FIG. 6b shows a schematic longitudinal section of the object of Fig. 6a,

FIG. 7 is a schematic plan view of a further embodiment a roll tank according to the invention,

FIG. 8a shows the schematic cross section of a further embodiment a roll tank according to the invention,

FIG. 8b shows a schematic plan view of the object of FIG Fig.8a,

FIG. 9a shows a schematic longitudinal section of another Embodiment of a roll tank according to the invention,

FIG. 9b shows the same cross section as FIG. 9a, but with around 90 ° adjusted damping and frequency flap, and

FIG. 9c shows a schematic cross section of the object of Figure 9b.

The embodiment of the rolling tank according to the invention shown in FIGS. 1 and 2 comprises the side tanks 1, 2, the fluid-wise through © inen connecting channel 14 at the lower end stay in contact. At the top end there is an air connection duct 15 look ahead.

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The side banks 1,2 are filled to the extent that the liquid level 11, 12 are located above the level of the connecting channel 14. . .

According to the invention, the liquid channel 14 is in the simplest case according to FIGS. 1 and 2 by a longitudinal partition 3 divided into zvjoi parts. One of those two parts, the Regulator channel 4, receives a slide 5, while the other part is left free as a circulation channel 6. When pulled up With the slider folded or folded, the tank according to FIG. 1 behaves essentially like a classic tank without internals. if however, if the slide 5 in the control channel is set to a certain degree of closure, the drag coefficient in the control channel becomes increased per meter of duct width compared to the corresponding coefficient in the circulating duct.

Since much higher flow velocities prevail in the channel 14 than in the side tanks 1, 2 the total inertia of the rolling tank is mainly determined by the cross section of the channel 14, so that the increase in the inertia in the channel results in a very considerable frequency change in the manner described above - * brings with it. If, for example, the channel is divided according to the invention in such a way that the control channel 3/4 and the circulating channel 1/4 occupy the entire channel width, the kinetic energy and thus the inertia; the entire system to four times, © rhöht when dov slide 5 is closed * This means sn'ößnr-o ^ IvujH ·; 2.ι "* M 'Μζ eiiut almost Looe ^ igs Kndenmn d © r.Eigen-..

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Kit help of the slide 5 in the regulator channel 4- can according to the invention that is, all intermediate values of the tank frequency can be set steplessly with controller positions between the open and closed slide. The Resistance of the slide 5 not only a loss of energy, but on the contrary primarily a change in frequency Of course, the flow resistance of the slide 5 also has an effect in the arrangement according to the invention the attenuation off. But this effect is incomparable be smaller than with an undivided channel and a continuous slide. According to the invention, it is therefore important that the slide occupies only part of the channel, precisely that part in which the speed is opposite the mean flow rate is significantly reduced when the slide is in the regulator position. Hit the. Velocity decrease but the attenuation is quadratic ' return"

The self-damping is changed to a limited extent depending on the frequency setting; but ^one always remains between the two limits, resulting in open and closed Begierkanal.

1 and
The arrangement according to the invention determined by FIG. 2 therefore represents a frequency regulator which, with minimal damping influence, the frequency within a wide range

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can be set continuously and quickly. The frequency regulator requires a single veretellmeehanism with very small ones Adjustment forces and consists only of a single, easily manufactured and attachable slide

Apart from the effect of one-sided influence of resistance in the channel, the slide has an effect on the frequency due to its hydrodynamic wetness. This hydrodynamic Hasse is favorable for the frequency control »but is not the only frequency control, as inclined above Component, since the frequency regulation in the arrangement according to the invention is mainly due to the otherwise damaging flow resistance component worried but it is useful to keep the hydrodynamic hatred of the slide as large as possible even with the arrangement according to the invention.

According to the invention, the frequency regulator is no matter whether it is a slide or flap, preferably designed as a full plate, which can, however, be profiled.

The frequency regulation proposed by the invention takes place therefore due to completely different physical principles than the previously proposed frequency change methods.

In the simplest embodiment of the invention takes place so only one stepless, largely independent of attenuation

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Frequency control by a single slider or a only flap instead of »In a preferred further education however, a largely frequency-independent damping control should also be provided, which, by the way, also alone could be used. Such a damping control is formed according to the invention by a slide 8 which extends transversely through the entire channel 14 and has a flow resistance remains the same for the same degree of closure, but its hydrodynamic hatred is reduced.

According to FIGS. 3 to 5 i3 "& the damping controller according to the invention as a grate 15t comb 16 or perforated plate 1? designed in such a way that when it is adjusted, its flow resistance is maintained, but its hydrodynamic hatred is reduced «There Valves have a higher hydrodynamic hatred than flaps and are used for damping control compared to flaps preferred »Sliders are used in particular when the individual strips of the comb-like slider plates 16 lie with their axes parallel to the direction of adjustment of the slide.

According to the invention, it is also possible to place the individual strips of the damping control flap 16 behind one another instead of in one plane to be arranged on their own axes of rotation.

According to the invention, damping regulators can be installed in the liquid channel and in the air channel in the same way.

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3a and 3b show the common arrangement of a frequency regulator 7 and a damping regulator 8 in the liquid channel 14. The Iiingsschott.3 only extends up to the damping regulator 6 »The local height of the channel 14 at the point where the damping regulator * .8 is arranged, is h, the width "refers to" a lining plate of the ens DMmpfungsreglers with _hg:

The damper according to the invention is preferably designed in such a way that the frequency difference caused by it does not amount to more than 1%, at most 6 % of the original frequency. This can be achieved by a suitable choice of the number of plate strips located in a plate plane. If the strips are so small with the arrangement of only one damper flap 15 that they would be weak in terms of strength, the invention proposes to switch several damper flaps one behind the other with weaker individual action, which are actuated by a common adjusting mechanism. .

Similar considerations apply to the comb-like slide according to FIG. 4 and the perforated flap 1? according to FIG. 5.

The H @ g © ls ^ st @ m according to the invention can not only be used in context Use with U-iiJanks, but with a special! also "at Sshlingertanke old free canal surface according to

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Fig. 6a and b ". The vertically extending channel 18 is through a horizontal plate 19 into an upper and one iinter part 20, 21 divided. The upper rope 20 is after as before a canal with a free surface, while the lower rope 21 practically forms the Κρ ** ρΈ of a U-Ssnks · The Hegler Canal is the upper channel part 20, in which the irequenaregler 9 is arranged

The attenuation regulator 10 extends both over the regulator duct 20 and over the lower, covered circulation duct. The particular advantage of this design is "that when the srecpiens flap 9 is open, the sink works as a sink with a free surface" and it already has a medium self-evacuation The frequency flap 9 is closed, the sink works like a pure U-tank, the capacity of which is relatively smaller than the capacity of a sink with a free surface of the same sequence ^ what sB at the U-fanl; kut leads to an increase in self-damping. The change in the type of rope from a sink with a free surface to the U-tank has the opposite effect, so that in such a sink the end dampers are only slightly different when the traffic flap is open and "when it is closed" and it can even be achieved with suitable construction can that the self-apperation by the Fr @ Quenssklappe 9 has no influence at all. Hi? «!. So that has corn.

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So a type of tank in which not only you damper flap 10 is practically free of effects on the frequency, but rather the frequency flap 9 also has no effects on the damping. This increases the effectiveness of the two control elements e independent in every way what a represents a particularly advantageous solution.

If a particularly large frequency control range is required, the one in ag. 7, the arrangement shown in plan view is particularly advantageous. As in the other embodiments, the liquid channel is divided into a leveling channel 24 and a circulation channel 22 However, measured in the transverse direction of the ship, the two channels are not the same length, but the overflow channel 22 points through the inner walls 23 of the side tanks 1, 2 through an extension 25 kit with an approximately constant cross section into the side tanks 1, 2. If the frequency flap is closed in this arrangement, not only is the cross section of the circulation channel increased, but also its length, which increases the desired frequency reduction. It is important that the basic attenuation does not experience any additional increase when the ireommunikationsklappe closed due to the lengthening of the circulation duct, since the effect of a duct on the attenuation is practically independent of the duct length and is essentially only influenced by the cross-sectional ratio duct / side tank.

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In the case of large tankers, they often use the cargo tank of a part of the ship as a rolling tank. The principles given above can also be used particularly advantageously here. 8a and b show a tank with two longitudinal bulkheads 25 which are provided with connecting openings 26 which can be closed gradually by flaps or slides 20. Through these openings 26, the liquid, which here consists of the cargo liquid, can flow from one string tank into the other through the central sump. In addition, the two side tanks are connected to one another by one or more closed fluid channels 27 and one or more air channels 28. When the openings 26 provided in the bulkheads are partially or completely closed, the liquid is forced to flow partially or completely through the closed channels 27? which play the role of the circulation channel here, to flow, whereby the frequency is reduced at the slightest unintentional increase in damping. By connecting the two side tanks through an air duct 28, the air space 29 becomes in the littleren one. Tank part completely enclosed, so that the liquid in this Hitteltank not change their average level in the work of the anti-rolling tanks, Cuh _t that the average 5? Ank 55 acted merely as Hoglerkanal Therefore, one can, without compromising the antiroll tanks effect, the middle! Tank including the completely fill air spaces 29 shown in FIG. 8, so that only the air spaces of the loading volume due to the arrangement of the rolling tank

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get lost in the two side tanks »The arrangement allows it auoh to mount a damper in the air duct 28, so that Even with Jankern the Hegel principle according to the invention can easily be applied realize is and then a variant of the inventive Arrangement represents

Ss - it is possible that on simpler, cheaper ships, for economic reasons, you can rely on the separate damping regulator waived.

According to the I? Ig. 9a to c, a damper flap 31 and a frequency flap 32 are arranged on one and the same adjusting shaft, namely in planes that are perpendicular to one another (FIG. 9 «When the frequency flap 32 is closed (FIG. that through them the attenuation in the circulation channel, the yes remains open in this case, is not affected. If the frequency flap 32 but open (Figure 9 _o b and c), d.fcu it is set at the highest frequency, so the The damper is brought into di @ lags of maximum effectiveness by the same shaft rotation that is necessary to open the frequency flap .

When arranging rolling tanks, P: on when the ballast mstaseatrum is extremely high U ';

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than the ketazsntren that can arise in a loaded or in a half-loaded state. This is often the case with container ships, for example. Experience has shown that if the roll tank is used in such a way that it gives good target reduction values in the ballast state, ie between 65% and 80 % , the roll tank already has a free surface which, on loaded journeys, impermissibly lowers or even eliminates the already smaller metacentric height with regard to static stability. In such cases it is customary to arrange two rolling tanks. During ballast travel with a very high heta center, both rolling tanks are then in operation, while with a loaded journey with smaller heta centers only one.

According to the invention, one of the rolling tanks is used in such cases according to the principles given above for. the damping and frequency control for the conditions of the half-loaded to fully loaded ship is trained, while further, so that the stabilization conditions can be fulfilled in the ballast state, a second; non-controllable Tank, which is otherwise used as a normal ballast tank, is built into the ship. This tank will designed according to the invention for a frequency that is slightly higher than the highest frequency of descent required for ballast travel, and through corresponding built-in components that increase the resistance he receives a medium self-damping. With ballast " During the journey, this tank is also used as a rolling tank. Of the

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others, designed for the Bel & dene Wahrt © Sank will also remain in operation. With this solution, however, the two rolling tanks have different natural frequencies. The overall effect of these two tanks with different natural frequencies on can be imagined in such a way that with a devised high frequency of the ship, both tanks vibrate with different bubbles. You add the components of these moments of 0 ° phase (cosine or blind components), just like the moment components of 90 ° phase (sine or repayment components) ßkalar together and form a new resulting moment with a new phase of the ship's movement. The apparent common natural frequency of both tanks together results from the frequency at which the sum of the reactive components becomes equal to UuIl. Since the magnitude of the resulting torque and the resulting phase angle also changes if the natural frequency is changed only from one of the rolling tanks, the natural frequency of the overall system and, within certain limits, its resulting. Damping can be achieved by regulating only one of the rolling tanks. The regulation of this resulting stabilizing effect by only one of the two banks is of course tied to narrower limits than the regulation range of a single adjustable tank alone. However, the limited control range for the ballast state does not mean any disadvantage for the regulation, since experience has shown that in ships with these problems, the possible met az ent smell heights and there-

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with the possible roll frequencies of the ship can only be changed to a limited extent, so that these ships a larger control range is also necessary for the ballast state.

. In normal ships, their smallest and tallest are metacentric Height behave at most as 1: 2.2, you get with a single controllable roll tank according to the invention the end. The double tank method only needs to be applied to become if, in special cases, the metacentric height in the ballast state is the highest metacentric height in the laden State e.g. 3 times or more exceeded. The double tank method with a controllable and a non-controllable tank can be used, for example, with advantage in a type of ship whose The metacentric height in the loaded state is 1.10 m, but in the ballast state is 5 »50 m.

A particular advantage of the invention is that the tight and stepless controllability of the rolling tank according to the invention allows the rolling tank without precise knowledge the met as entri see to adjust the height of the ship by trial and error · This avoids cumbersome and often impossible calculations. The captain can do this rely on his emotional assessment of the strength of cbs Eollens or on the observation of an inclination indicator. Of course, this includes certain inaccuracies, in particular, part of the inclines usually installed on board

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indicator not the real one, but the apparent one
Specifying the horizon »The arrangement of simple, suitable instruments allows for a reliable setting that is very close to the optimum lags behind by a quarter of a period »One can achieve this state through it
determine that certain quantities of movement of the ship and the liquid occur simultaneously in certain characteristic phases of the coll’s movement, for example:

~ When the ship goes through its original rest position ^

Ship: Tank liquid:

Deflection: O maximum

Speed: maximum O
Acceleration: O maximum

- When the rolling ship has reached its maximum inclination.

Ship: Tank liquid: Rash :
Speed:
Acceleration:

These facts have long been known to the art

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Maxi room O 0 maximum maximum 0

are "exploited" when controlling automatic systems = - In active systems, the phases occurring compared to the synchronisms described above are continuously measured, and the power source is controlled in such a way that these differences disappear as possible in the next period. With a passive system that are not periodic in each half = set only once during a Heise but only a few times is adjusted, it is important that the synchronistic described above are achieved in the lateral center d _e h * should deviate-_ .. "chings of these ·. Synchronisms in both directions occur about equally often,

For this purpose it is proposed according to the invention that one movement variable of the ship and one of the tank liquid is measured by a measuring instrument and that the two measuring instruments emit a signal either when they pass through the Hull or when the maximum measured value is reached Let a flashing lamp light up * The order in which these flashing lamps light up indicates whether the roll tank is correctly set or not * If the setting is correct, the flashing lamp, which shows the measurements of the ship's movements »lights up first as often as the flashing lamp which is controlled by the movements of the tank liquid «If one of the lamps

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pen more often than the other, so a correction of the setting is required file is also given an indication of the direction: If the lamp, which is controlled by the ship's movements, is too often. lights up early, then the frequency of the roll tank is closed. set low and vice versa »

This control method can be made more convenient and reliable * if the sequence of signals is counted by a counter in every half cycle of the ship's movement o For this purpose, for example, a contact counter can be used whose pointer precedes the liquid movement when the ship movement leads and when the positive movement of the ship movement ahead _? made an equally large movement in the opposite direction. If you have such a device on board and this is set to Hull when the ship leaves, the pointer of the device will show only minor deviations from the zero point after several minutes in the sea, whereby these deviations can be positive and negative »However, if the pointer begins to move forward in one direction on average, this is a sign that one of the two possible sequences occurs more frequently than the other,

One look at the contact counter, at any time--

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point of the voyage, enables the officer on watch to determine whether the roll tank is properly adjusted and, if not, in which direction must be readjusted = This releases the ship's command from the exact calculation the metassentric height, in particular from the recalculation of fuel consumption, etc- during the Changes occurred in the met @ .2entric trip In addition, this method eliminates uncertainties in the calculation of the effective metacentric height and the resulting Pehleinstellv.ng .ng. of the rolling tank switched off *

In addition, the proposed method also takes into account the current state of the sea, since the roll tank setting does not exactly match the natural frequency of the ship, but is set to the excitation frequencies to which the ship is currently operating Most responsive to swell *

A concrete example of a preferred embodiment according to the invention is to be given below:

The roll acceleration of the ship and the Flow velocities of the liquid channel dee Roll tanks are measured, according to the first of the tables given above, both measured values must be simultaneous

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go through their zero points * This combination is chosen because the point in time of the zero crossings can be determined more precisely than the reaching of a maximum or minimum value »The roll acceleration of the ship's hull can be measured in different ways = two linear accelerometers are selected, which are cheap and not Are prone to failure ο These are as far from each other as possible in a cross section of the ship, dob. Attached as directly as possible to the ship's sides, and so that their measurement direction is vertical =, The electrical measurement signals of both sensors are connected in series with reversed poles ο This means that the vertical accelerations, which come from the submerged vibrations of the hull, are maintained, and those vertical acceleration components, which come from the rolling of the hull, added together electrically - The end poles go to a potentiometer that actuates a relay with every zero crossing ο

In this example, the speeds of the liquid are measured by a gel wheel in the liquid channel. If the water stops, the impeller also stops (if the mass moment of inertia of the instrument is correctly adjusted) and then begins to turn in the opposite direction. The impeller, the one small one Operates generator, supplies an alternating current of -— ■

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. the frequency of fluid movement «. This one slowly alternating current can be measured by a potentiometer and actuate a heater at the zero crossings »

The contact counter is designed as a pointer instrument with a scale, in such a way that the counted current surges cause a right-directed or a left-directed jump of the pointer depending on polarity of the accelerometer come, move the pole-changing switch one step to the right (or to the left), and current surges from the relay of the liquid velocity meter move the pole-changing switch one step to the left (or to the right) _{a ;}

The neutral position of the pole-changing switch is in the middle position »If the signals from the two measuring instruments alternate regularly, so represents the signal of a .der In ^ always use the pole-changing switch for a surge of electricity Counter in the direction belonging to it, while the other encoder only switches the pole changer to the zero position but never sends a signal to the contact counter «? gives »It follows that the pointer, the contact counter at every half cycle of the ship's movement, always. moved on in the same direction '.. · ■ · ^ -. · "» ■

If the pole-changing switch is in one of the end positions and the measuring instrument moves it to the other pole position heard, pressed twice in a row, the Zei ^ ger of the contact counter set back by one unit <> This means that, whenever the same signal occurs, the others are ahead, the pointer of the contact counter in one Direction rotates- BiIt but one of the signals in a half period ahead of the other and if the signal frequency reverses in the other half cycle, the pointer of the contact counter goes by one in the first half cycle Step further, but will be deferred in the second half-period

If the signal sequence changes regularly in the successive half-periods within a longer period of time, the pointer of the contact selector will therefore only move moderately away from its Hull position even in longer periods of time ^ But if one of the signals leads the other more often than the other, the pointer will continue to turn in one direction over time _c The speed at which the pointer continues to turn in one direction is also a measure of how much more often one signal = follows the other -

This simple arrangement of instruments enables the ship's command to continuously check the setting of the frequency flap of the roll tank , and by means of the instrument indicators, the ship's command can find the best length of the line within a short period of time.

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In addition to the contact counter, which is used to control the fre * quenzklappe is used, the ongoing measurements of the Accelerometer either by a light beam or duxch a pointer display can be made visible? To Correction setting of the frequency flap, the on-board line can adjust the damping flap so that the deflections of the acceleration indicator come to the lowest possible values on average ο This makes the perfectly optimal . Adjustment according to the loading condition of the ship ™ and the swell asu stood for so long. as the Weather does not change to a greater extent, or the ship does not change course or in the metacentric view Height of the ship does not change - If after such changes the roll tank setting does not occur remains optimal, you can do this based on the readings of the contact counter and the scrolling acceleration displays recognize and adjust the rolling tank accordingly «

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BAD ORiGfNAL

Claims (1)

Claims 1. Schlingsrtank for eradication of periodic waves due to swell excited movements of a swimming body, especially special of the boll movements of a ship, consisting of two partially filled side tanks, which through Channels to flow over those contained in the SJanks Liquidity and the air above it when moving des sinks are connected, characterized in that the channel system for the Fluid flow into a companion canal (4,20,24,53) and at least one circulation channel connected in parallel (6,21,22,27) is divided, whereby in the companion channel for the purpose of frequency control as a slider or as Rotary flap designed control member in the form of a full plate (5 7, 9, 26, 52) attached 1st, while a second control flap or a second control slide designed as a perforated plate (15, 16, 17 »10, 31) is the one to set the tank gage both in the Hegler canal as well as in the circulation canal or in the circulation canals is built in » 2. Rolling tank according to claim 1, characterized in that the companion channel and the circulation channel or the UmIaufkanalθ in structural insight Represent a unit within which they are separated from one another by a transverse bulkhead (3) or by Queroohotten are. ; • 109815/0905 Rolling tank according to claim 2, characterized in that g e k e η η, that the inlets and outlets of the regulator channel (4-) and the. Umlaufkanals (6) or the circulation channels lie lower than the liquid level (11,12) in the side tanks (1,2). Rolling tank according to claim 1 / or 2, characterized in that the regulator channel (20) over the circulation channel is arranged and the height goes beyond P the liquid level in the side tanks, so that a free liquid surface is formed in the regulator channel, while the circulation channel (21) is fully submerged remain. 5 · Rolling tank according to claim 1 or 2, characterized in that the control channel and the circulation channel or the control channel and the circulation channels lie next to one another and extend in height above the liquid level in the side tanks, so that the liquid in all liquid channels has a free " Surface forms, 6. Rolling tank according to one of claims 1 to 5 »characterized in that .the length of the circulation channel (23) or the circulation channels is greater than the length of the control channel, so that his or her outlets protrude into the side tank (25; Fig .?) · ^: ■ · ■ Ί 1Q9815 / Q9G5 .- / {: Rolling tank according to one of claims 1, 2, 3 or 6, characterized marked e i c h η e t that the kenm-like, net-like, rust-like or locb plate-like damper flap (8) or the damper slide so constructed not in the fluid channel system, but in the air connection kaiial (13,28) is arranged while the frequency flap in the control channel of the liquid channel system (is built in. 8 ", rolling tank according to claim 7" characterized geke η η - characterized in that the circulation channel or the circulation channels (27) are of the closed type lying below the liquid level and the Hegler channel has the shape of an intermediate tank (35), is the dor between the two inner walls (25) Seitentauks arranged and connected to the side tanks by a respective opening (26), wherein the flow openings through these by a ^frequency: quensreglerklappe (30) or a frequency regulator valve can be controlled (Figure 8a. , b). 9 «rolling tank according to claim δ, characterized in that the intermediate tank used as a Hegler channel is divided in the longitudinal direction of the ship by one or ■ more longitudinal bulkheads, which are also with are each provided with a cross-flow opening, with sum at least in one of these openings a frequency regulator; · lklappe or a frequency regulator slide is arranged. 109815/0905 BATH ORIGINAL 934004 ο Rolling tank according to claim 9, characterized in that the intermediate tank (32) is completely is precipitated with liquid, making its liquid 3 · -. level is higher than the liquid level in the Side tanks. 11 * Rolling tank according to one of the preceding claims, characterized in that the frequency regulator (32) designed as a rotary flap and the damping regulator (31) are mounted on a common axis of rotation in such a way that the two levels, ± i \ dec the Frecjuenzklappe and the DUmpferklappe are, form an angle of essentially 90 ° with each other (Fig. 9) 12, modification of the roll tank according to one of the claims 1 to 10, thereby g e k e η η ζ eiohne't that only the frequency regulator is provided as a Hegel organ and the attenuation regulator is omitted (Figs. 1 and 2). - »· ._ - Ί3. Modification of the device according to one of Claims A ( to 10, characterized in that only the damping regulator is provided as ■ the cone element and,; the frequency controller is omitted ■} i \. Rolling tank according to one of the preceding claims, - 'characterized in that it is together, ί with one or more other, non-adjustable rolling tanks on board a ship or floating body 109815/0905 V BATH ORIGINAL • built-in iat and the regulation of the vectorial ge « overall effect of all tanks together only through the one controllable one. Rolling tank worried 15 'apparatus for optimizing the JETinatellung a Sohlingertanks according to one or more of the preceding claims, characterized in that two _s Blinklainpen are provided _k' of a respective meter, of (a the Hollbewegungen of the vessel ,, the other ienen the movements of the liquid .. ability in the rolling tank is "brought to light up briefly in such characteristic phases of the measured variables, the simultaneous occurrence of which means the EesCnanvstatus." between liquids and ship roll movements. 16- device according to claim 15 _t thereby geke η η <ν · Κ -sei. without that the signals from both measuring instruments actuate a contact counter, deaeen pointer with active; moderate chronological order of the two signals inii continues after a sighting, while when reversing - "' the oil signal sequence has two instruments tion changes. 41. Apparatus according to claim 15 or 16, characterized in that gl ^ '.I ··· -!? ■■ A Ι «ηβϊί iehfii t,' that ataöer of the indication de * ^ 10981570905. '" ÖÄD ORfGlNAL Signal sequence through flashing lamp α and / or contact counter also the current measured values of the instrument that measures the roll movements of the ship in the roll angle, Roll speed or roll accelerometer), to be indicated by a display instrument - 18, anti-rolling tank according to one of the preceding claims, characterized in that the two: te control slide is of a strip-like manner (15%) of comb-like (16) or perforated plate-like (17) * 10 9 8 15/0905 Blank page