DE1964348B2 - DEVICE FOR DAMPING VIBRATION MOVEMENTS, IN PARTICULAR OF SINGING AND / PAMPING MOVEMENTS OF WATER VEHICLES WITH THE HELP OF TANK STABILIZATION SYSTEMS - Google Patents

Description

Tabel

35

The invention relates to a device for damping vibratory movements, in particular of Lurching and pitching movements of watercraft, with the help of tank stabilization equipment, Jie with a liquid, its specific gravity is considerably higher than that of the water due to additives, work as tank content.

A known device of the type described above Art allows regardless of whether the Frahm stabilization system with a U-shaped tank cross-section or as an overflow tank according to M r M ti 11 e η works, reducing the Tank dimensions, so a space saving, however, the toughness of the tank content must be Particular attention should be paid to liquid. This happens with the one described above Stabilization system through chemical additives and substances that are introduced into the tank contents, to reduce the viscosity of the liquid. This way you can increase the toughness of the once used But only in one direction, d. H. only with the effect of a further reduction in toughness, to be changed. This makes it possible to adapt the stabilization system to the respective Relationship very limited.

The invention is based on the object of improving and facilitating this possibility of adaptation.

In the case of a diesel oil with blown asphalt. Emulsifiers. Lead compounds and chemical additives the task falls to the emulsifiers. the

Speci Apparent viscosity cP) - centipoise 80 C foresight
middle solution fish at temperature 50 No. weight 40 C 60 C 65 BaSO ₁ (t / m ¹ ) 20C 125 84 44 BaSO ₁ 1 2.0 250 185 95 PbS II 2.0 300 118 65 IN THE 3.1 250

• to for comparison water 1 (cP)

The above shows that for the To influence the viscosity of the liquid forming the tank contents, special devices are required are.

According to the invention, these consist in that for the Liquid a heating and or cooling device is provided. the one at the stabilization tank or tanks connected circulating heat exchange device is formed.

By the fact that by the Wärmeaust.iuschgerät A part of the tank's contents can constantly flow or be pumped through is an ongoing influencing factor the viscosity of the tank contents in both directions possible, so that the system the respective Conditions regarding temperature, size of the vibration impulses and the ship's stability are easy and is quickly adaptable.

In terms of performance, the heater should be able to heat ^{the tank contents to around 80 D C.}

In a further embodiment of the invention, the walls of the stabilization tank and the liquid leading lines must be insulated. This isolation should initially in accordance with the explanations above protect against heat transmission. The insulation can also affect the corrosion protection of the tank walls compared to those of the liquid

extended additives. Any of these types of insulation can be designed and arranged on its own. In addition, it can be isolated against noise transmission may be required depending on the viscosity of the liquid.

The cross-sections of the liquid carrying the liquid are also corresponding to the viscosity of the liquid To dimension lines, namely the cross-sections should also increase with increasing toughness.

Claims (5)

Patent claims: 1. Device for damping vibratory movements, in particular from Schünger and / or Pitching movements of watercraft, with the help of tank stabilization systems that are equipped with a Liquid, the specific weight of which is considerably higher than that of water due to additives, work as tank contents, characterized that a heating and / or cooling device is provided for the liquid. as a circulating heat exchange device connected to the stabilization tank or tanks is trained. 2. Apparatus according to claim 1, characterized in that the heating device is designed is that the tank contents can be heated to about 80 "C. 3. Apparatus according to claim 1 or 2, characterized in that the walls of the stabilization tanks and the lines carrying the liquid are isolated. 4. Device according to claims 1 to 3, characterized ..-, nzeich that the cross sections of the the lines passing through the fluid also increase with the viscosity. 5. Device according to claims 1 to 4, characterized in that the liquid from Diesel oil with blown asphalt, emulsifiers. Lead compounds and chemical additives consists. To keep the substance liquid over a long period of time. The lead compounds change the other properties the liquid does not, and the chemical additives ensure that long molecular chains are formed (Saponification) a gel structure is built up, which the solid weighting substances even with a long time If the liquid is standing still, it prevents it from sinking. The viscosity of the liquid used as the tank content, in particular a diesel oil of the type described above Art, can have a considerable, but not predictable, influence on the roll damping of a tank, especially if there are major differences between the viscosities of the liquid and the water normally used. One is therefore too precise in this regard to predict relies on corresponding model experiments taking into account the Reynolds number. As the table below shows, the viscosity is strongly dependent on the temperature and increases Room temperature is so high that it may be necessary to heat the roll tank will. However, it is possible to adjust the viscosity of the liquid so that even at 5 to 10 ° C sea temperature the tank liquid does not become too viscous for a rolling tank. But then you have to Be sure that the tank liquid does not move Heated beyond a certain limit, because otherwise the weighting material would settle.