DD300701A7 - ARRANGEMENT FOR BASIC DISTANCE CONTROL WITH TEMPERED UNDERWATER DRIVE BOOM - Google Patents

Abstract

The invention relates to an arrangement for pitch control with trimmed Unterwasserauftriebsboje for mine clearance equipment. The aim of the invention is to increase the Räumeffektivität. The object of the invention is to provide an arrangement for basic distance control with trimmed Unterwasserauftriebsboje, which ensures a constant basic distance and high drag stability at all towing speeds a constant footing. This is achieved in that at the rear of a trim weight and the center of buoyancy on both sides, the Bojenspann the dragon chain receiving trunnions are arranged with buoyancy surfaces mounted above. The front dragon boxes have V-shaped, the rear outwardly inclined stabilizing sheets and openwork runners and weights at the end.

Description

For this 1 page drawings

Field of application of the invention

The invention relates to an arrangement for basic distance control with trimmed Unterwasserauftriebsboje preferably for mine clearance for mine clearance in shallow waters.

Characteristic of the known technical solutions

DE OS 2 224 871 describes a control device for a body towed in the water.

Compliance with a given distance to the seabed is achieved by an installed distance measuring device with coupled depth control.

The towed body is rotatable on the towline about its pitch axis, fixed hydrodynamically stable.

A disadvantage is the high technical complexity and the susceptibility to interference due to the large number of components used. The operation and maintenance requires highly qualified personnel; This results in high operating costs.

In DD-GP B 63 G / 149 743, a device consisting of a hydrostatic buoyancy agent combined with basic weights is proposed for the basic distance control.

The disadvantage is that this device is only suitable for very low towing speeds.

At higher towing speeds, the base weights are lifted as a result of their hydrodynamic resistance increasing quadratically with the velocity and thus losing their control function.

From consultations with the USSR is known a PKT II for the basic distance control, in which a hydrostatic acting Unterwassertrageboje constant buoyancy with its head attached to a towline and at this attachment point a movable dragon chain is struck with arranged in the dragon boxes hydrodynamic profile surfaces.

As a result of the constant hydrostatic buoyancy of the underwater carrying buoy, due to the increasing hydrodynamic output of the kite string, a different basic distance of the clearing line is obtained for each towing speed and an impermissible ground contact at high towing speeds. For this reason, this basic distance control device can only be used in a small speed range near the design speed. At higher speeds, the dragon chain lifts off and shears sideways.

Object of the invention

The aim of the invention is to increase the Räumeffektivität.

Essence of the invention

The invention has for its object to provide an arrangement for basic distance control with trimmed Unterwasserauftriebsboje that ensures a constant basic distance and a high running stability even at high towing speeds at all towing speeds.

According to the invention this is achieved in that the Unterwasoertrageboje at the rear of a trim weight and the center of lift on both sides of pivot with arranged above arranged buoyancy surfaces, the known dragon chain is fixed with a buoy tension on the pivot of Unterwasserauftriebsboje. At the rear known stabilizing surfaces are arranged.

The individual kite boxes are equipped with stabilization surfaces. The front dragon boxes carry V-shaped, the rear outwardly inclined trained stabilization Blecha on the upper part and have laterally open skids on. In the end, weights are appropriate.

The underwater buoy attached to a clearing line is compensated by the trim face so that in the static state it floats almost horizontally in the water.

The hydrodynamic lift surfaces are set in size and angle of attack so that the hydrodynamic Drive forces of the dragon chain are compensated. The hydrodynamic lift surfaces are arranged so that the line of action of the resulting hydrodynamic force

through the axis of rotation leads.

After exposure, the weight forces and the hydrostatic buoyancy forces are independent of the speed Balance. With increasing speed, the hydrodynamic buoyancy force on the driving surfaces of the Underwater buoy buoy and equally the hydrodynamic forces of the dragon chain square with the Speed. Thus, a balance between the resulting buoyancy and output forces is constantly adjusted. embodiment

The invention will be explained in more detail using an exemplary embodiment

 In dt r associated drawing show

Fig. 1: the side view of the arrangement according to the invention Fig. 2: a dragon box.

The Unterwasserauftriebsboje 1 has in the front part of a tow 2 on which the clearing line 3 is posted. At the stern are one Trim weight 4 and stabilizing surfaces 5 arranged. In the center of buoyancy of the Unterwassertrageboje 1 are on both sides of pivot 6 and above hired lifting surfaces. 7

appropriate. At the pivot 6 is composed of individual dragon boxes 8 dragon chain 5 with a

Bojenspann 10 attached. In the dragon boxes 8 profile surfaces 11 are installed. The dragon boxes 8 have the top outward

inclined or V-shaped stabilizing plates 12 and slide on skids 13 having the recesses 14. In the end are

Weights attached. The front dragon boxes are with V-shaped and the rear with angled outward stabilizing plates

equipped.

The Unterwasserauftriebsboje 1 is balanced in the static state in the water with the help of trim weight 4 so that they

under load in the towed eye 2 by the weight of the clearing line section to be carried including the associated

Gripper and under load of the pivot pin 6 by the weight of the bearing portion of the kite chain 9 approximately

floating horizontally.

The hydrodynamic lift surfaces 7 are sized in size and angle of attack so that the hydrodynamic Downforce forces of the dragon chain 9 are compensated for a given number of lying on the ground dragon boxes 8. The position of the hydrodynamic lifting surfaces 7 is set so that the Wirkungsiinie the resulting force through the Rotary axis of the pivot β leads. As a result, no moment acts on the buoy. The angle of attack of the hydrodynamic Buoyancy surfaces is maintained, so that at all speeds always the same basic distance is maintained. During towing grow with increasing speed, the hydrodynamic buoyancy forces on the lifting surfaces. 7

and likewise the hydrodynamic output forces of the kite chain 9 square with the speed.

This is always a balance between the resulting buoyancy and output forces given. In upward disturbing forces increases the buoyancy, so that more dragon boxes 8 lift off, but in turn

generate a larger output force by the additionally impinged professional areas 11 and thus again a

Establish equilibrium state. To ensure a smooth and stable run of the dragon chain, the outwardly inclined or V-shaped Stabilizing sheets 12 attached, the runners 13 provided with recesses 14 and arranged weights at the end. Documents considered:

US 384 277 6, F 42 B 19/04; DE 228 487 1, B 63 G 8/24;

Claims (2)

1. Arrangement for the basic distance control with trimmed underwater buoy with stabilizing surfaces at the stern and attached dragon chain, characterized gekonnzeichnet that at the rear of a trim weight (4), in the buoyancy center in a conventional manner on both sides, the buoy tensioner (10) of the dragon chain (9) holding trunnions ( 6) are arranged with the lifting surfaces (7) mounted above, the front dragon boxes (8) V-shaped and the rear outwardly inclined stabilizing plates (12) and open ended runners (13). 2. Arrangement for basic distance control with trimmed underwater buoy according to item 1, characterized in that the line of action of the resulting hydrodynamic force through the axis of rotation of the pivot pin (6) leads.