JPS63159194A - Drive element for water vehicle, particularly, ship - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The invention relates to a drive element for a water vehicle, in particular a boat, which is fixed on a drive shaft protruding from the hull and oriented at a specific angle with respect to the drive shaft. and a propulsion screw associated with said drive element which is surrounded by a cylinder jacket.

BACKGROUND OF THE INVENTION Known propulsion screw arrangements without cylinder jackets have the disadvantage that the excessive force of the vortex flow by the propulsion screw is lost due to the expanding effect of the flow.

To overcome this drawback, it has been proposed to surround the propulsion screw by a cylinder jacket.

Admittedly, the water internal friction at the jacket is relatively high, but a significantly better arrangement is obtained than in the case of a ship propulsion screw without a jacket.

OBJECT OF THE INVENTION The present invention provides a drive element for a water vehicle of the type mentioned in the opening, in particular a ship, in which the water flow or amount is directed from the beginning, i.e. before the area of the propulsion screw, in the direction of the drive shaft and the propulsion screw. The task is to create a system in which the water flow is forced to flow to the propulsion screw, and the water is thus moved from the outside to the inside and without significant energy loss.

SUMMARY OF THE INVENTION It is an object of the invention that the blades are arranged helically with an at least partially curved course up to the propulsion screw and reach the inside of the cylinder jacket, and that the water flow or amount of water reaches the propulsion screw. The screw is fixed to the cylinder jacket in such a way that it is guided forcibly inwardly in the direction of the drive shaft and the propulsion screw in the direction of the drive engine at a distance from the propulsion screw on the drive shaft. The vanes are arranged helically with an at least partially curved course up to the propulsion screw and reach the inside of the cylinder jacket, and the cylinder jacket is provided with a water flow or a thrust in the region of the propulsion screw and the drive shaft. This is solved by being fixed in such a way that it is forced to be guided inward in the direction of the propulsion screw.

EFFECTS OF THE INVENTION Due to the additional blades extended close to the cylinder jacket by the drive element according to the invention, the water flow or water volume is forced to be guided from the beginning, compared to a conventional propulsion screw, i.e. to the cylinder jacket. As a result, as much energy as possible due to outward drift is not lost.

Other advantageous configurations are described in the implementation section.

According to claim 2, the blade is at least partially conically shaped and has the shape of a hollow parabola, a hollow ellipse or a hollow hyperbola and surrounds the drive shaft helically. According to claim 3, 4
The two blades are fixed centrally and symmetrically spaced from each other on the drive shaft, on the one hand in the hub and on the other hand in the cylinder jacket.

According to claim 4, the blade is fixed to the cylinder jacket with its side edge tangentially abutting along the jacket, and the other side edge extends between the propulsion screws. There is.

According to claim 5, the blade has a curved recess for fixation on the hub on the drive shaft and is rounded in the area of the hub, in which case the blade does not extend or open. The linear body of revolution forms a parabola, an ellipse or a hyperbola. According to claim 6, the width of the cylinder jacket is approximately equal to the distance from the fixed boss of the blade to the end of the cylinder jacket, in which case A+B=L.

According to a further embodiment of the drive element, a turbine screw vane is arranged on the cylinder jacket which can additionally be fitted onto the cylinder jacket and extends outwardly. .

(Example) A preferred example of the drive element according to the present invention will be described based on the drawings.

As is clear from FIGS. 1 to 4, a propulsion screw consisting of four screw blades 3 is fixed by a boss 2 onto a drive shaft 1 protruding from a hull (not shown). The screw vanes 3 are oriented at a certain angle to the drive shaft l in a known manner in order to impart as large a drive torque as possible on the drive shaft.

The screw vane 3 is surrounded by a cylinder jacket 4 of width B and fixed thereto.

The distance from the screw blades is such that in the direction of the drive element, ie in the direction of the arrow F1, four blades 5 with an at least partially curved course are arranged in a helical manner and reach the inside of the cylinder jacket 4. In addition, six bosses 6 are fixed to the drive shaft 1 in an upright manner. The angle α between the drive shaft l and the tangent to the outer surface of the blade is 40
and 50°.

FIG. 2 shows a perspective view of the blade 5. The blade 5 has at least partially the shape of a cone, in particular a hollow parabola, a hollow ellipse or a hollow hyperbola 5 and grips the drive shaft 1 . In particular, the front end is rounded at the boss 6, and the blade has a rounded slit 8 which in the front region transitions into the side surface 9, which projects from the inner wall surface 10 and reaches between the screw vanes 3. There is. The other side 11 is the cylinder jacket 4
runs tangentially along the generatrix of .

In the front region of the boss, the rotation body of the expansion line of the blade 5 corresponds to a parabola, an ellipse or a hyperbola 5. The outer width B corresponds approximately to the distance A from the end of the cylinder jacket to the end of the blade 5.

A modified embodiment of the drive element according to the invention is shown in FIGS. 5 and 6. There, a further cylinder jacket 12 is supported on the cylinder jacket 4, which has a flow-optimizing turbine screw 13 on its outer surface. The arrangement is such that the cylinder jacket 12 extends beyond the cylinder jacket 4 towards the rear in the direction of the propulsion screw.

With the drive element according to the invention, the advantage is achieved that the blades 5 exert a kind of drawing of water from the outside inwards, since the blades have an extension that reaches as far as the generatrix of the cylinder jacket. The propulsion screw 3 carries the water under pressure and pushes it out of the projecting cylinder jacket end. As a result, there is virtually no loss of force due to the expansion action, since the water volume is slid from the beginning up to the screw vanes of the conventional propulsion screw, taking into account the transfer of the water volume to the propulsion screw, resulting in virtually no energy loss. This is because the drive element generates a large propulsive torque at a given engine output.

According to a preferred embodiment of the drive element according to FIGS. 5 and 6, four blades 5 are provided on the inner parabola and eight blades 13 on the cylinder jacket 12.

[Brief explanation of the drawing]

1 is a side view of a drive element according to the invention, FIG. 2 is a perspective view of the blade, FIG. 3 is a front view of the drive element corresponding to the arrow F1 in FIG. 1, and FIG. 4 is an arrow in FIG. FIG. 5 is a side view of a further embodiment of the drive element according to the invention, and FIG. 6 is a front view of the drive element according to FIG. 5. Symbols in the figure 1 ... Drive shaft 3 ... Propulsion screw 4 ... Cylinder jacket 5 ... Blade

Claims (7)

[Claims] (1) A drive element for water vehicles, especially ships, comprising a propulsion screw (3) fixed on a drive shaft protruding from the hull and at a specific angle with respect to the drive shaft, the propulsion screw being outside the cylinder. In said drive element surrounded by a cover (4), in the direction of the drive engine beyond (L), the blades (5) are arranged helically with an at least partially curved course up to the propulsion screw (3). into the cylinder jacket in such a way that the water flow or amount of water is forced inwardly in the direction of the drive shaft (1) and the propulsion screw (3) in the area of the propulsion screw. Said drive element, characterized in that it is fixed. (2) The blade (5) is at least partially conically shaped and at least partially has the shape of a hollow parabola, a hollow ellipse or a hollow hyperbola, and the drive shaft (1) extends in a helical manner. A drive element according to claim 1, enclosing. (3) The four blades are fixed concentrically and symmetrically with respect to the drive shaft (1) on the one hand in the boss (6) and on the other hand in the inner chamber of the cylinder jacket.
or the driving element according to item 2. (4) The blade (5) is fixed to the inner surface of the cylinder jacket (4) with its side edge (11) tangentially abutting along the cylinder jacket generatrix, and the other curved side edge ( Drive element according to any one of claims 1 to 3, which extends between the propulsion screws (3) at 9). (5) The blade (5) is attached to its boss (6) on the drive shaft (1).
) has a curved recess (8) and is circular in the region of the hub (6), the rotating body of the line of rotation of the rotating blade being parabolic, elliptical or circular. 5. Drive element according to claim 1, forming a hyperbola. (6) A patent claim in which the width (B) of the cylinder jacket is approximately equal to the distance (A) from the fixed boss (6) of the blade (5) to the end of the cylinder jacket, and the equation L=A+B holds. The driving element according to any one of the ranges 1 to 5. (7) Additional turbine blades (
13) is arranged, the turbine blades protruding on the back side of the cylinder jacket (4). The drive element according to one.