DE19731412C1 - Drive for sea skimming marine vessel - Google Patents

Abstract

The drive has a drive shaft (20) which is extendible and carries a propeller at its end (14). There is a normal position, in which the propeller is mounted below the hull (11) and an emergency position , in which the propeller is extended beyond the rear transom line of the vessel. The shaft is extendible axially. The extendible shaft can have a movable section (21) to which the shaft can be mounted and a fixed inner section (22).

Description

The invention relates to a drive arrangement for a surface vehicle according to the preamble of claim 1.

The propeller of the drive assembly, also known as a screw propeller or Propeller is called, creates a backward rotation when it is turned directed water jet, according to the recoil principle of a thrust corresponds to the front. This creates pressure swans induced by the propeller kungen in the water. These propeller-induced impulses meet that of plates fields existing rear of the surface vehicle. This works like a sound body and generates structure-borne noise, which radiates into the water and as a so-called named water sound through the high speed of sound in the water and the stratifications in water caused by temperature and salinity is audible and locatable. Acoustic location systems reacting to water noise are, for example, naval weapons used in the navy, such as stationary or towed SONAR systems, or acoustic mine detonators. In particular Naval ships are endangered surface vehicles.

From US 2 856 883, DE-PS 10 92 803 and US 5 549 493 is an An Drive arrangement for a surface vehicle with a rear and a drive motor known. The drive arrangement consists of a drive shaft on which a propeller is arranged at one end. The aforementioned publications relate Surface vehicles that are not at risk from sea warfare agents. U.S. 2,856,883 relates to a drive arrangement in which the propeller based on the plan view of the surface vehicle is arranged below the stern. Furthermore, the propeller with its drive shaft pivotable in a vertical plane. DE-PS 10 92 803 shows a special drive arrangement for amphibious vehicles. With this vehicle the propeller can be moved lengthways. In the waterway station is the propeller based on the top view of the vehicle behind the Ab end of the rear edge line arranged. In US 5 549 493 the Pro peller based on the top view of the surface vehicle also behind the Completion of the rear edge line arranged. In addition, the propeller including the drive shaft pivotally supported.  

Generic drive arrangements for a surface vehicle are from the Technical book "Hydromechanics for ship design" by Prof. Schneekluth (Koehlers Verlagsgesellschaft mbH, Herford, 2nd ed. 1977, pp. 562-571). There points the drive shaft has a fixed length. The propeller is based on the Top view of the surface vehicle arranged below the stern. Through the Positioning the propeller below the tail is also a maneuvering in the Narrow water space possible on so-called area trips, such as in Ports, locks, canals, rivers and roads.  

Due to the fixed arrangement of the propeller at a short distance from the stern of the surface vehicle are the pressure induced by the propeller fluctuations on the outer skin of the tail, which the Plat there to stimulate resonance vibrations, creating a far audible and local water noise is generated. This has a tactical impact on that Surface vehicle disadvantageous.

The object of the invention is to provide a drive arrangement at the beginning mentioned type in such a way that while maintaining a good maneuver Aviability on territorial journeys the location of the excess water due to waterborne noise watercraft on the high seas is difficult.

The object is achieved by the characterizing features of the Claim 1 solved.

The advantages of the invention are that in the normal position an uneinge restricts good maneuvering in narrow water areas is possible on territorial trips. Due to the extensibility of the drive shaft, the propeller is aft can be moved to the protective position. This creates a wide distance to the like Sound body acting rear of the surface vehicle achieved. The propeller Reduced pressure fluctuations now hit with a significantly reduced Impulse on the plate fields of the rear. This leads to a significantly reduced Waterborne noise and difficult location due to sea warfare agents.

Advantageous refinements of the ending specify subclaims 2 to 7.

An embodiment of the invention is described below with reference to the attached drawings described in more detail. Show:

FIG. 1 is a schematic drawing of an endangered by Seekampfmittel Überwas serfahrzeuges in which the bug is not located with;

Figure 2 shows the stern of the surface vehicle shown in Figure 1 in an enlarged Dar position, the propeller being arranged in a normal position below the stern;

Fig. 3 shows the stern of the surface vehicle shown in Figure 1 in an enlarged Dar position, the propeller being arranged in a protective position behind the edge line forming the tail;

FIG. 4 is an enlarged side view of the drive arrangement according to FIG. 1 with a section through the guide rail;

FIG. 5 is drawn in FIG. 1, fixedly mounted hydraulic cylinder for extension of the drive shaft, in an enlarged representation.

Fig. 1 shows an endangered by Seekampfmittel surface vessel 10 with egg nem consisting of plate 13 fields stern 11, a rudder 16, a propeller 14, a drive motor 15 and a drive shaft 20.

The drive shaft 20 is extendable in such a way that the ordered propeller 14 starts at one end

• a normal position, in which the propeller 14 is arranged below the stern 11 in relation to the top view of the surface vehicle 10 ,
• - up to a protective position, in which the propeller 14 is arranged in relation to the plan view of the surface vehicle 10 behind the edge line 12 forming the end of the stern,

aft in the axial direction of the extendable drive shaft

20th

is movable.  

The aforementioned, the end of the tail forming edge line 12 represents that line on the rear outer wall, which is adjacent to the Wasseroberflä surface. An arrow (p) shows the direction of travel aft.

Fig. 2 shows the aforementioned normal position. In this position, the above-water vehicle 10 is easy to maneuver in narrow water areas on territorial trips.

Fig. 3 shows the aforementioned protective position. The protective position with the propeller 14 moved to the rear makes it difficult for the enemy to locate waterborne noise on the high seas. In the protective position, the propeller-induced pressure fluctuations hit the plate fields 13 of the tail 11 with a significantly reduced pulse. This leads to a considerably reduced water noise and thus makes it more difficult to locate it through enemy naval weapons.

In order to extend the drive shaft 20 , this comprises an extendable drive shaft part 21 on which the propeller 14 is mounted and a fixedly mounted on drive shaft part 22 which is arranged adjacent to the drive motor 15 . The extendable drive shaft part 21 and the stationary drive shaft part 22 are telescopically connected.

In order to achieve greater lengths, the extendable drive shaft 20 can also include more than two telescopically connected drive shaft parts in deviation from the graphical representation.

For torque transmission, the telescopically connected drive shaft parts 21 and 22 form-locking elements 24 . For example, hexagonal profile connections, as shown in FIG. 5, or multi-spline or polygon profile connections are suitable as form-locking elements.

In a departure from the illustrated embodiment, a gearbox, a clutch, a shaft brake or similar, not shown, components can be connected between the fixedly mounted drive shaft part 22 and the drive motor 15 shown in FIG. 1.

Referring to the storage of the extendable drive shaft 20, Figs. 2 and FIG. 3 is a localized shaft bearing block 17 and a slidable shaft bearing block 30th

The displaceable shaft bracket 30 is arranged on the extendable drive shaft part 21 . Furthermore, the displaceable shaft bearing block is fixed in the axial direction of the extendable drive shaft part 21 and can be displaced synchronously with the extendable drive shaft part 21 along a guide rail 40 arranged at the rear 11 of the surface vehicle 10 .

The displaceable shaft bracket 30 serves to adequately store the extendable Antriebswel le 20 in the protective position.

The displaceable shaft bearing bracket 30 is fixed in the axial direction of the drive shaft part 21 which can be extended aft via a fixing ring 31 which is rigidly connected to the extendable drive shaft part 21 .

Fig. 4 shows a side view of the drive arrangement. In this view, the guide rail 40 along which the displaceable shaft bearing bracket 30 is guided is drawn in section.

The guide rails 40 are formed with commercially available, water-lubricated plastic sliding surfaces. This prevents tilting of the ver sliding shaft bracket 30 in the guide rail 40th

Fig. 5 shows the fixed-position hydraulic cylinder 50 shown in Fig. 1 in an enlarged view, with which the extension of the aft extendable drive shaft part 21 takes place. For this purpose, a coupling piece 52 attached to the piston rod 51 of the hydraulic cylinder 50 engages in a driving flange 23 of the extendable drive shaft part 21 .

To minimize the frictional resistance in the transmission of the axial hydraulic cylinder force to the rotating, extendable drive shaft part 21 , the coupling piece 52 is provided with sliding surfaces.

Reference list

pAir travel direction

10th

Surface vehicle

11

Rear

12th

Edge line

13

Slab fields

14

propeller

15

Drive motor

16

Rudder

17th

fixed shaft bearing block

20th

drive shaft

21

extendable drive shaft part

22

stationary drive shaft part

23

Driving flange

24th

Positive locking elements

30th

sliding shaft bearing block

31

Fixing ring

40

Guide rail

41

Sliding surfaces

50

Hydraulic cylinder

51

Piston rod

52

Coupling piece

Claims (7)

1. Drive arrangement for a marine weapon endangered above water vehicle with a rear and a drive motor, consisting of a drive shaft to, on which a propeller is arranged at one end, characterized in that the drive shaft ( 20 ) is extendable, such that the one end to ordered propellers ( 14 ) starting from

• 1. a normal position, in which the propeller ( 14 ) is arranged below the stern ( 11 ) in relation to the plan view of the surface vehicle ( 10 ),
• 2. up to a protective position in which the propeller ( 14 ) is arranged behind the edge line ( 12 ) forming the end of the stern, based on the top view of the surface vehicle ( 10 ),

can be moved aft in the axial direction of the drive shaft ( 20 ). 2. Drive arrangement according to claim 1, characterized in

• 1. that the extendable drive shaft ( 20 ) comprises an extendable drive shaft part ( 21 ) on which the propeller ( 14 ) is held, and a stationary drive shaft part ( 22 ) adjacent to the drive motor ( 15 ), and
• 2. that the extendable drive shaft part ( 21 ) and the stationary on drive shaft part ( 22 ) are telescopically connected.

3. Drive arrangement according to claim 2, characterized in that the telescopically connected drive shaft parts ( 21 , 22 ) have positive locking elements ( 24 ) for torque transmission. 4. Drive arrangement according to claim 2 or 3, characterized in that on the extendable drive shaft part ( 21 ) a shaft bearing block ( 30 ) is arranged, which

• 1. is fixed in the axial direction of the extendable drive shaft part ( 21 ) and
• 2. along a at the rear ( 11 ) of the surface vehicle ( 10 ) arranged guide rail ( 40 ) in synchronism with the extendable drive shaft part ( 21 ) is displaceable.

5. Drive arrangement according to claim 4, characterized in that the fixing of the displaceable shaft bearing block ( 30 ) in the axial direction of the extendable drive shaft part ( 21 ) via a fixing ring ( 31 ). 6. Drive arrangement according to claim 4 or 5, characterized in that the guide rail ( 40 ) is formed with plastic sliding surfaces ( 41 ). 7. Drive arrangement according to one of claims 2 to 6, characterized in that the extension of the extendable drive shaft part ( 21 ) by a hy draulic cylinder (SO), on the piston rod ( 51 ), a coupling piece ( 52 ) is attached, which in a driving flange ( 23 ) of the extendable drive shaft part ( 21 ) engages.