FI122136B - water Transportation - Google Patents

Abstract

The invention relates to a marine vessel with at least a first cargo facility at a stern end and at least a second cargo facility at a bow end, and having a deckhouse arranged between the first cargo facility and the second cargo facility. In order to provide for cost-effective propulsion and cargo transport in combination, the propulsion system comprises a first propulsion unit and a second propulsion unit forming a CRP propulsion system. The machinery of the first propulsion unit and the machinery of the second propulsion unit are located on top of each other under the deckhouse.

Description

MARINE VESSEL

CRAFT

VATTENFARKOST

The present invention relates to a craft according to the preamble of claim 1, having at least a first cargo space at the rear end of the craft and at least a second cargo space at the bow end of the craft, wherein the craft has a deck structure between the first cargo space and the second cargo space.

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In the following, the terms "" aft "," "rear", "" front "," "front" and the like shall be understood to mean the rear of the craft and the front of the craft in the case of the bow of a craft.

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Of course, in the case of water-borne cargo vehicles, cargo transport capacity is a very important factor. Operating costs, especially for power generation, are another important factor. Modern high-speed cargo ships require a large amount of propulsion power, but the loads on the propeller blades 20 often become critical with one propeller. Generally, a single propeller with the largest possible diameter is desirable for high propulsion efficiency. However, the draft may become a limiting factor.

It is an object of the present invention to avoid the drawbacks associated with known solutions and to provide a cargo carrying water vehicle that maximizes cargo carrying capacity and provides an efficient and redundant way to utilize the power of the craft. This object is achieved by the watercraft according to claim 1c.

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[g 30] The basic idea of the invention is to use a propulsion system which has improved hydrodynamic properties of one of the propellers while maintaining

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cargo capacity, which remains approximately the same as in a single propeller machine arrangement. This is accomplished by means of the first propulsion unit and the second propulsion unit constituting the CRP (Contra Rotating Propeller) propulsion system, and arranging the machinery of both propulsion units superimposed in the same compact space below the craft deck 5 of the craft.

The CRP propulsion system is efficient and fuel efficient compared to conventional systems and produces more power by distributing power between the rotating propellers of the CRP propulsion system. When using the CRP-10 propulsion system, the most efficient hull form can be used, which comprises a single so-called propulsion system. keel. Additionally, the CRP propulsion system provides redundancy.

Arranging the actuators, i.e. the first power unit and the second power unit underneath the deck-15, provides more cargo space. The drives are thus housed in the same compact space, enabling cost-effective and simple installation of wires, cables and accessories. In addition, warehouses, workshops and other technical facilities can be provided in the columnar space below the deck to optimize vehicle space. In addition, 20 accommodation spaces can be limited to the deck area.

Preferably, the first power unit located in the first engine room, the second power unit located in the second engine room, and the deck building overlap the respective decks of the craft.

The first propulsion unit of the CRP propulsion system comprises a first power unit, a first transmission, and a first propeller unit. The first propeller unit constitutes the front propeller of the CRP propulsion system. CRP

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The second propulsion unit of the propulsion system comprises a second power unit, a second power unit and a second propeller unit. The second propeller unit forms the CRP-m propulsion system rear propeller.

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Preferably, the first propulsion unit comprises a conventional mechanical impulse arrangement, wherein the first power unit may be an internal combustion engine, a gas turbine, etc., and the first transmission may comprise a horizontal drive shaft coupled to the first anterior propeller unit. Preferably, the second propulsion unit 5 comprises a mechanical, controllable propeller device, the second transmission comprising a so-called z drive unit connected to the second rear propeller unit.

In this case, it is preferable to arrange the second power unit below the deck building, on top of the first power unit.

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The advantages of the present invention are very significant in relation to a container ship. The compact space arrangement, with the deck building on top of vertically located engine rooms, results in high container loading capacity with standard container dimensions. In addition, the IMO (International Maritime 15 Organization) visibility requirements are met with the aforementioned high container loading capacity.

This means that the CRP propulsion system can be operated without losing cargo capacity.

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The present invention will now be described in more detail by way of example only, with reference to the accompanying schematic drawing showing a preferred embodiment of the present invention.

25 shows a watercraft 1, a container ship in this embodiment.

o Watercraft 1 has a stern marked 2 and a bow marked 3. The water vehicle 1 is provided with at least a first cargo space 4 ir at the rear end 2 and at least a second cargo space 5 at the front end 3 of the water vehicle.

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The cargo compartment 4 is shown to comprise at least one tailgate 41, in this case three tailgates, for receiving containers 10. The second cargo space 5 has only one front cargo space 51 for receiving containers 10. It is clear,

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that the bow end 3 of the craft 1 may have more cargo holds. A deck structure 6 is provided between the first cargo compartment 4 and the second cargo compartment 5, in this embodiment the foremost rear cargo compartment 41 and the rearmost cargo compartment 51. The water vehicle is further provided with a propulsion system.

The propulsion system comprises a first propulsion unit 8 having a first power unit 81 and a second propulsion unit 9 having a second power unit 91, the propulsion units forming a CRP (Contra Rotating Propeller) propulsion system 7. CRP propulsion systems are known per se, or known to those skilled in the art. therefore, describe in more detail in this summary.

The first propulsion unit 8 comprises a conventional mechanical propulsion unit having a first power unit 81, such as an internal combustion engine, gas turbine, etc., which rotates the first forward propeller unit 84 by means of a first transmission comprising a generally horizontally arranged main shaft 83. The second propulsion unit 9 comprises a mechanical, controllable propeller device having a second power unit 91 which rotates the second propulsion unit 98 by a second transmission 92 (generating z drive) comprising a generally horizontally arranged first drive shaft 93, a first angular gear 94, 20 a drive shaft 95, a second angular gear 96, and a generally horizontally arranged propeller shaft 97 coupled to a second propeller unit 98. In this CRP propulsion system 7, the first propeller unit 84 and the second propeller unit 98 are located relatively close to each other; The propeller shaft 97 rotating the 25 ropes 98 are parallel and aligned with one another.

Thus, also the main shaft 83 connected to the first propeller unit 84 and the first drive shaft 93 of the second propulsion unit 9 are arranged on different decks parallel to the rear end 2 of the craft 1.

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[£ 30] The following describes the machinery and space arrangement of the first propulsion unit 8 and the second propulsion unit 9.

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In a watercraft 1, such as a container ship, the deckhouse 6 is usually located in the stern of the ship with respect to its length. In the drawing, the deck building 6, which preferably includes accommodation space, etc., extends above the loaded containers 10 to form a bridge from which, according to the above, there is visibility according to the prevailing numbers. Below the deck building 6, on top of the first engine room 85 having a first power unit 81 using a conventional mechanical propulsion unit, is a second engine room 99 having a second power unit 91 using a mechanical controlled propeller unit. The deck building 6, the second engine room 99 and the first engine room 85 in practice, provide a vertical pillar forming an operating area between the cargo compartments which neither obstructs nor restricts the cargo spaces of the craft 1.

In addition, cabling, wiring and arrangements for additional supply can be implemented and designed in a cost-effective and simple manner within this compact operating range. In addition, warehouses, workshops and other technical facilities can be reasonably located in an area with direct access to the associated equipment.

This achieves the most efficient transport concept in the CRP propulsion system.

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The drawing and the description related thereto are only intended to illustrate the basic idea of the invention. The invention may vary in detail within the scope of the following claims.

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Claims (5)

A watercraft with at least one first cargo space (4) at the rear end of the watercraft (2) and at least a second cargo space (5) at the front end (3) of the watercraft 5, and in which a watercraft (1) is arranged a tire housing (6) between the first the cargo compartment (4) and the second cargo compartment (5), and which water craft (1) is provided with a propulsion system comprising a first propulsion unit (8) and a second propulsion unit (9) forming a CRP propulsion system (7), characterized in that the machinery of the first propulsion unit (8) comprising a first power unit (81) and the machinery of the second propulsion unit (9) comprising a second power unit (91) are arranged on each other in the same compact column-shaped space below the tire housing (6). Watercraft according to claim 1, characterized in that the first power unit (81), the second power unit (91) and the tire housing (6) lie on each other on the respective deck of the watercraft (1), and that the first power unit (81 ) is located in a first engine room (85) and the second power unit (91) is placed in a second engine room (99). Watercraft according to claim 1, characterized in that the first propulsion unit (8) of the CRP propulsion system (7) comprises a first power unit (81), a first power transmission (82) and a first propeller unit (84) and that the CRP propulsion system (7) ) second propulsion unit (9) comprises a second power unit (91), a second power transmission (92) and a second δ 2 propeller unit (98). CD and g 25 Watercraft according to claim 3, characterized in that the first propulsion unit (8) comprises a conventional mechanical propulsion unit and that the second propulsion unit (9) comprises a controllable propeller device and that (M § the second power unit (91) is located below the tire housing (6), on the first mo power unit (81) o (M Watercraft according to claim 1, characterized in that the watercraft (1) is a container ship and that the first cargo space (4) comprises at least one rear cargo space (41) for receiving containers (10) and that the second cargo space (5) comprises a front cargo compartment (51) for receiving containers (10). δ (M CD O σ> o X cn CL {M O in in o o {M