JPS62116388A - Driving of cargo pump - Google Patents

Abstract

PURPOSE:To avoid the need of the long installation space for engine room by connecting a Diesel engine for driving cargo pumps through a bevel gear type speed increasing gear with a partial vertical type cargo pump, in a large- sized tanker. CONSTITUTION:A plurality of vertical type cargo pumps 7 are installed into the lowermost part of a pump chamber 2 on the front side of an engine room 1, and a Diesel engine 9 is installed onto a middle deck 4. A power transmission shaft 8 for the power supplied from the vertical type pump 7 is connected with a power transmission shaft 10 extended through a clutch 11 having an elastic joint from the Diesel engine 9, through a bevel gear type speed increasing gear 12. Further, a dynamo 13 is installed in the rear part of the Diesel engine 9, and used for heating a tank through switching, except in loading work. Further, the cargo pumps other than the vertical type cargo pump 7 connected with the engine 9 are driven by a steam turbine. Therefore, the need of the installation space which is long in the direction from the bot to the stern is avoided, and the cargo pumps can be driven efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for driving a cargo pump for a large tanker.

[Conventional technology] Conventionally, large tankers are equipped with 3 to 5 horizontal cargo pumps in the pump room located in front of the engine room.The cargo pump drive device uses a steam turbine, and the horizontal cargo pump and the bow and stern are equipped with a steam turbine. They are connected linearly in the direction.

On the other hand, small ships often use diesel engines, which are more efficient than steam turbines. This is because the output difference between the main engine and the cargo pump is small, so the cargo pump can be driven by the main engine, eliminating the need for a dedicated cargo pump drive device. This is because steam turbines, which require large boilers that take up a large amount of space, are not often used because even if they are connected, the engine room does not have to be extended to take up the space for the cargo pump drive that is no longer needed. In the case of large ships without diesel engines, the main engine cannot be driven due to the large output difference between the main engine and the cargo pump, and a dedicated cargo pump drive device is required.If the diesel engine is driven, it must be connected to the cargo pump in a straight line. However, there are drawbacks such as the installation space becomes longer in the bow and stern direction of the engine room, which means extending the engine room, and the cost of materials such as steel is high. Therefore, a steam turbine is adopted as the cargo pump drive device. ing.

[Problems to be solved by the invention] The steam turbine for driving the cargo pump of a large tanker is
The efficiency was only about one-fourth that of a diesel engine, and fuel consumption was high, making it uneconomical. However, if a diesel engine is used as a dedicated cargo pump drive device, the diesel engine for driving the cargo pump and the horizontal cargo pump must be connected in a straight line, so the cargo pump must be installed at the bottom of the pump room. On the other hand, the diesel engine for driving the cargo pump must be installed at the bottom of the engine room located in front of the main engine, and the installation space becomes longer in the stern direction of the engine room, making it necessary to extend the engine room. However, it had disadvantages such as the high cost of materials such as steel.

The present invention solves the above problems, and provides a method for driving a cargo bomb that uses a high-efficiency diesel engine as a cargo pump drive device for a steam turbine and a tank, does not require long installation space in the bow and stern direction, and is efficient. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a large tanker in which a plurality of vertical cargo pumps are installed at the lowest part of the pump room located in front of the engine room. A part of the cargo pump is driven by a steam turbine, and a diesel engine is installed on the middle deck in front of the engine room for the cargo pump other than the steam turbine driven cargo pump, and the power transmission shaft of the cargo pump driven by the diesel engine and the diesel engine are installed on the middle deck in front of the engine room. The parts where the engine's power transmission shafts intersect perpendicularly are connected by a bevel gear speed increaser, and it is configured to be driven by a diesel engine.

[Function] According to the above configuration, a diesel engine is partially adopted as the drive device of the vertical cargo pump, and the power transmission shaft of the vertical cargo pump and the power transmission shaft of the diesel engine for driving the vertical cargo pump are connected. By connecting the orthogonal parts with a bevel gear speed increaser, a highly efficient diesel engine can be installed as a cargo pump drive device without taking up too much space in the bow and stern direction of the engine room.

[Example] Embodiments according to the present invention will be described with reference to the drawings.

As shown in Fig. 1, a vertical cargo pump 7 is located at the bottom of the pump room 2 located at the front of the engine room 1 of a large tanker.
A power transmission shaft 8 is installed above the vertical cargo pump 7 on which a diesel engine 9 for driving the vertical cargo pump 7 is installed on the engine room middle deck 4 in the engine room 1. On the other hand, a power transmission shaft 10 from the diesel engine 9 is extended horizontally via a clutch 11 with an elastic joint, and the part where the power transmission shafts 8 and 10 intersect at right angles is horizontally connected to the front partition wall 3 of the engine room. They are connected by a bevel gear speed increasing device 12 fixed to the section.

A generator 13 is provided at the rear of the diesel engine 9,
The generator 13 is switched on and used for tank heating at times other than cargo handling. The cargo pumps other than the vertical cargo pump 7 connected to the diesel engine 9 are driven by a steam turbine.

[Effects of the Invention] According to the present invention, a diesel engine for driving the cargo pump is connected to a partially vertical cargo bomb via a bevel gear speed increaser, so that the installation space is not taken up long in the bow and stern direction of the engine room. First, a highly efficient diesel engine can be installed as a cargo pump drive device without extending the engine room, there is no need to spend a lot of material costs such as steel, and fuel consumption is significantly reduced, reducing fuel costs. You can save and furthermore,
The auxiliary boiler and condensation system equipment can be downsized,
By allowing the diesel engine to drive the cargo pump to also drive the generator, there are benefits such as eliminating the need for a dedicated diesel engine to drive the generator.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment according to the present invention.

Claims (1)

[Claims] In a large tanker in which a plurality of vertical cargo pumps are installed at the lowest part of the pump room located in front of the engine room, some of the cargo pumps are driven by a steam turbine, and the cargo pumps other than those driven by the steam turbine are A diesel engine is installed on the middle deck on the front side of the engine room, and the part where the power transmission shaft of the cargo pump driven by the diesel engine and the power transmission shaft of the diesel engine intersect at right angles is connected by a bevel gear speed increaser, so that the diesel engine can also be driven. A cargo pump driving method characterized by: