JPS58174081A - Ventilator for engine room of ship - Google Patents

Abstract

PURPOSE:To efficiently introduce relative airflows generated at the time of steaming into an engine room through a duct, by a method wherein an enlarged opening part widened ahead is provided, a damper for remotely controlling the introduction of air is provided, and a signal from a controller provided in a steering room is used. CONSTITUTION:At an upper part of a bridge 1, an air-introducing part 2 directed ahead and a ventilating duct 4 for introducing air into the engine room 5 are provided. The air-introducing part 2 is provided with the enlarged opening part 3a widened ahead and the damper 7 which receives a controlling signal from the controller provided in the steering room and remotely controls the introduction of air. The outside air introduced into the engine room 5 is discharged through each exhaust port 6 after being circulated in the engine room 5. Accordingly, the relative airflows generated at the time of steaming can be efficiently introduced into the engine room 5 by operating the damper 7.

Description

[Detailed description of the invention] The present invention relates to a device for providing ventilation to an engine room in a ship.

Conventionally, a ventilator driven by an electric motor has been used as an engine room ventilation system for a ship.

The engine room is ventilated by taking in outside air from the air intake in the upper part of the engine room.

However, in such conventional devices.

Since a large number of electrically driven ventilation fans must be installed,
It is necessary to increase the generator output.

The present invention has the drawback of increasing the amount of fuel oil used.
The object of the present invention is to solve these problems, and to provide an inboard engine room ventilation system that efficiently introduces wind from the ship's running into the engine room.

For this reason, (1) the inboard engine room ventilation system of the present invention includes an air introduction section disposed toward the bow in the upper part of the bridge;
The air introduction section is equipped with a ventilation duct that blows air from the air introduction section to the engine room. The main feature is that the system is equipped with a damper that remotely controls the introduction of the system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figures 1 to 4 show an inboard engine room ventilation system as the first embodiment, and Figure 1 is a perspective view showing its overall configuration. , 3 are graphs showing its operation, FIG. 4 is an electrical circuit diagram for its control, and FIG. 5 is a perspective view of a second embodiment of the inboard engine room ventilation system.

As shown in FIG.
This air introduction section 2 is provided with an air intake duct 2a, which serves as a traveling wind introduction section and has a rectangular passage cross section, and is arranged toward the bow direction A. In order to constrict the running wind guided into the intake duct 2a, a tertusser 3, which is an enlarged opening that expands in the bow direction A, is provided between the air intake duct 2a and the ventilation duct 4.

This reducer 3 has an intake port 3 that takes in the running wind.
a is equal to the cross section of the air intake duct 2a, and the exhaust port 3b which sends the running air to the ventilation duct 3 is equal to the cross section of the ventilation duct 4.

Then, the area of the inlet 3a of the reducer 3 and the outlet 3
The ratio to the area of b is approximately 7.

The ventilation duct 4 is for blowing air from the air introduction part 2 to the engine room 5, and each part thereof has a substantially equal cross-sectional area.

An air outlet 4a is provided at the end of the ventilation duct 4.
Air is blown to the engine room 5.

The outside air blown into the engine room 5 circulates within the engine room 5 and then is discharged to the outside from each exhaust port 6.

Further, a damper 7 is interposed between the reducer 3 and the ventilation duct 4, and prevents rainwater from flowing into the engine room 5 by restricting the ventilation during stormy weather such as a typhoon. There is.

Figures 2 and 3 show the results of an experiment using the ventilation device of the present invention in a wind tunnel. Figure 2 shows that the ratio of intake air amount is determined by the ratio of the area of the suction port 3a to the cross-sectional area of the ventilation duct 4. It represents a changing state.

As can be seen from FIG. 2, when the ratio of the area of the suction port 3a to the ventilation duct 4 is 7, the increased air efficiency is the highest.

Also, Figure 3 shows the air intake duct 2 as the running wind introduction section.
The length of a in the longitudinal direction is expressed as the equivalent diameter (Equjval
ent 1) ja,) for te wari fc things. It shows the ratio of intake air amount.

It can be seen from FIG. 3 that when the ratio of the length of the air intake duct to the equivalent diameter is 1 or more, the ratio of the intake air amount becomes significantly large.

As shown in FIG. 4, the damper 7 is controlled by remote control in response to a control signal from a controller 8 provided within the steering room.

That is, it is possible to receive the opening/closing degree signal of the damper 7 from the controller 8, drive the damper 7 by the actuator f-:r---19i/in, and control the introduction of air into the engine room 5. .

Note that this control is performed using a signal that detects the position of the damper 7 using a sensor 1o such as a potentiometer.

This is performed by calculating the difference between the signal from the controller 8 and the signal from the controller 8 using an adder/subtractor 11, and is configured as a feed bank control system.

As shown in FIG. 5, in the second embodiment of the present invention, the inner atrium part 2b of the torii-shaped bridge 1' is used as the traveling wind introduction part.

In other words, when the enlarged opening 3 of the air introduction section 2 is provided on the stern side of the existing structure that has the effect of collecting wind in the torii type bridge 1', almost the same effect as providing the air intake duct 2a can be obtained. be.

In the ventilation system of the second embodiment, the air introduction part 2 is constituted by an inner atrium part 2b of the bridge 1' and an enlarged opening part 3, and is provided in the upper part 1/a of the bridge 1'. .

When the device shown in Figure 5 is installed on an ore carrier, the third
When the ratio of the air intake length to the equivalent diameter shown in the figure is 1.8, the intake air amount ratio of 96 inches was changed. here,
The ratio of the suction port area to the ventilation duct area is set to 7.

For the ventilation system of the second embodiment, a wind tunnel experiment of the 1/100 model was carried out on the assumption that an ore carrier was traveling at a speed equivalent to 13 knots.

The data obtained from this experiment are as shown in the first table, and an air inflow amount of approximately 660 (rn'/m) can be secured.

Here, the inlet area of the air introduction part 2 is 2268 (m')
C height is 2.7 (ml x width 8.4 (,,)), and the area of one ventilation duct 4 is 3.24 (rn”) (length
．． 8 (mj x width 1.8 (m)).

The length of the air intake 2a or the inner atrium of the bridge 1' is part 2.
The length of b is 7.2 (m).

In addition, the surplus air volume is defined as the amount obtained by subtracting the insufficient air volume from the air volume produced by the ventilation system of the present invention. The air introduction section has an air introduction section disposed facing in the direction of the ship, and a ventilation duct that blows air from the air introduction section to the engine room. It has a simple structure that includes a damper that remotely controls the introduction of air in response to a control signal from an installed controller.

Traveling wind can be efficiently introduced into the engine room, and the number of ventilation fans can be reduced, reducing equipment costs and contributing to energy savings.

[Brief explanation of the drawing]

1 to 4 show an inboard engine room ventilation system as a first embodiment of the present invention, FIG. 1 is a perspective view showing its overall configuration, FIGS. 2 and 3 are graphs showing its operation, FIG. 4 is a control electric circuit diagram thereof, and FIG. 5 is a perspective view of an inboard engine room ventilation system as a second embodiment. 1.1'...Funbridge, la, l'a...Funbridge upper part, 2...
Air introduction part, 2a... Air intake duct as a running wind introduction part, 2b... Atrium as a running wind introduction part, 3...
Reducer as an enlarged opening, 3a... Suction port, 3
b...Exhaust port. 4-・Ventilation duct, 4a tatami/air outlet, 5・・engine room, 6
...Discharge port, 7. Damper, 8. Controller, 9. Actuator, 10. Threat sensor. 11... Adder/subtractor, A... Bow direction. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 Figure 3 Air Ear 2 Person Tough [σ・1 Death / Equivalent L 4 Figure 8 11 9
7Figure 5

Claims (1)

[Claims] In the upper part of the bridge, the air introduction section is provided with an air introduction section arranged toward the bow direction, and a ventilation duct that blows air from the air introduction section to the engine room, and the air introduction section is an enlarged opening that expands toward the bow direction. The patent is for a damper that remotely controls the introduction of air in response to a control signal from a controller installed in the steering room. Inboard engine room ventilation system.