JPS5952621B2 - Ship uninterruptible power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION As the automation of ships progresses, ensuring power supply is essential for the safe operation of the ship, and therefore there is a tendency for in-board power supplies to be required to be even more reliable.

As shown in the diagram, the power supply system of the target ship is the main engine 1.
The input shaft 4 of the reducer 3 is connected to the output shaft 2 of the reducer 3, the first output shaft 5 of the reducer 3 is connected to the propeller 6, and the second output shaft 7 is connected to one side of the navigation generator 8 via the clutch A. It is connected to the input shaft 9 of. During normal sailing, clutch A is turned on (
The propeller 6 and generator 8 are driven by the main engine 1 with the clutch B OFF (disengaged), but due to rough weather or an abnormality in the main engine, the frequency generated by the generator 8 may be set in advance. specified width (e.g. 55-60
(above) deviates either above or below, or even if it is within that range, it exceeds a predetermined fluctuation value (for example, ±2 output), and if the power generation by the generator 8 causes a problem, conventionally Start another diesel generator set,
The switching is done by instantaneous power outage, or by starting the backup engine 12 and turning off clutch A, and after a blackout, clutch B is turned on to restore power. Therefore, in either case, the problem of temporary power outage is unavoidable. In the present invention, when an abnormal situation occurs in the frequency generated by the generator 8, the pack-up edge 12 is automatically started instead of the main engine 1 as the drive source motive for the generator 8, and drives the generator 8 without interruption. It was designed to do so.

Next, embodiments will be described with reference to the drawings. 14 in the figure is the generator 8
The other input shaft (a shaft integrated with the input shaft 9), ]5 is the output shaft of the butterfly-up engine 12, and the two can be connected via a clutch B.

During normal navigation, clutch A is held at 0N (connected) and clutch B is held at 0FF (disengaged), and the generator 8 serves as a power source necessary for navigation. Reference numeral 16 denotes a frequency abnormality detection device, which detects whether the generated frequency of the generator 8 deviates above or below the specified range due to bad weather or an abnormality in the main engine 1, or exceeds the specified fluctuation range even if it is within the specified range. Detects an abnormality and issues an abnormal signal.

Reference numeral 17 denotes a signal path, and reference numeral 18 denotes a driving device which is activated upon receiving an abnormal signal to automatically start the backup engine 12.

19 is a rotation speed detection device of the backup engine 12;
This is a device that issues a signal when the rotational speed of the backup engine 12 reaches a set value (a value set in advance in the governor) slightly below the specified range.

20 is a signal path, 21 is a clutch operating device, and the clutch operating device 21 automatically turns clutch B 0N (connected) when receiving a clutch B<7) 0N (connected) signal from signal 20.
do.

At that time, clutch A is still in the ON (connected) state. 2
2 is a clutch connection detection device which, after confirming ON (connection) of clutch B, issues an increased signal to the governor.

23 is a governor control device for the backup engine 12;
When the clutch B(7)ON (connection) signal is received from the signal path 24, an increase command is automatically given to the governor of the backup engine 12.

As a result, the set rotational speed of the governor is automatically increased at a controlled speed, the fuel rack is moved to the fuel increasing side, and the load on the backup engine 12 is increased. Reference numeral 25 denotes a rack position detection device, which emits a signal when it detects the rack position of a load set at or near the rating.

26 is a signal path, and 27 is a clutch operating device. When the device 27 receives a signal from the rack position detecting device 25, it operates to turn the clutch A OFF (released).

Next, the general operation will be explained.

When the main engine 1 is driving the generator 8, the generated frequency of the generator 8 may deviate above or below the specified range due to bad weather, main engine abnormality, etc., or even if it is within the range. When the specified fluctuation value is exceeded, the abnormality detection device 16 activates the startup device 13 and the backup engine 12 is automatically started. The governor of the backup engine 12 is initially set slightly below the lower limit of the starting width, and when the device 19 detects that the rotation speed has reached this speed, the clutch operating device 21 is activated and the clutch B is set to 0N (connection). become.

When the clutch B is turned ON (connected), the clutch connection detection device 22 is activated, and the governor control device 23 automatically gives an increase command to the governor of the backup engine 12, so that the load on the generator 8 is smoothly increased. Up engine 1
Move on to 2. When the load is shifted, the load including the generator load and propeller load is automatically shifted to the rated load of the backup engine 12 or a set load close to the rated load. When the rated load of the backup engine 12 or a set load close to the rated value is detected by the clutch position detection device 25, the clutch A is automatically turned off (disengaged) by the clutch operating device 27.

After that, the backup engine 12 carries only the generator load and continues to operate at a rotational speed within the specified frequency range of the generator 8. When the generator 8 can be driven by the main engine 1 due to the stormy weather subsides or the main engine 1 recovers to a normal state, the generator load can be switched to the backup engine 12 by pressing a switch button (not shown). to main engine drive.

After obtaining the switching signal, the governor control device 23 lowers the rotational speed of the backup engine 12 to a predetermined value slightly below the specified range, and after confirming this, automatically turns clutch A ON (connection). After that, the clutch B is turned 0FF (disengaged) and the power driven by the generator is transferred to the main engine 1 side, and then the butterfly-up engine 12 is automatically stopped. At the time of switching, even when the clutch is turned on (connected), the backup engine 12 has a lower rotational speed than the second output shaft 7 of the reducer driven by the main engine 1, so it does not carry the propeller load, and it will not be able to perform backup in the event of the next abnormality. When engine] 2 is started, the number of revolutions rises to a predetermined number of revolutions, which is slightly below the specified range. (Effect of the invention) The input shaft 4 of the reducer 3 is connected to the output shaft 2 of the main engine 1, the first output shaft 5 of the reducer 3 is connected to the propeller 6, and the second output shaft 7 is connected to the first clutch. In the power supply device of a ship or vessel, the power supply unit is connected to the input shaft 9 on the reducer 3 side of the generator 8 via the second clutch B; The main engine 1 drives the generator 8 by connecting the output shaft 15 of the backup engine 12 and normally turning the first clutch A ON and the second clutch B OFF.
an abnormality detection device 16 that detects an abnormality in which the frequency generated by the generator 8 deviates above or below a specified range, or exceeds a specified fluctuation range even if it is within the specified range; A starter device 18 automatically starts the backup engine 12 in response to a signal from the device 16, and the rotational speed is set slightly below the lower limit of the specified range in order to avoid a sudden load shift to the backup engine 12. governor and
a rotational speed detection device 19 for detecting the rotational speed of the backup engine 12; a second clutch operation device 21 that turns on the second clutch B when the backup engine 12.1 reaches the rotational speed; Clutch B (7) 0N
,0FF, and a second
Backup engine 1 after checking clutch B (7) 0N
a governor control device 23 that gives an increase command to the governor of No. 2;
and a rack position detection device 25 that detects that the load on the backup engine 12, including the generator 8 load and the propeller 6 load, has been shifted to the rated load or a load close to the rated load.
In response to the signal from the rack position detection device 25, the 14th
Since a first clutch operating device 27 is provided to turn clutch A off; (a) in the event of an abnormality, it will automatically switch to the backup engine 12, so there is no need to worry about response delays; Since the drive engine can be switched, it can supply stable, high-quality electricity that is especially suitable for ships, making it an excellent power source for ships in emergencies.

]) In order to avoid a sudden load shift to the backup engine 12, the second clutch B on the backup engine 12 side is disconnected by using a governor or the like that is set at a rotation speed slightly below the lower limit of the specified range. While in this state, the backup engine 12 can be set in advance to a rotational speed slightly below the lower limit of the specified range.

As a result, the load can be shifted easily, and the operation from the time when the second clutch B on the backup engine 12 side is connected until the first clutch A is disconnected and switching is completed can be quickly performed. be able to do it. In addition, the load can be transferred easily and smoothly without using a flywheel or the like, which is a large and heavy member. Therefore, it can be said that the power supply device according to the present invention is particularly suitable for use in ships. The switching process is shown in the following program diagram. 1) Generator 8
2) Switching the generator 8 from backup engine drive to main engine drive 5) Switching the generator 8 from backup engine drive to main engine drive

[Brief explanation of the drawing]

The figure is a schematic structural diagram of the device according to the invention. 1... Main engine, 2... Main engine 1 output shaft, 3... Reducer, 4... Input shaft of reducer, 5...・First output shaft of reducer, 6...
...Propeller, 7...Second output shaft of reducer, 8.
... Generator, 9 ... Reduction gear side input shaft of generator 1, 12 ... Backup engine, 14.
... Generator backup engine 1j input shaft,
15...Backup engine output shaft, 16
... Frequency abnormality detection device, 18 ... Backup engine starting device, 19 ... Rotation speed detection device, 21 ... Clutch operation device ,2
2...Clutch connection detection device, 23...Governor control J position, 25...Rack position detection device,
27...Kutsuchi operation device.

Claims (1)

[Claims] 1 Connect the input side 4 of the reducer 3 to the output shaft 2 of the main engine 1, connect the first output shaft 5 of the reducer 3 to the propeller 6,
In a ship's power supply device in which the second output shaft 7 is connected to the input shaft 9 on the reducer 3 side of the generator 8 via the first clutch A; The output shaft 15 of the backup engine 12 is connected via two clutches B, and the first clutch A is normally turned ON and the second clutch B is turned OFF so that the main engine 1 drives the generator 8; an abnormality detection device 16 that detects an abnormality in which the frequency generated by the device 8 deviates above or below a specified range, or exceeds a specified fluctuation range even if it is within the specified range;
The backup engine 1 is activated by the signal from the abnormality detection device 16.
2, a governor which is set to a rotational speed slightly below the lower limit of the specified width to avoid sudden load transfer to the backup engine 12, and a rotational speed of the backup engine 12. A rotation speed detection device 19, a second clutch operation device 21 that turns on the second clutch B when the backup engine 12 reaches the above rotation speed, and a clutch connection detection device 22 that detects whether the second clutch B is turned on or off. and O of the second clutch B.
After confirming N, the governor control device 23 gives an increase command to the governor of the backup engine 12, and confirms that the load has been shifted to the backup engine 12 to the rated load or close to the rated load, including the generator 8 load and propeller 6 load. An uninterruptible power supply for a ship, characterized in that it is provided with a rack position detection device 25 for detecting the rack position, and a first clutch operation device 27 for turning off the first clutch A upon receiving a signal from the rack position detection device 25.