JPH069600Y2 - Load control device for ship generator driven slipping clutch - Google Patents

Description

The present invention relates to a load control device for a slipping clutch that drives a generator at a constant speed from a main shaft of a ship via a hydraulic multi-plate slipping clutch.

The method of driving the generator from the main shaft at a constant speed regardless of the rotation fluctuation of the main shaft by slip control of the hydraulic multi-plate slipping clutch is more efficient than the drive system by a dedicated auxiliary engine provided separately from the main engine. Since low-quality fuel is used, its economic efficiency has attracted attention and has been widely adopted.

The normal method of controlling the output rotation speed of the hydraulic multi-plate slipping clutch is to detect the rotation speed of the output shaft, obtain a deviation by comparing the detection signal with a setting signal that gives a predetermined rotation speed, and calculate the deviation. The signal controls the clutch oil pressure. As the control device, there are a hydraulic type using a centrifugal control valve and an electric type using an electromagnetic pickup or tachogenerator.

Whichever control device is used, as long as a hydraulic multi-plate slipping clutch that controls the clutch plate pressing force to control the clutch output rotation speed is applied, when the load is small, Due to the influence of the turning phenomenon, the swinging torque becomes larger than the load torque, it is difficult to maintain a constant output rotation speed even if the pressing force is controlled, and there is a fluctuation in the rotation speed when the load is zero. Since there is a time lag between the detection and the clutch actuating in response to it, when the load is applied to the generator or when the load fluctuates when the load is low, the rotational fluctuation is allowed to go to the output side of the slipping clutch. Therefore, there is a drawback that the frequency of the current generated by the generator is temporarily changed.

As one of the means for preventing this rotation fluctuation, Japanese Patent Application No. 59-72669 discloses that an auxiliary load such as a hydraulic pump and a multi-plate friction brake is driven to the output side of the slipping clutch via the clutch. Thus, there is a description of a method of preventing the occurrence of the load fluctuation or the rotation fluctuation due to the supply by previously providing the auxiliary load when the generator is lower than a certain load. However, the hydraulic pump, the multi-plate friction brake, and the like as the auxiliary load device proposed here require mechanical connecting members, hydraulic pipes, hydraulic equipment, etc. for driving them, and therefore the device There is a problem that the whole structure becomes complicated and maintenance is time-consuming.

By giving the slipping clutch an auxiliary load of about 10% of the maximum allowable load, the influence of the clutch plate whirling is completely prevented, and there is no time delay in the clutch operation at the time of applying the load. The present invention is an auxiliary load device applied to a hydraulic multi-plate slipping clutch, which is provided with an electric resistor and a resistor open / close switch on the output side of a generator so that an auxiliary load is indirectly applied via the generator. , The opening / closing switch to the resistor is controlled so that it is closed when the load current of the generator is compared with the set value and it is opened when the load is increased. An object of the present invention is to provide an inexpensive auxiliary load device that does not require a mechanical driving member, is simple in structure and is easy to perform maintenance and inspection, unlike a brake or the like.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 is a main engine, and power is transmitted to a propeller 4 by a propulsion shaft 3 via a reduction gear 2 and a crankshaft of the main engine 1. The input shaft 8 of the slipping clutch 7 is connected to the gear 5 through the speed increasing gear device 6, and the generator 10 is connected to the output shaft 9 of the slipping clutch 7. The clutch 7 is a clutch plate 12 spline-fitted to a clutch carrier 11 which is integral with the input shaft 8.
And the clutch plate 14 spline-fitted to the hub 13 integral with the output shaft 9 are alternately arranged in contact with each other, and are arranged.
The clutch operating oil pressure supplied to the clutch piston chamber 15 provided in 11 causes the piston chamber 16 to slide in the piston chamber through a piston 16 that is slid in the axial direction to couple the two, thereby transmitting power from the input shaft 8 to the output shaft 9. It is configured to do.
The output shaft 9 is provided with a rotation speed detector 17, the detected signal is converted into a voltage signal through a digital-voltage converter 18, and a comparator 19 performs a comparison operation with a setting signal 21 from a setting device 20. The deviation signal 22 is obtained by amplifying the deviation signal 22 by the PID adjustment amplifier 23, and then the servo mechanism 25 of the hydraulic control valve 24 is controlled so that the hydraulic pump 26 moves from the oil sump 27 to the strainer 28, and the pressure regulating valve 29. The pressure is adjusted via the above hydraulic control valve 24
The hydraulic pressure to be supplied to is controlled to give the clutch operating hydraulic pressure. The clutch operating oil pressure thus obtained controls the slip ratio of the slipping clutch 7 so that the rotation speed of the output shaft 9 maintains a set value.

On the other hand, in order to obtain the magnitude of the load of the generator 10, the load current is detected and converted into the voltage signal 31 by the I / V converter 30, and the voltage signal 31 is divided into the lines 32 and 33 and divided as follows. The high and low setting signals are compared with each other, and the positive and negative changes actuate a relay that opens and closes the resistor to control the resistor to turn on when the load on the generator decreases.

A line 35 from the generator 10 to the resistor 34 is provided with a resistor opening / closing switch 36 operated by a relay 38 of a self-holding circuit 37 operated by the above-mentioned detected voltage signals 32 and 33. The detection voltage signal 32 is first passed through the normally closed switch 39 and then passed through the low operation comparator 41 to be compared with the lower setting signal 40,
When it is smaller than the setting signal 40, a positive electric signal is output, and when it is larger, a negative electric signal is output to the line 42 and applied to the base of the transistor 43. The transistor 43 is line 42
When the signal of is positive, that is, when the load of the generator decreases below the set value, the normally open switch 46 is closed by passing a current through the line 44 to excite the relay 45 provided in the line 44. As a result, the normally-closed switch 49 on the line 48 connected to and connected to the line 47 of the self-holding circuit 37.
The relay 50 is excited by energizing through the switch and the normally open switch 51 is closed. As a result, the switch 51 is self-held and the relay 38 is placed in the excited state. The opening / closing switch 36 is closed by the excitation of the relay 38 and an auxiliary load is applied to the generator 10. At the same time, the normally closed switch 39 is opened and the signal of the line 32 is cut off, so that the relay 45 is excited. As a result, switch 46 is opened, but switch 38 remains closed because relay 38 is self-holding, and the resistor load remains. The normally open switch 53 provided on the line 33 is closed by the excitation of the relay 38, and the detected voltage signal is sent to the high operation comparator.
54, and compares it with the higher setting signal 55
When it is smaller than 55, a negative electric signal is output, and when it is larger, a positive electric signal is output to the line 56 and applied to the transistor 57. The transistor 57 is a normally closed switch 49 only when the signal on the line 56 is positive, i.e. when the generator load increases above a set value, a current is passed through the line 58 to excite a relay 59 provided on the line 58. Open and turn off the relay 38 excitation. As a result, switch 36 is opened and resistor 34
When the power supply to the generator 10 is cut off, the auxiliary load that has been given to the generator 10 is cut off.

On the other hand, at the same time, the normally closed switch 39 and the normally open switch 53 of the detection voltage signal line return to the restored state for re-operation.

As described above, the self-holding circuit is activated based on the lower setting signal to turn on the auxiliary load, and the signal to the self-holding circuit is cut off, and then the self-holding circuit is turned off based on the higher setting signal to turn on the auxiliary load. Since the power is cut off, hunting can be prevented when turning on and off the auxiliary load due to load fluctuation.

The present invention provides an auxiliary load for applying to the hydraulic multi-plate slipping clutch at a low load by a resistor connected to the output side of the generator driven by the slipping clutch, and the resistor is applied to the generator load. It detects fluctuations and turns on with a low detection signal and shuts off with a high detection signal, which simplifies the configuration and operation of the auxiliary load device and eliminates the use of mechanical drive members or hydraulic piping. Not only is maintenance and inspection easy, but it is also inexpensive, and there is an effect that a stable output rotation speed can be obtained even under a low load.

[Brief description of drawings]

FIG. 1 shows a block diagram of a drive unit of a generator and a circuit diagram of a control unit. 1 ... Main engine, 6 ... Speed increasing gear device, 7 ... Hydraulic multi-plate slipping clutch, 10 ... Generator, 30 ... I / V
Converter, 34 ... Resistor, 36 ... Resistor open / close switch, 37
...... Self-holding circuit, 38,45,50,59 …… Relay, 39,49 ……
Normally closed switch, 46, 51, 53 ... Normally open switch, 40, 55
...... Setting signal, 41,54 …… Comparator, 43,57 …… Transistor

Claims (1)

[Scope of utility model registration request] 1. A marine generator driving device for driving a generator from a main shaft of a ship through a hydraulic multi-plate type slipping clutch at a constant speed, as a supplementary load device on the load side of a generator (10). A resistor (34) and the resistance resistor (3
4) A self-holding circuit (37) provided with a resistor open / close switch (36) for connecting and disconnecting the generator (10) and a relay (38) for operating the resistor open / close switch (36). Is provided, the load current of the generator (10) is detected and compared with a predetermined setting signal by the comparators (41, 54), and when the detection signal is lower than the lower setting signal (40), The holding circuit 37 is closed, and the relay (38)
To close the resistor open / close switch (36), and when the detection signal exceeds the higher setting signal (55), the self-holding circuit (37) is turned off, and the relay (38) is demagnetized to deactivate the resistor. A load control device for a marine generator driving slipping clutch, comprising a control circuit for controlling the opening / closing switch (36) to open.