JPS6211719B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering system for a ship, and more particularly to a hydraulic circuit capable of arbitrarily switching between a plurality of sets of pump units for operating a hydraulic steering gear.
Normally, the hydraulic pump in a hydraulic steering system is controlled by the same hydraulic pump control circuit during both manual steering and automatic steering. The first example is
This will be explained based on the diagram. In the figure, the steering instruction device 1 confirms the direction using the gyro compass 2, and determines the steering angle based on the direction on the pilot stand 3.
This is to give instructions to the hydraulic pump control device 4.

Here, the operator determines whether to use manual steering or automatic steering and which hydraulic pump to use based on the situation at the time, and there is a switch (not shown) on the pilot stand 3 that can be operated based on the judgment. is provided.

Next, the hydraulic pump control device 4 will be explained. Normally, a large electric hydraulic steering gear is equipped with two or more sets of pump units, and therefore has two or more control circuits. When this occurs, the steering gear can continue to operate by switching to a healthy circuit. Also, during emergency steering, two sets of pump units may be used together. First, the operator decides whether to use No. 1 variable displacement large hydraulic pump 9, No. 2 variable displacement large hydraulic pump 9', or a combination of No. 1 and 2 variable displacement large hydraulic pumps 9 and 9'. Then operate the changeover switch on the pilot stand 3. Here, we will explain in detail the case where the No. 1 variable displacement large hydraulic pump 9 is used. The voltage from the pilot stand 3 passes through an electric line to the control amplifier 6 of the manual/automatic steering circuit 5, where it is amplified and then drives the torque motor 7. let me,
The control amplifier 6 controls the oil amount and suction/discharge direction of the No. 1 variable capacity large hydraulic pump 9, and detects the potential difference of the torque motor 7 with the potentiometer 8.
feedback to correct the voltage. By repeating this process, the amount of oil sucked and discharged by the No. 1 variable displacement large hydraulic pump 9 is appropriately controlled. Further, an electric motor 10 for driving the pump is installed near the No. 1 variable displacement large hydraulic pump 9. Note that this control circuit is a dual-use circuit for manual steering and automatic steering.

Next, the steering gear 11 will be explained. Oil sucked and discharged from the No. 1 variable displacement large hydraulic pump 9 passes through a pipe to operate the rams 13 of four sets of hydraulic cylinders 12, and the rudder shaft 15 mounted on the rudder shaft 14 operates the rams 13 of four sets of hydraulic cylinders 12. The rudder shaft 14 is rotated by driving. A link 16 attached to the rudder handle 15 is connected to a rudder translator 17, which detects the actual rudder angle and transmits it to the pilot stand 3.
The commanded rudder angle is corrected by feedback.

As explained above, the hydraulic pump in conventional hydraulic steering systems is controlled by the same hydraulic pump control circuit during both manual steering and automatic steering, so the hydraulic pump is suitable for large-capacity control during manual steering. However, when it comes to small-capacity control during automatic steering, the steering performance deteriorates significantly.
Namely, there are drawbacks such as an increase in the dead area of the hydraulic pump, a delay in control speed, and difficulty in responding sensitively and accurately to a displacement control command. Moreover, since manual steering is only used for a short time when entering and exiting a port, and automatic steering during ocean voyages is used for a long time, reducing the steering performance during automatic steering will lead to increased fuel consumption.

The present invention was made in view of these problems, and provides automatic steering during ocean voyages by providing an automatic steering dedicated circuit equipped with a small capacity hydraulic pump dedicated to automatic steering in addition to the normally equipped power hydraulic pump. In addition to improving performance, it also improves ship handling performance.
In turn, the purpose is to reduce the power consumption of ships.

The first feature of the present invention is that in a hydraulic pump control device for a hydraulic steering device, an automatic steering circuit and a manual steering circuit are provided separately, the hydraulic pump of the automatic steering circuit has a small capacity exclusively for automatic steering, and the manual steering circuit The hydraulic pump is configured as a large-capacity pump exclusively for manual steering.

The second feature is that the hydraulic pump control circuit has an automatic steering-only circuit and a manual/automatic steering circuit, and the hydraulic pump in the automatic steering-only circuit has a small capacity dedicated to automatic steering, and the hydraulic pump in the manual/automatic steering circuit is manual. The main feature is that it is constructed as a large-capacity vehicle with a steering function.

According to the above-mentioned hydraulic steering device of the present invention, hydraulic pump control circuits for automatic steering and manual steering are provided separately, so a hydraulic pump control circuit that suits the purpose and function of steering performance is adopted, and in particular, the steering time is By adopting a small-capacity hydraulic pump suitable for the steering function during automatic steering during long ocean voyages, the power consumption of the hydraulic pump can be reduced, and the rudder angle rotation speed is slow, resulting in less bow wobbling, making it easier to maintain the ship. This improves needle performance, which in turn improves steering performance.

In addition, existing ships can be easily retrofitted by simply installing an automatic steering dedicated circuit in addition to the normally equipped power hydraulic pump, and exhibit the same effects as described above.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3. Note that the same reference numerals as in the conventional example (FIG. 1) indicate the same or almost the same structures.

In FIG. 2, a steering instruction device 1 confirms the direction using a gyro compass 2, and instructs a hydraulic pump control device 4 from a pilot stand 3 to determine the steering angle based on the direction. Here, the use of automatic steering and manual steering and which steering circuit to use are decided by the pilot based on the situation at the time, and there is a switch (not shown) on the pilot stand 3 that can be operated based on the judgment. is provided. The operation procedure of this steering instruction device 1 is the same as the conventional method, and the only difference is that the number of steering circuits is increased.

Next, the hydraulic pump control device 4 will be explained. The automatic steering circuits 18, 18' and the manual steering circuit 2
4 and 24' are provided individually, and the automatic steering circuit 18 can be activated by operating a switch on the pilot stand 3.
Assuming that the No. 1 variable displacement small hydraulic pump 22 is used, the voltage from the pilot stand 3 is amplified through the electric line to the control amplifier 19 of the automatic steering circuit 18, and then drives the torque motor 21 to drive the No. 1 variable displacement hydraulic pump 22. The amount of oil and the suction/discharge direction of the small-capacity hydraulic pump 22 are controlled, and the potential difference at that time is detected by the potentiometer 21 and fed back to correct the voltage of the control amplifier 19. By repeating this process, the amount of oil sucked and discharged by the No. 1 variable displacement small hydraulic pump 22 is appropriately controlled. Further, an electric motor 23 for driving the pump is installed near the No. 1 variable displacement small hydraulic pump 22.

When using the automatic steering circuit 18 in this way,
The mechanism is the same and the operating procedure is the same as before, except that the capacity of the No. 1 variable capacity small hydraulic pump 22 and the electric motor 23 have been downsized to match the steering function.

Next, if the manual steering circuit 24 is used by operating a switch on the pilot stand 3, the voltage from the pilot stand 3 will be amplified by entering the control amplifier 25 of the manual steering circuit 24 through an electric line, and will be amplified from the No. 3 large hydraulic pump 26. The amount of oil sucked and discharged is directly controlled by a solenoid valve 28. Therefore, the operation and structure of the No. 3 large hydraulic pump 26 of the manual steering circuit 24 are simplified without adopting a variable displacement type. Further, an electric motor 27 for driving the pump is provided near the No. 3 large hydraulic pump 26.

Next, to explain the steering gear 11, the oil sucked and discharged from the No. 3 large hydraulic pump 26 is transferred to the solenoid valve 28.
The hydraulic pressure is controlled by the hydraulic cylinders 12 through pipes, and the rams 13 of the hydraulic cylinders 12 are actuated to drive the rudder shaft 15 attached to the rudder shaft 14, thereby rotating the rudder shaft 14. It is. A link 16 attached to the rudder handle 15 is connected to a rudder translator 17 to detect the actually moved rudder angle, and feed back to the pilot stand 3 so that the commanded rudder angle is corrected. The solid lines in the figure are electrical circuits, and the dotted lines are hydraulic lines.Although not shown, each hydraulic line is equipped with a valve to prevent oil from flowing back into the inactive pump side. .

Next, referring to FIG. 3, in the figure, the hydraulic pump control device 4 includes a conventionally installed manual and automatic steering circuit 5, 5', an automatic steering dedicated circuit 18,
18' is provided separately, and the automatic steering dedicated circuit 18,1
The 8' hydraulic pump has a small variable capacity.
The present invention is applied to an existing ship, and the same effects as those described above are obtained. The steering circuit system is the same as described above, so a description thereof will be omitted.

[Brief explanation of the drawing]

Figure 1 shows a conventional hydraulic steering device, and the second
The figure shows a hydraulic steering device to which the present invention is applied, and FIG. 3 shows a hydraulic steering device to which the present invention is applied to an existing ship. 1... Steering instruction device, 2... Gyro compass, 3... Pilot stand, 4... Hydraulic pump control device, 5... Manual and automatic steering circuit, 6, 1
9,25...control amplifier, 7,20...
Torque motor, 8, 21...potentiometer,
9...No.1 variable capacity large hydraulic pump, 10,2
3, 27...Electric motor, 11...Steering machine, 1
2... Hydraulic cylinder, 13... Ram, 14...
Rudder shaft, 15...Rudder handle, 16...Link, 17...
Rudder translator, 18... automatic steering circuit,
22...No.1 variable capacity small hydraulic pump, 24...
...Manual steering circuit, 26...No.3 large hydraulic pump, 28...Solenoid valve.

Claims (1)

[Claims] 1. A steering instruction device that indicates a direction and a steering angle;
In a steering device consisting of a hydraulic pump control device that drives a hydraulic pump to control the flow rate and suction/discharge direction of oil, and a steering gear that rotates a rudder shaft using a hydraulic cylinder, the hydraulic pump control device has an automatic steering circuit and a manual steering system. A hydraulic steering device characterized in that a hydraulic pump of the automatic steering circuit is provided with a separate steering circuit, the hydraulic pump of the automatic steering circuit has a small capacity exclusively for automatic steering, and the hydraulic pump of the manual steering circuit has a large capacity exclusively for manual steering. 2. A steering instruction device that indicates direction and steering angle;
In a steering device consisting of a hydraulic pump control device that drives a hydraulic pump to control oil flow rate and suction/discharge direction, and a steering gear that rotates a rudder shaft using a hydraulic cylinder, the hydraulic pump control device has a circuit dedicated to automatic steering. A hydraulic system comprising a manual/automatic steering circuit, wherein the hydraulic pump for the automatic steering circuit has a small capacity for exclusive use for automatic steering, and the hydraulic pump for the manual/automatic steering circuit has a large capacity and has a manual steering function. type steering device.