JPS582910A - Constant speed control method for ships equipped with fixed pitch propellers - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant ship speed 1111MI7+ method for a ship using a fixed pitch propeller, and in particular maintains the ship speed set from the sailing schedule against changes in all operating conditions. The present invention relates to a ship speed control method that can control ship speed.

As a method for maintaining a constant ship speed, a method using a variable pitch propeller is disclosed in Japanese Patent Laid-Open Publication No. 52-22298, etc., but an automated method for chartering a fixed pitch propeller age ship is not yet known.

Normal ships are often subject to considerable constraints on their schedules, and therefore must operate at a constant speed for a certain amount of time; however, ships equipped with fixed-pitch propellers are required to maintain this speed. Conventionally, this control has been performed by the crew manually operating the main engine, and it is necessary to secure the personnel to maintain this constant speed operation. This invention was made in view of the recent demand for labor saving, and is aimed at achieving automation of constant speed operation in a ship equipped with a) fixed pitch propellers.

That is, in the method of controlling the constant speed of a ship equipped with a fixed pitch propeller according to the present invention, the set horsepower corresponding to the ship speed setting value is determined from the lumped horsepower and the ship speed detection value, and the current horse power detection value and the current oIg1. The rotation speed is detected and the main engine rotation speed is controlled by determining the nine set times corresponding to the above two set horsepower from the output value, or the setting rack scale is determined from the specified rotation speed and the above set horsepower. It is characterized by controlling the main engine (based on the set rack HmK), and can automatically spread the current ship speed to the set ship speed, keeping the ship speed constant. It is something that can be done.

Below are details about the 10 Tsukudaiagera 5 shown in Figure 1, which is the invention of the present invention. In Figure 1, 1 is a boat speed setting dial that sets the desired boat speed at that time, 2#i is a dial that measures the number of revolutions of the propeller shaft.
3 is a rotation number transducer〉, which biases the number of rotations measured by the above-mentioned rotation speed detection l112. , 5 is the above-mentioned one-turn number transmission 113 and Ratsu #li1 Mori blackmail -4
*H is a horsepower calculator that calculates the horsepower of the ship from the number of rotations sent and the number of racks per turn, and 6 is an electric power calculator that calculates the actual ship speed at that time. 7 is a ship speed transmitter that falsely indicates the ship speed, and 8 is the horsepower and ship speed sent from the horsepower calculator 5 and the ship's speed 4III 117, respectively, and the ship's ship speed. Sent from constant dial 1
W&! This is a set horsepower calculator that calculates the set own horsepower from ships as described below. 10 is a setting rack scale calculator which calculates 2 to 1 increments from the setting horsepower from the 9-ke II & constant horsepower calculator 8 and the set rotational speed from the setting rotation threat device 11 to be described later; 10 is the setting horsepower calculator 8; This is a setting/rotation speed calculation unit that calculates the set free rotation speed from the current horsepower value from the setting horsepower and horsepower calculation unit 5 and the current rotation speed from the rotation speed detector 3 as described later. 11 companies The above setting - Roll number calculated by 4110 9 Setting - Roll number! II biased settings-
It is a rotation number transmitter. 12 is the set rack scale calculation Wh
This is a 2-tick scale control steamer to set the rack scale from 9 onwards. Reference numeral 13 indicates a nine-point 01 rotation number system m setting sent from the set rotation speed transmitter 11 to set the set rotation number.

More details about the above setting horsepower calculation 468 for the second @
AKWN, - do. In FIG. 2, -somu is the relationship between the ship's speed and the required horsepower under the standard loading state of the ship lI% and the standard sea and meteorological condition lIK. By storing this value in the set horsepower calculation 118, the horsepower of the ship in the voyage state of the primary K and the fresh WIA can be obtained by the horsepower calculation SSZ and the ship speed transmitter 117). This horsepower is Pb.

Let the ship speed be vb. This navigation state is indicated by the dots in the diagram. In this respect, horsepower and ship speed O in the sailing state at that time
Nine people looking for a relationship are 11"L"Toru. This can be determined using the following method.

First, approximate the ship speed and horsepower OII equation to the following formula OII equation.

p m-q ・V (1) In the intestine, the horsepower patse Pa for the boat speed Wb, Vo K is memorized from the 9 horsepower and the boat speed ○-.

, substitute this into equation (1), and solve the simultaneous equations to find qe r. Let the O values be ql and rl.

Next, %-one is approximated, for example, as in the following equation.

P Ning 6, vra・・・・・・・・・・・・(
2) (Pb @ Vie) 1st generation” in the divine ceremony,
Q bt kl) By this method, the ship speed V
b + c) Vo's 5iso * 5 lki, le, + 4 QL gain: L, Gang, fki 0 type coin) (2) can be replaced with the m0 type, and in this application, this is not fixed. Good.

Therefore, in the state of voyage III at that time, the ninth ship sailing at VO speed was 4! P's horsepower PboFi, can be sand molded by two.

Regarding the above-mentioned set rotation speed calculator 10, please refer to Fig. 3.
Explain pHlK. In Fig. 5, the - line is the ship O standard loading condition lI% and the standard sea and meteorological condition 11 &
This is the relationship between the number of rotations and the required horsepower. Store this summation in the setting 1 rotation number calculator 10. Next, the actual IIO voyage 1
The horsepower and rotation speed at 1 are obtained by the horsepower calculator 5 and the rotation speed transmitter S. This horsepower is PB, rotation speed is Nb
shall be. This navigation state is Ojb in the figure. From this point, it is -1 to find the relationship between the horsepower and the number of revolutions in the self-navigating state.This finding is done by the following method.

First, the relationship between the -number of rotations and the horsepower is approximated by, for example, the @ relation of the following equation.

P ■ 1・N l ,...(sJ-i.e.,
- In the summary, from the relationship between the memorized 9 horsepower and the number of revolutions, the horsepower Pb, ,' is obtained by the setting horsepower calculator 8, and the film constant horsepower P.
Find the rotational speeds Nmb and Nao for the equation, substitute them into equation (to), solve simultaneous equation 1, and find - and P. Let the O value be 11 and y be the value.

Next, %--B is approximated by the following formula O.

P - lead b - N'' --- (4) Substitute the point 1m (Pbe Nb) into equation (4) and find IIb.

(by the umbrella method) the horsepower P- to the pools can be approximated satisfactorily.

Therefore, the voyage of Ii is 1l (sPvh, horsepower P
According to OK, the nine-turn number Nbo Ii, the main shield calculated by equation (4) is as described above, O% from Latta Maromori @ 164, O2 Tsuta ■ Mori and one-turn number transmission II 3, O1 in the current state
1 revolution and 31% The current horsepower is calculated by horsepower calculation @SK, and from this calculation result and the ship's speed setting dial 1, based on the OII state, The film constant horsepower is calculated according to the speed using the set horsepower calculator 8, and the film constant revolution speed is calculated according to the set horsepower using the set horsepower, the current horsepower P, and the current rotation speed N by the set-rotation speed calculator 10. Then, this set rotational speed is compensated for by the setting-rotation speed IIA amount 11), and the main engine 1 rotation speed is controlled by the Kli rotation control S ring 13 so that the set rotation speed K is achieved. Alternatively, the set rack scale is calculated from the set rotation speed from the set rotation speed transmitter 11 and the set horsepower from the membrane constant horsepower calculator 8 described above *9
〉Determine the setting foot/l scale, and use the rack scale to calculate (1)
It may also be possible to control the main engine by adjusting the flow rate.

As described above, the current speed of the ship can be quickly matched to the set speed of the ship, and the speed of the ship can be automatically maintained constant.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of the present invention 8A.
Figure 2 is a characteristic diagram showing the relationship between ship speed and required horsepower. il
i is a characteristic diagram showing the relationship between required horsepower and rotational speed. 1: Ship speed setting dial, 2: 1 rotation speed check aSS. 3: 11 rotation threat device, 4: Tsutsuta L Seijuki device, 5: Horsepower calculator, 6: Ship detection aid, 7: Ship speed threat device,
8: Setting horsepower calculation - 19: Setting rutter scale calculator,
10: Setting horsepower calculator, 11: Setting rotation speed transmitter,
12: Terra 0 control device% 15: Rotation speed control device. Representative Patent Attorney Tadashi Sato Figure 2 Figure 3 WI - Touge

Claims (1)

[Claims] The set horsepower corresponding to the ship speed setting value is determined from the winged O-horse oak and the ship speed detection value, and the set rotation speed corresponding to the set horsepower is determined from the current horse power test tB value and the current rotation speed detection value, and the main engine The ship speed in a ship equipped with a fixed pitch propeller is characterized in that the main engine is controlled by controlling the rotation IB, or by determining a set rack @ scale from the set rotation speed and the set horsepower, and controlling the main engine (according to the set rack scale). Constant control method.