KR0154888B1 - Propeller pitch auto control method for a ship - Google Patents

Abstract

The present invention relates to an adjustment method for automatically changing the pitch of a trawler propeller in three stages by a microprocessor. Since the propeller is a fixed type in a conventional trawler, the speed is controlled only by the change in the RPM of the main engine. Therefore, the engine output drops drastically because the RPM is very low in the section where extremely low speed is required, such as the double mesh process, and the hydraulic winch (Winch) used directly on the engine shaft does not operate normally. The change in RPM may be severe and there is a problem in that the engine is unreasonable. However, in the present invention, the pitch angle indicator 4 of the propeller is connected, and the pitch angle is gradually controlled by the signal from the pitch angle indicator 4. The pitch controller 3 is connected between the remote control means 5 and the propeller adjustment opening 2 described above to shift the work. By the pitch angle adjustment of the variable pitch propeller is easily made in three steps.

Description

Trawler propeller pitch automatic adjustment

1 is an operation explanatory diagram of a propeller pitch adjusting device according to the prior art.

2 is a control flow chart of the present invention,

(a) is a control flowchart at the time of propeller pitch angle increase.

(b) is a control flowchart at the time of propeller pitch angle reduction.

3 is an explanatory view of the operation of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: variable pitch propeller 2: propeller adjustment hole

3: Pitch controller 4: Pitch angle indicator

5: remote control means 6: engine

9: pitch angle increase switch 10: pitch angle decrease switch

11: spindle 12: propeller shaft

The present invention relates to an automatic adjustment method for varying the pitch of a ship propulsion propeller in three stages by a microprocessor. More specifically, the three-step adjustment of the pitch angle of a ship propeller mainly used for trawlers is possible. The present invention relates to a method for automatically adjusting the pitch of a propeller that allows a ship to speed up or slow down with a constant engine force.

In general, trawlers perform the process of sailing from coast to fishing grounds, the process of reaching the fishing grounds with nets, and the process of raising the fishing nets with meat onto the deck. It is a section that requires fast moving speed, and the netting process is a process that draws the net to the sea to catch fish and slowly attracts the meat into the net while slowly progressing, and the netting process is a fishing net containing meat. The lowest speed is required because it raises the pressure.

In the conventional trawler, since the propeller was fixed, the above-described shifting process is performed only by the change in the RPM of the main engine. However, in the section where the ultra low speed is required, such as a wire mesh process, the RPM is very low. In addition, the hydraulic winch (Winch) that is directly used by the engine shaft is not normally operated, and if it is used for a long time in this state, there may be a problem in that the change in the RPM may be severe and the engine may be unreasonable.

In order to solve the above problems, conventionally, as shown in FIG. 1, the pitch angle of the propeller uses a variable pitch propeller 1 in which the propeller shaft 12 and the engine of the variable pitch propeller 1 are not fixed. The pitch pitch of the variable pitch propeller 1 is changed in accordance with the navigation conditions by providing a variable pitch propeller adjusting tool 2 operated by the propeller pitch remote control means 5 between the main shafts 11 of (12). A method for changing the navigation speed has been devised, but in the above method, since the propeller pitch remote control means 5 is a manual operation method using a steering wheel or the like, it is difficult to accurately adjust the angle of the propeller pitch, and a large number of manual operations are performed by the experience side. Since the operation is inconvenient as well as there was a problem that can shorten the life.

Further, in order to solve the above problem, Japanese Patent Publication No. 52-12478 discloses a device in which the pitch angle of the propeller is automatically adjusted according to the sailing conditions by inputting the optimum propeller pitch angle with respect to the engine rotation speed in advance. Since it is an expensive equipment, it is difficult to apply it to trawlers, and in the trawler, as described above, the three sailing conditions of sailing work, preliminary work, and double-wing work are sufficient, and the pitch angle of the fine propeller is not necessary. There was a problem that the equipment is not practically used.

In order to solve this problem, in the present invention, the pitch controller compares the detected value and the preset pitch value step by step from the indicator indicating the pitch angle of the propeller in three steps. It is an object of the present invention to provide a propeller pitch angle automatic adjustment method capable of adjusting the pitch angle of the propeller by operating and an automatic adjustment device of the propeller pitch angle by the above method.

Hereinafter, described in detail by the accompanying drawings as follows.

As shown in FIG. 3, the variable pitch propeller adjusting tool 2 operated by the remote control means 5 between the propeller shaft 12 of the variable pitch propeller 1 and the main shaft 11 of the engine 6. In the propeller pitch automatic adjustment device is installed, the pitch controller 3 is connected to the pitch angle indicator (4) and the pitch controller (3) for controlling the pitch angle step by step from the pitch angle indicator (4) remote control means (5) And between the propeller adjustment holes 2 described above.

In addition, the pitch angle indicator 4 is connected to the pitch controller 3 such that the pitch angle of the variable pitch propeller 1 is sensed through the pitch controller 3, and the pitch angle indicator 4 has a sensitivity. An excellent potentiometer voltage detection device is constructed, and the remote control means 5 comprises a pitch angle increasing switch 9 and a pitch angle reducing switch 10.

The operation method of the apparatus of the present invention configured as described above is as follows.

When the remote control means (5) the pitch angle increase switch (9) or the pitch angle decrease switch (10) is activated, the input value from the pitch angle indicator (4) and the pitch controller (3) connected to the pitch angle indicator (4) The pitch angle of the variable pitch propeller 1 is adjusted step by step by operating the propeller adjusting tool 2 until it is matched with each other by comparing the set values input in 3 stages (navigation work, preliminary work, double work) by experience in advance. The remote control means (5) comprises a pitch angle increasing switch (9) and a pitch angle reducing switch (10) and the variable pitch propeller (1) increases step by step by operating the switches (9, 10). Or decrease.

(A) and (b) of FIG. 2 are control flow charts showing that the pitch value of the variable pitch propeller 1 is changed when the pitch angle increase switch 9 or the pitch angle decrease switch 10 is connected during navigation. When the pitch angle increase or decrease switches 9 and 10 are turned on, the propeller pitch angle of the current state is first inputted from the pitch angle indicator 4 to the pitch controller 3, and the pitch increase relay at the propeller adjuster 2 is first applied. Alternatively, the pitch angle adjustment of the variable pitch propeller 1 is stopped when the pitch reduction relay is operated to reach the next value (target value) of the present state value among the three stage propeller pitch angles input into the pitch controller 3. If the target value is not reached, the pitch is adjusted until it reaches the target value and the pitch angle adjustment is stopped after the variable pitch propeller 1 reaches the target value.

In this way, three-stage propeller pitch angles can be adjusted stepwise by experience, which is suitable for navigation, preliminary and double-wing operations.

In addition, in the present invention, a function for preventing side effects due to a sudden propeller pitch angle change is provided to the pitch controller 3, wherein the pitch angle increasing switch 9 and the pitch angle reducing switch 10 of the remote control means 5 are provided. When the variable pitch propeller 1 is in operation by pre-operating any of the switches, the continuous operation of the switch is prohibited, and only the return operation of the variable pitch propeller 1 by the remaining switches is possible.

Reference numeral 7 denotes an engine speed controller, and 8 denotes an engine speed controller.

As described above, the present invention determines three-stage sections in which the pitch angle of propellers is practically required, such as sailing, prehistoric and double-wing operations in a trawler, and by the pitch controller 3 when the remote control means 5 is operated. The variable pitch propeller 1 is adjusted to the propeller pitch angle, making the adjustment work very easy, and the pitch angle indicator 4, which is a high sensitivity potentiometer voltage detection method, enables continuous detection of the propeller pitch angle. In the event of a malfunction in the propeller adjuster 2 or the like, it is quickly found and can be readjusted or repaired by the remote control means 5.

In addition, during operation of the variable pitch propeller (1), the propeller pitch conversion to the next step in the same direction as the operation direction is prevented, and only the restoration in the opposite direction is possible to prevent side effects due to a sudden change in the propeller pitch angle, Compared with the conventional apparatus in which the propeller pitch angle is servo-adjusted with respect to the engine speed, the manufacturing cost is excellent.

Claims (3)

In the propeller pitch automatic adjustment method of operating the propeller pitch remote control means (5), the pitch controller (3) operates the propeller adjusting tool (2) connected to the variable pitch propeller (1) to change the pitch angle of the propeller. When the switch of the adjusting means 5 is operated, a pitch value set in advance in the pitch controller 3 connected to the pitch angle indicator 4 and the input value from the pitch angle indicator 4 will be matched with each other. Automatically adjusting the propeller pitch for trawlers, characterized in that the pitch angle of the variable pitch propeller (1) is adjusted stepwise by operating the propeller adjusting tool (2). 4. The variable pitch propeller (1) according to claim 3, wherein the remote control means (5) comprises a pitch angle increase switch (9) and a pitch angle decrease switch (10), but by operating the switches (9, 10). The propeller pitch automatic adjustment method characterized in that the increase or decrease by one step. The variable pitch propeller (1) according to claim 1 or 2, wherein the variable pitch propeller (1) is operated by pre-operating one of the pitch angle increasing switch (9) and the pitch angle decreasing switch (10) of the remote control means (5). The continuous operation of the switch is prohibited, and only the return operation of the propeller (1) by the remaining switches is possible.