SU787266A1 - System for controlling ship's main engine and variable-pitch propeller screw - Google Patents

Description

This invention relates to the automation of shipboard propulsion systems. A known control system for the main motor and the screw of the adjustable pitch, comprising a block for setting operating modes, connected via a program block, a load controller, a switch connected by one of the inputs directly to the output of the block for setting modes, and an actuator of the adjustable pitch screw with a change mechanism the pitch of the screw with the pitch sensor and through the engine actuator with the engine speed regulator equipped with a load sensor, the output of which is connected to one of the inputs of the load regulator 1. However, this system does not provide operation of the plant in optimal modes and power plant operation required. A control system for the ship’s main engine and the pitch control screw, which contains blocks of operation modes, connected to a software device, the first output of which is connected, is also known. load, the other input of which is connected to the load sensor of the main engine, equipped with an all-regulator, and the output to one of the inputs of the comparison unit, the other input to is connected to the screw pitch sensor, and the switch, the output of which is connected to the screw pitch change actuator 2. Dunn, the system provides reliable separate control of the main engine rpm and the adjustable pitch screw and protects the engine against overload, but does not ensure that the power plant works on all forward driving modes. The purpose of the invention is to increase the efficiency of the power plant in all modes of forward travel. This goal is achieved by the fact that the program device system consists of low-load installation programs, connected to its input of the unit, low-load installation economical operation, engine rotational frequency control optimum setting and low-output installation programs connected to its output, engine protection pro- gramming unit the program switch block, as well as the program select block, the inputs of which are connected to the outputs of the program blocks of the economical operation and the barrier characteristic of the engine, and you the course of the program selection block is connected to the first output of the software device, while the outputs of the program switching block and the program block of low-load installation economical operation are connected respectively to the third and third outputs of the software device and connected to the first and second inputs of the switch, the third input of which is connected to the output block comparison.

The drawing shows the functional scheme of the control system of the ship's main engine and variable pitch propeller.

The system contains a mode setting unit 1, connected to a software device, the grade of which includes an engine speed control unit 2 of the optimum engine 3, a program unit 4 for low-load economical operation programs connected to the output of block 2, an economical operation unit installation unit 5, the block 6 programs of the barrage characteristic of the engine 3 and the program switching unit 7, as well as the program selection block 8 connected by their inputs with the outputs of the blocks 5 and b, and its output is the first output of the program set The device is connected to one of the inputs of the load regulator 9, the second input of which is connected to the sensor 10 of the load of the engine 3, equipped with an all-mode regulator 11 connected to the actuator 12, the input of which is connected to the output of the unit 2.

The output of the controller 9 is connected to one of the inputs of the comparison unit 13, to the other input of which the sensor 14 is connected to the screw 15 with the mechanism 16 for changing the step associated with its actuator 17, the input of which is connected to the output of the switch 18 whose inputs are connected respectively to block outputs; pb 4, 7 and 13.

The system works as follows.

When acting on the unit 1, the assignment of operating modes generates a command signal to the unit 2 of the optimum programs for controlling the engine speed and unit 4 of the programs for economical operation of the installation at low loads.

When the operator sets the mode corresponding to the small load of the power plant, unit 2 generates a constant signal at its output equal to, for example, idle speed. At the same time, the actuator 12 acts on the all-mode engine regulator 11. 3, which maintains the engine rpm constant. At the same time, unit 4 generates on its output a signal that passes through the switch 18 to the actuator 17 and sets the controls of the pitch change mechanism 16 to position

When setting the operator mode,

0 corresponding to the load of the power plant is slightly larger than the engine can develop at idle speed with the screw maximum solution, unit 7 produces

5 is a discrete signal by which the switch 18 connects to the actuator 17 the output of the block 13. Simultaneously, the all-mode controller 11 is tuned, as the actuator 12 receives

0 from block 2 task. In this case, the regulator 9 receives a signal from the sensor 10, and through block 8 of program selection, a signal from block 5 of programs for economical operation of the installation.

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For these two signals, the regulator 9 controls the pitch of the screw 15 in such a way as to ensure the safety of the power plant load control program. With

In this, in the zone of low loads, the load on the engine 3 changes only due to a change in the engine rotation frequency at the maximum spacing of the propeller pitch, and at another

In the program section, the change in the engine load is carried out both by changing the frequency of rotation of the engine 3 and by changing the solution of the pitch of the screw 15.

Installation management on large

The loads are produced in a similar manner at the corresponding section of the progrgmmmy due to the simultaneous change of the engine rotational speed and the pitch of the screw.

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If the operator sets a mode that exceeds the barrier characteristic of the engine, the program selection block 8 connects to the load controller 9 the output of the block 6 of the program 0, which prevents the engine from overloading.

In order to accelerate the output of the setpoint to a predetermined mode, the block 13 of the wiggout pitch 14 is provided for. At the same time, since load controllers are usually used as integral, the insertion of the gauge 14 provides, with a slight change in the output of the load regulator 9, movement of the propeller blades 15 at the speed provided by the screw pitch change mechanism 16.

Thus, the power plant is controlled by

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Claims (1)

The claims 10 A control system for the ship’s main engine and adjustable-pitch propeller, containing a unit for setting operating modes connected to a software device, the first output of which is connected to one of the inputs of the load regulator, the other input of which is connected to the load sensor of the main engine equipped with an all-time power supply. jq controller, and the output is to one of the inputs of the comparison unit, the other input of which is connected to the screw pitch sensor, and the switch, the output of which is connected to the actuator of the screw pitch change, which means that, in order to increase the efficiency of the power plant, the software device of the system consists of a block of programs for economical operation of the installation at low loads connected to its input, a block of an optimal program for controlling the engine speed and a block of programs of economical work connected to its output s of the installation, the program block of the engine blocking characteristic and the program switching block, as well as the program selection flea whose inputs are connected to the outputs of the economic operation program blocks and the blocking engine characteristic, and the output of the program selection block is connected to the first output of the program device, * the program switching unit and the program unit for economical operation of the installation at low loads are connected respectively to the second and third outputs of the software device and connected to the first second inputs of the switch, a third input coupled to an output of the comparator.