SU608704A1

SU608704A1 - Pneumatic system for controlling ship-propelling gear with adjustable-blade propeller

Info

Publication number: SU608704A1
Application number: SU742037560A
Authority: SU
Inventors: Борис Гаврилович Мурашов
Original assignee: Предприятие П/Я Р-6654
Priority date: 1974-06-27
Filing date: 1974-06-27
Publication date: 1978-05-30

Description

1one

Изобретение относитс к области судостроени , в частности - к системам управлени судовыми установками с винтом регулируемого шага.This invention relates to the field of shipbuilding, in particular to shipboard control systems with an adjustable pitch propeller.

Известна система управлени дизельными установками с винтом регулируемого шага, содержаш,а устройство задани шага винта и оборотов двигател , исполнительные механизмы и устройство автомагического регулировани нагрузки дизел по программной зависимости положени привода топливных реек от оборотов, соединенное с соответствующими датчиками 1. Указанна система при быстром наборе нагрузки вследствие инерционности устройства автоматического регулировани вначале допускает перегрузку двигател и лишь потом начинает сбрасывать шаг винта, ликвидиру перегрузку.A known control system for diesel units with an adjustable pitch propeller contains, and the unit for setting the pitch of the propeller and engine revolutions, the actuators and the device for automatic load regulation of the diesel engine according to the programmed dependence of the position of the fuel rails on the revolutions, is indicated by the speed dial load due to the inertia of the automatic control device at first allows the engine to be overloaded and only then begins to reset the w ag screw, eliminate overload.

Известна также система управлени судовой установкой с винтом регулируемого шага , содержаща датчик нагрузки двигател , задатчики оборотов двигател и шага винта, соединенный с исполнительным механизмом винта сумматор, первый и второй входы которого соединены соответственно с задатчиком шага винта и через переключатель с выходом блока регулировани нагрузки двигател . Первый и второй входы блока регулировани нагрузки св заны соответственно с задатчиком оборотов двигател и датчиком нагрузкиAlso known is a shipboard control system with an adjustable pitch screw, comprising an engine load sensor, engine rpm and screw pitch adjusters, connected to an actuator screw mechanism, the first and second inputs of which are connected respectively to the screw pitch adjuster and through a switch to the output of the engine load control unit . The first and second inputs of the load control unit are connected respectively with the engine speed adjuster and the load sensor.

двигател 2. Такое устройство также не обеспечивает предотвращени перегрузки двигател .engine 2. Such a device also does not prevent engine overload.

Целью изобретени вл етс предотвращение перегрузки двигател при увеличении нагрузки . Цель достигаетс тем, что система снабжена пороговыми реле давлени , одно из которых выполнено дифференциальным, и блоком временной задержки, причем выходThe aim of the invention is to prevent engine overload with increasing load. The goal is achieved by the fact that the system is supplied with threshold pressure switches, one of which is made differential, and a time delay unit, with the output

дифференциального реле соединен с третьим входом блока регулировани нагрузки двигател , два его входа подключены к датчику нагрузки двигател : один - непосредственно, а другой - через блок временной задержки, аthe differential relay is connected to the third input of the engine load control unit, its two inputs are connected to the engine load sensor: one directly and the other through a time delay unit, and

его третий вход - к выходу другого порогового реле давлени , вход которого соединен с датчиком нагрузки двигател .its third input is to the output of another threshold pressure switch, the input of which is connected to the engine load sensor.

На чертеже представлена функциональна схема предлагаемой системы.The drawing shows a functional diagram of the proposed system.

Она содержит блок 1 задани с нрограммным механизмом 2, приводимым вручную или дистанционно, задатчик 3 оборотов двигател и задатчик 4 шага винта (на чертеже не показан ).It contains a block of 1 task with a nrogram mechanism 2, manually or remotely driven, a setting unit for 3 engine revolutions and a setting unit for 4 screw steps (not shown in the drawing).

Задатчик 3 св зан с иснолнительным механизмом 5 двигател (на чертеже не показан), снабженным датчиком 6 нагрузки двигател , которым вл етс , например, датчик положени привода топливных реек. Выход датчикаThe setting device 3 is connected with the repair mechanism 5 of the engine (not shown in the drawing), equipped with the engine load sensor 6, which is, for example, the position of the fuel rail drive position. Sensor output

Claims

6 is connected to the input of the engine load control unit 7, to another input of which the unit 8 is connected to the specified set point of the unit 7, for which the speed adjuster or the actual speed sensor (not shown) can be used. The system also contains threshold relays Y and 10 pressure, one of which (10) is differential, and a time delay unit 11. The input of relay 9 and one of the inputs of relay 10 are connected to the output of sensor 6. The other two inputs of relay 10 are connected to the output of relay g and through block 11 to the output of sensor b. The output of the iO relay is connected to the input of block 7 to disconnect the power to this block. The output of block 7 is connected to one of the inputs of switch 12, to the other input of which the screw pitch sensor Ib is connected, and the outputs of block 12 are connected to one of the inputs of adder 14, which is connected by another screw input to the setpoint screw 4, and the output to the actuator 15 screws. The program mechanism 2 provides certain levels of output signals from setters 3 and 4. Each set value of the step and turns corresponds to the engine load determined by the operation mode of the vessel and external conditions. For a diesel unit with an adjustable sushi propeller, there is an optimal load program depending on the speed or speed control setting, at which the fuel consumption per mile is minimum. The target load generally differs from the optimal one and is therefore corrected by block 7, the signal from the output of which is algebraically summed in the adder 14 with the output signal of the setter in 3 steps, bringing the engine load to the optimum one. The unit 12 switches the signal from the sensor 13 connects the output of the unit 7 to the subtractive input of the adder 14 at the forward step and to its summing input at the reverse step. The need for switching is caused by the fact that the zero pitch of the screw corresponds to the output signal of the adder 14, which is between the output signal levels corresponding to the forward and reverse steps, and the same change in the pitch of the screw 7 must correspond to an increase or decrease in the output signal of the block 7 . If, when increasing the load, it exceeds the preset level, and the output signal of the sensor b reaches a value corresponding to the set load equal to, for example, 85% of the nominal, the relay thresholds of 9 and 10 are exceeded and relay 9 supplies the output relay with 10 disables block 7, drive the output signal of the latter to zero. At the same time, the screw actuator is fed through the adder 14 by a signal from setpoint 4 and a step is set at which the diesel engine at nominal speed loads up to the nominal or short-term allowable load in the mooring mode and to smaller loads during the ship's course. After the time determined by the setting of block 11, the difference between the signals at the inputs of the differential relay 10 becomes less than its threshold, the output signal becomes zero and the block 7 is connected. Invention formula Pneumatic control system of the ship unit with an adjustable pitch screw, and the sensor engine load, engine rpm adjusters and screw pitch, connected by an output to the screw actuator, an adder, one and the other inputs of which are connected respectively to the engine adjuster a screw and through a switch with an output of the engine load control unit, one and the other inputs of which are connected respectively to the engine speed control and the engine load sensor, which is designed so that, in order to prevent engine overload when the load increases, it is supplied with threshold a pressure relay, one of which is differential, and a time delay unit, the output of the differential relay connected to the third input of the engine load control unit, and its inputs are connected to the sensor Loading the engine - one directly and the other - through the time delay unit, and its third input - to the output of another pressure threshold switch, whose input is connected to an engine load sensor. Sources of information taken into account in the examination 1. Sweden patent number 180698 in cl. 65F, 12, 1970.

2. USSR author's certificate number 379452, cl. B 63 H 21/22, 1971.