SU796081A2 - Device for protecting ship engine from water flooding through gas exhaust channel - Google Patents

Description

The logical gate And the sensor of the protective parameter of the engine, gfich & l. The first additional logic element AND is connected between the output of the filter and the first input of the third logical element OR, and the second additional logical element AND between the output of the third logical element AND and the second input of the third logical OR, while the sensor protective parameter of the engine is connected to other inputs of the first and second additional logic elements I.

In addition, the protective parameter sensor is implemented in the form of a pressure sensor installed in the engine lubricant & l system; 1I.

On the presented functionality on the proposed device.

At the outlet of the gas exhaust duct of the engine I, a second valve 2 is installed, kinematically connected to the actuator mechanism 3. Mechanism 3 is kinematically connected to limit switches 4 (closed) and 5 (open) positions of the valve to which 151 signal lamps are connected b and 7, respectively.

Sensors 8 and 9 of his work are kinematically connected with the engine t,

performed on tachogenerators with a three-phase output and for monitoring the operation of a diesel engine and are connected to gauges 10 and II. Sensor 8 one of its phase is connected to one of the inputs

the first element 12 Hi and the other two to the inputs of the first element 13 OR and the second element 14 I. Connect the first element 12 AND and the second element t4 AND to the inputs of the second element 15 OR, which is connected through filter 16 and the third element 17 OR with the actuator 3 of the damper 2. The second input of the third element 17 OR is connected with the output of the third ememe-on 18 And whose inputs are connected respectively to the switching element 19 with a power source (not shown) and the output of the second element tS. OR.

Sensor 9 is connected in the same way through elements 2О and 21 И, 22 and 23 OR to filter 16 and element 18

Between the outputs of the filter 16 and the third element. 18 AND and the inputs of the third element 17 OR the additional additional logical elements are installed first 24 AND and second 25 AND, to the other inputs of which the sensor 26 is connected

engine protection parameter, e.g., pressure in the lubrication system.

The proposed device works as follows.

When starting engine I and raising the oil pressure in its lubrication system, signals from sensors 8, 9 and 26 through the logic elements arrive at the input of element 17 OR, the signal from the input of which affects the mechanism 3, the turning damper 2 and the closing limit switch 5, from which the lamp 7 is turned on (the flap is open).

When the engine is normally stopped, the I signals from the input of the 17th element OR are removed, the mechanism 3 closes the gate 2. At the same time, the switch 5 opens, the lamp 7 goes out (the valve is open). The fuser 4 closes, lamp 6 is turned on (the flap is closed).

When opening any of the phases 8 or 9, the signal at the output of the circuit is preserved. So, when one of the phases of the sensor 8 breaks, the signal from the other two phases is supplied by element 14 AND and element 15 OR to the input of element 17 OR and further on. actuator 3. A phase-breaking signal is received by the operator, by measuring the meter Y. The control of the valve 2 when the diesel engine is not operating I is performed by pressing button 19, and a signal is received at the input of element 18 I. In the absence of signals from sensors 8.9 and 26 from the output of element 18 AND a signal is fed to the input of element 17 OR and further to mechanism 3. When element 19 is released, the signal from the output of element 18 is removed.

The filter 16 prevents vibrations of the damper during short-term dips in the frequency of rotation of a diesel engine, which are possible during its launch, reversal, etc.

Claims (2)

When an emergency occurs, such as a pressure drop in the diesel lubrication system, the input of the fourth element 24 And the signal from the engine protection parameter sensor 26 disappears, resulting in a signal at the output of the element 17 OR and the valve 2 is closed by means of an actuator. Due to the inability to operate with a sharply increased backpressure on exhaust fumes, the engine sharply reduces the rotational speed and remains (stalls). This device for protecting the ship's engine from flooding with water through the exhaust gas tract extends the functionality by creating an increased backpressure of the engine exhaust when an emergency condition arises, which contributes to its quickest stop, as well as shortens the time and ensures the increased reliability of the engine emergency stop. Claim I. Invention device for the protection of the ship's engine from flooding with water through the gas exhaust tract according to the author. St. No. 5724OO, characterized in that, with the CSC of shortening the engine stopping time, it is equipped with additional first and second logical EP & A tapes and an engine protection parameter sensor, the first additional logical element AND connected between the output of the filter and the first input of the third logical element OR, and the second additional logical element And - between the output of the third logical element And the second input. the third logical element OR1 while the sensor of the protective parameter of the engine is connected to other inputs of the first and second additional logic elements I. 2. The device according to claim. Tf about tl and chu e e so that the sensor of the protective parameter is made in the form of a sensor of the dulenny, installed in the engine lubrication system. Sources of information taken into account in the examination I. Copyright Certificate SSYUR, № 572400, cl. B 63 H 2t / 34, 1974.