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Difference between standby mode and navigation mode of ship main engine clock

The English name of the car clock is "telegraph"! Tele basically means to transmit information by electricity.

So, how does the car clock mark each speed gear? Let's first understand the meaning of the scale of the car clock panel:

Standby-the main engine is ready for the car; It means that all navigation-related equipment, such as the main engine room, auxiliary machines and air compressors that start the main engine, are already in a state of starting at any time.

Complete the engine-complete the car; There is no need to move the state of the main engine when the ship is moored at the dock or completed anchoring.

Stop stop; When the ship manipulates the main engine in and out of the port or at sea, it will stop temporarily.

Forward-forward; Divided into:

Very slow forward-moving forward at a very small speed; This can't be translated as "slow death" Its meaning is the lowest engine speed that the ship's main engine can start to keep the lowest speed of propeller rotation.

Slow forward-forward one; Half in advance-two in advance; Full speed ahead

According to the speed (throttle) of each gear set by the ship's main engine, move forward one gear, move forward two gears and move forward three gears. The car clock on the modern ship is also marked with "sea speed", that is, the cruising speed at sea. The main engines of domestic large container ships are all imported, and generally the rated sea speed can reach 100 rpm, which belongs to low-speed large-caliber cylinder internal combustion engine, and the power of each cylinder can reach 10000 horsepower. If the ship is half-loaded, the speed of this container ship can reach 24.5 knots or even 26.5 knots!

[Reprinted] Popular Science of Navigation-Do you know the ship clock?

Car clocks on modern ships

The biggest feature of steam engines and internal combustion engines is that they can rotate forward and backward. That is to say, under the control of the air compressor, after the air compressor reversely injects compressed air from the front parking place, the main engine will reverse. This is completely different from the car engine always rotating forward. Reversing corresponds to the preceding vehicle, but the power of the reversing main engine is less than that of the preceding vehicle. The following is the reverse clock sequence:

Reversing;

Slowly retreat; Step back slowly-take a step back; Semi-reversing-reversing two; Back off at full speed.

Due to the shortage of handcart clock, when the bridge is in an emergency or tense situation, if it is necessary to use the car urgently, the captain will pull the handcart clock to forward (backward) three, then pull it to stop, and then pull it to forward (backward) three! This action should be repeated three times in a short time. When the engineer saw that the car clock was commanded by such a bell, the engine room immediately entered a state of emergency. According to the captain's instructions, push the main engine to the highest speed and keep the speed as much as possible until the emergency is over!

No matter how the bridge and engine room transmit the bell signal, the driver and engineer must record the bell time and corresponding speed in the bell record book. The car clock book is represented by shorthand symbols.

Aiming at the shortcomings of the old ship clock, with the development of remote control technology of ship equipment, shipbuilding scientists put forward the computer-controlled ship clock, and gave the software and hardware design scheme. The automobile clock has also changed the function of transmitting information synchronously, but it is directly transmitted to the main engine control system to control the speed or reverse direction of the main engine after the bridge sends out any automobile clock instructions, which completely changes the defects of mechanical transmission and promotes the ship bridge to directly and remotely control the main engine to start, stop, reverse and adjust various throttle speeds, so that the captain and the driver can adjust the motion state of the ship at will. As long as the engine room engineer monitors the working state of the main engine in the centralized control room, he can get rid of the way of watching the car clock control the main engine, and can automatically print the car clock records on the bridge and the engine room at the same time, get rid of the records of the car clock book, reduce the maritime accidents caused by misoperation, and trace the motor train situation in the environment at that time.