A starting protection method for a marine diesel engine

Abstract

The invention discloses a starting protection method for a marine diesel engine, which belongs to the field of diesel engines. The starting protection method for a marine diesel engine can protect the starter of a diesel engine from being powered by a large current for a long time, effectively avoiding the situation that the starter is heated, burnt out or damaged, and It can effectively protect the starter from gearing due to the second start, and at the same time, by merging the pre-supply process into the starting process, the process of starting the marine diesel engine is simplified, and the diesel engine is started only after the diesel engine is fully lubricated, and an emergency start button is added. (SB2), the starting protection contact is connected in series in the starting circuit, that is, when the starting button or the starting relay fails, it can start normally. It makes the situation that the conduction of the circuit becomes worse due to oxidation, and then effectively improves the sensitivity of the entire starting protection logic control unit, so that the starting protection effect for the diesel engine is achieved.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a starting protection method for a marine diesel engine. Background technique [0002] Marine diesel engines have high thermal efficiency, good economy, easy starting, and great adaptability to various ships. They were used as propulsion power for ships soon after they came out. By the 1950s, diesel engines had almost completely replaced steam engines in newly built ships. Marine diesel engines have been the main power for civilian ships, small and medium-sized ships and conventional submarines. Marine diesel engines can be divided into main engine and auxiliary engine according to their role in the ship. The main engine is used as the propulsion power of the ship, and the auxiliary engine is used to drive the generator, air compressor or water pump, etc. [0003] Marine diesel engines are generally divided into high-speed, medium-speed and low-speed diesel engines. The main perf...

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Problems solved by technology

[0006] In the existing technology, the pre-supply process and the starting process are operated separately. If the user directly starts the diesel engine without pre-supplying lubricating oil in order to save trouble, it will have an impact on the life of the diesel engine, and most of them consider limiting the length of the starting time. Use a single method such as adding a time relay to limit the starting time, without considering the problem of the second start of the gear. The general method is to start the delay after the start button is released. If the delay is 5s, if the diesel engine does not stop completely after 5s. Stable, at this time the second start will inevitably hit the gear, and at the same time when the logic controller is used for start protection, only one start button is left, and it is not considered that the diesel engine cannot be started in case the start button fails or the start relay fails. Very scary for ships

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