An oil collection system includes a boat that has an engine. A pan is removably coupled to the engine such that the pan may capture oil leaked from the engine. A plurality of clips is provided and each of the clips is coupled to the pan. Each of the clips engages the bottom end of the engine such that the pan is removably retained on the engine. A filter is positioned within the pan such that the filter filters the oil. A gauge is coupled to the pan such that the gauge may display an amount of oil contained within the pan. A drain is coupled to the pan such that the drain may selectively drain the oil from the pan.

A propulsion device for the propulsion of a marine vessel includes: a rotatable portion supported by a bearing arrangement with a liquid-lubricated bearing. The rotatable portion has an internal conduit for a liquid for the bearing. The propulsion device transports the liquid for the bearing from a bearing liquid inlet to the internal conduit, and from the internal conduit to a bearing liquid outlet. The bearing liquid outlet is located at a larger radial distance from a rotational axis of the rotatable portion and the rotatable portion has an outlet device with an outlet conduit extending from the internal conduit to the bearing liquid outlet. The outlet device includes a moving part of the bearing, and the outlet conduit extends so as for liquid transported therein to cool the bearing.

Disclosed are a propulsion device for a ship and a ship having same. The propulsion device, according to an embodiment of the present invention, comprises: a rear propeller fixed to a driveshaft; a front propeller positioned in front of the rear propeller, and supported rotably on the driveshaft; and a counter rotation device for reversing and transmitting the rotation of the driveshaft to the front propeller; a motor for rotating the driveshaft; and an housing, which extends from to the lower part of the hull, and which is installed so as to envelope the counter rotation device and the motor.

The lubrication of a steerable thruster of a marine vessel is based on splash-type lubrication at the pod and full bath lubrication in the stembox and in the shank. The lubrication oil enters the pod both from the stembox and the shank via a constriction and directly from the oil tank. The oil is further circulated from the pod to the oil tank by means of pumps.

An oil collection system includes a boat that has an engine. A pan is removably coupled to the engine such that the pan may capture oil leaked from the engine. A plurality of clips is provided and each of the clips is coupled to the pan. Each of the clips engages the bottom end of the engine such that the pan is removably retained on the engine. A filter is positioned within the pan such that the filter filters the oil. A gauge is coupled to the pan such that the gauge may display an amount of oil contained within the pan. A drain is coupled to the pan such that the drain may selectively drain the oil from the pan.

A rotating shaft is formed in a hollow shape with lubrication oil conducted inside, a lubrication oil auxiliary plate is provided on the rotating shaft, and a lubrication oil passage to the lubrication oil auxiliary plate is formed from a center of the rotating shaft.

An outboard engine includes a steering mechanism having a pod propulsion device disposed in water outside a hull; a propulsive drive mechanism that is disposed in the hull and gives a propulsive drive force to the pod propulsion device; and a circulation cooling circuit which has an outward flow path that supplies a cooling oil to the steering mechanism and the propulsive drive mechanism, and an inward flow path which recovers the cooling oil from the steering mechanism and the propulsive drive mechanism, in which the inward flow path and the outward flow path of the circulation cooling circuit communicate with each other inside a case body of the pod propulsion device.

A boat propulsion device includes an engine, an oil pan to store oil to be supplied to the engine, a case to accommodate at least a portion of the oil pan, and a pump to pump cooling water to a cooling water flow path in the boat propulsion device. The cooling water flow path includes a first flow path between the oil pan, the case, and the engine, and a second flow path branching from the first flow path at a location between the oil pan and the case and not extending to the engine. The boat propulsion device further includes a flow rate regulator to change at least one of a flow rate of the cooling water flowing into the first flow path and a flow rate of the cooling water flowing out of the first flow path.

A lubricating oil purification system for purifying a stock solution mixed with ammonia water into lubricating oil, the lubricating oil purification system includes: an engine; a lubricating oil purifier configured to separate a stock solution containing the lubricating oil used in the engine into a light liquid which is at least the purified lubricating oil and a heavy liquid containing ammonia; and a water supply unit configured to supply water into a separation chamber during operation of the lubricating oil purifier.

Provided is a method for adjusting lubrication optimization of a marine main engine cylinder based on computer vision, and belongs to the technical field of marine power systems. The method includes: establishing a marine main engine lubrication database for cylinder lubrication analysis and quality evaluation; collecting cylinder lubrication data of each current cylinder, and preprocessing cylinder lubrication image set data; performing image segmentation and cluster analysis on the preprocessed cylinder lubrication image set, and comparing the preprocessed cylinder lubrication image set with the marine main engine lubrication database to obtain feature recognition results of carbon deposition, dirts, scratches and a wear degree; and according to the feature recognition results, evaluating a cylinder lubrication quality to obtain evaluation grades, and adjusting cylinder lubrication optimization according to the evaluation grades.