Crosshead-shaped large uniflow-type dual-stroke diesel engine
A diesel engine, single-flow technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve expensive problems and achieve the effect of cost reduction and hydraulic power demand reduction
Active Publication Date: 2011-11-23
曼能解决方案(曼能解决方案德国股份公司)分公司
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Problems solved by technology
In practice, this means that it is cheaper to build the largest of these engines with piston diameters exceeding about 90 cm using electronically controlled fuel injection and exhaust systems, but the smaller of these engines with piston diameters of less than about 60 cm are less expensive to build Electric fuel injection and exhaust valve actuation systems are much more expensive than camshaft operated engines
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[0058] figure 1 and figure 2 A sectional view of the engine 1 according to the preferred embodiment of the present invention viewed from the engine front and one cylinder viewed from the engine side is shown. The engine 1 is a single-flow low-speed two-stroke crosshead diesel engine of the crosshead type. The engine 1 may be a propulsion engine in a ship or a prime mover in a power plant. These engines typically have 3 to 14 in-line cylinders. The engine 1 is built from a base plate 2 with main bearings for a crankshaft 3 .
[0059] Crankshaft 3 is of the semi-combined type. The semi-combined crankshaft is made of forged or cast steel bellcrank throws connected to the main journal by a shrink fit connection.
[0060] The base plate 2 can be made in one piece or divided into appropriately sized parts according to the production facility. The base plate is constructed of welded cross members with cast steel bearing supports and tall welded stringers - optionally the base ...
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The invention relates to a crosshead-shaped large uniflow-type dual-stroke diesel engine which is provided with a plurality of air cylinders, and each of the cylinder is provided with at least one exhaust valve and one or more fuel injectors; the fuel injection is performed under the influence of a high-pressure fluid source; potential energy is accumulated by compression in a container of the high-pressure fluid; electro-hydraulic valves control the fuel injection which is primarily driven by energy accumulated in a high pressure container; the engine is provided with a camshaft for actuation of the exhaust valves; hydraulic piston pumps are driven by the cams on the camshaft; and hydraulic actuators move the exhaust valves in the opening direction with hydraulic fluid received via conduits from the hydraulic piston pumps.
Description
[0001] This application is a divisional application of Chinese Invention Patent Application No. 200680054192.8 entitled "Crosshead Large Single Flow Two-stroke Diesel Engine" with an international filing date of April 12, 2006. technical field [0002] The present invention relates to a large low-speed single-flow two-stroke diesel engine of the crosshead type, and in particular to engine components related to fuel injection and exhaust valve actuation. Background technique [0003] Large two-stroke diesel engines of the crosshead type are commonly used for ship propulsion and as prime movers in power plants. Not only because of their huge size, but also the structure of these combustion engines is different from other combustion engines. The two-stroke principle and the use of heavy fuel oil with a viscosity of up to 700cSt at 50°C (which does not flow at room temperature) put this engine in a class of its own in the engine world. [0004] In many conventional engines of t...
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IPC IPC(8): F02M59/10F02M63/00F01L1/38F01L9/02F01M1/02F02M55/02F02M39/00F01L9/14
Inventor 亨里克·维拉德斯·霍曼·克里斯滕森尼尔斯·维德特费尔特·拉斯穆森约翰内斯·弗拉鲁普
Owner 曼能解决方案(曼能解决方案德国股份公司)分公司