轮机工程导论论文（Introduction to marine engineering）

轮机工程导论 论文 政研论文下载论文大学下载论文大学下载关于长拳的论文浙大论文封面下载 （Introduction to marine engineering） 轮机工程导论论文(Introduction to marine engineering) The working characteristics of internal combustion engine, the fuel combustion in the cylinder, the gas produced by pushing the piston to do work. Below, the icon of the gasoline engine as an example. To start, the piston moves down, the intake valve opens, the exhaust valve is closed, the mixture of gasoline and air into the cylinder. When the piston reaches the lowest position, the change in the direction of motion and the upward movement, then into the exhaust valve closed by the compressed gas cylinder. Compression end, electric spark plugs ignite the fuel gas. The gas produced by fuel combustion in the cylinder expansion, piston and push down work. When the piston moves upward again when the inlet valve is closed, the exhaust valve is opened, the smoke exhaust system to the atmosphere. Repeat the above compression, combustion, expansion, exhaust and so on, the cycle will continue to fuel chemical energy into heat, and then converted into mechanical energy The internal combustion engine (Internal combustion engine) is the air mixed with liquid or gaseous fuels, directly into the machine internal combustion to generate heat energy is converted into mechanical energy of a heat engine. The internal combustion engine has the advantages of small volume, small weight, easy to move, high thermal efficiency, good starting performance characteristics. But the general use of fuel oil internal combustion engine, with high content of harmful gas and exhaust gas. The maintenance and management of marine engineering is the ship engine room and electric power automation equipment, which is responsible for the ship main engine at sea, diesel engine, ship power station, steering gear, windlass, mooring winch, crane, ship air conditioning, refrigerator, boiler, oil processing equipment, daily maintenance, equipment monitoring system for light and so on repair work, etc.. This is the Wuhan University of Technology marine engineering, is worthy of the name of the water, the land is called energy power and automation. The courses are still the same, but the marine engineering to pass hicend (only test three, test seven elsewhere) to graduate, even if not on board, but also a great space for development, work is also very good looking, as long as you can graduate on time, there are places to you The introduction summarizes the Marine Engineering Marine Engineering Introduction to learning, have a preliminary understanding of the part of Marine Engineering (onshore) some professional involved in the theory of knowledge, the employment direction of the experimental principle and professional, more important is to understand the professional knowledge of marine engineering to study and technology needs. Marine Engineering (onshore) educational objective is to cultivate all-round development of virtue, wisdom, body, master of Marine Engineering (land) of the basic theory and skills to senior engineering and technical personnel, engaged in the design of marine power plant units involved in ship manufacturing, testing, research and management. Four years of undergraduate schooling.The main course of organic structure drawing, mechanism design, basic engineering mechanics, engineering materials, fluid mechanics and hydraulic transmission, engineering thermodynamics and heat transfer, the high-level language program design, electrical and electronic technology, interchangeability and measurement technology, automatic control principle, principle of the ship, the ship diesel engine, ship, ship power plant, ship power equipment installation process, ship power plant automatic control, marine electrical, ship machine maintenance technology, marine engineering English etc. a comprehensive engineering specialty. Marine Engineering (onshore) is actually the ship power engineering, marine power that is in charge of the ship power plant and auxiliary assembly manufacturing professional R & D, if a ship like a house, marine engineering (onshore) professional management is like interior decoration and equipment maintenance and manufacturing of the designer. General marine engineering is marine power engineering, design director of marine power plant and ship auxiliary machinery manufacturing and maintenance. The marine power plant is to ensure the normal operation of the ship and the establishment of the power equipment, is to provide a variety of energy and energy for the use of these ships, in order to ensure the normal navigation of the ship personnel, normal life, complete all kinds of work. Marine power plant is a variety of energy generation, transmission and consumption of all machinery and equipment, it is an important part of the ship. Marine power plant consists of three main parts: the main power plant, auxiliary power unit, and other auxiliary equipment. The active force device is also known as ship propulsion device is provided for ship propulsion ship, to ensure all kinds of machinery and equipment at a certain speed, the host computer and ancillary equipment, the heart of the whole ship. Package is the driving force device comprises a main frame, transmission device, propeller shafting, etc.. When starting the engine, can drive equipment and propeller shaft, the. When the propeller is usually the propeller, the ship can move forward or backward in the water rotation. The active force device named after the host type, the main steam engine, steam turbine, diesel engine, gas turbine and nuclear power plant five. The modern transport ship host with diesel engine, absolute advantage in quantity. The steam engine was used in the ship history played an important role, but now almost all be eliminated. The turbine has an advantage in high power on the ship, but also increasingly replaced for diesel engine. Gas turbines and nuclear power plants have been tried only by a small number of ships and have not yet been popularized. Because of considering the economic cost of the ship diesel engine as the host will still be the mainstream of the future, but to consider from the direction of environmental protection technology of marine diesel engine are improved greatly, makes the diesel engine more environmental protection. The auxiliary power unit is used to provide a variety of energy except the propulsion device outside the device for ships sailing, working and living needs, including power, lighting and other equipment to provide power for the whole ship, such as generator, boiler etc.. The generator set is the most important auxiliary power unit on board. A generator on a ship, driven by a steam engine (sometimes driven by a small steam turbine), but smaller in capacity for lighting and power. On a steam turbine ship, the generator is driven by a steam turbine to provide power for the whole ship's electrical equipment. Most of the turbo generator units have been serialized, with capacities ranging from 500 kW to 2500 kW, and are free to choose. On the diesel engine ship, there are 2~3 generating sets, driven by a separate medium speed or high speed diesel engine. Capacity of the whole ship according to the number of electrical machinery equipment, the general use of 400 Volts three-phase AC, frequency of 50 Hz and 60 Hz two. In the steam ship auxiliary boiler and steam turbine ship is used for parking, in the ship diesel engine for heating and heating with the usual. The fuel on a diesel engine's secondary boiler can be either fuel oil or exhaust gas from the diesel engine to heat the steam generated by the boiler. In addition to turbine and auxiliary boiler, the modern ship hydraulic machinery and equipment driving needs, is also provided with a hydraulic power device, the main components of hydraulic pump, can drive single diesel engine or motor. Marine auxiliary machinery, including independent system of pump, ship piping and accessories, machine oil, and other auxiliary equipment of the ship water making device, air compressor, marine auxiliary boiler, refrigeration and air conditioning, windlass, winch, ship steering and ship shafting and a series of machinery to form a ship inside with the ship, and daily needs to put on staff to ensure life. A marine pump is a machine used to change fluid pressure in a volume or to transport fluid on a ship. According to the working principle can be divided into many categories, including 1. volume type pump by working parts caused by the movement of the volume of work periodically increases and reduced suction of liquid extrusion, and by working directly so that the liquid pressure can increase. According to the different movement of moving parts, it can be divided into two types: reciprocating pump and rotary pump. According to the structure of the moving parts are different: piston pump and piston pump, there are gear pumps, screw pumps, vane pumps and water ring pump. 2. impeller pump impeller pump is driven by the impeller high-speed rotating liquid, and mechanical energy transfer to the delivery of liquid. According to the characteristics of the pump impeller and the flow structure of different impeller can be divided into: (1) c e n Trifu centrifugal pump g a l p u MP) of the ship piping and accessories ship lines are used to connect pipes on ships of various machinery and equipment, used to transport water, oil, gas and other related refrigerants. There are two main types of ship piping: power lines and ship system lines. Power line is used for the host and auxiliary services of various pipelines, fuel, lubricating oil, cooling water, compressed air, exhaust, waste heat and other pipelines. Ship system piping is to improve the stability and stability of the ship, in order to meet the normal needs of the crew and passengers. Ship system, water supply system for the whole ship supply of seawater and freshwater; ballast water system for regulating ballast with pressure; to exclude bilge bilge water discharged by the system; to provide compressed air system using compressed air for the whole ship; for fire extinguishing fire system etc.. Most of the equipment used in these systems, such as pumps and compressors, are electric and can be automatically controlled. The oil-water separator is the oil and water separation equipment, the ship is at sea water purification device, according to the International Maritime Organization under the marine environment protection committee in July 2003 18 by the IM O M E P C. (49) resolution 107. The resolution put forward new requirements for YWC A L 73 /7 8 antifouling Convention on the M 15ppm RP O I bilge water separator. The ship to ship oil-water separator with high density fuel oil, residual oil and emulsion mixture by bilge oxide and surfactant in order to effectively dispose of environmental pollution to a minimum. The water making device of ship, that is ship water desalination equipment, is used to make the water making machine for daily life. The ship steering control device is the ship in the sea, is used for retracting anchor and chain mechanical device used to control the ship anchor machine ship ship heading and path. Use manpower, steam engine, motor, hydraulic motor as motive power. Usually installed on the forecastle deck of a ship. The trend of its development is to achieve operation, anchor mooring, mooring and automatic mooring for a unit. According to the drive form can be divided into: manual, electric, hydraulic, hydraulic anchor machine, also called electric hydraulic anchor machine, It is driven by motor pump, high pressure oil through the drive motor, speed reducer (also no reducer) drives the drive gear, make the anchor machine operation, the structure is compact, small size. Now the automatic hydraulic windlass, it is provided with a chain length sensor, when the required anchor thrown at anchor all thrown, the anchor machine will automatically stop when the anchor in the anchor; to be close to hawsepipe, can automatically slow down; will automatically stop anchor into the hawsepipe receipt when. A series of ship and so on mechanical equipment is composed of a mechanical system for ship, to ensure the safety and reliability of the ship in the sea. According to the different uses of the ship are divided into different categories, divided into the cruise ship, ship, oil carrier, ferry, tug, chemical wheel, crane and so on various types of ship. But because of the various types of navigation in different areas, so sometimes in order to facilitate memory requirements to define a ship to sea. Panama is also known as the P -c La s s, refers to the width of less than 32.2 meters, with all kinds of ship safety in the Panama Canal, the captain defined in 180 m -2 80 m, between 20 thousand and 0 tons of -1 million. Cape of Good Hope is also known as C a PE, in particular to general cargo ship, the ship is super large bulk can resist the bad storm in Cape of Good Hope, this type of general captain in the 200 -3 25 -4 00 meters, width 0 meters, more than 150 thousand tons deadweight tons. The Suez canal, to draft more than 20 meters super tanker or bulk carrier, or the type of ship captain is usually greater than 300 meters, more than 250 thousand tons deadweight tons. Suez, is a super giant sea, the Suez canal, drinking water can not meet such a ship, that is generally greater than 300 thousand DWT Ex tanker. US Marine Engineering (onshore) is the future direction of employment work to the shipyard, the customs examination of civil servants, to society for ship design work, but also to the machinery factory, power plant and so many enterprises to employment, but the main employment direction is to the shipyard to work in maintenance, manufacturing and design etc. the work of shipping. The working environment would be determined depending on the position, but with the economic recovery in the shipbuilding industry also slowly recover, although the working environment is hard but employment is more objective.