导论论文（Introduction to the paper）

导论论文（Introduction to the paper） 导论论文(Introduction to the paper) ASDXSADasdasdqsfasdasdfasdfasdfasdfsdfasdfasdasdasdas characteristics of the internal combustion engine, the fuel in the combustion in cylinder, gas generated by the direct drive piston work. Let's take the example of the gasoline engine as an example. At first, the piston moves downward, the inlet valve opens, the exhaust valve closes, and the mixture of gasoline and air enters the cylinder. When the piston reaches the lowest position, change the direction of motion and move upward, when the exhaust valve is closed and the gas in the cylinder is compressed. The compression ends and the spark plugs ignite the fuel gas. The gas generated by fuel combustion expands in the cylinder, pushing the piston down to work. When the piston goes up again, the air inlet valve is closed, the exhaust valve opens and the flue gas discharge into the atmosphere after work. Repeat the above compression, combustion, expansion, exhaust and other processes, cycle, and continuously convert the chemical energy of the fuel into heat energy, which can then be converted into mechanical energy Internal combustion engine is a kind of engine that directly inputs a liquid or gas fuel into the air, and directly inputs the Internal combustion of the machine to produce heat energy and then converts it into mechanical energy. The internal combustion engine has the characteristics of small volume, small quality, easy movement, high thermal efficiency and good starting performance. But the internal combustion engine USES petroleum fuel in general, and the exhaust gas contains high content of harmful gases. Marine engineering is the ship engine room and electric power automation equipment maintenance and management of specific ships are sailing is responsible for the main diesel engine, generator diesel engine, ship power station, steering gear, windlass, mooring winch, winch, Marine air conditioning, refrigerator, boiler, oil processing equipment, system weak waiting for, and so on equipment daily maintenance, monitoring, repair, etc. The Marine engineering project of wuhan university of technology is the real water major, and the land is called energy power and automation. Study courses or similar, but the Marine engineering to take an examination of the sea (only three, other place seven door) to graduate, even if you don't ship, development space is very big, is also very good looking for work, as long as you can finish on time, will have a place to you Introduction to Marine engineering After learning of the introduction to Marine engineering, has a preliminary understanding on the part of a wheel of mechanic process (lu) designed industry relating to some specialized knowledge theory, the experiment principle and professional obtain employment direction, more important is to understand the Marine engineering in the future to learn professional knowledge and the technology needed to. Marine engineering (land) training goal is to cultivate moral, intellectual, physical all-round development, grasp the special Marine engineering industry (lu) on the basic theory and skills, can ship at the enterprises and institutions engaged in ship power equipment design, manufacturing, test, research and management of senior engineering and technical personnel. I have been studying for four years. Main courses are drawing, machine structure design basis, engineering mechanics, engineering materials, with strength and hydraulic transmission, engineering thermodynamics and heat transfer, high level language program design, power electronic technology, swap and measuring technology, the ships to principle, the dynamic control principle, ships diesel engine, ships auxiliary machinery, ships, ships, power plant power plant installation process, ships, ships, electrical power plant automatic control, technology of the machine maintenance, such as turbine specialized English of a comprehensive strong engineering background. Wheel mechanic process (lu) is the real Marine power engineering, is in charge of the power unit and its auxiliary power that ship assembly manufacturing research and development of professional, if the comparison of a ship into a house, special wheel mechanic process (lu) industry like interior management and equipment maintenance and manufacturing designer a sample. In general, it is said that the wheelset industry is the main business of ship operation, the design and manufacture and maintenance of the ship's dynamic loading and the ship's auxiliaries. Of ship power plant is in order to ensure the ship set up by the normal operation of power equipment, is to provide a variety of energy and use these to ship, in order to ensure the normal navigation of ships, one member of a normal life, into various assignments. Ship's dynamic loading is an important part of the ship, which is equipped with all kinds of energy production, transmission and consumption. The ship power plant consists of three main parts: main power unit, auxiliary power plant, other auxiliary machinery and equipment. Main power device is the ship's host is also called the propulsion system, is to provide ship propulsion, confirmed the ship to a certain speed of all kinds of machinery and equipment, including host and its ancillary equipment, the heart of the whole ship. The bag is the main dynamic loading package including the main machine, transmission set, shafting, push and so on. When the main machine is activated, the drive transmission set and shafting can be used to make the pushing machine work. When pushed into a device, it is usually a spiral propeller, which can cause a ship to move forward or backward when it spins in the water. The main driving force is equipped with the main machine type life name, the main want to have the steam engine, steam wheel machine, the fuel oil machine, the combustion air wheel machine and the nuclear dynamic force mount and so on five kinds. Now, the main engine of the ship transport ship is the main engine of the fuel oil machine, which is the best in the quantity. Steam engines have been used in the history of the ship's development, but the first few of them have been completely panned. The steam turbine has a long time in the large work load, but it is also the generation of the fuel oil machine. The gas turbine and the nuclear dynamic load are only used for a few ships. Considering from the economic cost of diesel engine as the host of ships will still is the mainstream of the future, but from the green party to consider the present Marine diesel engine technology greatly improved, make the diesel engine more rings. Auxiliary power unit is used to provide all kinds of energy, other than the propulsion system for ship navigation, industry and living needs of devices, including to provide ship's electric power, according to Ming and other power devices, such as generator, boiler, etc. The generator group is the most important auxiliary power mount on the ship. The steam turbine is powered by a steam engine (sometimes driven by a small turbine) but with a smaller capacity for lighting and electricity. On the steam-wheel machine, the generator group is driven by the steam-wheel machine to provide the power supply for the whole ship. The large part of the steam turbine generator group has been listed. The volume of capacitance can range from 0, 0, 0, 000 watts to 2, 5, 0, 0, 000 tiles, which can be selected by itself. There are two or three generator groups on the oil jet, which can be driven by a single single-set medium or high speed fuel oil machine. The volume is determined according to the number of the equipment for the whole ship's electrodynamic machine, and it is used for the power of 4 0 0 volt 3 phase alternating current, and the frequency rate is 50 hz and 60 hz. The auxiliary boiler is used for stopping at the steam steamer and steam steamer, for heating and heating when the vessel is on board. The combustion of the auxiliary boiler on the oil tanker can be used as fuel oil, or as the waste gas discharged from the fuel oil machine can be used to produce steam steam from the boiler. Besides generating set and the auxiliary boiler, driven by in modern hydraulic mechanical equipment on board the ship need, also is equipped with hydraulic power plant, the main components for hydraulic pump, motor or diesel engine driven separately. Marine auxiliaries, including Marine pumps, pipe and accessories, oil purifier and other auxiliary machinery and equipment Ship building water unit, air compressor, Marine auxiliary boiler, ship refrigeration and air conditioning, windlass, winch, ships and so on a series of steering gear and ship shafting mechanical to form a sea ship internal independent system, needs to ensure that put on personnel and daily life. A Marine pump is a machine that changes the pressure or conveying fluid of a fluid in a ship. Can according to the working principle is divided into a lot of classes, including (1) positive displacement pump movement caused by working parts working volume increase periodically and narrow row liquid absorption, and by working parts of the extrusion and direct the liquid pressure will increase. According to the movement mode of moving parts, it is divided into two categories: compound pump and rotary pump. According to the structure of the moving parts, the piston pump and plunger pump have gear pump, screw pump, vane pump and water ring pump. 2. Impeller pump impeller pump is driven by the blade wheel to drive the liquid high speed and transfer the mechanical energy to the transported liquid. According to the structural characteristics of pump impeller and the flow of different impeller type can be divided into: 1) the centrifugal pump (c e n a l p u mp trifu g) (2) the shipping line and accessories Shipping line is used to connect all kinds of mechanical equipment in ships pipe, used to transport water, oil, gas and other relevant working medium. There are two main types of ship pipeline: dynamic pipe and ship system. The dynamic tube road is used for the main machine and the auxiliary machinery service each kind of tube road, has the oil, the oil, the cold but water, the compressed air, the exhaust gas, waste heat and so on. The ship's ship system is for the stability and stability of the ship's ship, and it is necessary for the regular life of the full and the passengers. There is a large number of ship systems, and there is a water supply system for the whole ship for sea water and light water. The ballast water system for the ship load of the regulating vessels; To discharge the system of bilge water from the bottom of the tank; A compressed air system for compressed air for the whole ship; Fire fighting system for fire extinguishing, etc. Most of the equipment used in these systems, such as pumps and compressors, are electrically operated and automatically controlled. (3) the oil-water separator is will leave to instruments, oil and water in the sea on the ship oil-water is purification device, Marine environment protection committee according to the international maritime organization subordinates in 2 00 3 years on July 1. 8 passed IM o. P M E c. should discuss case 1 0, 7, 9 (4). The decision of the "M A RP O L 7 3/7 8 anti-fouling public covenant" and the "I have the YWC type 15ppm tank bottom oil water splitter" is A new request. About this Marine oil-water separator can be on the ship contains a variety of fuel oil, high dense degree of residual residue and composed of ferric oxide, table surface active agent and so on configuration of bilge water emulsion mixture for effective treatment to minimizing pollution to the environment. A ship's water - making device is a water desalination plant for daily life. The ship's steering gear is a control device on the sea, which is used to control the ship's heading and the line of the ship, and the machinery for the anchor and anchor chain. Use human, steam engine, motor, hydraulic maeda as the motivation. It is usually installed on the deck of the ship. The development trend is to use a unit to realize anchor, mooring, self-moving mooring and cable. According to the driving form can be divided into: manual, electric, hydraulic, hydraulic windlass also called electro-hydraulic windlass, It drives the oil pump with electric motor, drives the motor with high pressure oil, and then drives the transmission gear with the reducer (also not the speed reducer), which makes the anchor machine run, and its structure is compact and small. Automatic hydraulic windlass has been developed. It has the chain length sensor, which will automatically stop when the anchor chain that needs to be thrown is thrown out. When the anchor is close to the anchor, it can automatically slow down; The anchor will automatically stop when it enters the anchor chain. A series of shipboard equipment is set up for the purpose of ensuring the safety and reliability of ships in the sea. According to the ship's use, different ships are divided into different categories, which include cruise liner, ship, oil wheel, ferry, tug wheel, chemical wheel, weight boat, etc. However, in the different sea regions of different types of vessels, it is noted that in the case of the sea domain, the ship type of a certain type of ship is determined by the sea domain. Panamax, also known as the P - c la s s level refers to the ship width less than 3 2. 2 meters, can safely with all kinds of ships through the panama canal, the captain defined in 1 8 0 m - 2 8 0 m, deadweight tonnage between 20000-1 20000. Capesize also known as a PE type C, generally refers to bulk carrier, is refers to the resistance to the cape of good hope bad storm capesize ships, general this type of captain in the 2 0 0 3 0 0 m, 2 5-4 0 meters wide degree, deadweight tonnage is more than 150000 tons. There is the suishi river type, which refers to the super - grade oil wheel or diverter wheel, which is larger than 20 meters in water. It is also the type of ship with a large size of 300 meters and a weight ton of more than 250, 000 tons. The ultra suishi type, which means that there is no such thing as the superclass sea, the suishiyun river, is not full of such ships, but the same kind of Ex oil wheel, which weighs a ton of 300 thousand tons. And our wheel mechanic process (lu) will work to obtain employment direction is mainly to the shipyard, take an examination of the customs civil servants, to register for ship design work, also can to machinery factory, send power plant and so on many companies to obtain employment, but is the main direction of employment, or to work in shipyard, from shipping maintenance manufacturing and design work. While working in the environment depends on the position, it is also slowly recovering with the economic recovery of the tongsu building industry. Although the work environment is hard, the employment is relatively objective.