China Generator,Diesel Engine & Gasoline Engine Generator Manufacturer - ETK

Diesel engine has the advantages of high power, good economic performance. The working process of diesel engine and gasoline engine has many of the same place, each working cycle has air intake, compression, power, and exhaust four travel. But as the diesel fuel diesel, its viscosity than gasoline, not easy evaporation, while its autoignition temperature than the gasoline is low, so the combustible mixed gas formation and ignition means are different with gasoline engine. The difference is mainly, diesel engine mixed gas in a cylinder is compression ignition, not lit. Diesel engine work into the cylinder is the air in the cylinder, compressed air to the finish line, the temperature up to 500-700 C, pressure of up to 40 - 50 atm. The piston nears TDC, engine high-pressure pump high pressure to the cylinder injection diesel, diesel oil and forming a fine grain, high temperature and high pressure air mixing, diesel mixed gas to combustion, strong expansion, to generate power, pushes the piston down to work, the temperature can reach 1900-2000 C, pressure up to 60-100 large air pressure, the power is very big, so diesel engines are widely used in large diesel vehicles. Diesel engine in energy saving and carbon emission advantages, is a gasoline engine, all heat engines cannot be replaced, therefore, advanced small high speed diesel engine, its emissions have reached the European III standard, become" green engine", has become Europe and the United States in many new car power device.

And the motor in the slots of the stator core is arranged inside the A, B, C three phase and the number of turns of the coil equivalent coil, rotor slot also has a coil N poles and S poles, when outside DC by the brush, slip ring to pass into the rotor coil in the rotor coil can be generated on the following lines, the lines of magnetic force direction from N to S, generator rotor of steam turbine rotor based on N1 is driven ( 3000 rpm ) rotational speed, the rotor flux is equivalent to N1 in rotational velocity, this process is the stator coil are cut in stator coil generates induced electromotive force ( voltage ), the generator and the outside line connection of load output power, which is the basic principle.Screw type single stage compression air compressor working principle: it is formed by a pair of mutually parallel teeth of male and female rotors ( or screw ) in the cylinder to rotate, so that the rotor slot between the air continuously cyclical changes in volume, air along the rotor axis by the suction side is transported to the output side, realization of screw air compressor suction, compression and exhaust process. Air compressor air inlet and the air outlet are respectively located in the casing are, Yin rotor groove and the male rotor tooth is main drive motor and rotating.Directly driven by motor compressor, crankshaft to generate rotation movement, drives the connecting rod to make the piston do reciprocating movement, cause the cylinder volume change. Since the cylinder pressure changes, through the inlet valve so that the air passes through the air filter ( silencer ) into the cylinder, during a compression stroke of the cylinder volume, due to the narrow, compressed air through the exhaust valve, the exhaust pipe, a one-way valve ( check valve ) into the storage tank, when the exhaust pressure reaches the rated pressure of 0.7MPa by pressure switch control and automatic shutdown. When the tank pressure to 0.5--0.6MPa pressure switch automatic connection to start.

Along with the social economy and technology development progress, municipal water supply system water quality standard to rise stage by stage, water supply ability to increase ceaselessly. In order to meet the requirements of social development, automatic water supply equipment must be toward a certain goal, this goal is a high efficiency and energy saving, no pollution, low noise, convenient operation, reliable operation. Stephen non-negative pressure water supply equipment ( without suction head ) is the target for the design of new water supply equipment.Non negative pressure ( without suction head ) automatic water supply equipment directly to the municipal pipe network of water, forming a continuous closed relay supercharging water supply mode, completely avoid the traditional 2 pressurized water supply system caused by water quality standard is reduced and a variety of water pollution problems, entirely keep the municipal water source water quality national standards; make full use of municipal water pressure potential energy, how fill how many, effectively, to maximize the energy saving effects of variable frequency speed regulation.Product features:1, efficiency energy-saving: make full use of municipal water itself has the pressure potential energy, the number of poor s number, effectively, to maximize the energy saving effects of variable frequency speed regulation;In 2, the net health: a continuous closed pressurization water supply mode, completely maintained the municipal water source to the national water quality health standards, fundamentally avoid the supercharging system caused by water quality standard is reduced and a variety of water pollution;3, eliminate waste: not only eliminated the high level water tank, but also completely cancelled the ground ( underground ) water tank, completely eliminate the water tank overflow, regular cleaning caused by waste water;In 4, low running noise: series of products using the frequency conversion speed regulation scheme, most of the time, especially in the night in the low speed and low noise operation;In 5, the design of the full closed, with buffer action and dynamic compensation water tank ( patent pending), and the current market there is no negative pressure tank, more practical, and the control system is simplified;6, product control system fully summarizes the domestic and foreign companies and variable frequency water supply equipment design and manufacturing experience, uses the standard universal control system technology, can be used for any manufacturers of converter, regulator, PLC and other components, particularly convenient for debugging repair, product life-long after sale service and laid a good foundation, not because of technical progress in after sale service;7, product control system with high intelligence, designed to take full account of the machine, electricity, coordination, with comprehensive detection surveillance and simple and convenient interactive function. With the comprehensive fault protection function and countermeasure, frequency converter fault protection, automatic demotion operation ( become automatic water supply equipment), automatic system fault, also can be manually operated emergency repair time, win;8, can choose various communication interface, protocol, which can be connected with various man-machine interface, a monitoring computer, with a variety of control network, communication network connected, applicable to special, complex operation control and network monitoring requirements. For users supporting the development of monitoring and control software.

Welding principle is: by our common 220V voltage or 380V industrial electricity through the electric welding machine in the reducer reduces the voltage, increasing the current, use electricity to produce the tremendous heat melt steel, welding rod into the steel convergence between higher, and welding electrodes, outer coating on a very big role, does not believe you to knock the powder can not ): welding manual arc welding using welding electrodes, by coating and core is composed of two parts. When welding, welding rod as an electrode, a play the conduction current and firing action of arc, the welding rod and the base metal to produce sustained, stable arc, in order to provide the necessary heat fusion welding. On the other hand, welding electrodes and as a filler metal to weld to weld metal, become the main component of. Therefore, electrode composition and welding quality, will directly affect the chemical composition of weld metal, mechanical and physical properties. In addition, welding rod for the stability of welding process, weld appearance quality, welding productivity also has a great influence. Electrode core is a metal core. In order to guarantee the welding quality, the core of all kinds of metal element content, has the strict stipulation. Especially for the harmful impurities ( such as sulfur, phosphorus) have the strict limit, the core metal quality should be superior to the parent material. No coating rod electrode is not for arc welding. This is because the arc stability is poor, splash, weld forming is not good. After a long practice, gradually found in the core coated with certain mineral raw materials ( i.e. electrodes ), welding properties can be improved greatly.

The new generator or seal the generators by running after ( first 50 hours ), need following maintenance: clean or replace the air filter replacing engine oil replacement or cleaning of the filter element for lubricating oil filter to tighten each portion of the bolt and nut new generator should try to avoid a sudden increase in load or high speed operation, as far as possible the use of manufacturers recommend the use of the lubricating oil, different grades of lubricating oil do not mix, lubricating oil containing different kinds of additives, different grades of lubricating oil after mixing makes lubricating performance decline, leading to the abnormal wear of moving parts. To the fuel tank filling, oiling mouth due filter, filter cloth placed on better fuel in the fuel tank; first standing for more than 24 hours, so that the water and precipitation of impurities after use; usually should often open daily tank drain plug head at the bottom of the water and sediment discharge. Regular maintenance and planned maintenance is the key to prolonging the service life of the engine, maintenance cycle and maintenance projects according to the use, usage and fuel, lubricating oil characters make appropriate adjustment, necessary to advance for maintenance, as far as possible from the professional and technical personnel to complete the regular inspection and maintenance. The quality of imported generating units are often expensive, reasonable use, pay attention to daily maintenance, prevention of early abrasion, prolong its service life, let it keep rapid start and put good preparation machine state, truly turn material resources to good account.

The generator is mainly composed of a stator, a rotor, an end cover. The brush frame and bearing and other parts. The stator consists of a stator iron core, coil winding., and the fixation of these parts of the other structural components. The rotor comprises a rotor iron core, rotor magnetic pole ( a yoke magnetic pole winding. ), slip ring, ( also called copper ring collector ring. ), a fan and a rotating shaft and other components. Through the bearing seat and the end cover, the generator stator, rotor connected together, so that the rotor can rotate in a stator, through a slip ring in certain excitation current, so that the rotor into a rotating magnetic field, the stator coil to cut magnetic force lines, thereby to generate induced electromotive force, led out through a connecting terminal, connected to the circuit, they generate electricity. Because the brush and rotor connected with circuit, allowing the rotor to rotate according to a certain direction, producing an alternating current so the family circuit is an alternating current, referred to as alternating current. China's power output current frequency is 50 hz. Steam generator and steam turbine generator set. In order to get higher efficiency, steam turbine into high-speed, typically 3000 rpm ( frequency 50 Hz ) or 3600 RPM ( frequency 60 Hz ). Nuclear power station steam turbine in low speed, but also in over 1500 turns per minute. High speed turbine generator in order to decrease because of the centrifugal force generated by mechanical stress and reduce the wind abrasion, rotor diameter generally made smaller, larger length, i.e. the elongated rotor. Especially in the 3000 / min or more high speed and large capacity unit, because of the material strength, diameter of rotor was severely restricted, generally can not exceed 1.2 meters. While the rotor body length and subjected to a critical speed limit. When the body length to diameter is more than 6 times, second rotor critical speed is close to the speed of the motor, operation may occur in larger vibration. So the large-scale and high-speed turbine generator rotor size restricted. Around 100000 kilowatts of air-cooled motor the rotor size has reached the limit of size, to increase the capacity of the motor, only by increasing the electromagnetism load to achieve. So we must strengthen the cooling motor. So 5 to 100000 kW generator adopts the cooling effect is good in the hydrogen cooling or water cooling technology. Since 70 time, turbogenerator maximum capacity has reached 130 ~ 1500000 kw. From 1986 since, in a high critical temperature superconducting materials research has made a major breakthrough. Superconducting technology is expected to turbine generator are applied, it will be in the history of the development of turbine generator to produce a new leap.

Diesel power is in the the Ministry of industry and information technology, the Ministry of Finance and the state ministries and commissions under the strong support, China Shipbuilding Industry Corporation integrated seven one one, Shaanxi diesel engine heavy industry limited liability company, Chongqing Red River Machinery Limited company and other units of high quality resources, according to the modern enterprise model of the formation of professional marine diesel engine project company, owned domestic marine diesel engine with high quality R & D and manufacturing resources, is responsible for the independent brand of medium-speed diesel engine research and development, brand planning and promotion, supply chain construction and after sale service.In diesel power in 2008 officially launched the first domestic with independent intellectual property rights of the 6CS21 / 32 marine medium speed diesel engine development project, identified the series and type spectrum, the first product of the core technical index, main structure features, main parts supply and R & D cooperation mode, and officially named the series of products" CS". After 3 years of hard work, finally finished product R & D, design, manufacture, test, by the China Classification Society certificate.6CS21 / 32 medium speed diesel engine cylinder bore stroke of 210mm, 320mm, 1320kW output power, speed is 900 ~ 1000, can be used as a large ship, offshore ship, inland river ship, ship, ro-ro ship propulsion and offshore, ocean-going vessels, offshore platform generator prime mover. The product has remarkable technical superiority and the characteristic, technical indicators advanced, full load has excellent economic performance, fuel consumption rate is better than that of the current international advanced products; meet the harsh international environmental protection regulations. Emission can meet the International Maritime Organization IMOTierII emission requirements, and lower than the limit value of more than 15%, at the same time to meet with the next phase of the IMOTierIII in accordance with the requirements of potential. In the design in accordance with domestic materials and manufacturing technology level, the first machine component homebred change rate more than 60%, number of postnatal localization rate can reach more than 90%.The independent brand of medium speed marine diesel engine development is successful, be helpful for our country diesel product upgrading, promoting China's diesel engine technology level.

MAN company is the world's most professional diesel engine manufacturing company, the single largest capacity can reach 15000KW. Ocean shipping is the main power supplier. China 's large diesel power plant also rely on the MAN companies, such as Guangdong Huizhou Dongjiang plant ( 100000 KW ). Foshan Power Plant ( 80000 KW ) are provided for MAN units. At present, the world's first diesel engine was kept in National Museum exhibition in germany.Diesel generator is a small power generation equipment, means the diesel fuel, to diesel engine prime mover driven generator to power machinery. The whole unit is generally composed of diesel, generator, a control box, a fuel tank, starting and control storage battery, protection device, emergency cabinet and other components. Integral can be fixed on the foundation, positioning, can also be installed in the trailer, for mobile use. Diesel generator is a continuous operation of power generation equipment, if the continuous operation of more than 12h, the output power will be lower than the rated power of about 90%. Although the diesel generator power is low, but because of its small size, flexible, lightweight, supporting complete, convenient operation and maintenance, and is widely used in mining, railway, field construction sites, road traffic safeguard, and factory, enterprise, hospital departments, as a standby power supply or temporary power.