1. Air cooling
Air cooling adopts fan air supply method. Cold air is used to blow the ends of the generator set windings, the generator set stator and rotor. dissipate heat. Cold air absorbs heat. It turns into hot air after the first air fusion between stator and rotor, it is discharged through the iron core air duct and cooled by the cooler. The cooled air is then sent into the generator by the fan to circulate there to achieve the heat dissipation goal. Medium and small synchronous generators generally use air cooling. For reference only (Reply from Fujian Yanan Electric)
2. Hydrogen Cooling
Hydrogen cooling uses hydrogen as a cooling medium. The heat dissipation performance of hydrogen is betterthan those of the air. Most turbogenerators are cooled by hydrogen.
3. Water Cooling
Water cooling uses dual internal water cooling of the stator and rotor. The external cold water system of the stator water system flows through the water pipe to the water inlet ring installed on the stator base. It flows to each coil through the insulating pipe respectively. After absorbing the heat, it is collected through the insulated water. hose to the water outlet ring installed on the base of the machine. It then flows into a water system outside the generator for cooling. The rotor water system cooling first enters the water inlet bracket installed on the end of the side shaft of the exciter, and then flows into the center hole of the rotor shaft. rotor, then flows to the water collection tank along several holes meridional, then flows to each coil through the insulating tube. After the cold water absorbs heat, it flows into the water outlet tank through the insulating pipe, and then flows to the water outlet bracket through the drainage hole on the outer edge of the water outlet tank and is discharged through the main water outlet pipe. . Since the heat dissipation performance of water is much higher than that of air and hydrogen, newly built large-scale generator sets generally use water cooling. For reference only (reply from Fujian Yanan Electric)
The world's first water-cooled double internally cooled turbogenerator
The generator set is composed of a main engine (diesel engine, engine gasoline, steam engine turbine, etc.) and generator;
The so-called water-cooled unit refers to the use of water to recool the generator (there is no need to mention the main engine, it must be cooled with water);
The water-cooled unit has dual-water internal cooling and single-water internal cooling; that is, both the stator and the rotor are cooled by the water inside the wires, which is called internal dual water cooling only the stator. is cooled with water and the rotor is cooled with hydrogen, which is a single water internal cooling. (Large generators generally no longer use air cooling, but generally use hydrogen, because the mass of hydrogen is much smaller than that of air and its thermal conductivity is much better, which can greatly improve cooling efficiency; while water has large heat capacity and better cooling effect, but it is difficult to achieve.
What are the compounds.structural ants of a hydrogenerator?
On October 27, 1958, the world's first 12,000 kilowatt, 3,000 rpm water-cooled double internally cooled turbine generator was born at the Shanghai Electric Machinery Factory.
In December of the same year, the Soviet Union organized a large-scale conference on turbogenerator cooling at the Leningrad “electricity” plant. In addition to the participation of major automobile manufacturers and research units of the Soviet Union, this meeting also included Wu Tianlin, deputy chief engineer of the Harbin Automobile Plant in Poland, Hungary and China, and Wang Geng of the Shanghai automobile factory. According to the instructions of the leaders, Wu Tianlin announced at the conference that China had produced 12,000 kilowatts at 3,000 rpm/min. The news of double internal water-cooled turbogenerators shocked the delegates at the meeting. Alexeiev, meadowresident of the Soviet Society of Electrical Engineering and Academician of Soviet Scientific Communications, congratulated the Chinese representatives and told the meeting that China was the first to test produce a water-cooled twin-turbine generator 12,000 kW water at 3,000 rpm using a 6,000 rpm motor. Rotary shaft kW. In Conference Proceedings and Proceedings. This is the first foreign report on China's first trial production of a water-cooled dual turbine generator.
The hydraulic generator is composed of rotor, stator, frame, thrust bearing, guide bearing, cooler, a brake and other main components. The stator is mainly composed of frame, iron core, winding and other components. The stator core is made of cold-rolled silicon steel sheets and can be made into integral or divided structures.depending on manufacturing and transport conditions. The cooling method of hydraulic generator generally adopts closed circulation air cooling. Very large capacity units tend to use water as the coolant to directly cool the stator. If the stator and rotor are cooled at the same time, it will be a water turbine generator set with double internal water cooling.