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August 5, 2020
Turbine is a kind of water can be converted into mechanical work fluid machinery, in accordance with the principle can be divided into the counter type turbine with impact of water turbine. At the same time using flow kinetic energy and potential energy to convert the energy of the turbine is called back water turbine, and only use flow kinetic energy of the turbine is pelton turbine.
Francis turbine is most widely applied in our country, stand-alone capacity is the highest. Our country is developing 800 MW, 1000 MW turbine. Our country is now independent of the kaplan turbine, wheel diameter 10.4 m, single output up to 150 MW, the highest efficiency more than 93%. Tubular turbine manufacturing technology in recent years has been the leap-forward development of Brazil in 2009 with the development of the turbine generator output can reach 75 MW, the diameter is 7.9 m. The highest efficiency of tubular turbine is more than 93%. In China the biggest pelton of up to 160 MW turbine power, has 21 basin. The highest efficiency of impulse turbine is now more than 91.5%.
Francis turbine development at a high efficiency, large capacity goal at the same time, the security, stability and reliability of the whole machine, etc. Put forward higher request, therefore should study the optimization of the whole machine, using the CFD technology in the application of water turbine hydraulic design, and combining with the experience model, analyzing the flow state and flow within the components, to optimize the geometric lines, improve its performance.
Kaplan turbine current development goal is to high water head, large capacity and direction of environmental protection, to improve efficiency and flow capacity at the same time, needs to focus on solving the problem of strength and cavitation problem at the same time. Of the kaplan turbine blade oil is an important environmental indicators, the reliable sealing measures or drive scheme, used to prevent blade leakage.
Tubular turbine under the 20 m is widely used in low head hydro power station, as well as Marine tidal power station's first choice. Tubular turbine is the key to develop in the direction of large capacity, and gradually achieve the standardization, and reduce the cost, to realize batch production. With tubular turbine for tidal power station should focus on research to the environment under the conditions of use, such as anti-corrosion materials, salt, Marine biology, etc.
Pelton turbine is the development direction of high head, nozzle, giant. At the same time pay attention to efficiency, improve the hydraulic performance, improve the specific speed, enhance durability, at the same time prevent jet interference is the important research field. At the same time pay attention to efficiency, improve the hydraulic performance, improve the specific speed, enhance durability, at the same time prevent jet interference is the important research field.
Turbine of large scale, specialization, modernization and overall development goal is to simplify, on the basis of the need to guarantee the reliable products, ensure the product performance, and focused on the properties and applications of all kinds of water turbine condition difference, to classify, "suit the remedy to the case" for the future development goals and specific measures.