During the operation of steam turbine, the heat that lubricating oil needs to take away mainly comes from the heat generated by the sliding friction between the rotor journal and the bearing. The heat of high-temperature steam is transmitted to the journal through the moving blades and other parts on the turbine rotor, and the heat generated by the excessive rotor current of the engine and the magnet heat are transmitted to the journal through the generator rotor. If the turbine oil is emulsified, the temperature of emulsified deposits and journal can not be controlled within the specified value, which is easy to cause tile burning accident.
Gas turbine is a kind of internal combustion engine which uses continuously flowing gas as working medium, drives the impeller to rotate at high speed, and converts the energy of fuel into useful work. This is a rotary impeller heat engine.
Gas turbine is an advanced and complex complete set of power machinery and equipment, and it is a typical high-tech intensive product. As a carrier of high technology, gas turbine represents the comprehensive level of multi-theoretical disciplines and multi-engineering fields, and is the dominant technology in 2 1 century. The development of gas turbine industry, which integrates new technologies, new materials and new processes, is one of the important symbols of the country's high-tech level and scientific and technological strength, and has a very prominent strategic position.
Due to various reasons, there is still a big gap between China's gas turbines and the international advanced level, and a real industry has not yet formed. The backwardness in many fields has become a "bottleneck" that restricts the development of the national economy. Its technology is only controlled by a few developed countries in the world, and the export of advanced gas turbines from western countries to China is still restricted.
Gas turbine is the main core equipment. If we rely on imports for a long time, it will be subject to people in key technologies, which is not conducive to the healthy and rapid development of China's gas turbine power industry and related industries. In terms of market capacity, three of the four major projects in China in the new century, such as "West-to-East Gas Transmission", "West-to-East Power Transmission" and "South-to-North Water Transfer", all need a large number of 30 MW industrial gas turbines, and the healthy and rapid development of China's shipbuilding industry needs a large number of 30 MW marine gas turbines. China has become the largest potential market for gas turbines in the world.