Precision bearing improve speed, can be used in aviation technology

As we all know, the bearing has a very wide range of USES, big to heavy machinery, toys, small to have played a vital role, the speed of the bearing, straight is bearing developers headaches, the higher the precision bearing rotating speed, the less the friction force, used for engine and other accessories, power will be more strong. Aviation technology to greater demands of the precision bearing, for aviation instrument must power is very strong, can toward the sky. Today, under the bearing belt you know precision bearing improve speed, can be used in aviation technology. Air bearing is the key component of aircraft engine, with a high temperature, high speed, large load, complex stress state, the harsh environment, etc. In theory, the direct way to improve aviation engine thrust and fuel rate still is to improve the turbine inlet temperature and rotor speed, and improve the speed of air bearing limit speed performance, heat resistance ability, lubricating performance and carrying capacity are more severe requirements are put forward. I though bearing industry after years of rapid development, now has become a bearing production and sales amount of the world's three bearing is big, but the key technology domain remains to be strengthened, especially in air bearing technology compared with the world top bearing gap is obvious, can't meet my aviation equipment rapid development model and the improved performance of the requirements. According to public information disclosure, and the advanced air bearing products for the design life of the life of a more than 8 times ( Up to 30 times above) , reliability is more than 98%, and I like the life of the air bearing design life of three to five times, reliability is approximately 96%. For example I like turbine engine spindle bearing life for 500 to 1500 hours, large altitude does not exceed 200 ℃ of heat-resistant, gear oil cut-off emergency dry running ability is less than half an hour, and can be done in western developed home bearing life of 3000 to 6000 hours, heat resistance value is 350 ℃, dry running ability more than an hour and a half, and the actual performance than the index. It is because of my high bearing technology is insufficient, causes the air bearing, high-speed bearing, bearing high bearing domain robot basically is give priority to in order to import bearings, it urgently needs to improve in these key domain. So at home plan, 973 plan, 863 science and technology research plan, the home such as natural science fund projects under the joint support, I Harbin industrial university, Harbin bearing manufacturing co. , LTD. Jointly conducted Si3N4 hybrid silicon nitride ceramic bearings and industrial application. Hybrid ceramic bearing by inner and outer ring of bearing steel, silicon nitride ceramic balls and stainless steel holder and so on, it combines the advantages of both the metal and ceramic performance. According to public information, the requirement of high performance bearing application domain, the silicon nitride ceramic balls is thought to have a better comprehensive mechanical and physical performance. Under the environment of high temperature bearing steel ball is very easy to lose its hardness and strength, and silicon nitride ceramic ball at 400 ℃ can keep its original hardness, only in reaches 800 ℃, its hardness and strength began to fell sharply. And even bearing failure occurs, so also in ways similar to the bearing steel ball lost the local peeling method, while the other types of ceramic material damage in catastrophic rupture way, this kind of situation in air bearing domain is not allowed. And the ceramic ball bearing is oilless self-lubrication properties, friction coefficient is small, can achieve very high speed, is a metal bearing speed 1. More than 5 times, can meet the requirements of engine thrust and increase the combustion rate increase. Kill, due to the ceramic ball can be done even if the lubricating grease bearing can run normally, thus avoiding the ordinary because the grease in the bearing metal kill lead to premature bearing damage phenomenon, its suitable for aeroengine runtime. According to public information disclosure, presumably, hybrid ceramic bearing or already in my new 15 aircraft turbofan engine and transmission domain obtained the preliminary application. In order to improve my navy ships ranged combat ability, certain submarine-launched/ship to shoot the anti-ship missile proposed increase the range and speed of the design requirements, the play with the turbine rotor must reach the rated speed above 120000 RPM. At the beginning of the test project, using a metal air bearing production during engine operation test, when test speed of 40000 r/min, bearing quickly fever and cause the emitted smoke. Continue to work for a few minutes later, bearing a strong noise, then stop holding shaft, seriously affected the missile development progress, have to through different channels to purchase high speed aviation bearings to meet the demand of missile engine turbine rotor. In the later after using developed by Harbin institute of hybrid ceramic bearing, bearing time by 5 hours continuous running life assessment, in the process of test, the bearing except for a slight smoke produced, are no exception. After test the bearing rotating flexible, without exception. As my helicopter engine development of transmission technology, ceramic roller bearings with its superior performance has been applied to the transmission system of high-speed input, clutch, transmission shaft and tail reducer pitch lever and planetary gear train, in areas such as the main reducer of dry running time from half an hour to an hour, to meet the operating requirements of installed. The above is to tell you about precision bearing to improve the speed, can be used in the department of aviation technology content. As my bearing technology is more and more advanced, we can develop a more advanced aviation equipment, production of precision bearing products are of good quality and reasonable price, welcome you to visit our factory! Tags: precision bearing to improve speed