Aircraft launch machine with what kind of bearing, how to achieve high temperature resistance and smooth?

Data and smooth oil are the key. First said the there is major airlines launched machine - — Is the turbine machine, in room temperature can reach 1500 degrees above, usually the speed of the turbine blade is close to a round of the highest reached more than 30000, 20000. For mechanical parts in the air launch machine working environment is a very harsh environment. But be careful, this kind of the high temperature of 1500 degrees is actually attack in quench chamber and the nozzle. Not in the position of the bearing. First take a look at a typical jet launched machine structure, here we can see the whole launch machine temperature the highest local is red, the real under red local participation in action as long as a set of gas turbine. That is to say as long as the circle on the drawing of the turbine will be on the edge of the circular quench chamber of export locally by the effect of high temperature gas. This can cause bearing has a great deal of 'living space'. Continue to synthesis this shaft, we can find the location of the bearing interval turbine has a long interval. Of course this is a match simple turbojet launched machine, but more complex turbojet launch machine is far away from the turbine bearings. This has led the real to the bearing temperature is not high, only 300 degrees. If not higher than many people think? Therefore, a wide range of use on the local bearing of high hardness, high temperature resistant M50Nil as the main materials of bearing steel. At the same time a lot of people say air bearing are made from nitriding technology progress of hardness, actually not complete - — That is more than 20 years ago, in person in China is now the use of titanium nitride coating. This is a kind of artificial ceramic materials. Hardness is close to the diamond melting temperature reached 2930 degrees. This data is currently the best launch machine bearing ( No one) 。 So in the picture above these gold bearing parts after the root of the hair is also a kind of air stability observation elements. The second is smooth. In airlines launched machine oil circuit design, smooth, smooth oil on bearing has more than one and 'water', use a lot of smooth oil washed away the bearing heat. We see the airlines launched machine smooth oil spread mainly in the above three bearing, the smooth of the three bearing oil was heated, would be the smooth oil cooler ( Lubricating oil cooler) Stop the cooling, such, role in launch machine bearing large local heat will by smooth oil and distribute to carry out.