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Basic Classification of the Gas-lubricated Bearings

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Air bearings with forced supply of the working fluid in the gap between the surfaces of the stator and the rotor (gas-static) are designed for advanced oil-free transmissions of gas-turbine plants.

Air bearings with forced supply of the working fluid in the gap between the surfaces of the stator and the rotor (gas-static) are designed for advanced oil-free transmissions of gas-turbine plants. Increasing the pressure at which the working fluid is supplied leads to the gap increases the load capacity and stiffness of the compressed layer, suppresses vibration. But the consumption of the working fluid increases as well and the efficiency of the construction lowers. The task of the design is to achieve a minimum working body consumption for the given load capacity. The comparison of the gas-static and gas-dynamic bearings is given. It is shown that the drawback of the first type is high air consumption that decreases the engine’s efficiency and of the second type – the fire risk and low resource. To overcome this contradiction, the turning segments are used. Such bearings are called hybrid, with self-adjusting inserts. They combine the best qualities of gas-dynamic and gas-static bearings. A classification of air bearings by several criteria is given.

 

Bulat M.P., Bulat P. V., 2013. Basic classification of the gas-lubricated bearing. World Applied Sciences Journal, 28(10): 1444–48. http://www.idosi.org/wasj/wasj28(10)13/17.pdf. DOI: 10.5829/idosi.wasj.2013.28.10.13924

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