Analytical Research On Mechanical Properties Of Aerial Rolling Bearings

Rolling bearings are widely used in areoengine and aerial transmission device. High rotational speed of aerial bearing leads to high centrifugal effect, which change outer and inner contact angle between rollers and rings. The deformation and load distribution also change. To find the load distribution, the mechanical model of rolling bearing must be set up. In addition, the performance and properties of bearing, such as stiffness, deformation, load capacity, lubrication condition, friction, etc, are calculated on the basis of its load distribution. Therefore, the research of mechanical properties of bearing has significant value in aviation engineering areas.By qusi-dynamic method, the deformation and load distribution of rolling bearing under combined load are analyzed through the use of ring-controlled theory. The calculation programme is developed for the low speed and high speed models. And the influence of force and rotational speed to load distribution is studied. In aviation, some bearings have flexible rings, which change the load distribution. Finite element matheod can set up the mechanical model. By finite element matheod, a 2-D model of short cylindrical roller bearing is set up in ANSYS to analyze its load distribution under radial force. And the influence of radial force, rotational speed and friction on deformation is discussed. After calculating load distribution, the changing of contact angle, deformation, contact stiffness, oil film thickness and ratio of revolution and rolling is studied with different speeds, loads, materials and clearances.It is found that load distribution of rolling bearing based on ring-controlled theory is reliable. The result of finite element matheod is larger than result ofqusi-dynamic method. Both of them can solve the load distribution of bearings.