Influence of Centrifugal Forces on Oil Flow in Journal Bearing of Planetary Gear

Mikhail Temis (1, 2) , Alexander Lazarev (1, 2)

1 CIAM - Central Institute of Aviation Motors [Moscou]
2 Bauman Moscow State Technical University

Mathematical model of oil flow in fluid film bearing in field of centrifugal forces is developed. Centrifugal forces for planet wheel bearing sliding surfaces and oil gap are formulated. This model is based on modification of two-dimensional Reynolds equation taking into account inertia centrifugal forces for oil film. Required modification of Reynolds equation is received from Navier-Stokes and continuity equations taking into account centrifugal forces acting on planet wheel bearing. Modified 2D Reynolds equation is solved numerically using finite-element discretization. Developed mathematical model is verified at comparison with solution of full Navier-Stokes equations system obtained in commercial software package. Results for pressure distribution for bearing with fixed axis and for planet wheel bearing are received and compared. The sufficient influence of centrifugal inertia forces in oil layer of planet wheel bearing on pressure distribution, bearing carrying force and attitude angle is shown for specific shaft journal eccentricity ratio, eccentricity direction and rotation velocity.

Mots clés: fluid film bearing; centrifugal inertia forces; Reynolds equation

Domaines: Mécanique [physics]

Mikhail Temis, Alexander Lazarev. Influence of Centrifugal Forces on Oil Flow in Journal Bearing of Planetary Gear. 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Apr 2016, Honolulu, United States. ⟨hal-01894395⟩