Comparative Study on the Effect of Recesses on Conical Hybrid Journal Bearing Compensated with CFV under Micropolar Fluid Lubrication

Abstract

This paper theoretically presents the comparative performances of conical hybrid journal bearing with 4-pockets and 6-pockets compensated with constant flow valve (CFV) under micropolar fluid lubrication for various semi-cone angles. The numerical solution of the modified Reynolds equation for micropolar fluid flow on the conical surface has been done by using finite element method using Galerkin’s technique along with the necessary boundary conditions and iterative scheme. The bearing performances have been presented for two different semi-cone angles, radial load and the restrictor design parameter. It is observed that bearing performances improve for 6-pockets CFV than 4-pockets. The bearing performances also increase with increase in semi-cone angle, constant flow valve restrictor and micropolar parameters significantly. With increase in semi-cone angle of bearing the direct stiffness, damping coefficients and the stability have been observed to increase under micropolar lubrication for 6-pockets CFV restrictors.

Keywords

• constant flow valve restrictor
• conical bearing
• micropolar lubrication
• finite element method