Characteristics Analysis of Herringbone Grooved Radial Aerodynamic Lubrication Bearings
The mathematic model of herringbone grooved radial aerodynamic lubrication bearings was established,and the differential form of Reynolds equation of gas lubrication under oblique coordinate system was deduced by using finite differential method.The characteristics such as the film thickness,film pressure and load capacity inside the clearance of bearing were obtained using numerical integral method,and the effects of the bearing geometrical structural parameters of the bearing radial clearance,spiral angle,groove depth,groove width rate and number of groove,and rotate speed of vari-ous working conditions on bearing capacity were analyzed.The results show that the pressure of herringbone grooved bear-ing is distributed in hackle in circumference direction,and the herringbone pressure band is encircled on the neck of shaft,which makes the bearing to achieve bearing load in all directions,thereby improves its stableness and anti-vibra-tion.The load capacity of bearing can be improved all by increasing the eccentricity,reducing average clearance of gas film,increasing spiral angle,decreasing groove depth,increasing groove width rate and suitably increasing number of groove.The herringbone grooved structure can better achieve the dynamic effect of aerodynamic lubrication bearings,and improve stability and load capacity of the bearings.
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万方数据
维普
