Hydrodynamic bearing intended to support a cylinder driven in rotation about its axis

摘要

A hydrodynamic bearing for supporting a hollow cylinder that may be deformable in the radial direction, driven in a rotational movement about its axis, the diameter being greater than or equal to one meter, the bearing essentially consisting of a bushing and a bushing support, and in which the bushing, notably of constant thickness, extends over a portion of cylinder of axis δ, having a guide surface, intended to follow the exterior surface of the cylinder via a film of lubricant, and a surface secured to the bushing support. The bushing support has, if appropriate locally, at least in the region of an intermediate zone of the bearing, cross-section-reducing elements allowing elastic deformation of the bearing so as to limit the maximum value of the guide forces over the bushing. The bearing is useful in supporting and guiding a rotating hollow grinder subjected to unevenly distributed forces during rotation.

主权项

1. A hydrodynamic bearing (1) for supporting a hollow cylinder (2) which is to be driven in a rotation movement about an axis of rotation, said bearing (1) consisting essentially of a shell (3) and a shell support (4),
wherein said shell (3) extends in a portion of a cylinder of axis δ, having a guide surface (31), with a radius of curvature intended to correspond to the radius of curvature of said cylinder (2), intended to match the external surface of said cylinder (2) through a film of lubricant, and a surface (32) secured to said shell support (4), opposite to said guide surface (31), said shell (3) and said shell support (4) intended to support a cylinder having a diameter greater than or equal to one meter, and wherein the shell (3) is made from a soft metal, said shell support (4) being made from a metal with a hardness greater than the metal of said shell (3), said shell support (4) absorbing the forces over the entire surface (32) of said shell (3) opposite to the guide surface (31), without any discontinuity of contact in order to control the deformation of said shell (3), the shell support (4) having, at least at an intermediate area of said bearing (1), means (5; 6; 7; 8) of weakening the cross section conferring on said shell support (4) an elasticity, allowing an elastic deformation of said bearing (1) so as to limit the maximum value of the guide forces on said shell (3).