Patent ID: 7604411
Filing Date: 2009-10-20
Classification: F16C,G11B

Abstract:
1. A fluid lubricated bearing device comprising: a housing with an opening portion provided on one end and a bottom portion provided on the other end; an axial member and a bearing member accommodated in the housing; a radial bearing portion, provided between an inner peripheral surface of the bearing member and an outer peripheral surface of the axial member, for allowing an oil film of a lubricating oil produced in a radial bearing gap to provide radial non-contact support to the axial member; a thrust bearing portion for supporting an axial end portion of the axial member in a direction of thrust; and a seal member, provided in an opening of the housing, for forming a seal space between an outer periphery of the axial member and the seal member, wherein an end face of the seal member is in contact with one end face of the bearing member, and wherein circulation grooves are provided to communicate a space around an axial end portion of the axial member in the thrust bearing portion with the seal space, and the lubricating oil flows along the circulation grooves between the seal space and the space around the axial end portion, and wherein the circulation grooves comprise a radial groove configured on the end face of the seal member; and an inner space of the housing that is sealed with the seal member, together with the circulation grooves, is filled with the lubricating oil such that an oil surface of the lubricating oil is located in the seal space.