Patent ID: 6637550
Filing Date: 2003-10-28
Classification: F16N

Abstract:
A displacement fluid machine including a mechanism for compressing or transferring working fluid, or bringing out mechanical energy from working fluid, a rotating shaft for driving said mechanism or bringing out power from said mechanism, at least two sliding portions for smoothing relative motion between said mechanism and said rotating shaft, and a lubricating fluid-storing chamber for storing lubricating fluid used to lubricate said sliding portions, said displacement fluid machine comprising:a first lubricating fluid pump provided at said rotating shaft and immersed in said lubricating oil stored in said lubricating fluid-storing chamber, said first lubricating fluid pump feeding lubricating fluid to a first one of said two sliding portions and feeding lubricating fluid to a lubricating fluid-guiding path provided in said rotating shaft; and a second lubricating fluid pump which is provided at said rotating shaft, for raising the pressure of lubricating fluid which has been fed via said lubricating fluid-guiding path by a predetermined pump head, and feeding said lubricating fluid, which has been fed via said lubricating fluid-guiding path, to a second one of said two sliding portions; and wherein said first lubricating fluid pump includes a groove portion composed of a groove formed at the outside surface of said rotating shaft in the rotating direction of said rotating shaft, and the inside wall of a bearing of said rotating shaft.