Displacement type fluid machine

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:

• lubricating fluid pumps provided at respective sliding portions of said rotating shaft, for feeding lubricating fluid to said respective corresponding sliding portions;
• wherein a first one of said lubricating fluid pumps, which is immersed in said lubricating fluid stored in said lubricating fluid-storing chamber, generates pressure P=(1.0 to 1.5) Lρg sufficient to assure a pump head to a next lubricating fluid pump, where L:
• the height to the next lubricating fluid, ρ:
• the density of said lubricating fluid, and g:
• gravity;
• 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.

A displacement fluid machine including a mechanism for compressing or transferring operating 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 three 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 fluid 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;
• 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 the two sliding portions;
• and
• a third lubricating fluid pump, which is provided at or near 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 third 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.

A displacement fluid machine including a mechanism for compressing working fluid, a rotating shaft for driving 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.

A displacement fluid machine including a mechanism for compressing working fluid, a rotating shaft for driving 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;

• 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.
• lubricating fluid pumps provided at respective sliding portions of said rotating shaft, for feeding lubricating fluid to said respective corresponding sliding portions;
• wherein a first one of said lubricating fluid pumps, which is immersed in said lubricating fluid stored in said lubricating fluid-storing chamber, generates pressure P=(1.0 to 1.5) Lρg sufficient to assure a pump head to a next lubricating fluid pump, where L:
• the height to the next lubricating fluid, ρ:
• the density of said lubricating fluid, and g:
• gravity;

A displacement fluid machine including a mechanism for compressing a working fluid, a rotating shaft for driving said mechanism, at least three 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 fluid 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;
• 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 the two sliding portions;
• and
• a third lubricating fluid pump, which is provided at or near 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 third 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.