Lubrication system for rolling bearing

A lubrication system for a rolling bearing to supply lubrication oil to a rolling bearing for rotatably supporting a shaft rotating at a high speed within a housing, the system comprised of;

• an inner ring fitted around and supported by the shaft within the housing and having an outer peripheral surface on which an inner ring raceway is formed;
• an outer ring fitted into and supported by the housing and having an end surface and an inner peripheral surface on which an outer ring raceway is formcd;
• a plurality of rolling elements provided between the inner ring raceway and the outer ring raceway;
• outer ring spacer provided adjacent to the outer ring, fitted into and supported by the housing, having an inner peripheral surface and an end, and formed with a lubrication oil path,
• an inner ring spacer provided adjacent to the inner ring, fitted around and supported by the shaft, and having an outer peripheral surface formed with a guide slope surface,
• the guide slope surface having a smaller diameter end and larger diameter end,
• an oil supplying gap provided between the inner peripheral surface of the end of the outer ring spacer and the guide slope surface of the inner ring spacer,
• wherein the guide slope surface is tilted in a direction such that the diameter thereof is decreased as it is separated from the inner ring raceway,
• wherein the guide slope surface has a smaller diameter end projected in the axially outer direction than the end surface of the outer ring to enter into the radially inner side of the outer ring spacer, and
• a nozzle hole provided to open in the inner peripheral surface of the outer ring spacer to spout the lubrication oil, supplied through the lubrication oil path, into the guide slope surface, and
• wherein any portion where the sloping direction and/or sloping angle suddenly changes is excluded from the guide slope surface from the smaller diameter end to the larger diameter end.

A lubrication system for a rolling bearing to supply lubrication oil to a rolling bearing for rotatably supporting a shaft rotating at a high speed within a housing, th lubrication system comprised of;

• all inner ring fitted around and supported by the shaft within the housing and having an outer peripheral surface on which an inner ring raceway is formed;
• an outer ring fitted into and supported by the housing and having an end surface and an inner peripheral surface on which an outer ring raceway is formed;
• a plurality of rolling elements provided between the inner ring raceway and the outer ring raceway;
• an outer ring spacer provided adjacent to the outer ring, fitted into and supported by the housing, having an inner peripheral surface and an end, and formed with a lubrication oil path,
• a guide slope surface provided on thc outer peripheral surface of the inner ring, and having a smaller diameter end and a larger diameter end, oil supplying gap provided between the inner peripheral surface of the end of the outer ring spacer and the guide slope surface,
• wherein the guide slope surface is tilted in a direction such that the diameter thereof is decreased as it is separated from the inner ring raceway,
• wherein the guide slope surface has a smaller diameter end projected in the axially outer direction than the end surface of the outer ring to enter into the radially inner side of the outer ring spacer,
• a nozzle hole provided to open in the inner peripheral surface of the outer ring spacer to spout the lubrication oil, supplied through the lubrication oil path, into the guide slope surface, and
• wherein any portion where the sloping direction and/or sloping angle suddenly changes is excluded from the guide slope surface from the smaller diameter end to the larger diameter end.