Bearing apparatus and pump

A bearing apparatus comprising:

• a bearing unit for receiving a load of a rotational shaft;
• a lubricating oil reservoir disposed below the bearing unit;
• and
• an oil disk fixed to the rotational shaft and rotatable together with the rotational shaft to scoop up lubricating oil stored in the lubricating oil reservoir;
• wherein the oil disk has a side surface facing the bearing unit, the side surface having a groove formed therein;
• an outer-circumferential-side end surface of the groove extends parallel to an axial direction of the rotational shaft;
• the outer-circumferential-side end surface constitutes a guide surface for changing a direction of movement of the lubricating oil in the groove from a radial direction of the oil disk to the axial direction of the rotational shaft;
• and
• the outer-circumferential-side end surface is connected to the side surface of the oil disk.

A bearing apparatus comprising:

• a bearing unit for receiving a load of a rotational shaft;
• a lubricating oil reservoir disposed below the bearing unit;
• and
• an oil disk fixed to the rotational shaft and rotatable together with the rotational shaft to scoop up lubricating oil stored in the lubricating oil reservoir;
• wherein the oil disk has a side surface facing the bearing unit, the side surface having a circumferential wall projecting toward the bearing unit and extending around the rotational shaft;
• an inner circumferential surface of the circumferential wall extends parallel to an axial direction of the rotational shaft;
• and
• the inner circumferential surface of the circumferential wall constitutes a guide surface for changing a direction of movement of the lubricating oil on the side surface of the oil disk from a radial direction of the oil disk to the axial direction of the rotational shaft.

A bearing apparatus comprising:

• a bearing unit for receiving a load of a rotational shaft;
• a lubricating oil reservoir disposed below the bearing unit;
• and
• an oil disk fixed to the rotational shaft and rotatable together with the rotational shaft to scoop up lubricating oil stored in the lubricating oil reservoir;
• wherein the oil disk has a first side surface facing the bearing unit, a second side surface located opposite to the first side surface, and a plurality of through-holes extending from the first side surface to the second side surface;
• the through-holes have outer-circumferential-side surfaces extending parallel to an axial direction of the rotational shaft;
• and
• the outer-circumferential-side surfaces of the through-holes are connected to the first side surface and the second side surface of the oil disk.

A pump comprising:

• a rotational shaft;
• an impeller fixed to the rotational shaft;
• and
• a bearing apparatus according to claim 1, for rotatably supporting the rotational shaft.