Bearing device, rotating machine, and nozzle

A nozzle comprising:

• a nozzle main body that has
• a facing surface which faces an outer peripheral surface of a rotary shaft rotating around an axis, and in which a supply hole is formed through which a lubricant is discharged, and
• a guide surface which is connected to an upstream side of the facing surface relative to a rotation direction of the rotary shaft and extends toward a radial outer side while facing upstream relative to the rotation direction;
• and
• a block body that has a block surface, which is connected to a radial outer side of the guide surface and extends upstream relative to the rotation direction while facing a radially inward direction,
• wherein a supply hole group is formed by arranging a plurality of the supply holes in an axial direction of the rotary shaft, and
• a plurality of the supply hole groups are provided at an interval in a circumferential direction.

A nozzle comprising:

• a nozzle main body that has
• a facing surface which faces an outer peripheral surface of a rotary shaft rotating around an axis, and in which a supply hole is formed through which a lubricant is discharged, and
• a guide surface which is connected to an upstream side of the facing surface relative to a rotation direction of the rotary shaft and extends toward a radial outer side while facing upstream relative to the rotation direction;
• and
• a block body that has a block surface, which is connected to a radial outer side of the guide surface and extends upstream relative to the rotation direction while facing a radially inward direction,
• wherein a plurality of the supply holes are disposed to be positioned alternately in a circumferential direction from one side toward the other side in an axial direction of the rotary shaft.

A bearing device comprising:

• a rotary shaft having an axis extending in an axial direction and the rotary shaft being rotatable around the axis;
• a bearing pad that supports an outer peripheral surface of the rotary shaft;
• a nozzle that is disposed upstream of the bearing pad relative to a rotation direction of the rotary shaft and has a supply hole through which a lubricant is supplied to the outer peripheral surface of the rotary shaft;
• a pair of side plates that face the outer peripheral surface of the rotary shaft, the pair of side plates being disposed upstream of the nozzle relative to the rotation direction and being disposed on both sides of the nozzle in the axial direction, at least one side plate of the pair of side plates having a discharging hole penetrating the at least one side plate in the axis direction;
• and
• a guide surface that faces upstream relative to the rotation direction and extends in the axial direction over an entire length of the bearing pad in the axial direction, wherein
• the guide surface is circumferentially positioned between the supply hole and the discharging hole,
• the nozzle extends in the axial direction over the pair of side plates,
• the guide surface is a surface of the nozzle, which faces upstream relative to the rotation direction,
• the nozzle has a block surface, which is connected to a radial outer end of the guide surface with respect to the rotary shaft, and extends upstream relative to the rotation direction from the radial outer end of the guide surface and along a radial outer side of the discharging hole, and
• the discharging hole is located within a region surrounded by the guide surface, the block surface and an outer circumference of the rotary shaft, when viewed from the axial direction.