TURBOMACHINE
2 Assignments
0 Petitions
Accused Products
Abstract
A turbomachine includes: a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an oil-drain channel disposed around the rotational shaft, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars. The oil-drain channel includes: an oil-drain port portion for discharging the lubricant oil inside the oil-drain channel downward; and an oil-guide channel portion disposed above the oil-drain port portion and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion. The oil-guide channel portion has an asymmetric shape with respect to a rotational direction of the rotational shaft, the oil-guide channel portion having a minimum flow-path cross sectional area at a first position on an upstream side in the rotational direction, and a maximum flow-path cross sectional area at a second position on a downstream side of the first position.
-
Citations
29 Claims
-
1-15. -15. (canceled)
-
16. A turbomachine, comprising:
-
a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an annular channel disposed around the rotational shaft in an annular shape, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars, wherein the annular channel includes; an oil-drain port portion forming a lower region of the annular channel, for discharging the lubricant oil inside the annular channel downward; and an oil-guide channel portion disposed above the oil-drain port portion so as to form an upper region of the annular channel and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion, and wherein the oil-guide channel portion forming the upper region of the annular channel has an asymmetric shape with respect to a rotational direction of the rotational shaft, the oil-guide channel portion having a minimum flow-path cross sectional area at a first position on an upstream side in the rotational direction, and a maximum flow-path cross sectional area at a second position on a downstream side of the first position. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28)
-
-
27. A turbomachine, comprising:
-
a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an oil-drain channel disposed around the rotational shaft, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars, wherein the oil-drain channel includes; an oil-drain port portion for discharging the lubricant oil inside the oil-drain channel downward; and an oil-guide channel portion disposed above the oil-drain port portion and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion, and wherein a relational expression V×
S>
Q is satisfied, where V is a flow rate of the lubricant oil at each position in the oil-guide channel portion, S is a flow-path cross sectional area S at each position in the oil-guide channel portion, and Q is a supply amount of the lubricant oil to the thrust bearing. - View Dependent Claims (29)
-
Specification