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公开(公告)号：US20170159702A1
公开(公告)日：2017-06-08
申请号：US15325363
申请日：2014-10-21
CPC分类号： F16C17/04 , F01D25/168 , F05D2220/40 , F16C17/047 , F16C33/02 , F16C33/1075 , F16C2360/24 , H02K5/167
摘要： To reduce bearing loss due to an oil-shortage region on a pad facing a thrust collar, a thrust bearing according to at least one embodiment of the present invention includes a thrust collar, and at least one bearing pad disposed along a circumferential direction on a bearing surface, the at least one bearing pad having a tapered portion and a land portion. Each of the at least one bearing pad is formed so that a periphery portion on an outer side with respect to a radial direction gets closer to an inner side with respect to the radial direction toward an upstream side with respect to the rotational direction.
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公开(公告)号：US20170276233A1
公开(公告)日：2017-09-28
申请号：US15515332
申请日：2014-12-18
发明人： Tadasuke NISHIOKA , Yosuke DANMOTO , Isao TOMITA , Takashi NAMBU , Yoji AKIYAMA , Yuya KOJIMA , Tatsuya ISHIZAKI , Seigi YANO , Takaya FUTAE , Motoki EBISU
IPC分类号： F16H57/04
CPC分类号： F16H57/0409 , F01D25/18 , F02B39/14 , F04D29/056 , F05D2220/40 , F16C17/04 , F16C33/1025 , F16C2360/24 , F16H57/042
摘要： An oil-drain device for a thrust bearing includes: a rotor shaft; a collar member mounted to an outer periphery of the rotor shaft; a thrust bearing supporting the rotor shaft in an axial direction; and an oil-drain space forming member defining an oil-drain space through which lubricant oil leaking from a sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member. The oil-drain space includes: an oil-drain channel defined between a first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, surrounding the flange portion of the collar member; and an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space. The oil-drain space is configured to guide the lubricant oil flowing through the oil-drain channel to outside the oil-drain space via the oil-drain port, along a flow direction of the lubricant oil flowing through the oil-drain channel from an upstream side toward a downstream side in a rotational direction of the rotor shaft.
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公开(公告)号：US20170234213A1
公开(公告)日：2017-08-17
申请号：US15518508
申请日：2014-11-17
发明人： Takaya FUTAE , Yosuke DANMOTO , Tadasuke NISHIOKA , Yoji AKIYAMA
IPC分类号： F02B39/14 , F01D25/18 , F04D29/063 , F01D25/16 , F04D29/051
CPC分类号： F02B39/14 , F01D25/166 , F01D25/18 , F02C6/12 , F04D29/051 , F04D29/063 , F05D2220/40 , F05D2250/312 , F16C17/04 , F16C33/1025 , F16C33/106 , F16C2360/24
摘要： 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.
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