US 9,810,259 B2
Thrust bearing
Akihisa Furuno, Tokyo (JP)
Assigned to IHI CORPORATION, Tokyo (JP)
Filed by IHI Corporation, Tokyo (JP)
Filed on Apr. 14, 2015, as Appl. No. 14/686,108.
Application 14/686,108 is a continuation of application No. PCT/JP2013/078070, filed on Oct. 16, 2013.
Claims priority of application No. 2012-228892 (JP), filed on Oct. 16, 2012.
Prior Publication US 2015/0219147 A1, Aug. 6, 2015
Int. Cl. F16C 17/04 (2006.01)
CPC F16C 17/042 (2013.01) [F16C 17/047 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A thrust bearing disposed so as to face a thrust collar provided on a rotary shaft, the thrust bearing comprising:
a top foil disposed so as to face the thrust collar;
a back foil disposed so as to face a surface of the top foil opposite to another surface of the top foil facing the thrust collar, and supporting the top foil; and
an annular plate-shaped base plate disposed on a side of the back foil opposite to the top foil, and supporting the back foil,
wherein the back foil is formed of back foil pieces arranged in a circumferential direction of the base plate,
the top foil is formed of top foil pieces disposed on the back foil pieces,
the base plate includes support areas which support the back foil pieces and which are arranged in the circumferential direction,
at least one of the support areas includes an inclined surface defined by a first boundary line and by a second boundary line disposed on a trailing side of the first boundary line in a rotational direction of the thrust collar,
the inclined surface has a height which gradually increases from the first boundary line to the second boundary line, and is formed continuously from the first boundary line to the second boundary line, and
at least one of the back foil pieces is disposed within the inclined surface.