US 11,655,851 B2
Bearing device and rotating device
Naoyuki Nagai, Tokyo (JP); Takuya Arakawa, Tokyo (JP); Takaya Futae, Tokyo (JP); Shuichi Miura, Tokyo (JP); Yosuke Dammoto, Sagamihara (JP); and Akihiro Sugiyama, Sagamihara (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 17/437,672
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Mar. 22, 2019, PCT No. PCT/JP2019/012114
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2020/194381, PCT Pub. Date Oct. 1, 2020.
Prior Publication US 2022/0163064 A1, May 26, 2022
Int. Cl. F16C 27/04 (2006.01); F16C 19/06 (2006.01); F16C 33/58 (2006.01); F16C 33/66 (2006.01); F16C 35/077 (2006.01)
CPC F16C 27/045 (2013.01) [F16C 19/06 (2013.01); F16C 33/586 (2013.01); F16C 33/6666 (2013.01); F16C 33/6681 (2013.01); F16C 35/077 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A bearing device for rotatably supporting a rotational shaft, the device comprising:
at least one rolling bearing which includes an inner race fixed to the rotational shaft, a rolling element, and an outer race for rotatably holding the rolling element with the inner race; and
a casing for housing the rolling bearing, the casing including a plurality of first oil supply holes formed at intervals in a circumferential direction for supplying lubricant oil to a first gap between the rolling bearing and an inner circumferential surface of the casing,
wherein each of the plurality of first oil supply holes satisfies:
π·d1·δ1<π·d12/4,  (a)
where d1 is a diameter of an outlet opening of the first oil supply hole, and δ is a space of the first gap.