US 11,920,630 B2
Self-lubricated sliding bearing
Christian Herbert Blome, Hamburg (DE); and Willem Potze, Geldrop (NL)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 17/276,228
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Sep. 10, 2019, PCT No. PCT/EP2019/074054
§ 371(c)(1), (2) Date Mar. 15, 2021,
PCT Pub. No. WO2020/058032, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 18195598 (EP), filed on Sep. 20, 2018.
Prior Publication US 2022/0049740 A1, Feb. 17, 2022
Int. Cl. F16C 17/02 (2006.01); F16C 33/10 (2006.01)
CPC F16C 17/026 (2013.01) [F16C 33/1065 (2013.01); F16C 33/107 (2013.01); F16C 2380/16 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A self-lubricated sliding bearing for a rotary X-ray tube, comprising:
a first bearing member;
a second bearing member configured to concentrically enclose a portion of the first bearing member; and
a lubricant comprised in a gap between cooperating surfaces of the first bearing member and the second bearing member;
wherein the cooperating surface of the second bearing member or the first bearing member comprises a first region comprising a pumping pattern configured to pump the lubricant;
wherein the cooperating surface of the second bearing member or the first bearing member comprises a second region having a modified pumping pattern or a smooth surface;
wherein the second region is disposed on the cooperating surface of the second bearing member or the first bearing member such that a bearing force generated by the pumping action of the lubricant opposes a radial load force exerted on the self-lubricated sliding bearing to reduce an eccentricity of a longitudinal axis of the first bearing member with respect to a longitudinal axis of second bearing member;
wherein the modified pumping pattern comprises a surface having a groove depth and/or width that becomes continuously shallower around a circumferential length compared to the groove depth and/or width of the pumping pattern of the first region.