公开(公告)号：US20190301435A1

公开(公告)日：2019-10-03

申请号：US16301456

申请日：2017-06-14

Applicant: Vestas Wind Systems A/S

Inventor： Kim Sveinsson Sørensen ,  Flemming Væversted Jørgensen ,  Olaf Brinckmann

IPC: F03D80/70 ,  H02K5/15 ,  H02K5/173 ,  H02K7/08 ,  H02K7/18 ,  F03D9/25 ,  F16C33/66

Abstract: The present invention relates to wind turbine generator (WTG) with a ball bearing (31) supporting a rotating shaft. A suction provider (35), e.g. a rotating disc, is provided next to the ball bearing. An opposite grease reservoir (41) supplies the ball bearing with grease during rotational operation, the grease reservoir further having a shape so that a point (43) of the at least one grease reservoir being closest to the rotating shaft and a grease inlet of the ball bearing are adjoining. The suction provider creates a pressure which is slightly lower than atmospheric pressure, thereby creating a suction of grease (47) through the ball bearing from the grease reservoir, which aids in distributing the grease in the ball bearing. The invention provides an improved ball bearing having an extended lifetime of up to e.g. 7-10 years.