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    PLANETARY GEAR FOR A TRANSMISSION FOR AN AIRCRAFT CAPABLE OF HOVERING
    4.
    发明公开
    PLANETARY GEAR FOR A TRANSMISSION FOR AN AIRCRAFT CAPABLE OF HOVERING 审中-公开

    公开(公告)号：EP4063267A1

    公开(公告)日：2022-09-28

    申请号：EP21164529.6

    申请日：2021-03-24

    申请人： LEONARDO S.p.A.

    发明人： MONTAGNA, Federico ,  PODDA, Daniele ,  SCALTRITTI, Diego

    IPC分类号： B64C27/12 ,  F16H57/04 ,  F16H57/08 ,  F16C33/36 ,  F16C19/38 ,  F16C23/08 ,  F16C33/30 ,  F16C33/46 ,  F16C33/48 ,  F16C33/58 ,  F16C33/66 ,  F16C33/78

    摘要： A description is provided of a planetary gear (21) comprising a sun (15) rotatable around a first axis (B), a crown (17) angularly fixed with respect to the first axis (B); two satellites (19) that are meshing, rotatable around respective second axes (I); a satellite carrier (30) rotatable around the first axis (B) and comprising at least two first pins (32) with respect to which the satellites (19) are rotatable around respective third axes (I); and a plurality of bearings (40) comprising: a first ring (41) defining a first raceway (42) that is at least partially spherical; a second ring (43) defining a second raceway (44); and a plurality of rolling bodies (45; 46) shaped as an hourglass rolling on the first spherical raceway (42) and a second raceway (44); each rolling body (45; 46) being in contact with the raceways (42, 44) at a line (L1; L3, L2, L4) with axial ends (61; 63, 62; 64) lying on respective straight lines (R1; R3, R2; R4) tilted between them and converging in a point (S1; S2) lying on a median plane (PI; P2) of the rolling body (45; 46) and on the second axis (I); the straight lines (R1, R3; R2, R4) define a first angle (α1; α2), whose bisector (T1; T2) lies on the first median (PI; P2).

    BEARING HOUSING AND ITS APPLICATION
    6.
    发明公开
    BEARING HOUSING AND ITS APPLICATION 审中-公开

    公开(公告)号：EP3992481A1

    公开(公告)日：2022-05-04

    申请号：EP21203618.0

    申请日：2021-10-20

    申请人： Aktiebolaget SKF

    发明人： Liu, Jiakai ,  Cao, Weiguang ,  Xu, Zongkang ,  Geng, Weifei

    IPC分类号： F16C13/00 ,  F16C23/08 ,  F16C33/36 ,  F16C35/067 ,  F16C37/00 ,  F16J15/00 ,  B22D11/00

    摘要： A bearing housing (10) is provided with a cooling channel (1) in at least part of the circumference around the bearing (20). The cooling channel is provided with a flow guide member at least in part of its flow section to construct a tortuous passage whose flow distance is longer than the corresponding circumferential length of the flow section. On the basis of the above-mentioned bearing housing, the present invention also provides a bearing housing unit (30), a continuous casting roll line (100) and a continuous casting machine that use the bearing housing. The above-mentioned bearing housing adopts an optimized cooling channel design, which can obtain a better cooling effect without changing other structures of the bearing housing. Therefore, it is particularly suitable for upgrading existing equipment and has a huge cost advantage and a wide range of application prospects.

    DOUBLE-ROW SELF-ALIGNING ROLLER BEARING
    9.
    发明公开
    DOUBLE-ROW SELF-ALIGNING ROLLER BEARING 审中-公开

    公开(公告)号：EP3660343A1

    公开(公告)日：2020-06-03

    申请号：EP18838014.1

    申请日：2018-07-25

    申请人： NTN Corporation

    发明人： SEKO, Kazumasa ,  INOUE, Yasuyuki ,  YAMAMOTO, Takashi ,  HORI, Michio

    IPC分类号： F16C23/08 ,  F16C33/36 ,  F16C33/46 ,  F16C33/58

    摘要： The double-row self-aligning roller bearing includes an outer ring having a spherical raceway surface, and each of rollers in two rows has an outer peripheral surface whose cross-sectional shape corresponds to the raceway surface of the outer ring. The rollers in the two rows have different lengths from each other, and the length of the longer rollers is equal to or greater than 36% of a bearing width. A ratio of a contact angle of the shorter rollers relative to a contact angle of the longer rollers is within a range of 1:4 to 1:2. The contact angle of the shorter rollers has a range of 3° to 5°, and the contact angle of the longer rollers has a range of 11° to 14°.