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    • 6. 发明授权
    • Contra-rotating bearing device for contra-rotating propeller
    • 反转螺旋桨的反转轴承装置
    • US6056509A
    • 2000-05-02
    • US809339
    • 1998-08-10
    • Mikihiko NakayamaShinichi OhtaniKazuhide OhtaMasayasu MatsudaKeiichi NittaSatoshi KeirimboSatoshi AshidaHideki Shibuya
    • Mikihiko NakayamaShinichi OhtaniKazuhide OhtaMasayasu MatsudaKeiichi NittaSatoshi KeirimboSatoshi AshidaHideki Shibuya
    • B63H5/10B63H23/32F16C17/18F16C32/06F16C33/10F01D1/24
    • F16C32/0651B63H21/386B63H23/321B63H5/10F16C17/02F16C17/18F16C33/1065F16C33/1075B63H2005/106B63H2023/323
    • A hollow portion is provided on the core of an inner shaft (2) to form an oil feed port (3), a plurality of oil feed holes (4) which are connected with both of the outer peripheral face of the inner shaft (2) within a range (L) of the bearing surface of the inner shaft (2) and the oil feed port (3) are radially provided in a line , and axial oil grooves (5) each of which includes an inner shaft surface side opening portion (4a) of the oil feed hole (4) are provided on the outer peripheral face of the inner shaft to form a contra-rotating bearing device for a contra-rotating propeller which causes the inner shaft (2) and an outer shaft (2) to contra-rotate mutually. In place of the oil grooves, a plurality of concave-convex portions may be formed in the axial direction of a contra-rotating bearing on the inner peripheral face of the bearing and circular portions may be provided on both axial ends of the concavo-convex portions to form the contra-rotating bearing device for a contra-rotating propeller. Thus, a sufficient oil film is formed on the bearing surface of the contra-rotating bearing in an area where the inner shaft and the outer shaft rotate in mutually opposite directions at almost equal speeds so that an excellent bearing function can be obtained.
    • PCT No.PCT / JP95 / 01761 Sec。 371日期:1998年8月10日 102(e)日期1998年8月10日PCT 1997年3月6日PCT公布。 公开号WO96 / 07832 日期:1996年3月14日在内轴(2)的芯部上设置有中空部,形成供油口(3),多个供油孔(4) 在内轴(2)的支承面和供油口(3)的范围(L)内的内轴(2)沿径向设置成一条直线,轴向油槽(5) 供油孔(4)的内轴面侧开口部(4a)设置在内轴的外周面上,形成反转螺旋桨的反转轴承装置,该反转轴承装置使内轴(2) 和外轴(2)相互旋转。 代替油槽,可以在轴承的内周面上的反转轴承的轴向上形成多个凹凸部,并且可以在凹凸的两个轴向端部设置圆形部分 部分以形成反向旋转的螺旋桨的反转轴承装置。 因此,在反转轴承的轴承面上,在内轴和外轴以相等的速度相互相反的方向旋转的区域形成有充分的油膜,从而能够获得优异的轴承功能。