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    • 4. 发明授权
    • Method of making lip-type oil seals having improved sealing edge
    • 制造密封边缘改善的唇形油封的方法
    • US5759466A
    • 1998-06-02
    • US648574
    • 1996-05-16
    • Tsunehisa OnumaHideyuki Furuyama
    • Tsunehisa OnumaHideyuki Furuyama
    • F16J15/32B29C37/02
    • F16J15/328F16J15/3244Y10S425/047
    • Lip-type oil seals (10) having helical pumping ribs (40) are manufactured by preparing a molded foreproduct of the seal and by trimming a hat portion (62) to form a sharp sealing edge (32). Each of the pumping ribs (40) is configured to include a first section (50) of a uniform cross-section and a bilge-shaped second section (52). Trimming is made along a trim line (68) that intersects in between the length of the first sections (50) to ensure that a length of the first sections (50) is preserved between the sealing edge (32) and the second sections (52) regardless of the tolerance of positioning of a trimming knife. Oil seals having an improved initial static and dynamic sealing performance is obtained. The second sections (52) achieves a satisfactory pumping action even after a substantial wear has taken place.
    • 具有螺旋排出肋(40)的唇形油封(10)通过制备密封件的模制前置产品和通过修剪帽部分(62)以形成锋利的密封边缘(32)来制造。 每个泵送肋(40)构造成包括均匀横截面的第一部分(50)和舱底形状的第二部分(52)。 沿着与第一部分(50)的长度相交的修剪线(68)进行修整,以确保在密封边缘(32)和第二部分(52)之间保留第一部分(50)的长度 ),而不考虑修剪刀的定位公差。 获得具有改善的初始静态和动态密封性能的油封。 即使在实质磨损发生之后,第二部分(52)也实现令人满意的泵送动作。
    • 10. 发明授权
    • Oil seal
    • 油封
    • US08413995B2
    • 2013-04-09
    • US12595417
    • 2008-02-22
    • Hiroki MatsuiMasayuki TanidaHirotaka MizutaHideyuki FuruyamaKen YoshikawaYuki Sato
    • Hiroki MatsuiMasayuki TanidaHirotaka MizutaHideyuki FuruyamaKen YoshikawaYuki Sato
    • F16J15/32
    • F16J15/324F16J15/3244
    • For an oil seal (1) having a seal lip (6) with a slope (7) at the side of sealed fluid and a slope (8) at the side opposite to the sealed fluid, and a screw section (9) provided on the slope (8) for pushing back sealed fluid by a pumping effect at a time of rotation, in order to achieve low torque characteristics based on fluid lubrication by increasing the thickness of an oil film on sliding surfaces, an intermediate surface (10) is provided between the slopes (7, 8), and an oppositely threaded screw section (11) for sucking the sealed fluid by a pumping effect is provided on the intermediate surface (10) without reaching the boundary (13) between the intermediate surface (10) and the slope (8), so that a threadless region is provided in the entire circumference between the screw section (11) and the boundary (13).
    • 对于具有在密封流体侧具有斜面(7)的密封唇(6)和与密封流体相对的一侧上的斜面(8)的油封(1)和设置在密封件 用于在旋转时通过泵送效果推回密封流体的斜面(8),以便通过增加滑动表面上的油膜的厚度来实现基于流体润滑的低扭矩特性,中间表面(10)是 设置在所述斜面(7,8)之间,并且在所述中间表面(10)上设置用于通过泵送效果吸附所述密封流体的相对螺纹的螺纹部(11),而不到达所述中间表面(10) )和斜面(8),使得在螺杆部分(11)和边界(13)之间的整个圆周上设置无螺纹区域。