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    • 1. 发明授权
    • Rotational control apparatus
    • 旋转控制装置
    • US5636719A
    • 1997-06-10
    • US373953
    • 1995-01-17
    • John B. DavisRobert C. BredtKent CarlsonDarren Reasy
    • John B. DavisRobert C. BredtKent CarlsonDarren Reasy
    • F01P7/08F16D25/0638F16D67/04H02K49/04F01P7/02F16D47/00
    • H02K49/046F01P7/085F16D25/0638F16D67/04
    • Rotational control apparatus in the forms of fan clutches (A, A') are shown including an eddy current drive (224). Specifically, the eddy current drive (224) includes a plurality of permanent magnets (226) mounted circumferentially spaced and with alternating polarity by a holder (228) to the input or output of the clutch (A, A') and a magnetically conductive ring (242) mounted to the other of the input or output of the clutch (A, A'). Thus, the output portion and the fan blades mounted thereto are driven at engine speeds when the clutch (A, A') is air actuated and are driven at a rotational speed less than engine speed by the eddy current drive (224) when the clutch (A, A') is not air actuated and without separate controls for the eddy current drive (224). A housing (62) comprises the output portion of the clutch (A) which is rotatably mounted by a bearing (58) to the hub portion (24) of a friction disc (28) which comprises the input portion of the clutch (A). In other forms, the output portion of the clutch (A') is in the form of a hub (20') rotatably mounted on a stationary shaft (24') and the input portion is in the form of a sheave (50') rotatable relative to the hub (20') and the shaft (24'). Additionally, the hub (20') can be braked by rotatably relating the hub (20') to the shaft (24'). In one form, the friction ring (252) includes peripheral gear teeth (256) in slideable gearing relation with gear teeth (250) formed in the housing (62) and is formed of fiber brake material to act as a dampener between the friction disc (28) and the housing (62) to absorb torsional vibration.
    • 示出了风扇离合器(A,A')形式的旋转控制装置,其包括涡流驱动器(224)。 具体地说,涡流驱动器(224)包括多个永磁体(226),该多个永久磁铁(226)通过保持器(228)与离合器(A,A')的输入或输出端周向间隔开并具有交替极性,并且具有导电环 (242),安装到离合器(A,A')的输入或输出中的另一个。 因此,当离合器(A,A')被空气致动时,安装在其上的输出部分和风扇叶片以发动机转速被驱动,并且当离合器(A,A')被驱动时,通过涡流驱动器(224)以小于发动机转速的转速被驱动 (A,A')不是空气致动的,并且没有用于涡流驱动器(224)的单独控制。 壳体(62)包括离合器(A)的输出部分,其通过轴承(58)可旋转地安装到包括离合器(A)的输入部分的摩擦盘(28)的轮毂部分(24) 。 在其他形式中,离合器(A')的输出部分为可旋转地安装在固定轴(24')上的轮毂(20')的形式,并且输入部分是轮(50')的形式, 可相对于毂(20')和轴(24')旋转。 此外,轮毂(20')可以通过将轮毂(20')可旋转地联接到轴(24')而被制动。 在一种形式中,摩擦环(252)包括与形成在壳体(62)中的齿轮齿(250)可滑动的齿轮齿(256)的周边齿轮齿(256),并且由纤维制动材料形成,以用作摩擦盘 (28)和壳体(62)以吸收扭转振动。