Vacuum pump
    22.
    发明授权
    Vacuum pump 失效
    真空泵

    公开(公告)号:US06964560B2

    公开(公告)日:2005-11-15

    申请号:US10490870

    申请日:2001-12-14

    Abstract: An object of this invention is to prevent drop of life of a bearing by an axial force when using a pump as a compressor. In a vacuum pump 1 compressing and discharging gas in a direction of a rotor axis by rotation of screw rotors 3, 4 engaged together which are supported rotatably in a casing 2, balance pistons 13, 14 are disposed on shafts 6, 7 of said screw rotors at inlet side of said casing. The balance pistons separate a receiving section 17 at area of the screw rotor and a pressurizing section 16 at area of the balance piston, and a thrust force of the screw rotors at a pressurizing condition is canceled by acting the discharge pressure in the pressurizing section. The pump is used as a compressor when the discharge pressure is acted on the balance pistons 13, 14. When the pump is used as a vacuum pump, air at discharge side is sucked as cool air through a cooler toward a place near to the discharge side of the receiving section 17 at area of the screw rotor.

    Abstract translation: 本发明的目的是在使用泵作为压缩机时防止轴承的寿命下降。 在真空泵1中,通过可旋转地支撑在壳体2中的螺旋转子3,4的接合的螺杆转子3,4的旋转,在转子轴线的方向上压缩和排出气体,平衡活塞13,14设置在所述螺杆的轴6,7上 所述壳体入口侧的转子。 平衡活塞在螺杆转子的区域和在平衡活塞的区域处的加压部16分离接收部17,并且通过作用加压部中的排出压力来消除螺杆转子在加压条件下的推力。 当排出压力作用在平衡活塞13,14上时,泵用作压缩机。 当泵用作真空泵时,在螺旋转子的区域处,排出侧的空气通过冷却器作为冷空气被吸入靠近接收部17的排出侧的位置。

    Scroll type compressor apparatus with adjustable axial gap
    27.
    发明授权
    Scroll type compressor apparatus with adjustable axial gap 失效
    涡旋式压缩机具有可调的轴向间隙

    公开(公告)号:US06461129B2

    公开(公告)日:2002-10-08

    申请号:US09791515

    申请日:2001-02-23

    Applicant: David Liu

    Inventor: David Liu

    Abstract: A scroll type apparatus for fluid displacement is disclosed. In one embodiment, the apparatus includes an adjustment mechanism capable of being adjusted after assembly of the apparatus to close an axial gap between scroll members and account for manufacturing tolerances in apparatus components. In another embodiment, the apparatus includes an orbital scroll of two portions, with a supporting portion surrounding an eccentric bearing of higher density than that of a scroll portion. The center of mass of the orbital scroll is thus moved towards the eccentric bearing to reduce torquing of the scroll as it orbits. In a further embodiment, the apparatus includes an orbital scroll having two portions, a supporting portion surrounding an eccentric bearing having a lower coefficient of thermal expansion than that of a scroll portion, to reduce thermal expansion of the supporting portion, reducing misaligmnent of the eccentric orbital scroll on the bearing.

    Abstract translation: 公开了一种用于流体排放的涡旋式装置。 在一个实施例中,该装置包括调节机构,该调节机构能够在组装装置之后进行调整,以封闭涡旋构件之间的轴向间隙并考虑到设备部件中的制造公差。 在另一个实施例中,该装置包括两个部分的轨道涡卷,其中一个支承部分围绕一个比涡卷部分密度高的偏心轴承。 因此,轨道涡旋体的质心向着偏心轴承运动,以减小涡卷在其轨道运动时的扭矩。 在另一实施例中,该装置包括具有两部分的轨道涡旋件,围绕偏心轴承的支撑部分,该偏心轴承具有比涡旋部分的热膨胀系数低的热膨胀系数,以减少支撑部分的热膨胀,减少偏心的误差 轴承上的轨道滚动。

    Multiple speed fluid motor
    30.
    发明授权
    Multiple speed fluid motor 失效
    多速液压马达

    公开(公告)号:US5137438A

    公开(公告)日:1992-08-11

    申请号:US687287

    申请日:1991-04-18

    CPC classification number: F04C2/105 F05C2201/0442

    Abstract: A multiple speed fluid motor includes a housing having an inlet port for receiving high pressure fluid and an exhaust port for exhausting low pressure fluid, and a gerotor gear set. An output shaft is supported for rotation relative to the housing. One of the gerotor gears is coupled with the output shaft for rotating the output shaft in response to fluid being supplied to the inlet port. The motor includes fluid passages for conducting fluid to the fluid displacement means. A control valve member is movable to control fluid flow through the fluid passages to control the rotational speed of the output shaft. The control valve member is mounted in a valve chamber defined by a plurality of plates.

    Abstract translation: 多速流体马达包括具有用于接收高压流体的入口和用于排出低压流体的排气口和齿轮齿轮组的壳体。 输出轴被支撑以相对于壳体旋转。 一个摆线齿轮与输出轴结合,用于响应于供应到入口的流体而旋转输出轴。 马达包括用于将流体传导到流体移动装置的流体通道。 控制阀构件可移动以控制通过流体通道的流体流动,以控制输出轴的转速。 控制阀构件安装在由多个板限定的阀室中。

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