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公开(公告)号：US08602759B2
公开(公告)日：2013-12-10
申请号：US13264021
申请日：2010-04-13
CPC分类号： F04C18/16 , F04C25/02 , F04C28/26 , F04C29/126
摘要： A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber. Further, an overpressure outlet provided, which comprises an overpressure opening in a side wall of the suction chamber. Further, an overpressure valve is arranged in the overpressure outlet. The width (b) of the overpressure opening in the longitudinal direction of the screw rotors is smaller than or equal to a tooth width (B) of the screw rotors.
摘要翻译： 特别是用于压缩大气压力的螺杆真空泵包括限定吸入室的泵壳体。 两个啮合的螺杆转子布置在吸入室中。 此外，提供了一个超压出口，其包括在吸入室的侧壁中的过压开口。 此外，超压阀配置在超压出口。 螺杆转子的长度方向上的超压开口的宽度（b）小于或等于螺杆转子的齿宽（B）。
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公开(公告)号：US20120039737A1
公开(公告)日：2012-02-16
申请号：US13264021
申请日：2010-04-13
IPC分类号： F01C1/16
CPC分类号： F04C18/16 , F04C25/02 , F04C28/26 , F04C29/126
摘要： A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber. Further, an overpressure outlet provided, which comprises an overpressure opening in a side wall of the suction chamber. Further, an overpressure valve is arranged in the overpressure outlet. The width (b) of the overpressure opening in the longitudinal direction of the screw rotors is smaller than or equal to a tooth width (B) of the screw rotors.
摘要翻译： 特别是用于压缩大气压力的螺杆真空泵包括限定吸入室的泵壳体。 两个啮合的螺杆转子布置在吸入室中。 此外，提供了一个超压出口，其包括在吸入室的侧壁中的过压开口。 此外，超压阀设置在超压出口。 螺杆转子的长度方向上的超压开口的宽度（b）小于或等于螺杆转子的齿宽（B）。
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