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2. 发明授权

US3938913A Flow machine for an aggressive, radioactive or special-purity flow medium 失效
标题翻译：流动机用于侵蚀性，放射性或特殊纯度流动介质
公开(公告)号：US3938913A
公开(公告)日：1976-02-17
申请号：US316899
申请日：1972-12-20
申请人： Gerhard Isenberg , Peter Bloch , Wolfgang Tuzinsky
发明人： Gerhard Isenberg , Peter Bloch , Wolfgang Tuzinsky
IPC分类号： F04D3/00 , F04D13/06 , F16C39/06 , F04B17/00
CPC分类号： F16C32/0444 , F04D13/0646 , F04D3/00 , F16C32/047 , F16C2300/42 , F16C2360/44
摘要： A flow machine for pumping and/or measuring the flow of agressive, radioactive, or special-purity flow mediums. The flow machine is provided with a rotatable impeller magnetically supported within a machine casing such that the impeller is spaced at all points from the inside walls of the machine casing. The casing inside walls and the outer configuration of the impeller include a central cylindrical center section joined by conically outwardly flared end sections. Electromagnetics are arranged in the conical flared section outside of the inside wall for cooperation with magnetic material arranged in the corresponding conically flared sections of the impeller to support the impeller in position. The conically flared section facilitate both radial and axial support of the impeller, since both axial and radial components of electromagnetic force is experienced at the conically flared sections of the impeller. Means are provided to detect the gaps around the circumference of the impeller between the impeller and the casing inside walls, which means provide signals to an electronic device for controlling the respective current supply to the electromagnets so as to assure the maintenance of a substantially uniform circumferential gap around the impeller for all operating conditions. In one embodiment, the flow machine is constructed as an axial flow pump driven by an asynchronous electric motor having a rotor formed around the cylindrical section of the impeller and a stator arranged outside of the inside walls along the cylindrical section thereof. A further embodiment of the flow machine is constructed as a flow meter which includes means for detecting the rotational speed of the impeller, which rotational speed is a direct function of the volumetric flow and/or velocity of the flow medium through the impeller.
摘要翻译：用于泵送和/或测量流动的流动的流动机，它们具有积极的，放射性的或特殊纯度的流动介质。流动机设置有可旋转的叶轮，其磁力地支撑在机壳内，使得叶轮在与机器壳体的内壁的所有点处间隔开。壳体内壁和叶轮的外部结构包括由圆锥形向外扩张的端部部分连接的中心圆柱形中心部分。电磁学被布置在内壁外部的锥形扩张部分中，用于与布置在叶轮的相应锥形截面中的磁性材料配合以将叶轮保持在适当位置。由于在叶轮的锥形扩张部分处经历电磁力的轴向和径向分量，因此锥形扩口部分有助于叶轮的径向和轴向支撑。提供了用于检测叶轮和壳体内壁之间的叶轮周围的间隙的装置，这意味着向电子装置提供信号，以控制对电磁体的相应电流供应，以确保维持基本上均匀的圆周所有操作条件下叶轮周围的间隙。在一个实施例中，流动机被构造为由具有围绕叶轮的圆柱形部分形成的转子的异步电动机驱动的轴流泵，以及沿其圆柱形部分布置在内壁外侧的定子。流动机的另一实施例被构造为流量计，其包括用于检测叶轮的转速的装置，该转速是通过叶轮的流动介质的体积流量和/或速度的直接函数。

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