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1. 发明授权

US4915579A Pump sealing apparatus 失效
标题翻译：泵密封装置
公开(公告)号：US4915579A
公开(公告)日：1990-04-10
申请号：US232626
申请日：1988-08-15
申请人： John D. Whittier , G. Michael Wilfley , Irvin F. Zagar
发明人： John D. Whittier , G. Michael Wilfley , Irvin F. Zagar
IPC分类号： F04D29/14 , F16J15/00 , F16J15/16
CPC分类号： F16J15/164 , F04D29/146 , F16J15/008
摘要： A centrifugal pump of the hydraulic sealing type has a novel and improved sealing apparatus for establishing a hydraulic seal and limiting the flow of liquid from a pump casing into a reservoir or seal housing at one end of the pump casing, and a valve assembly in the seal housing has a valve member normally urged into engagement with the seal housing to isolate liquid in the seal housing from the casing when the pump is not in operation. When the pump is activated and brought up to speed, centrifugal force-responsive pivot members are operative to move the valve member away from sealed engagement with the seal housing to establish fluid communication between the seal housing and pump casing. The force-responsive pivot members are fully enclosed so as to be completely isolated from the liquid in the seal housing and yet be capable of operating directly in opposition to the resilient or spring-loaded valve to move the valve away from sealed engagement with the seal housing. An expeller ring at one end of the seal housing limits liquid flow into the seal housing when the pump is stopped and removes any liquid in the reservoir into the pump casing when the pump is started.

2. 发明授权

US4634344A Multi-element centrifugal pump impellers with protective covering against corrosion and/or abrasion 失效
标题翻译：具有防腐蚀和/或磨损保护层的多元件离心泵叶轮
公开(公告)号：US4634344A
公开(公告)日：1987-01-06
申请号：US637572
申请日：1984-08-03
申请人： Irvin F. Zagar , Henry T. Choquette
发明人： Irvin F. Zagar , Henry T. Choquette
IPC分类号： F04D29/22 , F04D1/04
CPC分类号： F04D29/2222 , F04D29/2294
摘要： A pump of centrifugal type having both an impeller unit and an expeller unit coupled together for effecting frictionless hydraulic seal during operation within an appropriate housing therefor. By providing an expeller unit separate from the impeller unit, the portions of the impeller unit which wear fastest can be replaced as needed without the need for replacing other components as soon. This greatly reduces the cost of maintenance and replacement. Also, rotor vanes and stacked separator discs in a preferred embodiment provide for greatly reduced manufacturing and assembly costs, and yet allow the flexibility of easy replacement of only parts that are severely worn or corroded as needed. Both the method of making and the method of assembly are encompassed by this invention.Furthermore, all of the component elements are preferably rubber covered for maximum protection against abrasion and corrosive action of the liquid being pumped.
摘要翻译：一种离心式泵，其具有联接在一起的叶轮单元和推进器单元，用于在其适当的壳体内的操作期间实现无摩擦的液压密封。通过提供与叶轮单元分离的排出单元，可以根据需要更换磨损最快的叶轮单元的部分，而不需要立即更换其它部件。这大大降低了维护和更换的成本。此外，在优选实施例中，转子叶片和堆叠的分离盘提供了大大降低的制造和组装成本，并且允许容易地更换仅需要严重磨损或被腐蚀的部件的灵活性。制造方法和组装方法都包括在本发明中。此外，所有组分元件优选地被橡胶覆盖以最大限度地防止被泵送的液体的磨损和腐蚀作用。

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