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2. 发明公开

EP1222393A1 SUBMERSIBLE MOTOR WITH SHAFT SEALS 有权
标题翻译：带轴密封的潜水电机
公开(公告)号：EP1222393A1
公开(公告)日：2002-07-17
申请号：EP00968505.8
申请日：2000-09-29
申请人： Lawrence Pumps Inc.
发明人： ANDREWS, Dale , RUSSELL, Paul , WITZGALL, Michael
IPC分类号： F04B17/00
CPC分类号： F04D29/108 , F04D13/086 , F04D29/106
摘要： A submersible electric motor driven pump has a motor chamber and a pump chamber separated by a seal chamber. Inboard and outboard shaft seals(MS1,MS2) immersed in an oil buffer fluid within the seal chamber restricts the flow of liquid from the seal chamber into the pump and motor chambers. An integral or externally mounted pre-pressurized buffer fluid reservoir (PA) maintains a positive fluid pressure in the seal chamber relative to the external pressure at working depth, and maintains a suitable buffer fluid level within the seal chamber, in order to prevent the ingress of the pumped media through the outboard seal(MS2). A unique impeller design (631) circulates fluid within the seal chamber in the region of the outboard shaft seal (MS2), allowing continuous dry run operation when used in conjunction with an integrally cooled motor design. A cartridge shaft sleeve subassembly, having a bearing (3) configured between the inboard and outboard seals (MS1,MS2), facilitates maintenance.
摘要翻译：潜水式电动马达驱动泵具有由密封室隔开的马达室和泵室。浸入密封室内的油缓冲液中的内侧和外侧轴密封件（MS1，MS2）限制液体从密封室进入泵室和马达室的流动。整体或外部安装的预加压缓冲液储液器（PA）相对于工作深度处的外部压力保持密封腔室内的正流体压力，并且在密封腔室内保持合适的缓冲液液位，以防止进入泵送的介质通过外侧密封（MS2）。独特的叶轮设计（631）使密封腔内的流体在外侧轴密封（MS2）的区域内循环流动，当与一体式冷却电机设计结合使用时允许连续空转运行。具有配置在内侧和外侧密封件（MS1，MS2）之间的轴承（3）的筒轴衬套子组件便于维护。

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