公开(公告)号：WO1998025123A2

公开(公告)日：1998-06-11

申请号：PCT/US1997022121

申请日：1997-12-05

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  BEAM, Palmer, H. ,  BELANGER, David, J. ,  EILERS, George, J. ,  IMLACH, Joseph

IPC: G01M13/00

CPC classification number: G01M13/04 ,  F16C17/246

Abstract: A bearing monitor for use with a canned motor pump having a wound stator and a rotor drivably coupled to an impeller, the rotor being mounted on radial journal bearings and axial thrust bearings within a containment can comprises a first and a second target embedded in an outer periphery of the rotor in axial proximity to a first and a second end of the rotor. The monitor includes a plurality of sensors mounted external to the containment can in axial proximity to each of the two targets and radially displaced approximately equally around the periphery of the containment can. A plurality of magnetic field generators create local magnetic fields coupled through the containment can, process fluid, rotor, and at least a portion of one target to one of the sensors. In response to each field, each sensor generates an output signal which varies as a result in a change in the magnetic circuit reluctance caused by bearing wear. A monitor circuit is coupled to the sensors and compares their output signals to generate a scaled output which is approximately linearly related to bearing wear. The output of sensors in the same axial plane are utilized to determine bearing wear in a radial direction, while the output of sensors in different axial planes are utilized to determine bearing wear in an axial direction. Electromagnetic shielding may be used depending on the environmental and operating conditions.

Abstract translation: 一种用于具有缠绕定子和可驱动地联接到叶轮上的转子的密封电机泵的轴承监视器，所述转子安装在径向轴颈轴承和位于容纳壳内的轴向推力轴承内可以包括嵌入外部的第一和第二目标 转子的周边轴向靠近转子的第一和第二端。 监视器包括安装在容纳壳体外部的多个传感器，其轴向接近两个目标中的每一个并且围绕容纳罐的周边大致均匀地径向移位。 多个磁场发生器产生通过容纳罐耦合的局部磁场，处理流体，转子以及一个目标的至少一部分传递到传感器之一。 响应于每个场，每个传感器产生一个输出信号，由于轴承磨损引起的磁路磁阻的变化而变化。 监视器电路耦合到传感器，并比较其输出信号以产生与轴承磨损大致线性相关的缩放输出。 在相同的轴向平面中的传感器的输出用于确定径向方向上的轴承磨损，而不同轴向平面中的传感器的输出用于确定轴向方向上的轴承磨损。 可以根据环境和操作条件使用电磁屏​​蔽。