公开(公告)号：US09745979B2

公开(公告)日：2017-08-29

申请号：US13859899

申请日：2013-04-10

申请人： ITT MANUFACTURING ENTERPRISES LLC

发明人： Anthony E. Stavale ,  Robert Semidey

IPC分类号： F04C28/28 ,  F04C14/28

CPC分类号： F04C28/28 ,  F04C14/28 ,  F04C2270/025 ,  F04C2270/03 ,  F04C2270/052 ,  F04C2270/86

摘要： Techniques are provided for protecting a rotary positive displacement pump, e.g., using a signal processor that receives signaling containing information about power, torque, speed, viscosity and specific gravity related to the operation of a pump; and determines whether to enter an enhanced pump protection mode for the rotary positive displacement pump based at least partly on a relationship between an actual corrected tune ratio and a tuned ratio set point (Tune Ratio SP). The signal processor may determine if the actual corrected tune ratio is less than or equal to the actual corrected tune ratio set point (Tune Ratio SP), and if so, then to enter the enhanced pump protection mode, else continues to use a basic pump protection mode, and also determines the actual corrected tune ratio based upon a ratio of an actual corrected power (PAcorr) divided by a tuned corrected power (PTcorr) at a specific operating speed.