专利检索 ap:("XYLEM IP MANAGEMENT S.À.R.L.") AND inv:"Martin Zetterquist" 第 1 页

1.

发明申请
METHOD FOR SHUTTING OFF A PUMP AS WELL AS PUMP STATION ARRANGEMENT 审中-公开

公开(公告)号：US20170138363A1

公开(公告)日：2017-05-18

申请号：US15318841

申请日：2015-06-15

申请人： XYLEM IP MANAGEMENT S.À.R.L.

发明人： Martin Larsson , Jürgen Mökander , Martin Zetterquist

IPC分类号： F04D15/00 , F04D13/08 , F04D29/18 , F04D15/02

CPC分类号： F04D15/0066 , F04B49/02 , F04B49/20 , F04D1/00 , F04D13/086 , F04D15/0083 , F04D15/0218 , F04D29/18 , F05D2270/042

摘要： A pump station arrangement and a method for turning off a pump configured for pumping liquid via a conduit. The pump, before being turned off, being driven at an operational frequency (FN) by a control unit. The method is characterized by the steps of, ramping down the frequency of the pump due to a turn off instruction, the terminal frequency of the ramping down being equal to the operational frequency (FN) of the pump minus at least 10 Hz and the ramping down time being at least a reflection time (TR) for the conduit in question, and the terminal frequency of the ramping down not being less than 10 Hz, and stopping the pump after the ramping down.