发明名称 |
Method and system for detection and localization of a fluid related to a piston machine |
摘要 |
A method for detecting and localizing a valve leak in a piston machine having a shaft includes: attaching one or more vibration sensor to a valve block of the piston machine; measuring the vibrations from at least one of the vibration sensors; attaching a sensor to the piston machine where the sensor is designed to produce, directly or indirectly, an angular shaft position signal for the shaft; determining, directly or indirectly, an angular shaft position signal for the shaft; transforming vibration signals from the one or more vibration sensors into one envelope signal representing an instant vibration level; using the angular position signal for constructing window functions that pick the envelope signal in selected angular shaft sectors; using the window functions to find sector based averages of the vibration level; and comparing said averages with a critical ambient vibration level to detect and localize leaks in one or two valves. |
申请公布号 |
US9476417(B2) |
申请公布日期 |
2016.10.25 |
申请号 |
US201113988909 |
申请日期 |
2011.11.18 |
申请人 |
NATIONAL OILWELL VARCO NORWAY AS |
发明人 |
Kyllingstad Åge;Nessjøen Pål Jacob |
分类号 |
F04B49/00;G01M7/02;G01H1/12;G06F17/40;G06F19/00;F04B51/00;G01H1/00;G01M3/24 |
主分类号 |
F04B49/00 |
代理机构 |
Conley Rose, P.C. |
代理人 |
Conley Rose, P.C. |
主权项 |
1. A method for detecting and localizing a valve leak in a piston machine having a shaft, comprising:
attaching one or more vibration sensors to a valve block of the piston machine; measuring vibrations from at least one of the vibration sensors; attaching a sensor to the piston machine where the sensor is configured to produce, directly or indirectly, an angular shaft position signal for the shaft; determining, directly or indirectly, an angular shaft position signal for the shaft; transforming vibration signals from the one or more vibration sensors into one envelope signal representing an instant vibration level; using the angular position signal for constructing window functions that pick the envelope signal in selected angular shaft sectors; using the window functions to find sector based averages of the vibration level, and comparing said averages with a critical ambient vibration level to detect and localize leaks in one or two valves. |
地址 |
Sandnes NO |