| 摘要 |
<p>A method of determining a leakage in a piston machine comprising at least two pistons (2, 2'), where: the rotational velocity of the piston machine (1) , and therefore the volume flow through the piston machine (1) , is varied periodically as part of a time-limited active test while measuring the differential pressure and the angular position; - an angular position-based Fourier analysis of the measured values from differential pressure and rotational velocity measurements performed during said test are used to experimentally determine the amplitude ratio and phase angle difference between volume flow variations and pressure variations; and said amplitude ratio and phase angle difference are used, together with an angular position-based Fourier analysis of the measurements of differential pressure and rotational speed made after the active test, to determine the amplitude and phase of the leakage flow.</p> |
