| 主权项 |
1. A sealing system comprising:
a seal mounted in a gap between two concentrically mounted, relatively rotatable components, the seal retaining a liquid at an oil side of the seal; a sensor for sensing a parameter of interest associated with the liquid and for providing a sensor signal; a collection trough mounted at an air side of the seal, at a location where any leaked liquid will gather at a bottom of the trough, wherein the sensor is arranged in the trough; and processing means for processing the sensor signal and determining the parameter of interest, wherein, the sensor is a magneto-elastic resonance (MER) sensor, with a magneto-elastic resonator having a first resonating element which vibrates at a first resonant frequency in response to a time-varying magnetic field, wherein the resonator produces a sensor signal in the form of a time-varying magnetic flux signal, dependent on the first resonant frequency, the processing means is adapted to extract the first resonant frequency from the sensor signal and to determine the parameter of interest based on the first resonant frequency wherein the parameter of interest is leakage and the MER sensor is mounted at a location in the trough where at least the first resonating element will come into contact with any liquid that has leaked past the seal, such that a detected shift in the first resonant frequency is indicative of leakage, and an edge of the first resonating element is arranged below a level of maximum permitted leakage and the processing means is adapted to determine a rate of leakage from a detected rate of change in the first resonating frequency. |
