Methods and apparatus for estimating useful life of a seal
AssigneeFisher Controls International LLC
InventorShawn William Anderson
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for estimating useful life of a seal in a process control device are disclosed. An example method includes establishing a plurality of travel ranges of a stem or shaft of a process control device. Each travel range corresponds to different values corresponding to stresses experienced by the seal of the process control device during an operational cycle. The example further includes determining a count of operational cycles associated with each of the travel ranges and estimating a total amount of useful life of the seal consumed based on the counts.
Claims20
A method of estimating useful life of a seal in a process control device, comprising:
- determining a plurality of operational cycles of a stem or shaft of the process control device;
- determining a value corresponding to a stress experienced by the seal for each of the operational cycles;
- and
- estimating a total amount of useful life of the seal consumed based on each of the values.
A method of estimating useful life of a seal in a process control device, comprising:
- establishing a plurality of travel ranges of a stem or shaft of the process control device, each travel range corresponding to different values corresponding to stresses experienced by the seal during an operational cycle;
- determining a count of operational cycles associated with each of the travel ranges;
- and
- estimating a total amount of useful life of the seal consumed based on the counts.
An article of manufacture storing machine readable instructions which, when executed, cause a machine to:
- determine a plurality of operational cycles of a stem or shaft of a process control device;
- determine a value corresponding to a stress experienced by a seal of the process control device for each of the operational cycles;
- and
- estimate a total amount of useful life of the seal consumed based on each of the values.
Dependencies are inferred from the claim text.