Small particle impingement comparator and method of determining numerical estimation of a steam path component surface roughness
AssigneeGeneral Electric Company
InventorChris R. Bron
Life of this patent
Estimating the term…
Abstract
A small particle impingement comparator for surface finishes in excess of 1000 micro-inches standardizes the evaluation of such surface finishes within a turbine steam path. The small particle impingement comparator includes a plurality of sample cells arranged side-by-side in ascending order of roughness from 1190 micro-inches to 6950 micro-inches. With this comparator, users can compare the steam path component surface roughness with the roughness of the plurality of sample cells using a visual and tactile feel comparison.
Claims10
A small particle impingement comparator comprising a plurality of sample cells arranged side-by-side in ascending order of roughness from 1190 micro-inches to 6950 micro-inches, the sample cells comprising surface patterns that replicate surface conditions as if produced via small particle impingement.
A small particle impingement comparator comprising ten sample cells arranged in ascending order of roughness and having roughness values exceeding 1000 micro-inches, the sample cells comprising surface patterns that replicate surface conditions as if produced via small particle impingement.
A method of determining a numerical estimation of a steam path component surface roughness in micro-inches, root mean squared, the method comprising:
- forming a plurality of sample cells in ascending order of roughness from 1190 micro-inches to 6950 micro-inches, the sample cells comprising surface patterns that replicate surface conditions as if produced via small particle impingement;
- and
- comparing the steam path component surface roughness with the roughness of the plurality of sample cells using a visual and tactile feel comparison.
Dependencies are inferred from the claim text.