A comparison of experimental rotordynamic coefficient and static characteristic results for hole-pattern damper seals and a honeycomb seal /
Even though the use of honeycomb annular seals has been found
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: |
| Summary: | Even though the use of honeycomb annular seals has been found to be an attractive design implementation due to their superior static and dynamic characteristics, some of their disadvantages have been causing inconvenience in industrial practices. These disadvantages include: a) they can take a long time to be manufactured, and b) they can seriously damage the shaft if rubbing occurs. As an alternative to honeycomb seals, "hole-pattern" gas damper seals are proposed and studied. Roughened surface configurations of hole-pattern damper seals are formed by simply drilling holes into an annular smooth seal. The seal stator may be made of high-strength plastic materials which are less likely to damage a shaft during rubbing. Experimental results of the rotoraynamic coefficients for three annular hole-pattern damper seals are presented. A comparison has been made between hole- pattern damper seals and a honeycomb seal. The results presented demonstrate that compared to a honeycomb seal, the hole-pattern damper seal with 3.175mm hole diameter and maximum percentage of the surface area taken up by holes has achieved (a) an average of 12 percent reduction in leakage rate, and (b) considerably higher effective direct damping, especially under high inlet pressure and high speed. |
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| Item Description: | Vita. "Major subject: Mechanical Engineering". |
| Physical Description: | xv, 154 leaves : illustrations ; 28 cm. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |