Effect of surface roughness of mechanical seals under blood sealing

Jun Tomioka, Norifumi Miyanaga

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    A miniature mechanical seal with cooling water circulating system has been developed as a shaft seal for rotary blood pumps. The present paper describes the establishment of the experimental methods under blood sealing and the estimation of the effect of the surface roughness on the shaft seal problems, especially in the increase of the friction and the leakage. Micro-leakage rates of the blood and the cooling water were measured by an ion chromatography. In this method, the ion concentration was converted into the leakage rate. The frictional loss torque was measured by a torque meter. Results are provided with three types of surface roughness, Ra = 0.009 μm, Ra = 0.088 μm and Ra = 0.170 μm. It is shown that as the surface roughness increases the leakage decreases while the frictional loss torque increases under blood sealing. The best surface roughness in the torque and the leakage characteristics were different.

    Original languageEnglish
    Pages (from-to)443-452
    Number of pages10
    JournalLubrication Science
    Volume22
    Issue number10
    DOIs
    Publication statusPublished - 2010 Nov

    Fingerprint

    Sealing (closing)
    Seals
    Blood
    Surface roughness
    Torque
    Cooling water
    Torque meters
    Ion chromatography
    Pumps
    Ions
    Friction

    Keywords

    • blood sealing
    • leakage characteristics
    • mechanical seal
    • rotary blood pumps
    • surface roughness
    • torque characteristics

    ASJC Scopus subject areas

    • Materials Chemistry
    • Surfaces, Coatings and Films

    Cite this

    Effect of surface roughness of mechanical seals under blood sealing. / Tomioka, Jun; Miyanaga, Norifumi.

    In: Lubrication Science, Vol. 22, No. 10, 11.2010, p. 443-452.

    Research output: Contribution to journalArticle

    Tomioka, Jun ; Miyanaga, Norifumi. / Effect of surface roughness of mechanical seals under blood sealing. In: Lubrication Science. 2010 ; Vol. 22, No. 10. pp. 443-452.
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