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Construction of lubrication diagnostic system supported by ultrasonic technique

Research Project

Project/Area Number 10650152
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 設計工学・機械要素・トライボロジー
Research InstitutionKochi University of Technology

Principal Investigator

TAKEUCHI Akitoshi  Kochi University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30206940)

Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1998: ¥200,000 (Direct Cost: ¥200,000)
KeywordsTribology / Ultrasonic technique / Acoustic emission / Lubrication diagnosis / Mixed lubrication / Solid contact area / Contact condition / キャビテーション / 荷重分担比 / 気泡 / 摩耗粉 / 電気抵抗法 / AE法
Research Abstract

The construction of the new lubrication diagnostic system which combined ultrasonic technique, friction and A.E.was tried in order to enable the diagnosis of lubricated condition from the region initial stage of mixed lubrication to boundary lubrication.
For the lubrication evaluation, the areal index which depended on pulse amplitude of ultrasonic wave reflected from sliding surface was used. Then, following fact clarified from the estimation of the contact condition based on the change of areal index.
1) By the consideration of areal index for center frequency of the 1 wavelength without waveform distortion and of the stiffness of contacting surface, the base of convenient area measuring method which could estimate solid contact area ratio regardless of roughness and topography of the surface was able to be established.
2) From the difference between local field areal index measured by the point focus type probe which could limit the incidence area of the ultrasonic wave to the part of contact surface, the friction in local part on the sliding surface was known, and the drawing of the friction distribution diagram became possible.
3) From the measurement of the reflectivity of the transversal wave which does not propagate through the oil, the possibility of quantitatively estimation of load sharing ratio under the mixed lubrication was clarified.
4) On the basis of the correlation between areal index and friction, transfer of the abrasion powder and formation condition of the oxide film on the sliding surface would be able to be estimated.
5) By UT-AE lubrication diagnostic technique which combined ultrasonic method with the AE method, the in situ measurement of the quality of contact condition of friction surface became possible. Then, the risk evaluation of the lubricating surface by the comparison with measured friction was possible.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 竹内彰敏: "超音波法による固体接触面積の測定"日本機械学会論文集(C編). 65・640. 4767-4773 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] A.Takeuchi: "Recognition of Transferred Wear Particles by Roughness Measurement with Tactile Sensor Function"International Tribology Conference NAGASAKI 2000. 402 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Kimura: "Application of New Tribological Maintenance Tools to a Multi-Plant Maintenance System"International Tribology Conference NAGASAKI 2000. 384 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akitoshi TAKEUCHI, Mitsumasa SATOH, Motohisa ONOZAWA, Yasunori SUGAWARA, Hiroshi AOKI: "Measurement of Contact Area using ultrasonic Technic"Transactions of the Japan Society of Mechanical Engineering. 65, 640, C. 4767-4773 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Akitoshi TAKEUCHI, Sadao OMATA: "Recognition of Transferred Wear Particles by Roughness Measurement with Tactile Sensor Function"International Tribology Conference NAGASAKI 2000. 402 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Kimura, T.Wakabayashi, Y.Iwai, T.Honda, A.Takeuchi, I.Minami, A.Korenaga: "Application of New Tribological Maintenance Tools to a Multi-Plant Maintenance System"International Tribology Conference NAGASAKI 2000. 384 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 竹内彰敏: "超音波法による固体接触面積の測定"日本機械学会論文集(C編). 65・640. 4767-4773 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 竹内 彰敏: "超音波法による固体接触面積の測定"日本機械学会論文集(C編). 65・640. 4767 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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