PTFE, öncelikle düşük
bir sürtünme katsayısına sahip olması ve çok geniş bir sıcaklık sahası boyunca
stick-slip hareketine maruz kalmaması nedeniyle kuru yatak malzemesi olarak
yaygın bir şekilde kullanılmaktadır. Bu çalışmada grafit ve bronz katkılı PTFE'den
imal edilmiş bir kaymalı yatak burcunun çelik bir muyluya karşı sürtünme
katsayısı bir deney düzeneğinde tayin edilip, hız ve sıcaklık artışıyla
değişimleri incelenmiştir. Deneyler sonucu sürtünme katsayısının nisbeten küçük
hız ve basınçlar sahasında hemen hemen sabit kaldığı (yaklaşık 0,19) ve
sürtünme katsayısı üzerinde sıcaklık artışının hız artışına göre daha etkili
olduğu bulunmuştur. Ayrıca sabit bir pv değeri için belirli bir sıcaklığa kadar
"küçük hız + büyük basınç" kombinasyonunun daha düşük sürtünme
katsayıları sağladığı bulunmuştur.
PTFE is widely used
as a dry-bearing material since it does not subject to the stick-slip motion
along the wide temperature range, and has a low coefficient of friction. In
this study, the coefficient of friction between the bearing sleeve made of
graphite and bronze filled PTFE compound and the steel journal is determined on
a test rig and then its dependence upon the velocity and temperature increase
is investigated. As a result of the tests, it was found that the coefficient of
friction was almost constant (about 0.19) in the relatively small velocity and
pressure area and the temperature increase over the coefficient of friction was
more effective than the increase in velocity. It has also been found that the
combination of "small velocity + large pressure" up to a certain
temperature for a constant pv value provides lower friction coefficients.
Primary Language | Turkish |
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Subjects | Engineering |
Journal Section | Research Articles |
Authors | |
Publication Date | December 31, 2018 |
Submission Date | May 2, 2018 |
Acceptance Date | December 5, 2018 |
Published in Issue | Year 2018 Volume: 23 Issue: 3 |
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