The general idea of a vapor lubrication system applied in smallpower motors

摘要

Sliding contacts are widely used in motors of various types andapplications. Recently motors have become more and more downsized, whilelonger life and higher reliability are demanded. In such a background,many difficult problems remain to be solved. One of the most difficultproblems is the behavior of the sliding contacts used in brushes andcommutators. This study is intended to achieve satisfactorycharacteristics and long life of metal brushes and commutators. This isa report on the general idea of solving the problem by using a vaporlubricant. Polyhydric alcohols were used as vapor lubricants, andvarious types of small power motors tested. As a result, the surfaces ofthe brushes and commutators were found to be free of carbonaceousdeposits, such as black powder and brown powder. Motors lubricated withvapor lubricants of this system have already been manufactured and usedin quantity