Abstract
Friction characteristics of braking material for safety gear of ultra-high speed elevator (1000m/min) was investigated by l/30 scale testing apparatus. The devaroped braking material is made of a compound with ceramics and metallic materials to prevent deterioration by shock and frictional heat. Its coefficient of friction is approximately 20% higher than the convenntional braking material, and its wear resistance is excellent. To clarify the friction characteristics of that for duplex type safty gear, breaking tests on the slided suraface of the rail specimen were also carried out. On the slided surface of the rail supecimen, friction coefficient is lower than that on the vergin surface. Its decreaseing rate of the devaloped breaking material is less than that of conventional one. The deveroped breaking material is better suited for duplex type saety gear.
