Abstract
Safety friction couplings have been applied in mining, industry, construction, agriculture, transportation, and public utilities. They are used in free shafts uncoupling in critical situations when the value of torque exceeds the permissible value under short-term overloads. Compared to other safety couplings such as destructive element couplings (with shear pins), gear clutches (cam, ball), friction couplings transmit much larger torques being relatively small in dimensions. They have a small locking force, and better smooth running characteristics. The advantage of using multidisk couplings is the possibility of increasing the value for the limit torque by increasing the number of disks (due to the increased area of adjacent surfaces). Operation of safety friction multidisk couplings is influenced by various factors, an understudied relationship between the response speed of a friction coupling and the rate of the applied load rise being among them. The paper presents experimental data on a safety friction multidisk coupling operation on the test stand, and that allows one to fill out this gap.
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