Abstract: The
high failure rate of crane brake results from improper choice of
braking torque. The mathematical model of reliability for the
crane brake parameters is introduced. Based on large amount of
actual data the parameter reliabilities of 5~50 t general
overhead travelling cranes are calculated, the
probabilities that the braking torque is less than the static
torque acting on the axle when the load moves down are obtained.
Moreover, the
ways to improve the reliability of brake parameters are
discussed, the
most reasonable values of braking safety coefficient are given.
Key words: Cranes
Brakes Braking torque Parameter reliability
*
This
project is supported by Provincial Natural Science Foundation of Shanxi
(No.20011051). Received December 24, 2001; received in revised form
March 30, 2002; accepted April 22, 2002
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