The invention discloses a braking torque detecting method and system of a crane brake. The braking torque detecting method comprises the following steps: S101, determining that a brake to be tested is in a braking state, and meanwhile, turning on another brake on a transmission chain to ensure that the another brake is in a non-braking state; S102, setting testing torque; S103, setting a current limit value output by a frequency converter; S104, setting a testing speed of a motor, wherein the testing speed is 3-8 percent of a rated speed of the motor; S105, sending a starting instruction to the frequency converter from a main controller, and starting a torque testing process, wherein the frequency converter tries to drive the motor to rotate to reach a set testing speed, and the frequency converter increases the output current, so that the torque at the output end of the motor is increased gradually; and S106, judging and processing. The braking torque detecting method has the advantage that a user automatically, simply and rapidly detects the crane brake in a case in which an original crane electrical control system is not required to be reconstructed, and provides a guarantee for safety running of a crane.


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    Title :

    Braking torque detecting method and system of crane brake


    Contributors:
    GU XIAO (author) / LI RUIHUA (author) / SUN BIN (author)

    Publication date :

    2015-07-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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