The invention relates to a method for monitoring brakes of a multi-brake hoisting machinery (2), the method comprising performing a test sequence (100), wherein the test sequence comprises: holding (101) at least one brake unit (5) in the open position while holding the rest of the brake units (5) in the closed position; and ramping (102;102') up a test torque with the motor (3), or alternatively ramping (102') down a test torque with the motor (3); and monitoring (103) movement of a component of the hoisting machine during the ramping up or down (102;102'), respectively, said component preferably being the rotor of the motor (3) or the drive member (4); and detecting (104) starting of movement of the component or that amount of movement exceeds a limit amount during the ramping up or down (102;102'), respectively; and registering (105) the magnitude of the test torque (Ttest) at the moment when the movement started or exceeded a limit amount. The method comprises repeating (200) the performing (100) a test sequence one or more times with a new test configuration, the combinations of brake units (5) held in open position and in closed position being different in the test sequences; and determining (300) an individual braking torque (Ti) of each individual brake unit (5) based on the registered magnitudes of test torques (Ttest), and determining (400) and/or predicting condition of the brake units (5) based on said individual braking torques. The invention also relates to an elevator arrangement (1) implementing the method.
METHOD FOR MONITORING ELEVATOR BRAKES AND ELEVATOR ARRANGEMENT
AUFZUGSBREMSENÜBERWACHUNGSVERFAHREN UND AUFZUGSANORDNUNG
PROCÉDÉ DE SURVEILLANCE DES FREINS D'ASCENSEUR ET AGENCEMENT D'ASCENSEUR
2024-10-02
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |
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