Arrangement for detecting bearing failures in elevator
AssigneeKone Corporation
InventorsAntti Saarelainen, Henri Wenlin, Pasi Lehtimäki, Janne Rossi
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Abstract
An arrangement for detecting bearing failures in an elevator system, which elevator system includes a hoisting machinery with a traction sheave on a rotary shaft, an elevator car, a counterweight and a hoisting element connected between the car and the counterweight and arranged to be moved by the a rotation of the traction sheave, and which arrangement includes at least a motion sensor for measuring rotation of the hoisting motor. The arrangement includes a signal processing unit connected to the motion sensor and arranged to process vibration signals originated in the bearings of the elevator system.
Claims15
An arrangement for detecting bearing failures in an elevator system, the elevator system comprising at least an elevator control unit, a hoisting machinery with a hoisting motor, a traction sheave on a rotary shaft, an elevator car, a counterweight and a hoisting element connected between the car and the counterweight and arranged to be moved by the a rotation of the traction sheave, said arrangement comprising:
- at least a motion sensor for detecting rotation of the hoisting motor;
- and
- a signal processing unit connected to the motion sensor and arranged to process vibration signals originated in bearings of the elevator system,
- the signal processing unit is configured to perform Fourier transforms on the vibration signals detected by the motion sensor, and
- wherein the motion sensor is arranged to receive vibration signals originated in bearings of diverter pulleys of the elevator car and/or in bearings of diverter pulleys of the counterweight through moving hoisting element.
An arrangement for detecting bearing failures in an elevator system, the elevator system comprising at least an elevator control unit, a hoisting machinery with a hoisting motor, a traction sheave on a rotary shaft, an elevator car, a counterweight and a hoisting element connected between the car and the counterweight and arranged to be moved by the a rotation of the traction sheave, said arrangement comprising:
- at least a motion sensor for detecting rotation of the hoisting motor;
- and
- a signal processing unit connected to the motion sensor,
- wherein the motion sensor and the signal processing unit are locally placed in the hoisting machinery and are arranged to identify and process vibration signals originated in bearings of the elevator system,
- the signal processing unit is configured to perform Fourier transforms on the vibration signals detected by the motion sensor, and
- wherein the motion sensor is arranged to receive vibration signals originated in bearings of diverter pulleys of the elevator car and/or in bearings of diverter pulleys of the counterweight through moving hoisting element.
Dependencies are inferred from the claim text.