Process and apparatus device for analysis of roller bearings in machines
First Claim
1. A process for analyzing roller bearings having a plurality of roller elements which contact an inner ring and an outer ring of the roller bearings, said process comprising the steps of:
- recording a signal produced by the rolling motion of said roller bearings using a sensor;
evaluating the amplitude of the signal in order to determine at least one of a presence of damage and damage depth to a respective running surface of said inner ring and said outer ring, said damage resulting in a depression into said running surface, wherein said evaluating is performed using a dynamic model of the roller bearing, and wherein at least one of several double-sided contact stiffnesses of the rolling elements are taken into account in order to determine a transfer function based on the relation of a force caused by the present damage and a related output signal of the sensor, the sensor signal being taken into account in the evaluation of the signal amplitude.
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Abstract
The invention relates to a process for analysis of roller bearings (15) which have been installed in machines, by means of a sensor (10) a signal being recorded which is produced by the rolling motion, and the signal amplitude is evaluated in order to determine the presence and optionally the depth of the damage in the roller bearing running surface (56). In doing so a dynamic model of the roller bearing in the machine is considered, in which at least the bilateral contact stiffnesses (4, 6) of the rolling elements are considered in order to determine the transfer function between the force caused by the damage and the corresponding sensor signal which is then taken into account in the signal amplitude evaluation. The invention furthermore relates to a corresponding analysis device.
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Citations
33 Claims
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1. A process for analyzing roller bearings having a plurality of roller elements which contact an inner ring and an outer ring of the roller bearings, said process comprising the steps of:
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recording a signal produced by the rolling motion of said roller bearings using a sensor;
evaluating the amplitude of the signal in order to determine at least one of a presence of damage and damage depth to a respective running surface of said inner ring and said outer ring, said damage resulting in a depression into said running surface, wherein said evaluating is performed using a dynamic model of the roller bearing, and wherein at least one of several double-sided contact stiffnesses of the rolling elements are taken into account in order to determine a transfer function based on the relation of a force caused by the present damage and a related output signal of the sensor, the sensor signal being taken into account in the evaluation of the signal amplitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A apparatus for analyzing a roller bearing which has been installed in a machine, said apparatus comprising:
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a sensor for acquiring a signal produced by the movement of rolling elements of said roller bearings;
a signal processing device for processing the signal which has been picked up by said sensor;
a signal evaluation device for evaluating an amplitude of the processed signal in order to determine at least one of a presence of damage and a depth of damage to a running surface of said roller bearing, wherein said signal processing device has means for processing a signal using a dynamic model of the roller bearing, said dynamic model taking into account at least one of several double-sided contact stiffnesses of the rolling elements in order to determine a transfer function based on the relation of a force caused by the present damage and a related output signal of the sensor, the sensor signal being taken into account in the evaluation of the signal amplitude.
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Specification