Rolling element having sensor for use in rolling-element bearing

Abstract

The invention proposes a rolling element (1) for use in a rolling-element bearing (100), comprising an outer shell (2) and a bore (3), the bore (3) being preferably provided along a centre axis of the rolling element (1), the rolling element (1) comprising at least one sensor (5) for load measurement, which is arranged in the bore (3), and a transfer module for transferring the data measured by the sensor (5), the rolling element having an energy source, the energy source being provided for providing the energy required for the operation of the sensor (5) and / or of the transfer module, characterised in that the sensor (5) is a sensor that performs inductive measurement. The invention further proposes a rolling-element bearing and a method for load measurement.

Description

Background technique [0001] On large rolling bearings, which are used, for example, in wind power plants, enormous forces act during operation. Therefore, it is desirable to be able to perform load measurement of rolling bearings. [0002] For this purpose, it is known, for example, from EP 0 637 734 B1 to measure the deformation of the rolling bodies by means of strain gauges arranged in the bores of the rolling bodies, wherein the forces acting on the rolling bearing can be deduced from the deformation of the rolling bodies, That is load. However, strain gauge strips and their corresponding fixtures, usually adhesive, are very prone to wear and aging, not least because they are often in contact with grease and / or other lubricants in rolling bearings and must be replaced regularly. Therefore, such a load measurement is only possible under laboratory conditions or for a short limited time, or is possible for a limited time. [0003] It is known from EP 1 849 013 B1 to arran...

AI Technical Summary

Problems solved by technology

Finally, capacitive load measurements are less accurate and have very limited resolution

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