Condition monitoring for plain bearings by means of structure-borne noise
AssigneeZF Friedrichshafen AG
InventorsAndreas Vath, Sebastian Schmidt
Life of this patent
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Abstract
A method for determining an operating condition of at least one plain bearing includes measuring, by a sensor, structure-borne noise arising from a toothed engagement of a first gear and a second gear, wherein the first gear is rotatably mounted via the plain bearing and meshes with the second gear. The method further includes assigning, to a signal of the sensor, a variable that correlates with the operating condition of the plain bearing.
Claims13
A method for determining an operating condition of at least one plain bearing, the method comprising:
- measuring, by a sensor, structure-borne noise arising from a toothed engagement of a first gear and a second gear, wherein the first gear is rotatably mounted via the plain bearing and meshes with the second gear;
- assigning, to a signal of the sensor, a variable that correlates with an absolute or relative bearing play of the plain bearing;
- and
- filtering the signal, wherein the filtered signal corresponds to a signal of the structure-borne noise arising from the toothed engagement,
- wherein a simulated structure-borne noise from the toothed engagement of the first gear and the second gear, a simulated signal of the sensor, and a simulated filtered signal are determined by simulation using a model of the first gear, the second gear, and the plain bearing, and
- wherein the model images the operating condition of the plain bearing correlating with the absolute or relative bearing play.
An arrangement, comprising:
- at least one plain bearing;
- a first gear mounted via the plain bearing;
- a second gear with which the first gear meshes;
- a sensor configured to measure structure-borne noise from a toothed engagement of the first gear and the second gear;
- and
- a controller configured to assign, to a signal of the sensor, a variable that correlates with an absolute or relative bearing play of the plain bearing,
- wherein the controller is further configured to filter the signal, wherein the filtered signal corresponds to a signal of the structure-borne noise arising from the toothed engagement, and
- wherein the controller is configured to simulate structure-borne noise from the toothed engagement of the first gear and the second gear, signals of the sensor, and filtered signals using a model of the first gear, the second gear, and the plain bearing, and
- wherein the model images the operating condition of the plain bearing correlating with the absolute or relative bearing play.
A method for determining a bearing gap of at least one plain bearing, the method comprising:
- measuring, by a sensor, structure-borne noise arising from a toothed engagement of a first gear and a second gear, wherein the first gear is rotatably mounted via the plain bearing and meshes with the second gear;
- assigning, to a signal of the sensor, a variable that correlates with the bearing gap of the plain bearing;
- and
- filtering the signal, wherein the filtered signal corresponds to a signal of the structure-borne noise arising from the toothed engagement,
- wherein a simulated structure-borne noise from the toothed engagement of the first gear and the second gear, a simulated signal of the sensor, and a simulated filtered signal are determined by simulation using a model of the first gear, the second gear, and the plain bearing, and
- wherein the model images an operating condition of the plain bearing correlating with the bearing gap.
Dependencies are inferred from the claim text.