Wear-monitoring of a gearbox in a power station
First Claim
1. A gearbox monitoring device for a power station gearbox, the gearbox monitoring device comprising:
- a first angular shaft encoder for a first-shaft of the power station gearbox, which angular shaft encoder is configured to sense a first angular position signal,at least a second angular shaft encoder for at least a second-shaft of the power station gearbox, which angular shaft encoder is configured to sense at least a second angular position signal,at least one displacement sensor for sensing displacements of a shaft of the gearbox in at least one translational degree of freedom, anda calculation unit configured to monitor a wear-condition of the gearbox according to the angular position signals of the angular shaft encoders and at least one translational displacement signal from the at least one displacement sensor, and provide a condition-signal representative of the wear-condition of the gearbox,wherein;
the first and/or second shaft has a further angular shaft encoder and a twist of the shaft is determined by the calculation unit according to the difference in relative angular positions of the angular shaft encoders; and
a torque load signal is generated by the calculation unit according to the twist and the shaft'"'"'s stiffness.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a method of monitoring a wear of a gearbox in a power station, such as a windmill, water-wheel or tidal power station, the gearbox comprising at least two shafts, cogwheels and bearings as components of the gearbox. The method comprises sensing an angular position at the shafts by a rotational shaft encoder and monitoring the wear of the transmission-unit according to differences of the sensed angular positions and generating a condition signal representative of the wear of the gearbox according to the monitored differences. The monitoring comprises an additional sensing of at least one additional degree of freedom, in particular an axial and/or eccentric displacement, of at least one of the shafts caused by wear of at least one of the components of the gearbox, and generating the condition signal according to the displacement and differences in the at least two degrees of freedom.
-
Citations
32 Claims
-
1. A gearbox monitoring device for a power station gearbox, the gearbox monitoring device comprising:
-
a first angular shaft encoder for a first-shaft of the power station gearbox, which angular shaft encoder is configured to sense a first angular position signal, at least a second angular shaft encoder for at least a second-shaft of the power station gearbox, which angular shaft encoder is configured to sense at least a second angular position signal, at least one displacement sensor for sensing displacements of a shaft of the gearbox in at least one translational degree of freedom, and a calculation unit configured to monitor a wear-condition of the gearbox according to the angular position signals of the angular shaft encoders and at least one translational displacement signal from the at least one displacement sensor, and provide a condition-signal representative of the wear-condition of the gearbox, wherein; the first and/or second shaft has a further angular shaft encoder and a twist of the shaft is determined by the calculation unit according to the difference in relative angular positions of the angular shaft encoders; and a torque load signal is generated by the calculation unit according to the twist and the shaft'"'"'s stiffness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A wear monitored gearbox system comprising:
-
a power station gearbox comprising a first shaft and a second shaft; a gearbox monitoring device for the power station gearbox, the gearbox monitoring device comprising; a first angular shaft encoder for the first-shaft of the power station gearbox, which angular shaft encoder is configured to sense a first angular position signal, at least a second angular shaft encoder for the at least a second-shaft of the power station gearbox, which angular shaft encoder is configured to sense at least a second angular position signal, at least one displacement sensor for sensing displacements of a shaft of the gearbox in at least one translational degree of freedom, and a calculation unit configured to monitor a wear-condition of the gearbox according to the angular position signals of the angular shaft encoders and at least one translational displacement signal from the at least one displacement sensor, and provide a condition-signal representative of the wear-condition of the gearbox, wherein; the first and/or second shaft has a further angular shaft encoder and a twist of the shaft is determined by the calculation unit according to the difference in relative angular positions of the angular shaft encoders; and a torque load signal is generated by the calculation unit according to the twist and the shaft'"'"'s stiffness.
-
-
12. A method of monitoring wear of a power station gearbox in a power station, the power station gearbox comprising at least the following components:
-
at least a first shaft; at least a second shaft; cogwheels; and bearings, the method comprising; providing a gearbox monitoring device for the power station gearbox; the gearbox monitoring device comprising; a first angular shaft encoder for the first-shaft of the power station gearbox, which angular shaft encoder is configured to sense a first angular position signal, at least a second angular shaft encoder for the a second-shaft of the power station gearbox, which angular shaft encoder is configured to sense at least a second angular position signal, at least one displacement sensor for sensing displacements of a shaft of the power station gearbox in at least one translational degree of freedom, and a calculation unit configured to monitor a wear-condition of the power station gearbox according to the angular position signals of the angular shaft encoders and at least one translational displacement signal from the at least one displacement sensor, and provide a condition-signal representative of the wear-condition of the power station gearbox; sensing the first angular position, of the first shaft by the first rotational shaft encoder; sensing the second angular position, of the second shaft by the second rotational shaft encoder; monitoring the wear of the power station gearbox according to differences of the sensed angular positions of the first shaft and second shaft; and generating a condition-signal representative of the wear of the power station gearbox according to the monitored differences, comprising; an additional sensing of a displacement of the first shaft and/or the second shaft in at least one additional degree of freedom;
whereinthe displacement in the additional degree of freedom is comprised in the monitoring and generation of the condition-signal as an indication of wear. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A gearbox monitoring device for a power station gearbox, the gearbox monitoring device comprising:
-
a first angular shaft encoder for a first-shaft of the power station gearbox, which angular shaft encoder is configured to sense a first angular position signal, at least a second angular shaft encoder for at least a second-shaft of the power station gearbox, which angular shaft encoder is configured to sense at least a second angular position signal, at least one displacement sensor for sensing displacements of a shaft of the gearbox in at least one translational degree of freedom, and a calculation unit configured to monitor a wear-condition of the gearbox according to the angular position signals of the angular shaft encoders and at least one translational displacement signal from the at least one displacement sensor, and provide a condition-signal representative of the wear-condition of the gearbox, wherein an intermediate-stage-shaft of the gearbox is equipped with a sensor.
-
Specification