Test bench and method for testing the drive train of a wind turbine
The invention relates to a test bench ( 1 ) for testing a drive train of a wind turbine, comprising a drive device ( 40 ) for introducing test power into the drive train, which can be detachably connected to a drive train to be tested. The invention further relates to a method for testing a drive train of a wind turbine by way of a test bench ( 1 ), and to a drive train of a wind turbine. The test bench ( 1 ) according to the invention is characterized in that the drive device ( 40 ) for testing a drive train is or will be fitted and mounted on or to the drive train so as to be removable, wherein most of the weight of the drive device ( 40 ) is borne by the drive train when the drive device ( 40 ) is fitted or mounted.
1. A test bench for testing a drive train of a wind turbine, comprising a drive device for introducing test power into the drive train, wherein the drive device is configured to be detachably connected to the drive train to be tested, wherein for testing the drive train the drive device is mounted on or attached to and supported on the drive train so as to be removable, and wherein most of a weight force of the drive device is borne by the drive train when the drive device is mounted on or attached to and supported on the drive train.
2. The test bench according to claim 1 , wherein the drive device in a removed state is freely movable.
3. The test bench according to claim 1 , wherein when the drive device is mounted on or attached to and supported on the drive train the weight force of the drive device borne by the drive train corresponds to a weight force of a rotor of the wind turbine.
4. The test bench according to claim 1 , wherein a bearing of the drive device on the drive train is a floating bearing.
5. The test bench according to claim 1 , wherein the drive device has a gear configured for placement on a drive flange, and one or more pinions, which engage on or in a circumference of the gear in an external toothing or internal toothing of the gear.
6. The test bench according to claim 1 , wherein the drive device has one or more hydraulic or electric drive motors.
7. The test bench according to claim 6 , wherein the drive motors each act on a pinion, wherein the drive motors are synchronized by a hydraulic ring line or using an electronic control.
8. The test bench according to claim 1 , wherein the drive device comprises a torque support, which has two support feet supported on the ground.
9. The test bench according to claim 8 , wherein the torque support has a forced load compensation comprising crossfeed-hydraulic or piezo elements.
10. The test bench according to claim 1 , wherein the drive device has a retaining apparatus on which the drive device is suspended, wherein the retaining apparatus has a plurality of retaining openings or an elongated hole having latching positions for a lifting tool by means of which an axis inclination of the drive device can be adjusted when the drive device is suspended.
11. A method for testing a drive train of a wind turbine with a test bench according to claim 1 , comprising detachably mounting or attaching a drive device of the test bench on or to the drive train such that most of a weight of the drive device is borne by the drive train.
12. The method according to claim 11 , wherein when the drive device is mounted on or attached to the drive train the weight of the drive device borne by the drive train corresponds to a weight of a rotor of the wind turbine.
13. The method according to claim 11 , wherein testing with the drive device occurs on a plurality of drive trains, and wherein in each case the drive device is moved from a tested drive train to a drive train to be tested.
14. A drive train of a wind turbine that has been tested using a method according to claim 11 .