Abstract: A rotor bearing unit for testing a drive component is described. The rotor bearing unit has a shaft part, a guide box, and a housing part. The shaft part is rotatably arranged relative to the housing part, the housing part is frictionally connected to the guide box, the housing part of the rotor bearing unit is designed to connect to a housing of the drive component to be tested in a force-fitting and/or form-fitting manner, and the shaft part of the rotor bearing unit is designed to connect to a shaft of the drive component to be tested in a force-fitting and/or form-fitting manner. Additionally, a test structure including such a rotor bearing unit is described.

Abstract: A test bench for testing a planetary transmission is provided. In order to utilize the test bench for a planetary transmission without a planetary carrier bearing, the test bench has a central bearing unit. The central bearing unit is configured to rotatably mount a planetary carrier of a first stage of the planetary transmission, and the central bearing unit is configured, furthermore, to center an internal gear of the planetary transmission with respect to the planetary carrier.

Abstract: A component arrangement for a wind turbine including an outer component, an inner component arranged within the outer component, and a rolling bearing pair, which has a first rolling bearing and a second rolling bearing arranged in a manner adjusted relative to one another and which is preloaded by means of a clamping force. The inner component and the outer component are mounted so as to be rotatable relative to one another about an axis of rotation by means of the rolling bearing pair. The component arrangement also includes a pressure sensor for determining a preload of the rolling bearing pair, which is arranged in a flow of the clamping force. A method for assembling a component arrangement, a wind turbine having a component arrangement, and a method for operating a wind turbine is also disclosed.