Overload protection for a transmission test stand

Abstract

This invention relates to a rotor bearing unit (1) for testing a transmission component (2). To improve the assembly for testing the transmission component (2), the invention proposes a rotor bearing unit (1) having a shaft portion (11), a guide box (12), and a housing portion (13). The shaft portion (11) is rotatably arranged relative to the housing portion (13), wherein the housing portion (13) is frictionally connected to the guide box (12), the housing portion (13) of the rotor bearing unit (1) is designed to be force-fitted and / or form-fitted connected to the housing (21) of the transmission component (2) under test, and the shaft portion (11) of the rotor bearing unit (1) is designed to be force-fitted and / or form-fitted connected to the shaft (22) of the transmission component (2) under test. The invention also relates to a testing apparatus (3) comprising such a rotor bearing unit (1). The test apparatus (3) also includes the transmission component (2) to be tested, particularly a transmission or planetary transmission, the housing portion (13) of the rotor bearing unit (1) is connected to the housing (21) of the transmission component (2) to be tested in a force-fit and / or form-fit manner, and the shaft portion (11) of the rotor bearing unit (1) is connected to the shaft (22) of the transmission component (2) to be tested in a force-fit and / or form-fit manner.

Description

Technical Field

[0001] This invention relates to a rotor bearing unit for testing transmission components. The invention also relates to a testing apparatus having this type of rotor bearing unit, wherein the testing apparatus further includes the transmission component to be tested. Furthermore, the invention relates to the use of this type of rotor bearing unit and / or this type of testing apparatus. Background Technology

[0002] Today, transmission components (such as drivetrains, drivetrain / generator combinations, or generators) are tested as one or more modules within an integrated system. This is particularly true for transmission components in wind turbines, where their performance and structure are tested as modules. In this type of system, the drivetrain is often positioned between the rotor bearings of the generator and the drivetrain. The transmission components are connected to adjacent shafts here by force-fit and / or form-fit. The drivetrain is often designed as a planetary transmission. Within the scope of development testing or a series of acceptance tests, the system is tested at rotational speeds and often at torques in the torque loop.

[0003] In the event of a malfunction, a sudden deceleration of the shaft may be required. The force required for this purpose is absorbed by the rotor bearing unit and introduced into the base of the rotor bearing unit or testing device. The forces and moments generated in this process must be able to be withstood by the load-bearing structure intersecting the base, and must also be absorbed by the base without damage. Therefore, corresponding components must be configured for the mechanical loading; otherwise, components may break under the load, and the kinetic energy stored in the system will become uncontrollably free, such as debris flying everywhere. From a safety perspective, this situation is extremely worrying.

[0004] To manage risk, safety clutches or slipper clutches are now used to, for example, protect the transmission and generator modules from affecting each other and to separate them in the event of a failure. As known from DE 10 2007 032 412A1, in the case of this type of wind turbine, an axially displaceable measuring body is used to indicate the degree of slippage of the slipper clutch in order to identify the need for maintenance.

[0005] As known from CN 110 823 566A, a friction clutch for use in motor vehicles is driven at high rotational speed by a driver via a speed-increasing transmission through a friction clutch enclosed in a fixed housing, wherein the speed-increasing transmission acts on the axial side of the friction clutch and an accompanying rotating shaft axially presses against the other axial side of the friction clutch.

[0006] In the following text, the testing and inspection of components will not be distinguished. Summary of the Invention

[0007] The purpose of this invention is to improve the arrangement of test transmission components.

[0008] This objective is achieved by the rotor bearing unit, testing apparatus, and application according to the invention. Preferred configurations are specified in the dependent claims and the description below, which can present an aspect of the invention individually or in combination. If one feature is shown in combination with another feature, this is only for the purpose of simplifying the illustration of the invention and should not in any way imply that the feature cannot be an improvement of the invention in the absence of the other features.

[0009] A rotor bearing unit for testing transmission components has a shaft portion, a guide box, and a housing portion, wherein the shaft portion is rotatably arranged relative to the housing portion, and the housing portion is frictionally locked to the guide box. The housing portion of the rotor bearing unit is designed to be force-fitted and / or form-fitted to the housing of the transmission component under test, and the shaft portion of the rotor bearing unit is designed to be force-fitted and / or form-fitted to the shaft of the transmission component under test. A testing apparatus having this type of rotor bearing unit also includes a transmission component under test, particularly a transmission drive or planetary transmission, wherein the housing portion of the rotor bearing unit is force-fitted and / or form-fitted to the housing of the transmission component under test, and the shaft portion of the rotor bearing unit is force-fitted and / or form-fitted to the shaft of the transmission component under test.

[0010] This invention is particularly based on the discovery that the proposed arrangement can reduce the mechanical loading on the transmission components and the base. This invention enables the protection of the system's testing apparatus in the event of a failure, preventing excessive loads on the load-bearing structure and avoiding uncontrolled movement or damage, even when components such as the base have low load-bearing capacity.

[0011] Therefore, the rotor bearing unit essentially has a shaft portion, a guide box, and a housing portion. The shaft portion connects to and supports the shaft of the transmission component under test. An example here is the input shaft of a transmission, particularly the input shaft of a planetary transmission. The input shaft can be, for example, the planet carrier of a planetary transmission. In the case of a planetary transmission as the transmission component, the shaft can also be aligned via the rotor bearing unit. The shaft portion is rotatably connected to the housing portion, for example, via bearings. Thus, the shaft portion can rotate during testing. The housing portion and the guide box are connected to each other by friction locking. These components are fixed horizontally and vertically relative to each other here. If torque is now acting between the housing portion and the guide box, a force acts at the boundary between the housing portion and the guide box. If said force exceeds the force generated by friction locking, the housing portion can rotate relative to the guide box about its own axis. This is used in erroneous situations, for example, if a blockage occurs in the rotor bearing of a transmission or generator. By means of this blockage in the transmission component, such as the teeth of a transmission or the rotor bearing of a rotor / generator, the kinetic energy of the rotating centrifugal mass acts as an impact pulse on the load-bearing structure connected to the base.

[0012] It has been recognized that transmission components (especially planetary transmissions) are distinguished by parts that can rotate relative to each other. The transmission component under test has a shaft that can rotate relative to a fixed housing. For inspection or testing of a transmission component, the shaft of the transmission component under test must be coupled to the shaft portion of the rotor bearing unit for common rotation, while the housing should be practically immovably fixed, for example, by immovably fixing it to a fixed component and / or base of the test bench. However, since the transmission component under test is intentionally intended to be exposed to extreme operating environments, it is not impossible for a component failure to occur in the transmission component under test, which could cause the shaft of the transmission component to be non-rotatably blocked by the housing of the transmission component. Since the housing, which is actually fixed in a static manner, is not fixed to a rigid stationary body but is connected to the housing portion of the rotor bearing unit, when the shaft of the transmission component is blocked by the housing of the transmission component in the event of a component failure, the housing portion of the rotor bearing unit (which is connected to the housing) can slide across the guide box. This sliding operation prevents violent impacts and significantly reduces the maximum torque required for sudden support. Therefore, in the event of a failure, the load-bearing structure withstands a lower load and can avoid uncontrolled movement or damage.

[0013] A torque limiter can be formed between the housing portion of the rotor bearing unit and the guide box of the rotor bearing unit. This torque limiter is capable of sliding and inducing frictional locking braking when a predetermined limit torque is exceeded. The torque limiter formed here is part of the rotor bearing unit used for the test apparatus, rather than part of the transmission component under test. Therefore, torque limiting does not need to be maintained in the module under test for testing purposes, and production costs remain low. The frictional lock between the housing portion and the guide box can form a low-pass filter that limits the maximum torque to be supported to the limit torque setting. The limit torque depends on the frictional characteristics between the housing portion and the guide box, particularly the coefficient of friction and contact pressure, which are appropriately selected to set the desired maximum torque. The housing portion and the guide box are preferably in direct contact with each other. For example, a press fit is provided between the housing portion and the guide box. Specifically, the housing portion and the guide box are not fitted with friction linings; that is, they are connected to each other in a frictionally locked manner without friction linings between them. This ensures that a clearly audible noise is produced without additional assistance as the housing portion slides across the guide box, especially due to the steel / steel contact. This noise directly, intuitively, and cost-effectively signals the presence of a fault.

[0014] By means of the connection between the housing portion and the housing of the transmission component under test, for example by means of a flange, a corresponding torque is generated between the housing portion and the guide box, which has the effect of rotating the housing portion relative to the guide box. Therefore, the huge dynamic force of sudden deceleration of the rotating centrifugal mass in the transmission system of the test device can be avoided. This force must be able to be borne by the support structure together with the base and the base itself, and could potentially cause damage under overload conditions.

[0015] As the size, performance, and mass of the components used in the testing apparatus increase, the rotational energy in the system becomes so high that, combined with a fault, the surrounding structure cannot be guaranteed to decelerate suddenly in terms of strength, particularly for each stage of the rotational mass. Components subjected to overload due to such faults are at risk of fracture, and the kinetic energy stored in the system can lead to uncontrolled movement of large masses. This type of testing is conducted in production and assembly shops. This poses both safety risks to people working in the vicinity and significant material losses in the event of a fault. The proposed apparatus makes it possible to provide safety against breakage and reliably prevent uncontrolled movement of debris. Therefore, this type of testing apparatus can also be erected in production and assembly shops without further strength-enhancing measures and associated excessive size to eliminate or reduce the potential risks described above.

[0016] For example, if the generator in the system is subjected to intense testing at nominal speed, a fault in the transmission, such as due to debris wedging into the teeth, could result in a sudden high load that is necessary to keep the system in place.

[0017] With the help of the proposed rotor bearing unit, the kinetic energy stored in the system is converted into heat and rotational energy around the defined axis in the event of a fault (such as, for example, internal blockage in the transmission).

[0018] In this scenario, the transmission system under test, consisting of a planetary gear with a generator optionally coupled to it, can undergo final load and speed tests to assess its functionality and load capacity. The same tests can be performed on the transmission itself, the transmission / generator combination, or simply the generator.

[0019] The proposed arrangement creates a closed torque loop, where the housing portion is configured such that, although it is fixed in both horizontal and vertical positions within the guide box, it allows for extended rotational motion of the system in the event of a fault. During normal, undisturbed test or inspection operation, only the shaft portion rotates, while the housing portion remains stationary. For example, if a rolling fault or functional blockage occurs in the transmission, the housing portion will act as an instantaneous center of rotation, attempting to introduce forces from the stored kinetic energy into the base via the support structure. This and associated potential overload of the support structure is prevented by the proposed arrangement because the housing portion is frictionally locked to the guide box, allowing free rotation under overload conditions. In particular, the purely friction-locked connection between the housing portion and the guide box is advantageous because it allows free rotation under all operating conditions in the event of an overload.

[0020] Previous load-bearing structures were designed and sized in such a way that forces and torques generated by potential faults (such as blockages in the drive or generator rotor) could be absorbed and transferred to the base. Using the proposed test apparatus, systems with relatively large moments of inertia and / or rotational energy in terms of nominal power can also be tested on a test bench equipped with the proposed rotor bearing unit. In other words, the proposed arrangement significantly improves the performance of the test bench.

[0021] The adjustable distance and the appropriate selection of contact materials between the guide box and the housing allow for the setting of loads in a manner that prevents overloading of components in force-fitted connections. These components, in particular, include the threaded connections between the legs and the base, which would be at risk of overloading.

[0022] Compared to a slip clutch that acts as an overload clutch, a test bench or test apparatus with the proposed rotor bearing unit, used, for example, in the case of a disassembled high-speed transmission, is significantly more cost-effective, especially for integrated hybrid power systems consisting of a transmission / generator system, taking into account the safety aspects discussed.

[0023] To obtain CE marking for the testing apparatus, failures must be reliably absorbed. For this purpose, a risk / hazard assessment describes how such failure protection can be achieved. Evidence in this regard is readily available because the potential hazards caused by breakage and flying parts are reliably avoided, purely physically, through the design of the rotor bearing unit or the testing apparatus.

[0024] For the design of test benches with one or more transmission components to be tested, it has proven advantageous to design the stationary supply lines to the test object, such as lubricant supply and its return, sensor system, or power supply, in such a way that they can be easily and reliably separated from the stationary parts when rotational movement of the housing portion relative to the guide box is detected to begin.

[0025] In another advantageous embodiment of the invention, the transmission component to be tested is a drive, particularly a planetary drive. Experience has shown that the risk of drive blockage is higher than that of generator rotor blockage, especially in the testing apparatus. Therefore, the proposed rotor bearing unit, specifically for drive, particularly for planetary drives, has proven to be particularly advantageous. In the case of the drive, especially in the event of a failure, indirect damage can also be reliably prevented by the testing apparatus.

[0026] Specifically, the housing portion has a housing flange for fastening the housing of the transmission component under test to it for mutual rotation by means of an axially oriented fastening device. The housing of the transmission component under test can be mounted on the rotor bearing unit via the housing portion through a plurality of fastening points distributed circumferentially, and particularly distributed on a common radius, via the flange. Direct fastening to the base is avoided. The fastening flange can, for example, project axially in the axial direction within the guide box, and can also optionally project radially outward from the remaining housing portion, such that the housing flange can be particularly at least partially located in a radial region common to the guide box, but axially spaced from the guide box. As a result, a correspondingly high torque can be transmitted between the housing of the transmission component under test and the housing portion of the rotor bearing unit with limited space requirements. The axially oriented fastening device can be a threaded piece secured with a nut. Alternatively, the housing flange on the axial surface side of the housing portion can be formed entirely radially inside the guide box. To form the housing flange, the housing portion can have, for example, an axially extending channel opening.

[0027] Preferably, the housing portion has an axially oriented blind hole with internal threads for screwing onto the housing of the transmission component to be tested. Thus, the housing of the transmission component to be tested can be easily screwed onto the axial side of the housing portion.

[0028] Particularly preferably, the housing portion is configured to be substantially mirror-reversed. Therefore, the housing flange and / or axially oriented blind hole with internal threads can also be provided on the other axial side. Thus, the corresponding transmission components on both axial sides of the rotor bearing unit can be inspected or tested.

[0029] In another advantageous embodiment of the invention, the guide box has a first portion and a second portion, wherein the frictional locking level of the friction-locking connection can be adjusted by a predetermined distance between the first and second portions of the guide box and / or by a tribological contact configuration between the housing portion and the guide box. The level of frictional locking can be set by the distance and the tribological contact configuration. For example, the distance can be designed to be adjusted via a threaded connection. The materials and surface coatings are selected here in such a way that they have low adhesion / fretting tilt and good emergency operating performance. With this adjustment option, the test device can be adapted to the performance or physical characteristics of the component, such as nominal power or moment of inertia. Similarly, field conditions, such as the dimensions of the base or load-bearing or support structure, can be taken into account to avoid critical safety conditions, such as, for example, component breakage.

[0030] Specifically, the first and / or second portions have wear-resistant sliding surfaces facing the housing portion, wherein the wear-resistant sliding surfaces are formed, in particular, of PVD hard material layers and / or DLC layers. The upper and / or lower portions of the guide box can be formed by a single or multiple geometrically defined sliders with corresponding sliding surfaces of known rigidity. Thus, by combining the adjustable distance between the first and second portions and the coefficient of friction known from the tribological contact configuration, a defined holding torque can be set. The tribological contact configuration on the first and / or second portions can be designed such that there is minimal adhesion tilt between the materials in contact with each other, i.e., no fretting, while simultaneously possessing high wear resistance and surface pressure stability. This can be achieved using wear-resistant and high-strength physical vapor deposition (PVD) hard material layers (especially diamond-like carbon (DLC) layers).

[0031] In another advantageous embodiment of the invention, the transmission component or actuator to be tested is provided for use in a wind turbine. The arrangement of the test bench and test apparatus is specifically adapted to test one or more transmission components in a wind turbine, such as, for example, generators or actuators, particularly planetary drives. These transmission components are manufactured in relatively large quantities, and due to the difficult-to-access arrangement of the transmission components on the wind turbine tower or in the nacelle, the reliability requirements are particularly stringent. Furthermore, testing requires numerous certification requirements under specified boundary conditions. These boundary conditions can be set at the test bench or test apparatus, thus making the test bench or test apparatus particularly suitable and advantageous for measurement and testing at planetary drives in wind power applications.

[0032] In another advantageous embodiment of the invention, the nominal power of the transmission component under test is greater than 3MW. In the case of larger systems with a nominal power greater than 3MW, the rotational energy during test operation is at such a high level that a particularly large expenditure must be incurred to absorb these failures through the necessary load-bearing structure and introduce them into the base. The use of the proposed test bench or the proposed test apparatus means that components of the test apparatus, such as rotor bearing units, no longer need to be sized for this failure event and can be implemented in a lighter and more cost-effective manner.

[0033] In another advantageous embodiment of the invention, the testing apparatus is arranged back-to-back. This arrangement allows for the simultaneous testing of at least two transmission components, such as, for example, actuators, particularly two planetary actuators. In the case of the back-to-back arrangement, the test bench or testing apparatus is formed symmetrically with respect to a centrally located rotor bearing unit. In this case, the rotor bearing unit can also be formed symmetrically. One or more corresponding transmission components are arranged on either side of the rotor bearing unit. For the back-to-back arrangement, it is advantageous to also provide two electric machines, with the transmission component (such as an actuator or planetary actuator) and the rotor bearing unit arranged between them, particularly symmetrically. With this arrangement, the rotational energy that must be dissipated by the rotor bearing unit for the at least two transmission components to be tested and connected to each other via corresponding shafts is also increased. Through the proposed structure of the rotor bearing unit and testing apparatus, the considered safety aspects can be reliably managed even with these significantly increased rotational energies.

[0034] An example of a back-to-back arrangement is a transmission torque test in a system, where two systems are supported back-to-back and used as, for example, a "line end" series of tests.

[0035] In another advantageous embodiment of the invention, the transmission component to be tested is coupled to an electric motor. The electric motor allows torque to be transmitted to the transmission component under test, and thus, for example, the transmission operates at the desired operating point. In this way, the test or inspection point can be accessed and handled in a simple manner. Furthermore, the shaft of the electric motor is also protected from obstruction and related damage by the design of the rotor bearing unit. For example, arranging two electric motors in a back-to-back design is particularly advantageous. The torque and rotational speed can then be fed independently to a single transmission or multiple transmissions.

[0036] The electric motor can be mounted on the base of the test bench. In other words, the electric motor stands on the base and its weight is introduced there, at least when it is stationary. Alternatively, the electric motor can also be mounted on a rotor bearing unit via a housing or, as designed, a housing via other transmission components, and its weight is introduced into the base via the rotor bearing unit when stationary.

[0037] One aspect of the invention relates to the use of a rotor bearing unit, which can be designed and improved as described above, and / or a test apparatus, which can be designed and improved as described above, for testing planetary drives of wind turbines. Specifically, the ring gear of the planetary drive serves as the housing, and the sun shaft and / or planet carrier shaft of the planetary drive serves as the shaft. The planetary drive designed for wind turbines is a transmission component that is connected to the rotor bearing unit of the test apparatus as described above. Attached Figure Description

[0038] The present invention will now be described and explained in more detail with reference to exemplary embodiments shown in the accompanying drawings, wherein:

[0039] Figure 1 and Figure 2 Different views of the rotor bearing unit are shown, and

[0040] Figure 3 The test setup is shown. Detailed Implementation

[0041] Figure 1 Rotor bearing unit 1 is shown. Rotor bearing unit 1 stands on base 5 and has shaft portion 11, guide box 12 and housing portion 13. Shaft portion 11 is rotatably arranged relative to housing portion 13, and in particular, is rotatably mounted. Housing portion 13 is connected to guide box 12 by friction locking, so there is a friction locking connection 30 at the boundary between housing portion 13 and guide box 12. Figure 2 Another view of rotor bearing unit 1 is shown. To avoid repetition, refer to the section on... Figure 1The description and reference numerals introduced therein are as follows. Here, the guide box 12 can be divided into a first part 121 and a second part 122. By means of an adjustable and predetermined distance d between the first part 121 and the second part 122, the friction locking level of the friction locking connection 30 between the housing part 13 and the guide box 12 formed by the first part 121 and the second part 122 can be set. Another possibility for changing the friction locking level of the friction locking connection 30 lies in the tribological construction of the friction locking connection 30 between the guide box 12 and the housing part 13.

[0042] Figure 3 Test apparatus 3 with rotor bearing unit 1 is shown. To avoid repetition, refer to [the relevant documentation / reference]. Figure 1 and 2 The description and the reference numerals introduced therein are as follows. In this exemplary embodiment, the transmission component 2 to be tested is a transmission, here a planetary transmission. The transmission component 2 to be tested is connected to an electric motor 4, through which test or inspection conditions in the form of torque and speed are fed to the transmission component 2 to be tested. The other side of the planetary transmission, i.e., the other side of the transmission component 2 to be tested, is connected to a rotor bearing unit 1, such that the shaft 22 of the transmission 2 is rotatably mounted, for example, through the rotor bearing unit 1 or through bearings in the transmission. The housing 21 of the transmission component 2 to be tested is connected to the rotor bearing unit 1, for example by means of a flange, and through this connection, the housing 21 also ensures that torque is fed back to the base 5 during dynamic operation.

[0043] Force is generated between shaft 22 and housing 21 of the transmission only in the event of a failure, such as shaft 22 wedging into the transmission. Force is also applied to friction-locking connection 30, i.e., between housing 13 and guide box 12, due to the force-fit and / or form-fit connection between shaft portion 11 of rotor bearing unit 1 and shaft 22 of transmission component 2 under test, and between housing portion 13 of rotor bearing unit 1 and housing 21 of transmission component 2 under test. If this force exceeds the value that friction-locking connection 30 can absorb, housing portion 13 can move relative to guide box 12, i.e., can rotate with shaft portion 11. Therefore, the force transmitted to base 5 through the load-bearing or support structure is limited. The advantage of housing portion 13 rotation is that the force acting due to a failure between shaft 22 and housing 21 no longer needs to be introduced (at least no longer fully introduced) into base 5 via rotor bearing unit 1. This reduces the requirements regarding the strength of rotor bearing unit 1 and the construction of base 5.

[0044] The illustrated design corresponds to a back-to-back arrangement where two transmission components 2 to be tested can be used; in this exemplary embodiment, these are two planetary transmissions. The test apparatus 3 is constructed symmetrically here, and thus a second electromechanical device 4 is also present. A rotor bearing unit 1 is located at the center, connected to the transmission 2 and, for example, supporting the planet carriers of the two planetary transmissions 2. Therefore, the two planetary transmissions 2 are connected to each other via the rotor bearing unit 1. This type of structure is suitable because its performance is particularly well-suited for testing or verifying wind turbine transmissions, i.e., transmissions for wind turbines, and also suitable for wind turbine generators and corresponding transmission / generator combinations, as they often have a nominal power greater than 3MW. The two electromechanical devices 4 enable the independent, pre-determined torque and speed at which the transmission component 2 to be tested or loaded can be tested.

[0045] In summary, the present invention relates to a rotor bearing unit for testing transmission components. To improve the arrangement for testing transmission components, a rotor bearing unit is proposed having a shaft portion, a guide box, and a housing portion, wherein the shaft portion is rotatably mounted relative to the housing portion, wherein the housing portion is frictionally locked to the guide box, wherein the housing portion of the rotor bearing unit is designed for force-fit and / or form-fit connection to the housing of the transmission component under test, and wherein the shaft portion of the rotor bearing unit is designed for force-fit and / or form-fit connection to the shaft of the transmission component under test. The invention also relates to a testing apparatus having this type of rotor bearing unit, wherein the testing apparatus further includes a transmission component under test, particularly a transmission or planetary transmission, wherein the housing portion of the rotor bearing unit is force-fit and / or form-fit connection to the housing of the transmission component under test, and wherein the shaft portion of the rotor bearing unit is force-fit and / or form-fit connection to the shaft of the transmission component under test.

Claims

1. A rotor bearing unit (1) for testing a transmission component (2), wherein the rotor bearing unit (1) has a shaft portion (11), a guide box (12), and a housing portion (13), wherein the shaft portion (11) is rotatably arranged relative to the housing portion (13), wherein the housing portion (13) is connected to the guide box (12), wherein the shaft portion (11) of the rotor bearing unit (1) is designed for force-fitting and / or form-fitting connection with the shaft (22) of the transmission component (2) to be tested. Its features are, The housing portion (13) is connected to the guide box (12) by friction locking. The housing portion (13) of the rotor bearing unit (1) is designed to be force-fitted and / or form-fitted to the housing (21) of the transmission component (2) to be tested.

2. The rotor bearing unit (1) according to claim 1, wherein the transmission component (2) to be tested is a transmission device.

3. The rotor bearing unit (1) according to claim 1 or 2, wherein the housing portion (13) has a housing flange for fastening the housing (21) of the transmission component (2) to be tested with the housing (21) by means of an axially oriented fastening device for joint rotation.

4. The rotor bearing unit (1) according to claim 1 or 2, wherein the housing portion (13) has an axially oriented blind hole having an internal thread that is threaded to the housing (21) of the transmission component (2) to be tested.

5. The rotor bearing unit (1) according to claim 1 or 2, wherein, The housing portion (13) is configured as a mirror image.

6. The rotor bearing unit (1) according to claim 1 or 2, wherein, The guide box has a first part (121) and a second part (122), wherein the friction locking level of the friction locking connection (30) can be set by a predetermined distance (d) between the first part (121) and the second part (122) of the guide box (12) and / or by a tribological contact configuration between the housing part (13) and the guide box (12).

7. The rotor bearing unit (1) according to claim 6, wherein the first portion (121) and / or the second portion (122) have a wear-resistant sliding surface facing the housing portion (13).

8. The rotor bearing unit (1) according to claim 7, wherein the wear-resistant sliding surface is formed of a PVD hard material layer and / or a DLC layer.

9. The rotor bearing unit (1) according to claim 1 or 2, wherein the transmission component (2) to be tested is a planetary transmission.

10. A test apparatus (3) having a rotor bearing unit (1) according to any one of claims 1 to 9, wherein the test apparatus (3) further has the transmission component (2) to be tested, wherein the housing portion (13) of the rotor bearing unit (1) is connected to the housing (21) of the transmission component (2) to be tested in a force-fit and / or form-fit manner, wherein the shaft portion (11) of the rotor bearing unit (1) is connected to the shaft (22) of the transmission component (2) to be tested in a force-fit and / or form-fit manner.

11. The test apparatus (3) according to claim 10, wherein the transmission component (2) to be tested is a transmission device.

12. The test apparatus (3) according to any one of claims 10 and 11, wherein the transmission component (2) or transmission device to be tested is configured for use in a wind turbine.

13. The test apparatus (3) according to any one of claims 10 to 11, wherein the nominal power of the transmission component (2) to be tested is greater than 3MW.

14. The test apparatus (3) according to any one of claims 10 to 11, wherein the test apparatus (3) is arranged in a back-to-back manner.

15. The test apparatus (3) according to any one of claims 10 to 11, wherein the transmission component (2) to be tested is connected to the electric motor (4).

16. The test apparatus (3) according to claim 11, wherein the transmission component (2) to be tested is a planetary transmission.

17. Use of the rotor bearing unit (1) according to any one of claims 1 to 9 and / or the test apparatus (3) according to any one of claims 10 to 16 for testing planetary drives for wind turbines.

18. The use according to claim 17, wherein the ring gear of the planetary gear serves as the housing (21), and the sun shaft and / or planet carrier shaft of the planetary gear serves as the shaft (22).

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