Ground test loading device for cabin of wind turbine generator

Abstract

The invention relates to the technical field of wind power, in particular to a wind turbine generator cabin ground test loading device. A non-torque loading unit of the wind turbine generator cabin ground test loading device comprises an outer end fixing seat, a middle connecting flange and a direction loading assembly. The middle connecting flange is movably connected with the outer end fixing seat; the direction loading assembly is used for applying load to the middle connecting flange in at least one direction; the output connecting flange is connected with the middle connecting flange and is used for being connected with cabin equipment to be tested; the first driving unit and the second driving unit are connected to the two ends of the non-torque loading unit, and the first driving unit and the second driving unit operate synchronously and are in transmission connection with the middle connecting flange. According to the wind turbine generator cabin ground test loading device, a double-driving-unit arrangement mode is adopted, direct driving is achieved through torques of the two driving units, and therefore the wind turbine generator cabin ground test loading device has the high response capacity, meanwhile, the manufacturing and using cost can be reduced, and the application range can be widened.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and in particular to a ground test loading device for a cabin of a wind turbine generator set. Background Art

[0002] There are currently three main six-degree-of-freedom dynamic loading technologies for wind turbines: the first is to achieve torque loading with an asynchronous motor and a main gearbox, and to build a five-degree-of-freedom non-torque load device with a cylinder actuator to achieve full-degree-of-freedom load test loading for the wind turbine, and the non-torque load device and the torque loading device are connected through an axial radial compensation coupling; the second is based on the first solution, but the axial radial compensation coupling is cancelled, and a three-way floating static pressure sliding bearing is used in the fixed support structure design of the main gearbox to achieve deformation compensation between the non-torque load device and the gearbox output shaft; the third uses a low-speed direct-drive synchronous motor, in which the rotor bracket is directly and rigidly connected to the non-torque loading device, which is arranged on both sides of the center of the generator, and supported by the motor stator housing cylinder actuator to compensate for the non-torque load transmitted to the generator and the weight of the motor itself.

[0003] For the first solution, the high-torque coupling used is expensive, and the main gearbox used to increase torque requires an additional lubrication and cooling system for the main gearbox. At the same time, the test bench test must basically meet the requirements of multiple equipment tests. The fatigue characteristics of the equipment on the test bench must be better than those of the test equipment. Obviously, it has a gear transmission method, and its gears and bearings are difficult to meet in this regard. For the second solution, a hydrostatic bearing is used to realize a floating main gearbox, and a set of continuous high-pressure equipment needs to be added separately to ensure that the main gearbox can be separated under static conditions. At the same time, the radial compensation distance of the shaft that can be achieved by this solution is small. At the same time, the main gearbox is still used for torque increase, which requires additional lubrication and cooling, and has poor applicability in fatigue testing. For the third solution, a low-speed direct drive is used to eliminate the related problems caused by the gearbox and the coupling compensation problem, but the low-speed direct drive motor has a huge structural size and a high unit cost, and has high requirements for the hoisting capacity and height of the plant.

[0004] From the perspective of control response, although the first and second gear transmission systems have the advantage of requiring smaller drive motors, their dynamic response capabilities of applying torque are lower than those of direct drive systems, and their response of the applied equipment is poor when testing complex loads. Summary of the invention

[0005] The purpose of the present invention includes providing a ground test loading device for a wind turbine cabin, which adopts a dual drive unit setting mode and is directly driven by the torque of the two drive units, so as to have a faster response capability. At the same time, the non-torque loading unit is arranged in the middle of the two drive units. The non-torque loading unit can realize the load in at least one direction, thereby avoiding the problems of high manufacturing cost and large structural size of the original single motor drive, thereby reducing the cost of production and use, and reducing the requirements for installation and use while reducing the overall volume and weight, thereby expanding the scope of application.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] The present invention provides a wind turbine cabin ground test loading device, the wind turbine cabin ground test loading device comprises a non-torque loading unit, an output connection flange, a first drive unit and a second drive unit;

[0008] The non-torque loading unit includes an outer end fixing seat, an intermediate connecting flange and a directional loading assembly; the intermediate connecting flange is movably connected to the outer end fixing seat; the directional loading assembly is used to apply a load to the intermediate connecting flange in at least one direction;

[0009] The output connecting flange is connected to the intermediate connecting flange and is used to connect to the cabin equipment to be tested;

[0010] The first drive unit and the second drive unit are connected to two ends of the non-torque loading unit, and the first drive unit and the second drive unit are synchronously operated and transmission-connected with the middle connecting flange.

[0011] In an optional embodiment, the wind turbine cabin ground test loading device also includes a test base, a first motor support cylinder and a second motor support cylinder. The first motor support cylinder and the second motor support cylinder are both connected to the test base and are used to support the first drive unit and the second drive unit, respectively.

[0012] In an optional embodiment, the outer end fixing seat is movably connected to a fixing pin, and the fixing pin is used to connect to the test base.

[0013] In an optional embodiment, the first drive unit includes a first motor stator frame, a first motor stator base, a first motor rotor and a first motor bearing;

[0014] The first motor stator frame is connected to the first motor stator base; the first motor rotor is rotatably connected to the first motor stator frame through the first motor bearing, and the first motor rotor is drivingly connected to the intermediate connecting flange;

[0015] The first motor supporting oil cylinder is connected to the first motor stator frame.

[0016] In an optional embodiment, the first motor bearing includes a first bearing outer ring and a first bearing inner ring;

[0017] The first bearing outer ring is connected to the first motor stator base, and the first bearing inner ring is connected to the first motor rotor, the middle connecting flange and the output connecting flange.

[0018] In an optional embodiment, the second driving unit includes a second motor rotor, a second motor stator base and a second motor bearing;

[0019] The second motor rotor is rotatably connected to the second motor stator base through a second motor bearing, and the second motor rotor is drivingly connected to the middle connecting flange;

[0020] The second motor supporting oil cylinder is connected to the second motor stator base.

[0021] In an optional embodiment, the second motor bearing includes a second bearing outer ring and a second bearing inner ring;

[0022] The second bearing outer ring is connected to the second motor rotor and the middle connecting flange, and the second bearing inner ring is connected to the second motor stator base.

[0023] In an optional embodiment, the directional loading assembly includes at least a first directional loading member, a second directional loading member, and a third directional loading member;

[0024] The first direction loading member is used to apply a load to the intermediate connecting flange along a first direction, the second direction loading member is used to apply a load to the intermediate connecting flange along a second direction, and the third direction loading member is used to apply a load to the intermediate connecting flange along a third direction;

[0025] The first direction, the second direction and the third direction are perpendicular to each other.

[0026] In an optional embodiment, the first direction loading member includes a first thrust cylinder, the second direction loading member includes a second thrust cylinder, and the third direction loading member includes a third thrust cylinder;

[0027] Both ends of the first thrust cylinder and the second thrust cylinder are respectively connected to the test base and the outer end fixing seat, and both ends of the third thrust cylinder are respectively connected to the outer end fixing seat and the middle connecting flange.

[0028] In an optional embodiment, the non-torque loading unit further includes a first torque bearing and a second torque bearing which are spaced apart from each other; the intermediate connecting flange is movably connected to the outer end fixing seat via the first torque bearing and the second torque bearing.

[0029] The beneficial effects of the wind turbine cabin ground test loading device provided by the embodiment of the present invention include:

[0030] The wind turbine cabin ground test loading device comprises a non-torque loading unit, an output connecting flange, a first drive unit and a second drive unit; the non-torque loading unit comprises an outer end fixing seat, an intermediate connecting flange and a directional loading assembly; the intermediate connecting flange is movably connected to the outer end fixing seat; the directional loading assembly is used to apply a load to the intermediate connecting flange along at least one direction; the output connecting flange is connected to the intermediate connecting flange and is used to be connected to the cabin equipment to be tested; the first drive unit and the second drive unit are connected to both ends of the non-torque loading unit, and the first drive unit and the second drive unit operate synchronously and are transmission-connected to the intermediate connecting flange.

[0031] The wind turbine cabin ground test loading device adopts a dual drive unit setting mode, which is directly driven by the torque of the two drive units, so that it has a faster response capability. At the same time, the non-torque loading unit is arranged in the middle of the two drive units. The non-torque loading unit can realize the load in at least one direction, thereby avoiding the problems of high manufacturing cost and large structural size of the original single motor drive, thereby reducing the cost of production and use, and reducing the requirements for installation and use while reducing the overall volume and weight, thereby expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of the connection of the cabin equipment to be tested provided in this embodiment;

[0034] Figure 2 A schematic diagram of the installation of the cabin equipment to be tested provided in this embodiment;

[0035] Figure 3 for Figure 2 The local schematic diagram of the A in the middle;

[0036] Figure 4 for Figure 2 The local schematic diagram of point B in the middle;

[0037] Figure 5 A schematic diagram of load application for the cabin equipment connection to be tested provided in this embodiment.

[0038] Icons: 100-connection of the equipment in the cabin to be tested; 200-ground test loading device for the cabin of the wind turbine; 210-non-torque loading unit; 230-output connection flange; 250-first drive unit; 270-second drive unit; 211-outer end fixing seat; 212-middle connection flange; 213-direction loading assembly; 201-test base; 202-first motor support cylinder; 203-second motor support cylinder; 204-fixed pin shaft; 251-first motor stator frame; 2 52-first motor stator base; 253-first motor rotor; 254-first motor bearing; 255-first bearing outer ring; 256-first bearing inner ring; 271-second motor rotor; 272-second motor stator base; 273-second motor bearing; 274-second bearing outer ring; 275-second bearing inner ring; 214-first direction loading member; 215-second direction loading member; 216-third direction loading member; 217-first moment bearing; 218-second moment bearing. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] Please refer to Figure 1-Figure 5 , this embodiment provides a wind turbine cabin ground test loading device 200, the wind turbine cabin ground test loading device 200 includes a non-torque loading unit 210, an output connection flange 230, a first drive unit 250 and a second drive unit 270;

[0046] The non-torque loading unit 210 includes an outer end fixing seat 211, an intermediate connecting flange 212, and a directional loading assembly 213; the intermediate connecting flange 212 is movably connected to the outer end fixing seat 211; the directional loading assembly 213 is used to apply a load to the intermediate connecting flange 212 along at least one direction;

[0047] The output connection flange 230 is connected to the intermediate connection flange 212 and is used to connect to the cabin equipment to be tested 100;

[0048] The first driving unit 250 and the second driving unit 270 are connected to two ends of the non-torque loading unit 210 , and the first driving unit 250 and the second driving unit 270 operate synchronously and are drivingly connected to the middle connecting flange 212 .

[0049] Please refer to Figure 1-Figure 5 The working principle of the wind turbine cabin ground test loading device 200 is:

[0050] The wind turbine cabin ground test loading device 200 includes a non-torque loading unit 210, an output connecting flange 230, a first drive unit 250 and a second drive unit 270; the non-torque loading unit 210 includes an outer end fixing seat 211, an intermediate connecting flange 212 and a directional loading assembly 213; the intermediate connecting flange 212 is movably connected to the outer end fixing seat 211; the directional loading assembly 213 is used to apply a load to the intermediate connecting flange 212 along at least one direction; the output connecting flange 230 is connected to the intermediate connecting flange 212 and is used to be connected to the cabin equipment to be tested 100; and the first drive unit 250 and the second drive unit 270 are connected to the two ends of the non-torque loading unit 210, and the first drive unit 250 and the second drive unit 270 operate synchronously and are transmission-connected to the intermediate connecting flange 212. Thus, during use, the first drive unit 250 and the second drive unit 270 can work to drive the intermediate connection flange 212 to rotate in a direct drive manner, thereby applying torque to the cabin equipment to be tested that is transmission-connected to the intermediate connection flange 212; in addition, through the setting of the direction loading component 213, a load can be applied to the cabin equipment to be tested in at least one direction through the intermediate connection flange 212, and the direction of application can be adjusted according to actual use requirements;

[0051] In summary, the wind turbine cabin ground test loading device 200 adopts a dual drive unit setting, which is directly driven by the torque of the two drive units, so that it has a faster response capability. At the same time, the non-torque loading unit 210 is arranged in the middle of the two drive units. The non-torque loading unit 210 can realize the load in at least one direction, thereby avoiding the problems of high manufacturing cost and large structural size of the original single motor drive, thereby reducing the cost of production and use, and reducing the requirements for installation and use while reducing the overall volume and weight, thereby expanding the scope of application.

[0052] For further information, please refer to Figure 1-Figure 5In this embodiment, the wind turbine cabin ground test loading device 200 also includes a test base 201, a first motor support cylinder 202 and a second motor support cylinder 203. The first motor support cylinder 202 and the second motor support cylinder 203 are both connected to the test base 201 and are used to support the first drive unit 250 and the second drive unit 270 respectively. In this way, the first drive unit 250 and the second drive unit 270 are dynamically supported. The purpose is to support the first drive unit 250 and the second drive unit 270 during the test, so as to avoid the test being affected by the gravity of the first drive unit 250 and the second drive unit 270 during the load or torque application process; and the outer end fixing seat 211 is movably connected with a fixing pin 204, and the fixing pin 204 is used to connect with the test base 201. The purpose is to fix the outer end fixing seat 211 on the test base 201 through the fixing pin 204 according to the needs of testing or installation. It should be noted that the first motor support cylinder 202 and the second motor support cylinder 203 are both hydraulic cylinders, and are arranged in pairs on both sides of the first drive unit 250 and the second drive unit 270, that is, this embodiment includes two first motor support cylinders 202 and two second motor support cylinders 203.

[0053] For further information, please refer to Figure 1-Figure 5 In the present embodiment, when configuring the first drive unit 250 and the second drive unit 270, they are both configured as drive motors. Based on this, the first drive unit 250 includes a first motor stator frame 251, a first motor stator base 252, a first motor rotor 253 and a first motor bearing 254; the first motor stator frame 251 is connected to the first motor stator base 252; the first motor rotor 253 is rotatably connected to the first motor stator frame 251 through the first motor bearing 254, and the first motor rotor 253 is transmission-connected to the intermediate connecting flange 212; the first motor supporting cylinder 202 is connected to the first motor stator frame 251.

[0054] Moreover, the first motor bearing 254 includes a first bearing outer ring 255 and a first bearing inner ring 256; the first bearing outer ring 255 is connected to the first motor stator base 252, and the first bearing inner ring 256 is connected to the first motor rotor 253, the intermediate connecting flange 212 and the output connecting flange 230.

[0055] The second driving unit 270 includes a second motor rotor 271, a second motor stator base 272 and a second motor bearing 273; the second motor rotor 271 is rotatably connected to the second motor stator base 272 through the second motor bearing 273, and the second motor rotor 271 is transmission-connected to the intermediate connecting flange 212; the second motor supporting cylinder 203 is connected to the second motor stator base 272.

[0056] The second motor bearing 273 includes a second bearing outer ring 274 and a second bearing inner ring 275 ; the second bearing outer ring 274 is connected to the second motor rotor 271 and the middle connecting flange 212 , and the second bearing inner ring 275 is connected to the second motor stator base 272 .

[0057] Therefore, through the structural setting of the above-mentioned drive unit, torque can be applied to the intermediate connection flange 212 through the two drive motors, and then transmitted to the cabin equipment to be tested through the intermediate connection flange 212. It should be noted that the above-mentioned structural setting is based on the synchronous operation of the first drive unit 250 and the second drive unit 270, so that in this way, the structural volume and weight of the first drive unit 250 and the second drive unit 270 can be reduced while meeting the use requirements.

[0058] For further information, please refer to Figure 1-Figure 5 In this embodiment, the directional loading component 213 includes at least a first directional loading component 214, a second directional loading component 215 and a third directional loading component 216; that is, the directional loading component 213 adopted in this embodiment can apply loads along the first direction, the second direction and the third direction, and the first direction, the second direction and the third direction are perpendicular to each other, and the first direction, the second direction and the third direction correspond to the X, Y and Z directions in the space respectively (as shown by the marks X, Y and Z in the figure).

[0059] Specifically, the first direction loading member 214 is used to apply a load to the middle connecting flange 212 along a first direction, the second direction loading member 215 is used to apply a load to the middle connecting flange 212 along a second direction, and the third direction loading member 216 is used to apply a load to the middle connecting flange 212 along a third direction.

[0060] Among them, when configuring the first direction loading member 214, the second direction loading member 215 and the third direction loading member 216, the first direction loading member 214 includes a first thrust cylinder, the second direction loading member 215 includes a second thrust cylinder, and the third direction loading member 216 includes a third thrust cylinder; that is, the first thrust cylinder, the second thrust cylinder and the third thrust cylinder are all hydraulic cylinders, and are configured in pairs on both sides of the non-torque loading unit 210, that is, the present embodiment includes two first thrust cylinders, two second thrust cylinders and two third thrust cylinders.

[0061] Furthermore, both ends of the first thrust cylinder and the second thrust cylinder are respectively connected to the test base 201 and the outer end fixing seat 211 , and both ends of the third thrust cylinder are respectively connected to the outer end fixing seat 211 and the middle connecting flange 212 .

[0062] It should be noted that in order for the second thrust cylinder to transfer the load to the cabin equipment to be tested when applying the load in the second direction, that is, in the Y direction, the non-torque loading unit 210 also includes a first torque bearing 217 and a second torque bearing 218 arranged at intervals; the intermediate connecting flange 212 is movably connected to the outer end fixing seat 211 through the first torque bearing 217 and the second torque bearing 218.

[0063] Based on the above, please refer to Figure 1-Figure 5 The wind turbine cabin ground test loading device 200 can apply torque using the first drive unit 250 and the second drive unit 270, and can also apply loads in three directions through the non-torque loading unit 210;

[0064] Specifically, by arranging the first drive unit 250 and the second drive unit 270 at the two ends of the non-torque loading unit 210 along the Y direction, when both the first drive unit 250 and the second drive unit 270 adopt drive motors, the two drive motors are connected in series, and the load application form based on direct drive can avoid the demand for load deformation compensation, that is, the driving torque Mx of the cabin equipment to be tested is realized by two low-speed synchronous drive motors, and the loading of the remaining five degrees of freedom is performed by hydraulic cylinder loading. The entire non-torque loading unit 210 is arranged in the middle of the two drive motors. The non-torque loading unit 210 and the two drive motors transmit force and torque through the intermediate connecting flange 212. The non-torque loading unit 210 is composed of the intermediate connecting flange 212, two torque bearings and an outer end fixing seat 211. The outer end fixing seat 211 It is connected to the aforementioned first direction loading member 214, the second direction loading member 215 and the third direction loading member 216, that is, it is connected to the aforementioned first thrust cylinder, the second thrust cylinder and the thrust cylinder, so as to transmit the thrust generated by them to the intermediate connecting flange 212 through the outer end fixing seat 211. The intermediate connecting flange 212 is respectively connected to the bearing rings on the two driving motors. Since the force and torque generated by the thrust generated by the cylinder need to be finally transmitted to the test cabin equipment, in order to ensure that the load transmitted by the connecting flange is transmitted to the stator housing base through the generator bearing ring, the motor stator housing base also needs to be supported by a cylinder, so as to reversely compensate for the load transmitted on the motor bearing and finally transmit it to the test cabin equipment. Therefore, the above-mentioned first motor support cylinder 202 and second motor support cylinder 203 are provided;

[0065] Based on the above content, including two first motor support cylinders 202, two second motor support cylinders 203, two first thrust cylinders, two second thrust cylinders and two third thrust cylinders, that is, a total of 10 cylinder actuators are provided to realize the non-torque loading of the five degrees of freedom of the cabin equipment to be tested. The use of such a multi-cylinder arrangement, on the one hand, can reduce the problem of excessive cylinder diameter of a single cylinder and the cylinder execution pressure, thereby reducing the pressure requirement on the hydraulic equipment; on the other hand, some of the 10 cylinders are used as generator reverse load compensation.

[0066] When performing the entire mechanical load analysis, the drive motor and the non-torque loading unit 210 are analyzed as a whole, and the entire force transmission center is at the center of the non-torque loading unit 210. For the non-torque loading unit 210, it can realize five-degree-of-freedom loading, and the loads formed are:

[0067] The first thrust cylinder acts as an axial thrust cylinder to generate a force Fx in the X direction, the second thrust cylinder acts as a horizontal thrust cylinder to generate a force Fy in the Y direction, and the center of the non-torque loading unit 210 forms a torque with the cabin equipment to be tested to generate a bending moment Mz on the Z axis, and the third thrust cylinder acts as a vertical thrust cylinder to generate a force Fz in the Z direction; the stator housing bases of the first drive unit 250 and the second drive unit 270 are respectively composed of two vertical motor support cylinders, namely, the first motor support cylinder 202 and the second motor support cylinder 203. The function of the first motor support cylinder 202 and the second motor support cylinder 203 is to support the weight of the motor itself. On the other hand, the first motor support cylinder 202 and the second motor support cylinder 203 form a bending moment My with the center of the non-torque loading unit 210, which is loaded on the cabin equipment to be tested.

[0068] In summary, please refer to Figure 1-Figure 5 The Fx, Fy, Fz, Mx, My and Mz required for the test of the cabin equipment are transmitted by the output connecting flange 230, wherein Mx represents the driving torque required for the rotation of the cabin equipment, which is provided by the combined torque generated by the first motor rotor 253 in the first drive unit 250 and the second motor rotor 271 in the second drive unit 270; the loads Fx, Fy, Fz, My and Mz of the remaining five degrees of freedom can be collectively referred to as non-torque loads.

[0069] Among them, the first thrust cylinder in the non-torque loading unit 210 generates a force Fx in the X direction, the second thrust cylinder generates a force Fy in the Y direction, and the Z-axis Mz bending moment generated by the distance between the center point of the intermediate connecting flange 212 and the output connecting flange 230, and the third thrust cylinder generates a force Fz in the Z direction; the first motor bearing 254 and the second motor bearing 273 used in the first drive unit 250 and the second drive unit 270 have the function of transmitting bending moment and force, so the first motor stator base 252 and The second motor stator base 272 cannot be directly fixed to the test base 201, otherwise all bending moments and force values ​​generated in the non-torque loading unit 210 will be directly transmitted to the motor bearings and will not be transmitted to the output connecting flange 230. Therefore, the first motor stator base 252 and the second motor stator base 272 respectively use a unidirectional first motor support cylinder 202 and a second motor support cylinder 203 to bear the load in the gravity direction of the entire motor. At the same time, the center loading distance between the cylinder and the middle connecting flange 212 forms a bending moment My.

[0070] Since the non-torque loading unit 210 is supported by only one Z-direction cylinder in the gravity direction (Z direction), during the initial installation, the non-torque loading unit 210 is mainly installed on the test base 201 using the fixed pin 204, and then other cylinders are fixedly installed. At the same time, during the shutdown of the test bench, in order to avoid cylinder oil leakage or power failure, the fixed pin 204 mainly supports the weight of the entire experimental equipment. Of course, when only torque loading is required, the fixed pin 204 can also be fixed.

[0071] In summary, the wind turbine cabin ground test loading device 200 adopts two series-connected direct-drive motors, which are driven by the torque of the two motors to avoid the problems of high manufacturing cost and large structural size of the original single motor drive. At the same time, the non-torque loading unit 210 is arranged in the middle of the two direct-drive motors. The non-torque loading unit 210 has 6 cylinder actuators, which can realize the five directional loads of Fx, Fy, Fz, Mz and My respectively.

[0072] The first motor support cylinder 202 and the second motor support cylinder 203 are used to bear the load in the gravity direction of the entire motor, and at the same time, the center loading distance between the cylinder and the middle connecting flange 212 forms the My bending moment; the stator sides of the two direct-drive motors are also supported by cylinders, which are used to offset the weight of the generator itself (including the weight transferred to the stator by the rotor through the bearing), and on the other hand, to offset and compensate the loads Fz and My transmitted by the non-torque loading device, to ensure that the load transmitted to the test cabin equipment is the required load. At the same time, because the hydraulic cylinder of the generator support system itself offsets the influence of the non-torque bending moment on the motor rotor load, the deformation compensation requirement caused by the connection system load between torque loading and non-torque loading is avoided;

[0073] The non-torque loading unit 210 is integrated with a fixing pin hole, and the fixing pin shaft 204 can be used to install the non-torque loading unit 210 to the test base 201, so that during the shutdown of the test bench, in order to avoid oil leakage or power failure in the cylinder, the fixing pin shaft 204 can support the weight of the entire experimental equipment. At the same time, when only torque loading is required, the fixing pin shaft 204 can also be fixed to unload all cylinder pressure.

[0074] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A wind turbine cabin ground test loading device, characterized in that: The wind turbine cabin ground test loading device comprises a non-torque loading unit, an output connection flange, a first drive unit and a second drive unit; The non-torque loading unit comprises an outer end fixing seat, an intermediate connecting flange and a directional loading assembly; the intermediate connecting flange is movably connected to the outer end fixing seat; the directional loading assembly is used to apply a load to the intermediate connecting flange in at least one direction; The output connecting flange is connected to the intermediate connecting flange and is used to connect to the cabin equipment to be tested; The first drive unit and the second drive unit are connected to two ends of the non-torque loading unit, and the first drive unit and the second drive unit operate synchronously and are drivingly connected to the middle connecting flange.

2. The wind turbine cabin ground test loading device according to claim 1 is characterized in that: The wind turbine cabin ground test loading device also includes a test base, a first motor support cylinder and a second motor support cylinder. The first motor support cylinder and the second motor support cylinder are both connected to the test base and are used to support the first drive unit and the second drive unit respectively.

3. The wind turbine cabin ground test loading device according to claim 2 is characterized in that: The outer end fixing seat is movably connected with a fixing pin shaft, and the fixing pin shaft is used to be connected with the test base.

4. The wind turbine cabin ground test loading device according to claim 3 is characterized in that: The first driving unit includes a first motor stator frame, a first motor stator base, a first motor rotor and a first motor bearing; The first motor stator frame is connected to the first motor stator base; the first motor rotor is rotatably connected to the first motor stator frame through the first motor bearing, and the first motor rotor is drivingly connected to the intermediate connecting flange; The first motor supporting oil cylinder is connected to the first motor stator frame.

5. The wind turbine cabin ground test loading device according to claim 4 is characterized in that: The first motor bearing comprises a first bearing outer ring and a first bearing inner ring; The first bearing outer ring is connected to the first motor stator base, and the first bearing inner ring is connected to the first motor rotor, the intermediate connecting flange and the output connecting flange.

6. The wind turbine cabin ground test loading device according to claim 2 is characterized in that: The second driving unit includes a second motor rotor, a second motor stator base and a second motor bearing; The second motor rotor is rotatably connected to the second motor stator base through the second motor bearing, and the second motor rotor is drivingly connected to the intermediate connecting flange; The second motor supporting oil cylinder is connected to the second motor stator base.

7. The wind turbine cabin ground test loading device according to claim 6 is characterized by: The second motor bearing comprises a second bearing outer ring and a second bearing inner ring; The second bearing outer ring is connected to the second motor rotor and the intermediate connecting flange, and the second bearing inner ring is connected to the second motor stator base.

8. The wind turbine cabin ground test loading device according to any one of claims 1 to 7, characterized in that: The directional loading component at least includes a first directional loading member, a second directional loading member and a third directional loading member; The first direction loading member is used to apply a load to the intermediate connection flange along a first direction, the second direction loading member is used to apply a load to the intermediate connection flange along a second direction, and the third direction loading member is used to apply a load to the intermediate connection flange along a third direction; The first direction, the second direction and the third direction are perpendicular to each other.

9. The wind turbine cabin ground test loading device according to claim 8, characterized in that: The first direction loading member includes a first thrust cylinder, the second direction loading member includes a second thrust cylinder, and the third direction loading member includes a third thrust cylinder; Both ends of the first thrust cylinder and the second thrust cylinder are respectively connected to the test base and the outer end fixing seat, and both ends of the third thrust cylinder are respectively connected to the outer end fixing seat and the middle connecting flange.

10. The wind turbine cabin ground test loading device according to claim 9, characterized in that: The non-torque loading unit further comprises a first torque bearing and a second torque bearing which are arranged at intervals; the intermediate connecting flange is movably connected to the outer end fixing seat via the first torque bearing and the second torque bearing.

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