Dragging test device

Abstract

The application relates to a drag test device, which comprises a supporting assembly, a driving assembly and a connecting assembly. The supporting assembly comprises a first supporting assembly and a second supporting assembly arranged along a first direction. The first supporting assembly comprises a first supporting plate and a plurality of first driving members arranged on the first supporting plate. The first driving members are adjustable in the extension dimension along the first direction. The second supporting assembly is movable along a second direction and a third direction relative to the first supporting assembly. The first direction, the second direction and the third direction are arranged to intersect with each other. The driving assembly is arranged on the side of the second supporting assembly away from the first supporting assembly. The driving assembly has an output shaft. One end of the connecting assembly is detachably connected with the output shaft, and the other end is used for transmission connection with an input shaft of a tested member. The connecting assembly comprises a universal coupling. The drag test device provided by the application is convenient to operate and high in test precision.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a drag testing device. Background Technology

[0002] In existing wind turbine generator sets, there are typically components such as a rotating shaft, gearbox, and generator that are sequentially connected to the rotor. The gearbox, as a crucial transmission structure, usually requires a drive test before actual use to check its operation under a preset load. Current gearbox testing typically uses either converter reverse drive or belt drive. However, converter reverse drive is prone to problems at high speeds, such as decreased inductance, inaccurate moment of inertia identification, and current harmonics that can induce LC resonance in the power grid. Belt drive, on the other hand, is prone to elastic slippage leading to instantaneous transmission ratio fluctuations and the risk of static electricity buildup.

[0003] Therefore, there is an urgent need for a drag-and-drop testing device that is easy to operate and has high testing accuracy. Utility Model Content

[0004] This application provides a drag-and-drop testing device that is easy to operate and has high testing accuracy.

[0005] In a first aspect, according to an embodiment of this application, a drag testing device is provided for drag testing a test piece, comprising: a support assembly, including a first support assembly and a second support assembly arranged along a first direction, the first support assembly including a first support plate and a plurality of first driving members disposed on the first support plate, the extension dimension of the first driving members in the first direction being adjustable, the second support assembly being movable relative to the first support assembly along a second direction and a third direction, the first direction, the second direction and the third direction being arranged intersecting each other; a drive assembly disposed on the side of the second support assembly away from the first support assembly, the drive assembly having an output shaft; and a connecting assembly, one end of the connecting assembly being detachably connected to the output shaft, and the opposite end being used for transmission connection with the input shaft of the test piece, the connecting assembly including a universal coupling.

[0006] According to one aspect of the embodiments of this application, the second support component includes a first sub-component and a second sub-component, the first sub-component being connected between the second sub-component and the first support component; the first sub-component is movable relative to the first support component along one of a second direction and a third direction, and the second sub-component is movable relative to the first sub-component along the other of the second direction and the third direction.

[0007] According to one aspect of the embodiments of this application, the first sub-component includes a second support plate and a second driving member connected to the second support plate, and the second sub-component includes a third support plate and a third driving member connected to the third support plate; the first driving member, the second driving member and the third driving member are all hydraulic driving members.

[0008] According to one aspect of the embodiments of this application, the first sub-component includes two second driving members, which are respectively disposed on opposite sides of the second support plate and are symmetrically arranged; the second sub-component includes two third driving members, which are respectively disposed on opposite sides of the third support plate and are symmetrically arranged.

[0009] According to one aspect of the embodiments of this application, the drag testing device further includes a hydraulic pump station, which includes a hydraulic pump assembly, an oil pipe, and a quick connector. The oil pipe connects the hydraulic pump assembly and the quick connector, and the quick connector can be plugged into any one of the first drive member, the second drive member, and the third drive member.

[0010] According to one aspect of the embodiments of this application, the drag testing device further includes a detection component and a control component. The control component is communicatively connected to the detection component, the support component, and the drive component, respectively. The detection component includes a torque sensor, a temperature sensor, an inclination sensor, a pressure sensor, and a vibration sensor. The torque sensor is disposed on the connection component, the pressure sensor and the inclination sensor are disposed on the support component, and the vibration sensor and at least some of the temperature sensors can be disposed on the test piece.

[0011] According to one aspect of the embodiments of this application, the drag testing device further includes an auxiliary lubrication system and an oil pressure sensor. The oil pressure sensor is communicatively connected to the control component. The auxiliary lubrication system is used to lubricate the test piece, and the oil pressure sensor is used to detect the oil pressure in the auxiliary lubrication system.

[0012] According to one aspect of the embodiments of this application, the drag testing device further includes an alignment component, which includes a first part and a second part, the first part and the second part being movably connected, and the second part being movable relative to the first part along the axial direction of the alignment component; the alignment component is detachably connected to the input shaft of the test piece and is coaxially arranged with the input shaft of the test piece.

[0013] According to one aspect of the embodiments of this application, the alignment component has a first end and a second end disposed opposite to each other along its own axial direction, one of the first end and the second end is provided with a connecting flange, and the other end is provided with a connecting hole recessed along the axial direction.

[0014] According to one aspect of the embodiments of this application, the connecting assembly further includes a tensioning sleeve connected between the output shaft and the universal coupling; along the axial direction of the output shaft, the size of the tensioning sleeve is L1, the size of the universal coupling is L2, the maximum size of the alignment component is L3, the minimum size of the alignment component is L4, L3 > 10% (L1 + L2), and L4 < L2.

[0015] The drag testing device provided in this application includes a support component, a drive component, and a connecting component. The support component can flexibly adjust the position of the drive component mounted on it, facilitating quick and easy alignment of the drive component with test pieces of different sizes and models. The output end of the drive component is connected to the test piece through a connecting component including a universal coupling, which enables a rigid connection between the drive component and the test piece, reducing errors caused by transmission. At the same time, the universal coupling has angle compensation capability, which can improve the purity and accuracy of torque transmission on the basis of rigid connection, thereby further improving the test accuracy. Attached Figure Description

[0016] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of a drag-and-drop testing device provided in one embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the alignment component provided in one embodiment of this application.

[0019] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0020] 100 - Drag the test equipment;

[0021] 10 - Support component; 20 - Drive component; 30 - Connection component; 40 - Control component; 50 - Alignment component;

[0022] 11-First support assembly; 12-Second support assembly; 13-First sub-component; 14-Second sub-component; 21-Output shaft; 51-First part; 52-Second part;

[0023] 111-First support plate; 112-First driving component; 131-Second support plate; 132-Second driving component; 141-Third support plate; 142-Third driving component; 511-Connecting flange; 512-Connecting hole;

[0024] X - First direction; Y - Second direction. Detailed Implementation

[0025] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0026] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the molding die and molding method of this application. It should also be noted that, unless otherwise explicitly specified and limited, "multiple" means two or more, and the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. The terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] A wind turbine generator is a device used to convert wind power into electricity. It typically consists of components such as a rotor, nacelle, and tower. The nacelle usually houses the main shaft, gearbox, and generator. The gearbox is a crucial transmission structure, used to increase the rotational speed through its transmission ratio, thereby driving the generator rotor. Therefore, before being put into actual use, the gearbox usually needs to undergo a drive test, which simulates the load during actual operation to test its stable and reliable operation.

[0029] Based on this, the applicant found that existing methods for testing gearbox drag drives typically employ either inverter reverse drive or belt drive. When using inverter reverse drive at high speeds, it presents several technical challenges, including: high-frequency PWM voltage exacerbates the risk of stator winding insulation dendration, leading to a sharp drop in withstand voltage; the skin effect causes a decrease in inductance and inaccurate moment of inertia identification, resulting in control system overshoot; current harmonics easily induce LC resonance in the power grid, threatening the safety of power devices; increased field weakening control depth also leads to power factor deterioration, requiring additional compensation equipment and significantly increasing system complexity. Belt drives, on the other hand, suffer from elastic slippage causing instantaneous transmission ratio fluctuations, interfering with gear phase analysis accuracy; environmental temperature and humidity changes force the system to rely on costly hydraulic tensioning mechanisms to maintain tension; and the risk of static electricity buildup. Therefore, these methods result in lower accuracy and reliability in drag tests.

[0030] To address the aforementioned issues, this application provides a drag-and-drop testing device that is adaptable to gearboxes of different models and sizes and improves testing accuracy. Furthermore, the device includes a drive assembly, enabling independent drag-and-drop testing of the gearbox without connecting it to generators or other equipment. This allows for independent testing of the generator and gearbox at different locations, reducing testing and transportation costs.

[0031] It is understood that the following embodiments of this application are only used as an example of applying the towing test equipment to a wind turbine generator set. However, the towing test equipment provided in the embodiments of this application is not limited to the following embodiments. It can also be used in other occasions where the transmission device needs to be tested and protected.

[0032] To better understand this application, the following will be combined with... Figure 1 and Figure 2 Provide a detailed description.

[0033] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a drag test device provided in one embodiment of this application.

[0034] In a first aspect, according to an embodiment of this application, a drag testing device 100 is provided for drag testing a test piece, comprising: a support assembly 10, including a first support assembly 11 and a second support assembly 12 arranged along a first direction X, the first support assembly 11 including a first support plate 111 and a plurality of first driving members 112 disposed on the first support plate 111, the extension dimension of the first driving members 112 in the first direction X is adjustable, the second support assembly 12 is movable relative to the first support assembly 11 along a second direction Y and a third direction, the first direction X, the second direction Y and the third direction being arranged intersecting each other; a drive assembly 20 disposed on the side of the second support assembly 12 away from the first support assembly 11, the drive assembly 20 having an output shaft 21; and a connecting assembly 30, one end of the connecting assembly 30 being detachably connected to the output shaft 21, and the opposite end being used for transmission connection with the input shaft of the test piece, the connecting assembly 30 including a universal coupling.

[0035] This application provides a drag testing device 100, which includes a support component 10, a drive component 20, and a connecting component 30. The support component 10 is used to adjust the position of the drive component 20, the drive component 20 is used to output torque and drag the test piece to rotate, and the connecting component 30 is used to realize the transmission connection between the drive component 20 and the connecting component 30.

[0036] Specifically, the support assembly 10 includes a first support assembly 11 and a second support assembly 12, which are arranged along the first direction X and movably connected. The drive assembly 20 is disposed on the side of the second support assembly 12 opposite to the first support assembly 11. The first support assembly 11 includes a first support plate 111 and a plurality of first drive members 112 disposed on the first support plate 111. The first support plate 111 may be a flat plate to stably support the second support assembly 12. The first drive members 112 can be used to support the first support plate 111, and the size of the first drive members 112 along the first direction X is adjustable. That is, the first drive members 112 can change their extension size by means of their own extension and contraction. By adjusting the extension size of the plurality of first drive members 112 in the first direction X, the distance and tilt angle between the first support plate 111 and the working surface on which the drag test equipment 100 is placed can be adjusted accordingly.

[0037] For example, the first support component 11 can be rectangular, and a first drive member 112 can be provided at each of the four corners of the rectangle. The extension and retraction of the four first drive members 112 can be adjusted independently. For example, before using the drag test device 100 for testing, the drive component 20 can be raised or lowered to a height position corresponding to the test piece by means of the first drive members 112, and the first support plate 111 can be leveled to improve the test accuracy.

[0038] The second support component 12 is movably connected to the first support component 11. The two can be connected via a sliding rail, threaded rod, or other relatively movable connecting component. At least a portion of the structural area of ​​the second support component 12 can move relative to the first support component 11 along the second direction X and a third direction. The first direction X, the second direction Y, and the third direction are arranged in pairs, or more preferably, in pairs perpendicular to each other. Thus, at least a portion of the structural area of ​​the second support component 12 can move freely in three directions relative to the working surface.

[0039] The drive assembly 20 is located on the side of the second support assembly 12 opposite to the first support assembly 11 and can move synchronously with the second support assembly 12, meaning the drive assembly 20 can move in three directions relative to the working surface. The drive assembly 20 may include a power source with adjustable output speed and torque. The output shaft 21 is located at the power source, which can be a servo motor or a hydraulic motor, or more specifically, a frequency converter and a high-power permanent magnet synchronous motor. The frequency converter outputs an adjustable three-phase power supply from 0Hz to 100Hz, which can precisely control the speed-torque characteristics of the motor. The use of a high-power permanent magnet synchronous motor in conjunction with the universal coupling in the connecting assembly 30 can maintain high torque accuracy and further improve the accuracy of the test.

[0040] The connecting assembly 30 is disposed on the output shaft 21 of the drive assembly 20 and is used to connect the drive assembly 20 and the test piece. The connecting assembly 30 includes a universal coupling. The compensation angle of the universal coupling can be selected as ±15°. The rotational speed fluctuations and additional bending moments caused by asymmetrical arrangement can be eliminated while maintaining the angle compensation function by ensuring phase symmetry on both sides of the universal coupling. Phase symmetry refers to the equal angles between the planes of the universal joint forks on both sides of the universal coupling and the axis. The method for maintaining symmetry can be selected as follows: first, during installation, align the engraved marks on the universal joint forks with a laser, and then maintain phase locking through bolt preload.

[0041] This setup allows for a rigid connection between the drive assembly 20 and the test piece, reducing the adverse effects of the transmission process on the accuracy and stability of the output torque, thereby further improving the accuracy of the test.

[0042] The drag test device 100 in this embodiment can directly drag the test piece to operate using the drive component 20 and the connecting component 30, eliminating the need for equipment such as a generator connected to the gearbox output terminal that is required for reverse drag using a converter; at the same time, it can improve the stability of torque transmission and improve the accuracy of testing; the relative position between the drive component 20 and the test piece can be easily adjusted through the support component 10, thereby improving the practicality and testing efficiency of the test device.

[0043] In some alternative embodiments, the second support component 12 includes a first sub-component 13 and a second sub-component 14, the first sub-component 13 being connected between the second sub-component 14 and the first support component 11; the first sub-component 13 being movable relative to the first support component 11 along one of a second direction Y and a third direction, and the second sub-component 14 being movable relative to the first sub-component 13 along the other of the second direction Y and a third direction.

[0044] Optionally, the second support component 12 in this embodiment may further include a first sub-component 13 and a second sub-component 14, with the two sub-components respectively used to realize relative movement between the second direction Y and a third direction. Specifically, the support component 10 includes a first support component 11, a first sub-component 13, and a second sub-component 14 arranged sequentially and movably connected along the first direction X. The first sub-component 13 and the second sub-component 14 can be connected by a connecting member such as a slide rail. The connecting member used can have the same or similar structure as the connecting member between the first support component 11 and the first sub-component 13 to facilitate assembly.

[0045] By separating the movement of the second support component 12 along the second direction Y and the third direction, the adjustment of the position of the drive component 20 can be more precise and the movement process can be smoother, thereby further improving the accuracy when aligning and connecting the output shaft 21 with the input shaft of the test piece.

[0046] In some optional embodiments, the first sub-component 13 includes a second support plate 131 and a second drive member 132 connected to the second support plate 131, and the second sub-component 14 includes a third support plate 141 and a third drive member 142 connected to the third support plate 141; the first drive member 112, the second drive member 132 and the third drive member 142 are all hydraulic drive members.

[0047] Optionally, the first sub-component 13 and the second sub-component 14 may each have a structural form similar to the first support assembly 11. That is, the first sub-component 13 may include a second support plate 131 and a second driving member 132 connected to the second support plate 131, and the second sub-component 14 may include a third support plate 141 and a third driving member 142 connected to the third support plate 141. The second support plate 131 and the third support plate 141 may both be flat plate-shaped pieces, which may be rectangular, circular, or other shapes. Their shapes and sizes may be set according to the required range of movement and the size of the driving assembly 20 to be supported.

[0048] Taking the first sub-component 13 being movable relative to the first support assembly 11 along the second direction Y, and the second sub-component 14 being movable relative to the first sub-component 13 along a third direction as an example, a slide rail extending along the second direction Y can be provided on the side of the first support plate 111 facing the second support assembly 12. The second support plate 131 is slidably connected to the slide rail through a sliding part, and the second driving member 132 drives the second support plate 131 to move along the slide rail. A slide rail extending along a third direction can be provided on the side of the second support plate 131 facing the third support plate 141, and the third driving member 142 drives the third support plate 141 to move along the slide rail. The third support plate 141 is used to support the driving assembly 20.

[0049] The first drive component 112, the second drive component 132, and the third drive component 142 can all be hydraulic drives, and can further be hydraulic telescopic rods. Hydraulic drives can generate large thrust with a small volume, and their operation is smooth and reliable, and their control is flexible and convenient. Setting the first, second, and third drive components as hydraulic drives can make the movement of the drive assembly 20 more accurate and smooth.

[0050] Optionally, each driving component can cooperate with a fixing component, such as a bolt and nut combination. Before moving, the fixing component can be removed or loosened so that the two can move relative to each other. After moving to the preset position by the corresponding driving component, the fixing component is locked to keep the position of the driving component 20 stable during the test.

[0051] In some optional embodiments, the first sub-component 13 includes two second driving members 132, which are respectively disposed on opposite sides of the second support plate 131 and are symmetrically arranged; the second sub-component 14 includes two third driving members 142, which are respectively disposed on opposite sides of the third support plate 141 and are symmetrically arranged.

[0052] Optionally, when setting the driving components, the first sub-component 13 may include two symmetrically arranged second driving components 132, and the second sub-component 14 may include two symmetrically arranged third driving components 142. Specifically, taking the example that the first sub-component 13 can move relative to the first support assembly 11 along the second direction Y, and the second sub-component 14 can move relative to the first sub-component 13 along a third direction, the two second driving components 132 may be symmetrically arranged on opposite sides of the second support plate 131 along the second direction Y, and the two third driving components 142 may be symmetrically arranged on opposite sides of the third support plate 141 along a third direction.

[0053] Optionally, the two symmetrically arranged driving members can have the same structural form and output force range to make the force on the support plate more balanced. It is understood that, while maintaining the symmetrical arrangement on both sides, the first sub-component 13 and the second sub-component 14 can also be provided with more driving members, such as four or six, etc., and this application does not make a specific limitation in this regard.

[0054] By setting two driving components in each sub-component, during movement, the pulling and pushing forces can be applied simultaneously through the driving components on both sides, which further improves the stability and accuracy of the support plate movement, while also increasing the upper limit of the weight that the support assembly 10 can bear and drive, and making it easier to set up the drive assembly 20.

[0055] In some alternative embodiments, the drag test device 100 further includes a hydraulic pump station, which includes a hydraulic pump assembly, oil pipes, and a quick connector. The oil pipes connect the hydraulic pump assembly and the quick connector, and the quick connector can be plugged into any of the first drive member 112, the second drive member 132, and the third drive member 142.

[0056] Optionally, the drag-and-drop testing device 100 in this embodiment may further include a hydraulic pump station, which includes a hydraulic pump assembly, oil pipes, and a quick-connect plug. The hydraulic pump assembly is used to provide driving force to the hydraulic drive components under the operation of an operator or controller. The oil pipes connect the hydraulic pump assembly and the quick-connect plug. The quick-connect plug can be plugged into any one of the first drive component 112, the second drive component 132, and the third drive component 142 to connect the hydraulic pump assembly to the drive component it is plugged into. The quick-connect plug also has a quick-plug function, enabling convenient switching between multiple hydraulic drive components.

[0057] It is understandable that, taking the first drive unit 112 as an example, in an embodiment where multiple first drive units 112 are provided simultaneously, the hydraulic pump station can be provided with multiple oil pipes and multiple quick plugs, or multiple drive units can be connected sequentially through the same quick plug.

[0058] Before using a particular drive component / group of drive components, the quick-connect plug can be connected to it, and then the corresponding support plate can be moved or leveled. By setting up this hydraulic pump station, multiple sets of hydraulic drive components can be conveniently driven through the same hydraulic source, thereby reducing the space required to set up and drag the test equipment 100.

[0059] In some optional embodiments, the drag test device 100 further includes a detection component and a control component 40, the control component 40 being communicatively connected to the detection component, the support component 10 and the drive component 20 respectively; the detection component includes a torque sensor, a temperature sensor, an inclination sensor, a pressure sensor and a vibration sensor, the torque sensor being disposed on the connection component 30, the pressure sensor and the inclination sensor being disposed on the support component 10, and the vibration sensor and at least some of the temperature sensors being disposed on the test piece.

[0060] Optionally, the drag test device 100 may also include a detection component and a control component 40. The detection component includes a variety of sensors for monitoring the status of the drag test device 100 and the test piece during the test. The control component 40 is used to control the start and stop, speed and other parameters of the drive component 20, and to control the start and stop of each drive component in the support component 10. It is also used to perform corresponding operations on the aforementioned two components based on the data collected by each sensor in the detection component.

[0061] Specifically, the detection components may include a torque sensor, a temperature sensor, a tilt sensor, a pressure sensor, and a vibration sensor. The torque sensor is disposed on the connecting assembly 30, optionally between the connecting assembly 30 and the output shaft 21 of the drive assembly 20. By placing the torque sensor closer to the drive assembly 20, the adverse effects of oil contamination and vibration on the torque sensor can be reduced, and maintenance and calibration of the sensor are easier. The torque sensor can be connected to the output shaft 21 of the drive assembly 20 via a high-precision flexible coupling to detect the torque at the output shaft 21.

[0062] Both the tilt sensor and the pressure sensor are installed on the support assembly 10. Both are used to monitor the position and tilt state of the drive assembly 20. Specifically, the tilt sensor can be installed in the area of ​​the support assembly 10 that directly supports the drive assembly 20 to achieve accurate detection of the drive assembly 20. The tilt sensor can detect whether the support structure supporting the drive assembly 20 is level, and can adjust each of the first drive members 112 according to its detection to level it.

[0063] A pressure sensor is mounted on the support assembly 10, enabling real-time monitoring of the alignment between the output shaft 21 of the drive assembly 20 and the input shaft of the test piece by measuring the difference between pressure data collected by pressure sensors located at different positions. For example, when an installation misalignment >0.1 mm / m is detected, the control assembly 40 can control each first drive component 112 to automatically compensate for the height difference, thereby eliminating the additional bending moment caused by concentricity and further improving the accuracy and safety of the test.

[0064] Temperature and vibration sensors can be installed on the test piece to monitor its temperature and vibration during the drag test. When either parameter exceeds a preset range, the drive component 20 can take corresponding measures, such as cutting off the main circuit, applying forced braking, or applying free braking.

[0065] The control component 40 is communicatively connected to each sensor in the aforementioned detection component, as well as each drive component in the drive component 20 and support component 10. This means it can be directly connected via signal lines or communicate through a signal transceiver module. The control component 40 can adjust the support component 10 and drive component 20 according to the parameters collected by the detection component and the test requirements, thereby accurately and reliably completing the drag test.

[0066] In some optional embodiments, a temperature sensor is used to collect temperature information of the test piece, and the control component 40 is configured to compare the temperature information with a preset threshold and control the drive component 20 to stop when the temperature of the test piece exceeds the preset threshold.

[0067] In an embodiment where the test piece is equipped with a temperature sensor, the temperature sensor is used to collect real-time temperature information of the test piece. The control component 40 is correspondingly configured to acquire and monitor the temperature information in real time, and compare it with a preset threshold. The specific comparison method can be implemented using logic circuits such as comparators.

[0068] Optionally, in an embodiment where the tested component is a gearbox, the temperature sensor can be configured to collect the temperature at at least one of the bearings. The temperature sensor can be a non-contact temperature sensor to reduce the possibility of interference with the rotation of the bearings and gears.

[0069] When the collected temperature information is less than or equal to the preset threshold, a drag test can be performed. When the temperature information exceeds the preset threshold, it is determined that the test piece has overheated during the test. At this time, the drive component 20 can be stopped by the control component 40 to control the drive component 20 to stop outputting torque, thereby reducing the possibility of safety problems or damage to the test piece and improving the reliability of the test.

[0070] In some alternative embodiments, the control component 40 is configured to control the drive component 20 to stop output when the temperature of the test piece is greater than 100°C.

[0071] Furthermore, in an embodiment where the temperature of the test piece is monitored in real time by a sensor, the preset temperature threshold can be selected as 100°C. When the temperature of the test piece exceeds 100°C, the control component 40 can immediately cut off the signal controlling the output torque of the drive component 20, allowing the drive component 20 and the test piece to decelerate and stop freely due to damping during their rotation. Exemplarily, in an embodiment where the drive component 20 includes a frequency converter and a motor, the frequency converter can be deactivated when the temperature exceeds the threshold, thereby achieving free stopping.

[0072] Optionally, before the aforementioned preset temperature threshold that triggers shutdown, another alarm threshold lower than the shutdown threshold can be set, such as 90°C, so that the control component 40 issues an alarm when the temperature information collected by the temperature sensor exceeds 90°C. The alarm method can be an indicator light emitting a light signal and / or a speaker emitting a sound signal, so that the operator can take action in advance and further reduce the test risk.

[0073] In some optional embodiments, the drag test device 100 also includes an auxiliary lubrication system and an oil pressure sensor, the oil pressure sensor being communicatively connected to the control component 40, the auxiliary lubrication system being used to lubricate the test piece, and the oil pressure sensor being used to detect the oil pressure within the auxiliary lubrication system.

[0074] Optionally, lubrication of bearings and other components is typically required during gearbox operation. Therefore, the drag testing device 100 in this embodiment may further include an auxiliary lubrication system and an oil pressure sensor. The auxiliary lubrication system is used to lubricate the test piece, and the oil pressure sensor is used to monitor the oil pressure of the lubricating oil in the auxiliary lubrication system in real time. Similar to other sensors in the detection assembly, the oil pressure sensor is communicatively connected to the control assembly 40.

[0075] Furthermore, in embodiments equipped with an auxiliary lubrication system and an oil pressure sensor, electrical interlocking can be implemented via the control component 40, both before and during testing. Specifically, before testing and controlling the output torque of the drive component 20, the oil pressure of the auxiliary lubrication system can be checked first. If the real-time oil pressure measured by the sensor is <1.5 bar, the drive component 20 is prohibited from starting and requires operator maintenance. Normal startup and testing are only permitted after the oil pressure reaches the required level. Simultaneously, real-time oil pressure monitoring must continue during the drag test. If the oil pressure is <1 bar, the drive component 20 is controlled to gradually decelerate until it stops. It can only be restarted after the oil pressure reaches the required level.

[0076] By setting up the aforementioned oil pressure sensor and corresponding control program, the gearbox can be well lubricated during the test, and the machine can be stopped in time if lubrication problems occur, thus further improving the reliability of the test.

[0077] Please see Figure 2 , Figure 2 This is a schematic diagram of the alignment component provided in one embodiment of this application. In some optional embodiments, the drag test device 100 further includes an alignment component 50, which includes a first part 51 and a second part 52. The first part 51 and the second part 52 are movably connected, and the second part 52 is movable relative to the first part 51 along the axial direction of the alignment component 50. The alignment component 50 is detachably connected to the input shaft of the test piece and is coaxially arranged with the input shaft of the test piece.

[0078] Optionally, to facilitate the coaxial arrangement of the output shaft 21 of the drive assembly 20 and the input shaft of the test piece, the drag test device 100 in this embodiment may further include an alignment component 50, which is used to improve the alignment accuracy of the two shafts.

[0079] Specifically, the alignment component 50 can be in the form of a cylindrical or cylindrical structure, including a first part 51 and a second part 52 that are movably connected to each other. The two can be movably connected by one being fitted onto the other. This connection method facilitates improving the coaxiality of the first part 51 and the second part 52 and achieving relative axial displacement.

[0080] When using the alignment component 50, it can first be connected to the input shaft of the test piece, optionally via a flange connection or a sleeve connection, to make the alignment component 50 coaxial with the input shaft. Then, the position of the output shaft 21 of the drive component 20 can be adjusted using the support component 10 to align it with the end of the alignment component 50 from the test piece, thereby effectively improving the coaxiality of the output shaft 21 and the input shaft. After alignment, the position of the drive component 20 is locked using the support component 10, and the first part 51 and the second part 52 are moved towards each other to shorten the size of the alignment component 50 and remove it. Then, the connection component 30 can be used to connect the output shaft 21 and the input shaft.

[0081] In some alternative embodiments, the alignment component 50 has a first end and a second end disposed opposite to each other along its own axial direction, one of the first end and the second end being provided with a connecting flange 511, and the other being provided with a connecting hole 512 recessed along the axial direction.

[0082] The alignment component 50 can be approximately cylindrical or tubular in shape, and can be locked in a circumferential relative position via an axially extending slide rail or connecting key. The alignment component 50 has a first end and a second end opposite to each other along its own axial direction, located at a first part 51 and a second part 52, respectively. One of the two ends is provided with a connecting flange 511, which can be used for alignment with the output end of the drive component 20. The flange has a relatively large radius to facilitate alignment by moving the drive component 20.

[0083] The other of the two ends may have an axially recessed connecting hole 512 on its end face for fitting onto the input shaft of the test piece. In embodiments where there is a difference in the radii of the two ends, the connection can be achieved by providing a cylindrical washer or sleeve inside the connecting hole 512.

[0084] By providing connecting holes 512 and connecting flanges 511 at both ends of the alignment component 50, it can be conveniently and detachably connected to the input shaft coaxially. At the same time, the connecting flanges 511 can be conveniently and accurately aligned with the output shaft 21 of the drive component 20, thereby conveniently and effectively improving the coaxiality of the input shaft and the output shaft 21, and thus improving the accuracy of the test.

[0085] In some optional embodiments, the connecting assembly 30 further includes a tensioning sleeve connected between the output shaft 21 and the universal coupling; along the axial direction of the output shaft 21, the tensioning sleeve has a size of L1, the universal coupling has a size of L2, the maximum size of the alignment assembly is L3, the minimum size of the alignment assembly is L4, L3 > 10% (L1 + L2), and L4 < L2.

[0086] In embodiments where alignment component 50 is used to assist alignment, connecting component 30 may further include a tensioning sleeve for connecting the universal coupling to the input shaft of the test piece. Furthermore, since the tensioning sleeve and universal coupling need to be installed after alignment component 50 is removed, the relative size of the axial length of alignment component 50 and the length of connecting component 30 can be limited to facilitate installation.

[0087] Specifically, along the axial direction of the output shaft 21, i.e., the axial direction of the tensioning sleeve itself, the extension dimension of the tensioning sleeve is denoted as L1, and the extension dimension of the universal coupling is denoted as L2. The first part 51 and the second part 52 in the alignment assembly 50 can move relative to each other along the axial direction. The maximum length dimension of the alignment assembly 50 along its own axial direction is denoted as L3, and the minimum length is denoted as L4. Based on this, L3 can be greater than 10% (L1 + L2), and optionally L3 can be greater than 50 mm, to provide operating space for disassembling the alignment assembly 50 and to facilitate the movement of the drive assembly 20 during the alignment process. At the same time, L4 can be less than L2 to avoid interfering with the installation of the connecting assembly 30.

[0088] By ensuring that the lengths of the alignment component 50, the expansion sleeve, and the universal coupling are within the aforementioned range, the alignment component 50 can be easily installed and disassembled, and the connecting component 30 can be conveniently installed after disassembly.

[0089] The control component 40 in this embodiment can also be used to control the cleaning system and rinse the test piece before the drag test, and optionally rinse it again after the test. This method of rinsing before testing can reduce the initial damage of abrasive particles to the precision meshing pairs in the gearbox under test, and reduce the adverse effects of the drag test on the test piece.

[0090] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A drag testing device for performing drag testing on a test piece, characterized in that, include: The support assembly includes a first support assembly and a second support assembly arranged along a first direction. The first support assembly includes a first support plate and a plurality of first driving members disposed on the first support plate. The extension dimension of the first driving members in the first direction is adjustable. The second support assembly is movable relative to the first support assembly along a second direction and a third direction. The first direction, the second direction and the third direction are arranged to intersect each other. A drive assembly is disposed on the side of the second support assembly opposite to the first support assembly, and the drive assembly has an output shaft; A connecting assembly, one end of which is detachably connected to the output shaft, and the opposite end of which is used for a drive connection with the input shaft of the test piece, the connecting assembly including a universal coupling.

2. The drag testing device according to claim 1, characterized in that, The second support component includes a first sub-component and a second sub-component, wherein the first sub-component is connected between the second sub-component and the first support component; The first sub-component is movable relative to the first support component along one of the second direction and the third direction, and the second sub-component is movable relative to the first sub-component along the other of the second direction and the third direction.

3. The drag testing device according to claim 2, characterized in that, The first sub-component includes a second support plate and a second driving member connected to the second support plate; the second sub-component includes a third support plate and a third driving member connected to the third support plate. The first driving component, the second driving component, and the third driving component are all hydraulic driving components.

4. The drag testing device according to claim 3, characterized in that, The first sub-component includes two second driving members, which are respectively disposed on opposite sides of the second support plate and are arranged symmetrically. The second sub-component includes two of the third driving components, which are respectively disposed on opposite sides of the third support plate and arranged symmetrically.

5. The drag testing device according to claim 3, characterized in that, The drag testing equipment also includes a hydraulic pump station, which includes a hydraulic pump assembly, oil pipes, and a quick connector. The oil pipes connect the hydraulic pump assembly and the quick connector, and the quick connector can be plugged into any one of the first drive component, the second drive component, and the third drive component.

6. The drag testing device according to claim 1, characterized in that, The drag testing device further includes a detection component and a control component, wherein the control component is communicatively connected to the detection component, the support component, and the drive component, respectively. The detection assembly includes a torque sensor, a temperature sensor, a tilt sensor, a pressure sensor, and a vibration sensor. The torque sensor is disposed on the connecting assembly, the pressure sensor and the tilt sensor are disposed on the support assembly, and the vibration sensor and at least a portion of the temperature sensor can be disposed on the test piece.

7. The drag testing device according to claim 6, characterized in that, The drag testing equipment also includes an auxiliary lubrication system and an oil pressure sensor. The oil pressure sensor is communicatively connected to the control component. The auxiliary lubrication system is used to lubricate the test piece, and the oil pressure sensor is used to detect the oil pressure in the auxiliary lubrication system.

8. The drag testing device according to claim 1, characterized in that, The drag testing device further includes an alignment component, which includes a first part and a second part. The first part and the second part are movably connected, and the second part is capable of moving relative to the first part along the axial direction of the alignment component. The alignment component can be detachably connected to the input shaft of the test piece and is coaxially arranged with the input shaft of the test piece.

9. The drag testing device according to claim 8, characterized in that, The alignment component has a first end and a second end that are arranged opposite to each other along its own axial direction. One of the first end and the second end is provided with a connecting flange, and the other end is provided with a connecting hole recessed along the axial direction.

10. The drag testing device according to claim 8, characterized in that, The connecting assembly further includes a tensioning sleeve, which is connected between the output shaft and the universal coupling; Along the axial direction of the output shaft, the size of the tensioning sleeve is L1, the size of the universal coupling is L2, the maximum size of the alignment component is L3, the minimum size of the alignment component is L4, L3 > 10% (L1 + L2), and L4 < L2.

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