Torque loader and closed power flow gearbox testing device

Abstract

The present invention provides a torque loader and a closed power flow type gearbox testing device, wherein the torque loader includes: a first turntable, for connecting to an external first gearbox to be tested; a second turntable, for connecting to an external second gearbox to be tested; gear teeth are provided on the circumference of the second turntable, and the second turntable is located on one side of the first turntable; a worm is rotatably mounted on the first turntable and meshes with the gear teeth on the second turntable, the rotation of the worm drives the second turntable to rotate, and can self-lock with the second turntable; wherein the axis of the worm is set at an angle to the axis of the second turntable. The present application uses the meshing self-locking of the worm and the gear teeth to enable the torque loader to self-lock after loading the torque, without the need for other auxiliary devices, effectively simplifying the structure of the torque loader and reducing its cost; and the torque loading process is safer; the torque loading direction adjustment operation is simple; and the operation is simple and quick during the entire torque loading adjustment process.

Description

Technical Field

[0001] This invention relates to the field of mechanical experimental equipment, and more particularly to a torque loader and a closed power flow gearbox testing device. Background Technology

[0002] Loading tests are a crucial method for performance verification in gear and gearbox design and manufacturing. The torque loader device is one of the key components in a closed-loop power flow gearbox testing setup. Compared to open-loop power flow gearbox testing setups, closed-loop power flow gearbox testing setups are increasingly valued and adopted due to their advantages such as lower power consumption, high efficiency and energy saving, and lower experimental costs.

[0003] Currently, torque loader devices on the market are polarized. For example, there are relatively simple mechanical torque loaders such as "threaded" or "ratchet-mounted" types, but their torque adjustment range is small, the torque adjustment is segmented, and they cannot be precisely adjusted to any arbitrary torque value; moreover, they are complex to operate. On the other hand, there are torque loading devices with precise control and accurate torque adjustment, such as "planetary gear transmission mechanisms and servo motors and control systems" and "hydraulic loading and servo control systems," but their structures are overly complex, their prices are extremely high, and their operation is complicated and inconvenient. Therefore, this limits the widespread application of closed power flow gearbox test benches.

[0004] In addition, some simple mechanical torque loaders can only load torque in one direction, which limits their applicability to various working conditions and their application range. Of course, there are also mechanical torque loaders that can load torque in both the forward and reverse directions. However, when adjusting the loading direction, additional auxiliary structures are required to complete the adjustment, which is complex and costly. Summary of the Invention

[0005] In view of this, and to address the aforementioned technical problems, it is necessary to provide a torque loader that is simple in structure, has precise torque adjustment, and is easy to operate, as well as a closed power flow gearbox testing device with the torque loader.

[0006] This invention provides a torque loader, the torque loader comprising:

[0007] The first turntable is used to connect to the external first gearbox to be tested;

[0008] The second turntable is used to connect to the external second gearbox to be tested; the second turntable has teeth arranged around its circumference, and the second turntable is located on one side of the first turntable;

[0009] A worm gear is rotatably mounted on the first turntable and meshes with gear teeth on the second turntable. The rotation of the worm gear drives the second turntable to rotate and is capable of self-locking with the second turntable. The axis of the worm gear is angled relative to the axis of the second turntable.

[0010] In one embodiment, the first turntable and the second turntable are coaxially arranged; the axis of the worm gear is perpendicular to the axis of the first turntable.

[0011] In one embodiment, the torque loader further includes a limiting component; when the torque loader applies torque to a preset torque value, the limiting component is connected and secured to the first turntable and the second turntable.

[0012] In one embodiment, the first turntable is provided with a first limiting hole extending along the axial direction; the second turntable is provided with a second limiting hole extending along the axial direction; the limiting component is a fastening component, which passes through the first limiting hole and the second limiting hole to connect and fasten the first turntable and the second turntable.

[0013] In one embodiment, the second limiting hole is an elongated arc-shaped hole, and the center of the arc of the elongated arc-shaped hole coincides with the axis of the second turntable.

[0014] In one embodiment, the number of elongated arc-shaped holes is multiple, and the multiple elongated arc-shaped holes are arranged circumferentially around the axis of the second turntable.

[0015] In one embodiment, the first turntable is provided with a mounting groove extending along its axial direction, the second turntable is located within the mounting groove, and the worm is at least partially located within the mounting groove so that the worm meshes with the gear teeth of the second turntable.

[0016] In one embodiment, a positioning component is provided between the first turntable and the second turntable. The positioning component is used to position the first turntable and the second turntable and restrict the second turntable from moving radially along the first turntable.

[0017] The present invention also provides a closed power flow gearbox testing device, the closed power flow gearbox testing device including a torque loader, wherein the torque loader is any of the torque loaders described above.

[0018] In one embodiment, the closed-loop power flow gearbox testing device further includes a first sensor, a second sensor, multiple sets of connecting components, and a drive motor; the input shaft of the first gearbox is connected to the first turntable via the connecting components, the second turntable is connected to the input shaft of the second gearbox via the connecting components, and the output shafts of the first gearbox and the second gearbox are connected via the connecting components to form a closed-loop mechanical power flow; wherein, the first gearbox and the second gearbox are the gearbox under test and the auxiliary gearbox under test, respectively; the drive motor is connected to the auxiliary gearbox under test to supplement the power lost in the closed-loop mechanical power flow; the first sensor is used to measure the torque value of the load on the input shaft of the gearbox under test and the rotational speed of the input shaft; the second sensor is used to monitor the torque value and rotational speed of the load between the output shafts of the gearbox under test and the auxiliary gearbox under test.

[0019] The torque loader and closed power flow gearbox testing device provided by this invention have the following advantages compared with the prior art:

[0020] First, the torque loader provided in this application generates torque on the gear meshing surface within the gearbox under test through the relative rotation between the first and second turntables. When the desired torque value is reached, the worm gear and the teeth of the second turntable engage and lock, preventing the first and second turntables from rebounding. This allows the torque loader to lock itself after applying torque, eliminating the need for other auxiliary devices and effectively simplifying its structure, thus reducing its cost. Second, the self-locking engagement between the worm gear and the teeth of the second turntable prevents the first turntable from reversing or rebounding relative to the second turntable when the torque adjustment is completed, avoiding injury to the adjustment personnel and enhancing safety. Furthermore, when applying torque, simply rotating the worm gear, through the meshing transmission between the worm gear and the teeth, drives the second turntable to rotate relative to the first turntable, thereby generating torque. The torque loading operation is simple and improves work efficiency. The first turntable can rotate at any angle relative to the second turntable, allowing for precise loading of any torque value. Once the desired torque value is reached, the worm gear stops rotating, and the worm and gear teeth self-lock, completing the torque loading process. The operation is simple. Furthermore, the relative rotation direction of the first and second turntables is arbitrary; that is, the direction of the torque loaded by the torque loader can be changed by altering the direction of the meshing transmission between the worm and gear teeth. Changing the torque loading direction is simple and requires no additional auxiliary structures, effectively reducing the cost of the torque loader. In summary, the torque loader provided in this application has a simple structure, significantly reduced cost, and is easy and convenient to operate, greatly improving work efficiency during testing.

[0021] In addition, the present invention also provides a closed power flow gearbox testing device. In this device, the torque and shaft speed of the load on the gearbox under test are directly detected by a first sensor. The input power and output power of the gearbox under test can be directly monitored and displayed, thereby accurately testing parameters such as the transmission efficiency of the gearbox under test. Compared with the prior art, the testing accuracy is significantly improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the torque loader in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional view of the torque loader in the image;

[0024] Figure 3 This is a schematic diagram of a closed power flow gearbox testing device in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the power flow within a closed system during testing using a closed power flow gearbox testing device according to one embodiment of the present invention.

[0026] Description of main component symbols

[0027] 100. Enclosed power flow gearbox testing device; 10. Torque loader; 11. First turntable; 111. Mounting slot; 12. Connecting lug; 13. First limiting hole; 14. Second turntable; 15. Second limiting hole; 16. Gear tooth; 17. Worm gear; 18. Limiting assembly; 19. Positioning assembly; 191. Protrusion; 192. Positioning groove; 20. First sensor; 30. Second sensor; 40. Connecting assembly; 50. Drive device; 60. Support platform; 200. First gearbox; 300. Second gearbox.

[0028] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This invention provides a torque loader. When performing performance testing on gears or gearboxes, the torque loader is placed between the gearbox under test and the auxiliary gearbox. The torque loader applies torque to the closed system consisting of the gearbox under test and the auxiliary gearbox, thereby testing the performance of the gearbox under test under the corresponding torque conditions.

[0033] See Figure 1 and Figure 2 The torque loader 10 provided by the present invention includes a first turntable 11, a second turntable 14, and a worm gear 17. The first turntable 11 is connected to an external first gearbox 200 to be tested. The second turntable 14 is located on one side of the first turntable 11 and is connected to an external second gearbox 300 to be tested. In addition, the second turntable 14 is provided with gear teeth 16 in the circumferential direction. The worm gear 17 is rotatably mounted on the first turntable 11 and meshes with the gear teeth 16 on the second turntable 14. The rotation of the worm gear 17 drives the second turntable 14 to rotate and can self-lock with the gear teeth 16 on the second turntable 14. The axis of the worm gear 17 is set at an angle to the axis of the second turntable 14.

[0034] The torque loading process is as follows: the gear teeth 16 of the second turntable 14 mesh with the worm 17, so that the rotation of the worm 17 applies a force to the second turntable 14, thereby driving the second turntable 14 to rotate relative to the first turntable 11. When the second turntable 14 rotates, it applies torque to the second gearbox 300. Correspondingly, the second turntable 14 applies a reaction force to the worm 17. When the axis of the worm 17 is set at an angle to the axis of the second turntable 14, the worm 17 applies a circumferential torque to the first turntable 11, and then the first turntable 11 applies torque to the first gearbox 200. Thus, the closed system formed by the first gearbox 200 and the second gearbox 300 has mutually balanced internal forces and torques, which act between the meshing tooth surfaces in the gearbox.

[0035] The torque loader 10 provided in this application has several significant advantages over the prior art:

[0036] First, the torque loaded on the gearbox under test is generated by the relative torsion between the first turntable 11 and the second turntable 14. When the required torque value is adjusted, the worm gear 17 and the gear teeth 16 of the second turntable 14 mesh and lock themselves, thereby preventing the first turntable 11 and the second turntable 14 from rebounding back. This allows the torque loader 10 to lock itself after loading the torque, without the need for other auxiliary fastening devices to fasten and restrict the relative rotation of the first turntable 11 and the second turntable 14. This effectively simplifies the structure of the torque loader 10 and reduces its cost.

[0037] Second, the first turntable 11 and the second turntable 14 are self-locking. When the adjustment torque is completed, the first turntable 11 cannot reverse or rebound relative to the second turntable 14, which avoids injury to the adjustment personnel and makes it safer to use.

[0038] Third, when applying torque, simply rotate the worm 17. Through the meshing transmission between the worm 17 and the gear 16, the second turntable 14 is driven to twist relative to the first turntable 11, thereby generating torque. The first turntable 11 can twist at any angle relative to the second turntable 14, thus allowing for the precise application of any torque value. When the required torque value is reached, stop rotating the worm 17. At this point, the worm 17 and the gear 16 self-lock, completing the torque loading process. The operation is simple.

[0039] Fourth, the torque loading method achieves relative rotation of the first turntable 11 and the second turntable 14 through the meshing transmission of the gear 16 and the worm 17. This allows for adjustment of the torque loading direction, enabling bidirectional torque loading and thus making it suitable for testing under various working conditions, significantly expanding its application range. In essence, when the worm 17 rotates clockwise, the helical teeth on the worm 17 mesh with the gear 16, driving the first turntable 11 and the second turntable 14 to rotate relative to each other, and the torque loader 10 loads a positive torque. When a reverse torque is required, the worm 17 is rotated counterclockwise, disengaging the self-locking mechanism between the worm 17 and the gear 16. After disengaging, the worm 17 continues to rotate counterclockwise, re-engaging with the gear 16 and driving the first turntable 11 and the second turntable 14 to rotate relative to each other, and the torque loader 10 loads a reverse torque. This achieves adjustment and change of the torque loading direction, with a simple adjustment method and convenient operation. Furthermore, it eliminates the need for additional structures, effectively reducing the cost of the torque loader 10.

[0040] In summary, the torque loader 10 provided in this application has a simple structure, significantly reduced cost, and is easy and convenient to operate, which helps to improve work efficiency during testing and experimentation.

[0041] It is understandable that the second turntable 14 is provided with gear teeth 16 in the circumferential direction. The second turntable 14 and the gear teeth can be integrally formed, for example, the second turntable 14 is a worm gear; or it can be formed by connecting and combining multiple structures to form a second turntable 14 with gear teeth 16, for example, a second turntable 14 formed by connecting a gear ring and a gear core.

[0042] Preferably, the transmission ratio between the second turntable 14 and the worm gear is 1:20 or higher, making the adjustment operation less labor-intensive; in other embodiments, the transmission ratio between the second turntable 14 and the worm gear is not limited, and the transmission ratio is selected according to the specific structural size.

[0043] See Figure 1 and Figure 2 The first turntable 11 is provided with a connecting lug 12, and the worm gear 17 is rotatably connected to the first turntable 11 through the connecting lug 12. Of course, in other embodiments, the way the worm gear is rotatably mounted on the first turntable 11 is not limited to what is described above or shown in the figure.

[0044] In one embodiment, preferably, see [reference] Figure 1 and Figure 2The first turntable 11 and the second turntable 14 are coaxially arranged, and the axis of the worm gear 17 is perpendicular to the axis of the first turntable 11. The worm gear 17 needs to mesh with the gear teeth 16 to transmit power; therefore, the axis of the worm gear 17 is perpendicular to the axis of the second turntable 14. When the first turntable 11 and the second turntable 14 are coaxial, the axis of the worm gear 17 is perpendicular to the axis of the first turntable 11. During transmission, when the second turntable 14 applies a reaction force (reverse torque) to the worm gear 17, and the axis of the worm gear 17 is perpendicular to the axis of the first turntable 11, the worm gear 17 can transmit this reaction force to the first turntable 11. That is, the worm gear 17 applies a reverse torque along its circumference to the first turntable 11, and the first turntable 11 can then apply an equivalent reverse torque to the first gearbox 200. Of course, in other embodiments, the first turntable 11 is not necessarily coaxial with the second turntable 14; for example, the axis of the first turntable 11 may be parallel to or intersect the axis of the second turntable 14. Correspondingly, the axis of the worm gear 17 and the axis of the first turntable 11 are not necessarily perpendicular. For example, the included angle between the two axes can be less than or greater than 90°.

[0045] Please continue reading. Figure 1 and Figure 2 The torque loader 10 also includes a limiting component 18. When the torque loader 10 loads the torque to a preset torque value, that is, when the second turntable 14 rotates at a set angle relative to the first turntable 11, the limiting component 18 is used to connect and fasten the first turntable 11 and the second turntable 14. At this time, the limiting component 18 transmits the load torque and power, while the worm gear 17 and the gear teeth 16 do not participate in transmitting the load torque and power, thus avoiding wear and ensuring adjustment accuracy. In other words, after the torque loading is completed, the worm gear 17 and the gear teeth 16 do not need to transmit torque. The worm gear 17 only needs to drive the second turntable 14 to rotate to adjust the loaded torque to reach the preset value. After reaching the preset value, the first turntable 11 and the second turntable 14 are connected through the limiting component 18 to transmit the torque between the second turntable 14. Therefore, the service life of the worm gear 17 and the gear teeth 16 can be guaranteed. If the torque is still transmitted through the worm gear 17 and the gear teeth 16 after the torque loading is completed, it may cause relative movement between the worm gear 17 and the gear teeth 16, thereby changing the magnitude of the original loaded torque value. This affects the magnitude of the loaded torque during the test and the accuracy of the torque loading. That is, the torque is transmitted through the limiting component 18, rather than through the worm gear and the gear teeth 16, which ensures the accuracy of the torque loading.

[0046] As can be seen from the above, the tension limiting component 18, the forward and reverse second turntable 14, and the worm gear 17 can be used to adjust the magnitude of the loading torque and the forward and reverse loading direction within the design range, making the operation simple and convenient.

[0047] Please see Figure 1 The first turntable 11 is provided with a first limiting hole 13 extending axially; the second turntable 14 is provided with a second limiting hole 15 extending axially; the limiting component 18 is a fastening component, which passes through the first limiting hole 13 and the second limiting hole 15. Tightening the fastening component fastens the first turntable 11 and the second turntable 14 together, and transmits the torque between the second turntable 14 and the first turntable 11 through the fastening component. Of course, in other embodiments, the specific structure of the limiting component 18 is not limited to the above description. For example, it can also be a clamp, which can also clamp and fix the first turntable 11 and the second turntable 14 and transmit torque.

[0048] The fastening components are bolts and nuts, which connect the first turntable 11 and the second turntable 14. Tightening the bolts locks the first turntable 11 and the second turntable 14 in place and transmits the torque between them. Of course, the fastening components can also be screws and nuts.

[0049] As a preferred option, see [reference] Figure 1 The second limiting hole 15 is an elongated arc-shaped hole, with the center of the arc coinciding with the axis of the second turntable 14. With this configuration, after the second turntable 14 rotates at any angle relative to the first turntable 11, the limiting component 18 passes through the second limiting hole 15 and the first limiting hole 13 to connect and lock the first turntable 11 and the second turntable 14. When the second limiting hole 15 is an elongated arc, the position of the limiting component 18 passing through the second limiting hole 15 is not affected by the second limiting hole 15, and the limiting component 18 can be fastened at any position within the elongated arc hole. This allows the second turntable 14 to rotate at any angle relative to the first turntable 11 without restriction, achieving smooth adjustment. Compared to existing loaders that apply torque in segments by dividing a range, the torque loader 10 provided in this application can achieve smooth adjustment within the designed loading range and can apply torque of any value, thus making the adjustment more precise. Of course, in other embodiments, the specific shape of the second limiting hole is not limited to that described above. For example, the limiting hole can also be circular, with the center of the circle being the axis of the second turntable 14.

[0050] In other embodiments, the first limiting hole 13 may also be an arc-shaped hole.

[0051] For better options, see [link / reference] Figure 1Multiple elongated arc-shaped holes are provided, arranged circumferentially around the axis of the second turntable 14. This increases the space for the limiting component 18 to be fastened, in other words, it increases the range of rotation of the second turntable 14 relative to the first turntable 11, i.e., it increases the torque adjustment range. For example, when the multiple elongated arc-shaped holes are arranged in a complete circle around the axis of the second turntable 14, the first limiting hole 13 can correspond to the hole position of the second limiting hole 15 when any torque value is applied, which facilitates the passing of the limiting component 18 through and fastening the connection between the first turntable 11 and the second turntable 14, making operation convenient. If the second limiting hole 15 is a complete circle, then during fastening, the second turntable 14 needs to be rotated until the first limiting hole 13 corresponds to the empty hole position of the second limiting hole 15, so that the limiting component 18 can pass through the first limiting hole 13 and the second limiting hole 15 to fasten the connection between the first turntable 11 and the second turntable 14.

[0052] See Figure 2 The first turntable 11 has a mounting groove 111 extending axially therein. The second turntable 14 is located within the mounting groove 111, and the worm gear 17 is at least partially located within the mounting groove 111, so that the worm gear 17 meshes with the gear teeth 16 of the second turntable 14. By providing the mounting groove 111, the second turntable 14 is located within the mounting groove 111, which has the advantage of protecting the second turntable 14 and the gear teeth 16, preventing the gear teeth of the second turntable 14 from being touched by foreign objects when applying torque, avoiding affecting the smoothness of torque loading, and extending the service life of the second turntable 14 and the gear teeth 16.

[0053] A positioning component 19 is provided between the first turntable 11 and the second turntable 14. The positioning component 19 is used to position the first turntable 11 and the second turntable 14 and restrict the second turntable 14 from moving radially along the first turntable 11, ensuring the coaxiality of the first turntable 11 and the second turntable. At the same time, it avoids the second turntable 14 from moving relative to the first turntable 11 during the application process, which would cause changes in the loaded torque value and affect the test results.

[0054] In this application, the specific structure of the positioning component 19 is not limited. For example, the positioning component 19 can be a protrusion 191 and a positioning groove 192, with the protrusion 191 extending into the positioning groove 192 to achieve positioning and radial limiting. For example, see [reference needed]. Figure 2 The positioning component 19 includes a protrusion 191 disposed on one side of the first turntable 11 facing the second turntable 14, and a positioning groove 192 disposed on the second turntable 14 corresponding to the protrusion 191. Of course, in other embodiments, the protrusion 191 may also be disposed on one side of the second turntable 14 facing the first turntable 11, and the positioning groove 192 may be disposed on one side of the first turntable 11 facing the second turntable 14.

[0055] Closed-loop power flow gearbox test benches are increasingly valued and adopted due to their advantages over open-loop power flow gearbox test benches, such as lower power consumption, high efficiency and energy saving, and lower experimental costs. However, currently available closed-loop power flow test benches on the market are quite complex in terms of structure and control design.

[0056] Therefore, this application also provides a closed power flow gearbox testing device 100, including a torque loader 10, which can be any of the torque loaders described above. By using the torque loader 10 described above, the structure of the closed power flow gearbox testing device 100 is simplified, its cost is significantly reduced, and power consumption is reduced, achieving high efficiency and energy saving; it is also suitable for various application scenarios and various testing conditions, and has great promotional application value, with green energy saving and environmental protection economic and social benefits.

[0057] In this application, the closed power flow gearbox testing device 100 further includes a first sensor 20, a second sensor 30, multiple sets of connecting components 40, and a drive device 50; the input shaft of the first gearbox 200 is connected to the first turntable 11 via the connecting components 40, the second turntable 14 is connected to the input shaft of the second gearbox 300 via the connecting components 40, the output shafts of the first gearbox 200 and the second gearbox 300 are connected via the connecting components 40, and the transmission ratio and other parameters of the two gearboxes are consistent, so that the rotational speed of the input shafts of the two gearboxes is consistent, and / or the rotational speed of the output shafts of the two gearboxes is consistent; the two gearboxes form a closed transmission system with exactly opposite directions; a preset internal power (i.e., closed power) is loaded in this transmission system. A closed-loop mechanical power flow test device 100 is constructed, wherein the first gearbox 200 and the second gearbox 300 serve as the gearbox under test and the auxiliary gearbox respectively; the drive unit 50 is connected to the auxiliary gearbox to supplement the power lost in the closed-loop mechanical power flow; the first sensor 20 is used to monitor the torque value of the load on the input shaft of the gearbox under test and the rotational speed of the input shaft; the second sensor 30 is used to monitor the torque value of the load between the output shafts of the gearbox under test and the auxiliary gearbox, as well as the rotational speed of their output shafts. This configuration significantly simplifies the structure of the closed-loop power flow gearbox test device 100, reduces device cost, and facilitates widespread application.

[0058] The connecting component 40 is a coupling, but it can also be other connecting structures used for shaft-to-shaft connection.

[0059] Preferably, the connecting component between the input shaft of the second gearbox 300 and the second turntable is a flexible torsion bar, which can better transmit the torque applied by the second turntable to the input shaft. Of course, other connecting structures can also be used.

[0060] The principle of the closed-loop power flow gearbox testing device 100 for testing the performance of various gearbox devices is as follows: The first gearbox 200 and the second gearbox 300 to be tested are connected in a closed loop by a torque loader in a drag connection manner; the torque applied by the torque loader 10 forms a balanced internal torque between the two gearboxes, and the test loading is achieved based on the torque balance. During the test, only the losses due to friction and other factors need to be compensated. This power loss is only 1%-15% of the closed-loop power value of the system, and the specific amount depends on the efficiency and other performance of the gearbox being tested. Therefore, the energy consumption is very small, and the cooling device is omitted, making the structure more simplified.

[0061] It is worth noting that the first gearbox 200 and the second gearbox 300 being the gearbox under test and the auxiliary gearbox under test respectively means that when the first gearbox 200 is the gearbox under test, the second gearbox 300 is the auxiliary gearbox under test; or when the second gearbox 300 is the gearbox under test, the first gearbox 200 is the auxiliary gearbox under test.

[0062] The following is a brief description of the working principle and process of the closed power flow gearbox testing device 100, assuming that the second gearbox 300 is the gearbox under test and the first gearbox 200 is the auxiliary gearbox under test:

[0063] like Figure 3 As shown, after the installation and debugging of the closed power flow gearbox test device 100 are completed, the torque loader 10 is first adjusted to apply a preset torque value T1 between the input shafts of the first gearbox 200 and the second gearbox 300. The torque value T1 can be read by the first sensor 20. When the torque value T1 is applied, the worm gear on the first turntable 11 drives the second turntable 14 to rotate until the applied torque value reaches T1. The second turntable 14 transmits the torque value T1 to the input shaft of the second gearbox 300. At the same time, the force and torque between the second turntable 14 and the first turntable 11 interact, causing the first turntable 11 to rotate and transmit the same torque value T1 to the input shaft of the first gearbox 200. That is, the magnitude of the torque between the input shafts of the first gearbox 200 and the second gearbox 300 is T1.

[0064] The torque is transmitted from the input shaft of the first gearbox 200 to its output shaft, and simultaneously from the input shaft of the second gearbox 300 to its output shaft. The magnitude of the torque between the output shafts of the first gearbox 200 and the second gearbox 300 is T2, and the torque value T2 can be read by the second sensor 30. Thus, the torque is balanced within the closed-loop transmission system formed by the first gearbox 200 and the second gearbox 300.

[0065] Next, the drive unit 50 is started; wherein the drive unit is a drive motor, and the drive motor is connected to the first gearbox 200.

[0066] When starting the drive motor to drive the input shaft of the first gearbox 200, pay attention to the direction of the drive motor rotation. The direction of the drive motor rotation determines the direction of the internal power flow in the closed-loop transmission system. Make the torque loaded by the drive motor and the torque loaded by the torque loader 10 superimpose in the same direction or in opposite directions. After the system is running normally, obtain the test data and calculate the operating efficiency of the gearbox under test.

[0067] The method for testing the forward operating efficiency of the gearbox under test is as follows: Start the drive motor to rotate forward, so that the test power flow is transmitted from the input shaft of the second gearbox 300 to the output shaft, and measure the operating efficiency η of the second gearbox 300. At this time, the internal power flow in the closed-loop transmission system is counterclockwise. The power flow direction in the system is: P1 is input through the input shaft of the second gearbox 300 and output through the output shaft P2; then it is input through the output shaft of the first gearbox 200 and output through the input shaft of the first gearbox 200 again. Let the output power be P1'. This power is balanced with P1 after being supplemented by the drive motor, and the system can maintain continuous cyclic operation test. Let the power supplemented by the drive motor be P0, then the following relationship exists: P1 = P1' + P0;

[0068] The internal power is input through the input shaft of the second gearbox 300, and the loss output through the output shaft is P1-P2;

[0069] The internal power is input through the output shaft of the first gearbox 200, and the loss output through the input shaft is P2 - P1'.

[0070] Total system loss = P0 = (P1 - P2) + (P2 - P1') = P1 - P1';

[0071] The forward operating efficiency of the second gearbox 300 is η=P2 / P1=(T2*n2) / (T1*n1).

[0072] P1 and P2 can be calculated using the formula P = T * n. As can be seen from the above, T1 and n1 can be directly read from the first sensor 20, and T2 and n2 can be directly read from the second sensor 30. Therefore, P1 and P2 can be calculated accurately, while P0 and P1' cannot be directly read or calculated accurately.

[0073] The method for testing the reverse operation efficiency of the gearbox under test is as follows: Change the direction of torque loading and the direction of motor rotation, and test the reverse operation efficiency η of the second gearbox 300 when the power flow is transmitted from the output shaft to the input shaft. At this time, the direction of power flow within the system is as follows: Figure 4The opposite is true. The direction of power flow within the system is as follows: power flow P2' enters from the input shaft of the first gearbox 200, exits through the output shaft of the first gearbox 200, and then P2 is input through the output shaft of the second gearbox 300, and then outputs through the input shaft of the second gearbox 300. This power flow P1 merges with the power P0 supplemented by the drive motor and then enters P1' from the input end of the first gearbox 200, thus realizing a cycle. The above reverse cycle process has the following relationship: P2' = P1 + P0;

[0074] The input loss through the output shaft of the second gearbox 300 is P2 - P1;

[0075] The input loss through the input terminal of the first gearbox 200 is P2' - P2;

[0076] Total system loss = P0 = (P2 - P1) + (P2' - P2) = P2' - P1;

[0077] The reverse operation efficiency of the second gearbox 300 is η=P1 / P2=(T1*n1) / (T2*n2).

[0078] P1 and P2 can be calculated using the formula P = T * n. As mentioned above, T1 and n1 can be directly read from the first sensor 20, and T2 and n2 can be directly read from the second sensor 30. Therefore, P1 and P2 can be accurately calculated, allowing for the direct and accurate testing of the reverse operation efficiency of the second gearbox 300. However, P0 and P2' cannot be directly read or accurately calculated.

[0079] In summary, in this application, the torque T and shaft speed n of the load on the gearbox under test are directly detected by the first sensor 20 and the second sensor 30. The input power and output power of the gearbox under test can be directly monitored and displayed without the need for calculation or estimation through intermediate steps, thus reducing errors. As a result, the transmission efficiency and other parameters of the gearbox under test can be accurately tested. Compared with the prior art, the test accuracy is significantly improved.

[0080] In summary, by employing the torque loader 10 described above, the closed power flow gearbox testing device 100 provided in this application has the following advantages:

[0081] First, the torque loader 10 has a simple structure and is easy to operate. By adopting the torque loader 10 of this application, the structure of the closed power flow gearbox test device 100 can be simplified, its cost can be reduced significantly, and its operation can be simple, thereby improving the work efficiency during the test process. At the same time, the power consumption of the closed power flow gearbox test device 100 is reduced, achieving high efficiency and energy saving. It has great value for promotion and application and has green, energy-saving and environmentally friendly economic and social benefits.

[0082] Secondly, the torque loader 10 can achieve bidirectional torque loading, thus making it suitable for testing under various working conditions. For example, it is suitable for conditions where the torque loader 10 rotates forward and the drive motor rotates forward, the torque loader 10 rotates forward and the drive motor rotates in reverse, the torque loader 10 rotates in reverse and the drive motor rotates forward, and the torque loader 10 rotates in reverse and the drive motor rotates in reverse. This allows for functional testing of the gearbox under test under various conditions, providing a comprehensive understanding of its performance. Furthermore, the torque loader 10 is suitable for testing various types of gearboxes. For example, it is suitable for gearboxes with a single working face, where only one side of the gear teeth can mesh and receive force, and also for gearboxes with two working faces, where both sides of the gear teeth can mesh and receive force. This allows for single-sided meshing motion testing and / or double-sided meshing motion testing of the gearbox. That is, the torque loader 10 can apply positive torque to the gear or apply reverse torque; as described above, the closed power flow gearbox testing device 100 provided in this application has a wider range of applications and is suitable for testing under various working conditions, and the testing of the gearbox under test is more comprehensive.

[0083] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A torque loader for use in a closed power flow gearbox testing device, characterized in that, The torque loader includes: The first turntable is used to connect to the external first gearbox to be tested; The second turntable is used to connect to the external second gearbox to be tested; the second turntable has teeth arranged in the circumferential direction, and the second turntable is located on one side of the first turntable; A worm gear is rotatably mounted on the first turntable and meshes with the gear teeth on the second turntable. The rotation of the worm gear drives the second turntable to rotate relative to the first turntable and can mesh with the gear teeth on the second turntable to achieve self-locking, so as to adjust to the required torque value. The axis of the worm gear is set at an angle to the axis of the second turntable; The torque loader further includes a limiting component for transmitting torque; the first turntable is provided with a first limiting hole extending along the axial direction; the second turntable is provided with a second limiting hole extending along the axial direction; the limiting component is a fastening component, which passes through the first limiting hole and the second limiting hole to connect and fasten the first turntable and the second turntable. The second limiting hole is an elongated arc-shaped hole, and the center of the arc of the elongated arc-shaped hole coincides with the axis of the second turntable; A positioning component is provided between the first turntable and the second turntable. The positioning component is used to position the first turntable and the second turntable and restrict the second turntable from moving radially along the first turntable.

2. The torque loader according to claim 1, characterized in that, The first turntable and the second turntable are coaxially arranged; the axis of the worm gear is perpendicular to the axis of the first turntable.

3. The torque loader according to claim 1, characterized in that, When the torque loader applies torque to a preset torque value, the limiting component is connected and secured to the first turntable and the second turntable.

4. The torque loader according to claim 1, characterized in that, The number of elongated arc-shaped holes is multiple, and the multiple elongated arc-shaped holes are arranged circumferentially around the axis of the second turntable.

5. The torque loader according to claim 1, characterized in that, The first turntable is provided with a mounting groove extending along its axial direction, the second turntable is located in the mounting groove, and the worm is at least partially located in the mounting groove so that the worm is engaged with the gear teeth of the second turntable.

6. A closed-loop power flow gearbox testing device, characterized in that, Includes a torque loader, wherein the torque loader is the torque loader as described in any one of claims 1-5.

7. The closed power flow gearbox testing device according to claim 6, characterized in that, The closed power flow gearbox testing device also includes a first sensor, a second sensor, multiple sets of connecting components, and a drive device; The input shaft of the first gearbox is connected to the first turntable via the connecting assembly, the second turntable is connected to the input shaft of the second gearbox via the connecting assembly, and the output shafts of the first gearbox and the second gearbox are connected via the connecting assembly, forming a closed loop of mechanical power flow; Wherein, the first gearbox and the second gearbox are the gearbox under test and the auxiliary gearbox under test, respectively; the drive device is connected to the auxiliary gearbox under test and is used to supplement the power lost in the closed loop of the mechanical power flow; the first sensor is used to monitor the torque value of the load on the input shaft of the gearbox under test and the rotational speed of the input shaft; the second sensor is used to monitor the torque value and rotational speed of the load between the output shafts of the gearbox under test and the auxiliary gearbox under test.

Images