Dynamic balancing device

Abstract

The utility model discloses a dynamic balancing device, which relates to the technical field of generators and comprises a first extension shaft used for connecting a high-speed testing machine; the first extension shaft and the second extension shaft are used for being correspondingly connected with the two ends of the exciter rotor respectively; the transition disc is provided with at least two spigots along the axial direction of the transition disc, one spigots is connected with the first extension shaft or the second extension shaft, and the other spigots are used for being connected with the corresponding end of the exciter rotor; and the at least three groups of fasteners are used for connecting the exciter rotor between the first extension shaft and the second extension shaft through the transition disc. According to the dynamic balance device, the actual high-speed operation condition of the exciter rotor can be simulated, the correction accuracy is improved, and the service life of the exciter rotor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and more specifically, to a dynamic balancing device. Background Technology

[0002] The exciter for a generator is often part of the generator's weight. After prolonged use, the exciter rotor is prone to failures such as runaway and rotor rubbing, requiring timely replacement. The replacement exciter rotor needs to undergo a high-speed dynamic balancing test beforehand to avoid repeated dynamic balancing at the generator's operating site.

[0003] In related technologies, the dynamic balancing test of the exciter rotor is carried out by supporting it with ball bearing components and performing a two-sided balancing test. This method only supports low-speed operation tests and cannot simulate the actual high-speed operation conditions of the exciter rotor, resulting in residual imbalance in the calibrated rotor at high speed.

[0004] In summary, how to provide a device that can simulate the actual high-speed operating conditions of an exciter rotor is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a dynamic balancing device that can simulate the actual high-speed operating conditions of the exciter rotor, improve the accuracy of the calibration, and extend the service life of the exciter rotor.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dynamic balancing device, comprising:

[0008] The first extension shaft is used to connect to the high-speed testing machine;

[0009] The second extension shaft, the first extension shaft, and the second extension shaft are used to connect to the two ends of the exciter rotor respectively;

[0010] At least one transition disk has at least two stops along its axial direction, one of which is connected to the first extension shaft or the second extension shaft, and the other is used to connect to the corresponding end of the exciter rotor.

[0011] At least three sets of fasteners are used to connect the exciter rotor to the first extension shaft and the second extension shaft via the transition plate.

[0012] Preferably, a first stop and a second stop are provided along the axial direction of the transition disc. The first stop is connected to the first engagement part of the first extension shaft, the second stop is used to connect to the second engagement part of the first end of the exciter rotor, and the second extension shaft is connected to the third engagement part of the second end of the exciter rotor.

[0013] Preferably, either the first stop or the second stop is a concave stop, and the other is a convex stop, with the first stop positioned away from the axis of the transition disc relative to the second stop.

[0014] Preferably, the transition plate has multiple stepped holes at its edge, and the fasteners are installed in the stepped holes.

[0015] Preferably, the first extension shaft is radially provided with multiple turns of first fastening holes, at least one turn of the first fastening holes being used for the first end of the exciter rotor corresponding to an outer diameter.

[0016] Preferably, the second extension shaft is radially provided with multiple turns of second fastening holes, at least one turn of the second fastening holes being for the second end of the exciter rotor corresponding to an outer diameter.

[0017] Preferably, the second extension shaft is provided with a third stop for connecting with the third engaging portion at the second end of the exciter rotor, and the third stop is a convex stop.

[0018] Preferably, both the first extension shaft and the second extension shaft are provided with bearing platforms capable of connecting bearings. The bearing platforms are provided with inner cover platforms and outer cover platforms on both sides, and the inner cover platforms and the outer cover platforms are both protruding relative to the bearing platforms.

[0019] Preferably, the fastener connecting the transition plate and the first extension shaft is a double-ended screw, with its two ends respectively located inside the first extension shaft and the transition plate.

[0020] Preferably, the end of the first extension shaft away from the transition plate is provided with a plurality of fourth stops, the fourth stops being used to connect to the high-speed testing machine.

[0021] The dynamic balancing device provided by this utility model includes a first extending shaft, a second extending shaft, at least one transition plate, and fasteners. The first extending shaft is used to connect to a high-speed testing machine. The first and second extending shafts are correspondingly connected to the two ends of the exciter rotor. The high-speed testing machine can drive the exciter rotor to rotate for dynamic balancing tests. At least one transition plate has at least two stops along its axial direction. One stop can connect to the first extending shaft and the other to the corresponding end of the exciter rotor; alternatively, one stop can connect to the second extending shaft and the other to the corresponding end of the exciter rotor. The device utilizes the at least two stops on the transition plate... The setup ensures precise fit and mechanical strength, guaranteeing accurate positioning and installation of the first extension shaft, second extension shaft, and transition plate relative to the exciter rotor. At least three sets of fasteners are provided to connect the exciter rotor to the first and second extension shafts via the transition plate, ensuring reliable installation of these components relative to the exciter rotor. This setup satisfies the mechanical strength requirements of the exciter rotor at high speeds, enabling dynamic balancing tests at high speeds. It also more accurately simulates the working state of the exciter rotor, improving the precision of exciter rotor imbalance correction.

[0022] The beneficial effects of this utility model are as follows: by setting at least two stops on the transition plate, the first extension shaft and the second extension shaft can be precisely fitted and installed relative to the exciter rotor, ensuring the precision of the fit and mechanical strength, enabling the exciter rotor to undergo dynamic balancing tests at high speed, which is more in line with actual conditions and ensures the accuracy of correcting imbalance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the dynamic balancing device provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the first extension shaft provided by this utility model;

[0026] Figure 3 for Figure 2 A sectional view;

[0027] Figure 4 This is a schematic diagram of the structure of the transition disk provided by this utility model;

[0028] Figure 5 for Figure 4 A sectional view;

[0029] Figure 6 This is a schematic diagram of the structure of the second extension shaft provided by this utility model;

[0030] Figure 7 for Figure 6 A sectional view.

[0031] Figures 1-7 In the accompanying drawings, the reference numerals include:

[0032] 1-First extension shaft; 2-Fastener; 3-Transition disc; 4-Second extension shaft; 5-Exciter rotor; 6-Inner cover platform; 7-Bearing platform; 8-Outer cover platform; 11-First engaging part; 12-Fourth stop; 31-First stop; 32-Second stop; 41-Third stop; 51-Second engaging part; 52-Third engaging part; 101-First fastening hole; 301-Stepped hole; 302-Connecting hole; 401-Second fastening hole. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] The core of this invention is to provide a dynamic balancing device that can solve the problems of dynamic imbalance at high speeds and the mechanical strength of winding insulation at high speeds, as well as the problem of residual imbalance after major overhaul of the exciter rotor. It can detect, analyze, and correct the imbalance of the exciter rotor in real time at high speeds, improve the accuracy and reliability of correction, and enhance the stability and lifespan of the exciter operation.

[0035] The dynamic balancing device provided by this utility model can perform individual high-speed dynamic balancing tests on the exciter rotor 5. It is suitable for dynamic balancing optimization of the exciter rotor 5 in fields such as power equipment and generator sets. Specifically, it includes a first extension shaft 1, a second extension shaft 4, at least one transition plate 3, and at least three sets of fasteners 2. Please refer to [reference needed]. Figure 1 .

[0036] One end of the first extension shaft 1 is connected to the high-speed testing machine, and the other end is connected to the transition plate 3. The first extension shaft 1 and the second extension shaft 4 are used to connect to the two ends of the exciter rotor 5 respectively. By driving the exciter rotor 5 to rotate through the high-speed testing machine, the actual working conditions can be simulated, and the imbalance of the exciter rotor 5 can be detected, analyzed and corrected in real time.

[0037] At least one transition plate 3 is provided, and the transition plate 3 has at least two stops along its axial direction. One stop is connected to the first extension shaft 1 or the second extension shaft 4, and the other stop is used to connect to the corresponding end of the exciter rotor 5.

[0038] In one embodiment, a transition disk 3 is provided, and the transition disk 3 has two stops along its axial direction, one of which is connected to the first extension shaft 1, and the other is used to connect to the corresponding end of the exciter rotor 5.

[0039] In another embodiment, a transition disk 3 is provided, and the transition disk 3 has two stops along its axial direction. The second stop is connected to the extension shaft 4, and the other stop is used to connect to the other end of the exciter rotor 5.

[0040] In another embodiment, two transition disks 3 are provided, and each transition disk 3 has at least two stops along its axial direction. The two stops of one transition disk 3 are respectively connected to one end of the first extension shaft 1 and one end of the exciter rotor 5, and the two stops of the other transition disk 3 are respectively connected to the other end of the second extension shaft 4 and the other end of the exciter rotor 5.

[0041] In all three specific implementation methods described above, the precision of the fit between components and the mechanical strength can be ensured by setting the stop, enabling dynamic balancing tests to be performed under high-speed rotation of the exciter rotor 5, ensuring the accuracy and effectiveness of the imbalance correction of the exciter rotor 5, ensuring the service life of the exciter rotor 5, and reducing maintenance costs.

[0042] In the above three implementation methods, the two stops provided on the transition plate 3 can be either concave or convex, and the specific design can be flexibly selected according to the usage conditions.

[0043] In this embodiment, the accuracy of component fit can be further ensured by increasing the number of stops on the transition plate 3. For example, two or more stops can be set for connecting the first extension shaft 1, and two or more stops can be set for connecting the second extension shaft 4. The specific settings can be flexibly set according to the actual needs of use, without limitation.

[0044] After achieving a precise fit through the stop, reliable installation between the first extension shaft 1, the second extension shaft 4, the transition plate 3, and the exciter rotor 5 is completed by at least three sets of fasteners 2.

[0045] If fastener 2 is configured in three sets, one set is used to connect the first extension shaft 1 and the transition plate 3, one set is used to connect the exciter rotor 5 and the transition plate 3, and one set is used to connect the second extension shaft 4 and the exciter rotor 5. In this case, only one transition plate 3 is used.

[0046] For example, fastener 2 is configured with four sets: one set connects the first extension shaft 1 and the transition plate 3, one set connects the exciter rotor 5 and the transition plate 3, one set connects the second extension shaft 4 and the transition plate 3, and one set connects the transition plate 3 and the exciter rotor 5. In this case, two transition plates 3 are configured.

[0047] In this embodiment, the fastener 2 may include, but is not limited to, bolts, screws, etc., as long as a reliable connection is guaranteed while enabling a detachable connection.

[0048] Based on the above embodiments, please refer to Figure 1 , Figure 5 A first stop 31 and a second stop 32 are provided along the axial direction of the transition plate 3. The first stop 31 is connected to the first engagement part 11 of the first extension shaft 1. The second stop 32 is used to connect to the second engagement part 51 of the first end of the exciter rotor 5. The second extension shaft 4 is connected to the third engagement part 52 of the second end of the exciter rotor 5.

[0049] In this embodiment, the first stop 31 and the second stop 32 axially arranged on the transition disk 3 correspond to the two sides of the transition disk 3. The setting of the first stop 31 and the second stop 32 satisfies the precision fit between the exciter rotor 5 and the transition disk 3, and the precision fit between the first extension shaft 1 and the transition disk 3, respectively.

[0050] The size and shape of the first stop 31 and the second stop 32 are not limited. If the first stop 31 is a convex stop, then the first engaging part 11 of the first extension shaft 1 that mates with it is a concave stop. This arrangement ensures a precise fit between the first extension shaft 1 and the transition plate 3. If the first stop 31 is a concave stop, then the first engaging part 11 of the first extension shaft 1 that mates with it is a convex stop. This arrangement ensures a precise fit between the first extension shaft 1 and the transition plate 3.

[0051] The second stop 32 is similar to the first stop 31 and can be precisely engaged with the second engaging part 51 at the first end of the exciter rotor 5 to ensure a precise engagement between the first end of the exciter rotor 5 and the transition disk 3. The engagement here refers to a concave-convex fit similar to the first stop 31.

[0052] In this embodiment, the second extension shaft 4 is connected to the third engagement part 52 at the second end of the exciter rotor 5. That is, no transition disk 3 is provided at the second end of the exciter rotor 5. The second extension shaft 4 and the third engagement part 52 at the second end of the exciter rotor 5 are directly engaged to ensure a precise fit.

[0053] In this embodiment, the cooperation of the first stop 31 and the first engaging part 11, the cooperation of the second stop 32 and the second engaging part 51, and the cooperation of the third engaging part 52 and the second extension shaft 4 can ensure the precise fit and mechanical strength of the connection between the components. Furthermore, the setting of the fastener 2 can ensure the reliability of the connection between the exciter rotor 5, the transition plate 3, the first extension shaft 1, and the second extension shaft 4, and can ensure the reliable and precise installation of the exciter rotor 5 so as to meet the conditions of the high-speed dynamic balance test and ensure the accuracy of the dynamic balance test.

[0054] Based on any of the above embodiments, please refer to Figure 5 Either the first stop 31 or the second stop 32 is a concave stop, and the other is a convex stop. The first stop 31 is positioned away from the axis of the transition plate 3 relative to the second stop 32.

[0055] By setting the first stop 31 and the second stop 32 to different types of stops, the tight and reliable fit can be ensured through the cooperation between the first extension shaft 1 located on both sides of the transition plate 3 and the first end of the exciter rotor 5, thus ensuring mechanical strength and avoiding the impact of shaking during rotation on the accuracy of the dynamic balance test.

[0056] In this embodiment, the first stop 31 is positioned away from the axis of the transition plate 3 relative to the second stop 32. The two stops are staggered to avoid damage to the components due to concentrated force, thus ensuring the service life and performance of the transition plate 3.

[0057] It should be noted that the first stop 31 and the second stop 32 should both be set to avoid the parts of the fastener 2 connected to the transition plate 3 to avoid interference.

[0058] Based on any of the above embodiments, please refer to Figure 1 , Figure 4 The transition plate 3 has multiple stepped holes 301 at its edge, and fasteners 2 are installed in the stepped holes 301. The edge position here is relative to the center position of the first stop 31 and the second stop 32.

[0059] The stepped hole 301 provides a certain guiding and limiting function for the fastener 2, ensuring the reliability of the connection between components. For example, the fastener 2 installed in the fastening hole is used to connect the first extension shaft 1 and the transition plate 3. The fastener 2 can specifically be a bolt and a nut. By placing the nut at a slightly larger position in the stepped hole 301, the bolt can be tightened and limited by the connecting bolt, preventing bolt displacement and affecting the connection between components. This ensures a precise and reliable connection between the first extension shaft 1 and the transition plate 3, guaranteeing the strength of the mechanical structure.

[0060] In this embodiment, the first extension shaft 1 is also provided with a connecting hole for the fastener 2 to pass through in order to connect the transition disk 3 and the exciter rotor 5.

[0061] Based on any of the above embodiments, please refer to Figure 1 , Figure 2 , Figure 3 The first extension shaft 1 has multiple turns of first fastening holes 101 arranged radially, with at least one turn of the first fastening holes 101 corresponding to the first end of the exciter rotor 5 with a certain outer diameter. Here, "at least one turn" refers to the number of turns of the first fastening holes 101 used for fastening the connection, determined according to the fixed position of the first end of the exciter rotor 5. Here, "fixed position" refers to the connection hole used to connect the exciter rotor 5 and the transition disk 3.

[0062] Of course, this multi-turn first fastening hole 101 setting can also be adaptively adjusted according to the first end of the exciter rotor 5 with different outer diameters, so that the dynamic balancing device can meet more types and specifications of exciter rotor 5 and improve the adaptability of the device.

[0063] For exciter rotors 5 of different types and specifications, the first extension shaft 1 does not need to be replaced; other parts can be replaced instead, which can reduce the operating cost of the device.

[0064] Based on any of the above embodiments, please refer to Figure 1 , Figure 6 , Figure 7 The second extension shaft 4 is radially provided with multiple turns of second fastening holes 401, at least one turn of second fastening holes 401 for the second end of the exciter rotor 5 corresponding to a certain outer diameter.

[0065] The term "at least one turn" here refers to the number of turns of the second fastening hole 401 used for fastening connection, determined according to the fixed position of the second end of the exciter rotor 5. The fixed position here refers to the connection hole used to connect the second end of the exciter rotor 5 and the second extension shaft 4.

[0066] Of course, this multi-turn second fastening hole 401 setting can also be adaptively adjusted according to the second end of the exciter rotor 5 with different outer diameters, so that the dynamic balancing device can meet more types and specifications of exciter rotor 5 and improve the adaptability of the device.

[0067] For exciter rotors 5 of different types and specifications, the second extension shaft 4 does not need to be replaced; other parts can be replaced instead, which can reduce the operating cost of the device.

[0068] By combining the above-mentioned multi-ring first fastening hole 101, the entire dynamic balancing device can be adapted to different types and specifications of exciter rotors 5. Only the structure of the transition plate 3 needs to be replaced, which can reduce the cost of use and improve applicability.

[0069] Based on any of the above embodiments, please refer to Figure 1 The second extension shaft 4 is provided with a third stop 41 for connecting with the third engaging part 52 at the second end of the exciter rotor 5. The third stop 41 is a convex stop, and the corresponding third engaging part 52 is a concave stop. The cooperation between the concave stop and the convex stop can ensure the tight and reliable fit between the second end of the exciter rotor 5 and the second connecting shaft, and ensure mechanical strength, so that the exciter rotor 5 can be reliably installed for dynamic balancing tests under high-speed conditions.

[0070] In this embodiment, the third stop 41 is specifically located at one end close to the exciter rotor 5, and is a recessed area at one end. The protruding area at the second end of the exciter rotor 5 can cooperate with it to achieve a precise fit.

[0071] For the fastening of the exciter rotor 5 and the second extension shaft 4, the fastener 2 is set at the edge of the second extension shaft 4 and avoids the third stop 41, and the fastener 2 passes through the second extension shaft 4 and the second end of the exciter rotor 5 to complete the fastening.

[0072] Based on any of the above embodiments, please refer to Figure 1 , Figure 2 , Figure 6 The first extension shaft 1 and the second extension shaft 4 are each provided with a bearing platform 7 that can connect to the bearing. The bearing platform 7 is provided with an inner cover platform 6 and an outer cover platform 8 on both sides, and the inner cover platform 6 and the outer cover platform 8 are both protruding relative to the bearing platform 7.

[0073] The bearing platform 7 here is specifically used to connect bearings, so that both the first extension shaft 1 and the second extension shaft 4 can rotate reliably and smoothly. This ensures the smooth and reliable rotation of the exciter rotor 5, meets the requirements of high-speed condition simulation, and guarantees the accuracy and effectiveness of dynamic balance testing.

[0074] The height difference between the inner cover platform 6, the outer cover platform 8 and the bearing platform 7 can confine the bearing to the bearing platform 7, ensuring the reliability of the bearing and further ensuring the reliability of the exciter rotor 5.

[0075] Based on any of the above embodiments, please refer to Figure 1 The fastener 2 connecting the transition plate 3 and the first extension shaft 1 is a double-ended screw, with its two ends located inside the first extension shaft 1 and the transition plate 3, respectively. The double-ended screw facilitates the fit between components, resulting in a simple structure, lower cost, and reduced overall operating costs for the dynamic balancing device.

[0076] Based on any of the above embodiments, please refer to Figure 1 , Figure 2 The end of the first extension shaft 1 furthest from the transition plate 3 is provided with several fourth stops 12, which are used to connect to the high-speed testing machine. The connection between the high-speed testing machine and the first extension shaft 1 is ensured by the stop fit, and of course, fasteners 2 are also required to tighten them.

[0077] In this embodiment, multiple fourth stopes 12 can be provided, and one or two types can be provided, depending on the actual situation, without too many restrictions.

[0078] The machining accuracy of the dynamic balancing device provided in this application will be further elaborated below:

[0079] Please refer to Figure 2 , Figure 3 For the first extension shaft 1, the coaxiality of the reference A and the bearing platform 7 on the first extension shaft 1 is less than or equal to 0.03 mm, and the positional accuracy of the threaded hole on the first extension shaft 1 used to connect to the high-speed testing machine relative to the reference A is less than or equal to 0.2 mm; the coaxiality of the reference B and the bearing platform 7 is less than or equal to 0.03 mm, the coaxiality of the reference B and the fourth stop 12 is less than or equal to 0.03 mm, the perpendicularity of the reference B and the end face of the first extension shaft 1 near the transition plate 3 does not exceed 0.08 mm, and the positional accuracy of the reference B and the first fastening hole 101 is less than or equal to 0.2 mm; the coaxiality of the reference C located at the bearing platform 7 of the first extension shaft 1 and the inner cover platform 6 and the outer cover platform 8 is less than or equal to 0.025 mm; the cylindricity of the bearing platform 7 is less than or equal to 0.008 mm, and the surface roughness is less than or equal to 0.4 mm. By ensuring the precision of machining of each part of the first extension shaft 1, its unbalanced mass is reduced. At the same time, by strictly matching the form and position tolerances, the overall mechanical strength and applicability of the universal overspeed test extension shaft are guaranteed.

[0080] Please refer to Figure 4 , Figure 5 For the transition plate 3: the machining tolerance of the first stop 31 is -0.18mm to -0.21mm, and the positional tolerance of datum A and stepped hole 301 is less than or equal to 0.2mm; the machining tolerance of the second stop 32 is 0.12mm to 0.16mm, and the positional tolerance of datum B and stepped hole 301 is less than or equal to 0.2mm. By precision machining the dimensions of the stops at both ends of the transition plate 3, while ensuring the form and position tolerances of the mounting threads, the mechanical strength of the device connection is met. Furthermore, this transition plate 3 is simple and lightweight. For exciter rotors 5 of different structures or manufacturers, corresponding process transition plates 3 can be designed, reducing production costs and improving applicability.

[0081] Please refer to Figure 6 , Figure 7For the second extension shaft 4: the coaxiality between datum A and bearing platform 7 is less than or equal to 0.03 mm; the coaxiality between datum A and inner cover platform 6 and outer cover platform 8 is less than or equal to 0.025 mm; the cylindricity of bearing platform 7 is less than or equal to 0.008 mm. By improving the machining precision of each part of the second extension shaft 4, its own unbalanced mass is reduced, ensuring that the dynamic balancing process is stable, accurate, and controllable.

[0082] The aforementioned dynamic balancing device enables high-speed drive connection, allowing stepless speed regulation of the exciter rotor 5 from 0-4000 rpm, with a rotor balancing accuracy resolution of 0.1 g·mm / kg. This extends the service life of the exciter rotor 5 and reduces maintenance costs. A single high-speed dynamic balancing operation can complete the balance detection and correction of the exciter rotor 5. Furthermore, the redesigned transition plate 3 allows for the switching of exciter rotors 5 from different structures and manufacturers, facilitating efficient repair of the exciter rotor 5 and demonstrating good applicability.

[0083] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] The dynamic balancing device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A dynamic balancing device, characterized in that, include: The first extension shaft (1) is used to connect to the high-speed testing machine; The second extension shaft (4) and the first extension shaft (1) and the second extension shaft (4) are used to connect the two ends of the exciter rotor (5) respectively; At least one transition disk (3) is provided with at least two stops along the axial direction of the transition disk (3), one of which is connected to the first extension shaft (1) or the second extension shaft (4), and the other is used to connect to the corresponding end of the exciter rotor (5); At least three sets of fasteners (2) are used to connect the exciter rotor (5) between the first extension shaft (1) and the second extension shaft (4) via the transition plate (3).

2. The dynamic balancing device according to claim 1, characterized in that, A first stop (31) and a second stop (32) are provided along the axial direction of the transition plate (3). The first stop (31) is connected to the first engagement part (11) of the first extension shaft (1). The second stop (32) is used to connect to the second engagement part (51) of the first end of the exciter rotor (5). The second extension shaft (4) is connected to the third engagement part (52) of the second end of the exciter rotor (5).

3. The dynamic balancing device according to claim 2, characterized in that, Either the first stop (31) or the second stop (32) is a concave stop and the other is a convex stop. The first stop (31) is positioned away from the axis of the transition plate (3) relative to the second stop (32).

4. The dynamic balancing device according to claim 3, characterized in that, The transition plate (3) has multiple stepped holes (301) at its edge, and the fastener (2) is provided in the stepped holes (301).

5. The dynamic balancing device according to claim 4, characterized in that, The first extension shaft (1) is radially provided with multiple turns of first fastening holes (101), at least one turn of the first fastening holes (101) is used for the first end of the exciter rotor (5) corresponding to an outer diameter.

6. The dynamic balancing device according to claim 5, characterized in that, The second extension shaft (4) is radially provided with multiple turns of second fastening holes (401), at least one turn of the second fastening holes (401) for the second end of the exciter rotor (5) corresponding to an outer diameter.

7. The dynamic balancing device according to claim 2, characterized in that, The second extension shaft (4) is provided with a third stop (41) for connecting with the third engagement part (52) at the second end of the exciter rotor (5), and the third stop (41) is a convex stop.

8. The dynamic balancing device according to any one of claims 1 to 7, characterized in that, Both the first extension shaft (1) and the second extension shaft (4) are provided with bearing platforms (7) that can connect bearings. The bearing platforms (7) are provided with inner cover platforms (6) and outer cover platforms (8) on both sides respectively. The inner cover platforms (6) and the outer cover platforms (8) are both protruding relative to the bearing platforms (7).

9. The dynamic balancing device according to claim 8, characterized in that, The fastener (2) connecting the transition plate (3) and the first extension shaft (1) is a double-ended screw, with the two ends of the double-ended screw located in the first extension shaft (1) and the transition plate (3), respectively.

10. The dynamic balancing device according to claim 9, characterized in that, The first extension shaft (1) has several fourth stops (12) at one end away from the transition plate (3), and the fourth stops (12) are used to connect the high-speed testing machine.

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