Rotor dynamic balance structure and gas turbine

Abstract

The utility model belongs to the technical field of gas turbine rotor dynamic balance, and discloses a rotor dynamic balance structure and a gas turbine. The rotor dynamic balance device comprises a supporting assembly, a first wheel disc and a counterweight cam. Wherein a stay bolt is rotationally arranged on the supporting assembly, the stay bolt is sleeved with the first wheel disc, the first wheel disc and the stay bolt synchronously rotate, the stay bolt is sleeved with the balance weight cam, the balance weight cam can rotate around the stay bolt relative to the first wheel disc, and the side, in the axial direction of the stay bolt, of the balance weight cam is detachably and fixedly connected with the first wheel disc. According to the rotor dynamic balance structure and the gas turbine provided by the utility model, the process of repeatedly mounting and dismounting the counterweight part is omitted, the dynamic balance adjustment of the rotor can be quickly realized, the operation of the dynamic balance adjustment is simplified, and the efficiency of the dynamic balance adjustment of the rotor is improved.

Description

Technical Field

[0001] This utility model relates to the field of dynamic balancing technology for gas turbine rotors, and in particular to a rotor dynamic balancing structure and a gas turbine. Background Technology

[0002] Existing rotors often exhibit rotational imbalance due to manufacturing errors, blade deformation, or wear. This imbalance is a major source of engine vibration, especially in high-speed engines. It significantly impacts rotor vibration, accelerating wear on bearings and shaft seals, reducing engine lifespan and operating efficiency. Therefore, balancing the rotor is a crucial step in the manufacturing and assembly process. Dynamic balancing is necessary from component assembly to final product assembly. There are generally two methods for dynamic balancing: one is the weight removal method, which involves removing material from the rotor discs and weighing each disc individually before assembling them; the other is the weight addition method, which involves adding counterweights to the rotor to bring its rotation center within a normal range, thus achieving stable engine operation.

[0003] In the prior art, a method for dynamic balancing a rotor is disclosed. This method involves a center-of-gravity adjustment component at the end of the rotating shaft. The adjustment component includes a bushing and a counterweight. The bushing is fitted onto the rotating shaft and threadedly connected to it, with the thread direction opposite to the rotation direction of the shaft. The counterweight is threadedly connected to the bushing. When the rotor exhibits an imbalance on a dynamic balancing machine, counterweights of appropriate weight can be installed at symmetrical positions within a 180° radius around its circumference. This process is repeated multiple times until the rotor's imbalance meets the required precision. However, the repeated adjustment process, involving the installation and removal of the counterweight, complicates the operation of the counterweight, hindering the rapid achievement of rotor dynamic balancing and reducing the efficiency of the dynamic balancing adjustment. Utility Model Content

[0004] The purpose of this invention is to provide a rotor dynamic balancing structure and a gas turbine. This structure enables rapid rotor dynamic balancing, simplifies the operation, and improves the efficiency of rotor dynamic balancing.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Rotor dynamic balancing structure, used to balance the unbalance of the rotor, includes:

[0007] A support assembly, on which a tie rod bolt is rotatably mounted;

[0008] The first wheel is sleeved on the tie rod bolt and rotates synchronously with the tie rod bolt;

[0009] A counterweight cam is sleeved on the tie rod bolt. The counterweight cam is rotatable relative to the first wheel disc about the tie rod bolt, and the counterweight cam is detachably fixedly connected to the first wheel disc on one side along the axial direction of the tie rod bolt.

[0010] Preferably, the counterweight cam includes:

[0011] A cam body of equal thickness, wherein the ratio of the radial direction of the cam body to the thickness of the cam body is 5-10.

[0012] Preferably, along the axial direction of the tie rod bolt, the first wheel is provided with a plurality of first protruding teeth on the side facing the counterweight cam, the plurality of first protruding teeth are arranged at intervals along the circumferential direction of the tie rod bolt, and a first concave tooth is formed between two adjacent first protruding teeth. Along the axial direction of the tie rod bolt, the counterweight cam is provided with a second protruding tooth on the side facing the first wheel, and the second protruding tooth can engage with any one of the first concave teeth.

[0013] Preferably, the counterweight cam has two second protruding teeth on the side facing the first wheel, and the two second protruding teeth are spaced apart along the circumferential direction of the tie rod bolt so that two second concave teeth are formed between the two second protruding teeth. The first wheel has two first protruding teeth on the side facing the counterweight cam, and the two first protruding teeth are spaced apart along the circumferential direction of the tie rod bolt so that two first concave teeth are formed between the two first protruding teeth. The two second protruding teeth correspond one-to-one with the two first concave teeth, and the two first protruding teeth correspond one-to-one with the two second concave teeth.

[0014] Preferably, the first tooth and the second tooth have the same structure.

[0015] Preferably, the counterweight cam is made of the same material as the first wheel.

[0016] Preferably, the rotor dynamic balancing structure further includes:

[0017] A first bushing is fitted onto the tie rod bolt and is capable of abutting against the side of the first wheel disk away from the counterweight cam.

[0018] Preferably, the rotor dynamic balancing structure further includes:

[0019] The second wheel is sleeved on the tie rod bolt and spaced apart from the first wheel. The counterweight cam is located between the first wheel and the second wheel along the axial direction of the tie rod bolt. The other side of the counterweight cam is detachably and fixedly connected to the second wheel.

[0020] Preferably, the rotor dynamic balancing structure further includes:

[0021] The second bushing is sleeved on the tie rod bolt and can abut against the side of the second wheel disk away from the counterweight cam.

[0022] A gas turbine includes a turbine body and the aforementioned rotor dynamic balancing structure, wherein the rotor dynamic balancing structure is disposed on the turbine body.

[0023] The beneficial effects of this utility model are:

[0024] This utility model provides a rotor dynamic balancing structure and a gas turbine for balancing rotor imbalance. The rotor dynamic balancing device includes a support assembly, a first wheel disc, and a counterweight cam. A tie rod bolt is rotatably mounted on the support assembly. The first wheel disc is sleeved on the tie rod bolt and rotates synchronously with the tie rod bolt. The counterweight cam is sleeved on the tie rod bolt and can rotate relative to the first wheel disc around the tie rod bolt. The counterweight cam is detachably and fixedly connected to the first wheel disc on one side along the axial direction of the tie rod bolt.

[0025] Because the first wheel rotates synchronously with the tie rod bolt, and the counterweight cam can rotate relative to the first wheel, and the counterweight cam is detachably fixed to the first wheel on one side along the axial direction of the tie rod bolt, when adjusting the rotor's imbalance, the counterweight cam is rotated by a certain angle and then fixed to the first wheel, causing the center of gravity of the counterweight cam to change. This generates centrifugal forces of different directions and magnitudes when the rotor rotates, thus balancing the rotor's imbalance. By adjusting the rotation angle of the counterweight cam relative to the first wheel, the centrifugal force generated by the counterweight cam is made equal in magnitude and opposite in direction to the rotor's imbalance, achieving a dynamic balance effect. This eliminates the need for repeated installation and removal of the counterweight, enabling rapid dynamic balance adjustment of the rotor, simplifying the operation, and improving the efficiency of rotor dynamic balance adjustment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the rotor dynamic balancing structure provided in an embodiment of the present invention;

[0027] Figure 2 This is a partial schematic diagram of the rotor dynamic balancing structure provided in an embodiment of the present invention;

[0028] Figure 3 This is a first schematic diagram of the counterweight cam provided in this embodiment of the utility model;

[0029] Figure 4 This is a second schematic diagram of the counterweight cam provided in this embodiment of the utility model;

[0030] Figure 5 This is a first sectional view of the counterweight cam provided in this embodiment of the utility model;

[0031] Figure 6 This is a second sectional view of the counterweight cam provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 1. Support components; 11. Front support component; 12. Rear support component;

[0034] 2. First disc; 21. First spoke; 22. First blade;

[0035] 3. Counterweight cam; 31. Equal thickness cam body; 32. Second convex tooth; 33. Second concave tooth; 34. Fourth convex tooth; 35. Fourth concave tooth;

[0036] 4. First bushing; 5. Second disc; 51. Second spoke; 52. Second blade; 6. Second bushing; 7. Tie rod bolt. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] This embodiment provides a rotor dynamic balancing structure, such as Figures 1-6 As shown, the component used to balance the unbalance of the rotor includes a support assembly 1, a first wheel 2, and a counterweight cam 3. A tie rod bolt 7 is rotatably mounted on the support assembly 1. The first wheel 2 is sleeved on the tie rod bolt 7 and rotates synchronously with the tie rod bolt 7. The counterweight cam 3 is sleeved on the tie rod bolt 7 and can rotate relative to the first wheel 2 around the tie rod bolt 7. The counterweight cam 3 is detachably and fixedly connected to the first wheel 2 on one side along the axial direction of the tie rod bolt 7.

[0042] Since the first disc 2 rotates synchronously with the tie rod bolt 7, and the counterweight cam 3 can rotate relative to the first disc 2, and the counterweight cam 3 is detachably fixed to the first disc 2 on one side along the axial direction of the tie rod bolt 7, when adjusting the rotor's imbalance, the counterweight cam 3 is rotated by a certain angle and then fixed to the first disc 2, causing the center of gravity of the counterweight cam 3 to change. This generates centrifugal forces of different directions and magnitudes when the rotor rotates, thus balancing the rotor's imbalance. By adjusting the rotation angle of the counterweight cam 3 relative to the first disc 2, the centrifugal force generated by the counterweight cam 3 is made equal in magnitude and opposite in direction to the rotor's imbalance, achieving a dynamic balance effect. This eliminates the need for repeated installation and disassembly of the counterweight, enabling rapid dynamic balance adjustment of the rotor, simplifying the operation of dynamic balance adjustment, and improving the efficiency of rotor dynamic balance adjustment.

[0043] Optionally, such as Figure 1 As shown, in this embodiment, the support assembly 1 includes a front support member 11 and a rear support member 12, which are spaced apart. The two ends of the tie rod bolt 7 are rotatably connected to the front support member 11 and the rear support member 12, respectively. The first wheel 2 and the counterweight cam 3 are arranged at intervals and located between the front support member 11 and the rear support member 12.

[0044] Optionally, such as Figure 2As shown, in this embodiment, the first wheel 2 includes a first spoke 21 and a first blade 22. The first spoke 21 is sleeved on the tie rod bolt 7 and rotates synchronously with the tie rod bolt 7. The first blade 22 is fixedly connected to the outer circumferential surface of the first spoke 21. Specifically, in this embodiment, the first blade 22 and the first spoke 21 are integrally formed. In other embodiments, the first blade 22 and the first spoke 21 can also be welded or bonded, etc. No limitations are imposed here. It should be noted that the counterweight cam 3 is detachably and fixedly connected to the first spoke 21 on one side along the axial direction of the tie rod bolt 7.

[0045] Specifically, in this embodiment, the counterweight cam 3 is connected to the first wheel spoke 21 on one side along the axial direction of the tie rod bolt 7 via a meshing of convex and concave teeth. In other embodiments, the counterweight cam 3 can also be connected to the first wheel spoke 21 on one side along the axial direction of the tie rod bolt 7 via a snap-fit ​​connection using a slot and a snap-fit ​​connection, or a through hole can be provided on the counterweight cam 3, and a corresponding blind hole can be provided on the first wheel spoke 21, with a bolt passing through the through hole and connected to the blind hole; or multiple through holes can be provided on the counterweight cam 3, and multiple corresponding pins can be protruded on the first wheel spoke 21, with the through holes capable of connecting to any one of the pins, etc. No limitations are imposed here.

[0046] Furthermore, such as Figures 2-4 As shown, along the axial direction of the tie rod bolt 7, the first wheel 2 has multiple first protruding teeth (not shown in the figure) on the side facing the counterweight cam 3. These first protruding teeth are spaced apart along the circumferential direction of the tie rod bolt 7, and a first concave tooth (not shown in the figure) is formed between adjacent first protruding teeth. Along the axial direction of the tie rod bolt 7, the counterweight cam 3 has a second protruding tooth 32 on the side facing the first wheel 2. The second protruding tooth 32 can engage with any one of the first concave teeth. The meshing structure formed by the first concave tooth and the second protruding tooth 32 not only enhances the stability of the connection between the first wheel 2 and the counterweight cam 3, but also enables precise positioning and reliable transmission during relative motion, effectively ensuring the reliability of the rotor dynamic balancing mechanism.

[0047] Optionally, such as Figures 2-4As shown, in this embodiment, the counterweight cam 3 has two second protruding teeth 32 on the side facing the first wheel 2. The two second protruding teeth 32 are spaced apart along the circumferential direction of the tie rod bolt 7, so that two second concave teeth 33 are formed between the two second protruding teeth 32. The first wheel 2 has two first protruding teeth on the side facing the counterweight cam 3. The two first protruding teeth are spaced apart along the circumferential direction of the tie rod bolt 7, so that two first concave teeth are formed between the two first protruding teeth. The two second protruding teeth 32 correspond one-to-one with the two first concave teeth, and the two first protruding teeth correspond one-to-one with the two second concave teeth 33. The above arrangement makes the first protruding teeth mesh with the second concave teeth 33, and the second protruding teeth 32 mesh with the first concave teeth. In this way, the first wheel spoke 21 and the counterweight cam 3 mesh with each other, further enhancing the connection stability of the first wheel spoke 21 and the counterweight cam 3. In other embodiments, the counterweight cam 3 has three second protruding teeth 32 on the side facing the first wheel 2, and three second concave teeth 33 are formed between the three second protruding teeth 32. The first wheel 2 has three first protruding teeth on the side facing the counterweight cam 3, and three first concave teeth are formed between the three first protruding teeth. The three second protruding teeth 32 correspond one-to-one with the three first concave teeth, and the three first protruding teeth correspond one-to-one with the three second concave teeth 33, and so on. No limitation is made here.

[0048] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, both the first and second protruding teeth 32 are arc-shaped protruding teeth. Since both the first spoke 21 and the counterweight cam 3 are near-circular structures, and both rotate, the arc-shaped protruding teeth better match the rotor's rotation. Furthermore, the arc-shaped protruding teeth effectively reduce friction and collisions between components due to shape mismatch, thus reducing energy loss and mechanical wear during operation. In other embodiments, the first and second protruding teeth 32 can also be square protrusions or trapezoidal protrusions, etc. No limitation is imposed here.

[0049] More specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, the second protruding tooth 32 is an arc-shaped protruding tooth with a central angle of 90°, and the two arc-shaped protruding teeth are arranged opposite each other. Similarly, the first protruding tooth is an arc-shaped protruding tooth with a central angle of 90°, and the two arc-shaped protruding teeth are arranged opposite each other. The identical first and second protruding teeth 32 make the shapes of the first and second concave teeth 33 the same, which makes it easier for the counterweight cam 3 and the first spoke 21 to mesh. The protruding and concave teeth of the same shape can form an intuitive and efficient guiding structure, and quickly complete the meshing. In other embodiments, the second protruding tooth 32 can also be an arc-shaped protruding tooth with a central angle of 60°, and the three arc-shaped protruding teeth are evenly arranged along the circumference of the tie rod bolt 7. Similarly, the first protruding tooth is an arc-shaped protruding tooth with a central angle of 60°, and the three arc-shaped protruding teeth are evenly arranged along the circumference of the tie rod bolt 7.

[0050] Optionally, in this embodiment, the counterweight cam 3 and the first wheel 2 are made of the same material. In other embodiments, the counterweight cam 3 and the first wheel 2 may be made of different materials.

[0051] Specifically, in this embodiment, both the counterweight cam 3 and the first wheel 2 are made of nickel-based alloy. In other embodiments, both the counterweight cam 3 and the first wheel 2 are made of titanium alloy, or the counterweight cam 3 is made of nickel-based alloy and the first wheel 2 is made of titanium alloy, etc. No limitations are imposed here.

[0052] Furthermore, such as Figure 1 and Figure 2 As shown, the rotor dynamic balancing structure also includes a first bushing 4, which is fitted onto the tie rod bolt 7. The first bushing 4 can abut against the side of the first wheel 2 away from the counterweight cam 3. The first bushing 4 prevents the first wheel 2 from axially moving during rotation, enhances the positioning accuracy of the first wheel 2 in the axial direction, and ensures the stability of rotor operation.

[0053] Specifically, such as Figure 2 As shown, in this embodiment, the inner wall of the first bushing 4 is tightly fitted with the outer wall of the tie rod bolt 7, causing the first bushing 4 to rotate synchronously with the first wheel 2.

[0054] Furthermore, such as Figure 1 and Figure 2 As shown, the rotor dynamic balancing structure also includes a second wheel 5, which is sleeved on the tie rod bolt 7 and spaced apart from the first wheel 2. The counterweight cam 3 is located between the first wheel 2 and the second wheel 5, along the axial direction of the tie rod bolt 7, and the other side of the counterweight cam 3 is detachably and fixedly connected to the second wheel 5.

[0055] Optionally, such as Figure 2 As shown, in this embodiment, the second wheel 5 includes a second spoke 51 and a second blade 52. The second spoke 51 is sleeved on the tie rod bolt 7 and rotates synchronously with the tie rod bolt 7. The second blade 52 is fixedly connected to the outer circumferential surface of the second spoke 51. The second blade 52 and the second spoke 51 are integrally formed. In other embodiments, the second blade 52 and the second spoke 51 can also be welded or bonded, etc. No limitations are imposed here. It should be noted that the counterweight cam 3 is detachably and fixedly connected to the second spoke 51 on one side along the axial direction of the tie rod bolt 7.

[0056] Specifically, in this embodiment, the counterweight cam 3 is connected to the second wheel spoke 51 on one side along the axial direction of the tie rod bolt 7 via a meshing of convex and concave teeth. In other embodiments, the counterweight cam 3 can also be connected to the second wheel spoke 51 via a slot and a snap-fit ​​connection, or a through hole can be provided on the counterweight cam 3 and a corresponding blind hole can be provided on the second wheel spoke 51, with a bolt passing through the through hole and connected to the blind hole; or multiple through holes can be provided on the counterweight cam 3 and multiple corresponding pins can be protruded on the second wheel spoke 51, with the through holes capable of connecting to any one of the pins, etc. No limitations are imposed here.

[0057] Optionally, such as Figures 2-4 As shown, in this embodiment, the counterweight cam 3 has two fourth protruding teeth 34 on the side facing the second wheel spoke 51. The two fourth protruding teeth 34 are spaced apart along the circumferential direction of the tie rod bolt 7, so that two fourth concave teeth 35 are formed between the two fourth protruding teeth 34. The second wheel spoke 51 has two third protruding teeth (not shown in the figure) on the side facing the counterweight cam 3. The two third protruding teeth are spaced apart along the circumferential direction of the tie rod bolt 7, so that two third concave teeth (not shown in the figure) are formed between the two third protruding teeth. The two fourth protruding teeth 34 correspond one-to-one with the two third concave teeth, and the two third protruding teeth correspond one-to-one with the two fourth concave teeth 35. The above arrangement makes the third protruding teeth mesh with the fourth concave teeth 35, and the fourth protruding teeth 34 mesh with the third concave teeth. In this way, the second wheel spoke 51 and the counterweight cam 3 mesh with each other, further enhancing the connection stability of the second wheel spoke 51 and the counterweight cam 3. In other embodiments, the counterweight cam 3 has three fourth convex teeth 34 on the side facing the second wheel spoke 51, forming three fourth concave teeth 35. The second wheel spoke 51 has three third convex teeth on the side facing the counterweight cam 3, forming three third concave teeth. The three fourth convex teeth 34 correspond one-to-one with the three third concave teeth, and the three third convex teeth correspond one-to-one with the three fourth concave teeth 35, and so on. No limitation is made here.

[0058] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, both the third and fourth protruding teeth 34 are arc-shaped protruding teeth. Since both the second wheel spoke 51 and the counterweight cam 3 are near-circular structures, and both rotate, the arc-shaped protruding teeth better match the rotor's rotation. Furthermore, the arc-shaped protruding teeth effectively reduce friction and collisions between components due to shape mismatch, thus reducing energy loss and mechanical wear during operation. In other embodiments, the third and fourth protruding teeth 34 can also be square protrusions or trapezoidal protrusions, etc. No limitations are imposed here.

[0059] More specifically, such as Figure 3 and Figure 4As shown, in this embodiment, the fourth protruding tooth 34 is an arc-shaped protruding tooth with a central angle of 90°, and the two arc-shaped protruding teeth are arranged opposite each other. Similarly, the third protruding tooth is an arc-shaped protruding tooth with a central angle of 90°, and the two arc-shaped protruding teeth are arranged opposite each other. The identical third and fourth protruding teeth 34 make the shapes of the formed third and fourth concave teeth 35 the same, which makes it easier for the counterweight cam 3 and the second wheel spoke 51 to mesh. The protruding and concave teeth of the same shape can form an intuitive and efficient guiding structure, and quickly complete the meshing. In other embodiments, the fourth protruding tooth 34 can also be an arc-shaped protruding tooth with a central angle of 60°, and the three arc-shaped protruding teeth are evenly arranged along the circumference of the tie rod bolt 7. Similarly, the third protruding tooth is an arc-shaped protruding tooth with a central angle of 60°, and the three arc-shaped protruding teeth are evenly arranged along the circumference of the tie rod bolt 7.

[0060] Specifically, in this embodiment, the second wheel 5 is made of a nickel-based alloy. In other embodiments, the second wheel 5 is made of a titanium alloy, etc. No limitations are imposed here.

[0061] Furthermore, such as Figure 1 and Figure 2 As shown, the rotor dynamic balancing structure also includes a second bushing 6, which is fitted onto the tie rod bolt 7. The second bushing 6 can abut against the side of the second spoke 51 away from the counterweight cam 3. The second bushing 6 prevents the second wheel 5 from axially shifting during rotation, enhances the positioning accuracy of the second spoke 51 in the axial direction, and ensures the stability of rotor operation.

[0062] Specifically, such as Figure 2 As shown, in this embodiment, the inner wall of the second bushing 6 is tightly fitted with the outer wall of the tie rod bolt 7, causing the second bushing 6 to rotate synchronously with the second wheel 5.

[0063] For the counterweight cam 3, along the axial direction of the tie rod bolt 7, the opposite sides of the counterweight cam 3 are respectively engaged with the first wheel spoke 21 and the second wheel spoke 51, making the counterweight cam 3 more stable when rotating.

[0064] At the same time, such as Figure 3 and Figure 4 As shown, in this embodiment, the two second protruding teeth 32 along the axial direction of the tie rod bolt 7 correspond to the two fourth concave teeth 35, and the two second concave teeth 33 along the axial direction of the tie rod bolt 7 correspond to the two fourth protruding teeth 34. That is, the two second protruding teeth 32 and the two fourth protruding teeth 34 are staggered by 90° along the axial direction of the tie rod bolt 7. This arrangement can effectively distribute the load borne by the second protruding teeth 32 and the fourth protruding teeth 34 during operation, avoid local stress concentration, and improve the stability and reliability of the mechanical system. On the other hand, the 90° staggered arrangement can achieve more efficient transmission and positioning functions.

[0065] Optionally, such as Figures 3-6 As shown, in this embodiment, the counterweight cam 3 includes a cam body 31 of equal thickness, two second convex teeth 32 and two fourth convex teeth 34. The two second convex teeth 32 are fixedly connected to the side of the cam body 31 of equal thickness facing the first spoke 21, and the two fourth convex teeth 34 are fixedly connected to the side of the cam body 31 of equal thickness facing the second spoke 51.

[0066] Preferably, such as Figure 3 and Figure 4 As shown, in this embodiment, the counterweight cam 3 includes a cam body 31 of uniform thickness, and the ratio of the radial distance to the thickness of the cam body 31 is 5-10. That is, the ratio of the maximum radial distance to the thickness of the cam body 31 is 10, the ratio of the minimum radial distance to the thickness of the cam body 31 is 5, and the ratio of the radial distance to the thickness of the cam body 31 fluctuates within the range of 5-10. When this ratio is controlled within the range of 5-10, the cam body 31 can exhibit good overall performance during operation. Specifically, if the ratio is less than 5, the thickness of the equal-thickness cam body 31 is relatively large, which may lead to a bulky overall structure and increase unnecessary material consumption. At the same time, when operating at high speed, the large inertia will affect the response speed and motion accuracy of the counterweight cam 3. When the ratio exceeds 10, the thickness of the equal-thickness cam body 31 is relatively too thin. When bearing a large load, it is easy to have insufficient strength, which will affect the service life of the counterweight cam 3.

[0067] It should be noted that in this embodiment, there are two wheels, namely the first wheel 2 and the second wheel 5, and two bushings, namely the first bushing 4 and the second bushing 6. In other embodiments, the number of wheels and bushings is not limited.

[0068] This embodiment also provides a gas turbine, including a turbine body and a rotor dynamic balancing structure, the rotor dynamic balancing structure being disposed on the turbine body. By applying this rotor balancing structure, the process of repeatedly installing and disassembling counterweights is eliminated, enabling rapid rotor dynamic balancing adjustment, simplifying the dynamic balancing operation, and improving the efficiency of rotor dynamic balancing adjustment.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor dynamic balancing structure for balancing rotor imbalance, characterized in that, include: A support assembly (1) is rotatably provided with a tie rod bolt (7); The first wheel (2) is sleeved on the tie rod bolt (7) and rotates synchronously with the tie rod bolt (7); The counterweight cam (3) is sleeved on the tie rod bolt (7). The counterweight cam (3) can rotate around the tie rod bolt (7) relative to the first wheel (2). The counterweight cam (3) is detachably fixedly connected to the first wheel (2) on one side along the axial direction of the tie rod bolt (7).

2. The rotor dynamic balancing structure according to claim 1, characterized in that, The counterweight cam (3) includes: A cam body of equal thickness (31) has a radial ratio of 5-10 to its thickness.

3. The rotor dynamic balancing structure according to claim 1, characterized in that, Along the axial direction of the tie rod bolt (7), the first wheel (2) is provided with a plurality of first protruding teeth on the side facing the counterweight cam (3). The plurality of first protruding teeth are arranged at intervals along the circumferential direction of the tie rod bolt (7), and a first concave tooth is formed between two adjacent first protruding teeth. Along the axial direction of the tie rod bolt (7), the counterweight cam (3) is provided with a second protruding tooth (32) on the side facing the first wheel (2). The second protruding tooth (32) can mesh with any one of the first concave teeth.

4. The rotor dynamic balancing structure according to claim 3, characterized in that, The counterweight cam (3) has two second protruding teeth (32) on one side facing the first wheel (2). The two second protruding teeth (32) are arranged at intervals along the circumferential direction of the tie rod bolt (7) so that two second concave teeth (33) are formed between the two second protruding teeth (32). The first wheel (2) has two first protruding teeth on one side facing the counterweight cam (3). The two first protruding teeth are arranged at intervals along the circumferential direction of the tie rod bolt (7) so that two first concave teeth are formed between the two first protruding teeth. The two second protruding teeth (32) correspond one-to-one with the two first concave teeth, and the two first protruding teeth correspond one-to-one with the two second concave teeth (33).

5. The rotor dynamic balancing structure according to claim 3, characterized in that, The first convex tooth and the second convex tooth (32) have the same structure.

6. The rotor dynamic balancing structure according to any one of claims 1-5, characterized in that, The counterweight cam (3) is made of the same material as the first wheel (2).

7. The rotor dynamic balancing structure according to any one of claims 1-5, characterized in that, The rotor dynamic balancing structure also includes: The first bushing (4) is sleeved on the tie rod bolt (7) and can abut against the side of the first wheel (2) away from the counterweight cam (3).

8. The rotor dynamic balancing structure according to any one of claims 1-5, characterized in that, The rotor dynamic balancing structure also includes: The second wheel (5) is sleeved on the tie rod bolt (7) and spaced apart from the first wheel (2). The counterweight cam (3) is located between the first wheel (2) and the second wheel (5) along the axial direction of the tie rod bolt (7). The other side of the counterweight cam (3) is detachably fixedly connected to the second wheel (5).

9. The rotor dynamic balancing structure according to claim 8, characterized in that, The rotor dynamic balancing structure also includes: The second bushing (6) is fitted onto the tie rod bolt (7) and can abut against the side of the second wheel disc (5) away from the counterweight cam (3).

10. A gas turbine, characterized in that, It includes the turbine body and the rotor dynamic balancing structure according to any one of claims 1-9, wherein the rotor dynamic balancing structure is disposed on the turbine body.

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