Balancing fixture

Abstract

The application discloses a balancing tool for balancing a rotor disc, which comprises a balancing disc, a plurality of supporting beams and a plurality of supporting columns, the plurality of supporting beams are arranged along different radial directions of the same side of the balancing disc, and a supporting column is arranged on each supporting beam correspondingly, and the supporting column is used for supporting and positioning the rotor disc. The balancing tool changes the radial position of the supporting beam on the balancing disc, supports the rotor discs of different sizes on the balancing tool, realizes that one balancing tool can satisfy the balancing of the rotor discs with different diameters, and thus realizes the universality of the balancing tool, reduces the types of the tool, and reduces the cost. The centering column and the supporting column are combined on the supporting column, the connecting piece of different rotor discs does not need to be replaced frequently, the tool adjustment time required for replacing the rotor disc is reduced, the accurate centering of the balancing tool and the rotor disc is ensured, the adjustment is convenient, the risk of wrong installation can be avoided, and the adjustment period of the balancing tool is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of aero-engines, and more specifically to a balancing fixture. Background Technology

[0002] Current aero-engines generally employ single-rotor, dual-rotor, or triple-rotor structures. Regardless of the structure, they all contain numerous internal components of varying sizes, such as discs, drums, disc-drums, cones, and rotor assemblies. To reduce the probability of vibration in aero-engines, these components need to be balanced during assembly, and any remaining imbalance must be effectively controlled. Generally, a balance accuracy level between G2 and G6.4 is required. Figure 1 As shown, the low-pressure turbine rotor consists of multiple stages of discs, each with a different diameter. Existing balancing fixtures for disc-shaped parts are roughly as described in the balancing fixture disclosed in Chinese Patent CN201621099377.8. Centering and limiting are achieved through the disc center stop or connecting holes on the disc mounting edge. Three centering cylinders are used to center the disc-shaped part to the balancing fixture, and three support studs are used to tighten the axial position of the disc-shaped part with bolts. Since a single model of rotor has a large number of discs of varying diameters, to reduce the variety of fixtures, connecting holes are usually set on the balancing disc (also called the support disc) of the balancing fixture according to the diameter of the engine rotor disc. Multiple sets of connecting holes are set at different angles to install three centering supports and three support supports for different rotor discs. A single model of engine has approximately 20 rotor discs. Each time a rotor is replaced, the centering supports and support supports need to be reinstalled. Due to frequent adjustments, the workload is large and the cycle is long. In addition, to meet the requirements of tooling versatility, a single model needs to have dozens or even hundreds of connection holes set in different radial and angular directions of the balance disc, making it difficult to distinguish the installation positions of the centering support and support support of different rotor discs, increasing the risk of incorrect installation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing balancing fixtures require the reinstallation of centering pillars and support pillars when balancing rotor disks of different sizes, which results in frequent adjustments, a large amount of operation and a long cycle. The present invention provides a balancing fixture.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] The present invention provides a balancing fixture for balancing a rotor disk. The balancing fixture includes a balancing disk, multiple support beams and multiple support columns. The multiple support beams are movable in different radial directions along the same side of the balancing disk. Each support beam is provided with a corresponding support column. The support columns are used to support and position the rotor disk.

[0006] In this solution, the balancing fixture changes the radial position of the support beam on the balancing disc to meet the support requirements of rotor discs of different sizes. This allows a single balancing fixture to balance rotor discs of varying diameters, thus achieving versatility, reducing the variety of fixtures, and lowering costs. By merging the centering support column and the support column onto the support column, there is no need to frequently change the connecting parts of different rotor discs, reducing the fixture adjustment time required for rotor disc replacement. This ensures precise centering of different rotor discs with the balancing fixture, making adjustments convenient and requiring less operation. It also avoids the risk of incorrect installation and effectively reduces the adjustment cycle of the balancing fixture.

[0007] Preferably, the balancing fixture further includes a positioning element for changing the radial position of the plurality of support beams on the balancing disc.

[0008] In this design, the radial position of the support beam on the balance disc is changed by a positioning component, which facilitates operation.

[0009] Preferably, the positioning element is located in the middle of the balance disk and can move along the axial direction of the balance disk;

[0010] The support beam has a first inclined surface at one end near the positioning member, and the positioning member is provided with a plurality of second inclined surfaces that correspond one-to-one with the first inclined surface. The first inclined surface and the second inclined surface are in contact with each other and can slide relative to each other.

[0011] When the positioning element moves along the axial direction of the balance disk, the support beam moves along the radial direction of the balance disk.

[0012] In this design, the positioning component moves axially along the balance disc, which in turn drives the support beam to move radially on the balance disc, making adjustment convenient.

[0013] Preferably, the positioning member is a disc-shaped structure, and the second inclined surface is located on the side of the positioning member away from the balance disc, and the second inclined surface is inclined upward from the outer end of the balance disc toward the middle of the balance disc.

[0014] In this solution, by adopting the above structure, the radial movement of multiple support beams can be adjusted synchronously through positioning components while ensuring the consistency of the radial movement distance of the support beams, thereby achieving precise positioning of multiple rotor discs on the balancing fixture.

[0015] Preferably, the balancing fixture further includes a driving component for driving the positioning component to move axially along the balancing disc.

[0016] Preferably, the driving component is a screw, and the positioning component has a threaded hole in the middle along the axial direction of the balance disk. The screw is threaded into the threaded hole, and the lower end of the screw passes through the bottom of the balance disk and is rotatably connected to the balance disk. The balance disk restricts the screw from axially moving.

[0017] In this solution, the rotation of the screw drives the positioning component to move along the axial direction of the balance disc, resulting in a simple, compact, and low-cost structure.

[0018] Preferably, the screw includes a threaded section and a smooth section, the outer diameter of the smooth section is smaller than that of the threaded section, the middle part of the balance disc is provided with a through hole coaxial with the threaded hole and adapted to the outer peripheral surface of the smooth section, and a limiting ring is provided at one end of the smooth section extending out of the through hole, the limiting ring being used to restrict the screw from axially moving relative to the balance disc.

[0019] In this solution, the above structure is used to prevent the screw from moving axially relative to the balance disc.

[0020] Preferably, the balance disc has a recessed portion in the middle, and the positioning member is disposed in the recessed portion.

[0021] In this design, a recess is provided in the center of the balance disc, and the positioning component can move up and down within the recess of the balance disc, increasing the axial movement range of the positioning component and thus increasing the radial support range of the balancing fixture.

[0022] Preferably, the balancing fixture further includes a guide rod, which is disposed on the balancing disc and extends along the axial direction of the balancing disc, and the positioning member is provided with a guide hole corresponding to the guide rod.

[0023] In this design, the guide rod is fixed to the balance disc and engages with the guide hole on the positioning component, allowing the positioning component to move up and down along the axis of the balance disc under the drive of the driving component.

[0024] Preferably, there are multiple guide rods.

[0025] In this solution, setting multiple guide rods ensures that the positioning component remains coaxial with the balance disc during the adjustment process, thereby achieving precise positioning of the rotor disc on the balancing fixture.

[0026] Preferably, the balancing fixture further includes a radial locking mechanism, which includes a locking screw and a locking block. The locking screw is located on one side of the support beam and extends along the moving direction of the support beam. The locking block is threadedly connected to the locking screw.

[0027] The support beam has a boss facing the locking block, and the locking block is located on the side of the boss away from the positioning member. The locking block is used to press against the boss.

[0028] In this solution, the above-mentioned structure is adopted. The locking block is connected to the locking screw through a thread, pressing the boss on the support beam to achieve radial fixation of the support beam on the balance disc, overcoming the influence of centrifugal force during the balancing process. In addition, the radial extrusion force of the locking block and the boss can be transmitted to the support beam, so that the first inclined surface on the support beam presses against the second inclined surface of the positioning component, ensuring that the first inclined surface on the support beam and the second inclined surface on the positioning component fit seamlessly, further ensuring the positioning accuracy of the rotor disc.

[0029] Preferably, the locking screw is detachably mounted to the balance disc; and / or

[0030] The balance disc is provided with lugs, and the two ends of the locking screw are respectively installed on the lugs.

[0031] The above structure is adopted in this solution, which is simple and easy to install.

[0032] Preferably, along the radial direction of the balance disc, limiting portions are provided on both sides of the support beam on the balance disc, the limiting portions being used to restrict the support beam so that the support beam moves only along the radial direction of the balance disc.

[0033] In this solution, the support beam is axially fixed on the balance disc, and the support beam is prevented from shifting, thus ensuring the safety of the balancing fixture under high-speed rotation.

[0034] Preferably, the limiting part is a limiting plate that is detachably mounted on the balance disc; and / or

[0035] The limiting part has a protrusion on the side facing the support beam, and the support beam has a groove that matches the protrusion; or, the limiting part has a groove on the side facing the support beam, and the support beam has a protrusion that matches the groove.

[0036] In this solution, the above-mentioned structure is adopted. The structure is simple and can effectively limit the axial movement and lateral displacement of the support beam.

[0037] Preferably, along the extension direction of the support beam, each support beam is provided with a plurality of support column mounting holes spaced apart.

[0038] In this solution, the above structure can be used to ensure the balance of all rotor discs within the diameter range of the balance disc, thus enhancing the versatility of the balancing tooling.

[0039] Preferably, the end of the support column away from the support beam is provided with a support platform, a centering column and a threaded part in sequence. The centering column and the threaded part are coaxial and the threaded part is located at the outer end of the support column. The centering column is adapted to the connecting hole on the mounting edge of the rotor disk. The threaded part is provided with a cap nut to press the mounting edge of the rotor disk against the support platform.

[0040] In this design, the support column adopts the aforementioned structure. The support column includes a centering column and a threaded section, serving both centering and locking functions. The centering column mates with the connecting hole on the rotor disk mounting edge. A cap nut can be installed on the threaded section of the support column to press against the rotor disk mounting edge, thus achieving a tight and fixed rotor disk. By using the cap nut to press against the rotor disk mounting edge, the concave cavity of the cap nut lowers the pressing surface, thereby negating the influence of the centering column on the support column.

[0041] The positive and progressive effects of this invention are as follows: By changing the radial position of the support beam on the balance disc, the balancing fixture of this invention can meet the support requirements of rotor discs of different sizes on the balancing fixture, so that one balancing fixture can meet the balancing requirements of rotor discs of different diameters, thereby achieving the versatility of the balancing fixture, reducing the types of fixtures, and reducing costs; by merging the centering column and the support column into the support column, there is no need to frequently change the connecting parts of different rotor discs, reducing the tooling adjustment time required for changing rotor discs, ensuring accurate centering of different rotor discs with the balancing fixture, which is not only convenient to adjust and requires less operation, but also avoids the risk of incorrect installation, effectively reducing the adjustment cycle of the balancing fixture. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a turbine rotor in the prior art.

[0043] Figure 2 This is a schematic diagram of the balancing tooling in an embodiment of the present invention.

[0044] Figure 3 yes Figure 2 A partial structural exploded view of the balancing tooling.

[0045] Figure 4 yes Figure 2 A cross-sectional schematic diagram of the balancing fixture.

[0046] Figure 5 yes Figure 2 A partial cross-sectional schematic diagram of the balancing fixture.

[0047] Figure 6 yes Figure 4 A magnified partial cross-sectional view of the balancing fixture.

[0048] Figure 7 This is a schematic diagram of the assembly of the balancing fixture and the turbine disk according to an embodiment of the present invention.

[0049] Explanation of reference numerals in the attached figures:

[0050] Turbine rotor 100

[0051] Rotor disk 110

[0052] Balance disc 200

[0053] Recess 210

[0054] Through hole 211

[0055] Guide rod 201

[0056] Limit plate 202

[0057] 203

[0058] Support beam 300

[0059] 301 convex surface

[0060] Mounting hole 302

[0061] First inclined plane 303

[0062] Support column 400

[0063] Support platform 401

[0064] Centering column 402

[0065] Threaded part 403

[0066] Positioning component 500

[0067] Second slope 501

[0068] Radial locking mechanism 600

[0069] Locking screw 601

[0070] Locking block 602

[0071] Screw 700

[0072] Threaded section 701

[0073] Smooth section 702

[0074] Limiting ring 800

[0075] Cap nut 900 Detailed Implementation

[0076] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments thereon.

[0077] like Figure 2-7As shown, this embodiment of the invention provides a balancing fixture for balancing rotor disks 110 (high-pressure turbine disks, low-pressure turbine disks, compressor disks, etc.) to meet the balancing requirements of rotor disks 110 of different sizes. The balancing fixture includes a balancing disk 200, multiple support beams 300, and multiple support columns 400. The multiple support beams 300 are movable along different radial directions on the same side of the balancing disk 200. Each support beam 300 is correspondingly provided with a support column 400, which is used to support and position the rotor disk 110.

[0078] This balancing fixture, by changing the radial position of the support beam 300 on the balancing disc 200, satisfies the support of rotor discs 110 of different sizes on the balancing fixture, enabling a single balancing fixture to balance rotor discs 110 of different diameters. This achieves the versatility of the balancing fixture, reduces the types of fixtures, and lowers costs. By merging the centering column and the support column onto the support column 400, there is no need to frequently change the connecting parts of different rotor discs 110, reducing the tooling adjustment time required for changing rotor discs 110. This ensures precise centering of different rotor discs 110 with the balancing fixture, making adjustment convenient and requiring less operation. It also avoids the risk of incorrect installation and effectively reduces the adjustment cycle of the balancing fixture.

[0079] The balancing fixture also includes a positioning element 500, which is used to change the radial position of the multiple support beams 300 on the balance disc 200. Changing the radial position of the support beams 300 on the balance disc 200 by using the positioning element 500 facilitates operation.

[0080] The positioning element 500 is located in the middle of the balance disk 200 and can move along the axial direction of the balance disk 200. The support beam 300 has a first inclined surface 303 at one end near the positioning element 500. The positioning element 500 has multiple second inclined surfaces 501 corresponding to the first inclined surface 303. The first inclined surface 303 and the second inclined surface 501 are in contact and can slide relative to each other. When the positioning element 500 moves along the axial direction of the balance disk 200, the support beam 300 moves radially along the balance disk 200. The axial movement of the positioning element 500 along the balance disk 200 drives the radial movement of the support beam 300 on the balance disk 200, facilitating adjustment.

[0081] The positioning component 500 and the support beam 300 are fitted with inclined surfaces. By changing the inclined surface contact position between the positioning component 500 and the support beam 300, the radial position of the support beam 300 on the balance disc 200 can be achieved. This makes the radial position of the support column 400 fixed on the support beam 300 variable, satisfying the balance of multiple rotor discs 110. This achieves the versatility of the balancing tooling, reduces the types of tooling, and reduces costs.

[0082] The first inclined plane 303 and the second inclined plane 501 adopt a small included angle (the included angle of the inclined planes does not exceed 30 degrees), the change of the inclined planes is relatively gentle, the radial adjustment distance is large, and the versatility of the balancing fixture is enhanced. The flatness of the first inclined plane 303 and the second inclined plane 501 is controlled within 0.005mm, so that the inclined surface mating part of the positioning part 500 and the support beam 300 can fit seamlessly, thereby realizing the precise positioning of multiple rotor disks 110 on the balancing fixture.

[0083] like Figure 2 As shown, the positioning member 500 has a disc-shaped structure. The second inclined surface 501 is located on the side of the positioning member 500 away from the balance disk 200, and the second inclined surface 501 is inclined upward from the outer end of the balance disk 200 towards the middle of the balance disk 200. The disc-shaped structure of the positioning member 500 allows for the synchronous adjustment of the radial movement of multiple support beams 300 while ensuring the consistency of the radial movement distance of the support beams 300, thereby achieving precise positioning of multiple rotor disks 110 on the balancing fixture. Of course, in other embodiments, the positioning member 500 can also adopt other similar structures, as long as it can simultaneously control the radial movement of different support beams 300; these will not be elaborated further here.

[0084] The balancing fixture also includes a drive component for driving the positioning component 500 to move axially along the balancing disk 200. In this embodiment, as... Figure 4 As shown, the driving component is a screw 700, and the positioning component 500 has a threaded hole in its middle part along the axis of the balance disk 200. The screw 700 is threaded into the threaded hole, and the lower end of the screw 700 passes through the bottom of the balance disk 200 and is rotatably connected to the balance disk 200. The balance disk 200 restricts the axial movement of the screw 700. The rotation of the screw 700 drives the positioning component 500 to move along the axis of the balance disk 200. The structure is simple, compact, and low in cost.

[0085] In this embodiment, the screw 700 includes a threaded section 701 and a smooth section 702. The outer diameter of the smooth section 702 is smaller than that of the threaded section 701. The balance disc 200 has a through hole 211 in its middle, which is coaxial with the threaded hole and adapted to the outer circumferential surface of the smooth section 702. A limiting ring 800 is provided at one end of the smooth section 702 extending out of the through hole 211. The limiting ring 800 is used to restrict the axial movement of the screw 700 relative to the balance disc 200. With the above structure, axial movement of the screw 700 relative to the balance disc 200 is avoided.

[0086] like Figure 3-5 As shown, in this embodiment, the balance disk 200 has a recessed portion 210 in the middle, and the positioning member 500 is disposed in the recessed portion 210. With the recessed portion 210 in the center of the balance disk 200, the positioning member 500 can move up and down within the recessed portion 210 of the balance disk 200, increasing the axial movement range of the positioning member 500, thereby increasing the radial support range of the balancing fixture.

[0087] like Figure 2-5 As shown, in this embodiment, the balancing fixture further includes a guide rod 201, which is disposed on the balance disk 200 and extends along the axial direction of the balance disk 200. The positioning member 500 is provided with a guide hole corresponding to the guide rod 201. The guide rod 201 is fixed on the balance disk 200 and cooperates with the guide hole on the positioning member 500, so that the positioning member 500 can move up and down along the axis of the balance disk 200 under the drive of the driving member.

[0088] There are multiple guide rods 201. The multiple guide rods 201 ensure that the positioning component 500 remains coaxial with the balance disc 200 during adjustment, thereby achieving precise positioning of the rotor disc 110 on the balancing fixture. In this embodiment, there are three guide rods 201, evenly fixed within the recess 210 along the circumference of the screw 700. The guide rods 201 can be fixed and installed by welding, snap-fitting, or threaded connection.

[0089] like Figure 2 and Figure 3 As shown, the balancing fixture also includes a radial locking mechanism 600. The radial locking mechanism 600 includes a locking screw 601 and a locking block 602. The locking screw 601 is used to adjust the radial position of the locking block 602. The locking screw 601 is located on one side of the support beam 300 and extends along the moving direction of the support beam 300. The locking block 602 is threadedly connected to the locking screw 601. The support beam 300 is provided with a boss 301 facing the locking block 602. The locking block 602 is located on the side of the boss 301 away from the positioning member 500 and is used to press against the boss 301.

[0090] With the above structure, the locking screw 601 is kept parallel to the support beam 300, and the locking block 602 is connected to the locking screw 601 by threads, pressing the boss 301 on the support beam 300 to achieve radial fixation of the support beam 300 on the balance disc 200, overcoming the influence of centrifugal force during the balancing process. In addition, the radial extrusion force of the locking block 602 and the boss 301 can be transmitted to the support beam 300, so that the first inclined surface 303 on the support beam 300 presses the second inclined surface 501 of the positioning member 500, ensuring that the first inclined surface 303 on the support beam 300 and the second inclined surface 501 on the positioning member 500 fit seamlessly, further ensuring the positioning accuracy of the rotor disc 110.

[0091] In this embodiment, the locking screw 601 is detachably mounted on the balance disc 200. The balance disc 200 has lugs 203, and both ends of the locking screw 601 are respectively mounted on the lugs 203. The locking screw 601 has a stepped shaft structure and is fixed to the lugs 203 of the balance disc 200 by retaining rings, preventing the locking screw 601 from detaching from the lugs 203. The locking screw 601 adopts the above structure, which is simple and easy to install.

[0092] In this embodiment, along the radial direction of the balance disk 200, limiting portions are provided on both sides of the support beam 300. These limiting portions restrict the support beam 300 so that it moves only radially along the balance disk 200. This structure achieves axial fixation of the support beam 300 on the balance disk 200 and prevents the support beam 300 from shifting, ensuring the safety of the balancing fixture under high-speed rotation.

[0093] The limiting part is a limiting plate 202 that is detachably mounted on the balance disc 200 and can be detached by screws. The limiting part has a protrusion on the side facing the support beam 300, and the support beam 300 has a groove that matches the protrusion. With the above structure, the structure is simple and can effectively limit the axial movement and lateral displacement of the support beam 300.

[0094] In other embodiments, the limiting portion has a groove on the side facing the support beam 300, and the support beam 300 has a protrusion that matches the groove.

[0095] Alternatively, in some embodiments, the limiting part is a guide groove extending radially along the balance disc 200, and the support beam 300 can move radially within the guide groove along the balance disc 200.

[0096] In this embodiment, each support beam 300 has only one support column 400 mounting hole 302, that is, each support beam 300 has only one support column 400.

[0097] like Figure 6 As shown, the end of the support column 400 away from the support beam 300 is sequentially provided with a support platform 401, a centering column 402, and a threaded portion 403. The centering column 402 and the threaded portion 403 are coaxial, and the threaded portion 403 is located at the outer end of the support column 400. The centering column 402 is adapted to the connecting hole on the mounting edge of the rotor disk 110. The threaded portion 403 is provided with a cap nut 900 to press the mounting edge of the rotor disk 110 against the support platform 401. The support column 400 adopts the above structure, and the support column 400 is provided with a centering column 402 and a threaded portion 403, which have both centering and locking functions. The centering column 402 is matched with the connecting hole on the mounting edge of the rotor disk 110, and the cap nut 900 can be installed on the threaded portion 403 of the support column 400 to press the mounting edge of the rotor disk 110, thereby achieving the pressing and fixing of the rotor disk 110. The mounting edge of the rotor disk 110 is pressed by a cap nut 900. The cavity of the cap nut 900 moves the pressing surface downward, thereby ignoring the influence of the centering column 402 on the support column 400.

[0098] In other embodiments, along the extending direction of the support beam 300, each support beam 300 is provided with a plurality of support column 400 mounting holes 302 at intervals. Using the above structure, the balancing fixture can satisfy the balancing of all rotor disks 110 within the diameter range of the balancing disk 200, enhancing the versatility of the balancing fixture.

[0099] like Figure 7 As shown, when using this balancing fixture, first install the assembled balancing fixture onto the balancing machine, then adjust the axial position of the positioning component 500 and the balancing disc 200 by using the screw 700, so that the selected rotor disc 110 can be installed onto the support column 400, and tighten the locking block 602 to lock the balancing fixture in its state; then install the selected rotor disc 110 onto the balancing fixture, and press the mounting edge of the rotor disc 110 with the cap nut 900 to perform static balancing on the rotor disc 110.

[0100] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A balancing fixture for balancing a rotor disk, characterized in that, The balancing fixture includes a balancing disc, multiple support beams, and multiple support columns. The multiple support beams are movable along different radial directions on the same side of the balancing disc. Each support beam is provided with a corresponding support column, which is used to support and position the rotor disc. The balancing fixture also includes a positioning element, which is used to change the radial position of the plurality of support beams on the balance disc. The positioning element is located in the middle of the balance disk and can move along the axial direction of the balance disk; The support beam has a first inclined surface at one end near the positioning member, and the positioning member is provided with a plurality of second inclined surfaces that correspond one-to-one with the first inclined surface. The first inclined surface and the second inclined surface are in contact with each other and can slide relative to each other. When the positioning element moves along the axial direction of the balance disk, the support beam moves along the radial direction of the balance disk.

2. The balancing fixture as described in claim 1, characterized in that, The positioning component is a disc-shaped structure, and the second inclined surface is located on the side of the positioning component away from the balance disc. The second inclined surface is inclined upward from the outer end of the balance disc toward the middle of the balance disc.

3. The balancing fixture as described in claim 1, characterized in that, The balancing fixture also includes a driving component, which drives the positioning component to move axially along the balancing disk.

4. The balancing fixture as described in claim 3, characterized in that, The driving component is a screw, and the positioning component has a threaded hole in the middle along the axis of the balance disk. The screw is threaded into the threaded hole, and the lower end of the screw passes through the bottom of the balance disk and is rotatably connected to the balance disk. The balance disk restricts the screw from moving axially.

5. The balancing fixture as described in claim 4, characterized in that, The screw includes a threaded section and a smooth section. The outer diameter of the smooth section is smaller than that of the threaded section. The middle part of the balance disk is provided with a through hole that is coaxial with the threaded hole and adapted to the outer peripheral surface of the smooth section. One end of the smooth section extending out of the through hole is provided with a limiting ring. The limiting ring is used to restrict the screw from axially moving relative to the balance disk.

6. The balancing fixture as described in claim 4, characterized in that, The balance disc has a recessed portion in the middle, and the positioning member is disposed in the recessed portion.

7. The balancing fixture as described in claim 3, characterized in that, The balancing fixture also includes a guide rod, which is disposed on the balancing disk and extends along the axial direction of the balancing disk. The positioning component is provided with a guide hole corresponding to the guide rod.

8. The balancing fixture as described in claim 7, characterized in that, There are multiple guide rods.

9. The balancing fixture as described in claim 1, characterized in that, The balancing fixture also includes a radial locking mechanism, which includes a locking screw and a locking block. The locking screw is located on one side of the support beam and extends along the moving direction of the support beam. The locking block is threadedly connected to the locking screw. The support beam has a boss facing the locking block, and the locking block is located on the side of the boss away from the positioning member. The locking block is used to press against the boss.

10. The balancing fixture as described in claim 9, characterized in that, The locking screw is detachably mounted to the balance disc; and / or The balance disc is provided with lugs, and the two ends of the locking screw are respectively installed on the lugs.

11. The balancing fixture as described in claim 1, characterized in that, Along the radial direction of the balance disc, limiting portions are provided on both sides of the support beam on the balance disc. The limiting portions are used to restrict the support beam so that the support beam can only move radially along the balance disc.

12. The balancing fixture as described in claim 11, characterized in that, The limiting part is a limiting plate that can be detachably installed on the balance disc; and / or The limiting part has a protrusion on the side facing the support beam, and the support beam has a groove that matches the protrusion; or, the limiting part has a groove on the side facing the support beam, and the support beam has a protrusion that matches the groove.

13. The balancing fixture as described in claim 1, characterized in that, Along the extension direction of the support beam, each support beam is provided with a plurality of support column mounting holes spaced apart.

14. The balancing fixture as described in any one of claims 1-13, characterized in that, The support column is provided with a support platform, a centering column and a threaded part in sequence at the end away from the support beam. The centering column and the threaded part are coaxial and the threaded part is located at the outer end of the support column. The centering column is adapted to the connection hole on the mounting edge of the rotor disk. The threaded part is provided with a cap nut to press the mounting edge of the rotor disk against the support platform.

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