Blade vibration test device and test method

Abstract

The invention provides a blade vibration test device and test method, and the device comprises an installation seat which is used for installing a tenon of a blade; the vibration exciter is used for applying vibration to the blade on the mounting seat; and the loading device is used for applying torque and / or pulling force to the blade crown of the blade positioned on the mounting seat. It can be seen that by applying torque or tension in a blade vibration test, the vibration test can be close to a real blade working state as much as possible, obtained test data approach to real blade vibration characteristics, the influence of blade crown pre-twisting, pre-tensioning and the like on the vibration characteristics is effectively verified, and the reasonability of blade crown design is verified; and test data support is provided for blade optimization design.

Description

Technical Field

[0001] This invention relates to the field of engine testing, specifically to a blade vibration testing device and method. Background Technology

[0002] High-bypass turbine blades in aero-engines are long and thin, and operate in high-temperature, high-speed environments, resulting in significant high-cycle fatigue and necessitating vibration reduction design. Besides the structural design of the turbine blade itself, the parameters of the blade crown, including torsion angle, crown compressive stress, and contact area, also significantly influence the vibration response. Therefore, to obtain vibration characteristic data of low-pressure turbine blades under actual operating conditions, vibration characteristic tests are typically employed for verification, requiring the design of loading devices capable of simulating the actual blade operating conditions.

[0003] However, the vibration characteristic tests used in related technologies are usually conducted on single blades in a free state. They cannot simulate the effect of the pre-torsion of the blade crown on the torsional stiffness, nor do they consider the effect of centrifugal force on vibration characteristics. Therefore, they cannot simulate the real working state of the blade and cannot obtain relatively accurate test data, including natural frequency, mode shape, damping ratio, etc. Summary of the Invention

[0004] The present invention was made to solve the above-mentioned technical problems, and its purpose is to provide a blade vibration testing device and testing method that can simulate and improve the accuracy of vibration testing.

[0005] This invention discloses a blade vibration testing device, comprising: a mounting base for mounting a blade tenon; a vibrator for applying vibration to the blade located on the mounting base; and a loading device for applying torque and / or tension to the blade crown located on the mounting base.

[0006] Optionally, the loading device includes: a frame assembly including a mounting plate disposed opposite to the mounting base; and a rotating seat assembly rotatably disposed on the mounting plate, the rotating seat assembly including a torque loading head, the torque loading head being rotatable with the rotating seat assembly to apply torque to the blade crown of the blade located on the mounting base.

[0007] Optionally, the blade crown is provided with a torque loading screw hole, and the torque loading head is provided with a screw for threaded connection to the torque loading screw hole.

[0008] Optionally, a ratchet is provided around the periphery of the rotating seat assembly, and a pawl assembly is provided on the mounting plate; the pawl assembly engages with the ratchet so that the rotation direction of the rotating seat assembly is consistent with the rotation direction of the applied torque.

[0009] Optionally, the mounting plate is provided with stepped holes, which include a small-diameter hole and a large-diameter hole connected sequentially in the direction away from the mounting seat, and a pawl assembly is provided at the bottom of the large-diameter hole; the rotating seat assembly passes through the small-diameter hole, and the ratchet is engaged with the bottom of the large-diameter hole.

[0010] Optionally, the rotating seat assembly further includes a main rotating seat and a driven seat; the main rotating seat is rotatably mounted on the mounting plate, the driven seat is detachably mounted on the main rotating seat, and the torque loading head is detachably mounted on the driven seat; the main rotating seat can drive the torque loading head to rotate with the driven seat.

[0011] Optionally, the frame assembly further includes: a mounting frame, to which the mounting plate is slidably connected; and a tension adjustment assembly, which is connected to the mounting plate and the mounting frame respectively; the tension adjustment assembly is capable of applying tension to the blades located on the mounting seat through the mounting plate and the torque loading head.

[0012] Optionally, the tension adjustment assembly includes a force gauge and tension adjustment units disposed on two opposite sides of the force gauge. The tension adjustment unit on one side of the force gauge is connected to the mounting frame, and the tension adjustment unit on the other side of the force gauge is connected to the mounting plate. The tension adjustment unit is capable of applying tension to the blades located on the mounting base.

[0013] Optionally, the tension adjustment unit includes a connector and screw adjustment components on both sides of the connector; the tension adjustment unit on one side of the force gauge is connected to the mounting frame and the force gauge respectively through the two screw adjustment components; the tension adjustment unit on the other side of the force gauge is connected to the mounting plate and the force gauge respectively through the two screw adjustment components; one end of the screw adjustment component is rotatably connected to the connected object, and the other end is threadedly connected to the connected object.

[0014] Optionally, it also includes a base frame, on which the frame assembly is mounted.

[0015] Secondly, this application discloses a blade vibration testing method, applied to a vibration testing apparatus, the method comprising:

[0016] Prepare the blades and machine torque loading screw holes on the blade crowns;

[0017] Install the tenon of the blade into the mounting base;

[0018] The torque application process includes: screwing the torque loading head into the torque loading screw hole to apply torque to the blade;

[0019] Performing the excitation process includes: starting the exciter to apply vibration to the blades.

[0020] Optionally, between the torque application step and the vibration excitation step, the method further includes performing a tension application step, which includes:

[0021] Adjust the tension adjustment unit so that the tension adjustment assembly applies tension to the blades through the mounting plate and torque loading head.

[0022] The beneficial effects of this invention are as follows:

[0023] This application discloses a blade vibration testing device, comprising: a mounting base for mounting a blade tenon; a vibrator for applying vibration to the blade located on the mounting base; and a loading device for applying torque and / or tension to the blade crown located on the mounting base.

[0024] It can be seen that by applying torque or tension in the blade vibration test, the vibration test can be made as close as possible to the actual working state of the blade, and the obtained test data can be close to the actual blade vibration characteristics. This effectively verifies the influence of pre-twist and pre-tension of the blade crown on the vibration characteristics, verifies the rationality of the blade crown design, and provides test data support for the optimization design of the blade. Attached Figure Description

[0025] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0026] Figure 1 This is a diagram of the blade structure of the present invention;

[0027] Figure 2 This is a partial structural diagram of the blade of the present invention;

[0028] Figure 3 This is a structural diagram of the vibration testing device of the present invention;

[0029] Figure 4 This is a structural diagram of the loading device of the present invention;

[0030] Figure 5 This is the present invention. Figure 4 Enlarged view of point I;

[0031] Figure 6 This is a diagram showing the working state of the rotating seat assembly of the present invention;

[0032] Figure 7 This is an exploded view of the rotating seat assembly of the present invention;

[0033] Figure 8 This is an installation diagram of the rotating seat assembly of the present invention;

[0034] Figure 9 This is a plan view of the frame components of the present invention;

[0035] Figure 10 This is a diagram of the internal structure of the framework components of this invention;

[0036] Figure 11 This is the present invention. Figure 10 Enlarged view of section II.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10-blade,

[0039] 11-Tenon, 12-Blade crown, 121-Torque loading screw hole, 13-Blade body,

[0040] 20-Torque wrench

[0041] 100-Mounting base,

[0042] 200-exciter,

[0043] 300-Loading device

[0044] 310-Framework Components

[0045] 311-Mounting plate, 3111-Step hole, 3112-Slider,

[0046] 312-Pawl Assembly

[0047] 313-Mounting frame, 3131-Guide rail,

[0048] 314 - Tension adjustment assembly, 315 - Force gauge, 316 - Tension adjustment unit, 317 - Connector,

[0049] 318-Spiral Adjustment Part

[0050] 320-Rotating seat assembly

[0051] 321-Torque Loading Head

[0052] 322-Ratchet,

[0053] 323-Main rotating seat, 3231-Mounting hole, 3232-Loading hole

[0054] 324-Driven seat, 3241-Mounting boss

[0055] 400-base frame

[0056] 500 - Base. Detailed Implementation

[0057] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0058] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be construed as limiting the scope of protection of the present invention.

[0059] The following is combined Figures 1 to 11 The blade vibration testing device of this application is described.

[0060] This application discloses a blade vibration testing device, which is used to conduct vibration tests on a blade 10. The main structure of the blade 10 is... Figure 1 and Figure 2 As shown, it includes a tenon 11, a blade body 13, and a blade crown 12 arranged sequentially along its height. The blade vibration testing device is as follows: Figure 3 As shown, the device includes a base 500, a mounting base 100, a vibrator 200, and a loading device 300. The mounting base 100 and the vibrator 200 are both mounted on the base 500 and spaced apart from each other. The mounting base 100, the vibrator 200, and the base 500 form an integral structure, which improves the integration of the device in this application.

[0061] The mounting base 100 is used to mount the tenon 11 of the blade 10; the contact of the vibrator 200 contacts the blade body 13 of the blade 10 to apply vibration to the blade 10 located in the mounting base 100, thereby obtaining vibration characteristic data of the blade 10; the loading device 300 is used to apply torque and / or tension to the blade crown 12 of the blade 10 located in the mounting base 100, such as applying only torque, or only tension, or applying both torque and tension simultaneously. Applying torque to the blade crown 12 can simulate the effect of the extrusion pressure on the rigidity of the blade 10 under installed conditions, while applying tension at the blade crown 12 can simulate the effect of centrifugal force on the vibration characteristics of the blade 10 under actual working conditions.

[0062] It can be seen that by applying torque or tension in the blade vibration test, the vibration test can be made as close as possible to the actual working state of the blade 10, and the obtained test data is close to the actual vibration characteristics of the blade 10. This effectively verifies the influence of pre-torsion and pre-tension of the blade crown 12 on the vibration characteristics, verifies the rationality of the crown design of the blade 10, and provides test data support for the optimized design of the blade 10.

[0063] Optionally, such as Figure 3 , Figure 4 and Figure 10 As shown, the loading device 300 includes a frame assembly 310 and a rotating seat assembly 320. The frame assembly 310 includes a mounting plate 311, which is suspended above the mounting seat 100 and is disposed opposite to the mounting seat 100.

[0064] The rotating seat assembly 320 is rotatably mounted on the mounting plate 311. The rotating seat assembly 320 includes a torque loading head 321, which can rotate with the rotating seat assembly 320 to apply torque to the blade crown 12 of the blade 10 located in the mounting seat 100, so that the vibration test closely approximates the actual working state of the blade 10.

[0065] Optionally, regarding the specific structure of the torque loading head 321, the torque loading head 321 can be a clamping plate for holding the blade crown 12, thereby applying torque to the blade crown 12 when the rotating seat assembly 320 rotates; or, the torque loading head 321 can abut against the blade crown 12 contact, thereby applying torque to the blade crown 12 when the rotating seat assembly 320 rotates through the friction generated by the abutment; or, the torque loading head 321 can be a magnetic element, applying magnetic force to the blade basin side and / or blade back side of the blade 10, thereby applying torque to the blade crown 12 when the rotating seat assembly 320 rotates, or any other structure capable of applying torque to the blade crown 12. The torque loading head 321 of this application adopts the following structure:

[0066] Leaf crown 12 setting of leaf 10 Figure 2 The torque loading screw hole 121 shown indicates that the blade 10 tested by the device in this application is a dedicated test blade. It can be modified from a blade that has been repaired or scrapped from the engine. The modification method is to form the torque loading screw hole 121 located on the blade crown 12 by drilling, tapping and other methods, and then carry out subsequent vibration tests.

[0067] like Figure 3 , Figure 6 and Figure 7 As shown, the torque loading head 321 is equipped with a screw. The torque loading head 321 can be a bolt or a modified bolt. The torque loading head 321 is threadedly connected to the torque loading screw hole 121 via the screw. During the test, the torque loading head 321 is first screwed into the torque loading screw hole 121 until it is fully inserted. Then, a torque is continuously applied to the rotating seat assembly 320. The rotation direction of the applied torque is consistent with the screwing direction of the torque loading head 321. Because the threaded connection makes the torque loading head 321 and the blade 10 a stable integral structure, the torque is effectively transmitted to the blade 10 through the torque loading head 321, thereby applying the corresponding torque to the blade 10.

[0068] Optionally, such as Figures 8-10As shown, a ratchet 322 is provided around the periphery of the rotating seat assembly 320, and a pawl assembly 312 is provided on the mounting plate 311. The pawl assembly 312 engages with the ratchet 322 so that the rotation direction of the rotating seat assembly 320 is consistent with the rotation direction of the applied torque. That is, the pawl assembly 312 and the ratchet 322 together constitute a ratchet mechanism to control the unidirectional rotation of the rotating seat assembly 320.

[0069] Specifically, the clockwise rotation direction of the rotating seat assembly 320 is set to the direction in which the torque loading head 321 screws into the torque loading screw hole 121. The pawl of the pawl assembly 312 extends into the tooth groove of the ratchet 322. When the ratchet 322 rotates clockwise with the rotating seat assembly 320, the pawl slides on the back of the teeth of the ratchet 322, and the rotation of the rotating seat assembly 320 is unimpeded. When the ratchet 322 rotates counterclockwise with the rotating seat assembly 320, the pawl will brake the rotating seat assembly 320 to rotate. In summary, by setting the ratchet mechanism, the rotating seat assembly 320 can be controlled to rotate only in the direction of torque application, thereby ensuring that the torque applied to the blade 10 is reliable and effective, and can remain fixed during the test.

[0070] Optionally, the pawl assemblies 312 are arranged in pairs and symmetrically on both sides of the ratchet 322 to improve the control effect on the unidirectional rotation of the rotating seat assembly 320.

[0071] Optionally, such as Figure 9 and Figure 10 As shown, the mounting plate 311 is provided with a stepped hole 3111, which includes a small-diameter hole and a large-diameter hole connected sequentially in a direction away from the mounting base 100. A pawl assembly 312 is provided at the bottom of the large-diameter hole of the stepped hole 3111. The rotating base assembly 320 passes through the small-diameter hole of the stepped hole 3111, and the ratchet 322 overlaps at the bottom of the large-diameter hole of the stepped hole 3111. Thus, in the first aspect, the step hole 3111 provides for the accommodation of the ratchet 322 and the pawl assembly 312, improving the integration of the device of this application. In the second aspect, the ratchet 322 can both control the rotation direction of the rotating base assembly 320 and be used for the installation and positioning of the rotating base assembly 320, achieving reuse.

[0072] Optionally, such as Figures 6-8 As shown, the rotating seat assembly 320 also includes a main rotating seat 323 and a driven seat 324, with a ratchet 322 disposed on the outer periphery of the main rotating seat 323.

[0073] The main rotating seat 323 is rotatably mounted on the mounting plate 311. A loading hole 3232 is pre-drilled at the end of the main rotating seat 323 facing away from the mounting base 100. The loading hole 3232 is used to install the torque head of the torque wrench 20. A mounting hole 3231 is pre-drilled at the end of the main rotating seat 323 facing the mounting base 100. The driven seat 324 is detachably mounted on the main rotating seat 323, and the torque loading head 321 is detachably mounted on the driven seat 324. A mounting boss 3241 is provided around the periphery of the driven seat 324. During installation, the torque loading head 321 and the driven seat 324 are first assembled as a single unit. Then, the driven seat 324, along with its mounting boss 3241, is inserted into the mounting hole 3231. After rotating a certain angle, the mounting boss 3241 is engaged in the slot within the mounting hole 3231, thus connecting the main rotating seat 323, the driven seat 324, and the torque loading head 321 as a single unit. In this way, the main rotating seat 323 can drive the torque loading head 321 to rotate with the driven seat 324, thereby applying torque to the blade 10. This detachable structure of the rotating seat assembly 320 facilitates maintenance and replacement.

[0074] Optionally, such as Figure 3 and Figure 4 As shown, the frame assembly 310 also includes a mounting frame 313 and a tension adjustment assembly 314. The mounting frame 313 includes a top plate and side plates located at both ends of the top plate. The two ends of the mounting plate 311 are slidably connected to the two side plates of the mounting frame 313 in a corresponding manner. For example, the frame assembly 310 is also provided with two sliders 3112. The side plates of the mounting frame 313 are provided with guide rails 3131. The two sliders 3112 and the two guide rails 3131 are slidably connected in a corresponding manner. At the same time, the mounting plate 311 is located between the two guide rails 3131, and the two opposite ends of the mounting plate 311 are connected to the two sliders 3112 in a corresponding manner.

[0075] The tension adjustment component 314 is connected to the top plate of the mounting plate 311 and the mounting frame 313 respectively. The tension adjustment component 314 is a component that can extend or retract, or a component that can generate tensile deformation. In this way, the tension adjustment component 314 can drive the mounting plate 311 to move away from the mounting seat 100. Then, the mounting plate 311 and the torque loading head 321 can apply tension to the blade 10 in the mounting seat 100 to simulate the influence of centrifugal force on the vibration characteristics of the blade 10 under real working conditions.

[0076] Optionally, multiple tension adjustment components 314 can be provided, such as in pairs, so that tension can be applied from multiple points on the mounting plate 311 to transmit a more balanced tension through the mounting plate 311 and the torque loading head 321 to the blade 10.

[0077] Optionally, such as Figure 4As shown, the tension adjustment assembly 314 includes a force gauge 315 and a tension adjustment unit 316, with one tension adjustment unit 316 on each of two opposite sides of the force gauge 315. The tension adjustment unit 316 on one side of the force gauge 315 is connected to the mounting frame 313, and the tension adjustment unit 316 on the other side of the force gauge 315 is connected to the mounting plate 311. The tension adjustment unit 316 can apply tension to the blade 10 located on the mounting base 100. The force gauge 315 is used to detect the magnitude of the tension generated by the tension adjustment unit 316, thereby controlling the magnitude of the tension applied to the blade 10 and improving the test accuracy.

[0078] Optionally, such as Figure 4 and Figure 5 As shown, the tension adjustment unit 316 includes a connector 317 and a spiral adjustment member 318 disposed on both sides of the connector 317. For example, the connector 317 is a rope and the spiral adjustment member 318 is a tie bolt.

[0079] Among them, the tension adjustment unit 316 on one side of the force gauge 315 is connected to the mounting frame 313 and the force gauge 315 respectively through two screw adjustment parts 318; the tension adjustment unit 316 on the other side of the force gauge 315 is connected to the mounting plate 311 and the force gauge 315 respectively through two screw adjustment parts 318; one end of the screw adjustment part 318 is rotatably connected to the connected object, and the other end is threadedly connected to the connected object.

[0080] For example, the screw adjustment component 318 and the connector 317 are rotatably connected, and are threadedly connected to the mounting plate 311, the force gauge 315, and the mounting frame 313; or the screw adjustment component 318 and the connector 317 are threadedly connected, and are rotatably connected to the mounting plate 311, the force gauge 315, and the mounting frame 313.

[0081] Thus, by rotating the spiral adjusting member 318, the tension applied by the spiral adjusting member 318 to the connecting member 317 can be adjusted, thereby changing the tension transmitted from the connecting member 317 to the blade 10, making tension adjustment convenient.

[0082] Optionally, such as Figure 3 As shown, the blade vibration test device also includes a base frame 400, which is a gantry structure, and the frame assembly 310 is installed on the base frame 400.

[0083] This application also discloses a blade vibration testing method, applied to the aforementioned vibration testing apparatus, the testing method comprising:

[0084] Step S100: Prepare blade 10 and machine torque loading screw hole 121 on the blade crown 12 of blade 10. Torque loading screw hole 121 is located on the end face of blade crown 12 away from tenon 11.

[0085] Step S200: Install the tenon 11 of the blade 10 into the mounting base 100;

[0086] Step S300: Adjust the contact of the vibrator 200 to contact the blade body 13 of the blade 10;

[0087] Step S400: Pre-positioning torque loading head 321, specifically: pre-screw the torque loading head 321 into the torque loading screw hole 121 by 2 to 3 screw pitches, or directly screw the torque loading head 321 into the torque loading screw hole 121 to the bottom. At this time, the pre-positioning of the torque loading head 321 is completed, so that the relative position between the torque loading head 321 and the blade 10 is fixed.

[0088] Step S500: Perform the torque application process, including:

[0089] Step S510: Set a torque threshold in the torque wrench 20, which is the torque that needs to be applied to the blade 10;

[0090] Step S520: Insert the torque contact of the torque wrench 20 into the loading hole 3232 of the main rotating seat 323, and then rotate the torque wrench 20 to control the main rotating seat 323 and the driven seat 324 to drive the torque loading head 321 to continue to screw into the torque loading screw hole 121 to apply torque to the blade 10.

[0091] Step S530: When the torque reaches the torque threshold, stop rotating the torque wrench 20; in this way, the magnitude of the torque applied to the blade 10 can be controlled by the torque wrench 20.

[0092] Step S600: Perform the tensile force application process, including:

[0093] Step S610: Set the tension threshold for the force gauge 315. The tension threshold is the tension value that needs to be applied to the blade 10.

[0094] Step S620: Adjust the tension adjustment unit 316 so that the tension adjustment assembly 314 applies tension to the blade 10 through the mounting plate 311 and the torque loading head 321. Specifically, rotate any one or more screw adjustment parts 318 on the tension adjustment assembly 314 to generate tension on the force gauge 315 through the connector 317. At the same time, transmit the tension to the blade through the connector 317, mounting plate 311, main rotating seat 323, driven seat 324 and torque loading head 321 to apply tension to the blade 10.

[0095] Step S630: Stop applying tension when the tension on the force gauge 315 reaches the tension threshold. In this way, the magnitude of the tension applied to the blade 10 can be controlled by the force gauge 315.

[0096] Step S700: Perform the excitation process, including: starting the vibrator 200 to apply vibration to the blade 10.

[0097] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A blade vibration testing device, characterized in that, include: Mounting base (100), tenon (11) for mounting blade (10); A vibrator (200) is used to apply vibration to the blades (10) located on the mounting base (100); A loading device (300) is used to apply torque and / or tension to the blade crown (12) of the blade (10) located in the mounting base (100).

2. The blade vibration testing device according to claim 1, characterized in that, The loading device (300) includes: The frame assembly (310) includes a mounting plate (311) disposed opposite to the mounting base (100); A rotating seat assembly (320) is rotatably disposed on the mounting plate (311), the rotating seat assembly (320) including a torque loading head (321) which is rotatable with the rotating seat assembly (320) to apply torque to the blade crown (12) of the blade (10) located on the mounting base (100).

3. The blade vibration testing device according to claim 2, characterized in that, The blade (10) has a torque loading screw hole (121) on its crown (12). The torque loading head (321) is provided with a screw for threaded connection to the torque loading screw hole (121).

4. The blade vibration testing device according to claim 2, characterized in that, The rotating seat assembly (320) is provided with a ratchet (322) on its periphery, and the mounting plate (311) is provided with a pawl assembly (312); The pawl assembly (312) engages the ratchet (322) so that the rotation direction of the rotating seat assembly (320) is consistent with the rotation direction of the applied torque.

5. The blade vibration testing device according to claim 4, characterized in that, The mounting plate (311) is provided with a stepped hole (3111), the stepped hole (3111) includes a small diameter hole and a large diameter hole connected sequentially in a direction away from the mounting base (100), and the pawl assembly (312) is provided at the bottom of the large diameter hole; The rotating seat assembly (320) passes through the small-diameter hole, and the ratchet (322) rests on the bottom of the large-diameter hole.

6. The blade vibration testing apparatus according to claim 2, characterized in that, The rotating seat assembly (320) further includes a main rotating seat (323) and a driven seat (324); The main rotating seat (323) is rotatably mounted on the mounting plate (311), the driven seat (324) is detachably mounted on the main rotating seat (323), and the torque loading head (321) is detachably mounted on the driven seat (324). The main rotating seat (323) can drive the torque loading head (321) to rotate with the driven seat (324).

7. The blade vibration testing apparatus according to claim 3, characterized in that, The frame component (310) also includes: Mounting frame (313), wherein the mounting plate (311) is slidably connected to the mounting frame (313); A tension adjustment assembly (314) is connected to the mounting plate (311) and the mounting frame (313) respectively; The tension adjustment assembly (314) can apply tension to the blade (10) located on the mounting base (100) via the mounting plate (311) and the torque loading head (321).

8. The blade vibration testing apparatus according to claim 7, characterized in that, The tension adjustment assembly (314) includes a force gauge (315) and tension adjustment units (316) disposed on two opposite sides of the force gauge (315). The tension adjustment unit (316) located on one side of the force gauge (315) is connected to the mounting frame (313), and the tension adjustment unit (316) located on the other side of the force gauge (315) is connected to the mounting plate (311); The tension adjustment unit (316) is capable of applying tension to the blade (10) located in the mounting base (100).

9. The blade vibration testing apparatus according to claim 8, characterized in that, The tension adjustment unit (316) includes a connector (317) and a spiral adjustment component (318) disposed on both sides of the connector (317); The tension adjustment unit (316) located on one side of the force gauge (315) is connected to the mounting frame (313) and the force gauge (315) respectively through two screw adjustment parts (318); The tension adjustment unit (316) located on the other side of the force gauge (315) is connected to the mounting plate (311) and the force gauge (315) respectively through two screw adjustment parts (318); One end of the spiral adjusting member (318) is rotatably connected to the object to which it is connected, and the other end is threadedly connected to the object to which it is connected.

10. The blade vibration testing apparatus according to claim 2, characterized in that, It also includes a base frame (400), on which the frame assembly (310) is mounted.

11. A blade vibration testing method, applied to the vibration testing apparatus of claim 8, characterized in that, The method includes: Prepare blades (10) and machine torque loading screw holes (121) on the blade crown (12) of the blades (10); Install the tenon (11) of the blade (10) into the mounting base (100); The torque application process includes: screwing the torque loading head (321) into the torque loading screw hole (121) to apply torque to the blade (10); Performing the excitation process includes: activating the exciter (200) to apply vibration to the blade (10).

12. The blade vibration test method according to claim 11, characterized in that, Between the torque application step and the vibration excitation step, the method further includes performing a tension application step, which includes: The tension adjustment unit (316) is adjusted so that the tension adjustment assembly (314) applies tension to the blade (10) through the mounting plate (311) and the torque loading head (321).

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