Damping mechanism of blade and blade

Abstract

The invention discloses a damping mechanism of a blade. The damping mechanism comprises a slideway; the slide block is arranged on the slide way in a sliding manner; the bending damping piece is connected with the sliding way and the sliding block, and the sliding block slides on the sliding way in one direction to promote the bending damping piece to elastically deform, so that the kinetic energy of the sliding block and the potential energy of the bending damping piece are alternately converted in one vibration period of the blade, and therefore the blade vibration effect is improved. Furthermore, the sliding block and the sliding way are subjected to multiple times of friction, the friction time and the friction distance are increased, energy generated when the blade vibrates is fully converted into friction heat, and vibration suppression of the blade is well achieved. The invention further discloses the blade.

Description

Technical Field

[0001] This invention relates to the field of engine assembly technology, specifically to a blade damping mechanism and blade. Background Technology

[0002] Modern aero-engine rotor blades often employ a low aspect ratio design, and some larger blades are often hollow. However, this results in more pronounced blade vibration problems. Designing damping structures inside the hollow blades is an effective method to suppress blade vibration.

[0003] However, the damping effect of traditional damping structures is greatly affected by friction. Since the heat generated by friction is proportional to the friction force and sliding distance, and the traditional damping structure often only generates friction for a short period of time within one vibration cycle of the blade, the friction distance of the traditional damping structure is relatively small, resulting in an unsatisfactory vibration reduction effect. Summary of the Invention

[0004] The present invention is made to solve the above-mentioned technical problems. Its purpose is to provide a damping mechanism and blade for a blade, which can increase the friction distance in one cycle, thereby improving the shock absorption effect.

[0005] In a first aspect, the present invention discloses a blade damping mechanism, comprising: a slide rail; a slider slidably disposed on the slide rail; and a bending damping member connecting the slide rail and the slider, wherein the sliding of the slider along one direction on the slide rail causes the bending damping member to elastically deform. Thus, within one vibration cycle of the blade, the kinetic energy of the slider and the potential energy of the bending damping member are alternately converted, thereby causing multiple frictions between the slider and the slide rail, increasing the friction time and friction distance, fully converting the energy of blade vibration into frictional heat, and effectively suppressing blade vibration.

[0006] Preferably, the slider protrudes from the slide rail; the bending damping member has a first end connecting to the slider and a second end connecting to the slide rail, the heights of the first end and the second end being sequentially arranged along the protruding direction of the slider. Thus, the driving force of the bending damping member on the slider is inclined horizontally, allowing the driving force to be decomposed into a horizontal component and a vertical component. The horizontal component drives the slider's movement, while the vertical component drives the slider to fit more tightly against the slide rail. This increases the friction between the slider and the slide rail during blade vibration, improving the vibration suppression effect; furthermore, the increased tightness between the slider and the slide rail makes them less prone to separation, thereby improving the structural stability of the damping mechanism.

[0007] Preferably, the slide rail is provided with a groove, and the bending damping element includes a first damping section and a second damping section arranged sequentially along the direction away from the slider. Both the first and second damping sections are located between the first end and the second end. In the natural extension state of the bending damping element, the first damping section is located outside the groove, and the second damping section is located inside the groove. During the movement of the slider, at least a portion of the first damping section can retract into the groove, or at least a portion of the second damping section can extend outside the groove. Thus, the groove can serve as a accommodating space for part of the bending damping element. This improves the compactness of the damping mechanism and provides a certain degree of limitation and constraint on the bending damping element, allowing it to be better compressed or pulled by the slider in the sliding direction, and more effectively realizing the conversion between the kinetic energy of the slider and the potential energy of the bending damping element.

[0008] Preferably, in the natural extension state of the bending damper, the second damping section is straight, while the first damping section is curved. This simplifies the structural complexity of the damping mechanism in three ways: firstly, it allows for a larger portion of the second damping section to be accommodated in the groove, further improving the compactness of the damping mechanism; and thirdly, it enhances the limiting and constraining effect on the bending damper, thereby allowing the bending damper to be more fully subjected to the compression or traction of the slider.

[0009] Preferably, in the natural extended state of the bending damping member, the first damping segment has a first arc segment and a second arc segment arranged sequentially in a direction away from the slider, and the first arc segment and the second arc segment have different protrusion directions, in order to simplify the structure.

[0010] Preferably, the thickness of the first damping section is greater than the thickness of the second damping section. In this way, when the blade vibrates and the slider compresses and bends the damping member, the bending damping member can introduce more deformation into the part where the second damping section is located, so that the bending damping member bends evenly at each position and absorbs the kinetic energy of the slider more fully.

[0011] Preferably, the thickness of the first damping section and the thickness of the second damping section both gradually decrease in the direction away from the slider, further improving the uniformity of the bending degree change when the bending damping component is compressed.

[0012] Preferably, the thickness of the first end and the second end are both greater than or equal to the thickness of the first damping section, so that the bending damping component can be more stably and firmly connected to the slider and the slide rail.

[0013] Preferably, the slider includes a protrusion slidably disposed in the groove, and a connecting portion located outside the groove and connected to the bending damping member. In this way, a guiding engagement can be formed between the protrusion and the groove, thereby constraining the movement path of the slider and preventing the slider from deviating from its sliding direction.

[0014] Preferably, the bending damping elements are arranged in pairs along the sliding direction of the slider, and the paired bending damping elements are respectively located on two opposite sides of the slider. Thus, when the blade vibrates, one of the paired bending damping elements will increase its bending degree with the movement of the slider, while the other will decrease its bending degree. Both paired bending damping elements can provide driving force for the secondary reverse movement of the slider during the deformation recovery process, enabling the slider to move more smoothly.

[0015] Secondly, the present invention discloses a blade, including a blade body, wherein the blade body has a cavity and a damping mechanism is provided in the cavity.

[0016] Preferably, at least a portion of the slider is located on the side of the slide rail facing the tenon of the blade. This design takes into account the centrifugal force generated when the blade rotates with the rotor. By using an inverted mounting method, the slide rail can stop and support the slider, preventing the damping mechanism from disintegrating due to centrifugal force, thereby improving the stability of the blade structure.

[0017] The beneficial effects of this invention are as follows:

[0018] The damping mechanism disclosed in this invention includes: a slide rail; a slider slidably disposed on the slide rail; and a bending damping element connected to the slide rail and the slider, wherein the sliding of the slider along one direction on the slide rail causes the bending damping element to elastically deform. In this way, the bending damping element can adjust its own bending degree as the slider slides, thereby temporarily storing the kinetic energy of the slider as the potential energy of its own deformation. The specific principle is as follows:

[0019] When the engine is running, the rotor drives the blades to rotate, and the blades are prone to vibration due to the excitation of airflow. When the blades vibrate, the slider will move back and forth on the slide along the vibration direction of the blades. Through the mutual friction between the slider and the slide, the vibration energy of the blades is fully converted into frictional energy between the slider and the slide. During the sliding process of the slider, the change in the slider position will cause elastic deformation of the bending damper, thereby changing the degree of bending of the bending damper.

[0020] The slide has a first side and a second side arranged opposite to each other along its extension direction. A bending damping element can be connected to the first side and the slider, or it can be connected to the second side and the slider. Taking the bending damping element connected to the first side as an example, its bending degree changes as follows: When the slider slides towards the first side, the bending damping element undergoes elastic deformation, specifically by being compressed and increasing its bending degree. This converts the slider's kinetic energy into its own deformation potential energy for storage. Due to the stored potential energy, the bending damping element will recover its deformation and drive the slider to slide in the opposite direction a second time, causing the slider to rub against the slide again and generate heat. Similarly, when the slider slides away from the first side, the bending damping element also undergoes elastic deformation, specifically by being stretched and decreasing its bending degree. This converts the slider's kinetic energy into its own deformation potential energy for storage. Subsequently, the bending damping element recovers its deformation and drives the slider to slide in the opposite direction a second time, causing the slider to rub against the slide again and generate heat.

[0021] In this way, within one vibration cycle of the blade, the kinetic energy of the slider and the potential energy of the bending damper are alternately converted, which in turn causes multiple frictions between the slider and the slide, increasing the friction time and friction distance, fully converting the energy of the blade vibration into frictional heat, and effectively suppressing the vibration of the blade. Attached Figure Description

[0022] 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.

[0023] Figure 1 A first-view view of the damping mechanism of the present invention is shown;

[0024] Figure 2 A second perspective view of the damping mechanism of the present invention is shown;

[0025] Figure 3 A structural diagram of the blade of the present invention is shown.

[0026] Figure 4 A structural diagram of the blade of the present invention is shown;

[0027] Figure 5 It shows Figure 4 Enlarged view of the internal structure after being cut open at point I;

[0028] Figure 6 A top view of the internal structure of the blade of the present invention is shown;

[0029] Figure 7 It shows Figure 6 Enlarged view of section II.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Damping mechanism

[0032] 11-Slide,

[0033] 111-Groove,

[0034] 11a - lower side, 11b - upper side

[0035] 11c - First side, 11d - Second side

[0036] 12-Slider

[0037] 121 - Protrusion, 122 - Connecting part

[0038] 13-Bending damping components,

[0039] 13a - First end, 13b - Second end

[0040] 131-First Damping Section

[0041] 1311 - First arc segment, 1312 - Second arc segment

[0042] 132-Second Damping Section

[0043] 20-Leaf body,

[0044] 21-Cavity,

[0045] 22-Leaf wall,

[0046] 22a - leaf underside, 22b - leaf apex side,

[0047] 22c - leading edge side, 22d - trailing edge side

[0048] 30 - Tenon. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] In related technologies, hollow blades often incorporate damping structures to suppress vibration. However, the damping effect of traditional damping structures is significantly affected by friction. Since the heat generated by friction is proportional to the frictional force and sliding distance, and traditional damping structures typically generate friction only for a short period within one vibration cycle of the blade, the friction distance is relatively small, resulting in an unsatisfactory vibration reduction effect. Therefore, this invention was developed. The following describes the technical solution in conjunction with... Figures 1 to 7 To elaborate.

[0052] This invention discloses a damping mechanism 10 for a blade. The blade structure is as follows: Figures 3-5 As shown, the blade is typically a rotor blade, with a tenon 30 and a blade body 20 arranged sequentially along the height of the blade. The tenon 30 is installed in the rotor of the engine, and a cavity 21 is provided in the blade body 20. The portion of the blade body 20 surrounding the cavity 21 is the blade wall 22. A damping mechanism 10 is provided in the cavity 21 of the blade.

[0053] Figure 4 A structural diagram of the blade of the present invention is shown; Figure 5 It shows Figure 4 Enlarged view of the internal structure after being cut open at point I; Figure 6 A top view of the internal structure of the blade of the present invention is shown; Figure 7 It shows Figure 6 Enlarged view at point II. The damping mechanism 10 includes a slide 11, a slider 12, and a bending damping element 13. The slide 11 serves as the load-bearing foundation for the damping mechanism 10. The damping mechanism 10 can be connected to the blade wall 22 by means of diffusion welding or other methods. Specifically, the blade wall 22 has a back side 22a, a blade base side 22b, a leading edge side 22c, and a trailing edge side 22d. The back side 22a is located between the leading edge side 22c and the trailing edge side 22d, and the blade base side 22b is also located between the leading edge side 22c and the trailing edge side 22d. The slide 11 is welded between the back side 22a and the blade base side 22b, and the slide 11 extends along the vibration direction of the blade.

[0054] Figure 1 A first-view view of the damping mechanism of the present invention is shown; Figure 2A second-view view of the damping mechanism of the present invention is shown. The slider 12 is slidably disposed on the slide rail 11. The bending damping element 13 can be a damping spring, damping strip, etc., with curved and pleated structures. The bending damping element 13 connects the slide rail 11 and the slider 12. The sliding of the slider 12 along one direction on the slide rail 11 causes the bending damping element 13 to elastically deform. The sliding direction of the slider 12 can be understood as the extension direction of the slide rail 11, and also as the vibration direction of the blade. The elastic deformation of the bending damping element 13 can be understood as the change in the degree of bending of the bending damping element 13 as the slider 12 slides. When the blade vibrates, the elastic deformation of the bending damping element 13 can temporarily store the kinetic energy of the slider 12 as its own deformation potential energy. The specific principle is as follows:

[0055] When the engine is running, the rotor drives the blades to rotate, and the blades are prone to vibration due to the airflow. When the blades vibrate, the slider 12 will reciprocate along the vibration direction of the blades on the slide rail 11. Through the mutual friction between the slider 12 and the slide rail 11, the vibration energy of the blades is fully converted into frictional energy between the slider 12 and the slide rail 11. During the sliding process of the slider 12, the change in the position of the slider 12 will cause the elastic deformation of the bending damper 13, thereby changing the degree of bending of the bending damper 13.

[0056] The slide 11 has a first side 11c and a second side 11d. The first side 11c and the second side 11d are arranged opposite to each other along the extension direction of the slide 11. The bending damping member 13 can be connected to the first side 11c and the slider 12 respectively, and the bending damping member 13 can also be connected to the second side 11d and the slider 12 respectively. Taking the bending damping member 13 connected to the first side 11c as an example, the bending degree changes as follows: when the slider 12 slides towards the first side 11c, the bending damping member 13 undergoes elastic deformation, specifically by being compressed and increasing the degree of bending, thereby converting the kinetic energy of the slider 12 into the potential energy of its own deformation for storage. Due to the potential energy stored in the bending damping member 13, the bending damping member 13 will recover its deformation and drive the slider 12 to slide in the opposite direction for a second time, and the slider 12 will rub against the slide rail 11 again to generate heat. Similarly, when the slider 12 slides away from the first side 11c, the bending damping member 13 also undergoes elastic deformation, specifically by being stretched and decreasing the degree of bending, thereby converting the kinetic energy of the slider 12 into the potential energy of its own deformation for storage. Subsequently, the bending damping member 13 drives the slider 12 to slide in the opposite direction for a second time by recovering its deformation, and the slider 12 will rub against the slide rail 11 again to generate heat.

[0057] Thus, within one vibration cycle of the blade, the kinetic energy of the slider 12 and the potential energy of the bending damper 13 alternately transform, thereby causing multiple frictions between the slider 12 and the slide rail 11, increasing the friction time and friction distance, fully converting the energy of the blade vibration into frictional heat, and effectively suppressing the vibration of the blade.

[0058] Preferably, the materials of the slide rail 11, slider 12, and bending damping component 13 can all be titanium alloy, L605 high-temperature alloy, etc., to cope with the complex working conditions of the blade. At the same time, a wear-resistant layer can be provided on the surface of the slide rail 11 and slider 12 to improve wear resistance and thus extend service life.

[0059] Preferably, the bending damping elements 13 can be arranged in pairs along the sliding direction of the slider 12, with the pairs of bending damping elements 13 respectively located on two opposite sides of the slider 12. Specifically, one of the pairs of bending damping elements 13 is connected to the first side 11c of the slide rail 11 and the slider 12, while the other of the pairs of bending damping elements 13 is connected to the second side 11d of the slide rail 11 and the slider 12. Thus, when the blade vibrates, one of the pairs of bending damping elements 13 will increase its bending degree with the movement of the slider 12, while the other will decrease its bending degree. Both pairs of bending damping elements 13 can provide driving force for the secondary reverse movement of the slider 12 during the deformation recovery process, so that the slider 12 can move more smoothly.

[0060] In some alternative implementations, the paired bending dampers 13 can be provided in several pairs to further enhance the driving capability of the slider 12.

[0061] In some alternative embodiments, the bending damper 13 may be provided only between the first side 11c of the slide rail 11 and the slider 12, or only between the second side 11d of the slide rail 11 and the slider 12.

[0062] Preferably, the slider 12 protrudes from the slide rail 11. Specifically, the slide rail 11 can be a plate-like structure, and the connecting portion 122 of the slider 12 for connecting the bending damping member 13 is stacked on the slide rail 11. The bending damping member 13 has a first end 13a connecting the connecting portion 122 of the slider 12 and a second end 13b connecting the slide rail 11. The height of the first end 13a and the height of the second end 13b are sequentially set along the protruding direction of the slider 12. Thus, the driving force of the bending damping member 13 on the slider 12 is inclined in the horizontal direction, so the driving force can be decomposed into a horizontal component and a vertical component. The horizontal component is used to drive the slider 12 to move, while the vertical component drives the slider 12 to fit more tightly against the slide rail 11. This increases the friction between the slider 12 and the slide rail 11 when the blade vibrates, thus improving the vibration suppression effect on the blade. On the other hand, because the tightness between the slider 12 and the slide rail 11 is increased, the slider 12 and the slide rail 11 are less likely to separate, thereby improving the structural stability of the damping mechanism 10.

[0063] Preferably, the slide 11 is provided with a groove 111. The bending damping member 13 includes a first damping section 131 and a second damping section 132 arranged sequentially in the direction away from the slider 12, and the first damping section 131 and the second damping section 132 are both located between the first end 13a and the second end 13b.

[0064] When the engine is not operating, the blades are stationary, the slider 12 is in its initial position, and the bending damper 13 is in its naturally extended state. When the bending damper 13 is in its naturally extended state, the first damping section 131 is located outside the groove 111, and the second damping section 132 is located inside the groove 111.

[0065] When the engine is running, the blades move under the drive of the rotor, and the blades themselves vibrate due to airflow excitation. At this time, the slider 12 will move away from its initial position and reciprocate. During the movement of the slider 12, at least a portion of the first damping section 131 can retract into the groove 111, or at least a portion of the second damping section 132 can extend out of the groove 111. Figure 1 For example, when the slider 12 moves closer to the first side 11c, the bending damping member 13 connected to the first side 11c will increase its bending degree due to the compression of the slider 12, and at least a portion of its second damping section 132 will extend out of the groove 111; while the bending damping member 13 connected to the second side 11d will decrease its bending degree due to the traction of the slider 12, and at least a portion of its first damping section 131 will retract into the groove 111. The opposite is true when the slider 12 moves to the right, which will not be described in detail here.

[0066] It can be seen that the groove 111 can serve as a accommodating space for part of the bending damping element 13. This can improve the compactness of the damping mechanism 10 on the one hand, and limit and constrain the bending damping element 13 to a certain extent on the other hand, so that the bending damping element 13 is better compressed or pulled by the slider 12 in the sliding direction, and more effectively realize the conversion between the kinetic energy of the slider 12 and the potential energy of the bending damping element 13.

[0067] Preferably, in the natural extension state of the bending damper, the slider 12 is in the initial position, and both the first damping section 131 and the second damping section 132 can have curved portions. However, in this invention, in the natural extension state of the bending damper 13, the second damping section 132 is straight, and the first damping section 131 is curved. This simplifies the structural complexity of the damping mechanism 10 in three ways: firstly, it allows for a larger portion of the second damping section 132 to be accommodated in the groove 111, further improving the compactness of the damping mechanism 10; and thirdly, it enhances the limiting and constraining effect on the bending damper 13, thereby allowing the bending damper 13 to be more fully compressed or pulled by the slider 12.

[0068] Preferably, in the natural extension state of the bending damping member 13, the first damping segment 131 can have multiple alternating folded bends. However, in order to simplify the structure, when the slider 12 is in the initial preset position, the first damping segment 131 can be configured to have a first arc segment 1311 and a second arc segment 1312 arranged sequentially in a direction away from the slider 12. The protrusion directions of the first arc segment 1311 and the second arc segment 1312 are different. For example, the center of the first arc segment 1311 is located on the side of the first damping segment 131 facing the slider 12, while the center of the second arc segment 1312 is located on the side of the first damping segment 131 away from the slider 12.

[0069] Preferably, the thickness of the first damping section 131 is greater than the thickness of the second damping section 132. As described above, when the slider 12 is in the initial preset position, the second damping section 132 is straight and the first damping section 131 is bent. That is, the first damping section 131 has already undergone a certain degree of deformation. When the blade vibrates and causes the slider 12 to compress and bend the damping member 13, the bending damping member 13 can introduce more deformation into the part where the second damping section 132 is located, so that the bending degree of the bending damping member 13 is uniform at each position, and the kinetic energy of the slider 12 is absorbed more fully.

[0070] In some alternative implementations, the thickness of the first damping section 131 and the thickness of the second damping section 132 can be kept constant at any position, and the thickness of the first damping section 131 and the thickness of the second damping section 132 can also gradually decrease in the direction away from the slider 12, so as to further improve the uniformity of the bending degree change when the bending damping member 13 is compressed.

[0071] In some alternative embodiments, the thickness of the first damping section 131 and the thickness of the second damping section 132 may also be equal to simplify the manufacturing process.

[0072] Preferably, the thickness of the first end 13a and the second end 13b is greater than or equal to the thickness of the first damping section 131, so that the bending damping member 13 can be connected more stably and firmly with the slider 12 and the slide rail 11.

[0073] Preferably, the slider 12 includes an interconnected protrusion 121 and a connecting portion 122, the connecting portion 122 being located outside the groove 111, and the connecting portion 122... 2 The protrusion 121 is slidably disposed in the groove 111, connecting the bending damping element 13. The protrusion 121 and the groove 111 can be guided together, thereby constraining the movement path of the slider 12 and preventing the slider 12 from deviating from the sliding direction. It can be seen that the groove 111 not only participates in the positional constraint of the slider 12, but also realizes partial accommodation and limiting constraint of the bending damping element 13, thus achieving good reuse of the groove 111.

[0074] In a further embodiment, baffles may be provided on the slide rail 11. The baffles may be arranged in pairs along the width direction of the slide rail 11. The slider 12 is located between the pairs of baffles. The pairs of baffles are configured to guide and cooperate with the slider 12 along the sliding direction, further constraining the movement path of the slider 12.

[0075] In some alternative embodiments, the slider 12 may not have the protrusion 121. Specifically, the slider 12 is a rectangular slide structure, and the slider 12 is stacked on the slide rail 11.

[0076] Preferred, such as Figures 3-6 As shown, multiple damping mechanisms 10 can be provided in the blade. Specifically, multiple rows of damping mechanisms 10 can be provided along the blade height direction. Multiple rows of damping mechanisms 10 are provided along the blade width direction to further suppress the vibration effect of the blade. The blade height direction is the direction in which the tenon 30 and the blade body 20 are arranged in sequence, and the blade width direction is the direction from the leading edge side 22c to the trailing edge side 22d.

[0077] Preferably, the slide 11 has a lower side 11a and an upper side 11b disposed opposite to each other, wherein the lower side 11a is disposed toward the tenon 30, while the upper side 11b is located on the side of the slide 11 away from the tenon 30, and at least a portion of the slider 12 is disposed on the side of the slide 11 toward the blade tenon 30.

[0078] For example, the connecting part 122 of the slider 12 is located on the lower side 11a of the slide rail 11, and the protrusion 121 is provided in the groove 111; or, the slider 12 is configured as a rectangular block structure, and the entire slider 12 is provided on the lower side 11a of the slide rail 11.

[0079] These designs all enable the damping mechanism to be 10, such as Figure 5 The blade is inverted as shown. This design takes into account the centrifugal force generated when the blade rotates with the rotor. By inverting the blade, the slide rail 11 can stop and support the slider 12, preventing the damping mechanism 10 from being disintegrated by centrifugal force, thereby improving the stability of the blade structure.

[0080] This invention uses specific terms to describe embodiments of the invention. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the invention. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different places in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the invention can be appropriately combined.

[0081] 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 damping mechanism (10) for a blade, characterized in that include: Slide (11); A slider (12) is slidably disposed in the slide rail (11); A bending damping element (13) is connected to the slide rail (11) and the slider (12) respectively. The sliding of the slider (12) along one direction on the slide rail (11) causes the bending damping member (13) to elastically deform.

2. The damping mechanism (10) according to claim 1, characterized in that The slider (12) is protruding from the slide rail (11); The bending damping member (13) has a first end (13a) connected to the slider (12) and a second end (13b) connected to the slide rail (11). The height of the first end (13a) and the height of the second end (13b) are sequentially set along the protruding direction of the slider (12).

3. The damping mechanism (10) according to claim 2, characterized in that The slide (11) is provided with grooves (111), The bending damping element (13) includes a first damping section (131) and a second damping section (132) arranged sequentially along a direction away from the slider (12). The first damping section (131) and the second damping section (132) are both located between the first end (13a) and the second end (13b). In the natural extension state of the bending damper, the first damping section (131) is located outside the groove (111), and the second damping section (132) is located inside the groove (111); During the movement of the slider (12), at least a portion of the first damping section (131) can be retracted into the groove (111), or at least a portion of the second damping section (132) can extend out of the groove (111).

4. The damping mechanism (10) according to claim 3, characterized in that In the natural extended state of the bending damper (13), the second damping segment (132) is straight and the first damping segment (131) is bent.

5. The damping mechanism (10) according to claim 4, characterized in that, In the natural extended state of the bending damping member (13), the first damping segment (131) has a first arc segment (1311) and a second arc segment (1312) arranged sequentially in a direction away from the slider (12). The first arc segment (1311) and the second arc segment (1312) have different protrusion directions.

6. The damping mechanism (10) according to claim 4, characterized in that, The thickness of the first damping section (131) is greater than the thickness of the second damping section (132).

7. The damping mechanism (10) according to claim 6, characterized in that, The thickness of the first damping section (131) and the thickness of the second damping section (132) both gradually decrease in the direction away from the slider (12).

8. The damping mechanism (10) according to claim 6, characterized in that, The thickness of the first end (13a) and the second end (13b) is greater than or equal to the thickness of the first damping section (131).

9. The damping mechanism (10) according to claim 3, characterized in that, The slider (12) includes a protrusion (121) slidably disposed in the groove (111) and a connecting portion (122) located outside the groove (111) and connected to the bending damping member (13).

10. The damping mechanism (10) according to claim 1, characterized in that, The bending damping elements (13) are arranged in pairs along the sliding direction of the slider (12), and the paired bending damping elements (13) are respectively located on two opposite sides of the slider (12).

11. A leaf blade, comprising a leaf blade (20), characterized in that, The blade (20) is provided with a cavity (21), and the cavity (21) is provided with a damping mechanism (10) according to any one of claims 1 to 10.

12. The blade according to claim 11, characterized in that, At least a portion of the slider (12) is located on the side of the slide (11) facing the tenon (30) of the blade.

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