Damping-adjustable torsional vibration absorber and damping adjusting method thereof

Abstract

The invention relates to the technical field of vibration control, and discloses a damping-adjustable torsional vibration absorber and a damping adjusting method thereof.The damping-adjustable torsional vibration absorber structurally comprises a threaded rod, a nut, a friction plate, a buffering and damping ring set and a bottom plate; the bottom plate is arranged on the rotating shaft, one end of the threaded rod is fixed to the bottom plate, and the buffering vibration reduction ring is arranged on the threaded rod in a sleeving mode and fixed to the bottom plate; the friction plate is arranged on the threaded rod in a sleeving manner, is in key connection with the threaded rod, and is propped against the buffering and damping ring; the nut is in threaded connection with the threaded rod, abuts against the friction plate and is used for providing pre-pressure for the friction plate and the buffering vibration reduction ring and adjusting damping of the vibration absorber. By rotating the position of the nut on the threaded rod, the pre-pressure of the nut on the friction plate can be conveniently adjusted. The adjustment of the pre-pressure directly affects the friction force between the friction plate and the buffer damping ring, so that the damping adjustment of the vibration absorber is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control, and specifically provides a damping adjustable torsional vibration absorber and a damping adjustment method therefor. Background Art

[0002] In a rotating machinery system, torsional vibration is a common physical phenomenon, especially prominent in core mechanical transmission components such as engines and transmissions. During the operation of these components, due to the periodic fluctuation of torque, strong torsional vibration is easily induced. This vibration not only has an adverse effect on the overall operation efficiency of the system, resulting in increased energy loss, but also accelerates the wear of key components and shortens the service life of the equipment. More seriously, long-term torsional vibration may also cause noise pollution and mechanical structure damage, posing a major threat to the stability and safety of the equipment.

[0003] In response to these problems caused by torsional vibration, the industry has developed various torsional vibration absorbers to mitigate their negative impacts. However, most of the torsional vibration absorbers widely used in the market currently adopt a design with a fixed damping structure. This design principle is relatively simple and can alleviate the impact and vibration caused by torsional vibration to a certain extent, but its inherent limitations are becoming increasingly prominent. Since the damping value of the fixed damping structure cannot be adjusted, in practical applications, it is difficult for such absorbers to adapt to complex and variable load conditions. Different load environments have different performance requirements for torsional vibration absorbers, and the fixed damping structure cannot be flexibly adjusted according to actual needs, resulting in significant differences in the vibration suppression effect under different load environments.

[0004] Especially in some application scenarios that are sensitive to vibration or require high-precision operation, torsional vibration absorbers with a fixed damping structure often cannot meet the actual needs. Therefore, how to design a torsional vibration absorption device with a simple structure, easy implementation, and adjustable damping to meet the vibration suppression requirements under different load conditions has become an urgent technical problem to be solved. Summary of the Invention

[0005] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the present invention is to provide a damping adjustable torsional vibration absorber and a damping adjustment method therefor, so as to solve the technical problem that the damping of the torsional vibration absorber in the prior art cannot be flexibly adjusted.

[0006] The present invention is realized through the following technical solutions: In the first aspect, the present invention provides a damping adjustable torsional vibration absorber, including a threaded rod, a nut, a friction plate, a buffer damping ring group, and a bottom plate; The bottom plate is arranged on the rotating shaft. One end of the threaded rod is fixed on the bottom plate. The buffer damping ring is sleeved on the threaded rod and fixed on the bottom plate. The friction plate is sleeved on the threaded rod, key-connected to the threaded rod, and abuts against the buffer damping ring. The nut is threadedly connected to the threaded rod and abuts against the friction plate to provide a pre-pressure to the friction plate and the buffer damping ring, and adjust the damping of the vibration absorber.

[0007] Preferably, the buffer damping ring includes a mass ring and a rubber ring. The rubber ring is sleeved on the threaded rod and fixed on the bottom plate. The mass ring is sleeved on the threaded rod and fixed on the rubber ring.

[0008] Furthermore, the mass ring is made of metal to provide inertial mass to absorb and offset the vibration energy generated by torsional vibration.

[0009] Preferably, the rod body of the threaded rod is perpendicular to the plate surface of the bottom plate, and the threaded rod is fixedly connected to the bottom plate by welding or threaded connection.

[0010] Preferably, the friction plate and the buffer damping ring group are coaxially arranged.

[0011] Preferably, the friction plate is made of wear-resistant material to enhance the friction damping.

[0012] Preferably, the friction plate and the buffer damping ring are in plane contact.

[0013] In a second aspect, the present invention also provides a damping adjustment method for a damping adjustable torsional vibration absorber. Based on the above-mentioned damping adjustable torsional vibration absorber, it includes the following processes: When the rotating shaft undergoes torsional vibration, the vibration energy generates corresponding torsional vibration through the bottom plate and the buffer damping ring. The buffer damping ring applies an anti-phase torsional inertia moment and dissipates the vibration energy through the frictional force with the friction plate. Adjust the nut to control the frictional pressure between the friction plate and the buffer damping ring, and then obtain the optimal damping coefficient. Calculate the required pre-pressure according to the optimal damping coefficient. According to the relationship between the tightening torque of the nut and the pre-pressure, tighten the nut to complete the damping adjustment of the damping adjustable torsional vibration absorber.

[0014] Preferably, in the process of adjusting the nut to control the frictional pressure between the friction plate and the buffer damping ring, the specific adjustment process is as follows: By increasing the tightening torque of the nut, increase the pre-pressure of the friction plate, thereby increasing the friction damping. On the contrary, reducing the tightening torque of the nut will reduce the pre-pressure of the friction plate and reduce the system damping.

[0015] Preferably, the calculation formula for the pre-pressure is as follows:

[0016] Among them, C eq is the optimal damping coefficient; α 0 is the angular displacement amplitude; μ is the friction coefficient; r 0 is the outer diameter of the friction plate; r i is the inner diameter of the friction plate.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a damping adjustable torsional vibration absorber. By rotating the position of the nut on the threaded rod, the pre-pressure of the nut on the friction plate can be conveniently adjusted. This adjustment of the pre-pressure directly affects the frictional force between the friction plate and the buffer damping ring, thereby realizing the adjustment of the damping of the absorber. This design enables the absorber to adapt to different vibration environments and requirements, improving its application range and flexibility. The present invention can flexibly control the pre-tightening force of the friction plate by adjusting the tightening torque of the nut, and then adjust the damping coefficient, with simple operation, high precision, and strong adaptability.

[0018] Furthermore, the rubber ring, as the main elastic element, has excellent vibration absorption and buffering performance. It can effectively absorb and disperse the torsional vibration energy transmitted by the rotating shaft, reducing the influence of vibration on the system. The addition of the mass ring increases the overall mass of the buffer damping ring. According to the principle of vibration control, increasing the mass helps to enhance the damping effect of the system and strengthen the vibration damping effect of the absorber. The combined use of the mass ring 4 and the rubber ring 5 forms a relatively stable structure. The mass ring 4 provides additional inertial force, which helps to stabilize the deformation of the rubber ring 5 and prevent the excessive deformation or damage of the rubber ring 5 under extreme vibration conditions. At the same time, this combined structure also enhances the overall structural stability of the absorber, enabling it to maintain good performance during long-term use.

[0019] Even further, the mass ring made of metal has a high density and stable physical properties, and can provide sufficient inertial mass. During torsional vibration, the inertial effect of the mass ring can effectively absorb and offset the vibration energy, reducing the influence of vibration on the system. The metal mass ring has excellent mechanical properties and durability, and can withstand large stresses and deformations. This helps to maintain the stability and reliability of the overall structure of the absorber and prevent damage or failure under extreme vibration conditions.

[0020] Furthermore, the threaded rod is vertically arranged with the bottom plate, ensuring the stability and reliability of the absorber when installed on the rotating shaft. This vertical layout reduces the additional stress on the vibration transmission path caused by improper installation angle, and helps to improve the durability and service life of the absorber.

[0021] Further, the friction plate and the buffer damping ring group are coaxially arranged. The coaxial arrangement ensures the precise alignment of the friction plate and the buffer damping ring group on the rotating shaft. This alignment reduces the additional stress on the vibration transmission path caused by installation deviation, enabling the vibration energy to be more effectively absorbed and dispersed by the friction plate and the buffer damping ring group, which helps to maximize the vibration damping effect of the vibration absorber.

[0022] Further, the material of the friction plate is a wear-resistant material for enhancing the friction damping. The wear-resistant material has a high friction coefficient and wear resistance, which can ensure the stable friction performance of the friction plate during long-term use. This stable friction performance helps to enhance the friction damping effect of the vibration absorber, enabling the vibration energy to be more effectively absorbed and dispersed.

[0023] Further, the friction plate and the buffer damping ring are in planar contact. The planar contact ensures the stable contact between the friction plate and the buffer damping ring during vibration. This stable contact reduces the damping force fluctuation caused by the change of the contact area, enabling the vibration absorber to provide a more stable and consistent vibration damping effect.

[0024] The present invention also provides a damping adjustment method for a damping adjustable torsional vibration absorber. By adjusting the nut to control the friction pressure between the friction plate and the buffer damping ring, the damping coefficient of the vibration absorber can be conveniently adjusted. This adjustability enables the vibration absorber to adapt to different vibration conditions and load environments, optimizing the vibration damping effect. The present invention calculates the required pre-pressure and tightens the nut according to the relationship between the nut tightening torque and the pre-pressure. This precise calculation and adjustment process ensure that the vibration absorber can achieve the best vibration damping effect in practical applications.

[0025] Further, by precisely adjusting the tightening torque of the nut, precise control of the pre-pressure of the friction plate can be achieved, thereby achieving precise adjustment of the friction damping. This precise control helps to optimize the vibration damping performance of the vibration absorber, enabling it to achieve the best vibration damping effect under different working conditions. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the damping adjustable torsional vibration absorber in an embodiment of the present invention; Figure 2 is a front view of the damping adjustable torsional vibration absorber in an embodiment of the present invention; In the figure: 1, threaded rod; 2, nut; 3, friction plate; 4, mass ring; 5, rubber ring; 6, bottom plate. Detailed Embodiments

[0027] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solution in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] The object of the present invention is to provide a damping adjustable torsional vibration absorber and its damping adjustment method to solve the technical problem that the torsional vibration absorber in the prior art cannot flexibly adjust the damping.

[0029] The following will further describe the present invention in detail with reference to the accompanying drawings: Embodiment 1 Refer to Figure 1 , in an embodiment of the present invention, a damping adjustable torsional vibration absorber is provided, including a threaded rod 1, a nut 2, a friction plate 3, a buffer damping ring group, and a bottom plate 6; the bottom plate 6 is arranged on the rotating shaft, one end of the threaded rod 1 is fixed on the bottom plate 6, the buffer damping ring is sleeved on the threaded rod 1 and fixed on the bottom plate 6; the friction plate 3 is sleeved on the threaded rod 1, key-connected with the threaded rod 1, and abuts against the buffer damping ring; the nut 2 is threadedly connected to the threaded rod 1 and abuts against the friction plate 3 for providing a pre-pressure to the friction plate 3 and the buffer damping ring to adjust the damping of the absorber.

[0030] Specifically, the buffer damping ring includes a mass ring 4 and a rubber ring 5; the rubber ring 5 is sleeved on the threaded rod 1 and fixed on the bottom plate 6; the mass ring 4 is sleeved on the threaded rod 1 and fixed on the rubber ring 5.

[0031] In this embodiment, when the rotating shaft undergoes torsional vibration, the vibration energy is transmitted to the rubber ring 5 through the bottom plate 6. The rubber ring 5 utilizes its high elasticity and damping characteristics to effectively absorb part of the vibration energy and dissipate it in the form of heat energy or other forms of energy.

[0032] Among them, the mass ring 4 is made of metal and is used to provide inertial mass to absorb and offset the vibration energy generated by torsional vibration.

[0033] Specifically, the rod body of the threaded rod 1 is perpendicular to the plate surface of the bottom plate 6, and the threaded rod 1 is fixedly connected to the bottom plate 6 by welding or threaded connection.

[0034] In this embodiment, when the rotating shaft undergoes torsional vibration, the vibration energy is transmitted to the bottom plate 6 through the threaded rod 1.

[0035] Since the connection between the threaded rod 1 and the base plate 6 is rigid (whether welded or threaded), the vibration energy can be efficiently transmitted to the entire vibration absorber system. During the vibration process, the threaded rod 1 and the base plate 6 participate in the vibration as a whole, and cooperate with other components (such as the buffer vibration damping ring, friction plate 3, etc.) to dissipate the vibration energy together. Through the elastic deformation and recovery of the buffer vibration damping ring, and the friction between the friction plate 3 and the buffer vibration damping ring, the vibration energy is gradually converted into heat energy or other forms of energy dissipation. For the threaded connection of the threaded rod 1 and the base plate 6, the stiffness and damping characteristics of the connection can be changed by adjusting the tightening degree of the thread. This allows the vibration absorber to maintain the best vibration reduction effect under different vibration conditions according to actual needs.

[0036] Specifically, the friction plate 3 and the buffer vibration damping ring group are coaxially arranged, which means that the center lines of the friction plate 3 and the buffer vibration damping ring group coincide, which helps to maintain the stability of the system during vibration. When the rotating shaft undergoes torsional vibration, the coaxially arranged friction plate 3 and the buffer vibration damping ring group can more effectively resist the deviation and shaking caused by the vibration, thereby ensuring the normal operation of the system.

[0037] Specifically, the friction plate 3 is made of a wear-resistant material to enhance friction damping. The friction plate 3 is a key component in the damping adjustable torsional vibration absorber, and the selection of its material is directly related to the performance and life of the absorber. Wear-resistant materials, such as molybdenum alloy, carbon fiber, semi-metallic composite materials, etc., are widely used in the manufacture of the friction plate 3 due to their high hardness, wear resistance, high temperature resistance and other characteristics. These materials can effectively resist wear and corrosion during vibration, thereby maintaining the stability and durability of the friction coefficient.

[0038] Specifically, the friction plate 3 and the buffer vibration damping ring are in planar contact, which makes the contact area between the friction plate 3 and the buffer vibration damping ring larger and the contact more uniform, which helps to maintain a stable contact state during the vibration process and reduce the vibration energy transmission loss caused by poor contact.

[0039] In this embodiment, one end of the threaded rod 1 is fixed to the base plate 6. The base plate 6 is mechanically connected, such as by threading, welding, etc., to firmly mount the vibration absorber on the vibration source to ensure its stable operation. The upper part of the threaded rod 1 cooperates with the tightening nut 2 to adjust the pressure between the friction plate 3 and the mass ring 4. The tightening nut 2 is threadedly connected to the threaded rod 1. By rotating to tighten or loosen the nut 2, the contact pressure between the friction plate 3 and the mass ring 4 can be changed. Through this structure, precise control of friction damping can be achieved, and then the damping adjustment of the torsional vibration absorber can be achieved. The greater the degree of tightening, the greater the friction between the friction plate 3 and the mass ring 4, and the more significant the damping effect; conversely, when the nut 2 is loosened, the friction decreases and the damping effect is also weakened.

[0040] In this embodiment, the friction plate 3 is sleeved on the threaded rod 1, connected to the threaded rod 1 by a key, rotates synchronously, and is adjacent to the tightening nut 2. The friction plate 3 is made of wear-resistant material and can maintain good friction performance during long-term use. The main function of the friction plate 3 is to absorb vibration energy through friction during the vibration process, so as to achieve the vibration damping effect. By adjusting the tightness of the tightening nut 2, the pressure between the friction plate 3 and the mass ring 4 can be changed, thereby adjusting the friction damping.

[0041] In this embodiment, the mass ring 4 is fixed on the rubber ring 5 by an adhesive or other bonding method. Its main function is to provide additional mass, thereby absorbing vibration energy and reducing vibration transmission. The material of the mass ring 4 is usually metal or other high-density materials, which can provide sufficient inertia to offset the influence of torsional vibration. The contact surface between the mass ring 4 and the friction plate 3 absorbs vibration through friction, and the size of the friction force is adjusted by the nut 2.

[0042] In this embodiment, the rubber ring 5 is fixed on the bottom plate 6 by an adhesive or other means, acting as a torsional spring. The required elastic modulus needs to be calculated according to the vibration frequency, the structure of the mass ring 4 and the material characteristics. The bottom plate 6 is fixedly connected to the threaded rod 1. The bottom plate 6 provides the structural support for the entire vibration absorber, is rigidly connected to the shaft generating torsional vibration, and fixes the mass ring 4 through the rubber ring 5 to ensure the stable and reliable operation of the device.

[0043] In summary, a damping adjustable torsional vibration absorber provided in this embodiment is composed of a threaded rod 1, a nut 2, a friction plate 3, a mass ring 4, a rubber ring 5 and a bottom plate 6. The bottom plate 6 is used to connect the device to the rotating shaft that needs vibration damping. The rubber ring 5 is fixed on the bottom plate 6 by an adhesive, and the mass ring 4 is fixed on the rubber ring 5 by an adhesive. The end of the threaded rod 1 is fixedly connected to the bottom plate 6. The threaded rod 1 and the friction plate 3 are in keyway fit to rotate synchronously. The pre-pressure provided by the nut 2 presses the friction plate 3 against the mass ring 4. At this time, the rubber ring 5 - mass ring 4 - friction plate 3 form a single-degree-of-freedom spring - mass - damping system in the torsional degree of freedom. When the frequency of this system is adjusted to be the same as the torsional vibration frequency of the main shaft, the friction force between the friction plate 3 and the mass ring 4 absorbs part of the vibration energy, thereby reducing the vibration amplitude. By finely adjusting the tightness of the nut 2, the pre-pressure between the friction plate 3 and the mass ring 4 can be increased or decreased, and then the size of the friction force can be adjusted, quickly and conveniently adjusting the damping coefficient of the vibration damping system to the optimal value.

[0044] Embodiment 2 This embodiment provides a damping adjustment method for a damping adjustable torsional vibration absorber. Based on the above-mentioned damping adjustable torsional vibration absorber, it includes the following processes: When the rotating shaft undergoes torsional vibration, the vibration energy generates corresponding torsional vibration through the base plate 6 and the buffer damping ring. The buffer damping ring applies an anti-phase torsional inertia moment and dissipates the vibration energy through the frictional force with the friction plate 3. The adjusting nut 2 controls the frictional pressure between the friction plate 3 and the buffer damping ring, thereby obtaining the optimal damping coefficient. The required pre-pressure is calculated based on the optimal damping coefficient. According to the relationship between the tightening torque of the nut 2 and the pre-pressure, the nut 2 is tightened to complete the damping adjustment of the damping adjustable torsional vibration absorber.

[0045] Specifically, the damping adjustment realizes the control of the pre-pressure by adjusting the tightening torque of the nut 2. The magnitude of the pre-pressure directly affects the frictional force between the friction plate 3 and the mass ring 4, and thus affects the overall damping coefficient of the system. By increasing the tightening torque of the nut 2, the pre-pressure of the friction plate 3 is increased, thereby increasing the frictional damping; conversely, reducing the tightening torque of the nut 2 will reduce the pre-pressure of the friction plate 3 and decrease the system damping.

[0046] Specifically, based on the relationship between the tightening torque of the nut 2 and the pre-tightening force of the friction plate 3, the damping coefficient of the system is accurately calculated and controlled by adjusting the tightening torque of the nut 2. The specific calculation steps are as follows: Adjust the tightening or loosening degree of the tightened nut 2 to control the frictional pressure between the friction plate 3 and the mass ring 4; According to the actual working conditions and the mass ratio of the shock absorber, the optimal damping ratio of the vibration absorber is calculated , then the optimal equivalent viscous damping coefficient of the frictional force can be calculated by the following formula: (1) Where, and are the equivalent mass and stiffness of torsional vibration.

[0047] Assume that the torsional angular displacement of the mass ring 4 can be expressed as: (2) Where, is the angular displacement amplitude, is the circular frequency, is the initial phase.

[0048] Assume , according to the condition that the work done by the frictional force within one vibration period is equal to the work done by the equivalent viscous damping force, the expression is as follows: (3) Where, r is the distance from any point on the friction plate to the center; The required pre-pressure can be calculated as (4) Among them, among them, C eq is the optimal damping coefficient; α 0 is the angular displacement amplitude; μ is the friction coefficient; r 0 is the outer diameter of the friction plate; r i is the inner diameter of the friction plate.

[0049] According to the relationship between the tightening torque of the nut 2 and the pre-pressure, tighten the nut 2 with a torque wrench.

[0050] In summary, this embodiment provides a damping adjustment method for a damping adjustable torsional vibration absorber. By adjusting the nut 2 to control the friction pressure between the friction plate 3 and the buffer vibration damping ring, the damping coefficient of the absorber can be conveniently adjusted. This adjustability enables the absorber to adapt to different vibration conditions and load environments, optimizing the vibration damping effect. In this embodiment, the required pre-pressure is obtained through calculation, and the nut 2 is tightened according to the relationship between the tightening torque of the nut 2 and the pre-pressure. This precise calculation and adjustment process ensure that the absorber can achieve the best vibration damping effect in practical applications. By effectively suppressing the torsional vibration in mechanical equipment, the present invention can significantly reduce the fatigue damage of mechanical components and extend the service life of the equipment.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A torsional vibration absorber with adjustable damping, characterized in that: It comprises a threaded rod (1), a nut (2), a friction plate (3), a buffer vibration reduction ring assembly and a base plate (6); The base plate (6) is arranged on the rotating shaft, one end of the threaded rod (1) is fixed on the base plate (6), the buffer vibration-damping ring is sleeved on the threaded rod (1) and fixed on the base plate (6); the friction plate (3) is sleeved on the threaded rod (1) and is key-connected to the threaded rod (1) and abuts against the buffer vibration-damping ring; the nut (2) is threadedly connected to the threaded rod (1) and abuts against the friction plate (3) and is used to provide pre-pressure to the friction plate (3) and the buffer vibration-damping ring to adjust the damping of the vibration absorber.

2. The torsional vibration absorber with adjustable damping according to claim 1, characterized in that: The buffer vibration-damping ring comprises a mass ring (4) and a rubber ring (5); The rubber ring (5) is sleeved on the threaded rod (1) and fixed on the bottom plate (6); The mass ring (4) is sleeved on the threaded rod (1) and fixed on the rubber ring (5).

3. The torsional vibration absorber with adjustable damping according to claim 2, characterized in that: The mass ring (4) is made of metal and is used to provide inertial mass to absorb and offset vibration energy generated by torsional vibration.

4. The torsional vibration absorber with adjustable damping according to claim 1, characterized in that: The rod body of the threaded rod (1) is arranged perpendicular to the plate surface of the bottom plate (6), and the threaded rod (1) is fixedly connected to the bottom plate (6) by welding or threaded connection.

5. The torsional vibration absorber with adjustable damping according to claim 1, characterized in that: The friction plate (3) and the buffer vibration-damping ring group are coaxially arranged.

6. The torsional vibration absorber with adjustable damping according to claim 1, characterized in that: The friction plate (3) is made of a wear-resistant material to enhance friction damping.

7. The torsional vibration absorber with adjustable damping according to claim 1, characterized in that: The friction plate (3) and the buffer vibration-damping ring are in planar contact.

8. A damping adjustment method for a torsional vibration absorber with adjustable damping, based on the torsional vibration absorber with adjustable damping according to any one of claims 1 to 7, characterized in that: The process includes the following: When the rotating shaft undergoes torsional vibration, the vibration energy generates corresponding torsional vibration through the base plate (6) and the buffer vibration damping ring. The buffer vibration damping ring applies an anti-phase torsional inertia moment and dissipates the vibration energy through the friction between the friction plate and the buffer vibration damping ring. The nut (2) is adjusted to control the friction pressure between the friction plate and the buffer vibration damping ring, thereby obtaining an optimal damping coefficient. The required preload is calculated based on the optimal damping coefficient. Based on the relationship between the tightening torque of the nut (2) and the preload, the nut (2) is tightened to complete the damping adjustment of the adjustable damping torsional vibration absorber.

9. The damping adjustment method of the torsional vibration absorber with adjustable damping according to claim 8, characterized in that: The adjusting nut (2) controls the friction pressure between the friction plate and the buffer vibration reduction ring. The specific adjustment process is as follows: By increasing the tightening torque of the nut (2), the pre-pressure of the friction plate (3) is increased, thereby increasing the friction damping; conversely, reducing the tightening torque of the nut (2) will reduce the pre-pressure of the friction plate (3), thereby reducing the system damping.

10. The damping adjustment method of the torsional vibration absorber with adjustable damping according to claim 8, characterized in that: The calculation formula of the pre-pressure is as follows: in, C eq is the optimal damping coefficient; α 0 is the angular displacement amplitude; μ is the friction coefficient; r 0 is the outer diameter of the friction plate; r i is the inner diameter of the friction plate.

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