CN117780896B - Damping ring with additional nonlinear energy well and rotary piece adopting damping ring - Google Patents
Damping ring with additional nonlinear energy well and rotary piece adopting damping ring Download PDFInfo
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Abstract
The invention discloses a damping ring with an additional nonlinear energy trap, which comprises a circular damping ring main body and a NES mass ring arranged on the inner side of the damping ring main body, wherein a plurality of first limit grooves are formed on the inner side of the damping ring main body, a plurality of second limit grooves with different widths are formed on the outer side of the NES mass ring, the second limit grooves are in one-to-one correspondence with the first limit grooves, elastic connecting pieces are clamped in the first limit grooves, the elastic connecting pieces extend into the second limit grooves and are positioned in the centers of the second limit grooves, and the sizes of the elastic connecting pieces are smaller than those of the second limit grooves with the smallest widths; when the damping ring main body and the NES mass ring are twisted relatively, the number of elastic connecting pieces extruding the side wall of the second limiting groove is different, and the connecting rigidity between the damping ring main body and the NES mass ring is different. The damping ring main body, the elastic connecting piece and the NES mass ring form a nonlinear energy trap, so that the axial vibration reduction of the damping ring and the torsional vibration suppression of the nonlinear energy trap are integrated, and the vibration reduction effect is good.
Description
Technical Field
The invention relates to vibration reduction of a rotating member, in particular to a damping ring with an additional nonlinear energy well and the rotating member adopting the damping ring.
Background
The spiral bevel gear is widely applied to the fields of automobiles, ships, aerospace and the like by virtue of the reliable transmission performance and the flexible design characteristics, and has the advantages of wide speed change range, high transmission efficiency, compact structure and the like. Spiral bevel gears are often used in high load and high rotational speed situations, so they are often subjected to intense excitation, which can cause the spiral bevel gears to undergo very large axial, radial and torsional vibrations, thereby affecting the drive train and even causing drive train failure, so spiral bevel gear vibration reduction has been a difficulty in the vibration reduction field.
At present, gear vibration reduction is divided into active vibration reduction and passive vibration reduction, wherein the active vibration reduction mainly comprises edge trimming of a gear, machining precision of gear teeth improvement and the like; although these methods are theoretically feasible, they require a large amount of theoretical calculation and expensive precision machining machines in practical application, and have too high time cost and economic cost and high implementation difficulty. The passive vibration reduction mainly comprises additional damping ring vibration reduction and radial plate hole-shaped optimized vibration reduction; the radial hole vibration damping needs to be punched on the radial plate of the gear, which affects the transmission performance of the gear and is not suitable for devices with high-precision transmission requirements; damping ring vibration attenuation is the most mainstream passive vibration attenuation scheme at present, and the vibration attenuation mechanism of the damping ring is as follows: the integral damping ring is arranged on the gear groove through the heating gear and the cooling damping ring, the axial length of the damping ring is slightly smaller than that of the groove, so that the damping ring can axially move, when the gear vibrates, the damping ring and the gear relatively move, and the damping ring axially relatively moves to generate friction energy consumption so as to axially damp; similarly, friction generated by the axial torsion movement of the damping ring relative to the gear can also inhibit the axial torsion vibration. The damping ring has very good effect of inhibiting axial and axial torsional vibration of the gear, but does not obviously reduce radial vibration of the gear, and the damping ring only depends on friction vibration reduction to generate serious abrasion after a period of action, so that the subsequent vibration reduction effect is greatly influenced, and continuous vibration reduction is difficult.
Disclosure of Invention
The invention aims to: aiming at the defects, the invention provides the damping ring with the additional nonlinear energy well, which has good vibration reduction effect.
The invention also provides a rotating member adopting the damping ring.
The technical scheme is as follows: in order to solve the problems, the damping ring with the nonlinear energy trap comprises a circular damping ring main body and NES mass rings arranged on the inner side of the damping ring main body, wherein a plurality of first limit grooves are formed on the inner side of the damping ring main body, a plurality of second limit grooves with different widths are formed on the outer side of the NES mass rings, the positions of the second limit grooves are in one-to-one correspondence with those of the first limit grooves, elastic connecting pieces are clamped in the first limit grooves and extend into the second limit grooves and are positioned in the centers of the second limit grooves, the size of the elastic connecting pieces is smaller than that of the second limit grooves with the smallest width, and the damping ring main body, the elastic connecting pieces and the NES mass rings form the nonlinear energy trap, namely NES; when the damping ring main body and the NES mass ring are twisted relatively, the elastic connecting piece extrudes the side wall of the second limiting groove to form rigid connection, and the larger the relative torsion angle is, the more the elastic connecting piece extrudes the side wall of the second limiting groove is, so that the connection rigidity between the damping ring main body and the NES mass ring is changed.
Further, the stiffness expression between the damping ring body and the NES mass ring is:
；
Wherein, For the total stiffness between the damping ring body and NES mass ring,/>For the relative torsion angle between damping ring body and NES mass ring,/>For the stiffness between the damping ring body and NES mass ring when initially untwisted,/>、/>、、/>For corresponding to the rigidity of the elastic connecting piece,/>Is the total number of the first limit grooves,/>、/>、/>、/>、Is an angle value.
Further, the elastic connecting piece is T-shaped and comprises a wide part and a narrow part, the first limiting groove is T-shaped, the second limiting groove is long, the wide part of the elastic connecting piece is clamped into the first limiting groove of the T-shaped, and the narrow part of the elastic connecting piece extends into the second limiting groove.
Further, set up first spread groove between every two first spacing grooves, set up the second spread groove between every two second spacing grooves, first spread groove and second spread groove position one-to-one, the support piece is gone into to card in corresponding first spread groove and the second spread groove, and support piece is used for the connection of damping ring main part and NES quality ring. The support piece is I-shaped and comprises a first wide part, a narrow part and a second wide part which are connected in sequence, wherein the first connecting groove and the second connecting groove are T-shaped, and the first wide part and the second wide part of the support piece are respectively clamped into the first connecting groove and the second connecting groove.
Further, cavities are formed between the first connecting grooves and the first limiting grooves of the NES mass ring, damping particles are filled in the cavities, and vibration reduction of the damping particles is achieved through collision and friction energy consumption between the damping particles and the inner walls of the cavities. The NES mass ring is provided with a filling round hole communicated with the cavity, the filling round hole is used for filling damping particles into the cavity, and the filling round hole is closed through a sealing plug.
The invention also adopts a rotating piece applying the damping ring, and the rotating piece comprises a rotating main body, wherein the rotating main body is provided with a mounting groove, the damping ring is mounted in the mounting groove, and the rotating shaft of the rotating main body is overlapped with the central shaft of the damping ring.
Further, the rotating body is a spiral bevel gear, the spiral bevel gear comprises spiral teeth, a hub, a radial plate for connecting the spiral teeth and the hub, a mounting groove is formed in one end, close to the spiral teeth, of the radial plate, and the damping ring is mounted in the mounting groove. The radial plates are obliquely arranged and form an acute angle with the rotating shaft of the spiral bevel gear. A groove is processed on a radial plate of the spiral bevel gear and is used for installing the gear damping ring, the gear damping ring is placed on the groove of the radial plate through the principle of thermal expansion and cold contraction, and the gear damping ring is fixed on the radial plate through the generated contact pressure and centrifugal force and is in tight contact with the groove.
The beneficial effects are that: compared with the prior art, the invention has the remarkable advantages that the damping ring main body, the elastic connecting piece and the NES mass ring form a nonlinear energy well, the axial vibration reduction of the damping ring and the torsional vibration suppression of the nonlinear energy well are integrated, and the vibration reduction effect is good. The radial vibration reduction of the special composite material I-shaped support piece with good elasticity is combined, so that the damping ring has good effect on the inhibition of radial vibration of gears, is simple in structure, convenient to assemble, disassemble and maintain, low in processing and maintenance cost, can be widely applied to various gears, can be popularized to vibration reduction of various rotating pieces, and has wide application prospect.
Drawings
FIG. 1 is a top view of a damping ring of the present invention.
FIG. 2 is a schematic view of the whole structure of the damping ring body according to the present invention.
Fig. 3 is a semi-sectional view of the NES mass ring of the present invention.
Fig. 4 is a schematic structural view of the i-shaped supporting member in the present invention.
Fig. 5 is a schematic structural view of a T-shaped elastic connector according to the present invention.
Fig. 6 is a schematic structural view of a damping particle sealing plug according to the present invention.
Fig. 7 is a sectional view of a spiral bevel gear in accordance with the present invention.
Fig. 8 is a cross-sectional view of a spiral bevel gear to which a damping ring is applied in the present invention.
Detailed Description
Example 1
As shown in fig. 1, a damping ring with a nonlinear energy trap in this embodiment includes a closed annular damping ring main body 2 and a NES mass ring 3 disposed inside the damping ring main body 2, as shown in fig. 2, a plurality of T-shaped grooves with different lengths are disposed inside the damping ring main body 23, including a first limiting groove 21 and a first connecting groove 24, in this embodiment, four grooves are disposed in each groove, and two kinds of grooves are alternately disposed inside the damping ring main body 23 at the same angular interval. The damping ring main body outer side 22 mainly reduces the axial vibration of the gear through friction energy consumption, and the vibration reduction principle is described in the background art and is not described herein.
As shown in fig. 3, the NES mass ring 3 on the inner side is also a closed ring shape, and a plurality of T-shaped second connecting grooves 34 and rectangular second limiting grooves (31, 36, 37, 38) are formed on the outer side 32 of the NES mass ring, wherein the T-shaped second connecting grooves 34 are identical, the width of each rectangular second limiting groove 31 is different, the two grooves are alternately distributed at the same angular interval, in this embodiment, four of each groove, the widths of the 4 rectangular second limiting grooves are different, and the four different widths are divided into four different widths, and the 4 different widths of the second limiting grooves are used for forming piecewise linear rigidity, which is the key for forming the nonlinear energy well.
Cavities are arranged between the first connecting groove 24 and the first limiting groove 21 of the NES mass ring 3, in the embodiment, the inner hollow structure of the NES mass ring is divided into eight small hollow arc structures by taking the position of the groove as a node, and a round hole 35 is formed in the center of the outer wall of the same side of each arc structure. A large number of damping particles 4 are uniformly filled in each arc-shaped hollow structure through round holes 35, and sealing plugs 7 shown in fig. 6 are arranged at eight round holes for preventing the damping particles from flowing out; the diameter of the damping particles is far smaller than the cross-section size of the hollow structure, and the damping particles are made of metal or other materials with better friction energy consumption. The damping particles filled inside the NES mass ring may consume a large amount of energy for the NES mass ring, thereby enhancing the vibration damping effect. Damping of damping particles mainly depends on collision and friction energy consumption between damping particles and between particles and the inner wall; the collision between damping particles is in two forms of frontal collision and oblique collision, only the collision energy is consumed during frontal collision, and the oblique collision has both collision energy consumption and friction energy consumption. Taking any two damping particle collisions as an example, the collision energy consumption and the friction energy consumption can be expressed by the following expressions:
Collision energy consumption:
（1）；
In the middle of 、/>Mass of two damping particles respectively,/>For the coefficient of restitution of the damping particles,/>Is the relative velocity of the damping particles.
Friction energy consumption:
（2）；
In the middle of Is the friction coefficient,/>Is normal force,/>Tangential relative displacement.
From this, the total energy consumption expression of the damping particles can be derived as:
（3）；
The damping effect of the damping particles can be evaluated by obtaining the total energy consumption, so that the specific parameter design of the damping particles for achieving the optimal damping effect is explored.
Connection of damping ring and NES mass ring: the axes of the damping ring and the NES mass ring are coincident, the diameter of the inner side 23 of the damping ring is larger than that of the outer side 32 of the NES mass ring, and the damping ring is not contacted with the NES mass ring, but a certain distance is reserved, and a gap exists; the axial length of the damping ring main body is longer than that of the NES mass ring, and the axial distance differences are equal and symmetrically distributed. The first connecting grooves of the damping ring main body are in one-to-one correspondence with the second connecting grooves on the NES mass ring; the first limit grooves of the damping ring main body are in one-to-one correspondence with the second limit grooves of the NES mass ring. The damping ring main body and the NES mass ring are connected by a supporting member 5 in the shape of a letter, as shown in fig. 4, the size of the supporting member is identical to the i-shaped gap formed by the first connecting groove of the damping ring main body and the second connecting groove on the NES mass ring, the supporting member comprises a first wide portion 51, a narrow portion 52 and a second wide portion 53 which are sequentially connected, the first wide portion and the second wide portion of the supporting member 5 are respectively clamped into the first connecting groove 24 and the second connecting groove 34, the lengths of the first wide portion and the second wide portion are identical, in this embodiment, the supporting member is four in number and identical, and is just matched with the four pairs of i-shaped gaps, and the supporting member is inserted into the gap to connect the damping ring main body and the NES mass ring. The i-shaped support is made of a composite material having good damping properties, which should also be a damping material that provides effective radial vibration damping for the gear, and has sufficient stiffness to drive the NES mass ring to rotate with the damping ring body.
Four elastic connecting pieces 6 with the same excellent elasticity and T shapes are inserted into four long T-shaped first limit grooves 21 of the damping ring main body, as shown in fig. 5, each elastic connecting piece comprises a wide part 61 and a narrow part 62, the wide parts of the elastic connecting pieces are clamped into the T-shaped first limit grooves, the narrow parts of the elastic connecting pieces extend into the second limit grooves but are not contacted with NES quality rings, and are positioned in the middle of the second limit grooves, and the gaps at two sides of the narrow parts extending into the second limit grooves are different due to different widths of the second limit grooves.
At rest, the damping ring body and NES mass ring are connected by the I-shaped support, which creates an initial stiffness; when the damping ring main body rotates along with the gear, the NES mass ring is driven to rotate through the I-shaped supporting piece, torsional vibration is generated in the rotating process, relative torsion is generated between the damping ring main body and the NES mass ring, the relative torsion angle is increased along with the increase of the torsional vibration, and when the relative torsion angle exceeds the gap between the narrowest rectangular second limit groove and the narrow part of the T-shaped elastic connecting piece, the side face of the narrowest second limit groove is contacted with the elastic connecting piece, and the contact forms rigidity; at this time, the total stiffness between the damping ring body and the NES mass ring is a superposition of the initial stiffness and the resulting stiffness; along with the increase of the relative torsion angle, the elastic connecting pieces are sequentially contacted with the side face of the second limit groove, new rigidity is sequentially formed until 4 elastic connecting pieces are contacted with the second limit groove, and the total rigidity is sequentially overlapped. This results in a stiffness between the damping ring body and the NES mass ring that is different in different torsion angle intervals, resulting in a piecewise linear stiffness expressed as follows:
（4）；
In the middle of For the total stiffness,/>Stiffness of I-shaped support at rest,/>、/>、/>、/>Stiffness of four elastic connectors,/>, respectivelyIs relative torsion angle,/>、/>、/>、/>、/>、/>Is an angle value.
Thus, the damping ring body and NES mass ring constitute a nonlinear energy well. The nonlinear energy trap is a nonlinear absorber for realizing vibration suppression by utilizing target energy transfer; the target energy transfer is a unidirectional transfer phenomenon of vibration energy between the main vibration system and the nonlinear coupled vibrator, and is realized through resonance capture between the main vibration system and the NES, and the energy of the main system needing vibration reduction is unidirectionally transferred into the nonlinear vibrator during operation, so that the vibration reduction of the main system is realized. The key point of the nonlinear energy trap is that the nonlinear energy trap has nonlinear parameters, namely nonlinear rigidity, nonlinear damping and 3 types of nonlinearity, and the nonlinear vibration absorber with the nonlinear rigidity is adopted in the embodiment, and the nonlinear rigidity is realized through rectangular grooves with different widths on an elastic connecting piece and an NES mass ring.
The kinetic equation for an additional nonlinear energy well can be expressed by the following equation:
（5）；
In the middle of 、/>、/>、/>The rotational inertia, torsional damping, torsional stiffness and torsion angle of the gear respectively; /(I)、、/>The moment of inertia, torsional damping and torsion angle of the NES mass, respectively; /(I)、/>The piecewise linear torque and the externally excited torque, respectively.
The vibration suppression effect of the nonlinear energy trap can be evaluated by using the ability of the NES mass ring to absorb gear torsional vibration energy, and the absorption ability of the NES mass ring to the gear rotation transient torsional vibration energy is as follows:
（6）；
In the middle of 、/>、/>The NES transient energy percentage, NES transient mechanical energy, and gear transient mechanical energy, respectively.
Example 2
As shown in fig. 8, a rotary member to which the above-described damping ring is applied in the present embodiment is a spiral bevel gear 1 as shown in fig. 7, and the spiral bevel gear 1 includes spiral teeth 11, a mounting groove 12 hollowed out for mounting the damping ring to which the particle-containing nonlinear energy trap is added in the above-described embodiment, an inclined thin web 13, and a hub 14. It will be appreciated that the arcuate teeth shown in this embodiment may be straight teeth or other different tooth shapes, and the web may be a straight web or other thin rotating circular plate requiring vibration damping; the vibration damping object shown, namely the spiral bevel gear, can also be other gears or other rotating parts of different types which need to be damped. The damping ring main body is arranged in the mounting groove 12 of the spiral bevel gear 1 in a heat expansion and cold contraction mode, so that contact pressure can be generated, and centrifugal force can be generated during rotation, so that the damping ring main body is tightly contacted with the mounting groove; when the gear runs, the damping ring and the gear generate relative motion, and the damping ring dampens the vibration of the gear through friction energy consumption. It will be appreciated that the number and shape of the slots need not be the same as in this example, provided that the desired effect is achieved.
The diameter of the damping particles 4 in the NES mass ring is much smaller than the cross-sectional dimensions of the NES mass ring, which are only used to illustrate the principle of operation and do not represent the actual dimensions; damping particles with different diameters or damping particles with different materials are considered, and are determined according to specific situations such as gear size, application occasion and the like.
The damping ring body and NES mass ring are connected by a specially-made I-shaped support 5 which is made of a composite material, and the composite material enables the support to have good vibration reduction effect in the radial direction and sufficient rigidity to achieve a stable connection effect. And then the elastic connecting piece 6 is inserted into the long T-shaped groove of the damping ring main body, and the damping ring main body and NES mass form a nonlinear energy well after all the elastic connecting pieces are connected. The manner of connection of the damping ring body and NES mass may vary and need not be the same as shown, so long as the piecewise linear stiffness described above is achieved and the damping ring body and NES mass ring are fixedly attached.
The damping process of the gear damping ring with the particle-containing nonlinear energy trap is described below in conjunction with the damping ring body, damping particles, and the damping mechanism of the nonlinear energy trap. The gear pair rotates under the drive of power, the gear vibrates under the meshing impact, and the vibration is amplified and aggravated at the thin web; the damping ring generates relative motion when rotating along with the gear, friction force is generated in the axial relative motion to do work, and the friction consumes vibration energy, so that the axial vibration of the gear is reduced. Meanwhile, the damping ring main body and the NES mass ring form a nonlinear energy well, and the damping ring main body and the gear can be regarded as a whole at the moment, and the gear is used for referring to the integration of the damping ring main body and the gear; in the process of driving the NES mass ring to rotate by the gear, relative torsion can be generated between the gear and the NES mass ring, and 4 elastic connecting pieces are sequentially contacted with the NES mass ring by the change of relative torsion angle to generate piecewise linear rigidity; the occurrence of piecewise linear stiffness forms a target energy transfer phenomenon, namely a unidirectional transfer phenomenon of vibration energy between a main vibration system and a nonlinear coupled vibrator; by this mechanism, the energy of gear torsional vibration is unidirectionally transferred to the NES mass ring during operation, thereby achieving a reduction in gear torsional vibration. The NES mass ring is internally filled with a large amount of small-diameter particle damping, and when a large amount of energy of gear vibration is transferred to the NES mass ring, the NES mass ring is caused to vibrate severely; when the NES mass ring rotates along with the gear, damping particles in the NES mass ring can move vigorously in an arc-shaped structure where the NES mass ring is located, so that severe collision and friction occur between the damping particles and the inner wall; according to collision and friction mechanisms of damping particles, the vibration energy of the NES mass ring is consumed, so that the vibration energy of the gear can be continuously transmitted to the NES mass ring, a high-performance vibration reduction effect can be kept for a long time, the vibration reduction performance of the device is improved, and vibration reduction is effective for a long time. The connecting piece of the damping ring main body and the NES mass ring, namely the I-shaped supporting piece, is made of a composite material and is also made of a vibration damping material, and when the gear and the additional damping ring vibrate, the radial vibration of the gear can be effectively reduced through the I-shaped supporting piece.
The gear damping ring containing the particle nonlinear energy well not only can enhance and maintain the damping effect by integrating the damping capability of the traditional damping ring and the nonlinear energy well, but also can effectively inhibit torsional vibration by a special I-shaped support piece, thereby realizing the comprehensive inhibition of axial, radial and torsional vibration of the gear, and having wide application prospect and good damping effect.
Claims (6)
1. The damping ring is characterized by comprising a circular damping ring main body (2) and NES mass rings (3) arranged on the inner side of the damping ring main body (2), wherein a plurality of first limit grooves (21) are formed on the inner side of the damping ring main body (2), a plurality of second limit grooves with different widths are formed on the outer side of the NES mass rings (3), the positions of the second limit grooves are in one-to-one correspondence with the positions of the first limit grooves, elastic connecting pieces (6) are clamped in the first limit grooves, the elastic connecting pieces (6) extend into the second limit grooves and are positioned in the centers of the second limit grooves, the sizes of the elastic connecting pieces are smaller than those of the second limit grooves with the smallest widths, and the damping ring main body, the elastic connecting pieces and the NES mass rings form the nonlinear energy well, namely NES; when the damping ring main body and the NES mass ring (3) are twisted relatively, the elastic connecting piece extrudes the side wall of the second limiting groove to form rigid connection, and the larger the relative twisting angle is, the more the elastic connecting piece extrudes the side wall of the second limiting groove is, so that the connection rigidity between the damping ring main body and the NES mass ring (3) is changed; the elastic connecting piece (6) is T-shaped and comprises a wide part and a narrow part, the first limiting groove is T-shaped, the second limiting groove is long-shaped, the wide part of the elastic connecting piece is clamped into the first limiting groove of the T-shaped, and the narrow part of the elastic connecting piece extends into the second limiting groove; a first connecting groove (24) is arranged between every two first limiting grooves (21), a second connecting groove (34) is arranged between every two second limiting grooves, the positions of the first connecting grooves and the second connecting grooves are in one-to-one correspondence, and a supporting piece (5) is clamped in the corresponding first connecting grooves and second connecting grooves and is used for connecting the damping ring main body (2) and the NES quality ring (3); cavities are arranged between the first connecting grooves (24) and the first limiting grooves (21) of the NES mass ring (3), damping particles (4) are filled in the cavities, and vibration reduction of the damping particles is realized through collision and friction energy consumption between the damping particles (4) and the inner walls of the cavities; the NES mass ring (3) is provided with a filling round hole communicated with the cavity, the filling round hole is used for filling damping particles (4) into the cavity, and the filling round hole is closed through a sealing plug.
2. The damping ring of claim 1, wherein the stiffness expression between the damping ring body and the NES mass ring is:
；
Wherein, For the total stiffness between the damping ring body and NES mass ring,/>For the relative torsion angle between damping ring body and NES mass ring,/>For the stiffness between the damping ring body and NES mass ring when initially untwisted,/>、/>、、/>For corresponding to the rigidity of the elastic connecting piece,/>Is the total number of the first limit grooves,/>、/>、/>、/>、Is an angle value.
3. Damping ring according to claim 1, characterized in that the support (5) is i-shaped and comprises a first wide portion, a narrow portion and a second wide portion connected in sequence, the first connecting groove (24) and the second connecting groove (34) are T-shaped, and the first wide portion and the second wide portion of the support (5) are respectively clamped into the first connecting groove (24) and the second connecting groove (34).
4. A rotating member employing the damping ring according to claim 1, characterized by comprising a rotating body provided with a mounting groove (12), the damping ring being mounted in the mounting groove, the axis of rotation of the rotating body coinciding with the central axis of the damping ring.
5. The rotating member according to claim 4, wherein the rotating body is a spiral bevel gear (1), the spiral bevel gear (1) includes spiral teeth (11), a hub (14), a web (13) connecting the spiral teeth (11) and the hub (14), a mounting groove (12) is provided at one end of the web (13) near the spiral teeth, and the damper ring is mounted in the mounting groove.
6. A rotating member according to claim 5, wherein the web (13) is arranged obliquely at an acute angle to the rotational axis of the spiral bevel gear (1).
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| CN114776784A (en) * | 2022-04-18 | 2022-07-22 | 中国航发沈阳发动机研究所 | Particle dry friction primary-secondary damping ring for gear vibration reduction |
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2024
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| GB911589A (en) * | 1960-12-20 | 1962-11-28 | Jarmuefejlesztesi Intezet | Silicone oil filled dynamic, torsional damper mainly for internal combustion engines |
| US4317388A (en) * | 1979-07-06 | 1982-03-02 | Dana Corporation | Gear wheel with vibration damping rings |
| GB2057625A (en) * | 1979-08-24 | 1981-04-01 | Gomma Antivibranti Applic | Sound-proofing arrangement for gear wheels |
| JPH10281259A (en) * | 1997-04-09 | 1998-10-23 | Ishikawajima Harima Heavy Ind Co Ltd | Gear for reduction gear |
| JP2012026528A (en) * | 2010-07-26 | 2012-02-09 | Aisin Ai Co Ltd | Friction damper |
| CN214036767U (en) * | 2020-12-10 | 2021-08-24 | 台州金泰精锻科技股份有限公司 | Lightweight silence shock attenuation drive gear |
| CN114776784A (en) * | 2022-04-18 | 2022-07-22 | 中国航发沈阳发动机研究所 | Particle dry friction primary-secondary damping ring for gear vibration reduction |
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| CN117780896A (en) | 2024-03-29 |
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