CN113464603B - Tuning dynamic damper with adjustable it is multidirectional - Google Patents
Tuning dynamic damper with adjustable it is multidirectional Download PDFInfo
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- CN113464603B CN113464603B CN202110661104.7A CN202110661104A CN113464603B CN 113464603 B CN113464603 B CN 113464603B CN 202110661104 A CN202110661104 A CN 202110661104A CN 113464603 B CN113464603 B CN 113464603B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Abstract
The invention relates to a multidirectional adjustable tuned dynamic damper, which comprises an installation support seat (1) and a plurality of mass spring damping pieces, wherein the mass spring damping pieces are vertically or horizontally arranged on the installation support seat (1), each mass spring damping piece comprises an adjustable mass block (4) and a hollow damping spring (7), and the control of the vibration with different frequencies in different directions is realized by adjusting the number and the installation positions of the mass spring damping pieces on the installation support seat (1), selecting the mass of the adjustable mass block (4) and selecting the rigidity of the hollow damping spring (7). Compared with the prior art, the invention not only has good vibration damping effect on the vibration of different frequency bands in multiple directions of the main vibration system, but also can adjust the direction and the natural frequency of the mass spring damping part according to different modal vibration modes and modal frequencies of the main vibration system, and has the advantages of simple installation, strong structural reliability, good adjustability, small volume occupation, good vibration damping effect and the like.
Description
Technical Field
The invention relates to the technical field of vibration and noise reduction of industrial equipment, in particular to a multidirectional adjustable tuned dynamic damper.
Background
Vibration is a common phenomenon in production and life, especially along with the development of present manufacturing industry and science and technology, equipment running speed constantly improves, and mechanical equipment's vibration problem receives more and more attention, and vibration not only can be to the precision of equipment and job stabilization nature still can inevitable produce the noise problem by great influence, and normal work and even health to operating personnel all have the harm. In order to inhibit harmful vibration, the tuned dynamic damper is widely used as an effective measure at present for vibration reduction and noise reduction devices on relevant equipment such as mechanical manufacturing, transportation, aerospace and the like, the conventional tuned dynamic damper can be regarded as a mass-spring-damping system added on a main system, and when the natural frequency is the same as the frequency of an external exciting force, the vibration of the main system can be obviously reduced.
However, the existing tuned dynamic damper generally only damps a certain frequency, or only has a good damping effect on vibration in a certain direction, and the adjustability is poor. In actual conditions, the vibration of a main vibration system often comprises a plurality of frequency bands and a plurality of directions, and Chinese patent CN204419974U discloses a multidirectional damping spring vibration isolator which comprises an upper bearing plate, a spring, a lower bearing plate and a damper, wherein the spring and the damper are arranged between the upper bearing plate and the lower bearing plate, the axial direction of the damper is parallel to the length direction of the spring, and the upper bearing plate and the lower bearing plate are fixed through a fastening assembly; the attenuator both ends are connected with upper and lower bearing plate respectively through the ball pivot, promptly: the two ends of the damper are connected with ball head rods of the ball hinges, the ball head seat of the ball hinge at the upper end of the damper is connected with the upper bearing plate, and the ball head seat of the ball hinge at the lower end of the damper is connected with the lower bearing plate. The multi-directional damping spring vibration isolator can indeed realize vibration reduction in the horizontal direction and the vertical direction, but the spring damping unit in the patent is difficult to adjust according to the vibration in different directions and different frequencies in a main vibration system, and particularly difficult to adjust the natural frequency of the horizontal vibration in the patent, so that the vibration absorption effect of the vibration in a certain direction is not obvious.
Disclosure of Invention
The present invention aims to overcome the defects of the prior art and provide a multidirectional adjustable tuned dynamic damper which can perform good vibration absorption on the vibration of a main vibration system in different directions and different frequencies, and can adjust mass spring damping pieces in different directions according to the vibration of the main vibration system in different directions and different frequencies, so as to achieve good vibration absorption on the vibration of the main vibration system in different directions.
The purpose of the invention can be realized by the following technical scheme: the utility model provides a harmonious dynamic damper with adjustable it is multidirectional, includes erection bracing seat and a plurality of mass spring damping piece, a plurality of mass spring damping piece is perpendicular or horizontal installation on the erection bracing seat, mass spring damping piece include adjustable quality piece and hollow damping spring, through quantity and the mounted position of adjusting a plurality of mass spring damping pieces on the erection bracing seat to the selection of the quality of adjustable quality piece and hollow damping spring's rigidity, realize the control to the vibration of not equidirectional different frequencies.
Furthermore, the mounting and supporting seat comprises a supporting plate and an annular mounting seat arranged on the supporting plate, wherein the supporting plate is provided with a damper mounting hole, and the multidirectional adjustable tuned dynamic damper is tightly fixed on the main vibration equipment;
each mass spring damping piece is installed on the annular installation seat, and the annular installation seat is provided with an installation hole for vertically installing the mass spring damping piece and an arc installation groove for horizontally installing the mass spring damping piece.
Furthermore, the radian of the arc mounting groove is 60-120 degrees, and the horizontal covering in the 360-degree vibration participating direction is realized by selecting the mounting position of the arc mounting groove on the mounting support seat.
Furthermore, a bottom mounting block is further arranged on the annular mounting seat of the mounting and supporting seat, one surface of the bottom mounting block is an arc-shaped tangent plane, the other surface of the bottom mounting block is a plane, the arc-shaped tangent plane is matched with the outer diameter of the mounting and supporting seat, and an annular limiting groove is formed in the plane and matched with the adjustable mass block to limit the hollow damping spring;
the bottom mounting block is tightly fixed on the mounting support seat through a trapezoidal nut and a nut.
Furthermore, the mass spring damping piece is tightly fixed on the mounting support seat through a mounting screw and a matched nut.
Furthermore, a center hole for installation is formed in the center of the adjustable mass block, and the mass spring damping piece is fixed on the installation supporting seat through a mounting screw penetrating through the center hole.
Furthermore, symmetrical annular limiting grooves are formed in two sides of the adjustable mass block, and the hollow damping springs are located on two sides of the adjustable mass block and are limited through the annular limiting grooves;
and when a plurality of mass blocks are selected to be superposed for use according to different frequencies, the mass blocks are connected and fixed by matching the screw nuts with the through holes on the mass blocks.
Furthermore, the hollow damping spring is positioned at the inner side and the outer side of the adjustable mass block,
when the damping spring is positioned at the inner side, annular limiting grooves for limiting the hollow damping spring are respectively arranged on the adjustable mass block and the mounting and supporting seat;
when the damping device is positioned on the outer side, one end of the hollow damping spring is arranged in the annular limiting groove of the adjustable mass block, and the other end of the hollow damping spring is installed in a limiting mode through the limiting installation disc.
Furthermore, the limiting disc is provided with a through hole with the diameter consistent with that of the mounting screw rod, and one surface of the limiting disc is provided with an annular limiting groove.
Furthermore, the installation supporting seat is made of metal material,
the adjustable mass block is made of steel or lead materials;
the hollow damping spring is made of spring steel materials.
Compared with the prior art, the invention has the following advantages:
1. the invention provides a multidirectional adjustable tuned dynamic damper based on the forced vibration characteristic and the modal analysis theory of a two-degree-of-freedom system, which can add a proper subsystem to a main vibration system according to the modal vibration mode of the main vibration system and the modal frequency under the modal vibration mode.
2. The multidirectional adjustable tuned dynamic damper not only can have good vibration damping effect on vibration of different frequency bands in multiple directions of the main vibration system, but also can adjust the direction and the natural frequency of the mass spring damping part according to different modal vibration modes and modal frequencies of the main vibration system, so that better vibration damping effect can be provided under the conditions of simple installation, strong structural reliability, good adjustability and small volume occupation.
3. The invention provides a tuned dynamic damper with adjustable frequency and direction, which can be used for vibration reduction and noise reduction of industrial equipment and vibration components, and can play a good role in controlling the vibration of a main vibration system in different directions through mass spring damping pieces in multiple directions, wherein a horizontal mass spring damping piece system is tightly fixed on a mounting support seat through an arc mounting groove and a trapezoidal nut, a bottom mounting block, a screw rod and a nut, and a vertical mass spring damping piece is tightly fixed on the mounting support seat through the screw rod and the nut, wherein a mass unit in the mass spring damping piece is a mass block with adjustable assembly mass, a spring damping unit is a hollow damping spring, the selection in the 360-degree direction in the horizontal direction can be realized through the fixed positions of the three horizontal mass spring damping pieces on the arc mounting groove, and the vibration reduction effect in multiple directions can be simultaneously realized, and the mass, the rigidity and the vibration reference direction of the tuned dynamic damper can be adjusted through the selection of the mass of the mounting block, the rigidity of the hollow damping spring and the selection of the mounting position of an upper limit mounting plate during the mounting of the spring.
Drawings
FIG. 1 is an isometric view of a multi-way adjustable tuned dynamic damper
FIG. 2 is a front view of a multi-way adjustable tuned dynamic damper;
FIG. 3 isbase:Sub>A sectional view taken along line A-A of the multi-way adjustable tuned dynamic damper;
FIG. 4 is a cross-sectional view taken along line B-B of the multi-way adjustable tuned dynamic damper;
FIG. 5 is an isometric view of a mounting support for a multi-way adjustable tuned dynamic damper;
FIG. 6 is an elevation view of a horizontal mass-spring-damper system of the multi-way adjustable tuned dynamic damper;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;
FIG. 8 is a conical hollow damping spring;
FIG. 9 is a side view of FIG. 8;
FIG. 10 is a modal shape at 165 Hz;
FIG. 11 shows a 281Hz mode shape;
FIG. 12 shows a mode shape at 442 Hz;
FIG. 13 is a vertical response under vertical excitation;
FIG. 14 is a lateral response under lateral excitation;
FIG. 15 is a longitudinal response under longitudinal excitation.
Wherein: 1. mounting a supporting seat; 2. connecting a bolt and a nut; 3. a limiting disc; 4. an adjustable mass block; 5. a bottom mounting block; 6. installing a screw rod; 7. a hollow damping spring; 8. a damper mounting hole; 9. a trapezoidal nut; 10. an arc mounting groove; 11. a nut; 12. mounting holes; 13. annular spacing groove.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 3, the multi-directional adjustable tuned dynamic damper comprises an installation support base 1 and a plurality of mass-spring-damping systems (collectively referred to as mass spring damping elements in the present invention), wherein the mass spring damping elements are vertically or horizontally installed on the installation support base 1, and each mass spring damping element is tightly fixed on the installation support base 1 through an installation screw 6 and a matching nut. The mass spring damping parts comprise adjustable mass blocks 4 and hollow damping springs 7, and the control of the vibration of different frequencies in different directions is realized by adjusting the number and the installation positions of the mass spring damping parts on the installation support seat 1, and selecting the mass of the adjustable mass blocks 4 and the rigidity of the hollow damping springs 7.
The installation support seat 1 is made of metal materials, and structurally comprises a support plate and an annular installation seat arranged on the support plate as shown in figure 5, wherein a damper installation hole 8 is formed in the support plate, and the multidirectional adjustable tuned dynamic damper is tightly fixed on a main vibration device;
each mass spring damping part is arranged on an annular mounting seat, and the annular mounting seat is provided with a mounting hole 12 for vertically mounting the mass spring damping part and an arc mounting groove 10 for horizontally mounting the mass spring damping part. The radian of the arc mounting groove 10 is 60-120 degrees, and the horizontal covering in the 360-degree vibration participating direction is realized by selecting the mounting position of the arc mounting groove 10 on the mounting and supporting seat 1.
In a specific embodiment of the invention, a modal test or theoretical modal analysis is performed on the main vibration system, fundamental analysis is performed on bending modes in the vertical direction, the transverse direction and the longitudinal direction of the main vibration system to find modal frequencies under different modes, and the radian of the arc mounting groove 10 can be controlled to be about 65 degrees in consideration of installation performance and processing simplicity.
The multiple mass spring damping members are vertically or horizontally arranged on the installation support base 1 and at least comprise a vertical arrangement and multiple horizontal arrangements, in one embodiment of the invention, a vertically arranged mass spring damping member and three horizontally arranged mass spring damping members are arranged, as shown in fig. 1-3, wherein the vertically arranged mass spring damping member is arranged in an annular installation base of the installation support base 1, an installation hole 12 is arranged in the annular installation base, and a long installation screw 6 penetrates through the mass spring damping member and is inserted into the installation hole 12 to tightly fix the vertical mass spring damping member on the installation support base 1. The horizontal mass spring damping piece is adjusted and installed according to the required direction through the arc installation groove 10 and is tightly fixed on the installation support seat 1.
The structure of each mass spring damping part is the same, as shown in fig. 4-7, each mass spring damping part comprises an adjustable mass block 4 and a hollow damping spring 7, the adjustable mass block 4 can be made of steel or lead materials, one or more mass blocks are selected as required to form the adjustable mass block, two sides of each mass block are respectively provided with a symmetrical through hole and an annular limiting groove 13, mass blocks with different mass can be installed according to different frequencies, when a plurality of mass blocks are selected to be overlapped, each mass block penetrates through the mass blocks through two sets of bolt nuts 2 to be connected, the center of each mass block is provided with a central hole, the diameter of the central hole is larger than that of an installation screw rod 6, the installation screw rod 6 conveniently penetrates through the mass blocks, and the mass spring damping parts are installed on an installation supporting seat 1.
The hollow damping spring 7 is made of spring steel materials, the hollow part is filled with damping materials, different springs such as a conical variable-pitch hollow damping spring and the like can be adopted according to different use requirements, and the hollow damping spring 7 is tightly installed through the installation supporting seat 1, the limiting installation disc 3 and the annular limiting groove 13 on the mass block.
Specifically, two hollow damping springs 7 are provided in each mass spring damping member, respectively inside and outside the adjustable mass 4:
when the damping device is positioned at the inner side, the hollow damping spring 7 is arranged between the adjustable mass block 4 and the mounting and supporting seat 1, for a vertically arranged mass spring damping piece, an annular limiting groove 13 (shown in figure 5) is arranged in an annular mounting seat of the mounting and supporting seat 1, annular limiting grooves 13 are respectively arranged at two sides of the adjustable mass block 4, and the hollow damping spring 7 is limited through the adjustable mass block 4 and the annular limiting groove 13 on the mounting and supporting seat 1; for a horizontally arranged mass spring damping piece, because the side surface of an annular mounting seat of the mounting and supporting seat 1 is annular and cannot be directly mounted, a bottom mounting block 5 is arranged, one surface of the bottom mounting block 5 is an arc tangent plane, the other surface is a plane, the arc tangent plane is matched with the outer diameter of the mounting and supporting seat 1, and an annular limiting groove 13 is formed in the plane and matched with the adjustable mass block 4 to limit the hollow damping spring 7; the bottom mounting block 5 is also provided with a through hole consistent with the mounting screw 6;
when the damping device is positioned on the outer side, one end of the hollow damping spring 7 is arranged in the annular limiting groove 13 of the adjustable mass block 4, and the other end of the hollow damping spring is installed in a limiting mode through the limiting installation disc 3. The limiting disc 3 is provided with a through hole with the diameter consistent with that of the mounting screw 6, and one surface of the limiting disc 3 is provided with an annular limiting groove 13 for limiting the hollow damping spring 7. The limiting disc 3 is made of metal materials and can be installed and limited through an upper nut 11 and a lower nut 11.
The bottom mounting block 5 is tightly fixed on the mounting support base 1 through a trapezoidal nut 9 and a nut 11, and the mass spring damping piece is tightly fixed on the mounting support base 1 through a mounting screw 6, wherein the trapezoidal nut 9 is made of steel. As shown in fig. 6-7.
The direction of the mass spring damping part is adjusted by adjusting the installation position of the trapezoidal nut 9 on the arc installation groove 10, so that the vibration participating direction of the multidirectional adjustable tuned dynamic damper reaches a proper state, the position of the limiting disc 3 is adjusted by adjusting the nut 11, so that the rigidity of the mass spring damping part is adjusted, the vibration participating mass of a certain part of the mass spring damping part can be adjusted by adjusting the weight of the adjustable mass block 4, further, the natural frequency of the mass spring damping part is adjusted, the hollow damping spring 7 can also use a conical hollow damping spring with adjustable rigidity besides a figure spring as shown in figures 8-9, wherein the spring adopts rubber or other damping materials as filling materials of the hollow part, the rigidity of the mass spring damping part can be adjusted by adjusting the expansion amount of the conical hollow damping spring, the position of the nut 11 close to the adjustable mass block 4 can be adjusted to play a role of a limiting mark when the rigidity is adjusted, so that the upper part is tightly installed, the rigidity of the hollow damping spring 7 can be adjusted relatively, the rigidity of the hollow spring can be adjusted, the rigidity of the mass spring damping part can be adjusted, and the effect of the same frequency of the damping part of the natural frequency of the mass spring damping spring can be controlled by adjusting the natural frequency.
The multi-direction adjustable tuned dynamic damper can be provided with a plurality of mass spring damping parts with different vibration participating directions and different natural frequencies, so that the multi-direction adjustable tuned dynamic damper can play a good role in inhibiting the vibration of a certain main vibration system in different directions and different frequencies under the conditions of more compactness and less occupied volume.
If a certain traction equipment supporting I-shaped steel beam is subjected to vibration reduction, firstly, modal simulation calculation is carried out on the I-shaped steel beam to obtain a 1200Hz internal mode vibration mode and modal frequency of the I-shaped steel beam, a multidirectional adjustable dynamic damper is selected to be installed at the middle position of the I-shaped steel beam according to a modal calculation result, modal calculation is carried out on the installed I-shaped steel beam, after the multidirectional adjustable dynamic damper is installed according to the calculation result, a mode vibration mode of the beam under the main vibration frequency can be obtained according to modal experiment and theoretical modal analysis of the beam, the installation position of the beam on a main vibration system is selected according to the mode vibration mode under the main vibration frequency band, then, the position of the multidirectional adjustable tuned dynamic damper in the horizontal direction to a trapezoidal nut is adjusted according to the mode vibration mode to enable the anisotropic vibration direction to be matched with the position of a peak of the mode vibration mode, and further, rigidity and mass adjustment are carried out on different mass-spring-damping systems of the multidirectional adjustable tuned dynamic damper according to the modal vibration mode frequency corresponding to the modal vibration mode, so that the proper natural frequency of the mass-spring-damping system is achieved, and a good main vibration effect is achieved.
For example, when a certain transport machinery supports and connects a beam for vibration reduction, firstly, modal calculation is performed on the beam to obtain modal vibration modes of the beam under different order modal frequencies, and then frequency response curves of the beam under vertical, transverse and longitudinal excitation are obtained, as shown in solid line portions of fig. 13 to 15, according to the frequency response curves, the vertical maximum response frequency is 165Hz, the transverse maximum response frequency is 281Hz, the longitudinal maximum response frequency is 442Hz, and the corresponding modal vibration modes under the frequencies are shown in fig. 10 to 12.
The multidirectional adjustable tuned dynamic damper is installed in the middle of the beam according to the mode shape selection, three mass-spring-damping systems are installed in the vertical direction, the longitudinal direction and the transverse direction of the beam, 165Hz frequency modulation is performed on the vertical mass-spring-damping system according to the calculation result, 280Hz frequency modulation is performed on the transverse mass-spring-damping system, and 440Hz frequency modulation is performed on the longitudinal mass-spring-damping system. Fig. 13 to 15 are comparison graphs of vertical, lateral and longitudinal frequency response curves under vertical, lateral and longitudinal excitations before and after installation of the multidirectional adjustable tuned dynamic damper, wherein a solid line is frequency response characteristics under different excitations before installation of the multidirectional adjustable tuned dynamic damper, and a dotted line is frequency response characteristics under different excitations after installation of the multidirectional adjustable tuned dynamic damper.
Claims (7)
1. The multidirectional adjustable tuned dynamic damper is characterized by comprising an installation support seat (1) and a plurality of mass spring damping pieces, wherein the mass spring damping pieces are vertically or horizontally installed on the installation support seat (1), each mass spring damping piece comprises an adjustable mass block (4) and a hollow damping spring (7), and the vibration of different frequencies in different directions is controlled by adjusting the number and the installation positions of the mass spring damping pieces on the installation support seat (1), selecting the mass of the adjustable mass block (4) and selecting the rigidity of the hollow damping spring (7);
the installation supporting seat (1) comprises a supporting plate and an annular installation seat arranged on the supporting plate, wherein a damper installation hole (8) is formed in the supporting plate, and the multidirectional adjustable tuned dynamic damper is tightly fixed on the main vibration equipment;
each mass spring damping piece is arranged on an annular mounting seat, and the annular mounting seat is provided with a mounting hole (12) for vertically mounting the mass spring damping piece and an arc mounting groove (10) for horizontally mounting the mass spring damping piece;
the radian of the arc mounting groove (10) is 60-120 degrees, and the horizontal covering in the 360-degree vibration participating direction is realized by selecting the mounting position of the arc mounting groove (10) on the mounting support seat (1);
the annular mounting seat of the mounting and supporting seat (1) is also provided with a bottom mounting block (5), one surface of the bottom mounting block (5) is an arc-shaped tangent plane, the other surface is a plane, the arc-shaped tangent plane is matched with the outer diameter of the mounting and supporting seat (1), and an annular limiting groove (13) is arranged at the plane and matched with the adjustable mass block (4) to limit the hollow damping spring (7);
the bottom mounting block (5) is tightly fixed on the mounting and supporting seat (1) through a trapezoidal nut (9) and a nut (11).
2. The multi-directional adjustable tuned dynamic damper according to claim 1, wherein said mass spring damper is tightly fixed on the mounting seat (1) by means of a mounting screw (6) and a matching nut.
3. The tuned multi-directional adjustable dynamic damper according to claim 1, wherein said adjustable mass (4) is centrally provided with a central hole for mounting, and a mounting screw (6) is passed through said central hole to fix the mass spring damper to the mounting seat (1).
4. The multi-directional adjustable tuned dynamic damper according to claim 1 or 3, wherein symmetrical annular limiting grooves (13) are formed on both sides of the adjustable mass block (4), and the hollow damping springs (7) are located on both sides of the adjustable mass block (4) and are limited by the annular limiting grooves (13);
symmetrical through holes are further formed in the two sides of the adjustable mass block (4), and when a plurality of mass blocks are selected according to different frequencies to be stacked for use, the mass blocks are connected and fixed through the screw nuts and the through holes in the mass blocks in a matching mode.
5. The multi-directionally adjustable tuned dynamic damper according to claim 1, wherein said hollow damping springs (7) are located inside and outside the adjustable mass (4),
when the damping spring is positioned at the inner side, the adjustable mass block (4) and the mounting support seat (1) are respectively provided with an annular limiting groove (13) for limiting the hollow damping spring (7);
when the damping spring is positioned on the outer side, one end of the hollow damping spring (7) is arranged in the annular limiting groove (13) of the adjustable mass block (4), and the other end of the hollow damping spring is installed in a limiting mode through the limiting disc (3).
6. The tuning dynamic damper with adjustable multiple directions as claimed in claim 5, wherein the limiting disc (3) has a through hole with a diameter consistent with that of the mounting screw (6), and one surface of the limiting disc (3) is provided with an annular limiting groove (13).
7. The multi-directional adjustable tuned dynamic damper according to claim 1, wherein said mounting seat (1) is made of metal material,
the adjustable mass block (4) is made of steel or lead materials;
the hollow damping spring (7) is made of spring steel materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110661104.7A CN113464603B (en) | 2021-06-15 | 2021-06-15 | Tuning dynamic damper with adjustable it is multidirectional |
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| CN202110661104.7A CN113464603B (en) | 2021-06-15 | 2021-06-15 | Tuning dynamic damper with adjustable it is multidirectional |
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| WO2023071321A1 (en) * | 2021-10-29 | 2023-05-04 | 广东美的制冷设备有限公司 | Damping assembly and vibration device provided with same |
| CN114370532A (en) * | 2022-01-11 | 2022-04-19 | 福州大学 | Variable-mass dynamic vibration absorber suitable for high-temperature pipeline and assembling method |
| CN115163724A (en) * | 2022-08-11 | 2022-10-11 | 重庆大学 | Magneto-rheological inertia damper |
| CN117570066B (en) * | 2024-01-16 | 2024-03-29 | 杭州新亚低温科技有限公司 | Vibration suppression system and method for high-power high-lift low-temperature pump rotor |
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