CN214661710U - Multi-degree-of-freedom dynamic vibration absorber - Google Patents
Multi-degree-of-freedom dynamic vibration absorber Download PDFInfo
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- CN214661710U CN214661710U CN202120991019.2U CN202120991019U CN214661710U CN 214661710 U CN214661710 U CN 214661710U CN 202120991019 U CN202120991019 U CN 202120991019U CN 214661710 U CN214661710 U CN 214661710U
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- dynamic vibration
- vibration absorber
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Abstract
The utility model discloses a multi freedom dynamic vibration absorber, include: a mounting base and a mounting support plate; a plurality of vibration reduction dampers are vertically fixed on the top of the mounting base in an annular array, and an elastic rod is vertically fixed at the center of the top of the mounting base; the mounting plate level is fixed a plurality of between the expansion end of damping damper, the vertical fixation has a plurality of clamping screw on the mounting plate, still pile up a plurality of quality pieces on the mounting plate, and a plurality of quality pieces cup joint on clamping screw and the elastic rod, the utility model discloses realize that the dynamic vibration of a plurality of directions shakes, and can realize the quick adjustment of bump leveller frequency through adding and subtracting the quality piece, further quality piece is fixed through the synchronous mount of a plurality of connecting screw cooperation, when adjustment quality piece quantity, can adjust adjusting nut on a plurality of clamping screw in step through synchronous mount, realizes fixing fast or dismantling the quality piece.
Description
Technical Field
The utility model relates to a dynamic vibration absorber technical field especially relates to a multi freedom dynamic vibration absorber.
Background
Vibration is a main monitoring index of the rotary machine, and the size of the vibration index is a key factor for restricting the long-term safe and stable operation of the rotary machine. Rotating machinery, such as turbo generator, frequency conversion congeal the pump, there are the structural vibration problem of different degrees many, and equipment stator shell natural frequency and rotor rotational frequency overlap and induce the unusual increase of rotating equipment stator shell vibration promptly, then lead to the bearing to damage seriously, structural connection part fracture scheduling problem seriously increases the operation risk of equipment. The dynamic vibration absorber is a device for reducing the vibration of an object by absorbing the vibration energy of the object by using a resonance system, and is widely applied to the engineering field, such as tall buildings, bridges and the like. When the vibration of the rotating mechanical structure occurs, the phenomena of large vibration of the bearing shell and the stator shell and small vibration of the rotor are often generated. To reduce rotary machine stator housing vibrations.
The invention has the specific structure that the invention patent with the granted publication number of CN108980272B, the granted publication date of 2020.06.16 and the name of 'a dynamic vibration absorber' comprises a first vibration absorbing assembly and a second vibration absorbing assembly, wherein the first vibration absorbing assembly comprises an upper mass block and an elastic support, the upper mass block is detachably arranged on the elastic support, the second vibration absorbing assembly comprises a rubber block and a lower mass block, the lower mass block is positioned in the elastic support, the rubber block is arranged between the elastic support and the lower mass block, and the rubber block is detachably connected with the lower mass block.
The prior art that includes the above-mentioned application weak point lies in, carries out the damping to the vibration of a direction more, but if vertical congeal the pump and take place structural vibration time, the vibration of a plurality of directions shell all can increase, can't realize multi-directionally carrying out the damping, can't realize the quick adjustment of bump leveller frequency simultaneously, and it is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a multi-degree-of-freedom dynamic vibration absorber, which realizes dynamic vibration absorption in multiple directions and can realize quick adjustment of the frequency of the vibration absorber by adding and subtracting mass blocks.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a multiple degree of freedom dynamic vibration absorber comprising: a mounting base and a mounting support plate;
a plurality of vibration reduction dampers are vertically fixed on the top of the mounting base in an annular array, and an elastic rod is vertically fixed at the center of the top of the mounting base;
the mounting support plate is horizontally fixed between the movable ends of the vibration reduction dampers, a plurality of fixing screw rods are vertically fixed on the mounting support plate, a plurality of mass blocks are stacked on the mounting support plate and sleeved on the fixing screw rods and the elastic rods, and fixing nuts are sleeved on the fixing screw rods in a spiral mode.
As a further description of the above technical solution:
and the four corner positions at the bottom of the mounting base are fixedly provided with mounting side frames when inclining, and mounting screw holes are formed in the bottoms of the mounting side frames.
As a further description of the above technical solution:
lifting lugs are fixedly connected to four corner positions at the top of the mounting base.
As a further description of the above technical solution:
and a plurality of mass blocks are fixed at the bottom of the mounting supporting plate through fixing screws.
As a further description of the above technical solution:
the plurality of fixing screws are positioned at the top of the mounting supporting plate and distributed in an annular array.
As a further description of the above technical solution:
the device also comprises a synchronous fixed frame;
the synchronous fixing frame is sleeved on the plurality of fixing screw rods, so that the mass blocks on the mounting supporting plate can be synchronously fixed and detached.
As a further description of the above technical solution:
synchronous mount includes two annular frame of parallel arrangement, and two angular rotation inlays between the annular frame and is equipped with a plurality of adjusting nut, two the inboard still rotates between the annular frame and is provided with annular adjusting bracket, annular adjusting bracket is used for synchronous drive a plurality of adjusting nut rotates.
As a further description of the above technical solution:
the peripheral face of the adjusting nut is provided with adjusting convex teeth, the peripheral side of the annular adjusting frame is provided with driving convex teeth, and the driving convex teeth are meshed with the adjusting convex teeth.
The utility model provides a multi freedom dynamic vibration absorber. The method has the following beneficial effects:
this multi freedom dynamic vibration absorber is when using, fix it on the stator shell of rotary equipment, realize resonance on transferring the energy that the rotary machine structure vibration produced to the dynamic vibration absorber, the reaction force that produces during resonance can make rotary machine structure's vibration reduce, in order to reach the purpose that reduces rotary machine shell vibration, realize the dynamic vibration absorption of a plurality of directions, and can realize the quick adjustment of bump leveller frequency through adding and subtracting the quality piece, further quality piece is fixed through the synchronous mount of a plurality of connecting screw rod cooperations, when adjusting the quality piece quantity, can adjust adjusting nut on a plurality of fixing screw rod through synchronous mount in step, realize carrying out quick fixation or dismantlement to the quality piece, convenient operation is high-efficient.
Drawings
Fig. 1 is a schematic view of the overall structure of a multi-degree-of-freedom dynamic vibration absorber provided by the present invention;
fig. 2 is a front view of the multi-degree-of-freedom dynamic vibration absorber provided by the present invention;
FIG. 3 is a schematic structural view of the synchronous fixing frame of the present invention;
fig. 4 is the assembly structure diagram of the middle synchronous fixing frame of the present invention.
Illustration of the drawings:
1. installing a base; 2. a vibration-damping damper; 3. mounting a supporting plate; 4. fixing the screw rod; 5. a mass block; 6. fixing a nut; 7. an elastic rod; 8. installing a side frame; 9. lifting lugs; 10. a synchronous fixing frame; 101. adjusting the nut; 102. an annular frame; 103. adjusting the convex teeth; 104. an annular adjusting bracket; 105. a drive lobe; 106. a handle bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, a multiple degree of freedom dynamic vibration absorber includes: a mounting base 1 and a mounting support plate 3; a plurality of vibration reduction dampers 2 are vertically fixed on the top of the mounting base 1 in an annular array, and an elastic rod 7 is vertically fixed at the center of the top of the mounting base 1; the level of installation layer board 3 is fixed between the expansion end of a plurality of damping attenuator 2, and the elastic rod 7 runs through and extends to the outside with installation layer board 3, and the vertical fixation has a plurality of fixing screw 4 on the installation layer board 3, has still piled up a plurality of quality pieces 5 on the installation layer board 3, and a plurality of quality pieces 5 cup joints on fixing screw 4 and elastic rod 7, and the spiral shell has cup jointed fixation nut 6 on fixing screw 4.
Specifically, the multiple degree of freedom dynamic vibration absorber provided by this embodiment is used for vibration damping of a rotary machine structure, when in use, the vibration frequency of rotary equipment is detected by a vibration detector, the mounting base 1 is fixed on a stator housing of the rotary equipment, a reasonable number of mass blocks 5 are selected according to the vibration frequency of the rotary equipment, so that the frequency of the multiple degree of freedom dynamic vibration absorber is consistent with the vibration frequency of the rotary machine structure, and thus, energy generated by vibration of the rotary machine structure is transferred to the dynamic vibration absorber, so as to achieve the purpose of reducing vibration of the rotary machine housing, vibration damping in multiple directions of 360 degrees is realized at the same time, and quick adjustment of the frequency of the vibration absorber can be realized by adding and subtracting the mass blocks, and further, quick adjustment of the frequency of the vibration absorber is realized by a frequency calculation formula
It can be qualitatively thought that the vibration absorber frequency is in direct proportion to the rigidity and in inverse proportion to the vibration mass, and the frequency can be adjusted by adding or subtracting the mass block 5.
The four corners of the bottom of the mounting base 1 are fixed with mounting side frames 8 when inclining, and mounting screw holes are arranged at the bottom of the mounting side frames 8. Furthermore, when the mounting base 1 is fixed on the stator housing of the rotating equipment, the mounting base is mounted through the mounting side frames 8 connected at the four corner positions at the bottom of the mounting base 1, and the mounting side frames are matched with mounting screw holes at the bottom of the mounting side frames 8 and are fixed through studs.
In another embodiment, a plurality of fixing screws 4 are located at the top of the mounting plate 3 and distributed in a circular array. Also comprises a synchronous fixed mount 10; the synchronous fixing frame 10 is sleeved on the plurality of fixing screw rods 4, so that the mass blocks 5 on the mounting supporting plate 3 can be synchronously fixed and detached. The synchronous fixing frame 10 comprises two annular frames 102 which are arranged in parallel, a plurality of adjusting nuts 101 are embedded between the two annular frames 102 in an equal-angle rotating manner, an annular adjusting frame 104 is further rotatably arranged on the inner side between the two annular frames 102, and the annular adjusting frame 104 is used for synchronously driving the plurality of adjusting nuts 101 to rotate. The circumferential surface of the adjusting nut 101 is provided with an adjusting convex tooth 103, the circumferential side of the annular adjusting frame 104 is provided with a driving convex tooth 105, and the driving convex tooth 105 is meshed with the adjusting convex tooth 103.
The vertical fixation has handle pole 106 on the annular alignment jig 104, when fixing a plurality of quality pieces 5 cooperation clamping screw 4 that lie in the mounting plate 3, cup joint a plurality of adjusting nut 101 on the synchronous mount 10 on clamping screw 4, then drive annular alignment jig 104 through handle pole 106 and rotate between two annular frame 102, drive dogtooth 105 that the cooperation was ridden when annular alignment jig 104 rotated acts on and adjusts dogtooth 103 thereby a plurality of adjusting nut 101 of synchronous drive rotate, adjusting nut 101 moves down the realization and fixes the quality piece of cup jointing on clamping screw 4, when needs adjustment quality piece 5 quantity, can drive annular alignment jig 104 reverse rotation through handle pole 106, take off a plurality of adjusting nut 101 in step, thereby can adjust the quantity of quality piece 5, it is more convenient when using.
The working principle is as follows: when the multi-degree-of-freedom dynamic vibration absorber is used, the vibration frequency of rotary equipment is detected through the vibration detector, the multi-degree-of-freedom dynamic vibration absorber is hoisted to the top of the rotary equipment through the lifting lugs 9 fixed at the four corners of the top of the installation base 1, then the installation side frames 8 connected at the four corners of the bottom of the installation base 1 are installed and are matched with the installation screw holes at the bottom of the installation side frames 8 to be fixed on the stator shell of the rotary equipment, a reasonable number of mass blocks 5 are selected according to the vibration frequency of the rotary equipment, so that the frequency of the multi-degree-of-freedom dynamic vibration absorber is consistent with the vibration frequency of a rotary mechanical structure, the energy generated by the vibration of the rotary mechanical structure is transferred to the dynamic vibration absorber, the aim of reducing the vibration of the rotary mechanical shell is achieved, and the vibration in multiple directions of 360 degrees is reduced, mass block 5 is fixed through the synchronous mount 10 of a plurality of fixing screw 4 cooperation, and when 5 quantity of adjustment mass blocks, can adjust adjusting nut 101 on a plurality of fixing screw 4 in step through synchronous mount 10, realize fixing fast or dismantling convenient operation high efficiency mass block 5.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. A multi-degree-of-freedom dynamic vibration absorber is characterized by comprising: a mounting base (1) and a mounting support plate (3);
a plurality of vibration reduction dampers (2) are vertically fixed on the top of the mounting base (1) in an annular array, and an elastic rod (7) is vertically fixed at the center of the top of the mounting base (1);
the mounting support plate (3) is horizontally fixed between the movable ends of the vibration reduction dampers (2), a plurality of fixing screw rods (4) are vertically fixed on the mounting support plate (3), a plurality of mass blocks (5) are stacked on the mounting support plate (3), the mass blocks (5) are sleeved on the fixing screw rods (4) and the elastic rods (7), and fixing nuts (6) are sleeved on the fixing screw rods (4) in a spiral mode.
2. The multi-degree-of-freedom dynamic vibration absorber according to claim 1, wherein the mounting side frames (8) are fixed at four corners of the bottom of the mounting base (1) when the four corners are inclined, and mounting screw holes are formed in the bottom of each mounting side frame (8).
3. The multiple freedom degree dynamic vibration absorber according to claim 1, wherein lifting lugs (9) are fixedly connected to the four corners of the top of the mounting base (1).
4. The multiple degree of freedom dynamic vibration absorber of claim 1, characterized in that the bottom of the mounting plate (3) is further fixed with a plurality of masses (5) by means of fixing screws.
5. The multiple degree of freedom dynamic vibration absorber of claim 1, wherein a plurality of said set screws (4) are located on top of the mounting plate (3) in an annular array.
6. The multiple degree of freedom dynamic vibration absorber of claim 5, further comprising a synchronization fixture (10);
the synchronous fixing frame (10) is sleeved on the plurality of fixing screw rods (4), so that the mass blocks (5) on the mounting supporting plate (3) can be synchronously fixed and detached.
7. The multiple freedom degree dynamic vibration absorber according to claim 6, wherein said synchronous fixed frame (10) comprises two annular frames (102) arranged in parallel, and a plurality of adjusting nuts (101) are embedded between the two annular frames (102) in an equiangular rotation manner, and an annular adjusting frame (104) is further rotatably arranged between the two annular frames (102) at the inner side, and said annular adjusting frame (104) is used for synchronously driving a plurality of adjusting nuts (101) to rotate.
8. The multiple freedom degree dynamic vibration absorber of claim 7 wherein the adjusting nut (101) is provided with adjusting teeth (103) on its circumferential surface, and the annular adjusting frame (104) is provided with driving teeth (105) on its circumferential side, the driving teeth (105) engaging with the adjusting teeth (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120991019.2U CN214661710U (en) | 2021-05-11 | 2021-05-11 | Multi-degree-of-freedom dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120991019.2U CN214661710U (en) | 2021-05-11 | 2021-05-11 | Multi-degree-of-freedom dynamic vibration absorber |
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| Publication Number | Publication Date |
|---|---|
| CN214661710U true CN214661710U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120991019.2U Expired - Fee Related CN214661710U (en) | 2021-05-11 | 2021-05-11 | Multi-degree-of-freedom dynamic vibration absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961019A (en) * | 2022-06-09 | 2022-08-30 | 江西省第十建筑工程有限公司 | Shear wall structure with damping support |
-
2021
- 2021-05-11 CN CN202120991019.2U patent/CN214661710U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961019A (en) * | 2022-06-09 | 2022-08-30 | 江西省第十建筑工程有限公司 | Shear wall structure with damping support |
| CN114961019B (en) * | 2022-06-09 | 2024-03-22 | 江西省第十建筑工程有限公司 | Shear wall structure with shock mount |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211109 |