CN220930533U

CN220930533U - Tuned mass damper

Info

Publication number: CN220930533U
Application number: CN202322983412.9U
Authority: CN
Inventors: 段权; 黄孝波
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2023-11-06
Filing date: 2023-11-06
Publication date: 2024-05-10
Anticipated expiration: 2033-11-06

Abstract

The utility model belongs to the technical field of vibration control, and relates to a tuned mass damper, which comprises a connecting component, a damping component and a damping component, wherein the connecting component is used for being sleeved on an instrument connecting pipe to be damped; the even number of cantilever beams are uniformly distributed on the periphery of the connecting assembly, and one end of each cantilever beam is connected with the connecting assembly; the tuning mass blocks are vertically arranged at the other end of the cantilever beams, and the positions of the tuning mass blocks on the cantilever beams are adjustable. When the instrument connecting pipe with different natural frequencies is changed, the natural frequency of the damper can be conveniently and effectively adjusted by adjusting the position of the tuning mass block on the cantilever beam in real time, the instrument connecting pipe has good vibration damping effect on vibration in any direction, the structure is simple, the manufacturing cost is low, the disassembly and assembly are convenient, and the labor, material resources, financial resources and time cost consumed in the installation process are greatly reduced.

Description

Tuned mass damper

Technical Field

The utility model belongs to the technical field of vibration control, and particularly relates to a tuned mass damper.

Background

On the energy chemical industry device, widely used is instrument wind connection pipe and the detection branch pipe that the pipe diameter is not more than 2 inches, namely 5.08cm, and instrument wind connection pipe and the effect of detecting the branch pipe have three, and first is used for providing compressed air for pneumatic instrument, and second is used for the circulation of working medium, and third is the state such as pressure, flow etc. that detects the working medium.

The mechanical vibration excitation is generated on the pipeline of the machine pump equipment of the pipeline system in a starting state, in addition, working fluid flowing in the instrument wind connection pipe and the detection branch pipe also pulsates, the instrument wind connection pipe and the detection branch pipe vibrate under the combined action of the mechanical vibration excitation and the detection branch pipe, the instrument wind connection pipe and the detection branch pipe are small in pipe diameter and small in rigidity, the mechanical vibration excitation device has a large amplification effect on the vibration of the pipeline supported by the instrument, more severe vibration is generated, and fatigue cracking or welding failure is easily generated on welding seams and joints of the connection parts of the thin branch pipe and the instrument connection pipe and peripheral parts, so that potential safety hazards are extremely large.

Aiming at the vibration control problem of the instrument wind connection pipe and the detection branch pipe on the energy chemical device, the method used at the present stage is to add pipe clamps on the instrument wind connection pipe, the detection branch pipe, the thin branch pipe and the instrument connection pipe to restrain the vibration of the pipe, but because the pipe is long, the pipe clamps which need to be added are many, and meanwhile, many positions have no fixable point, so the consumed labor, material resources, financial resources and time cost are relatively high, and the vibration reduction effect is not high.

Disclosure of utility model

In view of the above, the utility model provides a tuned mass damper which can conveniently and effectively adjust the natural frequency, thereby achieving good vibration reduction effect. Meanwhile, the tuned mass damper is simple in structure, low in manufacturing cost and convenient to assemble and disassemble, and the labor, material and financial resources and time costs consumed in the installation process are greatly reduced.

The technical scheme of the utility model is as follows:

A tuned mass damper comprising:

the connecting component is used for being sleeved on the instrument connecting pipe to be damped;

The even number of cantilever beams are uniformly distributed on the periphery of the connecting assembly, and one end of each cantilever beam is connected with the connecting assembly;

The tuning mass blocks are vertically arranged at the other end of the cantilever beams, and the positions of the tuning mass blocks on the cantilever beams are adjustable.

Preferably, the cantilever beam comprises a barrel body, the barrel body is provided with a central axis, the central axis is perpendicular to the central axis of the instrument connecting pipe to be damped, the cross section of the barrel body is rectangular, one end of the barrel body is fixedly connected with a clamping block, at least one outer wall of the barrel body is provided with a plurality of uniformly distributed bosses, a plurality of bosses are sequentially arranged in a linear array mode, and the bosses are used for limiting the tuning mass block.

Preferably, the cross section of the boss is a right triangle, and the base angle of the right triangle is 75-80 degrees.

Preferably, the base angle of the right triangle is 78 °.

Preferably, the tuning mass block comprises a rectangular block body, a limiting hole is formed in the middle of the rectangular block body, the limiting hole is matched with the cylinder body, a plurality of clamping grooves are uniformly distributed in the circumferential direction of the limiting hole, and the clamping grooves are matched with the boss.

Preferably, the connecting component comprises a first fastener and a second fastener, one ends of the first fastener and the second fastener are hinged, and the other ends of the first fastener and the second fastener are detachably connected; the space that the opposite one side of first fastener and second fastener encloses the synthesis is the cylindricality, encloses the space that the synthesis is used for with wait that the shock attenuation instrument takes over the matching, be equipped with a plurality of mounting groove structures of symmetrical arrangement on the cylindricality, mounting groove structure be used for with clamping piece matches.

Preferably, the concave surfaces of the first fastener and the second fastener are respectively provided with an annular groove, and a damping piece is arranged in the annular grooves.

Preferably, the damping member is one of a rubber or nylon damping ring.

Preferably, the first fastener and the second fastener are detachably connected with one end provided with a clamping groove structure respectively, and the clamping groove structure is internally provided with a connecting sheet.

Preferably, the number of the mounting groove structures is four, and the included angle between two adjacent mounting groove structures is 90 degrees.

Compared with the prior art, the tuning mass damper provided by the utility model solves the problem of forced vibration of an instrument connecting pipe by utilizing an anti-resonance thought, adopts a combination mode of vertically arranging the cantilever beam and the tuning mass blocks as a basic structure of a damping component, uniformly distributes a plurality of groups of damping components on the periphery of the pipe to be damped, can play a good role in damping vibration of the instrument connecting pipe in any direction, and can conveniently and effectively adjust the natural frequency of the damper by adjusting the position of the tuning mass block on the cantilever beam in real time when the main vibration frequency of the instrument connecting pipe changes so as to achieve a good damping effect again. Meanwhile, the tuned mass damper is simple in structure, low in manufacturing cost and convenient to assemble and disassemble, the labor, material resources, financial resources and time cost consumed in the installation process are greatly reduced, and the tuned mass damper is high in practicability and worthy of popularization.

Drawings

Fig. 1 is a front view of the overall structure of the present utility model.

Fig. 2 is a left side view of the overall structure of the present utility model.

Fig. 3 is a front view of the structure of the cantilever beam of the present utility model.

Fig. 4 is a left side view of the structure of the cantilever beam of the present utility model.

Fig. 5 is a top view of the structure of the cantilever beam of the present utility model.

Fig. 6 is a front view of a tuning mass of the present utility model.

Fig. 7 is a B-B cross-sectional view of the tuning mass of the present utility model.

Fig. 8 is a cross-sectional view A-A of the tuning mass of the present utility model.

Detailed Description

In the energy chemical device, a meter wind connecting pipe and a detection branch pipe with the pipe diameter not more than 2 inches, namely 5.08cm are mostly used, two functions of the meter wind connecting pipe and the detection branch pipe are used, the first function is used for connecting pipeline machinery, the second function is used for circulating working media, and the third function is used for conveniently detecting states of the working media such as pressure, flow and the like.

Because the pump equipment of the pipeline system has self vibration under the starting state, in addition, working fluid flowing in the instrument wind connection pipe and the detection branch pipe also has pulsation, the instrument wind connection pipe and the detection branch pipe can be excited by mechanical vibration under the combined excitation action of the self vibration, and the instrument wind connection pipe and the detection branch pipe are also connected with a thin branch pipe and an instrument connection pipe, the rigidity of the thin branch pipe and the instrument connection pipe is smaller, and the vibration on the instrument wind connection pipe and the detection branch pipe has larger amplification effect on vibration, so the vibration generated by the thin branch pipe and the instrument connection pipe connected on the instrument wind connection pipe and the detection branch pipe is more intense, and the intense vibration can cause fatigue cracking or welding failure of welding joints of the thin branch pipe and the connection part of the instrument connection pipe and peripheral parts, thereby causing potential safety hazards.

Aiming at the vibration control problem of the instrument wind connection pipe and the detection branch pipe on the energy chemical device, the method used at the present stage is to add pipe clamps on the instrument wind connection pipe, the detection branch pipe, the thin branch pipe and the instrument connection pipe to restrain the vibration of the pipe.

However, because the pipelines are many and long, the pipe clamps are many to be additionally arranged, and meanwhile, many positions are not provided with fixing points, so that the cost of consumed manpower, material resources, financial resources and time is relatively high, and experiments and practices prove that the vibration reduction effect under the operation mode is not very good. Based on this, the present utility model provides a tuned mass damper, specifically for vibration control problems of pipe-like structures, and is described below with reference to the schematic structural diagrams of fig. 1 to 8.

Example 1

As shown in fig. 1 and 2, the tuned mass damper provided by the present utility model is used for controlling vibration problems of a tube structure, especially for instrument tubes, and has no damper for damping vibration, and the tuned mass damper comprises a connecting component 1 for connecting with the instrument tube to be damped and a plurality of groups of damping components 2, wherein the connecting component 1 is sleeved on the instrument tube to be damped, the groups of damping components 2 are symmetrically arranged on the periphery of the connecting component 1, and each group of damping components 2 comprises a cantilever beam 21 and a tuning mass block 22. The total number of the cantilever beams 21 is even, the cantilever beams 21 are uniformly distributed on the periphery of the connecting assembly 1, the total number of the tuning mass blocks 22 is also even, the tuning mass blocks are in one-to-one correspondence with the even number of the cantilever beams 21, one end of each cantilever beam 21 is connected with the connecting assembly 1, the tuning mass blocks 22 are vertically arranged at the other end of each cantilever beam 21, the positions of the tuning mass blocks 22 on the cantilever beams 21 can be adjusted, the combined mode of the vertical arrangement of the cantilever beams 21 and the tuning mass blocks 22 is used as a basic structure of the damping assembly, and the symmetrical arrangement mode can be utilized to play a good role in damping vibration of an instrument connection pipe in any direction.

As shown in fig. 6 to 8, the tuning mass 22 includes a rectangular block 221, a limiting hole 222 is formed in the middle of the rectangular block 221, the limiting hole 222 is matched with the cylinder 211, a plurality of clamping grooves are uniformly distributed in the circumferential direction of the limiting hole 222, and the clamping grooves are matched with the boss 213. The general shape and material of the tuning mass block 22 are not particularly required, only the middle open pore structure is required to be matched with the cantilever beam 21, the weight of the tuning mass block 22 accords with the design requirement, the limit hole 222 is a circular open pore, the diameter of the circular open pore is equal to the width of the cantilever beam 21, the left clamping groove and the right clamping groove of the circular open pore are matched with the boss 213 on the cantilever beam 21, and the position of the tuning mass block 22 on the cantilever beam 21 can be adjusted when the circular open pore rotates to the vertical direction, so that the natural frequency of the tuning mass damper, namely TMD, is changed. The upper groove of the circular opening is in interference fit with the thickness of the cantilever beam 21, when the tuning mass 22 reaches between the pair of bosses 213, the tuning mass is rotated to the upper part and pressed downwards, and is fastened on the cantilever beam 21, so that the tuning mass 22 cannot loosen in the whole vibration process, and the structure is shown in fig. 1.

The rectangular section cantilever type tuned mass damper is assembled, the whole structure diagram is shown in fig. 1 and 2, and the cantilever beams 21 are arranged in a mode of being perpendicular to each other, so that good vibration damping effect can be achieved on vibration of the instrument connecting pipe in any direction.

The connecting assembly 1 comprises a first fastener 11 and a second fastener 12, the cross sections of the first fastener 11 and the second fastener 12 are semi-annular, the concave surfaces of the first fastener 11 and the second fastener 12 are arranged oppositely, a space for surrounding the space is cylindrical, the space for surrounding the space is used for matching with the outer diameter of the instrument adapter to be damped, one ends of the first fastener 11 and the second fastener 12 are hinged, and the other ends of the first fastener 11 and the second fastener 12 are detachably connected.

As shown in fig. 1, specifically, to enable the first fastening member 11 and the second fastening member 12 to rotate, one ends of them are connected by a screw nut through a male-type transition fit, and a gap is left between the connection ends to facilitate their rotation about the connection shaft. The other ends of the first fastener 11 and the second fastener 12 are fastened by a buckle, the structure of the buckle can be that a clamping groove structure is respectively arranged at the buckle connecting ends of the first fastener 11 and the second fastener 12, a connecting sheet is inserted into the clamping groove structure, the buckling mode is realized by the stress deformation of the connecting sheet and the recovery of the connecting sheet when the connecting sheet is not stressed, and the pipe vibration can not lead the connecting sheet to be separated.

In order to achieve the dual purposes of skid resistance and vibration reduction, annular grooves are respectively formed in the concave surfaces of the first fastener 11 and the second fastener 12, and damping elements are arranged in the annular grooves.

Specifically, the damping member is one of a rubber or nylon damping ring.

In addition, a plurality of mounting groove structures which are symmetrically arranged are further formed in the first fastener 11 and the second fastener 12, four mounting groove structures are formed, an included angle between two adjacent mounting groove structures is 90 degrees, and the mounting groove structures are connected with one end of the cantilever beam 21 in a matched mode.

As shown in fig. 3 to 5, the cantilever beam 21 includes a cylinder 211, one end of the cylinder 211 is fixedly connected with a clamping block 212 matched with the mounting groove structure, the cross section of the cylinder 211 is rectangular, at least one outer wall of the cylinder 211 is provided with a plurality of uniformly distributed bosses 213, the bosses 213 are sequentially arranged in a linear array manner, and the bosses 213 are used for limiting the movement of the tuning mass 22. The clamping block 212 at one end of the cantilever beam 21 is in interference fit with the mounting groove structures on the first fastener 11 and the second fastener 12, so that the cantilever beam 21 can be prevented from loosening, the other end of the cantilever beam 21 is used as the cantilever beam 21 to extend out and be connected with the tuning mass block 22, and the matching section is slightly wider and thicker than the extending section, so that the extending section can extend out, and the structure is similar to a bolt type structure. The elastic modulus of the cantilever beam 21 is related to the material thereof, and can be reasonably selected according to the actual situation or the requirement in the design process.

Specifically, the cross-section of the boss 213 is a right triangle, the base angle of which is 75 ° -80 °, preferably 78 °.

The utility model solves the problem of forced vibration of the instrument connecting pipe by utilizing the antiresonance thought, and can conveniently and effectively adjust the natural frequency of the damper when the main vibration frequency of the instrument connecting pipe changes so as to achieve good vibration reduction effect again. Meanwhile, the tuned mass damper is simple in structure, low in manufacturing cost and convenient to assemble and disassemble, the labor, material resources, financial resources and time cost consumed in the installation process are greatly reduced, and the tuned mass damper is high in practicability and worthy of popularization.

The foregoing disclosure is merely illustrative of preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto, and any variations within the scope of the present utility model will be within the scope of those skilled in the art.

Claims

1. Tuning mass damper, characterized in that it comprises:

The connecting component (1) is used for being sleeved on the instrument connecting pipe to be damped;

The even number of cantilever beams (21) are uniformly distributed on the periphery of the connecting assembly (1), and one end of each cantilever beam (21) is connected with the connecting assembly (1);

The tuning mass blocks (22) are in one-to-one correspondence with the cantilever beams (21), the tuning mass blocks (22) are vertically arranged at the other end of the cantilever beams (21), and the positions of the tuning mass blocks (22) on the cantilever beams (21) are adjustable.

2. The tuned mass damper according to claim 1, wherein the cantilever beam (21) comprises a cylinder (211), the cylinder (211) has a central axis, the central axis is perpendicular to the central axis of the instrument adapter tube to be damped, the cross section of the cylinder (211) is rectangular, one end of the cylinder (211) is fixedly connected with a clamping block (212), a plurality of uniformly distributed bosses (213) are arranged on at least one outer wall of the cylinder (211), a plurality of the bosses (213) are sequentially arranged in a linear array, and the bosses (213) are used for limiting the tuning mass block (22).

3. Tuned mass damper according to claim 2, wherein the cross-section of the boss (213) is a right triangle, the base angle of which is 75 ° -80 °.

4. A tuned mass damper according to claim 3, wherein the base angle of the right triangle is 78 °.

5. A tuned mass damper according to claim 3, wherein the tuning mass (22) comprises a rectangular block (221), a limiting hole (222) is formed in the middle of the rectangular block (221), the limiting hole (222) is matched with the cylinder (211), a plurality of clamping grooves are uniformly distributed in the circumferential direction of the limiting hole (222), and the clamping grooves are matched with the boss (213).

6. The tuned mass damper according to claim 5, wherein the connection assembly (1) comprises a first clasp (11) and a second clasp (12), one end of the first clasp (11) and one end of the second clasp (12) being hinged and the other end being detachably connected; the space that the opposite one side of first fastener (11) and second fastener (12) encloses the synthesis is the cylindricality, encloses the space that the synthesis is used for with wait that the shock attenuation instrument takes over the matching, be equipped with a plurality of mounting groove structures of symmetrical arrangement on the cylindricality, mounting groove structure be used for with clamping piece (212) match.

7. Tuned mass damper according to claim 6, characterized in that the concave surfaces of the first and second fastening members (11, 12) are provided with annular grooves, respectively, in which damping members are arranged.

8. The tuned mass damper of claim 7, wherein the damping member is one of a rubber or nylon damping ring.

9. The tuned mass damper according to claim 7, wherein the first fastening member (11) and the second fastening member (12) are detachably connected to each other with a clamping groove structure, and the clamping groove structure is internally provided with a connecting piece.

10. The tuned mass damper of claim 6, wherein there are four of the mounting groove structures and an included angle between two adjacent mounting groove structures is 90 °.