CN217782438U

CN217782438U - Simple pendulum type frequency modulation mass damper

Info

Publication number: CN217782438U
Application number: CN202221447713.9U
Authority: CN
Inventors: 吕继楠; 陈超
Original assignee: Jiangsu Dingji Energy Engineering Technology Co ltd
Current assignee: Jiangsu Dingji Energy Engineering Technology Co ltd
Priority date: 2022-06-11
Filing date: 2022-06-11
Publication date: 2022-11-11
Anticipated expiration: 2032-06-11

Abstract

The utility model discloses a simple pendulum formula frequency modulation mass damper, including shell, spring damping subassembly, damping subassembly and adjusting part set up in the shell, the damping subassembly includes damping liquid and pendulum, the pendulum is located the damping liquid, adjusting part and pendulum constitute the simple pendulum, the shell is equipped with the support piece of simple pendulum, the relative support piece swing of simple pendulum. The utility model discloses a simple pendulum formula frequency modulation mass damper, overall structure is small and exquisite, can arrange a plurality of around the tower body, is particularly useful for single-pipe tower, fan tower.

Description

Simple pendulum type frequency modulation mass damper

Technical Field

The utility model belongs to the technical field of damping device, specifically a simple pendulum formula frequency modulation mass damper.

Background

A frequency modulation mass damper (TMD) is a classical passive control technology in structural vibration control, and the principle of the TMD is that an additional mass ball or a mass block is driven to swing in the vibration process of a main body structure, seismic energy or wind energy is consumed by the additional damping in the relative motion process of the main body structure and the additional structure, and the influence on a building structure is reduced.

The frequency-modulated mass damper comprises a solid mass, a spring shock absorber, a damper and the like, has mass, rigidity and damping, adjusts the natural vibration frequency of the frequency-modulated mass damper by changing the mass or the rigidity to enable the natural vibration frequency to be close to the basic frequency or the excitation frequency of a main structure as much as possible, and when the main structure vibrates by excitation, the frequency-modulated mass damper generates an inertia force action opposite to the vibration direction of the structure to act on the structure, so that the vibration reaction of the main structure is attenuated and controlled.

However, for tower bodies with high-rise structures such as single-pipe towers and fan towers, the damping is difficult to be realized by arranging the traditional TMD due to the narrow internal space.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in: technical problem to prior art exists, the utility model provides a simple pendulum formula frequency modulation mass damper, overall structure is small and exquisite, can arrange a plurality of around the tower body, is particularly useful for single-pipe tower, fan tower.

In order to solve the technical problem, the utility model provides a technical scheme does:

the utility model provides a simple pendulum formula frequency modulation quality attenuator, includes shell, spring damping subassembly, damping subassembly and adjusting part set up in the shell, damping subassembly includes damping liquid and pendulum, the pendulum is located damping liquid, adjusting part and pendulum constitute the simple pendulum, the shell is equipped with the support piece of simple pendulum, the relative support piece swing of simple pendulum.

As a further improvement of the above technical solution:

preferably, the shell includes upper housing and lower casing, upper housing and lower casing intercommunication, one side of casing is equipped with two flanges down for be connected with tower body structure.

Preferably, the spring shock absorption assembly comprises at least three springs, one end of each spring is connected with the lower shell, and the other end of each spring is connected with the damping assembly.

Preferably, the damping fluid is generally no more than 2/3 of the volume and has a viscosity of 30 to 100000mm2/s.

Preferably, the pendulum bob is hollow, and a counterweight ball is arranged inside the pendulum bob, and the counterweight ball can be iron beads, lead beads or nonmetal particles.

Preferably, the adjusting component comprises a screw rod, a nut, a spherical nut and a locking nut, the shell is further provided with an adjustable cap, the adjustable cap is arranged at the upper end of the upper shell, a supporting plate is arranged in an inner cavity of the adjustable cap, one end of the screw rod is connected with the pendulum bob, and the other end of the screw rod penetrates through the supporting plate to be sequentially connected with the spherical nut and the locking nut.

Preferably, the length of the simple pendulum is adjusted by adjusting the distance between the nut and the lock nut.

The utility model provides a simple pendulum formula frequency modulation mass damper has following advantage compared with prior art:

the utility model discloses a simple pendulum formula frequency modulation mass damper, overall structure is small and exquisite, can arrange a plurality of around the tower body. The length of the simple pendulum, the mass of the pendulum bob and the damping liquid and the rigidity of the spring are adjusted to enable the natural vibration frequency to be as close to the basic frequency or the excitation frequency of the tower body as possible, when external force (wind power) acts on the tower body to generate vibration, the simple pendulum generates movement which is always opposite to that of the tower body, the vibration reaction of the structure is attenuated and controlled, and the damping ratio of the tower body is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the simple pendulum adjustment in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the spring layout in the embodiment of the present invention.

The reference numbers in the figures illustrate:

1. an upper housing; 2. a lower housing; 3. a flange; 4. a spring; 5. damping fluid; 6. a hammer cylinder; 7. a hammer cover; 8. a liquid injection port; 9. a counterweight ball; 10. a central column; 11. a screw; 12. a nut; 13. a spherical nut; 14. locking the nut; 15. the cap can be adjusted; 16. and a support plate.

Detailed Description

The following describes the embodiments of the present invention in detail. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

Fig. 1 to fig. 3 show an embodiment of the single pendulum type fm mass damper of the present invention, the single pendulum type fm mass damper includes a housing, a spring damping assembly, a damping assembly and an adjusting assembly, the spring damping assembly, the damping assembly and the adjusting assembly are disposed in the housing. The shell comprises an upper shell body 1 and a lower shell body 2, wherein the upper shell body 1 is communicated with the lower shell body 2, and the cross section of the upper shell body 1 is smaller than that of the lower shell body 2. One side of the lower shell 2 is provided with two flanges 3 for connection with the tower structure. The lower shell 2 is also provided with a liquid injection port 8.

In this embodiment, the spring damping assembly is located in the lower housing 2 and includes three springs 4, and the springs 4 are uniformly distributed at 120 degrees. Spring 4 one end is connected with lower casing 2, and the other end is connected with damping component.

In the embodiment, the damping component comprises damping liquid 5 and a pendulum bob, the damping liquid 5 is arranged in the inner cavity of the lower shell 2, the liquid level of the damping liquid 5 does not exceed the top of the pendulum bob, the damping liquid 5 is poured from the liquid injection port 8, the damping liquid 5 generally does not exceed 2/3 of the volume, and the viscosity is 30-100000 mm ² And(s) in the presence of a catalyst. The pendulum bob comprises a hammer barrel 6 and a hammer cover 7, wherein a counterweight ball 9 is arranged in the hammer barrel 6, and the counterweight ball 9 can be iron beads, lead beads or nonmetal particles. The hammer barrel 6 is positioned in the damping liquid 5, and the hammer cover 7 is arranged at the barrel opening of the hammer barrel 6 and used for sealing the inner cavity of the hammer barrel 6. A central column 10 is arranged in the hammer barrel 6, the upper end of the central column 10 is connected with the adjusting component, and the lower end of the central column extends out of the hammer barrel 6 to be connected with the three springs 4.

In this embodiment, the adjusting assembly includes a screw 11, a nut 12, a spherical nut 13 and a lock nut 14, the housing is further provided with an adjustable cap 15, the adjustable cap 15 is disposed at the upper end of the upper casing 1, the adjustable cap 15 is screwed with the upper casing 1, an inner cavity of the adjustable cap 15 is provided with a support plate 16, and the support plate 16 is provided with a through hole. One end of the screw rod 11 is connected with the upper end of the central column 10 and locked by a nut 12, and the other end of the screw rod passes through a through hole of a support plate 16 and is sequentially connected with a spherical nut 13 and a locking nut 14. The screw 11 and the pendulum bob form a simple pendulum, the supporting plate 16 is a rotating support of the simple pendulum, and the simple pendulum can swing relative to the supporting plate 16 by taking the through hole of the supporting plate 16 as a circle center through the spherical nut 13. The distance between the adjusting nut and the lock nut 14 is adjusted to adjust the length of the simple pendulum.

The utility model discloses a simple pendulum formula frequency modulation mass damper, overall structure is small and exquisite, but symmetrical arrangement a plurality of around the tower body. The working principle is as follows: the length of the simple pendulum, the mass of the pendulum bob and the damping liquid 5 and the rigidity of the spring 4 are adjusted to enable the natural vibration frequency to be as close as possible to the basic frequency or the excitation frequency of the tower body, when external force (wind power) acts on the tower body to generate vibration, the simple pendulum generates movement which is always opposite to that of the tower body, the vibration reaction of the structure is attenuated and controlled, and the damping ratio of the tower body is improved.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical essence of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a simple pendulum formula frequency modulation mass damper which characterized in that, includes shell, spring damping subassembly, damping subassembly and adjusting part set up in the shell, damping subassembly includes damping liquid and pendulum, the pendulum is located damping liquid, adjusting part and pendulum constitute the simple pendulum, the shell is equipped with the support piece of simple pendulum, the relative support piece swing of simple pendulum.

2. The mono-pendulum fm mass damper of claim 1, wherein the housing comprises an upper shell and a lower shell, the upper and lower shells being in communication, the lower shell having two flanges on one side for connection to a tower structure.

3. The simple pendulum tuned mass damper of claim 2, wherein said spring damper assembly comprises at least three springs, said springs having one end connected to said lower housing and another end connected to said damper assembly.

4. The simple pendulum frequency-modulated mass damper of claim 1, wherein the damping fluid does not generally exceed 2/3 of the volume and has a viscosity of 30-100000 mm ² /s。

5. A simple pendulum fm mass damper as claimed in claim 1 wherein the pendulum bob is hollow with a counterweight ball inside, the counterweight ball can be iron, lead or non-metallic particles.

6. The single pendulum type frequency modulation mass damper according to claim 2, wherein the adjusting assembly comprises a screw, a nut, a spherical nut and a lock nut, the housing further comprises an adjustable cap, the adjustable cap is disposed at an upper end of the upper housing, a supporting plate is disposed in an inner cavity of the adjustable cap, one end of the screw is connected to the pendulum, and the other end of the screw passes through the supporting plate to be sequentially connected to the spherical nut and the lock nut.

7. The pendulum FM mass damper of claim 6, wherein the length of the pendulum is adjusted by adjusting the distance between said nut and said locknut.