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Frictional damping dynamic vibration absorber

A dynamic vibration absorber and friction damping technology, applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems of small installation space for vibration reduction efficiency, achieve optimal friction damping energy consumption effect, and improve energy saving. Vibration efficiency, reducing the effect of mass ratio index requirements

Active Publication Date: 2017-11-03
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies in the vibration reduction of printed circuit boards in the current electronic equipment, and provides a frictional damping dynamic vibration absorber, which can meet the multiple design requirements of electronic equipment such as high vibration reduction efficiency, small installation space, and no influence on heat dissipation and grounding.

Method used

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  • Frictional damping dynamic vibration absorber
  • Frictional damping dynamic vibration absorber
  • Frictional damping dynamic vibration absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The elastic sleeve 4 is an elastic supporting structure, which is completely fixedly connected with the rigid inverted T-shaped base 5 and the spherical housing 3 . The damping ball 2 filled in the damping cavity 10) of the spherical housing 3 is a solid sphere. The top of the spherical housing 3 is equipped with an adjustment cap 1 for adjusting the size of the damping cavity 10). When the adjustment cap 1 is screwed in downwards, the movement range of the solid damping ball 2 in the vibration damping cavity 10) can be compressed. When the adjustment cap 1 When screwing upward, the movement range of the solid damping ball 2 in the damping cavity 10) can be expanded. When in use, first use modal test or modal simulation to determine the natural frequency and maximum mode shape position of the printed circuit board, according to the optimal tuning ratio formula in the dynamic vibration absorption theory The mass ratio of the vibration absorber of the present invention ...

Embodiment 2

[0026] refer to image 3. The difference between this embodiment and the above-mentioned embodiment 1 is that the elastic sleeve 4 is removed, the spherical housing 3 is changed from a rigid structure to an elastic damping structure that removes the adjustment cap 1, and the inverted T-shaped base 5 is changed into an internal threaded pipe 6 , The spherical shell 3 is directly fixedly connected with the internally threaded pipe 6, and the other composition, installation and connection relations are the same as those in Embodiment 1.

Embodiment 3

[0028] refer to Figure 4 . The difference between this embodiment and the above-mentioned embodiment 1 is that the elastic sleeve 4 is replaced by a film spring 7 fixed on the open end of the spherical housing 3, the inverted T-shaped base 5 is changed into a T-shaped screw 9, and the T-shaped screw 9 The shaft shoulders are fixedly connected by nuts 8 through membrane springs 7, and the other composition structures are the same as in embodiment 1.

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Abstract

The invention discloses a frictional damping dynamic vibration absorber. The frictional damping dynamic vibration absorber comprises an inverted-T-shaped base (5) connected with the opening end of a spherical shell (3). An elastic sleeve (4) is fixedly connected between the inverted-T-shaped base and the opening end of the spherical shell. A vibration damping cavity (10) defined by the spherical shell (3) is filled with a plurality of vibration damping balls (2). An adjusting nut (1), which is screwed out upwards or screwed in downwards to change the size of the vibration damping cavity, is arranged on the upper part, corresponding to the opening of the spherical shell, of the spherical shell and is used for adjusting the movement range of the vibration damping balls in the vibration damping cavity. According to the inherent frequency of a printed-circuit board (PCB), the number of the vibration damping balls filling the vibration damping cavity is calculated through a dynamic vibration absorption theoretical formula. By adopting the frictional damping dynamic vibration absorber, the problems that an existing vibration absorber is provided with an electromagnetic source and a power source which are likely to generate radiated interference on electronic equipment, and cannot be used for damping vibration of a small thin-board structure of the PCB due to the large size and weight in the prior art are solved. The frictional damping dynamic vibration absorber has the characteristics of good vibration damping effect, small size and weight and the like and meets the requirements for vibration damping of PCBs under the condition of the high vibration magnitude.

Description

technical field [0001] The invention relates to a dynamic tuning vibration absorber with frictional damping characteristics, which is mainly used for vibration reduction of printed circuit board PCB of electronic equipment in a small installation space under strong vibration environment conditions, and can also be used for vibration reduction of small and medium-sized thin plate structures in other equipment. vibration noise reduction. Background technique [0002] Various types of equipment installed on moving platforms or facilities are always in a vibration environment. In most cases, vibration is harmful, it will cause dynamic deformation and dynamic stress, and these deformations and stresses will cause equipment structural fatigue and internal components. Damage and shorten the service life of parts or components, so vibration control of equipment and its internal components is a necessary work. According to whether external energy is needed, vibration control can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F7/104
CPCF16F7/104
Inventor 何敏
Owner 10TH RES INST OF CETC
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