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Resonance-peak-free shock absorber with built-in negative-stiffness dynamic vibration absorber

A technology of dynamic shock absorber and negative stiffness, which is applied in the direction of spring/shock absorber functional characteristics, spring/shock absorber, vibration suppression adjustment, etc. Difficult, large negative stiffness and other problems, to achieve the effect of compact structure, small mass and simple principle

Inactive Publication Date: 2018-10-23
汪玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For shock absorbers with large loads, since large loads mean large stiffness when the natural frequency is constant, in order to achieve the purpose of high static and low dynamics, the required negative stiffness is also large, and large negative stiffness can be achieved in a limited space It is very difficult to achieve high static and low dynamics for large-load shock absorbers; since the quality of the mass of the dynamic It is also very difficult to match the dynamic vibration absorber for the large load vibration isolator

Method used

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  • Resonance-peak-free shock absorber with built-in negative-stiffness dynamic vibration absorber
  • Resonance-peak-free shock absorber with built-in negative-stiffness dynamic vibration absorber
  • Resonance-peak-free shock absorber with built-in negative-stiffness dynamic vibration absorber

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the non-resonance peak shock absorber of the present invention embedded with a single set of disc spring negative stiffness dynamic shock absorbers is composed of the following parts: an upper connector 1, an elastic element 2, a lower connector 3, a dynamic shock absorber and a single set disc spring 6.

[0029] The upper connecting piece 1 is located at the top of the whole device and has an axisymmetric structure, the inner concave surface of the side is arc-shaped, and the bottom surface is a plane;

[0030] The elastic element 2 is located under the upper connecting piece 1 and has an axisymmetric structure. The upper surface of the elastic element 2 is in close contact with the concave arc-shaped side surface of the upper connecting piece 1, and the lower surface is inclined upward; The elastic element 2 provides vibration isolation;

[0031] The lower connecting part 3 is located under the elastic element 2, and has a symmetrical stru...

Embodiment 2

[0041] Embodiment 2 of the present invention is as figure 2 shown. The single group of disc springs in Embodiment 1 is modified into multiple groups of disc springs arranged symmetrically around the circumference, and the rest of the components are the same as those in Embodiment 1. The use of multiple sets of disc springs in this embodiment can ensure that the mass block vibrates along the vertical direction, and at the same time can enhance the stability of the support, and the synergistic effect of multiple sets of disc springs can obtain more stable negative stiffness characteristics.

[0042] Such as image 3 As shown, the upper connecting piece 1 and the lower connecting piece 3 are equivalent to the approximately rigid black shaded part, and the elastic element 2 is equivalent to the spring k s , bellows 4 and mass block 5 are equivalent to spring k e and damping c, disc spring 6 is equivalent to negative stiffness k n (k n 2 xn x<0, so the inertial force of the m...

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Abstract

The invention discloses a resonance-peak-free shock absorber with a built-in negative-stiffness dynamic vibration absorber. The shock absorber comprises an upper connecting piece, an elastic element and a lower connecting piece, and a cavity is formed among the upper connecting piece, the elastic element and the lower connecting piece. The shock absorber further comprises the dynamic vibration absorber and a negative-stiffness component which are located in the cavity. The dynamic vibration absorber comprises an elastic element and a mass block which are connected in series from top to bottom;a damping hole is formed in the elastic element, and the negative-stiffness component is arranged at the lower end of the mass block. According to the shock absorber, vibration isolation of a wide frequency band can be achieved under a large-load bearing condition, and meanwhile the resonance peak is avoided at a small mass cost. The shock absorber has the advantages of being compact in structureand convenient to install.

Description

technical field [0001] The invention relates to the technical field of vibration isolation of precision instrument processing equipment and marine mechanical equipment, in particular to a resonance peak-free shock absorber embedded with a negative stiffness dynamic shock absorber. Background technique [0002] In production occasions such as precision instrument processing equipment and marine mechanical equipment, in order to reduce the transmission of foundation vibration to the processing platform and reduce the transmission of equipment excitation force to the hull base structure, vibration isolation technology is usually used for negative vibration isolation and positive isolation. vibration. In the current vibration isolation technology, in order to meet the stability requirements, the vibration isolation frequency of the vibration isolation system usually cannot be designed to be low, resulting in the frequency components of some excitations being located before the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/023F16F15/04
CPCF16F15/022F16F15/023F16F15/04F16F2228/063
Inventor 汪玉
Owner 汪玉
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