Low-frequency quasi-zero stiffness vibration isolator integrated with double geometric nonlinear structures

A geometrically nonlinear, quasi-zero stiffness technology, used in low internal friction springs, springs/shock absorbers, vibration suppression adjustment, etc. Quasi-zero stiffness interval, the effect of increasing the working range

Pending Publication Date: 2022-04-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing nonlinear quasi-zero-stiffness vibration isolation system cannot realize the vibration isolation effect in a lower frequency, a larger working range and a wider frequen

Method used

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  • Low-frequency quasi-zero stiffness vibration isolator integrated with double geometric nonlinear structures
  • Low-frequency quasi-zero stiffness vibration isolator integrated with double geometric nonlinear structures
  • Low-frequency quasi-zero stiffness vibration isolator integrated with double geometric nonlinear structures

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specific Embodiment approach 1

[0034] Specific implementation mode one: refer to Figure 1 to Figure 7 To illustrate this embodiment, this embodiment provides a low-frequency quasi-zero-stiffness vibration isolator integrated with dual geometric nonlinear structures. The vibration isolator includes a bearing platform 8, a bottom plate 9, a main bearing assembly and an auxiliary bearing assembly;

[0035] The bearing platform 8 is arranged directly above the base plate 9, and the axis of the bearing platform 8 is arranged in line with the axis of the base plate 9. The main bearing assembly is arranged between the bearing platform 8 and the base plate 9, and the top of the main bearing assembly is in line with the bearing. The bottom of the platform 8 is fixedly connected, the bottom of the main bearing assembly is fixedly connected to the top of the bearing platform 8, the auxiliary bearing assembly is sleeved on the outside of the main bearing assembly, and the top of the auxiliary bearing assembly is fixedl...

specific Embodiment approach 2

[0037] Specific implementation mode two: refer to Figure 1 to Figure 7 Describe this embodiment. This embodiment is to further limit the carrying platform 8 and the bottom plate 9 described in the first embodiment. In this embodiment, the carrying platform 8 and the bottom plate 9 are positive N sides with cutouts at the corners shaped plate, N is a positive integer, and the side length of the bottom plate 9 is greater than the side length of the carrying platform 8. Other compositions and connection methods are the same as those in Embodiment 1.

[0038]In this embodiment, the carrying platform 8 and the bottom plate 9 are preferably equilateral triangles. Due to the stability of their own structures, the equilateral triangles make the vibration isolator more stable during the working process, and keep only moving in the vertical direction, and no additional vertical structure is required. The directional limiter or guide rod removes the complicated auxiliary design and sim...

specific Embodiment approach 3

[0039] Specific implementation mode three: refer to Figure 1 to Figure 7 Describe this embodiment, this embodiment is to further limit the main bearing assembly described in the first specific embodiment, the main bearing assembly in this embodiment includes N X-shaped vibration isolation structures, N is a positive integer, each X The X-type vibration isolation structure is set corresponding to a cutout in the bearing platform 8, the top of each X-type vibration isolation structure is fixedly connected to the bottom of the bearing platform 8, and the bottom end of each X-type vibration isolation structure is fixed to the top of the bottom plate 9 connect. Other compositions and connection methods are the same as those in Embodiment 1.

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Abstract

The invention discloses a low-frequency quasi-zero-stiffness vibration isolator integrated with double geometric nonlinear structures, belongs to the field of low-frequency quasi-zero-stiffness vibration isolation devices, and aims to solve the problem that an existing nonlinear quasi-zero-stiffness vibration isolation system cannot achieve the vibration isolation effect at a lower frequency, a larger working interval and a wider frequency range. According to the low-frequency quasi-zero stiffness vibration isolator integrated with the double geometric nonlinear structures, an X-shaped structure serves as a supporting body, and it is guaranteed that the vibration isolator has the better bearing capacity and stability in the working process; a horizontal spring (or two inclined springs) structure is introduced to provide positive stiffness to eliminate negative stiffness existing in the structure, it is guaranteed that the structure cannot be unstable and damaged in the working process, meanwhile, the quasi-zero stiffness interval of the structure is widened, the vibration isolation effect can be achieved in lower frequency, a larger working interval and a wider frequency range, and the service life of the vibration isolator is prolonged. And the structural stability is ensured while low-frequency vibration isolation is performed.

Description

technical field [0001] The invention belongs to the field of low-frequency quasi-zero-stiffness vibration isolators, in particular to a low-frequency quasi-zero-stiffness vibration isolator integrated with double geometric nonlinear structures. Background technique [0002] Vibration problems are ubiquitous and need to be solved urgently. Improving vibration isolation performance will greatly improve work performance and equipment service life. Passive vibration isolation systems are widely used due to their low cost, simple structure, and easy maintenance. However, traditional vibration isolators must sacrifice their load-carrying capacity to reduce the vibration isolation frequency, which requires more advanced vibration isolation methods. The nonlinear quasi-zero stiffness vibration isolator has high static and low dynamic nonlinear stiffness characteristics due to the overall stiffness of the structure, and the large stiffness range can provide excellent load-bearing cap...

Claims

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Application Information

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IPC IPC(8): F16F15/067F16F3/04F16F1/12
Inventor 种晓强吴志静李凤明
Owner HARBIN ENG UNIV
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