Low-frequency large-stroke quasi-zero stiffness vibration isolation device

A quasi-zero stiffness and large stroke technology, applied in the field of low-frequency and large-stroke quasi-zero stiffness vibration isolation devices, it can solve the problem of small displacement stroke, the vibration isolation effect is sensitive to the external environment and the load, and cannot adapt to harsh and complex actual working conditions. and other problems, to achieve the effect of high bearing capacity, stable and effective low-frequency vibration

Inactive Publication Date: 2021-01-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the dynamic stiffness of the existing quasi-zero stiffness vibration isolator can keep the quasi-zero displacement stroke small, its vibration isolation effect is extremely sensiti

Method used

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  • Low-frequency large-stroke quasi-zero stiffness vibration isolation device
  • Low-frequency large-stroke quasi-zero stiffness vibration isolation device

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Experimental program
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specific Embodiment approach 1

[0026] Specific implementation mode one: refer to figure 1 To illustrate this embodiment, this embodiment provides a low-frequency large-stroke quasi-zero-stiffness vibration isolation device, the vibration isolation device includes an upper platform 1, a lower platform 8, a diamond-shaped spring structure and two adjustable limit support structures;

[0027] The upper platform 1 and the lower platform 8 are arranged parallel to each other up and down, the diamond spring structure is arranged between the upper platform 1 and the lower platform 8, and the top of the diamond spring structure is fixedly connected with the center point of the lower surface of the upper platform 1, and the diamond spring structure The bottom of the bottom is fixedly connected to the center point of the upper surface of the lower platform 8, and the two adjustable limit support structures are relatively arranged at both ends of the diamond spring structure, and the bottom of each adjustable limit sup...

specific Embodiment approach 2

[0029] Specific implementation mode two: refer to figure 1 Describe this embodiment, this embodiment is to further limit the upper platform 1 described in the first specific embodiment, in this embodiment, the structure of the upper platform 1 and the lower platform 8 are the same, both are rectangular platforms. Other compositions and connection methods are the same as those in Embodiment 1.

[0030] Such setting ensures that the vibration isolation device provided by the present invention has good supportability and is more stable in experimental work.

specific Embodiment approach 3

[0031] Specific implementation mode three: refer to figure 1 Describe this embodiment. This embodiment is to further limit the rhombic spring structure and the two adjustment limit support structures described in the second specific embodiment. In this embodiment, the rhombus spring structure and the two adjustment limit support structures Located on the center line of the lower platform 8 along the width direction. Other compositions and connection methods are the same as those in the second embodiment.

[0032] In this embodiment, the diamond-shaped spring structure and the two adjustable limit support structures are located on the same center line, which is beneficial to ensure the coordination of the vibration isolation device during work and avoid the platform from shifting after the weight is applied.

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Abstract

The invention discloses a low-frequency large-stroke quasi-zero stiffness vibration isolation device, belongs to the technical field of mechanical vibration and noise control, and aims at solving theproblems that the dynamic stiffness of an existing quasi-zero stiffness vibration isolator can keep a quasi-zero displacement stroke to be small, so that the vibration isolation effect of the existingquasi-zero stiffness vibration isolator is extremely sensitive to the external environment and borne loads, and the existing quasi-zero stiffness vibration isolator cannot adapt to severe and complexactual working conditions. An upper platform and a lower platform are oppositely arranged in parallel up and down, a rhombus spring structure is arranged between the upper platform and the lower platform, the top of the rhombus spring structure is fixedly connected with the center point of the lower surface of the upper platform, and the bottom of the rhombus spring structure is fixedly connectedwith the center point of the upper surface of the lower platform. The two adjusting limiting supporting structures are oppositely arranged at the two ends of the rhombic spring structure, the bottomof each adjusting limiting supporting structure is fixedly connected with the upper surface of the lower platform, and the top of each adjusting limiting supporting structure is fixedly connected withthe lower surface of the upper platform. The low-frequency large-stroke quasi-zero stiffness vibration isolation device is suitable for isolating low-frequency vibration generated by a vibration source within a large displacement range.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration and noise control, and in particular relates to a quasi-zero-stiffness vibration isolation device with low frequency and large stroke. Background technique [0002] Passive vibration isolation devices are widely used in engineering because of their simple structure, low cost and easy maintenance. If traditional linear passive vibration isolators want to maintain low-frequency vibration isolation, their bearing capacity will inevitably decrease, which has become an unavoidable contradiction for linear vibration isolators. Nonlinear vibration isolators are an effective means to solve this problem. The quasi-zero stiffness system with nonlinear characteristics has low dynamic stiffness and high static stiffness characteristics, and the dynamic stiffness at the static equilibrium position is zero or quasi-zero. It can meet the large load and low natural frequency requirements required by...

Claims

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Application Information

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IPC IPC(8): F16F15/06
CPCF16F15/06F16F2228/06
Inventor 温舒瑞吴志静李凤明
Owner HARBIN ENG UNIV
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