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A Vibration Isolator with Negative Stiffness Balance Position Adjustment Function

A technology of balanced position and negative stiffness, applied in the direction of spring/shock absorber, vibration suppression adjustment, non-rotation vibration suppression, etc. Effect

Active Publication Date: 2021-08-17
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the load-bearing mass of the vibration isolator is not equal to the rated mass, the roller-cam structure in the negative stiffness unit will deviate from the equilibrium position, which seriously affects the use effect of the vibration isolator

Method used

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  • A Vibration Isolator with Negative Stiffness Balance Position Adjustment Function
  • A Vibration Isolator with Negative Stiffness Balance Position Adjustment Function
  • A Vibration Isolator with Negative Stiffness Balance Position Adjustment Function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The adjustment mechanism includes a T-shaped block (6) with a sloped bottom surface, a scale block (7) and an adjustment bolt (8). The adjustment bolt (8) passes through the scale block (7) and is connected with the T-shaped block (6). An adjusting nut (8-1) is arranged on the bolt, and the adjusting nut (8-1) is threadedly matched with the adjusting bolt (8), and the axial relative position between the adjusting nut (8-1) and the scale block (7) remains unchanged; (that is, the adjustment nut (8-1) can only rotate, but the (axial) displacement between the scale block (7) remains relatively unchanged, that is, the adjustment nut (8-1) does not move axially, so that the rotation Control the axial movement of the adjusting bolt to control the movement of the T-shaped block (6), while the adjustment nut (8-1) can only rotate and the axial displacement remains unchanged. Set a ring of bosses on the outer edge of the four sides, and then use the 7-shaped key to lock it, as s...

Embodiment 2

[0141] like Figure 29-33 :

[0142] The adjusting mechanism comprises a vertical adjusting nut (17) connected to the bottom of the upper top plate (1) (with scale) and an adjusting rod (18) connected to the top of the upper bearing block (9), the upper end of the adjusting rod (18) Cooperate with the vertical adjustment nut (17), and control the lifting of the adjustment rod (18) by the screwing of the vertical adjustment nut (17). (Adjusting nut (17) can rotate, but axially fixed, prior art, its principle can adopt the principle of aforementioned adjusting nut (8-1))

[0143] When the track (12) was an oblique bar shape, a "eight" shape was formed between the two tracks (12) (as Figure 29 , 30 , Shown in 32,33, is exactly that the upper end is inwardly inclined).

[0144] In the structures of the above two embodiments:

[0145] One of the upper end points (C) of the scissor support rod (5) is movably connected with the connecting rod shaft (19) (passing through the sli...

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Abstract

A vibration isolator with a negative stiffness balance position adjustment function is characterized in that: the unit includes three parts: an external frame, a support mechanism and a negative stiffness unit; the invention proposes a vibration isolator with a negative stiffness balance position adjustment Functional support unit structure and calculation method of its adjustment amount (the balance position adjustment mechanisms of parabolic and runway type vibration isolators are different, one is a horizontal knob nut, and the other is a vertical tightening nut.), the content of the invention can ensure the load When the rigidity vibration isolator bears any mass within the load range, the middle roller-cam structure in the negative stiffness unit can be adjusted back to the equilibrium position, which prevents the negative stiffness unit from interfering with the bearing capacity of the support unit, so that the vibration isolation effect reaches Optimum, it is beneficial to the stability of the system in the state of no external vibration.

Description

technical field [0001] A vibration isolator with negative stiffness balance position adjustment function. Background technique [0002] In recent years, with the rapid development of cutting-edge technologies such as high-speed machinery, precision optical instruments, and orbiting spacecraft, people have also put forward requirements for changes in the vibration environment during equipment operation. The traditional linear vibration isolator reaches the vibration isolation system at the external excitation frequency Only when the natural frequency is twice the natural frequency can effective vibration isolation be achieved. Reducing the natural frequency of the system can widen the vibration isolation frequency band, but it will also lead to increased static load deformation and damage the stability of the system; this contradiction makes the vibration isolation effect of the linear vibration isolation system unsatisfactory. By connecting negative stiffness units in par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/04G06F30/17
CPCF16F15/002F16F15/04
Inventor 董祉序孙兴伟刘伟军杨赫然徐芳素
Owner SHENYANG POLYTECHNIC UNIV
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