Disc-shaped nonlinear low-frequency vibration isolator based on positive and negative stiffness parallel connection principle

A positive and negative stiffness, non-linear technology, applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., can solve the problems that cannot be adjusted in a large range, and achieve the expansion of the quality range of vibration isolation and good low-frequency vibration isolation Effect, Strong Adaptive Effect

Inactive Publication Date: 2017-06-20
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

By designing the adjustment device, the mass application range of the vibration isolation system can be increased, but

Method used

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  • Disc-shaped nonlinear low-frequency vibration isolator based on positive and negative stiffness parallel connection principle
  • Disc-shaped nonlinear low-frequency vibration isolator based on positive and negative stiffness parallel connection principle
  • Disc-shaped nonlinear low-frequency vibration isolator based on positive and negative stiffness parallel connection principle

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Embodiment Construction

[0024] Such as Figure 4 As shown, the present invention comprises power input part 1, extension spring system 2, stage clip system 3 and shell 4, and during work, the shell part of this device is connected with vibration input source, and the guide rod 11 end flanges of power input part 1 Fixed connection with the vibration-isolated object.

[0025] Such as figure 1 As shown, the power input part 1 is composed of a guide rod 11, a casing sleeve 12, a guide rod sleeve 13, a positioning bolt 14, a pin shaft 15, a vertical connecting rod 16, a horizontal connecting rod 17 and a spline shaft 18, wherein , the guide rod 11 is a connecting piece with the vibration-isolated object, the guide rod 11 and the vibration-isolated object are connected through the flange at the end of the guide rod 11, the guide rod sleeve 13 is set on the guide rod 11, and the shell sleeve 12 sets On the guide rod sleeve 13, the guide rod sleeve 13 is interference fit with the guide rod 11, and the guid...

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Abstract

The invention discloses a disc-shaped nonlinear low-frequency vibration isolator based on the positive and negative stiffness parallel connection principle. The disc-shaped nonlinear low-frequency vibration isolator is composed of a power input part, a tension spring system, a pressure spring system and a shell. Positive stiffness is achieved through the tension spring, negative stiffness is achieved through the pressure spring system, and the tension spring and the pressure spring system are combined, so that a system static force-displacement curve represents a quasi zero stiffness feature. The excellent vibration isolation performance of the nonlinear vibration isolator is continued; and meanwhile, through adjustment of a threaded structure and increasing or decreasing of the number of tension sets, the applicable vibration isolation mass range of the vibration isolator can be broadened greatly, and the defect that the vibration isolation mass range of an ordinary nonlinear vibration isolator is small is overcome.

Description

technical field [0001] The invention belongs to the field of low-frequency vibration isolation, and in particular relates to a disk-shaped nonlinear low-frequency vibration isolator based on the principle of parallel connection of positive and negative stiffnesses and having a large adjustment range of vibration isolation quality. Background technique [0002] Low-frequency vibration in engineering affects the stability and precision of equipment, reduces the strength of parts and even causes fatigue damage, causing unnecessary losses, and also brings noise pollution. Low-frequency vibration in some fields can also endanger the physical and mental health of workers . To address this limitation, effective low-frequency vibration isolation design is a research focus in various engineering fields. [0003] According to the traditional passive vibration isolation theory, the linear vibration isolation system has a better isolation effect on medium and high frequency vibrations,...

Claims

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Application Information

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IPC IPC(8): F16F7/104
CPCF16F7/104
Inventor 闫振华曹亚宁董春生刘文辉张富尧顾哲豪张小江
Owner JILIN UNIV
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