Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Novel electromagnetic negative stiffness vibration isolator with high radial stability

A technology of stability and negative stiffness, applied in the functional characteristics of spring/shock absorber, magnetic spring, spring/shock absorber, etc., can solve the problems of negative stiffness limitation, negative stiffness cannot be adjusted, vibration under variable working conditions, etc.

Active Publication Date: 2020-10-27
NUCLEAR POWER INSTITUTE OF CHINA
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional quasi-zero-stiffness vibration isolators mostly use a spring combination structure or a permanent magnet combination spring to achieve the negative stiffness effect. However, the non-adjustability of the achieved negative stiffness limits its application to a certain extent.
[0003] In order to solve the problem that the negative stiffness of the traditional quasi-zero stiffness vibration isolator cannot be adjusted, the invention authorized by the announcement number CN105485230B proposes an electromagnetic semi-active vibration isolator that uses an asymmetrical magnetic tooth structure to achieve quasi-zero stiffness characteristics. Its positive stiffness Provided by an array of helical springs, the negative stiffness is realized through an asymmetrically dislocated magnetic tooth structure, and the magnitude of the negative stiffness can be adjusted by changing the current, which can better solve the vibration problem of variable working conditions
[0004] The core technology of the negative stiffness achieved by this invention is to use "electromagnetic attraction" to construct the axially unstable force between the mover and the stator. However, there is a radial electromagnetic pull between the mover and the stator. Due to the processing and installation accuracy In the case of high current, the system is very prone to radial bias, and the radial stability is poor, which leads to contact friction or even collision between the mover and stator, which greatly reduces the vibration isolation performance of the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel electromagnetic negative stiffness vibration isolator with high radial stability
  • Novel electromagnetic negative stiffness vibration isolator with high radial stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 2 As shown, a new type of electromagnetic negative stiffness vibration isolator with high radial stability includes a stator housing 2, a mover arranged in the inner cavity of the stator housing 2 and movable along the longitudinal axis of the stator housing 2 6. Assembled under the mover 6, the first positive stiffness component that acts as a positive stiffness to the mover 6,

[0053] It also includes a coil 3 assembled on the outer wall of the mover 6 and wound around the longitudinal axis of the mover 6, and the mover 6 is made of high magnetic permeability material;

[0054] It also includes a permanent magnet 7 arranged on the first layer and a permanent magnet 7 arranged on the second layer along the longitudinal axis of the stator housing 2, which are assembled on the inner side wall of the stator housing 2, and the permanent magnet 7 on the first layer is connected to the second layer. The permanent magnetic field polarity end face of the perm...

Embodiment 2

[0061] Such as figure 2 Shown, on the basis of above-mentioned embodiment, preferably:

[0062] The mover 6 includes a magnetically permeable cylinder 61, a magnetically permeable ring protrusion 62 arranged on the first layer along the longitudinal axis, and a magnetically permeable ring protrusion 62 arranged on the second layer, wherein the magnetically permeable ring protrusion 62 of the first layer is arranged on the The magnetically permeable ring convex 62 of the second layer is integrally connected with the magnetically permeable cylinder 61,

[0063] Wherein the outer peripheral surface of the first layer of the magnetic permeable ring protrusion 62 is the first polarity end face of the mover 6, the outer peripheral surface of the second layer of the magnetic permeable ring protrusion 62 is the second polarity end face of the mover 6, the first polarity The polarity end face is directly opposite to the 7 polarity end faces of the permanent magnets of the first layer...

Embodiment 3

[0067] Such as figure 2 Shown, on the basis of above-mentioned embodiment, preferably:

[0068] Also includes a base 4, the lower bottom surface of the stator housing 2 is installed on the base 4;

[0069] The first positive stiffness component is a helical spring, and the helical spring is installed between the lower bottom surface of the mover 6 and the base 4 .

[0070] On the basis of above-mentioned technical scheme, preferred technical scheme is:

[0071] It also includes a support plate 1, the bottom surface of the support plate 1 has an extension,

[0072] Also includes a linear bearing 5, the linear bearing 5 is assembled on the upper port of the stator housing 2,

[0073] The extension part passes through the linear bearing 5 and is directly or indirectly connected to the upper end of the mover 6 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a novel electromagnetic negative stiffness vibration isolator with high radial stability. The novel electromagnetic negative stiffness vibration isolator with high radial stability comprises a stator housing (2), a rotor (6), and further comprises a coil (3) which is wound along the longitudinal axis of the stator (6), a permanent magnet (7) which is arranged at a first layer along the longitudinal axis of the stator housing (2), and a permanent magnet (7) which is arranged at the second layer, wherein polar end surfaces of the permanent magnetic fields of the permanentmagnet (7) at the first layer and the permanent magnet (7) at the second layer face towards the radial direction; polarity of the permanent magnet (7) at the first layer is reverse to that of the permanent magnet (7) at the second layer; polarity of the upper end of the rotor (6) is same with that of the adjacent polar end surface of the permanent magnet (7) at the first layer, and the upper endand the permanent magnet are in repellent electrifying directions; and the polarity of the upper end of the rotor (6) is the same with that of the adjacent polar end surface of the permanent magnet (7) at the second layer, and the lower end and the permanent magnet are in repellent electrifying directions. Repellent force between the permanent magnets and the rotor guarantees negative stiffness, and further achieves inhibition effect on offset amount of the rotor.

Description

technical field [0001] The invention relates to the field of vibration isolator design, and relates to a novel electromagnetic negative stiffness vibration isolator with high radial stability. Background technique [0002] The quasi-zero stiffness vibration isolation technology can provide a lower dynamic stiffness on the premise of ensuring a higher static stiffness, thereby not only ensuring the static support stability of the system but also achieving a lower first-order natural frequency, and the low-frequency vibration isolation effect of the system better. Considering the superior performance of the quasi-zero stiffness vibration isolator, it has received more and more research and exploration in recent years. Traditional quasi-zero-stiffness vibration isolators mostly use a spring combination structure or a permanent magnet combination spring to achieve the negative stiffness effect, but the non-adjustability of the achieved negative stiffness limits its application ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16F6/00
CPCF16F6/00F16F2228/063F16F2228/066
Inventor 韩超李鑫刘桂祥张世伟沈双全林松卢军张鲲孙磊李朋洲
Owner NUCLEAR POWER INSTITUTE OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com