Active Electromagnetic Negative Stiffness Vibration Isolation Device
A technology with negative stiffness and dynamic magnetism, applied in the direction of shock absorber, non-rotational vibration suppression, spring/shock absorber functional characteristics, etc., can solve the problems of high energy consumption and complex structure, and achieve low energy consumption and simple structure of the system Compact, simple structure effect
Active Publication Date: 2022-03-29
HARBIN INST OF TECH
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Problems solved by technology
[0007] The purpose of the present invention is to limit the vibration amplitude of the vibration isolation load and the maximum deformation of the positive stiffness vibration isolator for the existing electromagnetic negative stiffness vibration isolation device, and it is not suitable for large air springs with large floating height and vibration displacement characteristics. In the field of low-frequency vibration isolation of vibration isolators, and the problems of complex structure and high energy consumption, an active electromagnetic negative stiffness micro-vibration isolation device is proposed
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[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0021] An active electromagnetic negative stiffness isolation microvibration device, comprising a fixed magnetic ring fixture 1, a fixed magnetic ring 2, a moving magnetic ring mounting part 3, a moving magnetic ring 4, a coil skeleton 5, a coil 6 and a vibration isolation load 7, the The fixed magnetic ring fixing part 1 is a T-shaped cylinder, the fixed magnetic ring 2 and the moving magnetic ring 4 are annular permanent magnets magnetized in the same direction along the axial direction, the coil bobbin 5 and the moving magnetic ring mounting part 3 are annular sleeves, and the coil bobbin 5 The upper and lower ends of the outer wall are provided with annular bosses; the fixed magnetic ring fixing part 1, the fixed magnetic ring 2, the moving magnetic ring mounting part 3, the moving magnetic ring 4, the coil skeleton 5 and the coil 6 are coa...
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The active electromagnetic negative stiffness microvibration isolation device belongs to the field of precision vibration isolation technology, and is composed of a coaxial nested double magnetic ring structure and a parallel connection of an energized coil. The coaxial nested double magnetic ring structure utilizes the high-amplitude positive stiffness characteristics generated in the radial direction to realize the magnetic guidance of axial movement, and realizes the negative stiffness characteristics of non-adjustable stiffness in the axial direction, and the energized coil generates precise and controllable excitation flux Adjustment for negative stiffness values. The magnetic ring gap of the present invention is perpendicular to the negative stiffness direction, which does not limit the vibration amplitude of the vibration isolation load and the maximum deformation of the positive stiffness vibration isolator; no additional guiding mechanism is required, and the structure is simple and compact; only a small current is required in the coil The bias magnetic field is regulated without continuous high energy input, and the system consumes low power.
Description
technical field [0001] The invention belongs to the technical field of precision vibration isolation, in particular to an active electromagnetic negative stiffness micro-vibration isolation device. Background technique [0002] Low-frequency micro-amplitude vibration interference in the environment has become one of the key issues that limit the accuracy of precision instruments and equipment, and the accuracy of testing and experiments. Equipping precision instruments and equipment with low-frequency vibration isolators has gradually become the main technology for suppressing environmental micro-vibrations in the field of ultra-precision engineering. means. Active electromagnetic negative stiffness microvibration isolation devices are widely used in parallel with positive stiffness isolators to build stiffness due to their characteristics of no mechanical friction, compact structure, easy integration with active control systems, and the ability to dynamically adapt to chang...
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IPC IPC(8): F16F15/03
CPCF16F15/03F16F2222/06F16F2228/063
Inventor 崔俊宁赵亚敏邹丽敏边星元程钟义黄莹莹
Owner HARBIN INST OF TECH