Three-degree-of-freedom low-frequency vibration isolator based on parallel connection of horizontal preloaded spring and magnetic spring
A technology of preloaded springs and magnetic springs, which is applied in the field of three-degree-of-freedom low-frequency vibration isolators, can solve the problems of low utilization rate of magnetic materials, and achieve the effects of improving design flexibility, high utilization rate of magnetic materials, and various magnetization directions
Active Publication Date: 2021-11-16
HARBIN INST OF TECH
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[0006] Aiming at the problem that the magnetic material utilization rate of the existing three-degree-of-freedom electromagnetic vibration isolator is low, and a motion guiding mechanism is required to realize the stiffness characteristics in a specific direction, the present invention provides a three-degree-of-freedom low-frequency isolator based on a parallel connection of a horizontal preloaded spring and a magnetic spring. The three-degree-of-freedom electromagnetic vibration isolator uses a magnetic spring and four horizontal preloaded springs uniformly distributed along the circumference in parallel to achieve a three-degree-of-freedom positive stiffness structure parallel vibration isolation effect, which can effectively improve the utilization of magnetic materials. And there is no need for a motion-guiding structure; in addition, the magnetization direction of the magnetic spring is diverse, and the structural design flexibility is high
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[0025] A three-degree-of-freedom low-frequency vibration isolator based on a parallel connection of a horizontal preloaded spring and a magnetic spring, including a connection structure, a fixed structure and a spring structure, the overall structure is axisymmetric, and the connection structure includes a moving magnet connector 2 and a load connector 6. The top of the load connector 6 is fixedly connected to the vibration isolation load; the fixed structure includes a fixed spring seat 3, an adjustable spring seat 5, a nut 7, a fixed frame 8 and a bottom plate 9, and the bottom of the fixed frame 8 is fixedly connected to the bottom plate 9 External threads are set on the adjustable spring seat 5, the spring structure includes a magnetic spring 1 and four horizontally placed pre-compression springs 4, the ratio of the pre-compression amount of the pre-compression spring 4 to the original length is less than 0.75, and the four pre-compression springs The springs 4 are arranged...
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The three-degree-of-freedom low-frequency vibration isolator based on the parallel connection of horizontal preloaded springs and magnetic springs belongs to the field of precision vibration isolation technology. Four horizontally placed preloaded springs are arranged in a circular array, and the inner and outer ends are respectively connected to the load connector and the fixed frame. Fixed connection, the magnetic spring is composed of an upper fixed magnet, a middle moving magnet and a lower fixed magnet arranged along the Z-axis and other gaps. The upper fixed magnet and the lower fixed magnet are fixedly connected to the fixed frame and the bottom plate respectively, and the middle moving magnet is connected to the load connector through a moving magnet. fixed connection. The invention has simple and flexible structural design, high utilization rate of magnetic materials, and realizes the low-frequency / ultra-low-frequency vibration isolation effect of precision instruments and equipment with three degrees of freedom.
Description
technical field [0001] The invention belongs to the technical field of precision vibration isolation, in particular to a three-degree-of-freedom low-frequency vibration isolator based on a parallel connection of a horizontal preload spring and a magnetic spring. Background technique [0002] In the process of installation, testing and experimentation of precision instruments and equipment, low-frequency micro-amplitude vibration interference in the environment has become one of the key issues affecting research results. Equipping precision instruments and equipment with low-frequency vibration isolators has gradually become a field of precision engineering to suppress environmental micro-vibration main technical means. Low-frequency vibration isolators mostly use positive and negative stiffness structures connected in parallel or in series to achieve low-frequency vibration isolation effects. At present, there are more studies on single-degree-of-freedom and six-degree-of-fr...
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IPC IPC(8): F16F13/00F16F3/04F16F6/00
CPCF16F3/04F16F6/005F16F13/00F16F2222/06F16F2224/025
Inventor 崔俊宁王立梁士通钟红军赵亚敏邹丽敏
Owner HARBIN INST OF TECH