Disc spring quasi-zero stiffness vibration isolator
A disc spring, quasi-zero stiffness technology, used in the field of low-frequency or ultra-low-frequency vibration isolators, can solve the problems of short effective stroke, complex structure, small bearing capacity, etc., and achieve adjustable bearing capacity, small size, and large bearing capacity. Effect
Active Publication Date: 2016-01-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] In order to solve the shortcomings of the existing quasi-zero-stiffness vibration isolator with small load capacity, complex
Method used
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Embodiment 2
[0026] The difference between Embodiment 2 and Embodiment 1 is that in order to provide greater negative stiffness in a limited space, the number of disc springs in the present invention can be multiple, such as image 3 The shown structure has three disc springs 2, and the plurality of disc springs 2 have the same orientation, and are stacked above the linear springs.
Embodiment 3
[0027] Embodiment 3 differs from Embodiments 1 and 2 in that, in order to increase the quasi-zero stiffness stroke, the disc springs 2 in the present invention can be used in series, as Figure 4 The structure shown has 3 belleville springs connected in series.
[0028] The disc spring 2 and the linear spring 5 of the vibration isolator in Embodiments 1-3 can be made of metal materials.
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The invention relates to the field of low-frequency or ultralow-frequency vibration isolators, in particular to a disc spring quasi-zero stiffness vibration isolator which is applied to ground vibration tests of spacecrafts. In order to overcome the defects that an existing quasi-zero stiffness vibration isolator is low in bearing capacity, complex in structure, and relatively short in effective stroke nearly zero-stiffness, the invention provides the quasi-zero stiffness vibration isolator. The quasi-zero stiffness vibration isolator comprises a disc spring, a pressing piece, a rigid casing, a linear spring and a linear spring length regulator, wherein the outer edge of the disc spring is connected with the rigid casing through the pressing piece; the center of the disc spring is fixedly connected with the top of the linear spring; the bottom of the linear spring is fixedly connected with the linear spring length regulator; and the linear spring length regulator is in threaded connection with the rigid casing. Compared with the existing low-frequency vibration isolator, the quasi-zero stiffness vibration isolator disclosed by the invention has the advantages of being small in added mass, high in bearing capacity, adjustable in bearing capacity, small in size, simple in structure, easy to maintain, high in reliability and the like.
Description
technical field [0001] The invention relates to the field of low-frequency or ultra-low-frequency vibration isolators, in particular to a spacecraft disc spring quasi-zero stiffness vibration isolator. Background technique [0002] The quasi-zero stiffness system can effectively realize the function of simulating the free boundary on orbit, and has important application value for spacecraft ground micro-vibration tests. Existing zero-stiffness vibration isolators include metal springs, air springs, and nonlinear suspension isolation springs, etc. These shock absorbers have a small load capacity in the low-frequency range, and large additional mass and damping, which cannot meet the needs of spacecraft ground test simulations. On-orbit free boundary requirements. [0003] After searching, the Chinese invention patent application with the application number 201310330360.3 disclosed an invention patent application named "Butterfly Rubber Quasi-Zero Stiffness Vibration Isolator...
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Inventor 周春燕申家康邢恩振
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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