Double-plate linear motion eddy current retarder

A technology of eddy current damper and linear motion, applied in the direction of spring/shock absorber, spring, magnetic spring, etc., can solve the problems of inconvenient maintenance, harsh working environment of spacecraft dampers, etc., and achieve high reliability and good electromagnetic compatibility characteristics, the effect of a large damping ratio

CN105805205AActive Publication Date: 2016-07-27BEIJING INST OF SPACECRAFT SYST ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-07-27

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Abstract

The invention discloses a double-plate linear motion eddy current retarder, and belongs to the technical field of spacecraft on-track micro-vibration control. The double-plate linear motion eddy current retarder comprises a center shaft, a spring, a mounting cylinder, an outer cylinder, a first metal plate, a permanent magnet, a connecting shaft, a second metal plate, a magnetic shielding end cover and a magnetic shielding cylinder; the bottom of the mounting cylinder is fixed at the end part of the outer cylinder; a linear bearing is mounted in the mounting cylinder; the center shaft is sleeved in the linear bearing; the spring coats the mounting cylinder; the magnetic shielding cylinder is fixed in the outer cylinder; the magnetic shielding end cover is mounted at an opening end of the magnetic shielding cylinder; the permanent magnet is mounted in a closed space consisting of the magnetic shielding cylinder and the magnetic shielding end cover; after the connecting shaft penetrates through the permanent magnet, the top end of the connecting shaft is connected with the tail end of the center shaft; the first metal plate and the second metal plate are respectively fixedly connected to the two ends of the connecting shaft, and are respectively positioned at two ends of the polarization direction of the permanent magnet. The double-plate linear motion eddy current retarder is applied to the spacecraft on-track micro-vibration control, uses an electromagnetic induction principle for generating damping, and can adapt to such complex environments as high space vacuum and thermal alternation.
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Description

technical field

[0001] The invention belongs to the technical field of on-orbit micro-vibration control of spacecraft, and in particular relates to a double-plate linear motion eddy current damper. Background technique

[0002] With the development of my country's aerospace technology, satellite micro-vibrations caused by moving parts on the star, such as motors, control moment gyroscopes, etc., will become an important factor affecting the actual performance of precision payloads, such as high-resolution ground remote sensing and observation cameras. image quality etc. In order to meet the requirements of precision payloads on satellite vibration environment, it is necessary to try to isolate and suppress the influence of micro-vibration. Passive vibration control technology, also known as damping control technology, is a technology that uses dampers or damping materials to consume structural vibration energy using the principle of damping energy dissipation. This method h...

Examples

Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] The invention provides a double-plate linear motion eddy current damper, see attached figure 1 , including: upper flange 1, upper buffer pad 2, upper end cover 3, center shaft 4, spring 5, linear bearing 6, bearing pad 7, installation cylinder 8, outer cylinder 9, lower buffer pad 10, first metal plate 11. Permanent magnet 12, connecting shaft 13, support tube 14, second metal plate 15, compression nut 16, lower end cover 17, magnetic shielding end cover 18, magnetic shielding cylinder 19, outer screw 20, inner screw 21 and central shaft Nut 22;

[0029] See attached figure 2 , the upper flange 1 is provided with an installation interface 23 for connecting with an external load device;

[0030] See attached image 3 , the bottom of the outer cylinder 9 is provided with a connection interface 24 for connecting with the installation base;

[003...