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Bilinear horizontal sliding vibration reduction system for azimuth axis structure of large astronomical telescope

A technology for astronomical telescopes and vibration reduction systems, applied in the direction of telescopes, optics, instruments, etc., can solve problems such as damage, and achieve the effect of avoiding pointing accuracy and high rigidity

Active Publication Date: 2020-06-05
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optics of the telescope (M1 primary mirror, M2 secondary mirror, and spectrometer) are very sensitive pieces of equipment that are likely to be damaged if subjected to significant accelerations

Method used

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  • Bilinear horizontal sliding vibration reduction system for azimuth axis structure of large astronomical telescope
  • Bilinear horizontal sliding vibration reduction system for azimuth axis structure of large astronomical telescope
  • Bilinear horizontal sliding vibration reduction system for azimuth axis structure of large astronomical telescope

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Embodiment 1

[0036] Embodiment 1, large-scale astronomical telescope azimuth axis horizontal slip vibration reduction and isolation system, refer to Figure 1-Figure 4 :

[0037] The isolation system is mounted on the azimuth axis spindle central axis 2 and connects the telescope structure to the base pier 3 . Figure 1 is the azimuth structure. The locking mechanism inside the isolator applies pre-tightening force through the spring, the locking mechanism such as image 3 shown. In the figure, the preload spring is 4, the damper is 5, the tension force is 6, and the compression force is 7. During observation, the telescope structure needs to be firmly fixed on the base and maintain high rigidity to avoid disturbances such as wind and brakes and high resonance frequency for better tracking control. In the event of an earthquake, if the seismic load exceeds a preset value, the prestressed spring starts to move and releases the structure so that the upper telescope structure can move hori...

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PUM

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Abstract

The invention discloses a bilinear horizontal sliding vibration reduction system for an azimuth axis structure of a large astronomical telescope. The large astronomical telescope structure is supported by an azimuth axis lateral bearing and an axial bearing. The features are that the seismic isolation system is arranged between a movable part of the pivot bearing and a lower plate of the azimuth angle bottom plate and is composed of four bilinear shock absorbers, and the shock absorbers connect four uniformly distributed points of the bearing with four points of the azimuth axis bottom plate which are 90 degrees away from the four uniformly distributed points of the bearing. Pretightening force is applied to the four bilinear shock absorbers. An axial hydrostatic bearing supporting the azimuth axis of the telescope structure uses sliding contact on the azimuth axis track. The system is used for protecting the main structure of the telescope from the influence of high-intensity earthquakes. According to the invention, effective isolation can be provided in a strong earthquake event, and under a normal observation condition, the telescope has very high rigidity, and the pointing accuracy of the telescope can be prevented from being interfered.

Description

technical field [0001] The invention relates to a vibration damping device, in particular to a bilinear horizontal sliding vibration damping device with an azimuth axis structure of a large astronomical telescope. [0002] The invention is the research achievement of the National Natural Science Foundation (A11) "Research on the Key Technology of the Active Surface of Large Radio Telescope". Background technique [0003] In recent years, the giant ground-based astronomical optical telescopes with a primary mirror diameter of 20-50m under development in the world mainly include: the American Thirty Meter Telescope (TMT), the 24.5m Large Magellan Telescope (GMT) and the European Southern Astronomy 39m Extremely Large Telescope ( E-ELT). [0004] Most of the existing astronomical observatories in the world with superior observation conditions are located in earthquake-prone areas, for example, Hawaii in North America and Chile in South America, where many large astronomical te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/16
CPCG02B23/16
Inventor 胡守伟
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE