Flexible airborne system for supporting and precision driving for ultra-large telescope azimuth shafting
A technology for airborne systems and telescopes, which can be used in telescopes, propulsion systems, electromechanical devices, etc., and can solve problems such as the feasibility design of future giant telescopes.
Inactive Publication Date: 2018-09-28
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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Problems solved by technology
[0007] It is obvious that in the 8m to 10m class telescopes, the simple and straightforward technical extension solutions that have been applied more successfully cannot be applied to the feasibility design of future giant telescopes
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[0024] As shown in the figure, the support and drive system for the azimuthal axis of the VLT is based on the presence of fixed supports 1 in which a series of racks 7 are anchored to the mobile structure at various points, usually evenly distributed.
[0025] A guide rail 3 is provided in the center of the fixed structure 1, flanked by two side rails 2a, 2b, the stator of the linear motor 5 is mounted on its upper surface, and the rotor is located in the frame 7 and corresponds to the air gap, which remains constant and very low value. The fixed structure 1 has respective rails 2a, 2b parallel to the delimiting rail surface 3, on which rails 2b are supported a plurality of hydrostatic oil pads 4 mounted on the bearing surface of the frame 7, wherein the stator / Precise and very tight positioning of the rotor. Meanwhile, each support 7 supporting the mobile structure on the fixed structure 1 includes:
[0026] - The rotor of the linear motor 5 , arranged longitudinally corre...
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Provided is a flexible airborne system for supporting and precision driving for an ultra-large telescope azimuth shafting. An azimuth shafting positioned below a telescope supports the whole system and is connected with a foundation. The system is provided with a guide rail, and a linear motor is arranged on the guide rail. The system, further provided with multiple hydrostatic oil cushions, is characterized in that two concentric side tracks are arranged on the inner side and the outer side of a central track respectively, the central track is provided with a stator of the linear motor, the multiple hydrostatic oil cushions on supporting surfaces of support frames are supported on the inner circular side track and the outer circular side track, a connecting mechanism is arranged on each frame support, the frame supports and a moving structure are in kinematic pair flexible connection, each frame support includes a diaphragm connector with vertical flexibility and horizontal rigidity and is positioned in the central region of a connecting device, a rigid plate parallel to the upper side of each frame support is supported above the diaphragm connector, and elastic bodies and a magnetorheological damper are arranged between the two element support frames and the rigid plate. The invention ensures that the motor is positioned correctly and the gap is quite small and constant. Kinematic pair flexible connection ensures smooth, accurate and ultra-low speed operation of the telescope.
Description
technical field [0001] The invention relates to a flexible airborne system for azimuth shafting support and precision drive of a super-large telescope, in particular to an integrated system design based on kinematic pair connection with two functions of bearing and drive. [0002] This invention is the result of the joint fund key project (A11) "Key Technology Research on the Active Surface of Large Radio Telescope" and the National Natural Science Foundation of China (11673045) "Research on Combination Control Method of Large-Aperture Astronomical Telescope Rack Based on Splicing Arc Motor" Research results. Background technique [0003] Since the azimuth shaft system of the ultra-large telescope has special requirements such as large load capacity, high motion accuracy and good stability, it is difficult for the structural size, load capacity and rotation accuracy of general-purpose thrust ball bearings and thrust roller bearings to meet their requirements, so When manufa...
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IPC IPC(8): G02B23/16H02K41/02
CPCG02B23/16H02K41/02H02K2201/03
Inventor 胡守伟崔向群李国平宋晓莉
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE