Permanent magnetic suspension support shafting structure suitable for Antarctic astronomical telescope

Abstract

A permanent magnetic suspension support shafting structure is characterized in that a radial load bearing and an axial location bearing are arranged on a height shaft; a support shafting structure of an azimuth shaft is arranged between a rotor and a telescope base of an azimuth shaft system; the radial load bearing of the height shaft adopts a permanent magnetic suspension bearing; the permanentmagnetic repulsion force between the moving ring of the bearing and a fixed magnetic plate counteracts the weight of the tube of the telescope; the axial location bearing of the height shaft is located by a Si3N4 ceramic bearing; a non-load location bearing of the azimuth shaft is supported by a Si3N4 ceramic bearing; a load location bearing of the azimuth is supported by a permanent magnetic axial bearing; and the permanent magnetic force generated between the moving magnetic ring and the fixed magnetic ring of the permanent magnetic axial bearing counteracts the weight of the telescope. Thepermanent magnetic suspension support shafting structure solves the problems of mechanical bearing of the Antarctic astronomical telescope, such as bearing lubrication, thermal expansion and contraction, low-speed crawling under heavy loads and the incapability of using the liquid hydrostatic bearing, thereby creating the conditions for high-accuracy tracking and large-diameter development of theAntarctic astronomical telescope.

Description

[0001] technical field [0002] The invention relates to a magnetic suspension supporting structure for the main shaft of an astronomical telescope at the south pole. The main axis of a horizon-level telescope usually refers to the azimuth axis and the altitude axis of the telescope, such as figure 1 shown. The azimuth axis 5 points vertically to the zenith, and the entire telescope rotates around the azimuth axis 5 . The telescope lens barrel 1 is supported on the fork arm 3 through the height axis 2, and the lens barrel rotates around the height axis. The altitude axis is perpendicular to the azimuth axis, and the tracking and observation of the stars in the sky can be realized by the telescope through the rotation of the azimuth axis and the altitude axis. [0003] The commonly used support bearings for the main shaft of astronomical telescopes include mechanical bearings and hydrostatic bearings. When the supported load is large, the difference between the static fricti...

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