Radio Telescope Actuator Replacement Mechanism

Abstract

The invention discloses an actuator replacement mechanism of a radio telescope. The actuator replacement mechanism comprises a left pull rod assembly and a right pull rod assembly, the upper ends of the pull rod assemblies are connected with upper connecting rods and connected with lower stay cables via the upper connecting rods, the lower ends of the pull rod assemblies are connected with hydraulic cylinders respectively, and the hydraulic cylinders are connected with an actuator base. The pull rod assemblies are provided with sleeves, telescopic rods are arranged in the sleeves, the upper ends of the telescopic rods are connected with the upper connecting rods, the bodies of the telescopic rods are provided with a plurality of annular grooves circumferentially, and two locking mechanisms are oppositely arranged on outer sleeves of the sleeves, extend into the sleeves from shear keys and are matched with the annular grooves of the telescopic rods so as to limit the telescopic rods. The locking mechanisms are provided with flexible shafts to telescopically control the shear keys, and control handles of the flexible shafts are arranged near the lower ends of the sleeves.

Description

technical field [0001] The invention relates to a radio telescope actuator replacement mechanism capable of remotely controlling rods to slide or lock in the axial direction. Unload the load. Background technique [0002] The 500m aperture spherical radio telescope FAST (Five-hundred-meter Aperture Spherical radio Telescope) will be the largest and most sensitive radio astronomy telescope in the world. Using the karst depression in Guizhou as the station site, lay a 500m spherical crown reflector in the depression, form a parabola through active control to converge electromagnetic waves, and use a light steel cable to drag the feed platform to realize the pointing and tracking of the telescope. [0003] When the telescope is observing, the actuator is used to drive the pull-down cable to change the surface shape of the reflector unit to track celestial bodies. The actuator is an integrated unit of mechanics, electricity and hydraulics. It works in the wet and lowlands of Q...

AI Technical Summary

Problems solved by technology

In the original invention, the pull rod is composed of upper and lower positive and negative screw rods and an intermediate sleeve. The pull rod can be extended or shortened by turning the intermediate sleeve in different directions. However, for a large-sized pull rod with a change of 1.2m, the adjustment is very difficult. And the adjustment speed is slow, it is difficult to achieve the purpose of quick replacement of the actuator

At the same time, the maximum vertical angle of the actuator axis is about 56°, and the slope of some depressions is steep, and the vertical distance between the lower end of the pull cable and the ground will be greater than 3m, making it difficult to touch the middle sleeve of the original invention, which is inconvenient for failure Actuator replacement

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