Active vibration isolation shafting assembly with long life and high precision for space

Abstract

The invention discloses an active vibration isolation shafting assembly with long life and high precision for space. The active vibration isolation shafting assembly comprises an upper bearing, a lower bearing, a labyrinth seal gland, a supporting shaft, a bearing seat and an outer sleeve, wherein the upper bearing and the lower bearing are a pair of angular contact ball bearings and are arrangedon the supporting shaft in a sleeving manner in a back-to-back mounting manner; the bearing seat is arranged outside the upper bearing and the lower bearing in a sleeving manner; a spiral channel is formed in the surface of the bearing seat; the labyrinth seal gland is arranged on the outer end surface of the bearing seat and is used for axially positioning the upper bearing and the lower bearing;the outer sleeve is arranged outside the bearing seat, and a closed cavity is formed between the outer sleeve and the spiral channel of the bearing seat; and the cavity is filled with an electrorheological fluid damping material. The service life of the bearings is greatly prolonged, active vibration isolation is achieved, and the rotating precision and the control precision of the shafting assembly are improved.

Description

technical field [0001] The invention serves the technical field of satellite drive mechanism design, and in particular relates to a space-use long-life high-precision active vibration-isolation shaft assembly. Background technique [0002] The drive mechanism is developed along with the development of satellite payloads. It is mainly used to realize the one-dimensional or multi-dimensional movement of various payloads under space environment conditions. It can realize the search of payloads in a specific way, real-time tracking of targets, and specific Regional orientation and other functions. With the continuous increase in the number of satellites in orbit and the continuous deepening of space attack and defense technologies, the demand for high-precision, stable control, long-life and reliable service of space vehicles is becoming increasingly strong. The shaft assembly is an important rotating support part of the drive mechanism, and its design directly determines the c...

AI Technical Summary

Problems solved by technology

Under such working conditions, the shafting components usually have poor lubrication state. After the lubrication state deteriorates, the friction performance decreases, the friction torque is unstable, and problems such as increased operating current, abnormal speed response, and stagnation occur, which cause serious damage to the satellite. In addition to attitude disturbances, the design life and reliability are difficult to meet the requirements

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