Aerostatic Bearing Based on Passive Vibration and Energy Dissipation Based on Additional Mass Motion

Abstract

The invention belongs to the field of spacecraft physics simulation. The invention provides an aerostatic bearing based on passively induced vibration and energy consumption of additional mass motion. When the aerostatic bearing vibrates axially, it is driven to be connected to the bearing main body (200). One end of the flexible thin plate (300) on the cavity wall generates axial vibration at the same frequency at the same time, and the additional mass (400) fastened to the other end of the flexible thin plate (300) lags behind the bearing main body (200) through the flexible thin plate (300). Passive axial vibration of different frequencies, the energy generated by the vibration of the bearing main body (200) is dissipated through the passive vibration of the additional mass (400), so as to realize the vibration suppression of the gas hydrostatic bearing, without changing the bearing capacity The gas static pressure bearing has the advantages of high stability, simple structure, large load capacity, etc., and can be used in the applicable occasions of large load capacity and high stability gas static pressure bearing.

Description

technical field [0001] The invention relates to the field of physical simulation of spacecraft, and in particular, to a gas-static bearing with passive vibration-induced energy consumption based on motion of additional mass. Background technique [0002] Aerostatic bearings are widely used in spacecraft micro-low gravity environment simulation, ultra-precision machining and measuring equipment, medical testing equipment and other fields due to their high motion accuracy, high motion speed and non-contact working characteristics. Due to the high compressibility of gas, it is difficult to take into account the bearing capacity, stiffness and stability of aerostatic bearings, which has become a key technical difficulty restricting the development of aerostatic bearing technology and engineering applications. With the continuous improvement of motion accuracy and motion speed requirements in precision and ultra-precision equipment, the motion characteristics of gas turbulence br...

AI Technical Summary

Problems solved by technology

Significantly reduces the damage of external vibration and shock to the static and dynamic performance of the bearing system, and the processing is simple, but this technology significantly increases the internal air cavity of the air bearing, resulting in the reduction of the stiffness of the air bearing and other problems

The double-layer air bearing mentioned in the patent CN104533954A, through the multi-level air bearing, significantly increases the bearing capacity and stiffness of the air bearing, but it will bring a significant increase in installation difficulty, and at the same time, the nonlinear loss of fluid motion issues such as increased risk

Patent CN200999795Y mentions an elastically deformable air bearing. Only the annular plane around the concave spherical surface on the working surface has a small area of ​​contact with the guide rail surface, and at the same time, the compressed air can easily fill the air cavity of the concave core to ensure the working stability. However, this technology Insufficient bearing capacity

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