Static and dynamic characteristics and stability test method for micro gas bearing

Abstract

The invention relates to the field of micro gas bearing testing technology, and discloses a static and dynamic characteristics and stability test method for a micro gas bearing. The method includes the following steps of 1) before test, calibrating an initial position of a test bearing rotor; 2) continuously acquiring test data of the test bearing rotor; and 3) conducting calculation to obtain static and dynamic characteristic parameters and graphs of the test bearing rotor, and judging the stability of the test bearing rotor; and conducting calculation and solution by substituting the test data into a model equation of MATLAB to obtain the stiffness and damping of the test bearing rotor in different working conditions, constructing a stability characteristic equation according to the stiffness and damping, and judging the stability of the test bearing rotor according to the stability characteristic equation and the bearing stability theory. The stability test and control method for the micro gas bearing is easy to operate and small in calculation amount, and can be used for continuously measuring and calculating the static and dynamic characteristic parameters of the test bearing rotor in different working conditions and judging the stability of the test bearing rotor.

Description

technical field [0001] The invention relates to the field of miniature gas bearing testing, in particular to a method for testing static and dynamic characteristics and stability of a miniature gas bearing. Background technique [0002] In recent years, with the rapid development of the global economy and technology, high-end equipment represented by aerospace, national defense equipment, high-end medical care and robots is developing in the direction of high speed, miniaturization and intelligence. Gas bearings have become an indispensable part of high-speed rotating machinery due to their advantages of low friction, high speed, long life, high efficiency, cleanliness and environmental protection, and provide a technical solution for the development of high-speed machinery. Due to the principle of gas bearing bearing, when the working speed of gas bearing exceeds its critical speed for stable operation and enters high-speed and ultra-high-speed operation, gas film oscillati...

AI Technical Summary

Problems solved by technology

The test and calculation method of the present invention is a real-time continuous test detection and online calculation test scheme for each operating state of the gas bearing on the existing gas bearing test bench, which overcomes the many assumptions in the existing gas bearing method , The gap between the gas bearing test condition and the actual use condition is large, the test state is discontinuous, and the shortcomings of multiple measurements and multiple calculations are the shortcomings of the invention patent that has been applied for. The application number is 201610526871.6, and the name is "a micro gas Bearing testing machine and test method" based on

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