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

A technology for static and dynamic characteristics and stability testing, applied in the direction of mechanical bearing testing, etc., which can solve the problems of large gap, discontinuous test state, and large amount of calculation and calculation for multiple measurements.

Active Publication Date: 2017-05-10
HENAN UNIV OF SCI & TECH
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  • Description
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  • Application Information

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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

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

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Embodiment Construction

[0072] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0073] Such as figure 1 and figure 2 As shown, the method for testing the static and dynamic characteristics and stability of the miniature gas bearing provided by the embodiment of the present invention includes the following steps:

[0074] 1) Calibrate the initial position of the test bearing rotor before the test

[0075] Turn on the laser displacement sensor. At this time, the rotor of the test bearing is in contact with the outer ring of the bearing seat at the lowest point, and the Y-axis laser displacement sensor records the initial maximum value of the Y-axis at this time y 0max , Lift the rotor of the test bearing along the Y-axis to the highest point contact with the outer ring of the bearing housing, and the...

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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...

Claims

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Application Information

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IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 贾晨辉张海江高靖马文锁邱明崔志武贠永胜王振清
Owner HENAN UNIV OF SCI & TECH
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