Automatic continuous dynamic loading method for testing the load-carrying characteristics of air-floating ball bearings

Abstract

The invention discloses an automatic continuous dynamic loading method for testing bearing characteristics of an air floating ball bearing. An existing air bearing ball bearing performance detection bearing force cannot be continuously loaded. According to the method, a computer can be used for controlling a loading device through a controller to apply continuously adjustable dynamic loading forceaccording to experimental requirements; any dynamic signal such as a sinusoidal signal, a square wave signal and a slope signal can be set in an experiment process, different bearing forces are generated according to different input signals, and performance parameter measurement of the air floating ball bearing under the action of different bearing forces can be achieved. Moreover, when a constant value signal is input, a loading mechanism outputs a constant continuous loading force, and the dynamic characteristics of the bearing under the constant value loading effect can be measured; on-line detection can be realized through real-time recording and analysis of measured data by the computer. According to the method, the bearing characteristics of the air floating ball bearing in different working states can be simulated.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, and in particular relates to an automatic continuous dynamic loading method for testing the bearing characteristics of an air-floating ball bearing. Background technique [0002] Air bearings have the advantages of high motion accuracy, low frictional resistance and strong adaptability. They are widely used in precision equipment such as air bearing platforms, precision spindles and gyroscopes. They are ideal supports for ultra-precision measuring instruments. [0003] In order to meet the requirements of the application field for the air bearing ball bearing, it is necessary to analyze the influence of each parameter on the bearing performance, and then complete the parameter optimization design. The performance test of the air-floating ball bearing is mainly to measure the static performance indicators such as the load-carrying capacity of the air-floating ball bearing under diffe...

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Problems solved by technology

Weight type: the weight is used to apply pressure to the bearing under test, continuous loading cannot be achieved, and the flexibility is not high; spring type: the elastic force of the spring is used to apply pressure to the bearing under test, and the elastic element in the spring affects the vibration of the bearing under test Characteristics; Cylinder type: The output force of the cylinder is used to apply pressure to the bearing under test. Due to the fluctuation of the air supply pressure of the cylinder and the influence of gas leakage, the loading force is unstable, and the compressibility of the gas inside the cylinder will affect the vibration characteristics of the bearing under test.

These loading methods have defects such as being unable to load continuously and affecting the dynamic characteristics of the bearing.

At present, scholars such as Wang Wen and Tang Chaofeng of Hangzhou Dianzi University have designed a performance testing device and method for air-floating ball bearings. The device uses a cylinder-type loading method, and the device has the defect that it cannot be continuously loaded during the experiment. Therefore, it is impossible to study the dynamic characteristics of the continuous load borne by the air-floating ball bearing in practical applications, and the application range is narrow

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