Bearing capacity calibration method of dynamic pressure thrust gas bearing

Abstract

The invention discloses a bearing capacity calibration method of a dynamic pressure thrust gas bearing. The calibration method comprises the following steps: starting a bearing capacity calibration system; the current friction torque of the dynamic pressure thrust gas bearing is measured through a monitoring device; continuously increasing the load; according to the real-time friction torque measured by the monitoring device, the contact state of the dynamic pressure thrust gas bearing and the thrust plate is judged by the control device every preset time interval; if not, the current rotating speed, load, friction torque and the distance between the thrust plate and the bearing bottom plate are stored by the control device; if so, immediately reducing the applied load of the load applying device; comparing the current rotating speed of the rotor driving device with the final calibration rotating speed, and if the rotating speed reaches the final calibration rotating speed, drawing a calibration curve by using a least square method; and if not, increasing the rotating speed of the rotor driving device. According to the calibration method, the bearing capacity of the bearing can be calibrated without manual participation, and the problems of design and model selection of existing bearings are solved.

Description

technical field [0001] The invention relates to the technical field of gas bearings, in particular to a bearing capacity calibration method of a dynamic pressure thrust gas bearing. Background technique [0002] Dynamic thrust gas bearings have been widely used in new energy vehicles, aerospace, low temperature refrigeration and other fields due to their advantages of no pollution, low friction resistance, long operating life and no need for additional gas supply systems. The bearing capacity of the dynamic pressure thrust gas bearing is one of the important parameters of the bearing, but the bearing capacity of the dynamic pressure thrust gas bearing is greatly affected by the rotational speed and the air film gap, and there is a certain nonlinear relationship, which is difficult to obtain by simple calculation. [0003] like figure 1 As shown, the dynamic pressure thrust gas bearing 1 includes a foil 2 and a bearing base plate 3 , wherein the foil 2 includes a corrugated ...

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Problems solved by technology

[0004] In view of this, the present invention provides a method for calibrating the bearing capacity of a dynamic pressure thrust gas bearing. Design and Selection Difficulties of Pressure Thrust Gas Bearings

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