Radial sliding bearing dynamic characteristic testing device based on non-contact electromagnetic vibration exciters

Abstract

The invention discloses a radial sliding bearing dynamic characteristic testing device based on non-contact electromagnetic vibration exciters, which is characterized in that four sets of electromagnetic vibration exciters which are orthogonally distributed along the circumferential direction of a rotor are respectively arranged at two ends of the rotor, the electromagnetic vibration exciters are in clearance fit with the rotor, and a clearance is also formed between the adjacent electromagnetic vibration exciters; a force sensor is arranged between each set of electromagnetic vibration exciter and a stator support; the positions, which are close to the electromagnetic vibration exciters, of the two ends of the rotor are each provided with at least two orthogonally-distributed displacement sensors, controllable and non-contact electromagnetic excitation force or electromagnetic torque is applied to the rotor through the electromagnetic vibration exciters, the radial displacement of the rotor under the action of radial electromagnetic force or electromagnetic torque is detected through the displacement sensors, and the controllable non-contact excitation and dynamic characteristic test of the radial sliding bearing is realized. The device can realize controllable non-contact excitation and vibration response detection of the radial sliding bearing, and can be used for measuring the dynamic characteristic coefficient of the radial sliding bearing.

Description

technical field [0001] The invention relates to the technical field of sliding bearing performance testing, in particular to a dynamic characteristic testing device for radial sliding bearings based on a non-contact electromagnetic exciter. Background technique [0002] As an important basic component in rotating machinery, sliding bearings have the characteristics of high operating speed, strong load capacity, and small vibration and impact. They occupy an irreplaceable position in applications requiring high speed, heavy load, and high precision. The dynamic characteristics of sliding bearings are a key indicator of sliding bearing performance, which not only reflects the load-carrying characteristics of the lubricating oil film, but also has an important impact on the dynamic behavior of the entire rotor system supported by the bearing. Sliding bearings that bear radial loads are called radial sliding bearings. At present, four radial stiffness coefficients and four radia...

AI Technical Summary

Problems solved by technology

At present, most of the test devices or platforms can only load the exciting force in a certain direction, and it is difficult to make the rotor bear the exciting force or torque in any direction, and it is impossible to effectively simulate the operating conditions when the rotor axis is tilted. Measuring 4 stiffness coefficients and 4 damping coefficients of the oil film, it is difficult to measure additional angular stiffness coefficients and angular damping coefficients, and the applicable working conditions are limited

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