Intelligent controllable bearing and method for controlling rotor vibration

Abstract

The invention provides an intelligent controllable bearing and a method for controlling rotor vibration. The bearing comprises an excitation system, a bearing block, a bearing shell, a bearing bush and a floating ring. Magnetorheological fluid is adopted as a lubricating agent. After the magnetorheological fluid is supplied, the shaft neck and the inner surface of the floating ring form a lubricating oil film, namely, an inner oil film, and the outer surface of the floating ring and the bearing bush form a lubricating oil film, namely, an outer oil film. The property of the magnetorheological fluid is changed by the magnetic field generated by the excitation system, the property of the lubricating oil films is further changed, and intelligent behaviors of the bearing are achieved. The floating ring rotates at the speed lower than that of a rotary shaft. By means of the external magnetic field, stiffness and damping characteristics of the bearing are changed, so that vibration control of a rotor is achieved. The method is suitable for rotor occasions sensitive to vibration, and semi-active control over a rotor system can be easily achieved.

Description

technical field [0001] The invention relates to the field of hydrodynamic lubrication and intelligent materials, in particular to an intelligent controllable bearing, especially an intelligent controllable floating ring bearing lubricated by magneto-rheological fluid, and a method for controlling rotor vibration. Background technique [0002] With the advancement of technology, ferrofluid, magnetorheological fluid and other smart fluids whose properties can be changed by an external magnetic field have been widely used in industrial production. The characteristic of this type of fluid is that ferromagnetic particles are dispersed in a certain matrix. When an external magnetic field is applied, the ferromagnetic particles will undergo changes such as accumulation and chain formation under the influence of the magnetic field, and the fluid can rapidly change its properties macroscopically. After the magnetic field is removed, the fluid can recover its general characteristics i...

AI Technical Summary

Problems solved by technology

In both patents, the damping is adjusted, and the bearing stiffness cannot be adjusted; at the same time, the second patent cannot artificially change the bearing damping due to the passive control method

These weaknesses can weaken the effectiveness of patent application and limit the application occasions of patent

On the other hand, in many industrial applications, such as gas turbines, turbines, etc., due to the large bearing load, rolling bearings cannot be used, and hydrodynamic lubricated bearings must be used. At this stage, there is no intelligent controllable bearing suitable for these occasions.

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