Fault diagnosis method of compressor shafting based on three-dimensional space axle center orbit

Abstract

The invention discloses a fault diagnosis method of a compressor shafting based on a three-dimensional space axle center orbit, comprising the following steps: (1) detecting radial vibration signals x(t) and y(t) of a compressor rotor; (2) detecting an axial vibration signal z(t) of the compressor rotor; (3) carrying out low-pass filtering on the vibration signals to eliminate a high-frequency interference signal; (4) acquiring the three-dimensional axle center orbit w(t); (5) forming the three-dimensional axle center orbit; (6) respectively filtering the vibration signals x(t), y(t) and z(t) in three directions and then reconfiguring the vibration signals in a time domain to obtain the three-dimensional filter axle center orbit; and (7) synthesizing the vibration signals using a spectrum analysis principle to obtain the synthesized axle center orbit. The invention provides a three-dimensional vibration analysis method on the basis of a holo-spectrum technology, and the method comprises synthesized three-dimensional vibration analysis and filter three-dimensional vibration analysis, which can more clearly and vividly reflect running status and fault characteristics of equipment. Rotor vibration comprises horizontal, vertical and axial vibration, and the vibration signals in the three directions are synthesized to form the three-dimensional axle center orbit which comprises the three-dimensional filter axle center orbit and the three-dimensional synthesized axle center orbit. The method can really reflect motion situation of the axle center of the rotor and provide more complete information for the fault diagnosis.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of mechanical equipment and the like, and relates to the analysis and processing of mechanical vibration signals, in particular to a method for diagnosing faults of a compressor shaft system based on a three-dimensional space axis track. Background technique [0002] The rotor is the main part of the compressor, and its high operating speed and serious failure damage have always been the key object of compressor monitoring and diagnosis technology research. When the rotor rotates at high speed in the bearing, it not only rotates around its own center, but also whirls around a certain center. In the process of whirl, due to the periodic centrifugal force excitation, the rotor will produce lateral forced vibration, which will affect the smooth operation of the rotor and even cause serious equipment accidents. The trajectory of the vortex movement of the rotor's center of rotation is called the axis t...

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Problems solved by technology

In the process of vortex, due to the excitation of periodic centrifugal force, the rotor will produce lateral f

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