A Measuring Method for Radial Vibration of Engine Rotor
A technology of radial vibration and measurement method, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc.
Active Publication Date: 2019-08-23
AECC SHENYANG ENGINE RES INST
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[0004] The object of the present invention is to provide a kind of engine rotor radial vibration measurement method, to solve at least one problem existing in the background technology
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[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...
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The invention discloses a radial vibration measuring method of an engine motor, and relates to the technical field of engines. The method comprises the steps that 1) a radial vibration model of the engine rotor is established, and the engine motor comprises four blades at least; 2) when the rotating speed of an engine is N, a capacitor sensor measures the blade tip gap value l (i, N) and the blade arrival time value ti of all blades of the rotor; 3) according to the blade tip gap value l (i, N) and the blade arrival time value, obtained in the step 2), of the rotor, radial vibration data, including the vibration amplitude, frequency, phase and the blade tip gap direct flow, of the engine rotor is obtained by fitting via the relation formula l (i, N)= R-r-(r'-r).cos(2pifti-phi); and 4) processing software is used to draw a corresponding relation schema between the radial vibration data of the engine rotor and the rotating speed of the engine rotor. The method has the advantages that radial vibration information, measured in the engine research and development process, of the engine rotor can be used as basis for designing an active inhibition vibration system of the engine rotor.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a method for measuring the radial vibration of an engine rotor. Background technique [0002] The faults of aeroengine rotor system can be divided into structure, strength and vibration, among which the failure rate of vibration is the highest. During the use of the engine, there are many reasons that can cause rotor vibration: unbalanced rotor, grinding of rotating and static parts, thermal bending of the rotor, sudden unbalance of the rotor, rotor cracks, excessive rigidity difference between the two directions of the rotor, rotor instability, The rotor support is not concentric, the gap of the rotor support structure is loose, etc. With the rapid development of the modern aviation industry, the parameters of aero-engines are required to be continuously improved. The resulting rotor vibration accidents emerge in endlessly, causing huge economic losses and seriously restricting...
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IPC IPC(8): G01H11/06
CPCG01H11/06
Inventor 张龙韩鹏卓薛秀生黄瑛徐春雷
Owner AECC SHENYANG ENGINE RES INST