Harmonic component rotational speed balancing method in rotating machinery vibration analysis
A technology of rotating machinery and harmonic components, which is used in static/dynamic balance testing, machine/structural component testing, measuring devices, etc. It can solve the problem of insufficient information at a single measurement point, and achieve the effect of improving dynamic balance efficiency.
Inactive Publication Date: 2010-06-02
SOUTHEAST UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
For actual large rotors, single measuring point information is not enough
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] This embodiment is based on figure 1 Take the rotating machinery system shown as an example to analyze the harmonic component speed balance in the vibration of rotating machinery, refer to Figure 2-7 .
[0033] A method for balancing the rotational speed of harmonic components in the vibration of rotating machinery involved in this embodiment is:
[0034] (1) Obtain the vibration data of the tested rotor by measuring the vibration of the two bearings on the tested rotor during the start-up or shutdown of the unit, and decompose the vibration data at the same speed into symmetrical and anti-symmetrical vibrations according to the vector algorithm Harmonics.
[0035] The method of measuring the vibration of the two bearings on the tested rotor is:
[0036] Paste a reflective tape on the outer rotor, install a key phase sensor; install a vibration sensor (displacement, speed or acceleration) on the bearing seat, and introduce the sensor signal into a vibration measurin...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a harmonic component rotate speed balancing method in rotary mechanical vibration, comprising steps of obtaining vibration data A0 and B0 of two bearing seats of a rotor by measuring vibrations on two bearings of a measured rotor in machine set starting or stopping process; according to the vector algorithm, decomposing vibration data A0 and B0 of the two bearings at the same rotate speed into a symmetrical vibration harmonic component Ad0 and an antisymmetric vibration harmonic component Af0; charting a graph in which symmetrical vibration harmonic component / antisymmetric vibration harmonic component of the measured rotor changes with the rotate speed, with the rotate speed as x-coordinate and symmetrical vibration harmonic component / antisymmetric vibration harmonic component as y-coordinate; charting a standard graph in which the symmetrical vibration harmonic component changes with the rotate speed in a rotate speed increasing process, and charting a standardgraph in which the antisymmetric vibration harmonic component changes with the rotate speed in a rotate speed increasing process; and respectively comparing the graph in which the symmetrical vibration harmonic component of the measured rotor changes with the rotate speed and the graph in which the antisymmetric vibration harmonic component of the measured rotor changes with the rotate speed withthe standard graphs and analyzing, thus judging unbalanced positions and unbalanced types.
Description
technical field [0001] The invention relates to a method for balancing the rotational speed of a harmonic component in the vibration of a rotating machine, which helps technicians analyze the unbalanced type and unbalanced position of a rotor. The main application areas include: power, metallurgy, petrochemical, aviation and other large rotating machinery, such as steam turbines, compressors, generators, gas turbines, pumps, fans, etc. Background technique [0002] Vibration is an important factor affecting the safe and stable operation of rotating machinery. Mass unbalance is the most common vibration fault of rotating machinery, accounting for more than 80% of the total faults. Accurate determination of unbalanced position and unbalanced type can effectively improve dynamic balancing efficiency and reduce the number of start-ups. It has important application significance for large rotating machinery such as steam turbines, generators, and compressors. [0003] At present...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/16
Inventor 杨建刚田永伟刘振祥
Owner SOUTHEAST UNIV