Method for separating centrifugal pump vibration signals from circulation water heat exchanger vibration signals
A vibration signal, centrifugal pump technology, applied in the testing of machines/structural parts, instruments, and mechanical parts, etc., can solve the trouble of fault diagnosis of circulating water heat exchangers, and the difficulty of separating vibration signals of centrifugal pumps.
Inactive Publication Date: 2018-06-12
GUANGDONG UNIV OF PETROCHEMICAL TECH
View PDF18 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In the fault diagnosis method of the circulating water heat exchanger based on the vibration signal, Fourier transform is used to convert the vibration signal to the time-frequency domain for analysis, which brings greater difficulties to the separation of the vibration signal of the centrifugal pump and affects the circulating water. Fault diagnosis of heat exchanger brings great trouble
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
[0039] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
[0040] A method for separating vibration signals of a centrifugal pump and a vibration signal of a circulating water heat exchanger, comprising:
[0041] Step 1, collect the mixed signal through the wireless vibration sensor, transmit the mixed signal to the computer through the wireless gateway, and the computer imports the vibration signal data into the MATLAB platform in the form of a matrix;
[0042] Step 2, after decomposing by EMD algorithm, a set of steady-state and linear data sequence sets are obtained, that is, the intrinsic mode functions of the intrinsic characteristic vibration forms of different signals;
[0043] The vibration signal data is decomposed by the EMD algorithm, and the specific process of obtaining the intrinsic mode function is as follows:
[0044] Let the sensor collect the mixed vibration signal as X(t)={x ...
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 method for separating centrifugal pump vibration signals from circulation water heat exchanger vibration signals. The method comprises the following steps that 1, a wirelesssensor collects mixed signals and transmits the mixed signals to a computer through a wireless gateway, and the computer imports vibration signal data to an MATLAB platform in a matrix mode; 2, afterEMD algorithm decomposition, a stable-state and linear data series set is obtained, and eigenmode functions of internal characteristic vibration forms of different signals are obtained; 3, the eigenmode functions are subjected to generalized S conversion of the height and width of a specific Gaussian window, the eigenmode functions which do not meet frequency requirements are set to be zero on thetime-frequency domain, the eigenmode functions which meet the frequency requirements are reserved, and finally data only containing vibration characteristics of a circulation water heat exchanger isobtained; in this way, the accuracy of fault diagnosis of the circulation water heat exchanger can be improved.
Description
technical field [0001] The invention relates to the field of vibration signal separation, in particular to a method for separating the vibration signal of a centrifugal pump from the vibration signal of a circulating water heat exchanger. Background technique [0002] In recent years, signal separation has achieved significant development and breakthroughs both at home and abroad. The application of diagnosing equipment faults through vibration signals is gradually increasing, but in practice, many equipment and environments also generate vibration and noise. These interfering vibration signals are transmitted through equipment and air, and are mixed with the fault source signals of the equipment we need to collect, which seriously interferes with fault diagnosis based on vibration signals. [0003] In the current fault diagnosis of circulating water heat exchangers based on vibration signals, since the centrifugal pump provides water flow power, its work will generate larg...
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 IPC IPC(8): G01H17/00G01M13/00G06F17/15
CPCG01H17/00G01M13/00G06F17/15
Inventor 黄剑锋熊碧波舒磊霍志强
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH