CN107246936A - Determine the method and device of rotary machine rotor unbalance phase - Google Patents
Determine the method and device of rotary machine rotor unbalance phase Download PDFInfo
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- CN107246936A CN107246936A CN201710402811.8A CN201710402811A CN107246936A CN 107246936 A CN107246936 A CN 107246936A CN 201710402811 A CN201710402811 A CN 201710402811A CN 107246936 A CN107246936 A CN 107246936A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
- G01M1/16—Determining unbalance by oscillating or rotating the body to be tested
- G01M1/22—Determining unbalance by oscillating or rotating the body to be tested and converting vibrations due to unbalance into electric variables
Abstract
The invention provides a kind of method and device for determining rotary machine rotor unbalance phase, wherein, this method includes：Obtain the key signal time domain sampled data and main shaft throw signal time domain sampled data of rotary machine rotor；Key signal time domain sampled data is converted into key signal frequency domain data；Main shaft throw signal time domain sampled data is converted into main shaft throw signal frequency domain data；According to key signal frequency domain data, calculate key signal and turn the corresponding phase of frequency component；According to main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；The corresponding phase of frequency component and main shaft throw signal are turned according to key signal and turn the corresponding phase of frequency component, rotary machine rotor unbalance phase is determined.Above-mentioned technical proposal improves the degree of accuracy for determining unbalance mass, phase, simplifies calculating process.
Description
Technical field
The present invention relates to rotating machine art field, more particularly to a kind of side for determining rotary machine rotor unbalance phase
Method and device.
Background technology
Rotating machinery refers to rely primarily on the machinery that spinning movement completes specific function.Typical rotating machinery has steamer
Machine, gas turbine, centrifugal and Axial Flow Compressor, blower fan, pump, the hydraulic turbine, generator and aero-engine etc..
With the development of science and technology with the requirement of the modernization of industry, rotating machinery develops towards precise treatment, high speed, this
It is just more and more harsher to the performance requirement of rotating machinery, the especially core component rotor of rotating machinery.If rotor exists uneven
Weighing apparatus, then will produce centrifugal force, centrifugal moment or both and have both at the same time, so as to cause rotor to bend and planted agent when rotating machinery is run
Power, makes unit produce vibration and noise, this has speeded up bearing, the abrasion of axle envelope, and reducing unit operating efficiency and shortening makes
Use the life-span.According to statistics, in a variety of causes for causing rotating machinery abnormality, the proportion shared by rotor unbalance is maximum
, 30% is generally accounted for, shared proportion is bigger in high-speed rotating machine.Therefore, it is highly desirable to whirler
The rotatable parts of tool enter action balance inspection, if there is unbalance dynamic phenomenon, and rotatable parts are carried out dynamic balance weight to subtract
The vibration of small unit, reaches the level of unit energy safe and stable operation.And the most key in dynamic balance weight is exactly true
Determine the orientation (or phase) of unbalance mass,.
The technical scheme of some determination rotary machine rotor unbalance phases is provided in the prior art, but these technical sides
The problem of case generally existing degree of accuracy is low, calculating process is complicated.
The content of the invention
The embodiments of the invention provide a kind of method for determining rotary machine rotor unbalance phase, rotation is determined to improve
The degree of accuracy for tool rotor unbalance phase of making a connection, simplifies calculating process, and this method includes：
Obtain the key signal time domain sampled data and main shaft throw signal time domain sampled data of rotary machine rotor；
Key signal time domain sampled data is converted into key signal frequency domain data；By main shaft throw signal time-domain sampling number
According to being converted to main shaft throw signal frequency domain data；
According to key signal frequency domain data, calculate key signal and turn the corresponding phase of frequency component；According to main shaft throw signal
Frequency domain data, calculates main shaft throw signal and turns the corresponding phase of frequency component；
The corresponding phase of frequency component and main shaft throw signal are turned according to key signal and turn the corresponding phase of frequency component, it is determined that rotation
Favourable turn tool rotor unbalance phase.
In one embodiment, when obtaining the key signal time domain sampled data and main shaft throw signal of rotary machine rotor
Domain sampled data, including：
According to rotating machinery generating unit speed, the key signal time domain for choosing the integral multiple swing circle of rotary machine rotor is adopted
Sample data and main shaft throw signal time domain sampled data.
In one embodiment, according to rotating machinery generating unit speed, the integral multiple swing circle of rotary machine rotor is chosen
Key signal time domain sampled data and main shaft throw signal time domain sampled data, including：
According to rotating machinery generating unit speed, the key signal time domain of 8 to 10 swing circles of rotary machine rotor is chosen
Sampled data and main shaft throw signal time domain sampled data.
In one embodiment, when obtaining the key signal time domain sampled data and main shaft throw signal of rotary machine rotor
After the sampled data of domain, in addition to：
Key signal time domain sampled data is pre-processed, pretreated key signal time domain sampled data is obtained；
Key signal time domain sampled data is converted into key signal frequency domain data, including：
FFT is carried out to pretreated key signal time domain sampled data, pretreated key is believed
Number time domain sampled data is converted to key signal frequency domain data.
In one embodiment, key signal time domain sampled data is pre-processed, obtains pretreated key and believe
Number time domain sampled data, including：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, pre- place is obtained
Key signal time domain sampled data after reason.
The embodiment of the present invention additionally provides a kind of device for determining rotary machine rotor unbalance phase, to improve determination
The degree of accuracy of rotary machine rotor unbalance phase, simplifies calculating process, and the device includes：
Acquisition module, key signal time domain sampled data and main shaft throw signal time domain for obtaining rotary machine rotor
Sampled data；
Time-domain and frequency-domain conversion module, for key signal time domain sampled data to be converted into key signal frequency domain data；Will
Main shaft throw signal time domain sampled data is converted to main shaft throw signal frequency domain data；
Phase calculation module, the corresponding phase of frequency component is turned for according to key signal frequency domain data, calculating key signal；
According to main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；
Unbalance phase determining module, turns for turning the corresponding phase of frequency component according to key signal with main shaft throw signal
The corresponding phase of frequency component, determines rotary machine rotor unbalance phase.
In one embodiment, acquisition module specifically for：According to rotating machinery generating unit speed, rotary machine rotor is chosen
Integral multiple swing circle key signal time domain sampled data and main shaft throw signal time domain sampled data.
In one embodiment, acquisition module specifically for：According to rotating machinery generating unit speed, rotary machine rotor is chosen
8 to 10 swing circles key signal time domain sampled data and main shaft throw signal time domain sampled data.
In one embodiment, said apparatus also includes：Key signal pretreatment module, for being adopted to key signal time domain
Sample data are pre-processed, and obtain pretreated key signal time domain sampled data；
Time-domain and frequency-domain conversion module specifically for：
FFT is carried out to pretreated key signal time domain sampled data, pretreated key is believed
Number time domain sampled data is converted to key signal frequency domain data；
Fast Fourier Transform (FFT) is carried out to main shaft throw signal time domain sampled data, by main shaft throw signal time-domain sampling number
According to being converted to main shaft throw signal frequency domain data.
In one embodiment, key signal pretreatment module specifically for：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, pre- place is obtained
Key signal time domain sampled data after reason.
With determining rotary machine rotor unbalance phase in the prior art, there is deviation, the complicated technical side of calculating process
Case compares, because inventor considers that prior art is that unbalance phase, key signal are asked for using cross-correlation in time domain
Turn frequency component crest correspondence at the time of with key phase pulse it is corresponding at the time of there is deviation so that the unbalance phase tried to achieve and truly
There is deviation in phase, therefore, the embodiment of the present invention propose it is a kind of simply, be accurately determined the uneven phase of rotary machine rotor
The technical scheme of position：First, the key signal time domain sampled data and main shaft throw signal time domain for obtaining rotary machine rotor are adopted
Sample data；Then, key signal time domain sampled data is converted into key signal frequency domain data；Main shaft throw signal time domain is adopted
Sample data conversion is main shaft displacement signal frequency domain data；Finally, according to key signal frequency domain data, calculate key signal and turn frequency division
Measure corresponding phase；According to main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；According to
Key signal turns the corresponding phase of frequency component and main shaft throw signal and turns the corresponding phase of frequency component, determines rotary machine rotor not
Phase is balanced, the technical scheme improves the degree of accuracy for determining unbalance mass, phase, simultaneously in frequency-domain calculations unbalance phase
Calculating process is simplified, so as to reduce dynamic balance weight number of times and obtain good dynamic balance weight effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is to determine the schematic diagram that rotary machine rotor unbalance phase scheme is related in the prior art；
Fig. 2 is main shaft throw signal waveforms when determining rotary machine rotor unbalance phase in the prior art；
Fig. 3 is key signal oscillogram when determining rotary machine rotor unbalance phase in the prior art；
Fig. 4 is to determine that key signal turns the contrast of frequency component with it during rotary machine rotor unbalance phase in the prior art
(the original key signal before being pre-processed to key signal time domain sampled data turns frequency component correlation curve to oscillogram with it
Figure)；
Fig. 5 is the schematic flow sheet of the method for determination rotary machine rotor unbalance phase in the embodiment of the present invention；
Fig. 6 is the oscillogram pre-processed to key signal time domain sampled data in the embodiment of the present invention；
Fig. 7 is to carry out FFT post analysis signal to key signal time domain sampled data in the embodiment of the present invention
Figure；
Fig. 8 is to carry out Fast Fourier Transform (FFT) post analysis to main shaft throw signal time domain sampled data in the embodiment of the present invention
Schematic diagram；
Fig. 9 is the structural representation of the device of determination rotary machine rotor unbalance phase in the embodiment of the present invention；
Figure 10 be key signal after being pre-processed to key signal time domain sampled data in the embodiment of the present invention with
It turns frequency component contrast curve.
Embodiment
It is right with reference to embodiment and accompanying drawing for the object, technical solutions and advantages of the present invention are more clearly understood
The present invention is described in further details.Here, the exemplary embodiment of the present invention and its illustrating to be used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
Determine that the method for rotary machine rotor unbalance phase is generally：As shown in figure 1, pasting a key phase on the rotary shaft
Block, rotary shaft, when key phase block is rotated at eddy current sensor on axle, eddy displacement sensor are directed at eddy displacement sensor
Pulse output will be produced as benchmark key signal.The throw of axle is measured with eddy displacement sensor simultaneously, when uneven matter
When measuring point (high point) rotation to throw eddy current sensor, the distance that eddy displacement sensor is measured diminishes, therefore, throw time domain ripple
Shape turns the trough of frequency component and the phase difference of key phase pulse is the angle of high point backwardness key phase block.In Fig. 1,Represent uneven
Weigh quality phase, and u represents main shaft throw signal, and V represents that the eddy current displacement for measuring key signal and main shaft throw signal is sensed
Device.
Prior art is mutual with standard sine signal and cosine signal using main shaft throw signal, key signal
Correlation is asked for, below prior art is asked for unbalance phase scheme be introduced it is as follows.
If key signal is represented with p (t), main shaft throw signal is represented with v (t), then key signal and main shaft throw signal
It can be indicated in a period of time [0, T] with following formula：
Wherein, A0For the DC component in key signal；AiFor the amplitude of each component in key signal；αiFor key signal
In each component phase；ω be key signal in turn frequency frequency values；s1(t) it is the noise jamming in key signal；
Wherein, B0For the DC component in main shaft displacement signal；BiFor the amplitude of each component in main shaft displacement signal, βiFor
The phase of each component in main shaft throw signal；ω be main shaft displacement signal in turn frequency frequency values；s2(t) it is main shaft displacement signal
In noise jamming；
A standard sine signal and a standard cosine signal are constructed, is expressed as follows：
Z (t)=sin ω t, t ∈ [0, T]；
Y (t)=cos ω t, t ∈ [0, T].
Cross-correlation analysis all is done with p (t) to Z (t) and Y (t).According to the orthogonality of fourier series, in key signal
DC component and harmonic and Z (t), Y (t) cross-correlation functions are zero, random noise component s1(t) with Z (t), Y's (t) is mutual
Correlation function is also to go to zero.
So key signal and the cross-correlation function of sinusoidal signal have in τ=0：
The cross-correlation function of key signal and cosine signal has in τ=0：
Order
If α1First quartile, then α1=θ；
If α1Second and third quadrant, then α1=θ+π；
If α1Fourth quadrant, then α1The π of=θ+2.
Similarly, vibration signal v (t) and Z (t) can be obtained, the value of Y (t) cross-correlation function in τ=0 obtains β, together
When can also obtain vibration amplitude Ai：
Phase difference can thus be obtained and turn frequency vibration width.
The shortcoming that prior art asks for unbalance phase technical scheme is as follows：
(1) calculating process is complex；
(2) unbalance phase and true unbalance phase that this method is tried to achieve may have certain deviation, name
Example explanation.
Main shaft throw signal waveforms that certain rotating machinery is measured as shown in Fig. 2 key signal oscillogram as shown in figure 3,
In fig. 2：Abscissa is the time, and unit is the second, and ordinate is main shaft displacement signal；In figure 3, abscissa is time, unit
For the second, ordinate is key signal.
This method is to try to achieve the difference for being throw signal transfer frequency component phase with key signal transfer frequency component phase.If
There is deviation in the crest correspondence moment of key signal transfer frequency component, then the unbalance phase tried to achieve with the key phase pulse corresponding moment
And there is deviation certainly in true phase.Key signal turns the time domain beamformer of frequency component as shown in figure 4, in Fig. 4 with it, horizontal to sit
The time is designated as, unit is the second, and left ordinate scale is turns frequency component, and unit is um, and right ordinate scale is key signal, and unit is
volt。
As shown in Figure 4, turn frequency component crest and there is the time difference with pulse, the time difference is about 0.011 second, and this causes unbalance phase
About 13.2 degree of deviation.
Because inventor considers to ask for unbalance phase in time domain in the prior art, key signal turns the crest of frequency component
And key phase pulse has deviation, there is deviation in the unbalance phase and true phase tried to achieve, therefore, the embodiment of the present invention has gone out one
Kind simply, the technical scheme of rotary machine rotor unbalance phase is accurately determined, the technical scheme is carried out below detailed
It is described below.
Fig. 5 is the schematic flow sheet of the method for determination rotary machine rotor unbalance phase in the embodiment of the present invention, such as Fig. 5
Shown, this method includes：
Step 101：Obtain the key signal time domain sampled data and main shaft throw signal time-domain sampling of rotary machine rotor
Data；
Step 102：Key signal time domain sampled data is converted into key signal frequency domain data；During by main shaft throw signal
Domain sampled data is converted to main shaft throw signal frequency domain data；
Step 103：According to key signal frequency domain data, calculate key signal and turn the corresponding phase of frequency component；According to main shaft
Throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；
Step 104：The corresponding phase of frequency component and main shaft throw signal are turned according to key signal and turn the corresponding phase of frequency component
Position, determines rotary machine rotor unbalance phase.
With determining rotary machine rotor unbalance phase in the prior art, there is deviation, the complicated technical side of calculating process
Case compares, because inventor considers that prior art is that unbalance phase, key signal are asked for using cross-correlation in time domain
Turn frequency component crest correspondence at the time of with key phase pulse it is corresponding at the time of there is deviation so that the unbalance phase tried to achieve and truly
There is deviation in phase, therefore, the embodiment of the present invention propose it is a kind of simply, be accurately determined the uneven phase of rotary machine rotor
The technical scheme of position：First, the key signal time domain sampled data and main shaft throw signal time domain for obtaining rotary machine rotor are adopted
Sample data；Then, key signal time domain sampled data is converted into key signal frequency domain data；Main shaft throw signal time domain is adopted
Sample data conversion is main shaft displacement signal frequency domain data；Finally, according to key signal frequency domain data, calculate key signal and turn frequency division
Measure corresponding phase；According to main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；According to
Key signal turns the corresponding phase of frequency component and main shaft throw signal and turns the corresponding phase of frequency component, determines rotary machine rotor not
Phase is balanced, the technical scheme is in frequency-domain calculations unbalance phase, and calculating process is simple, improves determination unbalance mass, phase
The degree of accuracy, while simplify calculating process, so as to reduce dynamic balance weight number of times and obtain good dynamic balance weight effect
Really.
In one embodiment, in above-mentioned steps 101, the key signal time domain sampled data of rotary machine rotor is obtained
With main shaft throw signal time domain sampled data, it can include：
According to rotating machinery generating unit speed, the key signal time domain for choosing the integral multiple swing circle of rotary machine rotor is adopted
Sample data and main shaft throw signal time domain sampled data.
When it is implemented, focal point is key signal and the frequency component that turns in main shaft throw signal, selection turns frequency component
That is the integral multiple of swing circle, it is ensured that in FFT turn frequency component frequency spectrum will not distortion, and then ensure that determination is uneven
The degree of accuracy of quality phase.
In one embodiment, according to rotating machinery generating unit speed, the integral multiple swing circle of rotary machine rotor is chosen
Key signal time domain sampled data and main shaft throw signal time domain sampled data, can include：
According to rotating machinery generating unit speed, the key signal time domain of 8 to 10 swing circles of rotary machine rotor is chosen
Sampled data and main shaft throw signal time domain sampled data.
When it is implemented, by substantial amounts of experiment, inventor has found that the rotating speed of rotating machinery can have certain fluctuation, if
Selection cycle very little, then may increase the calculating deviation of unbalance mass, phase, and selection cycle is too many, then can increase calculating
Amount.Therefore, the sampled data of 8 to 10 swing circles of rotary machine rotor is chosen, determination unbalance mass, phase is both improved
The degree of accuracy of position, in turn ensure that the calculating speed of unbalance mass, phase.
In one embodiment, when obtaining the key signal time domain sampled data and main shaft throw signal of rotary machine rotor
After the sampled data of domain, it can also include：
Key signal time domain sampled data is pre-processed, pretreated key signal time domain sampled data is obtained；
Key signal time domain sampled data is converted into key signal frequency domain data, can be included：
FFT is carried out to pretreated key signal time domain sampled data, pretreated key is believed
Number time domain sampled data is converted to key signal frequency domain data.
When it is implemented, in above-mentioned steps 102, key signal time domain sampled data is converted into key signal frequency domain number
According to FFT FFT can be passed through；Main shaft throw signal time domain sampled data is converted into main shaft throw signal frequency domain
Data can also pass through FFT FFT.
In one embodiment, key signal time domain sampled data is pre-processed, obtains pretreated key and believe
Number time domain sampled data, can include：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, pre- place is obtained
Key signal time domain sampled data after reason.
When it is implemented, above-mentioned preconditioning technique scheme can become key signal preferable key phase pulse signal, improve
Turn frequency component crest and the registration of key phase pulse after key signal FFT, so as to improve the computational accuracy of unbalance phase.
As shown in Figure 10, Figure 10 turns frequency component contrast curve for key signal after pretreatment with it.With original key signal in Fig. 4
Compared with turning frequency component contrast curve with it, key signal turns frequency component crest and key phase pulse after being pre-processed in Figure 10
Registration will substantially get well.
(key is set when it is implemented, carrying out pretreatment to key signal time domain sampled data and can be realized by following program
Believe that number is represented with Phase, threshold value is represented with YZ)：
For i=1:length(Phase)
If Phase(i)<YZ Then
Phase (i)=0
End If
Next。
When it is implemented, in above-mentioned steps 103, according to main shaft throw signal frequency domain data, calculating obtained main shaft pendulum
Degree signal, which turns the corresponding phase of frequency component, to be represented with α, according to key signal frequency domain data, calculate obtained key signal and turn
The corresponding phase of frequency component can be represented with β；So in above-mentioned steps 104, according to α, β calculates unbalance mass, phase theta
Formula can be：θ=β-(α+180).
Below as one example to illustrate how the embodiment of the present invention is implemented.From the main shaft throw of above-mentioned Fig. 2,3 and 4 letter
Number with key signal data carry out exemplifications set.
(1) generating unit speed is 200 revs/min, and swing circle is 0.3 second, chooses the data in 9 cycles.
(2) selected threshold is 7, key signal is pre-processed, pretreated waveform is as shown in Figure 6：
(3) pre-process after key signal frequency domain fft analysis figure as shown in fig. 7, main shaft throw signal frequency domain fft analysis figure such as
Shown in 8.
Key signal turns frequency component phase for 118.3 degree as can be known from Fig. 7, as can be known from Fig. 8, main shaft throw signal transfer
Frequency component phase is 197.0 degree, so as to calculate unbalance phase θ=118.3- (197.0+180)+360=101.3 degree.
The computational methods simplify calculating process without calculating complicated as described in the prior art, meanwhile, result of calculation Billy uses
The result that prior art is asked for is more accurate.
In figure 6, abscissa is speed, and ordinate is key signal；In the figure 7, abscissa is frequency, and ordinate is key
Phase signals；In fig. 8, abscissa is frequency, and ordinate is main shaft displacement signal.
Based on same inventive concept, a kind of determination rotary machine rotor unbalance phase is additionally provided in the embodiment of the present invention
Device, as described in the following examples.Due to determining that the device of rotary machine rotor unbalance phase solves the principle of problem
It is similar to determining the method for rotary machine rotor unbalance phase, it is thus determined that the device of rotary machine rotor unbalance phase
Implementation may refer to determine the implementation of the method for rotary machine rotor unbalance phase, repeats part and repeats no more.It is following to be made
, term " unit " or " module " can realize the combination of the software and/or hardware of predetermined function.Although following examples
Described device is preferably realized with software, but hardware, or the combination of software and hardware realization be also may be simultaneously
It is contemplated.
Fig. 9 is the structural representation of the device of determination rotary machine rotor unbalance phase in the embodiment of the present invention, such as Fig. 9
Shown, the device includes：
When acquisition module 02, key signal time domain sampled data and main shaft throw signal for obtaining rotary machine rotor
Domain sampled data；
Time-domain and frequency-domain conversion module 04, for key signal time domain sampled data to be converted into key signal frequency domain data；
Main shaft throw signal time domain sampled data is converted into main shaft throw signal frequency domain data；
Phase calculation module 06, the corresponding phase of frequency component is turned for according to key signal frequency domain data, calculating key signal
Position；According to main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；
Unbalance phase determining module 08, for turning the corresponding phase of frequency component and main shaft throw signal according to key signal
Turn the corresponding phase of frequency component, determine rotary machine rotor unbalance phase.
In one embodiment, acquisition module specifically for：According to rotating machinery generating unit speed, rotary machine rotor is chosen
Integral multiple swing circle key signal time domain sampled data and main shaft throw signal time domain sampled data.
In one embodiment, acquisition module specifically for：According to rotating machinery generating unit speed, rotary machine rotor is chosen
8 to 10 swing circles key signal time domain sampled data and main shaft throw signal time domain sampled data.
In one embodiment, said apparatus also includes：Key signal pretreatment module, for being adopted to key signal time domain
Sample data are pre-processed, and obtain pretreated key signal time domain sampled data；
Time-domain and frequency-domain conversion module specifically for：
FFT is carried out to pretreated key signal time domain sampled data, pretreated key is believed
Number time domain sampled data is converted to key signal frequency domain data；
Fast Fourier Transform (FFT) is carried out to main shaft throw signal time domain sampled data, by main shaft throw signal time-domain sampling number
According to being converted to main shaft throw signal frequency domain data.
In one embodiment, key signal pretreatment module specifically for：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, pre- place is obtained
Key signal time domain sampled data after reason.
Technical scheme provided in an embodiment of the present invention can reach following advantageous effects：Injustice can accurately be obtained
The phase for the quality that weighs, simplifies calculating process, so as to reduce dynamic balance weight number of times and obtain good dynamic balance weight effect
Really.
Obviously, those skilled in the art should be understood that each module or each step of the above-mentioned embodiment of the present invention can be with
Realized with general computing device, they can be concentrated on single computing device, or be distributed in multiple computing devices
On the network constituted, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to by it
Store and performed in the storage device by computing device, and in some cases, can be to be held different from order herein
They, are either fabricated to each integrated circuit modules or will be multiple in them by the shown or described step of row respectively
Module or step are fabricated to single integrated circuit module to realize.So, the embodiment of the present invention is not restricted to any specific hard
Part and software are combined.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (10)
1. a kind of method for determining rotary machine rotor unbalance phase, it is characterised in that including：
Obtain the key signal time domain sampled data and main shaft throw signal time domain sampled data of rotary machine rotor；
The key signal time domain sampled data is converted into key signal frequency domain data；The main shaft throw signal time domain is adopted
Sample data conversion is main shaft displacement signal frequency domain data；
According to the key signal frequency domain data, calculate key signal and turn the corresponding phase of frequency component；According to the main shaft throw
Signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；
The corresponding phase of frequency component and main shaft throw signal are turned according to key signal and turn the corresponding phase of frequency component, whirler is determined
Tool rotor unbalance phase.
2. the method for rotary machine rotor unbalance phase is determined as claimed in claim 1, it is characterised in that obtain whirler
The key signal time domain sampled data and main shaft throw signal time domain sampled data of tool rotor, including：
According to rotating machinery generating unit speed, the key signal time-domain sampling number of the integral multiple swing circle of rotary machine rotor is chosen
According to main shaft throw signal time domain sampled data.
3. the method for rotary machine rotor unbalance phase is determined as claimed in claim 2, it is characterised in that according to whirler
Tool generating unit speed, chooses the key signal time domain sampled data and main shaft throw letter of the integral multiple swing circle of rotary machine rotor
Number time domain sampled data, including：
According to rotating machinery generating unit speed, the key signal time-domain sampling of 8 to 10 swing circles of rotary machine rotor is chosen
Data and main shaft throw signal time domain sampled data.
4. the method for rotary machine rotor unbalance phase is determined as claimed in claim 1, it is characterised in that obtain whirler
After the key signal time domain sampled data and main shaft throw signal time domain sampled data of tool rotor, in addition to：
The key signal time domain sampled data is pre-processed, pretreated key signal time domain sampled data is obtained；
The key signal time domain sampled data is converted into key signal frequency domain data, including：
FFT is carried out to pretreated key signal time domain sampled data, during by pretreated key signal
Domain sampled data is converted to key signal frequency domain data.
5. the method for rotary machine rotor unbalance phase is determined as claimed in claim 4, it is characterised in that to the key phase
Signal time domain sampled data is pre-processed, and obtains pretreated key signal time domain sampled data, including：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, is obtained after pretreatment
Key signal time domain sampled data.
6. a kind of device for determining rotary machine rotor unbalance phase, it is characterised in that including：
Acquisition module, key signal time domain sampled data and main shaft throw signal time-domain sampling for obtaining rotary machine rotor
Data；
Time-domain and frequency-domain conversion module, for the key signal time domain sampled data to be converted into key signal frequency domain data；Will
The main shaft throw signal time domain sampled data is converted to main shaft throw signal frequency domain data；
Phase calculation module, the corresponding phase of frequency component is turned for according to the key signal frequency domain data, calculating key signal；
According to the main shaft throw signal frequency domain data, calculate main shaft throw signal and turn the corresponding phase of frequency component；
Unbalance phase determining module, frequency division is turned for turning the corresponding phase of frequency component and main shaft throw signal according to key signal
Corresponding phase is measured, rotary machine rotor unbalance phase is determined.
7. the device of rotary machine rotor unbalance phase is determined as claimed in claim 6, it is characterised in that the acquisition mould
Block specifically for：
According to rotating machinery generating unit speed, the key signal time-domain sampling number of the integral multiple swing circle of rotary machine rotor is chosen
According to main shaft throw signal time domain sampled data.
8. the device of rotary machine rotor unbalance phase is determined as claimed in claim 7, it is characterised in that the acquisition mould
Block specifically for：
According to rotating machinery generating unit speed, the key signal time-domain sampling of 8 to 10 swing circles of rotary machine rotor is chosen
Data and main shaft throw signal time domain sampled data.
9. the device of rotary machine rotor unbalance phase is determined as claimed in claim 6, it is characterised in that also included：
Key signal pretreatment module, for being pre-processed to the key signal time domain sampled data, is obtained after pretreatment
Key signal time domain sampled data；
The time-domain and frequency-domain conversion module specifically for：
FFT is carried out to pretreated key signal time domain sampled data, during by pretreated key signal
Domain sampled data is converted to key signal frequency domain data；
Fast Fourier Transform (FFT) is carried out to the main shaft throw signal time domain sampled data, by main shaft throw signal time-domain sampling number
According to being converted to main shaft throw signal frequency domain data.
10. the device of rotary machine rotor unbalance phase is determined as claimed in claim 9, it is characterised in that the key phase
Signal pre-processing module specifically for：
A threshold value is chosen, zero is set to the sampled data in key signal time domain sampled data less than threshold value, is obtained after pretreatment
Key signal time domain sampled data.
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