CN108572074A - Detection method and device, the wind power generating set of bearing fault - Google Patents
Detection method and device, the wind power generating set of bearing fault Download PDFInfo
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- CN108572074A CN108572074A CN201710141815.5A CN201710141815A CN108572074A CN 108572074 A CN108572074 A CN 108572074A CN 201710141815 A CN201710141815 A CN 201710141815A CN 108572074 A CN108572074 A CN 108572074A
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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
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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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
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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Abstract
The embodiment of the present invention provides a kind of detection method and device of bearing fault, wind power generating set, wherein method includes the axial period of the Damage coefficient and the physical axis mating with bearing according to bearing, construct the axial period of imaginary axis, according to the axial period of imaginary axis, the synchronously sampled data of physical axis is converted into the synchronously sampled data of imaginary axis；Average treatment is synchronized to the synchronously sampled data of imaginary axis, axial period of the damage response of bearing under imaginary axis is obtained and synchronizes damage response data；Damage response data are synchronized according to axial period of the damage response of bearing under imaginary axis, fault detect is carried out to bearing.The technical solution of the embodiment of the present invention, it realizes to bearing, the bearing under bearing or the special method of operation especially under specific condition, axial period is accurately and easily obtained from various parts response datas synchronizes damage response data, the testing result of bearing fault is set to achieve the desired results, reliability is higher.
Description
Technical field
The present embodiments relate to the detection method of field of machinery non-destructive testing more particularly to a kind of bearing fault and
Device, wind power generating set.
Background technology
Bearing is the part of a support shaft, it can also be born the part to dally on axis, be with the rotation of leading axle
The important part of mechanical equipment is constituted, in the environment of long time continuous working, bearing is easy to damage heavy mechanical equipment, such as
It cannot timely and effectively be repaired, then can make equipment that can not run, heavy losses are brought to production.
Under normal conditions, it when detecting bearing fault, needs to be based on following hypothesis：1, bearing rotary after damaging generation
When, damage location just generates a series of shock response by force area；2, the rotary speed of axis is sufficiently fast, those shock pulses
It is very narrow, so forming broadband excitation；3, the high frequency modal response of broadband excitation excitation bearing support system；4, in those high frequency moulds
The high-order harmonic wave of state frequency range, rotary system working frequency is fully decayed, therefore high frequency modal response can use high-pass filtering
Or bandpass filtering separation.
Fig. 1 is bearing geometrical relationship schematic diagram, under the conditions of based on above-mentioned hypothesis, in conjunction with acceleration envelope line analysis skill
The detection method of art, bearing fault can be with bearing geometrical relationship schematic diagram according to figure 1, according to following formula to bearing phase
Damage characteristic frequency is closed to be detected：
Ball or roller damage characteristic frequency:
Bearing inner race damage characteristic frequency:
Bearing outer ring damage characteristic frequency:
Bearing retainer damage characteristic frequency:
Wherein, D is ball or the pitch diameter of set of rollers；D is ball or roller diameter；α is that (nominal contacts contact angle
Angle)；N is ball or roller number；fMainIt is the rotating speed of axis, unit hertz Hz.fRE, fBPFI,fBPFO, fFTFIt is bearing ball respectively
Or roller, inner ring, outer ring and retainer damage characteristic frequency.
But the damage of not all bearing and service condition can meet it is above-mentioned it is assumed that for example, low speed operation axis
It holds, the main shaft bearing etc. of wind power turbine machine.For the bearing of low speed operation, since the speed of service is low, damage of the bearing causes
Shock pulse be narrow frequency, excitation structure resonant frequency may with the operation of rotating machinery respond mix, lead
Cause can not detach damage of the bearing response signal with simple filter.And for the main shaft bearing of wind power turbine machine
At runtime, the method for operation is different from conventional bearing operation, specifically, main under the gravity pressure of impeller and gear-box
The ball or roller of axle bearing lower half are in loaded state, and ball or roller in the first half are in unloaded state, main
The ball of loaded state or roller are run in a manner of pure rolling when axis rotates, and ball or roller in unloaded state then may
It is run, no matter can all be drawn since rotary inertia is mutated from pure rolling to translation or from translation to pure rolling in a manner of translation
The shock response risen, in actual motion, this response is sometimes main response, and damage of the bearing response signal is due to signal-to-noise ratio is small
It is difficult to get.
Therefore, for the bearing under specific condition or the bearing under the special method of operation, the inspection of conventional bearing fault
Survey method causes the testing result of bearing fault to be difficult since damage of the bearing response signal obtains inaccuracy, the factors such as inconvenience
It achieves the desired results, reliability is relatively low.
Invention content
The embodiment of the present invention provides a kind of detection method and device of bearing fault, wind power generating set, realizes to axis
It holds, especially the bearing under specific condition or the bearing under the special method of operation, is accurately and easily responded from various parts
Axial period of the damage of the bearing response under imaginary axis is obtained in data and synchronizes damage response data, makes the testing result of bearing fault
It can achieve the desired results, reliability is higher.
The embodiment of the present invention provides a kind of detection method of bearing fault, including：
According to the axial period of the Damage coefficient of bearing and the physical axis mating with the bearing, the imaginary axis of construction is determined
Axial period, the physical axis is the axis being connected directly with the bearing；
According to the axial period of the imaginary axis, the synchronously sampled data of the physical axis is converted into the same of the imaginary axis
Walk sampled data；
Average treatment is synchronized to the synchronously sampled data of the imaginary axis, obtains the damage response of the bearing in institute
The axial period stated under imaginary axis synchronizes damage response data；
Damage response data are synchronized according to axial period of the damage response of the bearing under the imaginary axis, to the axis
Hold carry out fault detect.
The embodiment of the present invention also provides a kind of detection device of bearing fault, including：
Determining module is used for according to the Damage coefficient of bearing and the axial period of the physical axis mating with the bearing, really
Surely the axial period of the imaginary axis constructed, the physical axis are the axis being connected directly with the bearing；
The synchronously sampled data of the physical axis is converted by conversion module for the axial period according to the imaginary axis
The synchronously sampled data of the imaginary axis；
First processing module synchronizes average treatment for the synchronously sampled data to the imaginary axis, obtains described
Axial period of the damage of the bearing response under the imaginary axis synchronizes damage response data；
Detection module, for synchronizing damage response according to axial period of the damage response of the bearing under the imaginary axis
Data carry out fault detect to the bearing.
The embodiment of the present invention also provides a kind of wind power generating set, including generator and the speed change that is connect with the generator
Case, the wind power generating set further include：Device as described above, to carry out failure inspection to the bearing in the gearbox
It surveys.
Detection method and device, the wind power generating set of the bearing fault of the embodiment of the present invention, pass through the damage according to bearing
Hinder coefficient and the axial period of the physical axis mating with the bearing, constructs the axial period of imaginary axis, and according to the axis of imaginary axis
Period, after the synchronously sampled data of physical axis is converted into the synchronously sampled data of imaginary axis, to the synchronized sampling of imaginary axis
Data synchronize average treatment, obtain axial period of the damage of the bearing response under imaginary axis and synchronize damage response data, then root
Damage response data are synchronized according to the axial period under imaginary axis, fault detect is carried out to bearing, must be swashed after avoiding damage of the bearing
The response data of high band is encouraged, or forms a frequency range without the interference of other response data, bearing fault could be carried out
Detection.The technical solution of the embodiment of the present invention, realize under bearing, especially specific condition bearing or special operation side
Bearing under formula accurately and easily obtains damage of the bearing from various parts response datas and responds the axial period under imaginary axis
Synchronous damage response data, enable the testing result of bearing fault to achieve the desired results, reliability is higher.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes the embodiment of the present invention
The illustrative embodiments and their description of a part, the embodiment of the present invention are not constituted for explaining the embodiment of the present invention to this hair
The improper restriction of bright embodiment."upper" described in text, "lower" are using the placement status in attached drawing as reference.In the accompanying drawings：
Fig. 1 is bearing geometrical relationship schematic diagram；
Fig. 2 is physical axis period region parts response data schematic diagram；
Fig. 3 is that the corresponding orders of Fig. 2 compose schematic diagram；
Fig. 4 is the compares figure of physical axis period region parts response data synchronized averaging before and after the processing；
Fig. 5 is that the corresponding orders of Fig. 4 compose compares figure；
Fig. 6 is the flow chart of the detection method embodiment one of the bearing fault of the embodiment of the present invention；
Fig. 7 is the flow chart of the detection method embodiment two of the bearing fault of the embodiment of the present invention；
Fig. 8 is the flow chart of the detection method embodiment three of the bearing fault of the embodiment of the present invention；
Fig. 9 is that treated that result is shown for synchronized averaging in imaginary axis period region for Fig. 2 axis bearing outer-ring damage response data
It is intended to；
Figure 10 is that the obtained results of Fig. 9 are transformed into compareing for the response data after physical axis period region and original response data
Figure；
Figure 11 is that the corresponding orders of Figure 10 compose compares figure；
Figure 12 is the bearing inner race damage response data compares figure of synchronized averaging before and after the processing in imaginary axis period region；
Figure 13 is that the corresponding orders of Figure 12 compose compares figure；
Figure 14 is the compares figure that white noise is added in Fig. 2；
Figure 15 is that the corresponding orders of Figure 14 compose schematic diagram；
Figure 16 is the bearing outer ring damage response data order spectrum pair of synchronized averaging before and after the processing in imaginary axis period region
According to figure；
Figure 17 is the bearing inner race damage response data order spectrum pair of synchronized averaging before and after the processing in imaginary axis period region
According to figure；
Figure 18 is the structural schematic diagram of the detection device embodiment one of the bearing fault of the embodiment of the present invention；
Figure 19 is the structural schematic diagram of the detection device embodiment two of the bearing fault of the embodiment of the present invention；
Figure 20 is the structural schematic diagram of the detection device embodiment three of the bearing fault of the embodiment of the present invention；
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Technical solution of the embodiment of the present invention is clearly and completely described in specific embodiment and corresponding attached drawing.Obviously, described
Embodiment is only a part of the embodiment of the embodiment of the present invention, instead of all the embodiments.Based on the reality in the embodiment of the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the range of protection of the embodiment of the present invention.
Below in conjunction with attached drawing, the technical solution of each embodiment offer of embodiment that the present invention will be described in detail.
In order to enable those of ordinary skill in the art to be better understood from the technical solution of the embodiment of the present invention, below
To the bearing under specific condition or the bearing under the special method of operation, using the detection method of conventional bearing fault, to axis
Defect when carrying out fault detect is held to be described.
Fig. 2 is physical axis period region parts response data schematic diagram, and Fig. 3 is that the corresponding orders of Fig. 2 compose schematic diagram.Such as figure
Shown in 2, collected parts response data may include but be not limited to the dynamic response data of shaft rotation, bearing inner race damage is rung
Answer data and its damage response data of high-order harmonic wave, bearing outer ring damage response data and its high-order harmonic wave, ball or roller
And its damage data and its high-order harmonic wave and gear the engagement response data and its high-order of high-order harmonic wave, bearing retainer are humorous
Wave, and the parts response data acquired is converted into the synchronously sampled data of physical axis period region.
As shown in figure 3, f0=1 indicates the axle speed of the physical axis, f11=8.07 indicate and the mating bearing of the physical axis
Response data caused by the damage of outer ring, f12And f13It is f11The the 2nd and the 3rd order harmonics；f21=17.93 indicate the inner ring damage of bearing
Hinder response data, f22And f23It is f21The the 2nd and the 3rd order harmonics；f3-f6Indicate the gear response data that is connected with the physical axis and
High-order harmonic wave, respectively 15,30,40 and 45.
From the foregoing, it will be observed that f11And f21And its frequency multiplication is non-integer, that is to say, that these response datas are non-same with physical axis
Step；And f0And f3-f6It is then integer, therefore these response datas are synchronous with physical axis.If we are directly according to object
These data are synchronized average treatment, those are nonsynchronous with physical axis by the axial period for managing axis using synchronized averaging technology
Damage of the bearing response data, which will reduce, even to disappear, and those response datas synchronous with physical axis can then be kept, and reinforces.
Specifically, Fig. 4 is the compares figure of physical axis period region parts response data synchronized averaging before and after the processing, and Fig. 5 is
The corresponding orders of Fig. 4 compose compares figure.As shown in figure 4, top is the physical axis period region parts response before synchronized averaging processing
Data, lower part is synchronized averaging treated the response data synchronouss with physical axis, before the middle and upper parts Fig. 5 are handled for synchronized averaging
The order of physical axis period region parts response data is composed, and lower part is synchronized averaging treated the number of responses synchronous with physical axis
According to order spectrum.
As shown in Figure 4 and Figure 5, being synchronized in physical axis period region will be with the nonsynchronous axis of physical axis after average treatment
Holding damage sound data should substantially eliminate, and other response datas synchronous with physical axis are kept essentially constant.
By Fig. 1 and formula (1)-(4) it is found that the damage characteristic frequency of each component of bearing and the mating physical axis of the bearing
Rotating speed and the bearing itself structure it is related.The embodiment of the present invention is for the convenience of description, can convert formula (1)-(4)
For following formula：
Damage of the bearing feature order (rotating speed of damage of the bearing characteristic frequency/physical axis) can be defined as the damage of bearing
Coefficient M, wherein MREFor the Damage coefficient of ball or roller, MBPFIFor the Damage coefficient of bearing inner race, MBPFOFor bearing outer ring
Damage coefficient, MFTFFor the Damage coefficient of bearing retainer, it should be noted that the damage system of the bearing in the embodiment of the present invention
Number M can be understood as the axle speed of ball or roller, bearing inner race, bearing outer ring and bearing retainer relative to physical axis
Order.
Since bearing self structure is fixed, so its geometrical relationship is fixed, therefore the Damage coefficient of bearing is fixed
Justice is a fixed value for M, but is not an integer value, it is generally the case that MRE、MBPFIAnd MBPFOIt is the number more than 1
Value, and MFTFNumerical value 0.5 or so, that is to say, that in the axial period domain synchronously sampled data of physical axis, damage of the bearing response
Data are non-integer-period sampled.Therefore, directly with based on fast Fourier transform (Fast Fourier Transformation,
FFT order analysis) just inevitably causes energy leakage in the amplitude of damage of the bearing response data, so as to cause axis
The reading of the order and amplitude that hold damage response data is inaccurate.The data in the axial period domain of this inaccurate degree and physical axis are rung
Answer length related with resolution ratio.
As shown in figure 3, bearing outer ring damage response digital simulation order [8.07,16.14,24.21] and amplitude
[2.0,1.0,0.5], but directly the value read of fft analysis be respectively order [8.125,16.125,24.25] and amplitude [1.43,
0.941、0.4205].Here bearing outer ring damage response data length is 8 weeks, so order resolution ratio is 0.125.Compare knowledge
The amplitude of other amplitude and simulation has up to 16% error, and this is mainly due to non-integer-period sampled energy leakages to cause
's.Equally, also there is similar result in the simulation of bearing inner race damage response.Bearing inner race damage response digital simulation is used
Order [17.93,35.86,53.79] and amplitude [2.0,1.0,0.5], but the value that directly fft analysis is read is respectively order
[17.93,35.86,53.79] and amplitude [1.44,0.98,0.42], amplitude error is also 16% or so.
In conclusion for the bearing under specific condition or the bearing under the special method of operation, conventional bearing fault
Detection method, bearing damage response data can not be reinforced, even weaken damage of the bearing response data, lead to bearing therefore
The testing result of barrier is extremely difficult to desired effect, and error is larger, reliability is relatively low.
Embodiment one
Fig. 6 is the flow chart of the detection method embodiment one of the bearing fault of the embodiment of the present invention, as shown in fig. 6, this hair
The detection method of the bearing fault of bright embodiment, can specifically include following steps：
600, according to the axial period of the Damage coefficient of bearing and the physical axis mating with bearing, the imaginary axis of construction is determined
Axial period.
During specific implementation at one, for the bearing of low speed operation, since the speed of service is low, caused by damage of the bearing
Shock pulse is narrow frequency, and the structure resonant frequency of excitation may be responded with the operation of rotating machinery to be mixed, if right
When the synchronously sampled data of physical axis synchronizes average treatment, damage of the bearing response data can be weakened and even be eliminated, and cause
Damage of the bearing response data can not be detached with simple filter；And exist for the main shaft bearing of wind power turbine machine
When operation, the method for operation is different from conventional bearing operation, and no matter ball or roller are from pure rolling to being translatable or from translation
Shock response caused by being all mutated to pure rolling due to rotary inertia, in actual motion, this response is sometimes main
Response, damage of the bearing response data are difficult to get.
Therefore, in order to effectively obtain damage of the bearing response data, the embodiment of the present invention can be assumed that there are one
Imaginary axis, for the imaginary axis without physical significance, the purpose is to keep the damage corresponding data of bearing synchronous with the axial period of imaginary axis.Example
Such as, the imaginary axis of construction according to the Damage coefficient M of bearing and the axial period of the physical axis mating with the bearing, can be determined
Axial period.Keep damage of the bearing response data synchronous with the axial period of imaginary axis, other response datas then with the axial period of imaginary axis
It is asynchronous, to retain and reinforce the data of bearing damage response, weaken or remove other response datas, wherein physical axis
For the axis being connected directly with the bearing, the Damage coefficient of bearing is determined according to the geometric parameter of the bearing；According to formula
(5)-(8) are it is found that in the embodiment of the present invention, the geometric parameter of bearing includes：Contact angle, ball or set of rollers pitch diameter,
Ball or roller diameter and ball or roller number.
Specifically, the embodiment of the present invention may be used but be not limited to following when determining the axial period of imaginary axis of construction
Method：The Damage coefficient M of the axial period of physical axis and bearing is divided by, the period of imaginary axis is obtained.If for example, the axis of physical axis
Period is 8, and the Damage coefficient M of bearing is 1.15, and the axial period that can obtain imaginary axis is 6.96, if the Damage coefficient M of bearing
It is 0.48, the axial period that can obtain imaginary axis is 16.67.
601, according to the axial period of imaginary axis, the synchronously sampled data of physical axis is converted into the synchronized sampling number of imaginary axis
According to.
Since the synchronously sampled data of physical axis is to synchronize sampling according to the axial period of physical axis, and M is usually
Non-integer, to which the synchronously sampled data middle (center) bearing response data of physical axis is non-integer, it is possible to according to the axis of imaginary axis
The synchronously sampled data of physical axis is converted into the synchronously sampled data of imaginary axis by the period, for example, can be to about physical axis
Synchronously sampled data carries out resampling so that the points of the response data after resampling in the virtual bearing period are integer.
It should be noted that when carrying out resampling according to the axial period of imaginary axis, it is necessary to assure imaginary axis is adopted complete cycle
Sample has integer sampled point in virtual axial period.
602, average treatment is synchronized to the synchronously sampled data of imaginary axis, obtains damage of the bearing response under imaginary axis
Axial period synchronize damage response data.
Average treatment is synchronized to the synchronously sampled data of imaginary axis using synchronized averaging technology, due to imaginary axis at this time
Synchronously sampled data middle (center) bearing response data and imaginary axis cycle synchronisation, and period of other response datas and imaginary axis
It is asynchronous, so after the synchronously sampled data to imaginary axis synchronizes average treatment, damage of the bearing response can be obtained
Axial period under imaginary axis synchronizes damage response data, and axial period of the damage of the bearing response under imaginary axis is made to synchronize damage
Response data is reinforced, while weakening or removing the nonsynchronous other response datas of axial period with imaginary axis.
603, the axial period according to the damage response of bearing under imaginary axis synchronizes damage response data, and event is carried out to bearing
Barrier detection.
After the processing of above steps, axial period can be synchronized response of the damage response data from each parts
It is separated in data, damage response data can be synchronized to the axial period under imaginary axis at this time and carry out time domain or frequency domain point
Analysis, to which according to analysis result, fault detect is carried out to bearing.
The detection method of the bearing fault of the embodiment of the present invention, by according to the Damage coefficient of bearing and with the bearing
The axial period of mating physical axis constructs the axial period of imaginary axis, and according to the axial period of imaginary axis, synchronizing for physical axis is adopted
After sample data conversion is at the synchronously sampled data of imaginary axis, average treatment is synchronized to the synchronously sampled data of imaginary axis,
It obtains axial period of the damage of the bearing response under imaginary axis and synchronizes damage response data, synchronized further according to the axial period under imaginary axis
Damage response data carry out fault detect to bearing, avoid the response data that high band must be encouraged after damage of the bearing, or
A frequency range without the interference of other response data is formed, bearing fault could be detected.The technology of the embodiment of the present invention
Scheme is realized to the bearing under bearing, especially specific condition or the bearing under the special method of operation, accurately and easily from
Axial period of the damage of the bearing response under imaginary axis is obtained in various parts response datas and synchronizes damage response data, makes bearing
The testing result of failure can achieve the desired results, and reliability is higher.
Embodiment two
Fig. 7 is the flow chart of the detection method embodiment two of the bearing fault of the embodiment of the present invention, as shown in fig. 7, this hair
The detection method of the bearing fault of bright embodiment, it is further more detailed to the present invention on the basis of embodiment shown in Fig. 6
Technical solution is described.
As shown in fig. 7, the detection method of the bearing fault of the embodiment of the present invention, can specifically include following steps：
700, according to the axial period of the Damage coefficient of bearing and the physical axis mating with bearing, the imaginary axis of construction is determined
Axial period.
701, the shaft speed signal of parts response signal and physical axis is acquired.
It is, for example, possible to use sensor acquires parts response response signal, the sensor in the embodiment of the present invention can be with
Including but not limited to：Acceleration transducer, foil gauge, film or chip based on piezoelectric effect.The embodiment of the present invention can be with
By but be not limited to：Mode based on light-sensitive element, based on laser or based on Hall effect acquires the axle speed letter of physical axis
Number.
It should be noted that the shaft speed signal of physical axis can also be acquired in other forms, for example, multiple weekly
The time series of pulse or precise time etc. weekly, the embodiment of the present invention is not particularly limited.
Parts response signal in the embodiment of the present invention may include but be not limited to：The dynamic response signal of shaft rotation, axis
Hold inner ring damage response signal and its high-order harmonic wave, bearing outer ring damage response signal and its high-order harmonic wave, ball or roller
Damage response signal and its high-order harmonic wave, the damage signal of bearing retainer and its high-order harmonic wave and gear engage response signal
And its at least one of high-order harmonic wave.
702, according to the shaft speed signal of parts response signal and physical axis, parts response signal corresponding zero is generated
The axle speed degrees of data of the corresponding physical axis of the shaft speed signal of unit response data and physical axis.
It is preferably analog-to-digital conversion in the embodiment of the present invention, precision is not less than 16.When the shaft speed signal of physical axis is
With time complete cycle come when providing, the accurate initial time for proofreading physical axis rotation is critically important.
It is zero corresponding can to obtain each signal after analog-to-digital conversion for parts response signal in the embodiment of the present invention
Part response data.For example, response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring that shaft rotation is moved damage
Hinder the damage of response data and its high-order harmonic wave, the damage response data of ball or roller and its high-order harmonic wave, bearing retainer
Data and its high-order harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
It should be noted that the shaft speed signal of parts response signal and physical axis signified in the embodiment of the present invention is equal
For analog signal, synchronously sampled data is digital signal.
703, according to the axial period of physical axis, processing is synchronized to parts response data, obtains the synchronization of physical axis
Sampled data.
To eliminate the rotation speed change of physical axis and subsequent synchronisation analysis in gatherer process, the axis week according to physical axis is needed
Phase synchronizes processing to parts response data, obtains the synchronously sampled data of physical axis.
Have it should be noted that the embodiment of the present invention does not do the sequencing between step 700 and step 701-703
Body limits.
704, according to the axial period of imaginary axis, the synchronously sampled data of physical axis is converted into the synchronized sampling number of imaginary axis
According to.
705, average treatment is synchronized to the synchronously sampled data of imaginary axis, obtains damage of the bearing response under imaginary axis
Axial period synchronize damage response data.
706, according to the axial period of physical axis, axial period of the damage of the bearing response under imaginary axis is synchronized into damage response number
According to the bearing response data being converted under physical axis.
Since imaginary axis is the axis of a hypothesis, rather than physical presence, and without physical significance, so, obtaining axis
After holding the axial period synchronization damage response data under imaginary axis, in order to be synchronized to axial period of the bearing under imaginary axis
The analysis result of damage response data assigns physical significance, and the axial period by bearing under imaginary axis is needed to synchronize damage response number
According to the bearing response data being converted under physical axis, it is to learn that axial period of the bearing under imaginary axis synchronizes damage response data
The response data of any part.
Specifically, it can be converted according to the reverse procedure of step 704 according to the geometrical relationship of bearing, i.e., it will be virtual
The axial period of axis is multiplied by Damage coefficient M, obtains the axial period of physical axis, carries out resampling according still further to the period of physical axis, at this time
Obtained response data is the bearing response data under physical axis.
707, the bearing response signal under physical axis is analyzed, obtains analysis result.
After the bearing response data under obtaining physical axis, the bearing response data under physical axis can be carried out axis week
Phase domain analysis carries out fft analysis, obtains analysis result.
708, according to analysis result, fault detect is carried out to bearing.
After obtaining analysis result, it can utilize whether the analysis result, detection bearing break down, event occurs for bearing
Position, damage of the bearing degree of barrier etc..
The detection method of the bearing fault of the embodiment of the present invention avoids the response that high band must be encouraged after damage of the bearing
Data, or a frequency range without the interference of other response data is formed, bearing fault could be detected.The present invention is implemented
The technical solution of example, realizes to the bearing under bearing, especially specific condition or the bearing under the special method of operation, accurately
Axial period of the damage of the bearing response under imaginary axis is easily obtained from various parts response datas synchronizes damage response number
According to enabling the testing result of bearing fault to achieve the desired results, reliability is higher.
Embodiment three
Fig. 8 is the flow chart of the detection method embodiment three of the bearing fault of the embodiment of the present invention, as shown in figure 8, this hair
The detection method of the bearing fault of bright embodiment, it is further more detailed to the present invention on the basis of embodiment shown in Fig. 6
Technical solution is described.
800, according to the axial period of the Damage coefficient of bearing and the physical axis mating with bearing, the imaginary axis of construction is determined
Axial period.
801, the shaft speed signal of parts response signal and known axes is acquired.
It is known that axis is the axis that can directly measure axle speed.
During specific implementation at one, the shaft speed signal for the physical axis being directly connected to bearing to be measured is possible can not
It is directly measured, for example, in a typical wind turbine generator gear-box, usually there is multistage gear and different gears
Pattern, such as parallel gears or planetary gear, to realize powerful rotating speed speedup.And the axle speed that can be directly measured
Signal is spent, usually high speed shaft, the shaft speed signal of other axis can not be obtained by measuring.
If it is to be directly connected to other axis to need the bearing detected at this time, illustrate that physical axis is other other than high speed shaft
Axis, shaft speed signal can not be measured directly, therefore, height can be measured using high speed shaft as known axes in the embodiment of the present invention
The shaft speed signal of fast axis, rather than measure the shaft speed signal of physical axis.Detailed gatherer process and principle are implemented with shown in Fig. 7
Middle step 701 is identical, please refers to above-mentioned related record in detail, details are not described herein.
802, according to the shaft speed signal of parts response signal and known axes, parts response signal corresponding zero is generated
The axle speed degrees of data of the corresponding known axes of the shaft speed signal of unit response data and known axes.
Detailed gatherer process and principle are identical as step 702 in implementation shown in Fig. 7, please refer to above-mentioned related record in detail,
Details are not described herein.
803, according to the axial period of physical axis, known axes axle speed degrees of data and known axes and physical axis between kinematics
Parts response data is converted into the synchronously sampled data of physical axis by relationship.
Since the kinematic relation between not coaxial is constant, for example, as it is known that axle speed variation, known axes and the object of axis
The axis informations such as the geometrical relationship between reason axis, the rotating ratio between known axes and physical axis can be learned, therefore, can
With the kinematic relation between the axle speed degrees of data and known axes and physical axis according to known axes, at synthesis rotating speed and signal
Reason technology realizes parts response data and physics by the axle speed data conversion of known axes at the axle speed degrees of data of physical axis
Axis is associated, and according to the axial period of physical axis, the vibration data of component is converted into the synchronously sampled data of physical axis.
Have it should be noted that the embodiment of the present invention does not do the sequencing between step 800 and step 801-803
Body limits.
804, according to the axial period of imaginary axis, the synchronously sampled data of physical axis is converted into the synchronized sampling number of imaginary axis
According to.
805, average treatment is synchronized to the synchronously sampled data of imaginary axis, obtains damage of the bearing response under imaginary axis
Axial period synchronize damage response data.
806, according to the axial period of physical axis, axial period of the damage of the bearing response under imaginary axis is synchronized into damage response number
According to the bearing response data being converted under physical axis.
807, the bearing response signal under physical axis is analyzed, obtains analysis result.
808, according to analysis result, fault detect is carried out to bearing.
The detection method of the bearing fault of the embodiment of the present invention, by the kinematic relation between known axes and physical axis,
The synchronously sampled data that any physical axis can be obtained avoids the response data that high band must be encouraged after damage of the bearing, or
Person forms a frequency range without the interference of other response data, could be detected to bearing fault.The skill of the embodiment of the present invention
Art scheme is realized to the bearing under bearing, especially specific condition or the bearing under the special method of operation, accurately and easily
Axial period of the damage of the bearing response under imaginary axis is obtained from various parts response datas and synchronizes damage response data, makes axis
Holding the testing result of failure can achieve the desired results, and reliability is higher.
The technical solution of the embodiment of the present invention is described with specific numerical simulation example below.
Example 1
Fig. 9 is that treated that result is shown for synchronized averaging in imaginary axis period region for Fig. 2 axis bearing outer-ring damage response data
It is intended to, Figure 10 is the compares figure that the result that Fig. 9 is obtained is transformed into response data and original response data after physical axis period region,
Figure 11 is that the corresponding orders of Figure 10 compose compares figure.
As shown in Figure 10, the middle and upper parts Figure 10 are original response data, and lower part is the bearing outer ring damage response number that Fig. 9 is obtained
According to being transformed into the response data after physical axis period region, after the two compares, it can be seen that bearing outer ring damage response data
Except other data be cleaned.As shown in figure 11, top is the order spectrum of original response data in Figure 10, lower part Figure 10
Axis bearing outer-ring damage response data are transformed into the order spectrum of the response data after physical axis period region, after the two compares,
It can be clearly seen that：Bearing outer ring damage response data (imaginary axis sync response data) are enhanced；Bearing inner race damages
Hinder response data and gear fitting data etc. (the asynchronous response data of imaginary axis) to be inhibited.
Similarly, to the processing of bearing inner race damage response data, can also obtain it is similar as a result, referring particularly to Figure 12 and
Figure 13, Figure 12 are bearing inner race damage response the data compares figure of synchronized averaging before and after the processing, Figure 13 in imaginary axis period region
Compares figure is composed for the corresponding orders of Figure 12.As shown in figure 12, top is the original response data before synchronized averaging processing, and lower part is
Bearing inner race damage response data in imaginary axis period region at synchronized averaging after, and be transformed into the sound after physical axis period region
Answer data.
The numerical value shown in Figure 10-Figure 13 is known that：
1, the detection method of the bearing fault of the embodiment of the present invention synchronizes the synchronously sampled data of imaginary axis average
Processing, can play the role of release bearing damage response data, and reinforce bearing damage response data simultaneously, reduce and even go
Except other response datas.
2, the detection method of the bearing fault of the embodiment of the present invention synchronizes the synchronously sampled data of imaginary axis average
Processing, can not only improve the amplitude of damage of the bearing characteristic frequency, can also improve the reading of damage of the bearing characteristic frequency and order
Number precision.
Similarly, to the processing of the response data of the other components of bearing, similar results can also be obtained, no longer one at one stroke herein
Example explanation.
As shown in figure 11, in the simulation of bearing outer ring damage response data, the axis analyzed with imaginary axis synchronized averaging
The order and amplitude of bearing outer-ring damage characteristic frequency are respectively [8.07,16.14,24.21] and [2.0,1.006,0.4997].This
In order reading be accurate, and amplitude error is within 1%.
Equally, as shown in figure 13, similar result is also obtained to the simulation of bearing inner race damage response data.Use imaginary axis
The bearing inner race damage characteristic frequency that Synchronization Analysis obtains be order [17.93,35.86,53.79] and amplitude [2.07,
0.9994、0.5004].Equally, order identification is accurate, and amplitude identification error is less than 4%.
Example 2
Figure 14 is the compares figure that white noise is added in Fig. 2, and Figure 15 is that the corresponding orders of Figure 14 compose schematic diagram, and Figure 16 is outside bearing
It encloses the damage response data order of synchronized averaging before and after the processing in imaginary axis period region and composes compares figure, Figure 17 damages for bearing inner race
Hinder the response data order spectrum compares figure of synchronized averaging before and after the processing in imaginary axis period region.
The numerical value shown in Figure 14-Figure 17 it is recognised that the bearing fault of the embodiment of the present invention detection method, to virtual
The synchronously sampled data of axis synchronizes average treatment, moreover it is possible to have stronger Noise Reduction.
Specifically, as shown in figure 14, figure middle and upper part is vibratory response data shown in Fig. 2, and middle part is white noise data,
Variance intensity is 10 times of vibratory response data variance shown in Fig. 2, i.e.,In such Gao Bai
Under noise jamming, some vibratory response data have been flooded in white noise completely, and lower part is that the vibration after white noise is added is rung
Answer data, as shown in figure 15, f0、f13And f23It has been beyond recognition.As shown in figure 16, top is to be added after white noise in Figure 14
Vibratory response data corresponding order spectrum, the bearing outer ring damage that lower part obtains after being synchronized averaging processing by imaginary axis
The corresponding order spectrum of response data, after the two comparison, it can be seen that after the synchronized averaging processing by imaginary axis, white noise is big
Part is suppressed.For example, bearing outer ring damage response data can detect after the processing of the synchronized averaging of 25 imaginary axis
The amplitude of bearing outer ring damage response data is [1.931,1.105,0.519].
Similarly, as shown in figure 17, top is the corresponding order spectrum of vibratory response data after white noise is added in Figure 14,
Lower part is the corresponding order spectrum of bearing inner race damage response data obtained after the synchronized averaging by imaginary axis is handled, and the two is right
Than later, it can be seen that after the synchronized averaging processing by imaginary axis, white noise is largely suppressed.Axis can be detected at this time
The amplitude for holding inner ring damage response data is [1.934,1.127,0.454].The error of its recognition result is respectively less than 13%, needs
Illustrate, utilizes the detection method of the bearing fault of the embodiment of the present invention, obtained damage of the bearing feature in practical applications
The error of frequency can reduce as synchronized averaging number of processing increases.
Example IV
Figure 18 is the structural schematic diagram of the detection device embodiment one of the bearing fault of the embodiment of the present invention, such as Figure 18 institutes
Show, the detection device of the bearing fault of the embodiment of the present invention may include：Determining module 10, conversion module 11, first handle mould
Block 12 and detection module 13.
Determining module 10, for according to the Damage coefficient of bearing and the axial period of the physical axis mating with bearing, determining
The axial period of the imaginary axis of construction.
During specific implementation at one, physical axis is the axis being connected directly with bearing, and the Damage coefficient of bearing is basis
What the geometric parameter of the bearing determined, wherein the geometric parameter of bearing includes：The pitch circle of contact angle, ball or set of rollers is straight
Diameter, ball or roller diameter and ball or roller number.The embodiment of the present invention is when determining the axial period of imaginary axis of construction
It may be used but be not limited to following methods：The axial period of the physical axis and the Damage coefficient of the bearing are divided by, obtained
The period of imaginary axis.
The synchronously sampled data of physical axis is converted into imaginary axis by conversion module 11 for the axial period according to imaginary axis
Synchronously sampled data.
First processing module 12 synchronizes average treatment for the synchronously sampled data to imaginary axis, obtains the axis
It holds axial period of the damage response under imaginary axis and synchronizes damage response data.
Detection module 13, it is right for synchronizing damage response data according to axial period of the damage of the bearing response under imaginary axis
Bearing carries out fault detect.
The detection device of the bearing fault of the embodiment of the present invention is realized by using above-mentioned each module and is carried out to bearing fault
The realization mechanism of detection is identical as the realization mechanism of above-mentioned embodiment illustrated in fig. 6, can refer to above-mentioned embodiment illustrated in fig. 6 in detail
Record, details are not described herein.
The detection device of the bearing fault of the embodiment of the present invention, can be according to the damage of bearing by using above-mentioned each module
The axial period of coefficient and the physical axis mating with the bearing constructs the axial period of imaginary axis, and according to the axis of imaginary axis week
Phase, after the synchronously sampled data of physical axis is converted into the synchronously sampled data of imaginary axis, to the synchronized sampling number of imaginary axis
According to average treatment is synchronized, obtains axial period of the damage of the bearing response under imaginary axis and synchronize damage response data, further according to
Axial period under imaginary axis synchronizes damage response data, carries out fault detect to bearing, must be encouraged after avoiding damage of the bearing
The response data of high band, or a frequency range without the interference of other response data is formed, bearing fault could be examined
It surveys.The technical solution of the embodiment of the present invention, realize under bearing, especially specific condition bearing or the special method of operation
Under bearing, it is same that axial period of the damage of the bearing response under imaginary axis is accurately and easily obtained from various parts response datas
Damage response data are walked, so that the testing result of bearing fault is achieved the desired results, reliability is higher.
Embodiment five
Figure 19 is the structural schematic diagram of the detection device embodiment two of the bearing fault of the embodiment of the present invention, such as Figure 19 institutes
Show, the detection device of the bearing fault of the embodiment of the present invention can also include further the on the basis of embodiment illustrated in fig. 18
One acquisition module 14, the first generation module 15 and Second processing module 16.
First acquisition module 14, the shaft speed signal for acquiring parts response signal and physical axis；
First generation module 15 generates parts for the shaft speed signal according to parts response signal and physical axis
The axle speed degrees of data of the corresponding physical axis of shaft speed signal of the corresponding parts response data of response signal and physical axis；
Second processing module 16 synchronizes processing to parts response data, obtains for the axial period according to physical axis
To the synchronously sampled data of physical axis；
Wherein, parts response data may include but be not limited to：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response number
According to and its damage response data and its high-order harmonic wave of high-order harmonic wave, ball or roller, the damage data of bearing retainer and its
High-order harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
During specific implementation at one, detection module 13 is specifically used for：
According to the axial period of physical axis, axial period of the damage of the bearing response under imaginary axis is synchronized into damage response data and is turned
Change the bearing response data under physical axis into；
Bearing response data under physical axis is analyzed, analysis result is obtained；
According to analysis result, fault detect is carried out to bearing.
It should be understood that although the description processing modules such as term first, second may be used in embodiments of the present invention,
But these processing modules should not necessarily be limited by these terms, these terms are only used for processing module being distinguished from each other out.Such as it is not taking off
In the case of range of embodiment of the invention, first processing module 12 can also be referred to as Second processing module 16, and similarly second
Processing module 16 can also be referred to as first processing module 12.
The detection device of the bearing fault of the embodiment of the present invention is realized by using above-mentioned each module and is carried out to bearing fault
The realization mechanism of detection is identical as the realization mechanism of above-mentioned embodiment illustrated in fig. 7, can refer to above-mentioned embodiment illustrated in fig. 7 in detail
Record, details are not described herein.
Embodiment six
Figure 20 is the structural schematic diagram of the detection device embodiment three of the bearing fault of the embodiment of the present invention, such as Figure 20 institutes
Show, the detection device of the bearing fault of the embodiment of the present invention can also include further the on the basis of embodiment illustrated in fig. 18
Two acquisition modules 17, the second generation module 18 and third processing module 19.
Second acquisition module 17, the shaft speed signal for acquiring parts response signal and known axes, it is known that axis is energy
Enough axis for directly measuring axle speed；
Second generation module 18 generates parts for the shaft speed signal according to parts response signal and known axes
The axle speed degrees of data of the corresponding known axes of shaft speed signal of the corresponding parts response data of response signal and known axes；
Third processing module 19, for according to the axial period of physical axis, the axle speed degrees of data of known axes and known axes and object
The kinematic relation between axis is managed, parts response data is converted into the synchronously sampled data of physical axis；
Wherein, parts response data may include but be not limited to：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response number
According to and its damage response data and its high-order harmonic wave of high-order harmonic wave, ball or roller, the damage data of bearing retainer and its
High-order harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
The detection device of the bearing fault of the embodiment of the present invention is realized by using above-mentioned each module and is carried out to bearing fault
The realization mechanism of detection is identical as the realization mechanism of above-mentioned embodiment illustrated in fig. 8, can refer to above-mentioned embodiment illustrated in fig. 8 in detail
Record, details are not described herein.
The embodiment of the present invention also provides a kind of wind power generating set, including generator and the gearbox that is connect with generator,
Wind power generating set further includes：The device of embodiment as described in Figure 18-20 is any, to carry out failure to the bearing in gearbox
Detection.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology realizes information storage.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or other magnetic storage apparatus
Or any other non-transmission medium, it can be used for storage and can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Including so that process, method, commodity or equipment including a series of elements include not only those elements, but also wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that wanted including described
There is also other identical elements in the process of element, method, commodity or equipment.
It will be understood by those skilled in the art that the embodiment of the embodiment of the present invention can be provided as method, system or computer journey
Sequence product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware side
The form of the embodiment in face.Moreover, it wherein includes computer available programs that the embodiment of the present invention, which can be used in one or more,
Implement in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of computer program product.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art
For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (13)
1. a kind of detection method of bearing fault, which is characterized in that including：
According to the axial period of the Damage coefficient of bearing and the physical axis mating with the bearing, the axis of the imaginary axis of construction is determined
Period, the physical axis are the axis being connected directly with the bearing；
According to the axial period of the imaginary axis, the synchronously sampled data of the physical axis is converted into synchronizing for the imaginary axis and is adopted
Sample data；
Average treatment is synchronized to the synchronously sampled data of the imaginary axis, obtains the damage response of the bearing in the void
Axial period under quasi- axis synchronizes damage response data；
Synchronize damage response data according to axial period of the damage response of the bearing under the imaginary axis, to the bearing into
Row fault detect.
2. according to the method described in claim 1, it is characterized in that, mating according to the Damage coefficient of bearing and with the bearing
Physical axis axial period, determine construction imaginary axis axial period, including：
The axial period of the physical axis and the Damage coefficient of the bearing are divided by, the period of imaginary axis is obtained.
3. according to the method described in claim 1, it is characterized in that, according to the damage response of the bearing under the imaginary axis
Axial period synchronize damage response data, to the bearing carry out fault detect, including：
According to the axial period of the physical axis, axial period of the damage response of the bearing under the imaginary axis is synchronized into damage
Response data is converted into the bearing response data under the physical axis；
Bearing response data under the physical axis is analyzed, analysis result is obtained；
According to the analysis result, fault detect is carried out to the bearing.
4. according to any methods of claim 1-3, which is characterized in that, will be described according to the axial period of the imaginary axis
The synchronously sampled data of physical axis is converted into before the synchronously sampled data of the imaginary axis, further includes：
Acquire the shaft speed signal of parts response signal and the physical axis；
According to the shaft speed signal of the parts response signal and the physical axis, generates the parts response signal and correspond to
Parts response data and the physical axis the corresponding physical axis of shaft speed signal axle speed degrees of data；
According to the axial period of the physical axis, processing is synchronized to the parts response data, obtains the physical axis
Synchronously sampled data；
The parts response data includes：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response data and
The damage response data and its high-order harmonic wave of its high-order harmonic wave, ball or roller, the damage data of bearing retainer and its high-order
Harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
5. according to any methods of claim 1-3, which is characterized in that, will be described according to the axial period of the imaginary axis
The synchronously sampled data of physical axis is converted into before the synchronously sampled data of the imaginary axis, further includes：
The shaft speed signal of the parts response signal and known axes is acquired, the known axes are that can directly measure axle speed
The axis of degree；
According to the shaft speed signal of the parts response signal and the known axes, generates the parts response signal and correspond to
Parts response data and the known axes the corresponding known axes of shaft speed signal axle speed degrees of data；
According to the axial period of the physical axis, the known axes axle speed degrees of data and the known axes and the physical axis between
Kinematic relation, the parts response data is converted into the synchronously sampled data of the physical axis；
The parts response data includes：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response data and
The damage response data and its high-order harmonic wave of its high-order harmonic wave, ball or roller, the damage data of bearing retainer and its high-order
Harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
6. according to any methods of claim 1-3, which is characterized in that the Damage coefficient of the bearing is according to the axis
What the geometric parameter held determined；
The geometric parameter of the bearing includes：Contact angle, the pitch diameter of ball or set of rollers, ball or roller diameter and rolling
Pearl or roller number.
7. a kind of detection device of bearing fault, which is characterized in that including：
Determining module, for according to the Damage coefficient of bearing and the axial period of the physical axis mating with the bearing, determining structure
The axial period for the imaginary axis made, the physical axis are the axis being connected directly with the bearing；
The synchronously sampled data of the physical axis is converted into described by conversion module for the axial period according to the imaginary axis
The synchronously sampled data of imaginary axis；
First processing module synchronizes average treatment for the synchronously sampled data to the imaginary axis, obtains the bearing
Axial period of the damage response under the imaginary axis synchronizes damage response data；
Detection module, for synchronizing damage response number according to axial period of the damage response of the bearing under the imaginary axis
According to bearing progress fault detect.
8. device according to claim 7, which is characterized in that the determining module is specifically used for：
The axial period of the physical axis and the Damage coefficient of the bearing are divided by, the period of imaginary axis is obtained.
9. device according to claim 7, which is characterized in that the detection module is specifically used for：
According to the axial period of the physical axis, axial period of the damage of the bearing response under the imaginary axis is synchronized into damage and is rung
Answer data conversion at the bearing response data under the physical axis；
Bearing response data under the physical axis is analyzed, analysis result is obtained；
According to the analysis result, fault detect is carried out to the bearing.
10. according to any devices of claim 7-9, which is characterized in that further include：
First acquisition module, the shaft speed signal for acquiring parts response signal and the physical axis；
First generation module, for according to the shaft speed signal of the parts response signal and the physical axis, described in generation
The axle speed of the corresponding physical axis of shaft speed signal of the corresponding parts response data of parts response signal and the physical axis
Degrees of data；
Second processing module synchronizes processing for the axial period according to the physical axis to the parts response data,
Obtain the synchronously sampled data of the physical axis；
The parts response data includes：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response data and
The damage response data and its high-order harmonic wave of its high-order harmonic wave, ball or roller, the damage data of bearing retainer and its high-order
Harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
11. according to any devices of claim 7-9, which is characterized in that described device further includes：
Second acquisition module, the shaft speed signal for acquiring the parts response signal and known axes, the known axes are
The axis of axle speed can directly be measured；
Second generation module, for according to the shaft speed signal of the parts response signal and the known axes, described in generation
The axle speed of the corresponding known axes of shaft speed signal of the corresponding parts response data of parts response signal and the known axes
Degrees of data；
Third processing module, for according to the axial period of the physical axis, the axle speed degrees of data of the known axes and described known
Kinematic relation between axis and the physical axis, the parts response data are converted into the synchronized sampling number of the physical axis
According to；
The parts response data includes：
Shaft rotation dynamic response data, bearing inner race damage response data and its high-order harmonic wave, bearing outer ring damage response data and
The damage response data and its high-order harmonic wave of its high-order harmonic wave, ball or roller, the damage data of bearing retainer and its high-order
Harmonic wave and gear engage at least one of response data and its high-order harmonic wave.
12. according to any devices of claim 7-9, which is characterized in that the Damage coefficient of the bearing is according to
What the geometric parameter of bearing determined；
The geometric parameter of the bearing includes：Contact angle, the pitch diameter of ball or set of rollers, ball or roller diameter and rolling
Pearl or roller number.
13. a kind of wind power generating set, including generator and the gearbox that is connect with the generator, which is characterized in that it is described
Wind power generating set further includes：Device described in any one of claim 7-12, to the bearing in the gearbox into
Row fault detect.
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| CN108572074B (en) | 2020-07-10 |
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