CN107448362A - State monitoring method and device for slewing bearing and wind generating set - Google Patents
State monitoring method and device for slewing bearing and wind generating set Download PDFInfo
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- CN107448362A CN107448362A CN201610379279.8A CN201610379279A CN107448362A CN 107448362 A CN107448362 A CN 107448362A CN 201610379279 A CN201610379279 A CN 201610379279A CN 107448362 A CN107448362 A CN 107448362A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000006073 displacement reaction Methods 0.000 claims abstract description 56
- 238000012360 testing method Methods 0.000 claims abstract description 49
- 238000000407 epitaxy Methods 0.000 claims description 70
- 239000000523 sample Substances 0.000 claims description 16
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- 238000004364 calculation method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/24—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a method and a device for monitoring the state of a slewing bearing and a wind generating set. A bearing outer extension portion fixedly connected with an outer ring is arranged at the outer ring of the slewing bearing, and the method comprises the following steps: acquiring displacement data of a test position on the bearing extension part; determining the deformation of the slewing bearing according to the acquired displacement data; and determining the loss state of the slewing bearing according to the deformation. By adopting the technical scheme of the invention, the deformation of the slewing bearing can be amplified through the bearing extension part, so that the damage of the slewing bearing can be effectively monitored conveniently.
Description
Technical field
The present invention relates to technology for mechanical fault diagnosis field, more particularly to a kind of status monitoring side of pivoting support bearing
Method, device and wind power generating set.
Background technology
Pivoting support bearing is the common components in mechanical structure, and its running status produces direct to the performance of mechanical structure
Influence.During the long-play of pivoting support bearing, when larger abrasion be present in its Internal and external cycle and ball, Internal and external cycle it
Between clearance can become big, if pivoting support bearing is born compared with big load, easily cause Internal and external cycle separation；And pivoting support bearing
Internal and external cycle be also possible that fatigue crack.If pivoting support bearing this kind of heavy wear occurs or the damage of crackle be present, hold
Be easily caused its connection mechanical structure there was a mechanical failure.
But because pivoting support bearing is usually used in the rotary part of low-speed heave-load (for example, the change oar of wind power generating set
Bearing), it is difficult to be detected with the vibration means of routine.The wide variety of supersonic guide-wave technology in pipeline crack monitoring,
Wide variety of acoustic emission in the crack detection of pressure vessel, and other conventional detection means, due to revolution branch
There is more fixing bolt in support bearing, crack Propagation is slow, it is smaller to produce energy, or during slewing bearing operation
Friction interference etc. reason, can not be applied in the damage monitoring of slewing bearing.
In a word, the detection means of prior art, can not in the running of slewing bearing, to its heavy wear,
Crackle equivalent damage is effectively monitored.
The content of the invention
Embodiments of the invention provide a kind of state monitoring method of pivoting support bearing, device and wind power generating set,
Effectively monitored with heavy wear of the realization to slewing bearing, crackle equivalent damage.
To reach above-mentioned purpose, embodiments of the invention provide a kind of state monitoring method of pivoting support bearing, are returning
Turn to be provided with the bearing epitaxy part being fastenedly connected with the outer ring at the outer ring of bearing support, methods described includes：Described in acquisition
The displacement data of test position on bearing epitaxy part；The displacement data according to getting determines the pivoting support bearing
Deflection；The loss state of the pivoting support bearing is determined according to the deflection.
Preferably, the processing of the displacement data for obtaining the test position on the bearing epitaxy part includes：Obtain and visit
Head is arranged on the displacement data that the current vortex sensor on the test position gathers the test position on the bearing epitaxy part；
Wherein, distance of the test position away from the bearing epitaxy part edge is straight more than or equal to the probe of the current vortex sensor
The setting multiple in footpath.
Preferably, the corresponding angular range in the part being fastenedly connected with the bearing epitaxy part of the outer ring for 90 degree~
120 degree.
Preferably, the processing of the loss state that the pivoting support bearing is determined according to the deflection includes：Such as
Deflection described in fruit exceedes default deformation threshold value, it is determined that the pivoting support bearing has crackle or heavy wear.
Preferably, the pivoting support bearing is the pitch variable bearings of wind power generating set, and in the wind-driven generator
Methods described is performed in the master control system of group.
Preferably, methods described also includes：Obtain the floor data of the wind power generating set；It is described according to the deformation
Amount determines that the processing of the loss state of the pivoting support bearing includes：If the deflection is corresponding more than the floor data
Default deformation threshold value, it is determined that crackle or heavy wear be present in the pitch variable bearings.
Preferably, deformation threshold value is preset corresponding to the floor data to be included：It is imitative that deformation is carried out according to experiment condition data
True the first default deformation threshold value for calculating acquisition, and/or second determined according to history floor data and history deformation data are pre-
If deform threshold value；Wherein, the leaf position data of the floor data including the wind power generating set and/or local environment
Air speed data.
According to another aspect of the present invention, embodiments of the invention also provide a kind of status monitoring dress of pivoting support bearing
Put, described device includes：Bearing epitaxy part, it is arranged at the outer ring of pivoting support bearing and is fastenedly connected with the outer ring；Position
Data acquisition module is moved, for gathering the displacement data of the test position on the bearing epitaxy part；Deflection determining module, use
In the deflection that the pivoting support bearing is determined according to the displacement data collected；State determining module is lost, is used for
The loss state of the pivoting support bearing is determined according to the deflection.
Preferably, the displacement data acquisition module includes current vortex sensor；The probe of the current vortex sensor is set
Put on the test position, for gathering the displacement data of the test position on the bearing epitaxy part；Wherein, the test
Distance of the position away from the bearing epitaxy part edge is more than or equal to the preset multiple of the diameter of the probe.
Preferably, the corresponding angular range in the part being fastenedly connected with the bearing epitaxy part of the outer ring for 90 degree~
120 degree.
Preferably, if the loss state determining module is used for the deflection and exceedes default deformation threshold value, it is determined that
Crackle or heavy wear be present in the pivoting support bearing.
Preferably, the pivoting support bearing is the pitch variable bearings of the wind power generating set, and described device is arranged on institute
In the master control system for stating wind power generating set.
Preferably, described device also includes：Floor data receiving module；For obtaining the operating mode of the wind power generating set
Data；The loss state determining module is used for：If the deflection, which exceedes, presets deformation threshold corresponding to the floor data
Value, it is determined that the pitch variable bearings have crackle or heavy wear.
Preferably, deformation threshold value is preset corresponding to the floor data to be included：It is imitative that deformation is carried out according to experiment condition data
True the first default deformation threshold value for calculating acquisition, and/or second determined according to history floor data and history deformation data are pre-
If deform threshold value；Wherein, the leaf position data of the floor data including the wind power generating set and/or local environment
Air speed data.
According to another aspect of the present invention, embodiments of the invention also provide a kind of wind power generating set, the wind-force hair
The state monitoring apparatus of above-mentioned pivoting support bearing is provided with group of motors.
The method and device of the status monitoring for the pivoting support bearing that embodiments of the invention provide, by pivoting support
Bearing epitaxy part is set at the outer ring of bearing, to amplify the deflection of pivoting support bearing, and by gathering bearing epitaxy part
Displacement data to determine the deflection of pivoting support bearing indirectly, and then determines the loss state of pivoting support bearing, Ke Yiyou
Effect ground carries out damage monitoring to pivoting support bearing.
Brief description of the drawings
Fig. 1 is the flow chart of the state monitoring method for the pivoting support bearing that embodiments of the invention one provide；
Fig. 2 is the working state schematic representation for the pivoting support bearing that embodiments of the invention one provide；
Fig. 3 is the flow chart of the state monitoring method for the pivoting support bearing that embodiments of the invention two provide；
Fig. 4 is the structured flowchart of the state monitoring apparatus for the pivoting support bearing that embodiments of the invention four provide；
Fig. 5 is the structured flowchart of the state monitoring apparatus for the pivoting support bearing that embodiments of the invention five provide.
Drawing reference numeral explanation：
201st, outer ring；202nd, inner ring；203rd, bearing epitaxy part；204th, pivoting support bearing driving arm；205th, displacement passes
Sensor；206th, displacement sensor bracket.
Embodiment
The basic conception of the present invention is to provide a kind of state monitoring method of pivoting support bearing, device and wind-power electricity generation
Unit, the bearing epitaxy part being fastenedly connected with outer ring is set on the outer ring of pivoting support bearing, for amplifying pivoting support axle
The deflection held, and the displacement data for gathering bearing epitaxy part to determine the deflection of pivoting support bearing indirectly, according to the change
Shape amount correspondingly determines the loss state of pivoting support bearing.Thus, it is possible in the running of pivoting support bearing, it is real
Now effective monitoring of the loss state to pivoting support bearing, with avoid the occurrence of damaged by pivoting support bearing caused by machinery
Failure.
State monitoring method, device and the wind for the pivoting support bearing that embodiments of the invention are provided below in conjunction with the accompanying drawings
Power generator group is described in detail.
Embodiment one
Fig. 1 is the flow chart of the state monitoring method for the pivoting support bearing that embodiments of the invention one provide.Can be by example
State monitoring apparatus as shown in Figure 4 or the mechanical structure (for example, wind power generating set) including the state monitoring apparatus perform
This method.
As shown in figure 1, the displacement data of the test position on step S110, acquisition bearing epitaxy part.
In the running of pivoting support bearing, the damage (fatigue crack, the abrasion that occur due to pivoting support bearing
Deng) caused by deflection it is smaller, the difficulty directly detected is higher, and the degree of accuracy is relatively low.According to the present invention basic conception,
In order to detect the deflection of pivoting support bearing exactly and reduce difficulty of test, set on pivoting support bearing outside bearing
Prolong portion, for amplifying the deflection of pivoting support bearing, can be turned round by the deflection for obtaining bearing epitaxy part with indirect gain
The deflection of bearing support.
As shown in Fig. 2 bearing epitaxy part 203, bearing epitaxy part 203 are set at the outer ring 201 of pivoting support bearing
(by connection components such as bolts) is fastenedly connected in the periphery of outer ring 201.If inner ring 202 or outer ring 201 are cracked or interior
There is heavy wear with outer ring 201 in circle 202, then pivoting support bearing is deformed, and its deflection is smaller, and bearing epitaxy part
203 deflection is larger.The deflection of bearing epitaxy part 203 can be by test bearing epitaxy part 203 in pivoting support bearing
Running in displacement data determine.
In a kind of feasible implementation, test position is selected on bearing epitaxy part 203 to set displacement transducer
205, and by setting displacement sensor bracket 206 on pivoting support bearing driving arm 204, in pivoting support bearing
Running in, make displacement transducer 205 is stable to be arranged on test position.In this way, can be with the position of collecting test position
Move data, the displacement data as bearing epitaxy part 203.
In step S120, the deflection of pivoting support bearing is determined according to the displacement data got.
After the displacement data of bearing epitaxy part of collection is got, determined accordingly based upon the displacement data outside bearing
Prolong the deflection (for example, displacement variable) in portion.According to default corresponding relation, the deflection of bearing epitaxy part is directly converted
For the deflection of pivoting support bearing, and then correspondingly determine the deflection of bearing epitaxy part.
For example, the deflection of bearing epitaxy part and the deflection of pivoting support bearing are linear, by bearing epitaxy part
Deflection such as 2/3) be multiplied by fixed value (fixed value be less than 1, you can to calculate the deflection of pivoting support bearing.
In step S130, the loss state of pivoting support bearing is determined according to deflection.
It is determined that after the deflection of pivoting support bearing, it can judge whether pivoting support bearing is according to deflection
Normal operating condition.If the deflection of pivoting support bearing is smaller, it is determined that its extent of deterioration is smaller, in this case under
Pivoting support bearing, it can be considered that it is not damaged, in normal operating condition.If the deflection of pivoting support bearing is larger,
Then determine that its extent of deterioration is larger, in this case under pivoting support bearing, can be considered that it has been damaged, in tight
State is lost again.
In addition, however, it is determined that pivoting support bearing is in severe attrition state, can correspondingly alert (alarm
Information includes the information such as the position of pivoting support bearing), for having notified the corresponding pivoting support bearing of staff in time
Through occurring damaging, it is necessary to change or safeguard, the purpose for causing mechanical breakdown is avoided so as to reach.
The state monitoring method for the pivoting support bearing that embodiments of the invention provide, pass through setting and pivoting support bearing
The bearing epitaxy part that is fastenedly connected of outer ring, the displacement data of collection bearing epitaxy part carrys out the change of indirectly testing pivoting support bearing
Shape amount, and the loss state of pivoting support bearing is correspondingly determined, by amplifying the deflection of pivoting support bearing, realize
To effective monitoring of pivoting support bearing damage in the running of pivoting support bearing, and measuring accuracy is higher, test is difficult
Spend relatively low.
Embodiment two
Fig. 3 is the flow chart of the state monitoring method for the pivoting support bearing that embodiments of the invention two provide.This method
It can be considered a kind of specific implementation of the state monitoring method of the pivoting support bearing of embodiment illustrated in fig. 1.
As shown in figure 3, in step S310, obtain outside the current vortex sensor collection bearing that probe is arranged on test position
Prolong the displacement data of the test position in portion.
In the present embodiment, can by the way that the probe of current vortex sensor is arranged on the test position on bearing epitaxy part,
The advantages that using current vortex sensor good reliability, high sensitivity, strong antijamming capability, come accurately on test bearing epitaxy part
Displacement data.Certainly, in other embodiments, other types of displacement transducer can also be used.
Preferably, the distance at test position distance between bearing epitaxy part edge is more than or equal to the probe diameter of current vortex sensor
Preset multiple.
When selecting test position on bearing epitaxy part, the distance on bearing epitaxy part with edge is selected to be more than or equal to electricity
Position at the preset multiple of the probe diameter of eddy current sensor, as the central point of test position, for making bearing epitaxy part
Upper test area is sufficiently large, improves the measuring accuracy of current vortex sensor.For example, the preset multiple is 1.5 times, equivalent to test
The radius of area is not less than 3 times of probe radius, and test area can be made to ensure bearing not less than 9 times of probe area
The tested area of epitaxy part is sufficiently large, and (theoretical value is usually that current vortex passes to the theoretical value for reaching required by current vortex sensor
9 times of the probe area of sensor), ensure measuring accuracy.
Therefore, the extension size of bearing epitaxy part needs sufficiently large, could meet the requirement of above-mentioned tested area.For example,
Bearing epitaxy part is along 1.5 times of the radially outwardly extending radius to pivoting support bearing of pivoting support bearing, and convenience is in bearing extension
Test position is selected to test its displacement data in portion.It is smaller to be additionally, since the deformation of bearing epitaxy part, by increasing outside bearing
Prolong the extension size in portion, measuring accuracy can be improved.
Preferably, the corresponding angular range in the part being fastenedly connected with bearing epitaxy part of the outer ring of pivoting support bearing is
90 degree~120 degree.
Angular range mentioned here, for limited bearing epitaxy part along the circumferential length of pivoting support bearing, make extension
Size is sufficiently large, to ensure measuring accuracy；Meanwhile extension size is limited again, avoid influenceing the normal operation of pivoting support bearing.
Its occurrence, can be according to the specific installing space of pivoting support bearing, determine to factors such as the predicted values of deflection.
In addition, the present embodiment is not limited along the axial width of pivoting support bearing bearing epitaxy part, it is suitable to meet
Installing space and conveniently tested.
In step S320, the deflection of pivoting support bearing is determined according to the displacement data got.
Specifically, according to default algorithm, after the deflection that the displacement data of acquisition is converted to bearing epitaxy part, directly turn
Turn to the deflection of corresponding bearing epitaxy part.
In step S330, if deflection exceedes default deformation threshold value, it is determined that pivoting support bearing has crackle or place
In heavy wear state.
Wherein, preset deformation threshold value be pivoting support bearing in mechanical structure is specified, carry the effect of certain extraneous load
Under, can normal operation when corresponding deformation amount standard value.Its occurrence can pass through at least one of following two modes
To determine：
First, the first default deformation threshold value, obtains operating mode number of the pivoting support bearing in the case where specifying mechanical structure difference operating mode
According to using the floor data of acquisition as experiment condition data, using simulation calculation simulation pivoting support bearing under different operating modes
Running status, and then draw slewing bearing in the deformation data under different operating modes.Obtained by simulation calculation
Deformation data is the deflection theoretical value of pivoting support bearing, that is, the first default deformation threshold value is theoretical value.
2nd, the second default deformation threshold value, the empirical value of the deflection of the pivoting support bearing obtained according to statistics determine, i.e.,
In the history deformation data of the pivoting support bearing obtained from different time sections, the current working with pivoting support bearing is obtained
Deformation data corresponding to identical history operating mode is as the second default deformation threshold value.That is, the second default deformation threshold value is
Historical data.
If the inner ring of pivoting support bearing or outer ring are cracked, or larger (this of the abrasion of inner ring or outer ring and ball
The life-span of pivoting support bearing has arrived the limit), in the presence of extraneous load, to displacement, what is got returns Internal and external cycle generation property
Default deformation threshold value can even be exceeded by turning the deformation of bearing support.Therefore, if the deflection obtained exceedes default deformation threshold value,
The loss state that pivoting support bearing can be determined is that Internal and external cycle has crackle or Internal and external cycle heavy wear.Now, pivoting support
Bearing has damaged, it is impossible to continues normal operation, is otherwise likely to result in mechanical breakdown at any time.
In specifically application scenarios, only it can be compared using the first default deformation threshold value with the deflection detected
Compared with to judge whether pivoting support bearing damages.But due to pivoting support can not be simulated completely by simulation calculation
The actual moving process of bearing, so the first above-mentioned default deformation threshold value is not entirely accurate.If the first default deformation threshold
It is worth less than normal, then testing result indicates that pivoting support bearing occurs damaging, it is necessary to which staff carries out Site Detection confirms to examine more
Result is surveyed, and adjusts the first default simulated program for deforming threshold value to improve measuring accuracy.If the first default deformation threshold value is bigger than normal
(being more than the second default deformation threshold value), then it is pre- can will to combine first after the deflection of pivoting support bearing is obtained
If deformation threshold value and second presets deformation threshold value to judge whether pivoting support bearing damages.
For example, the first step, by the deflection of acquisition compared with the first default deformation threshold value, if deflection is more than first
Default deformation threshold value, it is determined that pivoting support bearing damages.If deflection is carried out not less than the first default deformation threshold value
Second step, by the deflection of acquisition compared with the second default deformation threshold value.If deflection is default more than second to deform threshold value,
Determine that pivoting support bearing damages；If deflection is not less than the second default deformation threshold value, it is determined that pivoting support bearing is not
Damage.
The state monitoring method for the pivoting support bearing that embodiments of the invention provide, on the basis of embodiment illustrated in fig. 1
On, the concrete mode of the displacement data using current vortex sensor collection bearing epitaxy part is further illustrated, improves test
Precision；And the specific method for determining pivoting support bearing loss state is shown, ensure the damage carried out to pivoting support bearing
Status monitoring is consumed, presence crackle, the heavy wear equal loss's state of pivoting support bearing can be detected in time.
Embodiment three
The present embodiment is using above-described embodiment one or the state monitoring method of the pivoting support bearing of embodiment two, to monitor
The loss state of the pitch variable bearings of wind power generating set.
When performing the above method, using the pitch variable bearings (one or more) of wind power generating set as pivoting support to be measured
Bearing, and this method is performed by the master control system of wind power generating set.
In a kind of feasible implementation, bearing epitaxy part is set on the outer ring of pitch variable bearings, and in bearing extension
Suitable test position is chosen in portion, sets displacement transducer (such as current vortex sensor) to gather the displacement on bearing epitaxy part
The displacement data collected is sent to the master control system of wind power generating set by data, displacement transducer, you can makes master control system
Loss state to pitch variable bearings is monitored.
Wherein, displacement transducer is arranged in the pitch-controlled system of wind power generating set, can be by connected wireless
The displacement data collected is sent to master control system by router.In addition, the pitch axis that master control system can also obtain determination
The data of the deflection held, Cloud Server is uploaded to by wireless network (for example, communication card is provided with master control system), with side
Just client downloads the data progress labor of deflection in distal end.
Preferably, before the step of performing the loss state for determining pitch variable bearings, the operating mode of wind power generating set is obtained
Data, and the deflection and the floor data of the pitch variable bearings determined are combined, judge the deformation of the pitch variable bearings under different operating modes
Whether amount exceedes corresponding default deformation threshold value, and then determines the loss state of pitch variable bearings.
In the application scenarios of reality, according to the floor data of acquisition, by the deflection of the pitch variable bearings detected with being somebody's turn to do
Deformation threshold value (including the first default deformation threshold value in above-described embodiment two and second pre- is preset corresponding to operating mode residing for deflection
If deformation threshold value) it is compared.In this way, equivalent to by pitch variable bearings, in different operating modes, corresponding load is mutually tied with deflection
Close, can be accurately determined whether pitch variable bearings damage.
Preferably, the floor data includes the leaf position data of wind power generating set and the air speed data of local environment.
Due to the pitch variable bearings directly or indirectly band movable vane piece rotation of wind power generating set, the position of blade and local environment
Wind speed be to determine the key factor of load that pitch variable bearings are carried, by regarding leaf position data and air speed data as work
Condition data, it is combined with the deflection of pitch variable bearings, can be more accurately determined whether pitch variable bearings damage.In addition,
The floor data can also include power data of the rotary speed data of the blade of wind power generating set, generator etc..
In the present embodiment, to the deflection of the pitch variable bearings detected, carry out respectively and the first default deformation threshold value and the
The contrast of two default deformation threshold values.Specifically, simulation calculation is carried out according to the operating mode of different wind speed apparatus for lower wind generating sets, obtained
The simulation value of the deflection of pitch variable bearings is as the first default deformation threshold value under different wind speed；And according to different wind speed, with 10
Minute for a statistics duration, count the pitch variable bearings detected in multiple statistics durations under different wind speed deflection (or
Count the data such as average value, the variation tendency of the deflection detected in duration) as the second default deformation threshold value.
First step contrast is carried out first, if the deflection of the pitch variable bearings detected is default more than first to deform threshold value,
Determine that pitch variable bearings occur damaging, it is necessary to which staff carries out field review.If the deflection of the pitch variable bearings detected does not surpass
The first default deformation threshold value is crossed, then temporarily determines that pitch variable bearings do not damage.Now, second step contrast is carried out, if detecting
Pitch variable bearings deflection deformation threshold value default more than second, it is determined that pitch variable bearings damage；If the change oar detected
The deflection of bearing is not less than the second default deformation threshold value, it is determined that pitch variable bearings can continue normal operation.
Wherein, when carrying out second step contrast, can by will one count the deflection that detects in duration, and before
One (or multiple) count the deflection (deformation threshold value default equivalent to second) that duration detects and contrasted.For example, table 1
For one statistics duration in different wind speed section corresponding deformation amounts distributed area statistical form, by table 1 with it is previous it is (multiple) statistics
The distributed area statistical form of deflection corresponding to duration is contrasted, and can obtain the variation tendency of detected deflection.
If the distributed area for the deflection that comparing result instruction detects illustrates what is be distributed in identical deflection section in trend is moved to right
The data of the deflection detected increase, now, can equivalent to the above-mentioned deflection detected more than the second default deformation threshold value
To determine that pitch variable bearings damage.
The different wind speed sections of table 1. correspond to the distributed area statistical form of the deflection of pitch variable bearings
Alternatively, the loss state of the master control system of wind power generating set pitch variable bearings determined by, comes correspondingly
Control the operation of wind power generating set.For example, if the loss state instruction pitch variable bearings of pitch variable bearings do not damage, lead
Control system control wind power generating set continues normal operation；If the loss state instruction pitch variable bearings of pitch variable bearings have damaged
Wound, then master control system control wind power generating set feathering shutdown, to be changed or be safeguarded to pitch variable bearings.
Embodiments of the invention utilize the state monitoring method of above-mentioned pivoting support bearing, to wind power generating set
Pitch variable bearings carry out the monitoring of loss state, and pitch variable bearings can be accurately monitored in the running of wind power generating set is
It is no to damage, cause blade the accident such as to drop so as to effectively avoid pitch variable bearings from occurring damaging.
Example IV
The structured flowchart of the state monitoring apparatus for the pivoting support bearing that Fig. 4 provides for embodiments of the invention four, the dress
Put available for the state monitoring method for performing the pivoting support bearing that above-described embodiment one provides.
As shown in figure 4, the device includes bearing epitaxy part 410, displacement data acquisition module 420, deflection determining module
430 and loss state determining module 440.
Wherein：Bearing epitaxy part 410 is arranged at the outer ring of pivoting support bearing and is fastenedly connected with outer ring；Displacement data
Acquisition module 420 is used for the displacement data for gathering the test position on bearing epitaxy part；Deflection determining module 430 is used for basis
The displacement data collected determines the deflection of pivoting support bearing；State determining module 440 is lost for true according to deflection
Determine the loss state of pivoting support bearing.
The state monitoring apparatus for the pivoting support bearing that embodiments of the invention provide, using being arranged on pivoting support bearing
On bearing epitaxy part, to amplify the deflection of pivoting support bearing, and the displacement number of the bearing epitaxy part using convenient collection
According to, carry out the deflection of indirectly testing pivoting support bearing, so that the loss state of pivoting support bearing is correspondingly determined, test essence
Degree is higher, difficulty of test is relatively low, realizes to whether pivoting support bearing the effective monitoring damaged occurs.
Embodiment five
The structured flowchart of the state monitoring apparatus for the pivoting support bearing that Fig. 5 provides for embodiments of the invention five, the dress
Put a kind of specific implementation for the state monitoring apparatus that can be considered pivoting support bearing shown in Fig. 4.
Preferably, displacement data acquisition module includes current vortex sensor；The probe of current vortex sensor is arranged on test
On position, for gathering the displacement data of the test position on normal epitaxy part；Wherein, test position distance between bearing epitaxy part edge
Distance be more than or equal to probe diameter preset multiple.
Preferably, the corresponding angular range in the part being fastenedly connected with bearing epitaxy part 410 of outer ring is 90 degree~120
Degree.
Preferably, if loss state determining module 440 is used for deflection and exceedes default deformation threshold value, it is determined that revolution branch
Hold bearing and crackle or heavy wear be present.
Preferably, pivoting support bearing is the pitch variable bearings of wind power generating set, and the device is arranged on wind power generating set
Master control system in.
Preferably, the device also includes：Floor data receiving module 450, for obtaining the operating mode number of wind power generating set
According to；Exceed default deformation threshold value corresponding to floor data if state determining module 440 is lost and is used for deflection, it is determined that become oar
Crackle or heavy wear be present in bearing.
Preferably, deformation threshold value is preset corresponding to floor data to be included：Floor data is calculated using preset algorithm
The the first default deformation threshold value drawn, and/or second obtained in operating mode identical history operating mode corresponding with floor data
Default deformation threshold value with；Wherein, floor data includes the leaf position data of wind power generating set and the wind speed number of local environment
According to.
The state monitoring apparatus of pivoting support bearing provided in an embodiment of the present invention, in the shown device of above-described embodiment four
On the basis of, the concrete mode of the displacement data using current vortex sensor collection bearing epitaxy part is further illustrated, and determine
The specific method of state is lost in pivoting support bearing, and loss shape can be accurately monitored in the running of pivoting support bearing
State；And the concrete mode of the pitch variable bearings of monitoring wind power generating set is further illustrated, whether pitch variable bearings can be gone out
Now damage is effectively monitored.
On this basis, embodiments of the invention also provide a kind of wind power generating set, are set in the wind power generating set
There is the state monitoring apparatus for being used to monitor the pivoting support bearing of the pitch variable bearings of wind power generating set shown in Fig. 4 or Fig. 5.
It may be noted that according to the needs of implementation, all parts/step described in this application can be split as more multi-section
Part/step, the part operation of two or more components/steps or components/steps can be also combined into new components/steps,
To realize the purpose of the present invention.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (15)
1. a kind of state monitoring method of pivoting support bearing, it is characterised in that be provided with the outer ring of pivoting support bearing
The bearing epitaxy part being fastenedly connected with the outer ring, methods described include：
Obtain the displacement data of the test position on the bearing epitaxy part；
The displacement data according to getting determines the deflection of the pivoting support bearing；
The loss state of the pivoting support bearing is determined according to the deflection.
2. according to the method for claim 1, it is characterised in that described to obtain test position on the bearing epitaxy part
The processing of displacement data includes：
Obtain the test position on the current vortex sensor collection bearing epitaxy part that probe is arranged on the test position
Displacement data；Wherein, distance of the test position away from the bearing epitaxy part edge passes more than or equal to the current vortex
The setting multiple of the probe diameter of sensor.
3. according to the method for claim 1, it is characterised in that the outer ring is fastenedly connected with the bearing epitaxy part
Angular range corresponding to part is 90 degree~120 degree.
4. according to the method in any one of claims 1 to 3, it is characterised in that described that institute is determined according to the deflection
Stating the processing of the loss state of pivoting support bearing includes：
If the deflection exceedes default deformation threshold value, it is determined that the pivoting support bearing has crackle or heavy wear.
5. according to the method for claim 4, it is characterised in that the pivoting support bearing is the change oar of wind power generating set
Bearing, and perform methods described in the master control system of the wind power generating set.
6. according to the method for claim 5, it is characterised in that methods described also includes：
Obtain the floor data of the wind power generating set；
The processing of the loss state that the pivoting support bearing is determined according to the deflection includes：
If the deflection, which exceedes, presets deformation threshold value corresponding to the floor data, it is determined that the pitch variable bearings, which exist, to be split
Line or heavy wear.
7. according to the method for claim 6, it is characterised in that deformation threshold value is preset corresponding to the floor data to be included：
The first default deformation threshold value of deformation simulation calculating acquisition is carried out according to experiment condition data, and/or according to history floor data
The the second default deformation threshold value determined with history deformation data；
Wherein, the floor data includes the leaf position data of the wind power generating set and/or the wind speed number of local environment
According to.
8. a kind of state monitoring apparatus of pivoting support bearing, it is characterised in that described device includes：
Bearing epitaxy part, it is arranged at the outer ring of pivoting support bearing and is fastenedly connected with the outer ring；
Displacement data acquisition module, for gathering the displacement data of the test position on the bearing epitaxy part；
Deflection determining module, for determining the deflection of the pivoting support bearing according to the displacement data collected；
State determining module is lost, for determining the loss state of the pivoting support bearing according to the deflection.
9. device according to claim 8, it is characterised in that the displacement data acquisition module senses including current vortex
Device；
The probe of the current vortex sensor is arranged on the test position, for gathering the test on the bearing epitaxy part
The displacement data of position；Wherein, distance of the test position away from the bearing epitaxy part edge is more than or equal to the probe
Diameter preset multiple.
10. device according to claim 9, it is characterised in that the outer ring is fastenedly connected with the bearing epitaxy part
Part corresponding to angular range be 90 degree~120 degree.
11. the device according to any one of claim 8 to 10, it is characterised in that the loss state determining module is used
If exceed default deformation threshold value in the deflection, it is determined that the pivoting support bearing has crackle or heavy wear.
12. according to claim 11 described device, it is characterised in that the pivoting support bearing is the wind power generating set
Pitch variable bearings, described device are arranged in the master control system of the wind power generating set.
13. according to claim 12 described device, it is characterised in that described device also includes：
Floor data receiving module, for obtaining the floor data of the wind power generating set；
The loss state determining module is used for：If the deflection, which exceedes, presets deformation threshold corresponding to the floor data
Value, it is determined that the pitch variable bearings have crackle or heavy wear.
14. according to claim 13 described device, it is characterised in that deformation threshold value is preset corresponding to the floor data to be included：
The first default deformation threshold value of deformation simulation calculating acquisition is carried out according to experiment condition data, and/or according to history floor data
The the second default deformation threshold value determined with history deformation data；
Wherein, the floor data includes the leaf position data of the wind power generating set and/or the wind speed number of local environment
According to.
15. a kind of wind power generating set, it is characterised in that set in the wind power generating set just like in claim 12 to 14
The state monitoring apparatus of pivoting support bearing described in any one.
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| CN201610379279.8A CN107448362B (en) | 2016-05-31 | 2016-05-31 | State monitoring method and device for slewing bearing and wind generating set |
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| CN201610379279.8A CN107448362B (en) | 2016-05-31 | 2016-05-31 | State monitoring method and device for slewing bearing and wind generating set |
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| US11539317B2 (en) | 2021-04-05 | 2022-12-27 | General Electric Renovables Espana, S.L. | System and method for detecting degradation in wind turbine generator bearings |
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