CN102937526B - The measurement mechanism of blower fan load, system and blower fan control system - Google Patents
The measurement mechanism of blower fan load, system and blower fan control system Download PDFInfo
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- CN102937526B CN102937526B CN201210246860.4A CN201210246860A CN102937526B CN 102937526 B CN102937526 B CN 102937526B CN 201210246860 A CN201210246860 A CN 201210246860A CN 102937526 B CN102937526 B CN 102937526B
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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
Abstract
The invention discloses a kind of measurement mechanism of blower fan load, system and blower fan control system.The measurement mechanism of this blower fan load comprises: proving ring and at least two survey sensors, and described proving ring is arranged at the disconnection section of the unit under test of blower fan, and described survey sensor is arranged on described proving ring; Described survey sensor, for measuring measuring-signal, described measuring-signal is for generating load.In the present invention, because survey sensor is arranged on proving ring, and non-immediate is pasted on blower fan, therefore this measurement mechanism can complete in laboratory to load and demarcate, and carry out loading demarcation without the need to scene, improve the degree of accuracy loading and demarcate, thus improve the measuring accuracy of load.
Description
Technical field
The present invention relates to technical field of wind power generation, particularly a kind of measurement mechanism of blower fan load, system and blower fan control system.
Background technology
The root of blade cross section of wind power generating set (hereinafter referred to as blower fan) and the load in pylon each flange cross section are the important evidence of its design and certification, for assessment of blower fan long service safety, failure prediction and diagnosis.Because the complicacy of blower fan system, external environment condition unpredictability and simulation analysis model may existing defects and uncertain factors, therefore need to carry out proof load by test, IEC61400-13 standard has carried out clear and definite regulation to load test content.Due to the root of blade cross section of blower fan and the load in pylon each flange cross section huge, therefore also there is no maturation, accurate special measuring technology.At present, Wintest and Moog adopts strain ga(u)ge and fibre optic strain sensor to measure load respectively, strain ga(u)ge and fibre optic strain sensor all can the inner wall surface of distance root of blade 1.5m place or tower cylinder vertically 90 ° be uniformly distributed, thus measure the load of root of blade and pylon.
Fig. 7 is the application schematic diagram of strain ga(u)ge in prior art, Fig. 8 be in Fig. 7 B-B to cut-open view, as shown in Figure 7 and Figure 8, adhering resistance strainometer R1, R2, R3 and R4 on the inwall of unit under test 12, R1, R2, R3 and R4 lay respectively at unit under test 12 fourth class office circumferentially, and R1, R2, R3 and R4 are pasted on the inwall of unit under test 12 in the axial direction.Unit under test 12 can be blade or pylon, and when unit under test 12 is blade, strain ga(u)ge Pasting is in root of blade.It should be noted that: for clearly giving expression to the structure of strain ga(u)ge in Fig. 7, drawing the plane structure chart also simultaneously depicting R3 outside the R3 be pasted on inwall, that is: the figure of this label indication of R3 in Fig. 7.Fig. 9 is the schematic diagram that in Fig. 7, strain ga(u)ge carries out load measurement by full-bridge or half-bridge, as shown in Figure 9, if when passing through full bridge measurement load, load function is
if during by half bridge measurement, load function is
wherein, Δ U
ofor the output signal of strain ga(u)ge, U
ifor the input signal of strain ga(u)ge, k is the sensitivity coefficient of foil gauge in strain ga(u)ge, and r is the distance in strain measurement point and the center of circle, and E is the elasticity modulus of materials of unit under test, and W is the module of anti-bending section measuring cross section.M can be decomposed into along the X-axis of coordinate system and Y-axis owing to acting on the load measuring cross section
xand M
y, the i=x therefore in above-mentioned load function, y.Then in above-mentioned load function, coefficient C
ic can be comprised
xand C
y, M
im can be comprised
xand M
y.At known Δ U
oand C
iprerequisite under, calculate load M by load function
i, wherein, Δ U
omeasured by strain ga(u)ge and obtain, and C
xand C
yneed to load the mode of demarcating by scene to obtain.
The measurement of blower fan load can also be carried out by fibre optic strain sensor in prior art.Fibre optic strain sensor is broadly divided into profile fibre optic strain sensor and multipoint type fibre optic strain sensor, the testing precision of multipoint type fibre optic strain sensor is apparently higher than profile fibre optic strain sensor, therefore usually adopt the strain of multipoint type fibre optic strain sensor thermometrically point when blower fan load measurement, and derive load by strain.Typical multipoint type fibre optic strain sensor is that (Fiber Bragg Grating, hereinafter referred to as FBG) structure for Fiber Bragg Grating FBG.Fibre optic strain sensor can reflect specific wavelength light and by the light of other wavelength, when fibre optic strain sensor part is subject to straining, cycle and wavelength also change, and reflection wavelength is proportional with strain, and the change namely by measuring wavelength can calculate strain size.Figure 10 is the application schematic diagram of fibre optic strain sensor in prior art, Figure 11 be in Fig. 9 C-C to cut-open view, as shown in Figure 10 and Figure 11, the inwall of unit under test 12 pastes FBG1, FBG2, FBG3 and FBG4, FBG1, FBG2, FBG3 and FBG4 lay respectively at unit under test 12 fourth class office circumferentially, and FBG1, FBG2, FBG3 and FBG4 are pasted on the inwall of unit under test 12 in the axial direction.It should be noted that: for clearly giving expression to the structure of fibre optic strain sensor in Figure 10, drawing the plane structure chart also simultaneously depicting FBG3 outside the FBG3 be pasted on inwall, that is: the figure of this label indication of FBG3 in Figure 10.Then measuring the load function of load by fibre optic strain sensor is Mi=Ci
fBGΔ λ i, wherein, Δ λ i is the wavelength variation values that FBG exports, C
iFBGfor bending moment coefficients.M can be decomposed into along the X-axis of coordinate system and Y-axis owing to acting on the load measuring cross section
xand M
y, the i=x therefore in above-mentioned load function, y.Then in above-mentioned load function, coefficient Ci
fBGcomprise Cx
fBGand Cy
fBG, M
im can be comprised
xand M
y.At known Δ λ i and Ci
fBGprerequisite under, calculate load M by load function
i, wherein, Δ λ i is measured by FBG and obtains, and Cx
fBGand Cy
fBGneed to load the mode of demarcating by scene to obtain.
The mode that current scene loads demarcation can comprise gravity demarcation or outer carrying is demarcated.It is exactly that the moment of flexure utilizing the change of fan part center to realize strain ga(u)ge loads that gravity is demarcated, but is all difficult to Accurate Measurement due to part quality, centre of gravity place, therefore demarcates poor accuracy (being greater than 10%); Outer carry a demarcation and need large tonnage crane and load effect coupling arrangement, site operation difficulty and risk are all very large, and costly, low, the loading direction of efficiency is also difficult to accurately control.
In sum, no matter blower fan load is measured by strain ga(u)ge or fibre optic strain sensor in prior art, strain ga(u)ge and fibre optic strain sensor are all on-the-spot being directly pasted on blower fan, and need scene to demarcate strain ga(u)ge and fibre optic strain sensor, due to the restriction of site technology condition, load loading direction and size in calibration process to be all difficult to accurately control, therefore demarcation degree of accuracy is loaded lower, this results through the on-the-spot coefficient demarcating acquisition that loads and has comparatively big error, cause the load degree of accuracy drawn lower, thus reduce the measuring accuracy of load.
Summary of the invention
The invention provides a kind of measurement mechanism of blower fan load, system and blower fan control system, in order to improve the measuring accuracy of load.
For achieving the above object, the invention provides a kind of measurement mechanism of blower fan load, comprising: proving ring and at least two survey sensors, described proving ring is arranged at the disconnection section of the unit under test of blower fan, and described survey sensor is arranged on described proving ring;
Described survey sensor, for measuring measuring-signal, described measuring-signal is for generating load.
Alternatively, the profile of described proving ring is identical with the profile of described unit under test.
Alternatively, described proving ring is connected by being fixedly connected with mode with described unit under test, and wherein, the mode of being fixedly connected with comprises flange bolt mode, welding manner, riveting method, bonding way or concrete connected mode.
Alternatively, described survey sensor is arranged on the inwall of described proving ring.
Alternatively, the quantity of described survey sensor is four, and these four survey sensors lay respectively at described proving ring fourth class office circumferentially.
Alternatively, described survey sensor comprises sensor sensing element, first sensor link and the second sensor link, described sensor sensing element is between described first sensor link and described second sensor link and be connected with described first sensor link and described second sensor link respectively, described proving ring is provided with the first proving ring link and the second proving ring link, described first proving ring link is connected with described first sensor link, described second proving ring link is connected with described second sensor link.
Alternatively, described sensor sensing element be centrally located on testing section, the a certain cross section of described first sensor link is positioned on the first end face cross section, the a certain cross section of described second sensor link is positioned on the second end face cross section, and described first end face cross section and described second end face cross section are positioned at the both sides of described testing section and are oppositely arranged.
Alternatively, described measuring-signal comprises: displacement signal or load signal.
Alternatively, described unit under test comprises blade or pylon.
For achieving the above object, present invention also offers a kind of measuring system of blower fan load, comprise: the measurement mechanism of blower fan load and data processing module, the measurement mechanism of described blower fan load comprises: proving ring and at least two survey sensors, described proving ring is arranged on the unit under test of blower fan, and described survey sensor is arranged on described proving ring;
Described survey sensor, for measuring measuring-signal, and exports described measuring-signal to described data processing module;
Described data processing module, for generating load according to described measuring-signal.
For achieving the above object, present invention also offers a kind of blower fan control system, comprising: the measuring system of blower fan load and master controller, the measuring system of blower fan load comprises measurement mechanism and the data processing module of blower fan load;
The measurement mechanism of described blower fan load, for measuring measuring-signal, and exports described measuring-signal to described data processing module;
Described data processing module, for generating load according to described measuring-signal, and exports described load to described master controller;
Described master controller, for controlling blower fan according to described load.
Alternatively, described blower fan control system also comprises state monitoring module, and the measuring system of described blower fan load also comprises data-interface, and described state monitoring module is connected with described data processing module by data-interface;
Described data processing module is also for exporting described load to described state monitoring module by described data-interface;
Described state monitoring module, for monitoring described blower fan according to described load.
The present invention has following beneficial effect:
In technical scheme provided by the invention, the measurement mechanism of blower fan load comprises proving ring and survey sensor, proving ring is arranged at the disconnection section of the unit under test of blower fan, survey sensor is arranged on proving ring and measures measuring-signal, this measuring-signal is for generating load, because survey sensor is arranged on proving ring in the present invention, and non-immediate is pasted on blower fan, therefore this measurement mechanism can complete in laboratory to load and demarcate, and carry out loading demarcation without the need to scene, improve the degree of accuracy loading and demarcate, thus improve the measuring accuracy of load.
Accompanying drawing explanation
The structural representation of the measurement mechanism of a kind of blower fan load that Fig. 1 provides for the embodiment of the present invention one;
Fig. 2 be in Fig. 1 A-A to cut-open view;
Fig. 3 is the floor map of bending-type survey sensor in the present embodiment;
Fig. 4 a is the floor map of bending-type survey sensor in the present embodiment;
Fig. 4 b is the distortion schematic diagram of bending-type survey sensor in Fig. 4 a;
The structural representation of the measurement mechanism of a kind of blower fan load that Fig. 5 provides for the embodiment of the present invention two;
The structural representation of a kind of blower fan control system that Fig. 6 provides for the embodiment of the present invention four;
Fig. 7 is the application schematic diagram of strain ga(u)ge in prior art;
Fig. 8 be in Fig. 7 B-B to cut-open view;
Fig. 9 is the schematic diagram that in Fig. 7, strain ga(u)ge carries out load measurement by full-bridge or half-bridge;
Figure 10 is the application schematic diagram that in prior art, fibre strain becomes sensor;
Figure 11 be in Figure 10 C-C to cut-open view.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with accompanying drawing, the measurement mechanism of blower fan load provided by the invention, system and blower fan control system are described in detail.
The structural representation of the measurement mechanism of a kind of blower fan load that Fig. 1 provides for the embodiment of the present invention one, Fig. 2 be in Fig. 1 A-A to cut-open view, Fig. 3 is the application schematic diagram of the airborne lotus of Fig. 1 apoplexy, as shown in Figure 1, Figure 2 and Figure 3, the measurement mechanism of this blower fan load comprises: proving ring 5 and at least two survey sensors, proving ring 5 is arranged on the disconnection cross section of the unit under test 15 of blower fan, and survey sensor is arranged on proving ring 5.Survey sensor is used for measuring measuring-signal, and this measuring-signal can be used for generating load.
Particularly, can this measuring-signal be exported to data processing module, generate load for data processing module according to measuring-signal.
When needing to carry out the measurement of load to a certain cross section of unit under test 15, unit under test 15 can be disconnected from this section, the cross section that unit under test 15 disconnects is off cross section, now as shown in Figure 3, unit under test 15 is broken as two parts from disconnection section, and proving ring 5 is arranged between two parts unit under test 15 of being disconnected, namely proving ring 5 is arranged at the disconnection section of unit under test 15.Wherein, the arbitrary section that cross section can be unit under test 15 is disconnected.When proving ring 5 is arranged at the disconnection cross section of unit under test 15, the effect connected by two parts unit under test 15 of disconnection can be played simultaneously, thus make this proving ring 5 become unit under test 15 part of the whole.Proving ring 5 is connected by being fixedly connected with mode with unit under test 15, and wherein, the mode of being fixedly connected with comprises welding manner, riveting method, bonding way or concrete connected mode.In other words, proving ring 5 is connected by welding manner, riveting method, bonding way or concrete connected mode with unit under test 15.Above-mentioned welding manner, riveting method, bonding way are with concrete connected mode the mode of being fixedly connected with, thus can make proving ring 5 firmly and be arranged at reliably on unit under test.In above-mentioned connected mode, riveting method and bonding way are the mode of removably connecting, thus can conveniently dismantle proving ring 5.
The profile of proving ring 5 is identical with the profile of unit under test 15, and in other words, the profile of proving ring 5 and the profile of unit under test 15 match, thus make proving ring 5 can be installed on the disconnection section of unit under test 15.Such as: when unit under test 15 is tubular structure, that is, when the cross section of unit under test 15 is circular, for coordinating the profile of unit under test 15, proving ring 5 can be annulus, the profile of such proving ring 5 is identical with the profile of unit under test 15, thus makes the profile of proving ring 5 identical with the profile of unit under test 15.And the size in the size in proving ring 5 cross section and the disconnection cross section of unit under test 15 matches, so that proving ring 5 can be installed on the disconnection section of unit under test 15 more accurately.Wherein, unit under test 15 can comprise blade or pylon.When needing the load measuring blade, proving ring 5 can be installed on the disconnection section of blade; When needing the load measuring pylon, proving ring 5 can be installed on the disconnection section of pylon.
On the inwall that survey sensor can be arranged at proving ring 5 or outer wall.In the present embodiment, preferably, survey sensor is arranged on the inwall of proving ring 5.As shown in Figure 2, the quantity of survey sensor is preferably four and four survey sensors lay respectively at proving ring 5 fourth class office circumferentially.Wherein, four survey sensors are respectively survey sensor 1, survey sensor 2, survey sensor 3 and survey sensor 4, and survey sensor 1, survey sensor 2, survey sensor 3 and survey sensor 4 lay respectively at proving ring 5 fourth class office circumferentially.For clearly indicating the position of four survey sensors, draw coordinate system in fig. 2, wherein, the true origin 0 of X-axis and Y-axis be positioned at proving ring 5 circle centre position, survey sensor 1 and survey sensor 3 are oppositely arranged and are all positioned in X-axis, and survey sensor 2 and survey sensor 4 are oppositely arranged and are all positioned in Y-axis.In actual applications, the quantity of survey sensor is not limited to 4 and can also adopts other any amount being greater than 2, and the position of survey sensor on proving ring 5 also can be arranged arbitrarily, and uniform or non-equal mode for cloth can be adopted to be arranged on proving ring 5.Preferably demand fulfillment interchange assemble principle between demand fulfillment registration and survey sensor between survey sensor and proving ring, thus make survey sensor realize load to decompose decoupling zero along coordinate system X-axis and Y-axis and accurately measure.
Be described in detail for the connected mode of survey sensor 1 to the concrete structure of survey sensor and survey sensor and proving ring below.Survey sensor 1 comprises sensor sensing element 6, first sensor link 7 and the second sensor link 8, sensor sensing element 6 between first sensor link 7 and the second sensor link 8 and sensor sensing element 6 be connected with first sensor link 7 and the second sensor link 8 respectively.Proving ring 5 is provided with the first proving ring link 9 and the second proving ring link 10, preferably, the first proving ring link 9, second proving ring link 10 is one-body molded with proving ring 5.In Fig. 1 to Fig. 3, the first proving ring link 9 and the second proving ring link 10 are all arranged on the inwall of proving ring 5.In actual applications, if when survey sensor can be arranged on the outer wall of proving ring 5, the first proving ring link 9 and the second proving ring link 10 are all arranged on the outer wall of proving ring 5, and this kind of situation no longer specifically draws.First proving ring link 9 is connected with first sensor link 7, and the second proving ring link 10 is connected with the second sensor link 8.In the present embodiment, first proving ring link 9 and first sensor link 7 realize machinery by the mode of machining and are fixedly connected with, particularly, the first proving ring link 9 and first sensor link 7 position by accurate positioning device and to be bolted or the mode such as riveted joint carries out dismountable being fixedly connected with; The mode that second proving ring link 10 is fixedly connected with by machinery with the second sensor link 8 is connected, particularly, the second proving ring link 10 and the second sensor link 8 position by accurate positioning device and to be bolted or the mode such as riveted joint carries out dismountable being fixedly connected with.Alternatively, first proving ring link 9 and first sensor link 7 are also connected by welding or the reliable connected mode such as bonding, and the second proving ring link 10 and the second sensor link 8 are connected by welding or the reliable connected mode such as bonding.In the present embodiment, the concrete structure of all the other survey sensors and survey sensor all identical with survey sensor 1 with the connected mode of proving ring, describe no longer one by one herein.Wherein, when the first proving ring link 9 is connected by dismountable mode that is fixedly connected with first sensor link 7, and second proving ring link 10 and the second sensor link 8 by dismountable be fixedly connected with mode be connected time, when the survey sensor that proving ring 5 is installed goes wrong, can change survey sensor easily, without the need to changing whole measurement mechanism.
As shown in figures 1 and 3, on the testing section be centrally located at of sensor sensing element 6, the a certain cross section of first sensor link 7 is positioned on the first end face cross section, the a certain cross section of the second sensor link 8 is positioned on the second end face cross section, and the first end face cross section and the second end face cross section are positioned at the both sides of testing section and are oppositely arranged.In the present embodiment, proving ring 5 can transmit the load of unit under test 15, survey sensor draws measuring-signal by the relative displacement change of measuring between the first end face cross section and the second end face cross section, in other words, survey sensor draws measuring-signal by the relative displacement change of measuring in the middle of first sensor link 7 and the second sensor link 8.In the present embodiment, measuring-signal can comprise: displacement signal or load signal.
Carry out in the process measured at survey sensor, the sensor sensing element 6 in survey sensor can deform, and the mode of its distortion comprises tension and compression, bends, reverses or its combination in any.Correspondingly, according to the difference of sensor sensing element 6 mode of texturing, survey sensor can comprise drawing and pressing type survey sensor, bending-type survey sensor or torsional mode survey sensor.If measuring-signal is displacement signal, survey sensor can measure displacement or distortion; If when measuring-signal is load signal, survey sensor can measure the load such as tension and compression, bending or torsion.Be described in detail for the deformation process of bending-type survey sensor to survey sensor below by Fig. 4 a and Fig. 4 b.Fig. 4 a is the floor map of bending-type survey sensor in the present embodiment, and Fig. 4 b is the distortion schematic diagram of bending-type survey sensor in Fig. 4 a.As shown in fig. 4 a, relative displacement change does not occur between first sensor link 7 and the second sensor link 8, and therefore sensor sensing element 6 does not deform.As shown in Figure 4 b, there occurs relative displacement change between first sensor link 7 and the second sensor link 8, therefore sensor sensing element 6 there occurs flexural deformation.
In the present embodiment, data processing module can adopt data processing module original in blower fan, or also can be the data processing module arranged separately for realizing measurement this function of load.Data processing module, after the measuring-signal receiving survey sensor output, can carry out computing to this measuring-signal and generate load.This load can comprise: X-axis load and Y-axis load.According to the orthogonality principle of power, the load M of unit under test can be acted on
xyx-axis load M is resolved into along coordinate system (with reference to GL specification)
xwith Y-axis load M
y, M
y=M
xysin θ, M
x=M
xycos θ, wherein, θ is the angle between moment of flexure direction and X-axis.
Particularly, data processing module can carry out computing generation load according to load function formula to measuring-signal.Comprise four survey sensors for the measurement mechanism of the airborne lotus of the present embodiment apoplexy, load function formula can be:
, wherein, near the stress of proving ring 5 inwall at survey sensor position place
d
ofor the external diameter of proving ring 5, D
ifor the internal diameter of proving ring 5, E is the elastic modulus of proving ring material; Wherein, the distortion δ of survey sensor
i=L ε
im, (i=1,2,3,4), L is the distance between the first end face cross section and the second end face cross section, and m revises constant for distortion, and the certainty factors such as this distortion correction constant and survey sensor rigidity, coupling stiffness are relevant; Wherein, U
ioutfor the output signal of survey sensor, sen
ifor the physical descriptor of sensor sensing element, (i=1,2,3,4), as acquisition U
iouttime, by following formula U
iout=kSen
icalculate sen
i, wherein, k is sensor sensitivity factor; Kx and ky is coefficient function, and this coefficient function can room loading demarcation acquisition by experiment in advance.In the present embodiment, the physical descriptor of the sensor sensitive element can comprise strain, displacement or piezoelectricity etc.
In the present embodiment, after data processing module receives measuring-signal, need first to carry out analog to digital conversion to measuring-signal, the measuring-signal of simulation is converted to the measuring-signal of numeral, then again process is carried out to measuring-signal and generate load.
Further, the load of generation can also be exported to the master controller of blower fan by data processing module, is controlled according to load by master controller to blower fan, wherein controls specifically can comprise to carry out independent feathering control and security control etc. to blower fan.The load that data processing module generates is digital signal, then needed to carry out digital-to-analog conversion to load before exporting load to master controller, the load transfer of numeral is become the load of simulation, then exports the load of simulation to master controller.
Further, load can also be exported to the state monitoring module of blower fan by data processing module by data-interface, according to load, blower fan is monitored by state detection module, wherein the load and life-span etc. that specifically can comprise blower fan are monitored to blower fan and monitor.
The measurement mechanism of the blower fan load that the present embodiment provides comprises proving ring and survey sensor, proving ring is arranged at the disconnection section of the unit under test of blower fan, survey sensor to be arranged on proving ring and to measure measuring-signal, this measuring-signal is for generating load, because survey sensor is arranged on proving ring in the present embodiment, and non-immediate is pasted on blower fan, therefore this measurement mechanism can complete in laboratory to load and demarcate, and carry out loading demarcation without the need to scene, improve the degree of accuracy loading and demarcate, thus improve the measuring accuracy of load.Proving ring is responsible for transmitting the load of blower fan, and survey sensor is responsible for measuring deformation measurement, thus makes the measurement mechanism of the present embodiment achieve carrying to be separated with measurement.Degree of accuracy is demarcated in survey sensor degree of accuracy in the present embodiment and loading all can reach 0.1%, thus can obtain higher survey sensor degree of accuracy by the scheme of the present embodiment and load demarcation degree of accuracy.In the present embodiment, the measuring accuracy of load can reach 1% to 3%, is compared with in the of 20%, is greatly improved with the measuring accuracy of load in prior art.Survey sensor is directly installed on proving ring, pastes and on-site proving without the need to scene, and install simple and fast, installation period is short, and assembled in situ is easy, efficiency of assembling and assembly quality high.Interchange assemble requirement is met between survey sensor, this survey sensor is changed if only need when a certain survey sensor breaks down, without the need to changing whole measurement mechanism, and without the need to carrying out on-site proving to the new survey sensor changed, thus the cost reducing measurement mechanism and the maintenance difficulties that reduces measurement mechanism make measurement mechanism easy care.In the present embodiment, survey sensor is connected by mechanical connection manner with proving ring, ensure that the fastness between survey sensor and proving ring, avoid survey sensor and drift about, thus make this measurement mechanism can draw accurate measurement result in severe site environment.In the present embodiment, the Renewal process of survey sensor is comparatively simple, therefore can without the need to professional to on-the-spot during replacing survey sensor.Measurement mechanism better working stability in the present embodiment, the load that therefore this measurement mechanism is measured can be used for controlling blower fan and carrying out status monitoring to blower fan.
The structural representation of the measurement mechanism of a kind of blower fan load that Fig. 5 provides for the embodiment of the present invention two, as shown in Figure 5, the present embodiment is with the difference of above-described embodiment one: in the present embodiment, proving ring 5 is connected by flange bolt mode with unit under test (specifically not drawing in figure), then the measurement mechanism of this blower fan load also comprises flange 11, and flange 11 is connected with unit under test.Particularly, the two ends of proving ring 5 are provided with protuberance 12, flange 11 offers at least one flange screw 13, protuberance 12 offers the protuberance screw 14 corresponding with flange screw 13, the quantity of protuberance screw 14 is identical with the quantity of flange screw 13, bolt is fit into flange screw 13 to be connected with proving ring 5 to make flange 11 with protuberance screw 14, thus proving ring 5 is connected by flange 11 with unit under test 15.
In the present embodiment, proving ring and unit under test are by Flange joint, make proving ring firmly and be fixed on the inwall of unit under test reliably, and to adopt Flange joint conveniently to dismantle proving ring.
The invention process three additionally provides a kind of measuring system of blower fan load, this measuring system comprises: the measurement mechanism of blower fan load and data processing module, the measurement mechanism of described blower fan load comprises: proving ring and at least two survey sensors, described proving ring is arranged on the unit under test of blower fan, and described survey sensor is arranged on described proving ring.Described survey sensor, for measuring measuring-signal, and exports described measuring-signal to described data processing module; Described data processing module, for generating load according to described measuring-signal.
Wherein, the measurement mechanism of the blower fan load that the measurement mechanism of blower fan load can adopt above-described embodiment one or embodiment two to provide, repeats no more herein.
The structural representation of a kind of blower fan control system that Fig. 6 provides for the embodiment of the present invention four, as shown in Figure 6, this blower fan control system comprises: the measuring system 101 of blower fan load and primary controller 102.The measuring system 101 of blower fan load can comprise: the measurement mechanism 103 of blower fan load and data processing module 104.The measurement mechanism 103 of blower fan load for measuring measuring-signal, and exports this measuring-signal to data processing module 104; Data processing module 104 for generating load according to measuring-signal, and exports load to primary controller 102; Master controller 102 is for controlling blower fan according to load.Wherein, control specifically can comprise to blower fan: carry out independent feathering control and security control etc. to blower fan.
In the present embodiment, after data processing module 104 receives measuring-signal, need first to carry out analog to digital conversion to measuring-signal, the measuring-signal of simulation is converted to the measuring-signal of numeral, then again process is carried out to measuring-signal and generate load.The load that data processing module 104 generates is digital signal, then needed to carry out digital-to-analog conversion to load before exporting load to master controller 102, the load transfer of numeral is become the load of simulation, then exports the load of simulation to master controller 102.
In the present embodiment, to the measurement mechanism of the blower fan load that the measurement mechanism of blower fan load can adopt above-described embodiment one or embodiment two to provide, repeat no more herein.
Further, blower fan control system can also comprise state monitoring module 105, and the measuring system of blower fan load also comprises data-interface 106, and state monitoring module 105 is connected with data processing module 104 by data-interface 106.Data processing module 104 is also for exporting load to state monitoring module 105 by data-interface 106; State monitoring module 105 is for monitoring blower fan according to load.Wherein, carry out monitoring comprising to blower fan the load of blower fan and life-span etc. are monitored.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (12)
1. a measurement mechanism for blower fan load, is characterized in that, comprising: proving ring and at least two survey sensors, and described proving ring is arranged at the disconnection section of the unit under test of blower fan, and described survey sensor is arranged on described proving ring;
Described survey sensor, for measuring measuring-signal, described measuring-signal is for generating load.
2. the measurement mechanism of blower fan load according to claim 1, is characterized in that, the profile of described proving ring is identical with the profile of described unit under test.
3. the measurement mechanism of blower fan load according to claim 1, it is characterized in that, described proving ring is connected by being fixedly connected with mode with described unit under test, and wherein, the mode of being fixedly connected with comprises flange bolt mode, welding manner, riveting method, bonding way or concrete connected mode.
4. the measurement mechanism of blower fan load according to claim 1, is characterized in that, described survey sensor is arranged on the inwall of described proving ring.
5. the measurement mechanism of blower fan load according to claim 4, is characterized in that, the quantity of described survey sensor is four, and these four survey sensors lay respectively at described proving ring fourth class office circumferentially.
6. the measurement mechanism of blower fan load according to claim 4, it is characterized in that, described survey sensor comprises sensor sensing element, first sensor link and the second sensor link, described sensor sensing element is between described first sensor link and described second sensor link and be connected with described first sensor link and described second sensor link respectively, described proving ring is provided with the first proving ring link and the second proving ring link, described first proving ring link is connected with described first sensor link, described second proving ring link is connected with described second sensor link.
7. the measurement mechanism of blower fan load according to claim 6, it is characterized in that, described sensor sensing element be centrally located on testing section, the a certain cross section of described first sensor link is positioned on the first end face cross section, the a certain cross section of described second sensor link is positioned on the second end face cross section, and described first end face cross section and described second end face cross section are positioned at the both sides of described testing section and are oppositely arranged.
8. the measurement mechanism of blower fan load according to claim 1, is characterized in that, described measuring-signal comprises: displacement signal or load signal.
9., according to the measurement mechanism of the arbitrary described blower fan load of claim 1 to 8, it is characterized in that, described unit under test comprises blade or pylon.
10. the measuring system of a blower fan load, it is characterized in that, comprise: the measurement mechanism of blower fan load and data processing module, the measurement mechanism of described blower fan load comprises: proving ring and at least two survey sensors, described proving ring is arranged on the disconnection cross section of the unit under test of blower fan, and described survey sensor is arranged on described proving ring;
Described survey sensor, for measuring measuring-signal, and exports described measuring-signal to described data processing module;
Described data processing module, for generating load according to described measuring-signal.
11. 1 kinds of blower fan control systems, it is characterized in that, comprise: the measuring system of blower fan load and master controller, the measuring system of blower fan load comprises measurement mechanism and the data processing module of blower fan load, wherein, the measurement mechanism of described blower fan load adopts the measurement mechanism of any one blower fan load in claim 1-9;
The measurement mechanism of described blower fan load, for measuring measuring-signal, and exports described measuring-signal to described data processing module;
Described data processing module, for generating load according to described measuring-signal, and exports described load to described master controller;
Described master controller, for controlling blower fan according to described load.
12. blower fan control systems according to claim 11, it is characterized in that, described blower fan control system also comprises state monitoring module, and the measuring system of described blower fan load also comprises data-interface, and described state monitoring module is connected with described data processing module by data-interface;
Described data processing module is also for exporting described load to described state monitoring module by described data-interface;
Described state monitoring module, for monitoring described blower fan according to described load.
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| CN108267264B (en) * | 2016-12-31 | 2019-12-13 | 北京金风科创风电设备有限公司 | Method, device and equipment for calibrating fiber grating sensor of fan blade |
| CN106931872A (en) * | 2017-04-27 | 2017-07-07 | 三重型能源装备有限公司 | A kind of blower fan tower barrel of monitoring is tumbled the system and method for load |
| CN107228621A (en) * | 2017-06-08 | 2017-10-03 | 重庆腾毅兴精密电子有限公司 | A kind of voice coil motor swing detecting device and its method |
| CN109653945B (en) * | 2017-10-12 | 2021-08-06 | 中车株洲电力机车研究所有限公司 | Load reduction method and system for wind generating set |
| CN108590984B (en) * | 2018-04-04 | 2020-05-26 | 浙江运达风电股份有限公司 | Method and device for monitoring blade load of wind generating set |
| CN109185073A (en) * | 2018-07-27 | 2019-01-11 | 江苏科技大学 | A kind of the wind load loading experimental apparatus and application method of marine floating type blower |
| CN112284455A (en) * | 2020-10-29 | 2021-01-29 | 陕西中科启航科技有限公司 | High-precision blade root load and frequency measurement method |
| CN112665766B (en) * | 2020-12-19 | 2022-07-19 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Wind turbine blade load measuring method based on FBG and application |
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| EP2354543B1 (en) * | 2010-01-29 | 2015-10-28 | Siemens Aktiengesellschaft | Method of attaching a load sensor to a surface of a rotor blade and rotor blade |
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