CN206725087U - A kind of pump-storage generator vibration monitor system - Google Patents
A kind of pump-storage generator vibration monitor system Download PDFInfo
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- CN206725087U CN206725087U CN201720507579.XU CN201720507579U CN206725087U CN 206725087 U CN206725087 U CN 206725087U CN 201720507579 U CN201720507579 U CN 201720507579U CN 206725087 U CN206725087 U CN 206725087U
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Abstract
The utility model discloses a kind of pump-storage generator vibration monitor system, and it includes computer, data collecting card is connected with computer；11 displacement type low-frequency velocity sensors and 11 velocity profile low-frequency velocity sensors are connected to by the first signal conditioner and secondary signal conditioner on data collecting card；11 displacement types low-frequency velocity sensor is respectively arranged on the direction of principal axis of XYZ tri- of the direction of principal axis of XYZ tri- of the upper spider of pump-storage generator, the direction of principal axis of XYZ tri- of lower bearing bracket, stator middle part horizontal direction, stator upper vertical direction and top cover, and the set location of 11 velocity profile low-frequency velocity sensors is identical with the set location of 11 displacement type low-frequency velocity sensors.The utility model can not only improve the degree of accuracy of vibration monitoring, additionally it is possible to reduce unit and break down in vibration monitoring is carried out to pump-storage generator.
Description
Technical field
A kind of pump-storage generator vibration monitor system is the utility model is related to, particularly a kind of machine of hydroenergy storage station
Group vibration monitor system.
Background technology
By the end of the end of the year 2016, Wind Power In China adds up installation amount and reaches 1.69 hundred million kilowatts, accounts for the accumulative installation of global wind-powered electricity generation
34.7%, for the first big country of global wind-powered electricity generation installation.With substantial amounts of wind-powered electricity generation, nuclear power equal energy source it is grid-connected, hydroenergy storage station
Adjustment effect is more and more important, and the start and stop of pump-storage generator, varying duty are more frequent so that unit is easier that event occurs
Barrier.To ensure the safe and stable operation of unit, it is necessary to deeply study unit vibration characteristic, entered according to unit vibration characteristic
Row unit is adjusted.
But due to the complicated operating condition of pump-storage generator, its vibration characteristics is than conventional turbine-generator units more
Complexity, existing vibration monitoring method is caused accurately can not comprehensively to monitor the indeed vibrations situation of pump-storage generator (i.e.
Running status), the degree of accuracy of vibration monitoring is undesirable；And then lead to not adjust pump-storage generator well, cause unit
It is easier to break down.Therefore, there is the vibration monitoring degree of accuracy is undesirable for the vibration monitor system of existing pump-storage generator
The problem of being easier to break down with unit.
Utility model content
The purpose of this utility model is, there is provided a kind of pump-storage generator vibration monitor system.The utility model is right
Pump-storage generator is carried out in vibration monitoring, can not only improve the degree of accuracy of vibration monitoring, additionally it is possible to reduces unit and event occurs
The situation of barrier.
The technical solution of the utility model：A kind of pump-storage generator vibration monitor system, including computer, on computer
It is connected with data collecting card；The first signal conditioner and secondary signal conditioner are connected with data collecting card, the first signal is adjusted
11 displacement type low-frequency velocity sensors are connected with reason device, 11 velocity profile low-frequency velocities are connected with secondary signal conditioner
Sensor；11 displacement types low-frequency velocity sensor is respectively arranged at the axle sides of XYZ tri- of the upper spider of pump-storage generator
To, in the middle part of the direction of principal axis of XYZ tri- of lower bearing bracket, stator horizontal direction, stator upper vertical direction and top cover the direction of principal axis of XYZ tri-
On, the set location of 11 velocity profile low-frequency velocity sensors and the set location phase of 11 displacement type low-frequency velocity sensors
Together.
In a kind of foregoing pump-storage generator vibration monitor system, revolution speed sensing is also associated with the data collecting card
Device, speed probe are arranged on the main shaft of pump-storage generator.
In a kind of foregoing pump-storage generator vibration monitor system, water-storage is also associated with the data collecting card
The unit monitoring system of unit.
In a kind of foregoing pump-storage generator vibration monitor system, the displacement type low-frequency velocity sensor is contact
Inertia-type displacement type low-frequency velocity sensor.
In a kind of foregoing pump-storage generator vibration monitor system, velocity profile low-frequency velocity sensor is the used of contact
Property formula velocity profile low-frequency velocity sensor.
In a kind of foregoing pump-storage generator vibration monitor system, the speed probe passes for contactless rotating speed
Sensor.
Compared with prior art, the utility model devises a kind of pump-storage generator vibration monitoring device, by taking out
The direction of principal axis of X, Y, Z tri- of the upper spider of water accumulation of energy unit, the direction of principal axis of X, Y, Z tri- of lower bearing bracket, stator middle part horizontal direction, stator
Totally 11 point positions are provided with displacement type low-frequency velocity sensor to the direction of principal axis of X, Y, Z tri- of upper vertical direction and top cover simultaneously
With velocity profile low-frequency velocity sensor, pass through 11 displacement type low-frequency velocity sensors and 11 velocity profile low-frequency velocity sensors
The vibration signal at 11 measuring points is measured simultaneously；Low and medium frequency vibration signal is detected by displacement type low-frequency velocity sensor, led to
Velocity profile low-frequency velocity sensor detection high frequency vibration signal is crossed, each position on pump-storage generator is gathered comprehensively and shakes
Dynamic signal, and it is special by considering the time domain of vibration displacement signal, the time domain of frequency domain characteristic and vibration velocity signal, frequency domain
Property, the Validity Test to pump-storage generator vibration and analysis can be better achieved, avoid causing a certain frequency range as far as possible
Interior vibration information missing, to obtain the real running status of unit well and to be adjusted, improves vibration monitoring
The degree of accuracy, reduce the situation that unit breaks down.Turn in addition, the utility model is also provided with speed probe to detect main shaft
Speed, and vibration displacement signal and vibration velocity signal are carried out respectively there is provided the first signal conditioner and secondary signal conditioner
Conditioning, while the original unit monitoring system of pump-storage generator is also utilized, the real-time power signal for gathering pump-storage generator,
Guide vane opening signal, upper pond level signal and level of tail water signal, Faults by Vibrating is obtained by computer integrated, main shaft turns
After speed, the power signal of pump-storage generator, guide vane opening signal, upper pond level signal and level of tail water signal, then carry out machine
Group regulation, further reduces the situation that unit breaks down.Therefore, the utility model vibrates to pump-storage generator
In monitoring, the degree of accuracy of vibration monitoring can not only be improved, additionally it is possible to reduce unit and break down.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is principle flow chart of the present utility model；
Fig. 3 is lower bearing bracket X-direction vibration displacement waveform of the present utility model, spectrum diagram；
Fig. 4 is lower bearing bracket X-direction vibration velocity waveform of the present utility model, spectrum diagram.
Mark in accompanying drawing for：1- computers, 2- data collecting cards, the signal conditioners of 3- first, the conditioning of 4- secondary signals
Device, 5- displacement type low-frequency velocity sensors, 6- velocity profile low-frequency velocity sensors, 7- speed probes, 8- unit monitoring systems.
Embodiment
The utility model is further described with reference to embodiment, but is not intended as to the utility model limitation
Foundation.
Embodiment one.A kind of pump-storage generator vibration monitor system, form as shown in figure 1, including computer 1, calculate
Data collecting card 2 is connected with machine 1；The first signal conditioner 3 and secondary signal conditioner 4 are connected with data collecting card 2, the
11 displacement type low-frequency velocity sensors 5 are connected with one signal conditioner 3,11 speed are connected with secondary signal conditioner 4
Degree type low-frequency velocity sensor 6；11 displacement type low-frequency velocities sensor 5 is respectively arranged at the upper machine of pump-storage generator
The direction of principal axis of XYZ tri- of frame, the direction of principal axis of XYZ tri- of lower bearing bracket, horizontal direction in the middle part of stator, stator upper vertical direction and top cover
On the direction of principal axis of XYZ tri-, the set location of 11 velocity profile low-frequency velocity sensors 6 and 11 displacement type low-frequency velocity sensors 5
Set location it is identical.
Speed probe 7 is also associated with the data collecting card 2, speed probe 7 is arranged at pump-storage generator
On main shaft；The unit monitoring system 8 of pump-storage generator is also associated with the data collecting card 2；The displacement type low frequency speed
The inertia-type displacement type low-frequency velocity sensor that sensor 5 is contact is spent, the IN-081 type electricity whirlpool of German Shen gram can be used
Flow sensor；Velocity profile low-frequency velocity sensor 6 is the inertia-type velocity profile low-frequency velocity sensor of contact, can use north
Jing Haoruisi MLS-9 type low-frequency velocity sensors (displacement type)；The speed probe 7 is contactless revolution speed sensing
Device, Beijing Hao Ruisi MLS-9 type low-frequency velocity sensors (velocity profile) can be used.
Speed probe 7 is arranged on the main shaft of pump-storage generator, the pump-storage generator speed of mainshaft that will be collected
Signal is transmitted to computer 1 through data collecting card 2.11-displacement type low-frequency velocity sensor 5 is separately mounted to water-storage
The axle of upper spider three (X-axis, Y-axis, Z axis) direction, the axle of lower bearing bracket three (X-axis, Y-axis, Z axis) direction, the stator middle part of unit are horizontal, fixed
On sub- upper vertical direction and the axle of top cover three (X-axis, Y-axis, Z axis) direction, by the upper spider of the pump-storage generator collected, under
The vibration position signal of frame, stator and top cover inputted in the first signal conditioner 3, and the first signal conditioner 3 will receive
Transmitted after the amplification of vibration displacement signal, filtering through data collecting card 2 to computer 1.11 velocity profile low-frequency velocity sensors 6
Similarly install, be separately mounted to the axle of upper spider three (X-axis, Y-axis, Z axis) direction, the axle of lower bearing bracket three (X-axis, the Y of pump-storage generator
Axle, Z axis) direction, in the middle part of stator on horizontal, stator upper vertical direction and the axle of top cover three (X-axis, Y-axis, Z axis) direction, it will gather
To the upper spider of pump-storage generator, lower bearing bracket, stator and top cover vibration velocity signal input to secondary signal conditioner 4
Interior, the vibration velocity signal received is amplified, transmitted after filtering through data collecting card 2 to computer 1 by secondary signal conditioner 4
It is interior.The pump-storage generator monitoring system 8 used in the utility model for existing device in the prior art, pump-storage generator
Unit monitoring system 8 is by the pump-storage generator power signal obtained in real time, guide vane opening signal, upper pond level signal and downstream
Water level signal, inputted through data collecting card 2 to computer 1.Computer 1 (vibrates the tach signal received, vibration signal
Displacement signal, vibration velocity signal), power signal, guide vane opening signal, upper pond level signal and level of tail water signal, with meter
Preset computation model carries out analysis calculating in calculation machine 1, to realize to pump-storage generator vibration measurement and analysis, according to analysis
As a result unit regulation is carried out.
Embodiment two.Vibration-testing is carried out to pump-storage generator, to obtain vibration characteristics of the unit in different operating modes.
Unit rated speed 375r/min, runner bucket number 9, stator number 20, rated head 447.0m, maximum head 492.27m, most
Small head 420.96m, number of magnetic poles 16.Operating condition of test is respectively：1) pumping operation mode, unit continuous pumpage are synchronous every 30 minutes
Gather unit vibration signal.2) generating operation mode, the load change test of generating operation mode, operating condition of test point have been carried out under test head
Respectively 148MW, 190MW, 230MW, 262MW, 285MW, 300MW, 338MW, 375MW, it is synchronous after operating point to be tested is stable
Gather unit vibration signal.Test measuring point：1) unit duty parameter measuring point includes：Active power, guide vane opening, upper pond level,
The level of tail water, rotating speed.2) unit vibration measuring point includes：Three axles (X-axis, Y-axis, Z axis) direction of upper spider, three axle (X of lower bearing bracket
Axle, Y-axis, Z axis) direction, in the middle part of stator on horizontal, stator upper vertical direction and three axles (X-axis, Y-axis, Z axis) direction of top cover.
Each measuring point lays displacement type low-frequency velocity sensor 5 and the two types sensor of velocity profile low-frequency velocity sensor 6.
The sample frequency selected in the present embodiment is 2000Hz, sampling number 240k.Unit output is 188MW, stator
When aperture 79.4%, gross head 441.7m (gross head=upper pond level-level of tail water), lower bearing bracket X-direction (i.e. X-direction) is shaken
Dynamic displacement signal, lower bearing bracket X-direction (i.e. X-direction) vibration velocity signal waveform, spectrum utilization computer drawing are into figure；From figure
In 3 as can be seen that the major peaks of lower bearing bracket X-direction (i.e. X-direction) vibration displacement signal spectrum to be concentrated mainly on low frequency attached
Closely, at 6.25Hz frequencies, there is 5.973 μm of the peak value of maximum；Figure 4, it is seen that lower bearing bracket X-direction (i.e. X side
To) major peaks of vibration velocity signal spectrum are concentrated mainly on intermediate frequency, near high frequency, at 204.82Hz frequencies, occur most
Big peak value 0.0174mm/s.
As shown in Fig. 2
1) peak-to-peak value of vibration displacement signal is selected as vibration displacement time domain parameter V0；
Now, V0=37.52.
2) frequency spectrum that vibration displacement signal sequence signal is tried to achieve after DFT, choosing are first done to vibration displacement signal
Preceding 5 dominant frequency values maximum in the frequency spectrum are taken as vibration displacement frequency domain parameter V1, i.e. V1=[(f1, F1), (f2, F2), (f3,
F3), (f4, F4), (f5, F5)], wherein the f of (i=1,2,3,4,5)iFor frequency, F corresponding to preceding 5 maximum amplitudes in frequency spectrumiFor
Preceding 5 maximum amplitudes in frequency spectrum, and F1>F2>F3>F4>F5。
Now, V1=[(6.25,5.973), (12.5,0.600), (74.96,0.405), (18.76,0.323),
(50.03,0.313)].Wherein, 6.25Hz is that unit turns frequency, and 12.5Hz is two frequencys multiplication that unit turns frequency, and 74.96 be thrust bearing shoe valve
By frequency, 18.76Hz is the frequency tripling that unit turns frequency, and 50.03Hz is power supply disturbance or electromagnetic frequency.As can be seen that should
Vibration signal mainly reflect unit turn frequency and its frequency multiplication, electromagnetism in terms of characteristic.
3) virtual value of vibration velocity signal is selected as vibration velocity time domain parameter H0。
Now, H0=0.0512.
4) frequency spectrum that vibration velocity signal sequence signal is tried to achieve after DFT, choosing are first done to vibration velocity signal
Preceding 5 dominant frequency values maximum in the frequency spectrum are taken as vibration velocity signal frequency domain parameter, i.e. H1=[(a1, A1), (a2, A2), (a3,
A3), (a4, A4), (a5, A5)], wherein a of (i=1,2,3,4,5)iFor frequency, A corresponding to preceding 5 maximum amplitudes in frequency spectrumiFor
Preceding 5 maximum amplitudes in spectrogram, and A1>A2>A3>A4>A5。
Now, H1=[(204.8,0.01736), (49.98,0.01568), (112.6,0.01326), (199.9,
0.002119), (74.96,0.001875)].Wherein, it is initially believed that to be factory building additional mass the reason for 204.8Hz exciting source
Influence, 49.98Hz is power supply disturbance or electromagnetic frequency, and 112.6 be two frequencys multiplication of blade excessively stream frequency, and 199.9Hz is electricity
Two frequencys multiplication of magnet rate, 74.96 pass through frequency for thrust bearing shoe valve.As can be seen that the vibration signal mainly reflects water-storage
Characteristic in terms of Power Plant, unit waterpower and electromagnetism.
5) Faults by Vibrating is obtained：Consider measuring point vibration displacement characteristic, vibration velocity characteristic, it is total to obtain the measuring point
Faults by Vibrating P=[V0, H0, V1, H1]。
Now, P=[(37.52,0.0512), (6.25,5.973), (12.5,0.600), (74.96,0.405),
(18.76,0.323), (50.03,0.313), (204.8,0.01736), (49.98,0.01568), (112.6,0.01326),
(199.9,0.002119), (74.96,0.001875)].
From P as can be seen that the Faults by Vibrating obtained using the utility model, can obtain the low of vibration signal simultaneously
Frequently, intermediate frequency, high frequency full frequency band feature, the vibration characteristics of unit can preferably be obtained.
(embodiment one, two) in summary, the direction of principal axis of XYZ tri- of the upper spider of pump-storage generator in the utility model,
The direction of principal axis of XYZ tri- of lower bearing bracket is identical with the direction of principal axis of XYZ tri- of top cover, i.e. the three-axis reference of upper spider, three axles of lower bearing bracket
The three-axis reference of coordinate system and top cover is the same coordinate system；Using four machine lines of pump-storage generator as X-axis, unit centre
For the origin of coordinates, and X-axis it is vertical be+Y-axis for Y-axis, upstream, tail water is-Y-axis, and Z axis defers to right-hand rule determination.In Fig. 2
Vibration parameters are vibration parameterses, and time domain parameter includes vibration displacement time domain parameter and vibration velocity time domain parameter, frequency domain
Parameter includes vibration displacement frequency domain parameter and vibration velocity frequency domain parameter；Two " preceding 5 dominant frequency values " are maximum preceding 5 masters
Frequency is worth.
Claims (6)
- A kind of 1. pump-storage generator vibration monitor system, it is characterised in that：Including computer (1), computer is connected with (1) Data collecting card (2)；It is connected with the first signal conditioner (3) and secondary signal conditioner (4) on data collecting card (2), first 11 displacement type low-frequency velocity sensors (5) are connected with signal conditioner (3), secondary signal conditioner is connected with 11 on (4) Individual velocity profile low-frequency velocity sensor (6)；11 displacement type low-frequency velocities sensor (5) is respectively arranged at water-storage machine The direction of principal axis of XYZ tri- of upper spider of group, the direction of principal axis of XYZ tri- of lower bearing bracket, stator middle part horizontal direction, stator upper vertical direction On the direction of principal axis of XYZ tri- of top cover, the set location of 11 velocity profile low-frequency velocity sensors (6) and 11 displacement type low frequency speed The set location for spending sensor (5) is identical.
- A kind of 2. pump-storage generator vibration monitor system according to claim 1, it is characterised in that：The data acquisition Speed probe (7) is also associated with card (2), speed probe (7) is arranged on the main shaft of pump-storage generator.
- A kind of 3. pump-storage generator vibration monitor system according to claim 1, it is characterised in that：The data acquisition The unit monitoring system (8) of pump-storage generator is also associated with card (2).
- A kind of 4. pump-storage generator vibration monitor system according to claim 1, it is characterised in that：The displacement type is low Frequency velocity sensor (5) is the inertia-type displacement type low-frequency velocity sensor of contact.
- A kind of 5. pump-storage generator vibration monitor system according to claim 1, it is characterised in that：Velocity profile low frequency speed Spend the inertia-type velocity profile low-frequency velocity sensor that sensor (6) is contact.
- A kind of 6. pump-storage generator vibration monitor system according to claim 2, it is characterised in that：The revolution speed sensing Device (7) is contactless speed probe.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364449A (en) * | 2018-02-24 | 2018-08-03 | 南方电网调峰调频发电有限公司 | A kind of Hydropower Unit STABILITY MONITORING remote data live transmission method |
| CN109855723A (en) * | 2019-01-16 | 2019-06-07 | 山东理工大学 | A kind of test macro and test method of cavity temperature transmission characteristic curve |
-
2017
- 2017-05-09 CN CN201720507579.XU patent/CN206725087U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364449A (en) * | 2018-02-24 | 2018-08-03 | 南方电网调峰调频发电有限公司 | A kind of Hydropower Unit STABILITY MONITORING remote data live transmission method |
| CN109855723A (en) * | 2019-01-16 | 2019-06-07 | 山东理工大学 | A kind of test macro and test method of cavity temperature transmission characteristic curve |
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