CN207036310U - Pump-storage generator closure stud load-bearing monitor device - Google Patents
Pump-storage generator closure stud load-bearing monitor device Download PDFInfo
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- CN207036310U CN207036310U CN201720723828.9U CN201720723828U CN207036310U CN 207036310 U CN207036310 U CN 207036310U CN 201720723828 U CN201720723828 U CN 201720723828U CN 207036310 U CN207036310 U CN 207036310U
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- 230000000052 comparative effect Effects 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000005856 abnormality Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 6
- 239000011888 foil Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000003862 health status Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model provides a kind of pump-storage generator closure stud load-bearing monitor device, including：Piezoelectric force transducer, signal regulating device, comparator；Wherein, the piezoelectric force transducer is set on closure stud；The piezoelectric force transducer is connected with the signal regulating device；The signal regulating device is connected with the comparator；The piezoelectric force transducer measures the stress value of closure stud in real time；The stress value of the closure stud is converted into by force signal by the signal regulating device；The comparator by it is described by force signal with prestore compared with by force signal, output be used for determine closure stud abnormality comparative result.Because the program can directly measure by piezoelectric force transducer the stress value of closure stud, so as to be monitored to pump-storage generator closure stud stress, the piezoelectric force transducer is without additional designs and temperature drift is not present, and can improve accuracy of measurement.
Description
Technical field
Electric power monitoring technical field is the utility model is related to, more particularly to a kind of pump-storage generator closure stud stress prison
Survey device.
Background technology
Dump energy (is converted into mechanical energy in electric load low ebb, lower storehouse water is evacuated to upper water by pump-storage generator
Storehouse；In electric load peak period by discharging water the generating power and pumping water device that the potential energy of upper storehouse water is electric energy) it is swift in response, transports
Line mode is flexible, has peak regulation, Fill valley, frequency modulation, phase modulation, emergency episode standby in power system and the multiple functions such as black starting-up,
Important function has been played for the safety and stability and economical operation of power network.In addition, randomness, intermittent new energy are developed on a large scale
Hydroenergy storage station is needed to be dissolved and be stored.This allows for hydroenergy storage station and has welcome good opportunity to develop.Closely
Nian Lai, the speed of Construction of Pumped Storage Power Station are accelerated, and are grinding, are setting, in the hydroenergy storage station total quantity built and run and always
Unit quantity constantly expands.
Pump-storage generator have head high with rotating speed it is fast the characteristics of, during unit operation, top cover bears larger water pressure
Dynamic loading, especially transient process, top cover are impacted (as shown in figure 1, certain pump-storage generator removal of load by water hammer pressure ripple
Process), do not fasten if closure stud (bolt that top cover links together with base ring) is connected, fatigue rupture phenomenon or spiral shell be present
Bolt insufficient strength, then it is possible that bolt fracture, top cover are started, it is destroyed so as to pump-storage generator occur, or even water
The major accident of factory building is flooded, causes huge life and property loss.
At present, hydroenergy storage station just develops towards the direction of digital intelligent, and unattended or few man on duty is hair
Open up direction.Therefore, it is highly desirable to carry out stress on-line monitoring to unit critical component top cover connecting bolt.It is existing can profit
Judge the tightening state of nut and bolt with the deformation of the elastic washer in ring cylinder, its measuring principle is as shown in Figure 2：
Fastening force between nut and bolt is measured by the deformation for the test foil gauge being pasted onto on elastic washer.
During tightening bolt, according to the preset signal data for tightening number of turns interval and reading and record test foil gauge and measuring, build
The vertical relation tightened between the number of turns and signal data value, until bolt is fully tightened.When the signal number that test foil gauge measures
During according to less than default threshold value (bolt is fully tightened 0.8~0.9 times of corresponding signal data), it is believed that the tightening state of nut
It there is a problem.
Had the following disadvantages using this method：(1) test foil gauge strain with it is bolt strained can not establish it is direct corresponding
Relation, it is impossible to according to the strain of test foil gauge come the stressing conditions of monitoring bolt.(2) fastening bolt is in annulated column body elasticity
Packing ring needs additional designs to process, and can increase more processing cost.(3) temperature at top cover of waterwheel room round the clock, season of summer and winter
Change greatly, measuring strain sector-meeting produces temperature drift, so as to influence accuracy of measurement.
Utility model content
The utility model embodiment provides a kind of pump-storage generator closure stud load-bearing monitor device, using piezoelectric type
Force snesor can directly measure the stress value of closure stud, so as to be supervised to pump-storage generator closure stud stress
Survey, the piezoelectric force transducer is without additional designs and temperature drift is not present, and can improve accuracy of measurement.The pump-storage generator
Closure stud load-bearing monitor device includes：Piezoelectric force transducer, signal regulating device, comparator；
Wherein, the piezoelectric force transducer is set on closure stud；The piezoelectric force transducer and the signal
Conditioning device connects；The signal regulating device is connected with the comparator；
The piezoelectric force transducer measures the stress value of closure stud in real time；
The stress value of the closure stud is converted into by force signal by the signal regulating device；
The comparator by it is described by force signal with prestore compared with by force signal, output be used for determine closure stud
Abnormality comparative result.
In one embodiment, in addition to：The warning device being connected with the comparator；
The comparator is additionally operable to：When it is described by force signal be more than prestore by force signal when, the comparative result is defeated
Go out to the warning device；
The warning device is used for：The comparative result is received, alarm signal is sent according to the comparative result.
In one embodiment, the warning device is phonetic alarm device or buzzer.
In one embodiment, the piezoelectric force transducer is additionally operable to：Measure closure stud twisting in rundown process
Clamp force.
In one embodiment, in addition to：The display device being connected with the piezoelectric force transducer；
The display device shows the stress value of the closure stud and the screwing force.
In the utility model embodiment, top cover is measured by the piezoelectric force transducer being set on closure stud in real time
The stress value of bolt；By the signal regulating device that is connected with piezoelectric force transducer by the stress value of closure stud be converted into by
Force signal；By the comparator that is connected with signal regulating device by it is described by force signal with prestoring compared with by force signal,
The comparative result of output is used for determining the abnormality of closure stud.Compared with prior art, the utility model is using pressure
Electric-type force snesor can directly measure the stress value of closure stud, so as to enter to pump-storage generator closure stud stress
Row monitoring, the piezoelectric force transducer is without additional designs and temperature drift is not present, and can improve accuracy of measurement.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is wattful power when certain a kind of pump-storage generator that the utility model embodiment provides gets rid of 100% rated load
Rate, guide vane opening and top cover pressure time domain beamformer；
Fig. 2 is a kind of nut and bolt tightening state monitoring method schematic diagram that the utility model embodiment provides；
Fig. 3 is that a kind of pump-storage generator closure stud load-bearing monitor apparatus structure that the utility model embodiment provides shows
It is intended to.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the utility model protection.
In the utility model embodiment, there is provided a kind of pump-storage generator closure stud load-bearing monitor device, such as Fig. 3
Shown, the device includes：Piezoelectric force transducer 1, signal regulating device 2, comparator 3.Wherein, closure stud 4 connects top cover 5
With base ring 6；Piezoelectric force transducer 1 is set on closure stud 4, a bullet between piezoelectric force transducer 1 and top cover 5 be present
Property pad 7；Piezoelectric force transducer 1 is connected with signal regulating device 2 by signal wire 8；Signal regulating device 2 and comparator 3
Connection.Piezoelectric force transducer 1 is used for the stress value for measuring closure stud in real time；Signal regulating device 2 is used for the top cover
The stress value of bolt is converted into by force signal；Comparator 3 by it is described by force signal with prestore compared with by force signal, export
For determining the comparative result of the abnormality of closure stud.Wherein, it is described by force signal can be voltage signal or
Current signal.
Wherein, when pump-storage generator closure stud load-bearing monitor device is assembled on pump-storage generator for the first time,
The stress numerical value of closure stud of the pump-storage generator under each operating condition now is obtained, and the stress numerical value is turned
Change into by force signal, using now by force signal as prestoring by force signal, prestore be closure stud by force signal by
The health status model of power.In one section of pump-storage generator closure stud load-bearing monitor device in pump-storage generator assembling
Between after (such as after half a year), now work really long days, closure stud are possible to that company occurs pump-storage generator
Connect and do not fasten, phenomena such as fatigue rupture phenomenon or bolt strength are inadequate be present, by the measurement in real time of piezoelectric force transducer 1 now
Closure stud stress value.
During closure stud is tightened, tightening for closure stud can also be measured by piezoelectric force transducer 1
Power, the screwing force and the numerical value of piezoelectric force transducer measurement of closure stud are recorded, until closure stud is fully tightened, according to
The numerical value of the screwing force of closure stud and piezoelectric force transducer measurement examines the correctness of whole monitoring device.
When it is implemented, comparator 3 by it is described by force signal with prestore compared with by force signal, output be used for determine
The comparative result of the abnormality of closure stud, is specifically included：When the comparative result is described significantly greater than pre- by force signal
Deposit by force signal when, determine that closure stud is in abnormality；
When the comparative result for it is described by force signal and prestore it is basically identical by force signal when, determine at closure stud
In normal condition.Due to there may be error, therefore the first Time-Frequency Analysis result and the second Time-Frequency Analysis result during analysis
Can not possibly be completely the same, as long as the error between the first Time-Frequency Analysis result and the second Time-Frequency Analysis result is in predetermined model
In enclosing, also just say when the first Time-Frequency Analysis result and the second Time-Frequency Analysis result are basically identical, it is possible to determine top cover
Bolt is in normal condition.
When it is implemented, the pump-storage generator closure stud load-bearing monitor device can also include：It is connected with comparator 3
Warning device；Comparator 3 is additionally operable to：When it is described by force signal be significantly greater than prestore by force signal when, by it is described relatively tie
Fruit is exported to the warning device；Warning device is used for：The comparative result is received, according to the comparative result.Wherein, alarm
Device can be phonetic alarm device, can also use buzzer.
The specifically used method of the device is：
(1) piezoelectric force transducer matched with closure stud is customized；
(2) pump-storage generator closure stud load-bearing monitor device is established；
(3) during closure stud is tightened, screwing force and the piezoelectric force transducer measurement of closure stud are recorded
Numerical value, until closure stud is fully tightened, the numerical value that is measured according to the screwing force of closure stud and piezoelectric force transducer come
Examine the correctness of whole monitoring device；
(4) the stress numerical value of the closure stud under each operating condition of acquisition and recording pump-storage generator, establishes top cover spiral shell
The health status model of bolt stress；
(5) during monitoring device monitoring, if finding the real-time stress value and health status model bias of closure stud
Larger, then alert, prompts closure stud to need to carry out coherence check.
In summary, the utility model proposes pump-storage generator closure stud load-bearing monitor apparatus and method have such as
Lower beneficial effect：
(1) stress value of closure stud can be directly measured using piezoelectric force transducer, so as to water-storage
The stress of unit closure stud is monitored, and judges the stress abnormal conditions of closure stud, can take precautions against such as water logging factory building
Major accident.
(2) without additional designs and temperature drift is not present in the piezoelectric force transducer, can improve accuracy of measurement.
(3) the utility model proposes pump-storage generator closure stud load-bearing monitor apparatus and method can also be applied to
Crucial connecting bolt is needed other fields of load-bearing monitor, be with a wide range of applications.
(4) the utility model proposes pump-storage generator closure stud load-bearing monitor apparatus and method can to draw water store
Can unit development connecting bolt Fatigue Failure Study offer technical data.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model embodiment can have various modifications and variations.It is all in spirit of the present utility model
Within principle, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (5)
- A kind of 1. pump-storage generator closure stud load-bearing monitor device, it is characterised in that including：Piezoelectric force transducer, letter Number conditioning device, comparator；Wherein, the piezoelectric force transducer is set on closure stud；The piezoelectric force transducer and the signal condition Device connects；The signal regulating device is connected with the comparator；The piezoelectric force transducer measures the stress value of closure stud in real time；The stress value of the closure stud is converted into by force signal by the signal regulating device；The comparator by it is described by force signal with prestore compared with by force signal, output be used for determine the different of closure stud The comparative result of normal state.
- 2. pump-storage generator closure stud load-bearing monitor device as claimed in claim 1, it is characterised in that also include：With The warning device of the comparator connection；The comparator is additionally operable to：When it is described by force signal be more than prestore by force signal when, by the comparative result export to The warning device；The warning device is used for：The comparative result is received, alarm signal is sent according to the comparative result.
- 3. pump-storage generator closure stud load-bearing monitor device as claimed in claim 2, it is characterised in that the alarm dress It is set to phonetic alarm device or buzzer.
- 4. pump-storage generator closure stud load-bearing monitor device as claimed in claim 1, it is characterised in that the piezoelectric type Force snesor is additionally operable to：Measure screwing force of the closure stud in rundown process.
- 5. pump-storage generator closure stud load-bearing monitor device as claimed in claim 4, it is characterised in that also include：With The display device of the piezoelectric force transducer connection；The display device shows the stress value of the closure stud and the screwing force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723828.9U CN207036310U (en) | 2017-06-21 | 2017-06-21 | Pump-storage generator closure stud load-bearing monitor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723828.9U CN207036310U (en) | 2017-06-21 | 2017-06-21 | Pump-storage generator closure stud load-bearing monitor device |
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| CN207036310U true CN207036310U (en) | 2018-02-23 |
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| CN201720723828.9U Active CN207036310U (en) | 2017-06-21 | 2017-06-21 | Pump-storage generator closure stud load-bearing monitor device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110660197A (en) * | 2019-09-16 | 2020-01-07 | 国网新源水电有限公司富春江水力发电厂 | Real-time alarm method and system for working condition of water turbine top cover bolt |
| CN111351457A (en) * | 2020-02-21 | 2020-06-30 | 国家电网有限公司 | Method and device for measuring residual elongation of top cover bolt of pumped storage unit |
-
2017
- 2017-06-21 CN CN201720723828.9U patent/CN207036310U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110660197A (en) * | 2019-09-16 | 2020-01-07 | 国网新源水电有限公司富春江水力发电厂 | Real-time alarm method and system for working condition of water turbine top cover bolt |
| CN110660197B (en) * | 2019-09-16 | 2021-07-16 | 国网新源水电有限公司富春江水力发电厂 | Real-time alarm method and system for working condition of water turbine top cover bolt |
| CN111351457A (en) * | 2020-02-21 | 2020-06-30 | 国家电网有限公司 | Method and device for measuring residual elongation of top cover bolt of pumped storage unit |
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