CN104061122B - A kind of belt tension automatic monitoring system and monitoring method and wind turbine pitch-controlled system - Google Patents
A kind of belt tension automatic monitoring system and monitoring method and wind turbine pitch-controlled system Download PDFInfo
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- CN104061122B CN104061122B CN201410306488.0A CN201410306488A CN104061122B CN 104061122 B CN104061122 B CN 104061122B CN 201410306488 A CN201410306488 A CN 201410306488A CN 104061122 B CN104061122 B CN 104061122B
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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 discloses a kind of belt tension automatic monitoring system, data processor that the controller including belt tension detector, controlling belt tension detector start and stop, the data gathering belt tension detector process and alarm, described belt tension detector includes sensor, data acquisition equipment and automatic striking mechanism.The invention also discloses belt tension automatic monitoring method.And disclose in the wind turbine pitch-controlled system that comprises above-mentioned belt tension automatic monitoring system and this system the automatic monitoring method to Timing Belt tension detection.The present invention can be very easy to, with the tension force of online auto monitoring belt, the situation needing remotely to monitor belt running status.The present invention utilizes electric magnet principle and cam structure feature, it is achieved that automatically tap the action of belt, it is to avoid artificial percussion, saves manpower and materials, economical and practical.By the most automatically measuring the duty of Timing Belt in pitch-controlled system of the present invention, greatly reduce the potential safety hazard that Wind turbines exists.
Description
Technical field
The present invention relates to belt tension monitoring technical field, particularly relate to a kind of belt tension and automatically supervise
Examining system and monitoring method and wind turbine pitch-controlled system.
Background technology
Increasingly mature along with wind driven generator technology, various mature technologies and new technique are the most constantly applied
On wind-driven generator.The impeller wheel portion of such as wind-driven generator, traditional control vane propeller-changing angle
Dynamical system be hydraulic drive, along with the development of Timing Belt technology, it is also applied to the change oar of blower fan
In drive system.Toothed belt transmission has gear (synchronous pulley) transmission, Chain conveyer and V belt translation concurrently
Each advantage, it is not necessary to lubrication, slippage is little, pollution-free, and noise is little, compact conformation, smooth running
Feature.
But toothed belt transmission there is also a lot of defect, if adjust improper, easily occur broken teeth, jump tooth
, even there is phenomenon of rupture in phenomenon.Owing to wind load is unstable, and wind power generating set is susceptible to
Vibration, if Timing Belt install and use improper, it is easy to rupture, sideslip and climbing tooth phenomenon.And
And, along with the operation of unit, the Timing Belt caused due to reasons such as Timing Belt deformation and unit vibrations is opened
Power changes, and all can cause serious consequence.On large-scale wind driven generator unit, the most not for
The condition detecting system of the pitch-controlled system that Timing Belt drives.For directly driving unit, blade aerodynamic is stopped
Car is crucial control system, if the pitch drive of three blades all lost efficacy, will bring on a disaster
Property consequence.Even if the Timing Belt of a blade damages thus causes pitch drive to lose efficacy, also will be to unit
Equipment brings badly damaged, causes bigger economic loss.
The test of Timing Belt tensile force at present is all to use Portable belt tensiometer (Tension Meter)
Obtain, as visible in accompanying drawing 1, by tapping the Timing Belt 2 of tensioning to make it shake with natural frequency,
The natural frequency of this static state is measured by sensor 1 under the auxiliary of pulsed light wave.The tensioning of Timing Belt
Power is calculated by formula below: T=4 × m × L2×f2
T=belt tension, unit: N
M=belt line weight, unit: kg/m
The Belt Length of the non-canned paragraph of L=, unit: m
The belt natural frequency of the non-canned paragraph of f=, unit: Hz
It is that engineer arrives at wind that present stage is applied to the Timing Belt tension test of pitch system of wind driven generator
Manual directly test in machine, the method is firstly the need of out of service by blower fan, and locks impeller, test
Personnel enter impeller internal and just can operate.It addition, the method can not accomplish long-term measurement in real time,
And affected by test condition, the most likely cannot arrive at blower fan, especially
Being marine wind electric field, the time window arriving at blower fan is more limited by, it is impossible to complete test according to plan.
As can be seen here, above-mentioned existing belt tension instrument is in structure, method and use, it is clear that still deposit
There are being inconvenience and defect, and are urgently being further improved.How to found one and can realize on-line monitoring
And facilitate feasible a kind of belt tension automatic monitoring system, become the target that current industry pole need to be improved.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind of can realize on-line monitoring and facilitate feasible skin
Belt tension automatic monitoring system so that it is the running status of belt can be monitored in real time, thus overcome existing
The deficiency of belt tension instrument.
For solving above-mentioned technical problem, the present invention provides a kind of belt tension automatic monitoring system, including
Belt tension detector, described belt tension detector include sensor for detecting belt vibration and
The data acquisition equipment being connected with sensor, described belt tension automatic monitoring system also includes controlling institute
State the controller of belt tension detector start and stop, the data of described belt tension detector collection are carried out
The data processor processed and the status alert device being connected with data processor, described belt tension is examined
Surveying the automatic striking mechanism that device also includes automatically tapping belt, described automatic striking mechanism is fixed on described
Around belt, described sensor is fixed on above or below described belt.
As further improving, described automatic striking mechanism includes tapping parts and tapping parts driving
Mechanism, described percussion parts are for tapping hammer, and the described hammer that taps is positioned at above or below described belt；
Described percussion member driving mechanism is electric magnet and iron block attracting when being energized with electric magnet, described percussion
When hammer is energized by electric magnet, realize attracting with iron block taps belt；Or, described percussion parts drive
Mechanism is cam and the motor driving cam rotation, and described cam drives the described hammer that taps to send out when rotating
Raw skew and reset, described percussion realizes percussion belt when hammering skew into shape.
Further improving, described data processor is also directly connected with described controller.
Further improving, described belt is Timing Belt.
The present invention also to solve the technical problem that the belt tension being to provide a kind of energy on-line monitoring is supervised automatically
Survey method so that it is the running state real-time monitoring to belt, thus overcome existing belt tension to detect
The deficiency of device.
For solving above-mentioned technical problem, the invention provides the automatic prison of belt tension automatic monitoring system
Survey method, its monitoring step is:
(1) described controller controls the unlatching of described belt tension detector；
(2) the automatic striking mechanism of described belt tension detector taps belt, described sensor automatically
The natural frequency of detection belt, described data acquisition equipment carries out data acquisition, when described data acquisition
After equipment data acquisition, data being exported to described data processor, described controller controls institute
State belt tension detector to quit work；
(3) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；Abnormal data is reported to the police by described status alert device.
As improving further, abnormal data point one-level is changed by above-mentioned steps (3) immediately signal,
Two grades prepare spare part signal, three grades of continuous observation signal processing, described one-level is changed signal immediately and leads to
Cross the alarm equipment alarm of described status alert device, two grades are prepared spare part signal, three grades of continuous observation letters
Number indicated by the display lamp of described status alert device.
Also providing for the belt tension automatic monitoring method of a kind of further improvement, its monitoring step is:
(1) described controller controls the unlatching of described belt tension detector；
(2) the automatic striking mechanism of described belt tension detector taps belt, described sensor automatically
The natural frequency of detection belt, described data acquisition equipment carries out data acquisition, when described data acquisition
After equipment data acquisition, data being exported to described data processor, described controller controls institute
State belt tension detector to quit work；
(3) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；Abnormal data point one-level is changed immediately signal, two grades of preparations standby
Part signal, three grades of continuous observation signal processing, change signal processing step immediately for passing to described one-level
Defeated instruction to described controller, repeat the above steps (1), (2), (3), result be still one-level immediately
The abnormal data of the replacing signal alarm equipment alarm by described status alert device, prepares spare parts to two grades
Signal, three grades of continuous observation signals are indicated by the display lamp of described status alert device.
The present invention also solves the technical problem that being to provide one can realize on-line monitoring Timing Belt running status
Wind turbine pitch-controlled system so that it is the duty of Timing Belt can be monitored in real time, thus overcome existing wind
The deficiency of motor pitch-controlled system.
For solving above-mentioned technical problem, the present invention provides a kind of wind turbine pitch-controlled system, described change oar system
The driving means of system is by toothed belt transmission, and described pitch-controlled system comprises above-mentioned prison real-time to Timing Belt
The belt tension automatic monitoring system surveyed, described controller is connected with the master control system of described wind turbine,
Described belt tension automatic monitoring system comprises three belts the most corresponding with three Timing Belts arranged side by side
Tension detector, described status alert device includes three alarm mechanisms corresponding with three Timing Belts.
Improving further, the data acquisition equipment of described three belt tension detectors merges into one.
The invention also discloses the belt of belt tension automatic monitoring system in above-mentioned wind turbine pitch-controlled system
Tension force automatic monitoring method, monitoring step is:
(1) described controller sends the application monitoring described Timing Belt duty to master control system；
(2) when described master control system is by the application of described controller, Wind turbines is out of service,
Described controller controls described belt tension detector and opens；
(3) the automatic striking mechanism of described belt tension detector taps Timing Belt, described sensing automatically
The natural frequency of device detection Timing Belt, described data acquisition equipment carries out data acquisition, when described data
After collecting device data acquisition, data being exported to described data processor, described controller is removed
Sell to the application of master control system and control described belt tension detector and quit work；
(4) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；To the abnormal data alarm mechanism report by described status alert device
Alert.
Using above-mentioned technical scheme, the present invention at least has the advantage that
(1) inventive belt tension force automatic monitoring system can be with the tension force of online auto monitoring belt, pole
The earth facilitates the situation needing remotely to monitor belt running status.
(2) in the present invention belt tension detector by utilizing electric magnet principle and cam structure feature,
Achieve the action automatically tapping belt, it is to avoid artificial percussion, save manpower and materials, economical real
With.
(3) in pitch system of wind driven generator of the present invention, Timing Belt tension monitoring system is passed through the most automatically
Measure the duty of Timing Belt, adjust the tension force of Timing Belt in time, greatly reduce and use this type of
The potential safety hazard that the wind power generating set of pitch-controlled system exists, improves the reliable of wind-driven generator unit
Property and availability, thus improve the generated energy of wind energy turbine set, reduce O&M cost, add through
Ji benefit.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technology of the present invention
Means, below in conjunction with accompanying drawing, the present invention is described in further detail with detailed description of the invention.
Fig. 1 existing belt tension instrument operation principle schematic diagram；
In Fig. 2 embodiment of the present invention pitch system of wind driven generator, the work of Timing Belt tension monitoring system is former
Reason schematic diagram；
In Fig. 3 embodiment of the present invention pitch system of wind driven generator, belt tension detector is in wheel hub
Structural representation；
Fig. 4 is the reverse side schematic diagram of Fig. 3；
Fig. 5 is the partial enlarged drawing of belt tension detector in Fig. 3；
Fig. 6 is the partial enlarged drawing of belt tension detector in Fig. 4.
Detailed description of the invention
2 to 4 is visible referring to the drawings, one pitch system of wind driven generator of the present invention, wind-driven generator
Pitch-controlled system controls vane propeller-changing angle by Timing Belt 2 transmission.For Timing Belt 2 can be monitored in real time
Duty, this pitch system of wind driven generator includes Timing Belt tension force automatic monitoring system.Synchronize
Belt tension automatic monitoring system includes that Timing Belt tension detector 4, control Timing Belt tension detector 4 open
The data processor that the controller that stops, the data gathering Timing Belt tension detector 4 process with
And the status alert device being connected with data processor.Timing Belt tension detector 4 is used for detecting wheel hub 6
The tension force of the Timing Belt 2 that outside coordinates with pitch variable bearings 7.5 and 6 is visible referring to the drawings, Timing Belt
Tension detector 4 includes being positioned at sensor 1 and the biography sensing Timing Belt frequency of vibration above Timing Belt 2
The data acquisition equipment that sensor 1 connects and the automatic striking mechanism automatically tapping Timing Belt 2.Automatically strike
Hitting mechanism to include tapping parts 3 and tapping member driving mechanism 5, tapping parts 3 is to tap hammer, taps
Member driving mechanism 5 is electric magnet and is positioned at the fixing iron block below electric magnet, taps hammer and electric magnet
Connect and be positioned at the top of Timing Belt 2, when the solenoid is energized electric magnet attracting with iron block below from
And realize tapping hammer and tap Timing Belt 2.Automatically the percussion member driving mechanism 5 of striking mechanism can also be
Cam and the motor of driving cam rotation, when opening motor and driving cam rotation, cam driven taps
There is skew and reset in hammer, taps hammer and Timing Belt 2 occurs to tap during skew, thus complete to tap Timing Belt
The action of 2.Certainly, the sensor probe of sensor 1 and percussion parts 3 can be according to the scenes of Timing Belt 2
Installation situation is positioned at the lower section of Timing Belt 2.Sensor 1 and automatic striking mechanism are all fixed on synchronization
On fixed support with 2 sides.In pitch system of wind driven generator for three blades corresponding three
Bar Timing Belt 2 has three Timing Belt tension detectors 4 arranged side by side.Certainly, three Timing Belt tension force inspections
Surveying data acquisition equipment in device 4 and can merge into one, sensor 1 and automatic striking mechanism are still three
Individual, data acquisition equipment reads the data of three sensor probes in turn, i.e. forms three-channel synchronization
Belt tension detector.
The controller of above-mentioned control Timing Belt tension detector 4 and the master control system communication of wind-driven generator
Connect.Under suitable measurement condition, controller sends monitoring Timing Belt 2 duty to master control system
Application, when master control system by this apply for time, wind power generating set is out of service, and controller sends
Instruction, Timing Belt tension detector 4 starts to be measured the tension force of Timing Belt 2, i.e. Timing Belt tension force
The automatic striking mechanism of detector 4 taps Timing Belt 2 automatically, and sensor 1 detects the intrinsic frequency of Timing Belt 2
Rate, data acquisition equipment is acquired data.Number will be detected after data acquisition equipment data acquisition
According to being transferred to data processor, controller is cancelled and is sent monitoring Timing Belt 2 duty to master control system
Apply for and control Timing Belt tension detector 4 quitting work.
The data classification that data acquisition equipment is transmitted by data processor processes, the data to normal range
The data of three Timing Belt tension force in storage a period of time, line number of going forward side by side exports the most afterwards, exceeds
Data are overflowed automatically；According to the data of long-term experiment, different early warning values can be set, produce difference
Alert levels.Meanwhile, the average gathered according to scheduled store data acquisition equipment, set up trend number
According to storehouse.For abnormal data, can point one-level change immediately signal, two grades prepare spare part signal, three
Level continuous observation signal processing, changes the signal alarm report by status alert device immediately to one-level
Alert, two grades are prepared spare part signal, three grades of continuous observation signals indicating accordingly by status alert device
Lamp indicates.
Understanding three respective duties of Timing Belt accurately in order to clear, status alert device includes three
The individual alarm mechanism corresponding with three Timing Belts.Alarm mechanism is divided into report according to different alert levels
Alert device and the display lamp of different colours.
In order to ensure the accuracy of monitoring result, between data processor and controller, it is additionally provided with one anti-
Feeder line connects, and is one stage signal or the result of possible data mistake to first time measurement result, at data
Reason device transmits instructions to controller by feedback line, and controller sends the detection of command synchronization belt tension again
Device 4 carries out data acquisition to the tension force of Timing Belt 2, gathers data and is transferred to data processor, to result
Still change the abnormal data alarm equipment alarm by alarm mechanism of signal immediately for one-level, to two grades of standards
Standby spare part signal, three grades of continuous observation signals are indicated by the corresponding display lamp of alarm mechanism.
In pitch system of wind driven generator of the present invention, Timing Belt tension monitoring system functions as to machine
The pitch-controlled system of group adds a feedback device, solves the rotation of pitch-controlled system motor and compiles asking of feedback-less
Inscribe, and the present invention does not affect the properly functioning of unit, and theft-resistant link chain and the shape of unit can be accessed
State monitoring system, plays protection and forewarning function.
In the present invention, Timing Belt tension monitoring system is by the most automatically measuring the duty of Timing Belt,
Adjust the tension force of Timing Belt in time, greatly reduce the wind power generating set using this type of pitch-controlled system
The potential safety hazard existed, improves reliability and the availability of wind-driven generator unit, thus improves
The generated energy of wind energy turbine set, reduces O&M cost, adds economic benefit.
Timing Belt tension monitoring system of the present invention can also be applied to other Timing Belt, flat belt or triangle
The industry of the belt transmission operations such as band, such as mine transmission, harbour transmission etc..
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any form
On restriction, those skilled in the art utilize the technology contents of the disclosure above make a little simple modification,
Equivalent variations or modification, all fall within protection scope of the present invention.
Claims (10)
1. a belt tension automatic monitoring system, including belt tension detector, described belt tension
Detector includes the sensor for detecting belt vibration and the data acquisition equipment being connected with sensor,
It is characterized in that, described belt tension automatic monitoring system also includes controlling described belt tension detector
The data processor that the controller of start and stop, data to described belt tension detector collection process
And the status alert device being connected with data processor, described belt tension detector also includes automatically striking
Hitting the automatic striking mechanism of belt, described automatic striking mechanism is fixed on around described belt, described biography
Sensor is fixed on above or below described belt.
Belt tension automatic monitoring system the most according to claim 1, it is characterised in that described
Automatically striking mechanism includes tapping parts and tapping member driving mechanism, and described percussion parts are to tap hammer,
The described hammer that taps is positioned at above or below described belt；Described percussion member driving mechanism is electric magnet
And attracting iron block when being energized with electric magnet, described percussion hammer is attracting with iron block when being energized by electric magnet
Realize tapping belt；Or, described percussion member driving mechanism is cam and the horse driving cam rotation
Reaching, described cam drives described percussion hammer skew occurs and resets when rotating, described percussion hammer skew
Shi Shixian taps belt.
Belt tension automatic monitoring system the most according to claim 1, it is characterised in that described
Data processor is also directly connected with described controller.
4. according to the belt tension automatic monitoring system described in any one of claims 1 to 3, its feature
Being, described belt is Timing Belt.
5. the belt of the belt tension automatic monitoring system as described in any one of Claims 1-4
Tension force automatic monitoring method, it is characterised in that monitoring step is:
(1) described controller controls the unlatching of described belt tension detector；
(2) the automatic striking mechanism of described belt tension detector taps belt, described sensor automatically
The natural frequency of detection belt, described data acquisition equipment carries out data acquisition, when described data acquisition
After equipment data acquisition, data being exported to described data processor, described controller controls institute
State belt tension detector to quit work；
(3) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；Abnormal data is reported to the police by described status alert device.
Belt tension automatic monitoring method the most according to claim 5, it is characterised in that described
Abnormal data point one-level is changed by step (3) immediately signal, two grades prepare spare part signal, three grades hold
Continuous observation signal processes, and described one-level is changed the signal alarm by described status alert device immediately
Report to the police, two grades are prepared spare part signals, three grades of continuous observation signals finger by described status alert device
Show that lamp indicates.
7. the belt tension of a belt tension automatic monitoring system as claimed in claim 3 is supervised automatically
Survey method, it is characterised in that monitoring step is:
(1) described controller controls the unlatching of described belt tension detector；
(2) the automatic striking mechanism of described belt tension detector taps belt, described sensor automatically
The natural frequency of detection belt, described data acquisition equipment carries out data acquisition, when described data acquisition
After equipment data acquisition, data being exported to described data processor, described controller controls institute
State belt tension detector to quit work；
(3) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；Abnormal data point one-level is changed immediately signal, two grades of preparations standby
Part signal, three grades of continuous observation signal processing, change signal processing step immediately for passing to described one-level
Defeated instruction to described controller, repeat the above steps (1), (2), (3), result be still one-level immediately
The abnormal data of the replacing signal alarm equipment alarm by described status alert device, prepares spare parts to two grades
Signal, three grades of continuous observation signals are indicated by the display lamp of described status alert device.
8. a wind turbine pitch-controlled system, the driving means of described pitch-controlled system pass through toothed belt transmission,
It is characterized in that, described pitch-controlled system comprises belt tension as claimed in claim 4 and automatically monitors system
System, described controller is connected with the master control system of described wind turbine, and described belt tension monitors system automatically
System comprises three belt tension detectors the most corresponding with three Timing Belts arranged side by side, described state report
Alert device includes three alarm mechanisms corresponding with three Timing Belts.
Wind turbine pitch-controlled system the most according to claim 8, it is characterised in that described three skins
The data acquisition equipment of belt tension detector merges into one.
10. in a wind turbine pitch-controlled system as claimed in claim 8 or 9, belt tension is supervised automatically
The belt tension automatic monitoring method of examining system, it is characterised in that monitoring step is:
(1) described controller sends the application monitoring described Timing Belt duty to master control system；
(2) when described master control system is by the application of described controller, Wind turbines is out of service,
Described controller controls described belt tension detector and opens；
(3) the automatic striking mechanism of described belt tension detector taps Timing Belt, described sensing automatically
The natural frequency of device detection Timing Belt, described data acquisition equipment carries out data acquisition, when described data
After collecting device data acquisition, data being exported to described data processor, described controller is removed
Sell to the application of master control system and control described belt tension detector and quit work；
(4) the data classification that described data acquisition equipment is transmitted by described data processor processes, and aligns
The often data storage of scope, statistics；To the abnormal data alarm mechanism report by described status alert device
Alert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306488.0A CN104061122B (en) | 2014-06-30 | 2014-06-30 | A kind of belt tension automatic monitoring system and monitoring method and wind turbine pitch-controlled system |
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|---|---|---|---|
| CN201410306488.0A CN104061122B (en) | 2014-06-30 | 2014-06-30 | A kind of belt tension automatic monitoring system and monitoring method and wind turbine pitch-controlled system |
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| CN104061122B true CN104061122B (en) | 2017-01-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105181331B (en) * | 2015-10-23 | 2018-03-16 | 成都嘉陵华西光学精密机械有限公司 | Portable engine front end wheel train detection and analysis device, system and method |
| CN109211455A (en) * | 2017-11-22 | 2019-01-15 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of measurement method, system and the equipment of synchronous belt tensile force |
| CN109946068B (en) * | 2017-12-19 | 2020-09-29 | 新疆金风科技股份有限公司 | Method and device for detecting abnormity of transmission belt in driving assembly |
| CN112985670B (en) * | 2021-01-29 | 2024-01-16 | 合肥晶合集成电路股份有限公司 | Tension automatic monitoring system of semiconductor equipment |
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| DE3817354A1 (en) * | 1987-05-21 | 1988-12-01 | Nissan Motor | Sensor for the detection of kinetic energy, especially piezoelectric sensor for the detection of dynamic or kinetic energy |
| CN1759243A (en) * | 2003-03-21 | 2006-04-12 | 维斯塔斯风力系统有限公司 | Methods of moving the rotating means of a wind turbine during transportation or stand still, method of controlling the moving of the rotating means, nacelle, auxiliary device, control and monitoring |
| CN202544915U (en) * | 2011-12-16 | 2012-11-21 | 淮南市蓝天科技有限公司 | Mining tension protection device |
| CN103105828A (en) * | 2011-11-14 | 2013-05-15 | 洪河 | Pumping unit belt tension measuring cluster management system |
| CN204061047U (en) * | 2014-06-30 | 2014-12-31 | 北京天源科创风电技术有限责任公司 | A kind of belt tension automatic monitoring system and the wind turbine pitch-controlled system containing this system |
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| DE3817354A1 (en) * | 1987-05-21 | 1988-12-01 | Nissan Motor | Sensor for the detection of kinetic energy, especially piezoelectric sensor for the detection of dynamic or kinetic energy |
| CN1759243A (en) * | 2003-03-21 | 2006-04-12 | 维斯塔斯风力系统有限公司 | Methods of moving the rotating means of a wind turbine during transportation or stand still, method of controlling the moving of the rotating means, nacelle, auxiliary device, control and monitoring |
| CN103105828A (en) * | 2011-11-14 | 2013-05-15 | 洪河 | Pumping unit belt tension measuring cluster management system |
| CN202544915U (en) * | 2011-12-16 | 2012-11-21 | 淮南市蓝天科技有限公司 | Mining tension protection device |
| CN204061047U (en) * | 2014-06-30 | 2014-12-31 | 北京天源科创风电技术有限责任公司 | A kind of belt tension automatic monitoring system and the wind turbine pitch-controlled system containing this system |
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