CN205592073U

CN205592073U - Wind generating set blade nondestructive test device

Info

Publication number: CN205592073U
Application number: CN201620281165.5U
Authority: CN
Inventors: 韩荣峰; 谢立伟; 贺艳峰
Original assignee: Xi'an Fu Fu Liye New Power Technology Co Ltd
Current assignee: Xi'an Fu Fu Liye New Power Technology Co Ltd
Priority date: 2016-04-06
Filing date: 2016-04-06
Publication date: 2016-09-21
Anticipated expiration: 2026-04-06

Abstract

The utility model discloses a wind generating set blade nondestructive test device, including the unit of testing vibration, the unit of testing vibration is connected with the data acquisition unit, and the data acquisition unit is connected with the data transmission unit, and air velocity transducer, wind direction sensor, temperature sensor and humidity transducer connect with the data acquisition unit respectively simultaneously, and electrical unit connects with test vibration unit, data acquisition unit and data transmission unit simultaneously, the utility model discloses a non -contact shakes the measurement, through the modal damping ratio D who detects the blade, can realize changing the blade operating condition that reason such as come unstuck owing to blade crackle, inside, connecting bolt become flexible caused and carry out comprehensive aassessment, not only improves the efficiency that detects greatly, can not cause the damage to the blade moreover in the testing process, and measurement accuracy was higher the while.

Description

A kind of wind generator set blade the cannot-harm-detection device

Technical field

This utility model relates to wind power plant detection technique field, is specifically related to a kind of being suitable for Device in Non-Destructive Testing wind generator set blade state.

Background technology

Currently for the detection of in-service wind generator set blade state, conventional method has mesh Depending on method, patch strain gauge method, and detected by the method such as ultrasound wave or infrared ray, but the most not With degree ground existing defects, it is specific as follows:

1, visual method is by using telescope or utilizing hanging basket that people is suspended on blade surface, with Observing the damage status of blade, blade surface is damaged, has spread over blade and split by the method Stricture of vagina has good recognition reaction；But for the blade initial stage be not also extended to surface crackle, The degumming of blade interior, the fault such as loosen of connecting bolt can not well identify, and lead to Cross telescope to observe and be only capable of finding surface damage and bigger face crack, it is impossible to identify blade Other existing potential or internal faults, and utilize hanging basket that people is suspended on blade surface and carry out During detection, not only danger is higher, and work efficiency is low；

2, by monitoring the deformation of root of blade in the method for root of fan blade patch foil gauge Amount, and assess the state of blade successively, but owing to root of fan blade is relatively large in diameter, the party There is certain difficulty in method, and measurement error relatively big in the specific implementation, and measurement result is the most also Can not truly reflect the state of whole surveyed blade；

3, detect blade state by the method such as ultrasound wave, infrared ray, be suitable for blade Finely detect, but the method detection efficiency is low, do not conform to the leaf that is suitable to large area to wind energy turbine set Sheet is patrolled and examined.

Utility model content

For solving above-mentioned prior art problem, the purpose of this utility model is to provide one to pass through Blade is carried out mould measurement, obtains the variable quantity of its damping ratios D, and comment with this Estimate the non-contact type nondestructive detecting device of blade state.

For realizing above-mentioned technical purpose, technical solution adopted in the utility model is as follows:

A kind of wind generator set blade the cannot-harm-detection device, it is characterised in that: include vibration measuring Unit, described vibration measuring unit is connected with data acquisition unit, and described data acquisition unit is with number Be connected according to transmission unit, also include power subsystem, described power subsystem with vibration measuring unit, Data acquisition unit and data transmission unit are simultaneously connected with.

Further, described vibration measuring unit is laser vibration measurer.

Further, also include the sensor unit that same data acquisition unit is connected, described Sensor unit includes air velocity transducer, wind transducer, temperature sensor and humidity sensor.

By above technical scheme, the beneficial effects of the utility model are as follows:

1, this utility model is by detecting the damping ratios D of blade, it is achieved to due to blade The blade working state change that the reasons such as crackle, blade interior degumming, connecting bolt loosen cause Comprehensively assess, and mode is hindered by the factor such as wind speed when combining detection, temperature, humidity Buddhist nun's impact than D, only can change obvious blade to blade modal damping ratio D value and carry out son Thin inspection, is greatly improved the efficiency of detection；

2, it is made up of composite due to pneumatic equipment blades, and bulky, do not damaging leaf Vibrating sensor conventional on the premise of sheet cannot be installed on blade again, and this utility model uses non- Contact vibration survey, will not cause damage, and certainty of measurement during detection to blade Higher.

Accompanying drawing explanation

Fig. 1 is that this utility model implements schematic diagram.

Description of reference numerals: 1, laser vibration measurer；2, data acquisition unit；3, network transmission Equipment；4, air velocity transducer；5, wind transducer；6, temperature sensor；7, humidity passes Sensor；8, power supply；A, pneumatic equipment blades；B, reflective sheeting；C, PC.

Detailed description of the invention

For making technical characteristic of the present utility model, realization rate and beneficial effect it can be readily appreciated that with This utility model is described in further detail by lower combination drawings and Examples, but be not construed as right Restriction of the present utility model.

As it is shown in figure 1, a kind of wind generator set blade the cannot-harm-detection device, include for Measuring the pneumatic equipment blades a laser vibration measurer 1 through hammering after vibration amount, laser vibration measurer 1 leads to Cross signal conductor and be used for gathering vibration, wind speed, wind direction, temperature, moisture signal together, and to adopting The data acquisition unit 2 of the process such as the signal of collection is filtered, amplifies, analog digital conversion is connected, Data acquisition unit 2 is transmitted to PC c with the data for collecting by Network transmission line Data network transmission equipment 3 be connected, for measuring the air velocity transducer 4 of wind speed, be used for Measure the wind transducer 5 of wind direction, for measuring the temperature sensor 6 of temperature and for surveying The humidity sensor 7 of amount humidity is simultaneously connected with data acquisition unit 2 by signal conductor respectively, Laser vibration measurer 1, data acquisition unit 2 and data network transmission equipment 3 are by the same electricity of power line Source 8 is simultaneously connected with.

Principle of the present utility model is as follows:

Blade cracks, the degumming of blade interior and connecting bolt loosen etc. fault influence whether Damping ratios D suffered by blade, is changed the natural frequency of blade, by blade Carry out mould measurement, the variable quantity of its damping ratios D can be obtained, assess leaf with this The state of sheet.

During use, first (height of laser vibration measurer 1 is i.e. installed at the height measuring vibration data Degree), utilize wind transducer 5 to obtain wind direction information, and whether compare wind turbine impeller Just wind is carried out flow path direction, if wind turbine impeller just carrys out flow path direction to wind, then pass through wind energy conversion system Yaw system adjust wind energy conversion system nacelle position, until wind turbine impeller just wind is being come flow path direction (or Rightabout), and by pitch-controlled system adjust pneumatic equipment blades a to blade angle be 0 ° of position (also Can be other angles, as long as it is identical to guarantee to detect time-varying angle every time), the most as far as possible Reduce impact that when detecting pneumatic equipment blades a every time, blade is damped by wind direction and (or make leaf Flow path direction is carried out back to wind in wheel direction, as long as the directional reference selected when detecting is identical every time).

After pneumatic equipment blades a adjusts, sticking for reflecting Laser Measuring close to blade tip position The reflective sheeting b of the laser beam that Vibration Meter 1 produces, subsequently (can not be to leaf by special fullering tool Sheet causes damage) along wind direction direction hammering pneumatic equipment blades a so that it is produce free vibration, Adopted by laser vibration measurer 1 and air velocity transducer 4, temperature sensor 6, humidity sensor 7 The data such as the collection vibration of pneumatic equipment blades a, wind speed, temperature, humidity, and according to Theory of Vibration And existing ripe technical method asks for the damping ratios D of blade, detection every time is tried to achieve Damping ratios D is according to wind speed at that time, humidity, temperature, blower fan numbering, blade numbering It is stored in the blade damping value data base set up on PC in advance etc. information, by calling number According to the damping ratios D historical data under operating mode corresponding in storehouse, draw damping ratios D's Whether trendgram, have significant change to assess the state of blade by observation trend.If above-mentioned become Gesture figure has obvious metamorphosis, then illustrate that the state of blade creates significant change, now need into one Step checks the situation of blade, and searches the source of trouble；As inconspicuous in above-mentioned Long-term change trend, then show Blade, without significant change, can not further be checked by blade state.

Claims

1. wind generator set blade the cannot-harm-detection device, it is characterised in that: include Vibration measuring unit, described vibration measuring unit is connected with data acquisition unit, described data acquisition unit Being connected with data transmission unit, also include power subsystem, described power subsystem is with vibration measuring list Unit, data acquisition unit and data transmission unit are simultaneously connected with.

A kind of wind generator set blade the cannot-harm-detection device the most according to claim 1, It is characterized in that: described vibration measuring unit is laser vibration measurer.

A kind of wind generator set blade the cannot-harm-detection device the most according to claim 1, It is characterized in that: also include the sensor unit that same data acquisition unit is connected, described biography Sensor cell includes air velocity transducer, wind transducer, temperature sensor and humidity sensor.