CN110778463A - Fan blade bolt fracture monitoring and protecting method and device - Google Patents

Fan blade bolt fracture monitoring and protecting method and device Download PDF

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Publication number
CN110778463A
CN110778463A CN201910877394.1A CN201910877394A CN110778463A CN 110778463 A CN110778463 A CN 110778463A CN 201910877394 A CN201910877394 A CN 201910877394A CN 110778463 A CN110778463 A CN 110778463A
Authority
CN
China
Prior art keywords
bolt
fan
fan blade
wire
closed circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201910877394.1A
Other languages
Chinese (zh)
Inventor
兰杰
曾宇
龚学静
林淑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongfang Electric Wind Power Co Ltd
Original Assignee
Dongfang Electric Wind Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfang Electric Wind Power Co Ltd filed Critical Dongfang Electric Wind Power Co Ltd
Priority to CN201910877394.1A priority Critical patent/CN110778463A/en
Publication of CN110778463A publication Critical patent/CN110778463A/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D17/00Monitoring or testing of wind motors, e.g. diagnostics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D7/00Controlling wind motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/728Onshore wind turbines

Abstract

The invention discloses a fan blade bolt fracture monitoring and protecting method, wherein a fan blade is assembled on a hub of a fan and is fixedly connected with the hub through a bolt, and the method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a current detection device is arranged in the closed circuit, and a detected current signal is sent to a fan main control in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt head is torn off, the current of the closed circuit disappears, the logic of a signal sent to the fan master control by the current detection device is '0', the fan master control controls the fan to stop, major accidents are avoided, and the operation safety of the fan is ensured.

Description

Fan blade bolt fracture monitoring and protecting method and device
Technical Field
The invention belongs to the wind power generation technology, relates to the fan safety protection technology, and particularly relates to a fan blade bolt fracture monitoring protection method and device.
Background
At present, with the continuous deep development of domestic wind power generation resources, more and more wind power generation sets are operated in a grid-connected mode, the power is higher and higher, and the safe and stable operation of the sets faces increasingly severe examination. Especially, the connecting bolt of the blade and the hub bears complicated alternating load, and the fatigue life of the bolt is difficult to accurately calculate by the conventional design method. Simply increasing the fatigue safety margin results in increased design costs. At the early stage of bolt fracture, if not discover in time, the unit continues to take ill operation, then can accelerate more bolt fracture, leads to serious consequences such as blade drop, fall the machine.
Disclosure of Invention
Aiming at the problems, the invention provides a method and a device for monitoring and protecting the fracture of a bolt of a fan blade. The fracture condition of any connecting bolt for connecting the blade of the wind generating set and the hub of the wind generating set can be detected in time, and the main control of the fan immediately takes corresponding measures to ensure the operation safety of the set.
The technical scheme of the invention is as follows:
a fan blade bolt fracture monitoring and protecting method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a current detection device is arranged in the closed circuit, and detected current signals are sent to a fan main controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt hole is torn off, the current of the closed circuit disappears, the logic of a signal sent to the fan master control by the current detection device is '0', and the fan master control controls the fan to stop.
The method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a voltage detection device is arranged in the closed circuit and used for detecting the terminal voltage of the load, and detected voltage signals are sent to the main controller of the fan in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt head is torn off, the voltage of the load end disappears, the logic of a signal sent to the fan master control by the voltage detection device is '0', and the fan master control controls the fan to stop.
The method is characterized in that an optical transmission channel consisting of a light source and optical fibers is arranged, when the optical fibers are laid, the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade by fasteners, and the tail end of the optical transmission channel is provided with a light detection device for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a fan master controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the optical fiber fixed on the bolt hole is torn off, the optical signal disappears, the logic of the signal sent to the fan main control by the optical detection device is '0', and the fan main control controls the fan to stop.
A fan blade bolt fracture monitoring device comprises a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on the head of each fan blade bolt through a fastener, a current detection device is arranged in the closed circuit, and detected current signals can be sent to a fan main controller in a logic expression mode of '1' and '0'.
The other fan blade bolt breakage monitoring device comprises a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on each fan blade bolt head through a fastener, a voltage detection device is arranged in the closed circuit and used for detecting the end voltage of the load and sending detected voltage signals to a fan main controller in a logic expression mode of '1' and '0'.
The fan blade bolt breakage monitoring device comprises an optical transmission channel consisting of a light source and optical fibers, wherein the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade through a fastener, and the tail end of the optical transmission channel is provided with a light detection device for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a fan main controller in a logic expression mode of '1' and '0'.
The invention has the beneficial technical effects that:
the fan bolt fracture condition can be timely and accurately detected, the main control adopts corresponding treatment measures, major accidents are avoided, and the running safety of the fan is ensured.
Drawings
FIG. 1 is a structural view of a detecting device of the present invention
FIG. 2 is another structural view of the detecting device of the present invention
FIG. 3 is a view showing still another structure of the detecting unit of the present invention.
Detailed Description
Example one
Referring to fig. 1, the fan blade bolt fracture monitoring device includes a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on each fan blade bolt head through a fastener, and a current detection device is arranged in the closed circuit and can send detected current signals to a fan main controller in a logic expression mode of '1' and '0'.
Example two
Referring to fig. 2, the fan blade bolt fracture monitoring device includes a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on each fan blade bolt head through a fastener, and a voltage detection device is arranged in the closed circuit and is used for detecting the terminal voltage of the load and sending detected voltage signals to a fan main controller in a logic expression mode of '1' and '0'.
EXAMPLE III
Referring to fig. 3: the fan blade bolt fracture monitoring device comprises an optical transmission channel consisting of a light source and optical fibers, wherein the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade through a fastener, and the tail end of the optical transmission channel is provided with an optical detection device for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a fan master control in a logic expression mode of '1' and '0'.
Example four
Referring to fig. 1: the fan blade bolt fracture monitoring and protecting method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a current detecting device is arranged in the closed circuit, and detected current signals are sent to a fan main controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt hole is torn off, the current of the closed circuit disappears, the logic of a signal sent to the fan master control by the current detection device is '0', and the fan master control controls the fan to stop.
EXAMPLE five
Referring to fig. 2: the fan blade bolt fracture monitoring and protecting method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt and is fixed on the bolt head of each fan blade through a fastener, a voltage detection device is arranged in the closed circuit and used for detecting the end voltage of the load and sending a detected voltage signal to a fan main controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt head is torn off, the voltage of the load end disappears, the logic of a signal sent to the fan master control by the voltage detection device is '0', and the fan master control controls the fan to stop.
EXAMPLE six
Referring to fig. 3: the fan blade bolt fracture monitoring and protecting method is characterized in that an optical transmission channel consisting of a light source and optical fibers is arranged, when the optical fibers are laid, the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade by fasteners, and the tail end of the optical transmission channel is provided with a light detection device for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a main controller of the fan in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the optical fiber fixed on the bolt hole is torn off, the optical signal disappears, the logic of the signal sent to the fan main control by the optical detection device is '0', and the fan main control controls the fan to stop.

Claims (6)

1. A fan blade bolt fracture monitoring and protecting method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a current detection device is arranged in the closed circuit, and detected current signals are sent to a fan main controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt hole is torn off, the current of the closed circuit disappears, the logic of a signal sent to the fan master control by the current detection device is '0', and the fan master control controls the fan to stop.
2. A fan blade bolt fracture monitoring and protecting method is characterized in that a closed circuit formed by connecting a power supply and a load through a wire is arranged, when the wire is laid, the wire passes through each fan blade bolt, the wire is fixed on the bolt head of each fan blade through a fastener, a voltage detection device is arranged in the closed circuit and used for detecting the end voltage of the load, and detected voltage signals are sent to a fan main controller in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the wire fixed on the bolt head is torn off, the voltage of the load end disappears, the logic of a signal sent to the fan master control by the voltage detection device is '0', and the fan master control controls the fan to stop.
3. A fan blade bolt fracture monitoring and protecting method is characterized in that an optical transmission channel composed of a light source and optical fibers is arranged, when the optical fibers are laid, the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade through a fastener, and a light detection device is arranged at the tail end of the optical transmission channel and used for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a main controller of a fan in a logic expression mode of '1' and '0'; when any bolt is broken, the broken bolt head falls out of the bolt hole of the hub under the action of the gravity of the bolt head and the motion inertia of the wind wheel, the optical fiber fixed on the bolt hole is torn off, the optical signal disappears, the logic of the signal sent to the fan main control by the optical detection device is '0', and the fan main control controls the fan to stop.
4. A fan blade bolt fracture monitoring device is characterized by comprising a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on each fan blade bolt head through a fastener, a current detection device is arranged in the closed circuit, and detected current signals can be sent to a fan main controller in a logic expression mode of '1' and '0'.
5. A fan blade bolt fracture monitoring device is characterized by comprising a closed circuit formed by connecting a power supply and a load through a wire, wherein the wire passes through each fan blade bolt, and is fixed on each fan blade bolt head through a fastener, and a voltage detection device is arranged in the closed circuit and used for detecting the terminal voltage of the load and sending detected voltage signals to a fan main controller in a logic expression mode of '1' and '0'.
6. A fan blade bolt fracture monitoring device is characterized by comprising an optical transmission channel consisting of a light source and optical fibers, wherein the optical fibers pass through each fan blade bolt, the optical fibers are fixed on the bolt head of each fan blade through a fastener, and the tail end of the optical transmission channel is provided with a light detection device for detecting optical signals at the tail end of the optical fibers and sending the detected optical signals to a fan main controller in a logic expression mode of '1' and '0'.
CN201910877394.1A 2019-09-17 2019-09-17 Fan blade bolt fracture monitoring and protecting method and device Withdrawn CN110778463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910877394.1A CN110778463A (en) 2019-09-17 2019-09-17 Fan blade bolt fracture monitoring and protecting method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910877394.1A CN110778463A (en) 2019-09-17 2019-09-17 Fan blade bolt fracture monitoring and protecting method and device

Publications (1)

Publication Number Publication Date
CN110778463A true CN110778463A (en) 2020-02-11

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CN201910877394.1A Withdrawn CN110778463A (en) 2019-09-17 2019-09-17 Fan blade bolt fracture monitoring and protecting method and device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852791A (en) * 2020-07-30 2020-10-30 国电龙源江永风力发电有限公司 Fracture positioning early warning method for flange connecting bolt of wind generating set

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09159719A (en) * 1995-12-08 1997-06-20 Nissin Electric Co Ltd Apparatus for diagnosing insulation abnormality of gas insulation electric device
US20120134809A1 (en) * 2011-12-06 2012-05-31 General Electric Company System and method for detecting loads transmitted through a blade root of a wind turbine rotor blade
CN205228815U (en) * 2015-12-22 2016-05-11 长安大学 Detect device of bolt -up situation for car
CN205936988U (en) * 2016-08-29 2017-02-08 新疆金风科技股份有限公司 Wind generating set wheel hub and tower section of thick bamboo inner part drop and monitor alarm system
CN206192641U (en) * 2016-09-29 2017-05-24 远景能源(江苏)有限公司 Be used for monitoring cracked device of bolt
CN207008077U (en) * 2017-07-25 2018-02-13 远景能源(江苏)有限公司 Monitoring bolt breaking device
CN108089230A (en) * 2018-01-25 2018-05-29 安徽省特种设备检测院 A kind of screw retention detector
CN108490500A (en) * 2018-05-23 2018-09-04 湘电风能有限公司 A kind of bolt anti-fall device
CN108896285A (en) * 2018-06-08 2018-11-27 远景能源(江苏)有限公司 A kind of fastener monitoring arrangement
CN109322799A (en) * 2018-11-12 2019-02-12 郭楚文 Multi-functional wind power equipment fastener detecting device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09159719A (en) * 1995-12-08 1997-06-20 Nissin Electric Co Ltd Apparatus for diagnosing insulation abnormality of gas insulation electric device
US20120134809A1 (en) * 2011-12-06 2012-05-31 General Electric Company System and method for detecting loads transmitted through a blade root of a wind turbine rotor blade
CN205228815U (en) * 2015-12-22 2016-05-11 长安大学 Detect device of bolt -up situation for car
CN205936988U (en) * 2016-08-29 2017-02-08 新疆金风科技股份有限公司 Wind generating set wheel hub and tower section of thick bamboo inner part drop and monitor alarm system
CN206192641U (en) * 2016-09-29 2017-05-24 远景能源(江苏)有限公司 Be used for monitoring cracked device of bolt
CN207008077U (en) * 2017-07-25 2018-02-13 远景能源(江苏)有限公司 Monitoring bolt breaking device
CN108089230A (en) * 2018-01-25 2018-05-29 安徽省特种设备检测院 A kind of screw retention detector
CN108490500A (en) * 2018-05-23 2018-09-04 湘电风能有限公司 A kind of bolt anti-fall device
CN108896285A (en) * 2018-06-08 2018-11-27 远景能源(江苏)有限公司 A kind of fastener monitoring arrangement
CN109322799A (en) * 2018-11-12 2019-02-12 郭楚文 Multi-functional wind power equipment fastener detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852791A (en) * 2020-07-30 2020-10-30 国电龙源江永风力发电有限公司 Fracture positioning early warning method for flange connecting bolt of wind generating set

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Application publication date: 20200211