CN113049168B - Fan mesh bolt pretightening force monitoring devices - Google Patents
Fan mesh bolt pretightening force monitoring devices Download PDFInfo
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- CN113049168B CN113049168B CN202110268827.0A CN202110268827A CN113049168B CN 113049168 B CN113049168 B CN 113049168B CN 202110268827 A CN202110268827 A CN 202110268827A CN 113049168 B CN113049168 B CN 113049168B
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- bolt
- spring
- tightening force
- acquisition station
- pretightening force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
Abstract
The invention relates to a monitoring device for the pretightening force of a mesh bolt of a fan, which comprises: the system comprises 1 pretightening force acquisition station, N pull rings and N pretightening force trigger lines which are arranged in a net shape; the pre-tightening force acquisition station comprises a signal collection layer and N stress sensors, wherein the N stress sensors are distributed circumferentially; the stress sensor comprises a closed loop consisting of a power supply, a fixed resistor, a sliding rheostat, a spring and an ammeter, wherein the first end of the spring is connected with the sliding end of the sliding rheostat, and the second end of the spring is connected with the ammeter; the second ends of all the springs are fixed at the central point of the pre-tightening force acquisition station; the first end of each spring is also connected with 1 pull ring through 1 pretightening force trigger line, and the pull rings are fixed on the bolts; the signal collection layer collects the readings of all the galvanometers and stores the numbers of all the bolts. The invention can monitor the loosening condition of all the bolts on the flange plate, can accurately position which bolt is loosened, and can evaluate the number of loosening turns of the bolt.
Description
Technical Field
The invention relates to the field of bolt looseness prevention, in particular to a device for monitoring the pretightening force of a mesh bolt of a fan.
Background
The wind generating set is in a severe environment for a long time and bears complex working condition operation, and is used as a large-scale assembly product, and bolt connection is a main connection mode among all parts. Under the action of complex loads such as long-term vibration, bending moment and the like, connecting fasteners among all parts can be damaged to different degrees. The magnitude and the dispersion degree of the pretightening force value after the bolt connection directly determine the load transmission and the operation safety of the unit, if the pretightening force value of the bolt does not reach the specified magnitude, the bolt is easy to loosen along with the alternating load action of the wind turbine generator, and the operation risk of the unit is increased.
The methods for monitoring the state of the bolt are divided into an ultrasonic detection method and a corner monitoring and measuring method. The ultrasonic detection scheme is that the elongation of the bolt is directly measured in an ultrasonic mode, and the current bolt pretension value is directly calculated through early calibration to give bolt loosening early warning; the angle turning method measures the loosening angle of the nut through a high-precision angle sensor, reversely pushes the elongation change of the bolt according to the relation between the rotation angle and the thread to obtain the current bolt pre-tightening force value, can sense the slight loosening of the bolt, and can monitor the loosening of the bolt caused by the change of the pre-tightening force in real time.
The scheme has high requirement on measurement accuracy, a precise measurement instrument is required, the bolt angle on the flange plate can only monitor 10% -30% of bolts on the same flange plate in the conventional scheme, and if all the bolts are monitored, the cost is high, and the method is not suitable for batch popularization.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a fan mesh bolt pretension monitoring device that overcomes or at least partially solves the above-mentioned problems.
According to one aspect of the invention, a device for monitoring the pre-tightening force of the mesh bolts of the fan is provided, the device is located at the center of a flange plate of a fan tower, N bolts are arranged on the flange plate of the fan tower, and the device for monitoring the pre-tightening force of the mesh bolts of the fan comprises: the system comprises 1 pre-tightening force acquisition station, N pull rings and N pre-tightening force trigger lines, wherein the pre-tightening force trigger lines are arranged in a net shape; the pre-tightening force acquisition station at least comprises a signal collection layer and N stress sensors, wherein the N stress sensors are distributed circumferentially and correspond to the N bolts; the stress sensor comprises a closed loop consisting of a power supply, a fixed resistor, a sliding rheostat, a spring and an ammeter, wherein the first end of the spring is connected with the sliding end of the sliding rheostat, and the second end of the spring is connected with the ammeter; the second ends of all the springs are fixed at the central point of the pretightening force acquisition station; the first end of each spring is also connected with 1 pull ring through 1 pretightening force trigger line, and the pull rings are fixed on the bolts; the signal collection layer collects the readings of all the galvanometers and stores the numbers of all the bolts.
In one possible embodiment, the pretension force acquisition station further comprises a wireless transmission layer.
In one possible embodiment, the pull ring is fitted to a corner of the bolt, and the pretension trigger line is connected to a corner of the pull ring.
In one possible embodiment, the pretension trigger line is a nylon line or a super-strong PE fiber line.
In a possible embodiment, the pretensioning force acquisition station further comprises a power supply layer for supplying power to the signal collection layer and the wireless transmission layer.
In a possible embodiment, the signal acquisition layer has a larger diameter than the wireless transmission layer and the power supply layer.
The invention can monitor the loosening condition of all the bolts on the flange plate, can accurately position which bolt is loosened, and can evaluate the number of loosening turns of the bolt.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a device for monitoring a pre-tightening force of a mesh bolt of a fan according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a pretension force acquisition station according to an embodiment of the present invention;
FIG. 3 is a top view corresponding to FIG. 2;
fig. 4 is a schematic diagram of a device for monitoring the pre-tightening force of the mesh bolt of the fan according to the embodiment of the present invention;
FIG. 5 is a schematic illustration of a pretension trigger line, a tab and a bolt connection;
FIG. 6 is a schematic diagram of the positional relationship of the pretension acquisition station and the pretension trigger line;
description of the reference numerals:
1-a pretightening force acquisition station, 2-a pretightening force trigger line, 3-a pull ring, 4-a bolt and 5-a fan tower drum flange plate;
11-a signal collection layer, 12-a stress sensor, 13-a wireless transmission layer, 14-a power supply layer;
121-power supply, 122-fixed resistance, 123-sliding rheostat, 124-spring, 125-current meter.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terms "comprises" and "comprising," and any variations thereof, in the described embodiments of the invention and in the claims and drawings, are intended to cover a non-exclusive inclusion, such as, for example, a list of steps or elements.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 6, an embodiment of the present invention provides a device for monitoring a pre-tightening force of a mesh bolt of a fan, which is located at a center of a flange 5 of a tower drum of the fan, wherein N bolts 4 are arranged on the flange 5 of the tower drum of the fan, and the device for monitoring the pre-tightening force of the mesh bolt of the fan includes:
the system comprises 1 pre-tightening force acquisition station 1, N pull rings 3 and N pre-tightening force trigger lines 2, wherein the pre-tightening force trigger lines are arranged in a net shape;
the pre-tightening force acquisition station 1 at least comprises a signal collection layer 11 and N stress sensors 12, wherein the N stress sensors 12 are distributed circumferentially and correspond to N bolts;
the stress sensor 12 comprises a closed loop consisting of a power supply 121, a fixed resistor 122, a sliding rheostat 123, a spring 124 and an ammeter 125, wherein a first end of the spring 124 is connected with a sliding end of the sliding rheostat 123, and a second end of the spring 124 is connected with the ammeter 125;
the second ends of all the springs 125 are fixed at the center point of the pretightening force acquisition station 1;
the first end of each spring 125 is also connected to 1 pull ring 3 through 1 pre-tightening force trigger line 2, and the pull ring 3 is fixed on the bolt 4;
the signal collection layer 11 collects the readings of all the galvanometers 125 and stores the numbers of all the bolts 4.
In one example, the pretightening force acquisition station 1 further includes a wireless transmission layer 13, and the wireless transmission layer 13 transmits the pretightening force signal collected by the signal collection layer 11 to a receiver, and then enters a wind field ring network to be transmitted to a booster station background.
In one example, the pull ring 3 is attached to the corner of the bolt 4, the pretightening force trigger line 2 is connected with one corner of the pull ring 3,
in one example, the pretension trigger line 2 is a nylon thread or a super-strong PE fiber thread.
During installation and debugging, each bolt can be numbered. This allows for precise positioning of the loosened bolt and the degree of loosening.
The principle is as follows: the stiffness coefficient of the spring is K, and the force applied to the spring is proportional to the length X over which the spring is stretched, i.e., F = K X, according to the principle of spring measurement. If the pretightening force acquisition station monitors the stress change, the stretched length of the spring can be calculated. The nut circumference C of the bolt is predictable, and the degree of bolt loosening S = X/C = (F/K)/C can be calculated.
The pretightening force trigger line is arranged in a net shape, and can monitor the loosening condition of all the bolts on the flange plate. Once the bolt is loosened, the loosening can be accurately positioned, and the number of times of loosening of the bolt is evaluated.
In one example, the pretensioning force acquisition station 1 further comprises a power supply layer 14, which is a 24VDC power supply portion, that supplies power to the signal collection layer 11 and the wireless transmission layer 13.
In one example, the signal acquisition layer 11 is circular because the wind turbine tower is circular, and the circular shape of the signal acquisition layer 11 ensures that the spacing of the signal acquisition layer to the wind turbine tower bolts is equal.
Illustratively, the diameter of the signal acquisition layer 11 is larger than the diameter of the wireless transmission layer 12 and the power supply layer 13, and more stress sensor ports can be arranged.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a fan mesh bolt pretightning force monitoring devices, is located the central point of fan tower section of thick bamboo ring flange (5) and puts, is provided with N bolt (4) on fan tower section of thick bamboo ring flange (5), its characterized in that, fan mesh bolt pretightning force monitoring devices includes: the system comprises 1 pre-tightening force acquisition station (1), N pull rings (3) and N pre-tightening force trigger lines (2), wherein the pre-tightening force trigger lines are arranged in a net shape;
the pre-tightening force acquisition station (1) at least comprises a signal collection layer (11) and N stress sensors (12), wherein the N stress sensors (12) are distributed circumferentially and correspond to the N bolts;
the stress sensor (12) comprises a closed loop consisting of a power supply (121), a fixed resistor (122), a sliding rheostat (123), a spring (124) and an ammeter (125), wherein a first end of the spring (124) is connected with a sliding end of the sliding rheostat (123), and a second end of the spring (124) is connected with the ammeter (125);
the second ends of all the springs (124) are fixed at the central point of the pretightening force acquisition station (1);
the first end of each spring (124) is also connected with 1 pull ring (3) through 1 pretightening force trigger line (2), and the pull ring (3) is fixed on the bolt (4);
the signal collection layer (11) collects the readings of all the galvanometers (125) and stores the numbers of all the bolts (4);
the pre-tightening force acquisition station (1) further comprises a wireless transmission layer (13);
the pull ring (3) is attached to the edge of the bolt (4), and the pretightening force trigger line (2) is connected with one angle of the pull ring (3);
the pre-tightening force acquisition station (1) further comprises a power supply layer (14) for supplying power to the signal collection layer (11) and the wireless transmission layer (13);
the principle is as follows: the stiffness coefficient of the spring is K, and the force applied to the spring is proportional to the length X of the spring that is stretched according to the spring measurement principle, i.e. F = K X; if the pre-tightening force acquisition station monitors the stress change, the stretched length of the spring can be calculated; the nut circumference C of the bolt is predictable, and the degree of bolt loosening S = X/C = (F/K)/C can be calculated.
2. The blower mesh bolt pretension monitoring device according to claim 1,
the pre-tightening force trigger line (2) adopts a nylon line or an ultra-strong PE fiber line.
3. The blower mesh bolt pretightening force monitoring device according to claim 1, wherein the diameter of the signal collecting layer (11) is larger than the wireless transmission layer (13) and the power supply layer (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110268827.0A CN113049168B (en) | 2021-03-12 | 2021-03-12 | Fan mesh bolt pretightening force monitoring devices |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110268827.0A CN113049168B (en) | 2021-03-12 | 2021-03-12 | Fan mesh bolt pretightening force monitoring devices |
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| CN113049168A CN113049168A (en) | 2021-06-29 |
| CN113049168B true CN113049168B (en) | 2022-12-09 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009210276A (en) * | 2008-02-29 | 2009-09-17 | Mitsubishi Heavy Ind Ltd | System and method for detecting loosening of fastening implement |
| CN211504073U (en) * | 2020-03-19 | 2020-09-15 | 郑州陆根智能技术有限公司 | Loose monitoring system of flange joint bolt |
| CN111750902A (en) * | 2020-06-24 | 2020-10-09 | 兰州理工大学 | Multi-sensitivity piezoelectric bolt looseness monitoring device and use and identification method thereof |
| CN111829768A (en) * | 2020-07-28 | 2020-10-27 | 哈尔滨工业大学 | Bolt looseness sensing device based on piezoelectric traction effect |
| CN211954195U (en) * | 2020-06-05 | 2020-11-17 | 郑州爱因特电子科技有限公司 | Flange bolt looseness monitoring device |
| CN112097706A (en) * | 2020-08-24 | 2020-12-18 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Wind power tower cylinder flange bolt looseness real-time monitoring system and early warning method |
| CN112267981A (en) * | 2020-11-12 | 2021-01-26 | 龙源（北京）风电工程技术有限公司 | Monitoring device and monitoring method for monitoring bolt loosening state and wind turbine generator |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3934952A1 (en) * | 1989-10-20 | 1991-04-25 | Messerschmitt Boelkow Blohm | MONITORING DEVICE FOR A CONNECTING ELEMENT |
| KR101532622B1 (en) * | 2014-05-07 | 2015-06-30 | 서울시립대학교 산학협력단 | Fastening apparatus and spring washer thereof |
| JP2016053479A (en) * | 2014-09-02 | 2016-04-14 | 株式会社共和電業 | Screw looseness monitoring system, screw removal monitoring system, and screw looseness or removal monitoring system |
| CN206019996U (en) * | 2016-07-01 | 2017-03-15 | 苏州东菱振动试验仪器有限公司 | A kind of early warning mechanism of Wind turbines |
| CN106969859A (en) * | 2017-05-05 | 2017-07-21 | 中国海洋大学 | The measuring method and device of arthropod foot of a chela strength |
| DE102017008782A1 (en) * | 2017-09-20 | 2019-03-21 | Senvion Gmbh | System and method for monitoring a flange connection of a wind turbine |
| CN108871170B (en) * | 2018-06-29 | 2021-03-02 | 深圳清华大学研究院 | Method for configuring pre-tightening force of trigger type measuring head and three-coordinate measuring machine |
| CN111341075B (en) * | 2020-03-06 | 2021-11-16 | 国家电投集团徐闻风力发电有限公司 | Alarm system and alarm method for looseness of bolts of wind turbine tower |
-
2021
- 2021-03-12 CN CN202110268827.0A patent/CN113049168B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009210276A (en) * | 2008-02-29 | 2009-09-17 | Mitsubishi Heavy Ind Ltd | System and method for detecting loosening of fastening implement |
| CN211504073U (en) * | 2020-03-19 | 2020-09-15 | 郑州陆根智能技术有限公司 | Loose monitoring system of flange joint bolt |
| CN211954195U (en) * | 2020-06-05 | 2020-11-17 | 郑州爱因特电子科技有限公司 | Flange bolt looseness monitoring device |
| CN111750902A (en) * | 2020-06-24 | 2020-10-09 | 兰州理工大学 | Multi-sensitivity piezoelectric bolt looseness monitoring device and use and identification method thereof |
| CN111829768A (en) * | 2020-07-28 | 2020-10-27 | 哈尔滨工业大学 | Bolt looseness sensing device based on piezoelectric traction effect |
| CN112097706A (en) * | 2020-08-24 | 2020-12-18 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Wind power tower cylinder flange bolt looseness real-time monitoring system and early warning method |
| CN112267981A (en) * | 2020-11-12 | 2021-01-26 | 龙源（北京）风电工程技术有限公司 | Monitoring device and monitoring method for monitoring bolt loosening state and wind turbine generator |
Non-Patent Citations (2)
| Title |
|---|
| 基于螺母外侧压电材料阻抗峰值频率变化的螺栓松动监测;汪正傲等;《传感技术学报》;20180630(第06期);第45-49页 * |
| 风力发电塔筒螺栓监测前沿技术研究;贾成鹏等;《电力设备管理》;20200331(第03期);第146-147页 * |
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