Wind turbine generator bolt load monitoring device based on fine deformation monitoring

Abstract

The utility model discloses a wind turbine generator bolt load monitoring device based on fine deformation monitoring, which comprises a data communication unit, a plurality of transmitting module units and a plurality of sensor ends, each sensor end comprises a lower bearing body, a top end cover, a high-precision strain resistance bridge, a fine deformation beam and a lifting pin, and the side surface of the lower bearing body is in a circular ring shape. The top end cover is installed at the first end of the lower bearing body, the lower bearing body is provided with a hollow space on the inner side of the top end cover, the lower bearing body is provided with a plurality of through lifting pin holes in the radial direction, the lifting pins are placed in the lifting pin holes, the fine deformation beam is installed at the top of the lower bearing body, and the first ends of the lifting pins make contact with the fine deformation beam. The second end of the lifting pin protrudes out of the second end of the lower bearing body and makes contact with a nut to be monitored, and the high-precision strain resistance bridge is pasted on the fine deformation beam and used for outputting a sensor end signal. And each transmitting module unit at least acquires one path of sensor end signal and performs data optimization and data fidelity processing on the sensor end signal.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind turbine generator set monitoring, and particularly to a wind turbine generator set bolt load monitoring device based on subtle deformation monitoring. BACKGROUND

[0002] Following the demand of national green energy development strategy, the installed capacity of wind turbine generators in China increases substantially every year. The daily operation of large-scale wind turbine generator groups will inevitably bring great unit operation and maintenance demand. In order to reduce the maintenance workload, wind turbine generator manufacturers improve design quality, adopt advanced design technology, and strictly control production process, so as to improve the quality and operation stability of each component of wind turbine generator. More and more functional or structural components in wind turbine generators under existing process have adopted maintenance-free production and installation technology to reduce subsequent operation and maintenance workload.

[0003] In addition to relying on the product quality, daily operation and maintenance precision of the unit itself, the operation health status of the unit can also be monitored in real time through technical monitoring means to reduce the operation and maintenance workload and improve the overall power generation efficiency. The connection between each component of the unit is usually connected in cooperation by bolt fastening, such as the connection between the hub variable pitch bearing and the blade, the connection between the generator set and the main frame, the connection between each layer of tower, and the bolt connection between each component. Each component requires pre-tightening force and related maintenance detection every inspection cycle. There are many fastening bolts on each unit, and frequent torque or looseness inspection will increase a lot of workload. At the same time, it is difficult to find bolts that are loose but not completely separated through daily simple inspection, and even loose bolts may not be visually judged. The existing bolt looseness monitoring products on the market are mostly "on-off" type, and the bolt has already loosened when the looseness alarm is generated, which cannot early warn the looseness. Under the current production background, it is necessary to develop a technical product with low investment cost, high monitoring precision, and early warning. UTILITARIAN CONTENT

[0004] The utility model provides a kind of wind turbine generator set bolt load monitoring device based on subtle deformation monitoring to solve the technical problems existing in the above prior art.

[0005] To achieve the above purpose, the utility model provides a kind of wind turbine generator set bolt load monitoring device based on subtle deformation monitoring, it includes data communication unit, multiple transmission module unit and multiple sensor end,

[0006] The sensor end comprises a lower supporting body, a top end cover, a high-precision strain resistance bridge, a fine deformation beam and a top pin, the side surface of the lower supporting body is annular, the top end cover is installed at the first end of the lower supporting body, the lower supporting body is provided with a hollow space inside the top end cover, the lower supporting body is provided with a plurality of top pin holes penetrating in the radial direction, the top pin is placed in the top pin hole, the hollow space is used for installing the fine deformation beam and the high-precision strain resistance bridge, the fine deformation beam is installed at the top of the lower supporting body, the first end of the top pin is in contact with the fine deformation beam, the second end of the top pin protrudes from the second end of the lower supporting body and is in contact with the nut to be monitored, the high-precision strain resistance bridge is pasted on the fine deformation beam, and the high-precision strain resistance bridge is used for outputting the sensor end signal,

[0007] The top end cover and the lower supporting body are provided with thread holes matched in position, the thread holes are used for being connected with external screws during use, so that the bolt load monitoring device and the nut to be monitored which is not loosened are relatively static,

[0008] Each transmission module unit collects at least one sensor end signal and performs data optimization and data fidelity processing on the sensor end signal, and each transmission module unit is connected with a data communication unit,

[0009] The data communication unit is connected with an upper computer control system.

[0010] In an embodiment of the utility model, the sensor end monitors the bolt rotation angle precision less than 1 DEG, and the bolt rotation displacement precision is less than 10 mu m.

[0011] In an embodiment of the utility model, the lower supporting body and the top end cover are manufactured by using materials capable of shielding electromagnetic interference.

[0012] In an embodiment of the utility model, the lower supporting body and the top end cover are manufactured by using materials capable of shielding electromagnetic interference.

[0013] In an embodiment of the utility model, the side surface of the lower supporting body is further provided with a fastening hole penetrating through, and the fastening hole is used for installing a top screw to further fasten the lower supporting body.

[0014] The bolt load monitoring device for wind turbine generator based on fine deformation monitoring can accurately monitor the loosening state of the bolt, can alarm at the first time when the nut is loosened, has low manufacturing cost, simple installation and strong practical value. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0016] Figure 1 It is an overall connection relationship schematic diagram of the bolt load monitoring device of the wind turbine generator based on fine deformation monitoring of an embodiment of the present application.

[0017] Figure 2A It is a perspective view of the sensor end of an embodiment of the present application.

[0018] Figure 2B It is a sectional view of the sensor end of an embodiment of the present application.

[0019] Figure 2C It is a top view of the sensor end of an embodiment of the present application.

[0020] Figure 2D It is a side view of the sensor end of an embodiment of the present application.

[0021] Figure 3 It is a schematic view of the top end cover of an embodiment of the present application.

[0022] Figure 4A It is a perspective view of the top pin of an embodiment of the present application.

[0023] Figure 4B It is a front view of the top pin of an embodiment of the present application.

[0024] Figure 4C It is a side view of the top pin of an embodiment of the present application.

[0025] Figure 5A It is a perspective view of the fine deformation beam of an embodiment of the present application.

[0026] Figure 5B It is a top view of the fine deformation beam of an embodiment of the present application.

[0027] Figure 5C It is a side view of the fine deformation beam of an embodiment of the present application.

[0028] Figure 6A It is a perspective view of the lower bearing body of an embodiment of the present application.

[0029] Figure 6B It is a top view of the lower bearing body of an embodiment of the present application.

[0030] Figure 6C is a side view of the lower body of an embodiment of the utility model;

[0031] Figure 7 is a use state diagram of the bolt load monitoring device of a wind turbine generator based on fine deformation monitoring of an embodiment of the utility model.

[0032] Explanation of reference numerals: 1-data communication unit; 2-transmitting module unit; 3-sensor end; 4-fastening hole; 31-lower body; 32-top end cover; 33-high-precision strain resistance bridge; 34-fine deformation beam; 35-top pin; hollow space A; top pin hole 311; threaded hole B; external screw rod C; nut to be monitored D; 321, 322, 323-mounting hole. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] As Figure 1 shown is a whole connection relation schematic diagram of the bolt load monitoring device of a wind turbine generator based on fine deformation monitoring of an embodiment of the utility model. The bolt load monitoring device of a wind turbine generator based on fine deformation monitoring provided by the utility model comprises a data communication unit 1, a plurality of transmitting module units 2 and a plurality of sensor ends 3. Figure 1 It can be seen that each transmitting module unit 2 is connected with a plurality of sensor ends 3, the data communication unit 1 is connected with a plurality of transmitting module units 2,

[0035] Figure 2A is a perspective view of the sensor end of an embodiment of the utility model. Figure 2B is a sectional view of the sensor end of an embodiment of the utility model, Figure 2C is a top view of the sensor end of an embodiment of the utility model, Figure 2D is a side view of the sensor end of an embodiment of the utility model, as Figures 2A-2D shown, the sensor end 3 comprises a lower body 31, a top end cover 32, a high-precision strain resistance bridge 33, a fine deformation beam 34 and a top pin 35, the side surface of the lower body 31 is annular, as Figure 3As shown is the schematic diagram of the top end cover of an embodiment of the utility model, the top end cover 32 is installed at the first end of the lower bearing body 31, the lower bearing body 31 is provided with a hollow space A inside the top end cover 32, the lower bearing body 31 is provided with a plurality of top pin holes 311 in the radial direction, the top pin 35 is placed in the top pin hole 311, the top pin hole 311 limits the activity and placement of the top pin 35, the hollow space A is used for installing the fine deformation beam 34 and the high-precision strain resistance bridge 35, the fine deformation beam 34 is installed at the top of the lower bearing body 31, the first end of the top pin 35 contacts the fine deformation beam 34, the second end of the top pin 35 protrudes from the second end of the lower bearing body 31 and contacts the nut D to be monitored, as shown Figure 4A 、 Figure 4B 、 Figure 4C As shown are the perspective view, the front view and the side view of the top pin of an embodiment of the utility model respectively, the high-precision strain resistance bridge 33 is pasted on the fine deformation beam 34, the high-precision strain resistance bridge 33 is used for outputting the sensor end signal, as shown Figure 5A 、 Figure 5B 、 Figure 5C As shown are the perspective view, the top view and the side view of the fine deformation beam of an embodiment of the utility model respectively, as shown Figure 6A 、 Figure 6B 、 Figure 6C As shown are the perspective view of the lower bearing body of an embodiment of the utility model.

[0036] Figure 7 As shown is the use state diagram of the wind turbine bolt load monitoring device based on fine deformation monitoring of an embodiment of the utility model, the top end cover 32 and the lower bearing body 31 are provided with the thread hole B matched in position, the thread hole B is used for connecting with the external screw rod C during use, so that the bolt load monitoring device and the nut D to be monitored that is not loosened are relatively static, when the nut D to be monitored is loosened, the nut D to be monitored rotates out towards the sensor end, then the force is applied to the top pin 35, the top pin 35 further triggers the fine deformation beam 34 to produce deformation, since the high-precision strain resistance bridge 33 is pasted on the fine deformation beam 34, the high-precision strain resistance bridge 33 outputs the sensor end signal due to the change of internal resistance value or the change of bridge section pressure difference,

[0037] Each variable sending module unit 2 collects at least one way sensor end signal and carries out data optimization and data fidelity processing on the sensor end signal, each variable sending module unit 2 is connected with the data communication unit 1,

[0038] The data communication unit 1 is connected with the host computer control system.

[0039] In an embodiment of the utility model, the sensor end monitoring bolt rotation angle precision is less than 1°, the monitoring bolt rotation displacement precision is less than 10 μm.

[0040] In an embodiment of the utility model, the lower bearing body and the top end cover are made of a material capable of shielding electromagnetic interference.

[0041] In an embodiment of the utility model, the lower bearing body 31 and the top end cover 32, and the fine deformation beam 34 and the lower bearing body 31 are all installed through bolts. Figure 2A 、 Figure 3 After the mounting hole 321 in the fine deformation beam 34 is installed with a bolt, the fine deformation beam 34 and the lower bearing body 31 can be connected. Figure 5A 、 Figure 5B After the mounting hole 322 in the fine deformation beam 34 is installed with a bolt, Figure 6B After the mounting hole 323 in the fine deformation beam 34 is installed with a bolt,

[0042] In an embodiment of the utility model, the side surface of the lower bearing body is further provided with a through fastening hole 4, the fastening hole 4 is used for installing a top screw to further fasten the lower bearing body, and the top screw is tightly pressed against the external screw rod C in the fine deformation monitoring sensor. Figure 7

[0043] In other embodiments, the bolt load monitoring device for wind turbine generators based on fine deformation monitoring provided by the utility model can be arranged on the nut D to be monitored through other modes, such as a hoop, sticking or switching, etc.

[0044] The bolt load monitoring device for wind turbine generators based on fine deformation monitoring provided by the utility model can accurately monitor the loosening state of the bolt, can alarm at the first time when the nut is loosened, has low manufacturing cost, simple installation, and has strong practical value.

[0045] Those skilled in the art can understand that the drawings are only schematic diagrams of an embodiment, and the modules or processes in the drawings are not necessarily necessary for implementing the utility model.

[0046] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the embodiment description, or can be correspondingly changed and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined as one module, or can be further split into multiple sub-modules.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.​

Claims

1. A wind turbine generator bolt load monitoring device based on subtle deformation monitoring, characterized in that, The bolt load monitoring device comprises a data communication unit, a plurality of transmission module units and a plurality of sensor ends, The sensor end comprises a lower supporting body, a top end cover, a high-precision strain resistance bridge, a fine deformation beam and a top pin, the side surface of the lower supporting body is annular, the top end cover is installed at the first end of the lower supporting body, the lower supporting body is provided with a hollow space inside the top end cover, the lower supporting body is provided with a plurality of top pin holes penetrating in the radial direction, the top pin is placed in the top pin hole, the hollow space is used for installing the fine deformation beam and the high-precision strain resistance bridge, the fine deformation beam is installed at the top of the lower supporting body, the first end of the top pin is in contact with the fine deformation beam, the second end of the top pin protrudes from the second end of the lower supporting body and is in contact with the nut to be monitored, the high-precision strain resistance bridge is pasted on the fine deformation beam, and the high-precision strain resistance bridge is used to output the sensor end signal, The top end cover and the lower supporting body are provided with position-matched threaded holes, the threaded holes are used for connecting with external screws during use, so that the bolt load monitoring device and the nut to be monitored which is not loosened are relatively static, Each transmission module unit collects at least one sensor end signal and performs data optimization and data fidelity processing on the sensor end signal, and each transmission module unit is connected with the data communication unit, The data communication unit is connected with the upper computer control system.

2. The wind turbine generator bolt load monitoring device based on subtle deformation monitoring according to claim 1, characterized by, The sensor end monitors the bolt rotation angle accuracy less than 1°, and the bolt rotation displacement accuracy less than 10μm.

3. The wind turbine generator bolt load monitoring device based on subtle deformation monitoring according to claim 1, characterized by, The lower supporting body and the top end cover are made of materials capable of shielding electromagnetic interference.

4. The wind turbine generator bolt load monitoring device based on subtle deformation monitoring according to claim 1, characterized by, The lower supporting body and the top end cover are installed through bolts.

5. The wind turbine generator bolt load monitoring device based on subtle deformation monitoring according to claim 1, characterized by, The side surface of the lower supporting body is further provided with a fastening hole penetrating through, and the fastening hole is used for installing a top pin to further fasten the lower supporting body.

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