Blade root bolt state monitoring device for wind generating set

Abstract

The utility model belongs to the technical field of wind generating set equipment, and particularly relates to a wind generating set blade root bolt state monitoring device which is installed on a connecting flange, the connecting flange comprises an upper flange and a lower flange, and a bolt assembly comprises a connecting bolt and a connecting nut. The connecting nut sleeves the connecting bolt in a threaded connection manner; the blade root bolt state monitoring device of the wind generating set comprises a mounting base and a lantern ring, the lantern ring is matched with a connecting nut, the blade root bolt state monitoring device of the wind generating set further comprises a monitoring body, the monitoring body comprises a shell, the shell is detachably and fixedly clamped in the mounting base, and the mounting base is fixedly mounted on a connecting flange; a supporting plate is fixedly installed on one side of the lantern ring, and a guide column is fixedly arranged at the end of the supporting plate. The monitoring device provided by the utility model is convenient to install, and when the connecting nut rotates loosely, the loosening condition of the connecting nut can be monitored in real time.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind generator set equipment, and in particular relates to a wind generator set blade root bolt state monitoring device. Background Art

[0002] At present, flange connection refers to a detachable connection in which flanges, gaskets and bolts are interconnected as a combined sealing structure. The flange connection structure is extremely common in the current industrial field and is widely used in fields such as wind power.

[0003] In the prior art, the blades are mounted on the inner ring of the pitch bearing by bolts, and the outer ring of the pitch bearing is mounted on the hub by bolts; the connecting bolts may become loose due to long-term alternating loads or occasional large loads beyond the design range, and the tightening state of the bolts directly affects the working performance of the equipment. If the bolts are loose or broken, it may cause serious equipment damage; especially in various wind farm safety accidents, accidents such as tower collapse and blade falling caused by loose and broken bolts often occur.

[0004] At present, the torque method and line marking method are commonly used in the loosening monitoring technology of bolt connections. These methods are relatively traditional. Although they can detect the loosening of bolts, their operation is often complicated and can easily lead to errors in the monitoring results, and they cannot provide early warnings in time, so their efficiency is low. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a device for monitoring the status of blade root bolts of a wind turbine generator set, aiming to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model provides the following technical solutions.

[0007] A wind turbine blade root bolt condition monitoring device, the wind turbine blade root bolt condition monitoring device is installed on a connecting flange, the connecting flange includes an upper flange and a lower flange, the bolt assembly includes a connecting bolt and a connecting nut, and the connecting nut is sleeved on the connecting bolt by a threaded connection;

[0008] The wind turbine blade root bolt condition monitoring device comprises a mounting base and a collar, wherein the collar cooperates with a connecting nut.

[0009] It also includes a monitoring body, which includes a shell, and the shell is detachably fixed and clamped in the mounting base, wherein the mounting base is fixedly mounted on the connecting flange;

[0010] A support plate is fixedly installed on one side of the collar, and a guide column is fixedly arranged on the end of the support plate;

[0011] The monitoring body also includes a communication module, which is fixedly mounted on the shell; a limit pressure plate is fixedly arranged inside the shell, a magnetic sensor is installed on the inner wall of the limit pressure plate, a connecting rod is slidably arranged through the shell, a magnetic core is installed on the connecting rod located inside the shell, a displacement frame is installed at the end of the connecting rod located outside the shell, and the displacement frame is slidably sleeved on the guide column.

[0012] Furthermore, a pressure rod is fixedly installed on the shell, and a pressure ring matching the ring is fixedly provided on the lower surface of the pressure rod. When the shell is installed on the mounting base, the pressure ring is pressed tightly on the ring to limit the ring on the connecting nut and prevent the ring from slipping off the connecting nut.

[0013] Furthermore, the shell is installed in the mounting base, and a limiting block is fixed on the outer wall of the limiting block. The shell placed on the mounting base is fixed by a limiting pressure plate that cooperates with the limiting block. The limiting pressure plate is provided with a limiting groove that cooperates with the limiting block. After the shell is placed on the mounting base, the limiting pressure plate is pressed tightly against the shell, and the side of the limiting pressure plate is fixed to the limiting block through the limiting groove, so that the shell can be fixed on the mounting base.

[0014] Furthermore, a first guide rod is fixedly mounted on the displacement frame, and the first guide rod penetrates and slides into the shell to guide the movement of the displacement frame.

[0015] Furthermore, the magnetic sensor is a Hall sensor, and the magnetic sensor and the communication module are electrically connected through a wire. The communication module uses wireless transmission to send the acquired monitoring signal to the monitoring terminal. The staff can judge the looseness of the bolts through the data received by the monitoring terminal.

[0016] Furthermore, a second guide rod is fixedly arranged in the limit pressure plate, and the connecting rod located in the shell is slidably sleeved on the second guide rod, and the second guide rod is used to guide the displacement of the connecting rod.

[0017] Furthermore, a bolt groove corresponding to the connecting hole is formed on the lower flange, and the bolt head of the connecting bolt is pressed against the bolt groove to prevent the connecting bolt from rotating.

[0018] Compared with the prior art, the beneficial effects of the wind turbine blade root bolt status monitoring device of the utility model are:

[0019] First, when installing the monitoring device, first position the guide column toward the direction of the mounting base, and after positioning, the sleeve ring is sleeved on the connecting nut; then the housing is installed on the mounting base, and when the housing is installed on the mounting base, the pressure ring on the pressure rod is pressed on the sleeve ring, and the installation work of the monitoring device of the utility model is completed;

[0020] Second, when the connecting nut rotates loosely, it will drive the ring to rotate. The movement of the guide column will push the displacement frame to move, push the connecting rod to move, and make the magnetic core move relative to the magnetic sensor. The magnetic sensor of the Hall sensor is used to cut the induction wire. The Hall sensor will send the signal of the movement of the connecting rod to the monitoring terminal through the communication module, thereby realizing real-time monitoring of the looseness of the connecting nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural diagram of a wind turbine blade root bolt status monitoring device according to the utility model;

[0022] Figure 2 It is a partial structural schematic diagram of the blade root bolt status monitoring device of the utility model for wind turbine generator set;

[0023] Figure 3 This is a structural schematic diagram of the installation base in the blade root bolt status monitoring device of the wind turbine generator set of the utility model;

[0024] Figure 4 It is a structural schematic diagram of a limit pressure plate in a blade root bolt state monitoring device for a wind turbine generator set of the utility model;

[0025] Figure 5 This is an internal structural diagram of the monitoring body in the blade root bolt status monitoring device of the wind turbine generator set of the utility model;

[0026] Figure 6 It is a schematic diagram of the layout position of the wind turbine blade root bolt status monitoring device of the utility model;

[0027] Figure 7 for Figure 6 A top view of

[0028] Figure 8 It is a structural schematic diagram of the lower flange in the connecting flange of the utility model.

[0029] The reference numerals are as follows:

[0030] 100, connecting flange; 101, connecting bolt; 102, connecting nut; 103, bolt groove;

[0031] 200, mounting base; 201, limiting block;

[0032] 300, housing; 301, communication module; 302, displacement frame; 303, connecting rod; 304, first guide rod; 305, pressure rod; 3051, pressure ring; 306, limit pressure plate; 3061, limit groove; 307, magnetic sensor; 308, second guide rod; 309, magnetic core; 310, wire;

[0033] 400, sleeve ring; 401, support plate; 402, guide column. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0036] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, in an embodiment of the utility model, a wind turbine blade root bolt status monitoring device is provided, which is installed on a connecting flange 100 and is used to monitor the looseness of a bolt assembly installed on the connecting flange 100; wherein the connecting flange 100 includes an upper flange and a lower flange, and the bolt assembly includes a connecting bolt 101 and a connecting nut 102, and the connecting nut 102 is sleeved on the connecting bolt 101 by a threaded connection. During specific implementation, when the connecting hole of the upper flange is aligned with the connecting hole of the lower flange, the connecting bolt 101 is passed through the connecting hole, and then the connecting nut 102 is sleeved on the connecting bolt 101 and tightened to achieve the connection and fixation between the upper flange and the lower flange.

[0037] like Figure 8 As shown, the lower flange is also provided with a bolt groove 103 corresponding to the connecting hole, and the bolt head of the connecting bolt 101 is pressed against the bolt groove 103 to prevent the connecting bolt 101 from rotating.

[0038] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the wind turbine blade root bolt status monitoring device of the utility model includes a mounting base 200 and a collar 400. The collar 400 cooperates with the connecting nut 102. When the monitoring device is installed, the collar 400 is slidably mounted on the connecting nut 102. When the connecting nut 102 becomes loose and rotates, the collar 400 will rotate synchronously.

[0039] Furthermore, the wind turbine blade root bolt status monitoring device of the utility model also includes a monitoring body, which includes a shell 300 , and the shell 300 is detachably fixedly clamped in the mounting base 200 , wherein the mounting base 200 is fixedly mounted on the connecting flange 100 .

[0040] Please continue reading Figure 1-Figure 4The embodiment of the utility model also provides an implementation method for installing the shell 300 on the mounting base 200, the shell 300 is installed in the mounting base 200, the limiting block 201 is fixedly arranged on the outer wall of the limiting block 201, and the shell 300 placed on the mounting base 200 is fixed by a limiting pressure plate 306 that cooperates with the limiting block 201, and the limiting pressure plate 306 is provided with a limiting groove 3061 that cooperates with the limiting block 201. After the shell 300 is placed on the mounting base 200, the limiting pressure plate 306 is pressed tightly on the shell 300, and the side of the limiting pressure plate 306 is fixed to the limiting block 201 through the limiting groove 3061, so that the shell 300 can be fixed on the mounting base 200.

[0041] Furthermore, a pressure rod 305 is fixedly installed on the shell 300, and a pressure ring 3051 that cooperates with the ring 400 is fixedly provided on the lower surface of the pressure rod 305. When the shell 300 is installed on the mounting base 200, the pressure ring 3051 is pressed tightly on the ring 400 to limit the ring 400 on the connecting nut 102 to prevent the ring 400 from slipping off the connecting nut 102.

[0042] Preferably, in the embodiment of the utility model, a support plate 401 is fixedly installed on one side of the ring 400, and a guide column 402 is fixedly provided at the end of the support plate 401. It can be understood that when the connecting nut 102 loosens and rotates, the guide column 402 will move a certain distance along the path of circular motion.

[0043] like Figure 2 and Figure 5 As shown, in an embodiment of the utility model, the monitoring body also includes a communication module 301, which is fixedly mounted on the shell 300; a limit pressure plate 306 is fixedly arranged in the shell 300, and a magnetic sensor 307 is installed on the inner wall of the limit pressure plate 306; a connecting rod 303 is slidably arranged through the shell 300, a magnetic core 309 is installed on the connecting rod 303 located in the shell 300, and a displacement frame 302 is installed at the end of the connecting rod 303 located outside the shell 300, and the displacement frame 302 is slidably mounted on the guide column 402.

[0044] Furthermore, a first guide rod 304 is fixedly mounted on the displacement frame 302 , and the first guide rod 304 penetrates and slides into the housing 300 to guide the movement of the displacement frame 302 .

[0045] The magnetic sensor 307 is electrically connected to the communication module 301 via a wire 310. The communication module 301 transmits the acquired monitoring signal to the monitoring terminal by wireless transmission. The staff can determine the looseness of the bolts through the data received by the monitoring terminal.

[0046] The communication module 301 of the present invention adopts LoRa module technology. LoRa modules are widely used in Internet of Things (IoT) projects. The working principle of the LoRa module is based on a low-power, long-distance wireless communication technology, allowing devices to transmit data over a wide area.

[0047] Furthermore, when the monitoring body of the utility model is in use, the magnetic sensor 307 is a Hall sensor. By adopting the Hall sensor, it can be used in conjunction with the magnetic core 309 on the connecting rod 303 to monitor the displacement change of the connecting rod 303. Specifically, when the magnetic core 309 moves to the Hall sensor and cuts the induction line, the Hall sensor will send the signal generated by the movement of the connecting rod 303 to the monitoring terminal through the communication module 301.

[0048] Furthermore, a second guide rod 308 is fixedly disposed in the limiting pressure plate 306 , and the connecting rod 303 in the housing 300 is slidably sleeved on the second guide rod 308 , and the second guide rod 308 is used to guide the displacement of the connecting rod 303 .

[0049] To sum up, when installing the monitoring device of the present invention, the guide column 402 is first positioned in the direction of the mounting base 200, and after positioning, the ring 400 is sleeved on the connecting nut 102; then the shell 300 is installed on the mounting base 200. When the shell 300 is installed on the mounting base 200, the pressure ring 3051 on the pressure rod 305 will be pressed on the ring 400 to prevent the ring 400 from slipping off the connecting nut 102. At this time, the installation of the monitoring device of the present invention is completed; when the connecting nut 102 rotates loosely, it will drive the ring 400 to rotate, and the movement of the guide column 402 will push the displacement frame 302 to move, that is, push the connecting rod 303 to move, so that the magnetic core 309 moves relative to the magnetic sensor 307, and the magnetic sensor 307 using the Hall sensor cuts the induction line, and the Hall sensor sends the signal of the movement of the connecting rod 303 to the monitoring terminal through the communication module 301.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A wind turbine blade root bolt condition monitoring device, the wind turbine blade root bolt condition monitoring device is installed on a connecting flange (100), the connecting flange (100) comprises an upper flange and a lower flange, the bolt assembly comprises a connecting bolt (101) and a connecting nut (102), the connecting nut (102) is sleeved on the connecting bolt (101) by a threaded connection; the characteristics are: The wind turbine blade root bolt state monitoring device comprises a mounting base (200) and a collar (400), wherein the collar (400) cooperates with a connecting nut (102). It also includes a monitoring body, which includes a shell (300), the shell (300) is detachably fixedly clamped in the mounting base (200), and the mounting base (200) is fixedly mounted on the connecting flange (100); A support plate (401) is fixedly mounted on one side of the collar (400), and a guide column (402) is fixedly arranged at the end of the support plate (401); The monitoring body also includes a communication module (301), and the communication module (301) is fixedly mounted on the housing (300); A limit pressure plate (306) is fixedly arranged in the shell (300), a magnetic sensor (307) is installed on the inner wall of the limit pressure plate (306), a connecting rod (303) is slidably arranged through the shell (300), a magnetic core (309) is installed on the connecting rod (303) located in the shell (300), a displacement frame (302) is installed at the end of the connecting rod (303) located outside the shell (300), and the displacement frame (302) is slidably sleeved on the guide column (402).

2. A wind turbine blade root bolt status monitoring device according to claim 1, characterized in that: A pressure rod (305) is fixedly mounted on the housing (300), and a pressure ring (3051) matching with the sleeve ring (400) is fixedly arranged on the lower surface of the pressure rod (305).

3. A wind turbine blade root bolt status monitoring device according to claim 2, characterized in that: The shell (300) is installed in the installation base (200), and the limit block (201) is fixedly arranged on the outer wall of the limit block (201). The shell (300) placed on the installation base (200) is fixed by a limit pressure plate (306) matched with the limit block (201), and the limit pressure plate (306) is provided with a limit groove (3061) matched with the limit block (201).

4. The wind turbine blade root bolt status monitoring device according to claim 3 is characterized in that: A first guide rod (304) is also fixedly mounted on the displacement frame (302), and the first guide rod (304) penetrates and slides into the housing (300).

5. A wind turbine blade root bolt status monitoring device according to claim 4, characterized in that: The magnetic sensor (307) is a Hall sensor, and the magnetic sensor (307) is electrically connected to the communication module (301) via a wire (310).

6. A wind turbine blade root bolt status monitoring device according to claim 4 or 5, characterized in that: A second guide rod (308) is also fixedly disposed in the limit pressure plate (306), and the connecting rod (303) located in the housing (300) is slidably sleeved on the second guide rod (308).

7. A wind turbine blade root bolt status monitoring device according to any one of claims 1 to 5, characterized in that: The lower flange is also provided with a bolt groove (103) corresponding to the connection hole, and the bolt head of the connection bolt (101) is pressed against the bolt groove (103).

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