A fault diagnosis device for wind turbines

Abstract

The present invention discloses a fault diagnosis device for a wind turbine generator, comprising a base, wherein the outer end of the base is connected to a movable seat via a generator shaft, and a blade is fixed to the outer side of the movable seat, a first mounting ring and a second mounting ring are sleeved on the movable seat, and the first mounting ring and the second mounting ring are respectively arranged on the inner and outer sides of the blade; the movable rod is installed through the first mounting ring and the second mounting ring, and the protruding position of the outer end of the movable rod is connected to the outer side of the second mounting ring via an elastic telescopic rod, the first mounting ring and the second mounting ring are both provided with a mounting tube which is rotatably embedded via a torsion spring, and a shooting assembly is provided on one side of the hammer head. During operation, the fault diagnosis device for a wind turbine generator strikes the blades in real time, diagnoses the blades through vibration feedback, and simultaneously uses a high-definition camera to shoot and diagnose the outer surface of the blades.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine diagnosis, and in particular to a fault diagnosis device for a wind turbine. Background Art

[0002] Wind turbines are new energy generators that generate electricity based on wind power. They primarily use high-altitude wind to propel blades to rotate, working in conjunction with generators to generate electricity. During the use of wind turbines, blades are subject to the complex external environment for extended periods, making them susceptible to damage such as erosion, cracks, and impacts. Severe damage can affect the normal operation of the blades and even damage the entire device. Consequently, online fault diagnosis devices are required to diagnose the blade status in real time to prevent malfunctions. However, existing fault diagnosis devices have the following problems when used:

[0003] Acoustic vibration and image monitoring technology are the conventional diagnostic methods for wind turbine blades. However, existing fault diagnosis devices are not convenient for making convenient diagnostic adjustments to cope with wind speed. The rotation speed of the blades changes accordingly with the different wind speeds at high altitudes, and thus the vibration amplitude will also change. If these changes are not intervened, they will seriously affect the subsequent calculation analysis and diagnosis, affecting the accuracy. At the same time, affected by the length and shape of the blades, the existing fault diagnosis devices are not convenient for image diagnosis of the entire blade. The diagnostic area is limited and it is difficult to represent the damage condition of the entire blade, which is also one of the reasons affecting its accuracy.

[0004] In response to the above problems, it is urgent to carry out innovative design based on the original fault diagnosis device. Summary of the Invention

[0005] The purpose of the present invention is to provide a fault diagnosis device for a wind turbine to solve the problem that the existing fault diagnosis device proposed in the above background technology is not convenient for making convenient diagnostic adjustments to the wind speed and is not convenient for performing image diagnosis of the entire blade. The technical solution of the present invention addresses the technical problem that the existing technical solution is too single and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fault diagnosis device for a wind turbine generator, comprising a base, an outer end of the base being connected to a movable seat via a generator shaft, a blade being fixed to the outer side of the movable seat, a first mounting ring and a second mounting ring being sleeved on the movable seat, and the first mounting ring and the second mounting ring being respectively arranged on the inner and outer sides of the blade;

[0007] The movable rod is further comprised of a movable rod, the movable rod being installed through the first mounting ring and the second mounting ring, and the outer protruding position of the movable rod is connected to the outer side of the second mounting ring through an elastic telescopic rod, the first mounting ring and the second mounting ring are both provided with mounting tubes which are rotated by torsion springs, and the mounting tubes are sleeved with hammer heads, and a shooting assembly is provided on one side of the hammer head, and the shooting assembly is used to shoot the blades at multiple angles;

[0008] A rotating assembly is embedded in the mounting tube, and the rotating assembly drives the mounting tube to rotate through the movement of the movable rod;

[0009] The pushing component is arranged between the base and the inner end of the movable rod, and the pushing component is used to push the movable rod to move.

[0010] Preferably, the first mounting ring and the second mounting ring are connected via a connecting rod, and the first mounting ring and the second mounting ring are mounted on the movable seat in a hoop structure.

[0011] Preferably, the first mounting ring and the second mounting ring have built-in vibration sensors and signal transmission modules for sensing vibrations generated by the hammer head striking the blades and transmitting the vibrations to the ground processor.

[0012] Preferably, the shooting assembly includes a gear sleeve, and the gear sleeve is mounted on the mounting tube, the outer side of the gear sleeve is engaged with a gear roller, and the gear roller is embedded and rotatably mounted in the first mounting ring and the second mounting ring, a shooting seat is mounted on the gear roller, and a high-definition camera is fixed to the outer end of the shooting seat.

[0013] Preferably, the shooting seat and the hammer head are initially arranged in opposite directions on the first mounting ring and the second mounting ring, and the shooting seat and the hammer head on the first mounting ring and the second mounting ring move in opposite directions.

[0014] Preferably, the rotating assembly includes a movable column, and the movable column is embedded and slidingly installed in the first mounting ring and the second mounting ring. A first push head is provided at the outer end of the movable column, and the first push head is fixed on the movable rod. A guide head is fixed on the outer side of the inner end of the movable column, and the guide head is located in the guide groove, and the guide groove is opened on the inner wall of the mounting cylinder.

[0015] Preferably, the first push head is designed as a hemispherical structure, the guide head slides in the guide groove, and the guide groove is designed as a spiral structure, and the spiral directions of the guide grooves in the first mounting ring and the second mounting ring are opposite.

[0016] Preferably, the pushing assembly includes a third mounting ring, and the third mounting ring is sleeved on the base, the outer side of the third mounting ring is connected to a push ring through an electric push rod, and the outer side of the push ring is fixed with a second push head.

[0017] Preferably, a wind speed sensor and a single chip microcomputer are provided on the third mounting ring. The wind speed sensor senses the wind speed and controls the operation of the electric push rod through the single chip microcomputer to adjust the distance between the push ring and the movable rod.

[0018] Preferably, the second pusher head is arranged on the movable track of the movable rod, and the second pusher head is designed to be a hemispherical structure, and the distribution number of the second pusher heads corresponds to the number of blades.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This invention utilizes the rotation of the blade to drive the first and second mounting rings via the movable seat, which in turn drives the hammer head and high-definition camera to reciprocate in response to the force applied to the movable rod. This allows for blade diagnosis through feedback on vibration amplitude and further diagnostics by taking high-definition photos of various sections of the blade. These two methods work together to better diagnose both the external and internal conditions of the blade, improving diagnostic efficiency.

[0021] 2. The present invention takes into account the impact of different wind speeds and blade rotation speeds on vibration. By detecting the high-altitude wind speed, the position of the push ring and the second push head is adjusted, and then the moving range of the movable rod is adjusted to adjust the movable range of the hammer head to compensate for the impact of different wind speeds. That is, the greater the wind speed, the smaller the hammering degree of the hammer head on the blade, ensuring stable amplitude feedback of the blade under normal circumstances. On this basis, the subsequent diagnostic steps are simplified, the difficulty is reduced, and the accuracy of blade diagnosis is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the side sectional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the side sectional structure of the movable seat of the present invention;

[0024] Figure 3 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0025] Figure 4 This is a schematic side sectional view of the first mounting ring of the present invention;

[0026] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0027] Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle;

[0028] Figure 7 It is a schematic diagram of the side structure of the push ring of the present invention.

[0029] In the figure: 1. base; 2. movable seat; 3. blade; 4. first mounting ring; 5. second mounting ring; 51. connecting rod; 6. movable rod; 61. elastic telescopic rod; 7. mounting tube; 8. hammer head; 91. gear sleeve; 92. gear roller; 93. shooting seat; 94. high-definition camera; 101. movable column; 102. first push head; 103. guide head; 104. guide groove; 111. third mounting ring; 112. electric push rod; 113. push ring; 114. second push head. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides a technical solution: a fault diagnosis device for a wind turbine, comprising a base 1, a movable base 2, a blade 3, a first mounting ring 4, a second mounting ring 5, a connecting rod 51, a movable rod 6, an elastic telescopic rod 61, a mounting tube 7, a hammer head 8, a gear sleeve 91, a gear roller 92, a shooting base 93, a high-definition camera 94, a movable column 101, a first pushing head 102, a guide head 103, a guide groove 104, a third mounting ring 111, an electric push rod 112, a push ring 113 and a second pushing head 114.

[0032] Example 1: Please refer to Figure 1-Figure 7The outer end of the base 1 is connected to the movable seat 2 through the generator shaft, and the outer side of the movable seat 2 is fixed with a blade 3. The movable seat 2 is provided with a first mounting ring 4 and a second mounting ring 5, and the first mounting ring 4 and the second mounting ring 5 are respectively arranged on the inner and outer sides of the blade 3; the movable rod 6 is installed through the first mounting ring 4 and the second mounting ring 5, and the outer end of the movable rod 6 is connected to the outer side of the second mounting ring 5 through an elastic telescopic rod 61. The first mounting ring 4 and the second mounting ring 5 are both provided with a mounting tube 7 through a torsion spring embedded rotation, and the mounting tube 7 is provided with a hammer head 8; the rotating assembly is embedded in the mounting tube 7, and the rotating assembly is rotated by the movable rod 6 drives the mounting tube 7 to rotate; the pushing assembly is arranged between the base 1 and the inner end of the movable rod 6, and the pushing assembly is used to push the movable rod 6 to move; the first mounting ring 4 and the second mounting ring 5 are connected by a connecting rod 51, and the first mounting ring 4 and the second mounting ring 5 are mounted on the movable seat 2 using a clamp structure; the first mounting ring 4 and the second mounting ring 5 have built-in vibration sensors and signal transmission modules for sensing the vibration generated by the hammer head 8 hitting the blade 3 and transmitting it to the ground processor; when in use, the blade 3 drives the movable seat 2 to rotate, which can drive the hammer head 8 to reciprocate, causing the blade 3 to vibrate, and the blade 3 is diagnosed using vibration feedback;

[0033] The rotating assembly includes a movable column 101, and the movable column 101 is embedded and limitedly slidably installed in the first mounting ring 4 and the second mounting ring 5. A first push head 102 is provided at the outer end of the movable column 101, and the first push head 102 is fixed on the movable rod 6. A guide head 103 is fixed to the outer side of the inner end of the movable column 101, and the guide head 103 is located in the guide groove 104, and the guide groove 104 is provided on the inner wall of the mounting cylinder 7; the first push head 102 is designed to be a hemispherical structure, the guide head 103 fits and slides in the guide groove 104, and the guide groove 104 is designed to be a spiral structure, and the spiral directions of the guide grooves 104 in the first mounting ring 4 and the second mounting ring 5 are opposite; when the movable rod 6 is moved by force, the movable column 101 can be driven to move by the first push head 102, and the mounting cylinder 7 can be driven to rotate by the guide head 103 and the guide groove 104, thereby driving the hammer head 8 to rotate and contact the blade 3;

[0034] The pushing assembly includes a third mounting ring 111, and the third mounting ring 111 is sleeved on the base 1. The outer side of the third mounting ring 111 is connected to a push ring 113 through an electric push rod 112, and a second push head 114 is fixed to the outer side of the push ring 113; a wind speed sensor and a single-chip microcomputer are provided on the third mounting ring 111. The wind speed sensor senses the wind speed and controls the operation of the electric push rod 112 through the single-chip microcomputer to adjust the distance between the push ring 113 and the movable rod 6; the second push head 114 is provided on the movable trajectory of the movable rod 6, and the second push head 114 is designed to be a hemispherical structure, and the distribution number of the second push heads 114 corresponds to the number of blades 3; when the movable seat 2 rotates, the movable rod 6 contacts the second push head 114, which can drive the movable rod 6 to reciprocate. At the same time, in conjunction with the wind speed sensor and the single-chip microcomputer, the initial position of the push ring 113 and the second push head 114 is adjusted by the electric push rod 112 to change the movable distance of the movable rod 6, thereby changing the rotation angle of the hammer head 8.

[0035] Example 2: Based on Example 1, please refer to Figure 1-Figure 5 A shooting assembly is provided on one side of the hammer head 8, and the shooting assembly is used to shoot the blade 3 from multiple angles; the shooting assembly includes a gear sleeve 91, and the gear sleeve 91 is sleeved on the mounting tube 7, the outer side of the gear sleeve 91 is meshed with a gear roller 92, and the gear roller 92 is embedded and rotatably installed in the first mounting ring 4 and the second mounting ring 5, a shooting seat 93 is installed on the gear roller 92, and a high-definition camera 94 is fixed to the outer end of the shooting seat 93; the shooting seat 93 and the hammer head 8 are initially arranged in opposite directions on the first mounting ring 4 and the second mounting ring 5, and the shooting seat 93 and the hammer head 8 on the first mounting ring 4 and the second mounting ring 5 move in opposite directions; when the movable rod 6 moves and drives the mounting tube 7 to rotate, the shooting seat 93 and the high-definition camera 94 can be driven to rotate by the gear sleeve 91 and the gear roller 92 to take pictures and diagnose the outside of the blade 3.

[0036] Working principle: When using the fault diagnosis device for wind turbines, first, when the blade 3 is driven by wind to rotate the movable seat 2 on the base 1, the first mounting ring 4 and the second mounting ring 5 are driven to rotate, and the movable rod 6 follows the rotation and intermittently contacts the second push head 114 on the push ring 113, and cooperates with the elastic telescopic rod 61 to make the movable rod 6 move back and forth, and the first push head 102 on the movable rod 6 contacts the movable column 101, so that the guide head 103 slides in the guide groove 104, thereby driving the installation cylinder 7 to rotate, and cooperates with the torsion spring structure of the installation cylinder 7 itself to achieve installation. The reciprocating rotation of the mounting cylinder 7 drives the hammer head 8 to reciprocate, and contacts the blade 3 to generate vibration. The vibration signal is transmitted to the ground through the built-in vibration sensor and the signal transmission module, and the vibration signal of the blade 3 is analyzed. Furthermore, the rotation of the mounting cylinder 7 drives the shooting seat 93 to rotate through the gear sleeve 91 and the gear roller 92, thereby driving the high-definition camera 94 to move. The high-definition camera 94 captures the images of the internal and external areas of the blade 3 and transmits them to the ground for analysis and diagnosis. It should be noted that the vibration and image diagnosis methods adopt existing technologies and are not described in detail here.

[0037] Due to the difference in wind force, the rotation speed of the blade 3 is also different, and the difference in vibration amplitude generated by the contact between the hammer head 8 and the blade 3 will also increase. In order to compensate for this difference, the high-altitude wind speed is sensed by a wind speed sensor, and the position of the push ring 113 is adjusted by the electric push rod 112, so that the moving distance when the movable rod 6 contacts the second push head 114 is adjusted, and then the hammering range of the hammer head 8 is adjusted, that is, the greater the wind speed, the smaller the hammering range of the hammer head 8. Rubber material is set at the end of the hammer head 8 so that it can contact the blade and generate vibration within different movable ranges. Then, when the hammer head 8 contacts the blade 3, the smaller the vibration it generates, the smaller the vibration generated by its rotation speed compensates each other, ensuring a stable amplitude in a good state, which is convenient for data comparison and diagnosis.

[0038] Any content not described in detail in this specification is prior art known to those skilled in the art. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation and are therefore not to be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified or limited, the terms "connected" and "connected" are to be understood broadly, meaning, for example, fixedly connected, detachably connected, or integrally connected; mechanically connected, electrically connected; directly connected, or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention on a case-by-case basis.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fault diagnosis device for a wind turbine generator, comprising a base (1), wherein the outer end of the base (1) is connected to a movable base (2) via a generator shaft, and a blade (3) is fixed to the outer side of the movable base (2), and a first mounting ring (4) and a second mounting ring (5) are sleeved on the movable base (2), and the first mounting ring (4) and the second mounting ring (5) are respectively arranged on the inner and outer sides of the blade (3); Its characteristics are: It also includes a movable rod (6), which is installed through the first mounting ring (4) and the second mounting ring (5), and the outer protruding position of the movable rod (6) is connected to the outer side of the second mounting ring (5) through an elastic telescopic rod (61), and the first mounting ring (4) and the second mounting ring (5) are both provided with a mounting tube (7) through a torsion spring embedded rotation, and a hammer head (8) is sleeved on the mounting tube (7), and a shooting component is provided on one side of the hammer head (8), and the shooting component is used to shoot the blade (3) at multiple angles, and the first mounting ring (4) and the second mounting ring (5) are built-in with a vibration sensor and a signal transmission module, which are used to sense the vibration generated by the hammer head (8) hitting the blade (3) and transmit it to the ground processor; A rotating assembly, wherein the rotating assembly is embedded in the mounting tube (7), and the rotating assembly drives the mounting tube (7) to rotate by moving the movable rod (6), the rotating assembly includes a movable column (101), and the movable column (101) is embedded and limitedly slidably installed in the first mounting ring (4) and the second mounting ring (5), the outer end of the movable column (101) is provided with a first push head (102), and the first push head (102) is fixed on the movable rod (6), the outer side of the inner end of the movable column (101) is fixed with a guide head (103), and the guide head (103) is located in the guide groove (104), and the guide groove (104) is opened on the inner wall of the mounting tube (7), the first push head (102) is designed as a hemispherical structure, the guide head (103) slides in the guide groove (104), and the guide groove (104) is designed as a spiral structure, and the spiral directions of the guide grooves (104) in the first mounting ring (4) and the second mounting ring (5) are opposite; A pushing assembly is provided between the base (1) and the inner end of the movable rod (6), and the pushing assembly is used to push the movable rod (6) to move. The pushing assembly includes a third mounting ring (111), and the third mounting ring (111) is sleeved on the base (1). The outer side of the third mounting ring (111) is connected to a push ring (113) via an electric push rod (112), and a second push head (114) is fixed to the outer side of the push ring (113). A wind speed sensor and a single-chip microcomputer are provided on the third mounting ring (111). The wind speed sensor senses the wind speed and controls the electric push rod (112) to operate through the single-chip microcomputer, thereby adjusting the distance between the push ring (113) and the movable rod (6).

2. A fault diagnosis device for a wind turbine according to claim 1, characterized in that: The first mounting ring (4) and the second mounting ring (5) are connected via a connecting rod (51), and the first mounting ring (4) and the second mounting ring (5) are sleeved and mounted on the movable seat (2) using a hoop structure.

3. A fault diagnosis device for a wind turbine according to claim 1, characterized in that: The shooting assembly comprises a gear sleeve (91), and the gear sleeve (91) is sleeved on the mounting tube (7); a gear roller (92) is meshed on the outer side of the gear sleeve (91), and the gear roller (92) is embedded and rotatably mounted in the first mounting ring (4) and the second mounting ring (5); a shooting seat (93) is mounted on the gear roller (92), and a high-definition camera (94) is fixed to the outer end of the shooting seat (93).

4. A fault diagnosis device for a wind turbine according to claim 3, characterized in that: The shooting seat (93) and the hammer head (8) are initially arranged in opposite directions on the first mounting ring (4) and the second mounting ring (5), and the shooting seat (93) and the hammer head (8) on the first mounting ring (4) and the second mounting ring (5) move in opposite directions.

5. The fault diagnosis device for a wind turbine according to claim 1, characterized in that: The second pusher head (114) is arranged on the movable track of the movable rod (6), and the second pusher head (114) is designed as a hemispherical structure, and the number of the second pusher heads (114) corresponds to the number of blades (3).

Images