Fault diagnosis device for wind driven generator

Abstract

A fault diagnosis device for a wind driven generator disclosed by the present invention comprises a base, the outer end of the base is connected with a movable seat through a generator shaft, the outer side of the movable seat is fixedly provided with blades, and the movable seat is sleeved with a first mounting ring and a second mounting ring. The first mounting ring and the second mounting ring are arranged on the inner side and the outer side of the blade correspondingly. The movable rod is installed in the first installation ring and the second installation ring in a penetrating mode, the protruding position of the outer end of the movable rod is connected with the outer side of the second installation ring through an elastic telescopic rod, installation cylinders are rotationally arranged on the first installation ring and the second installation ring in an embedded mode through torsional springs, and a shooting assembly is arranged on one side of the hammering head. According to the fault diagnosis device for the wind driven generator, in the operation process, a blade is knocked in real time, the blade is diagnosed through vibration feedback, and meanwhile, the outer surface of the blade is shot and diagnosed in cooperation with a high-definition camera.

Description

Technical Field

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

[0002] Wind turbines are new energy units that generate electricity based on wind power. They mainly use high-altitude wind to drive the blades to rotate and cooperate with the generator to generate electricity. During the use of wind turbines, the blades are affected by the complex external environment for a long time and are prone to damage such as erosion, cracks and impact. In serious cases, it will affect the normal operation of the blades and cause damage to the entire equipment. In turn, it is necessary to diagnose the status of the blades in real time through an online fault diagnosis device to avoid faults. However, the existing fault diagnosis devices have the following problems when used: Acoustic vibration and image monitoring technology is a conventional diagnostic method 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 different high-altitude wind speeds, and thus their vibration amplitude also changes. If these changes are not intervened, they will seriously affect subsequent calculation analysis and diagnosis, affecting accuracy. At the same time, affected by the length and shape of the blades, 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.

[0003] In view of the above problems, it is urgent to carry out innovative design based on the original fault diagnosis device. Summary of the invention

[0004] The object 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 in response to wind speed and is not convenient for image diagnosis of the entire blade. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a fault diagnosis device for a wind turbine generator, comprising a base, the outer end of the base is connected to a movable seat through 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; It also includes a movable rod, which is installed in the first mounting ring and the second mounting ring, and the outer end of the movable rod is connected to the outer side of the second mounting ring through an elastic telescopic rod at a protruding position, and the first mounting ring and the second mounting ring are both provided with mounting tubes through a torsion spring embedded rotation, and the mounting tubes are sleeved with a hammer head, 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; A rotating assembly, wherein the 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; 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.

[0006] 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 by adopting a hoop structure.

[0007] 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.

[0008] 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 meshed 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.

[0009] 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.

[0010] Preferably, the rotating assembly includes a movable column, and the movable column is embedded and limitedly slidably installed in the first mounting ring and the second mounting ring, the outer end of the movable column is provided with a first push head, and the first push head is fixed on the movable rod, and 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.

[0011] 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.

[0012] 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 pushing ring via an electric push rod, and the outer side of the pushing ring is fixed with a second pushing head.

[0013] 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.

[0014] 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention utilizes the rotation of the blade to drive the first mounting ring and the second mounting ring to rotate through the movable seat, and cooperates with the force movement of the movable rod to drive the hammer head and the high-definition camera to reciprocate. On the one hand, the blade is diagnosed through the feedback of the vibration amplitude, and on the other hand, the high-definition photos of each section of the blade are taken to further diagnose. The two methods cooperate with each other, which can better diagnose the external and internal conditions of the blade and improve the diagnostic efficiency; 2. The present invention takes into account the impact of different wind speeds and blade rotation speeds on vibration, and detects the high-altitude wind speed to adjust the position of the push ring and the second push head, and then adjusts the moving range of the movable rod 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, thereby 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

[0016] Figure 1 It is a schematic diagram of the side section structure of the present invention; Figure 2 It is a schematic diagram of the side section structure of the movable seat of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the side sectional structure of the first mounting ring of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle; Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle; Figure 7 It is a schematic diagram of the side structure of the push ring of the present invention.

[0017] 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

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] 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 push 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 push head 114.

[0020] Example 1: Please refer to Figure 1-Figure 7The outer end of the base 1 is connected to a movable seat 2 through a generator shaft, and a blade 3 is fixed on the outer side of the movable seat 2. A first mounting ring 4 and a second mounting ring 5 are sleeved on the movable seat 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; a movable rod 6 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; the rotating assembly is embedded in the mounting tube 7, and the rotating assembly is rotated by the movable rod 6 drives the installation 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 sleeved and installed on the movable seat 2 with a hoop structure; the first mounting ring 4 and the second mounting ring 5 have built-in vibration sensors and signal transmission modules, which are used to sense the vibration generated by the hammer head 8 hitting the blade 3 and transmit 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, so that the blade 3 vibrates, and the blade 3 is diagnosed by using vibration feedback; 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 on 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 tube 7; the first push head 102 is designed as a hemispherical structure, the guide head 103 fits and 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; 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 tube 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; 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 the outer side of the push ring 113 is fixed with a second push head 114; a wind speed sensor and a single-chip microcomputer are arranged on the third mounting ring 111, and 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 arranged on the movable trajectory of the movable rod 6, and the second push head 114 is designed as a hemispherical structure, and the number of the second push heads 114 distributed 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, and at the same time, cooperate with the wind speed sensor and the single-chip microcomputer, adjust the initial position of the push ring 113 and the second push head 114 through the electric push rod 112, change the movable distance of the movable rod 6, and then change the rotation angle of the hammer head 8.

[0021] 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 at multiple angles; the shooting assembly includes 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; the shooting seat 93 and the hammer head 8 on the first mounting ring 4 and the second mounting ring 5 are initially arranged in opposite directions, 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 through the gear sleeve 91 and the gear roller 92 to take pictures and diagnose the outside of the blade 3.

[0022] 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 reciprocate, 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 tube 7 drives the hammer head 8 to reciprocate, and the hammer head 8 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. Further, the rotation of the mounting tube 7 drives the shooting seat 93 to rotate through the gear sleeve 91 and the gear roller 92, and then drives the high-definition camera 94 to move. The high-definition camera 94 captures the images of the inner and outer 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 the existing technology, which will not be described in detail here. Due to the difference in wind force, the rotation speed of the blade 3 is also different, and thus 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 activity ranges, and then when the hammer head 8 contacts the blade 3, the smaller the vibration it generates, which compensates for the vibration generated by its rotation speed, ensuring a stable amplitude in a good state, which is convenient for data comparison and diagnosis.

[0023] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] 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 protection scope of the present invention.

Claims

1. A fault diagnosis device for a wind turbine generator, comprising a base (1), the outer end of the base (1) being connected to a movable base (2) via a generator shaft, and a blade (3) being fixed to the outer side of the movable base (2), a first mounting ring (4) and a second mounting ring (5) being sleeved on the movable base (2), and the first mounting ring (4) and the second mounting ring (5) being arranged on the inner and outer sides of the blade (3) respectively; Features: It also comprises a movable rod (6), the movable rod (6) being 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) via an elastic telescopic rod (61), the first mounting ring (4) and the second mounting ring (5) are both provided with mounting tubes (7) which are rotatably embedded via torsion springs, and the mounting tubes (7) are sleeved with hammer heads (8), and a shooting assembly is provided on one side of the hammer head (8), and the shooting assembly is used to shoot the blades (3) at multiple angles; 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 through the movement of the movable rod (6); A pushing component is arranged between the base (1) and the inner end of the movable rod (6), and is used to push the movable rod (6) to move.

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 first mounting ring (4) and the second mounting ring (5) have built-in vibration sensors and signal transmission modules, which are used to sense the vibration generated by the hammer head (8) striking the blade (3) and transmit the vibration to a ground processor.

4. 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).

5. A fault diagnosis device for a wind turbine according to claim 4, 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.

6. A fault diagnosis device for a wind turbine according to claim 5, characterized in that: The rotating assembly comprises a movable column (101), and the movable column (101) is embedded and limitedly slidably installed in a first mounting ring (4) and a second mounting ring (5), a first push head (102) is arranged 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 on the outer side of the inner end of the movable column (101), and the guide head (103) is located in a guide groove (104), and the guide groove (104) is provided on the inner wall of the mounting cylinder (7).

7. A fault diagnosis device for a wind turbine generator according to claim 6, characterized in that: 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. The spiral directions of the guide grooves (104) in the first mounting ring (4) and the second mounting ring (5) are opposite.

8. A fault diagnosis device for a wind turbine generator according to claim 7, characterized in that: The pushing assembly comprises 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 pushing ring (113) via an electric push rod (112), and the outer side of the pushing ring (113) is fixed with a second pushing head (114).

9. A fault diagnosis device for a wind turbine generator according to claim 8, characterized in that: The third mounting ring (111) is provided with a wind speed sensor and a single chip microcomputer. 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).

10. A 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).

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