In-service detection device for main shaft of wind generating set

Abstract

The utility model discloses an in-service detection device for a main shaft of a wind generating set, and particularly relates to the technical field of detection of the main shaft of the wind generating set, which comprises a probe mounting seat mounted on one side close to the end surface of the main shaft of the wind generating set, and an ultrasonic detection probe is mounted on one side close to the main shaft of the wind generating set on the inner side of the probe mounting seat; a locking mechanism for fixing the mounting position of the ultrasonic detection probe is arranged on the outer wall of the probe mounting seat, and a connecting rod is fixedly connected to one side, far away from the main shaft of the wind generating set, of the outer wall of the probe mounting seat. According to the ultrasonic detection probe mounting seat, the stability of the ultrasonic detection probe after being mounted on the probe mounting seat is improved, the falling phenomenon is prevented, the plurality of splicing rods are arranged, so that the ultrasonic detection probe is convenient to assemble and disassemble, the falling problem is not easy to occur, and the splicing rods with different numbers are additionally arranged; while the end face of the wind generating set main shaft is detected, the outer surfaces of other parts of the wind generating set main shaft can be subjected to ultrasonic detection.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine generator main shaft testing technology, and more specifically, to an in-service testing device for wind turbine generator main shaft. Background Technology

[0002] With continuous technological advancements and increasing environmental awareness, wind power has become an important component of the global energy structure. As the core equipment for wind energy conversion, the stability and reliability of wind turbine generators directly affect the efficiency and effectiveness of wind power generation. The main shaft of a wind turbine generator, as a key component, bears the important tasks of transmitting torque and bearing load. The safety and rationality of the main shaft design directly affect the performance of the entire unit. Therefore, the quality and reliability of the main shaft are of paramount importance. However, in actual operation, due to various factors such as long-term high-load operation and harsh environments, the main shaft may develop defects such as cracks and wear. If these defects are not detected and addressed in a timely manner, they will pose a serious threat to the operational safety of the unit.

[0003] To ensure the safe operation of wind turbine generators, wind power companies are paying increasing attention to the research on in-service inspection methods for wind turbine main shafts. Traditional inspection methods mainly rely on manual inspection and simple non-destructive testing techniques, but these methods have problems such as low inspection efficiency and poor accuracy, and cannot meet the high quality requirements of modern wind turbine generators for main shafts.

[0004] To this end, a search revealed that Chinese Patent CN211927791U discloses a phased array ultrasonic-assisted testing device for the main shaft end face of an in-service wind turbine, belonging to the field of inspection and testing technology for important metal components of wind turbine generators. The device utilizes a fixed inner ring to fix the testing probe, and a middle connecting rod to fix the probe axially on the main shaft end face of the wind turbine, ensuring accurate and rapid scanning of stress concentration areas, precisely distinguishing between structural waves and defect waves, and preventing missed defects.

[0005] The aforementioned testing device employs ultrasonic testing, primarily utilizing an ultrasonic probe. However, in actual use, the ultrasonic probe is directly secured to the probe mounting base by spring compression. This method of using spring compression alone cannot guarantee the stability of the probe after installation, making it prone to detachment. Furthermore, although the intermediate connecting rod is telescopic, its crossbar length is limited, making it difficult to meet the length adjustment requirements when performing ultrasonic testing on the outer surface of the wind turbine generator's main shaft. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides an in-service testing device for the main shaft of a wind turbine generator set.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an in-service testing device for the main shaft of a wind turbine generator set, comprising a probe mounting base installed on one side near the end face of the main shaft of the wind turbine generator set, an ultrasonic testing probe being installed on the inner side of the probe mounting base near the main shaft of the wind turbine generator set, a locking mechanism for fixing the installation position of the ultrasonic testing probe being provided on the outer wall of the probe mounting base, and a connecting rod being fixedly connected to the outer wall of the probe mounting base away from the main shaft of the wind turbine generator set, a plurality of splicing rods being connected to the end of the connecting rod, a vertical cylinder being connected to the end of the outermost splicing rod, an adjusting rod being connected to the inner side of the vertical cylinder, a fixing ring being fixedly connected to the end of the adjusting rod and sleeved on the flange of the hollow tube shaft, scale lines being provided on the outer surface of the adjusting rod, and a locking bolt for fixing the position of the adjusting rod being connected to the outer wall of the end of the vertical cylinder.

[0008] As a further improvement to the technical solution of this utility model, the locking mechanism includes a first groove on the outer wall of the probe mounting base and a second groove on the outer wall of the ultrasonic detection probe near the first groove. The inner wall of the second groove is provided with a toothed groove. A pull plate is provided inside the first groove. A pull ring is provided on the outer wall of the pull plate. A spring is connected between the inner side wall of the pull plate and the inner wall of the first groove. A pull rod is fixedly connected to the middle inner side wall of the pull plate. One end of the pull rod extends to the inner side of the second groove and is fixedly connected to a movable plate. The end of the movable plate is provided with a locking block that matches the toothed groove structure.

[0009] As a further improvement to the technical solution of this utility model, the probe mounting base is provided with a slot for embedding an ultrasonic testing probe inside, the inner sidewall of the probe mounting base is provided with a movable cavity outside the movable plate, and the probe mounting base is provided with a through hole for the pull rod to pass through, the through hole communicating with the first groove and the interior of the movable cavity.

[0010] As a further improvement to the technical solution of this utility model, the connection between the two ends of the spring and the inner wall of the pulling plate and the inner wall of the first groove is welding.

[0011] As a further improvement to the technical solution of this utility model, a positioning insert is provided at the same end of the vertical cylinder and each splicing rod, and a positioning slot for inserting the positioning insert is provided at the same end of the connecting rod and each splicing rod. A first magnet block is fixedly installed on the inner side of the same end of the vertical cylinder and each splicing rod near the positioning insert, and an embedding groove for embedding the first magnet block is provided at the same end of the connecting rod and each splicing rod. A second magnet block is installed on the inner wall of each embedding groove.

[0012] As a further improvement to the technical solution of this utility model, the inner diameter of the vertical section of the positioning slot is greater than the outer diameter of the vertical section of the positioning rod, the depth of the positioning slot is greater than the length of the positioning rod, and the contact surface between the adjacent first magnet block and the embedded groove is a magnetic pole of opposite polarity.

[0013] As a further improvement to the technical solution of this utility model, the interior of the vertical cylinder is provided with a groove for the extension and retraction of the adjusting rod, and the outer wall of the vertical cylinder is provided with a screw hole at the connection point of the locking bolt. The included angle between the vertical cylinder and the splicing rod is a right angle structure.

[0014] The beneficial effects of this utility model are:

[0015] 1. A locking mechanism is provided on the outer wall of the probe mounting base to fix the installation position of the ultrasonic testing probe. During operation, pulling the pull ring outward will move the pull plate and pull rod outward, which in turn will move the movable plate and locking tooth block outward. The spring is in a stretched state. At this time, the ultrasonic testing probe can be installed or removed. During installation, the ultrasonic testing probe is inserted into the slot in the probe mounting base. After the second groove is close to the inside of the movable plate, the pull ring is released. The spring returns to its original position and moves the pull plate and pull rod inward. The locking tooth block on the movable plate is locked inside the tooth groove, which improves the stability of the ultrasonic testing probe after installation and prevents it from falling off.

[0016] 2. The various splicing rods, connecting rods, and vertical cylinders are designed to maintain directional consistency by matching positioning pins with positioning slots. The opposite magnetic poles on the adjacent surfaces of the first and second magnet blocks ensure a secure magnetic connection after splicing, preventing detachment. By adding different numbers of splicing rods, ultrasonic testing can be performed on the outer surfaces of other parts of the wind turbine main shaft, while simultaneously inspecting the end face of the wind turbine main shaft. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the connection between the splicing rod and the vertical cylinder in this utility model.

[0019] Figure 3 This utility model Figure 1 Enlarged view of section A.

[0020] Figure 4 This is a schematic diagram of the connection structure between the toothed block and the movable plate in this utility model.

[0021] The attached figures are labeled as follows: 1. Probe mounting base; 2. Ultrasonic testing probe; 3. Connecting rod; 4. Splicing rod; 5. Vertical cylinder; 6. Adjusting rod; 7. Fixing ring; 8. Scale line; 9. Locking bolt; 10. Positioning insert rod; 11. Positioning slot; 12. First magnet block; 13. Embedded groove; 14. Second magnet block; 15. Pull plate; 16. First groove; 17. Spring; 18. Pull rod; 19. Movable plate; 20. Movable cavity; 21. Clamping tooth block; 22. Second groove; 23. Tooth groove; 24. Perforation; 25. Pull ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] As attached Figure 1-4 The in-service testing device for the main shaft of the wind turbine generator shown includes a probe mounting base 1 installed on one side near the end face of the main shaft of the wind turbine generator. An ultrasonic testing probe 2 is installed on the inner side of the probe mounting base 1 near the main shaft of the wind turbine generator. A locking mechanism is provided on the outer wall of the probe mounting base 1 to fix the installation position of the ultrasonic testing probe 2. A connecting rod 3 is fixedly connected to the outer wall of the probe mounting base 1 away from the main shaft of the wind turbine generator. Several splicing rods 4 are connected to the end of the connecting rod 3. The end of the outermost splicing rod 4 is connected to a vertical cylinder 5. An adjusting rod 6 is connected to the inner side of the vertical cylinder 5. A fixing ring 7 is fixedly connected to the end of the adjusting rod 6 and sleeved on the hollow tube shaft flange. The outer surface of the adjusting rod 6 is provided with scale lines 8. A locking bolt 9 is connected to the outer wall of the end of the vertical cylinder 5 to fix the position of the adjusting rod 6.

[0024] As attached Figure 1 and attached Figure 3-4As shown, the locking mechanism includes a first groove 16 on the outer wall of the probe mounting base 1 and a second groove 22 on the outer wall of the ultrasonic testing probe 2 near the first groove 16. The inner wall of the second groove 22 has a toothed groove 23. A pull plate 15 is disposed inside the first groove 16, and a pull ring 25 is disposed on the outer wall of the pull plate 15. A spring 17 connects the inner wall of the pull plate 15 to the inner wall of the first groove 16. A pull rod 18 is fixedly connected to the inner wall of the middle portion of the pull plate 15. One end of the pull rod 18 extends to the inner side of the second groove 22 and is fixedly connected to a movable plate 19. The end of the movable plate 19 has a structure corresponding to the toothed groove 23. The matching locking block 21 and the probe mounting base 1 are provided with a slot for embedding the ultrasonic testing probe 2. The inner side wall of the probe mounting base 1 is provided with a movable cavity 20 outside the movable plate 19. The probe mounting base 1 is provided with a through hole 24 for the pull rod 18 to pass through. The through hole 24 communicates with the first groove 16 and the interior of the movable cavity 20. The connection between the two ends of the spring 17 and the inner side wall of the pull plate 15 and the inner wall of the first groove 16 is welded. This makes it easy to lock and fix the ultrasonic testing probe 2 after it is installed at the end of the probe mounting base 1, so that the ultrasonic testing probe 2 can remain stable after installation and is not easy to fall off.

[0025] As attached Figure 1-2 As shown, a positioning insert 10 is provided on the same side end of the vertical cylinder 5 and each splicing rod 4. A positioning slot 11 for inserting the positioning insert 10 is provided on the same side end of the connecting rod 3 and each splicing rod 4. A first magnet block 12 is fixedly installed on the same side end of the vertical cylinder 5 and each splicing rod 4 near the inner side of the positioning insert 10. An embedding groove 13 for embedding the first magnet block 12 is provided on the same side end of the connecting rod 3 and each splicing rod 4. A second magnet block 14 is installed on the inner wall of each embedding groove 13. The inner diameter of the vertical section of the positioning slot 11 is larger than the outer diameter of the vertical section of the positioning insert 10. The depth of the positioning slot 11 is larger than the length of the positioning insert 10. The contact surfaces of adjacent first magnet blocks 12 and embedding grooves 13 are opposite magnetic poles, which facilitates the assembly and disassembly of multiple splicing rods 4 and vertical cylinder 5.

[0026] The vertical cylinder 5 has a groove inside for the extension and retraction of the adjusting rod 6, and the outer wall of the vertical cylinder 5 has screw holes at the connection point of the locking bolt 9. The angle between the vertical cylinder 5 and the splicing rod 4 is a right angle structure, which makes it easy to control the extension length of the adjusting rod 6 inside the vertical cylinder 5, and thus makes it easy to adjust according to the radius length of the wind turbine generator main shaft.

[0027] Working principle: This utility model designs an in-service testing device for the main shaft of a wind turbine generator set. The specific structure is shown in the attached instruction manual. Figure 1-4As shown, during use, the fixing ring 7 is installed on the hollow tube shaft flange. Based on the position of the wind turbine main shaft being inspected, the locking bolt 9 is loosened, the extension length of the adjusting rod 6 inside the vertical cylinder 5 is controlled, and then the locking bolt 9 is tightened to complete the fixation. Then, different numbers of splicing rods 4 are added according to the detected position of the wind turbine main shaft, and the ultrasonic testing probe 2 installed on the probe mounting base 1 is used for detection. A locking mechanism for fixing the installation position of the ultrasonic testing probe 2 is provided on the outer wall of the probe mounting base 1. During operation, pulling the pull ring 25 outwards moves the pull plate 15 and pull rod 18 outwards, thereby moving the movable plate 19 and the locking tooth block 21 outwards. The spring 17 is in a stretched state. At this time, the ultrasonic testing probe 2 can be installed or removed. During installation, the ultrasonic testing probe 2 extends into the slot inside the probe mounting base 1. Inside, after the second groove 22 is brought closer to the inside of the movable plate 19, the pull ring 25 is released, the spring 17 returns to its original position, driving the pull plate 15 and the pull rod 18 to move inward, and the locking block 21 on the movable plate 19 is locked inside the tooth groove 23, which improves the stability of the ultrasonic testing probe 2 after installation and prevents it from falling off. In addition, the several splicing rods 4 are connected to the connecting rod 3 and the vertical cylinder 5 by using the positioning plug 10 and the positioning slot 11 to maintain the consistency of direction. The opposite magnetic poles of the adjacent surfaces of the first magnet block 12 and the second magnet block 14 are used to ensure that the magnetic connection is fixed after splicing and it is not easy to fall off. By adding different numbers of splicing rods 4, it is possible to perform ultrasonic testing on the outer surface of other parts of the wind turbine main shaft while satisfying the testing of the end face of the wind turbine main shaft.

[0028] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An in-service testing device for the main shaft of a wind turbine generator set, comprising a probe mounting base (1) installed on one side near the end face of the main shaft of the wind turbine generator set, wherein an ultrasonic testing probe (2) is installed on the inner side of the probe mounting base (1) near the main shaft of the wind turbine generator set, characterized in that: The outer wall of the probe mounting base (1) is provided with a locking mechanism to fix the installation position of the ultrasonic detection probe (2), and a connecting rod (3) is fixedly connected to the side of the outer wall of the probe mounting base (1) away from the main shaft of the wind turbine generator set. Several splicing rods (4) are connected to the end of the connecting rod (3), and a vertical cylinder (5) is connected to the end of the splicing rod (4). An adjusting rod (6) is connected to the inner side of the vertical cylinder (5). A fixing ring (7) sleeved on the hollow tube shaft flange is fixedly connected to the end of the adjusting rod (6). A scale line (8) is provided on the outer surface of the adjusting rod (6). A locking bolt (9) for fixing the position of the adjusting rod (6) is connected to the outer wall of the end of the vertical cylinder (5).

2. The in-service testing device for the main shaft of a wind turbine generator set according to claim 1, characterized in that: The locking mechanism includes a first groove (16) on the outer wall of the probe mounting base (1) and a second groove (22) on the outer wall of the ultrasonic detection probe (2) near the first groove (16). The inner wall of the second groove (22) is provided with a toothed groove (23). A pull plate (15) is provided inside the first groove (16). A pull ring (25) is provided on the outer wall of the pull plate (15). A spring (17) is connected between the inner wall of the pull plate (15) and the inner wall of the first groove (16). A pull rod (18) is fixedly connected to the inner wall of the middle part of the pull plate (15). One end of the pull rod (18) extends to the inner side of the second groove (22) and is fixedly connected to a movable plate (19). The end of the movable plate (19) is provided with a locking block (21) that matches the structure of the toothed groove (23).

3. The in-service testing device for the main shaft of a wind turbine generator set according to claim 2, characterized in that: The probe mounting base (1) has a slot for embedding the ultrasonic testing probe (2) inside. The inner sidewall of the probe mounting base (1) is provided with a movable cavity (20) outside the movable plate (19). The probe mounting base (1) has a through hole (24) for the pull rod (18) to pass through inside. The through hole (24) is connected to the first groove (16) and the interior of the movable cavity (20).

4. The in-service testing device for the main shaft of a wind turbine generator set according to claim 2, characterized in that: The connection between the two ends of the spring (17) and the inner wall of the pull plate (15) and the inner wall of the first groove (16) is welded.

5. The in-service testing device for the main shaft of a wind turbine generator set according to claim 1, characterized in that: The vertical cylinder (5) and each splicing rod (4) are provided with a positioning insert (10) on the same side end. The connecting rod (3) and each splicing rod (4) are provided with a positioning slot (11) for inserting the positioning insert (10). The vertical cylinder (5) and each splicing rod (4) are provided with a first magnet block (12) fixedly installed on the inner side of the positioning insert (10) near the same side end. The connecting rod (3) and each splicing rod (4) are provided with an embedding groove (13) for embedding the first magnet block (12). The inner wall of each embedding groove (13) is provided with a second magnet block (14).

6. The in-service testing device for the main shaft of a wind turbine generator set according to claim 5, characterized in that: The vertical cross-sectional inner diameter of the positioning slot (11) is greater than the vertical cross-sectional outer diameter of the positioning rod (10), the depth of the positioning slot (11) is greater than the length of the positioning rod (10), and the contact surfaces of the adjacent first magnet block (12) and the embedded groove (13) are opposite magnetic poles.

7. The in-service testing device for the main shaft of a wind turbine generator set according to claim 1, characterized in that: The vertical cylinder (5) has a groove inside for the extension and retraction of the adjusting rod (6), and the outer wall of the vertical cylinder (5) has a screw hole at the connection point of the locking bolt (9). The included angle between the vertical cylinder (5) and the splicing rod (4) is a right angle structure.

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