Abrasion evaluation equipment for gear of wind driven generator

Abstract

The utility model discloses wind driven generator gear wear evaluation equipment, which comprises a test fixing frame, a driving motor and a magnetic powder brake are respectively and fixedly mounted on one side of the outer surface of the test fixing frame, and a driving gear is fixedly connected to the position, located on one side of the outer surface of the test fixing frame, of an output shaft of the driving motor. A driven gear is fixedly connected to the position, located on one side of the outer surface of the testing fixing frame, of an output shaft of the magnetic powder brake, the driving gear and the driven gear are in meshed connection, and a driving gear encoder support and a driven gear encoder support are fixedly connected to the same side of the outer surface of the testing fixing frame and the driving gear. Hall encoders are fixedly connected to the driving gear encoder support and the driven gear encoder support. The gear set reliability evaluation and service life prediction system has the advantages of being complete in data recording, visual in recording and the like, and can be widely applied to reliability evaluation and service life prediction of various gear sets.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine gears, in particular to a device for evaluating the wear of wind turbine gears. Background Technique

[0002] A wind turbine is a power device that converts wind energy into mechanical work, then drives a rotor to rotate through the mechanical work, and finally outputs alternating current. The working principle of a wind turbine is relatively simple. The wind wheel rotates under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the wind wheel shaft, and then driving the generator to rotate and generate electricity. The wind turbine gear is the core component of the wind turbine, and its reliability and service life are the top priorities of industry personnel; usually, the life test uses damage and failure as marks to statistically calculate its reliability and service life, and it is impossible to restore the entire process of wear or damage, such as the formation time point and formation speed of wear defect positions. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a device for evaluating the wear of wind turbine gears.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A device for evaluating the wear of wind turbine gears, including a test fixing frame. On one side of the outer surface of the test fixing frame, a driving motor and a magnetic powder brake are respectively fixedly installed. The output shaft of the driving motor and at a position on one side of the outer surface of the test fixing frame is fixedly connected with a driving gear. The output shaft of the magnetic powder brake and at a position on one side of the outer surface of the test fixing frame is fixedly connected with a driven gear. The driving gear and the driven gear are meshed with each other. On the same side of the outer surface of the test fixing frame as the driving gear, a driving gear encoder bracket and a driven gear encoder bracket are respectively fixedly connected. Hall encoders are fixedly connected to both the driving gear encoder bracket and the driven gear encoder bracket. Radial magnets are arranged on both the output shaft of the driving motor and the output shaft of the magnetic powder brake. A camera array is fixedly connected to the test fixing frame.

[0005] As a further description of the above technical scheme:

[0006] The driving motor and the magnetic powder brake are both fixedly installed on the test fixing frame by screws.

[0007] As a further description of the above technical scheme:

[0008] Between the driving gear and the output shaft of the driving motor and between the driven gear and the output shaft of the magnetic powder brake, a key interference fitting method is adopted for fixed installation.

[0009] As a further description of the above technical scheme:

[0010] The driving gear encoder bracket and the driven gear encoder bracket are both fixedly installed on one side of the outer surface of the test fixture by screws, and the positions of the driving gear encoder bracket and the driven gear encoder bracket correspond to the central positions of the driving gear and the driven gear.

[0011] As a further description of the above technical solution:

[0012] Both of the two Hall encoders are fixedly installed at the central positions on the inner surfaces of the driving gear encoder bracket and the driven gear encoder bracket respectively by screws.

[0013] As a further description of the above technical solution:

[0014] Both of the two radial magnets are fixedly installed on the output shafts of the drive motor and the magnetic powder brake respectively by means of glue bonding.

[0015] As a further description of the above technical solution:

[0016] The geometric centers of the two Hall encoders, the two radial magnets, the output shaft of the drive motor and the output shaft of the magnetic powder brake are correspondingly located on the same axis line.

[0017] As a further description of the above technical solution:

[0018] There are two groups of the camera arrays correspondingly arranged and located at the upper and lower sides of the test fixture, and the camera modules in the two groups of camera arrays are respectively directed at the driving gear and the driven gear.

[0019] The utility model has the following beneficial effects:

[0020] The utility model has the characteristics of complete data recording, recording visualization, etc., and can be widely used for the reliability evaluation and life prediction of various gear sets. By using the Hall encoder to measure the rotational speed and the current rotation angle of the driving gear and the driven gear in real time, the difference between the ratio of the real-time rotational speeds and the designed transmission ratio can be compared to obtain the rotational speed fluctuation curve of the gear set. Through this curve, the working condition of the gear can be clearly reflected and the service life can be predicted. The camera arrays cooperate with the Hall encoder to photograph the tooth surface wear of each tooth in each revolution and generate a wear video, which is convenient for the testers to observe the formation process of its defects and jointly analyze and evaluate the current condition of the gear set with the rotational speed fluctuation curve mentioned above. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of a wind turbine gear wear evaluation device proposed by the utility model;

[0022] Figure 2The overall structural schematic diagram of a gear wear assessment device for a wind turbine proposed by the present utility model;

[0023] Figure 3 The exploded view of a gear wear assessment device for a wind turbine proposed by the present utility model;

[0024] Figure 4 The structural schematic diagram of a camera array of a gear wear assessment device for a wind turbine proposed by the present utility model.

[0025] Legend description:

[0026] 1. Test fixing frame; 2. Camera array; 3. Driving motor; 4. Magnetic powder brake; 5. Hall encoder; 6. Radial magnet; 7. Active gear encoder bracket; 8. Driven gear encoder bracket; 9. Active gear; 10. Driven gear. Specific implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" 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, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Refer to Figures 1-4, an embodiment provided by the present utility model: a wind turbine gear wear assessment device, including a test fixing frame 1. On one side of the outer surface of the test fixing frame 1, a driving motor 3 and a magnetic powder brake 4 are respectively fixedly installed by means of screw fixation. The output shaft of the driving motor 3, at a position on one side of the outer surface of the test fixing frame 1, is fixedly connected by means of key interference fit with a driving gear 9. The output shaft of the magnetic powder brake 4, at a position on one side of the outer surface of the test fixing frame 1, is fixedly connected by means of key interference fit with a driven gear 10. The driving gear 9 and the driven gear 10 are meshed with each other. On the same side of the outer surface of the test fixing frame 1 as the driving gear 9, a driving gear encoder bracket 7 and a driven gear encoder bracket 8 are respectively fixedly connected by means of screw fixation. The positions of the driving gear encoder bracket 7 and the driven gear encoder bracket 8 correspond to the central positions of the driving gear 9 and the driven gear 10. At the central positions of the inner surfaces of the driving gear encoder bracket 7 and the driven gear encoder bracket 8, Hall encoders 5 are respectively fixedly connected by means of screw fixation. On the output shafts of the driving motor 3 and the magnetic powder brake 4, radial magnets 6 are respectively fixedly installed by means of glue bonding. The geometric centers of the two Hall encoders 5, the two radial magnets 6, the output shaft of the driving motor 3, and the output shaft of the magnetic powder brake 4 are correspondingly located on the same axis. On the test fixing frame 1, a camera array 2 is fixedly connected by means of screw installation. There are two groups of camera arrays 2, which are located at the upper and lower sides of the test fixing frame 1. The camera modules in the two groups of camera arrays 2 have their lenses respectively facing the driving gear 9 and the driven gear 10. Multiple industrial camera modules are provided in each group of camera arrays 2.

[0030] Working principle: The driving motor 3 and the magnetic powder brake 4 are used to simulate the torque input during the operation of the gear set and the resistance torque of the driven gear 10 respectively. The Hall encoder 5 can measure the current rotation angle and speed of the two shafts by measuring the magnetic field intensity of the radial magnets 6 pasted on the shaft ends of the output shafts of the driving motor 3 and the magnetic powder brake 4. Since the transmission ratio of the gear set is known, the real-time transmission ratio fluctuation of the gear set can be obtained through the real-time speed data of the two shafts. As the gear set will wear during continuous use, and with the aggravation of wear, the fluctuation of the transmission ratio will gradually increase. Then the real-time transmission ratio data can be used as an observation index for gear detection. The camera arrays 2 located on both sides of the gear respectively take images of the two tooth surfaces of one tooth at the same time. Since the Hall encoder 5 can output the rotation angle of the current gear, the taken images can be corresponded to the teeth of the gear. Each time the gear rotates one circle, the two tooth surfaces of each tooth will be photographed. Repeating this process, the wear conditions of the two tooth surfaces of each tooth can be synthesized into a video, so that it is convenient and clear to observe at which rotation of the gear each defect starts to form and record the formation process of the defect, which is convenient for finding the reasons later. Furthermore, through image recognition of the taken images, the tester can be notified of the start of defect formation in a timely manner.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wind turbine gear wear assessment device, comprising a test fixing frame (1), characterized in that: On one side of the outer surface of the described test fixture (1), a drive motor (3) and a magnetic powder brake (4) are respectively fixedly installed. On the output shaft of the drive motor (3) and at a position on one side of the outer surface of the test fixture (1), a driving gear (9) is fixedly connected. On the output shaft of the magnetic powder brake (4) and at a position on one side of the outer surface of the test fixture (1), a driven gear (10) is fixedly connected. The driving gear (9) and the driven gear (10) are meshed with each other. On the same side of the outer surface of the test fixture (1) as the driving gear (9), a driving gear encoder bracket (7) and a driven gear encoder bracket (8) are respectively fixedly connected. Hall encoders (5) are fixedly connected to both the driving gear encoder bracket (7) and the driven gear encoder bracket (8). Radial magnets (6) are provided on the output shafts of both the drive motor (3) and the magnetic powder brake (4). A camera array (2) is fixedly connected to the test fixture (1).

2. The wind turbine gear wear assessment device according to claim 1, characterized in that: The drive motor (3) and the magnetic powder brake (4) are both fixedly installed on the test fixture (1) by screws.

3. The wind turbine gear wear assessment device according to claim 1, characterized in that: Between the driving gear (9) and the output shaft of the drive motor (3) and between the driven gear (10) and the output shaft of the magnetic powder brake (4), a key interference fit assembly method is used for fixed installation.

4. An evaluation device for wind turbine gear wear according to claim 1, characterized in that: The driving gear encoder bracket (7) and the driven gear encoder bracket (8) are both fixedly installed on one side of the outer surface of the test fixture (1) by screws, and the positions of the driving gear encoder bracket (7) and the driven gear encoder bracket (8) correspond to the central positions of the driving gear (9) and the driven gear (10).

5. An evaluation device for wind turbine gear wear according to claim 1, characterized in that: Both of the two Hall encoders (5) are fixedly installed at the central positions on the inner surfaces of the driving gear encoder bracket (7) and the driven gear encoder bracket (8) by screws respectively.

6. The wind turbine gear wear assessment device according to claim 1, characterized in that: Both of the two radial magnets (6) are fixedly installed on the output shafts of the drive motor (3) and the magnetic powder brake (4) by means of glue bonding respectively.

7. An evaluation device for wind turbine gear wear according to claim 1, characterized in that: The geometric centers of the two Hall encoders (5), the two radial magnets (6), the output shaft of the drive motor (3), and the output shaft of the magnetic powder brake (4) are correspondingly located on the same axis line.

8. The wind turbine gear wear assessment device according to claim 1, characterized in that: There are two corresponding sets of the camera array (2) and they are located at the upper and lower sides of the test fixture (1). The camera modules in the two sets of the camera array (2) have their lenses facing the driving gear (9) and the driven gear (10) respectively.

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