Dynamic balance test device for fan rotor

Abstract

A dynamic balance test device for a fan rotor belongs to the technical field of fan rotor test equipment and comprises a test bench, an adapter block is fixedly mounted on a bench surface of the test bench, a hydraulic telescopic column is rotatably mounted in the adapter block, and an arc-shaped frame with openings at the bottoms of two ends is rotatably mounted on the bench surface of the test bench. The end, away from the adapter block, of the hydraulic telescopic column is rotationally connected with the rear side of the arc-shaped frame, a driving belt is rotationally installed in the arc-shaped frame, a driving mechanism used for driving the driving belt to rotate is installed in the arc-shaped frame, two sliding grooves are symmetrically formed in the upper surface of the test bed, and two L-shaped carrying blocks are slidably installed in the sliding grooves. According to the fan rotor driving device, the driving belt and the fan rotor can be pressed in a contact mode through the hydraulic telescopic columns, and then the driving operation on the fan rotor can be completed through the driving mechanism and the driving belt. According to the device, the operation convenience is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of wind turbine rotor test equipment, specifically relating to a wind turbine rotor dynamic balancing test device. Background Technology

[0002] During the manufacturing and maintenance of wind turbines, the dynamic balance of the turbine rotor has a crucial impact on the performance and stability of the turbine. To ensure that the turbine rotor maintains good dynamic balance during operation, dynamic balancing testing is an essential step.

[0003] Currently, the widely used dynamic balancing testing equipment for wind turbine rotors faces numerous problems in practical operation that urgently need to be addressed. Existing test benches typically employ an interference fit between the wind turbine rotor shaft and the drive motor when rotating the rotor. While this interference fit ensures effective power transmission to some extent, it introduces significant inconvenience in actual use. Each test requires substantial time and effort to achieve the interference fit between the wind turbine rotor and the drive motor shaft, and disassembly after the test is equally cumbersome. Furthermore, the wind turbine rotor is usually mounted on the test bench using a bearing base. This mounting method makes disassembly and assembly of the wind turbine rotor on the test bench extremely inconvenient, increasing the workload of operators and potentially damaging the wind turbine rotor and related components of the test bench during frequent disassembly and assembly, thus affecting the accuracy of the test and the lifespan of the equipment.

[0004] To address this issue, another wind turbine rotor dynamic balancing test device is provided. Utility Model Content

[0005] To address the problems of inconvenient assembly of the wind turbine rotor and drive motor, and cumbersome and laborious operation during rotational installation with the test bench in existing wind turbine rotor dynamic balancing test devices, this invention provides a wind turbine rotor dynamic balancing test device. This device uses a hydraulic telescopic column to drive an arc-shaped frame to rotate towards the wind turbine rotor, ensuring a tight fit between the drive belt and the outer surface of the rotor. The drive mechanism then rotates the drive belt, thus driving the rotor's rotation. This design eliminates the traditional interference fit between the wind turbine rotor shaft and the output motor. It only requires the hydraulic telescopic column to press the drive belt against the rotor, and the drive mechanism completes the driving operation. This device significantly improves operational convenience, effectively solves the technical problem of cumbersome and inconvenient assembly of the wind turbine rotor and drive motor in existing wind turbine rotor dynamic balancing test devices, and greatly improves testing efficiency and equipment practicality. The specific technical solution is as follows:

[0006] A dynamic balancing test device for a wind turbine rotor includes a test bench. A transition block is fixedly installed on the test bench surface. A hydraulic telescopic column is rotatably installed within the transition block. An arc-shaped frame with openings at both ends is rotatably installed on the test bench surface. One end of the hydraulic telescopic column, away from the transition block, is rotatably connected to the rear side of the arc-shaped frame. A drive belt is rotatably installed within the arc-shaped frame. A drive mechanism for rotating the drive belt is installed within the arc-shaped frame. Two symmetrical sliding grooves are formed on the upper surface of the test bench. Two L-shaped blocks are slidably installed within each sliding groove. Lifting wheels are rotatably installed within each L-shaped block. A synchronous spacing adjustment mechanism is installed between the two sliding grooves to synchronously adjust the spacing between the two L-shaped blocks.

[0007] In the above technical solution, the driving mechanism includes four directional guide wheels, two pressure wheels, a drive wheel, and a drive motor. The directional guide wheels, pressure wheels, and drive wheels are all rotatably mounted inside the arc-shaped frame. The drive belt is tautly sleeved between the directional guide wheels and the drive wheel. The pressure wheels are located on the front and rear sides of the drive wheel and are used to press the drive belt tightly against the outer surface of the drive wheel. The drive motor is fixedly mounted on the right surface of the arc-shaped frame, and the output end of the drive motor is fixedly connected to the shaft end of the drive wheel.

[0008] In the above technical solution, slide rails are provided through the outer surfaces of both ends of the arc-shaped frame. A fixed plate is fixedly installed in the slide rail, and a wheel frame is slidably installed in the slide rail. An arc-shaped spring is fixedly installed between the wheel frame and the fixed plate. A movable wheel is rotatably installed in the wheel frame, and the inner surface of the drive belt is in contact with the outer surface of the movable wheel.

[0009] In the above technical solution, an arc-shaped telescopic rod is fixedly installed between the wheel frame and the fixed plate, and the arc-shaped telescopic rod is located inside the arc-shaped spring;

[0010] In the above technical solution, the synchronous spacing adjustment mechanism includes two bidirectional screws with positive and negative threads. The bidirectional screws with positive and negative threads are rotatably installed in corresponding slide grooves. Two corresponding L-shaped carrier blocks are symmetrically screwed onto the outer surface of the bidirectional screws with positive and negative threads. A sprocket is sleeved on the front end of each bidirectional screw with positive and negative threads, and a transmission chain is connected between the two sprockets.

[0011] In the above technical solution, a handwheel is fixedly installed at the front end of any one of the bidirectional screws with positive and negative threads.

[0012] The wind turbine rotor dynamic balancing test device of this utility model has the following advantages compared with the prior art:

[0013] I. This utility model abandons the traditional interference fit method between the fan rotor shaft end and the output motor. It only requires a hydraulic telescopic column to press the drive belt against the fan rotor, and the drive mechanism and drive belt are used to complete the drive operation of the fan rotor. This device significantly improves the ease of operation, effectively solves the technical problem of the cumbersome and inconvenient assembly process of the fan rotor and drive motor in existing fan rotor dynamic balancing test devices, and greatly improves test efficiency and equipment practicality.

[0014] II. This utility model, by adding an arc-shaped spring, an arc-shaped telescopic rod, and a wheel frame with a slidingly mounted movable wheel inside the arc-shaped frame, allows the arc-shaped spring to adaptively change the position of the movable wheel according to the actual shape and surface condition of the fan rotor when the drive belt presses against the outer surface of the fan rotor. This feature not only increases the contact area between the drive belt and the outer surface of the fan rotor, but also makes the driving force of the drive belt on the fan rotor more uniform and stable during rotation, effectively avoiding fan rotor wear or dynamic balance test errors caused by uneven local force. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the arc-shaped frame of this utility model.

[0017] Figure 3 This is a schematic diagram of the movable wheel structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the L-shaped carrier block structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of this utility model in use.

[0020] Figure 6 This is a top view of the structure when the present invention is in use.

[0021] Figures 1-6 The components include: 1. Test bench; 11. Transfer block; 12. Hydraulic telescopic column; 13. Slide groove; 2. Arc frame; 21. Slide rail; 211. Fixing plate; 22. Directional guide wheel; 23. Drive wheel; 24. Pressure wheel; 25. Wheel frame; 26. Movable wheel; 27. Arc spring; 28. Arc telescopic rod; 3. Drive belt; 4. Drive motor; 5. L-shaped carrier block; 51. Lifting wheel; 6. Synchronous spacing adjustment mechanism; 61. Double-sided screw with positive and negative threads; 611. Handwheel; 62. Sprocket; 63. Transmission chain. 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] In this embodiment, front, back, left, right, top, and bottom are... Figure 1 Describe the reference plane. See [link / reference] Figures 1-6 This utility model provides a technical solution:

[0024] A dynamic balancing test device for a wind turbine rotor includes a test bench 1. A transition block 11 is fixedly installed on the surface of the test bench 1. A hydraulic telescopic column 12 is rotatably installed inside the transition block 11. An arc-shaped frame 2 with openings at both ends is rotatably installed on the surface of the test bench 1. The end of the hydraulic telescopic column 12 away from the transition block 11 is rotatably connected to the rear side of the arc-shaped frame 2. A drive belt 3 is rotatably installed inside the arc-shaped frame 2. A drive mechanism for driving the drive belt 3 to rotate is installed inside the arc-shaped frame 2. Two sliding grooves 13 are symmetrically opened on the upper surface of the test bench 1. Two L-shaped carrier blocks 5 are slidably installed in each sliding groove 13. Lifting wheels 51 are rotatably installed in each L-shaped carrier block 5. A synchronous spacing adjustment mechanism 6 is installed between the two sliding grooves 13. The synchronous spacing adjustment mechanism 6 is used to synchronously adjust the spacing between the two L-shaped carrier blocks 5.

[0025] It should be noted that the drive mechanism includes four directional guide wheels 22, two pressure wheels 24, a drive wheel 23, and a drive motor 4. The directional guide wheels 22, pressure wheels 24, and drive wheels 23 are all rotatably mounted inside the arc frame 2. The drive belt 3 is tautly sleeved between the directional guide wheels 22 and the drive wheel 23. The pressure wheels 24 are located on the front and rear sides of the drive wheel 23 and are used to press the drive belt 3 tightly against the outer surface of the drive wheel 23. The drive motor 4 is fixedly mounted on the right surface of the arc frame 2, and the output end of the drive motor 4 is fixedly connected to the shaft end of the drive wheel 23.

[0026] When using, combine Figure 1As shown, the fan rotor is mounted on the lifting wheels 51 on both sides. Then, the hydraulic telescopic column 12 extends, driving the arc frame 2 to move in opposite directions relative to the fan rotor, so that the drive belt 3 is pressed against the outer surface of the fan rotor. Then, the drive motor 4 is started, and the drive motor 4 drives the drive wheel 23 to rotate. Under the action of the clamping wheel 24, the drive belt 3 is driven by the drive wheel 23, thus causing the fan rotor to rotate due to friction, and a dynamic balance test is performed. During the test, the sensors of the external measuring instruments used for dynamic balance measurement need to be fixed on the L-shaped carrier blocks 5 on both sides. The balance data during the rotation of the fan rotor is measured and calculated by the fluctuation of the L-shaped carrier blocks 5. Compared with the existing technology, the overall design eliminates the need for interference connection between the fan rotor and the drive components, making operation more convenient and labor-saving, and the experiment more efficient.

[0027] To increase the contact area between the drive belt 3 and the outer surface of the fan rotor, combined with Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, slide rails 21 are provided through the outer surfaces of both ends of the arc frame 2. A fixed plate 211 is fixedly installed in the slide rail 21, and a wheel frame 25 is slidably installed in the slide rail 21. An arc spring 27 is fixedly installed between the wheel frame 25 and the fixed plate 211. A movable wheel 26 is rotatably installed in the wheel frame 25. The inner surface of the drive belt 3 is in contact with the outer surface of the movable wheel 26. An arc telescopic rod 28 is fixedly installed between the wheel frame 25 and the fixed plate 211. The arc telescopic rod 28 is located inside the arc spring 27.

[0028] When the arc frame 2 flips towards the fan rotor, the drive belt 3 gradually comes into contact with the outer surface of the fan rotor. During the contact process, the drive belt 3 is pulled inward by force, which drives the wheel frame 25 to move upward in the slide 21. The arc spring 27 contracts, thereby increasing the contact area between the drive belt 3 and the outer surface of the fan rotor. This makes the driving force of the drive belt 3 on the fan rotor more uniform and stable during rotation, effectively avoiding fan rotor wear or dynamic balance test errors caused by uneven local force.

[0029] Finally, combining Figure 1 and Figure 4 As shown, the synchronous spacing adjustment mechanism 6 includes two bidirectional screws 61 with positive and negative threads. The bidirectional screws 61 with positive and negative threads are rotatably mounted on the corresponding slide grooves 13. Two corresponding L-shaped carrier blocks 5 are symmetrically screwed onto the outer surface of the bidirectional screws 61 with positive and negative threads. The front end of each bidirectional screw 61 with positive and negative threads is fitted with a sprocket 62. A transmission chain 63 is connected between the two sprockets 62. A handwheel 611 is fixedly installed at the front end of any one of the bidirectional screws 61 with positive and negative threads.

[0030] When conducting experiments on fan rotors with different shaft diameters, the distance between the two L-shaped carrier blocks 5 can be adjusted appropriately according to the length of the shaft diameter, thereby adaptively adjusting the distance between the two lifting wheels 51. During adjustment, rotating the handwheel 611 can drive the two bidirectional screws 61 to rotate forward or backward through the linkage between the sprocket 62 and the transmission chain 63. When the bidirectional screws 61 rotate, they can synchronously drive the L-shaped carrier blocks 5 at the corresponding positions to move inward or outward. When moving inward, the distance between the two lifting wheels 51 is reduced, which is suitable for fan rotors with smaller shaft diameters. When moving outward, the distance between the two lifting wheels 51 is increased, which is suitable for fan rotors with larger shaft diameters, thereby improving the overall applicability of the device.

Claims

1. A dynamic balancing test device for a wind turbine rotor, comprising a test bench (1), characterized in that, A transition block (11) is fixedly installed on the test bench (1). A hydraulic telescopic column (12) is rotatably installed inside the transition block (11). An arc-shaped frame (2) with openings at both ends is rotatably installed on the test bench (1). The end of the hydraulic telescopic column (12) away from the transition block (11) is rotatably connected to the rear side of the arc-shaped frame (2). A drive belt (3) is rotatably installed inside the arc-shaped frame (2). A drive mechanism for driving the drive belt (3) to rotate is installed inside the arc-shaped frame (2). The test bench (1) has two symmetrical sliding grooves (13) on its upper surface. Two L-shaped carrier blocks (5) are slidably installed in each sliding groove (13). Lifting wheels (51) are rotatably installed in each L-shaped carrier block (5). A synchronous spacing adjustment mechanism (6) is installed between the two sliding grooves (13). The synchronous spacing adjustment mechanism (6) is used to synchronously adjust the spacing between the two L-shaped carrier blocks (5) in the front and rear.

2. The wind turbine rotor dynamic balancing test device according to claim 1, characterized in that, The drive mechanism includes four directional guide wheels (22), two pressure wheels (24), a drive wheel (23), and a drive motor (4). The directional guide wheels (22), pressure wheels (24), and drive wheels (23) are all rotatably mounted inside the arc frame (2). The drive belt (3) is tautly sleeved between the directional guide wheels (22) and the drive wheel (23). The pressure wheels (24) are located on the front and rear sides of the drive wheel (23) and are used to press the drive belt (3) tightly against the outer surface of the drive wheel (23). The drive motor (4) is fixedly mounted on the right surface of the arc frame (2), and the output end of the drive motor (4) is fixedly connected to the shaft end of the drive wheel (23).

3. The wind turbine rotor dynamic balancing test device according to claim 2, characterized in that, The outer surfaces of both ends of the arc frame (2) are provided with slide rails (21). A fixed plate (211) is fixedly installed in the slide rail (21), and a wheel frame (25) is slidably installed in the slide rail (21). An arc spring (27) is fixedly installed between the wheel frame (25) and the fixed plate (211). A movable wheel (26) is rotatably installed in the wheel frame (25). The inner surface of the drive belt (3) is in contact with the outer surface of the movable wheel (26).

4. The wind turbine rotor dynamic balancing test device according to claim 3, characterized in that, An arc-shaped telescopic rod (28) is fixedly installed between the wheel frame (25) and the fixing plate (211), and the arc-shaped telescopic rod (28) is located inside the arc-shaped spring (27).

5. The wind turbine rotor dynamic balancing test device according to claim 1, characterized in that, The synchronous spacing adjustment mechanism (6) includes two bidirectional screws (61) with positive and negative threads. The bidirectional screws (61) with positive and negative threads are rotatably mounted on the corresponding slide grooves (13). Two corresponding L-shaped carrier blocks (5) are symmetrically screwed onto the outer surface of the bidirectional screws (61) with positive and negative threads. The front end of each bidirectional screw (61) with positive and negative threads is fitted with a sprocket (62). A transmission chain (63) is connected between the two sprockets (62).

6. The wind turbine rotor dynamic balancing test device according to claim 5, characterized in that, A handwheel (611) is fixedly installed at the front end of any one of the two-way screws (61) with positive and negative threads.

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