A reliability testing device and method based on a yaw gearbox of a wind turbine

Abstract

This invention relates to the field of gearbox testing technology, specifically disclosing a reliability testing device and method for a wind turbine yaw gearbox. The device includes a connecting mechanism, with a first testing mechanism and a second testing mechanism arranged on the outer side of the connecting mechanism to simulate the swaying and pushing of wind turbine blades. The invention uses the first testing mechanism, arranged in a ring array, to apply force to the rotating shaft radially, causing radial displacement of the shaft. This simulates the force exerted by the wind turbine blades on the gearbox when subjected to lateral wind force, closely reflecting the actual stress conditions of the wind turbine gearbox and improving the realism of the test. This facilitates a more thorough testing of the wind turbine gearbox's reliability. The second testing mechanism simulates the force exerted by the wind turbine blades on the gearbox when subjected to direct wind force, further improving the realism of the test.

Description

Technical Field

[0001] This invention relates to the field of gearbox testing technology, specifically to a reliability testing device and method for wind turbine yaw gearboxes. Background Technology

[0002] The purpose of reliability testing on wind turbine yaw gearboxes is to ensure the overall operational safety and efficiency of the wind turbine, verify design performance, and demonstrate its ability to adapt to extreme environments. Reliability testing simulates real-world environmental conditions to verify the gearbox's environmental adaptability and ensure stable operation throughout its entire lifecycle.

[0003] CN118883053A discloses a reliability testing system and method for wind turbine yaw gearboxes. The system aims to simulate various wind conditions through wind power testing components and simulate forward and reverse power supply through power testing components, thereby obtaining reliability data before actual use or during research and development.

[0004] Based on existing technologies, the following problems exist:

[0005] Existing reliability testing devices for wind turbine yaw gearboxes typically test the gearbox by simulating wind direction and applying force to the blades. However, due to the large size and weight of wind turbine blades, only small blades can usually be used for simulation. This results in unsatisfactory testing results by only simulating wind force and blades. Alternatively, a load motor can be connected to the wind turbine yaw gearbox and a load torque can be applied for testing. However, this method of detecting the transmission performance of the wind turbine yaw gearbox is limited. Referring to the aforementioned application documents, this method also only tests by simulating wind force, which has certain shortcomings. To solve the above problems, a reliability testing device and testing method based on wind turbine yaw gearboxes are proposed. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reliability testing device based on a wind turbine yaw gearbox, comprising a base frame, a wind turbine gearbox, and a load motor, and further comprising a connecting mechanism disposed inside the base frame for connecting the load motor and the wind turbine gearbox; a first testing mechanism and a second testing mechanism for simulating the swaying and pushing of wind turbine blades are disposed outside the connecting mechanism, and the first testing mechanism is arranged in a circular array; a rotating mechanism is disposed inside the base frame; and the connecting mechanism includes:

[0007] A rotating shaft is located inside the base frame. A sleeve is rotatably mounted on the side wall of the rotating shaft, and both ends of the shaft extend beyond the sleeve to connect to the load motor and the wind turbine gearbox, respectively. The rotating mechanism includes:

[0008] A first ring body is fixedly disposed on the inner side wall of the base frame and arranged at intervals. A second ring body is rotatably disposed on the inner wall of the first ring body. The first testing mechanism includes:

[0009] A cylindrical base is fixedly disposed on the inner wall of the second ring body and located between the two first ring bodies. The interior of the cylindrical base has a first groove and a second groove that are interconnected, and the second groove extends to the outside of the cylindrical base. The inner wall diameter of the second groove is smaller than the inner wall diameter of the first groove.

[0010] Furthermore, the connecting mechanism also includes:

[0011] An outer spline sleeve is slidably disposed on the outer wall of the sleeve, and an inner spline sleeve is fitted on the outer wall of the outer spline sleeve, wherein the axial length of the inner spline sleeve is less than the axial length of the outer spline sleeve.

[0012] A first ring plate is fixedly sleeved on the outer wall of the outer spline cylinder. A second ring plate is fixedly sleeved on the outer wall of the inner spline cylinder. A first spring is sleeved on the outer wall of the outer spline cylinder between the first ring plate and the second ring plate.

[0013] Furthermore, the connecting mechanism also includes:

[0014] Limiting grooves are arranged in a ring array on the inner wall of the outer splined cylinder. Limiting sliders are fitted on the inner wall of each limiting groove, and the limiting sliders are fixedly connected to the outer wall of the cylinder.

[0015] The limiting through grooves are arranged in a ring array on the outer wall of the outer splined cylinder and are staggered with the limiting slide grooves. The inner wall of each limiting through groove is fitted with a limiting plate, and the limiting plate is fixedly connected to the outer wall of the sleeve.

[0016] Furthermore, the first testing facility also includes:

[0017] A first electromagnet is fixedly disposed on the inner wall of a first groove. A second electromagnet is sleeved on the inner wall of the first groove. A connecting rod is fixedly disposed on the side of the second electromagnet away from the first electromagnet. The connecting rod extends along the second groove to the outside of the cylindrical base.

[0018] The hinge is fixed to the outer wall of the inner spline cylinder and hinged to the end of the connecting rod located outside the cylindrical seat, so that the hinge and the first connecting member can deflect radially along the inner spline cylinder.

[0019] Furthermore, the first testing facility also includes:

[0020] A fixing ring is fixedly sleeved on the inner wall of the first groove. A first pressure sensor is fixedly installed on the side of the fixing ring near the second electromagnet. A second spring is sleeved on the side wall of the connecting rod located between the fixing ring and the second electromagnet. Both the first pressure sensor and the fixing ring are sleeved on the side wall of the connecting rod.

[0021] The stop ring is fixedly sleeved on the side wall of the connecting rod and engages with the second groove to provide a stop.

[0022] Furthermore, the second testing facility includes:

[0023] An adjustment component is located at the end of the external spline cylinder furthest from the wind turbine gearbox to adjust the position that drives the external spline cylinder to move.

[0024] The housing is fixedly sleeved on the outer wall of the sleeve. A third electromagnet is fixedly installed on the inner wall of the housing. A fourth electromagnet is sleeved on the inner wall of the housing. A connecting ring is fixedly installed on the side of the fourth electromagnet away from the third electromagnet. A push plate is fixedly installed on the end of the connecting ring located outside the housing. The outer diameter of the connecting ring is smaller than the outer diameter of the fourth electromagnet.

[0025] The second pressure sensor is fixedly installed on the inner wall of the housing. The connecting ring is located on the side wall between the second pressure sensor and the fourth electromagnet and a third spring is sleeved on it. The third electromagnet, the fourth electromagnet, the second pressure sensor and the push plate are all designed in a ring shape and are all sleeved on the outer wall of the sleeve.

[0026] Furthermore, the adjustment component includes:

[0027] An adjusting seat is fixedly located at the end of the outer splined cylinder away from the wind turbine gearbox and is sleeved on the outer wall of the sleeve. An electric push rod is fixedly installed at the lower end of the inner side of the adjusting seat. The telescopic shaft of the electric push rod is equipped with a connecting frame. The connecting frame is U-shaped and extends around the sleeve to the upper end of the adjusting seat.

[0028] The abutment is fixedly installed on the side of the connecting frame near the push plate. The interior of the adjusting seat is provided with a through groove for moving the electric push rod telescopic shaft, the connecting frame and the abutment.

[0029] Furthermore, the adjustment component also includes:

[0030] A connecting seat is fixedly installed at the bottom of the connecting frame. A connecting groove is provided at the bottom of the connecting seat, and the diameter of the lower end of the inner wall of the connecting groove is smaller than the diameter of the upper end of the inner wall.

[0031] The connector is fitted into the inner wall of the connecting groove. The upper diameter of the side wall of the connector is larger than the lower diameter of the side wall, and the upper and lower diameters of the side wall of the connector are smaller than the upper and lower diameters of the inner wall of the connecting groove, respectively.

[0032] Furthermore, a mounting half-ring for fixing the first ring body is fixedly provided at the top of the bottom frame, and the rotating mechanism further includes:

[0033] A servo motor is fixedly mounted on the outside of one of the mounting half rings. The output shaft of the servo motor is fixedly mounted with a rotating rod extending into the inside of the first ring body via a coupling. A gear is fixedly sleeved on the side wall of the rotating rod.

[0034] The gear ring is fixedly sleeved on the outer wall of the second ring body and meshes with the gear;

[0035] An annular groove is formed on both sides of the outer wall of the second ring body. An annular slider is placed inside the annular groove. The outer wall of the annular slider is fixedly connected to the inner wall of the first ring body so that the second ring body can rotate.

[0036] This invention also provides a test method for a reliability testing device based on a wind turbine yaw gearbox. Using the aforementioned reliability testing device for a wind turbine yaw gearbox, the method includes the following steps:

[0037] S1: Install the load motor and wind turbine gearbox at both ends of the rotating shaft, fix the wind turbine gearbox to the base frame, and set the load motor and the first test mechanism to move together.

[0038] S2: After the load motor and wind turbine gearbox are installed, apply torque to the wind turbine gearbox through the load motor to test the wind turbine gearbox;

[0039] S3: During the test, the wind turbine gearbox is tested by simulating the shaking and pushing of the wind turbine blades through the first test mechanism and the second test mechanism.

[0040] This invention provides a reliability testing device and method based on a wind turbine yaw gearbox. Compared with existing technologies, it has the following advantages:

[0041] 1. The present invention applies force to the rotating shaft along the radial direction of the first test mechanism arranged in a ring array, thereby causing the rotating shaft to produce radial displacement, so as to simulate the situation in which the wind turbine blades exert force on the wind turbine gearbox when they are subjected to the lateral wind force, thus closely matching the actual stress situation of the wind turbine gearbox, improving the authenticity of the test, and thus facilitating a more thorough test of the reliability of the wind turbine gearbox.

[0042] The second testing mechanism simulates the force exerted by the wind turbine blades on the wind turbine gearbox when the wind turbine blades are subjected to a direct wind force, i.e., the force is applied to it along the axial direction of the shaft, which further improves the realism of the test and allows for a more thorough test of the reliability of the wind turbine gearbox.

[0043] 2. When the wind turbine gearbox is tested by the first test mechanism and the second test mechanism, the first test mechanism is not subjected to force or is subjected to a small force when the second test mechanism applies axial thrust to the shaft through the connecting mechanism. This avoids the second test mechanism from affecting the stability of the first test mechanism when applying axial force to the shaft, and does not affect the normal testing and use of the first and second test mechanisms.

[0044] 3. This invention drives the second ring to rotate via a rotating mechanism to cooperate with the first testing mechanism, applying radial force to the rotating shaft from different positions. This expands the angle of radial force application to the rotating shaft, thereby improving the effectiveness of wind turbine gearbox reliability testing. Furthermore, the rotating mechanism enables the external gear cylinder and adjustment components to rotate in tandem with the second testing mechanism, applying thrust to the rotating shaft from different positions. This further enhances the realism of simulating axial thrust on wind turbine blades, thereby improving the effectiveness of wind turbine gearbox reliability testing.

[0045] 4. This invention enables the load motor to follow the radial force applied to the shaft by the first test mechanism simulating the swaying of the wind turbine blades, so that when the load motor simulates the wind turbine blades applying a load to the wind turbine gearbox, it more closely matches the force applied by the wind turbine blades to the wind turbine gearbox, thereby enhancing the realism of the wind turbine gearbox test. Furthermore, by enabling the load motor to follow the displacement, it avoids damage to the load motor when applying radial force to the shaft. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of one side of the overall structure of the present invention;

[0047] Figure 2 This is a schematic diagram of the overall structure on the other side of the present invention;

[0048] Figure 3 This is a longitudinal sectional view of the bottom frame and an exploded view of the mounting semi-ring structure of the present invention;

[0049] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the bottom frame of the present invention;

[0050] Figure 5 This is a schematic diagram of the rotating mechanism structure of the present invention;

[0051] Figure 6 This is a schematic diagram of the connection mechanism, the first testing mechanism, and the second testing mechanism of the present invention;

[0052] Figure 7 This is a schematic diagram of the first testing mechanism and the connecting mechanism of the present invention;

[0053] Figure 8 This is a schematic diagram of the first testing mechanism structure of the present invention;

[0054] Figure 9 This is a longitudinal sectional view of the adjusting seat and housing of the present invention;

[0055] Figure 10 This is a schematic diagram of the second testing mechanism and the connecting mechanism of the present invention;

[0056] Figure 11 For the present invention Figure 10A magnified structural diagram of A in the middle;

[0057] Figure 12 This is a longitudinal sectional view of the connecting mechanism portion of the present invention;

[0058] Figure 13 This is an exploded structural diagram of the connecting mechanism of the present invention.

[0059] The reference numerals in the above figures are as follows: 1. Base frame; 2. Load motor; 3. Wind turbine gearbox; 4. Mounting half ring; 5. First test mechanism; 6. Rotation mechanism; 7. Connecting mechanism; 8. Second test mechanism;

[0060] 50. Fixing ring; 51. Connecting rod; 52. Cylindrical base; 53. Hinge; 54. Second groove; 55. Stop ring; 56. First groove; 57. First pressure sensor; 58. Second electromagnet; 59. First electromagnet;

[0061] 61. First ring body; 62. Servo motor; 63. Second ring body; 64. Gear; 65. Annular groove; 66. Gear ring;

[0062] 71. Inner splined sleeve; 72. Rotating shaft; 73. Outer splined sleeve; 74. Sleeve; 75. Limiting plate; 76. Second ring plate; 77. First ring plate; 78. Limiting through groove; 79. Limiting slide groove;

[0063] 81. Housing; 82. Adjustment assembly; 83. Third electromagnet; 84. Fourth electromagnet; 85. Second pressure sensor; 86. Connecting ring; 87. Push plate;

[0064] 821. Adjustment seat; 822. Backing plate; 823. Connecting frame; 824. Electric push rod; 825. Connecting seat; 826. Connecting groove; 827. Connecting piece. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Example 1, please refer to Figures 1-4 , Figure 7 , Figure 8 and Figure 12A reliability testing device based on a wind turbine yaw gearbox 64 includes a base frame 1, a wind turbine gearbox 3, and a load motor 2. It also includes a connecting mechanism 7 disposed inside the base frame 1 for connecting the load motor 2 and the wind turbine gearbox 3. A first testing mechanism 5 and a second testing mechanism 8 are disposed outside the connecting mechanism 7 for simulating wind turbine blade swaying and pushing. The first testing mechanism 5 is arranged in a circular array. A rotating mechanism 6 is disposed inside the base frame 1. The connecting mechanism 7 includes:

[0067] A rotating shaft 72 is disposed inside the bottom frame 1. A sleeve 74 is rotatably provided on the side wall of the rotating shaft 72, and both ends of the rotating shaft 72 extend outside the sleeve 74 to be connected to the load motor 2 and the wind turbine gearbox 3, respectively. The rotating mechanism 6 includes:

[0068] A first ring body 61 is fixedly disposed on the inner side wall of the bottom frame 1 and arranged at intervals. A second ring body 63 is rotatably disposed on the inner wall of the first ring body 61. The first testing mechanism 5 includes:

[0069] The cylindrical base 52 is fixedly disposed on the inner wall of the second ring body 63 and located between the two first ring bodies 61. The interior of the cylindrical base 52 has a first groove 56 and a second groove 54 that are interconnected. The second groove 54 extends to the outside of the cylindrical base 52, and the inner wall diameter of the second groove 54 is smaller than the inner wall diameter of the first groove 56.

[0070] In implementation of this invention, the transmission end of the wind turbine gearbox 3 to be tested is connected and fixed to one end of the rotating shaft 72, and the wind turbine gearbox 3 is fixed to the base frame 1. The output shaft of the load motor 2 is connected and fixed to the other end of the rotating shaft 72, and the load motor 2 is connected and fixed to the housing 81. This allows the load motor 2 to follow the radial force applied to the rotating shaft 72 by the first test mechanism 5 simulating the swaying of the wind turbine blades. This makes the load motor 2 more closely resemble the force applied to the wind turbine gearbox 3 by the wind turbine blades when simulating the load applied by the wind turbine blades, enhancing the realism of the test on the wind turbine gearbox 3. Furthermore, the displacement of the load motor 2 avoids damage to the load motor 2 when applying radial force to the rotating shaft 72.

[0071] After the load motor 2 and the wind turbine gearbox 3 are installed, the load motor 2 drives the rotating shaft 72 to rotate, thereby applying torque to the transmission end of the wind turbine gearbox 3 to perform a load test on the wind turbine gearbox 3. During the test, the first test mechanism 5 arranged in a ring array applies force to the rotating shaft 72 radially, thereby causing the rotating shaft 72 to produce radial displacement, simulating the situation where the wind turbine blades exert force on the wind turbine gearbox 3 when they are subjected to lateral wind force. This closely matches the actual stress situation of the wind turbine gearbox 3, improves the authenticity of the test, and facilitates a more thorough test of the reliability of the wind turbine gearbox 3. The second testing mechanism 8 simulates the force exerted by the wind turbine blades on the wind turbine gearbox 3 when the wind turbine blades are directly blown towards them, i.e., the force is applied to it in the axial direction of the rotating shaft 72, which further improves the realism of the test and allows for a more thorough test of the reliability of the wind turbine gearbox 3. When the wind turbine gearbox 3 is tested by the first testing mechanism 5 and the second testing mechanism 8, the first testing mechanism 5 is not subjected to any force or is subjected to a small force when the second testing mechanism 8 applies an axial force to the rotating shaft 72, thereby avoiding the second testing mechanism 8 from affecting the stability of the first testing mechanism 5 when applying an axial force to the rotating shaft 72, and without affecting the normal testing and use of the first testing mechanism 5 and the second testing mechanism 8.

[0072] In addition, the rotating mechanism 6 drives the second ring 63 to rotate, so as to cooperate with the first test mechanism 5 and apply radial force to the rotating shaft 72 from different positions. This can expand the angle of radial force applied to the rotating shaft 72, thereby improving the effectiveness of the reliability test of the wind turbine gearbox 3. Furthermore, the rotating mechanism 6 can make the outer gear 64 cylinder and the adjusting component 82 rotate together, so as to cooperate with the second test mechanism 8 and apply thrust to the rotating shaft 72 from different positions, further improving the realism of simulating the axial thrust of the wind turbine blade, thereby improving the effectiveness of the reliability test of the wind turbine gearbox 3.

[0073] In this application, the wind turbine gearbox 3 is abbreviated as wind turbine yaw gearbox 64. This application monitors the torque and deflection of the shaft at the transmission end of the wind turbine gearbox 3 through external torque and displacement sensors to monitor power transmission and structural status, thereby determining the transmission status and structural status of the wind turbine gearbox 3 when the load motor 2, the first test mechanism 5, and the second test mechanism 8 apply torque, sway, and push to the wind turbine gearbox 3 through the rotating shaft 72. The torque sensor can be set at the end of the rotating shaft 72 close to the load motor 2 and the wind turbine gearbox 3, and on the rotating rod that drives the input end of the wind turbine gearbox 3 to rotate. This is prior art and will not be described in detail here.

[0074] Please see Figure 6 , Figure 12 and Figure 13 The connecting mechanism 7 further includes:

[0075] An outer spline sleeve 73 is slidably disposed on the outer wall of a sleeve 74. An inner spline sleeve 71 is sleeved on the outer wall of the outer spline sleeve 73, and the axial length of the inner spline sleeve 71 is less than the axial length of the outer spline sleeve 73.

[0076] A first ring plate 77 is fixedly sleeved on the outer wall of the outer spline cylinder 73. A second ring plate 76 is fixedly sleeved on the outer wall of the inner spline cylinder 71. A first spring is sleeved on the outer wall of the outer spline cylinder 73 between the first ring plate 77 and the second ring plate 76.

[0077] The connecting mechanism 7 further includes:

[0078] Limiting grooves 79 are arranged in a ring array on the inner wall of the outer spline cylinder 73. Limiting sliders are fitted on the inner wall of each limiting groove 79, and the limiting sliders are fixedly connected to the outer wall of the sleeve 74.

[0079] The limiting through grooves 78 are arranged in a ring array on the outer wall of the outer spline cylinder 73 and are staggered with the limiting slide grooves 79. The inner wall of each limiting through groove 78 is fitted with a limiting plate 75, and the limiting plate 75 is fixedly connected to the outer wall of the sleeve 74.

[0080] In practical implementation, the load motor 2 and the wind turbine gearbox 3 are connected to both ends of the rotating shaft 72, which facilitates the reliability testing of the wind turbine gearbox 3. The sleeve 74 is rotatably connected to the rotating shaft 72 so that the rotation of the rotating shaft 72 does not cause the sleeve 74 to rotate. The outer splined sleeve 73 can slide along the outer wall of the sleeve 74 through the limiting groove 79. When the second test mechanism 8 pushes the outer splined sleeve 73 axially, it moves along the limiting plate 75 through the limiting groove 78. When it cannot move further, the outer splined sleeve 73 presses or impacts the limiting plate 75, thereby pressing or rotating the sleeve 74 and the rotating shaft 72, thus applying an axial force to the rotating shaft 72. During this process, the... The inner splined cylinder 71 is sleeved on the outer wall of the outer splined cylinder 73. That is, when the inner splined cylinder 71 moves axially, it does not drive the first test mechanism 5 to work. This avoids the axial force applied to the rotating shaft 72 acting on the first test mechanism 5 together, so as to avoid affecting the stability of the first test mechanism 5. When the first test mechanism 5 applies a radial force to the rotating shaft 72, the rotating shaft 72 and the second test mechanism 8 are positioned accordingly. Since the radial force on the rotating shaft 72 is achieved through multiple sets of first test mechanisms 5, it is relatively stable and will not affect the structural stability of the second test mechanism 8 or has a small impact. It also enables the load motor 2 to follow the rotating shaft 72 to generate displacement, further improving the test effect.

[0081] The limiting plate 75 and the limiting through groove 78 facilitate the second testing mechanism 8 to apply axial force to the limiting plate 75, thereby applying it to the sleeve 74 and the rotating shaft 72, without acting on the inner splined sleeve 71.

[0082] The first ring plate 77, the second ring plate 76 and the first spring facilitate the first testing mechanism 5 to apply axial force to the rotating shaft 72 on one side, and then cooperate with the third spring of the second testing mechanism 8 to reset the fourth electromagnet 84 and the outer spline cylinder 73, so as to facilitate the next application of axial force.

[0083] The inner spline cylinder 71, the outer spline cylinder 73, and the limiting slide groove 79 work together to allow the outer spline cylinder 73 to slide relative to the inner spline cylinder 71 and the sleeve 74, which facilitates the application of axial force to the rotating shaft 72 and makes it easier for the rotating mechanism 6 to drive the first testing mechanism 5 and the adjusting component 82 to rotate, thereby improving the actual testing effect of the first testing mechanism 5 and the second testing mechanism 8.

[0084] Please see Figures 6-8 The first testing unit 5 also includes:

[0085] A first electromagnet 59 is fixedly disposed on the inner wall of a first groove 56. A second electromagnet 58 is sleeved on the inner wall of the first groove 56. A connecting rod 51 is fixedly disposed on the side of the second electromagnet 58 away from the first electromagnet 59. The connecting rod 51 extends along the second groove 54 to the outside of the cylindrical base 52.

[0086] The hinge 53 is fixedly disposed on the outer wall of the inner spline cylinder 71 and is hinged to one end of the connecting rod 51 located outside the cylindrical seat 52, so that the hinge 53 and the first connecting member 827 can deflect radially along the inner spline cylinder 71.

[0087] The first testing mechanism 5 also includes:

[0088] A fixing ring 50 is fixedly sleeved on the inner wall of the first groove 56. A first pressure sensor 57 is fixedly installed on the side of the fixing ring 50 near the second electromagnet 58. A second spring is sleeved on the side wall of the connecting rod 51 located between the fixing ring 50 and the second electromagnet 58. The first pressure sensor 57 and the fixing ring 50 are both sleeved on the side wall of the connecting rod 51.

[0089] The stop ring 55 is fixedly sleeved on the side wall of the connecting rod 51 and engages with the second groove 54 in a stop-stop manner.

[0090] In practical implementation, by bringing the first electromagnet 59 and the second electromagnet 58 close to each other, a repulsive force is generated, which in turn pushes the second electromagnet 58 and the connecting rod 51 to move. Furthermore, by setting up multiple first test mechanisms 5 arranged in a ring array, the multiple first test mechanisms 5 cooperate to apply radial force to the inner spline cylinder 71 from different angles and positions, thereby enabling the radial force to be applied to the rotating shaft 72 to simulate the wind turbine fan blade being subjected to crosswinds and to test the wind turbine gearbox 3. In addition, the hinge 53 allows for changes in the radial angle between the connecting rod 51 and the inner spline cylinder 71, which facilitates the actual application of radial force.

[0091] When the first electromagnet 59 and the second electromagnet 58 apply radial force to the rotating shaft 72, the second electromagnet 58 squeezes the second spring and the first pressure sensor 57, thereby determining the magnitude of the radial force applied to the rotating shaft 72, which is convenient for actual testing. The second spring still maintains its elasticity when the first electromagnet 59 and the second electromagnet 58 are at their farthest distance, so as to avoid the second spring not squeezing the first pressure sensor 57 when the second electromagnet 58 and the first electromagnet 59 are at their farthest positions, thus always being able to monitor the axial force applied to the rotating shaft 72.

[0092] The stop ring 55 compresses the second spring to a specified degree and then presses it against the first groove 56 of the cylindrical seat 52, thereby avoiding excessive compression and damage to the first pressure sensor 57, etc., and limiting the compression distance to prevent excessive radial twisting of the rotating shaft 72.

[0093] Please see Figure 5 The top of the base frame 1 is fixedly provided with a mounting half-ring 4 for fixing the first ring body 61, and the rotating mechanism 6 further includes:

[0094] A servo motor 62 is fixedly mounted on the outside of one of the mounting half rings 4. The output shaft of the servo motor 62 is fixedly mounted with a rotating rod extending to the inside of the first ring body 61 via a coupling. A gear 64 is fixedly sleeved on the side wall of the rotating rod.

[0095] The toothed ring 66 is fixedly sleeved on the outer wall of the second ring body 63 and meshes with the gear 64;

[0096] An annular groove 65 is formed on both sides of the outer wall of the second ring body 63. An annular slider is placed inside the annular groove 65. The outer wall of the annular slider is fixedly connected to the inner wall of the first ring body 61 so that the second ring body 63 can rotate.

[0097] In practical implementation, the servo motor 62 drives the gear 64 to rotate, thereby driving the gear ring 66 and the second ring body 63 to rotate under the limit of the annular slide groove 65 and the annular slider, so as to adjust the position of the first test mechanism 5 arranged in the annular array. This facilitates the adjustment of the position and angle of the radial force applied to the rotating shaft 72, so as to simulate the wind turbine blades being subjected to different angles of lateral wind and acting on the wind turbine gearbox 3, thereby improving the test effect of the wind turbine gearbox 3. Furthermore, the inner spline cylinder 71 and the outer spline cylinder 73 enable the rotating mechanism 6 to drive the adjustment component 82 to rotate, thereby adjusting the position of the abutment plate 822 to cooperate with the second test mechanism 8, so as to apply axial force to the rotating shaft 72 from different positions, further improving the test effect of the wind turbine gearbox 3.

[0098] Example 2, please refer to Figures 9-11 The technical difference between this embodiment and Embodiment 1 is that the second testing mechanism 8 includes:

[0099] Adjustment component 82 is located at the end of the external spline cylinder 73 away from the wind turbine gearbox 3, for adjusting the position that drives the external spline cylinder 73 to move;

[0100] The housing 81 is fixedly sleeved on the outer wall of the sleeve 74. The inner wall of the housing 81 is fixedly provided with a third electromagnet 83 and a fourth electromagnet 84 is sleeved on the inner wall of the housing 81. A connecting ring 86 is fixedly provided on the side of the fourth electromagnet 84 away from the third electromagnet 83. A push plate 87 is fixedly provided at the end of the connecting ring 86 located outside the housing 81. The outer diameter of the connecting ring 86 is smaller than the outer diameter of the fourth electromagnet 84.

[0101] The second pressure sensor 85 is fixedly installed on the inner wall of the housing 81. The connecting ring 86 is located on the side wall between the second pressure sensor 85 and the fourth electromagnet 84 and a third spring is sleeved on it. The third electromagnet 83, the fourth electromagnet 84, the second pressure sensor 85 and the push plate 87 are all designed in a ring shape and are all sleeved on the outer wall of the sleeve 74.

[0102] The adjustment component 82 includes:

[0103] Adjustment seat 821 is fixedly installed at the end of the outer spline cylinder 73 away from the wind turbine gearbox 3, and sleeved on the outer wall of sleeve 74. An electric push rod 824 is fixedly installed at the lower end of the inner side of adjustment seat 821. The telescopic shaft of electric push rod 824 is provided with a connecting frame 823. The connecting frame 823 is U-shaped and extends around sleeve 74 to the upper end of adjustment seat 821.

[0104] The abutment plate 822 is fixedly installed on the side of the connecting frame 823 near the push plate 87. The interior of the adjusting seat 821 is provided with a through groove for moving the telescopic shaft of the electric push rod 824, the connecting frame 823 and the abutment plate 822.

[0105] The adjustment component 82 further includes:

[0106] A connecting seat 825 is fixedly disposed at the bottom of the connecting frame 823. A connecting groove 826 is provided at the bottom of the connecting seat 825. The diameter of the lower end of the inner wall of the connecting groove 826 is smaller than the diameter of the upper end of the inner wall.

[0107] The connector 827 is fitted onto the inner wall of the connecting groove 826. The upper diameter of the side wall of the connector 827 is larger than the lower diameter of the side wall, and the upper and lower diameters of the side wall of the connector 827 are smaller than the upper and lower diameters of the inner wall of the connecting groove 826, respectively.

[0108] In practice, the third electromagnet 83 and the fourth electromagnet 84 are activated, causing a repulsive force to be generated on the side where the third electromagnet 83 and the fourth electromagnet 84 are close to each other. This repulsive force drives the fourth electromagnet 84, the connecting ring 86, and the push plate 87 to move, thereby pushing the abutment plate 822, the connecting frame 823, and the adjusting seat 821 to move. This causes the outer spline cylinder 73 to move axially along the sleeve 74. When the outer spline cylinder 73 is pressed against the limiting plate 75, the axial movement of the outer spline cylinder 73 squeezes the limiting plate 75 and the sleeve 74, thereby applying an axial force to the rotating shaft 72. This simulates the test of a wind turbine fan blade being subjected to direct wind force on the wind turbine gearbox 3, improving the test effect. Furthermore, the abutment plate 822 limits the movement of the outer spline cylinder 73, preventing the outer spline cylinder 73 and the adjusting seat 821 from squeezing the inner spline cylinder 71, thus avoiding affecting the stability of the first test mechanism 5.

[0109] The electric push rod 824 adjusts the position of the connecting frame 823 and the abutment plate 822, thereby adjusting the position of the push plate 87 pressing the abutment plate 822. This adjusts the position of the axial force applied by the second test mechanism 8 to the rotating shaft 72, thus simulating the test of the wind turbine gearbox 3 under axial force on different positions of the wind turbine blade, improving the test effect. Furthermore, by cooperating with the rotating mechanism 6, it can drive the adjusting seat 821 to rotate, so that the abutment plate 822 can rotate. In cooperation with the push plate 87, the push plate 87 can push the abutment plate 822 to move in more positions, further improving the test effect.

[0110] By setting the connecting seat 825 and fitting the connecting piece 827 into the connecting groove 826, when the push plate 87 applies force to the connecting frame 823 and the adjusting seat 821, the connecting piece 827 does not contact the connecting groove 826, so that the axial force acts on the telescopic shaft of the electric push rod 824, thus avoiding damage to the electric push rod 824, facilitating long-term use, and not affecting the height adjustment of the abutment plate 822.

[0111] The second pressure sensor 85 and the third spring facilitate monitoring of the axial thrust on the rotating shaft 72, making it convenient for actual testing.

[0112] This invention also provides a testing method for a reliability testing device based on a wind turbine yaw gearbox 64. The method includes the following steps:

[0113] S1: Install the load motor 2 and the wind turbine gearbox 3 at both ends of the rotating shaft 72, and fix the wind turbine gearbox 3 to the bottom frame 1, so that the load motor 2 and the first test mechanism 5 are set to move together.

[0114] S2: After the load motor 2 and the wind turbine gearbox 3 are installed, the load motor 2 applies torque to the wind turbine gearbox 3 to test the wind turbine gearbox 3.

[0115] S3: During the test, the wind turbine gearbox 3 is tested by simulating the shaking and pushing of the wind turbine blades through the first test mechanism 5 and the second test mechanism 8.

[0116] The servo motor and the first pressure sensor of the present invention are all connected to the controller and the external power supply through wires to facilitate actual control and use. Since the rotating mechanism can drive the second ring to rotate, the rotating mechanism can drive the second ring to rotate back and forth for easy wiring. The specific wiring can be designed by those skilled in the art according to the actual use. The specific wiring is prior art and will not be described in detail here.

[0117] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0118] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0119] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reliability testing device based on a wind turbine yaw gearbox, comprising a base frame, a wind turbine gearbox, and a load motor, characterized in that, It also includes a connecting mechanism located inside the bottom frame for connecting the load motor and the wind turbine gearbox. Outside the connecting mechanism are a first test mechanism and a second test mechanism for simulating the swaying and pushing of wind turbine blades. The first test mechanism is arranged in a circular array. A rotating mechanism is located inside the bottom frame. The connecting mechanism includes: A rotating shaft is located inside the base frame. A sleeve is rotatably mounted on the side wall of the rotating shaft, and both ends of the shaft extend beyond the sleeve to connect to the load motor and the wind turbine gearbox, respectively. The rotating mechanism includes: A first ring body is fixedly disposed on the inner side wall of the base frame and arranged at intervals. A second ring body is rotatably disposed on the inner wall of the first ring body. The first testing mechanism includes: A cylindrical base is fixedly disposed on the inner wall of the second ring body and located between the two first ring bodies. The cylindrical base has a first groove and a second groove that communicate with each other inside, and the second groove extends outside the cylindrical base. The inner wall diameter of the second groove is smaller than the inner wall diameter of the first groove. The connecting mechanism further includes: An outer spline sleeve is slidably disposed on the outer wall of the sleeve, and an inner spline sleeve is fitted on the outer wall of the outer spline sleeve, wherein the axial length of the inner spline sleeve is less than the axial length of the outer spline sleeve. A first ring plate is fixedly sleeved on the outer wall of the outer splined cylinder. A second ring plate is fixedly sleeved on the outer wall of the inner splined cylinder. A first spring is sleeved on the outer wall of the outer splined cylinder between the first and second ring plates. The first testing mechanism further includes: A first electromagnet is fixedly disposed on the inner wall of a first groove. A second electromagnet is sleeved on the inner wall of the first groove. A connecting rod is fixedly disposed on the side of the second electromagnet away from the first electromagnet. The connecting rod extends along the second groove to the outside of the cylindrical base. A hinge is fixed to the outer wall of the inner splined cylinder and hinged to one end of the connecting rod located outside the cylindrical seat, so that the hinge and the connecting rod can deflect radially along the inner splined cylinder. The second test mechanism includes: An adjustment component is located at the end of the external spline cylinder furthest from the wind turbine gearbox to adjust the position that drives the external spline cylinder to move. The housing is fixedly sleeved on the outer wall of the sleeve. A third electromagnet is fixedly installed on the inner wall of the housing. A fourth electromagnet is sleeved on the inner wall of the housing. A connecting ring is fixedly installed on the side of the fourth electromagnet away from the third electromagnet. A push plate is fixedly installed on the end of the connecting ring located outside the housing. The outer diameter of the connecting ring is smaller than the outer diameter of the fourth electromagnet. The second pressure sensor is fixedly installed on the inner wall of the housing. The connecting ring is located on the side wall between the second pressure sensor and the fourth electromagnet and a third spring is sleeved on it. The third electromagnet, the fourth electromagnet, the second pressure sensor and the push plate are all designed in a ring shape and are all sleeved on the outer wall of the sleeve.

2. The reliability testing device based on a wind turbine yaw gearbox according to claim 1, characterized in that, The connecting mechanism further includes: Limiting grooves are arranged in a ring array on the inner wall of the outer splined cylinder. Limiting sliders are fitted on the inner wall of each limiting groove, and the limiting sliders are fixedly connected to the outer wall of the cylinder. The limiting through grooves are arranged in a ring array on the outer wall of the outer splined cylinder and are staggered with the limiting slide grooves. The inner wall of each limiting through groove is fitted with a limiting plate, and the limiting plate is fixedly connected to the outer wall of the sleeve.

3. The reliability testing device based on a wind turbine yaw gearbox according to claim 1, characterized in that, The first testing facility also includes: A fixing ring is fixedly sleeved on the inner wall of the first groove. A first pressure sensor is fixedly installed on the side of the fixing ring near the second electromagnet. A second spring is sleeved on the side wall of the connecting rod located between the fixing ring and the second electromagnet. Both the first pressure sensor and the fixing ring are sleeved on the side wall of the connecting rod. The stop ring is fixedly sleeved on the side wall of the connecting rod and engages with the second groove to provide a stop.

4. The reliability testing device based on a wind turbine yaw gearbox according to claim 1, characterized in that, The adjustment component includes: An adjusting seat is fixedly located at the end of the outer splined cylinder away from the wind turbine gearbox and is sleeved on the outer wall of the sleeve. An electric push rod is fixedly installed at the lower end of the inner side of the adjusting seat. The telescopic shaft of the electric push rod is equipped with a connecting frame. The connecting frame is U-shaped and extends around the sleeve to the upper end of the adjusting seat. The abutment is fixedly installed on the side of the connecting frame near the push plate. The interior of the adjusting seat is provided with a through groove for moving the electric push rod telescopic shaft, the connecting frame and the abutment.

5. A reliability testing device based on a wind turbine yaw gearbox according to claim 4, characterized in that, The adjustment component further includes: A connecting seat is fixedly installed at the bottom of the connecting frame. A connecting groove is provided at the bottom of the connecting seat, and the diameter of the lower end of the inner wall of the connecting groove is smaller than the diameter of the upper end of the inner wall. The connector is fitted into the inner wall of the connecting groove. The upper diameter of the side wall of the connector is larger than the lower diameter of the side wall, and the upper and lower diameters of the side wall of the connector are smaller than the upper and lower diameters of the inner wall of the connecting groove, respectively.

6. The reliability testing device based on a wind turbine yaw gearbox according to claim 1, characterized in that, The top of the base frame is fixedly provided with a mounting half-ring for fixing the first ring body, and the rotating mechanism further includes: A servo motor is fixedly mounted on the outside of one of the mounting half rings. The output shaft of the servo motor is fixedly mounted with a rotating rod extending into the inside of the first ring body via a coupling. A gear is fixedly sleeved on the side wall of the rotating rod. The gear ring is fixedly sleeved on the outer wall of the second ring body and meshes with the gear; An annular groove is formed on both sides of the outer wall of the second ring body. An annular slider is placed inside the annular groove. The outer wall of the annular slider is fixedly connected to the inner wall of the first ring body so that the second ring body can rotate.

7. A test method for a reliability testing device based on a wind turbine yaw gearbox, characterized in that, The reliability testing device based on a wind turbine yaw gearbox according to any one of claims 1-6 includes the following steps: S1: Install the load motor and wind turbine gearbox at both ends of the rotating shaft, fix the wind turbine gearbox to the base frame, and set the load motor and the first test mechanism to move together. S2: After the load motor and wind turbine gearbox are installed, apply torque to the wind turbine gearbox through the load motor to test the wind turbine gearbox; S3: During the test, the wind turbine gearbox is tested by simulating the shaking and pushing of the wind turbine blades through the first test mechanism and the second test mechanism.

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