Rear rack of wind generating set

Abstract

The invention discloses a rear rack of a wind generating set. The rear rack comprises two main longitudinal beams, a generator mounting bracket and an adjusting driving mechanism, wherein the two main longitudinal beams extend front and back and are arranged in parallel; the generator mounting bracket is mounted between the two main longitudinal beams and can swing up and down for adjustment; the adjustment driving mechanism is used for driving the generator mounting bracket to perform swing adjustment, so that the inclination of the generator mounting surface can be adjusted within a certain range, the inclination angle of the generator mounted on the generator mounting seat is adjusted, and the universal suitability of the generator with different transmission chains is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine generator sets, in particular to a rear frame of a wind turbine generator set. BACKGROUND

[0002] The rear frame of a wind turbine generator set is used to install a generator, and the installation platform of the generator of the rear frame has a certain slope, which is inclined downward from front to back, so that the generator installed on the installation platform can be adapted to the transmission chain in front.

[0003] A wind turbine rear frame is disclosed in Chinese Utility Model Patent No. CN218407681U, which comprises two front and rear extending main beams, a first auxiliary beam and a second auxiliary beam fixedly connected between the two main beams, the first auxiliary beam being located on the front side of the second auxiliary beam, and the top surface of the first auxiliary beam being higher than the top surface of the second auxiliary beam. The top surfaces of the first auxiliary beam and the second auxiliary beam are respectively provided with a generator mounting seat for installing a generator.

[0004] Since the first auxiliary beam and the second auxiliary beam are respectively fixedly connected with the main beams, the slope between the generator mounting seat on the top surface of the first auxiliary beam and the generator mounting seat on the top surface of the second auxiliary beam is fixed and cannot be adjusted. The slope of the generator installed on the generator mounting seat is also fixed and cannot be adjusted, and can only be adapted to a specific transmission chain inclination angle, which has poor universality. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a rear frame of a wind turbine generator set, which can adjust the inclination angle of the generator mounting seat surface by adjusting the driving mechanism to swing the generator mounting bracket up and down through the pivot shaft, so that the slope of the generator mounting surface can be adjusted within a certain range, improving the universal adaptability.

[0006] The technical scheme of the present application provides a rear frame of a wind turbine generator set, which comprises two front and rear extending and parallel arranged main longitudinal beams, a generator mounting bracket installed between the two main longitudinal beams and capable of swinging up and down for adjustment, and an adjustment driving mechanism connected between the main longitudinal beams and the generator mounting bracket.

[0007] The generator mounting bracket comprises a front cross beam, a rear cross beam and a generator mounting seat connected on the rear cross beam and the front cross beam.

[0008] Both sides of the generator mounting seat are respectively provided with a pivot shaft, and each pivot shaft is pivotally connected with the corresponding side of the main longitudinal beam.

[0009] Both ends of the front cross beam and the rear cross beam are respectively connected with the main longitudinal beam through a locking element.

[0010] The main longitudinal beam is provided with arc-shaped adjustment holes arranged concentrically with the pivot shaft at positions corresponding to the rear crossbeam and the front crossbeam. The locking element passes through the arc-shaped adjustment holes and can slide along the arc-shaped adjustment holes to adjust its position.

[0011] The adjustment drive mechanism is connected between the main longitudinal beam and the front crossbeam / rear crossbeam. The adjustment drive mechanism is used to drive the generator mounting bracket to swing, so as to adjust the tilt angle of the generator mounting base.

[0012] In one of the alternative technical solutions, two sets of the adjustment drive mechanisms are included, with one set of the adjustment drive mechanism configured between each of the main longitudinal beams and the front crossbeam / rear crossbeam.

[0013] In one of the alternative technical solutions, the rear crossbeam and the front crossbeam are respectively provided with crossbeam end plates at both ends, and each crossbeam end plate is provided with an arc-shaped mounting hole that matches the arc-shaped adjustment hole, and the locking element can slide and adjust along the arc-shaped mounting hole;

[0014] The locking element passes through the arc-shaped adjustment hole and the arc-shaped assembly hole in sequence, and locks the crossbeam end plate to the main longitudinal beam.

[0015] In one of the optional technical solutions, the main longitudinal beam is provided with two arc-shaped adjustment holes arranged at intervals between the front and rear ends, corresponding to the ends of the rear crossbeam and the front crossbeam.

[0016] The end plate of the crossbeam is provided with two arc-shaped assembly holes accordingly;

[0017] The ends of the rear crossbeam and the front crossbeam are respectively connected to the main longitudinal beam through two sets of locking elements, and each set of locking elements passes through a set of arc-shaped adjustment holes and arc-shaped assembly holes in sequence.

[0018] In one of the alternative technical solutions, the two ends of the front crossbeam are respectively provided with forward-extending crossbeam extension arms;

[0019] The adjustment drive mechanism is connected between the main longitudinal beam and the crossbeam extension arm.

[0020] In one of the alternative technical solutions, the adjustment drive mechanism includes a drive motor installed on the inner side of the main longitudinal beam and capable of swinging back and forth, and a transmission screw connected to the drive motor and extending vertically.

[0021] The crossbeam extension arm is provided with a connecting arm extending toward the main longitudinal beam, and the connecting arm is provided with an internal threaded hole.

[0022] The drive screw passes through the internal threaded hole and is threadedly connected.

[0023] When the drive motor drives the transmission screw to rotate, the front crossbeam can swing up and down relative to the pivot axis, and the drive motor can adaptively swing back and forth to keep the transmission screw and the internal threaded hole concentrically arranged.

[0024] In one of the alternative technical solutions, the drive motor is pivotally connected to the main longitudinal beam via a connecting shaft, and the connecting shaft is arranged parallel to the front crossbeam.

[0025] In one of the alternative technical solutions, a connecting seat is provided on the inner side of the main longitudinal beam, and the connecting seat is provided with a receiving groove, the cross section of which is semi-circular along the front-back direction;

[0026] The bottom of the drive motor is provided with a motor base, and the cross section of the motor base along the front-to-back direction is also semi-circular. The connecting shaft is connected to the motor base.

[0027] The motor base is movably mounted in the receiving groove, and the connecting shaft is pivotally connected to the groove wall of the receiving groove.

[0028] In one of the alternative technical solutions, the adjustment drive mechanism includes a drive motor installed on the inner side of the main longitudinal beam and capable of sliding back and forth, a rotating rod connected to the drive motor and extending vertically, and a transmission screw hinged to the upper end of the rotating rod; the crossbeam extension arm is provided with a connecting arm extending toward the main longitudinal beam, the connecting arm is provided with an internal threaded hole, and the transmission screw passes through the internal threaded hole and is threadedly connected.

[0029] In one of the alternative technical solutions, the main longitudinal beam includes a longitudinal beam bottom plate, a longitudinal beam main plate, and a longitudinal beam top plate connected in sequence in an I-shape;

[0030] The arc-shaped adjustment hole is provided on the longitudinal beam main board, and the two ends of the front crossbeam and the rear crossbeam are respectively connected to the longitudinal beam main board through the locking element;

[0031] The pivot shaft is pivotally connected to the main longitudinal beam;

[0032] The drive motor is located inside the main body of the longitudinal beam and between the bottom plate and the top plate of the longitudinal beam.

[0033] In one of the alternative technical solutions, the bottom surface of the beam extension arm is an extension arm slope, which gradually extends upward in the direction from back to front to avoid the drive motor below.

[0034] The above technical solution has the following beneficial effects:

[0035] The rear frame of the wind turbine generator set provided by this invention includes two main longitudinal beams, a generator mounting bracket, and an adjustment drive mechanism. The generator mounting bracket includes a front crossbeam, a rear crossbeam, and a generator mounting seat connected between the front and rear crossbeams. The generator mounting seat is pivotally connected to the main longitudinal beams on both sides via pivot shafts. Therefore, the generator mounting bracket can be adjusted up and down relative to the main longitudinal beams to adjust the tilt angle of the generator mounting seat. Arc-shaped adjustment holes are provided on the two main longitudinal beams corresponding to the positions of the front and rear crossbeams. These arc-shaped adjustment holes are concentrically arranged with the pivot shafts and are used for locking elements to pass through, adjust their position, and lock. The front and rear crossbeams are connected to the two main longitudinal beams via locking elements. Therefore, the rear and front crossbeams can be adjusted by their respective locking elements, and their positions relative to the main longitudinal beams can be adjusted along their respective arc-shaped adjustment holes.

[0036] The generator mounting base is located on the top surface of the rear crossbeam and the front crossbeam. The top surface of the generator mounting base is the generator mounting surface, which naturally has a forward and upward slope.

[0037] The adjustment drive mechanism is connected between the main longitudinal beam and the front / rear crossbeam, and is used to drive the generator mounting bracket to swing and adjust. Both the front and rear crossbeams can be adjusted in position along the trajectory defined by the corresponding arc-shaped adjustment holes, which can adjust the slope of the generator mounting surface. This allows the slope of the generator mounting surface to be adjusted within a certain range, thereby adjusting the tilt angle of the generator mounted on the generator mounting base and improving its universal compatibility with different drive chains.

[0038] When users need to place the generator on the generator mounting base, they can first lower the front end of the generator mounting base to make the generator mounting surface roughly horizontal so that the generator can be placed on the generator mounting base for fixation. This can avoid the risk of the generator slipping when placed on an inclined generator mounting surface. Attached Figure Description

[0039] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0040] Figure 1 A perspective view of the rear frame of a wind turbine generator set provided in an embodiment of the present invention, taken from one viewpoint.

[0041] Figure 2 A perspective view of the rear frame of a wind turbine generator set provided in an embodiment of the present invention from another angle;

[0042] Figure 3 This is a side view of the rear frame of a wind turbine generator set according to an embodiment of the present invention;

[0043] Figure 4A perspective view of the generator mounting bracket from one angle;

[0044] Figure 5 A perspective view of the generator mounting bracket from another angle;

[0045] Figure 6 A cross-sectional view of an adjustment drive mechanism connected between a connecting seat and a connecting arm;

[0046] Figure 7 for Figure 6 Exploded view;

[0047] Figure 8 A cross-sectional view of an adjustment drive mechanism connected between the connecting seat and the connecting arm in another manner;

[0048] Figure 9 for Figure 8 A schematic diagram in the side view direction;

[0049] Figure 10 This is a schematic diagram showing the connecting arm moving upward on the transmission screw and the drive motor moving forward within the guide groove of the connecting seat. Attached image description:

[0051] Main longitudinal beam 1, longitudinal beam bottom plate 11, longitudinal beam main plate 12, longitudinal beam top plate 13, arc-shaped adjustment hole 14, connecting seat 15, receiving groove 16, guide groove 17, guide rail 18;

[0052] 2. Generator mounting bracket, 21. Front crossbeam, 22. Rear crossbeam, 23. Generator mounting base, 24. Pivot shaft, 25. Crossbeam end plate, 26. Arc-shaped assembly hole, 27. Crossbeam extension arm, 28. Connecting arm, 29. Threaded hole.

[0053] Adjustment drive mechanism 3, drive motor 31, transmission screw 32, motor base 33, connecting shaft 34, cover 35, rotating rod 36, hinge shaft 37. Detailed Implementation

[0054] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0055] like Figures 1-5 As shown, an embodiment of the present invention provides a rear frame of a wind turbine generator set, including two main longitudinal beams 1 that extend forward and backward and are arranged in parallel, a generator mounting bracket 2 installed between the two main longitudinal beams 1 and capable of swinging up and down, and an adjustment drive mechanism 3 connected between the main longitudinal beams 1 and the generator mounting bracket 2.

[0056] The generator mounting bracket 2 includes a front crossbeam 21, a rear crossbeam 22, and a generator mounting base 23 connected to the rear crossbeam 22 and the front crossbeam 21.

[0057] A pivot shaft 24 is provided on each side of the generator mounting base 23, and each pivot shaft 24 can be pivotally connected to the main longitudinal beam 1 on the corresponding side.

[0058] The two ends of the front crossbeam 21 and the rear crossbeam 22 are respectively connected to the main longitudinal beam 1 through locking elements 4.

[0059] The main longitudinal beam 1 is provided with arc-shaped adjustment holes 14 arranged concentrically with the pivot shaft 24 at the positions corresponding to the rear crossbeam 22 and the front crossbeam 21. The locking element 4 passes through the arc-shaped adjustment holes 14 and can slide along the arc-shaped adjustment holes 14 to adjust its position.

[0060] The adjustment drive mechanism 3 is connected between the main longitudinal beam 1 and the front crossbeam 21 / rear crossbeam 22. The adjustment drive mechanism 3 is used to drive the generator mounting bracket 2 to swing, so as to adjust the tilt angle of the generator mounting base 23.

[0061] The rear frame of the wind turbine generator set provided by the present invention mainly includes two main longitudinal beams 1, a generator mounting bracket 2, and at least one set of adjustment drive mechanism 3.

[0062] Two main longitudinal beams 1 extend front to back and are arranged in parallel. The generator mounting base 23 is pivotally mounted between the two main longitudinal beams 1, so the generator mounting bracket 2 can be adjusted up and down relative to the main longitudinal beams 1 to adjust the tilt angle of the generator mounting base 23.

[0063] The generator mounting bracket 2 includes a front crossbeam 21, a rear crossbeam 22, and a generator mounting base 23 connected between the front crossbeam 21 and the rear crossbeam 22.

[0064] The front crossbeam 21 and rear crossbeam 22 can be made of I-beams, which have high structural strength and provide good support for the generator mounting base 23. The front crossbeam 21 and rear crossbeam 22 extend horizontally and are arranged parallel to each other between the two main longitudinal beams 1. The rear crossbeam 22 is located approximately at the rear end of the main longitudinal beam 1, and the front crossbeam 21 is located approximately at the middle of the main longitudinal beam 1, leaving space on the front side for installing the drive train.

[0065] The generator mounting base 23 is installed on the front crossbeam 21 and the rear crossbeam 22. Specifically, the generator mounting base 23 is connected between the rear crossbeam 22 and the front crossbeam 21, or is located on the top surface of the rear crossbeam 22 and the front crossbeam 21. The top surface of the generator mounting base 23 is the generator mounting surface, which naturally has a forward and upward slope so that the generator mounted on the generator mounting surface is tilted forward and upward to match the front drive train. Specifically, the generator mounting surface is a mounting plane and is arranged at an angle, specifically with the front higher than the rear, so that the generator mounted on the generator mounting surface can be adapted to the front drive train. Each of the four corners of the generator mounting surface has a base plate with internal threaded holes. When installing the generator, the four corners of the generator rest on the four base plates respectively and are fixed by bolts.

[0066] The generator mounting base 23 is located on the left / right half of the front crossbeam 21 and the right / left half of the rear crossbeam 22, and is used to mount generator accessories, such as wiring harnesses. The front crossbeam 21 and the rear crossbeam 22 are connected by the generator mounting base 23 to form an integral structure. The generator mounting base 23 can be welded to the rear crossbeam 22 and the front crossbeam respectively.

[0067] A pivot shaft 24 is provided on each side of the generator mounting base 23, with the pivot shaft 24 approximately positioned between the front crossbeam 21 and the rear crossbeam 22. The two pivot shafts 24 are pivotally connected to the two main longitudinal beams 1, respectively. Specifically, the pivot shafts 24 can be connected to the main longitudinal beams 1 via bearings or slewing bearings, allowing the pivot shafts 24 to rotate relative to the main longitudinal beams 1. This adjusts the height of the front end of the generator mounting base 23, thereby adjusting the tilt angle of the generator mounted on the generator mounting surface to match different drive trains.

[0068] The left and right ends of the front crossbeam 21 and the rear crossbeam 22 are respectively connected to the two main longitudinal beams 1 via locking elements 4. The locking elements 4 can be a combination of multiple locking bolts.

[0069] To allow the front crossbeam 21 and rear crossbeam 22 to swing up and down relative to the main longitudinal beam 1 and to be locked, arc-shaped adjustment holes 14 are provided at the end areas of the two main longitudinal beams 1 corresponding to the front crossbeam 21 and rear crossbeam 22, respectively. Each arc-shaped adjustment hole 14 is arranged concentrically with the pivot shaft 24.

[0070] The arc-shaped adjustment hole 14 is used for the locking element 4 to pass through, adjust its position, and lock. Specifically, the locking bolt of the locking element 4 is connected to the ends of the front crossbeam 21 and the rear crossbeam 22. The locking bolt can pass through the arc-shaped adjustment hole 14. Before tightening the nut, the locking bolt can slide within the arc-shaped adjustment hole 14, thereby adjusting the position of the locking bolt within the arc-shaped adjustment hole 14. Consequently, the front crossbeam 21 and the rear crossbeam 22 can be adjusted up and down along the trajectory of the arc-shaped adjustment hole 14. After the generator mounting bracket 2 is adjusted to the correct position, the nut is tightened, and the front crossbeam 21 and the rear crossbeam 22 are locked in the designated position by the locking element 4.

[0071] The adjustment drive mechanism 3 is connected between the main longitudinal beam 1 and the front crossbeam 21 or the rear crossbeam 22, and is used to drive the generator mounting bracket 2 to swing and adjust. When the generator mounting bracket 2 swings and adjusts, the front crossbeam 21 and the rear crossbeam 22 can adjust their positions along the trajectory defined by the corresponding arc-shaped adjustment holes 14, which can adjust the slope of the generator mounting surface. This allows the slope of the generator mounting surface to be adjusted within a certain range, thereby adjusting the tilt angle of the generator mounted on the generator mounting surface and improving its universal compatibility with different drive chains.

[0072] The adjustment drive mechanism 3 can be a motor screw drive mechanism, a piston drive mechanism, etc. Compared with the method of the adjustment drive mechanism 3 directly driving the pivot shaft 24 to rotate, the adjustment drive mechanism 3 drives the front crossbeam 21 or the rear crossbeam 22 to swing with less effort. Even if a heavy generator is installed on the generator mounting base 23, the adjustment drive mechanism 3 can drive the generator mounting bracket 2 to drive the generator to adjust the angle as a whole.

[0073] Under normal conditions, the rear crossbeam 22 and the front crossbeam 21 are on the same horizontal plane. Since the generator mounting surface naturally has an inclination, it can be adapted to a certain transmission chain.

[0074] When adjusting the generator mounting base 23 and the generator's tilt angle in conjunction with other drive chains, loosen the locking elements 4 at the ends of the front crossbeam 21 and the rear crossbeam 22. Use the adjustment drive mechanism 3 to drive the front crossbeam 21 or the rear crossbeam 22 to swing up and down along the arc-shaped adjustment hole 14, thereby adjusting the tilt angle of the generator mounting base 23 and the generator. After adjustment, tighten the locking nuts. During adjustment, the bolts of the locking elements 4 move along the arc-shaped adjustment hole 14, serving to guide and prevent the front crossbeam 21 and the rear crossbeam 22 from disengaging from the main longitudinal beam 1.

[0075] When the user needs to place the generator on the generator mounting surface, the front end of the generator mounting base 23 can be lowered first to make the generator mounting surface roughly horizontal so that the generator can be placed on the generator mounting surface for fixation, which can avoid the risk of the generator slipping when placed on an inclined generator mounting surface.

[0076] In one embodiment of the present invention, the rear frame of the wind turbine generator set includes two sets of adjustment drive mechanisms 3, and each main longitudinal beam 1 is equipped with an adjustment drive mechanism 3 between the front crossbeam 21 / rear crossbeam 22.

[0077] When the generator mounting bracket 2 is oscillating, the two sets of adjustment drive mechanisms 3 operate synchronously, which improves the stability of the oscillation adjustment of the generator mounting bracket 2.

[0078] In one embodiment of the present invention, as Figures 1-5 As shown, the front crossbeam 21 and the rear crossbeam 22 are respectively provided with crossbeam end plates 25 at both ends. Each crossbeam end plate 25 is provided with an arc-shaped mounting hole 26 that matches the arc-shaped adjustment hole 14. The locking element 4 can slide and adjust along the arc-shaped mounting hole 26.

[0079] The locking element 4 passes through the arc-shaped adjustment hole 14 and the arc-shaped assembly hole 26 in sequence, and locks the crossbeam end plate 25 to the main longitudinal beam 1.

[0080] In this embodiment, the left and right ends of the front crossbeam 21 and the rear crossbeam 22 are respectively provided with crossbeam end plates 25, which increases the mating area with the main longitudinal beam 1, so as to arrange more locking elements 4. The crossbeam end plates 25 can be welded to the ends of the front crossbeam 21 / rear crossbeam 22.

[0081] Correspondingly, each crossbeam end plate 25 is provided with an arc-shaped mounting hole 26, which matches the contour of the arc-shaped adjustment hole 14. The locking element 4 can pass through the arc-shaped mounting hole 26 and the arc-shaped adjustment hole 14, and can slide and adjust along the arc-shaped mounting hole 26 and the arc-shaped adjustment hole 14.

[0082] Specifically, the head of the bolt of the locking element 4 is located inside the arc-shaped mounting hole 26, the body of the bolt passes through the arc-shaped mounting hole 26 and the arc-shaped adjusting hole 14, and is then locked by a nut.

[0083] In one embodiment of the present invention, as Figures 1-5 As shown, the main longitudinal beam 1 is provided with two arc-shaped adjustment holes 14 arranged at intervals at the ends of the rear crossbeam 22 and the front crossbeam 21, respectively.

[0084] Two arc-shaped assembly holes 26 are provided on the end plate 25 of the crossbeam.

[0085] The ends of the rear crossbeam 22 and the front crossbeam 21 are connected to the main longitudinal beam 1 by two sets of locking elements 4, and each set of locking elements 4 passes through a set of arc-shaped adjustment holes 14 and arc-shaped assembly holes 26 in sequence.

[0086] In this invention, the left and right ends of the front crossbeam 21 and the rear crossbeam 22 are respectively connected to the main longitudinal beam 1 through two sets of locking elements 4 arranged in the front and rear, which further improves the stability of the connection between the front crossbeam 21, the rear crossbeam 22 and the main longitudinal beam 1.

[0087] Specifically, two arc-shaped adjustment holes 14 are provided on the main longitudinal beam 1 at the positions corresponding to the ends of the front crossbeam 21 and the rear crossbeam 22, respectively. The two arc-shaped adjustment holes 14 are arranged at intervals, and the radius of curvature of the arc-shaped adjustment hole 14 closer to the pivot axis 24 is smaller than the radius of curvature of the arc-shaped adjustment hole 14 farther away from the pivot axis 24.

[0088] Accordingly, each crossbeam end plate 25 is provided with two arc-shaped assembly holes 26, and the two arc-shaped assembly holes 26 are adapted to the contours of the two arc-shaped adjustment holes 14 in the corresponding area.

[0089] During assembly, each arc-shaped mounting hole 26 and the corresponding arc-shaped adjustment hole 14 are provided with a set of locking elements 4. Each set of locking elements 4 includes multiple locking elements 4 to fasten the ends of the front crossbeam 21 and the rear crossbeam 22 to the inner side of the main longitudinal beam 1.

[0090] During the swing adjustment, the two sets of locking elements 4 at the ends of the front crossbeam 21 and the rear crossbeam 22 slide along the corresponding two sets of arc-shaped mounting holes 26 and arc-shaped adjustment holes 14, which further improves the stability of the ends of the front crossbeam 21 and the rear crossbeam 22 during the swing adjustment.

[0091] In one embodiment of the present invention, as Figure 1 and Figures 4-5 As shown, the front crossbeam 21 has forward-extending crossbeam extension arms 27 at both ends. The adjustment drive mechanism 3 is connected between the main longitudinal beam 1 and the crossbeam extension arms 27, which increases the lever arm between the adjustment drive mechanism 3 and the pivot shaft 24. This helps to reduce the load on the adjustment drive mechanism 3 when it is driving, and also facilitates the adjustment drive mechanism 3 to achieve the connection between the adjustment drive mechanism 3 and the front crossbeam 21.

[0092] In one embodiment of the present invention, as Figure 1 and Figures 4-7 As shown, the adjustment drive mechanism 3 includes a drive motor 31 installed on the inner side of the main longitudinal beam 1 and capable of swinging back and forth, and a transmission screw 32 connected to the drive motor 31 and extending vertically.

[0093] The crossbeam extension arm 27 is provided with a connecting arm 28 extending toward the main longitudinal beam 1, and the connecting arm 28 is provided with an internal threaded hole 29.

[0094] The drive screw 32 passes through the internal threaded hole 29 and is threadedly connected.

[0095] When the drive motor 31 drives the transmission screw 32 to rotate, the front crossbeam 21 can swing up and down relative to the pivot shaft 24. The drive motor 31 can adaptively swing back and forth to keep the transmission screw 32 and the internal threaded hole 29 concentrically arranged.

[0096] In this embodiment, the adjustment drive mechanism 3 adopts a motor screw mechanism, which includes a drive motor 31 and a transmission screw 32. The drive motor 31 is pivotally mounted on the inner side of the main longitudinal beam 1, and it can swing in the front-rear direction to adapt to the up-and-down swing of the front crossbeam 21. The drive motor 31 can be mounted on the inner side of the main longitudinal beam 1 using a hinge, shaft, or the like. The transmission screw 32 is arranged vertically, and its lower end is connected to the drive motor 31, which drives it to rotate in both directions.

[0097] A connecting arm 28 is provided on the side of the crossbeam extension arm 27 facing the main longitudinal beam 1, extending toward the main longitudinal beam 1. The end of the connecting arm 28 is provided with an internal threaded hole 29.

[0098] The upper end of the transmission screw 32 passes through the internal threaded hole 29, and the two are threadedly connected. A cover 35 is connected to the upper end of the transmission screw 32 to prevent the transmission screw 32 from disengaging from the connecting arm 28.

[0099] When the drive motor 31 drives the transmission screw 32 to rotate, the transmission screw 32 rotates, and under the action of the thread, it drives the connecting arm 28 to move up or down, thereby causing the generator mounting bracket 2 to swing up and down relative to the pivot center of the pivot shaft 24. When the connecting arm 28 drives the front crossbeam 21 to swing up and down, it will react through the transmission screw 32 to drive the motor 31. The drive motor 31 will swing back and forth adaptively to adapt to the relative position between the connecting arm 28 and the drive motor 31, so that the transmission screw 32 and the internal threaded hole 29 remain concentrically arranged and will not affect the assembly and transmission relationship between the transmission screw 32 and the internal threaded hole 29.

[0100] Assume that in the initial state, the transmission screw 32 extends vertically upward and the connecting arm 28 is directly above the drive motor 31.

[0101] Combination Figure 1 and Figure 6 As shown, when the transmission screw 32 is driven to rotate in the forward direction, the connecting arm 28 drives the front crossbeam 21 to swing upward. The distance between the connecting arm 28 and the drive motor 31 increases, and the connecting arm 28 moves backward relative to the drive motor 31. Therefore, the drive motor 31 will adaptively swing backward.

[0102] Combination Figure 1 and Figure 6 As shown, when the transmission screw 32 is driven to rotate in the opposite direction, the connecting arm 28 drives the front crossbeam 21 to swing downward. The distance between the connecting arm 28 and the drive motor 31 decreases, and the connecting arm 28 moves forward relative to the drive motor 31. Therefore, the drive motor 31 will adaptively swing forward.

[0103] In one embodiment of the present invention, as Figures 6-7As shown, the drive motor 31 is pivotally connected to the main longitudinal beam 1 via a connecting shaft 34. The connecting shaft 34 is arranged parallel to the front crossbeam 21 to ensure that the drive motor 31 can only swing back and forth.

[0104] In one embodiment of the present invention, as Figure 1 and Figures 6-7 As shown, the inner side of the main longitudinal beam 1 is provided with a connecting seat 15, and the connecting seat 15 is provided with a receiving groove 16. The cross section of the receiving groove 16 along the front-back direction is semi-circular.

[0105] The drive motor 31 has a motor base 33 at its bottom, and the cross-section of the motor base 33 along the front-to-back direction is also semi-circular. The connecting shaft 34 is connected to the motor base 33.

[0106] The motor base 33 is movably mounted in the receiving groove 16, and the connecting shaft 34 is pivotally connected to the groove wall of the receiving groove 16.

[0107] In this embodiment, in order to improve the assembly and swing stability of the drive motor 31, a connecting seat 15 with a receiving groove 16 is provided on the inner side of the main longitudinal beam 1. The cross section of the receiving groove 16 along the front-back direction is semi-circular, and the overall shape of the receiving groove 16 is semi-cylindrical.

[0108] Correspondingly, a semi-cylindrical motor base 33 is provided at the bottom of the drive motor 31, and the cross-section of the motor base 33 along the front-rear direction is also semi-circular. A connecting shaft 34 is connected to the motor base 33, preferably positioned in the middle of the motor base 33. The motor base 33 is movably mounted within the receiving groove 16, and the connecting shaft 34 is pivotally connected to the groove wall of the receiving groove 16. The motor base 33 can swing back and forth within the receiving groove 16, and the assembly relationship between the two is stable. The connecting shaft 34 is fixedly connected to the motor base 33 and pivotally connected to the groove wall of the receiving groove 16. The motor base 33 and the connecting shaft 34 move as a unit.

[0109] In one embodiment of the present invention, as Figures 8-9 As shown, the adjustment drive mechanism 3 includes a drive motor 31 installed on the inner side of the main longitudinal beam 1 and capable of sliding back and forth, and a rotating rod 36 connected to the drive motor 31 and extending vertically. The upper end of the rotating rod 36 is hinged to the transmission screw 32 through a hinge shaft 37.

[0110] The crossbeam extension arm 27 is provided with a connecting arm 28 extending toward the main longitudinal beam 1, and the connecting arm 28 is provided with an internal threaded hole 29.

[0111] The drive screw 32 passes through the internal threaded hole 29 and is threadedly connected.

[0112] In this embodiment, the adjustment drive mechanism 3 adopts a motor screw mechanism, which includes a drive motor 31, a rotating rod 36 and a transmission screw 32.

[0113] The drive motor 31 is slidably mounted on the inner side of the main longitudinal beam 1, and can slide along the front-rear direction to accommodate the up-and-down swing of the front crossbeam 21. The drive motor 31 can be mounted on the inner side of the main longitudinal beam 1 using a guide rail or the like.

[0114] The rotating rod 36 is arranged vertically, and its lower end is connected to the drive motor 31, which drives it to rotate in both directions. The lower end of the transmission screw 32 is hinged to the upper end of the rotating rod 36 through the hinge shaft 37, and is driven to rotate in both directions by the rotating rod 36.

[0115] A connecting arm 28 is provided on the side of the crossbeam extension arm 27 facing the main longitudinal beam 1, extending toward the main longitudinal beam 1. The end of the connecting arm 28 is provided with an internal threaded hole 29. The transmission screw 32 passes through the internal threaded hole 29, and the two are threadedly connected.

[0116] When the drive motor 31 drives the rotating rod 36 to rotate, and the rotating rod 36 drives the transmission screw 32 to rotate, the connecting arm 28 is driven to move up or down under the action of the thread, thereby causing the generator mounting bracket 2 to swing up and down relative to the pivot center of the pivot shaft 24. When the connecting arm 28 drives the front crossbeam 21 to swing up and down, it will cause the transmission screw 32 to swing to a certain extent, so that the transmission screw 32 and the internal thread hole 29 remain concentric. During this process, the rotating rod 36 remains vertical and reacts to the drive motor 31 to slide back and forth adaptively, which helps to adjust the swing angle of the transmission screw 32, thereby satisfying the swing amplitude of the front crossbeam 21.

[0117] Assume that in the initial state, the transmission screw 32 extends vertically upward and the connecting arm 28 is directly above the drive motor 31.

[0118] Combination Figure 1 and Figures 8-10 As shown, when the transmission screw 32 is driven to rotate in the forward direction, the connecting arm 28 causes the front crossbeam 21 to swing upward. This increases the distance between the connecting arm 28 and the drive motor 31, and the arm moves backward relative to the drive motor 31, causing the transmission screw 32 to swing backward at a certain angle. The transmission screw 32, through the rotating rod 36, reacts to drive the motor 31, causing the motor 31 to adaptively slide forward a certain distance. This helps increase the backward tilt angle of the transmission screw 32 to satisfy the upward swing amplitude of the front crossbeam 21.

[0119] Combination Figure 1 and Figures 8-10As shown, when the transmission screw 32 is driven to rotate in the opposite direction, the connecting arm 28 causes the front crossbeam 21 to swing downwards. This reduces the distance between the connecting arm 28 and the drive motor 31, and the connecting arm 28 moves forward relative to the drive motor 31, causing the transmission screw 32 to swing forward at a certain angle. The transmission screw 32, through the rotating rod 36, reacts to drive the motor 31, causing the motor 31 to adaptively slide backwards a certain distance. This helps increase the forward tilt angle of the transmission screw 32 to satisfy the downward swing amplitude of the front crossbeam 21.

[0120] In one embodiment of the present invention, as Figure 1 and Figures 8-10 As shown, a connecting seat 15 is provided on the inner side of the main longitudinal beam 1. The connecting seat 15 has a guide groove 17 extending forward and backward, and a guide rail 18 extending forward and backward is provided in the guide groove 17. The drive motor 31 is slidably mounted on the guide rail 18, which facilitates the stable forward and backward sliding of the drive motor 31 in the guide groove 17.

[0121] In one embodiment of the present invention, as Figures 1-3 and Figures 6-7 As shown, the main longitudinal beam 1 includes a longitudinal beam bottom plate 11, a longitudinal beam main plate 12, and a longitudinal beam top plate 13 connected in sequence in an I-shape.

[0122] Arc-shaped adjustment hole 14 is provided on the longitudinal beam main plate 12, and the two ends of the front crossbeam 21 and the rear crossbeam 22 are respectively connected to the longitudinal beam main plate 12 through locking element 4.

[0123] The pivot shaft 24 is pivotally connected to the longitudinal beam main plate 12.

[0124] The drive motor 31 is located inside the main plate 12 of the longitudinal beam and between the bottom plate 11 and the top plate 13 of the longitudinal beam.

[0125] In this embodiment, the drive motor 31 is arranged between the bottom plate 11 and the top plate 13 of the longitudinal beam. It does not protrude from the inner side of the main longitudinal beam 1. The bottom plate 11 of the longitudinal beam protects the drive motor 31 and can prevent debris falling from above from hitting the drive motor 31.

[0126] In one embodiment of the present invention, as Figures 4-5 As shown, the bottom surface of the crossbeam extension arm 27 is the extension arm ramp 271. Along the direction from back to front, the extension arm ramp 271 gradually extends upward to avoid the drive motor 31 below, preventing the downward swinging crossbeam extension arm 27 from hitting the drive motor 31. The slope of the extension arm ramp 271 can be set as needed, just to avoid hitting the drive motor 31 as much as possible.

[0127] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0128] The above are merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rear frame for a wind turbine generator set, characterized in that, It includes two main longitudinal beams (1) that extend forward and backward and are arranged in parallel, a generator mounting bracket (2) installed between the two main longitudinal beams (1) and capable of swinging up and down, and an adjustment drive mechanism (3) connected between the main longitudinal beams (1) and the generator mounting bracket (2); The generator mounting bracket (2) includes a front crossbeam (21), a rear crossbeam (22), and a generator mounting base (23) connected to the rear crossbeam (22) and the front crossbeam (21); The generator mounting base (23) is provided with a pivot shaft (24) on each side, and each pivot shaft (24) is pivotally connected to the main longitudinal beam (1) on the corresponding side; The two ends of the front crossbeam (21) and the rear crossbeam (22) are respectively connected to the main longitudinal beam (1) by locking elements (4); The main longitudinal beam (1) is provided with arc-shaped adjustment holes (14) arranged concentrically with the pivot shaft (24) at the positions corresponding to the rear cross beam (22) and the front cross beam (21). The locking element (4) passes through the arc-shaped adjustment hole (14) and can slide along the arc-shaped adjustment hole (14) to adjust its position. The adjustment drive mechanism (3) is connected between the main longitudinal beam (1) and the front crossbeam (21) / the rear crossbeam (22). The adjustment drive mechanism (3) is used to drive the generator mounting bracket (2) to swing so as to adjust the tilt angle of the generator mounting base (23).

2. The rear frame of the wind turbine generator set according to claim 1, characterized in that, The rear crossbeam (22) and the front crossbeam (21) are respectively provided with crossbeam end plates (25), and each crossbeam end plate (25) is provided with an arc-shaped assembly hole (26) that matches the arc-shaped adjustment hole (14). The locking element (4) can slide and adjust along the arc-shaped assembly hole (26). The locking element (4) passes through the arc-shaped adjustment hole (14) and the arc-shaped assembly hole (26) in sequence, and locks the crossbeam end plate (25) to the main longitudinal beam (1).

3. The rear frame of the wind turbine generator set according to claim 2, characterized in that, The main longitudinal beam (1) is provided with two arc-shaped adjustment holes (14) arranged at intervals in front and behind, corresponding to the ends of the rear crossbeam (22) and the front crossbeam (21); The crossbeam end plate (25) is provided with two arc-shaped assembly holes (26); The ends of the rear crossbeam (22) and the front crossbeam (21) are respectively connected to the main longitudinal beam (1) through two sets of locking elements (4), and each set of locking elements (4) passes through a set of arc-shaped adjustment holes (14) and arc-shaped assembly holes (26) in sequence.

4. The rear frame of the wind turbine generator set according to any one of claims 1-3, characterized in that, The front crossbeam (21) is provided with forward-extending crossbeam extension arms (27) at both ends; The adjustment drive mechanism (3) is connected between the main longitudinal beam (1) and the crossbeam extension arm (27).

5. The rear frame of the wind turbine generator set according to claim 4, characterized in that, The adjustment drive mechanism (3) includes a drive motor (31) installed on the inner side of the main longitudinal beam (1) and capable of swinging back and forth, and a transmission screw (32) connected to the drive motor (31) and extending vertically. The beam extension arm (27) is provided with a connecting arm (28) extending toward the main longitudinal beam (1), and the connecting arm (28) is provided with an internal threaded hole (29); The transmission screw (32) passes through the internal threaded hole (29) and is threadedly connected; When the drive motor (31) drives the transmission screw (32) to rotate, the front crossbeam (21) can swing up and down relative to the pivot shaft (24), and the drive motor (31) can swing back and forth adaptively to keep the transmission screw (32) and the internal thread hole (29) concentrically arranged.

6. The rear frame of the wind turbine generator set according to claim 5, characterized in that, The drive motor (31) is pivotally connected to the main longitudinal beam (1) via a connecting shaft (34), and the connecting shaft (34) is arranged parallel to the front crossbeam (21).

7. The rear frame of the wind turbine generator set according to claim 6, characterized in that, The main longitudinal beam (1) has a connecting seat (15) on its inner side. The connecting seat (15) has a receiving groove (16). The receiving groove (16) has a semi-circular cross section along the front-back direction. The bottom of the drive motor (31) is provided with a motor base (33), and the cross section of the motor base (33) along the front-back direction is also semi-circular. The connecting shaft (34) is connected to the motor base (33). The motor base (33) is movably mounted in the receiving groove (16), and the connecting shaft (34) is pivotally connected to the groove wall of the receiving groove (16).

8. The rear frame of the wind turbine generator set according to claim 4, characterized in that, The adjustment drive mechanism (3) includes a drive motor (31) installed on the inner side of the main longitudinal beam (1) and capable of sliding back and forth, a rotating rod (36) connected to the drive motor (31) and extending vertically, and a transmission screw (32) hinged to the upper end of the rotating rod (36); the crossbeam extension arm (27) is provided with a connecting arm (28) extending toward the main longitudinal beam (1), the connecting arm (28) is provided with an internal threaded hole (29), and the transmission screw (32) passes through the internal threaded hole (29) and is threadedly connected.

9. The rear frame of the wind turbine generator set according to any one of claims 1-3, characterized in that, The main longitudinal beam (1) includes a bottom plate (11), a main plate (12), and a top plate (13) connected in sequence in an I-shape. The arc-shaped adjustment hole (14) is provided on the longitudinal beam main board (12), and the two ends of the front crossbeam (21) and the rear crossbeam (22) are respectively connected to the longitudinal beam main board (12) through the locking element (4); The pivot shaft (24) is pivotally connected to the longitudinal beam main plate (12); The drive motor (31) is located inside the main plate (12) of the longitudinal beam and between the bottom plate (11) and the top plate (13) of the longitudinal beam.

10. The rear frame of the wind turbine generator set according to claim 9, characterized in that, The bottom surface of the beam extension arm (27) is the extension arm ramp (271), which gradually extends upward in the direction from back to front to avoid the drive motor (31) below.

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