A wind turbine flange bolt stepping type automatic tensioning device

Abstract

The present application relates to bolt tensioning technology technical field, specifically disclose a kind of wind turbine flange bolt step type automatic tensioning device, including the bolt pretensioning mechanism being cooperated with the nut on flange seat, the bolt pretensioning mechanism includes first tensioning module and second tensioning module, the first tensioning module and the second tensioning module are connected with adjusting module, the adjusting module cooperates the first tensioning module and second tensioning module and carries out step type automatic tensioning to the nut on the flange seat;The bolt pretensioning mechanism reached step type automatic completion bolt tensioning pretension effect is achieved by being set, without manual manual utilization tool knob nut, reduce the security risk of human operation, improve the connection efficiency of flange bolt, degree of automation is high, it is easy to operate, work reliably, greatly reduce bolt pretension workload.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt tensioning, in particular to a step-by-step automatic tensioning device for flange bolts of a wind turbine. BACKGROUND

[0002] In the installation of a wind turbine tower, a large number of flange bolts need to be pre-tightened to a specified load to meet design, use and safety requirements. Currently, such work is mainly completed by manual operation, which is inefficient and risky.

[0003] A Chinese patent document CNACN116745070A discloses an improved bolt tensioner, which includes a load cell having at least one piston and a piston retraction mechanism. The bolt tensioner has a first fluid port and a second fluid port, each of which is in fluid communication with the at least one piston and is used to receive pressurized fluid to apply tension and return forces to the at least one piston, respectively. The piston can be operated in both tension and retraction directions under the action of fluid pressure; however, this technical content does not solve the technical problem of continuously tensioning the bolts in a step-by-step manner during the installation of a wind turbine tower, and manual auxiliary equipment is still used to tension multiple bolts.

[0004] Therefore, we provide a step-by-step automatic tensioning device for flange bolts of a wind turbine to solve the above problems. SUMMARY

[0005] (I) Technical problem to be solved

[0006] The problem to be solved by the present application is to provide a step-by-step automatic tensioning device for flange bolts of a wind turbine to overcome the defects in the prior art.

[0007] (II) Technical solution

[0008] To solve the technical problem, the present application provides a step-by-step automatic tensioning device for flange bolts of a wind turbine, which includes a bolt pre-tightening mechanism cooperating with a nut on a flange seat. The bolt pre-tightening mechanism includes a first tensioning module and a second tensioning module, and an adjusting module is connected between the first tensioning module and the second tensioning module. The adjusting module cooperates with the first tensioning module and the second tensioning module to step-by-step automatically tension the nut on the flange seat.

[0009] The adjusting module includes a first swing arm and a second swing arm, and the first swing arm and the second swing arm are hinged through a hinge shaft. A rotary servo motor is connected to the hinge shaft.

[0010] The first tensioning module and the second tensioning module include an inner spline screw, and two inner spline screws are respectively threadedly connected to the first swing arm and the second swing arm. Two inner spline screws are respectively connected to a stretching servo motor.

[0011] The inner spline screw is connected with a tensioning oil cylinder, and the tensioning oil cylinder is matched with the nut.

[0012] Further, a stretching head is arranged in the tensioning oil cylinder, and a matching head is matched between the stretching head and the tensioning oil cylinder.

[0013] Further, the stretching head can be clamped with the bolt on the flange seat.

[0014] Further, the lower end of the tensioning oil cylinder is connected with a connecting seat, and the connecting seat is rotationally connected with a tensioning device located below the tensioning oil cylinder.

[0015] Further, the connecting seat is rotationally connected with a tensioning wheel, a synchronous belt motor is arranged on the connecting seat, and the output wheel of the synchronous belt motor is connected with a transmission belt together with the tensioning device and the tensioning wheel.

[0016] Further, the axial line of the tensioning device is located on the same vertical line as the axial line of the inner spline screw.

[0017] Further, the first swing arm and the second swing arm are both provided with an electromagnetic opening and closing nut matched with the inner spline screw.

[0018] Further, the first tensioning module and the second tensioning module cooperate with the adjusting module to stepwise tension the nut on the flange seat.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the wind turbine flange bolt stepwise automatic tensioning device provided by the application has the following beneficial effects:

[0021] By arranging the bolt pre-tightening mechanism matched with the nut on the flange seat, the bolt pre-tightening mechanism comprises a first tensioning module and a second tensioning module, the adjusting module is connected between the first tensioning module and the second tensioning module, and the adjusting module cooperates with the first tensioning module and the second tensioning module to stepwise automatically tension the nut on the flange seat.

[0022] The bolt tensioning process is automated via a step-by-step mechanism: the nut engages when it is closed, and disengages when it is open; the oil cylinder feeds oil to tension and discharges oil to unload; the synchronous belt motor tightens the nut to tighten and stops when it is not tightened; the tension servo motors on the first and second tensioning modules, as well as the rotary servo motor on the adjustment module, rotate clockwise to clockwise, counterclockwise to counterclockwise, and stop when not rotating; this achieves the step-by-step automatic tensioning of the bolts, eliminating the need for manual operation using tools and knobs, reducing the safety risks of human operation, improving the connection efficiency of flange bolts, and offering high automation, ease of operation, reliable performance, and significantly reducing the workload of bolt pre-tightening. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first perspective view of a step-type automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0025] Figure 2 This is a second perspective view of an automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0026] Figure 3 This is a cross-sectional view of a step-type automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0027] Figure 4 This is a schematic diagram of the bolt pre-tightening mechanism of a step-type automatic tensioning device for wind turbine flange bolts according to the present invention;

[0028] Figure 5 This is a schematic diagram from another perspective of the bolt pre-tightening mechanism of the automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0029] Figure 6 This is a bottom view of the bolt pre-tightening mechanism of a step-type automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0030] Figure 7 This is a cross-sectional view of the bolt pre-tightening mechanism of a step-type automatic tensioning device for flange bolts of a wind turbine according to the present invention;

[0031] Figure 8 This is a schematic diagram of the first working state of the automatic tensioning device for flange bolts of a wind turbine according to the present invention.

[0032] Figure 9It is a second working state schematic view of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present application;

[0033] Figure 10 It is a working step sequence schematic view of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present application;

[0034] Corresponding component names of various reference numerals in the figure are as follows: 1, flange seat; 2, bolt; 3, nut; 4, tensioning oil cylinder; 5, matching head; 6, tensioner; 7, stretching head; 8, inner spline screw rod; 9, electromagnetic opening and closing nut; 10, connecting seat; 1011, tensioning wheel; 1012, transmission belt; 11, synchronous belt motor; 13, first swing arm; 14, second swing arm; 15, rotary servo motor; 16, stretching servo motor. DETAILED DESCRIPTION

[0035] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The embodiments of the present application will be described below in detail through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0037] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that two or more of these aspects can be combined in various ways. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, such an apparatus can be implemented or such a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects set forth herein.

[0038] It is also need to be explained that the figures provided in the following embodiments only illustrate the basic ideas of the present application in a schematic way, and only the components related to the present application are shown in the figures, not the components number, shape and size when actually implemented, the actual implementation of each component type, number and proportion can be a random change, and the component layout type can be more complex.

[0039] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will understand that the examples can be practiced without these specific details.

[0040] The technical solutions provided by the embodiments of the present application are described below with reference to the drawings.

[0041] Referring to Figures 1 to 10 The present application provides a wind turbine flange bolt stepping type automatic tensioning device, comprising a bolt pre-tightening mechanism matched with a nut 3 on a flange seat 1, the bolt pre-tightening mechanism comprising a first tensioning module A and a second tensioning module B, and an adjusting module C connected between the first tensioning module A and the second tensioning module B, the adjusting module C cooperating with the first tensioning module A and the second tensioning module B to stepwise automatically tension the nut 3 on the flange seat 1.

[0042] The adjusting module C comprises a first swing arm 13 and a second swing arm 14, the first swing arm 13 and the second swing arm 14 are hinged through a hinge shaft, and the hinge shaft is connected with a rotary servo motor 15.

[0043] The first tensioning module A and the second tensioning module B comprise an inner spline screw rod 8, the two inner spline screw rods 8 are respectively threadedly connected with the first swing arm 13 and the second swing arm 14, and the two inner spline screw rods 8 are respectively connected with a stretching servo motor 16.

[0044] The inner spline screw rod 8 is connected with a tensioning oil cylinder 4, and the tensioning oil cylinder 4 is matched with the nut 3.

[0045] Referring to Figures 2 to 9 The tensioning oil cylinder 4 is provided with a stretching head 7, a matching head 5 is matched between the stretching head 7 and the tensioning oil cylinder 4, the stretching head 7 can be clamped and matched with the bolt on the flange seat 1, the lower end of the tensioning oil cylinder 4 is connected with a connecting seat 10, the connecting seat 10 is rotationally connected with a tensioning device 6 located below the tensioning oil cylinder 4, the connecting seat 10 is rotationally connected with a tensioning wheel 1011, the connecting seat 10 is provided with a synchronous belt motor 11, and the output wheel of the synchronous belt motor 11, the tensioning device 6 and the tensioning wheel 1011 are connected with a transmission belt 1012.

[0046] Referring to Figures 3 to 10, the axial line of the tensioner 6 and the axial line of the internal spline screw rod 8 are on the same vertical line, the electromagnetic opening and closing nut 9 is arranged on the first swing arm 13 and the second swing arm 14 and matched with the internal spline screw rod 8, the first tensioning module A and the second tensioning module B cooperate with the adjusting module C to step the nut 3 on the flange seat 1 to be tensioned.

[0047] The wind turbine flange bolt step-by-step automatic tensioning device provided in the embodiment has the advantages that:

[0048] The description is accompanied by Figure 8 、 9 , the numbers 1-6 in 10 correspond to the plurality of nuts 3 on the flange seat 1, and each number corresponds to one nut 3;

[0049] The first tensioning module A and the second tensioning module B are completely the same, the first tensioning module A tensioning double-numbered bolts 2, and the second tensioning module B tensioning single-numbered bolts 2. The first tensioning module A and the second tensioning module B each include: the electromagnetic opening and closing nut 9, the internal spline screw rod 8, the tensioner 6, the stretching head 7, the tensioning oil cylinder 4, the synchronous belt motor 11, etc. The adjusting module C includes the first swing arm 13 and the second swing arm 14 and the rotary servo motor 15.

[0050] When the tensioning oil cylinder 4 on the first swing arm 13 and the second swing arm 14 clamps the corresponding bolt 2 of the ① nut 3 and the ② nut 3, the synchronous belt motor 11 on the first swing arm 13 and the second swing arm 14 drives the tensioning wheel 1011 to rotate through the transmission belt 1012, so that the ① nut 3 and the ② nut 3 are tensioned on the flange seat 1. When the ① nut 3 and the ② nut 3 complete the tensioning operation; the tensioning oil cylinder 4 on the second swing arm 14 releases the clamping operation on the ② nut 3 (the tensioning oil cylinder 4 on the first swing arm 13 keeps clamping the ① bolt 2), the output shaft of the stretching servo motor 16 on the second swing arm 14 drives the internal spline screw rod 8 to rotate, so that the internal spline screw rod 8 cooperates with the internal threaded sleeve of the second swing arm 14 to ascend, so that the tensioning oil cylinder 4 on the second swing arm 14 is separated from the ② nut 3 and the ② bolt 2. The rotary servo motor 15 operates, so that the tensioning oil cylinder 4 on the second swing arm 14 moves to the position above the corresponding ③ nut 3, and then the stretching servo motor 16 on the second swing arm 14 reverses to operate, so that the tensioning oil cylinder 4 and the tensioner 6 correspond to the ③ nut to perform the ③ nut tensioning work. Repeat the above steps, taking the ① bolt 2 clamped by the first swing arm 13 as the base point, and the tensioner 6 on the second swing arm 14 steps the ②-⑥ nuts 3 to be tensioned.

[0051] The working steps of the device are as follows Figure 10The sequence of steps is shown: the electromagnetic opening and closing nut 9 is engaged as "close", and vice versa as "open"; the tensioning oil cylinder 4 is "tensioned" when oil is fed, and "unloaded" when oil is discharged; the synchronous belt motor 11 is "tightening" when tightening the nut 3, and "stopping" when not tightening the nut 3; the stretching servo motor 16 on the first tensioning module A and the second tensioning module B, and the rotating servo motor 15 on the adjusting module C are "clockwise" when rotating clockwise, "counterclockwise" when rotating counterclockwise, and "stopping" when not rotating;

[0052] The tensioning mechanism steps up the tensioning operation of the nut 3 on the flange seat 1 through the first tensioning module A and the second tensioning module B cooperating with the adjusting module C, achieving the effect of automatically completing the tensioning of the bolt in steps, without manual operation with tools, reducing the safety risk of human operation, improving the connection efficiency of the flange bolt 2, and having high automation, simple operation, reliable work, and greatly reducing the workload of bolt tensioning.

[0053] In the present specification, the same and similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wind turbine generator flange bolt step-by-step automatic tensioning device, comprising a bolt pre-tightening mechanism matched with a nut (3) on a flange base (1), characterized in that: The bolt pre-tightening mechanism comprises a first tensioning module (A) and a second tensioning module (B), an adjusting module (C) is connected between the first tensioning module (A) and the second tensioning module (B), and the adjusting module (C) cooperates with the first tensioning module (A) and the second tensioning module (B) to stepwise automatically tension the nut (3) on the flange base (1). The adjusting module (C) comprises a first swing arm (13) and a second swing arm (14), the first swing arm (13) and the second swing arm (14) are hinged through a hinge shaft, and the hinge shaft is connected with a rotary servo motor (15). The first tensioning module (A) and the second tensioning module (B) comprise inner spline screws (8), the two inner spline screws (8) are respectively threadedly connected with the first swing arm (13) and the second swing arm (14), and the two inner spline screws (8) are respectively connected with stretching servo motors (16). The inner spline screws (8) are connected with tensioning oil cylinders (4), and the tensioning oil cylinders (4) cooperate with the nuts (3).

2. The wind turbine generator flange bolt stepping type automatic tensioning device according to claim 1, characterized in that: The tensioning oil cylinders (4) are provided with stretching heads (7), and the stretching heads (7) cooperate with matching heads (5) between the tensioning oil cylinders (4).

3. The wind turbine generator flange bolt step-by-step automatic tensioning device according to claim 2, characterized in that: The stretching heads (7) can be clamped and cooperated with the bolts on the flange base (1).

4. The wind turbine generator flange bolt stepping type automatic tensioning device according to claim 1, characterized in that: Lower ends of the tensioning oil cylinders (4) are connected with connecting seats (10), the connecting seats (10) are rotationally connected with tensioning devices (6) located below the tensioning oil cylinders (4).

5. The wind turbine generator flange bolt step-by-step automatic tensioning device of claim 4, wherein: The connecting seats (10) are rotationally connected with tensioning wheels (1011), the connecting seats (10) are provided with synchronous belt motors (11), output wheels of the synchronous belt motors (11) are connected with the tensioning devices (6) and the tensioning wheels (1011) through transmission belts (1012).

6. The wind turbine generator flange bolting step-by-step automatic tensioning device according to claim 4, characterized in that: An axial line of the tensioning device (6) is located on the same vertical line as an axial line of the inner spline screw (8).

7. The wind turbine generator flange bolting step-by-step automatic tensioning device according to claim 1, characterized in that: The first swing arm (13) and the second swing arm (14) are both provided with electromagnetic opening and closing nuts (9) matched with the inner spline screws (8).

8. The wind turbine generator flange bolting step-by-step automatic tensioning device according to claim 1, characterized in that: The first tensioning module (A) and the second tensioning module (B) cooperate with the adjusting module (C) to stepwise tension the nut (3) on the flange base (1).

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