Stepping type automatic tensioning device for flange bolt of wind turbine generator

Abstract

The invention relates to the technical field of bolt tensioning technologies, and particularly discloses a wind turbine generator flange bolt stepping type automatic tensioning device which comprises a bolt pre-tightening mechanism matched with a nut on a flange seat, and the bolt pre-tightening mechanism comprises a first tensioning module and a second tensioning module. An adjusting module is connected between the first tensioning module and the second tensioning module; the adjusting module is matched with the first tensioning module and the second tensioning module to automatically tension a nut on the flange seat in a stepping manner; by means of the bolt pre-tightening mechanism, the effect of automatically completing tensioning and pre-tightening of the bolt in a stepping mode is achieved, a nut does not need to be screwed manually through a tool, the safety risk of manual operation is reduced, the connecting efficiency of the flange bolt is improved, the automation degree is high, operation is easy and convenient, work is reliable, and the bolt pre-tightening workload is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bolt tensioning, and in particular to a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set. Background Art

[0002] During the installation of wind turbine towers, a large number of flange bolts must be pre-tightened to the specified load to meet the design, use and safety requirements. Currently, this type of work is mainly done manually, which is inefficient and risky.

[0003] A Chinese patent document CNACN116745070A discloses an improved bolt tensioner, including 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 at least one piston and is used to receive a pressurized fluid to apply a tensioning force and a restoring force to the at least one piston, respectively. The piston can be operated in two directions, tensioning and retracting, under the action of fluid pressure; however, the technical content does not solve the technical problem of continuous step-by-step tensioning of bolts during the installation of the wind turbine tower, and there is still a situation where manual auxiliary equipment is used to tension multiple bolts.

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

[0005] 1. Technical issues to be resolved The problem to be solved by the present invention is to provide a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set to overcome the defects in the prior art.

[0006] (II) Technical solution In order to solve the technical problem, the present invention provides a step-by-step automatic tensioning device for flange bolts of a wind turbine, comprising a bolt pre-tightening mechanism matched with a nut on a flange seat, the bolt pre-tightening mechanism comprising a first tensioning module and a second tensioning module, an adjusting module being connected between the first tensioning module and the second tensioning module, the adjusting module being matched with the first tensioning module and the second tensioning module to perform step-by-step automatic tensioning on the nut on the flange seat; The adjustment module comprises a first swing arm and a second swing arm, wherein the first swing arm and the second swing arm are hinged via a hinge shaft, and the hinge shaft is connected to a rotation servo motor; The first tensioning module and the second tensioning module include internal spline screws, the two internal spline screws are respectively threadedly connected to the first swing arm and the second swing arm, and the two internal spline screws are respectively connected to a stretching servo motor; The internal spline screw is connected with a tensioning cylinder, and the tensioning cylinder cooperates with the nut.

[0007] Furthermore, a stretching head is provided in the tensioning oil cylinder, and a matching head is matched between the stretching head and the tensioning oil cylinder.

[0008] Furthermore, the stretching head can be clamped and matched with the bolts on the flange seat.

[0009] Furthermore, a connecting seat is connected to the lower end of the tensioning oil cylinder, and the connecting seat is rotatably connected to a tensioner located below the tensioning oil cylinder.

[0010] Furthermore, the connection seat is rotatably connected to a tensioning wheel, a synchronous belt motor is arranged on the connection seat, and an output wheel of the synchronous belt motor, the tensioner and the tensioning wheel are connected to a transmission belt.

[0011] Furthermore, the axial line of the tensioner and the axial line of the internal spline screw are located on the same vertical line.

[0012] Furthermore, the first swing arm and the second swing arm are both provided with electromagnetic opening and closing nuts that cooperate with the internal spline screw.

[0013] Furthermore, the first tensioning module and the second tensioning module cooperate with the adjusting module to step-by-step tighten the nut on the flange seat.

[0014] (III) Beneficial effects Compared with the prior art, the wind turbine flange bolt step-by-step automatic tensioning device provided by the present invention has the following beneficial effects: By setting a bolt pre-tightening mechanism that cooperates with the nut on the flange seat, the bolt pre-tightening mechanism includes a first tensioning module and a second tensioning module, an adjustment module is connected between the first tensioning module and the second tensioning module, and the adjustment module cooperates with the first tensioning module and the second tensioning module to perform step-by-step automatic tensioning on the nut on the flange seat; Through step-by-step automatic tensioning work: the opening and closing nuts are engaged for closing, and vice versa for opening; the tensioning cylinder is inletting oil for tensioning, and outleting oil for unloading; the synchronous belt motor tightens the nuts for tightening, and does not tighten the nuts for stopping; the stretching servo motors on the first tensioning module and the second tensioning module, and the rotation servo motor on the adjustment module rotate clockwise for forward rotation, counterclockwise for reverse rotation, and do not rotate for stopping; the bolt tensioning and pre-tightening effect is achieved by step-by-step automatic completion, without manual operation using tool knobs, reducing the safety risks of manual operation, and improving the connection efficiency of flange bolts. It has a high degree of automation, is easy to operate, works reliably, and greatly reduces the workload of bolt pre-tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a first stereoscopic diagram of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Figure 2 A second stereoscopic view of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator system according to the present invention; Figure 3 A cross-sectional view of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Figure 4 A schematic diagram of a bolt pre-tightening mechanism of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator system according to the present invention; Figure 5 A schematic diagram of a bolt pre-tightening mechanism of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention from another perspective; Figure 6 A bottom view of a bolt pre-tightening mechanism of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Figure 7 A cross-sectional view of a bolt pre-tightening mechanism of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Figure 8 This is a schematic diagram of a first working state of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Fig. 9 It is a schematic diagram of a second working state of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; Fig.10 A schematic diagram of the working steps of a step-by-step automatic tensioning device for flange bolts of a wind turbine generator set according to the present invention; The corresponding component names of the various figure marks in the figure are: 1. Flange seat; 2. Bolt; 3. Nut; 4. Tensioning cylinder; 5. Fitting head; 6. Tensioner; 7. Stretching head; 8. Internal spline screw; 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

[0017] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0019] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0020] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0021] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0022] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0023] See also Figures 1 to 10 The present invention provides a step-by-step automatic tensioning device for flange bolts of a wind turbine generator, 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, 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 perform step-by-step automatic tensioning on the nut 3 on the flange seat 1; The adjustment module C includes a first swing arm 13 and a second swing arm 14, the first swing arm 13 and the second swing arm 14 are hinged via a hinge shaft, and the hinge shaft is connected to a rotation servo motor 15; The first tensioning module A and the second tensioning module B include an internal spline screw 8, the two internal spline screws 8 are respectively threadedly connected to the first swing arm 13 and the second swing arm 14, and the two internal spline screws 8 are respectively connected to the stretching servo motor 16; The inner spline screw 8 is connected to a tensioning cylinder 4 , and the tensioning cylinder 4 cooperates with the nut 3 .

[0024] See also Figures 2 to 9 A stretching head 7 is provided in the tensioning cylinder 4, and a matching head 5 is matched between the stretching head 7 and the tensioning cylinder 4. The stretching head 7 can be clamped with the bolts on the flange seat 1. The lower end of the tensioning cylinder 4 is connected to a connecting seat 10, and the connecting seat 10 is rotatably connected to the tensioner 6 located below the tensioning cylinder 4. The connecting seat 10 is rotatably connected to the tensioning wheel 1011, and a synchronous belt motor 11 is provided on the connecting seat 10. The output wheel of the synchronous belt motor 11 and the tensioner 6 and the tensioning wheel 1011 are connected to a transmission belt 1012.

[0025] See also Figures 3 to 10 The axial line of the tensioner 6 and the axial line of the internal spline screw 8 are located on the same vertical line. The first swing arm 13 and the second swing arm 14 are both provided with electromagnetic opening and closing nuts 9 that cooperate with the internal spline screw 8. The first tensioning module A and the second tensioning module B cooperate with the adjustment module C to step by step tighten the nut 3 on the flange seat 1.

[0026] This embodiment provides a wind turbine flange bolt step-by-step automatic tensioning device: Instructions attached Figure 8 , 9 , the numbers 1-6 in 10 correspond to the multiple nuts 3 on the flange seat 1, and each number corresponds to a nut 3; The first tensioning module A is identical to the second tensioning module B. The first tensioning module A tensions the double-numbered bolts 2, and the second tensioning module B tensions the single-numbered bolts 2. The first tensioning module A and the second tensioning module both include: an electromagnetic opening and closing nut 9, an internal spline screw 8, a tensioner 6, a stretching head 7, a tensioning cylinder 4, a synchronous belt motor 11, etc.; the adjustment module C includes a first swing arm 13, a second swing arm 14, and a rotary servo motor 15.

[0027] After the tensioning cylinder 4 on the first swing arm 13 and the second swing arm 14 clamp the bolts 2 corresponding to nuts ① and ②, 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 nuts ① and ② are tensioned on the flange seat 1. After the tensioning operation of nuts ① and ② is completed; the tensioning cylinder 4 on the second swing arm 14 releases the clamping operation on nut ② (the tensioning cylinder 4 of the first swing arm 13 keeps clamping bolt ① 2), and the output shaft of the stretching servo motor 16 on the second swing arm 14 drives the internal spline The screw rod 8 rotates, so that the internal spline screw rod 8 cooperates with the internal threaded sleeve of the second swing arm 14 to rise, so that the tensioning cylinder 4 on the second swing arm 14 is separated from the No. ② nut 3 and the No. ② bolt 2, and the rotating servo motor 15 operates to make the tensioning cylinder 4 on the second swing arm 14 move to the corresponding upper position of the No. ③ nut 3, and then the stretching servo motor 16 on the second swing arm 14 rotates in the opposite direction, so that the tensioning cylinder 4 and the tensioner 6 correspond to the No. ③ nut and then perform the tensioning work on the No. ③ nut, and repeat the above steps, with the first swing arm 13 clamping the No. ① bolt 2 as the base point, and the tensioner 6 on the second swing arm 14 performs the tensioning work on the No. ②-⑥ nuts 3 in a step-by-step manner.

[0028] The working steps of this device are as follows: Fig.10 The steps are shown as follows: the electromagnetic opening and closing nut 9 is engaged for "closed", and vice versa for "opened"; the tensioning cylinder 4 is inlet for "tension", and outlet for "unloading"; the synchronous belt motor 11 tightens the nut 3 for "tight", and does not tighten the nut 3 for "stop"; the stretching servo motor 16 on the first tensioning module A and the second tensioning module B, and the rotation servo motor 15 on the adjustment module C rotate clockwise for "forward", counterclockwise for "reverse", and do not rotate for "stop"; The tensioning and pre-tightening mechanism performs a step-by-step tensioning operation on the nut 3 on the flange seat 1 through the first tensioning module A and the second tensioning module B in cooperation with the adjustment module C, thereby achieving a step-by-step automatic tensioning and pre-tightening effect of the bolt, without the need for manual operation using a tool knob, thus reducing the safety risk of human operation, improving the connection efficiency of the flange bolt 2, having a high degree of automation, simple operation, reliable operation, and greatly reducing the workload of bolt pre-tightening.

[0029] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0030] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A step-by-step automatic tensioning device for flange bolts of a wind turbine generator system, comprising a bolt pre-tightening mechanism cooperating with a nut (3) on a flange seat (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 perform step-by-step automatic tensioning on the nut (3) on the flange seat (1); The adjustment module (C) comprises a first swing arm (13) and a second swing arm (14), wherein the first swing arm (13) and the second swing arm (14) are hingedly connected via a hinge shaft, and the hinge shaft is connected to a rotation servo motor (15); The first tensioning module (A) and the second tensioning module (B) comprise internal spline screws (8), the two internal spline screws (8) being respectively threadedly connected to the first swing arm (13) and the second swing arm (14), and the two internal spline screws (8) being respectively connected to a stretching servo motor (16); The internal spline screw (8) is connected to a tensioning cylinder (4), and the tensioning cylinder (4) cooperates with the nut (3).

2. The wind turbine flange bolt step-by-step automatic tensioning device according to claim 1, characterized in that: A stretching head (7) is arranged in the tensioning oil cylinder (4), and a matching head (5) is matched between the stretching head (7) and the tensioning oil cylinder (4).

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

4. The wind turbine flange bolt step-by-step automatic tensioning device according to claim 1, characterized in that: The lower end of the tensioning oil cylinder (4) is connected to a connecting seat (10), and the connecting seat (10) is rotatably connected to a tensioner (6) located below the tensioning oil cylinder (4).

5. The wind turbine flange bolt step-by-step automatic tensioning device according to claim 4, characterized in that: The connection seat (10) is rotatably connected to a tensioning wheel (1011), a synchronous belt motor (11) is provided on the connection seat (10), and a transmission belt (1012) is connected to the output wheel of the synchronous belt motor (11), the tensioner (6), and the tensioning wheel (1011).

6. The wind turbine flange bolt step-by-step automatic tensioning device according to claim 4, characterized in that: The axial line of the tensioner (6) and the axial line of the internal spline screw (8) are located on the same vertical line.

7. The wind turbine flange bolt 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 an electromagnetic opening and closing nut (9) that cooperates with the internal spline screw (8).

8. The wind turbine flange bolt 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 adjustment module (C) to step-by-step tighten the nut (3) on the flange seat (1).

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