Rapid nut pre-tightening device for wind turbine generator

Abstract

The utility model discloses a wind turbine generator nut quick pre-tightening device which comprises an installation base and a pressure suction cup, a magnetic suction cup is arranged at the bottom of the installation base, a connecting hole is formed in the surface of the magnetic suction cup, an inserting rod is arranged in the connecting hole in a penetrating mode, and the pressure suction cup is arranged at the end of the inserting rod. Mounting pieces are fixed to the left side and the right side of the mounting base, bolt holes are formed in the mounting pieces, and a motor is mounted at the upper end of the mounting base. According to the rapid pre-tightening device for the wind turbine generator nut, the telescopic rod is driven to rotate through the motor, the nut clamping cylinder can achieve lifting and rotating work under rotation of the motor and stretching and retracting of the telescopic rod, so that external force is applied to the nut, the nut pre-tightening work can be achieved, the nut clamping cylinder and the telescopic rod are connected in a clamped mode, and the nut clamping cylinder is not prone to falling. The nut clamping cylinder is convenient to disassemble and assemble, so that the nut clamping cylinder consistent with the nut in size is replaced; the pressure suction cup is connected with the bottom of the magnetic suction cup through clamping connection between the connecting hole and the inserting rod.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine production, in particular to a fast pre-tightening device for nuts of a wind turbine. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine is generally composed of a wind wheel, a generator (including a device), a stabiliser (tail), a tower, a speed limit safety mechanism and an energy storage device. Nuts are used to limit the installation of wind turbines. Nuts are a common part for connecting fasteners. Pretightening refers to actively applying a certain torque when assembling the connector so that the axial force of the nut and thread reaches a certain level to ensure the reliability and safety of the fastener. After pretightening, the mechanical stress value of the nut increases, which can effectively prevent the nut itself from loosening due to vibration, temperature changes and other reasons; after the nut is pretightened, the possibility of loose connection is reduced, which can reduce the damage caused by wear and loosening of parts; the pretightened nut can increase the axial force, thereby improving the connecting rod The spiraling ability of the nut needs to be determined when pre-tightening the nut. The size of the torque to be applied needs to be determined generally based on the material and diameter of the connected parts, the thread type, the specifications of the fasteners, and the use environment. When pre-tightening the nut, the correct torque value needs to be selected based on the material, diameter, thread type, and environment of the fasteners, otherwise it will affect the service life of the nut; the use environment of the fastener needs to be carefully checked to prevent the torque value from being too large or too small during pre-tightening, which may cause the fasteners to loosen or break; the torque value of the fasteners needs to be tested again after pre-tightening to ensure that it meets the relevant national standards; after the fasteners have been used for a long time, they need to be inspected and re-tightened periodically to ensure their reliability and safety.

[0003] As shown in application number CN202322427219.7, the utility model relates to a fast pre-tightening device for nuts of a wind turbine set, which is installed in the cabin of a wind turbine, and includes a non-magnetic ring installed at the bottom of the cabin and rotating synchronously with the cabin, a starting reference point is arranged at the bottom of the non-magnetic ring, and a plurality of permanent magnet blocks are arranged at intervals around the circumference in a clockwise direction around the starting reference point at the bottom of the non-magnetic ring, and adjacent permanent magnet blocks do not contact each other, and the magnetic magnitudes of each permanent magnet block are different; it also includes a magnetic induction sensor arranged below the non-magnetic ring, and when the non-magnetic ring rotates synchronously with the cabin, the magnetic induction sensor senses the permanent magnet block located above; it also includes a controller, and the controller includes a power module, a single-chip microcomputer, an ac-dc converter, and a communication interface; the above-mentioned electronic components are connected in a coordinated manner. The fast pre-tightening device for nuts of a wind turbine set uses a contactless induction method to sense the steering angle of the cabin of the wind turbine, avoid mechanical wear, and effectively improve the service life of the limit induction structure.

[0004] Similar to the above application, there are still the following deficiencies:

[0005] The existing device generates heat when working, and the heat will accumulate at the bottom of the device, which will affect the operation of the device to a certain extent.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and a wind turbine nut quick pre-tightening device is proposed, in order to achieve a more practical purpose. Utility Model Content

[0007] The utility model aims to provide a wind turbine nut quick pre-tightening device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wind turbine nut quick pre-tightening device, comprising a mounting base and a pressure suction cup, a magnetic suction cup is arranged at the bottom of the mounting base, and a connecting hole is opened on the surface of the magnetic suction cup, an insertion rod is passed through the interior of the connecting hole, the pressure suction cup is arranged at the end of the insertion rod, mounting plates are fixed on the left and right sides of the mounting base, and bolt holes are opened inside the mounting plates, and a motor is installed at the upper end of the mounting base.

[0009] Furthermore, a connecting disk is provided at the upper end of the motor, and a rotating shaft is installed on the surface of the connecting disk.

[0010] Furthermore, the connection hole and the insertion rod are snap-connected, and the insertion rod is distributed in a ring shape with respect to the center of the pressure suction cup.

[0011] Furthermore, the shape and structure of the pressure chuck is consistent with the shape and structure of the magnetic chuck.

[0012] Furthermore, a telescopic rod is installed at the upper end of the rotating shaft, and a nut clamping cylinder is installed at the upper end of the telescopic rod.

[0013] Furthermore, a clamping block is provided at the top end of the telescopic rod, and a clamping groove is provided on the bottom surface of the nut clamping tube.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model drives the telescopic rod to rotate through a motor, and the nut clamping tube can realize lifting and rotating work under the rotation of the motor and the extension and retraction of the telescopic rod, thereby applying external pressure to the nut to realize the pre-tightening of the nut. The nut clamping tube and the telescopic rod are snap-fitted, which is convenient for disassembling and assembling the nut clamping tube, so as to replace the nut clamping tube with the same size as the nut.

[0016] 2. The utility model can connect the pressure suction cup to the bottom of the magnetic suction cup through the snap connection between the connecting hole and the insertion rod. The pressure suction cup has good adsorption force and can connect the magnetic suction cup to the workbench to play a good limiting role. At the same time, the cooperation with the bolt can greatly improve the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of a wind turbine nut quick pre-tightening device of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a mounting base of a wind turbine nut quick pre-tightening device according to the utility model, viewed from above;

[0019] Figure 3 This is a schematic diagram of the structure of a nut clamping tube and a telescopic rod of a wind turbine nut quick pre-tightening device of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of a connecting hole-pressure suction cup structure of a wind turbine nut quick pre-tightening device.

[0021] In the figure: 1. Mounting base; 2. Mounting plate; 3. Bolt hole; 4. Motor; 5. Connecting plate; 6. Rotating shaft; 7. Telescopic rod; 8. Nut clamping tube; 9. Magnetic suction cup; 10. Snap-in block; 11. Snap-in groove; 12. Connecting hole; 13. Insertion rod; 14. Pressure suction cup. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0023] like Figure 1-Figure 4As shown, a quick pre-tightening device for nuts of a wind turbine generator system comprises a mounting base 1 and a pressure suction cup 14, a magnetic suction cup 9 is arranged at the bottom of the mounting base 1, and a connecting hole 12 is provided on the surface of the magnetic suction cup 9, an insertion rod 13 is passed through the interior of the connecting hole 12, and the pressure suction cup 14 is arranged at the end of the insertion rod 13, mounting plates 2 are fixed on the left and right sides of the mounting base 1, and bolt holes 3 are provided inside the mounting plates 2, a motor 4 is installed at the upper end of the mounting base 1, further, a connecting plate 5 is provided at the upper end of the motor 4, and a rotating shaft 6 is installed on the surface of the connecting plate 5, further, the connecting hole 12 is snap-fittedly connected with the insertion rod 13, and the insertion rod 13 is distributed in a ring shape with respect to the center of the pressure suction cup 14, further, the shape structure of the pressure suction cup 14 is consistent with the shape structure of the magnetic suction cup 9, further, a telescopic rod is installed at the upper end of the rotating shaft 6 7, and a nut clamping cylinder 8 is installed at the upper end of the telescopic rod 7. Furthermore, a clamping block 10 is provided at the top of the telescopic rod 7, and a clamping groove 11 is opened on the bottom surface of the nut clamping cylinder 8. The telescopic rod 7 is driven to rotate by the motor 4. The nut clamping cylinder 8 can realize the lifting and rotating work under the rotation of the motor 4 and the extension and contraction of the telescopic rod 7, thereby applying external force to the nut to realize the pre-tightening of the nut. The nut clamping cylinder 8 and the telescopic rod 7 are in a clamping connection, which is convenient for disassembling and assembling the nut clamping cylinder 8, thereby replacing the nut clamping cylinder 8 with the same size of the nut; through the clamping connection between the connecting hole 12 and the insertion rod 13, the pressure suction cup 14 can be connected to the bottom of the magnetic suction cup 9. The pressure suction cup 14 has a good adsorption force and can connect the magnetic suction cup 9 to the workbench, which plays a good limiting role. At the same time, the cooperation with the bolt can greatly improve the stability of the device.

[0024] Working principle: When this wind turbine nut quick pre-tightening device is in use, first Figure 1-Figure 4 , press the pressure suction cup 14 and insert the insertion rod 13 on its surface into the connecting hole 12, so that the magnetic suction cup 9 can be connected to the bottom of the mounting base 1, and then the bolt is passed through the mounting plate 2, thereby limiting the mounting base 1. After installation, replace the nut clamping tube 8 of the same size according to the size of the nut, press 8 so that the clamping groove 11 at the bottom is connected with the clamping block 10 at the upper end of the telescopic rod 7, thereby limiting the nut clamping tube 8, put the nut into the nut clamping tube 8, and then turn on the motor 4 and the telescopic rod 7 to drive the nut clamping tube 8 to lift and rotate, so that the nut can be installed on the wind turbine. The nut clamping tube 8 and the telescopic rod 7 are in a snap-fit ​​connection, which is convenient for disassembling and assembling the nut clamping tube 8, thereby replacing the nut clamping tube 8 of the same size as the nut.

[0025] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A wind turbine nut quick pre-tightening device, comprising a mounting base (1) and a pressure suction cup (14), characterized in that: A magnetic suction cup (9) is arranged at the bottom of the mounting base (1), and a connection hole (12) is provided on the surface of the magnetic suction cup (9), an insertion rod (13) is inserted into the interior of the connection hole (12), and the pressure suction cup (14) is arranged at the end of the insertion rod (13). Mounting plates (2) are fixed on the left and right sides of the mounting base (1), and bolt holes (3) are provided in the interior of the mounting plates (2). A motor (4) is installed at the upper end of the mounting base (1).

2. A wind turbine nut quick pre-tightening device according to claim 1, characterized in that: A connecting disk (5) is provided at the upper end of the motor (4), and a rotating shaft (6) is mounted on the surface of the connecting disk (5).

3. A wind turbine nut quick pre-tightening device according to claim 2, characterized in that: The connection hole (12) and the insertion rod (13) are snap-fitted and connected, and the insertion rod (13) is distributed in a ring shape with respect to the center of the pressure suction cup (14).

4. A wind turbine nut quick pre-tightening device according to claim 1, characterized in that: The shape and structure of the pressure suction cup (14) are consistent with the shape and structure of the magnetic suction cup (9).

5. A wind turbine nut quick pre-tightening device according to claim 2, characterized in that: A telescopic rod (7) is installed at the upper end of the rotating shaft (6), and a nut clamping cylinder (8) is installed at the upper end of the telescopic rod (7).

6. A wind turbine nut quick pre-tightening device according to claim 5, characterized in that: A clamping block (10) is provided at the top end of the telescopic rod (7), and a clamping groove (11) is provided on the bottom surface of the nut clamping cylinder (8).

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