Automatic welding equipment for fan stator bracket and welding method thereof

Abstract

The invention discloses automatic welding equipment for a fan stator support and a welding method of the automatic welding equipment, and relates to the technical field of welding equipment. According to the welding equipment, preliminary clamping of the supporting arm is achieved through the elastic force of the second spring and the third spring, the flexibility of a workpiece in the clamping and correcting process is guaranteed, and meanwhile workpiece deformation caused by rigid clamping is avoided. When the welding end of the supporting arm abuts against the outer wall of the supporting ring, extrusion force is transmitted to a pressure sensing switch on the limiting plate, an electromagnet circuit is automatically switched on, an electromagnet generates magnetic force to attract a powerful magnet at the bottom of the first lifting plate, the first lifting plate further moves downwards, and the clamping plate conducts secondary rigid clamping on the supporting arm and locks the position of a workpiece. After secondary clamping, the supporting arm does not have any axial and radial displacement in the welding process, the defects of uneven welding penetration, welding line deflection, welding deformation and the like caused by workpiece looseness are avoided, and the welding strength and the finished product percent of pass of the fan stator support are improved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an automatic welding device and welding method for a wind turbine stator support. Background Technology

[0002] The stator support is the core support component for assembling the stator core of a wind turbine. It is formed by welding a stator support ring and multiple stator support arms, which are distributed and welded along the circumference of the support ring. The welding accuracy, coaxiality, and weld strength directly determine the assembly stability of the stator core, and thus affect the operational safety and service life of the entire wind turbine. Therefore, the industry has put forward stringent requirements for the welding process of this component, which are characterized by high precision and high consistency.

[0003] Referring to the automatic laser welding device for motor stator core disclosed in patent application CN115533305B, the device allows the motor stator core to rotate via a support base and a first driving component. A movable frame can move along a slide groove via a driving assembly. When the adjusting component is positioned close to the motor stator core on the movable frame, the device facilitates position adjustment of the motor stator core on the support base and cleaning of the outer side of the motor stator core. A rotating component can move the adjusting component away from the motor stator core, positioning the welding component close to the motor stator core on the movable frame. This allows the welding component to move with the movable frame and perform welding operations on the motor stator core. The device is easy to operate, allowing for convenient adjustment of the motor stator core's position and facilitating welding operations.

[0004] The aforementioned automatic laser welding device for stator cores has the following drawbacks in practical use: 1) Before welding, the operator's experience is required to align and position the support arm and the support ring. After completing the welding operation of the support arm in one position, the positioning and welding operation of the support arm needs to be repeated many times. The multiple positioning, clamping and welding operations of the support arm are carried out in steps, which results in long welding preparation time and low overall processing efficiency. Moreover, when the positioning operation of the support arm and the support ring is performed many times, problems such as coaxiality deviation of multiple support arms and uneven circumferential spacing are very likely to occur, resulting in excessive gap between the workpieces after welding and skewed weld seam. This not only reduces the welding strength, but also affects the stability of the fan operation. 2) Secondly, although some automated welding equipment can replace human experience in positioning the support arm and support ring before welding, the positioning action relies too much on components such as electric cylinders and servo motors. After long-term use, these components have many failure points, resulting in poor equipment reliability and making it impossible to reliably guarantee the positioning accuracy of the support arm and support ring during high-frequency welding operations in the long term.

[0005] Therefore, this invention proposes an automatic welding device and welding method for wind turbine stator supports to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatic welding device and welding method for wind turbine stator supports. It solves the problems of existing welding equipment requiring experience to align the support arms and support rings, necessitating repeated positioning and welding after each weld, and involving multiple clamping and step-by-step operations, resulting in long preparation times, low processing efficiency, and frequent positioning deviations that can lead to uneven coaxiality and circumferential spacing of the support arms, causing weld seam skewing, reduced welding strength, and impacting wind turbine operational stability. Furthermore, while some automated equipment can perform positioning, it relies excessively on components such as electrically controlled cylinders and servo motors, leading to high failure rates, poor reliability, and difficulty in maintaining long-term positioning accuracy.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic welding device for a wind turbine stator support, comprising a welding table, a platform disposed on one side of the welding table, and a wind turbine stator support body, wherein the wind turbine stator support body is connected by welding of a stator support ring and multiple stator support arms, and further comprising: The welding assembly includes a linear module fixedly mounted on the top of a platform, and an arc welding robot for welding the stator support body of a wind turbine is mounted on the top of the linear module. The linear module can drive the arc welding robot to slide along its outer wall to change its welding position. The support plate is rotatably mounted on the top of the welding table. Multiple slide rails are evenly fixed on the top of the support plate. The top of the slide rails is provided with long strip-shaped through grooves. A No. 1 welding positioning mechanism is slidably sleeved on the outer wall of the slide rails for correcting and clamping the welding position of the stator support arm by its own weight. After the multiple stator support arms are positioned and clamped, they are automatically assembled with the stator support ring before welding. The lifting groove is located at the top center of the bearing plate. Inside the lifting groove, there is a second welding positioning mechanism for lifting the stator support arm and automatically correcting and clamping the position of the stator support arm before welding. Under the gravity of the stator support ring, the second welding positioning mechanism automatically forms its top and the top of the bearing plate at the same level. Furthermore, it also includes a power transmission assembly, which includes movable slots evenly distributed on the top of the support plate and corresponding one-to-one with the positions of multiple first welding positioning mechanisms. Each movable slot also has an air chamber on its side wall. The air chamber is connected to the second welding positioning mechanism through a gas channel, which is located inside the support plate. When the second welding positioning mechanism moves down, the power transmission assembly drives multiple first welding positioning mechanisms to move towards itself synchronously, so as to complete the operation of the welding ends of multiple stator support arms abutting against the outer wall of the stator support ring. The first welding positioning mechanism includes a clamping sleeve and a sliding sleeve fixedly disposed at the bottom of the clamping sleeve. The sliding sleeve is slidably disposed on the outer wall of the slide rail. A drive rod is fixedly disposed on the side wall of the clamping sleeve and slidably disposed inside the movable groove. A push-pull rod is fixedly disposed on the lower side wall of the drive rod near the clamping sleeve. A first piston is fixedly disposed at the end of the push-pull rod away from the drive rod and slidably disposed in the air chamber at the corresponding position. A first spring is slidably disposed on the outer wall of the push-pull rod between the first piston and the inner wall of the air chamber at the corresponding position.

[0008] Furthermore, each of the inner walls of the clamping sleeve is provided with a receiving groove, and a clamping plate is slidably disposed in each of the two receiving grooves. A guide rod is fixedly disposed at each of the four corners of the outer wall of the clamping plate. The guide rod slides through the outer wall of the clamping sleeve and is fixedly disposed with a first spring baffle. A second spring is slidably sleeved on the outer wall of the guide rod and located between the first spring baffle and the outer wall of the clamping sleeve. A wedge-shaped groove is provided in the middle of the side wall of the clamping plate near the receiving groove. A first lifting plate is movably disposed below the two clamping plates. Multiple third springs are uniformly fixed between the bottom of the first lifting plate and the bottom of the inner cavity of the clamping sleeve. A drive arm is symmetrically fixed on both sides of the outer wall of the first lifting plate. Rollers are rotatably disposed on the side wall of the drive arm. The positions of the two rollers correspond one-to-one with the positions of the wedge grooves on both sides. The two rollers slide along the inclined inner wall of the wedge grooves at their respective positions. A cross-shaped long slide groove is opened on both sides of the top of the first lifting plate. A limiting plate for limiting the position of the stator support arm is slidably disposed in the two cross-shaped long slide grooves. The limiting plate can be locked to the cross-shaped long slide groove by bolts.

[0009] Furthermore, the second welding positioning mechanism includes a circular support plate slidably disposed inside the lifting groove and a circular through hole opened at the middle position of the top of the circular support plate. The top of the circular support plate is evenly provided with multiple sliding grooves. A screw is rotatably disposed inside each sliding groove. The screw rotates through the sliding groove and extends into the interior of the circular through hole. A gear is fixedly disposed at one end of the screw located inside the circular through hole. An inner support plate is also threaded on the outer wall of the screw. The inner support plate is slidably disposed in the sliding groove at the corresponding position.

[0010] Furthermore, a second lifting plate is slidably disposed inside the circular through hole, and multiple guide grooves are evenly opened on the inner wall of the circular through hole. A guide slider is slidably disposed in each guide groove. All guide sliders are fixedly disposed on the outer wall of the second lifting plate. A limiting ring for limiting the descent height of the second lifting plate is fixedly disposed on the inner wall of the circular through hole below the second lifting plate. A transmission rod is fixedly disposed at the bottom of the second lifting plate. A second spring baffle that abuts against the bottom of the lifting groove is also fixedly disposed at the bottom end of the transmission rod. A fourth spring is slidably sleeved on the outer wall of the transmission rod between the second spring baffle and the bottom of the circular support plate. A rack corresponding to the positions of multiple gears is evenly fixedly disposed on the top of the second lifting plate. Each rack is meshed with the gear at the corresponding position. Limiting stops for limiting the descent height of the circular support plate are also fixedly disposed on both sides of the bottom of the lifting groove. When the bottom of the circular support plate abuts against the top of the limiting stops, the top of the circular support plate and the top of the support plate are on the same plane.

[0011] Furthermore, the bottom of the circular support plate is also uniformly provided with pneumatic components that correspond one-to-one with the positions of multiple welding positioning mechanisms. The multiple pneumatic components are used to input the air inside themselves into the air chamber at the corresponding position when the circular support plate moves down. The pneumatic components include an air cylinder fixedly installed at the bottom of the lifting groove. A second piston is slidably installed inside the air cylinder. A piston rod is fixedly installed on the top of the second piston. The piston rod slides through the air cylinder and is fixedly installed at the bottom of the circular support plate. A fifth spring is slidably sleeved on the outer wall of the piston rod between the air cylinder and the circular support plate. An exhaust port is opened at the bottom of the air cylinder, and the exhaust port is connected to the gas channel at the corresponding position.

[0012] Furthermore, a servo motor is fixedly installed at the bottom of the welding station. The output shaft of the servo motor rotates through the welding station and is fixedly connected to the bottom of the support plate to drive the support plate to rotate and switch welding positions. This works in conjunction with the arc welding robot to complete the welding operation on the stator support arms at multiple positions. A controller is also fixedly installed on one side of the outer wall of the welding station. This controller is used to control the servo motor and the arc welding robot to operate according to the set program.

[0013] Furthermore, a powerful magnet is fixedly installed at the bottom center of the first lifting plate. An installation groove is provided at the bottom of the clamping sleeve cavity opposite to the powerful magnet. An electromagnet is fixedly installed in the installation groove. A pressure sensing switch for controlling the current of the electromagnet circuit is also fixedly installed on the side wall of the limiting plate near the drive rod. The squeezing force generated when the end of the stator support arm abuts against the outer wall of the stator support ring is transmitted to the pressure sensing switch through the stator support arm. The magnetic force generated by the energization of the electromagnet circuit attracts the powerful magnet downwards, so as to further pull the first lifting plate downwards. The two clamping plates further clamp the stator support arm. A manual switch for controlling the electromagnet circuit is also provided on the outer wall of the welding station.

[0014] This invention also discloses an automatic welding method for wind turbine stator supports, employing automatic welding equipment for wind turbine stator supports. The method includes the following steps: Step 1: Use a crane to hoist the stator support arm to be welded into the designated position in multiple No. 1 welding positioning mechanisms in sequence. Use the weight of the stator support arm itself to drive the No. 1 welding positioning mechanism to complete the initial position correction and clamping operation. Step 2: Then, the stator support ring is hoisted to the top center of the No. 2 welding positioning mechanism. The gravity of the stator support ring pushes the No. 2 welding positioning mechanism to move down along the inner wall of the lifting groove until the top of the No. 2 welding positioning mechanism and the top surface of the bearing plate are on the same horizontal plane. During this process, the position of the No. 2 welding positioning mechanism is automatically corrected and locked. At the same time, multiple No. 1 welding positioning mechanisms are driven by the downward movement force of the No. 2 welding positioning mechanism to move synchronously towards the center of the bearing plate until the ends of multiple stator support arms to be welded abut against the outer wall of the stator support ring. Step 3: The arc welding robot performs welding on the connection position of one of the stator support arms and the stator support ring according to the control instructions. After completing the welding operation at this position, the carrier plate rotates at a preset angle according to the set program to perform the welding operation again. This process is repeated until the welding is completed, and then the entire wind turbine stator support body is removed from the carrier plate.

[0015] This invention provides an automatic welding device and welding method for wind turbine stator supports. Compared with the prior art, it has the following advantages: 1. This automatic welding equipment and method for wind turbine stator supports involves hoisting a support arm to a first positioning mechanism. The support arm's own weight presses down on a first lifting plate, and the drive arm drives rollers to slide along the inclined inner wall of a wedge-shaped groove, pushing the clamping plates on both sides to move towards each other. This achieves both elastic clamping of the support arm and simultaneous correction of the support arm to the center position of the top of the first lifting plate, integrating clamping and correction to avoid welding deviations caused by misalignment of the support arm. Secondly, after the stator support ring is hoisted to a second positioning mechanism, its gravity pushes a circular bearing plate downwards. When the transmission rod abuts the bottom of the lifting groove, the second lifting plate moves upwards, driving the rack and pinion gear to rotate. The screw rotates synchronously, causing multiple inner support plates to extend outwards along the sliding groove, forming a uniform inner support force on the inner wall of the support ring. This corrects the support ring to a coaxial state with the bearing plate, ensuring the center accuracy of the support ring as the welding reference and avoiding uneven circumferential spacing during subsequent welding of the support arm and support ring.

[0016] 2. The automatic welding equipment and welding method for wind turbine stator supports, wherein while the second positioning mechanism moves downward, the pneumatic component drives multiple first positioning mechanisms to move towards the center simultaneously, so that the welding ends of all support arms are precisely pressed against the outer wall of the support ring at the same time, and the support arms move towards the limiting plate during the pressing process to complete the axial position correction, ensuring the welding fit between the support arms and the support ring, and avoiding welding defects caused by excessive gaps or poor fit.

[0017] 3. The automatic welding equipment and welding method for wind turbine stator support, through the initial clamping and correction of the support arm, the internal support and correction of the support ring, and the synchronous movement of the first mechanism driven by the second mechanism, are all triggered by the gravity of the stator support arm and the support ring itself. There is no need to set up additional driving components such as cylinders and motors, which simplifies the power system and reduces the number of failure points. When the circular support plate of the second positioning mechanism moves down, it simultaneously pushes the piston rod of the pneumatic component down. The second piston compresses the air in the air cylinder and transmits it evenly to each air chamber through the gas channel, pushing the first piston to drive the drive rod to move. This achieves synchronous and uniform approach of multiple first positioning mechanisms towards the center, ensuring that the clamping force and displacement of all support arms and support rings are consistent, avoiding positioning deviation of a single support arm. Moreover, the first to fifth springs in the equipment provide elastic reset force for each moving component. After welding is completed and the workpiece is lifted, each spring can automatically drive the clamping plate, inner support plate, first lifting plate, circular support plate and other components to reset to the initial state without manual adjustment, ensuring the positioning accuracy of the next welding.

[0018] 4. This automatic welding equipment and method for wind turbine stator supports utilizes the elastic force of a second and third spring to initially clamp the support arm, ensuring workpiece flexibility during clamping and correction while avoiding workpiece deformation caused by rigid clamping. When the welding end of the support arm abuts against the outer wall of the support ring, the pressure is transmitted to the pressure sensor switch on the limit plate, automatically activating the electromagnet circuit. The electromagnet generates magnetic force to attract the strong magnet at the bottom of the first lifting plate, causing the first lifting plate to move further down. The clamping plate then achieves secondary rigid clamping of the support arm, locking the workpiece position. After secondary clamping, the support arm exhibits no axial or radial displacement during welding, avoiding defects such as uneven weld penetration, weld misalignment, and welding deformation caused by workpiece loosening, thus improving the welding strength and finished product qualification rate of the wind turbine stator support.

[0019] 5. An automatic welding device and welding method for a wind turbine stator support: The clamping plate of the first positioning mechanism achieves elastic clamping through a second spring. The clamping distance can be adjusted according to the outer diameter of the support arm. At the same time, the position of the limiting plate can be adapted to support arms of different lengths to meet the welding requirements of support arms of various specifications. Moreover, the inner support plate of the second positioning mechanism is driven to extend and retract by a screw. The extension distance can be freely adjusted according to the inner diameter of the support ring. Multiple inner support plates extend and retract synchronously to adapt to stator support rings of different inner diameters. The inner support force is uniform, ensuring that the correction effect is not affected by the size of the support ring. Furthermore, the slide rails on the bearing plate and the first positioning mechanism can be evenly arranged according to the number of support arms. With the synchronous drive of the pneumatic components, the welding of stator supports with two or more support arms of any number can be realized, adapting to the design requirements of stator supports of different power specifications of wind turbines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the bottom state structure of the present invention; Figure 3 This is a schematic diagram of the welding state structure of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram of part A in the diagram; Figure 5 This is a schematic cross-sectional view of the bearing disk structure of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of part B in the diagram; Figure 7 For the present invention Figure 5 A magnified structural diagram of part C in the diagram; Figure 8 This is a partial structural diagram of the slide rail and bearing plate of the present invention in their assembled state; Figure 9This is a schematic diagram of the first overall three-dimensional structure of the welding positioning mechanism of the present invention; Figure 10 This is a cross-sectional structural schematic diagram of the welding positioning mechanism of the present invention. Figure 11 This is a schematic diagram of the second integral three-dimensional structure of the welding positioning mechanism of the present invention; Figure 12 This is a schematic diagram of the first overall three-dimensional structure of the No. 2 welding positioning mechanism of the present invention; Figure 13 For the present invention Figure 12 A magnified structural diagram of part D in the diagram; Figure 14 This is a schematic diagram of the second integral three-dimensional structure of the No. 2 welding positioning mechanism of the present invention; Figure 15 This is a first cross-sectional view of the assembly state of the second lifting plate and the circular bearing plate of the present invention. Figure 16 This is a second cross-sectional view of the assembly state of the second lifting plate and the circular bearing plate of the present invention. Figure 17 This is a schematic diagram of the assembly state of the wind turbine stator support body and stator core of the present invention.

[0021] In the diagram: 1. Welding table; 2. Linear module; 3. Arc welding robot; 4. Bearing plate; 5. Slide rail; 6. Long slot; 7. Welding positioning mechanism No. 1; 71. Clamping sleeve; 72. Sliding sleeve; 73. Drive rod; 74. Push-pull rod; 75. First piston; 76. First spring; 77. Clamping plate; 78. Guide rod; 79. Second spring; 710. Wedge groove; 711. First lifting plate; 712. Third spring; 713. Drive arm; 714. Roller; 715. Limiting plate; 716. Cross-shaped long slide groove; 717. Pressure sensor switch; 718. Strong magnet; 719. Electromagnet; 8. Lifting groove; 9. Welding positioning mechanism No. 2 Mechanism; 91. Circular bearing plate; 92. Circular through hole; 93. Slide groove; 94. Screw; 95. Gear; 96. Inner support plate; 97. Second lifting plate; 98. Transmission rod; 99. Fourth spring; 910. Rack; 911. Limiting stop bar; 912. Pneumatic assembly; 9121. Air cylinder; 9122. Second piston; 9123. Piston rod; 9124. Fifth spring; 913. Guide groove; 914. Guide block; 915. Limiting ring; 10. Air chamber; 11. Gas passage; 12. Movable groove; 13. Fan stator support body; 131. Stator support ring; 132. Stator support arm; 14. Stator core; 15. Servo motor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides three technical solutions: an automatic welding device for wind turbine stator supports, specifically including the following embodiments: like Figures 1-3 , Figure 5 , Figure 8 , Figure 17 The first embodiment is shown: an automatic welding device for a wind turbine stator support, including a welding table 1, a platform disposed on one side of the welding table 1, and a wind turbine stator support body 13. The wind turbine stator support body 13 is connected by welding of a stator support ring 131 and a plurality of stator support arms 132. It also includes: The welding assembly includes a linear module 2 fixedly mounted on the top of the platform. The linear module 2 is equipped with an arc welding robot 3 for welding the stator support body 13 of the wind turbine. The linear module 2 can drive the arc welding robot 3 to slide along its outer wall to change its welding position. After the stator support body 13 of the wind turbine is installed inside the stator core 14, multiple stator support arms 132 are used to support multiple positions of the stator core 14 to ensure the stability of the stator core 14. The bearing plate 4 is rotatably mounted on the top of the welding table 1. Multiple slide rails 5 are evenly fixed on the top of the bearing plate 4. The top of the slide rail 5 is provided with a long strip-shaped through groove 6. A first welding positioning mechanism 7 is slidably sleeved on the outer wall of the slide rail 5 for correcting and clamping the welding position of the stator support arm 132 by its own weight. After the multiple stator support arms 132 are positioned and clamped, they are automatically assembled with the stator support ring 131 before welding. The lifting groove 8 is located at the top center of the bearing plate 4. The lifting groove 8 is equipped with a second welding positioning mechanism 9 for lifting the stator support arm 132 and automatically correcting and clamping the position of the stator support arm 132 before welding. Under the gravity of the stator support ring 131, the second welding positioning mechanism 9 automatically forms its top and the top of the bearing plate 4 at the same level. The power transmission assembly includes movable slots 12 evenly distributed on the top of the support plate 4, each corresponding to one of the positions of multiple first welding positioning mechanisms 7. Each movable slot 12 has a gas cavity 10 on its side wall. The gas cavity 10 is connected to the second welding positioning mechanism 9 via a gas channel 11 located inside the support plate 4. As the second welding positioning mechanism 9 moves downward, the power transmission assembly drives the multiple first welding positioning mechanisms 7 to move synchronously towards itself, thus completing the operation of the welding ends of the multiple stator support arms 132 abutting against the outer wall of the stator support ring 131. Each elongated through slot 6 is connected to the corresponding movable slot 12, and the corresponding drive rod 73 can slide simultaneously along the channel formed by the elongated through slot 6 and the movable slot 12.

[0024] In this embodiment, a servo motor 15 is fixedly installed at the bottom of the welding table 1. The output shaft of the servo motor 15 rotates through the welding table 1 and is fixedly connected to the bottom of the support plate 4 to drive the support plate 4 to rotate and switch welding positions. This works in conjunction with the arc welding robot 3 to complete the welding operation on the stator support arms 132 at multiple positions. A controller is also fixedly installed on one side of the outer wall of the welding table 1. This controller is used to control the servo motor 15 and the arc welding robot 3 to run according to the set program.

[0025] like Figure 4 , Figure 7 , Figures 9-11 The second embodiment is shown: the first welding positioning mechanism 7 includes a clamping sleeve 71 and a sliding sleeve 72 fixedly disposed at the bottom of the clamping sleeve 71. The sliding sleeve 72 is slidably sleeved on the outer wall of the slide rail 5. A drive rod 73 is fixedly disposed on the side wall of the clamping sleeve 71 and slidably disposed inside the movable groove 12. A push-pull rod 74 is fixedly disposed on the lower side wall of the drive rod 73 near the side wall of the clamping sleeve 71. A first piston 75 is fixedly disposed at the end of the push-pull rod 74 away from the drive rod 73 and slidably disposed in the air chamber 10 at the corresponding position. A first spring 76 is slidably sleeved on the outer wall of the push-pull rod 74 and located between the first piston 75 and the inner wall of the air chamber 10 at the corresponding position.

[0026] In this embodiment, the clamping sleeve 71 has a receiving groove on each of its inner walls. A clamping plate 77 is slidably disposed in each of the two receiving grooves. A guide rod 78 is fixedly disposed at each of the four corners of the outer wall of the clamping plate 77. The guide rod 78 slides through the outer wall of the clamping sleeve 71 and is fixedly disposed with a first spring baffle. A second spring 79 is slidably sleeved on the outer wall of the guide rod 78 and located between the first spring baffle and the outer wall of the clamping sleeve 71. A wedge-shaped groove 710 is provided in the middle of the side wall of the clamping plate 77 near the receiving groove.

[0027] In this embodiment, a first lifting plate 711 is movably disposed below the two clamping plates 77. A plurality of third springs 712 are uniformly fixed between the bottom of the first lifting plate 711 and the bottom of the inner cavity of the clamping sleeve 71. A drive arm 713 is symmetrically fixed on both sides of the outer wall of the first lifting plate 711. A roller 714 is also rotatably disposed on the side wall of the drive arm 713. The positions of the two rollers 714 correspond one-to-one with the positions of the two wedge grooves 710 on both sides. The two rollers 714 slide along the inclined inner wall of the wedge grooves 710 at the corresponding positions. A cross-shaped long slide groove 716 is opened on both sides of the top of the first lifting plate 711. A limiting plate 715 for limiting the position of the stator support arm 132 is slidably disposed in the two cross-shaped long slide grooves 716. The limiting plate 715 can be locked with the cross-shaped long slide groove 716 by bolts. Both sides of the bottom of the first lifting plate 711 are fixedly equipped with cross-shaped slider structures that are compatible with the cross-shaped long slide groove 716. The two cross-shaped sliders are respectively slidably arranged in the cross-shaped long slide groove 716 at corresponding positions. By continuously adjusting the position of the limiting plate 715 in the cross-shaped long slide groove 716, the length of the stator support arm 132 welding end extending out of the first welding positioning mechanism 7 can be limited, so as to ensure that after the stator support ring 131 can be stretched and clamped from the inside by multiple inner support plates 96, the welding end of the stator support arm 132 simultaneously abuts against the outer wall of the stator support ring 131. A first rubber protective pad is fixedly provided on the side wall of the clamping plate 77 to prevent scratching the stator support arm 132 to be welded.

[0028] In this embodiment, a powerful magnet 718 is fixedly installed at the bottom center of the first lifting plate 711. An installation groove is formed at the bottom of the inner cavity of the clamping sleeve 71 opposite to the powerful magnet 718, and an electromagnet 719 is fixedly installed in this groove. A pressure-sensitive switch 717 for controlling the current flow in the circuit containing the electromagnet 719 is also fixedly installed on the side wall of the limiting plate 715 near the drive rod 73. The compressive force generated when the end of the stator support arm 132 abuts against the outer wall of the stator support ring 131 is transmitted through the stator support arm 132 to the pressure-sensitive switch 717. The magnetic force generated by the energization of the circuit containing the electromagnet 719 attracts the powerful magnet 718 downwards, further pulling the first lifting plate 711 downwards. The two clamping plates 77 further clamp the stator support arm 132. A manual switch for controlling the circuit flow of the electromagnet 719 is also provided on the outer wall of the welding table 1. The electromagnet 719 is electrically connected to the power supply module on the welding table 1 via a wire, and the pressure-sensitive switch 717 is connected in series in this power supply circuit.

[0029] like Figure 6 , Figures 12-16A third embodiment is shown: The second welding positioning mechanism 9 includes a circular support plate 91 slidably disposed inside the lifting groove 8 and a circular through hole 92 opened at the middle of the top of the circular support plate 91. Multiple sliding grooves 93 are evenly distributed on the top of the circular support plate 91. A screw 94 is rotatably disposed inside each sliding groove 93, passing through the sliding groove 93 and extending into the interior of the circular through hole 92. A gear 95 is fixedly disposed at one end of the screw 94 inside the circular through hole 92. An inner support plate 96 is threadedly fitted onto the outer wall of the screw 94, and the inner support plate 96 is slidably disposed within the corresponding sliding groove 93. A second rubber protective pad is fixedly disposed on the outer wall of the inner support plate 96 to prevent damage to the inner wall of the stator support ring 131. In the initial state, the multiple inner support plates 96 are retracted into the corresponding sliding grooves 93, and the circumferential diameter formed by their outer sides is smaller than the inner diameter of the stator support ring 131, facilitating the fitting of the stator support ring 131.

[0030] In this embodiment, a second lifting plate 97 is slidably disposed inside the circular through hole 92. A transmission rod 98 is fixedly disposed at the bottom of the second lifting plate 97. A plurality of guide grooves 913 are evenly opened on the inner wall of the circular through hole 92. A guide slider 914 is slidably disposed in each guide groove 913. All guide sliders 914 are fixedly disposed on the outer wall of the second lifting plate 97. The guide sliders 914 can move up and down synchronously with the second lifting plate 97 and restrict the second lifting plate 97 to move only in the vertical direction. A limiting ring 915 is fixedly disposed on the inner wall of the circular through hole 92 below the second lifting plate 97 to limit the descent height of the second lifting plate 97. The limiting ring 915 can ensure that the second lifting plate 97 descends to the top of the limiting ring 915. When the parts abut, the rack 910 still meshes with the gear 95 at the corresponding position. The bottom end of the transmission rod 98 is also fixedly provided with a second spring baffle that abuts against the bottom of the lifting groove 8. A fourth spring 99 is slidably sleeved on the outer wall of the transmission rod 98 between the second spring baffle and the bottom of the circular support plate 91. The top of the second lifting plate 97 is uniformly fixedly provided with racks 910 that correspond one-to-one with the positions of multiple gears 95. Each rack 910 meshes with the gear 95 at the corresponding position. The bottom sides of the lifting groove 8 are also fixedly provided with limiting stops 911 for limiting the descent height of the circular support plate 91. When the bottom of the circular support plate 91 abuts against the top of the limiting stops 911, the top of the circular support plate 91 and the top of the support plate 4 are on the same plane.

[0031] In this embodiment, pneumatic components 912 are evenly arranged at the bottom of the circular support plate 91, corresponding one-to-one with the positions of multiple welding positioning mechanisms 7. The multiple pneumatic components 912 are used to input the air inside themselves into the air chamber 10 at the corresponding position when the circular support plate 91 moves down. The pneumatic components 912 include an air cylinder 9121 fixedly arranged at the bottom of the lifting groove 8. A second piston 9122 is slidably arranged inside the air cylinder 9121. A piston rod 9123 is fixedly arranged at the top of the second piston 9122. The piston rod 9123 slides through the air cylinder 9121 and is fixedly arranged at the bottom of the circular support plate 91. A fifth spring 9124 is slidably sleeved on the outer wall of the piston rod 9123 and located between the air cylinder 9121 and the circular support plate 91. An exhaust port is opened at the bottom of the air cylinder 9121, and the exhaust port is connected to the gas channel 11 at the corresponding position.

[0032] This invention also provides an automatic welding method for wind turbine stator supports, using automatic welding equipment for wind turbine stator supports, and the method includes the following steps: Step 1: The stator support arm 132 to be welded is hoisted into the designated position in multiple No. 1 welding positioning mechanisms 7 by a crane in sequence. The No. 1 welding positioning mechanism 7 is driven by the weight of the stator support arm 132 to complete the initial position correction and clamping operation. Step 2: Then, the stator support ring 131 is hoisted to the top center of the second welding positioning mechanism 9. The gravity of the stator support ring 131 pushes the second welding positioning mechanism 9 to move down along the inner wall of the lifting groove 8 until the top of the second welding positioning mechanism 9 and the top surface of the bearing plate 4 are on the same horizontal plane. During this process, the position of the second welding positioning mechanism 9 is automatically corrected and locked. At the same time, multiple first welding positioning mechanisms 7 are driven by the downward movement force of the second welding positioning mechanism 9 to move synchronously towards the center of the bearing plate 4 until the ends of multiple stator support arms 132 to be welded abut against the outer wall of the stator support ring 131. Step 3: The arc welding robot 3 welds the connection position of one of the stator support arms 132 and the stator support ring 131 according to the control command. After the welding operation at this position is completed, the bearing plate 4 rotates at a preset angle according to the set program to perform the welding operation again. This process is repeated until the welding is completed. Then the entire fan stator support body 13 is removed from the bearing plate 4.

[0033] In use, the stator support arm 132 to be welded is first hoisted and placed on top of the first lifting plate 711, with its welding end facing the outside of the clamping sleeve 71, and the end of the stator support arm 132 away from the welding end facing the limiting plate 715. The weight of the stator support arm 132 presses down on the first lifting plate 711 and moves it downward. When the first lifting plate 711 moves downward, it simultaneously drives the drive arms 713 on both sides to move downward. The roller 714 slides along the wedge surface inside the wedge groove 710, pushing the clamping plates 77 on both sides to move towards each other until the side wall of the clamping plate 77 contacts the outer wall of the stator support arm 132, and gradually pushes the stator support arm 132 closer to the top middle position of the first lifting plate 711. The second spring 79 is compressed and undergoes elastic deformation to complete the initial correction and clamping operation of the placement position of the stator support arm 132.

[0034] Next, the stator support ring 131 is hoisted to the top of the circular support plate 91. The internal cavity of the stator support ring 131 is fitted onto the outside of multiple inner support plates 96. After the stator support ring 131 is completely placed on top of the circular support plate 91, the gravity of the stator support ring 131 pushes the circular support plate 91 down along the inner wall of the lifting groove 8. At this time, the circular support plate 91 continues to move down, and the bottom end of the transmission rod 98 abuts against the bottom of the lifting groove 8 and is pushed upward by the bottom of the lifting groove 8. Thus, the second lifting plate 97 moves upward synchronously, and multiple racks 910 drive the corresponding positions. As the gear 95 rotates, the screw 94, along with the gear 95, drives the inner support plate 96 at the corresponding position to slide along the inner wall of the slide groove 93 away from the center of the circular through hole 92. The outer walls of the multiple inner support plates 96 abut against the inner wall of the stator support ring 131 and simultaneously push the stator support ring 131 to move in multiple directions, so that the axis of the stator support ring 131 gradually moves towards the axis of the circular bearing plate 91, ultimately making the stator support ring 131 and the circular bearing plate 91 coaxial, thus completing the correction of the position of the stator support ring 131 and the internal clamping operation.

[0035] As the circular support plate 91 moves downward along the inner wall of the lifting groove 8, it pushes the piston rod 9123 downward. Multiple second pistons 9122 at various positions compress the air inside the corresponding air cylinder 9121, outputting it through the corresponding gas channel 11 and inputting it into the corresponding air chamber 10. The first piston 75 inside the air chamber 10 is pushed towards the movable groove 12 by the high-pressure gas, causing multiple drive rods 73 at various positions to simultaneously pull the corresponding clamping sleeve 71 closer to the center of the circular support plate 91. The sliding sleeve 72 slides along the outer wall of the slide rail 5 at this position, and the drive rod 73 slides along the movable groove 12 at the corresponding position until the welded end of the stator support arm 132 located inside the clamping sleeve 71 abuts against the outer wall of the stator support ring 131, and pushes the stator support arm 132 to move towards the limiting plate 715, correcting the position in this direction until one end of the stator support arm 132 abuts tightly against the side wall of the limiting plate 715. At this time, the bottom of the circular bearing plate 91 abuts against the top of the limiting stop 911, and the top of the circular bearing plate 91 and the top of the bearing plate 4 are on the same horizontal plane.

[0036] When one end of the stator support arm 132 abuts against the side wall of the limiting plate 715 and generates a squeezing force, the pressure sensing switch located on the side wall of the limiting plate 715 is triggered by the squeezing of the stator support arm 132. The circuit of the electromagnet 719 is connected. After the electromagnet 719 is energized, it generates a magnetic force. The magnetic force attracts the strong magnet 718 downward, causing the first lifting plate 711 to be pulled downward by the magnetic force. While the first lifting plate 711 moves downward a small distance again, the clamping plates 77 on both sides further clamp the stator support arm 132, completing the further correction and stable clamping of the position of the stator support arm 132.

[0037] The controller controls the arc welding robot 3 to weld the connection end face of one of the stator support arms 132 and the stator support ring 131 according to the preset program. After completing one weld, the servo motor 15 rotates at a preset angle according to the control command, and the arc welding robot 3 performs the welding operation on the welding surface again.

[0038] After all welding is completed, the power supply to the circuit containing the electromagnet 719 is cut off by a manual switch. Then, the entire stator support body 13 of the wind turbine is slowly lifted upwards by a crane. After the pressure is gradually released from the top of the first lifting plate 711 and the second welding positioning mechanism 9, the first lifting plate 711 moves upwards under the elastic force of multiple third springs 712, while the clamping plates 77 on both sides are gradually reset under the elastic force of the second springs 79, releasing the clamping on the stator support arm 132. The circular bearing plate 91 moves upwards and resets under the elastic force of the piston rods 9123 at multiple positions. The multiple inner support plates 96 release the clamping effect on the inner wall of the stator support ring 131, and the wind turbine stator support body 13 can be disassembled from the welding station.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for a wind turbine stator support, comprising a welding table, a platform disposed on one side of the welding table, and a wind turbine stator support body, wherein the wind turbine stator support body is composed of a stator support ring and multiple stator support arms connected by welding, characterized in that, Also includes: The welding assembly includes a linear module fixedly mounted on the top of a platform, and an arc welding robot for welding the stator support body of a wind turbine is mounted on the top of the linear module. The linear module can drive the arc welding robot to slide along its outer wall to change its welding position. The support plate is rotatably mounted on the top of the welding table. Multiple slide rails are evenly fixed on the top of the support plate. The top of the slide rails is provided with long strip-shaped through grooves. A No. 1 welding positioning mechanism is slidably sleeved on the outer wall of the slide rails for correcting and clamping the welding position of the stator support arm by its own weight. After the multiple stator support arms are positioned and clamped, they are automatically assembled with the stator support ring before welding. The lifting groove is located at the top center of the bearing plate. Inside the lifting groove, there is a second welding positioning mechanism for supporting the stator support arm and automatically correcting and clamping the position of the stator support arm before welding. Under the gravity of the stator support ring, the second welding positioning mechanism automatically forms its top and the top of the bearing plate at the same level.

2. The automatic welding equipment for wind turbine stator supports according to claim 1, characterized in that: It also includes a power transmission assembly, which includes movable slots evenly distributed on the top of the bearing plate and corresponding one-to-one with the positions of multiple first welding positioning mechanisms. Each movable slot also has an air chamber on its side wall. The air chamber is connected to the second welding positioning mechanism through a gas channel, which is located inside the bearing plate. When the second welding positioning mechanism moves down, the power transmission assembly drives multiple first welding positioning mechanisms to move towards itself synchronously, so as to complete the operation of pressing the welding ends of multiple stator support arms against the outer wall of the stator support ring. The first welding positioning mechanism includes a clamping sleeve and a sliding sleeve fixedly disposed at the bottom of the clamping sleeve. The sliding sleeve is slidably disposed on the outer wall of the slide rail. A drive rod is fixedly disposed on the side wall of the clamping sleeve and slidably disposed inside the movable groove. A push-pull rod is fixedly disposed on the lower side wall of the drive rod near the clamping sleeve. A first piston is fixedly disposed at the end of the push-pull rod away from the drive rod and slidably disposed in the air chamber at the corresponding position. A first spring is slidably disposed on the outer wall of the push-pull rod between the first piston and the inner wall of the air chamber at the corresponding position.

3. The automatic welding equipment for wind turbine stator supports according to claim 2, characterized in that: Each of the two inner walls of the clamping sleeve is provided with a receiving groove, and a clamping plate is slidably disposed in each of the two receiving grooves. A guide rod is fixedly disposed at each of the four corners of the outer wall of the clamping plate. The guide rod slides through the outer wall of the clamping sleeve and is fixedly disposed with a first spring baffle. A second spring is slidably disposed on the outer wall of the guide rod and between the first spring baffle and the outer wall of the clamping sleeve. A wedge-shaped groove is provided in the middle of the side wall of the clamping plate near the receiving groove. A first lifting plate is movably disposed below the two clamping plates. Multiple third springs are uniformly fixed between the bottom of the first lifting plate and the bottom of the inner cavity of the clamping sleeve. Drive arms are symmetrically fixed on both sides of the outer wall of the first lifting plate. Rollers are rotatably disposed on the side wall of the drive arms. The positions of the two rollers correspond one-to-one with the positions of the wedge grooves on both sides. The two rollers slide along the inclined inner wall of the wedge grooves at their respective positions. Cross-shaped long slide grooves are opened on both sides of the top of the first lifting plate. A limiting plate for limiting the position of the stator support arm is slidably disposed in the two cross-shaped long slide grooves. The limiting plate can be locked to the cross-shaped long slide grooves by bolts.

4. An automatic welding device for a wind turbine stator support according to claim 1, characterized in that: The second welding positioning mechanism includes a circular support plate slidably disposed inside the lifting groove and a circular through hole opened at the middle position of the top of the circular support plate. The top of the circular support plate is evenly provided with multiple sliding grooves. A screw is rotatably disposed inside each sliding groove. The screw rotates through the sliding groove and extends into the interior of the circular through hole. A gear is fixedly disposed at one end of the screw located inside the circular through hole. An inner support plate is also threaded on the outer wall of the screw. The inner support plate is slidably disposed in the sliding groove at the corresponding position.

5. An automatic welding device for a wind turbine stator support according to claim 4, characterized in that: A second lifting plate is slidably disposed inside the circular through hole, and multiple guide grooves are evenly opened on the inner wall of the circular through hole. A guide slider is slidably disposed in each guide groove. All guide sliders are fixedly disposed on the outer wall of the second lifting plate. A limiting ring for limiting the descent height of the second lifting plate is fixedly disposed on the inner wall of the circular through hole below the second lifting plate. A transmission rod is fixedly disposed at the bottom of the second lifting plate. A second spring baffle that abuts against the bottom of the lifting groove is also fixedly disposed at the bottom end of the transmission rod. A fourth spring is slidably sleeved on the outer wall of the transmission rod between the second spring baffle and the bottom of the circular support plate. A rack corresponding to the positions of multiple gears is evenly fixedly disposed on the top of the second lifting plate. Each rack is meshed with the gear at the corresponding position. Limiting stops for limiting the descent height of the circular support plate are also fixedly disposed on both sides of the bottom of the lifting groove. When the bottom of the circular support plate abuts against the top of the limiting stops, the top of the circular support plate and the top of the support plate are on the same plane.

6. An automatic welding device for a wind turbine stator support according to claim 5, characterized in that: The bottom of the circular support plate is also uniformly provided with pneumatic components that correspond one-to-one with the positions of multiple No. 1 welding positioning mechanisms. The multiple pneumatic components are used to input the air inside themselves into the air chamber at the corresponding position when the circular support plate moves down. The pneumatic components include an air cylinder fixedly installed at the bottom of the lifting groove. A second piston is slidably installed inside the air cylinder. A piston rod is fixedly installed on the top of the second piston. The piston rod slides through the air cylinder and is fixedly installed at the bottom of the circular support plate. A fifth spring is slidably sleeved on the outer wall of the piston rod between the air cylinder and the circular support plate. An exhaust port is opened at the bottom of the air cylinder, and the exhaust port is connected to the gas channel at the corresponding position.

7. An automatic welding device for a wind turbine stator support according to claim 1, characterized in that: A servo motor is fixedly installed at the bottom of the welding station. The output shaft of the servo motor rotates through the welding station and is fixedly connected to the bottom of the support plate to drive the support plate to rotate and switch welding positions. It works with the arc welding robot to complete the welding operation on the stator support arm at multiple positions. A controller is also fixedly installed on one side of the outer wall of the welding station. The controller is used to control the servo motor and the arc welding robot to run according to the set program.

8. An automatic welding device for a wind turbine stator support according to claim 3, characterized in that: A powerful magnet is fixedly installed at the bottom center of the first lifting plate. An installation groove is provided at the bottom of the clamping sleeve opposite to the powerful magnet. An electromagnet is fixedly installed in the installation groove. A pressure sensing switch for controlling the current of the electromagnet circuit is also fixedly installed on the side wall of the limiting plate near the drive rod. The squeezing force generated when the end of the stator support arm and the outer wall of the stator support ring abut against each other is transmitted to the pressure sensing switch through the stator support arm. The magnetic force generated by the energization of the electromagnet circuit attracts the powerful magnet downwards, so as to further pull the first lifting plate downwards. The two clamping plates further clamp the stator support arm. A manual switch for controlling the electromagnet circuit is also provided on the outer wall of the welding station.

9. An automatic welding method for wind turbine stator supports, employing the automatic welding equipment for wind turbine stator supports as described in any one of claims 1-8, characterized in that: The method includes the following steps: Step 1: Use a crane to hoist the stator support arm to be welded into the designated position in multiple No. 1 welding positioning mechanisms in sequence. Use the weight of the stator support arm itself to drive the No. 1 welding positioning mechanism to complete the initial position correction and clamping operation. Step 2: Then, the stator support ring is hoisted to the top center of the No. 2 welding positioning mechanism. The gravity of the stator support ring pushes the No. 2 welding positioning mechanism to move down along the inner wall of the lifting groove until the top of the No. 2 welding positioning mechanism and the top surface of the bearing plate are on the same horizontal plane. During this process, the position of the No. 2 welding positioning mechanism is automatically corrected and locked. At the same time, multiple No. 1 welding positioning mechanisms are driven by the downward movement force of the No. 2 welding positioning mechanism to move synchronously towards the center of the bearing plate until the ends of multiple stator support arms to be welded abut against the outer wall of the stator support ring. Step 3: The arc welding robot performs welding on the connection position of one of the stator support arms and the stator support ring according to the control instructions. After completing the welding operation at this position, the carrier plate rotates at a preset angle according to the set program to perform the welding operation again. This process is repeated until the welding is completed, and then the entire wind turbine stator support body is removed from the carrier plate.

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