A wind turbine generator rotor welding device

Abstract

The application discloses a wind power generator rotor welding device, relates to the technical field of submerged arc welding, and comprises a welding frame and an assembling tool, a welding groove is formed in the middle of the welding frame, and a submerged arc welding machine is slidably arranged in the welding groove. The wind power generator rotor welding device adjusts the first workpiece to the optimal "boat-shaped" state through the roller frame and then performs welding, after the first submerged arc welding is completed, the second submerged arc welding is continuously performed, the preheating temperature of the weld is maintained, the first weld is tempered at the same time, the heat input of each weld is balanced through the cooperation of the submerged arc welding machine, the cracking of the positioning weld is prevented, the welding quality is effectively improved, and the welding efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submerged arc welding, in particular to a wind power generator rotor welding device. BACKGROUND

[0002] In recent years, wind power generation technology has developed rapidly, and wind turbine units are getting larger and larger, and the power of the generator is gradually increasing, and the welding requirements for the generator rotor are also getting higher and higher. The wind power generator rotor includes a wind power generator rotor shaft, and a plurality of rib plates are arranged on the body of the wind power generator rotor shaft, and the number of rib plates is usually 6. With the continuous improvement of technical requirements, the position degree of the two sides of the six rib plates of the wind power generator rotor is increased from 2.5mm to 1.5mm. Previously, the position degree of the rib plate end was measured several times during the submerged arc welding process to adjust the welding sequence to control the deformation of the rib plate. Even so, most of the rotors after welding still need to be corrected by flame correction or mechanical pressing. Moreover, there is no efficient assembly tool during the rib plate assembly process, and repeated measurement and positioning assembly are required, which is low in assembly efficiency, the preheating temperature cannot be maintained, and the positioning weld often cracks, the welding efficiency is low, and the weld quality cannot be guaranteed.

[0003] Therefore, it is necessary to introduce a wind power generator rotor welding device to improve the weld quality and welding efficiency. SUMMARY

[0004] The purpose of the present application is to provide a wind power generator rotor welding device to solve the technical problems of low rib plate assembly efficiency and unguaranteed welding quality.

[0005] To solve the above technical problems, the application specifically provides the following technical scheme: a wind power generator rotor welding device, which comprises a welding frame and an assembly tooling for assembling a second workpiece and a plurality of first workpieces, the second workpiece being a wind power generator rotor rotating shaft, and the first workpieces being rib plates installed on the body of the wind power generator rotor rotating shaft; a movable submerged arc welding machine is installed on the welding frame, a welding groove is formed in the middle of the welding frame, the welding gun of the submerged arc welding machine is located in the welding groove, a recycling box with an opening facing upward is arranged below the welding frame, a supporting box and an electric push rod are arranged at both ends of the recycling box, a liftable roller frame is arranged in the supporting box, a back-shaped frame is fixedly installed at both ends of the recycling box, a T-shaped frame is liftable and slidably installed in each back-shaped frame, the output end of each electric push rod is fixedly connected with the T-shaped frame on the same side, each T-shaped frame is fixedly connected with the roller frame at the same end, a sliding groove for the lifting movement of the T-shaped frame is formed at one side of each supporting box, a cooling plate and a preheating plate are jointly and slidably installed in the two T-shaped frames, the cooling plate and the preheating plate are symmetrically arranged about the central axis of the T-shaped frame, the cooling plate is provided with a cooling device for cooling the welding position, and the preheating plate is provided with a preheating device for heating the welding position; and an adjusting assembly for adjusting the distance between the cooling plate and the preheating plate is arranged on each T-shaped frame.

[0006] Further, the wind power generator rotor welding device, wherein the assembly tooling comprises: a pair of assembly discs, a through hole is arranged in the middle of each assembly disc, an assembly sleeve is arranged on the outer side of each assembly disc and communicates with the through hole, the assembly sleeve is coaxial with the corresponding through hole, a plurality of assembly clamping grooves are arranged on the inner side of each assembly disc, all the assembly clamping grooves on each assembly disc are arranged around the through hole and are arranged along the radial direction of the assembly disc; the two assembly discs are clamped and blocked at the positions of the two ends of the second workpiece, the assembly sleeves are coaxial with the second workpiece, and the assembly sleeves and the body of the second workpiece are fixed by adjusting bolts, the two ends of each first workpiece are clamped in the assembly clamping grooves of the pair of assembly discs, all the first workpieces are uniformly and spacedly arranged around the circumference of the second workpiece, and the plate body of each first workpiece is arranged along the radial direction of the second workpiece; and the two roller frames are supported at the two ends of the second workpiece.

[0007] Further, the wind power generator rotor welding device, wherein each of the U-shaped frame is fixedly installed with a first rack on one side; each of the adjusting assembly comprises a rotating shaft, a first gear, a second gear, a second rack and a third rack, the first gear is coaxially fixedly installed on one end of the rotating shaft, the second gear is coaxially fixedly installed on the other end of the rotating shaft, the second rack is fixedly installed on the upper portion of the cooling plate, the third rack is fixedly installed on the lower portion of the preheating plate, the second rack and the third rack are located above and below the T-shaped frame respectively, the rotating shaft is located on one side of the U-shaped frame, one end of the rotating shaft, on which the second gear is installed, extends into the T-shaped frame, the first gear is engaged with the first rack, and the second gear is engaged with the second rack and the third rack simultaneously.

[0008] Further, the wind power generator rotor welding device, wherein the cooling device comprises a first screw rod rotatably connected in the cooling plate, a first motor fixedly installed on one end of the cooling plate, and an output end of the first motor penetrating through the cooling plate and coaxially fixedly connected with the first screw rod, a first sliding block threadedly connected on the first screw rod and slidably connected with the inside of the cooling plate, and a wind cooling gun fixedly installed on the first sliding block and used for releasing cold air to the second workpiece.

[0009] Further, the wind power generator rotor welding device, wherein the cooling device comprises a first screw rod rotatably connected in the cooling plate, a first motor fixedly installed on one end of the cooling plate, and an output end of the first motor penetrating through the cooling plate and coaxially fixedly connected with the first screw rod, a first sliding block threadedly connected on the first screw rod and slidably connected with the inside of the cooling plate, and a wind cooling gun fixedly installed on the first sliding block and used for releasing cold air to the second workpiece.

[0010] Further, the wind power generator rotor welding device, wherein the preheating device comprises a second screw rod rotatably connected in the preheating plate, a second motor fixedly installed on one end of the preheating plate, and an output end of the second motor penetrating through the preheating plate and coaxially fixedly connected with the second screw rod, a second sliding block threadedly connected on the second screw rod and slidably connected with the inside of the preheating plate, and a preheating gun fixedly installed on the second sliding block and used for releasing flame to the second workpiece.

[0011] Further, the wind power generator rotor welding device, wherein the preheating device comprises a second screw rod rotatably connected in the preheating plate, a second motor fixedly installed on one end of the preheating plate, and an output end of the second motor penetrating through the preheating plate and coaxially fixedly connected with the second screw rod, a second sliding block threadedly connected on the second screw rod and slidably connected with the inside of the preheating plate, and a preheating gun fixedly installed on the second sliding block and used for releasing flame to the second workpiece.

[0012] Further, the wind power generator rotor welding device, wherein the upper end of the recycling box is provided with a filter screen.

[0013] Further, the wind power generator rotor welding device, wherein the spring is arranged between the roller frame and the supporting box.

[0014] Compared with the prior art, the wind power generator rotor welding device has the following advantages:

[0015] One, the setting of the roller frame in the wind turbine generator rotor welding device greatly facilitates the welding operation and the welding position adjustment, the first workpiece is adjusted to the optimal "boat shape" state for welding through the roller frame, after the first arc welding is completed, the second arc welding is carried out without interruption, which not only maintains the preheating temperature of the weld, but also performs tempering treatment on the first weld, and cooperates with the arc welding machine, so that the heat input of each weld is very balanced, which can greatly improve the welding efficiency and effectively improve the welding quality, and can prevent the cracking of the positioning weld. During the whole welding process, the welding position sequence can be conveniently adjusted to reduce the welding stress and welding deformation, thereby further greatly improving the welding quality and welding efficiency.

[0016] Two, the fixing effect of the assembly tool can improve the assembly efficiency between the first workpiece, i.e. the rib plate, and the second workpiece, i.e. the wind turbine generator rotor, and can realize precise control of the position of the first workpiece, i.e. the rib plate, after welding, thereby greatly improving the welding quality.

[0017] Three, the cooperation structure of the first rack, the rotating shaft in the adjusting assembly, the first gear, the second gear, the second rack and the third rack, etc. can realize synchronous adjustment of the distance between the cooling plate and the preheating plate and the support height of the second workpiece when the electric push rod is lifted and driven, which is simple and ingenious, so as to realize the processing and manufacturing of wind turbine generators of different sizes.

[0018] Four, the cooling device and the preheating device respectively arranged on the cooling plate and the preheating plate can meet the required temperature during welding, thereby greatly improving the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can obtain other implementation drawings according to the provided drawings without creating any creative labor.

[0020] Figure 1 The structure diagram of the wind turbine generator rotor welding device without the recycling box;

[0021] Figure 2 The structure diagram of the recycling box in the wind turbine generator rotor welding device;

[0022] Figure 3 The structure diagram of the supporting box in the wind turbine generator rotor welding device;

[0023] Figure 4 Figure 5 is a side view of the wind turbine generator rotor welding device according to the present application;

[0024] Figure 5 Figure 6 is a structural schematic view of the adjusting assembly in the wind turbine generator rotor welding device according to the present application;

[0025] Figure 6 Figure 7 is a structural schematic view of the first workpiece and the second workpiece according to the present application; Figure 5 Figure 8 is an enlarged view of part A in Figure 7;

[0026] Figure 7 Figure 9 is a structural schematic view of the back-shaped frame in the wind turbine generator rotor welding device according to the present application;

[0027] Figure 8 Figure 10 is a structural schematic view of the assembly disc in the wind turbine generator rotor welding device according to the present application; Figure 7 Figure 11 is an enlarged view of part B in Figure 10;

[0028] Figure 9 Figure 12 is a structural schematic view of the first workpiece and the second workpiece according to the present application;

[0029] Figure 10 Figure 13 is a structural schematic view of the assembly disc in the wind turbine generator rotor welding device according to the present application.

[0030] The reference signs in the figures respectively represent the following:

[0031] 1, first workpiece; 2, second workpiece; 3, welding frame; 4, submerged arc welding machine; 5, recovery box; 6, bearing box; 7, electric push rod; 8, roller frame; 9, spring; 10, back-shaped frame; 11, first rack; 12, T-shaped frame; 13, assembly tool; 131, assembly disc; 132, assembly sleeve; 133, assembly clamping groove; 134, assembly disc through hole; 20, adjusting assembly; 21, rotating shaft; 22, first gear; 23, second gear; 24, second rack; 25, third rack; 30, cooling plate; 31, first screw rod; 32, first motor; 33, first sliding block; 34, air cooling gun; 40, preheating plate; 41, second screw rod; 42, second motor; 43, second sliding block; 44, preheating gun; 51, filter screen. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The concepts involved in the present application will be described below in combination with the drawings. It should be noted that the following description of the concepts is only for the purpose of making the content of the present application easier to understand, and does not represent a limitation on the scope of protection of the present application; meanwhile, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] As shown in Figures 1 to 10 The present application provides a welding device for a wind power generator rotor, which comprises a welding frame 3 and an assembly tool 13 for assembling a second workpiece 2 and a plurality of first workpieces 1. The second workpiece 2 is a rotor shaft of the wind power generator rotor, and the first workpieces 1 are rib plates installed on the body of the rotor shaft of the wind power generator rotor.

[0035] The welding frame 3 is provided with a submerged arc welding machine 4 movably installed thereon. A welding groove is formed in the middle of the welding frame 3, and the welding torch of the submerged arc welding machine 4 is located in the welding groove. A recycling box 5 with an opening facing upward is arranged below the welding frame 3. The recycling box 5 is provided with a supporting box 6 and an electric push rod 7 at each end. The supporting box 6 is provided with a roller frame 8 capable of lifting and moving. A spring 9 is arranged between the roller frame 8 and the supporting box 6. A back-shaped frame 10 is fixedly installed at each end of the recycling box 5. A T-shaped frame 12 capable of lifting and sliding is installed in each back-shaped frame 10. The output end of each electric push rod 7 is fixedly connected with the T-shaped frame 12 on the same side. One end of each T-shaped frame 12 is fixedly connected with the roller frame 8 on the same end. A sliding groove for lifting and moving the T-shaped frame 12 is formed in one side of each supporting box 6. A cooling plate 30 and a preheating plate 40 are jointly and slidably installed in the two T-shaped frames 12. The cooling plate 30 and the preheating plate 40 are symmetrically arranged about the central axis of the T-shaped frame 12. The cooling plate 30 is provided with a cooling device for cooling the welding position. The preheating plate 40 is provided with a preheating device for heating the welding position. An adjusting assembly 20 for adjusting the distance between the cooling plate 30 and the preheating plate 40 is arranged on each T-shaped frame 12.

[0036] The assembly tool 13 in this embodiment comprises: a pair of assembly discs 131, each of which is provided with an assembly disc through hole 134 in the center, and each of which is provided with an assembly sleeve 132 on the outer side in communication with the assembly disc through hole 134, each of which is coaxial with the corresponding assembly disc through hole 134, and each of which is provided with a plurality of assembly clamping grooves 133 on the inner side, all of which are arranged around the assembly disc through hole 134 and each of which is arranged along the radial direction of the assembly disc 131; a pair of assembly discs 131 are clamped on the two end positions of the second workpiece 2, and a pair of assembly sleeves 132 are coaxial with the second workpiece 2, and the assembly sleeve 132 and the body of the second workpiece 2 are fixed by adjusting bolts, and the two ends of each first workpiece 1 are clamped in the assembly clamping grooves 133 of a pair of assembly discs 131, all of the first workpieces 1 are arranged uniformly around the circumference of the second workpiece 2, and the plate body of each first workpiece 1 is arranged along the radial direction of the second workpiece 2; two roller supports 8 are respectively supported on the two ends of the second workpiece 2.

[0037] Before welding, the second workpiece 2 is placed on the two roller supports 8, and a plurality of first workpieces 1 are arranged uniformly around the circumference of the second workpiece 2 by using the assembly tool 13, and the assembly tool 13 is coaxially arranged with the second workpiece 2 by adjusting the adjusting bolts. The distance between the two assembly discs 131 meets the length requirement of the first workpiece 1. The assembly tool 13 has strong rigidity and can effectively control the position of the two ends of the first workpiece 1 during the assembly stage. The second workpiece 2 can rotate on the roller support 8 during submerged arc welding, which greatly facilitates the adjustment of the welding position. As shown in the figure, the first workpiece 1 is adjusted to the best "boat-shaped" state, that is: the two adjacent first workpieces 1 are symmetrically located on the two sides of the welding gun of the submerged arc welding machine 4, and the two first workpieces 1 and the second workpiece 2 form a "U" shaped structure with the opening outward in the cross section, and welding is carried out in this state. Figure 4

[0038] Specifically, in the process of gas shielded welding and submerged arc welding of, for example, a rotor shaft or a circular pipe or other similar structures, the structure and positional relationship of the first workpiece 1 to be welded and the second workpiece 2 can be referred to in conjunction with Figure 1 and Figure 4 ​For example, the first workpiece 1 is made of Q355D material with a thickness of 50 mm. Q355D is a kind of low-alloy high-strength structural steel, which belongs to the steel grade specified in Chinese national standard GB / T1591-2018. The shaft welding part of the second workpiece 2 is about 530 mm in diameter. The end of the first workpiece 1 is machined with a 10*45° groove structure, so that the first workpiece 1 and the second workpiece 2 form a circular arc end face together and are angle welded. Lincoln V-71 is used as carbon dioxide gas shielded flux-cored wire, which is made of carbon steel material with a wire diameter of 1.0 mm. Lincoln V-71 meets the specification for carbon steel flux-cored wire arc welding electrodes and is used for welding medium-strength steel. The protective gas is carbon dioxide gas with a purity of 99.95%, and centralized gas supply is adopted. The preheating temperature before welding is >70℃, the welding current is set to 270A (actually 267A), and the voltage is set to 28V. The length of the positioning weld is required to be ≥75 mm, and the spacing between the positioning welds is required to be about 250 mm. Then, each first workpiece 1 is first welded at a fixed point, and then the welding points are connected to form a backing weld, so that the welding effect is better and there is no surface crack.

[0039] The above-mentioned weld between the first workpiece 1 and the second workpiece 2 usually needs to be welded in two passes. After the first pass of submerged arc welding is completed, each first workpiece 1 and the second workpiece 2 are continuously welded in the second pass of submerged arc welding, which not only maintains the preheating temperature of the weld, but also performs tempering treatment on the first pass of weld. The submerged arc welding machine 4 adopts digital signal control parameters, and the human factor is small, so that the heat input of each pass of weld is very balanced, preventing the cracking that often occurs during positioning welding. During the welding process, the second workpiece 2 is rotated under the support of the roller frame 8, so that each first workpiece 1 that needs to be welded is located at one side of the welding gun of the submerged arc welding machine 4 at the "boat-shaped" position, and then welding is performed. Then, the second workpiece 2 is rotated to move another first workpiece 1 in the diameter direction of the first workpiece 1 that has been welded to the side of the welding gun of the submerged arc welding machine 4 at the "boat-shaped" position, and then the first workpiece 1 is welded, which can effectively reduce the welding residual stress. Under the action of a pair of assembly discs 131, the welding position of the first workpiece 1 can be precisely controlled.

[0040] Specifically, the first rack 11 is fixedly installed on one side of each of the L-shaped frame 10. Each of the adjusting assemblies 20 comprises a rotating shaft 21, a first gear 22, a second gear 23, a second rack 24 and a third rack 25, the first gear 22 is coaxially fixedly installed on one end of the rotating shaft 21, the second gear 23 is coaxially fixedly installed on the other end of the rotating shaft 21, the second rack 24 is fixedly installed on the upper portion of the cooling plate 30, the third rack 25 is fixedly installed on the lower portion of the preheating plate 40, the second rack 24 and the third rack 25 are respectively located above and below the T-shaped frame 12, the rotating shaft 21 is located on one side of the L-shaped frame 10, one end of the rotating shaft 21, on which the second gear 23 is installed, extends into the T-shaped frame 12, the first gear 22 is engaged with the first rack 11, and the second gear 23 is engaged with the second rack 24 and the third rack 25 at the same time.

[0041] Specifically, the first screw rod 31 is rotatably connected in the cooling plate 30, the first motor 32 is fixedly installed on one end of the cooling plate 30, the output end of the first motor 32 penetrates through the cooling plate 30 and is coaxially fixedly connected with the first screw rod 31, the first sliding block 33 is threadedly connected on the first screw rod 31, and the first sliding block 33 is slidably connected with the inside of the cooling plate 30.

[0042] More specifically, the air cooling gun 34 for releasing cold air to the second workpiece 2 is fixedly installed on the first sliding block 33.

[0043] Specifically, the second screw rod 41 is rotatably connected in the preheating plate 40, the second motor 42 is fixedly installed on one end of the preheating plate 40, the output end of the second motor 42 penetrates through the preheating plate 40 and is coaxially fixedly connected with the second screw rod 41, the second sliding block 43 is threadedly connected on the second screw rod 41, and the second sliding block 43 is slidably connected with the inside of the preheating plate 40.

[0044] More specifically, the preheating gun 44 for releasing flame to the second workpiece 2 is fixedly installed on the second sliding block 43.

[0045] More specifically, the fan is arranged in the air cooling gun 34, and one end of the air cooling gun 34 is in communication with the air source through the gas conveying pipeline.

[0046] More specifically, the welding torch for heating is arranged in the preheating gun 44, and one end of the preheating gun 44 is in communication with the combustible gas source (such as propane, acetylene) and the oxygen source (such as compressed air) through the gas conveying pipeline.

[0047] Specifically, the upper end of the recovery box 5 is provided with a filter screen 51. The recovery box 5 is used to collect the welding flux falling during the submerged arc welding work. The reusable components (such as mineral particles, alloying agents) in the welding flux can be reused after being recovered through the filter screen 51 and being treated by screening, drying, etc. The falling welding flux is easy to form dust or debris, which can be collected by the recovery box 5 to reduce the cleaning time. If the unrecovered welding flux is mixed into the subsequent welding area, it may cause defects such as pores, cracks, etc. The recovery box 5 can ensure the cleanliness of the welding area and guarantee the quality of the weld. In the automatic submerged arc welding, the recovery box 5 can be linked with the flux conveying device on the submerged arc welding machine 4 to realize closed-loop control and improve the welding consistency.

[0048] Meanwhile, the welding device can also adjust the height of the roller frame 8 to adjust the support height of the generator rotor of different sizes, so that the generator rotor of different sizes can be at the optimal welding height during welding. The specific operation steps are as follows: when the diameter of the second workpiece 2 increases, the T-shaped frame 12 on both sides of the recovery box 5 is driven to descend by the electric push rod 7, at this time, the two T-shaped frames 12 can simultaneously drive the two roller frames 8 to move downward in the supporting box 6, the spring 9 below the roller frame 8 plays an auxiliary supporting role for the roller frame 8, and the second workpiece 2 on the roller frame 8 moves downward by a certain distance with the roller frame 8, so as to ensure the consistency of the welding distance between the second workpiece 2 and the welding gun of the submerged arc welding machine 4. At the same time, because the first gear 22 on the T-shaped frame 12 on both sides of the recovery box 5 is engaged with the first rack 11 on the L-shaped frame 10 at the corresponding position, the first gear 22 will rotate during the descent of the T-shaped frame 12, and the second gear 23 will be driven to rotate through the rotating shaft 21, and the second gear 23 will drive the second rack 24 and the third rack 25 to move away from each other, that is, the cooling plate 30 and the preheating plate 40 move away from each other, so as to match the diameter of the second workpiece 2. Conversely, when the diameter of the second workpiece 2 decreases, the T-shaped frame 12 on both sides of the recovery box 5 is driven to ascend by the electric push rod 7, and during the ascent of the T-shaped frame 12, the first gear 22 will rotate in the opposite direction, and the second gear 23 will be driven to rotate through the rotating shaft 21, and the second gear 23 will drive the second rack 24 and the third rack 25 to move close to each other, that is, the cooling plate 30 and the preheating plate 40 move close to each other.

[0049] When the cooling plate 30 needs to work, the first motor 32 is used for reciprocating rotation to drive the first screw 31 to reciprocate and drive the first sliding block 33 to reciprocate on the cooling plate 30, so that the air cooling gun 34 on the first sliding block 33 can cool the connection after welding. The fan in the air cooling gun 34 forcibly flows air to accelerate heat dissipation, so as to ensure the quality of the weld and the performance of the material.

[0050] When the preheating plate 40 needs to work, the second motor 42 is used to drive the second screw 41 to rotate back and forth, and the second sliding block 43 moves back and forth on the preheating plate 40, so that the preheating gun 44 on the second sliding block 43 can preheat the connection before welding. The gas (such as propane, acetylene) mixed with compressed air is directly heated to the surface of the second workpiece 2 through the welding torch in the preheating gun 44, which is an important process to ensure the welding quality, prevent cracks and reduce deformation.

[0051] It should be noted that the cooling work and the preheating work are not performed at the same time. The device mainly adjusts the height of the roller frame 8 and the distance between the cooling plate 30 and the preheating plate 40 through the adjusting assembly 20, so as to match the second workpiece 2 of different sizes, facilitate the subsequent preheating and cooling work, and usually the preheating work is performed before the welding work, and the cooling work is performed after the welding work.

[0052] The above-described embodiments and / or implementations are only used to illustrate the preferred embodiments and / or implementations of the present application, and do not limit the embodiments of the present application in any form. Any person skilled in the art can make some changes or modifications as other equivalent embodiments without departing from the scope of the technical means disclosed in the present application, but should be considered as the same technology or embodiment as the present application.

[0053] The principles and implementations of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and its core idea. The above description is only the preferred embodiments of the present application. It should be pointed out that due to the limitation of language expression, there are infinite specific structures. For ordinary skilled persons in the art, without departing from the principles of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in a proper way. These improvements, refinements, changes or combinations, or the application of the inventive concept and technical solution to other occasions without improvement, should be considered as the protection scope of the present application.

Claims

1. A wind power generator rotor welding device comprising a welding stand (3), characterized in that: Also include the assembly tooling (13) for assembling the second workpiece (2) and a number of first workpiece (1), the second workpiece (2) is the wind turbine rotor shaft, the first workpiece (1) is the rib plate installed on the body of the wind turbine rotor shaft; The movable submerged arc welding machine (4) is installed on the welding frame (3), the middle part of the welding frame (3) is provided with a welding groove, the welding gun of the submerged arc welding machine (4) is located in the welding groove, the lower part of the welding frame (3) is provided with a recycling box (5) with an opening upward, both ends of the recycling box (5) are provided with a supporting box (6) and an electric push rod (7), the supporting box (6) is provided with a liftable roller frame (8) inside, both ends of the recycling box (5) are fixedly installed with a back-shaped frame (10), each back-shaped frame (10) is liftable and slidably installed with a T-shaped frame (12), the output end of each electric push rod (7) is fixedly connected with the T-shaped frame (12) on the same side, each T-shaped frame (12) is fixedly connected with the roller frame (8) at the same end, one side of each supporting box (6) is provided with a sliding groove for the lifting movement of the T-shaped frame (12), the cooling plate (30) and the preheating plate (40) are slidably installed in the two T-shaped frames (12), the cooling plate (30) and the preheating plate (40) are symmetrically arranged about the central axis of the T-shaped frame (12), the cooling plate (30) is provided with a cooling device for cooling the welding position, the preheating plate (40) is provided with a preheating device for heating the welding position; Each T-shaped frame (12) is provided with an adjusting assembly (20) for adjusting the distance between the cooling plate (30) and the preheating plate (40); One side of each back-shaped frame (10) is fixedly installed with a first rack (11); Each adjusting assembly (20) comprises a rotating shaft (21), a first gear (22), a second gear (23), a second rack (24) and a third rack (25), the first gear (22) is coaxially fixedly installed on one end of the rotating shaft (21), the second gear (23) is coaxially fixedly installed on the other end of the rotating shaft (21), the second rack (24) is fixedly installed on the upper part of the cooling plate (30), the third rack (25) is fixedly installed on the lower part of the preheating plate (40), the second rack (24) and the third rack (25) are located above and below the T-shaped frame (12) respectively, the rotating shaft (21) is located on one side of the back-shaped frame (10), one end of the rotating shaft (21) installed with the second gear (23) extends into the T-shaped frame (12), the first gear (22) is engaged with the first rack (11), the second gear (23) is engaged with the second rack (24) and the third rack (25) at the same time.

2. A wind turbine generator rotor welding apparatus according to claim 1, wherein: The assembly tool (13) comprises: a pair of assembly discs (131), a central portion of each assembly disc (131) is provided with an assembly disc through hole (134), an outer side of each assembly disc (131) is provided with an assembly sleeve (132) in communication with the assembly disc through hole (134), each assembly sleeve (132) is coaxial with the corresponding assembly disc through hole (134), an inner side of each assembly disc (131) is provided with a plurality of assembly clamping grooves (133), all the assembly clamping grooves (133) on each assembly disc (131) are arranged around the assembly disc through hole (134), and each assembly clamping groove (133) is arranged along a radial direction of the assembly disc (131); the pair of assembly discs (131) are clamped and blocked at two end positions of the second workpiece (2), and the pair of assembly sleeves (132) are coaxial with the second workpiece (2), the assembly sleeve (132) and the body of the second workpiece (2) are fixed by adjusting bolts, two ends of each first workpiece (1) are clamped in the assembly clamping grooves (133) of the pair of assembly discs (131), all the first workpieces (1) are arranged at equal intervals around the circumference of the second workpiece (2), and the plate body of each first workpiece (1) is arranged along a radial direction of the second workpiece (2); two roller frames (8) are respectively supported at two ends of the second workpiece (2).

3. A wind turbine generator rotor welding apparatus according to claim 1, wherein: The cooling device comprises: a first screw rod (31) is rotatably connected in the cooling plate (30), a first motor (32) is fixedly installed at one end of the cooling plate (30), an output end of the first motor (32) penetrates the cooling plate (30) and is fixedly connected with the first screw rod (31) in a coaxial manner, a first sliding block (33) is threadedly connected on the first screw rod (31), and the first sliding block (33) is slidably connected with the inside of the cooling plate (30); a air cooling gun (34) for releasing cold air to the second workpiece (2) is fixedly installed on the first sliding block (33).

4. A wind turbine generator rotor welding apparatus according to claim 3, wherein The air cooling gun (34) is provided with a fan, and one end of the air cooling gun (34) is communicated with an air source through a gas conveying pipeline.

5. A wind turbine generator rotor welding apparatus according to claim 1, wherein: The preheating device comprises: a second screw rod (41) is rotatably connected in the preheating plate (40), a second motor (42) is fixedly installed at one end of the preheating plate (40), an output end of the second motor (42) penetrates the preheating plate (40) and is fixedly connected with the second screw rod (41) in a coaxial manner, a second sliding block (43) is threadedly connected on the second screw rod (41), and the second sliding block (43) is slidably connected with the inside of the preheating plate (40); a preheating gun (44) for releasing flame to the second workpiece (2) is fixedly installed on the second sliding block (43).

6. A wind turbine generator rotor welding apparatus according to claim 5, wherein: The preheating gun (44) is provided with a welding torch for heating, and one end of the preheating gun (44) is communicated with a combustible gas source and an oxygen source through a gas conveying pipeline.

7. A wind turbine generator rotor welding apparatus as defined in claim 1, wherein: The upper end of the recycling box (5) is provided with a filter screen (51).

8. A wind turbine generator rotor welding apparatus according to claim 1, wherein: The spring (9) is arranged between the roller frame (8) and the supporting box (6).

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