Magnetic pole welding positioner for large generator and using method of magnetic pole welding positioner

Abstract

The invention provides a magnetic pole welding positioner for a large generator and a using method of the magnetic pole welding positioner, and relates to the technical field of magnetic poles of large generators. The magnetic pole welding positioner is characterized in that a main clamping base is in transmission connection with a main moving seat through a main driver, the main driver is driven by a main lifting motor to enable the main clamping base to move up and down relative to the main moving seat, and an auxiliary clamping base is in transmission connection with an auxiliary moving seat through an auxiliary driver to enable the auxiliary moving seat to move up and down relative to the main moving seat. The auxiliary driver is driven by the auxiliary lifting motor, so that the auxiliary clamping base moves up and down relative to the auxiliary moving base, the main rotating base is rotationally connected to the main clamping base, the overturning driving motor is connected with the overturning speed reducer, the auxiliary clamping device and the main clamping device are oppositely arranged, and the auxiliary lifting motor drives the auxiliary driver to move up and down relative to the auxiliary moving base. The auxiliary clamping device and the main clamping device are used for clamping and fixing the two ends of a magnetic pole of the large generator.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic poles of large generators, and in particular to a magnetic pole welding positioner for large generators and a method of using the same. Background Art

[0002] The performance and reliability of the generator's magnetic poles directly affect the overall efficiency and life of the generator. Its design needs to comprehensively consider the magnetic field strength, heat dissipation conditions and mechanical strength. Different types of magnetic poles are suitable for specific scenarios (such as hydropower generation, pumped storage, etc.).

[0003] The production and manufacturing of the magnetic poles of large generators usually requires welding. Due to the huge volume and complex structure of the magnetic poles of large generators, the magnetic poles of large generators in the prior art are generally manually hoisted and flipped.

[0004] However, the use of manual hoisting, flipping and welding is inefficient and labor-intensive. In addition, the fixing stability of the magnetic poles during manual hoisting and welding is very poor, and the operating safety of workers is poor. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to improve the efficiency and welding stability in the magnetic pole reversal welding process of a large generator and eliminate the problems of high labor intensity and poor safety in manual hoisting and reversing operations.

[0006] In order to solve the above problems, the present invention provides a magnetic pole welding positioner for large generators, comprising: a base, a main moving base, a secondary moving base, a main clamping base, a turning reducer, a turning drive motor, a main rotating base, a main clamping device, a secondary clamping base, a secondary rotating base, a secondary clamping device and a workbench.

[0007] The main moving seat, the workbench and the auxiliary moving seat are sequentially arranged on the base along the longitudinal direction, and a first guide rail and a rack are arranged on the base. The first guide rail and the rack are arranged parallel to each other along the longitudinal direction. The main moving seat and the auxiliary moving seat are both arranged on the first guide rail, and the first guide rail is used to make the main moving seat and the auxiliary moving seat reciprocate along the longitudinal direction.

[0008] The main moving seat and the auxiliary moving seat are respectively provided with a main driving motor and an auxiliary driving motor, and the main driving motor and the auxiliary driving motor are respectively connected to the rack through corresponding transmission gears.

[0009] The main clamping base is arranged at the main movable seat, and the auxiliary clamping base is arranged at the auxiliary movable seat.

[0010] The main clamping base is drivingly connected to the main moving seat through a main driver. By driving the main driver with a main lifting motor, the main clamping base moves up and down relative to the main moving seat.

[0011] The secondary clamping base is drivingly connected to the secondary moving seat through a secondary driver. By driving the secondary driver with a secondary lifting motor, the secondary clamping base moves up and down relative to the secondary moving seat.

[0012] The main rotating seat is rotatably connected to the main clamping base. The flipping drive motor is connected to the flipping speed reducer, and the flipping speed reducer is connected to the main rotating seat. The main clamping device is arranged at the main rotating seat. The secondary rotating seat is rotatably connected to the secondary clamping base, and the secondary clamping device is arranged at the secondary rotating seat. The main rotating seat and the secondary rotating seat are used for rotating around the longitudinal direction.

[0013] The secondary clamping device is arranged opposite to the main clamping device, and the secondary clamping device and the main clamping device are used for clamping both ends of the pole of a large generator.

[0014] Further, the main moving seat includes a base and a double-column structure. The base is arranged on the first guide rail, the main drive motor is installed on the base, and the double-column structure is fixed on the base.

[0015] The main driver includes: a main worm reducer, a lead screw shaft, and a main moving nut. The main worm reducer is arranged at the top of the double-column structure and is connected to the main drive motor. The lead screw shaft is erected between the two columns of the double-column structure. The top end of the lead screw shaft is connected to the main worm reducer. The main moving nut is sleeved outside the lead screw shaft, and the main moving nut is connected to the main moving seat. The worm wheel in the main worm reducer is coaxially connected to the lead screw shaft. A self-lubricating thrust bearing is arranged at the worm wheel shaft in the main worm reducer. A bearing seat is arranged at the top of the double-column structure. A cylindrical roller bearing and a top thrust ball bearing are sequentially arranged in the bearing seat from top to bottom. The cylindrical roller bearing and the top thrust ball bearing are sleeved outside the top end of the lead screw shaft. The cylindrical roller bearing and the top thrust ball bearing are separated by a shaft shoulder. The bottom end of the lead screw shaft is installed at the bottom of the double-column structure through a bushing, and the bushing and the bottom end of the lead screw shaft are matched through a bottom thrust ball bearing.

[0016] The main moving seat and the secondary moving seat have the same structure, and the main driver and the secondary driver have the same structure.

[0017] Further, a nut fixing seat is installed on the main clamping base. The main moving nut is of a stepped shaft structure, and the large-head end of the main moving nut is stuck below the nut fixing seat.

[0018] The main clamping base is provided with a nut fixing seat, a rotation stopping frame, a falling prevention frame and a safety nut. The rotation stopping frame is detachably connected to the bottom of the nut fixing seat through a bolt. The main moving nut is arranged between the rotation stopping frame and the nut fixing seat, and the main moving nut is detachably connected to the rotation stopping frame.

[0019] The falling prevention frame is arranged on the top of the nut fixing seat. The falling prevention frame includes a left arm body and a right arm body. The tops of the left arm body and the right arm body protrude towards the middle to form a docking part. The lead screw shaft is arranged between the left arm body and the right arm body. The safety nut is sleeved outside the lead screw shaft and is placed above the main moving nut and between the left arm body and the right arm body. The docking part is placed above the safety nut.

[0020] The main clamping base is a rectangular plate-shaped structural member. A second guide rail is arranged at each column of the double-column structure. The second guide rail is arranged vertically. The wide side of the main clamping base is erected. One side plate surface of the main clamping base is matched with the two second guide rails. The nut fixing seat is arranged at one side plate surface of the main clamping base and is close to one wide side of the main clamping base.

[0021] The tilting reduction gear is arranged on one side plate surface of the main clamping base and is close to the other wide side of the main clamping base.

[0022] A transmission reduction gear is arranged between the tilting drive motor and the tilting reduction gear. The transmission reduction gear is arranged at the other wide side of the main clamping base. Both the tilting reduction gear and the transmission reduction gear are worm and gear reducers.

[0023] Furthermore, the main rotating seat is arranged at the other side plate surface of the main clamping base. A toothed slewing bearing is arranged between the main rotating seat and the main clamping base. The main clamping base is connected to the inner ring of the toothed slewing bearing, and the main rotating seat is connected to the outer ring of the toothed slewing bearing. An output gear is fixed on the output shaft of the tilting reduction gear. The output gear is meshed and driven with the outer ring gear of the toothed slewing bearing through an intermediate gear.

[0024] The rotational connection structure between the main rotating seat and the main clamping base is the same as the rotational connection structure between the secondary rotating seat and the secondary clamping base.

[0025] Further, the main rotating seat includes a vertically arranged back plate and two side plates. The outer ring of the toothed slewing bearing is arranged on the back of the back plate. The two side plates are arranged in parallel in front of the back plate. The side plates are C-shaped. The tops of the two side plates are fixed with a horizontally arranged upper support plate, and the bottoms of the two side plates are fixed with a horizontally arranged lower support plate. The two side plates and the upper support plate form the upper beam of the main rotating seat, the two side plates and the lower support plate form the lower beam of the main rotating seat, and the two side plates and the back plate form the vertical beam of the main rotating seat. The lower support plate is arranged at the top surface of the lower beam.

[0026] A plurality of vertical rib plates and horizontal rib plates are arranged at the lower beam. The plurality of vertical rib plates are arranged in parallel with the back plate and connect the two side plates together. The plurality of vertical rib plates are arranged in sequence along the length direction of the lower beam. The horizontal rib plate is arranged at the bottom surface of the lower beam and connects the two side plates together. The horizontal rib plate extends along the length direction of the lower beam.

[0027] An inclined rib plate is arranged at the upper beam. The inclined rib plate connects the two side plates together. The inclined rib plate extends along the upper inclined edge of the side plate. The upper inclined edge of the side plate is that as the side plate is farther away from the back plate, the upper inclined edge of the side plate gradually approaches the upper support plate.

[0028] Through holes are formed in the plate surfaces of the inclined rib plate and the plurality of vertical rib plates.

[0029] Further, the main clamping device includes: two horizontal clamping mechanisms and a vertical clamping mechanism. The vertical clamping mechanism is arranged at the upper beam. The fixing plate of the vertical clamping mechanism is used to push down the magnetic pole. The two horizontal clamping mechanisms are arranged oppositely at the lower beam. The horizontal pushing parts of the two horizontal clamping mechanisms are used to push and clamp the magnetic pole from the left and right sides.

[0030] The main rotating seat has the same structure as the secondary rotating seat, and the main clamping device has the same structure as the secondary clamping device.

[0031] Further, the vertical clamping mechanism includes: a hydraulic cylinder mechanism and a guide post. The hydraulic cylinder mechanism is fixed on the upper support plate. The piston rod of the hydraulic cylinder mechanism passes through the upper support plate from top to bottom and is connected to the fixing plate. The fixing plate is horizontally arranged. The bottom contour of the cross-section of the fixing plate is in an inverted V shape. The cross-section of the fixing plate is perpendicular to the axis of the main rotating seat. The guide post stands on the top surface of the fixing plate. The guide post is inserted into the upper support plate.

[0032] The horizontal clamping mechanism includes: a horizontal bracket, a pushing motor, a pushing lead screw, and a horizontal guide rail.

[0033] Each of the transverse brackets is inserted into one of the side vertical plates at the lower beam, and the pushing motor is arranged inside the transverse bracket; the pushing lead screw is arranged in the transverse bracket, the pushing lead screw is connected to the pushing motor, the pushing lead screw extends horizontally, and the pushing lead screw is connected to the transverse pushing part through screw transmission; the transverse guide rail is arranged on the transverse bracket, the transverse guide rail is arranged parallel to the pushing lead screw, the transverse pushing part is arranged on the transverse guide rail, and the transverse pushing part is used for reciprocating movement along the pushing guide rail.

[0034] A long strip through hole is formed in the transverse bracket, the long strip through hole is arranged parallel to the pushing lead screw, the pushing lead screw is arranged below the long strip through hole, a limiting protrusion protruding downward is arranged at the bottom end of the transverse pushing part, the limiting protrusion is arranged in the long strip through hole, and the pushing lead screw passes through the limiting protrusion and is in screw transmission cooperation with each other; the two transverse brackets are arranged parallel to each other, and one transverse bracket is arranged above the other transverse bracket.

[0035] Further, the transverse pushing part includes: a cushion block, a bottom plate and side clamping plates; the cushion block is detachably arranged on the pushing guide rail, and the limiting protrusion is arranged on the bottom surface of the cushion block; the bottom plate is detachably arranged on the cushion block, the bottom plate is a square plate and is arranged horizontally; the top plate surface of the lower support plate is flush with the top plate surface of the bottom plate, the side clamping plates are erected at the center of the bottom plate, the side clamping plates are arranged longitudinally, and the side clamping plates are connected to the bottom plate.

[0036] Further, the workbench is of a cuboid structure, and a plurality of rollers are arranged on the top surface of the workbench, and the plurality of rollers extend longitudinally, and the rollers are used for rotating relative to the workbench.

[0037] Vertical limit switches are respectively arranged at the upper and lower ends of the double-column structure, and the vertical limit switches are used for limiting the vertical movement range of the main clamping base; longitudinal limit switches are respectively arranged at the longitudinal two ends of the base, and the longitudinal limit switches are used for limiting the longitudinal movement range of the main moving seat and the auxiliary moving seat.

[0038] Both the bottom plate and the fixing plate are nylon plates.

[0039] In addition, the present invention also provides a use method of the positioner, and the positioner is the magnetic pole welding positioner as described above. The use method includes:

[0040] Move the main moving seat and the auxiliary moving seat longitudinally away from the workbench so that the distance between the main moving seat and the auxiliary moving seat is greater than the length of the magnetic pole. Keep the clamping heights of the main clamping device and the auxiliary clamping device consistent with the height of the workbench, and keep the main clamping device and the auxiliary clamping device in a fully open state;

[0041] Lift the magnetic pole above the workbench by a crane, and suspend the magnetic pole longitudinally at the center between the main moving seat and the auxiliary moving seat. At this time, the magnetic pole does not fall into place but is in a suspended state;

[0042] Lower the magnetic pole, and at the same time adjust the distance between the main moving seat and the auxiliary moving seat so that both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device that are kept in a fully open state. At this time, the magnetic pole is still in a suspended state;

[0043] Continue to lower the height of the magnetic pole by the crane, and adjust the positions of the sides of both ends of the magnetic pole relative to the main clamping device and the auxiliary clamping device in real time so that both ends of the magnetic pole completely fall into the main clamping device and the auxiliary clamping device;

[0044] Confirm whether the bottom corners of both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device, and place the magnetic pole on the workbench;

[0045] Make the main clamping device and the auxiliary clamping device clamp and fix both ends of the magnetic pole longitudinally, and make the main rotating seat and the auxiliary rotating seat rise synchronously to;

[0046] Adjust the rotation speed of the flipping drive motor according to the height difference between the axis of the magnetic pole and the center of the rotation axes of the main and auxiliary rotating seats during the rotation of the magnetic pole.

[0047] The technical effects of the present invention at least include:

[0048] In the present invention, through the mutual cooperation of the main moving seat, the auxiliary moving seat, the main clamping base, the flipping reduction gear, the flipping drive motor, the main rotating seat, the main clamping device, the auxiliary clamping base, the auxiliary rotating seat, the auxiliary clamping device and the workbench, the automatic clamping and fixing of the magnetic pole of a large generator, as well as the automatic lifting and automatic flipping, are realized, and the function of auxiliary flipping and positioning for magnetic pole welding is achieved, replacing manual lifting and flipping, improving safety, and at the same time saving labor intensity. The main and auxiliary moving seats at both ends of the positioner can perform longitudinal movement and can adapt to magnetic poles of different lengths. In addition, through the main and auxiliary clamping bases, the positioner can move up and down vertically, that is, along the Z-axis, and can cooperate with subsequent welding robots and magnetic poles of different heights for welding operations. The main and auxiliary clamping devices cooperate with the workbench to realize automatic centering of clamping for magnetic poles within 15 tons, reducing labor intensity.

[0049] Moreover, by using the main and auxiliary worm reducers to provide a large transmission ratio, the main and auxiliary drive motors can lift and lower the poles of a large generator without the need to provide high power. In addition, the screw shaft and the main and auxiliary moving nuts in screw transmission can achieve a single-stage large reduction ratio, making the transmission ratio more flexible. Also, the noise during the transmission process is small.

[0050] In addition, taking advantage of the small volume of the main and auxiliary worm reducers, the screw shaft, and the main and auxiliary moving nuts, the volume of the entire set of equipment is fully reduced, avoiding interference with the lifting and movement of large poles during the hoisting process of large poles, thus facilitating the installation and lifting of large poles. Since the main and auxiliary worm reducers, the screw shaft, and the main and auxiliary moving nuts are introduced into the equipment, the axial force on the screw shaft is too large. To ensure the normal operation of the main and auxiliary drives and reduce the wear of the components of the main and auxiliary drives, top thrust ball bearings and bottom thrust ball bearings are used to effectively support the screw shaft, and cylindrical roller bearings are arranged at the top of the screw shaft to prevent severe wear at the top of the screw shaft due to heavy loads during the pole lifting process. At the same time, the bearing housing effectively protects the cylindrical roller bearings and the top thrust ball bearings. For the situation that the main and auxiliary worm reducers are set at the top of the double-column structure and it is inconvenient for personnel to perform regular maintenance, self-lubricating thrust bearings are used in the main worm reducer. Generally, there is no need to perform smooth maintenance on the self-lubricating thrust bearings, and at the same time, it prevents excessive wear of the shaft body in the reducer caused by the axial force generated during the transmission of the main and auxiliary worm reducers. In this way, the main and auxiliary drives are effectively protected.

[0051] Since both the tilting reducer and the transmission reducer are worm and worm gear reducers, the space occupied by the tilting reducer and the transmission reducer is reduced, which otherwise would affect the rotation of the main clamping base. During the rotation of the pole, since no tilting drive motor and tilting reducer and other components are provided at the secondary clamping base, the eccentric force at the main clamping base is large during the pole rotation. To reduce the influence of this eccentric force on the deflection of the main clamping base and the entire set of equipment, taking advantage of the fact that both the tilting drive motor and the tilting reducer are worm and worm gear reducers and are light in weight, the weight at the main clamping base is greatly reduced, making the weight at the main clamping base roughly the same as the weight at the secondary clamping base as much as possible, reducing the influence of deflection on the main clamping base and the entire set of equipment, and preventing wear of the pole due to deflection at the main clamping base.

[0052] A toothed slewing bearing is provided between the main rotating seat and the main clamping base, and a toothed slewing bearing is provided between the secondary rotating seat and the secondary clamping base. The toothed slewing bearing can simultaneously bear various complex forces such as axial force, radial force, tilting moment, and deflection moment, meeting the multi-directional force requirements during the rotation of the large generator pole on the positioner, enabling the main and secondary clamping bases to stably support the pole. Moreover, through the gear structure on the outer ring of the toothed slewing bearing, it meshes with the adjacent gears, directly transmitting torque and rotational power, reducing the additional configuration of the gearbox in the traditional transmission system and simplifying the mechanical structure. Additionally, the rolling elements of the toothed slewing bearing, such as steel balls and rollers, and the raceway design ensure low-friction rotation, coordinating with the accuracy of gear meshing to ensure precise adjustment of the rotation angles of the main and secondary clamping bases and guarantee the accuracy of the flipping angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 FIG. is a schematic perspective view of the pole welding positioner according to the specific embodiment of the present invention;

[0054] Figure 2 FIG. is another schematic perspective view of the pole welding positioner according to the specific embodiment of the present invention;

[0055] Figure 3 is Figure 1 a schematic enlarged view at P in

[0056] Figure 4 is Figure 2 a schematic enlarged view at Q in

[0057] Figure 5 is Figure 2 a schematic enlarged view at R in

[0058] Figure 6 FIG. is a schematic perspective view of the pole welding positioner according to the specific embodiment of the present invention after installing the upper pole;

[0059] Figure 7 FIG. is a schematic flow chart of the usage method of the pole welding positioner according to the present invention;

[0060] Reference numerals: 1, base; 11, first guide rail; 12, rack; 2, main moving seat; 21, main clamping base; 211, nut fixing seat; 212, anti-rotation frame; 213, anti-falling frame; 214, safety nut; 22, tilting reducer; 221, transmission reducer; 222, output gear; 223, intermediate gear; 23, tilting drive motor; 24, main rotating seat; 241, toothed slewing bearing; 242, back plate; 243, side vertical plate; 244, upper support plate; 245, lower support plate; 246, inclined rib plate; 25, main clamping device; 251, vertical clamping mechanism; 2511, fixing plate; 2512, hydraulic cylinder mechanism; 2513, guide post; 252, horizontal clamping mechanism; 2521, horizontal pushing top; 25211, spacer block; 25212, bottom plate; 25213, side clamping plate; 25214, limit projection; 2522, horizontal bracket; 2523, pushing guide rail; 2524, long strip through hole; 261, main drive motor; 262, main lifting motor; 263, base; 264, double column structure; 265, second guide rail; 271, main worm reducer; 272, lead screw shaft; 273, main moving nut; 3, auxiliary moving seat; 31, auxiliary clamping base; 32, auxiliary rotating seat; 33, auxiliary clamping device; 34, auxiliary drive motor; 35, auxiliary lifting motor; 4, workbench; 41, roller. Detailed implementation manners

[0061] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The embodiments of the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0062] It can be understood that the terms "first", "second", etc. used in the present invention can be used herein to describe various technical terms and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Unless otherwise specifically stated, these technical terms are not limited by these terms. These terms are only used to distinguish one technical term from another. For example, without departing from the scope of the present invention, the first receiving device and the second receiving device are different receiving devices, the first surface and the second surface are different surfaces, and the first plane, the second plane, the third plane, and the fourth plane are different planes. In the description of the embodiments of the present invention, the meanings of "a plurality" and "several" are at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0063] See also Figures 1 to 6 The present embodiment provides a magnetic pole welding positioner for a large generator, comprising: a base 1, a main moving base 2, a secondary moving base 3, a main clamping base 21, a turning reducer 22, a turning drive motor 23, a main rotating base 24, a main clamping device 25, a secondary clamping base 311, a secondary rotating base 32, a secondary clamping device 33 and a workbench 4.

[0064] The main moving seat 2, the workbench 4 and the auxiliary moving seat 3 are sequentially arranged on the base 1 along the longitudinal direction. The base 1 is provided with a first guide rail 11 and a rack 12. The first guide rail 11 and the rack 12 are arranged parallel to each other along the longitudinal direction. The main moving seat 2 and the auxiliary moving seat 3 are both arranged on the first guide rail 11. The first guide rail 11 is used to make the main moving seat 2 and the auxiliary moving seat 3 reciprocate along the longitudinal direction.

[0065] The main moving seat 2 and the auxiliary moving seat 3 are respectively provided with a main driving motor 261 and an auxiliary driving motor 34, and the main driving motor 261 and the auxiliary driving motor 34 are respectively connected to the rack 12 through corresponding transmission gears.

[0066] The main clamping base 21 is arranged at the main moving base 2, and the auxiliary clamping base 311 is arranged at the auxiliary moving base 3.

[0067] The main clamping base 21 is connected to the main moving base 2 through the main transmission device, and the main transmission device is driven by the main lifting motor 262 to make the main clamping base 21 move up and down relative to the main moving base 2.

[0068] The auxiliary clamping base 311 is connected to the auxiliary moving base 3 through the auxiliary transmission device, and the auxiliary transmission device is driven by the auxiliary lifting motor 35 to make the auxiliary clamping base 311 move up and down relative to the auxiliary moving base 3.

[0069] The main rotating seat 24 is rotatably connected to the main clamping base 21, the flip driving motor 23 is connected to the flip reducer 22, the flip reducer 22 is connected to the main rotating seat 24, the main clamping device 25 is arranged at the main rotating seat 24, the auxiliary rotating seat 32 is rotatably connected to the auxiliary clamping base 311, the auxiliary clamping device 33 is arranged at the auxiliary rotating seat 32, the main rotating seat 24 and the auxiliary rotating seat 32 are used to rotate around the longitudinal direction,

[0070] The auxiliary clamping device 33 is arranged opposite to the main clamping device 25 , and the auxiliary clamping device 33 and the main clamping device 25 are used to clamp and fix the two ends of the magnetic pole of the large generator.

[0071] Furthermore, the main moving base 2 includes a base 263 and a double column structure 264. The base 263 is arranged on the first guide rail 11, the main driving motor 261 is installed on the base 263, and the double column structure 264 is fixed on the base 263.

[0072] The main transmission includes: a main worm reducer 271, a lead screw shaft 272, and a main moving nut 273. The main worm reducer 271 is arranged at the top of the double-column structure 264 and connected to the main drive motor 261. The lead screw shaft 272 is vertically arranged between the two columns of the double-column structure 264. The top end of the lead screw shaft 272 is connected to the main worm reducer 271. The main moving nut 273 is sleeved outside the lead screw shaft 272, and the main moving nut 273 is connected to the main moving seat 2.

[0073] The worm gear inside the main worm reducer 271 is coaxially connected to the lead screw shaft 272. A self-lubricating thrust bearing is arranged at the worm gear shaft inside the main worm reducer 271. A bearing seat is arranged at the top of the double-column structure 264. Inside the bearing seat, a cylindrical roller bearing and a top thrust ball bearing are arranged in sequence from top to bottom. The cylindrical roller bearing and the top thrust ball bearing are sleeved outside the top end of the lead screw shaft 272. The cylindrical roller bearing and the top thrust ball bearing are separated by a shaft shoulder. The bottom end of the lead screw shaft 272 is installed at the bottom of the double-column structure 264 through a bushing. The bushing and the bottom end of the lead screw shaft 272 are matched through a bottom thrust ball bearing.

[0074] The main moving seat 2 has the same structure as the auxiliary moving seat 3, and the main transmission has the same structure as the auxiliary transmission.

[0075] By using the double-column structure 264, not only can the effective supporting force for the magnetic pole be improved, but also the main transmission can be installed using the space between the two columns, compressing the volume.

[0076] In addition, considering the huge volume and weight of the magnetic pole of a large generator, it is necessary to provide strong and effective support when it is hovering. For this reason, the main transmission uses the main worm reducer 271, the lead screw shaft 272, and the main moving nut 273 to cooperate with each other. By using the characteristic of strong self-locking of screw transmission, the one-way transmission of the power output by the main and auxiliary drive motors 34 is effectively guaranteed, so that the main and auxiliary worm reducers respectively form the first self-locking transmission protection. In addition, the lead screw shaft 272 and the main and auxiliary moving nuts form the second self-locking transmission protection. By using these two self-locking transmission protections, it is possible to prevent the situation that when the driving force of the main and auxiliary drive motors 34 is insufficient, the weight of the magnetic pole is too large, resulting in serious overload of the main and auxiliary drive motors 34 and the magnetic pole falling.

[0077] Moreover, by using the main and auxiliary worm reducers to provide a large transmission ratio, the main and auxiliary drive motors 34 can realize the lifting operation of the magnetic pole of a large generator without providing high power. And the screw transmission of the lead screw shaft 272 and the main and auxiliary moving nuts can achieve a single-stage large reduction ratio, making the transmission ratio more flexible. And the noise is small during the transmission process.

[0078] In addition, taking advantage of the characteristics of the main and auxiliary worm reducers, the lead screw shaft 272, and the small volume of the main and auxiliary moving nuts, the volume of the whole set of equipment is fully reduced, avoiding hoisting and moving interference with the large magnetic pole during the hoisting process of the large magnetic pole, thus facilitating the installation and lifting of the large magnetic pole.

[0079] In addition, since the main and auxiliary worm reducers, the lead screw shaft 272, and the main and auxiliary moving nuts are introduced into the equipment, the axial force on the lead screw shaft 272 is too large. To ensure the normal operation of the main and auxiliary drives and reduce the wear of the components of the main and auxiliary drives, top thrust ball bearings and bottom thrust ball bearings are used to effectively support the lead screw shaft 272, and cylindrical roller bearings are used at the top of the lead screw shaft 272 to prevent severe wear at the top of the lead screw shaft 272 when the magnetic pole is lifted and lowered under heavy load at the top of the lead screw shaft 272. At the same time, the bearing seat effectively protects the cylindrical roller bearings and the top thrust ball bearings.

[0080] In addition, for the situation that the main and auxiliary worm reducers are set at the top of the double-column structure 264, which is inconvenient for personnel to perform regular maintenance, self-lubricating thrust bearings are used in the main worm reducer 271. Generally, there is no need to perform smooth maintenance on the self-lubricating thrust bearings, and at the same time, it prevents excessive wear of the shaft body in the reducer caused by the axial force generated during the transmission of the main and auxiliary worm reducers. In this way, the main and auxiliary drives are effectively protected.

[0081] Furthermore, the main clamping base 21 is equipped with a nut fixing seat 211, a rotation stop frame 212, a falling prevention frame 213, and a safety nut 214. The rotation stop frame 212 is detachably connected to the bottom of the nut fixing seat 211 by bolts. The main moving nut 273 is arranged between the rotation stop frame 212 and the nut fixing seat 211, and the main moving nut 273 is detachably connected to the rotation stop frame 212.

[0082] The falling prevention frame 213 is arranged on the top of the nut fixing seat 211. The falling prevention frame 213 includes a left arm body and a right arm body. The tops of the left arm body and the right arm body protrude towards the middle with docking parts. The lead screw shaft 272 is arranged between the left arm body and the right arm body. The safety nut 214 is sleeved outside the lead screw shaft 272 and placed above the main moving nut 273, between the left arm body and the right arm body, and the docking parts are placed above the safety nut 214.

[0083] Specifically, the falling prevention frame and the main moving nut are connected and fixed as a whole by dimension matching and screws on both sides. The rotation stop frame 212 and the main moving nut 273 are connected and fixed by 4 bolts to prevent the main moving nut 273 from rotating along with the lead screw shaft 272.

[0084] The anti-falling bracket 213 is used to prevent the magnetic pole from stalling and falling due to accidents. At the same time, the anti-rotation bracket 212 is used in cooperation with the nut fixing seat 211 to prevent the main moving nut 273 from rotating along with the lead screw shaft 272, ensuring the smooth lifting and lowering of the main clamping base 21. In addition, the safety nut 214 can fully ensure the safety of the main moving nut 273 during the rotation process relative to the lead screw shaft 272.

[0085] The main clamping base 21 is a rectangular plate-like structural member. A second guide rail 265 is provided at each column of the double-column structure 264. The second guide rail 265 is arranged vertically. The wide side of the main clamping base 21 is erected. One side plate surface of the main clamping base 21 is matched with the two second guide rails 265. The nut fixing seat 211 is arranged at one side plate surface of the main clamping base 21 and is close to one wide side of the main clamping base 21.

[0086] It should be noted that the secondary clamping base 311 has the same structure as the main clamping base 21. That is to say, the secondary clamping base 311 is also equipped with a nut fixing seat 211, and the structure of this nut fixing seat 211 is the same as that of the main clamping base 21. And corresponding anti-rotation brackets 212 and anti-falling brackets 213 are also provided. The secondary moving nut is also a stepped shaft structure.

[0087] The tilting reduction gear 22 is arranged on one side plate surface of the main clamping base 21 and is close to the other wide side of the main clamping base 21.

[0088] A transmission reduction gear 221 is arranged between the tilting drive motor 23 and the tilting reduction gear 22. The transmission reduction gear 221 is arranged at the other wide side of the main clamping base 21. Both the tilting reduction gear 22 and the transmission reduction gear 221 are worm and worm wheel reduction gears.

[0089] Since both the tilting reduction gear 22 and the transmission reduction gear 221 are worm and worm wheel reduction gears, the space occupied by the tilting reduction gear 22 and the transmission reduction gear 221 is reduced, which may otherwise affect the rotation of the main clamping base 21. During the rotation of the magnetic pole, since no components such as the tilting drive motor 23 and the tilting reduction gear 22 are provided at the secondary clamping base 311, during the rotation of the magnetic pole, the eccentric force at the main clamping base 21 is large. To reduce the deflection influence of this eccentric force on the main clamping base 21 and the entire set of equipment, due to the fact that both the tilting drive motor 23 and the tilting reduction gear 22 are worm and worm wheel reduction gears and are light in weight, the weight at the main clamping base 21 is greatly reduced, making the weight at the main clamping base 21 approximately the same as the weight of the secondary clamping base 311 as much as possible, reducing the deflection influence on the main clamping base 21 and the entire set of equipment, and preventing the magnetic pole from being worn due to deflection at the main clamping base 21.

[0090] Furthermore, the main rotating seat 24 is arranged on the other side plate surface of the main clamping base 21, and a toothed slewing bearing 241 is arranged between the main rotating seat 24 and the main clamping base 21, the main clamping base 21 is connected to the inner ring of the toothed slewing bearing 241, and the main rotating seat 24 is connected to the outer ring of the toothed slewing bearing 241, and the output shaft of the flip reducer 22 is fixed with an output gear 222, and the output gear 222 is meshed with the outer ring gear of the toothed slewing bearing 241 through the intermediate gear 223 for transmission.

[0091] The rotation connection structure between the main rotating seat 24 and the main clamping base 21 is the same as the rotation connection structure between the auxiliary rotating seat 32 and the auxiliary clamping base 311. That is, a toothed slewing bearing 241 is also provided between the auxiliary rotating seat 32 and the auxiliary clamping base 311.

[0092] Due to the complex shape and structure of the magnetic poles, the torques received by the main and auxiliary clamping bases 311 during the rotation process are uncertain and uncontrollable, especially the main clamping base 21 also bears the deflection torque during the rotation process. For this reason, a toothed slewing bearing 241 is provided between the main rotating seat 24 and the main clamping base 21, and a toothed slewing bearing 241 is provided between the auxiliary rotating seat 32 and the auxiliary clamping base 311. The toothed slewing bearing 241 can simultaneously bear multiple complex forces such as axial force, radial force, overturning torque, deflection torque, etc., to meet the multi-directional force requirements of the large generator magnetic poles during the rotation process on the positioner, so that the main and auxiliary clamping bases 311 can stably support the magnetic poles. Moreover, the gear structure of the outer ring of the toothed slewing bearing 241 meshes with the adjacent gears to directly transmit torque and rotational power, reduce the additional configuration of the gear box in the traditional transmission system, and simplify the mechanical structure. In addition, the rolling elements of the toothed slewing bearing 241, such as steel balls and rollers, and the raceway design ensure low-friction rotation, and the accuracy of the gear meshing ensures the precise adjustment of the rotation angle of the main and auxiliary clamping bases 311 and the accuracy of the flipping angle.

[0093] Further, the main rotating seat 24 includes a vertically arranged back plate 242 and two side plates 243, the outer ring of the toothed slewing bearing 241 is arranged on the back side of the back plate 242, the two side plates 243 are arranged in parallel in front of the back plate 242, the side plates 243 are C-shaped, the top ends of the two side plates 243 are fixed with a horizontally arranged upper support plate 244, the bottom ends of the two side plates 243 are fixed with a horizontally arranged lower support plate 245, the two side plates 243 and the upper support plate 244 constitute the upper beam of the main rotating seat 24, the two side plates 243 and the lower support plate 245 constitute the lower beam of the main rotating seat 24, the two side plates 243 and the back plate 242 constitute the vertical beam of the main rotating seat 24, and the lower support plate 245 is arranged on the top surface of the lower beam.

[0094] A plurality of vertical rib plates and horizontal rib plates are provided at the lower beam. The plurality of vertical rib plates are arranged in parallel with the back plate 242 and connect the two side plates 243 together. The plurality of vertical rib plates are arranged in sequence along the length direction of the lower beam. The horizontal rib plate is provided at the bottom surface of the lower beam and connects the two side plates 243 together. The horizontal rib plate extends along the length direction of the lower beam.

[0095] An inclined rib plate 246 is provided at the upper beam. The inclined rib plate 246 connects the two side plates 243 together. The inclined rib plate 246 extends along the upper inclined edge of the side plate 243. The upper inclined edge of the side plate 243 is such that as it moves away from the back plate 242, the upper inclined edge of the side plate 243 gradually approaches the upper support plate 244.

[0096] Through holes are provided on the plate surfaces of the inclined rib plate 246 and the plurality of vertical rib plates.

[0097] The back plate 242 and the two side plates 243 are spliced into the main body structure of the main and auxiliary rotating seats 32, which can reduce the weight of the main and auxiliary rotating seats 32, reduce the overall power consumption of the equipment, reduce the supporting force of the main and auxiliary clamping bases 311 on the rotation process of the main and auxiliary rotating seats 32, prevent the supporting strength from being too high, resulting in unstable supporting force during the rotation process, and causing slight jitter of the magnetic poles during the flipping process, thus affecting the welding effect.

[0098] In addition, through holes are provided on the plate surfaces of the inclined rib plate 246 and the plurality of vertical rib plates, which can play a role in weight reduction, reduce the thermal deformation rate of the inclined rib plate 246 and the plurality of vertical rib plates, prevent the inclined rib plate 246 and the plurality of vertical rib plates from having excessive thermal deformation, and causing cracks at the connection of the back plate 242 and the two side plates 243, etc., affecting the strength of the main body structure of the main and auxiliary rotating seats 32.

[0099] In addition, the vertical rib plates, horizontal rib plates and inclined rib plate 246 form an effective structural connection between the two side plates 243, preventing the main and auxiliary rotating seats 32 from being overly hollow and causing jitter during the process of the main and auxiliary rotating seats 32 driving the magnetic poles to rotate.

[0100] Further, the main clamping device 25 includes: two horizontal clamping mechanisms 252 and a vertical clamping mechanism 251. The vertical clamping mechanism 251 is provided at the upper beam. The fixing plate 2511 of the vertical clamping mechanism 251 is used to push down the magnetic pole. The two horizontal clamping mechanisms 252 are oppositely arranged at the lower beam. The horizontal pushing parts 2521 of the two horizontal clamping mechanisms 252 are used to push and clamp the magnetic pole from the left and right sides.

[0101] The main rotating seat 24 has the same structure as the auxiliary rotating seat 32, and the main clamping device 25 has the same structure as the auxiliary clamping device 33.

[0102] The magnetic pole ends are clamped by the cooperation of the vertical clamping mechanism 251 and the lower beam, and at the same time, the magnetic pole is clamped from the side by two horizontal clamping mechanisms 252. In this way, the main and auxiliary clamping devices 33 effectively clamp both ends of the magnetic pole from the up and down and left and right directions, preventing the magnetic pole from swinging laterally during rotation, that is, not swinging left and right.

[0103] Further, the vertical clamping mechanism 251 includes: a hydraulic cylinder mechanism 2512 and a guide post 2513. The hydraulic cylinder mechanism 2512 is fixed on the upper support plate 244. The piston rod of the hydraulic cylinder mechanism 2512 passes through the upper support plate 244 from top to bottom and is connected to the fixed plate 2511. The fixed plate 2511 is horizontally arranged. The bottom contour of the cross-section of the fixed plate 2511 is in an inverted V shape. The cross-section of the fixed plate 2511 is perpendicular to the axial direction of the main rotating seat 24. The guide post 2513 stands on the top surface of the fixed plate 2511, and the guide post 2513 is inserted into the upper support plate 244;

[0104] By using the bottom contour of the cross-section of the fixed plate 2511 in an inverted V shape, the bottom surface of the fixed plate 2511 is made to have the same shape as the top surface of the magnetic pole, and in cooperation with the downward strong pushing of the hydraulic cylinder mechanism 2512 on the fixed plate 2511, full clamping and fixing of both ends of the magnetic pole are achieved. And the guide post 2513 is used to ensure that the fixed plate 2511 is vertically pushed down and clamped, preventing the magnetic pole from rotating relative to the main and auxiliary clamping devices 33.

[0105] The horizontal clamping mechanism 252 includes: a transverse bracket 2522, a pushing motor, a pushing lead screw, and a pushing guide rail 2523.

[0106] Each transverse bracket 2522 is inserted into a side vertical plate 243 at the lower beam. The pushing motor is arranged inside the transverse bracket 2522; the pushing lead screw is arranged in the transverse bracket 2522. The pushing lead screw is connected to the pushing motor. The pushing lead screw extends horizontally. The pushing lead screw is connected to the transverse pushing part 2521 through screw transmission; the pushing guide rail 2523 is arranged on the transverse bracket 2522. The pushing guide rail 2523 is arranged in parallel with the pushing lead screw. The transverse pushing part 2521 is arranged on the pushing guide rail 2523, and the transverse pushing part 2521 is used for reciprocating movement along the pushing guide rail 2523.

[0107] A long strip-shaped through hole 2524 is provided at the transverse bracket 2522. The long strip-shaped through hole 2524 is arranged in parallel with the pushing lead screw. The pushing lead screw is arranged below the long strip-shaped through hole 2524. A downward protruding limit protrusion 25214 is arranged at the bottom end of the transverse pushing part 2521. The limit protrusion 25214 is arranged in the long strip-shaped through hole 2524. The pushing lead screw passes through the limit protrusion 25214 and is in screw transmission cooperation with each other; the two transverse brackets 2522 are arranged in parallel with each other, and one transverse bracket 2522 is arranged above the other transverse bracket 2522.

[0108] Considering that the magnetic poles of large generators are large in volume and weight, especially with a very large cross-section. When just starting to rotate, the side of the magnetic pole is the farthest from the rotation axis. During the process of the clamping device driving the magnetic pole to rotate, due to the influence of its own inertia, the magnetic pole generates a reverse resistance torque on the main and auxiliary clamping devices 33. Therefore, during the repeated start-stop process of the magnetic pole, the clamping force at the side edge of the magnetic pole is likely to fail. In view of this situation, through the mutual cooperation of the above-mentioned horizontal bracket 2522, the pushing motor, the pushing lead screw and the pushing guide rail 2523, the adjustment of the clamping force on both horizontal sides is realized. After starting and stopping multiple times during the flipping process of the magnetic pole, the pushing motor can be driven to rotate the pushing lead screw, so that the horizontal pushing part 2521 moves along the pushing guide rail 2523 and continuously pushes the side of the magnetic pole, preventing a gap from being generated between the horizontal pushing part 2521 and the magnetic pole, thereby effectively coping with the problem of the loosening of the horizontal pushing part 2521 caused by the reverse resistance torque generated by the huge magnetic pole on the main and auxiliary clamping devices 33.

[0109] Further, the horizontal pushing part 2521 includes: a spacer block 25211, a bottom plate 25212 and a side clamping plate 25213; the spacer block 25211 is detachably arranged on the pushing guide rail 2523, and a limit protrusion 25214 is arranged on the bottom surface of the spacer block 25211; the bottom plate 25212 is detachably arranged on the spacer block 25211, the bottom plate 25212 is a square plate and is horizontally arranged, and the top plate surface of the lower support plate 245 is flush with the top plate surface of the bottom plate 25212; the side clamping plate 25213 is erected at the center of the bottom plate 25212, the side clamping plate 25213 is arranged longitudinally, and the side clamping plate 25213 is connected to the bottom plate 25212.

[0110] Preferably, the two pushing motors can be two servo drive motors of the same model, and the two pushing lead screws of each horizontal clamping mechanism 252 are lead screws of the same model. In this way, when starting the two pushing motors and driving the corresponding horizontal pushing parts 2521 to move towards the center through the pushing lead screws, the synchronous movement of the two horizontal pushing parts 2521 is realized, and through the precise control of the rotation angle of the servo motor, the accurate control of the synchronous closing distance of the two horizontal pushing parts 2521 towards the center is realized, ensuring the accuracy of the synchronous pushing of the two horizontal pushing parts 2521 towards the center in real time on the magnetic pole. In this way, even if the magnetic pole is not at the center of the lower support plate 245, the characteristics that the horizontal pushing parts 2521 can push in real time and synchronously and accurately can be utilized to automatically return the deviated magnetic pole end to the central position, realizing the automatic centering and positioning of the magnetic pole end. The automatic centering of both ends of the magnetic pole is realized, ensuring that the center of gravity of the magnetic pole does not shift during flipping. The automatic centering of magnetic poles within 15 tons of clamping can be realized.

[0111] In addition, regarding the uniqueness of the bottom structure of the magnetic pole: downward protruding mechanisms are provided at the bottoms of both ends of the magnetic pole. In order to effectively support the protruding structures, side clamping plates 25213 are erected at the center of the bottom plate 25212. The side clamping plates 25213 are arranged longitudinally, and the top plate surface of the lower support plate 245 is flush with the top plate surface of the bottom plate 25212, so as to effectively support the protruding structures by the bottom plate 25212 and the lower support plate 245 at the same time, and the side clamping plates 25213 can fully clamp the sides of the protruding structures.

[0112] Furthermore, the workbench 4 is of a cuboid structure, and a plurality of rollers 41 are arranged on the top surface of the workbench 4. The plurality of rollers 41 extend longitudinally, and the rollers 41 are used to rotate relative to the workbench 4;

[0113] The use of the plurality of rollers 41 can facilitate the left - right movement of the magnetic pole on the workbench 4 and facilitate the position adjustment of the magnetic pole on the workbench 4.

[0114] Vertical limit switches are respectively arranged at the upper and lower ends of the double - column structure 264. The vertical limit switches are used to limit the vertical movement range of the main clamping base 21. Longitudinal limit switches are respectively arranged at the longitudinal two ends of the base 1. The longitudinal limit switches are used to limit the longitudinal movement range of the main moving seat 2 and the auxiliary moving seat 3;

[0115] The longitudinal movement range of the main and auxiliary clamping bases 311 is limited by the vertical limit switches, and the longitudinal movement range of the main and auxiliary moving seats 3 is limited by the longitudinal limit switches, so as to effectively limit the vertical and longitudinal movement ranges of the magnetic pole.

[0116] The lower support plate 245 and the fixing plate 2511 are both nylon plates. In addition, erected nylon plates are respectively detachably fixed on the inner sides of the two side clamping plates 25213. By using these nylon plates, the workpiece can be prevented from being damaged when hoisting and clamping the workpiece.

[0117] See Figure 7 , in addition, this embodiment also provides a use method of a positioner. The positioner is the above - mentioned magnetic - pole welding positioner. The use method includes:

[0118] Move the main moving seat 2 and the auxiliary moving seat 3 longitudinally away from the workbench 4 so that the distance between the main moving seat 2 and the auxiliary moving seat 3 is greater than the length of the magnetic pole. Make the clamping heights of the main clamping device 25 and the auxiliary clamping device 33 consistent with the height of the workbench 4, and make the main clamping device 25 and the auxiliary clamping device 33 remain in a fully open state;

[0119] Lift the magnetic pole above the workbench 4 by a crane, and make the magnetic pole longitudinally suspended and arranged at the center between the main moving seat 2 and the auxiliary moving seat 3. At this time, the magnetic pole does not land but is in a suspended state;

[0120] Lower the magnetic pole, and at the same time adjust the distance between the main moving seat 2 and the secondary moving seat 3 so that both ends of the magnetic pole fall into the main clamping device 25 and the secondary clamping device 33 that are in a fully open state. At this time, the magnetic pole is still in a suspended state;

[0121] Continue to lower the height of the magnetic pole by the crane, and adjust the positions of the sides of both ends of the magnetic pole relative to the main clamping device 25 and the secondary clamping device 33 in real time, so that both ends of the magnetic pole completely fall into the main clamping device 25 and the secondary clamping device 33;

[0122] Confirm whether the bottom corners of both ends of the magnetic pole fall into the main clamping device 25 and the secondary clamping device 33, and place the magnetic pole on the workbench 4;

[0123] Make the main clamping device 25 and the secondary clamping device 33 clamp and fix both ends of the magnetic pole longitudinally, and make the main rotating seat 24 and the secondary rotating seat 32 rise synchronously to;

[0124] Adjust the rotation speed of the flipping drive motor 23 according to the height difference between the axis of the magnetic pole and the center of the rotation axis of the main and secondary rotating seats 32 during the rotation of the magnetic pole.

[0125] Through the mutual cooperation of the crane and the positioner, and in combination with this usage method, the clamping and positioning of the beam magnetic pole are simplified, the clamping efficiency of the magnetic pole is improved, and the clamping and positioning accuracy of the magnetic pole is ensured.

[0126] In addition, the magnetic pole welding positioner of this embodiment realizes the continuous flipping of the magnetic pole by ±0 - 180°.

[0127] The magnetic pole welding positioner of this embodiment can perform flipping welding on magnetic poles with a length of 1000 - 4000 mm. The length of the first guide rail 11 of this embodiment can be 6000 mm long, and the effective stroke is 4500 mm.

[0128] In addition, the workbench 4 in this embodiment is detachably arranged on the base 1. The workbench 4 can be of various specifications, such as 1000×300×400 mm in length, width and height, or 2000×540×400 mm in length, width and height, respectively adapting to the horizontal placement of magnetic poles with lengths of 1000 - 2000 mm and 2000 - 4000 mm.

[0129] In this embodiment, through the mutual cooperation of the main moving seat 2, the auxiliary moving seat 3, the main clamping base 21, the tilting reduction gear 22, the tilting drive motor 23, the main rotating seat 24, the main clamping device 25, the auxiliary clamping base 311, the auxiliary rotating seat 32, the auxiliary clamping device 33 and the workbench 4, the automatic clamping and fixing of the magnetic poles of large generators are realized, as well as the automatic lifting and automatic tilting, realizing the function of auxiliary tilting and positioning for magnetic pole welding, replacing manual hoisting and tilting, improving safety, and at the same time saving labor intensity. The main and auxiliary moving seats 3 at both ends of the positioner can realize longitudinal movement and can adapt to magnetic poles of different lengths. In addition, through the main and auxiliary clamping bases 311, the positioner can move up and down along the vertical direction, that is, the Z-axis, and can cooperate with subsequent welding robots and magnetic poles of different heights for welding operations. The main and auxiliary clamping devices 33 cooperate with the workbench 4 to realize the automatic centering of clamping for magnetic poles within 15 tons, reducing labor intensity.

[0130] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A magnetic pole welding positioner for large generators, characterized in that: include: Base, main moving base, auxiliary moving base, main clamping base, flip reducer, flip drive motor, main rotating base, main clamping device, auxiliary clamping base, auxiliary rotating base, auxiliary clamping device and workbench, The main moving seat, the workbench and the auxiliary moving seat are sequentially arranged on the base along the longitudinal direction, and a first guide rail and a rack are arranged on the base. The first guide rail and the rack are arranged parallel to each other along the longitudinal direction. The main moving seat and the auxiliary moving seat are both arranged on the first guide rail, and the first guide rail is used to make the main moving seat and the auxiliary moving seat reciprocate along the longitudinal direction. The main moving seat and the auxiliary moving seat are respectively provided with a main driving motor and an auxiliary driving motor, and the main driving motor and the auxiliary driving motor are respectively connected to the rack through corresponding transmission gears. The main clamping base is arranged at the main movable seat, and the auxiliary clamping base is arranged at the auxiliary movable seat. The main clamping base is connected to the main moving base through a main transmission device, and the main transmission device is driven by a main lifting motor to make the main clamping base move up and down relative to the main moving base. The auxiliary clamping base is connected to the auxiliary moving base through an auxiliary transmission device, and the auxiliary transmission device is driven by an auxiliary lifting motor to make the auxiliary clamping base move up and down relative to the auxiliary moving base. The main rotating seat is rotatably connected to the main clamping base, the flip drive motor is connected to the flip reducer, the flip reducer is connected to the main rotating seat, the main clamping device is arranged at the main rotating seat, the auxiliary rotating seat is rotatably connected to the auxiliary clamping base, the auxiliary clamping device is arranged at the auxiliary rotating seat, the main rotating seat and the auxiliary rotating seat are used to rotate around the longitudinal direction, the auxiliary clamping device is arranged opposite to the main clamping device, and the auxiliary clamping device and the main clamping device are used to clamp and fix the two ends of the magnetic pole of a large generator.

2. The magnetic pole welding positioner according to claim 1, characterized in that: The main moving seat comprises a base and a double-column structure, wherein the base is arranged on the first guide rail, the main driving motor is mounted on the base, and the double-column structure is fixed on the base. The main transmission comprises: a main worm reducer, a screw shaft and a main moving nut. The main worm reducer is arranged on the top of the double-column structure and connected to the main drive motor. The screw shaft is vertically arranged between the two columns of the double-column structure. The top end of the screw shaft is connected to the main worm reducer. The main moving nut is sleeved outside the screw shaft and connected to the main moving seat. The worm wheel in the main worm reducer is coaxially connected with the screw shaft, a self-lubricating thrust bearing is arranged at the worm wheel shaft in the main worm reducer, a bearing seat is arranged at the top of the double-column structure, a cylindrical roller bearing and a top thrust ball bearing are arranged in sequence from top to bottom in the bearing seat, the cylindrical roller bearing and the top thrust ball bearing are sleeved outside the top end of the screw shaft, the cylindrical roller bearing and the top thrust ball bearing are separated by a shaft shoulder, the bottom end of the screw shaft is installed at the bottom of the double-column structure through a shaft sleeve, and the shaft sleeve cooperates with the bottom end of the screw shaft through a bottom thrust ball bearing; The main moving seat and the auxiliary moving seat have the same structure, and the main transmission device and the auxiliary transmission device have the same structure.

3. The magnetic pole welding positioner according to claim 2, characterized in that: The main clamping base is equipped with a nut fixing seat, the main movable nut is a stepped shaft structure, and the big end of the main movable nut is clamped under the nut fixing seat. The main clamping base is equipped with a nut fixing seat, a rotation-stopping frame, a fall-stopping frame and a safety nut. The rotation-stopping frame is detachably connected to the bottom of the nut fixing seat by bolts. The main movable nut is arranged between the rotation-stopping frame and the nut fixing seat. The main movable nut is detachably connected to the rotation-stopping frame. The anti-fall frame is arranged on the top of the nut fixing seat, and the anti-fall frame includes a left arm body and a right arm body, and the tops of the left arm body and the right arm body are provided with a docking portion protruding toward the middle, the screw shaft is arranged between the left arm body and the right arm body, the safety nut is sleeved outside the screw shaft and is arranged above the main moving nut, and is arranged between the left arm body and the right arm body, and the docking portion is arranged above the safety nut; The main clamping base is a rectangular plate-shaped structural member, and a second guide rail is arranged at each column of the double-column structure, and the second guide rail is arranged vertically. The wide side of the main clamping base is arranged upright, and a side plate surface of the main clamping base is matched with the two second guide rails. The nut fixing seat is arranged on a side plate surface of the main clamping base and is arranged close to a side wide side of the main clamping base. The flip reducer is arranged on one side of the main clamping base, and the flip reducer is arranged close to the other side of the main clamping base. A transmission reducer is arranged between the flip drive motor and the flip reducer. The transmission reducer is arranged at the other wide side of the main clamping base. Both the flip reducer and the transmission reducer are worm gear reducers.

4. The magnetic pole welding positioner according to claim 3, characterized in that: The main rotating seat is arranged on the other side plate surface of the main clamping base, a geared slewing bearing is arranged between the main rotating seat and the main clamping base, the main clamping base is connected to the inner ring of the geared slewing bearing, the main rotating seat is connected to the outer ring of the geared slewing bearing, the output shaft of the flip reducer is fixed with an output gear, the output gear is meshed with the outer ring gear of the geared slewing bearing through an intermediate gear for transmission, The rotation connection structure between the main rotating seat and the main clamping base is the same as the rotation connection structure between the auxiliary rotating seat and the auxiliary clamping base.

5. The magnetic pole welding positioner according to claim 4, characterized in that: The main rotating seat comprises a back plate and two side plates arranged vertically, the outer ring of the toothed slewing bearing is arranged on the back side of the back plate, the two side plates are arranged in parallel in front of the back plate, the side plates are C-shaped, the top ends of the two side plates are fixed with a horizontal upper support plate, the bottom ends of the two side plates are fixed with a horizontal lower support plate, the two side plates and the upper support plate constitute the upper beam of the main rotating seat, the two side plates and the lower support plate constitute the lower beam of the main rotating seat, the two side plates and the back plate constitute the vertical beam of the main rotating seat, and the lower support plate is arranged at the top surface of the lower beam. The lower beam is provided with a plurality of vertical rib plates and transverse rib plates, the plurality of vertical rib plates are arranged in parallel with the back plate and connect the two side vertical plates together, the plurality of vertical rib plates are arranged in sequence along the length direction of the lower beam, the transverse rib plate is arranged at the bottom surface of the lower beam and connects the two side vertical plates together, and the transverse rib plate extends along the length direction of the lower beam, The upper beam is provided with an oblique rib plate, the oblique rib plate connects the two side vertical plates together, the oblique rib plate extends along the upper inclined edge of the side vertical plate, the upper inclined edge of the side vertical plate is such that the upper inclined edge of the side vertical plate gradually approaches the upper support plate as it moves away from the back plate. The plate surfaces of the oblique rib plate and the plurality of vertical rib plates are all provided with through holes.

6. The magnetic pole welding positioner according to claim 5, characterized in that: The main clamping device comprises: two horizontal clamping mechanisms and a vertical clamping mechanism, the vertical clamping mechanism is arranged at the upper beam, the fixing plate of the vertical clamping mechanism is used to push the magnetic pole downward, the two horizontal clamping mechanisms are arranged at the lower beam relatively, and the lateral pushing parts of the two horizontal clamping mechanisms are used to push and clamp the magnetic pole from the left and right sides; The main rotating seat and the auxiliary rotating seat have the same structure, and the main clamping device and the auxiliary clamping device have the same structure.

7. The magnetic pole welding positioner according to claim 6, characterized in that: The vertical clamping mechanism comprises: a hydraulic cylinder mechanism and a guide column, the hydraulic cylinder mechanism is fixed to the upper support plate, the piston rod of the hydraulic cylinder mechanism passes through the upper support plate from top to bottom and is connected to the fixed plate, the fixed plate is horizontally arranged, the bottom end profile of the cross section of the fixed plate is in an inverted V shape, the cross section of the fixed plate is perpendicular to the axial direction of the main rotating seat, the guide column is erected on the top surface of the fixed plate, and the guide column is inserted into the upper support plate; The horizontal clamping mechanism includes: a transverse bracket, a push-up motor, a push-up screw and a transverse guide rail. Each of the transverse brackets is arranged in a side vertical plate inserted in the lower beam, and the push-up motor is arranged in the transverse bracket; the push-up screw is arranged in the transverse bracket, the push-up screw is connected to the push-up motor, the push-up screw extends in the transverse direction, and the push-up screw is connected to the transverse push-up part through a screw transmission; the transverse guide rail is arranged on the transverse bracket, the transverse guide rail is arranged parallel to the push-up screw, the transverse push-up part is arranged on the transverse guide rail, and the transverse push-up part is used to reciprocate along the push-up guide rail. The transverse bracket is provided with an elongated through hole, the elongated through hole is arranged parallel to the ejecting screw, the ejecting screw is arranged below the elongated through hole, the bottom end of the transverse ejecting portion is provided with a downwardly protruding limit protrusion, the limit protrusion is arranged in the elongated through hole, the ejecting screw passes through the limit protrusion and cooperates with each other in spiral transmission; the two transverse brackets are arranged parallel to each other, and one transverse bracket is arranged above the other transverse bracket.

8. The magnetic pole welding positioner according to claim 7, characterized in that: The lateral pushing top portion includes: a pad, a bottom plate and a side clamping plate; the pad is detachably arranged on the pushing guide rail, and the limiting protrusion is arranged on the bottom surface of the pad; the bottom plate is detachably arranged on the pad, and the bottom plate is a square plate and is arranged horizontally; the top plate surface of the lower support plate is flush with the top plate surface of the bottom plate, the side clamping plate is vertically arranged at the center of the bottom plate, the side clamping plate is arranged along the longitudinal direction, and the side clamping plate is connected to the bottom plate.

9. The magnetic pole welding positioner according to claim 8, characterized in that: The workbench is a rectangular parallelepiped structure, and a plurality of rollers are arranged on the top surface of the workbench. The plurality of rollers extend in the longitudinal direction, and the rollers are used to rotate relative to the workbench; The upper and lower ends of the double-column structure are respectively provided with vertical limit switches, and the vertical limit switches are used to limit the vertical movement range of the main clamping base. The longitudinal ends of the base are respectively provided with longitudinal limit switches, and the longitudinal limit switches are used to limit the longitudinal movement range of the main movable seat and the auxiliary movable seat. The bottom plate and the fixing plate are both nylon plates.

10. A method for using a positioner, characterized in that: The positioner is a magnetic pole welding positioner as claimed in any one of claims 1 to 9, and the method of use comprises: The main movable seat and the auxiliary movable seat are moved away from the workbench in the longitudinal direction, so that the distance between the main movable seat and the auxiliary movable seat is greater than the length of the magnetic pole, the clamping height of the main clamping device and the auxiliary clamping device is kept consistent with the height of the workbench, and the main clamping device and the auxiliary clamping device are kept in a fully opened state; The magnetic pole is hoisted above the workbench by a crane, so that the magnetic pole is suspended longitudinally at the center between the main movable seat and the auxiliary movable seat, and the magnetic pole is not in place but in a suspended state; Lowering the magnetic pole and adjusting the distance between the main movable seat and the auxiliary movable seat at the same time, so that both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device which are kept in a fully opened state, and at this time, the magnetic pole is still in a suspended state; Continue to lower the height of the magnetic pole by using a crane, and adjust the positions of the sides of the two ends of the magnetic pole relative to the main clamping device and the auxiliary clamping device in real time, so that the two ends of the magnetic pole completely fall into the main clamping device and the auxiliary clamping device; Confirm whether the bottom angles of both ends of the magnetic pole fall into the main clamping device and the auxiliary clamping device, and place the magnetic pole on the workbench; The main clamping device and the auxiliary clamping device clamp and fix the two ends of the magnetic pole in the longitudinal direction, and the main rotating seat and the auxiliary rotating seat are synchronously raised; The rotation speed of the flip driving motor is adjusted according to the height difference between the axis of the magnetic pole and the center of the rotation axis of the main and auxiliary rotating seats during the rotation process.

Images