Impeller welding platform

Abstract

The present application relates to a kind of impeller welding platform, comprising: base;Positioning centering device is set to base, positioning centering device includes the support component for carrying impeller and at least three positioning components, each positioning component can be moved along radial synchronous, for with the outer periphery of impeller and front cover plate contact to adjust the centering of both, by in multiple positioning components synchronous along radial movement to the outer periphery of clamping fixed impeller and front cover plate, so it can be realized quickly positioning and centering, positioning step is simple, in the process of impeller positioning, by the rolling contact of ball mechanism in first state with impeller, so as to facilitate the movement of impeller, after positioning is completed, ball mechanism in second state drops, support portion and impeller static friction contact, so as to impeller is stably supported, under the depression of pressing device, impeller and front cover plate are pressed, ensure the precision of subsequent welding.

Description

Technical Field

[0001] This invention relates to the field of impeller pump welding technology, and in particular to an impeller welding platform. Background Technology

[0002] In modern petrochemical production processes, pumps with small flow rates and high heads are widely used. Their impellers have narrow and long flow channels and large blade wrap angles, which makes casting difficult and cleaning sand after casting difficult. Therefore, the front cover plate and impeller (including blades and rear cover plate) are often cast separately and then assembled together by welding to form a complete closed impeller.

[0003] In traditional techniques, welding the front cover plate to the blades involves using auxiliary tools to place the impeller front cover plate on the impeller, with the front cover plate abutting against the edge of the impeller blades and the circumference of the front cover plate aligned with the circumference of the impeller. Finally, the impeller and the front cover plate are clamped and fixed securely before welding. The auxiliary tools mainly include positioners, clamping mechanisms, and clamping bodies. During the welding operation, multiple different clamping mechanisms and positioners installed on the clamping body are used to position and fix the impeller and the front cover plate, ensuring accurate positioning between the two and facilitating subsequent welding operations.

[0004] However, current traditional auxiliary tools are cumbersome in positioning the impeller and front cover plate. Especially when positioning and centering some large impellers, the friction between the impeller and the auxiliary tool is large, which makes it difficult to move the impeller, affecting the positioning and centering efficiency. It also causes great wear on the impeller surface during the movement of the impeller. Summary of the Invention

[0005] Therefore, it is necessary to address the problems of cumbersome positioning steps and inconvenient positioning and movement of large-mass impellers in traditional impeller welding auxiliary tools, and to provide an impeller welding platform that can quickly position and center the impeller and front cover plate, and has low friction when positioning and centering large-mass impellers.

[0006] An impeller welding platform, comprising: Base; A positioning and centering device is disposed on the base. The positioning and centering device includes a support assembly for supporting the impeller and at least three positioning assemblies. Each positioning assembly can move synchronously in the radial direction to contact the outer periphery of the impeller and the front cover plate to adjust and center them. The support assembly includes a support part and at least three ball bearing mechanisms arranged non-collinearly along the same horizontal plane. The ball bearing mechanisms can be raised and lowered in the vertical direction and have a first state and a second state. In the first state, the top of the ball bearing mechanism is higher than the top support surface of the support portion, and the top of the ball bearing mechanism can roll into contact with the impeller to support the impeller, so that the impeller can move freely in the radial direction; in the second state, the top of the ball bearing mechanism is lower than the top support surface of the support portion, and the top support surface of the support portion can support the impeller. A clamping device is disposed on the base and located above the positioning and centering device. The clamping device can be raised and lowered in the vertical direction to contact the upper surface of the front cover plate and cooperate with the support assembly to clamp the front cover plate and the impeller.

[0007] In one embodiment, the positioning and centering device further includes a linkage component, and each of the positioning components is connected to the linkage component so as to control the synchronous radial movement of each of the positioning components through the movement of the linkage component.

[0008] In one embodiment, the linkage component is a rotating platform rotatably connected to the base, and the support component is disposed on the rotating platform.

[0009] In one embodiment, the positioning component includes a swing arm and an adjusting positioning element, one end of the swing arm is rotatably connected to the base, and the adjusting positioning element is disposed on the free end of the swing arm; The rotating platform is rotatably connected to the base. The rotating platform has a guide groove that is inclined to its circumference and corresponds to the positioning component. The free end of the swing rod is slidably connected to the guide groove so that the rotation of the rotating platform drives the free end of the swing rod to move radially.

[0010] In one embodiment, the adjusting positioning element is a roller rotatably disposed at the free end of the rocker arm.

[0011] In one embodiment, the adjusting and positioning component includes a roller, a pin, and a sliding sleeve. The pin is vertically fixed to the free end of the rocker arm. The sliding sleeve is sleeved on the pin and can slide vertically along the pin. The roller is disposed on the sliding sleeve. A limiting member is provided at the upper end of the pin to restrict the sliding sleeve from sliding upward. An elastic member is provided on the rocker arm to abut against the lower surface of the roller. The deformation of the elastic member allows the roller to move downward. The compressible stroke of the elastic member in the vertical direction is greater than the lifting stroke between the first and second states of the ball bearing mechanism.

[0012] In one embodiment, the support portion is positioned directly opposite the clamping device.

[0013] In one embodiment, the support portion is arranged in a ring shape.

[0014] In one embodiment, the top support surface of the support portion has a plurality of downwardly recessed grooves, the grooves being correspondingly provided with the ball bearing mechanism, the ball bearing mechanism being disposed within the bottom wall of the groove and being vertically movable.

[0015] In one embodiment, the ball mechanism includes a ball seat and a supporting ball. The supporting ball is movably disposed on the top of the ball seat in a vertical direction. The supporting ball can be vertically raised and lowered under the control of an air source to realize the first state and the second state of the ball mechanism.

[0016] The aforementioned impeller welding platform achieves rapid positioning and centering by simultaneously moving multiple positioning components radially to clamp and fix the impeller and the outer periphery of the front cover plate. The positioning process is simple. During impeller positioning, the ball bearing mechanism in the first state rolls into contact with the impeller to facilitate its movement. After positioning, the ball bearing mechanism in the second state descends, and the support part makes static friction contact with the impeller to provide stable support. Under the pressure of the clamping device, the impeller is pressed against the front cover plate to ensure the subsequent welding accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the working state of an impeller welding platform provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an impeller welding platform provided in an embodiment of this application; Figure 3 A bottom view of an impeller welding platform provided in an embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of a clamping device provided in an embodiment of this application; Figure 5 A cross-sectional schematic diagram of the positioning component in an impeller welding platform provided in an embodiment of this application; Figure 6 For this application Figure 2 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the ball bearing mechanism in an impeller welding platform provided in an embodiment of this application.

[0018] Reference numerals: 1. Base; 2. Positioning and centering device; 20. Positioning assembly; 201. Adjusting and positioning component; 2010. Roller; 2011. Fastening nut; 2013. Limiting ring; 2014. Fastening screw; 2015. Pin; 2016. Sliding sleeve; 2017. Balloon; 2018. Balloon base; 202. Swing rod; 2021. Lifting part; 2022. Rotating connection part; 2023. Guide part; 21. Linkage assembly; 211. Rotary table; 212. Guide groove; 22. Support assembly; 221. Ball mechanism; 2210 1. Supporting ball bearing; 2211. Ball bearing seat; 2212. Air inlet; 2213. Movable groove; 222. Support part; 223. Groove; 3. Pressing device; 31. Crossbeam; 32. Mounting bracket; 321. Bracket; 322. Screw; 323. First through groove; 33. Pressing mechanism; 330. Pin; 331. Fixing nut; 332. Pressing spring; 333. Top rod; 334. Hollow stud; 34. Pressure plate; 341. Second through groove; 35. Adjusting mechanism; 351. Supporting spring; 352. Bellows; 353. Positioning nut. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See Figure 1 , Figure 2 , Figure 1 This diagram illustrates the working state of an impeller welding platform according to an embodiment of the present invention. Figure 2 This diagram illustrates the structure of an impeller welding platform according to an embodiment of the present invention. The impeller welding platform includes a base 1, a positioning and centering device 2, and a clamping device 3. Among them, base 1 serves as the base of the welding platform, and a power module and a control module are integrated on it; like Figure 3 As shown, Figure 3 The diagram shows a bottom view of an impeller welding platform provided in an embodiment of the present invention. Specifically, the power module includes a motor, which is fixed on the base 1. Its output axis passes through the base 1 and is connected to the positioning and centering device 2. The control module is used to control the power drive of the power module.

[0026] The positioning and centering device 2 is disposed on the base 1. The positioning and centering device 2 includes a support component 22 for supporting the impeller and a positioning component 20. In this embodiment, the number of positioning components is configured to be three. It should be noted that the number of positioning components should not be less than three, and the minimum distance between adjacent positioning components should not be less than the diameter of the impeller. Each positioning component 20 can move synchronously in the radial direction to contact the outer periphery of the impeller and the front cover plate to adjust and center them. It should be understood that the centering of the impeller and the front cover plate means that their central axes coincide and their circumferences are aligned. Preferably, the positioning components are evenly distributed around the circumference. In this embodiment, the base 1 is circular, and the three positioning components are evenly distributed around the axis of the base 1. It should be understood that when the positioning components are evenly distributed around the circumference, regardless of the diameter of the impeller and the front cover, when the positioning components clamp the impeller and the front cover, the axis of the impeller and the front cover coincides with the axis of the base 1. This is so that the positioning components adjust and center the impeller and the front cover. This setting ensures that the position of the impeller and the front cover is determined each time they are positioned, and is always at the center of the base, which is beneficial for the clamping device 3 to clamp the impeller and the front cover. Support assembly 22 includes a support portion 222 and at least three ball bearing mechanisms 221 arranged non-collinearly along the same horizontal plane. The ball bearing mechanisms 221 are capable of vertical lifting and lowering and have a first state and a second state. In the first state, the top of the ball bearing mechanism 221 is higher than the top support surface of the support portion 222. This top support surface is preferably planar and horizontally arranged, and the top of the ball bearing mechanism 221 can roll into contact with the impeller to support the impeller, allowing the impeller to move freely radially. The rolling contact between the ball bearing mechanism 221 and the impeller lowers the support assembly. The friction between the component and the impeller, especially when positioning a large-mass impeller, facilitates the movement of the large-mass impeller, which not only speeds up the positioning and centering efficiency, but also reduces the mutual wear between the impeller and the support component; in the second state, the top of the ball mechanism 221 is lower than the top support surface of the support part 222, and the top support surface of the support part 222 can support the impeller. When the top support surface of the support part abuts against the impeller, the support force and support strength of the support component on the impeller are improved. Together with the clamping device 3, the impeller and the front cover plate can be clamped better. The clamping device 3 is set on the base 1 and located above the positioning and centering device 2. The clamping device 3 can be raised and lowered in the vertical direction to contact the upper surface of the front cover plate and cooperate with the support component 22 to clamp the front cover plate and impeller.

[0027] By simultaneously moving multiple positioning components 20 radially to clamp and fix the impeller and the outer periphery of the front cover plate, rapid positioning and centering can be achieved. The positioning steps are simple. During the impeller positioning process, the ball bearing mechanism 221 in the first state rolls into contact with the impeller to facilitate its movement. After positioning is completed, the ball bearing mechanism 221 in the second state descends, and the support part 222 makes static friction contact with the impeller to provide stable support for the impeller. Under the pressure of the clamping device 3, the impeller is pressed against the front cover plate to ensure the subsequent welding accuracy.

[0028] Specifically, refer to Figure 4 As shown, Figure 4 A cross-sectional schematic diagram of a clamping device provided in an embodiment of the present invention is shown. This embodiment provides a clamping device 3 for clamping an impeller and a front cover plate, including a crossbeam 31, a mounting bracket 32, at least three pressing mechanisms 33 and a pressure plate 34. The crossbeam 31 is fixed with a drive source that can move up and down in the vertical direction. In this embodiment, the drive source is a cylinder. Specifically, refer to Figure 3 As shown, the crossbeam 31 and the base 1 are rotatably connected by a shaft. The shaft at the bottom end of the crossbeam 31 passes downward through the base 1. A cylinder 2 is installed in the power module on the base 1. A crossbar is horizontally fixed at the lower end of the shaft at the bottom end of the crossbeam 31 and is connected to the piston rod end of the cylinder 2. That is, the crossbar swings by extending and retracting the piston rod of the cylinder 2, thereby controlling the shaft at the bottom end of the crossbeam 31 to rotate, thus driving the crossbeam 31 to rotate. When placing the large impeller and the front cover plate, the crossbeam 31 can be rotated so that the pressing device 3 is away from the positioning and centering device 2, so that the two are misaligned, so as to place the large impeller and the front cover plate.

[0029] Preferably, a limit switch is provided on the base 1 to detect whether the rotation and reset of the crossbeam 31 are accurately in place, and to feed back to the control module to drive the start and stop of the cylinder 2.

[0030] It should be clarified that the lifting and lowering of the clamping device 3 is not only achieved by the cylinder drive. The clamping device 3 can also complete the vertical lifting and lowering action by the drive method that can achieve linear motion, such as gear and rack drive, screw and nut drive, cam mechanism drive, etc.

[0031] Mounting bracket 32 ​​is fixed to the lifting end of the drive source; In this embodiment, three pressing mechanisms 33 are provided, and the three pressing mechanisms 33 are not collinear. Each pressing mechanism 33 includes a pin 330, a push rod 333, an elastic part, and an adjusting seat. The adjusting seat is adjustablely fixed to the mounting frame 32 in the vertical direction. The pin 330, the elastic part, and the push rod 333 are arranged in the adjusting seat from top to bottom. The lower end of the pin 330 is slidably connected to the adjusting seat, and the upper end protrudes upward from the adjusting seat. The upper end of the push rod 333 is slidably connected to the adjusting seat in the vertical direction, and the lower end protrudes downward from the adjusting seat. The elastic part is located between the pin 330 and the push rod 333, and supports the pin 330 and the push rod 333 axially. The pressure plate 34 is located on the upper side of the mounting bracket 32 ​​and is adjustablely fixed to the lifting end of the drive source in the vertical direction. The pin 330 is fixed relative to the pressure plate 34 in the vertical direction.

[0032] With this configuration, the mounting bracket 32 ​​is driven to rise and fall vertically by the drive source, thereby driving the three pressing mechanisms 33 to rise and fall synchronously until the lower end of each push rod abuts against the front cover plate. With the support of the positioning and centering device 2, the front cover plate and the impeller are pressed together, thereby ensuring that the cover plate and the impeller remain stable during the welding process. Because some front cover plates have special shapes, their surfaces may be curved or have special structures with protrusions or depressions. Since the clamping mechanisms in traditional impeller welding auxiliary tools are all at the same height and cannot be adjusted, it is possible that one clamping mechanism has already pressed the special-shaped front cover plate, while the other clamping mechanisms are still a certain distance from the depressions. This leads to pressure leakage and affects the clamping stability of the front cover plate and impeller. Alternatively, some clamping mechanisms may first contact the protrusions of the front cover plate and press the protrusions, while the remaining clamping mechanisms may still be in contact with the surface of the front cover plate, which will also result in pressure leakage.

[0033] In this invention, the adjusting seat can be adjusted vertically relative to the mounting bracket 32, so that the height of the push rod 333 can be adjusted with the adjusting seat, ensuring that the distance between the lower end of each push rod 333 and the surface of the front cover plate, including the special protrusion structure, is consistent. This ensures that each push rod 333 simultaneously abuts against the surface of the front cover plate, including the special protrusion or depression structure, under the drive of the drive source, ensuring that the pressure of the pressing device 3 on the front cover plate and impeller is balanced and stable, and avoiding the occurrence of leakage and overpressure.

[0034] Furthermore, the adjusting seat is also adjustablely fixed to the mounting bracket 32 ​​in the horizontal direction, and the pin 330 is slidably connected to the pressure plate 34 in the horizontal direction.

[0035] This design allows the push rod 333 to adjust its downward position horizontally along with the adjusting seat, making it more suitable for front cover plates with special structures. It also allows the clamping device 3 to adapt to the clamping work of front cover plates and impellers of different sizes.

[0036] Furthermore, the adjustment seat is hollow inside and has openings at both the top and bottom; The lower end of the pin 330 is located inside the adjusting seat and is slidably connected to the adjusting seat, while the upper end protrudes upward from the adjusting seat. The elastic part is located inside the adjusting seat; The upper end of the push rod 333 is located inside the adjusting seat and is slidably connected to the adjusting seat in the vertical direction, while the lower end protrudes downward from the adjusting seat.

[0037] The hollow adjustment seat can guide the sliding of the pin 330 and the push rod 333, and can also be used to accommodate the elastic part.

[0038] Furthermore, each adjustment seat includes a hollow stud 334 and a fixing member. The hollow stud 334 vertically penetrates the mounting frame 32, and the fixing member can clamp and fix it to the mounting frame 32 so that the adjustment seat is fixed to the mounting frame 32 in both the vertical and horizontal directions.

[0039] Specifically, the hollow stud 334 is a tubular structure with a hollow interior and openings at both the top and bottom. The lower end of the pin 330 is located inside the upper end of the hollow stud and is slidably connected to it. The opening at the lower end of the hollow stud 334 is smaller than the inner diameter of its internal cavity. The upper end of the push rod 333 extends radially outward to form a sliding part. The sliding part is slidably connected to the internal cavity of the hollow stud 334. The diameter of the sliding part is larger than the opening at the lower end of the hollow stud 334. This ensures that the upper end of the push rod 333 is restricted to sliding within the hollow stud 334. An elastic part is provided between the sliding part and the pin 330. This arrangement ensures that the push rod 333 will not detach from the hollow stud 334.

[0040] Furthermore, the fixing components are two fixing nuts 331 located on the upper and lower sides of the mounting bracket 32 ​​respectively. The hollow stud 334 has external threads on its outer periphery. The two fixing nuts 331 are threadedly connected to the hollow stud 334. Through the self-locking action between the hollow stud 334 and the two fixing nuts 331, the hollow stud 334 is fixed to the adjusting seat in the vertical direction. Two fixing nuts 331 clamp the mounting bracket 32 ​​from both sides along the axial direction so that the hollow stud 334 is fixed to the adjusting seat in the horizontal direction.

[0041] In some embodiments, the fastener can also be a locking retaining ring with a threaded hole on its outer circumference. The locking retaining ring is fitted onto the hollow stud 334. In this embodiment, the hollow stud 334 is an optical axis with no threads on its outer circumference. By screwing a screw into the threaded hole and abutting against the outer circumference of the hollow stud 334, the locking retaining ring is fixed onto the hollow stud 334. Two such locking retaining rings are provided and are located on the upper and lower sides of the mounting bracket 32 ​​respectively. The mounting bracket 32 ​​is clamped from the upper and lower sides by the two locking retaining rings, thus fixing the hollow stud 334 onto the mounting bracket 32.

[0042] In some embodiments, the fastener may also be an optical axis fixing ring, which is annular and has a slit coplanar with the axis along the radial direction. Threaded holes are provided on both sides of the slit. The optical axis fixing ring is fitted onto the hollow stud 334. In this embodiment, the hollow stud 334 is the optical axis. By screwing the screw into the threaded holes on both sides of the slit, the size of the slit of the optical axis fixing ring can be reduced, thereby clamping it onto the hollow stud 334. There are two such optical axis fixing rings, which are respectively located on the upper and lower sides of the mounting frame 32. The mounting frame 32 is clamped from the upper and lower sides by the two optical axis fixing rings, thus fixing the hollow stud 334 onto the mounting frame 32.

[0043] Furthermore, the mounting bracket 32 ​​includes a bracket 321 and a connecting rod vertically fixed to the bracket 321. The connecting rod is vertically arranged and fixed to the lifting end of the drive source. The bracket 321 has a first through groove 323 corresponding to the pressing mechanism 33. The adjusting seat passes vertically through the first through groove 323 and can move horizontally along the first through groove 323. The setting of the first through groove 323 can limit the sliding direction of the pressing mechanism 33, and make it easy for the fixing member to be clamped and fixed on the upper and lower sides of the edge of the first through groove 323.

[0044] Furthermore, each of the first through slots 323 is evenly distributed circumferentially around the axis of the connecting rod, and the lines connecting each of the first through slots 323 along their own length direction intersect at the axis of the connecting rod. This arrangement makes the pressing mechanism 33 more evenly distributed, ensuring that the pressure distribution is uniform when the pressing device presses down on the front cover plate, thus improving stability.

[0045] Furthermore, the clamping device also includes an adjustment mechanism 35. The pressure plate 34 is located on the upper side of the bracket 321, and the connecting rod passes through the pressure plate 34 upward. The distance between the pressure plate 34 and the bracket 321 can be adjusted by the adjustment mechanism 35. By adjusting the distance between the pressure plate 34 and the bracket 321, the distance between the pin 330 and the push rod 333 can be adjusted, thereby adjusting the compression amount of the elastic part and thus adjusting the elastic force of the elastic part on the push rod 333.

[0046] Furthermore, the adjustment mechanism 35 includes a support spring 351 and a locking member. The locking member is located on the upper side of the pressure plate 34 and can move vertically along the connecting rod. The locking member can be locked and fixed on the connecting rod. The support spring 351 is located between the pressure plate 34 and the bracket 321. The support spring 351 is covered with a corrugated tube 352 for protection. The upper and lower ends of the support spring 351 abut against the pressure plate 34 and the bracket 321. The pressure plate 34 is fixedly mounted on the mounting bracket 32 ​​by locking the locking member and supporting the support spring 351.

[0047] Furthermore, the connecting rod is a screw 322 with external threads on its outer circumference; The locking element is a positioning nut 353 with internal threads. The positioning nut 353 is locked to the screw 322 by the self-locking action between the positioning nut 353 and the screw 322.

[0048] In some embodiments, the screw 322 can be an optical axis, and the locking member can be configured as a locking retaining ring or an optical axis fixing ring, so that the locking member can also be locked and fixed on the screw 322.

[0049] In some embodiments, the screw 322 is an optical axis, and multiple axially evenly distributed concave holes or radially penetrating through holes can be opened on its outer periphery. In this embodiment, the locking member is a rod-shaped positioning pin, which is embedded in the concave hole or through hole, and the positioning pin is at least partially located on the upper side of the pressure plate 34. With this arrangement and the elastic force of the support spring 351, the position of the pressure plate 34 on the screw 322 can be adjusted.

[0050] Furthermore, a second through groove 341 corresponding to the first through groove 323 is provided on the pressure plate 34, and the second through groove 341 is arranged parallel to the first through groove 323; The upper end of the pin 330 is slidably connected to the second through groove 341 in the horizontal direction. In this embodiment, the second through groove 341 is open at one end away from the connecting rod. The upper circumference of the pin 330 is radially contracted inward to form a neck. The diameter of the neck is smaller than the diameter of other positions of the pin 330. The width of the second through groove 341 is the same as the diameter of the neck, so that the neck of the pin 330 is inserted into the second through groove 341 through the open end of the second through groove 341 and slides therein.

[0051] Furthermore, the elastic part is a compression spring 332, which is located inside the hollow stud 334, and its upper and lower ends are in contact with the lower end of the pin 330 and the upper end of the push rod 333, respectively.

[0052] In some embodiments, the elastic part can also be a columnar rubber with its upper and lower ends abutting against the pin 330 and the push rod 333 respectively. There is a gap between its outer periphery and the inner wall of the hollow stud 334 to provide it with deformation space. In this way, by adjusting the distance between the pin 330 and the push rod 333, the deformation of the rubber can be changed, thereby changing the magnitude of the thrust of the elastic part on the push rod 333.

[0053] In some embodiments, the elastic part can also be air in the sealed space between the pin 330 and the push rod 333. In this embodiment, a sealing ring needs to be added to the outer periphery of the pin 330 and the hollow stud 334 that are slidably connected, so as to ensure the seal between the pin 330 and the hollow stud 334. At the same time, a sealing ring also needs to be added to the outer periphery of the sliding part extending radially outward at the upper end of the push rod 333, so as to ensure the seal between the upper end of the push rod 333 and the hollow stud 334. With this arrangement, the space between the pin 330 and the push rod 333 is a sealed space. By adjusting the distance between the pin 330 and the push rod 333, that is, changing the compression of the sealed space, the magnitude of the thrust of the air pressure in the sealed space on the push rod 333 is realized.

[0054] When the surface of the front cover plate is flat, the distance between each pressing mechanism 33 and the screw 322 can be adjusted according to the diameter of the front cover plate. At the same time, it is ensured that the distance between each pressing mechanism 33 and the screw 322 is consistent. The lower ends of the push rods 333 in each pressing mechanism 33 are flush. When the cylinder drives the pressing device 3 to descend, the lower ends of each push rod 333 simultaneously contact the front cover plate and press down, thereby pressing the front cover plate and impeller.

[0055] If the stroke of cylinder one is fixed and the material of the front cover plate is relatively hard, the distance between the pressure plate 34 and the bracket 321 can be reduced, thereby increasing the compression of the lower spring 332, which in turn increases the pressure of the push rod 333 on the front cover plate. This increases the clamping force between the front cover plate and the impeller while preventing the push rod 333 from forming an indentation on the front cover plate.

[0056] If the surface of the cover plate is arc-shaped or has a special structure, the relative position of the hollow stud 334 and the bracket 321 in the vertical direction can be adjusted axially, thereby adjusting the relative position of the lower end of the push rod 333 and the surface of the front cover plate. This ensures that the lower end of each push rod 333 is at the same distance from the surface of the front cover plate, thus ensuring that when the pressing device 3 contacts and presses the front cover plate, the lower end of the push rod 333 contacts the surface of the front cover plate, including the special structure of the protrusions or depressions, simultaneously, avoiding pressure leakage.

[0057] Furthermore, referring to Figure 2 As shown, the positioning and centering device 2 also includes a linkage component 21. Each positioning component 20 is connected to the linkage component 21 so that the movement of each positioning component 20 is controlled by the movement of the linkage component 21 to move synchronously in the radial direction. This setting improves the synchronization between each positioning component. By using the linkage component 21 to drive each positioning component 20, it is ensured that each positioning component 20 can move accurately and synchronously, thus ensuring the positioning and centering accuracy of the positioning component 20.

[0058] It should be clarified that, in addition to the above-mentioned method of controlling the synchronous movement of each positioning component through the linkage component 21, the synchronous movement of each positioning component can also be controlled by setting a separate drive source. For example, a cylinder or other drive source that can achieve linear movement can be set on one side of each positioning component, and the control module on the base can synchronously control and drive these drive sources to achieve the synchronous movement of each positioning component 20.

[0059] Furthermore, referring to Figure 2 As shown, the linkage component 21 is a rotating platform 211 rotatably connected to the base 1, which improves the integration of the support component 22 and the rotating platform 211. In this embodiment, the rotating platform 211 is flat. In addition, the rotating platform 211 can also be set as a rod. It should be noted that if the rotating platform 211 is set as a rod, then each end connected to the positioning component must ensure the same motion trajectory and synchronous movement. The support component 22 is set on the rotating platform 211.

[0060] Furthermore, referring to Figure 2 , Figure 5 As shown, Figure 5 A cross-sectional schematic diagram of a positioning component in an impeller welding platform according to an embodiment of the present invention is shown. The positioning component 20 includes a rocker arm 202 and an adjusting positioning member 201. One end of the rocker arm 202 is rotatably connected to the base 1. Specifically, the end of the rocker arm 202 rotatably connected to the base 1 protrudes downward to form a lifting part 2021. The lower end of the lifting part 2021 abuts against the upper surface of the base 1 to separate the rocker arm 202 from the upper surface of the base 1, so that a gap is formed between the two, allowing the edge of the rotary table 211 to move within the gap and avoid mechanical interference. The lower end of the lifting part 2021 protrudes downward to form a rotating connection part 2022, which is rotatably connected to the base 1. The adjusting positioning member 201 is disposed at the free end of the rocker arm 202. Reference Figure 2 , Figure 3As shown, the rotary table 211 is rotatably connected to the base 1. Specifically, the motor on the base 1 is preferably a servo motor or a stepper motor. A worm gear transmission mechanism is connected to the output end of the servo motor or stepper motor. The output shaft of the motor is powered by the worm. The rotary table is rotatably connected to the base 1 via a rotating shaft, which is powered by the worm gear. This allows the worm gear to self-lock after the motor stops, keeping the rotary table stationary. This ensures that the positioning assembly maintains its positioning state after clamping the positioning impeller and the front cover plate. In this embodiment, the rotary table 211 is preferably circular and flat. The rotary table 211 has... There is a guide groove 212 that is inclined to its circumference and corresponds to the positioning component 20. The guide groove 212 is arc-shaped and is inclined to the circumference of the rotating table 211. That is, the distance between the guide groove 212 and the circumference of the rotating table 211 gradually increases from one end to the other. The free end of the rocker arm 202 is slidably connected to the guide groove 212. Specifically, the lower surface of the free end of the rocker arm protrudes downward to form a guide part 2023. The guide part 2023 is embedded downward in the guide groove 212 and can slide along the guide groove 212. The guide groove 212 rotates with the rotating table 211 to control the free end of the rocker arm 202 to move radially.

[0061] Furthermore, the adjusting positioning component 201 is a roller 2010 rotatably mounted on the free end of the rocker arm 202. Specifically, the roller 2010 can be rotatably connected to the free end of the rocker arm 202 via a shaft. The roller 2010 is made of silicone, or a harder metal material can be selected depending on the hardness of the impeller and the front cover plate. This configuration allows the adjusting positioning component 201 to rotate during the process of contacting and positioning the outer circumference of the impeller and the front cover plate, thereby reducing the friction between the adjusting positioning component 201 and the outer circumference of the impeller and the front cover plate, and ensuring the integrity of the circumference of the impeller and the front cover plate.

[0062] Furthermore, referring to Figure 5 As shown, the adjusting positioning component 201 includes a roller 2010, a pin 2015, and a sliding sleeve 2016. The pin 2015 is vertically fixed to the free end of the rocker arm 202. The sliding sleeve 2016 is sleeved on the pin 2015 and can slide vertically along the pin 2015. The roller 2010 is set on the sliding sleeve 2016. The length of the pin 2015 is greater than the length of the sliding sleeve 2016. A limiting component is provided at the upper end of the pin 2015 to restrict the sliding sleeve 2016 from sliding upward. An elastic element is provided on the rocker arm 202 to abut against the lower surface of the roller 2010. The roller 2010 can move downward by the deformation of the elastic element. The compressible stroke of the elastic element in the vertical direction is greater than the lifting stroke between the first and second states of the ball bearing mechanism 221.

[0063] Specifically, after the ball bearing mechanism 221 in the first state lifts the impeller and the front cover plate, each roller 2010, driven by the linkage component 21, synchronously clamps the impeller and the front cover plate inward, completing the positioning and centering of the impeller and the front cover plate. During this process, due to the elasticity of the ball bearing 2017, it lifts the roller 2010 upward to form a gap with the surface of the swing rod 202. The distance between the lower end of the sliding sleeve 2016 and the swing rod 202 is greater than the lifting stroke of the ball bearing mechanism 221 between the first and second states. This means that after the positioning and centering is completed, the roller... When the bead mechanism 221 changes from the first state to the second state, and the clamping device 3 presses the impeller and the front cover plate downward, the impeller and the front cover plate move down to abut against the top support surface of the support part 222. During this process, the friction between the roller 2010 and the outer periphery of the impeller and the front cover plate is always greater than the elastic force of the ball 2017, so the roller 2010 moves down with the impeller and the front cover plate to the support part 222, thereby ensuring that each roller 2010 always clamps the impeller and the front cover plate, and ensuring that the impeller and the front cover plate always maintain accurate positioning and centering during the clamping process.

[0064] In this embodiment, the lower end of the sliding sleeve 2016 extends outward to form a protrusion. The sliding sleeve 2016 passes through the roller 2010. The lower surface of the roller 2010 abuts against the protruding surface at the lower end of the sliding sleeve 2016. The upper end of the sliding sleeve 2016 is provided with threads. A fastening nut 2011 is threadedly connected to the upper end of the sliding sleeve 2016. The fastening nut 2011 abuts against the upper surface of the roller 2010. The roller 2010 is clamped and fixed on the sliding sleeve by the fastening nut 2011 and the protrusion at the lower end of the sliding sleeve 2016.

[0065] Specifically, in this embodiment, the limiting component includes a limiting ring 2013 and a fastening screw 2014. The diameter of the limiting ring 2013 is larger than the diameter of the sliding sleeve 2016. A threaded hole is opened at the upper end of the pin 2015. The limiting ring 2013 is placed at the upper end of the pin 2015. The fastening screw 2014 passes through the limiting ring 2013 and is screwed into the upper end of the pin 2015, thereby fixing the limiting ring 2013 to the upper end of the pin 2015, thereby restricting the roller 2010 from sliding out of the pin 2015.

[0066] Specifically, in this embodiment, the elastic element includes a balloon base 2018 and a balloon 2017 that is rolled on top of it. The balloon base 2018 is fitted and fixed inside the upper surface of the swing rod 202 and located below the roller 2010. A hemispherical groove for the balloon 2017 to move is opened in the upper surface of the balloon base 2018. Lubricating grease is applied between the balloon 2017 and the wall of the hemispherical groove so that the balloon 2017 can rotate freely in the hemispherical groove. The balloon 2017 is a hollow sphere made of silicone. The height that the balloon 2017 lifts the roller 2010 is greater than the height difference between the first state and the second state of the ball bearing mechanism 221. That is, during the process of the ball bearing mechanism 221 changing from the second state to the first state, the balloon 2017 deforms and the roller 2010 moves down. When the ball bearing mechanism 221 is in the second state, there is still a movement margin between the lower surface of the sliding sleeve 2016 and the swing rod 202.

[0067] Furthermore, referring to Figure 2 As shown, the support part 222 is fixed on the rotary table 211 and is directly opposite the clamping device 3. This arrangement ensures that the support part 222 and the clamping device 3 maintain force balance when clamping the impeller and the front cover plate, thereby improving the stability of the impeller and the front cover plate during the welding process.

[0068] Furthermore, referring to Figure 2 As shown, the support part 222 is arranged in a ring shape. This arrangement increases the support coverage area of ​​the impeller. The ring shape of the support part 222 also avoids blindly increasing the support area, which would result in excessive weight of the support part and reduce the material consumption for manufacturing the support part 222.

[0069] Furthermore, referring to Figure 2 , Figure 6 As shown, the top support surface of the support part 222 is provided with a plurality of downwardly recessed grooves 223. In this embodiment, the number of grooves 223 is the same as the number of ball bearing mechanisms 221, both being six, and they are all evenly distributed circumferentially around the axis of the support part 222. This arrangement improves the stability of the ball bearing mechanism 221 when supporting the impeller. The grooves 223 are correspondingly arranged with the ball bearing mechanism 221, and the ball bearing mechanism 221 is disposed in the bottom wall of the groove 223 and can be vertically raised and lowered.

[0070] Furthermore, referring to Figure 7 As shown, Figure 7This diagram illustrates the structure of a ball bearing mechanism in an impeller welding platform according to an embodiment of the present invention. The ball bearing mechanism 221 includes a ball bearing seat 2211 and a supporting ball bearing 2210. The supporting ball bearing 2210 is movably disposed on the top of the ball bearing seat 2211 in a vertical direction. Specifically, the upper end of the ball bearing seat 2211 has a movable groove 2213 for the supporting ball bearing 2210 to slide up and down. The opening at the upper end of the movable groove 2213 is smaller than the diameter of the supporting ball bearing 2210. The ball bearing seat 2211 has a horizontally disposed air inlet 2212 that communicates with the movable groove 2213. One end of 2212 is open and connected to an external air source, which can be fixed on the rotating table 211. When the external air source simultaneously injects high-pressure gas into multiple air inlets 2212, the support ball 2210 moves upward under the action of air pressure. The opening of the movable groove 2213 restricts the rising distance of the support ball 2210. To ensure the rotation between the movable groove 2213 and the support ball 2210, grease can be applied between the support ball 2210 and the movable groove 2213, so that the highest point of the support ball 2210 is higher than the top support surface of the support part 222. Figure 7 As shown by the dashed line, the support ball 2210 moves vertically up and down under the control of the air source to achieve the first state of the ball mechanism 221 as shown. Figure 7 As shown by the solid circle, the highest point of the support ball 2210 is lower than the top support surface of the support part 222, and the second state is as follows. Figure 7 As shown by the dashed circle, the highest point of the support ball 2210 is higher than the top support surface of the support part 222.

[0071] An embodiment of the present invention provides an impeller welding platform, the positioning and alignment process of which for the impeller and the front cover plate is as follows: Initially, the distance between adjacent positioning components 20 is at its maximum, which is the initial state. The clamping device 3 is located directly above the positioning and centering device 2, and the cylinder is in the shortest stroke state.

[0072] When it is necessary to position and center the impeller and the front cover plate, align and overlap the impeller and the front cover plate, and place them on the support 222.

[0073] The external air source on the base 1 is activated, which injects high-pressure gas into the six air inlets 2212, causing the support balls 2210 to move upward and lift the impeller, moving the impeller away from the top support surface of the support part 222. Since there is grease between the support balls 2210 and the groove wall of the movable groove 2213, the support balls 2210 can still roll when they are squeezed against the groove wall at the opening of the movable groove 2213 under air pressure.

[0074] At this time, the motor on the base 1 is started, and the rotary table 211 is driven to rotate through the worm gear transmission mechanism. The free end of the swing arm 202 moves radially inward under the guidance of the guide groove 212, thereby driving the three rollers 2010 to move inward at the same time until they clamp the impeller and the outer circumference of the front cover plate, so that the two are positioned and aligned.

[0075] Then, the external air source is turned off, the support ball 2210 falls back, and the cylinder drives the pressing device 3 to descend until the lower end of the top rod 333 of the three pressing mechanisms 33 on it presses the front cover plate at the same time, thereby pressing the impeller and the front cover plate together.

[0076] During the pressing process of the pressing device 3 pressing down on the impeller and the front cover plate, the impeller and the front cover plate and the three rollers 2010 move downward together under the action of friction. At this time, the balloon 2017 deforms, the contact area between the balloon 2017 and the rollers 2010 increases, and because the balloon 2017 is deformed, it cannot rotate freely in the balloon base 2018. Therefore, the deformed balloon 2017 can limit the rollers 2010, reduce the rotation of the rollers 2010, and further increase the stability of the impeller and the front cover plate during the welding process.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An impeller welding platform, characterized in that, include: Base (1); A positioning and centering device (2) is disposed on the base (1). The positioning and centering device (2) includes a support assembly (22) for supporting the impeller and at least three positioning assemblies (20). Each positioning assembly (20) can move synchronously in the radial direction to contact the outer periphery of the impeller and the front cover plate to adjust and center them. The support assembly (22) includes a support part (222) and at least three ball bearing mechanisms (221) arranged non-collinearly along the same horizontal plane. The ball bearing mechanism (221) can be raised and lowered in the vertical direction and has a first state and a second state. In the first state, the top of the ball bearing mechanism (221) is higher than the top support surface of the support portion (222), and the top of the ball bearing mechanism (221) can roll into contact with the impeller to support the impeller, so that the impeller can move freely in the radial direction; in the second state, the top of the ball bearing mechanism (221) is lower than the top support surface of the support portion (222), and the top support surface of the support portion (222) can support the impeller. A clamping device (3) is provided on the base (1) and located on the upper side of the positioning and centering device (2). The clamping device (3) can be raised and lowered in the vertical direction to contact the upper surface of the front cover plate and cooperate with the support assembly (22) to clamp the front cover plate and the impeller.

2. The impeller welding platform according to claim 1, characterized in that, The positioning and centering device (2) further includes a linkage component (21), and each of the positioning components (20) is connected to the linkage component (21) so as to control the radial synchronous movement of each of the positioning components (20) through the movement of the linkage component (21).

3. The impeller welding platform according to claim 2, characterized in that, The linkage component (21) is a rotating platform (211) rotatably connected to the base (1), and the support component (22) is disposed on the rotating platform (211).

4. The impeller welding platform according to claim 3, characterized in that, The positioning component (20) includes a swing rod (202) and an adjusting positioning component (201). One end of the swing rod (202) is rotatably connected to the base (1), and the adjusting positioning component (201) is disposed on the free end of the swing rod (202). The rotating platform (211) is rotatably connected to the base (1). The rotating platform (211) has a guide groove (212) that is inclined to its circumference and corresponds to the positioning component (20). The free end of the swing rod (202) is slidably connected to the guide groove (212) so that the free end of the swing rod (202) can be moved radially by the rotation of the rotating platform (211).

5. The impeller welding platform according to claim 4, characterized in that, The adjusting positioning element (201) is a roller (2010) rotatably disposed at the free end of the rocker arm (202).

6. The impeller welding platform according to claim 4, characterized in that, The adjusting positioning component (201) includes a roller (2010), a pin (2015), and a sliding sleeve (2016). The pin (2015) is vertically fixed on the free end of the rocker arm (202). The sliding sleeve (2016) is sleeved on the pin (2015) and can slide vertically along the pin (2015). The roller (2010) is disposed on the sliding sleeve (2016). A limiting component for restricting the sliding sleeve (2016) from sliding upward is provided at the upper end of the pin (2015). An elastic element is provided on the rocker arm (202) that abuts against the lower surface of the roller (2010). The compressible stroke of the elastic element in the vertical direction is greater than the lifting stroke between the first state and the second state of the ball bearing mechanism (221).

7. The impeller welding platform according to claim 1, characterized in that, The support (222) is positioned opposite the clamping device (3).

8. The impeller welding platform according to claim 1, characterized in that, The support portion (222) is arranged in a ring shape.

9. The impeller welding platform according to claim 1, characterized in that, The top support surface of the support part (222) is provided with a plurality of downward recessed grooves (223). The grooves (223) are correspondingly provided with the ball bearing mechanism (221). The ball bearing mechanism (221) is provided in the bottom wall of the groove (223) and can be vertically raised and lowered.

10. The impeller welding platform according to claim 9, characterized in that, The ball mechanism (221) includes a ball seat (2211) and a support ball (2210). The support ball (2210) is movably disposed on the top of the ball seat (2211) in the vertical direction. The support ball (2210) can be vertically raised and lowered under the control of an air source to realize the first state and the second state of the ball mechanism (221).

Images