Double-suction welding structure impeller and positioning tool thereof

Abstract

The utility model provides a double-suction welding structure impeller and a positioning tool thereof, and belongs to the technical field of double-suction welding structure impellers. The double-suction welding structure impeller comprises two cover discs, two blade sets and a shaft disc; by means of the design that the blades are perpendicular to the first flow guide face and extend in the radial direction of the cover disc, the center lines of the blades can coincide with the radius of the cover disc, and therefore scribing positioning can be conveniently conducted on the blades before the blades are welded, the welding positions of the blades can be conveniently designed, the welding precision is improved, the blades can be evenly distributed on the cover disc, and the welding quality is improved. Therefore, the welding quality and the welding efficiency of the blade and the cover disc can be improved; when the shaft disc and the blade set are welded, it is guaranteed that the shaft disc and the cover disc are coaxial, the blades are perpendicular to the second flow guide face of the shaft disc, the blades are parallel to the air inlet direction and the air exhaust direction of the impeller, airflow can directly penetrate through the blades, turbulence and vortex of the airflow between the blades are reduced, and airflow distribution is more uniform.

Description

Technical Field

[0001] The present application belongs to the technical field of double-suction welded structure impellers, and specifically relates to a double-suction welded structure impeller and a positioning tooling thereof. Background Art

[0002] The double-suction impeller is equivalent to two single-suction impellers of the same diameter working at the same time. It can increase the flow rate and improve the efficiency under the same impeller outer diameter. In addition, it can reduce the length of the rotor, and the manufacturing cost and production cycle are much lower than using two single-suction impellers, so it has been widely used. However, the traditional double-suction impeller is made of two impellers welded back to back, which is prone to deformation during the welding process, and may even cause the welding to fail, thus making the impeller scrapped.

[0003] The structure of the double-suction impeller is more complicated than that of the single-suction impeller, and there are more difficulties in the assembly and welding processes. In order to reduce the welding deformation of the double-suction impeller, some researchers have proposed a welding sequence of welding the cover disc first and then the shaft disc. However, when the impeller is processed using the new welding sequence, the original double-suction impeller structure is inconvenient to position during the welding process and has poor compatibility with the new welding method. For this reason, this application proposes a new double-suction welded structure impeller. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] To this end, a first aspect of the utility model provides a double-suction welded structure impeller.

[0006] A second aspect of the utility model provides a positioning tool for an impeller with a double-suction welding structure.

[0007] In view of this, according to a first aspect of an embodiment of the present application, a double-suction welded structure impeller is proposed, comprising:

[0008] Two cover plates, the cover plates comprising a first flow guide surface;

[0009] Two blade groups, a first side of the blade group is welded to the cover plate, and the blade group and the cover plate correspond one to one;

[0010] The blade group includes a plurality of blades, the blades are evenly arranged on the cover plate along the circumference of the cover plate, the blades are arranged perpendicular to the first guide surface, and the blades extend along the radial direction of the cover plate;

[0011] The shaft disc comprises a second flow guide surface, the shaft disc is coaxially arranged with the cover disc, and the shaft disc is welded to the second side of the blade assembly so that the blades are perpendicular to the second flow guide surface;

[0012] The first blade group is located on the first side of the shaft disc, and the second blade group is located on the second side of the shaft disc; the first side of the blade is welded to the cover disc, and the second side of the blade is welded to the shaft disc.

[0013] In a feasible embodiment, the cover plate further includes:

[0014] A positioning surface, the positioning surface is connected to the first side of the first guide surface, the positioning surface is a curved surface extending along the axial direction of the cover plate, and the positioning surface is used to limit the positioning tooling;

[0015] A supporting surface, the supporting surface is connected to the second side of the first guide surface, the supporting surface is a plane perpendicular to the axis of the cover plate, and the supporting surface is used to support the positioning tooling.

[0016] In a feasible implementation manner, a positioning groove is provided at the outlet end of the first side of the blade, and the positioning groove is used for clamping the positioning tool.

[0017] In a feasible implementation manner, the double-suction welded structure impeller further includes:

[0018] A first welding groove, the first welding groove is arranged at an inlet end of a first side of the blade;

[0019] A second welding groove is arranged at an outlet end of the first side of the blade.

[0020] In a feasible implementation manner, the double-suction welded structure impeller further includes:

[0021] A third welding groove, the third welding groove is arranged at the inlet end of the second side of the blade;

[0022] A fourth welding groove is arranged at an outlet end of the second side of the blade.

[0023] In a feasible implementation manner, the double-suction welded structure impeller further includes:

[0024] A blade convex stop, the blade convex stop being arranged at the outlet end of the second side of the blade;

[0025] The shaft disc has concave stoppers, and two concave stoppers of the shaft disc are symmetrically arranged at the outlet end of the shaft disc, and the concave stoppers of the shaft disc are matched with the convex stoppers of the blades.

[0026] According to a second aspect of an embodiment of the present application, a positioning tool for a double-suction welded structure impeller is provided, which is used to assist in welding a double-suction welded structure impeller such as any of the above technical solutions, and the positioning tool comprises:

[0027] A positioning sleeve, the positioning sleeve is rotatably connected to the base;

[0028] The positioning plate is arranged perpendicular to the axis of the cover plate, the positioning plate is welded to the positioning sleeve, the positioning plate fits the cover plate, and the positioning plate is used to position the blade;

[0029] The positioning template is arranged perpendicular to the first guide surface of the cover plate, the positioning template is connected with the blade by clipping, the positioning template is fitted with the cover plate, and the positioning template is used to position the blade.

[0030] In a feasible implementation manner, the positioning tooling of the double-suction welded structure impeller further includes:

[0031] The positioning column is vertically arranged on the positioning plate, and the positioning column is detachably arranged on the positioning plate. The positioning column is used to position the blade.

[0032] In a feasible implementation manner, the positioning tooling of the double-suction welded structure impeller further includes:

[0033] The clamping part is arranged on the positioning template, and the shape of the clamping part is matched with the shape of the positioning groove of the blade so that the positioning template and the blade can be clamped and connected.

[0034] In a feasible embodiment, the positioning template is rectangular, and a first contact surface is provided on the positioning template. The first contact surface is parallel to the supporting surface of the cover plate, and the positioning template is fitted with the supporting surface of the cover plate through the first contact surface; a second contact surface is provided on the positioning plate, and the second contact surface is an arc surface, and the positioning plate is fitted with the positioning surface of the cover plate through the second contact surface.

[0035] Compared with the prior art, the double-suction welded impeller and its positioning tooling of the present application have the following beneficial effects:

[0036] The double-suction welded structure impeller provided in the embodiment of the present application includes two cover plates, two blade groups and a shaft plate; since each blade of the blade group needs to be welded to the cover plate first, and then the two blade groups are welded to the two sides of the shaft plate to assemble into a complete impeller structure; therefore, before the blade and the cover plate are welded, each blade needs to be positioned. The present application designs that the blade is perpendicular to the first guide surface and the blade extends radially along the cover plate, so that the center line of the blade can coincide with the radius of the cover plate, thereby facilitating the marking and positioning of the blade before welding, facilitating the design of the welding position of the blade, improving the welding accuracy, and further enabling the blades to be evenly distributed on the cover plate, thereby helping to improve the welding quality and welding efficiency of the blade and the cover plate; when the shaft plate and the blade group are welded, ensuring that the shaft plate and the cover plate are coaxial, the blades can be perpendicular to the second guide surface of the shaft plate, and the blades are parallel to the intake direction and exhaust direction of the impeller, so that the airflow can directly pass through the blades, reducing the turbulence and eddy current of the airflow between the blades, making the airflow distribution more uniform, and helping to improve the stability of the airflow flow.

[0037] The positioning tooling of the double-suction welding structure impeller provided in the embodiment of the present application includes a positioning sleeve, a positioning plate and a positioning template; the positioning plate is arranged perpendicular to the axis of the cover disk, the positioning plate is welded to the positioning sleeve, and the positioning sleeve is rotatably connected to the base, so that the positioning sleeve can drive the positioning plate to rotate relative to the base to different positions in the circumference of the cover disk; the mutual limitation between the positioning plate and the cover disk is realized through the contact between the positioning plate and the cover disk, so as to improve the reliability of the positioning of the inlet end of the blade by the positioning plate, thereby improving the positioning accuracy of the inlet end of the blade; the positioning template is placed on the outlet end of the cover disk and clamped with the blade, and the positioning template is arranged perpendicular to the first guide surface of the cover disk, so that the blade is positioned by the positioning template so that the outlet end of the blade is perpendicular to the first guide surface, and then the inlet end and the outlet end of the blade are both fixed, thereby improving the accuracy of the positioning of the blade before welding, which is beneficial to improving the welding accuracy, so that the blade can be evenly fixed on the cover disk according to the designed position. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0039] Figure 1 A schematic structural diagram of a double-suction welded structure impeller according to an embodiment of the present application;

[0040] Figure 2 A schematic structural diagram of the welding of an impeller assembly and a cover plate of a double-suction welded structure impeller according to an embodiment of the present application;

[0041] Figure 3 A schematic structural diagram of a positioning groove of a double-suction welded structure impeller according to an embodiment of the present application;

[0042] Figure 4 A schematic structural diagram of a welding groove of a double-suction welded structure impeller according to an embodiment of the present application;

[0043] Figure 5 A schematic structural diagram of the welding of the shaft disc and the first blade group of a double-suction welded structure impeller according to an embodiment of the present application;

[0044] Figure 6 A schematic structural diagram of a positioning tool for positioning blades of a double-suction welded structure impeller according to an embodiment of the present application;

[0045] Figure 7 A schematic structural diagram of a positioning plate of a positioning tool for a double-suction welded structure impeller according to an embodiment of the present application;

[0046] Figure 8 A schematic structural diagram of a positioning template of a positioning tool for a double-suction welded structure impeller according to an embodiment of the present application;

[0047] in, Figures 1 to 8 The corresponding relationship between the reference numerals and component names in the figure is:

[0048] 10. Cover plate; 11. Blade assembly; 12. Shaft plate; 13. Inlet end; 14. Outlet end; 15. Positioning groove; 16. First welding groove; 17. Second welding groove; 18. Third welding groove; 19. Fourth welding groove; 20. Blade convex stop; 21. Shaft plate concave stop; 22. First groove; 23. Second groove;

[0049] 11a first blade group; 11b second blade group; 111, blade;

[0050] 101. first flow guide surface; 102. positioning surface; 103. supporting surface;

[0051] 121. Second guide surface;

[0052] 30. Positioning sleeve; 31. Positioning plate; 32. Positioning template; 33. Positioning column; 34. Clamping portion; 35. First contact surface; 36. Second contact surface; 37. Base; 38. Column. DETAILED DESCRIPTION

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0057] like Figure 1 and Figure 2 As shown, according to the first aspect of the embodiment of the present application, a double-suction welded structure impeller is proposed, comprising: two cover plates 10, two blade groups 11 and a shaft plate 12; the cover plate 10 comprises a first guide surface 101; a first side of the blade group 11 is welded to the cover plate 10, and the blade group 11 corresponds to the cover plate 10 one by one; the blade group 11 comprises a plurality of blades 111, and the blades 111 are evenly arranged on the cover plate 10 along the circumference of the cover plate 10, and the blades 111 are arranged perpendicular to the first guide surface 101. The shaft disc 12 is disposed in a radial direction of the cover disc 10, and the blades 111 extend in a radial direction of the cover disc 10; the shaft disc 12 includes a second guide surface 121, the shaft disc 12 is coaxially disposed with the cover disc 10, and the shaft disc 12 is welded to a second side of the blade group 11, so that the blades 111 are perpendicular to the second guide surface 121; wherein the first blade group 11 is located on a first side of the shaft disc 12, and the second blade group 11 is located on a second side of the shaft disc 12; the first side of the blade 111 is welded to the cover disc 10, and the second side of the blade 111 is welded to the shaft disc 12.

[0058] The double-suction welded structure impeller provided in the embodiment of the present application includes two cover plates 10, two blade groups 11 and a shaft plate 12; since each blade 111 of the blade group 11 needs to be welded to the cover plate 10 first, and then the two blade groups 11 are welded to the two sides of the shaft plate 12 to assemble into a complete impeller structure; therefore, before the blade 111 is welded to the cover plate 10, each blade 111 needs to be positioned. In the present application, the blade 111 is perpendicular to the first guide surface 101 and the blade 111 extends radially along the cover plate 10, so that the center line of the blade 111 can coincide with the radius of the cover plate 10, thereby facilitating the positioning of the blade 111 before the blade 111 is welded. 1 is marked for positioning, which is convenient for designing the welding position of the blade 111 and improving the welding accuracy, so that the blade 111 can be evenly distributed on the cover plate 10, which is helpful to improve the welding quality and welding efficiency of the blade 111 and the cover plate 10; when the shaft disk 12 and the blade group 11 are welded, the shaft disk 12 is ensured to be coaxial with the cover plate 10, that is, the blade 111 is also perpendicular to the second guide surface 121 of the shaft disk 12, and the blade 111 is parallel to the intake direction and exhaust direction of the impeller, so that the airflow can directly pass through the blade 111, reducing the turbulence and vortex of the airflow between the blades 111, making the airflow distribution more uniform, which is conducive to improving the stability of the airflow.

[0059] It is understandable that before welding the blade 111 to the cover plate 10, it is necessary to draw a center line on the blade 111 and draw an intersection line between the blade 111 and the cover plate 10 on the cover plate 10, so as to position the blade 111 according to the marked position, so that the blade 111 can be accurately welded to the cover plate 10 according to the marked position after being positioned.

[0060] like Figure 2 As shown, in a feasible embodiment, the cover plate 10 also includes: a positioning surface 102 and a supporting surface 103; the positioning surface 102 is connected to the first side of the first guide surface 101, the positioning surface 102 is a curved surface extending along the axial direction of the cover plate 10, and the positioning surface 102 is used to limit the positioning tooling; the supporting surface 103 is connected to the second side of the first guide surface 101, the supporting surface 103 is a plane perpendicular to the axis of the cover plate 10, and the supporting surface 103 is used to support the positioning tooling.

[0061] In this technical solution, the positioning surface 102 and the supporting surface 103 are respectively located on both sides of the first guide surface 101, and the blade 111 is welded to the first guide surface 101. The positioning surface 102 and the supporting surface 103 are designed, and the positioning surface 102 is brought into contact with the positioning tooling to fix the position of the blade 111 at the inlet end 13 of the cover plate 10 through the positioning tooling, and then the support surface 103 is brought into contact with the positioning tooling to fix the position of the blade 111 at the outlet end 14 of the cover plate 10, and then the position of the blade 111 on the first guide surface 101 is fixed by the positioning tooling, and then subsequent welding work is performed to ensure the accuracy of the welding position of the blade 111 on the cover plate 10, so that the blade 111 can be evenly distributed on the cover plate 10.

[0062] like Figure 3 As shown, in a feasible implementation manner, the outlet end 14 of the first side of the blade 111 is provided with a positioning groove 15, and the positioning groove 15 is used for clamping a positioning tool.

[0063] In this technical solution, a positioning groove 15 is provided at the outlet end 14 of the first side of the blade 111. When the blade 111 contacts the first guide surface 101, the blade 111 and the support surface 103 are arranged to form a positioning cavity. The positioning tool is engaged with the positioning cavity to fix the position of the positioning tool at the outlet end 14 of the cover plate 10, thereby improving the stability of the positioning tool and thus improving the reliability of the positioning work on the blade 111, which helps to improve the welding accuracy of the blade 111.

[0064] like Figure 3 and Figure 4 As shown, in a feasible embodiment, the double-suction welded structure impeller also includes: a first welding groove 16 and a second welding groove 17; the first welding groove 16 is arranged at the inlet end 13 of the first side of the blade 111; the second welding groove 17 is arranged at the outlet end 14 of the first side of the blade 111.

[0065] In this technical solution, a first welding groove 16 is provided at the inlet end 13 on the side where the blade 111 is connected to the cover plate 10, and a second welding groove 17 is provided at the outlet end 14 on the side where the blade 111 is connected to the cover plate 10, so as to reduce the welding amount when welding the blade 111 to the cover plate 10, thereby improving the welding quality and welding efficiency of the blade 111 and the cover plate 10. At the same time, the design of the first welding groove 16 and the second welding groove 17 reduces the welding deformation between the blade 111 and the cover plate 10, and improves the welding accuracy and structural stability of the blade 111 and the cover plate 10.

[0066] Furthermore, when processing the first welding groove 16 and the second welding groove 17, the first groove 22 is processed at the middle position of the blade 111 while maintaining the original design size of the blade 111. The inlet end 13 and the outlet end 14 of the blade 111 are first processed into spline lines with a gap of 3 mm, and then the grooves are processed. This can not only play the role of assembling the blade 111 and the cover plate 10, but also reduce the welding amount and welding deformation.

[0067] Specifically, the angle of the groove is 50 to 60 degrees.

[0068] like Figure 4 As shown, in a feasible embodiment, the double-suction welded structure impeller also includes: a third welding groove 18 and a fourth welding groove 19; the third welding groove 18 is arranged at the inlet end 13 of the second side of the blade 111; the fourth welding groove 19 is arranged at the outlet end 14 of the second side of the blade 111.

[0069] In this technical solution, a third welding groove 18 is provided at the inlet end 13 on the side where the blade 111 is connected to the shaft disc 12, and a fourth welding groove 19 is provided at the outlet end 14 on the side where the blade 111 is connected to the shaft disc 12, so as to reduce the welding amount when welding the blade 111 to the shaft disc 12, thereby improving the welding quality and welding efficiency of the blade 111 and the shaft disc 12. At the same time, the design of the third welding groove 18 and the fourth welding groove 19 reduces the welding deformation between the blade 111 and the shaft disc 12, and improves the welding accuracy and structural stability of the blade 111 and the shaft disc 12.

[0070] Furthermore, when processing the third welding groove 18 and the fourth welding groove 19, the second groove 23 is processed in the middle position of the blade 111 while maintaining the original design size of the blade 111. The inlet end 13 and the outlet end 14 of the blade 111 are first processed into spline lines with a gap of 3 mm, and then the grooves are processed. This can not only play the role of assembling the blade 111 and the cover plate 10, but also reduce the welding amount and welding deformation.

[0071] Specifically, the angle of the groove is 50 to 60 degrees.

[0072] In some examples, the flow channel side of the inner wall of the shaft disc 12 is kept in its original state, and a margin is left on the side of the shaft disc 12 away from the flow channel, and the margin is generally kept at 5 to 10 mm to maintain the rigidity of the welding.

[0073] like Figure 5 As shown, in a feasible embodiment, the double-suction welded structure impeller also includes: a blade convex stop 20 and a shaft disk concave stop 21; the blade convex stop 20 is arranged at the outlet end 14 of the second side of the blade 111; the two shaft disk concave stops 21 are symmetrically arranged at the outlet end 14 of the shaft disk 12, and the shaft disk concave stop 21 is adapted to the blade convex stop 20.

[0074] In this technical solution, shaft disc concave stops 21 are respectively provided on both sides of the outlet end 14 of the shaft disc 12, and the two shaft disc concave stops 21 are adapted to the blade convex stops 20 of the blades 111 on both sides. By docking the shaft disc concave stop 21 with the shaft disc 12 convex stop, the position accuracy of the blade 111 and the shaft disc 12 during welding can be improved, thereby reducing the adjustment and correction work during the welding process and improving the welding efficiency. Moreover, the close fit between the blade convex stop 20 and the shaft disc concave stop 21 can effectively prevent displacement or deviation during the welding process, improve the welding accuracy between the blade 111 and the shaft disc 12, and improve the welding quality. At the same time, the blade convex stop 20 is first docked with the shaft disc concave stop 21, which helps to improve the stability of the blade 111 and the shaft disc 12 after welding, so that the structure can withstand greater shear force, thereby ensuring the stability and reliability of the welded structure.

[0075] As a preferred solution, after the shaft disc 12 and the first impeller assembly are welded, the side where the shaft disc 12 and the second impeller assembly are welded is turned to produce a stop for welding alignment, and the flow channel side is also processed to facilitate positioning of the shaft disc 12 when the shaft disc 12 and the first impeller assembly are welded, thereby improving the welding accuracy between the first impeller assembly and the shaft disc 12.

[0076] like Figure 6 and Figure 7 As shown, according to the second aspect of the present application, a positioning tool for a double-suction welded structure impeller is proposed, which is used to assist in the welding of a double-suction welded structure impeller such as any of the above-mentioned technical solutions, and the positioning tool includes: a positioning sleeve 30, a positioning plate 31 and a positioning template 32; the positioning sleeve 30 is rotatably connected to the base 37; the positioning plate 31 is arranged perpendicular to the axis of the cover plate 10, the positioning plate 31 is welded to the positioning sleeve 30, the positioning plate 31 is fitted with the cover plate 10, and the positioning plate 31 is used to position the blade 111; the positioning template 32 is arranged perpendicular to the first guide surface 101 of the cover plate 10, the positioning template 32 is clamped and connected to the blade 111, the positioning template 32 is fitted with the cover plate 10, and the positioning template 32 is used to position the blade 111.

[0077] The positioning tooling of the double-suction welded structure impeller provided in the embodiment of the present application includes a positioning sleeve 30, a positioning plate 31 and a positioning template 32; the positioning plate 31 is arranged perpendicular to the axis of the cover plate 10, the positioning plate 31 is welded and connected to the positioning sleeve 30, and the positioning sleeve 30 is rotatably connected to the base 37, so that the positioning sleeve 30 can drive the positioning plate 31 to rotate relative to the base 37 to different positions on the circumference of the cover plate 10; the positioning plate 31 is contacted with the cover plate 10 to achieve mutual limitation between the positioning plate 31 and the cover plate 10, so as to improve the reliability of the positioning plate 31 in positioning the inlet end 13 of the blade 111, thereby Improve the positioning accuracy of the inlet end 13 of the blade 111; the positioning template 32 is placed on the outlet end 14 of the cover plate 10 and is clamped with the blade 111, and the positioning template 32 is arranged perpendicular to the first guide surface 101 of the cover plate 10, so that the blade 111 is positioned by the positioning template 32 so that the outlet end 14 of the blade 111 is perpendicular to the first guide surface 101, and then the inlet end 13 and the outlet end 14 of the blade 111 are fixed, thereby improving the positioning accuracy of the blade 111 before welding, which is beneficial to improving the welding accuracy, so that the blade 111 can be evenly fixed on the cover plate 10 according to the designed position.

[0078] Furthermore, a column 38 is provided on the base 37, and the positioning sleeve 30 is mounted on the column 38. There is a gap contact between the positioning sleeve 30 and the column 38, so that the positioning sleeve 30 can flexibly rotate relative to the positioning column 33, thereby driving the positioning plate 31 to rotate quickly to the marking position of the blade 111.

[0079] In some examples, when positioning the blade 111, the blade 111 is first placed above the cover plate 10, and then the positioning tool is placed between the blade 111 and the cover plate 10; after the blade 111 and the cover plate 10 are positioned using the positioning tool, the accurately positioned blade 111 is first spot welded and fixed to the cover plate 10, and then the positioning plate 31 and the positioning sleeve 30 are rotated around the column 38 to the position line of the next blade 111 on the cover plate 10, and the positioning and spot welding fixing work of all the blades 111 is completed in sequence, and then the blade 111 is welded and fixed to the cover plate 10, and then stress relief treatment is performed.

[0080] Furthermore, a positioning surface 102 and a supporting surface 103 are designed on the cover plate 10. The positioning surface 102 is located at the inlet end 13 of the cover plate 10, and the positioning plate 31 is in contact with the positioning surface 102; the supporting surface 103 is located at the outlet end 14 of the cover plate 10, and the positioning template 32 is in contact with the supporting surface 103, so as to respectively position the inlet end 13 and the outlet end 14 of the blade 111, so that the blade 111 is perpendicular to the first guide surface 101.

[0081] like Figure 6As shown, in a feasible embodiment, the positioning tooling of the double-suction welded structure impeller also includes: a positioning column 33; the positioning column 33 is vertically arranged on the positioning plate 31, the positioning column 33 is detachably arranged on the positioning plate 31, and the positioning column 33 is used to position the blade 111.

[0082] In this technical solution, the positioning column 33 is vertically arranged on the positioning plate 31, so as to position the inlet end 13 of the blade 111 through the positioning column 33, so that the inlet end 13 of the blade 111 is perpendicular to the positioning plate 31, thereby improving the verticality between the blade 111 and the first guide surface 101 after positioning, improving the welding efficiency, and thus ensuring the verticality of the blade 111 after welding with the cover plate 10, so as to ensure the subsequent welding accuracy of the blade 111.

[0083] Specifically, the positioning column 33 is a bolt to achieve quick disassembly and assembly of the positioning column 33 and the positioning plate 31 .

[0084] like Figure 8 As shown, in a feasible embodiment, the positioning tooling of the double-suction welded structure impeller also includes: a clamping portion 34; the clamping portion 34 is arranged on the positioning template 32, and the shape of the clamping portion 34 is adapted to the shape of the positioning groove 15 of the blade 111, so that the positioning template 32 and the blade 111 can be clamped and connected.

[0085] In this technical solution, the clamping portion 34 is arranged on the positioning template 32, and the shape of the clamping portion 34 is adapted to the shape of the positioning groove 15 of the blade 111, so that the clamping portion 34 can be stably fixed on the supporting surface 103 of the blade 111 and the cover plate 10, that is, the stability of the clamping portion 34 is improved, thereby improving the stability and reliability of the clamping portion 34 in positioning the outlet end 14 of the blade 111.

[0086] like Figure 7 and Figure 8 As shown, in a feasible embodiment, the positioning template 32 is rectangular, and a first contact surface 35 is provided on the positioning template 32, the first contact surface 35 is parallel to the support surface 103 of the cover plate 10, and the positioning template 32 is fitted with the support surface 103 of the cover plate 10 through the first contact surface 35; a second contact surface 36 is provided on the positioning plate 31, and the second contact surface 36 is an arc surface, and the positioning plate 31 is fitted with the positioning surface 102 of the cover plate 10 through the second contact surface 36.

[0087] In this technical solution, the positioning template 32 is rectangular, that is, the two opposite side surfaces of the positioning template 32 are parallel to each other. The first contact surface 35 in contact with the cover plate 10 is parallel to the support surface 103, so that the positioning template 32 is perpendicular to the support surface 103, and then the outlet end 14 of the blade 111 is also perpendicular to the support surface 103; the arc-shaped second contact surface 36 on the positioning plate 31 is in contact with the positioning surface 102, so that the cover plate 10 is positioned through the positioning plate 31, and then the inlet end 13 of the blade 111 is positioned through the positioning column 33, so that the inlet end 13 of the blade 111 is perpendicular to the positioning surface 102, and then the blade 111 is perpendicular to the first guide surface 101 as a whole, and the mutual positioning between the cover plate 10 and the tooling is improved. The reliability and stability of the positioning position of the blade 111 are improved.

[0088] The positioning tool for the double-suction welded structure impeller provided in the embodiment of the present application is used to assist in the welding of a double-suction welded structure impeller such as any of the above-mentioned technical solutions. Therefore, the positioning tool for the double-suction welded structure impeller has all the beneficial effects brought by the double-suction welded structure impeller of the above-mentioned technical solutions when assisting in the welding of the double-suction welded structure impeller, which will not be elaborated here.

[0089] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0090] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A double-suction welded impeller, characterized in that: The double-suction welded structure impeller comprises: Two cover plates, each of which includes a first flow guide surface; Two blade groups, a first side of each blade group is welded to the cover plate, and each blade group corresponds to the cover plate one by one; The blade group includes a plurality of blades, the blades are evenly arranged on the cover disk along the circumference of the cover disk, the blades are arranged perpendicular to the first guide surface, and the blades extend along the radial direction of the cover disk; A shaft disc, the shaft disc comprising a second flow guide surface, the shaft disc and the cover disc are coaxially arranged, and the shaft disc is welded to the second side of the blade group so that the blades are perpendicular to the second flow guide surface; The first blade group is located on the first side of the shaft disc, and the second blade group is located on the second side of the shaft disc; the first side of the blade is welded to the cover disc, and the second side of the blade is welded to the shaft disc.

2. The double-suction welded structure impeller according to claim 1, characterized in that: The cover plate also includes: A positioning surface, the positioning surface is connected to the first side of the first guide surface, the positioning surface is a curved surface extending along the axial direction of the cover plate, and the positioning surface is used to limit the positioning tooling; A supporting surface, wherein the supporting surface is connected to the second side of the first guide surface, the supporting surface is a plane perpendicular to the axis of the cover plate, and the supporting surface is used to support the positioning tool.

3. The double-suction welded structure impeller according to claim 2, characterized in that: The outlet end of the first side of the blade is provided with a positioning groove, and the positioning groove is used for clamping the positioning tool.

4. The double-suction welded structure impeller according to claim 1, characterized in that: The double-suction welded structure impeller also includes: a first welding groove, the first welding groove being arranged at an inlet end of a first side of the blade; A second welding groove is provided at an outlet end of the first side of the blade.

5. The double-suction welded structure impeller according to claim 4, characterized in that: The double-suction welded structure impeller also includes: a third welding groove, the third welding groove being arranged at an inlet end of the second side of the blade; A fourth welding groove is arranged at an outlet end of the second side of the blade.

6. The double-suction welded structure impeller according to claim 5, characterized in that: The double-suction welded structure impeller also includes: A blade convex stop, wherein the blade convex stop is arranged at an outlet end of a second side of the blade; The shaft disc has a concave stop, and two of the shaft disc concave stops are symmetrically arranged at the outlet end of the shaft disc, and the shaft disc concave stop is adapted to the blade convex stop.

7. A positioning tool for a double-suction welded impeller, characterized in that: Used for assisting welding of a double-suction welding structure impeller according to any one of claims 1 to 6, the positioning tool comprises: A positioning sleeve, the positioning sleeve is rotatably connected to the base; A positioning plate, the positioning plate is arranged perpendicular to the axis of the cover plate, the positioning plate is welded to the positioning sleeve, the positioning plate is fitted to the cover plate, and the positioning plate is used to position the blade; A positioning template, wherein the positioning template is arranged perpendicular to the first guide surface of the cover plate, the positioning template is connected to the blade by clipping, the positioning template is fitted with the cover plate, and the positioning template is used to position the blade.

8. The positioning tool for a double-suction welded structure impeller according to claim 7, characterized in that: The positioning tooling of the double-suction welded structure impeller also includes: A positioning column, wherein the positioning column is vertically arranged on the positioning plate, the positioning column is detachably arranged on the positioning plate, and the positioning column is used to position the blade.

9. The positioning tool for a double-suction welded structure impeller according to claim 7, characterized in that: The positioning tooling of the double-suction welded structure impeller also includes: A clamping portion is arranged on the positioning template, and the shape of the clamping portion is adapted to the shape of the positioning groove of the blade so that the positioning template and the blade can be clamped and connected.

10. The positioning tool for a double-suction welded impeller according to claim 9, characterized in that: The positioning template is rectangular, and a first contact surface is provided on the positioning template, the first contact surface is parallel to the support surface of the cover plate, and the positioning template is fitted with the support surface of the cover plate through the first contact surface; The positioning plate is provided with a second contact surface, the second contact surface is an arc surface, and the positioning plate is fitted with the positioning surface of the cover plate through the second contact surface.

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