Narrow flow channel impeller

Abstract

The utility model provides a narrow flow channel impeller, belongs to the technical field of impellers, and aims to solve the problem that blades of impellers with different thicknesses are difficult to weld. The narrow flow channel impeller comprises a cover disc and a shaft disc. The cover disc comprises a plurality of blades. Each blade comprises a main body part and a connecting part. The main body part is arranged on the cover disc. The connecting part is arranged at one end of the main body part away from the cover disc; the shaft disc is located on the side, provided with the blades, of the cover disc. A plurality of welding grooves are formed in the side, away from the cover disc, of the shaft disc. And the welding grooves correspond to the blades in position. And the connecting part of each blade is connected to the groove bottom of one welding groove. The width of the connecting part is matched with the width of the bottom of the welding groove. When the narrow flow channel impeller is welded, uniform welding specifications can be adopted, welding seams are formed at a time, the problems that the blades are broken down and damaged, the blades and the bottoms of the welding grooves can not be fused, and welding meat can not sink out are solved, welding difficulty is lowered, and welding strength and product quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of impellers, and in particular relates to a narrow-channel impeller. Background Art

[0002] Traditional narrow channel impellers mostly have blades of equal thickness, but with the continuous development of new impeller models, a large number of narrow channel impellers with unequal thickness have emerged. If such impellers are welded using the traditional narrow channel impeller welding method, that is, the groove bottom width and the blade thickness are both unequal thicknesses, resulting in the inability to unify the welding specifications. Many problems will arise in the welding manufacturing process, such as thin blades are prone to breakdown, and thick blades are prone to being unable to fuse and sink weld meat due to low current, which in turn leads to insufficient bonding strength, seriously affecting the production quality of the impeller. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to provide a narrow flow channel impeller, which can make the weld formed in one time during the welding process, with good weld meat, no burn-through, no unfusion, and all blade welds pass the flaw detection, thereby improving product quality and reducing welding difficulty.

[0004] In order to solve the above problems, the utility model provides a narrow channel impeller, including: a cover plate and a shaft plate. The cover plate includes a plurality of blades. The blades include a main body and a connecting portion. The main body is arranged on the cover plate. The connecting portion is arranged at an end of the main body away from the cover plate. The shaft plate is located on a side of the cover plate where the blades are arranged. A plurality of welding grooves are arranged on a side of the shaft plate away from the cover plate. The positions of the welding grooves correspond to the blades. The connecting portion of each blade is connected to the bottom of a welding groove. The width of the connecting portion is adapted to the width of the bottom of the welding groove.

[0005] Optionally, the cross section of the blade is T-shaped, including a vertical portion and a transverse portion connected to each other, wherein the vertical portion is the main body portion and the transverse portion is the connecting portion.

[0006] Optionally, the width of the connecting portion is equal to the maximum width of the main body portion.

[0007] Optionally, from the bottom of the welding groove to the opening side of the welding groove, the welding groove includes a first groove section and a second groove section. The width of the second groove section is greater than the width of the first groove section. The groove bottom width of the first groove section is adapted to the width of the connecting portion.

[0008] Optionally, from the bottom of the first slot section to the second slot section, the side wall of the first slot section includes a first inclined surface and a first vertical surface connected to each other. The angle between the first inclined surfaces on both sides of the first slot section is α, and α is 45° to 50°.

[0009] Optionally, from the first slot section to the second slot section, the side wall of the second slot section includes a second inclined surface and a second vertical surface connected to each other. The angle between the second inclined surfaces on both sides of the second slot section is β, and β is 85° to 90°.

[0010] Optionally, the width of the connecting portion is D. The width of the bottom of the welding groove is D+d. d is 0.3-0.7 mm.

[0011] Optionally, the narrow channel impeller further comprises: a recessed stop and a raised stop. The recessed stop is arranged on the outer peripheral surface of the cover disc along the circumference of the cover disc, and the recessed stop is located on the side of the cover disc where the blades are arranged. The raised stop is arranged on the side of the shaft disc away from the welding groove along the circumference of the shaft disc, and the raised stop is inserted into the recessed stop.

[0012] Optionally, the recessed stopper and the raised stopper are connected by welding.

[0013] Optionally, the soldering groove is filled with solder.

[0014] Beneficial Effects

[0015] The narrow channel impeller provided by the utility model comprises a cover plate and a shaft plate. The cover plate comprises a plurality of blades. The blade comprises a main body and a connecting portion. The connecting portion is used to connect with the bottom of the welding groove on the shaft plate, and the width of the connecting portion is adapted to the width of the bottom of the welding groove. During welding, a unified welding specification can be adopted, the weld is formed in one step, and the problems of blade breakdown defect, the inability of the blade to fuse with the bottom of the welding groove, and the inability to sink the weld meat are avoided, thereby reducing the welding difficulty and improving the welding strength and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structural decomposition of a narrow channel impeller according to an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the main body of a blade according to an embodiment of the present utility model;

[0018] Figure 3 A schematic diagram of the structure of a cover plate according to an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the structure of a shaft disc according to an embodiment of the utility model;

[0020] Figure 5 The present invention is a schematic diagram of the combined state of a cover disc and a shaft disc according to an embodiment of the present invention.

[0021] The reference numerals are:

[0022] 1. Cover plate; 2. Blades; 3. Shaft plate; 4. Welding groove;

[0023] 11. Recessed stop;

[0024] 21. Main body; 22. Connecting part;

[0025] 31. Raised stop;

[0026] 41. first slot section; 42. second slot section;

[0027] 411. first inclined surface; 412. first vertical surface;

[0028] 421. Second inclined surface; 422. Second vertical surface. DETAILED DESCRIPTION

[0029] In the description of the present invention, 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 invention 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 invention.

[0030] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 the present invention can be understood according to specific circumstances.

[0032] The preferred embodiments of the present invention 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 invention, and are not used to limit the present invention.

[0033] This embodiment provides a narrow channel impeller. Figure 1A schematic diagram of the structural decomposition of a narrow channel impeller provided in this embodiment.

[0034] like Figure 1 As shown, the narrow channel impeller of this embodiment includes: a cover plate 1 and a shaft plate 3. The cover plate 1 includes a plurality of blades 2. The blades 2 include a main body 21 and a connecting portion 22. The main body 21 is arranged on the cover plate 1. The connecting portion 22 is arranged at an end of the main body 21 away from the cover plate 1. The shaft plate 3 is located on a side of the cover plate 1 where the blades 2 are arranged. A plurality of welding grooves 4 are arranged on a side of the shaft plate 3 away from the cover plate 1. The positions of the welding grooves 4 correspond to the blades 2. The connecting portion of each blade 2 is connected to the bottom of a welding groove 4. The width of the connecting portion 22 is adapted to the width of the bottom of the welding groove 4.

[0035] For some examples, see Figure 1 The narrow channel impeller of this embodiment is made of martensitic precipitation hardened stainless steel (FV520B), 520B stainless steel or low alloy high strength steel (KMN). Such a configuration can meet the strength requirements of the impeller and has good corrosion resistance. However, it can be understood that in other embodiments, the narrow channel impeller can also be made of other materials as long as the use requirements are met. This embodiment does not impose too many restrictions on this.

[0036] In some examples, such as Figure 1 As shown, the cover plate 1 and the plurality of blades 2 are an integrally formed structure. For example, the blank of the cover plate 1 is first machined, and then the plurality of blades 2 are machined on the blank of the cover plate 1. Machining methods include turning, milling, etc., and this embodiment does not impose too many restrictions on this. Such a configuration is conducive to improving the structural strength of the impeller.

[0037] Figure 2 Schematic diagram of the main body 21 of a blade 2 provided in this embodiment. Figure 2 As shown, the main body 21 of the plurality of blades 2 radially extends from the middle to the edge of the cover plate 1, and the main body 21 of the blade 1 has a certain curvature. The width of the main body 21 of the blade 2 gradually increases from the middle to the edge of the cover plate 1.

[0038] For some examples, see Figure 2 The linear shape of the connecting portion 22 matches the linear shape of the main body 21, the linear shape of the welding groove 4 matches the linear shape of the connecting portion 22, and the length of the welding groove 4 is equal to the length of the connecting portion 22. Such an arrangement can make the connection between the blade 2 and the shaft disc 3 more stable and reliable.

[0039] In some examples, such as Figure 1 As shown, the bottom width of the welding groove 4 is smaller than the opening width. Such arrangement enables the welding rod or welding gun to smoothly extend into the bottom of the welding groove 4, which is convenient for operation.

[0040] When manufacturing the narrow channel impeller of this embodiment, if the shaft disc 3 is to be connected to the connecting portion 22 of the blade 2, it is necessary to weld through the bottom of the welding groove 4 so as to connect the connecting portion 22 of the blade 2 and the shaft disc 3 together through solder, thereby realizing the overall assembly of the shaft disc 3 and the cover disc 1 to form a narrow channel impeller.

[0041] The narrow channel impeller of this embodiment includes a cover plate 1 and a shaft plate 3. The cover plate 1 includes a plurality of blades 2. The blades 2 include a main body 21 and a connecting portion 22. The connecting portion 22 is used to connect with the bottom of the welding groove 4 on the shaft plate 3, and the width of the connecting portion 22 is adapted to the width of the bottom of the welding groove 4. During welding, a unified welding specification can be adopted, the weld is formed in one step, and the problems of the blade 2 being broken through, the blade 2 being unable to fuse with the bottom of the welding groove 4, and the weld being unable to sink out are avoided, thereby reducing the welding difficulty and improving the welding strength and product quality.

[0042] In some embodiments, Figure 1 As shown, the cross section of the blade 2 is T-shaped, including a vertical portion and a transverse portion connected to each other. The vertical portion is the main body portion 21 and the transverse portion is the connecting portion 22.

[0043] In some examples, such as Figure 1 As shown, the main body 21 and the connecting portion 22 are an integrally formed structure. For example, the main body 21 and the connecting portion 22 are integrally processed by milling. Such a configuration can ensure the structural strength of the blade 2 and is conducive to ensuring the smoothness of the air duct in the impeller.

[0044] In some examples, such as Figure 1 , Figure 2 As shown, in the extension direction of the main body 21, the width of the connecting portion 22 is always the same and is adapted to the bottom width of the welding groove 4. Such an arrangement is conducive to reducing the difficulty of welding the blade 1 and the shaft disc 3 and improving the welding quality.

[0045] The cross section of the blade 2 of this embodiment is T-shaped, and the width of the connecting portion 22 is greater than that of the main body 21 , which can prevent the blade 2 from being damaged due to insufficient width.

[0046] In some embodiments, see Figure 1 and Figure 2 , the width of the connecting portion 22 is equal to the maximum width of the main body 21.

[0047] In some examples, such as Figure 2As shown, the main body 21 of the plurality of blades 2 extends radially from the middle of the cover plate 1 to the edge, and has a certain curvature. The width of the main body 21 of the blade 2 gradually increases from the middle of the cover plate 1 to the edge. The width of the connecting portion 22 is equal to the maximum width of the main body 21. Such a setting can prevent the width of the connecting portion 22 from being too large, resulting in the blade 2 and the shaft plate 3 being unable to merge, affecting the welding quality.

[0048] It is understandable that the width of the connecting portion 22 is equal to the maximum width of the main body 21 , so when the cross section of the blade 2 is obtained at the maximum width of the main body 21 , the cross section of the blade 2 does not have a T-shaped feature but is square.

[0049] The width of the connecting portion 22 of this embodiment is equal to the maximum width of the main body 21 , which can avoid breakdown in the narrow part of the main body 21 of the blade 2 and avoid the connection portion 22 being too wide, resulting in insufficient welding current intensity and failure to fuse the blade 2 and the shaft disc 3 .

[0050] In some embodiments, Figure 1 As shown, from the bottom of the welding groove 4 to the opening side of the welding groove 4, the welding groove 4 includes a first groove section 41 and a second groove section 42. The width of the second groove section 42 is greater than the width of the first groove section 41. The groove bottom width of the first groove section 41 is adapted to the width of the connecting portion 22.

[0051] In some examples, such as Figure 1 As shown, the bottom width of the second slot section 42 is equal to the opening width of the first slot section 41. This arrangement facilitates the welding rod or welding gun to extend into the bottom of the first slot section 41, which helps to reduce the difficulty of operation.

[0052] The welding groove 4 of this embodiment includes a first groove section 41 and a second groove section 42, and the width of the second groove section 42 is greater than that of the first groove section 41. The groove bottom width of the first groove section 41 is adapted to the width of the connecting portion 22, which facilitates the welding of the blade 2 and helps to reduce the difficulty of welding operation.

[0053] In some embodiments, Figure 1 As shown, from the bottom of the first slot section 41 to the direction of the second slot section 42, the side wall of the first slot section 41 includes a first inclined surface 411 and a first vertical surface 412 connected to each other. The angle between the first inclined surfaces 411 on both sides of the first slot section 41 is α, and α is 45° to 50°.

[0054] In the first groove section 41 of this embodiment, the angle between the first inclined surfaces 411 on both sides is 45° to 50°, which facilitates the welding rod or welding gun to extend into the groove bottom of the first groove section 41, can reduce the difficulty of welding operation and improve welding quality.

[0055] In some embodiments, Figure 1As shown, from the first slot section 41 to the second slot section 42, the side wall of the second slot section 42 includes a second inclined surface 421 and a second vertical surface 422 connected to each other. The angle between the second inclined surfaces 421 on both sides of the second slot section 42 is β, and β is 85° to 90°.

[0056] In the second groove section 42 of this embodiment, the angle between the second inclined surfaces 421 on both sides is 85°~90°, that is, the inclination of the second inclined surface 421 is greater than the inclination of the first inclined surface 411. Such a setting can facilitate the insertion of the welding rod or welding gun into the first groove section 41, which can reduce the difficulty of welding operation and improve the welding quality.

[0057] In some embodiments, Figure 1 As shown, the width of the connecting portion 22 is D. The width of the bottom of the welding groove 4 is D+d. d is 0.3-0.7 mm.

[0058] In an example, d is 0.5 mm, which can meet the width requirement of the welding connection.

[0059] The bottom width of the welding groove 4 of this embodiment is larger than the width of the connecting portion 22. When the connecting portion 22 of the blade 2 is welded to the shaft disc 3 through the welding groove 4, it can ensure that the connecting portion 22 is in full contact with the groove body of the welding groove 4, which is beneficial to improving the welding quality.

[0060] Figure 3 This is a schematic structural diagram of a cover plate 1 provided in this embodiment. Figure 4 This is a schematic structural diagram of a shaft disc 3 provided in this embodiment. Figure 5 A schematic diagram of the combined state of a cover disc 1 and a shaft disc 3 provided in this embodiment.

[0061] In some embodiments, Figures 3 to 5 As shown, the narrow channel impeller further includes: a recessed stop 11 and a raised stop 31. The recessed stop 11 is arranged on the outer peripheral surface of the cover disc 1 along the circumference of the cover disc 1, and the recessed stop 11 is located on the side of the cover disc 1 where the blades 2 are arranged. The raised stop 31 is arranged on the side of the shaft disc 3 away from the welding groove 4 along the circumference of the shaft disc 3, and the raised stop 31 is inserted into the recessed stop 11.

[0062] In some examples, such as Figure 3 As shown, the concave stop 11 is arranged on the outer periphery of the cover plate 1 and extends from the edge of the blade 2 to the side of the cover plate 1 away from the blade 2. The raised stop 31 is arranged on the side of the shaft plate 3 facing the blade 2 and extends along the edge of the side. The inner diameter of the raised stop 31 is larger than the outer diameter of the concave stop 11. With such arrangement, when the shaft plate 3 is connected to the cover plate 1, the raised stop 31 is inserted into the concave stop 11.

[0063] In this embodiment, the recessed stop 11 cooperates with the raised stop 31 to limit the shaft disc 3 and the cover disc 1 during welding, thereby ensuring the accuracy of the connection.

[0064] In some embodiments, see Figure 5 The recessed stopper 11 and the raised stopper 31 are connected by welding.

[0065] For some examples, see Figure 5 , a full circle is welded between the sunken stop 11 and the raised stop 31. Such arrangement is beneficial to improving the appearance quality of the impeller.

[0066] When the shaft disk 3 of this embodiment is connected to the cover disk 1, the raised stop 31 is inserted into the recessed stop 11 and the recessed stop 11 and the raised stop 31 are connected by welding, which can make the connection between the shaft disk 3 and the cover disk 1 more firm and tight, which is beneficial to improving the structural strength of the impeller.

[0067] In some embodiments, see Figure 1 , the welding groove 4 is filled with solder.

[0068] For some examples, see Figure 1 The welding groove 4 and the connection part 22 of the blade 2 are welded by argon arc welding (TIG) to seal the bottom, and then the welding groove is filled by manual arc welding (SMAW). The use of argon arc welding to weld the bottom is conducive to reducing weld defects and avoiding welding leakage and lack of welding. The use of manual arc welding for filling welding can further improve the reliability of the connection between the cover plate and the shaft plate and the weld quality, which is conducive to improving the overall performance of the impeller.

[0069] In this embodiment, the welding groove 4 is filled with solder, which improves the reliability of the connection between the cover plate 1 and the shaft plate 3, thereby improving the performance of the impeller.

[0070] 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.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred implementations of the present invention. 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 invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A narrow channel impeller, characterized in that: include: A cover plate, the cover plate comprising a plurality of blades; the blades comprising a main body and a connecting part; the main body is arranged on the cover plate; The connecting portion is arranged at an end of the main body away from the cover plate; A shaft disc, the shaft disc is located on the side of the cover disc where the blades are provided; a plurality of welding grooves are provided on the side of the shaft disc away from the cover disc; the positions of the welding grooves correspond to the blades; the connecting portion of each blade is connected to the bottom of a welding groove; the width of the connecting portion is adapted to the width of the bottom of the welding groove.

2. The narrow channel impeller according to claim 1, characterized in that: The cross section of the blade is T-shaped, and includes a vertical portion and a transverse portion connected to each other; the vertical portion is the main body portion; and the transverse portion is the connecting portion.

3. The narrow channel impeller according to claim 1, characterized in that: The width of the connecting portion is equal to the maximum width of the main body portion.

4. The narrow channel impeller according to claim 1, characterized in that: From the bottom of the welding groove to the opening side of the welding groove, the welding groove includes a first groove section and a second groove section; The width of the second slot section is greater than that of the first slot section; and the width of the slot bottom of the first slot section is adapted to the width of the connecting portion.

5. The narrow channel impeller according to claim 4, characterized in that: From the bottom of the first slot section to the second slot section, the side wall of the first slot section includes a first inclined surface and a first vertical surface connected to each other; the angle between the first inclined surfaces on both sides of the first slot section is α, and α is 45° to 50°.

6. The narrow channel impeller according to claim 4, characterized in that: In the direction from the first slot section to the second slot section, the side wall of the second slot section includes a second inclined surface and a second vertical surface connected to each other; the angle between the second inclined surfaces on both sides of the second slot section is β, and β is 85° to 90°.

7. The narrow channel impeller according to claim 1, characterized in that: The width of the connecting portion is D; the width of the bottom of the welding groove is D+d; d is 0.3-0.7 mm.

8. The narrow channel impeller according to claim 1, characterized in that: Also includes: A recessed stopper is arranged on the outer peripheral surface of the cover plate along the circumference of the cover plate, and the recessed stopper is located on a side of the cover plate where the blade is arranged; The raised stop is arranged on a side of the shaft disc away from the welding groove along the circumference of the shaft disc, and the raised stop is inserted into the recessed stop.

9. The narrow channel impeller according to claim 8, characterized in that: The recessed stopper and the raised stopper are connected by welding.

10. The narrow channel impeller according to claim 1, characterized in that: The soldering groove is filled with solder.

Images