Impeller assembly and submersible pump

Abstract

The application relates to the technical field of submersible pumps, in particular to a impeller assembly and a submersible pump, and more particularly to a impeller assembly and a submersible pump, which comprises: an impeller; a cover plate arranged on one side of the impeller; and a bottom plate arranged on the other side of the impeller; wherein the impeller comprises a base plate, a plurality of blades are arranged on the base plate in a circumferential direction at intervals, the blades have an inlet end and an outlet end, the inlet end is arranged close to a central axis of the base plate, the outlet end is arranged away from the central axis of the base plate, a demolding guide part is arranged on an outer side wall of the blade, the demolding guide part is arranged close to the outlet end, the demolding guide part has a first side and a second side arranged in sequence from the inlet end to the outlet end, a special-shaped hole is arranged on the outer side of the blade, the special-shaped hole has a first end and a second end arranged in sequence from the inlet end to the outlet end, and the second end of the special-shaped hole is connected with the first side of the demolding guide part; and the technical scheme can effectively avoid deformation of the impeller.

Description

Technical Field

[0001] This application relates to the field of submersible pump technology, and in particular to an impeller assembly and a submersible pump. Background Technology

[0002] Submersible pumps have advantages such as small footprint and high conveying efficiency, and are widely used in agricultural irrigation, industrial circulating water, municipal water supply and drainage, mine drainage, and emergency rescue. As a fluid conveying device that integrates a motor and a pump, the submersible pump relies on an impeller assembly to extract and transport liquids. The impeller assembly converts mechanical energy into liquid kinetic energy and pressure energy through rotation, and directly determines the submersible pump's flow rate, head, efficiency, and operational stability.

[0003] Patent No. 2018220591756 discloses a plastic impeller assembly structure for a submersible pump used in wells, which consists of three parts: an impeller front cover plate, an impeller rear cover plate, and an impeller upper cover plate. The impeller front cover plate has a mouth ring, and the impeller rear cover plate has a hub and 4-8 blades. The bottom of the blades is flat or curved, and welding energy lines I are evenly distributed around the circumference of the blades. Welding energy lines II are evenly distributed around the circumference of the groove in the impeller upper cover plate. The impeller upper cover plate and the impeller rear cover plate are ultrasonically welded to form an integral rear cover plate component, and the rear cover plate component and the impeller front cover plate are ultrasonically welded to form the impeller assembly. This impeller assembly has a simple structure and is easy to manufacture.

[0004] The impeller rear cover plate of the aforementioned patent has multiple notches. The notches make it easy for the impeller rear cover plate to undergo large deformation after demolding, which leads to installation difficulties. Utility Model Content

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides an impeller assembly and a submersible pump. The impeller assembly has high structural strength and can effectively prevent large deformation of the impeller.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: an impeller assembly, comprising: impeller; A cover plate is located on one side of the impeller; The base plate is located on the other side of the impeller; The impeller includes a base plate, on which multiple blades are spaced apart circumferentially. Each blade has an inlet end and an outlet end. The inlet end is located near the central axis of the base plate, and the outlet end is located away from the central axis of the base plate. A demolding guide is provided on the outer wall of the blade, near the outlet end. The demolding guide has a first side and a second side arranged sequentially from the inlet end to the outlet end. An irregular hole is provided on the outer side of the blade. The irregular hole has a first end and a second end arranged sequentially from the inlet end to the outlet end. The second end of the irregular hole is connected to the first side of the demolding guide.

[0007] In a preferred embodiment, the demolding guide is a sloping structure, a planar structure, or an arc-shaped surface structure.

[0008] In a preferred embodiment, the height of the blade decreases sequentially from the inlet end to the outlet end; the blade is provided with an outward expansion structure from the root to the top in the direction of the irregular hole, and the outward expansion structure is provided at the inlet end of the blade.

[0009] In a preferred embodiment, a first welding structure is provided between the impeller and the cover plate; and a second welding structure is provided between the impeller and the base plate.

[0010] In a preferred embodiment, the first welding structure includes a first welding energy line disposed at the top of the blade and a plurality of first recessed sections disposed on the cover plate, wherein each welding energy line is disposed corresponding to a first recessed section.

[0011] In a preferred embodiment, the substrate has a first surface and a second surface disposed opposite to each other, the blade is disposed on the first surface, and the second welding structure includes a plurality of second welding energy lines disposed on the second surface of the substrate and a plurality of second recessed sections disposed on the base plate, wherein the second welding energy lines are disposed corresponding to the second recessed sections.

[0012] In a preferred embodiment, the second recessed section includes a first arc-shaped section and a second arc-shaped section connected end to end. The first arc-shaped section and the second arc-shaped section are both arranged at intervals along the circumference of the bottom plate, and the second arc-shaped section is located near the edge of the bottom plate.

[0013] In a preferred embodiment, the base plate is provided with a plurality of irregular protrusions spaced apart along its circumference, each second recessed segment is located between two adjacent irregular protrusions, the irregular protrusions are provided in correspondence with the irregular holes, and the irregular protrusions and irregular holes are matched.

[0014] In a preferred embodiment, a through hole is provided at the center of the substrate, and a funnel-shaped protrusion is provided at the center of the bottom plate, the funnel-shaped protrusion passing through the through hole.

[0015] In a preferred embodiment, the root of the funnel-shaped protrusion is provided with a first annular contact surface, and the opening of the through hole is provided with a second annular contact surface, with the first annular contact surface and the second annular contact surface fitting together.

[0016] In a preferred embodiment, the cross-sections of both the first annular contact surface and the second annular contact surface are inclined planes.

[0017] In a preferred embodiment, a funnel-shaped protrusion is provided on the first side of the base plate, and a hub is provided on the second side of the base plate, the hub being used to connect with the drive component.

[0018] Another object of this application is to provide a submersible pump including the impeller assembly described above.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting an inclined surface on the outer wall of the blade and setting an irregular hole on the outer side of the blade, and the second end of the irregular hole is connected to the first side of the inclined surface, the inclined surface and the irregular hole can be processed in one step by a through-hole process, ensuring the smoothness and continuity between the second end of the irregular hole and the first side of the inclined surface; the technical solution of this application can avoid the existence of "gap" in the prior art, keep the substrate as a whole in a disk shape, thereby improving the structural strength of the entire impeller and effectively preventing deformation during processing. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of an impeller assembly according to this application; Figure 2 This is a schematic diagram of the structure of an impeller assembly according to this application; Figure 3 This is a schematic diagram of the structure of the cover plate of this application; Figure 4 This is one of the structural schematic diagrams of the impeller in this application; Figure 5 This is the second schematic diagram of the impeller structure in this application; Figure 6 This is one of the structural schematic diagrams of the base plate of this application; Figure 7 This is the second structural schematic diagram of the base plate of this application; Figure 8 This is an exploded view of an impeller assembly according to this application.

[0021] In the diagram: 1. Impeller; 2. Cover plate; 3. Base plate; 4. Base plate; 5. Irregularly shaped hole; 6. Demolding guide; 7. Through hole; 8. Outward expansion structure; 9. First welding energy line; 10. First recessed section; 11. Second welding energy line; 12. First arc-shaped section; 13. Second arc-shaped section; 14. Irregularly shaped protrusion; 15. Funnel-shaped protrusion; 16. Hub; 17. Blade; 18. Copper insert. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0023] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, the above terms should not be construed as a limitation of this utility model.

[0024] Please refer to Figures 1-4 and Figure 8As shown, this application discloses an impeller assembly and a submersible pump, including an impeller 1, a cover plate 2, and a base plate 3. The cover plate 2 and the base plate 3 are respectively connected to the impeller 1 and located on both sides of the impeller 1. The impeller 1 includes a disc-shaped base plate 4. Multiple blades 17 are arranged at intervals along the circumference of the base plate 4. Preferably, the number of blades 17 is 4 to 6. Each blade 17 has an inlet end and an outlet end. The inlet end is located near the central axis of the base plate 4, and the outlet end is located away from the central axis of the base plate 4. The blades 17 extend in an arc shape from the inlet end to the outlet end, and the arc direction is consistent with the rotation direction of the impeller 1. A demolding guide 6 is provided on the outer wall of the blade 17. The demolding guide 6 is located near the outlet end and has a first side and a second side arranged sequentially from the inlet end to the outlet end. A shaped hole 5 is provided on the outer side of the blade 17. The shaped hole 5 has a first end and a second end arranged sequentially from the inlet end to the outlet end. The second end of the shaped hole 5 is connected to the first side of the demolding guide 6. Specifically, the demolding guide 6 of this application includes, but is not limited to, a sloping structure, a planar structure, or an arc-shaped surface structure. By providing the demolding guide 6 on the outer wall of the blade 17, and simultaneously providing a shaped hole 5 on the outer side of the blade 17, with the second end of the shaped hole 5 connected to the first side of the demolding guide 6, the demolding guide 6 and the shaped hole 5 can be processed in one step through a through-hole process, ensuring the smoothness and continuity between the second end of the shaped hole 5 and the first side of the demolding guide 6. If the shaped hole 5 and the demolding guide 6 are processed separately, there will inevitably be a docking error between them. This docking error will affect the flow characteristics of the fluid, such as causing eddies or energy loss. The technical solution of this application can avoid the existence of "gaps" in the prior art, keeping the substrate 4 in a disk shape, thereby improving the structural strength of the entire impeller 1, effectively preventing deformation during processing, and also improving the fatigue strength of the impeller 1. In addition, the demolding guide 6 is located at the outlet end, which can guide the fluid and make the fluid enter the vortex chamber of the submersible pump casing in a more orderly manner, reducing the impact and turbulence between the fluid and the pump casing.

[0025] To reduce flow losses, the height of the blades 17 decreases progressively from the inlet to the outlet. The higher height of the blades 17 at the inlet provides a wider flow channel, offering greater suction space and reducing fluid velocity at the inlet, thus minimizing eddies. As the fluid flows from the inlet to the outlet, the cross-sectional area of ​​the flow channel decreases accordingly with the gradual reduction in blade height. Simultaneously, the fluid velocity also gradually decreases, resulting in a better match between the fluid velocity and the flow channel cross-sectional area. This allows the fluid to flow smoothly and closely against the blades 17, reducing eddies and improving the efficiency of the submersible pump.

[0026] Please continue reading. Figure 4As shown, it should be noted that the outer wall of each blade 17 forms the sidewall of the irregular hole 5. An outward expansion structure 8 is provided on the blade 17 from its root to its tip, facing the irregular hole 5. The outward expansion structure 8 is located at the inlet end of the blade 17. Specifically, an arc-shaped wall is formed between the root and the tip of the blade 17, facing the corresponding irregular hole 5, causing the inlet end of the blade 17 to be in an "outward-facing" state. The outward expansion structure 8 expands the original flow channel, increases the suction space, and further reduces the flow velocity of the fluid at the inlet end, thereby improving the submersible pump's anti-cavitation performance.

[0027] like Figure 3 and Figure 4 As shown, the cover plate 2 is disc-shaped with an opening at its center. The impeller 1 and the cover plate 2 are ultrasonically welded together, and a first welding structure is provided between the impeller 1 and the cover plate 2. The bottom plate 3 is also disc-shaped, and the impeller 1 and the bottom plate 3 are ultrasonically welded together, with a second welding structure provided between the impeller 1 and the bottom plate 3. The first welding structure includes a first welding energy line 9 located at the top of the blade 17 and multiple first recessed sections 10 located on the cover plate 2. The first recessed sections 10 are spaced apart circumferentially along the cover plate 2, and each welding energy line corresponds to a first recessed section 10. Since the inlet end of the blade 17 has an outward expansion structure 8 with its top facing the side, the first welding energy line 9 is positioned to avoid the outward expansion structure 8 to ensure the welding effect between the impeller 1 and the cover plate 2. In short, the first welding energy line 9 is positioned continuously between the outward expansion structure 8 and the outlet end. It is understandable that the position, shape, and number of the first recessed segments 10 correspond one-to-one with the first welding energy lines 9. The first recessed segments 10 serve a positioning function. With the precise positioning of the first recessed segments 10, the first welding energy lines 9 can be well located within them. During ultrasonic welding, the energy of the ultrasonic waves is concentrated at the junction of the two, thereby ensuring the consistency and efficiency of the welding.

[0028] like Figure 5 and Figure 6As shown, the substrate 4 further comprises a first surface and a second surface arranged opposite to each other. The blade 17 is disposed on the first surface. The second welding structure includes a plurality of second welding energy lines 11 disposed on the second surface of the substrate 4, and a plurality of second recessed sections disposed on the base plate 3. The second recessed sections are spaced apart circumferentially along the base plate 3. The second welding energy lines 11 are correspondingly disposed to the second recessed sections, that is, the position, shape, and number of the second welding energy lines 11 correspond to the second recessed sections. The second recessed sections serve a positioning function. With the precise positioning of the second recessed sections, the second welding energy lines 11 can be well located within them. During ultrasonic welding, the energy of the ultrasonic waves is concentrated at the junction of the two, thereby ensuring the consistency and efficiency of the welding. In addition, the second recessed sections can accommodate molten solder, ensuring the welding depth while also ensuring the uniformity and consistency of the weld.

[0029] Furthermore, the second recessed section includes a first arc-shaped section 12 and a second arc-shaped section 13 connected end to end. Both the first arc-shaped section 12 and the second arc-shaped section 13 are arranged at intervals along the circumference of the base plate 3. The first arc-shaped section 12 is located between adjacent irregular protrusions 14, and the second arc-shaped section 13 is located near the edge of the base plate 3. On the one hand, the arrangement of the first arc-shaped section 12 and the second arc-shaped section 13 can improve the connection strength between the impeller 1 and the base plate 3. On the other hand, the arrangement of the arc-shaped sections can better disperse welding stress, reduce stress concentration, and prevent weld cracking.

[0030] The base plate 3 is provided with a plurality of irregularly shaped protrusions 14 spaced apart along its circumference. Each second recessed section is located between two adjacent irregularly shaped protrusions 14, that is, the irregularly shaped protrusions 14 and the second recessed sections are interspersed. The irregularly shaped protrusions 14 are correspondingly arranged with the irregularly shaped holes 5, and the irregularly shaped protrusions 14 and the irregularly shaped holes 5 cooperate with each other. During assembly, the irregularly shaped protrusions 14 on the base plate 3 can be precisely embedded into the irregularly shaped holes 5 on the impeller 1.

[0031] Please refer to Figures 5-7 As shown, in one embodiment of this disclosure, a through hole 7 is provided at the center of the substrate 4, and multiple blades 17 are arranged around the through hole 7. A funnel-shaped protrusion 15 is provided at the center of the base plate 3, and multiple irregularly shaped protrusions 14 are arranged around the funnel-shaped protrusion 15. The funnel-shaped protrusion 15 passes through the through hole 7. During assembly, the funnel-shaped protrusion 15 is inserted into the through hole 7, which facilitates the alignment of the substrate 4 and the base plate 3, making their central axes coincide and improving assembly efficiency. To improve sealing, a first annular contact surface is provided at the root of the funnel-shaped protrusion 15, and a second annular contact surface is provided at the opening of the through hole 7. The first annular contact surface and the second annular contact surface fit together to form a mechanical seal.

[0032] Specifically, both the first and second annular contact surfaces have inclined cross-sections. The combination of these two inclined surfaces achieves precise positioning and forms a tight mechanical seal, effectively preventing fluid leakage.

[0033] Preferably, the funnel-shaped protrusion 15 is located on the first side of the base plate 3, and a hub 16 is located on the second side of the base plate 3. The hub 16 is used to connect with the driving component, and the hub 16 and the funnel-shaped protrusion 15 are coaxially arranged. Specifically, the driving component is a motor, and the output shaft of the motor is connected to the hub 16. The hub 16 and the base plate 3 are an integral structure. The motor transmits power to the base plate 3, and the base plate 3 then transmits it to the impeller 1, thereby driving the impeller 1 to rotate. By setting the hub 16 on the base plate 3, the connection between the hub 16 and the motor output shaft is an integral unit. The torque of the motor acts on the base plate 3, thereby ensuring that the impeller 1 has good strength and is not easily deformed.

[0034] To improve the reliability and stability of the connection between the hub 16 and the motor, a copper insert 18 is also provided inside the hub 16.

[0035] Another embodiment of this application provides a submersible pump, including the impeller assembly described in the above embodiment.

[0036] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An impeller assembly, characterized in that, include: Impeller (1); Cover plate (2) is provided on one side of impeller (1); The base plate (3) is located on the other side of the impeller (1); The impeller (1) includes a base plate (4), on which a plurality of blades (17) are arranged at intervals along its circumference. Each blade (17) has an inlet end and an outlet end. The inlet end is located near the central axis of the base plate (4), and the outlet end is located away from the central axis of the base plate (4). A demolding guide (6) is provided on the outer wall of the blade (17). The demolding guide (6) is located near the outlet end. The demolding guide (6) has a first side and a second side arranged sequentially from the inlet end to the outlet end. A shaped hole (5) is provided on the outer side of the blade (17). The shaped hole (5) has a first end and a second end arranged sequentially from the inlet end to the outlet end. The second end of the shaped hole (5) is connected to the first side of the demolding guide (6).

2. The impeller assembly according to claim 1, characterized in that, The height of the blade (17) decreases sequentially from the inlet end to the outlet end; the blade (17) is provided with an outward expansion structure (8) from the root to the top in the direction of the irregular hole (5), and the outward expansion structure (8) is provided at the inlet end of the blade (17).

3. The impeller assembly according to claim 1, characterized in that, A first welding structure is provided between the impeller (1) and the cover plate (2); a second welding structure is provided between the impeller (1) and the base plate (3).

4. The impeller assembly according to claim 3, characterized in that, The first welding structure includes a first welding energy line (9) disposed on the top of the blade (17) and a plurality of first recessed sections (10) disposed on the cover plate (2), each welding energy line being disposed corresponding to the first recessed section (10); the substrate (4) has a first surface and a second surface disposed opposite to each other, the blade (17) is disposed on the first surface, and the second welding structure includes a plurality of second welding energy lines (11) disposed on the second surface of the substrate (4) and a plurality of second recessed sections disposed on the base plate (3), the second welding energy lines (11) being disposed corresponding to the second recessed sections.

5. The impeller assembly according to claim 4, characterized in that, The second recessed section includes a first arc-shaped section (12) and a second arc-shaped section (13) connected end to end. The first arc-shaped section (12) and the second arc-shaped section (13) are both arranged at intervals along the circumference of the bottom plate (3), and the second arc-shaped section (13) is set near the edge of the bottom plate (3).

6. The impeller assembly according to claim 4, characterized in that, The base plate (3) is provided with a plurality of irregular protrusions (14) spaced apart along its circumference. Each second recessed section is located between two adjacent irregular protrusions (14). The irregular protrusions (14) are correspondingly arranged with the irregular holes (5), and the irregular protrusions (14) and the irregular holes (5) are matched.

7. The impeller assembly according to claim 1, characterized in that, The substrate (4) has a through hole (7) at its center, and the bottom plate (3) has a funnel-shaped protrusion (15) at its center, which passes through the through hole (7).

8. The impeller assembly according to claim 7, characterized in that, The funnel-shaped protrusion (15) has a first annular contact surface at its root and a second annular contact surface at the opening of the through hole (7). The first annular contact surface and the second annular contact surface are in contact.

9. The impeller assembly according to claim 7, characterized in that, A funnel-shaped protrusion (15) is provided on the first side of the base plate (3), and a hub (16) is provided on the second side of the base plate (3). The hub (16) is used to connect with the drive component.

10. A submersible pump, characterized in that, Includes the impeller assembly described in any one of claims 1 to 9.

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