A multi-stage submersible pump

Abstract

The utility model belongs to water pump technical field especially points to a kind of multistage submersible pump, including base, the base upper end is equipped with water outlet, lower end is equipped with water inlet, the base is equipped with guide vane and lower bearing seat, the guide vane is provided with multiple, lower bearing seat is located between water inlet and the lowermost guide vane, the water outlet and water inlet are respectively fixedly installed on base, between water inlet and lower bearing seat, between lower bearing seat and the lowermost guide vane, between adjacent two guide vanes, and between the uppermost guide vane and water outlet respectively be equipped with circumferential limiting structure, and be limited by circumferential limiting structure circumferentially, the circumferential limiting structure includes the boss and opening slot of mutual clamping. The utility model is convenient to install, and assembly time consumption is short, and production efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a multi-stage submersible pump. Background Technology

[0002] To prevent relative circumferential motion between guide vanes, between guide vanes and bearing housings, between guide vanes and outlet components, and between bearing housings and inlet components, which could cause wear on parts, traditional multistage pumps rely on axial interference fit to keep all axial parts in a compressed state. If the interference fit is insufficient, adjusting shims are used to ensure that all axial parts are compressed.

[0003] Adjusting shims to keep the axial parts in a compressed state is inconvenient for assembly, takes a long time, and results in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage submersible pump that is easy to install, quick to assemble, and has high production efficiency.

[0005] This utility model is implemented as follows: A multi-stage submersible pump includes a base, with an outlet at the upper end and an inlet at the lower end. The base contains guide vanes and a lower bearing housing. Multiple guide vanes are provided. The lower bearing housing is located between the inlet and the lowest guide vane. The outlet and inlet are fixedly mounted on the base. Circumferential limiting structures are provided between the inlet and the lower bearing housing, between the lower bearing housing and the lowest guide vane, between two adjacent guide vanes, and between the uppermost guide vane and the outlet. These circumferential limiting structures provide circumferential restraint. Each circumferential limiting structure includes interlocking bosses and opening grooves.

[0006] In the aforementioned multi-stage submersible pump, the upper ends of the inlet component, the lower bearing housing, and the guide vane are respectively provided with the boss; the lower ends of the lower bearing housing, the guide vane, and the outlet component are respectively provided with the opening groove.

[0007] In the aforementioned multi-stage submersible pump, the upper end faces of the inlet component, the lower bearing housing, and the guide vane are respectively recessed to form annular mounting grooves, and the bosses are disposed in the corresponding annular mounting grooves, with the bosses closely attached to the sidewalls of the annular mounting grooves; the lower end faces of the lower bearing housing, the guide vanes, and the outlet component are respectively convex to form convex rings, and the convex rings are installed in the corresponding annular mounting grooves, with the opening grooves disposed on the corresponding convex rings.

[0008] In the aforementioned multi-stage submersible pump, after installation, a gap is left between the upper end face of the boss and the inner end face of the opening groove.

[0009] In the aforementioned multi-stage submersible pump, metal plates are respectively provided between the lower bearing housing and the lowest guide vane, and between two adjacent guide vanes. The edges of the metal plates are set in corresponding annular mounting grooves, and the lower end of the convex ring is pressed on the corresponding metal plate. The outer periphery of the metal plate is provided with a clearance groove 11 for clearance bosses.

[0010] In the aforementioned multi-stage submersible pump, the circumferential limiting structure has multiple components evenly distributed around its circumference, and the number of these components is the same as the number of guide vanes.

[0011] In the aforementioned multi-stage submersible pump, a central bearing housing is provided in the middle of the base, and circumferential limiting structures are respectively provided between the central bearing housing and the guide vane above it, and between the central bearing housing and the guide vane below it.

[0012] In the aforementioned multi-stage submersible pump, a connector is provided on the side wall of the base. The connector includes a limiting part located outside the base and a connecting part extending into the base. The outlet part is provided with a bolt arranged axially in a vertical direction, and the shank of the bolt passes through the outlet part and is screwed to the connecting part.

[0013] In the aforementioned multi-stage submersible pump, the lower end of the outlet component is disposed within the base, and the recessed side wall of the outlet component forms an assembly groove with the base for installing the connecting part.

[0014] In the aforementioned multi-stage submersible pump, multiple connectors and bolts are evenly distributed around the circumference.

[0015] In the aforementioned multi-stage submersible pump, the upper end of the inlet component is disposed inside the base, and the inlet component is fixedly mounted on the base by screws. The screws are disposed on the side wall of the base, and the shank of the screws passes through the base and is screwed to the inlet component.

[0016] In the aforementioned multi-stage submersible pump, multiple screws are evenly distributed around the circumference.

[0017] The outstanding advantages of this utility model compared to the prior art are: This utility model fixes the water outlet and water inlet components on the base. Circumferential limiting structures are provided between the water inlet component and the lower bearing seat, between the lower bearing seat and the lowest guide vane, between two adjacent guide vanes, and between the highest guide vane and the water outlet component to restrict relative rotation, reduce component wear, and thus avoid performance degradation due to component wear. This results in high reliability of the submersible pump. In addition, the circumferential limiting structure of this utility model includes interlocking bosses and opening slots, making installation convenient, assembly time short, and production efficiency high. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 yes Figure 2 Enlarged view of point A.

[0021] Figure 4 yes Figure 2 Enlarged view of point B.

[0022] Figure 5 This is an exploded view of the water inlet, guide vane, and metal sheet of this utility model.

[0023] Figure 6 This is a perspective view of the water outlet component of this utility model.

[0024] Reference numerals: 1. Base; 2. Outlet component; 3. Inlet component; 4. Guide vane; 5. Lower bearing housing; 6. Boss; 7. Opening groove; 8. Annular mounting groove; 9. Protruding ring; 10. Metal sheet; 11. Clearance groove; 12. Connecting component; 12a. Limiting part; 12b. Connecting part; 13. Bolt; 14. Assembly groove; 15. Screw; 16. Middle bearing housing. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —6: A multi-stage submersible pump includes a base 1. The base 1 has an outlet 2 at its upper end and an inlet 3 at its lower end. The base 1 contains guide vanes 4 and a lower bearing seat 5. Multiple guide vanes 4 are provided. The lower bearing seat 5 is located between the inlet 3 and the lowermost guide vane 4. The outlet 2 and the inlet 3 are respectively fixedly installed on the base 1. Circumferential limiting structures are provided between the inlet 3 and the lower bearing seat 5, between the lower bearing seat 5 and the lowermost guide vane 4, between two adjacent guide vanes 4, and between the uppermost guide vane 4 and the outlet 2. The circumferential limiting structures provide circumferential limiting. The circumferential limiting structures include interlocking bosses 6 and opening grooves 7.

[0026] like Figure 1-6 As shown, this utility model fixes the water outlet component 2 and the water inlet component 3 on the base 1. Circumferential limiting structures are provided between the water inlet component 3 and the lower bearing seat 5, between the lower bearing seat 5 and the lowermost guide vane 4, between two adjacent guide vanes 4, and between the uppermost guide vane 4 and the water outlet component 2 to restrict relative rotation, reduce wear on parts, and thus avoid performance degradation due to wear on parts. The submersible pump has good reliability. At the same time, the circumferential limiting structure of this utility model includes interlocking bosses 6 and opening grooves 7, which are convenient to install, have short assembly time, and high production efficiency.

[0027] The specific locations of the boss 6 and the opening groove 7 are as follows: the boss 6 is provided at the upper end of the water inlet 3, the lower bearing seat 5 and the guide vane 4 respectively; the opening groove 7 is provided at the lower end of the lower bearing seat 5, the guide vane 4 and the water outlet 2 respectively.

[0028] Furthermore, the upper end faces of the water inlet 3, the lower bearing seat 5, and the guide vane 4 are respectively recessed to form annular mounting grooves 8, and the boss 6 is set in the corresponding annular mounting groove 8, and the boss 6 is in close contact with the side wall of the annular mounting groove 8; the lower end faces of the lower bearing seat 5, the guide vane 4, and the water outlet 2 are respectively convex to form convex rings 9, the convex rings 9 are installed in the corresponding annular mounting grooves 8, and the opening groove 7 is set on the corresponding convex ring 9.

[0029] To avoid assembly interference, a gap is left between the upper end face of the boss 6 and the inner end face of the opening groove 7 after installation.

[0030] Furthermore, metal sheets 10 are provided between the lower bearing seat 5 and the lowest guide vane 4, as well as between two adjacent guide vanes 4. The edges of the metal sheets 10 are set in the corresponding annular mounting grooves 8, and the lower end of the convex ring 9 is pressed on the corresponding metal sheet 10. The outer periphery of the metal sheet 10 is provided with a clearance groove 11 for the clearance boss 6.

[0031] To achieve a better circumferential limiting effect, the circumferential limiting structure has multiple components evenly distributed around its circumference, and the number of components is the same as the number of blades on the guide vane 4.

[0032] Furthermore, a central bearing seat 16 is provided in the middle of the base 1, and the circumferential limiting structure is provided between the central bearing seat 16 and the guide vane 4 above it, and between the central bearing seat 16 and the guide vane 4 below it.

[0033] The water outlet component 2 is fixedly installed with the base 1 as follows: A connector 12 is provided on the side wall of the base 1. The connector 12 includes a limiting part 12a located outside the base 1 and a connecting part 12b extending into the base 1. The water outlet component 2 is provided with a bolt 13 arranged axially in a vertical direction. The shank of the bolt 13 passes through the water outlet component 2 and is screwed to the connecting part 12b. The structure is simple, easy to process and install, and the connection is firm and reliable.

[0034] The limiting part 12a abuts against the side wall of the base 1 to limit the connection part 12b radially, preventing the connector 12 from completely entering the base 1; at the same time, the connection part 12b is locked in the mounting hole of the base 1 to limit the connection part 12b axially.

[0035] Furthermore, the lower end of the water outlet 2 is disposed inside the base 1, and the side wall of the water outlet 2 is recessed to form an assembly groove 14 for installing the connecting part 12b between the recess and the base 1.

[0036] To improve connection strength, multiple connectors 12 and bolts 13 are evenly distributed around their circumference. In this embodiment, four connectors 12 and four bolts 13 are evenly distributed around their circumference.

[0037] The water inlet component 3 is fixedly installed in the base 1. The upper end of the water inlet component 3 is set inside the base 1. The water inlet component 3 is fixedly installed on the base 1 by screws 15. The screws 15 are set on the side wall of the base 1, and the shank of the screws 15 passes through the base 1 and is screwed to the water inlet component 3.

[0038] To improve connection strength, multiple screws 15 are evenly distributed around the circumference. In this embodiment, four screws 15 are distributed around the circumference.

[0039] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-stage submersible pump, comprising a base (1), wherein the base (1) has an outlet (2) at its upper end and an inlet (3) at its lower end, and guide vanes (4) and a lower bearing seat (5) are provided inside the base (1), wherein multiple guide vanes (4) are provided, and the lower bearing seat (5) is located between the inlet (3) and the lowermost guide vane (4), characterized in that: The water outlet (2) and water inlet (3) are respectively fixedly installed on the base (1). The water inlet (3) and the lower bearing seat (5), the lower bearing seat (5) and the lowermost guide vane (4), the two adjacent guide vanes (4), and the uppermost guide vane (4) and the water outlet (2) are respectively provided with circumferential limiting structures, and are circumferentially limited by the circumferential limiting structures. The circumferential limiting structures include interlocking bosses (6) and opening slots (7).

2. The multi-stage submersible pump according to claim 1, characterized in that: The upper ends of the water inlet (3), the lower bearing seat (5) and the guide vane (4) are respectively provided with the boss (6); the lower ends of the lower bearing seat (5), the guide vane (4) and the water outlet (2) are respectively provided with the opening groove (7).

3. A multi-stage submersible pump according to claim 2, characterized in that: The upper surfaces of the water inlet (3), the lower bearing seat (5), and the guide vane (4) are respectively recessed to form annular mounting grooves (8), and the boss (6) is set in the corresponding annular mounting groove (8), and the boss (6) is close to the side wall of the annular mounting groove (8); the lower surfaces of the lower bearing seat (5), the guide vane (4), and the water outlet (2) are respectively convex to form convex rings (9), and the convex rings (9) are installed in the corresponding annular mounting grooves (8), and the opening groove (7) is set on the corresponding convex rings (9).

4. A multi-stage submersible pump according to claim 3, characterized in that: Metal plates (10) are provided between the lower bearing seat (5) and the lowest guide vane (4), and between two adjacent guide vanes (4). The edge of the metal plate (10) is set in the corresponding annular mounting groove (8). The lower end of the convex ring (9) is pressed on the corresponding metal plate (10). The outer periphery of the metal plate (10) is provided with a clearance groove (11) for the clearance boss (6).

5. A multi-stage submersible pump according to claim 1, characterized in that: The circumferential limiting structure has multiple components evenly distributed around its circumference, and the number of components is the same as the number of blades of the guide vane (4).

6. A multi-stage submersible pump according to claim 1, characterized in that: The base (1) is provided with a central bearing seat (16) in the middle. The central bearing seat (16) is provided with the guide vane (4) above it and with the guide vane (4) below it. The circumferential limiting structure is provided between the central bearing seat (16) and the guide vane (4) above it.

7. A multi-stage submersible pump according to claim 1, characterized in that: The side wall of the base (1) is provided with a connector (12), the connector (12) includes a limiting part (12a) located outside the base (1) and a connecting part (12b) extending into the base (1). The water outlet (2) is provided with a bolt (13) arranged axially in the vertical direction. The shank of the bolt (13) passes through the water outlet (2) and is screwed to the connecting part (12b).

8. A multi-stage submersible pump according to claim 7, characterized in that: The lower end of the water outlet (2) is disposed inside the base (1), and the side wall of the water outlet (2) is recessed to form an assembly groove (14) for installing the connecting part (12b) between the recess and the base (1).

9. A multi-stage submersible pump according to claim 1, characterized in that: The upper end of the water inlet component (3) is set inside the base (1). The water inlet component (3) is fixedly installed on the base (1) by screws (15). The screws (15) are set on the side wall of the base (1), and the shank of the screws (15) passes through the base (1) and is screwed to the water inlet component (3).

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