Guide bearing structure submersible pump

Abstract

This utility model discloses a submersible pump with a guide bearing structure. The submersible pump includes a housing and a shaft coupling, as well as multiple guide vanes and multiple impellers. A guide bearing is provided between the top of the hub of each impeller and the guide vane above it to reduce the connection gap between the hub and the guide vane. A support pad assembly is provided between the bottom of the hub of each impeller and the guide vane below it. This utility model relates to the field of submersible pump technology. The outlet housing and coupling, after being assembled with the pump set, form an integral outer cylinder structure, effectively preventing interstage leakage and improving the pump's working efficiency. Wear-resistant sleeves are installed on the impeller hubs, which cooperate with the rubber bearings installed inside the guide vanes to effectively prevent impeller wear and make the impeller run more smoothly. It also reduces the gap between the guide vanes and the impellers, not only reducing leakage but also making the impeller run more smoothly. This significantly increases the service life of the submersible pump.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, specifically a submersible pump with a guide bearing structure. Background Technology

[0002] Currently, most submersible pumps in China employ an integral floating structure. This structure has numerous drawbacks. The multiple impeller stages are in contact, influencing, and restricting each other, leading to extremely high assembly difficulty. Even slight carelessness can cause assembly problems. Furthermore, the axial forces of the multiple stages act entirely on the motor shaft, causing excessive pressure on the motor and making it prone to damage, increasing the equipment's failure rate and maintenance costs. The disadvantages of this structure also include the high assembly difficulty, large space required for pump component assembly, and unstable impellers during operation, leading to mutual wear. This not only reduces the submersible pump's service life but also affects its working efficiency. Therefore, there is an urgent need to produce a submersible pump with a simple structure, easy disassembly and maintenance, small structural space, stable operation, and durability to meet actual production and usage needs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a submersible pump with a guide bearing structure, which solves the problems of difficult assembly, inconvenient maintenance, easy sand jamming, and wear of existing submersible pumps.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a submersible pump with a guide bearing structure, the submersible pump including a housing and a shaft coupling, the shaft coupling being rotatably connected inside the housing;

[0005] It also includes multiple guide vanes and multiple impellers, which are alternately arranged in sequence in the housing along the axial direction of the shaft coupling. Each guide vane is arranged on the housing, and each impeller is arranged on the shaft coupling.

[0006] A clearance cavity is provided between each guide vane and the shaft coupling; a guide bearing is provided between the top of the hub of each impeller and the guide vane above it to reduce the connection gap between the hub and the guide vane, and the guide bearing is disposed in the clearance cavity; a support pad assembly is provided between the bottom of the hub of each impeller and the guide vane below it, and the support pad assembly is disposed in the clearance cavity.

[0007] Preferably, the guide bearing and the support pad assembly are disposed opposite to each other in the gap cavity, and a clamping cavity is formed between them.

[0008] Preferably, the guide bearing includes a wear-resistant sleeve and a rubber bearing fitted onto the top of the impeller hub, which are assembled as a single unit within the clearance cavity.

[0009] Preferably, the bottom of the wear-resistant sleeve is bent outward to form a bent portion for receiving the rubber bearing; a gap is left between the bent portion and the rubber bearing.

[0010] Preferably, a second gap cavity is left between the top of the impeller hub and the inner side of the rubber bearing.

[0011] Preferably, the support pad assembly includes a stacked wear-resistant pad assembly and a ceramic ring, which are assembled as a single unit within the gap cavity.

[0012] Preferably, the wear-resistant pad assembly includes wear-resistant pads and wear-resistant washers stacked on top of each other.

[0013] Preferably, the thickness of the wear-resistant pad is less than that of the wear-resistant washer.

[0014] Preferably, the ceramic ring is embedded in the guide vane, and a first gap cavity is formed between the inner side of the ceramic ring and the shaft coupling.

[0015] Preferably, the housing comprises:

[0016] Pump sleeve;

[0017] The outlet shell and the connecting frame are respectively threaded onto the upper and lower ends of the pump sleeve;

[0018] Multiple bearing housings clamp each of the guide vanes and are confined within the pump sleeve by the outlet casing and the coupling.

[0019] The beneficial effects of this utility model are as follows: By using the submersible pump with a guide bearing structure provided by this utility model, compared with the prior art, the outlet shell and coupling are assembled with the pump set to form an integral outer cylinder structure, effectively preventing interstage leakage and improving the pump's working efficiency. The wear-resistant sleeve installed on the impeller hub, in conjunction with the rubber bearing installed inside the guide vane, effectively prevents impeller wear and makes the impeller run more smoothly. It also reduces the gap between the guide vane and the impeller, not only reducing leakage but also making the impeller run more smoothly. This significantly increases the service life of the submersible pump. Attached Figure Description

[0020] Figure 1 This is an assembly drawing of the present utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0022] Explanation of the reference numerals in the figure:

[0023] 1. Connecting frame; 2. Shaft coupling; 3. Pump sleeve; 4. Guide vane; 5. Impeller; 6. Bearing housing; 7. Water outlet shell; 8. Wear-resistant sleeve; 9. Rubber bearing; 10. Ceramic ring; 11. Wear-resistant pad assembly; 12. Bending part; 13. Gap; 14. Wear-resistant gasket; 15. Wear-resistant washer; 16. First gap cavity; 17. Second gap cavity. Detailed Implementation

[0024] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. This utility model discloses a submersible pump with a guide bearing structure, including a housing and a shaft coupling, as well as multiple guide vanes and multiple impellers. A guide bearing is disposed between the top of the hub of each impeller and the guide vane above it to reduce the connection gap between the hub and the guide vane. A support pad assembly is disposed between the bottom of the hub of each impeller and the guide vane below it. The guide bearing and support pad assembly, disposed between the impeller and the guide vane, can effectively suppress problems such as large impeller vibration and severe wear. This structure is more wear-resistant, resistant to mud and sand, less prone to sand jamming and seizing, and increases service life.

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0026] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process.

[0027] like Figures 1 to 2 As shown in the embodiment of this application, a submersible pump with a guide bearing structure is proposed. The submersible pump includes a housing and a shaft coupling 2. The shaft coupling 2 is rotatably connected to the housing. Multiple guide vanes 4 and multiple impellers 5 are arranged inside the housing.

[0028] The submersible pump housing in this embodiment includes a pump sleeve 3 and multiple bearing seats 6, and also includes an outlet shell 7 and a connecting frame 1 respectively threaded onto the upper and lower ends of the pump sleeve 3. Quick-drying adhesive is applied to the connection points of the outlet shell 7 and the connecting frame 1 with the pump sleeve 3. After assembly with the pump sleeve 3, the outlet shell 7 and the connecting frame 1 form an integral outer cylinder structure, which can prevent interstage leakage.

[0029] Multiple guide vanes 4 and multiple impellers 5 are alternately arranged in sequence within the housing along the axial direction of the shaft coupling 2, forming a flow passage component; and bearing housing assemblies 6 cooperate with the shaft coupling 2 at both ends of the flow passage component to form support. Each guide vane 4 is held by two bearing housings 6 and is fixed within the pump sleeve 3 by the outlet shell 7 and the connecting frame 1. Each impeller 5 is mounted on the shaft coupling 2, and when the shaft coupling 2 rotates, it drives each impeller 5 to rotate via its shaft.

[0030] In this embodiment, a clearance cavity is provided between each guide vane 4 and the shaft coupling 2; a guide bearing is provided between the top of the hub of each impeller 5 and the guide vane 4 above it to reduce the connection gap between the hub and the guide vane 4; a support pad assembly is provided between the bottom of the hub of each impeller 5 and the guide vane 4 below it to prevent friction between the bottom of the hub of the impeller 5 and the guide vane 4. Furthermore, in this embodiment, both the guide bearing and the support pad assembly are disposed within the clearance cavity to ensure that the installation distance between the guide vane 4 and the impeller 5 remains unchanged after the guide bearing and the support pad assembly are installed.

[0031] In one exemplary installation method, a boss is provided inside the clearance cavity, dividing the clearance cavity into an upper cavity groove and a lower cavity groove. A support pad assembly is disposed in the upper cavity groove, and a guide bearing is disposed in the lower cavity groove. Furthermore, the guide bearing and the support pad assembly are disposed opposite each other within the clearance cavity, and a clamping cavity is formed between them. The clamping cavity is located inside the boss, allowing the upper cavity groove and the lower cavity groove to communicate.

[0032] Specifically, the guide bearing includes a wear-resistant sleeve 8 and a rubber bearing 9 fitted onto the top of the impeller 5's hub, both assembled as a single unit within the clearance cavity. It should be noted that the wear-resistant sleeve 8 on the impeller 5's hub, in conjunction with the rubber bearing 9 inside the guide vane 4, reduces the clearance between the guide vane 4 and the impeller 5, minimizing leakage and ensuring smoother impeller 5 operation. The presence of rubber bearings on each impeller 5 effectively prevents wear, resulting in smoother impeller 5 operation and increased service life.

[0033] Furthermore, the wear-resistant sleeve 8 is made of a metal wear-resistant material, such as a wear-resistant steel sleeve or an alloy sleeve, with a bent portion 12 formed by bending outwards at the bottom. A gap 13 is left between the bent portion 12 and the rubber bearing 9. The gap 13 is used to provide a certain expansion space when the impeller 5 generates heat at high speed, causing the rubber bearing 9 to expand thermally, and the bent portion 12 supports the expanded rubber bearing 9.

[0034] In addition, a second gap cavity 17 is left between the top of the impeller 5 hub and the inner side of the rubber bearing 9 to collect and store the friction powder that appears on the rubber bearing 9 or the wear-resistant sleeve 8 due to high-speed rotation.

[0035] Specifically, the support pad assembly includes a stacked wear-resistant pad assembly 11 and a ceramic ring 10, which are assembled as a single unit within the gap cavity. The ceramic ring 10 is embedded in the guide vane 4 and cooperates with the wear-resistant pad assembly 11 to improve the wear resistance between the bottom of the impeller 5 hub and the guide vane 4.

[0036] Furthermore, the ceramic ring 10 is embedded in the guide vane 4, and a first gap cavity 16 is formed between the inner side of the ceramic ring 10 and the shaft coupling 2, which is used to collect and store the friction powder generated by the wear-resistant pad assembly 11 due to high-speed rotation. In addition, the first gap cavity 16 and the second gap cavity 17 are connected by a clamping cavity, which increases the storage space and allows impurities in both gap cavities to be cleaned at the same time during disassembly and cleaning.

[0037] Specifically, the wear-resistant pad assembly 11 includes wear-resistant pads 14 and wear-resistant washers 15 stacked on top of each other. The wear-resistant pads 14 are thinner than the wear-resistant washers 15. The wear-resistant pads 14 are made of polytetrafluoroethylene (PTFE), and the wear-resistant washers 15 are made of stainless steel.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A submersible pump with a guide bearing structure, the submersible pump comprising a housing and a shaft coupling, the shaft coupling being rotatably connected within the housing; characterized in that: It also includes multiple guide vanes and multiple impellers, which are alternately arranged in sequence in the housing along the axial direction of the shaft coupling. Each guide vane is arranged on the housing, and each impeller is arranged on the shaft coupling. A clearance cavity is provided between each guide vane and the shaft coupling; a guide bearing is provided between the top of the hub of each impeller and the guide vane above it to reduce the connection gap between the hub and the guide vane, and the guide bearing is disposed in the clearance cavity; a support pad assembly is provided between the bottom of the hub of each impeller and the guide vane below it, and the support pad assembly is disposed in the clearance cavity.

2. The submersible pump with a guide bearing structure according to claim 1, characterized in that: The guide bearing and the support pad assembly are arranged opposite each other in the gap cavity, and a clamping cavity is formed between them.

3. A submersible pump with a guide bearing structure according to claim 1 or 2, characterized in that: The guide bearing includes a wear-resistant sleeve and a rubber bearing fitted onto the top of the impeller hub, which are assembled as a single unit within the clearance cavity.

4. A submersible pump with a guide bearing structure according to claim 3, characterized in that: The bottom of the wear-resistant sleeve is bent outward to form a bent portion, which is used to support the rubber bearing; a gap is left between the bent portion and the rubber bearing.

5. A submersible pump with a guide bearing structure according to claim 3, characterized in that: A second clearance cavity is left between the top of the impeller hub and the inner side of the rubber bearing.

6. A submersible pump with a guide bearing structure according to claim 1 or 2, characterized in that: The support pad assembly includes a stacked wear-resistant pad assembly and a ceramic ring, which are assembled as a whole within the gap cavity.

7. A submersible pump with a guide bearing structure according to claim 6, characterized in that: The wear-resistant pad assembly includes wear-resistant pads and wear-resistant washers that are stacked on top of each other.

8. A submersible pump with a guide bearing structure according to claim 7, characterized in that: The thickness of the wear-resistant pad is less than that of the wear-resistant washer.

9. A submersible pump with a guide bearing structure according to claim 6, characterized in that: The ceramic ring is embedded in the guide vane, and a first gap cavity is formed between the inner side of the ceramic ring and the shaft coupling.

10. A submersible pump with a guide bearing structure according to claim 1, characterized in that: The housing includes: Pump sleeve; The outlet shell and the connecting frame are respectively threaded onto the upper and lower ends of the pump sleeve; Multiple bearing housings clamp each of the guide vanes and are confined within the pump sleeve by the outlet casing and the coupling.

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