A protection device for a guide vane body of an axial flow pump

Abstract

The utility model discloses an axial -flow pump guide vane body protection device relates to axial -flow pump guide vane body technical field. The device includes axial -flow pump guide vane body and wear -resistant cover, and wear -resistant cover has the protection effect to guide vane body, prevents guide vane body and prematurely wears out failure. Wherein guide vane body and wear -resistant cover are fixedly connected through screw, and the below of guide vane body is installed with submersible pump casing, and this submersible pump casing also is connected with guide vane body through screw. Impeller fixedly set up at submersible pump casing top, and rotate in wear -resistant cover, and the wear -resistant cover of polyurethane material has excellent wear resistance to the fluid containing solid particle, and through the wear -resistant cover of polyurethane material of additional installation in guide vane body inside, its inner wall completely covers the working area of impeller, directly bears the fluid scouring and wear and tear that impeller rotates brought, and the wear that originally acts on guide vane body is transferred to wear -resistant cover, thereby effectively protects guide vane body ontology from wearing and tearing damage.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump guide vane technology, specifically a protective device for the axial flow pump guide vane of a submersible pump. Background Technology

[0002] Submersible pumps, as an important fluid transport device, are widely used in fire emergency response, urban drainage, agricultural irrigation, industrial cooling, domestic water supply and fountain landscapes due to their small size, light weight and ability to be completely immersed in liquid.

[0003] When the impeller, the core working component of a submersible pump, rotates at high speed, the outflowing liquid impacts and abrades the guide vanes. Because submersible pumps operate for extended periods in environments that may contain abrasive media such as silt and impurities, the inner wall of the guide vanes is highly susceptible to continuous erosion and wear. As a crucial component for guiding and stabilizing liquid flow, wear on the guide vanes not only reduces the pump's hydraulic efficiency but can also lead to perforation or structural damage, necessitating complete replacement. This not only increases maintenance costs but also affects the equipment's lifespan and operational reliability.

[0004] In existing technologies, guide vane bodies are typically integral structures made of a single material, and their inner walls directly bear the erosion and wear of high-speed fluids containing solid particles. When the wear reaches a certain level, the entire guide vane body component must be replaced, which is costly and inconvenient. To address this technical challenge of guide vane body wear, there is an urgent need for a solution that effectively protects the guide vane body, is easy to replace, and reduces maintenance costs. To address these issues, the inventors propose a guide vane body protection device. Utility Model Content

[0005] To address the problem of short guide vane life and high maintenance costs caused by high-speed impeller rotation during underwater operation of existing submersible pumps, the purpose of this utility model is to provide a guide vane protection device for axial flow pumps.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a protective device for the guide vane of an axial flow pump.

[0007] The axial flow pump guide vane protection device includes a guide vane body and a wear-resistant sleeve. A wear-resistant sleeve made of lightweight and highly wear-resistant material is installed between the impeller chamber wall of the axial flow pump guide vane body and the impeller.

[0008] The guide vane body and the wear-resistant sleeve are detachably connected by fasteners (such as screws).

[0009] The guide vane is also used to connect and fix it to the submersible pump housing by fasteners (such as screws).

[0010] An impeller is fixedly installed at the output end of the submersible pump housing. The working area of ​​the impeller extends into the interior of the wear-resistant sleeve and rotates relative to the wear-resistant sleeve.

[0011] The inner wall height of the wear-resistant sleeve is configured such that, after the guide vane body, wear-resistant sleeve, and submersible pump housing are assembled, its inner wall completely covers the working range of the impeller, isolating the interior of the guide vane body from the impeller rotation area.

[0012] Preferably, the lightweight and highly wear-resistant material is polyurethane (PU).

[0013] Preferably, the bottom end of the wear-resistant sleeve is provided with a first positioning structure (e.g., a stop), and the corresponding position of the submersible pump housing is provided with a matching second positioning structure (e.g., a boss or a groove). When the assembly formed by connecting the guide vane body and the wear-resistant sleeve is installed onto the submersible pump housing, the first positioning structure and the second positioning structure cooperate with each other to ensure the coaxiality of the wear-resistant sleeve and the submersible pump housing.

[0014] Preferably, the wear-resistant sleeve is a split type, that is, the part of the wear-resistant sleeve that mates with the impeller is made of a lightweight wear-resistant material, while other parts can be made of other materials to improve the rigidity of the wear-resistant sleeve.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Effective protection: The wear-resistant sleeve made of polyurethane material has excellent wear resistance to fluids containing solid particles. By installing the wear-resistant sleeve made of polyurethane material inside the guide vane body, its inner wall completely covers the working area of ​​the impeller and directly bears the fluid scouring and wear caused by the rotation of the impeller. It transfers the wear that originally acted on the guide vane body to the wear-resistant sleeve, thereby effectively protecting the guide vane body from wear damage.

[0017] 2. Convenient maintenance and low cost: The wear-resistant sleeve is designed as an independent replaceable component. When the wear-resistant sleeve reaches its life limit due to long-term wear, it can be replaced individually by simply disassembling the connecting fasteners, without having to replace the entire guide vane assembly, which significantly reduces maintenance difficulty and spare parts costs;

[0018] 3. Improve overall performance: The wear-resistant sleeve is made of lightweight wear-resistant material, which not only ensures wear resistance and reduces the overall weight of the device, but also indirectly improves the working life of the submersible pump. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] In the diagram: 1. Guide vane; 2. Impeller; 3. Wear-resistant sleeve; 4. Submersible pump casing. Detailed Implementation

[0022] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Figure 1 As shown, this utility model provides a guide vane protection device, which mainly includes a guide vane 1, a wear-resistant sleeve 3, a submersible pump housing 4, and an impeller 2 fixed to the output end of the submersible pump housing 4.

[0024] Structural assembly:

[0025] The bottom of the guide vane body 1 preferably has 16 threaded connection holes. Correspondingly, the wear-resistant sleeve 3 preferably has 16 threaded connection holes whose positions and sizes match the holes on the guide vane body 1. The wear-resistant sleeve 3 is detachably and fixedly installed below the guide vane body 1 by passing connecting screws through 8 of these holes (for example, a set of holes selected at intervals).

[0026] The submersible pump housing 4 is located below the assembly consisting of the guide vane body 1 and the wear-resistant sleeve 3. The guide vane body 1 is fixedly connected to the submersible pump housing 4 by connecting screws passing through the remaining 8 holes. After installation, the wear-resistant sleeve 3 is located between the guide vane body 1 and the submersible pump housing 4.

[0027] The impeller 2 is fixedly mounted on the output shaft (i.e., the output end) of the submersible pump housing 4, and its working area extends completely into the internal cavity of the wear-resistant sleeve 3, allowing it to rotate freely within the wear-resistant sleeve 3. The bottom end of the wear-resistant sleeve 3 has a downward-extending positioning stop, and the top surface of the submersible pump housing 4 has a positioning groove (or boss) that precisely matches it. When the component is installed onto the submersible pump housing 4, the stop and the groove (or boss) fit tightly, effectively ensuring the coaxiality of the wear-resistant sleeve 3 and the submersible pump housing 4.

[0028] Key features and functions:

[0029] The wear-resistant sleeve 3 is preferably made of high-performance lightweight wear-resistant materials (such as silicon carbide ceramic composites, reinforced polymers, polyurethane organic polymers, etc.), which have both excellent wear resistance and weight reduction effect.

[0030] The key is that after the guide vane body 1, wear-resistant sleeve 3, and submersible pump housing 4 are assembled, the inner wall height of the wear-resistant sleeve 3 is precisely designed to completely cover and exceed the entire working stroke of the impeller 2 (i.e., the maximum axial range swept by the blade rotation). This means that when the impeller 2 rotates at high speed, its blades only contact the inner wall of the wear-resistant sleeve 3 and generate frictional wear, while the body of the guide vane body 1 is effectively isolated and protected by the wear-resistant sleeve 3 from direct wear.

[0031] Replacement operation:

[0032] When the submersible pump operates in an abrasive environment for a long time, causing the inner wall of the wear-resistant sleeve 3 to wear to the limit of its design life, simply replace it by following these steps:

[0033] Remove the screws connecting the guide vane body 1 and the submersible pump housing 4;

[0034] Remove the guide vane body 1-wear-resistant sleeve 3 assembly from the submersible pump housing 4;

[0035] Remove the screws connecting the guide vane body 1 and the worn wear-resistant sleeve 3;

[0036] Remove the worn wear-resistant sleeve 3;

[0037] Install the new wear-resistant sleeve 3 onto the guide vane body 1 using screws;

[0038] Reinstall the guide vane body 1-new wear-resistant sleeve 3 assembly back onto the submersible pump housing 4 using screws, and ensure that the positioning stop and the groove (or boss) are properly engaged.

[0039] Thanks to this detachable design, only the lightweight wear-resistant sleeve 3 needs to be replaced, avoiding the need to replace the entire expensive and bulky guide vane assembly 1.

[0040] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for an axial flow pump guide vane, comprising an axial flow pump guide vane (1) and a wear-resistant sleeve (3), characterized in that: A wear-resistant sleeve (3) containing lightweight and highly wear-resistant material is provided between the impeller chamber wall of the guide vane body (1) of the axial flow pump and the impeller (2).

2. The guide vane protection device according to claim 1, characterized in that: The lightweight and highly wear-resistant material is polyurethane (PU).

3. The guide vane protection device according to claim 1, characterized in that: The bottom end of the guide vane (1) and the wear-resistant sleeve (3) are provided with a number of connection holes; The guide vane body (1) and the wear-resistant sleeve (3) are fixedly connected by fasteners passing through the connection hole; The guide vane (1) is also used to connect to the submersible pump housing (4) by fasteners; An impeller (2) is fixedly provided at the output end of the submersible pump housing (4), and the impeller (2) extends into the wear-resistant sleeve (3) and rotates relative to it; The inner wall height of the wear-resistant sleeve (3) is configured such that when the guide vane (1), the wear-resistant sleeve (3) and the submersible pump housing (4) are assembled, they completely cover the working range of the impeller (2).

4. The guide vane protection device according to claim 3, characterized in that: The bottom of the wear-resistant sleeve (3) is provided with a first positioning structure, and the submersible pump housing (4) is provided with a corresponding second positioning structure. When the component formed by connecting the wear-resistant sleeve (3) and the guide vane (1) is installed on the submersible pump housing (4), the first positioning structure and the second positioning structure cooperate to ensure the coaxiality of the wear-resistant sleeve (3) and the submersible pump housing (4).

5. The guide vane protection device according to claim 4, characterized in that: The wear-resistant sleeve (3) is a split type, that is, the wear-resistant sleeve and the impeller corresponding part are made of lightweight wear-resistant material, while other parts can be made of other materials to improve the rigidity of the wear-resistant sleeve.

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