A water pump with a compensation structure

Abstract

This utility model relates to a water pump with a compensation structure, solving the problem of reduced hydraulic performance caused by the deformation of the guide component in existing technologies, which leads to rotational slippage. The technical solution includes a pump casing and a multi-stage impeller assembly stacked sequentially within the casing. Each impeller assembly includes an impeller and a guide component. The key feature is the compensation structure within the pump casing, which is under axial compression and has axial deformation. This structure ensures that the guide component is subjected to axial compression and maintains a non-rotating fit with the pump casing. The effect is that by adding a compensation structure to the pump body, and ensuring that the compensation structure is under axial compression and has axial deformation to compensate for the deformation of the guide component, the guide component is always subjected to axial compression and maintains a non-rotating fit with the pump casing, thus helping the pump maintain stable hydraulic performance.

Description

Technical Field

[0001] This utility model relates to the field of water pumps, and in particular to a water pump with a compensation structure. Background Technology

[0002] In existing multistage pump structures (especially well pumps), to ensure the hydraulic performance of the multistage pump, there needs to be an interaction pressure between the guide components to prevent them from spinning. However, under long-term stress, the guide components may deform. When the guide components deform, the interaction force between them decreases, making them more prone to spinning, thus affecting the hydraulic performance of the multistage pump. Summary of the Invention

[0003] The purpose of this utility model is to solve the above-mentioned problems existing in the prior art and provide a water pump with a compensation structure. The compensation structure is added to the pump body and is axially compressed in the water pump. It has axial deformation and is used to compensate for the deformation of the flow guiding component, so that the flow guiding component is always subjected to axial extrusion force and always maintains a non-rotation fit with the pump casing.

[0004] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a water pump with a compensation structure, including a pump casing, and a multi-stage impeller assembly arranged in sequence within the pump casing, each stage of the impeller assembly including an impeller and a flow guide component, characterized in that the pump casing is provided with a compensation structure, the compensation structure being in an axial compression state and having an axial deformation, used to make the flow guide component subject to axial compression and maintain anti-rotation cooperation with the pump casing.

[0005] The main difference between this technical solution and the prior art is that a compensation structure is added to the pump body, and the compensation structure is installed in the water pump in an axial compression state, with axial deformation, which is used to compensate for the deformation of the flow guiding component, so that the flow guiding component is always subjected to axial extrusion force and always maintains an anti-rotation fit with the pump casing.

[0006] The axial deformation of the compensation structure includes axial displacement and axial restoring force.

[0007] Furthermore, the compensation structure can directly cooperate with the flow guiding component, and the axial deformation of the compensation structure can directly act on the flow guiding component. Alternatively, the compensation structure can indirectly transfer the axial deformation to the flow guiding component through other components, so that the flow guiding component can always be subjected to axial compression and always maintain an anti-rotation fit with the pump housing.

[0008] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

[0009] Preferably, both ends of the pump casing are provided with fixing members and support members provided at the inner ends of the fixing members. The fixing members are used to limit the axial displacement of the impeller assembly, and the support members are used to transmit axial force to the impeller assembly. The compensation structure is provided between the mutually cooperating fixing members and support members and / or between the impeller assembly.

[0010] When the compensation structure is disposed between the mutually cooperating fixing member and the support member, the compensation structure transmits the axial deformation on the compensation structure to the guide member through the support member.

[0011] When the compensation structure is disposed between the impeller assemblies, the axial deformation of the compensation structure directly acts on the guide component.

[0012] Preferably, the axial deformation of the compensation structure is greater than the sum of the maximum axial deformations of each of the flow guiding components.

[0013] When there is one set of compensation structures, the axial deformation of the set of compensation structures is greater than the sum of the maximum deformations of each of the flow guiding components. When there are two or more sets of compensation structures, the total axial deformation of the sets of compensation structures is greater than the sum of the maximum deformations of each of the flow guiding components.

[0014] Preferably, the compensation structure includes at least one compensation unit. When there are two or more compensation units, the compensation units are stacked axially. That is, regardless of whether the compensation structure includes one or more compensation units, the compensation structure always has axial deformation, which is formed by one or more compensation units.

[0015] Preferably, the compensation unit is an axially compressible elastic body, and the outer wall of the compensation unit mates with the inner wall of the pump housing.

[0016] Preferably, the compensation unit is at least one of disc spring, wave spring, helical spring, and rubber.

[0017] Preferably, when the compensation unit is a disc spring, each compensation unit is composed of 1 to 5 disc springs stacked together.

[0018] Preferably, when there are two or more compensation units, adjacent compensation units are stacked in an axial mirror image.

[0019] Preferably, the compensation unit is externally encased in a rubber sleeve, the outer wall of which mates with the inner wall of the pump casing. When the compensation structure is compressed within the pump casing, the outer wall of the compensation structure expands radially outward, tightly adhering to the inner wall of the pump casing, forming a sealed fit. This helps prevent liquid inside the pump body from leaking outward along the inner wall of the pump casing and also helps protect the hydraulic performance of the pump.

[0020] Preferably, the flow guiding component is a guide vane or a flow guiding shell.

[0021] The beneficial effects of this utility model are as follows: 1. A compensation structure is added to the pump body, and the compensation structure is assembled in the water pump under axial compression, having axial deformation, which is used to compensate for the deformation of the guide component, so that the guide component is always subjected to axial compression and always maintains an anti-rotation fit with the pump casing. 2. The compensation structure can directly cooperate with the guide component, and the axial deformation of the compensation structure directly acts on the guide component, or the compensation structure indirectly transmits the axial deformation to the guide component through other components (such as support components), so that the guide component can always be subjected to axial compression and always maintain an anti-rotation fit with the pump casing. 3. The compensation unit is wrapped with a rubber sleeve. Due to the pressure assembly of the compensation structure, the outer wall of the compensation structure expands radially outward, so that the rubber sleeve is tightly attached to the inner wall of the pump casing, thereby forming a sealing fit, which helps to prevent the liquid in the pump body from leaking outward along the inner wall of the pump casing, and also helps to protect the hydraulic performance of the water pump. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 yes Figure 1 A schematic diagram of a partially enlarged structure.

[0024] Figure 3 This is a schematic diagram of a compensation structure in which the compensation unit is a disc spring.

[0025] In the diagram: 1. Pump casing; 2. Impeller; 3. Flow guide component; 4. Compensation structure; 5. Fixing component; 6. Support component; 7. Compensation unit; 8. Rubber sleeve. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In the description of the drawings, the compensation unit is illustrated using a disc spring as an example. For wave springs, helical springs, and rubber, those skilled in the art can implement this technical solution based on the teachings herein. To avoid redundancy, the corresponding schematic diagrams are omitted.

[0027] Example: Figures 1-3 As shown, a water pump with a compensation structure includes a pump casing 1 and a multi-stage impeller assembly stacked sequentially within the pump casing 1. Each impeller assembly includes an impeller 2 and a flow guide 3. The pump casing 1 is provided with a compensation structure 4, which is in an axial compression state and has an axial deformation, used to make the flow guide 3 subject to axial compression and maintain an anti-rotation fit with the pump casing 1.

[0028] The main difference between this technical solution and the prior art is that a compensation structure 4 is added to the pump body, and the compensation structure 4 is installed in the water pump in an axial compression state and has axial deformation, which is used to compensate for the deformation of the guide component 3, so that the guide component 3 is always subjected to axial extrusion force and always maintains anti-rotation fit with the pump casing 1.

[0029] Among them, the axial deformation of the compensation structure 4 includes axial displacement and axial restoring force.

[0030] Furthermore, the compensation structure 4 can directly cooperate with the flow guide component 3, and the axial deformation of the compensation structure 4 can directly act on the flow guide component 3. Alternatively, the compensation structure 4 can indirectly transmit the axial deformation to the flow guide component 3 through other components, so that the flow guide component 3 can always be subjected to axial compression and always maintain an anti-rotation fit with the pump housing 1.

[0031] In practical applications, the flow guiding component 3 is a guide vane or a flow guiding shell.

[0032] Next, the above technical solution will be further explained in detail:

[0033] In practical applications, the compensation structure 4 includes at least one compensation unit 7. When there are two or more compensation units 7, the compensation units 7 are stacked axially. That is, regardless of whether the compensation structure 4 includes one or more compensation units 7, the compensation structure 4 always has axial deformation, which is formed by one or more compensation units 7.

[0034] In practical applications, the compensation unit 7 is an axially compressible elastic body, and the outer wall of the compensation unit 7 is fitted with the inner wall of the pump housing 1.

[0035] In practical applications, the compensation unit 7 is externally wrapped with a rubber sleeve 8. The outer wall of the rubber sleeve 8 mates with the inner wall of the pump casing 1. When the compensation structure 4 is compressed and installed inside the pump casing 1, the outer wall of the compensation structure 4 expands radially outward and closely adheres to the inner wall of the pump casing 1, forming a sealed fit. This helps prevent liquid in the pump body from leaking outward along the inner wall of the pump casing 1 and also helps protect the hydraulic performance of the pump.

[0036] In practical applications, both ends of the pump casing 1 are provided with fixing members 5 and support members 6 provided at the inner end of the fixing members 5. The fixing members 5 are used to limit the axial displacement of the impeller assembly, and the support members 6 are used to transmit axial force to the impeller assembly. The compensation structure 4 is provided between the mutually cooperating fixing members 5 and support members 6 and / or between the impeller assembly.

[0037] In other words, the compensation structure 4 is located at one end near the pump casing 1; or, the compensation structure 4 is located at both ends near the pump casing 1; or, the compensation structure 4 is located between the impeller assemblies; or, the compensation structure 4 is located between the impeller assemblies, and also at one or both ends near the pump casing 1. Specifically, it depends on the length of the water pump. When the water pump is long, the compensation structure 4 needs to be located near both ends of the pump casing 1, and multiple sets of spaced compensation structures 4 can also be located between the impeller assemblies.

[0038] When the compensation structure 4 is disposed between the mutually cooperating fixing member 5 and the supporting member 6, the compensation structure 4 transmits the axial deformation on the compensation structure 4 to the flow guiding member 3 through the supporting member 6.

[0039] When the compensation structure 4 is disposed between the impeller assemblies, the axial deformation of the compensation structure 4 directly acts on the guide component 3.

[0040] In this embodiment, the fixing members 5 are the water outlet section and water inlet section set at both ends of the pump casing 1, and the support member 6 is embodied in the form of a support base.

[0041] In practical applications, the axial deformation of the compensation structure 4 is greater than the sum of the maximum axial deformations of each of the flow guiding components 3.

[0042] When the compensation structure 4 is in a group, the axial deformation of the group of compensation structures 4 is greater than the sum of the maximum deformations of each of the flow guiding components 3. When there are two or more groups of compensation structures 4, the total axial deformation of the group of compensation structures 4 is greater than the sum of the maximum deformations of each of the flow guiding components 3.

[0043] In practical applications, the compensation unit 7 is at least one of a disc spring, wave spring, coil spring, and rubber. A single disc spring, wave spring, coil spring, or rubber can be selected. Alternatively, two or more elastomers can be selected in combination.

[0044] In practical applications, when the compensation unit 7 is a disc spring, each compensation unit 7 is composed of 1 to 5 disc springs stacked together. In this embodiment, each compensation unit 7 is composed of two, three, or four disc springs stacked together.

[0045] In practical applications, when there are two or more compensation units 7, adjacent compensation units 7 are stacked in an axially mirror image. In this embodiment, the compensation units 7 are preferably two, three, or four, and adjacent compensation units 7 are all stacked in an axially mirror image.

[0046] like Figure 2 As shown, there are two compensation units 7, and each compensation unit 7 is composed of three disc springs stacked together.

[0047] like Figure 3 As shown, there are four compensation units 7, and each compensation unit 7 is composed of two disc springs stacked together.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water pump with a compensation structure, comprising a pump casing (1), and a multi-stage impeller assembly arranged sequentially within the pump casing (1), each stage of the impeller assembly comprising an impeller (2) and a flow guiding component (3), characterized in that... The pump casing (1) is provided with a compensation structure (4), which is in an axial compression state and has an axial deformation, so that the flow guide component (3) is subjected to axial compression and maintains a non-rotation fit with the pump casing (1).

2. The water pump having a compensation structure according to claim 1, characterized by Both ends of the pump casing (1) are provided with a fixing member (5) and a support member (6) provided at the inner end of the fixing member (5). The fixing member (5) is used to limit the axial displacement of the impeller assembly, and the support member (6) is used to transmit axial force to the impeller assembly. The compensation structure (4) is provided between the fixing member (5) and the support member (6) and / or between the impeller assembly.

3. The water pump with a compensating structure according to claim 1 or 2, characterized in that The axial deformation of the compensation structure (4) is greater than the sum of the maximum axial deformations of each of the flow guiding components (3).

4. The water pump with a compensating structure according to claim 1 or 2, characterized in that The compensation structure (4) includes at least one compensation unit (7). When there are two or more compensation units (7), the compensation units (7) are stacked axially.

5. The water pump having a compensating structure according to claim 4, characterized by The compensation unit (7) is an axially compressible elastic body, and the outer wall of the compensation unit (7) is fitted with the inner wall of the pump housing (1).

6. The water pump having a compensation structure according to claim 5, characterized by The compensation unit (7) is at least one of disc spring, wave spring, helical spring, and rubber.

7. The water pump with a compensation structure according to claim 6, characterized in that... When the compensation unit (7) is a disc spring, each compensation unit (7) is composed of 1 to 5 disc springs stacked together.

8. The water pump having a compensating structure according to claim 7, characterized by When there are two or more compensation units (7), adjacent compensation units (7) are stacked in an axial mirror image.

9. The water pump having a compensation structure according to claim 4, characterized by The compensation unit (7) is wrapped with a rubber sleeve (8). The outer side wall of the rubber sleeve (8) is fitted with the inner wall of the pump housing (1). When the compensation structure (4) is compressed and placed inside the pump housing (1), the outer side wall of the compensation structure (4) expands radially outward and closely adheres to the inner wall of the pump housing (1) to form a sealed fit.

10. The water pump having a compensating structure according to claim 1 or 2, characterized by The flow guiding component (3) is a guide vane or a flow guiding shell.

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