Pump inlet flow guide structure

Abstract

The utility model relates to the technical field of flow guide structures, in particular to a pump inlet flow guide structure which effectively guides fluid to enter an impeller and reduces turbulent flow and vortex of the fluid at a pump inlet, so that the flowing efficiency and stability of the fluid are improved. Comprising a pump body, the pump body is provided with an input end and an output end, and an impeller is arranged in the pump body; the inlet pipe is arranged at the input end of the pump body in a communicating mode, the multiple groups of flow guide ribs are installed on the inner side wall of the inlet pipe at equal intervals in the circumferential direction, and the number of the multiple groups of flow guide ribs is consistent with that of impeller blades in the pump body.

Description

Technical Field

[0001] This utility model relates to the technical field of flow guiding structures, and in particular to a pump inlet flow guiding structure. Background Technology

[0002] Water pumps are designed with a single performance point, meaning they are designed for a specific rated flow rate. At this design flow rate, they achieve the highest efficiency, allowing the fluid to enter the impeller smoothly without causing impact pressure or velocity on the blade inlet edge.

[0003] However, in actual operation, various complex working conditions may occur. Pumps need to operate at flow rates below the design flow rate and flow rates above the design flow rate. At this time, at the pump inlet, when the flow rate is high, the fluid velocity at the impeller inlet will increase. The increase in velocity will make the fluid more prone to turbulence, causing the fluid to impact the blade inlet edge in an unstable state. When the flow rate is low, the fluid velocity will decrease, causing the velocity direction to change. It will not be able to enter the impeller in the design flow direction, which will also lead to impact on the blade inlet edge. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a pump inlet guide structure that effectively guides fluid into the impeller, reduces turbulence and eddies in the fluid at the pump inlet, thereby improving the flow efficiency and stability of the fluid.

[0005] This utility model discloses a pump inlet flow guiding structure, including a pump body with an input end and an output end, and an impeller disposed within the pump body. It also includes an inlet pipe and multiple sets of guide ribs. The inlet pipe is connected to the input end of the pump body, and the multiple sets of guide ribs are circumferentially and equidistantly installed on the inner sidewall of the inlet pipe, with the number of guide ribs matching the number of impeller blades within the pump body. Fluid enters the pump body through the inlet pipe, and the multiple sets of guide ribs rectify the fluid, allowing it to smoothly enter the impeller, thus achieving the purpose of rectification and reducing the impact velocity and pressure of the fluid on the impeller inlet edge. This allows the pump to maintain a certain level of high efficiency even with excessively large or small flow rates. By designing the number of multiple sets of guide ribs to match the number of impeller blades within the pump body, the fluid can be more effectively guided into the impeller, reducing turbulence and eddies at the pump inlet, thereby improving the fluid flow efficiency and stability.

[0006] Preferably, the multiple sets of guide ribs are inclined at a certain angle inside the inlet pipe, and this angle is the same as the impeller inlet edge and the impeller inlet placement angle. When the inclination angle of the guide ribs is the same as the impeller inlet edge and the impeller inlet placement angle, the fluid can flow more smoothly along the guiding direction of the guide ribs before entering the impeller, reducing the direct impact of the fluid on the pump inlet and the impeller, thereby reducing fluid resistance.

[0007] Preferably, the inclination angle of the guide rib is 21°; the 21° inclination angle can be optimized through fluid dynamics simulation to guide the fluid to enter the impeller more smoothly, reduce the turbulence and eddies of the fluid at the pump inlet, thereby improving the fluid flow efficiency and stability.

[0008] Preferably, the number of the multiple sets of guide ribs is 7; 7 guide ribs can more effectively disperse the pressure borne by the pump body, avoid local stress concentration, and thus improve the overall structural strength of the pump body.

[0009] Preferably, the material of the multiple sets of guide ribs is any one of stainless steel, carbon steel, alloy steel or composite material; this improves the corrosion resistance of the multiple sets of guide ribs and enhances the convenience of use under different working conditions.

[0010] Compared with existing technologies, the beneficial effects of this invention are as follows: Fluid enters the pump body through the inlet pipe, and after being rectified by multiple sets of guide ribs, the liquid smoothly enters the impeller, achieving the purpose of rectification and reducing the impact velocity and pressure of the fluid on the impeller inlet edge. This allows the pump to maintain a certain level of high efficiency even when the actual flow rate is too high or too low. By designing the number of multiple sets of guide ribs to be consistent with the number of impeller blades within the pump body, the fluid can be guided into the impeller more effectively, reducing turbulence and eddies at the pump inlet, thereby improving the fluid flow efficiency and stability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0012] Figure 2 This is a partial isometric structural diagram of the connection between the inlet pipe and the guide ribs, etc.

[0013] Figure 3 This is a partial isometric structural diagram of the connection between the pump body and the inlet pipe, etc.

[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the inlet pipe.

[0015] The attached diagram is labeled as follows: 1. Pump body; 2. Inlet pipe; 3. Guide rib. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1

[0018] like Figures 1 to 4As shown, a pump inlet guide structure of this utility model includes a pump body 1, which is provided with an input end and an output end, and an impeller is provided inside the pump body 1; it also includes an inlet pipe 2 and multiple sets of guide ribs 3, the inlet pipe 2 is connected to the input end of the pump body 1, and the multiple sets of guide ribs 3 are circumferentially and equidistantly installed on the inner side wall of the inlet pipe 2, and the number of multiple sets of guide ribs 3 is consistent with the number of impeller blades inside the pump body 1;

[0019] like Figure 2 As shown, the multiple sets of guide ribs 3 are inclined at a certain angle inside the inlet pipe 2, and this angle is the same as the impeller inlet edge and the impeller inlet placement angle.

[0020] In this embodiment, fluid enters the pump body 1 through the inlet pipe 2. After being rectified by multiple sets of guide ribs 3, the liquid smoothly enters the impeller, achieving the purpose of rectification and reducing the impact velocity and pressure of the fluid on the impeller inlet edge. This allows the pump to maintain a certain level of high efficiency even when the actual flow rate is too high or too low. By designing the number of multiple sets of guide ribs 3 to be consistent with the number of impeller blades inside the pump body 1, the fluid can be guided into the impeller more effectively, reducing turbulence and eddies at the pump inlet, thereby improving the flow efficiency and stability of the fluid.

[0021] Example 2

[0022] Based on Example 1, such as Figure 1 As shown, in a pump inlet guide structure of this utility model, the inclination angle of the guide rib 3 is 21°;

[0023] like Figure 2 As shown, the number of the multiple sets of guide ribs 3 is 7;

[0024] like Figure 4 As shown, the material of the multiple sets of guide ribs 3 is any one of stainless steel, carbon steel, alloy steel or composite material;

[0025] In this embodiment, when the inclination angle of the guide rib 3 is the same as the impeller inlet edge and the impeller inlet placement angle, the fluid can flow more smoothly along the guiding direction of the guide rib 3 before entering the impeller, reducing the direct impact of the fluid on the pump inlet and the impeller, thereby reducing fluid resistance. The 21° inclination angle can be optimized through fluid dynamics simulation to guide the fluid to enter the impeller more smoothly, reducing turbulence and eddies in the fluid at the pump inlet, thereby improving the fluid flow efficiency and stability.

[0026] The present invention provides a pump inlet guide structure in which, during operation, fluid enters the pump body 1 through the inlet pipe 2, and after being rectified by multiple sets of guide ribs 3, the liquid smoothly enters the impeller.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pump inlet guide structure, comprising a pump body (1), the pump body (1) having an input end and an output end, and an impeller disposed within the pump body (1); characterized in that, It also includes an inlet pipe (2) and multiple sets of guide ribs (3). The inlet pipe (2) is connected to the input end of the pump body (1). Multiple sets of guide ribs (3) are circumferentially and equidistantly installed on the inner side wall of the inlet pipe (2). The number of multiple sets of guide ribs (3) is consistent with the number of impeller blades in the pump body (1).

2. The pump inlet guide structure as described in claim 1, characterized in that, The multiple sets of guide ribs (3) are inclined at a certain angle inside the inlet pipe (2), and this angle is the same as the impeller inlet edge and the impeller inlet placement angle.

3. The pump inlet guide structure as described in claim 2, characterized in that, The inclination angle of the guide rib (3) is 21°.

4. The pump inlet flow guiding structure as described in claim 1, characterized in that, The number of the multiple sets of guide ribs (3) is 7.

5. The pump inlet guide structure as described in claim 1, characterized in that, The material of the multiple sets of guide ribs (3) is any one of stainless steel, carbon steel, alloy steel or composite material.

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