Efficient and energy-saving horizontal centrifugal pump

Abstract

The utility model provides an efficient and energy-saving horizontal centrifugal pump which comprises a pump body, the pump body is provided with a suction inlet, a discharge outlet and a volute chamber, and the volute chamber is communicated with the suction inlet and the discharge outlet; the impeller is arranged in the volute chamber, the impeller comprises a plurality of blades, the tail ends of the blades are provided with blade outlet edges, and the blade outlet edges are obliquely arranged; the efficient and energy-saving horizontal centrifugal pump is provided with a transverse section in the length direction of a pump body. On the transverse section, the perpendicular bisector of the volute chamber is defined as a first perpendicular bisector, the center line of the discharge port is defined as a second perpendicular bisector, and the center line of the impeller blade outlet is defined as a third perpendicular bisector; the second perpendicular bisector coincides with the third perpendicular bisector, and the first perpendicular bisector deviates towards the suction inlet relative to the second perpendicular bisector. The outlet edge of the blade is innovatively designed to be inclined, and the volute chamber deviates towards the suction inlet, so that fluid is better guided, flow separation and vortexes at the outlet are reduced, hydraulic loss is reduced, hydraulic efficiency is improved, and lift and stability are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of pumps, specifically relating to a high-efficiency and energy-saving horizontal centrifugal pump. Background Technology

[0002] With the rapid development of industrial civilization, horizontal centrifugal pumps are needed for central air conditioning cooling systems, water plant water supply, fire protection, pipeline pressurization, swimming pool water supply, fountain water supply, and high-rise building water supply. The applicant's CN217652914U, filed in 2022, describes a horizontal single-stage pump, which is a horizontal centrifugal pump. Its motor drives the impeller to rotate via the motor shaft and pump shaft, thus achieving the pumping function. The impeller design follows existing technology, with the blade outlet edge (i.e., the tail end 60) shaped like... Figure 1 The straight line settings are shown.

[0003] In order to make the product more competitive in the market, the applicant and inventors found that the hydraulic efficiency, head and stability of the horizontal centrifugal pump with the above structure need to be improved during use, and can be included in the product optimization project. Utility Model Content

[0004] In order to overcome the above-mentioned technical defects, this utility model provides a high-efficiency and energy-saving horizontal centrifugal pump, which can solve the technical problems of insufficient hydraulic efficiency, head and stability of existing horizontal centrifugal pumps.

[0005] This utility model is implemented according to the following technical solution:

[0006] This utility model provides a high-efficiency and energy-saving horizontal centrifugal pump, which includes:

[0007] The pump body has an inlet, an outlet, and a vortex chamber, the vortex chamber being connected to the inlet and the outlet;

[0008] An impeller is disposed in the vortex chamber. The impeller includes multiple blades, and the tail end of each blade is provided with a blade outlet edge, which is inclined.

[0009] The high-efficiency and energy-saving horizontal centrifugal pump has a transverse section along the length of the pump body; on the transverse section, the perpendicular bisector of the vortex chamber is defined as the first perpendicular bisector, the center line of the discharge outlet is defined as the second perpendicular bisector, and the center line of the impeller blade outlet is defined as the third perpendicular bisector.

[0010] The second perpendicular line coincides with the third perpendicular line, and the first perpendicular line is offset relative to the second perpendicular line towards the inlet.

[0011] This application abandons the straight blade outlet edge design in the prior art and innovatively designs the blade outlet edge as inclined. Combined with the offset of the vortex chamber towards the inlet, it better guides the fluid, reduces flow separation and vortex at the outlet, reduces hydraulic loss, improves hydraulic efficiency, and increases head and stability.

[0012] In one embodiment, the vortex chamber is connected to the outlet via a vortex chamber diffuser.

[0013] In one embodiment, the impeller further includes an impeller front cover plate and an impeller rear cover plate, and a plurality of the blades are disposed between the impeller front cover plate and the impeller rear cover plate;

[0014] The blade outlet edge is provided with a first end connected to the impeller rear cover plate and a second end connected to the impeller front cover plate, and the blade outlet edge is inclined from the first end to the second end.

[0015] In one embodiment, the blade has a first end face facing the outside of the impeller and a second end face facing the inside of the impeller;

[0016] The blade outlet edge is inclined from the first end to the second end and bent toward the first end face.

[0017] In one embodiment, the rear side of the impeller rear cover plate is provided with a plurality of secondary blades, which are arranged in a circumferential distribution.

[0018] In one embodiment, the secondary blade includes a front end and a rear end, the front end being connected to the rear side of the impeller rear cover plate;

[0019] The rear ends of all of the sub-blades are on the same plane.

[0020] In one embodiment, the tilt angle β2 of the blade exit edge and the offset distance ΔS of the vortex chamber satisfy the following formula:

[0021]

[0022] Where k is a structural coefficient adjusted according to the pump specific speed, and the range of k is 0.1 to 0.3, and D2 is the impeller diameter. Attached Figure Description

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 A schematic diagram of an impeller in the prior art;

[0025] Figure 2This is a schematic diagram of the high-efficiency and energy-saving horizontal centrifugal pump of this utility model;

[0026] Figure 3 This is a partial schematic diagram of the high-efficiency and energy-saving horizontal centrifugal pump of this utility model (impeller omitted);

[0027] Figure 4 This is a partial schematic diagram of the high-efficiency and energy-saving horizontal centrifugal pump of this utility model;

[0028] Figure 5 This is one of the perspective views of the impeller of this utility model;

[0029] Figure 6 This is a second perspective view of the impeller of this utility model;

[0030] Figure 7 This is a front view of the impeller of this utility model. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] To better illustrate this utility model, a further detailed description of this utility model is provided below with reference to the accompanying drawings.

[0033] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0034] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] Combination Figures 2 to 7 As shown, this utility model provides a high-efficiency and energy-saving horizontal centrifugal pump, which includes: a pump body 10, which has a suction port 110, a discharge port 120 and a vortex chamber 130, wherein the vortex chamber 130 is connected to the suction port 110 and the discharge port 120; an impeller 20, which is disposed in the vortex chamber 130, wherein the impeller 20 includes a plurality of blades 230, and the tail end of the blades 230 is provided with a blade outlet edge 231, wherein the blade outlet edge 231 is inclined.

[0038] Specifically, the impeller 20 is assembled inside the vortex chamber 130. When the horizontal centrifugal pump is working, fluid enters the vortex chamber 130 from the suction port 110. When the motor is powered on, it drives the impeller 20 to rotate through the motor shaft and the pump shaft. The fluid in the inlet 110 of the vortex chamber 130 flows through the impeller inlet of the impeller 20 and enters the interior of the impeller 20 under the action of the rotation of the impeller 20. Then it is thrown out from the blade 230 outlet to the discharge port 120 and finally discharged from the horizontal centrifugal pump of this application.

[0039] The blade outlet edge 231 is inclined. Compared with the straight design of the prior art, the inclined design of this application can better guide the fluid at the blade outlet 230, so that the fluid flows out at an angle, reducing flow separation and eddies at the blade outlet 230 and reducing hydraulic loss. Moreover, the inclined design makes the velocity distribution of the fluid at the blade outlet 230 more uniform, improving energy conversion efficiency and thus increasing the head.

[0040] Furthermore, the high-efficiency and energy-saving horizontal centrifugal pump has a transverse section along the length of the pump body 10. For ease of understanding, on the transverse section, the perpendicular bisector of the vortex chamber 130 is defined as the first perpendicular bisector L1, the centerline of the discharge port 120 is defined as the second perpendicular bisector L2, and the centerline of the outlet of the impeller 20 blade 230 is defined as the third perpendicular bisector L3. The second perpendicular bisector L2 coincides with the third perpendicular bisector L3, and the first perpendicular bisector L1 is offset relative to the second perpendicular bisector L2 towards the suction port 110. That is, the vortex chamber 130 is offset towards the suction port 110.

[0041] Because the vortex chamber 130 is offset towards the suction port 110, the flow field distribution is optimized, making the fluid flow smoother, reducing flow resistance, increasing flow rate, and reducing energy loss. Furthermore, the inclined arrangement of the blade outlet edge 231, combined with the offset of the vortex chamber 130 towards the suction port 110, reduces the impact of the fluid on the pump body 10 (pump casing), reduces vibration and noise, reduces wear, improves operational stability, extends equipment life, and significantly improves the overall performance of the horizontal centrifugal pump, which has broad application prospects.

[0042] In this embodiment, the vortex chamber 130 is connected to the outlet 120 via the vortex chamber diffuser 30, and the fluid discharged from the blade 230 outlet flows to the outlet 120 via the vortex chamber diffuser 30. This embodiment changes the position of the vortex chamber 130, while the positions of the outlet 120 and the inlet 110 remain unchanged, allowing for compatibility with other existing equipment and components.

[0043] Regarding the structure of the impeller 20 in this embodiment, the impeller 20 further includes a front cover plate 210 and a rear cover plate 220, and a plurality of blades 230 are disposed between the front cover plate 210 and the rear cover plate 220. The blade outlet edge 231 is provided with a first end connected to the rear cover plate 220 and a second end connected to the front cover plate 210. The blade outlet edge 231 is inclined from the first end to the second end so that the fluid flows out obliquely, reducing flow separation and eddies at the outlet of the blade 230 and improving hydraulic efficiency.

[0044] Furthermore, the blade 230 is provided with a first end face 232 facing the outside of the impeller 20 and a second end face 233 facing the inside of the impeller 20; the blade outlet edge 231 is inclined from the first end to the second end and is bent towards the first end face 232.

[0045] In this embodiment, a plurality of secondary blades 240 are provided on the rear side of the impeller rear cover plate 220. The plurality of secondary blades 240 are arranged in a circumferential manner to balance the axial force. Further, each secondary blade 240 includes a front end and a rear end, the front end being connected to the rear side of the impeller rear cover plate 220; the rear ends of the plurality of secondary blades 240 are all on the same plane.

[0046] In one embodiment, the tilt angle β2 of the blade exit edge and the offset distance ΔS of the vortex chamber satisfy the following formula:

[0047]

[0048] Where k is a structural coefficient adjusted according to the pump specific speed, and the range of k is 0.1 to 0.3, and D2 is the impeller diameter.

[0049] In one embodiment, for some horizontal centrifugal pumps with small impeller diameters, the offset distance ΔS of the vortex chamber is 0.1 to 0.5 mm.

[0050] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A high-efficiency and energy-saving horizontal centrifugal pump, characterized in that, include: The pump body has an inlet, an outlet, and a vortex chamber, the vortex chamber being connected to the inlet and the outlet; An impeller is disposed in the vortex chamber. The impeller includes multiple blades, and the tail end of each blade is provided with a blade outlet edge, which is inclined. The high-efficiency and energy-saving horizontal centrifugal pump has a transverse section along the length of the pump body; on the transverse section, the perpendicular bisector of the vortex chamber is defined as the first perpendicular bisector, the center line of the discharge outlet is defined as the second perpendicular bisector, and the center line of the impeller blade outlet is defined as the third perpendicular bisector; the second perpendicular bisector coincides with the third perpendicular bisector. The first vertical line is offset relative to the second vertical line towards the inlet, that is, the vortex chamber is positioned towards the inlet.

2. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 1, characterized in that: The vortex chamber is connected to the outlet via a vortex chamber diffuser tube.

3. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 1, characterized in that: The impeller also includes an impeller front cover plate and an impeller rear cover plate, and a plurality of the blades are disposed between the impeller front cover plate and the impeller rear cover plate; The blade outlet edge is provided with a first end connected to the impeller rear cover plate and a second end connected to the impeller front cover plate, and the blade outlet edge is inclined from the first end to the second end.

4. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 3, characterized in that: The blade has a first end face facing the outside of the impeller and a second end face facing the inside of the impeller; The blade outlet edge is inclined from the first end to the second end and bent toward the first end face.

5. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 3, characterized in that: The rear side of the impeller rear cover plate is provided with multiple auxiliary blades, which are arranged in a circumferential pattern.

6. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 5, characterized in that: The auxiliary blade includes a front end and a rear end, and the front end is connected to the rear side of the impeller rear cover plate; The rear ends of all of the sub-blades are on the same plane.

7. The high-efficiency and energy-saving horizontal centrifugal pump according to claim 1, characterized in that: The tilt angle β2 of the blade exit edge and the offset distance ΔS of the vortex chamber satisfy the following formula: Where k is a structural coefficient adjusted according to the pump specific speed, and the range of k is 0.1 to 0.3, and D2 is the impeller diameter.

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