A centrifugal pump impeller
By designing equivariant angle streamlined blades and spiral secondary blades in centrifugal pump impellers, combined with the design of sand conduction gaps, the problems of poor durability, sediment deposit and friction are solved, and the effect of improving sediment flow rate and impeller service life is achieved.
Patent Information
- Application Number
- CN202421619321.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-10
AI Technical Summary
During the transportation of silt and sand, the blades of existing centrifugal pump impellers have poor durability and are prone to wear; the gap between the impeller and the pump body is small, and it is easy to accumulate silt and sand when rotating at high speed, resulting in wear; the internal design of the impeller is unreasonable, and the friction force is high, which affects the silt and sand flow rate.
Design an equal-angle streamlined blade with an equal-angle spiral structure on the inner side of the blade, and the thickness gradually increases from the center; a secondary blade is arranged on the front and rear sides of the impeller, and the secondary blade is spiral, including an inclined surface and a projecting surface, which is used to cut the diversion silt; a sand guide gap is set between the impeller and the pump body to prevent the accumulation of silt.
Through the design of equal-variable angle streamlined blades, the friction of silt and sand in the conveying chamber is reduced, and the service life of the impeller is improved. The design of the secondary blades effectively avoids the backlog of silt and sand between the impeller and the pump body, reduces friction and extends the service life of the equipment.
Smart Images
Figure CN222731774U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of centrifugal pump accessories, and in particular relates to a centrifugal pump impeller. Background Art
[0002] In the existing field of sediment transportation technology, the usual transportation method is to use a centrifugal pump to pressurize the sediment, and then realize long-distance transportation after the pipeline is connected. The centrifugal pump is widely used in the existing material transportation field. The impeller at the center is mostly a closed structure, that is, the front and rear side walls are set to cover the blades, and the sediment is guided to the conveying chamber between the multiple blades through high-speed rotation, thereby realizing pressurized transportation; the current technical problems encountered are: 1. Due to the continuous friction and collision between the sediment and the blades during the sediment transportation process, the blades have poor durability and increased loss rate; 2. When the impeller is fixed inside the pump body, due to the small gap between the impeller and the pump body, the sediment is easily accumulated between the impeller and the pump body during high-speed rotation, which is easy to cause wear of the impeller or the pump body after long-term operation; 3. The internal design of the impeller is unreasonable. After centrifugal acceleration, the sediment has a large friction inside the impeller, which affects the sediment flow rate.
[0003] As R&D technicians in this field, the technical problem that urgently needs to be solved is to design or improve a centrifugal pump impeller that can effectively reduce the material backlog between the impeller and the pump body and avoid damage to the pump body through structural changes while improving product durability, while improving the transportation efficiency of sediment materials. Summary of the invention
[0004] In order to overcome the shortcomings of the prior art, the utility model provides a centrifugal pump impeller with a novel structural design. The blades are designed to be equivariable angle streamlined, so that the mud and sand tend to be stable when flowing in the conveying chamber, reducing friction. At the same time, the front and rear sides of the centrifugal pump impeller are improved and designed to prevent the mud and sand from accumulating between the impeller and the pump body, causing increased friction and thus causing damage to the impeller or the pump body.
[0005] In order to achieve the above technical purpose, the utility model adopts the following scheme: a centrifugal pump impeller, which includes a body, the body is composed of a front side panel and a rear side panel and a plurality of blades therebetween;
[0006] A feed port is arranged at the center of the front panel, and the feed port is tapered; auxiliary blades are arranged on both the front panel and the rear panel, and the auxiliary blades protrude from the front panel and the rear panel; a sand guiding gap is arranged between the outermost side of the auxiliary blade and the outer diameter of the body;
[0007] The blade adopts a streamlined design, which includes an inner side and an outer side. The inner side is a spiral line structure with an equivariable angle and the thickness gradually increases from the center to the outside; the streamline of the inner side is composed of a plurality of tangentially arranged arcs. This structure forms a smooth flow channel on the inner side of the blade. The blade with an equivariable angle spiral line structure is easy to manufacture and can ensure quality. When the sediment flows, it tends to a stable state in the conveying chamber, effectively reducing friction, increasing the sediment flow rate, and also increasing the service life of the impeller and the pumping efficiency.
[0008] The auxiliary blade is spirally arranged, including an inclined surface and a convex surface, and the inclined surface smoothly connects the convex surface with the front side panel or the rear side panel. The auxiliary blade can realize the sand cutting and diversion when the main body rotates, avoiding the increase of resistance caused by the direct impact of the main body on the sand.
[0009] Inside the feed port, a guide protrusion is arranged at the front center of the rear panel, and the guide protrusion can effectively guide the mud and sand to the periphery to prevent the mud and sand from directly impacting the rear panel.
[0010] When the blades are set, in the main view, the initial section of the blades is exposed in the feed port. Through this design, when the sediment enters the feed port vertically, the sediment flow can be broken up by the initial section of the blades, thereby reducing the impact force for subsequent centrifugal transportation.
[0011] An extension section is arranged at the front end of the initial section of the blade, and the extension section is arranged obliquely and gradually rises from the fixed surface to the blade.
[0012] A boosting protrusion is arranged on the inner side of the front panel in the conveying chamber. The structure of the boosting protrusion is high in the middle and low at both ends or low at the starting end and high at the tail end. Its purpose is to apply force and boost pressure to the rear side of the impeller when the impeller rotates at high speed.
[0013] The outer end of the blade is provided with a rounded transition, which prevents the mud and sand from being impacted at right angles when leaving the impeller.
[0014] The beneficial effects of the utility model are as follows: the utility model is composed of a front panel and a rear panel and a plurality of blades therebetween; a feed port is arranged at the center of the front panel, and the feed port is arranged in a taper; auxiliary blades are arranged on both the front panel and the rear panel, and the auxiliary blades protrude from the front panel and the rear panel; a sand guiding gap is arranged between the outermost side of the auxiliary blade and the outer diameter of the main body, and the design of such sand guiding gap can prevent the accumulation of mud and sand between the pump body and the impeller body, causing high-speed friction, thereby causing damage to the pump body or the impeller; the blade adopts a streamlined design, the front side of the impeller is an equivariable angle spiral structure, and the thickness gradually increases from the center to the outside; the streamline of the front side is composed of a plurality of tangent arcs, and the blades with an equivariable angle spiral structure are easy to manufacture and can ensure quality. When mud and sand flow, this structure forms a smooth flow channel on the front side of the impeller, tends to a stable state in the conveying chamber, effectively reduces friction, increases the mud and sand flow rate, and can also increase the service life of the impeller and improve the pumping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the main structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the side sectional structure of the utility model;
[0018] Figure 4 This is a schematic diagram of the blade design principle of the utility model;
[0019] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of the middle A area;
[0020] In the accompanying drawings, 1. main body, 10. front side panel, 11. rear side panel, 13. conveying chamber, 14. guide protrusion, 2. auxiliary blade, 21. inclined surface, 22. protruding surface, 3. sand guide gap, 4. feed inlet, 5. blade, 51. extension section, 52. inner side surface, 53. outer side surface, 54. fillet, 55. initial section of blade, 6. fixed axis, 7. boost protrusion. DETAILED DESCRIPTION
[0021] The present invention is further described below through implementation modes. Those skilled in the art may refer to the implementation modes for implementation, and may also make technical improvements and innovations based on the technical foundation of the existing technical solutions.
[0022] Example:
[0023] A centrifugal pump impeller comprises a body 1, wherein the body 1 is composed of a front panel 10 and a rear panel 11 and a plurality of blades 5 therebetween; in this embodiment, the blades 5 are evenly distributed in number, and a conveying chamber 13 is formed between every two adjacent blades 5.
[0024] The center of the front panel 10 is provided with a feed port 4, and the feed port 4 is tapered, and this structure facilitates the inflow of mud and sand; the front panel 10 and the rear panel 11 are both provided with auxiliary blades 2, such as Figure 1 , 2 As shown, there are multiple auxiliary blades 2 and they are evenly distributed on the front panel 10 and the rear panel 11; the improvement of the utility model is that the auxiliary blades 2 protrude from the front panel 10 and the rear panel 11 and are spirally arranged; they include an inclined surface 21 and a protruding surface 22, and the inclined surface 21 smoothly connects the protruding surface 22 with the front panel 10 or the rear panel 11. Through this design of the auxiliary blades 2, it is possible to cut and divert the mud and sand when the main body is fixed inside the pump body and rotates, avoiding the increase in resistance caused by the main body 1 directly impacting the mud and sand. Because the auxiliary blades 2 include the inclined surface 21 and the protruding surface 22, the mud and sand are cut gradually. This action does not directly impact the mud and sand, which can effectively reduce the impact force and avoid affecting the durability of the auxiliary blades 2 themselves.
[0025] Further, such as Figure 1 , 2 As shown in Figures 3, a sand guiding gap 3 is provided between the outermost side of the auxiliary blade 2 and the outer diameter of the main body 1. When the main body 1 and the pump body are assembled, the mud and sand flow between the main body 1 and the pump body and can be separated from the two at the sand guiding gap 3, which can effectively prevent the mud and sand from accumulating in this area, thereby avoiding the mud and sand from damaging the main body 1 and the pump body.
[0026] The design focus of the utility model is that the blade 1 adopts a streamlined design, such as Figure 3 , 4 As shown, it includes an inner side surface 52 and an outer side surface 53. The inner side surface 52 is a spiral structure with a constant angle and the thickness gradually increases from the center to the outside. When the blade 1 rotates, the rotation speed of the material increases rapidly after centrifugation. When it reaches the end of the blade 1, it has a higher rotation speed, and its external impact force will also increase. The impact resistance of the blade is improved by thickening the end of the blade 1.
[0027] Furthermore, the streamlines on the inner side are composed of several segments of tangently arranged arcs. This structure forms a smooth flow channel on the inner side of the blade 1. The blade 1 with an equivariable angle spiral structure is easy to manufacture and can ensure quality. When the sediment flows, it tends to a stable state in the conveying chamber 13, effectively reducing friction, increasing the sediment flow rate, and also increasing the service life of the impeller and the pumping efficiency.
[0028] Further, if Figure 4 As shown, the outer end of the blade 1 is provided with a rounded transition 54, and the rounded transition 54 is used to prevent the mud and sand from being impacted at right angles when leaving the blade 1.
[0029] Based on the above structural design improvements, the utility model also exposes the initial section 55 of the blade in the feed port 4. Figure 1 , 2 As shown, the initial section 55 of the blade can be observed in the feed port 4 in the front view. With this design, when the sediment vertically enters the feed port 4, the initial section 55 of the blade can break up the sediment flow, thereby reducing the impact force for subsequent centrifugal transportation. Figure 5 As shown, the front end of the initial section 55 of the blade is provided with an extension section 51, and the extension section 51 is inclined and gradually rises from the fixed surface to the blade, and the fixed surface here is the rear side panel 11. The purpose of this design is to improve the fixing strength of the blade 1 and realize the progressive cutting and breaking of the sediment flow when the blade rotates at a high speed.
[0030] Inside the feed port 4, a guide protrusion 14 is provided at the front center of the rear panel 11. The guide protrusion 14 is a protrusion that is high in the middle and low and flat around. This guide protrusion 14 can effectively guide the mud and sand to the periphery and prevent the mud and sand from directly impacting the rear panel 11.
[0031] The utility model is based on the above structural arrangement. Figure 3 As shown, on the inner side of the front panel 10, a boosting protrusion 7 is arranged in the conveying chamber 13. The boosting protrusion 7 is high in the middle and low at both ends, or low at the starting end and high at the tail end. In this embodiment, a structure with a high middle and low at both ends is adopted. The purpose of setting such a boosting protrusion 7 is to apply force and pressure to the rear side of the blade 1 when the blade 1 rotates at a high speed, thereby increasing the flow rate and pressure of the sediment when leaving the end of the impeller of the centrifugal pump.
[0032] In summary, the utility model is provided with a sand-guiding gap 3 between the outermost side of the auxiliary blade 2 and the outer diameter of the main body. The design of the sand-guiding gap 3 can prevent the accumulation of silt between the pump body and the impeller body, causing high-speed friction, thereby causing damage to the pump body or the impeller. The blade 1 adopts a streamlined design, and the front side of the impeller 1 is an equivariant angle spiral structure and the thickness gradually increases from the center to the outside; the streamline of the front side is composed of several sections of tangent arcs, and this structure forms a smooth flow channel on the front side of the impeller. This blade with an equivariant angle spiral structure is easy to manufacture and can ensure quality. When the silt flows, it tends to a stable state in the conveying chamber, effectively reducing friction, increasing the silt flow rate, and also increasing the service life of the impeller and the pumping efficiency.
Claims
1. A centrifugal pump impeller, characterized in that: It includes a body, which is composed of a front side panel, a rear side panel and a plurality of blades therebetween; A feed port is arranged at the center of the front panel, and the feed port is tapered; auxiliary blades are arranged on both the front panel and the rear panel, and the auxiliary blades protrude from the front panel and the rear panel; a sand guiding gap is arranged between the outermost side of the auxiliary blade and the outer diameter of the body; The blade adopts a streamlined design, which includes an inner side and an outer side. The inner side is a spiral line structure with an equivariable angle and the thickness gradually increases from the center to the outside; the streamline of the inner side is composed of a plurality of tangent arcs.
2. The centrifugal pump impeller according to claim 1, characterized in that: The auxiliary blade is spirally arranged and comprises an inclined surface and a convex surface. The inclined surface smoothly connects the convex surface with the front side panel or the rear side panel.
3. The centrifugal pump impeller according to claim 1, characterized in that: Inside the feed port, a flow guide protrusion is arranged at the front center of the rear side panel.
4. The centrifugal pump impeller according to claim 1, characterized in that: When viewed from the front, the initial section of the blade is exposed in the feed inlet.
5. The centrifugal pump impeller according to claim 4, characterized in that: An extension section is arranged at the front end of the initial section of the blade, and the extension section is arranged obliquely and gradually rises from the fixed surface to the blade.
6. The centrifugal pump impeller according to claim 1, characterized in that: A boosting protrusion is arranged on the inner side of the front side panel in the conveying chamber, and the structure of the boosting protrusion is high in the middle and low at both ends or low at the starting end and high at the tail end.
7. The centrifugal pump impeller according to claim 1, characterized in that: The outer end of the blade is provided with a rounded transition.