Impeller of a water pump and water pump
By arranging centrifugal blades and inclined blades in a cross pattern on the impeller of the water pump, the problems of unreasonable water flow direction and low flow velocity are solved, achieving more efficient water flow control and stability, and improving the fish suction effect and operational stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DAYAN ZHICHUANG (HANGZHOU) CULTURAL & CREATIVE CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-21
AI Technical Summary
The impeller structure of the existing axial flow pump results in an unreasonable water flow direction and a low jet velocity, which affects the efficiency of negative pressure formation and leads to poor fish suction effect.
The impeller body employs a combination of centrifugal blades and angled blades arranged in a cross pattern. The centrifugal blades apply radial centrifugal force, while the angled blades guide axial thrust, forming a composite flow channel structure that improves the accuracy of water flow direction control and flow velocity.
It improves the jet velocity and negative pressure formation efficiency of water flow, reduces fluid separation and eddy phenomena, enhances the fish-attracting effect and overall operational stability, and reduces energy consumption.
Smart Images
Figure CN224533062U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water pumps, and in particular to an impeller for a water pump and a water pump. Background Technology
[0002] In operations such as water changes in fishponds, harvesting, and transfer of live fish before transportation, using ordinary water pumps for drainage or diversion can easily cause fish to be sucked into the pump body. The high-speed rotating impeller can also cause mechanical damage such as cutting, crushing, or tearing, severely impacting their survival rate and economic value. To address these issues, existing technologies propose a water pump design with an internal and external dual-channel structure. The internal channel accommodates the fish, while the external channel houses the impeller. The internal and external channels are connected by a connecting port in the interlayer. During operation, the impeller rotates in the external channel, driving water flow outwards and creating a negative pressure suction at the connecting port, thereby guiding the fish along the internal channel and achieving the purpose of fish suction.
[0003] However, most commonly used impellers are axial flow pump structures, in which the water flow direction is mainly along the impeller axis from the inlet to the outlet. It is difficult to effectively guide the water flow to the connecting port in the interlayer, resulting in a low water flow velocity ejected from the connecting port, which in turn affects the negative pressure formation efficiency and ultimately causes poor fish suction effect. Utility Model Content
[0004] The purpose of this invention is to provide an impeller for a water pump that solves the problems of unreasonable water flow direction and low jet velocity caused by the impeller structure in the prior art, so as to make the water flow direction driven by the impeller more reasonable and the jet velocity higher.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an impeller for a water pump, comprising an annular impeller body, wherein multiple blade groups are spaced apart in the circumferential direction of the annular impeller body, each blade group comprising centrifugal blades and tilting blades, wherein the surface of the centrifugal blades extends along the axial direction of the annular impeller body and is used to apply radial centrifugal force to the fluid, wherein the surface of the tilting blades is inclined relative to the rotation axis of the annular impeller body and is used to guide the fluid to generate axial thrust, wherein the centrifugal blades and tilting blades are arranged in a cross pattern in each blade group to guide the fluid located at the center of the annular impeller body to flow along its outer circumference and in the axial direction.
[0006] After adopting the above technical solution, this utility model has the following advantages: the centrifugal blades extend axially along the annular impeller body to apply a stable radial centrifugal force to the fluid, causing the water flow to be thrown from the center of the impeller to the outer periphery; the inclined blades are set at an angle relative to the rotation axis of the annular impeller body, which can guide the fluid to generate axial thrust, causing the water flow to flow in the axial direction. The two are arranged in a cross pattern in each blade group to form a composite flow channel structure, enabling the fluid to achieve a composite flow path from the center to the outer periphery and along the axial direction inside the impeller. This design not only improves the control accuracy of the water flow direction and makes the water flow more reasonably matched to the pump body structure, but is also particularly beneficial to the jet requirements of the connecting port in a dual-channel pump. At the same time, the radial water flow generated by the centrifugal blades will not remain in the flow channel for a long time, but will be guided and discharged in time by the inclined blades, effectively reducing fluid separation, eddies and turbulent flow phenomena, forming a more uniform and stable flow field, reducing energy loss and avoiding water splashing. In addition, this structure is also conducive to maintaining a good dynamic balance state of the impeller when rotating at high speed, improving the overall operational stability.
[0007] Furthermore, the centrifugal blade includes a straight section and a curved section, the curved section being located at the end edge region of the centrifugal blade, and the straight section and the curved section having a smooth transition.
[0008] Using the aforementioned technical solution, the straight section, as the main working part of the centrifugal blade, has a structure parallel to the rotation axis that helps apply a uniform and continuous radial centrifugal force to the fluid, ensuring that the water flow is stably transported from the impeller center to the outer periphery, thereby improving transport efficiency. The curved section, located at the tip of the blade, guides the fluid to flow smoothly along a curved direction, avoiding direct vertical splashing and effectively improving the stability and continuity of the flow. Furthermore, the smooth transition between the straight and curved sections allows for a continuous and stable flow process between the two sections, reducing flow resistance and impact, improving flow field stability, and simultaneously reducing local energy loss.
[0009] Furthermore, the centrifugal blades of the multiple blade groups are all radially inclined to the annular impeller body.
[0010] By adopting the aforementioned technical solution, multiple blade groups are arranged in a uniform inclined manner, resulting in a more uniform mass distribution of the impeller. This helps maintain a good dynamic balance during high-speed rotation, reducing vibration and noise, and improving operational stability. Simultaneously, the inclined arrangement of the centrifugal blades guides the fluid more smoothly as it exits the impeller channel, minimizing fluid separation or eddies caused by abrupt changes in flow direction, thereby reducing energy loss and improving overall hydraulic efficiency.
[0011] Furthermore, the edges of the centrifugal blades are rounded.
[0012] By adopting the aforementioned technical solution, the rounded corner structure enables the fluid to achieve a smoother transition when flowing over the blade edge, effectively avoiding fluid separation and the generation of local eddies caused by sharp edges, thereby improving the flow field distribution and reducing hydraulic losses.
[0013] Furthermore, the inlet angle of the tilting blade relative to the radial direction is α, 25°≤α≤30°, and the outlet angle of the tilting blade relative to the radial direction is β, 40°≤β≤45°.
[0014] Through the above technical solutions, the inlet angle α of the tilted blades is set within the range of 25° to 30°, allowing the fluid to enter the impeller channel more smoothly, reducing impact losses caused by inconsistent flow directions, thereby improving suction efficiency. Simultaneously, this angle range helps enhance the adhesion of the water flow to the surface of the tilted blades, reducing boundary layer separation and further improving hydraulic performance. The outlet angle β of the tilted blades is set within the range of 40° to 45°, which helps guide the fluid out of the impeller in a reasonable direction, enhancing the axial component of the water flow and the jet velocity, increasing the kinetic energy intensity when ejected from the nozzle, and thus enhancing the negative pressure induction effect on the first fluid channel, ensuring the operational effectiveness of special applications such as fish suction. The reasonable inlet and outlet angle design also helps to achieve uniform fluid distribution within the impeller channel, reducing local pressure fluctuations, thereby improving the dynamic balance of the impeller during rotation, reducing vibration and noise, and improving operational stability and service life.
[0015] Furthermore, the thickness of the tilting blade gradually decreases from its root to its tip, and the root of the tilting blade is used for fixed connection with the centrifugal blade.
[0016] Through the above technical solution, the linear velocity varies at different radii during impeller rotation. The root region has a lower linear velocity but bears higher pressure, while the outer edge region has a higher linear velocity and relatively lower pressure. The angled blades adopt a design where the thickness gradually decreases from the root to the tip, which can better adapt to this flow characteristic. In the root region, the thicker design of the angled blades provides sufficient structural strength to withstand higher pressure loads and effectively prevents fracture or fatigue damage caused by stress concentration, thereby improving the overall structural reliability and service life. In the tip region, the reduced thickness of the angled blades conforms to the high-speed, low-pressure flow environment, helps to reduce water flow resistance, reduces the risk of boundary layer separation, and allows the water flow to adhere more smoothly to the blade surface, thereby effectively suppressing adverse phenomena such as eddies, cavitation, and water splashing.
[0017] Furthermore, the blade assembly also includes a mounting base extending toward the axial direction of the annular impeller body, the centrifugal blades and the tilting blades being fixed on the mounting base, and the mounting bases of adjacent blade assemblies being spaced apart to form a flow channel for fluid passage.
[0018] Through the above technical solution, the mounting base provides a unified support platform for centrifugal and angled blades, making the stress on each blade more uniform and helping to improve the overall structural strength and fatigue resistance. Maintaining an appropriate distance between the mounting bases of adjacent blade groups not only forms a regular and unobstructed flow channel but also helps to improve the pressure distribution inside the impeller, reduce local pressure fluctuations, and allow fluid to smoothly enter and exit the impeller area. This effectively suppresses eddy current generation, reduces energy loss, and improves the overall hydraulic performance of the pump.
[0019] Furthermore, the centrifugal blades and the tilting blades are disposed on one axial side of the annular impeller body, and a reinforcing rib is provided at the end near the mounting base.
[0020] Through the above technical solution, the blades bear significant hydraulic loads during operation, especially in the root region near the mounting base, which is a stress concentration area. By installing reinforcing ribs at this location, the structural strength and load-bearing capacity of the blade root can be significantly enhanced, effectively preventing fracture or plastic deformation caused by excessive local stress, thereby improving the structural reliability and service life of the blades. The surface of the reinforcing ribs is streamlined, making it more compatible with the fluid flow direction. Compared to traditional right-angled or angular reinforcing rib structures, the smoothness and gradual transition of the streamlined surface allow water to flow more smoothly along the reinforcing rib surface, reducing the possibility of boundary layer separation. Simultaneously, the streamlined design reduces local velocity abrupt changes and pressure fluctuations, minimizing energy loss and hydraulic noise caused by flow disturbances.
[0021] Furthermore, the cross angles of the centrifugal blades and tilting blades in the multiple blade groups are all the same.
[0022] The above technical solutions are beneficial in two ways: firstly, they help to achieve a uniform distribution of fluid in the impeller channel, making the water flow more stable and symmetrical, thereby reducing local eddies and energy loss and improving hydraulic performance; secondly, they also help to achieve a uniform distribution of the overall force on the impeller, avoiding vibration and off-center loading caused by structural asymmetry, and improving operational stability and service life.
[0023] Another objective of this utility model is to provide a water pump, comprising an inner shell and an outer shell sleeved on the outside of the inner shell. The inner shell and the outer shell are fixed together. A first fluid channel is provided on the inner side of the inner shell, the first fluid channel having a first inlet and a first outlet. A second fluid channel is formed between the outer side of the inner shell and the outer shell, the second fluid channel having a second inlet. The second inlet is disposed on the inner shell and communicates with the first fluid channel. A spray nozzle is provided on the inner shell, the spray nozzle communicating with the first fluid channel and the second fluid channel. An impeller of the water pump described above is provided in the second fluid channel. The impeller is driven by a drive component, so that water flows from the second inlet to the spray nozzle in the second fluid channel and is sprayed into the first fluid channel through the spray nozzle.
[0024] The above technical solution employs a dual-channel structure, with the first fluid channel being a non-powered zone used to accommodate the medium to be transported, such as fish. The second fluid channel is the powered zone, where water is accelerated by the impeller and then sprayed at high speed into the first fluid channel through a nozzle. The jet creates negative pressure in the first channel, generating thrust that drives the medium to flow in the outflow direction, achieving a contactless and efficient "dynamic-driven" transport, thus effectively reducing mechanical damage to the medium. The impeller includes centrifugal blades and angled blades, which work together during rotation to accelerate the water flow in the second fluid channel and create a low-pressure zone in this area. This attracts water from the first fluid channel to enter the second fluid channel through a second inlet located on the inner shell. Among them, the centrifugal blades extend radially and apply a stable centrifugal force to the water flow, causing the water flow to move from the center to the outer periphery; while the tilting blades further guide the water flow on the outer periphery to generate an axial component force, so that the water flow can be more efficiently converged to the nozzle and sprayed into the first fluid channel at high speed. This not only enhances the water suction capacity and jet velocity, but also significantly improves the negative pressure formation efficiency, thereby ensuring a good fish suction effect and overall conveying performance. Attached Figure Description
[0025] The present invention will be further described below with reference to the accompanying drawings:
[0026] Figure 1 This is a schematic diagram of the impeller of the water pump in Embodiment 1 of this utility model;
[0027] Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;
[0028] Figure 3 This is a structural schematic diagram of the impeller of the water pump in Embodiment 1 of this utility model from another perspective;
[0029] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point B;
[0030] Figure 5 This is a cross-sectional view of the impeller of the water pump in Embodiment 1 of this utility model;
[0031] Figure 6 This is a schematic diagram of the water pump in Embodiment 2 of this utility model;
[0032] Figure 7 For the present utility model Figure 6 Enlarged view of the structure at point C;
[0033] Figure 8 This is a partial structural diagram of the water pump in Embodiment 2 of this utility model;
[0034] In the diagram, 1 is the impeller; 10 is the annular impeller body; 20 is the blade assembly; 21 is the centrifugal blade; 211 is the straight section; 212 is the curved section; 213 is the rounded corner; 22 is the tilting blade; 221 is the root; 222 is the end; 23 is the mounting base; 24 is the flow channel; 25 is the reinforcing rib; 30 is the inner shell; 31 is the outer shell; 32 is the first fluid channel; 33 is the first inlet; 34 is the first outlet; 35 is the second fluid channel; 36 is the second inlet; 37 is the spray nozzle; 40 is the motor; 41 is the driving wheel; 42 is the transmission belt; 43 is the driven wheel; 44 is the bearing; and 45 is the pressure wheel. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0036] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.
[0037] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.
[0038] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.
[0039] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.
[0040] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.
[0041] Example 1:
[0042] like Figures 1 to 5 As shown, this utility model provides an impeller for a water pump, including an annular impeller body 10. Multiple blade groups 20 are spaced apart in the circumferential direction of the annular impeller body 10. Each blade group 20 includes a centrifugal blade 21 and an inclined blade 22. The surface of the centrifugal blade 21 extends along the axial direction of the annular impeller body 10 and is used to apply radial centrifugal force to the fluid. The surface of the inclined blade 22 is inclined relative to the rotation axis of the annular impeller body 10 and is used to guide the fluid to generate axial thrust. The centrifugal blade 21 and the inclined blade 22 are arranged in a cross pattern in each blade group 20 to guide the fluid located at the center of the annular impeller body 10 to flow along its outer circumference and in the axial direction.
[0043] Centrifugal blades 21 extend axially along the annular impeller body 10, applying a stable radial centrifugal force to the fluid, causing the water flow to be thrown from the center of the impeller 1 to the outer periphery. Inclined blades 22 are tilted relative to the rotation axis of the annular impeller body 10, guiding the fluid to generate axial thrust and causing the water to flow axially. Both are arranged crosswise in each blade group 20, forming a composite flow channel structure, enabling the fluid to achieve a composite flow path from the center to the outer periphery and along the axial direction within the impeller 1. This design not only improves the control accuracy of the water flow direction and allows for a more reasonable matching of the water flow with the pump body structure, but is also particularly beneficial for the injection requirements of the connecting port in a dual-channel pump. Simultaneously, the radial water flow generated by the centrifugal blades 21 does not remain stagnant in the flow channel 24 for extended periods, but is promptly guided and discharged by the inclined blades 22, effectively reducing fluid separation, eddies, and turbulent flow phenomena, forming a more uniform and stable flow field, reducing energy loss, and preventing water splashing. Furthermore, this structure also helps the impeller 1 maintain good dynamic balance during high-speed rotation, improving overall operational stability.
[0044] It should be noted that two centrifugal blades 21 and two angled blades 22 are each provided, arranged in a cross shape perpendicular to each other. This structure can achieve uniform mass distribution and stress state of impeller 1 during high-speed rotation, effectively improve dynamic balance performance, reduce vibration and noise caused by off-center loading, thereby improving operational stability and service life.
[0045] The blade assembly 20 also includes a mounting base 23 extending towards the axial direction of the annular impeller body 10. The centrifugal blades 21 and the tilting blades 22 are fixed on the mounting base 23, making the force on each blade more uniform and helping to improve the overall structural strength and fatigue resistance. The mounting bases 23 of adjacent blade assemblies 20 are spaced apart to form flow channels 24 for fluid passage, which helps to improve the pressure distribution inside the impeller 1, reduce local pressure fluctuations, and allow the fluid to smoothly enter and exit the impeller 1 area, thereby effectively suppressing eddy current generation, reducing energy loss, and improving the overall hydraulic performance of the pump.
[0046] Centrifugal blades 21 and angled blades 22 bear significant hydraulic loads during operation, especially in the root region 221 near the mounting base 23, which is a stress concentration area. Therefore, in this application, centrifugal blades 21 and angled blades 22 are positioned on one axial side of the annular impeller body 10, and each end near the mounting base 23 is provided with a reinforcing rib 25. This significantly enhances the structural strength and load-bearing capacity of the blade root 221, effectively preventing fracture or plastic deformation caused by excessive local stress, thereby improving the structural reliability and service life of the blades. The surface of the reinforcing rib 25 is streamlined, making it more compatible with the fluid flow direction. Compared to the traditional right-angled or angular reinforcing rib structure, the smoothness and gradual transition of the streamlined surface allows water to flow more smoothly along the surface of the reinforcing rib 25, reducing the possibility of boundary layer separation. Simultaneously, the streamlined design reduces local velocity abrupt changes and pressure fluctuations, minimizing energy loss and hydraulic noise caused by flow disturbances.
[0047] In this design, the centrifugal blades 21 and the tilting blades 22 of the multiple blade groups 20 all have the same intersection angle. On the one hand, this helps to achieve a uniform distribution of fluid in the flow channel 24, making the water flow more stable and symmetrical, thereby reducing local eddies and energy loss and improving hydraulic performance; on the other hand, it also helps to achieve a uniform distribution of the overall force on the impeller 1, avoiding vibration and off-center loading caused by structural asymmetry, and improving operational stability and service life.
[0048] Specifically, the centrifugal blades 21 of the multiple blade groups 20 are radially inclined with the annular impeller body 10, making the overall mass distribution of the impeller 1 more uniform. This helps maintain a good dynamic balance during high-speed rotation, reducing vibration and noise, and improving operational stability. Simultaneously, the inclined arrangement of the centrifugal blades 21 guides the fluid more smoothly as it exits the flow channel 24, minimizing fluid separation or eddies caused by sudden changes in flow direction, thereby reducing energy loss and improving overall hydraulic efficiency.
[0049] Furthermore, the centrifugal blade 21 has rounded corners 213 at its edges. The rounded corners 213 structure allows the fluid to transition more smoothly when flowing over the blade edges, effectively avoiding fluid separation and the generation of local eddies caused by sharp edges, thereby improving the flow field distribution and reducing hydraulic losses. The rounded corners 213 face the water inlet direction, effectively reducing the local resistance when the water flows into the flow channel 24.
[0050] The centrifugal blade 21 includes a straight section 211 and a curved section 212. The straight section 211, as the main working part of the centrifugal blade 21, has a structure parallel to the rotation axis, which helps to apply a uniform and continuous radial centrifugal force to the fluid, ensuring that the water flow is stably transported from the center of the impeller 1 to the outer periphery, thereby improving the transport efficiency. The curved section 212 is located at the edge region of the end 222 of the centrifugal blade 21, which can guide the fluid to flow out smoothly along the curved direction, avoiding direct vertical splashing of water, and effectively improving the stability and continuity of the flow. In addition, the straight section 211 and the curved section 212 are connected by a smooth transition, so that the fluid can achieve a continuous and stable flow process between the two sections, reducing flow resistance and impact, improving flow field stability, and reducing local energy loss.
[0051] The inlet angle α of the inclined blade 22 relative to the radial direction is α. If the inlet angle α of the inclined blade 22 is less than 25°, the inlet direction of the inclined blade 22 is too close to the radial direction of the impeller 1, causing the fluid entry direction to be inconsistent with the actual guiding direction of the inclined blade 22. This can easily lead to significant impact losses, affecting suction efficiency and even causing local vortex phenomena. Conversely, when the inlet angle α is greater than 30°, the inlet of the inclined blade 22 is too tilted, which may result in a longer fluid flow path, increased resistance, and reduced hydraulic efficiency. Therefore, in this application, the inlet angle α of the inclined blade 22 is set in the range of 25° to 30°, allowing the fluid to enter the flow channel 24 more smoothly, reducing impact losses caused by inconsistent flow directions, thereby improving suction efficiency. At the same time, this angle range helps to enhance the adhesion of the water flow to the surface of the inclined blade 22, reduce boundary layer separation, and further improve hydraulic performance.
[0052] Furthermore, the outlet angle β of the inclined blade 22 relative to the tangential direction is β. If the outlet angle β is less than 40°, the water discharge direction is more biased towards the radial direction of the impeller 1, resulting in insufficient axial force and difficulty in forming an effective jet velocity. When the outlet angle β exceeds 45°, the water discharge direction tends to be tangential, leading to uneven flow field distribution, increased local pressure fluctuations, and easy vibration and noise, affecting the stability and reliability of the impeller 1. Therefore, in this application, the outlet angle β of the inclined blade 22 is set in the range of 40° to 45°, which is beneficial for guiding the fluid to exit the impeller 1 in a reasonable direction, enhancing the axial force and jet velocity of the water flow, increasing the kinetic energy intensity when ejected from the nozzle 37, and thus enhancing the negative pressure induction effect on the first fluid channel 32, ensuring the operational effect of special applications such as fish suction. The reasonable inlet and outlet angle design also helps to achieve uniform distribution of fluid in the impeller 1 flow channel 24, reduce local pressure fluctuations, thereby improving the dynamic balance state of the impeller 1 during rotation, reducing vibration and noise, and improving operational stability and service life.
[0053] Preferably, α is 28°, β is 42°, and the annular impeller body 10 has 12 sets of blades 20, which can achieve good matching of fluid inlet and outlet, taking into account suction efficiency, jetting capacity and operational stability. The transverse length of the centrifugal blade 21 is L1, L1 = 10 mm, the longitudinal height of the centrifugal blade 21 is L2, L2 = 5 mm, the inner diameter of the annular blade body is L3, L3 = 205.2 mm, and the outer diameter of the annular blade body is L4, L4 = 229.2 mm.
[0054] During the rotation of the impeller 1, the linear velocity varies at different radii. The root region 221 has a lower linear velocity but experiences higher pressure, while the outer edge region has a higher linear velocity and relatively lower pressure. Therefore, in this application, the thickness of the angled blade 22 gradually decreases from its root 221 towards its tip 222, better adapting to this flow characteristic. The root 221 of the angled blade 22 is used for fixed connection with the centrifugal blade 21. In the root region 221, the thicker design of the angled blade 22 provides sufficient structural strength to withstand higher pressure loads and effectively prevents fracture or fatigue damage caused by stress concentration, thereby improving the overall structural reliability and service life. In the tip region 222, the reduced thickness of the angled blade 22 conforms to the high-speed, low-pressure flow environment, helping to reduce water flow resistance, decrease the risk of boundary layer separation, and allow water to adhere more smoothly to the blade surface, thereby effectively suppressing adverse phenomena such as eddies, cavitation, and water splashing.
[0055] It is understood that in other embodiments, the number and arrangement of centrifugal blades and tilting blades are not limited to a cross arrangement. Multiple blades can be set according to actual needs, and different arrangement methods such as non-orthogonal angle, alternating arrangement or offset arrangement can be adopted to meet the pump performance requirements while taking into account manufacturing feasibility and operational stability.
[0056] Example 2:
[0057] like Figures 6 to 8 As shown, this embodiment discloses a water pump, including an inner shell 30 and an outer shell 31 sleeved on the outside of the inner shell 30. The inner shell 30 and the outer shell 31 are fixed. A first fluid channel 32 is provided on the inner side of the inner shell 30. The first fluid channel 32 has a first inlet 33 and a first outlet 34. A second fluid channel 35 is formed between the outer side of the inner shell 30 and the outer shell 31. The second fluid channel 35 has a second inlet 36. The second inlet 36 is disposed on the inner shell 30 and communicates with the first fluid channel 32. The inner shell 30 is provided with a spray nozzle 37. The spray nozzle 37 connects the first fluid channel 32 and the second fluid channel 35. The impeller 1 of the water pump of the above technical solution is provided in the second fluid channel 35. The impeller 1 is driven by a driving member so that water flows from the second inlet 36 to the spray nozzle 37 in the second fluid channel 35 and is sprayed into the first fluid channel 32 through the spray nozzle 37.
[0058] The system employs a dual-channel structure, with the first fluid channel 32 being a non-powered zone for containing the medium to be transported, such as fish. The second fluid channel 35 is the powered zone, where water is accelerated by the impeller 1 and then injected at high speed into the first fluid channel 32 through the nozzle 37. The jet creates negative pressure in the first fluid channel 32, generating thrust that drives the medium to flow in the outlet direction, achieving a contactless and efficient "dynamic-driven" transport, thus effectively reducing mechanical damage to the medium. The impeller 1 includes centrifugal blades 21 and tilting blades 22, which work together during rotation to accelerate the water flow in the second fluid channel 35 and create a low-pressure zone in this area. This draws water from the first fluid channel 32 into the second fluid channel 35 through the second inlet 36 located on the inner shell 30. Among them, the centrifugal blade 21 extends radially and applies a stable centrifugal force to the water flow, causing the water flow to flow from the center of the centrifugal blade 21 to the outer periphery and close to the inner shell 30; while the tilting blade 22 further guides the water flow on the outer periphery to generate an axial component force, so that the water flow can be more efficiently converged to the nozzle 37 and sprayed into the first fluid channel 32 at high speed. This not only enhances the water suction capacity and jet speed, but also significantly improves the negative pressure formation efficiency, thereby ensuring a good fish suction effect and overall conveying performance.
[0059] The annular impeller body 10 is rotatably connected to the outer tube via bearing 44. A drive unit drives the impeller 1 to rotate via a transmission assembly. The drive unit is a motor 40. The transmission assembly includes a driving wheel 41, a driven wheel 43, and a transmission belt 42. The driving wheel 41 is fixed to the output shaft of the motor 40. The driven wheel 43 is fixedly connected to the annular impeller body 10. The outer tube has an opening for the transmission belt 42 to be inserted. The transmission belt 42 connects the driven wheel 43 and the driving wheel 41 to transmit the power of the motor 40 to the annular impeller body 10, thereby driving the annular impeller body 10 to rotate. To improve sealing, a sealing ring is provided between the annular impeller body 10 and the outer tube. To ensure that the transmission belt 42 is always taut, a pressure wheel 45 is provided to press the transmission belt 42, ensuring that the power of the motor 40 is transmitted to the impeller 1 more efficiently.
[0060] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.
Claims
1. An impeller for a water pump, characterized in that, The impeller includes an annular impeller body, with multiple blade groups spaced apart along its circumference. Each blade group includes centrifugal blades and tilting blades. The surface of the centrifugal blades extends along the axial direction of the annular impeller body. The centrifugal blades are used to apply radial centrifugal force to the fluid. The surface of the tilting blades is inclined relative to the rotation axis of the annular impeller body. The tilting blades are used to guide the fluid to generate axial thrust. The centrifugal blades and tilting blades are arranged in a cross pattern in each blade group to guide the fluid located at the center of the annular impeller body to flow along its outer circumference and in the axial direction.
2. The impeller of the water pump according to claim 1, characterized in that, The centrifugal blade includes a straight section and a curved section, the curved section being located at the end edge region of the centrifugal blade, and the straight section and the curved section having a smooth transition.
3. The impeller of the water pump according to claim 2, characterized in that, The centrifugal blades of the multiple blade groups are all radially inclined to the annular impeller body.
4. The impeller of the water pump according to claim 1, characterized in that, The edges of the centrifugal blades are rounded.
5. The impeller of the water pump according to claim 1, characterized in that, The inlet angle of the tilting blade relative to the radial direction is α, where 25°≤α≤30°, and the outlet angle of the tilting blade relative to the radial direction is β, where 40°≤β≤45°.
6. The impeller of the water pump according to claim 1, characterized in that, The thickness of the tilting blade gradually decreases from its root to its tip, and the root of the tilting blade is used for fixed connection with the centrifugal blade.
7. The impeller of the water pump according to claim 1, characterized in that, The blade assembly also includes a mounting base extending toward the axial direction of the annular impeller body. The centrifugal blades and the tilting blades are fixed on the mounting base, and the mounting bases of adjacent blade assemblies are spaced apart to form a flow channel for fluid to pass through.
8. The impeller of the water pump according to claim 7, characterized in that, The centrifugal blades and tilting blades are located on one axial side of the annular impeller body, and are provided with reinforcing ribs at the end near the mounting base.
9. The impeller of the water pump according to claim 7, characterized in that, The centrifugal blades and tilting blades of the multiple blade groups all have the same intersection angle.
10. A water pump, characterized in that, The device includes an inner shell and an outer shell fitted over the outer side of the inner shell. The inner shell and the outer shell are fixed together. The inner side of the inner shell is provided with a first fluid channel, which has a first inlet and a first outlet. The outer side of the inner shell and the outer shell form a second fluid channel, which has a second inlet. The second inlet is located on the inner shell and communicates with the first fluid channel. The inner shell is provided with a spray nozzle, which connects the first fluid channel and the second fluid channel. The second fluid channel is provided with an impeller of the water pump according to any one of claims 1 to 9. The impeller is driven by a drive component so that water flows from the second inlet to the spray nozzle in the second fluid channel and is sprayed into the first fluid channel through the spray nozzle.