Impeller of water suction pump and water suction pump

Abstract

The invention discloses an impeller of a water suction pump and the water suction pump, belongs to the field of water suction pumps, solves the problems of unreasonable water flow direction and low jet flow velocity caused by an impeller structure in the prior art, and adopts the technical scheme that the impeller of the water suction pump comprises an annular impeller body; a plurality of blade sets are arranged in the circumferential direction of the annular impeller body at intervals, each blade set comprises centrifugal blades and dip angle blades, the surfaces of the centrifugal blades extend in the axial direction of the annular impeller body, the centrifugal blades are used for applying radial centrifugal force to fluid, and the surfaces of the dip angle blades are obliquely arranged relative to the rotation axis of the annular impeller body. The inclined angle blades are used for guiding fluid to generate axial thrust, and the centrifugal blades and the inclined angle blades are arranged in each blade set in a crossed mode so as to guide the fluid located in the center of the annular impeller body to flow along the periphery of the impeller body in the axial direction. The water flow direction driven by the impeller is more reasonable, and the jet flow speed is higher.

Description

Technical Field

[0001] The present invention relates to the field of water pumps, in particular to an impeller of a water pump and the water pump. Background Art

[0002] During operations such as changing water in fish ponds, fishing, and transferring live fish before transport, if ordinary pumps are used for drainage or drainage, fish can easily be sucked into the pump body and suffer mechanical damage such as cutting, crushing, or tearing due to the high-speed rotation of the impeller, seriously affecting their survival rate and economic value. To address this problem, the prior art has proposed a pump design with an inner and outer dual-channel structure, in which the inner channel is used to accommodate fish, and the outer channel is equipped with an impeller; the inner and outer channels are fluidically connected through a connecting port in the interlayer. During operation, the impeller rotates in the outer channel, driving water outward and forming a negative pressure suction at the connecting port, thereby guiding the fish to move along the inner channel and achieve the purpose of attracting fish.

[0003] However, the impellers commonly used at present are mostly axial flow pump structures, and the direction of water movement is mainly along the impeller axis from the inlet to the outlet, which makes it 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 efficiency of negative pressure formation and ultimately causes poor fish suction effect. Summary of the Invention

[0004] The purpose of the present invention is to provide an impeller for a water pump, which solves the problem in the prior art that the impeller structure causes unreasonable water flow direction and low jet flow rate, and makes the water flow direction driven by the impeller more reasonable and the jet flow rate higher.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an impeller of a water pump, comprising an annular impeller body, a plurality of blade groups are arranged at intervals in the circumferential direction of the annular impeller body, each blade group comprises centrifugal blades and inclination 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 inclination blades is inclined relative to the rotation axis of the annular impeller body, the inclination blades are used to guide the fluid to generate axial thrust, the centrifugal blades and the inclination blades are arranged crosswise in each blade group to guide the fluid located in the center of the annular impeller body to flow along its periphery and in the axial direction.

[0006] By adopting the above technical solution, the present invention has the following advantages: centrifugal blades extend axially along the annular impeller body, exerting a stable radial centrifugal force on the fluid, causing the water to flow from the center of the impeller to the periphery. The angled blades are arranged at an angle relative to the rotational axis of the annular impeller body, guiding the fluid to generate axial thrust, forcing the water to flow in the axial direction. The two blades are arranged crosswise within each blade assembly, forming a composite flow path structure, which allows the fluid to flow from the center to the periphery and propel axially within the impeller. This design not only improves the control accuracy of the water flow direction and more effectively matches the water flow to the pump structure, but is particularly beneficial for the injection requirements of the connecting ports in dual-channel pumps. Furthermore, the radial water flow generated by the centrifugal blades does not remain in the flow path for a long time, but is promptly guided and discharged by the angled blades, effectively reducing fluid separation, eddy currents, and turbulent flow, creating a more uniform and stable flow field, reducing energy loss, and avoiding water splashing. Furthermore, this structure helps the impeller maintain good dynamic balance during high-speed rotation, improving overall operational stability.

[0007] Furthermore, the centrifugal blade includes a straight section and a curved section, the curved section is arranged at the end edge area of ​​the centrifugal blade, and there is a smooth transition between the straight section and the curved section.

[0008] With the aforementioned technical solution, the straight section serves as the main working part of the centrifugal blade. Its structure, which is parallel to the axis of rotation, helps to exert a uniform and continuous radial centrifugal force on the fluid, ensuring that the water flows stably from the center of the impeller to the periphery as much as possible, thereby improving the conveying efficiency. The curved section is set in the end area of ​​the blade, which can guide the fluid to flow out smoothly along the curve, avoid direct vertical splashing of the water flow, and effectively improve the stability and continuity of the flow. In addition, a smooth transition is used between the straight section and the curved section, allowing the fluid to 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.

[0009] Furthermore, the centrifugal blades of the plurality of blade groups are arranged to be inclined radially relative to the annular impeller body.

[0010] Using the aforementioned technical solution, multiple blade groups are arranged in a uniform, tilted configuration, resulting in a more uniform mass distribution across the impeller. This helps maintain a good dynamic balance during high-speed rotation, reduces vibration and noise, and improves operational stability. Furthermore, the tilted configuration of the centrifugal blades guides the fluid more smoothly as it exits the impeller passage, minimizing fluid separation or eddies caused by sudden changes in flow direction, thereby reducing energy loss and improving overall hydraulic efficiency.

[0011] Furthermore, the edges of the centrifugal blades are provided with rounded corners.

[0012] By adopting the above-mentioned technical solution, the rounded corner structure can achieve a smoother transition of the fluid when flowing through the blade edge, effectively avoiding the fluid separation phenomenon and the generation of local vortexes caused by sharp edges, thereby improving the flow field distribution and reducing hydraulic losses.

[0013] Furthermore, an inlet angle of the inclined blade relative to the radial direction is α, 25°≤α≤30°, and an outlet angle of the inclined blade relative to the radial direction is β, 40°≤β≤45°.

[0014] Through the above technical solution, the inlet angle α of the angled blade is set within the range of 25° to 30°, allowing the fluid to enter the impeller flow channel more smoothly, reducing the impact loss caused by inconsistent flow direction, and thus improving the suction efficiency. At the same time, this angle range helps to enhance the adhesion of the water flow to the surface of the angled blade, reduce the boundary layer separation phenomenon, and further improve the hydraulic performance. The outlet angle β of the angled blade is set in the range of 40° to 45°, which is conducive to guiding the fluid out of the impeller in a reasonable direction, enhancing the axial component of the water flow and the injection velocity, and increasing the kinetic energy intensity when ejected from the water outlet, thereby enhancing the negative pressure induction effect on the first fluid channel, ensuring the operation effect of special applications such as fish suction. Reasonable inlet and outlet angle design also helps to achieve uniform distribution of fluid in the impeller flow channel, reduce local pressure fluctuations, thereby improving the dynamic balance state of the impeller during rotation, reducing vibration and noise, and improving operational stability and service life.

[0015] Furthermore, the thickness of the inclined blade decreases gradually from its root toward its tip, and the root of the inclined blade is used for fixed connection with the centrifugal blade.

[0016] Through the above technical solution, during the rotation of the impeller, there are differences in the linear velocity at different radii. The linear velocity in the root area is lower but the pressure is higher, while the linear velocity in the outer edge area is high and the pressure is relatively low. The angled blades are designed with a thickness that gradually decreases from the root to the tip, which can better adapt to this flow characteristic. In the root area, the thicker design of the angled blades can provide sufficient structural strength to withstand higher pressure loads and prevent fracture or fatigue damage caused by stress concentration as effectively as possible, thereby improving the reliability and service life of the overall structure; while in the tip area, the thickness of the angled blades is reduced, which conforms to the high-speed and 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 the occurrence of adverse phenomena such as vortexes, cavitation, and splashing.

[0017] Furthermore, the blade group also includes a mounting seat extending toward the axial center direction of the annular impeller body, the centrifugal blades and the pitch blades are fixed on the mounting seat, and the mounting seats of adjacent blade groups are spaced apart to form a flow channel for fluid to pass through.

[0018] Through the technical scheme, the mounting seat provides a unified support platform for the centrifugal blades and the inclined blades, so that the stress of each blade is more uniform, which helps to improve the overall structural strength and fatigue resistance. The mounting seats between adjacent blade groups maintain appropriate spacing, not only forming a regular and smooth flow channel, but also helping to improve the pressure distribution inside the impeller, reduce local pressure fluctuations, enable the fluid to smoothly enter and exit the impeller area, thereby effectively suppressing vortex generation, reducing energy loss, and improving the overall hydraulic performance of the water pump.

[0019] Further, the centrifugal blades and the inclined blades are arranged on one axial side of the annular impeller body, and a reinforcing rib is arranged at one end of the centrifugal blades and the inclined blades close to the mounting seat.

[0020] Through the technical scheme, the blades bear a large hydraulic load during operation, especially at the root area close to the mounting seat, which is a stress concentration area. By arranging the reinforcing rib at this position, 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 blade. The surface of the reinforcing rib is designed in a streamline shape, which is more consistent with the direction of fluid flow. Compared with the traditional straight or angular reinforcing rib structure, the smooth and gradual change of the streamline surface enables the water flow to flow more smoothly on the surface of the reinforcing rib, reducing the possibility of boundary layer separation. At the same time, the streamline design reduces local flow velocity and pressure fluctuations, reducing energy loss and hydraulic noise caused by flow disturbance.

[0021] Further, the intersection angles of the centrifugal blades and the inclined blades of the plurality of blade groups are the same.

[0022] Through the technical scheme, on the one hand, it is beneficial to achieve uniform distribution of fluid in the impeller flow channel, making the water flow more stable and symmetrical, thereby reducing local vortex and energy loss and improving hydraulic performance. On the other hand, it also helps to evenly distribute the overall stress of the impeller, avoiding vibration and unbalanced loading caused by structural asymmetry, and improving operational stability and service life.

[0023] Another object of the present invention is to provide a water pump, comprising an inner shell and an outer shell arranged on the outside of the inner shell, the inner shell and the outer shell being fixed, a first fluid channel being provided on the inner side of the inner shell, the first fluid channel having a first water inlet and a first water outlet, a second fluid channel being formed between the outer side of the inner shell and the outer shell, the second fluid channel having a second water inlet, the second water inlet being arranged on the inner shell and connected to the first fluid channel, the inner shell being provided with a water spray outlet, the water spray outlet connecting the first fluid channel and the second fluid channel, the second fluid channel being provided with an impeller of the water pump described in the above technical solution, the impeller being driven by a driving member so that water flows from the second water inlet to the water spray outlet in the second fluid channel, and is sprayed into the first fluid channel through the water spray outlet.

[0024] The above-mentioned technical solution adopts an inner and outer dual-channel structure, wherein the first fluid channel is a non-powered area for accommodating the medium to be transported, such as fish; the second fluid channel is a powered area, where the water flow is accelerated by the impeller and then sprayed into the first fluid channel at high speed through the water nozzle. The jet creates negative pressure in the first flow channel, generating thrust, driving the medium to flow in the direction of water outlet, achieving "dynamic-to-static" contactless and efficient transportation, thereby effectively reducing mechanical damage to the medium to be transported. The impeller includes centrifugal blades and angled blades, which work together during rotation to accelerate the water flow in the second fluid channel and form a low-pressure area in this area, thereby attracting water in the first fluid channel to flow through the second water inlet provided on the inner shell and into the second fluid channel. Among them, the centrifugal blades extend radially, exerting a stable centrifugal force on the water flow, prompting the water flow to flow from the center to the periphery; and the inclined blades further guide the peripheral water flow to generate an axial component, so that the water flow converges to the water outlet more efficiently and sprays into the first fluid channel at high speed, which not only enhances the water absorption capacity and jet speed, but also significantly improves the negative pressure formation efficiency, thereby ensuring a good fish absorption effect and overall conveying performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Figure 1 Schematic diagram of the structure of the impeller of the water pump in the first embodiment of the present invention;

[0027] Figure 2 For the present invention Figure 1 A magnified view of the structure at center A;

[0028] Figure 3 This is a schematic structural diagram of the impeller of the water pump in the first embodiment of the present invention from another perspective;

[0029] Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0030] Figure 5 is a cross-sectional view of an impeller of a water pump in Embodiment 1 of the present invention;

[0031] Figure 6 This is a schematic structural diagram of a water pump in Embodiment 2 of the present invention;

[0032] Figure 7 For the present invention Figure 6 A magnified view of the structure at center C;

[0033] Figure 8 This is a schematic diagram of the partial structure of the water pump in the second embodiment of the present invention;

[0034] In the figure, 1. impeller; 10. annular impeller body; 20. blade group; 21. centrifugal blade; 211. straight section; 212. curved section; 213. fillet; 22. angled blade; 221. root; 222. end; 23. mounting seat; 24. flow channel; 25. reinforcing rib; 30. inner shell; 31. outer shell; 32. first fluid channel; 33. first water inlet; 34. first water outlet; 35. second fluid channel; 36. second water inlet; 37. water nozzle; 40. motor; 41. driving wheel; 42. transmission belt; 43. driven wheel; 44. bearing; 45. pressure wheel. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0036] The terms "first," "second," "third," "fourth," and so forth (if any) in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in sequences other than those illustrated or described herein.

[0037] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0038] It should be understood that in the present invention, "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0039] It should be understood that in the present invention, "plurality" refers to two or more. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent three situations: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "Including X, Y and Z" and "Including X, Y, Z" means that X, Y, and Z are all included. "Including X, Y or Z" means that one of X, Y, and Z is included. "Including X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0040] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0041] Example 1:

[0042] like Figures 1 to 5 As shown, the present invention provides an impeller for a water pump, comprising an annular impeller body 10, with a plurality of blade groups 20 arranged at intervals in the circumferential direction of the annular impeller body 10, each blade group 20 comprising a centrifugal blade 21 and a pitch blade 22, the surface of the centrifugal blade 21 extending along the axial direction of the annular impeller body 10, the centrifugal blade 21 being used to exert radial centrifugal force on the fluid, the surface of the pitch blade 22 being inclined relative to the rotation axis of the annular impeller body 10, the pitch blade 22 being used to guide the fluid to generate axial thrust, the centrifugal blade 21 and the pitch blade 22 being arranged crosswise in each blade group 20 to guide the fluid located at the center of the annular impeller body 10 to flow along its periphery and in the axial direction.

[0043] The centrifugal blades 21 extend axially along the annular impeller body 10, exerting a stable radial centrifugal force on the fluid, causing the water to flow from the center of the impeller 1 toward the periphery. The angled blades 22 are arranged at an angle relative to the rotational axis of the annular impeller body 10, guiding the fluid to generate axial thrust, encouraging the water to flow axially. The two blades are arranged crosswise within each blade assembly 20, forming a composite flow path structure, allowing the fluid to flow from the center to the periphery and axially within the impeller 1. This design not only improves the control accuracy of the water flow direction and more effectively matches the water flow to the pump structure, but is particularly beneficial for the injection requirements of the connecting ports in dual-channel pumps. Furthermore, the radial water flow generated by the centrifugal blades 21 does not remain in the flow channel 24 for a long time, but is promptly guided and discharged by the angled blades 22. This effectively reduces fluid separation, eddies, and turbulent flow, creating a more uniform and stable flow field, reducing energy loss, and avoiding splashing. Furthermore, this structure helps the impeller 1 maintain a 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 provided, arranged in a cross-shaped pattern perpendicular to each other. This structure evens out the mass distribution and stress state of the impeller 1 during high-speed rotation, effectively improving dynamic balancing performance and reducing vibration and noise caused by eccentric loading, thereby increasing operational stability and service life.

[0045] The blade assembly 20 also includes a mounting seat 23 extending toward the axis of the annular impeller body 10. The centrifugal blades 21 and the angled blades 22 are fixed to the mounting seat 23, ensuring more uniform force distribution on each blade, thereby improving the overall structural strength and fatigue resistance. The mounting seats 23 of adjacent blade assemblies 20 are spaced apart to form flow channels 24 for fluid passage. This helps improve pressure distribution within the impeller 1, reduces local pressure fluctuations, and allows fluid to flow smoothly into and out of the impeller 1 area, thereby effectively suppressing the generation of vortices, reducing energy loss, and improving the overall hydraulic performance of the water pump.

[0046] The centrifugal blades 21 and the angled blades 22 are subjected to large hydraulic loads during operation, especially in the root 221 area near the mounting seat 23, which is a stress concentration area. For this reason, in the present application, the centrifugal blades 21 and the angled blades 22 are arranged on one axial side of the annular impeller body 10, and a reinforcing rib 25 is provided at one end thereof near the mounting seat 23. This can significantly enhance the structural strength and load-bearing capacity of the blade root 221, effectively preventing fracture or plastic deformation caused by excessive local force, thereby improving the structural reliability and service life of the blade. The surface of the reinforcing rib 25 is streamlined, making it more consistent with the direction of fluid flow. Compared with the traditional right-angled or angular reinforcing rib 25 structure, the smooth and gradual streamlined surface enables the water flow to flow more smoothly along the surface of the reinforcing rib 25, reducing the possibility of boundary layer separation. At the same time, the streamlined design reduces local flow velocity mutations and pressure fluctuations, reducing energy loss and hydraulic noise caused by flow disturbances.

[0047] The centrifugal blades 21 and the angled blades 22 of the multiple blade assemblies 20 all have the same intersection angle. This helps achieve uniform distribution of the fluid in the flow channel 24, making the water flow more stable and symmetrical, thereby reducing local vortexes and energy losses and improving hydraulic performance. It also helps to evenly distribute the force on the entire impeller 1, avoiding vibration and unbalanced loading caused by structural asymmetry, and improving operational stability and service life.

[0048] Specifically, the centrifugal blades 21 of the multiple blade assemblies 20 are arranged radially tilted relative to the annular impeller body 10, resulting in a more uniform mass distribution across the entire impeller 1. This helps maintain a good dynamic balance during high-speed rotation, reduces vibration and noise, and improves operational stability. Furthermore, the tilted arrangement of the centrifugal blades 21 guides the fluid more smoothly as it exits the flow channel 24, minimizing fluid separation or eddy currents caused by sudden changes in flow direction, thereby reducing energy loss and improving overall hydraulic efficiency.

[0049] Furthermore, the edges of centrifugal blades 21 are provided with rounded corners 213. This structure enables a smoother transition of fluid as it flows over the blade edges, effectively preventing fluid separation and the generation of local vortices caused by sharp edges, thereby improving flow field distribution and reducing hydraulic losses. The rounded corners 213 face the water inlet direction, effectively reducing local resistance as the water enters flow channel 24.

[0050] The centrifugal blade 21 includes a straight section 211 and a curved section 212. The straight section 211 is the main working part of the centrifugal blade 21. Its structure parallel to the axis of rotation helps to exert a uniform and continuous radial centrifugal force on the fluid, ensuring that the water flow is stably transported from the center of the impeller 1 to the periphery as much as possible, thereby improving the transportation efficiency. The curved section 212 is set at the edge area of ​​the end 222 of the centrifugal blade 21, which can guide the fluid to flow out smoothly along the curved direction, avoid direct vertical splashing of the water flow, and effectively improve the stability and continuity of the flow. In addition, a smooth transition connection is adopted between the straight section 211 and the curved section 212, 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 of the pitch blade 22 relative to the radial direction is α. If the inlet angle α of the pitch blade 22 is less than 25°, the inlet direction of the pitch blade 22 is too close to the radial direction of the impeller 1, resulting in the fluid entry direction being inconsistent with the actual guide direction of the pitch blade 22, which is likely to produce large impact losses, affect the suction efficiency, and even cause local vortex phenomena; and when the inlet angle α is greater than 30°, the inlet of the pitch blade 22 is too inclined, which may cause the fluid flow path to become longer, increase resistance, and reduce hydraulic efficiency. For this reason, in this application, the inlet angle α of the pitch blade 22 is set within the range of 25° to 30°, so that the fluid can enter the flow channel 24 more smoothly, reduce the impact loss caused by inconsistent flow direction, and thus improve the suction efficiency. At the same time, this angle range helps to enhance the adhesion of water flow to the surface of the pitch blade 22, reduce boundary layer separation, and further improve hydraulic performance.

[0052] Furthermore, the outlet angle β of the angled blade 22 relative to the tangential direction is β. If the outlet angle β is less than 40°, the water discharge direction is more inclined toward the radial direction of the impeller 1, the axial component is insufficient, and it is difficult to form an effective jet velocity. When the outlet angle β exceeds 45°, the water discharge direction tends to be tangential, resulting in uneven flow field distribution, aggravated local pressure fluctuations, and easily causing vibration and noise, affecting the stability and reliability of the operation of the impeller 1. Therefore, in the present application, the outlet angle β of the angled blade 22 is set in the range of 40° to 45°, which is conducive to guiding the fluid out of the impeller 1 in a reasonable direction, enhancing the axial component of the water flow and the jet velocity, and increasing the kinetic energy intensity when ejected from the water outlet 37, thereby enhancing the negative pressure induction effect on the first fluid channel 32, ensuring the operation 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 flow channel 24 of the impeller 1, 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° and β is 42°. The annular impeller body 10 is provided with 12 blade assemblies 20, achieving a good match between the fluid inlet and outlet, while balancing suction efficiency, ejection capacity, and operational stability. The centrifugal blades 21 have a transverse length L1 of 10 mm and a longitudinal height L2 of 5 mm. The inner diameter of the annular blade body is L3 of 205.2 mm and the outer diameter of the annular blade body is L4 of 229.2 mm.

[0054] During the rotation of the impeller 1, there are differences in the linear velocity at different radii. The linear velocity in the root 221 area is lower but the pressure is higher, while the linear velocity in the outer edge area is higher and the pressure is relatively lower. For this reason, in the present application, the thickness of the angled blade 22 tends to gradually decrease from the root 221 to the end 222, which can better adapt to the flow characteristics. The root 221 of the angled blade 22 is used to be fixedly connected to the centrifugal blade 21. In the root 221 area, the thicker design of the angled blade 22 can provide sufficient structural strength to withstand higher pressure loads and effectively prevent fracture or fatigue damage caused by stress concentration as much as possible, thereby improving the reliability and service life of the overall structure; while in the end 222 area, the thickness of the angled blade 22 is reduced, which conforms to the high-speed and low-pressure flow environment, helps to reduce water flow resistance, reduces the risk of boundary layer separation, and makes the water flow more smoothly attached to the blade surface, thereby effectively suppressing the occurrence of adverse phenomena such as vortex, cavitation and splashing.

[0055] It is understandable that in other embodiments, the number and arrangement of centrifugal blades and angled blades are not limited to a cross-shaped arrangement, and can be set to multiple according to actual needs, and adopt different arrangements such as non-orthogonal angles, alternating arrangements or offset types, so as to meet the performance requirements of the water pump 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 arranged on the outside of the inner shell 30, the inner shell 30 is fixed to the outer shell 31, and a first fluid channel 32 is provided on the inner side of the inner shell 30, the first fluid channel 32 has a first water inlet 33 and a first water outlet 34, and 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 water inlet 36, the second water inlet 36 is arranged on the inner shell 30 and is connected to the first fluid channel 32, the inner shell 30 is provided with a water spray port 37, the water spray port 37 connects the first fluid channel 32 and the second fluid channel 35, and the second fluid channel 35 is provided with an impeller 1 of the water pump of the above technical solution, which is driven by a driving member so that water flows from the second water inlet 36 to the water spray port 37 in the second fluid channel 35, and is sprayed into the first fluid channel 32 through the water spray port 37.

[0058] The inner and outer double channel structure is adopted, wherein the first fluid channel 32 is a non-powered area for accommodating the medium to be transported, such as fish; the second fluid channel 35 is a powered area, and the water flow is accelerated by the impeller 1 and then is sprayed into the first fluid channel 32 at high speed through the water outlet 37, and the negative pressure is formed in the first fluid channel 32 by the jet flow to form a thrust force, so as to drive the medium to flow in the water outlet direction, and the non-contact high-efficiency transportation is realized by using the “power to drive static”, so as to effectively reduce the mechanical damage to the medium to be transported. The impeller 1 includes the centrifugal blade 21 and the inclined blade 22, which cooperates in the rotation process to drive the water flow in the second fluid channel 35 to accelerate and form a low-pressure area in the area, so as to attract the water flow in the first fluid channel 32 to enter the second fluid channel 35 through the second water inlet 36 arranged on the inner shell 30. Among them, the centrifugal blade 21 extends along the radial direction, and applies a stable centrifugal force to the water flow to make the water flow flow from the center of the centrifugal blade 21 to the outer periphery close to the inner shell 30; and the inclined blade 22 further guides the water flow at the outer periphery to generate an axial component force, so that the water flow is more efficiently gathered to the water outlet 37 and is sprayed into the first fluid channel 32 at high speed, which not only enhances the water suction capacity and the jet flow speed, but also significantly improves the negative pressure formation efficiency, so as to ensure good fish suction effect and overall transportation performance.

[0059] The annular impeller body 10 is rotatably connected to the outer pipe through the bearing 44, and the driving member drives the impeller 1 to rotate through the transmission assembly. The driving member is the motor 40, the transmission assembly includes the driving wheel 41, the driven wheel 43 and the transmission belt 42, the driving wheel 41 is fixed on the output shaft of the motor 40, the driven wheel 43 and the annular impeller body 10 are fixedly connected, the outer pipe is provided with an opening for the transmission belt 42 to be loaded, and the transmission belt 42 is used to connect the driven wheel 43 and the driving wheel 41 to transmit the power of the motor 40 to the annular impeller body 10 to drive the annular impeller body 10 to rotate. In order to improve the sealing performance, a sealing ring is further arranged between the annular impeller body 10 and the outer pipe. In order to make the transmission belt 42 always in tension state as far as possible, a pressing wheel 45 is further arranged, which is used to press the transmission belt 42 to ensure that the power of the motor 40 is more efficiently transmitted to the impeller 1.

[0060] In addition to the above preferred embodiments, the present application has other embodiments, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application belong to the scope of the present application.

Claims

1. An impeller for a water pump, characterized in that: The invention comprises an annular impeller body (10), wherein a plurality of blade groups (20) are arranged at intervals in the circumferential direction of the annular impeller body (10), and each blade group (20) comprises a centrifugal blade (21) and a pitch blade (22). The surface of the centrifugal blade (21) extends along the axial direction of the annular impeller body (10), and the centrifugal blade (21) is used to exert radial centrifugal force on the fluid. The surface of the pitch blade (22) is inclined relative to the rotation axis of the annular impeller body (10), and the pitch blade (22) is used to guide the fluid to generate axial thrust. The centrifugal blade (21) and the pitch blade (22) are arranged in a cross manner in each blade group (20) to guide the fluid located at the center of the annular impeller body (10) to flow along the outer periphery thereof and in the axial direction.

2. The impeller of the water pump according to claim 1, characterized in that: The centrifugal blade (21) comprises a straight section (211) and a curved section (212); the curved section (212) is arranged at an edge region of a terminal end (222) of the centrifugal blade (21); and a smooth transition occurs between the straight section (211) and the curved section (212).

3. The impeller of the water pump according to claim 2, characterized in that: The centrifugal blades (21) of the plurality of blade groups (20) are all arranged to be inclined with respect to the radial direction of the annular impeller body (10).

4. The impeller of the water pump according to claim 1, characterized in that: The edges of the centrifugal blades (21) are provided with rounded corners (213).

5. The impeller of the water pump according to claim 1, characterized in that: The inlet angle of the tilted blade (22) relative to the radial direction is α, 25°≤α≤30°, and the outlet angle of the tilted blade (22) relative to the radial direction is β, 40°≤β≤45°.

6. The impeller of the water pump according to claim 1, characterized in that: The thickness of the angled blade (22) decreases gradually from its root (221) toward its tip (222), and the root (221) of the angled blade (22) is used for fixed connection with the centrifugal blade (21).

7. The impeller of the water pump according to claim 1, characterized in that: The blade assembly (20) further comprises a mounting seat (23) extending in the axial direction of the annular impeller body (10); the centrifugal blades (21) and the pitch blades (22) are fixed on the mounting seat (23); and the mounting seats (23) of adjacent blade assemblies (20) are spaced apart to form a flow channel (24) for fluid to pass through.

8. The impeller of the water pump according to claim 7, characterized in that: The centrifugal blades (21) and the angled blades (22) are arranged on one axial side of the annular impeller body (10), and a reinforcing rib (25) is provided at one end thereof close to the mounting seat (23).

9. The impeller of the water pump according to claim 7, characterized in that: The intersection angles of the centrifugal blades (21) and the angled blades (22) of the plurality of blade groups (20) are all the same.

10. A water pump, characterized in that: The invention comprises an inner shell (30) and an outer shell (31) sleeved on the outer side of the inner shell (30), wherein the inner shell (30) is fixed to the outer shell (31), wherein a first fluid channel (32) is provided on the inner side of the inner shell (30), wherein the first fluid channel (32) has a first water inlet (33) and a first water outlet (34), and a second fluid channel (35) is formed between the outer side of the inner shell (30) and the outer shell (31), wherein the second fluid channel (35) has a second water inlet (36), wherein the second water inlet (36) is provided on the inner shell (30) and is connected to the outer shell (31). The first fluid channel (32) is connected, and the inner shell (30) is provided with a water spray port (37), and the water spray port (37) connects the first fluid channel (32) and the second fluid channel (35). The second fluid channel (35) is provided with an impeller (1) of a water pump according to any one of claims 1 to 9, and the impeller (1) is driven by a driving member so that water flows from the second water inlet (36) to the water spray port (37) in the second fluid channel (35), and is sprayed into the first fluid channel (32) through the water spray port (37).

Images