A dual-chamber inlet high-efficiency water turbine pump

Abstract

This invention discloses a dual-chamber inlet high-efficiency water turbine pump, comprising a pump casing, a central shaft, an isolation assembly, a drive impeller, and a lifting impeller. The pump casing includes a drive housing and a lifting housing. The drive housing has a power water inlet and a power water outlet, while the lifting housing has a lifting water inlet and a lifting water outlet. The central shaft is vertically oriented. The drive impeller is located within the drive chamber, and the lifting impeller is located within the lifting chamber. The lifting impeller rotates synchronously with the central shaft and pressurizes and discharges the water flowing into the lifting chamber from the lifting inlet. This invention, by setting an isolation assembly between the drive housing and the lifting housing, makes the drive chamber and the lifting chamber independent, reducing crossflow and interference between the power water and the lifting water flow. The drive impeller drives the lifting impeller to pressurize the water via the central shaft, and the movable guide vanes change their tilt angle and adjust the flow direction according to the power water, thereby effectively improving the water energy conversion efficiency, lifting head, and operational stability of the water turbine pump.

Description

Technical Field

[0001] This invention relates to the field of water turbine pumps, and more particularly to a dual-chamber inlet high-efficiency water turbine pump. Background Technology

[0002] A water turbine pump is a hydraulic water lifting device that uses the head and flow energy of water flow to drive the water turbine to rotate, and drives the water-lifting impeller through the transmission shaft to pressurize and transport water. It has the characteristics of not requiring external power, continuous operation and being suitable for low water head sources. It is widely used in farmland irrigation, mountain water supply and water energy recovery.

[0003] In existing technologies, some water turbine pumps adopt submerged or open inlet structures, where water flow typically enters the pump body irregularly from the periphery. This easily creates turbulence and eddies around the drive impeller, resulting in uneven force on the drive impeller, significant hydraulic losses, and affecting the efficiency of water energy conversion to mechanical energy. Simultaneously, the water flow and pressure between the drive section and the lifting section can easily influence each other, potentially leading to crossflow, pressure loss, or flow field disturbances during operation, thus affecting the stability of the lifting process. Furthermore, the existing drive impeller and lifting impeller flow channel structures are relatively simple, resulting in low water flow guidance and water energy conversion efficiency. Under low head conditions, insufficient drive impeller rotation power and low lifting head are likely to occur, thus affecting the water turbine pump's lifting efficiency and operational stability.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dual-chamber inlet high-efficiency water turbine pump with good water flow guidance effect, high water energy conversion efficiency and large water lifting head.

[0006] To achieve this objective, the present invention adopts the following technical solution: a dual-chamber inlet high-efficiency water turbine pump, comprising a pump casing, a central shaft, an isolation assembly, a drive impeller, and a lifting impeller; The pump housing includes a drive housing and a water-lifting housing. The water-lifting housing is located above the drive housing. A drive cavity is formed inside the drive housing, and a water-lifting cavity is formed inside the water-lifting housing. An isolation component is located between the drive cavity and the water-lifting cavity to isolate the drive cavity and the water-lifting cavity from each other. The drive housing is provided with a power water inlet and a power water outlet communicating with the drive cavity, and the water lifting housing is provided with a water lifting inlet and a water lifting outlet communicating with the water lifting cavity. The central shaft is vertically arranged and rotatably passes through the isolation assembly. The lower end of the central shaft extends into the drive cavity and the upper end extends into the water lifting cavity. The drive impeller is disposed in the drive cavity and connected to one end of the central shaft that extends into the drive cavity. The drive impeller is used to drive the central shaft to rotate when the power water enters the drive cavity from the power water inlet. The power water outlet is used to discharge the power water that has flowed through the drive impeller and completed its work from the drive cavity. The water-lifting impeller is located inside the water-lifting chamber and is connected to one end of the central shaft that extends into the water-lifting chamber. The water-lifting impeller is used to rotate synchronously with the central shaft and pressurize the water flow entering the water-lifting chamber from the water-lifting inlet so that the pressurized water flow is discharged from the water-lifting outlet.

[0007] Using the above technical solution, in the dual-cavity water inlet high-efficiency water turbine pump, the drive housing includes an annular volute and a drainage housing. An annular guide cavity is formed in the annular volute surrounding the central axis. The power water inlet is located at the side end of the annular volute and communicates with the annular guide cavity. The drainage housing is located at the bottom of the annular volute portion, and a drainage channel is formed inside the drainage housing. The upper end of the drainage channel is connected to the drive cavity, and the power water outlet is located at the lower end of the drainage housing and is connected to the drainage channel.

[0008] Using the above technical solution, in the dual-chamber water-inlet high-efficiency water turbine pump, at least two water-lifting impellers are provided, and the at least two water-lifting impellers are arranged axially at intervals along the central shaft and are respectively fixedly connected to the central shaft.

[0009] Using the above technical solution, in the dual-chamber water inlet high-efficiency water turbine pump, the water inlet is located at the side end of the water lifting shell, the water outlet is located at the top of the water lifting shell, the extension direction of the water inlet intersects the axial direction of the central axis, and the extension direction of the water outlet is consistent with the axial direction of the central axis.

[0010] Using the above technical solution, in the dual-chamber water-inlet high-efficiency water turbine pump, the isolation component includes a partition plate and a shaft seal. The partition plate is located between the drive housing and the water-lifting housing. The partition plate has a shaft hole for the central shaft to pass through. The shaft seal is located at the shaft hole and is sleeved on the outside of the central shaft to block the flow of water between the drive chamber and the water-lifting chamber.

[0011] Using the above technical solution, in the dual-chamber inlet high-efficiency water turbine pump, the drive chamber is provided with a follow-up flow guide assembly. The follow-up flow guide assembly includes several movable guide vanes and a guide vane shaft. The several movable guide vanes are arranged circumferentially around the drive impeller and are located between the annular flow guide chamber and the drive impeller. The guide vane shaft is located at the bottom of the movable guide vane. The guide vane shaft extends axially along the central axis and is rotatably disposed within the drive housing. A flow guiding gap is formed between two adjacent movable guide vanes. The movable guide vane is used to drive the guide vane shaft to rotate under the impact of the kinetic water, so as to change its tilt angle according to the flow state of the kinetic water.

[0012] Using the above technical solution, in the dual-chamber water-inlet high-efficiency water turbine pump, the follow-up flow guide assembly further includes several swing arms and several connecting rods; One end of each guide vane shaft is fixedly connected to one end of a swing arm, the other end of the swing arm is rotatably connected to one end of the corresponding connecting rod, and the other end of the connecting rod is rotatably connected to the drive housing.

[0013] In the above technical solution, the dual-chamber inlet high-efficiency water turbine pump is further provided with several fixed guide plates in the drive chamber; A plurality of fixed guide plates are circumferentially spaced around the central axis and located on the side of the plurality of movable guide vanes away from the drive impeller. A guide channel is formed between two adjacent fixed guide plates, and the guide channel is used to guide the kinetic water in the annular guide cavity to the space between the two adjacent movable guide vanes.

[0014] Using the above technical solution, in the dual-chamber inlet high-efficiency water turbine pump, the driving impeller includes an annular rim, a conical chassis, and several driving blades; The annular rim is located above the conical chassis, and the conical chassis gradually tilts upward from its outer periphery toward the central region. A plurality of the driving blades are circumferentially spaced between the annular rim and the conical chassis around the central axis. The bottom edge of the drive blade is connected to the conical chassis, and the end of the drive blade near the outer periphery of the conical chassis is connected to the inner peripheral wall of the annular rim. Several drive blades extend in the same circumferential arc from the outer periphery of the conical chassis toward the central region. A water passage is formed between two adjacent drive blades so that the power water changes its flow direction along the water passage and drives the drive impeller to rotate.

[0015] Using the above technical solution, in the dual-chamber water-inlet high-efficiency water turbine pump, the water-lifting impeller includes a central hub, an annular impeller disk, and several water-lifting blades. The central hub is located in the central area of ​​the annular impeller disk and is connected to the central shaft. The inner and outer circumferential sides of the annular impeller disk are offset along the central axis, with the inner circumferential side located above the outer circumferential side, so that the annular impeller disk gradually tilts upward from the outer circumferential side toward the inner circumferential side. The outer periphery of the annular impeller disk is provided with several water inlets spaced apart along its circumference, and the upper side of the water-lifting impeller is provided with a water outlet arranged around the central hub. Several water-lifting blades are arranged circumferentially around the central hub and extend from the outer periphery of the annular impeller towards the central hub. A water-lifting channel is formed between two adjacent water-lifting blades, connecting the inlet and the outlet, so that water flows into the water-lifting channel from the inlet, flows inward and upward along the annular impeller, and is discharged from the outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention isolates the drive chamber and the lifting chamber by setting an isolation component between the drive housing and the lifting housing. The driving water and the lifting water flow can flow independently in their respective chambers, reducing crossflow, pressure leakage, and pressure interference between the two water flows. After the driving water enters the drive chamber, it drives the drive impeller to rotate and, through the central shaft, drives the lifting impeller to pressurize the water flow in the lifting chamber, thereby effectively improving the lifting head and water energy transfer efficiency. At the same time, several movable guide vanes can change their tilt angle under the impact of the driving water to adjust the opening of the guide gap and the direction of the driving water entering the drive impeller, thereby reducing backflow, eddies, and localized concentrated impacts, making the circumferential force on the drive impeller more uniform, and effectively improving the water energy conversion efficiency and lifting stability of the dual-chamber water-inlet high-efficiency water turbine pump. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drive impeller mounting structure of the present invention; Figure 3 This is a schematic diagram of the installation structure of the follow-up flow guiding component of the present invention; Figure 4 This is a schematic diagram of the follow-up flow guiding component structure of the present invention; Figure 5 This is a schematic diagram of the drive impeller structure of the present invention; Figure 6 This is a schematic diagram of the water-lifting impeller structure of the present invention. Detailed Implementation

[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 6As shown, this embodiment of the invention provides a dual-chamber inlet high-efficiency water turbine pump, including a pump casing 1, a central shaft 2, an isolation assembly 3, a drive impeller 4, and a lifting impeller 5. The pump casing 1 includes a drive housing 11 and a lifting housing 12. The lifting housing 12 is located above the drive housing 11. The drive housing 11 has a drive cavity 110 inside, and the lifting housing 12 has a lifting cavity 120 inside. The isolation assembly 3 is located between the drive cavity 110 and the lifting cavity 120 to isolate the drive cavity 110 and the lifting cavity 120 from each other. With this arrangement, the drive housing 11 and the lifting housing 12 are arranged vertically. This design creates a drive chamber 110 and a lifting chamber 120 separated from each other inside the pump casing 1. During operation, the driving water can release its energy in the drive chamber 110, and the water to be lifted can be pressurized and transported in the lifting chamber 120, allowing the two water streams to flow in their respective chambers. The isolation component 3 is located between the drive chamber 110 and the lifting chamber 120, which can block the water exchange and pressure transmission between the two chambers, reduce crossflow, pressure loss and mutual disturbance of the flow field during operation, prevent hydraulic changes in the drive chamber 110 from affecting the pressurization process in the lifting chamber 120, and reduce the reverse pressure interference of the lifting chamber 120 on the operation of the drive chamber 110.

[0024] The drive housing 11 is provided with a power water inlet 111 and a power water outlet 112 communicating with the drive cavity 110. The water lifting housing 12 is provided with a water lifting inlet 121 and a water lifting outlet 122 communicating with the water lifting cavity 120. The central shaft 2 is arranged vertically and rotatably passes through the isolation assembly 3. The lower end of the central shaft 2 extends into the drive cavity 110 and the upper end extends into the water lifting cavity 120. The drive impeller 4 is disposed in the drive cavity 110 and connected to one end of the central shaft 2 that extends into the drive cavity 110. The drive impeller 4 is used to drive the power water into the drive cavity 110 through the power water inlet 111. The central shaft 2 rotates, and the power water outlet 112 is used to discharge the power water that has flowed through the drive impeller 4 and completed its work into the drive chamber 110. The water-lifting impeller 5 is located in the water-lifting chamber 120 and is connected to one end of the central shaft 2 that extends into the water-lifting chamber 120. The water-lifting impeller 5 is used to rotate synchronously with the central shaft 2 and pressurize the water flow that enters the water-lifting chamber 120 from the water-lifting inlet 121 so that the pressurized water flow is discharged from the water-lifting outlet 122. With this configuration, the power water enters the drive chamber 110 from the power water inlet 111 and acts on the drive impeller 4, causing the drive impeller 4 to convert the water energy carried by the power water into rotation. Mechanical energy is generated, driving the central shaft 2 connected to the drive impeller 4 to rotate. After completing the work, the kinetic water is discharged from the drive chamber 110 through the kinetic water outlet 112, thus forming a continuous kinetic water inlet and outlet process. The central shaft 2 is rotatably installed vertically through the isolation component 3, with its lower end extending into the drive chamber 110 and its upper end extending into the lifting chamber 120. This allows the rotational power generated by the drive impeller 4 to be transmitted to the lifting impeller 5 through the central shaft 2, reducing energy loss caused by additional transmission components and power transmission links. At the same time, the water to be lifted enters the lifting chamber 120 through the lifting inlet 121, and the lifting impeller 5 rotates synchronously with the central shaft 2, continuously performing work on the water entering the lifting chamber 120. After the water pressure is increased, it is discharged through the water lifting outlet 122, effectively increasing the water lifting head. The driving water and the water to be lifted enter the corresponding chambers through the driving water inlet 111 and the water lifting inlet 121, respectively, and are discharged through the driving water outlet 112 and the water lifting outlet 122, respectively. This allows the driving power process and the water lifting and pressurization process to be independent of each other, reducing the mixing, crossflow and pressure interference between the two water streams. At the same time, the driving impeller 4 and the water lifting impeller 5 are arranged coaxially, which can shorten the transmission path of rotational power, so that the rotational power obtained by the driving impeller 4 can act more directly on the water lifting impeller 5, which is conducive to improving the water energy conversion and transmission efficiency and enhancing the stability of the water pump in the continuous water lifting process.

[0025] like Figures 1 to 3As shown, the drive housing 11 further includes an annular volute portion 113 and a drain housing 114. An annular guide cavity 100 is formed within the annular volute portion 113, surrounding the central axis 2. The power water inlet 111 is located at the side end of the annular volute portion 113 and communicates with the annular guide cavity 100. The drain housing 114 is located at the bottom of the annular volute portion 113, and a drain channel 101 is formed within the drain housing 114. The upper end of the drain channel 101 communicates with the drive cavity 110, and the power water outlet 112 is located at the lower end of the drain housing 114 and communicates with the drain channel 101. With this configuration, power water enters the annular volute portion 113 through the power water inlet 111 and then... The water can flow circumferentially around the central axis 2 along the annular guide cavity 100, so that the power water is evenly delivered to the area where the drive impeller 4 is located. This reduces the local turbulence and energy loss caused by the power water directly entering the drive cavity 110, which is beneficial to improving the power water's work effect on the drive impeller 4. After completing the work, the power tailwater enters the drainage shell 114 downwards after releasing energy, and flows along the drainage channel 101 to the power water outlet 112 before being discharged. This allows the power water inlet process and the drainage process to take place in different areas, reducing the interference of the discharged water flow on the inlet flow field in the annular guide cavity 100, reducing the impact of water backflow and pressure fluctuations in the drive cavity 110 on the operation of the drive impeller 4, thereby improving the smoothness of the power water delivery process and the operational stability of the water turbine pump.

[0026] like Figure 1 As shown, further, at least two water-lifting impellers 5 are provided, and at least two water-lifting impellers 5 are arranged at intervals along the axial direction of the central shaft 2 and are respectively fixedly connected to the central shaft 2. This arrangement allows the central shaft 2 to drive multiple water-lifting impellers 5 to rotate synchronously when rotating, thereby increasing the output pressure of the water flow through a step-by-step pressurization method and enhancing the water-lifting capacity and output stability of the water turbine pump.

[0027] like Figure 1As shown, the water inlet 121 is located at the side end of the water lifting shell 12, and the water outlet 122 is located at the top of the water lifting shell 12. The extension direction of the water inlet 121 intersects the axial direction of the central axis 2, and the extension direction of the water outlet 122 is consistent with the axial direction of the central axis 2. With this configuration, the water to be lifted can enter the lifting chamber 120 from the lifting inlet 121 at the side end of the lifting housing 12 along the direction intersecting with the axial direction of the central axis 2. This allows the water to be transported laterally to the area where the lifting impeller 5 is located. Under the rotation of the lifting impeller 5, the water is pressurized. The pressurized water then flows upward along the axial direction of the central axis 2 and is discharged from the lifting outlet 122 at the top of the lifting housing 12. This creates a flow path within the lifting chamber 120 from lateral inlet to axial outlet, reducing mutual interference between the inlet and outlet water flows. It also facilitates the upward concentrated output of the pressurized water, which helps improve the smoothness of the lifting process.

[0028] like Figure 1 As shown, the isolation assembly 3 further includes a partition plate 31 and a shaft seal 32. The partition plate 31 is disposed between the drive housing 11 and the water lifting housing 12. The partition plate 31 has a shaft hole for the central shaft 2 to pass through. The shaft seal 32 is disposed at the shaft hole and sleeved on the outside of the central shaft 2 to block the flow of water between the drive cavity 110 and the water lifting cavity 120. The partition plate 31 can form an isolation structure between the drive housing 11 and the water lifting housing 12, so that the drive chamber 110 and the water lifting chamber 120 maintain relatively independent working spaces, reducing crossflow, mixing and pressure interference between the driving water and the water to be lifted; the shaft seal 32 is sleeved on the outside of the central shaft 2 and seals the gap between the central shaft 2 and the shaft hole, which can reduce water leakage along the periphery of the central shaft 2, thereby improving the sealing reliability between the drive chamber 110 and the water lifting chamber 120, avoiding water leakage or pressure loss from affecting the drive process and the water lifting and pressurization process, which is conducive to improving the water energy utilization efficiency and operational stability of the water turbine pump.

[0029] like Figures 2 to 4As shown, further, the drive cavity 110 is provided with a follow-up flow guide assembly 6. The follow-up flow guide assembly 6 includes a plurality of movable guide vanes 61 and a guide vane shaft 62. The plurality of movable guide vanes 61 are arranged circumferentially around the drive impeller 4 and are located between the annular flow guide cavity 100 and the drive impeller 4. The guide vane shaft 62 is located at the bottom of the movable guide vanes 61. The guide vane shaft 62 extends axially along the central axis 2 and is rotatably disposed within the drive housing 11. A flow guide gap is formed between two adjacent movable guide vanes 61. The movable guide vanes 61 are used to drive the guide vane shaft 62 to rotate under the impact of the kinetic water, so as to change its tilt angle according to the flow state of the kinetic water. With this configuration, when the kinetic water flows from the annular flow guide cavity 100 to the drive impeller 4, it first passes through the flow guide gap formed between two adjacent movable guide vanes 61. Under the impact of the kinetic water, the movable guide vanes 61 can drive the guide vane shaft 62. 2. The relative rotation of the drive housing 11 allows the tilt angle of the movable guide vane 61 to adjust automatically according to the changes in the velocity, pressure, and flow direction of the motive water. Specifically, when the velocity or impact of the motive water increases, the movable guide vane 61 can change the opening of the guide gap and the degree of water flow deflection by rotating, reducing the obstruction, backflow, and local eddy current phenomena caused by the frontal impact of the motive water on the movable guide vane 61, and avoiding the concentrated impact of the motive water on the local area of ​​the drive impeller 4, thereby allowing the motive water to act more evenly on the drive impeller 4 and improving the circumferential force uniformity of the drive impeller 4. When the velocity or flow direction of the motive water changes, the movable guide vane 61 can readjust its tilt angle with the water flow, allowing the motive water to enter the drive impeller 4 in the direction of the bending direction of the drive blade 43, reducing the directional deviation and impact loss when the motive water enters the drive impeller 4, thereby enhancing the driving effect of the motive water on the drive impeller 4, improving the water energy conversion efficiency and the operational stability of the drive impeller 4.

[0030] like Figure 4 As shown, the follow-up flow guide assembly 6 further includes several swing arms 63 and several connecting rods 64. One end of each guide vane shaft 62 is fixedly connected to one end of a swing arm 63, and the other end of the swing arm 63 is rotatably connected to one end of the corresponding connecting rod 64. The other end of the connecting rod 64 is rotatably connected to the drive housing 11. With this configuration, when the movable guide vane 61 drives the guide vane shaft 62 to rotate under the impact of the kinetic water, the guide vane shaft 62 synchronously drives the swing arm 63 to swing. The swing arm 63 then pushes or pulls the connecting rod 64 to rotate relative to the drive housing 11, so that the rotation process of the guide vane shaft 62 is constrained by the swing arm 63 and the connecting rod 64, thereby limiting the swing trajectory and tilt angle of the movable guide vane 61 and preventing the movable guide vane 61 from deflecting excessively.

[0031] like Figure 2 and Figure 3As shown, furthermore, the drive cavity 110 is also provided with a plurality of fixed guide plates 65. The plurality of fixed guide plates 65 are arranged circumferentially around the central axis 2 and are located on the side of the plurality of movable guide vanes 61 away from the drive impeller 4. A guide channel is formed between two adjacent fixed guide plates 65. The guide channel is used to guide the kinetic water in the annular guide cavity 100 to the space between two adjacent movable guide vanes 61. Before flowing to the movable guide vanes 61 and the drive impeller 4, the kinetic water in the annular guide cavity 100 first enters the guide channel formed between two adjacent fixed guide plates 65. The guide channel can divert and initially guide the kinetic water, reduce disorderly diffusion, mutual collision and local eddy currents of the kinetic water, so that the kinetic water flows more evenly to the periphery of the drive impeller 4, reduce local water flow concentration and impact deviation, and help improve the uniformity of force on the drive impeller 4, water energy conversion efficiency and operating stability.

[0032] like Figure 5 As shown, the driving impeller 4 further includes an annular rim 41, a conical base 42, and a plurality of driving blades 43; the annular rim 41 is disposed above the conical base 42, the conical base 42 gradually tilts upward from its outer periphery toward the central region, the plurality of driving blades 43 are circumferentially spaced between the annular rim 41 and the conical base 42 around the central axis 2, the bottom edge of the driving blades 43 is connected to the conical base 42, the end of the driving blades 43 near the outer periphery of the conical base 42 is connected to the inner periphery of the annular rim 41, the plurality of driving blades 43 extend in the same circumferential arc from the outer periphery of the conical base 42 toward the central region, and a water passage 40 is formed between two adjacent driving blades 43 so that the power water changes its flow direction along the water passage 40 and drives the driving impeller 4 to rotate; With this configuration, after the motive water enters the water passage 40 from the outer periphery of the drive impeller 4, the conical base 42 can guide the motive water by gradually tilting upwards from the outer periphery towards the central area. This allows the motive water to gradually change its flow direction as it flows towards the central area, reducing backflow and local eddy phenomena caused by direct impact of the water flow on the conical base 42 or disordered diffusion inside the drive impeller 4. Several drive blades 43 extend in the same circumferential arc from the outer periphery of the conical base 42 towards the central area, ensuring that each water passage 40 has a consistent curvature direction. This allows the motive water to continuously turn within the water passage 40 and fully transmits the impact of the motive water to the drive blades 43, thereby forming a stable rotational thrust in the circumference of the drive impeller 4. This effectively enhances the output torque and rotational stability of the drive impeller 4, which is beneficial for improving the water energy conversion effect of the water turbine pump under low head conditions.

[0033] like Figure 6As shown, the water-lifting impeller 5 further includes a central hub 51, an annular impeller disk 52, and a plurality of water-lifting blades 53. The central hub 51 is located in the central region of the annular impeller disk 52 and is connected to the central shaft 2. The inner and outer circumferential sides of the annular impeller disk 52 are offset along the axial direction of the central shaft 2, with the inner circumferential side located above the outer circumferential side, so that the annular impeller disk 52 gradually tilts upward from the outer circumferential side towards the inner circumferential side. The outer circumferential side of the annular impeller disk 52 is provided with a plurality of water inlets 50 spaced apart along its circumference. The upper side of the water-lifting impeller 5 is provided with a water outlet surrounding the central hub 51. The plurality of water-lifting blades 53 are spaced apart circumferentially around the central hub 51 and extend and bend from the outer circumferential side of the annular impeller disk 52 towards the central hub 51. A water-lifting channel 500 is formed between two adjacent water-lifting blades 53, connecting the water inlet 50 and the water outlet, so that the water flow is... The water enters the water-lifting channel 500 through the inlet 50, flows inward and upward along the annular impeller disk 52, and is discharged through the outlet. This arrangement allows water to enter the water-lifting channel 500 simultaneously through multiple inlets 50, thereby increasing the water inlet area of ​​the impeller 5 and ensuring that the water enters evenly from different circumferential positions. This reduces problems such as excessively high local flow velocity, increased water inlet resistance, or uneven force on the impeller 5 caused by unilateral water inlet. When the lifting blades 53 rotate with the central shaft 2, they can... The water flow within 500 exerts a force, causing the rotational mechanical energy input by the central shaft 2 to be gradually converted into the pressure energy of the water flow. The annular impeller disk 52 gradually tilts upward from the outer circumference to the inner circumference and cooperates with the curved and extended water-lifting blades 53, which can cause the water flow entering the water-lifting channel 500 to converge inward along a predetermined path and gradually turn upward, thereby giving the water flow higher pressure energy. The pressurized water flow is then concentrated and discharged from the outlet on the upper side of the water-lifting impeller 5, thereby effectively increasing the water lifting head and outlet pressure.

[0034] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-chamber inlet high-efficiency water turbine pump, characterized in that: Includes pump casing, central shaft, isolation assembly, drive impeller, and lifting impeller; The pump housing includes a drive housing and a water-lifting housing. The water-lifting housing is located above the drive housing. A drive cavity is formed inside the drive housing, and a water-lifting cavity is formed inside the water-lifting housing. An isolation component is located between the drive cavity and the water-lifting cavity to isolate the drive cavity and the water-lifting cavity from each other. The drive housing is provided with a power water inlet and a power water outlet communicating with the drive cavity, and the water lifting housing is provided with a water lifting inlet and a water lifting outlet communicating with the water lifting cavity. The central shaft is vertically arranged and rotatably passes through the isolation assembly. The lower end of the central shaft extends into the drive cavity and the upper end extends into the water lifting cavity. The drive impeller is disposed in the drive cavity and connected to one end of the central shaft that extends into the drive cavity. The drive impeller is used to drive the central shaft to rotate when the power water enters the drive cavity from the power water inlet. The power water outlet is used to discharge the power water that has flowed through the drive impeller and completed its work from the drive cavity. The water-lifting impeller is located inside the water-lifting chamber and is connected to one end of the central shaft that extends into the water-lifting chamber. The water-lifting impeller is used to rotate synchronously with the central shaft and pressurize the water flow entering the water-lifting chamber from the water-lifting inlet so that the pressurized water flow is discharged from the water-lifting outlet.

2. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: The drive housing includes an annular volute and a drainage housing. An annular guide cavity is formed in the annular volute surrounding the central axis. The power water inlet is located at the side end of the annular volute and communicates with the annular guide cavity. The drainage housing is located at the bottom of the annular volute portion, and a drainage channel is formed inside the drainage housing. The upper end of the drainage channel is connected to the drive cavity, and the power water outlet is located at the lower end of the drainage housing and is connected to the drainage channel.

3. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: At least two water-lifting impellers are provided, and the at least two water-lifting impellers are arranged at axial intervals along the central shaft and are respectively fixedly connected to the central shaft.

4. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: The water inlet is located at the side end of the water lifting shell, and the water outlet is located at the top of the water lifting shell. The extension direction of the water inlet intersects the axial direction of the central axis, and the extension direction of the water outlet is consistent with the axial direction of the central axis.

5. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: The isolation assembly includes a partition plate and a shaft seal. The partition plate is located between the drive housing and the water-lifting housing. The partition plate has a shaft hole through which the central shaft passes. The shaft seal is located at the shaft hole and is sleeved on the outside of the central shaft to block the flow of water between the drive chamber and the water-lifting chamber.

6. The dual-chamber inlet high-efficiency water turbine pump according to claim 2, characterized in that: The drive cavity is provided with a follow-up flow guide assembly, which includes a plurality of movable guide vanes and a guide vane shaft. The plurality of movable guide vanes are arranged circumferentially around the drive impeller and are located between the annular flow guide cavity and the drive impeller. The guide vane shaft is located at the bottom of the movable guide vane. The guide vane shaft extends axially along the central axis and is rotatably disposed within the drive housing. A flow guiding gap is formed between two adjacent movable guide vanes. The movable guide vane is used to drive the guide vane shaft to rotate under the impact of the kinetic water, so as to change its tilt angle according to the flow state of the kinetic water.

7. The dual-chamber inlet high-efficiency water turbine pump according to claim 6, characterized in that: The follow-up flow guide assembly also includes several swing arms and several connecting rods; One end of each guide vane shaft is fixedly connected to one end of a swing arm, the other end of the swing arm is rotatably connected to one end of the corresponding connecting rod, and the other end of the connecting rod is rotatably connected to the drive housing.

8. The dual-chamber inlet high-efficiency water turbine pump according to claim 6, characterized in that: The drive cavity is also provided with several fixed guide plates; A plurality of fixed guide plates are circumferentially spaced around the central axis and located on the side of the plurality of movable guide vanes away from the drive impeller. A guide channel is formed between two adjacent fixed guide plates, and the guide channel is used to guide the kinetic water in the annular guide cavity to the space between the two adjacent movable guide vanes.

9. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: The drive impeller includes an annular rim, a conical base, and several drive blades; The annular rim is located above the conical chassis, and the conical chassis gradually tilts upward from its outer periphery toward the central region. A plurality of the driving blades are circumferentially spaced between the annular rim and the conical chassis around the central axis. The bottom edge of the drive blade is connected to the conical chassis, and the end of the drive blade near the outer periphery of the conical chassis is connected to the inner peripheral wall of the annular rim. Several drive blades extend in the same circumferential arc from the outer periphery of the conical chassis toward the central region. A water passage is formed between two adjacent drive blades so that the power water changes its flow direction along the water passage and drives the drive impeller to rotate.

10. The dual-chamber inlet high-efficiency water turbine pump according to claim 1, characterized in that: The water-lifting impeller includes a central hub, an annular impeller disk, and several water-lifting blades. The central hub is located in the central region of the annular impeller disk and is connected to the central shaft. The inner and outer circumferential sides of the annular impeller disk are offset along the central axis, with the inner circumferential side located above the outer circumferential side, so that the annular impeller disk gradually tilts upward from the outer circumferential side toward the inner circumferential side. The outer periphery of the annular impeller disk is provided with several water inlets spaced apart along its circumference, and the upper side of the water-lifting impeller is provided with a water outlet arranged around the central hub. Several water-lifting blades are arranged circumferentially around the central hub and extend from the outer periphery of the annular impeller towards the central hub. A water-lifting channel is formed between two adjacent water-lifting blades, connecting the inlet and the outlet, so that water flows into the water-lifting channel from the inlet, flows inward and upward along the annular impeller, and is discharged from the outlet.

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