A new type of submersible pump

Abstract

The utility model discloses a novel submersible pump belongs to submersible pump field, a novel submersible pump, including drive assembly, connecting piece, support, pump cylinder, shaft coupling, pump shaft, impeller, guide vane, flat valve and water outlet section, and drive assembly and pump cylinder are connected through connecting piece, and connecting piece has a plurality of mesh, and support and flat valve are all installed in pump cylinder, and a plurality of upper and lower interval distribution's impellers are arranged between support and flat valve, and the output of drive assembly is connected with pump shaft through shaft coupling, and impeller is fixed to pump shaft, and pump shaft passes through support, and inserts flat valve, and every impeller outside all sets up a guide vane, and impeller can rotate relative to guide vane, and water outlet section is sealedly connected in pump cylinder, and is located the top of flat valve. The utility model realizes high -efficient distribution, promotes output flow and lift, reduces energy consumption, pressure pulsation, vibration and noise.

Description

Technical Field

[0001] This utility model belongs to the field of submersible pumps, and in particular relates to a novel submersible pump. Background Technology

[0002] In modern industry and various production and daily life scenarios, the requirements for water pump performance are becoming increasingly stringent, and efficient operation under high-speed conditions has become a key requirement. Traditional water pumps have revealed many insurmountable problems when faced with high-speed operation.

[0003] In terms of flow distribution, the flow distribution structure of conventional water pumps is difficult to adapt to the high-speed fluid impact brought about by high rotational speeds. Their flow channel design often fails to accurately guide the water flow, resulting in turbulent flow and significant energy loss at high speeds, making efficient flow distribution impossible. This not only reduces the actual output flow rate of the water pump but also makes it difficult for the pump to achieve the expected head when operating at high speeds.

[0004] Furthermore, when traditional water pumps operate at high speeds, improper flow distribution can trigger a series of other negative effects. For example, irregular water flow can lead to uneven pressure distribution within the pump body, generating significant pressure pulsations. This not only accelerates wear on the pump body and internal components, reducing its lifespan, but can also cause strong vibrations and noise, interfering with the surrounding working environment. Simultaneously, inefficient flow distribution at high speeds can significantly increase the pump's energy consumption, contradicting current energy conservation and emission reduction principles and increasing operating costs.

[0005] Given the problems of low flow distribution efficiency of traditional water pumps under high-speed conditions, there is an urgent need to innovate the design of existing water pumps so that they can achieve efficient flow distribution when operating at high speeds. Utility Model Content

[0006] The purpose of this invention is to propose a new type of submersible pump to overcome at least one of the above-mentioned defects in the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model provides a novel submersible pump, comprising a drive assembly, a connector, a support, a pump casing, a coupling, a pump shaft, impellers, guide vanes, a flat valve, and an outlet section. The drive assembly and the pump casing are connected by the connector, which has several mesh openings. The support and the flat valve are both installed inside the pump casing. Several impellers are arranged at vertical intervals between the support and the flat valve. The output end of the drive assembly is connected to the pump shaft via the coupling. The impellers are fixed to the pump shaft, which passes through the support and is inserted into the flat valve. Each impeller is fitted with a guide vane, and the impeller can rotate relative to the guide vane. The outlet section is sealed to the pump casing and is located above the flat valve.

[0009] Preferably, it further includes an upper bushing, a first rubber bushing, a lower bushing, a second rubber bushing, a first gasket, and a second gasket. The first rubber bushing is fixed to the valve seat of the flat valve. The upper bushing is rotatably connected to the middle of the first rubber bushing. The top end of the pump shaft is inserted into the upper bushing and fixedly connected to it. The second rubber bushing is fixed to the support. The lower bushing is rotatably connected to the middle of the second rubber bushing. The pump shaft passes through the lower bushing and through the guide vane. A first gasket is provided after each guide vane. The uppermost first gasket... The distance between the top surface of the plate and the bottom surface of the upper shaft sleeve is 1.5-2.5mm. The pump shaft between the lower shaft sleeve and the coupling, and between the lower shaft sleeve and the impeller above it, is provided with a second gasket. The pump shaft is an external hexagonal shaft. The upper shaft sleeve, lower shaft sleeve, first gasket, second gasket, and impeller all have internal hexagonal holes that mate with the external hexagonal shaft. The top of the coupling has an internal hexagonal groove that mates with the external hexagonal shaft. The output end of the drive assembly has an involute external spline, and the bottom end of the coupling has an involute internal spline that mates with the involute external spline.

[0010] Preferably, the impeller includes a hub, a first cover plate, a second cover plate, first arc-shaped blades, and a guide ring. The first cover plate is fixed to the hub. Several first arc-shaped blades are fixed at the bottom of the first cover plate and spaced apart along the circumference of the hub. The bottom of the first arc-shaped blades is fixed to the second cover plate. A first flow channel is formed between the first cover plate, the second cover plate, and adjacent first arc-shaped blades. The second cover plate has a first through hole in the middle, which communicates with the first flow channel. The bottom of the second cover plate has a guide ring that communicates with the first through hole.

[0011] Preferably, the guide vane includes a base plate, a first ring seat, a second arc-shaped blade, a third arc-shaped blade, and a cover. A plurality of second arc-shaped blades are fixedly attached to the base plate along its circumference. The second arc-shaped blades extend from the base plate. The outer ends of the plurality of second arc-shaped blades are fixedly connected to the inner sidewall of the first ring seat. A channel is formed between adjacent second arc-shaped blades and the first ring seat. The base plate has a second through hole in its middle. A plurality of third arc-shaped blades are fixedly attached to the top of the base plate and spaced apart along the circumference of the second through hole. A second flow channel is formed between the base plate and adjacent third arc-shaped blades. The second flow channel communicates with the channel. A cover is formed by extending the sidewall of each third arc-shaped blade. The outer sidewall of the cover is connected to the inner sidewall of the first ring seat and is located above the channel.

[0012] Preferably, it also includes a third cover plate. A third cover plate is provided below each guide ring. The third cover plate has a third through hole in the middle. The third through hole communicates with the guide ring. The support includes a base, a flow divider, and a second ring seat. A number of flow dividers are arranged at intervals along the outer sidewall of the base. The outer ends of the flow dividers are fixedly connected to the inner sidewall of the second ring seat. A flow divider space is formed between the base, the second ring seat, and the adjacent flow dividers. The flow divider space communicates with the third through hole. The third cover plate located between the impeller and the guide vane blocks part of the top opening of the second flow channel. The third cover plate located between the impeller and the support blocks the top opening of the flow divider space.

[0013] Preferably, the impeller has an outlet width of 5.2 mm, an outlet diameter of 60 mm, an outlet installation angle of 30° for the first arc-shaped blade, a wrap angle of 215° for the first arc-shaped blade, a base circle diameter of 65 mm for the guide vane, an inlet width of 14 mm for the second arc-shaped blade, an outlet diameter of 85 mm for the second arc-shaped blade, an inlet placement angle of 35° for the second arc-shaped blade, an inlet diameter of 82 mm for the third arc-shaped blade, an outlet diameter of 79 mm for the third arc-shaped blade, an axial width of 20 mm for the third arc-shaped blade, an inlet placement angle of 24° for the third arc-shaped blade, an outlet placement angle of 90° for the third arc-shaped blade, and a number of 6 second and third arc-shaped blades.

[0014] Preferably, the drive assembly includes a barrel, a lower bearing housing, a first rubber bearing, a cable, a stator, a rotor, an upper bearing housing, a second rubber bearing, and a first mechanical seal structure. The upper bearing housing, the stator, and the lower bearing housing are fixed inside the barrel from top to bottom. The first rubber bearing is installed in the middle of the upper bearing housing, and the second rubber bearing is installed in the middle of the lower bearing housing. The bottom end of the rotor is inserted into the second rubber bearing, and the top end of the rotor passes through the stator and the first rubber bearing to connect with the coupling. A first mechanical seal structure is provided between the interior of the upper bearing housing and the upper part of the rotor. The cable is connected to the stator.

[0015] Preferably, the drive assembly further includes a sealing screw, a first sealing ring, a second sealing ring, insulating oil, an oil bladder, and a bottom cover. The lower part of the barrel is fixed with an oil bladder, and the lower part of the oil bladder is provided with a bottom cover. The bottom cover has a vent hole. The top of the upper bearing seat has an oil injection hole, and a sealing screw is provided in the oil injection hole. A first sealing ring is provided between the sealing screw and the oil injection hole. A second sealing ring is provided between the upper bearing seat and the barrel. The lower bearing seat has a fourth through hole. A sealed space is formed between the upper bearing seat, the barrel, and the oil bladder, and the sealed space is filled with insulating oil.

[0016] Preferably, the connecting component includes a connecting seat, a mesh ring, a cylinder cover, a sand guard, and a second mechanical seal structure. The upper end of the connecting seat is screwed to the lower part of the pump barrel, and the lower end of the connecting seat is fixed to the upper bearing seat. A cylinder cover is provided between the upper bearing seat and the connecting seat. The mesh ring is sleeved on the connecting seat, and several mesh holes are distributed at intervals along the circumference of the mesh ring. The sand guard is fixed to the top of the upper bearing seat, and the rotor passes through the top wall of the sand guard. A second mechanical seal structure is provided between the inside of the sand guard and the upper part of the rotor.

[0017] Preferably, it also includes a protective sleeve and a sealing sleeve. The protective sleeve is disposed on the outer wall of the pump barrel and the connector and communicates with the internal space of the connector. The upper bearing seat has a through hole. The cable passes through the protective sleeve and extends into the interior of the connector, and passes through the through hole to connect with the stator. A sealing sleeve is provided between the cable and the through hole.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The new submersible pump overcomes the high-speed flow distribution problem of traditional water pumps by working together with components such as impellers, guide vanes, and flat valves. It achieves efficient flow distribution, increases output flow and head, and reduces energy consumption, pressure pulsation, vibration and noise. Its components are stably connected and have a compact and reasonable layout, which not only extends service life and improves the working environment, but also conforms to energy conservation and emission reduction, thus achieving both economic and social benefits.

[0020] 2. The combination of upper shaft sleeve, first rubber shaft sleeve, lower shaft sleeve, and second rubber shaft sleeve, along with the gasket settings, enhances the stability of pump shaft rotation, reduces vibration and wear, lowers wear and maintenance costs, strictly limits the spacing to improve volumetric efficiency, and ensures stable power transmission by connecting hexagonal and involute splines, guaranteeing accurate impeller speed and relative position, achieving efficient flow distribution, and improving system reliability and stability.

[0021] 3. The first arc-shaped blade precisely guides the water flow, reducing turbulence and energy loss. The first flow channel formed by the first cover plate, the second cover plate and the first arc-shaped blade optimizes the water flow path. The first through hole ensures a smooth transition of water flow. The combination of components such as the hub enhances the structural strength and stability of the impeller, comprehensively improving the hydraulic performance, operational stability and reliability of the submersible pump.

[0022] 4. The first ring seat and the second arc-shaped blades guide the water flow thrown out by the impeller. The continuous channel and the second flow channel design improve the water flow transition efficiency. The base plate and other components are connected into a stable structure. The cover restricts the water flow, which together improves the hydraulic performance, flow rate and head efficiency of the water pump, and ensures the stable operation and efficient flow distribution of the submersible pump.

[0023] 5. The third cover plate is connected to the guide ring and the diversion space, which guides and evenly distributes the water flow, constrains the water flow path, prevents water overflow, improves energy conversion efficiency and pump performance, and also provides structural support for the internal structure of the submersible pump, enhancing its integrity, stability and extending its service life.

[0024] 6. By setting the impeller outlet width to 5.2mm and the outlet diameter to 60mm, selecting a 30° first arc blade outlet installation angle and a 215° wrap angle, and comprehensively considering factors such as dust permeability, the flow resistance is reduced, the flow channel diffusion is avoided, and the diffusion loss is reduced, thereby improving the efficiency, head, and overall performance of the submersible pump under different operating conditions.

[0025] 7. Reasonably set the parameters of the guide vanes, determining the base circle diameter of the guide vanes to be 65mm, precisely matching the impeller outlet diameter, ensuring that the radial clearance between the impeller and the guide vanes does not exceed 5mm, achieving a smooth liquid transition; the inlet width of the second arc-shaped blade is set to 14mm, the outlet diameter to 85mm, and the inlet placement angle to 35°, with 6 second arc-shaped blades; the inlet diameter of the third arc-shaped blade is 82mm, the outlet diameter to 79mm, the axial width to 20mm, the inlet placement angle to 24°, and the outlet placement angle to 90°, with 6 third arc-shaped blades as well. This improves the guide vane's flow guidance and energy conversion efficiency, ensures stable operation of the submersible pump, optimizes the pump body structure, and saves costs.

[0026] 8. The upper and lower bearing housings are precisely positioned and reliably supported by the first and second rubber bearings, respectively, to ensure smooth high-speed rotation of the rotor, reduce vibration and deviation. The rubber bearings can also absorb vibration and impact, extend component life, and reduce noise. The first mechanical seal structure effectively prevents insulating oil leakage and impurities from entering, protects key components, and improves the reliability and stability of the drive assembly.

[0027] 9. The second sealing ring between the upper bearing housing and the barrel, and the sealing screw and the first sealing ring at the oil injection hole ensure the sealing of the sealing space and prevent the leakage of insulating oil and the entry of impurities. The insulating oil in the sealing space formed by the upper bearing housing, the barrel and the oil bladder provides an insulating and heat dissipation environment. The oil bladder and the bottom cover breather work together to maintain pressure balance under different working conditions and ensure the safe and stable operation of the drive components.

[0028] 10. The connecting seat securely connects the pump barrel and drive components, withstanding external forces to ensure equipment stability; the mesh ring filters impurities and ensures uniform water intake; the sand cover blocks external impurities; the second mechanical seal structure strengthens the seal; the first and second mechanical seal structures work together to reduce energy consumption and balance axial pressure; the cylinder cover protects the connection parts, comprehensively improving the operational reliability of the submersible pump, adapting to complex environments, and extending its service life.

[0029] 11. The protective sleeve provides physical protection for the cable, guides its orderly wiring, improves the operability and reliability of the submersible pump system, and the sealing sleeve and protective sleeve form a multi-layer waterproof sealing system to prevent water from damaging electrical components, ensure the normal operation of drive components and extend the service life of the cable. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0031] Figure 2 This is a partial three-dimensional exploded structural diagram of Embodiment 1 of this utility model.

[0032] Figure 3 This is a top view of the structure of Embodiment 1 of this utility model.

[0033] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0034] Figure 5 This is a three-dimensional exploded structural diagram of the upper bushing, first rubber bushing, lower bushing, second rubber bushing, first gasket, second gasket, support, flat valve, and pump shaft of Embodiment 1 of this utility model.

[0035] Figure 6 This is a three-dimensional exploded structural diagram of the coupling and rotor of Embodiment 1 of this utility model.

[0036] Figure 7 This is a three-dimensional exploded structural diagram of the coupling and pump shaft according to Embodiment 1 of this utility model.

[0037] Figure 8 This is a three-dimensional structural schematic diagram (first perspective) of the impeller in Embodiment 1 of this utility model.

[0038] Figure 9 This is a three-dimensional structural schematic diagram (second perspective) of the impeller in Embodiment 1 of this utility model.

[0039] Figure 10 This is a three-dimensional structural schematic diagram (first perspective) of the guide vane in Embodiment 1 of this utility model.

[0040] Figure 11 This is a three-dimensional structural schematic diagram (second perspective) of the guide vane in Embodiment 1 of this utility model.

[0041] Figure 12 This is a three-dimensional structural diagram of a support according to an embodiment of the present utility model.

[0042] Figure 13 This is a three-dimensional exploded structural diagram of the driving component of Embodiment 1 of this utility model.

[0043] Figure 14 This is a three-dimensional structural schematic diagram of the bearing housing according to an embodiment of the present invention.

[0044] Figure 15 This is a three-dimensional structural diagram of the connector and protective sleeve according to Embodiment 1 of this utility model.

[0045] The labels in the attached diagram are as follows: 1-Pump barrel, 2-Pump shaft, 3-Flat plate valve, 4-Outlet section, 5-Drive assembly, 6-Connector, 7-Support, 8-Impeller, 9-Guide vane, 10-Coupling, 621-Mesh, 11-Upper bushing, 12-First rubber bushing, 14-Lower bushing, 15-Second rubber bushing, 16-First gasket, 17-Second gasket, 18-Internal hexagonal hole, 101-Internal hexagonal groove, 561-Involute external spline, 102-Involute internal spline, 81-Hub, 82-First cover plate, 83-Second cover plate, 84-First arc-shaped blade, 85-Guide ring, 86-First flow channel, 87-First through hole, 91-Base plate, 92-First ring seat, 93-Second arc-shaped blade, 94-Third arc-shaped blade, 95-Cover, 96-Channel, 97- Second through hole, 98-Second flow channel, 19-Third cover plate, 20-Third through hole, 71-Base, 72-Diverter plate, 73-Second ring seat, 74-Diverter space, 51-Barrel, 52-Lower bearing seat, 53-First rubber bearing, 54-Cable, 55-Stator, 56-Rotor, 57-Upper bearing seat, 58-Second rubber bearing, 59-First mechanical seal structure, 510-Sealing screw, 511-First sealing ring, 512-Second sealing ring, 513-Insulating oil, 514-Oil bladder, 515-Bottom cover, 516-Breath hole, 517-Oil injection hole, 518-Fourth through hole, 61-Connecting seat, 62-Net ring, 63-Cylinder cover, 64-Sand guard, 65-Second mechanical seal structure, 21-Protective sleeve, 22-Sealing sleeve, 519-Perforation. Detailed Implementation

[0046] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0047] Contents not described in detail in this specification are existing technologies known to those skilled in the art. In the description of this utility model, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They 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 limiting this utility model. Furthermore, terms such as "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] Example 1:

[0049] like Figures 1 to 15As shown, this embodiment provides a novel submersible pump, including a drive assembly 5, a connector 6, a support 7, a pump barrel 1, a coupling 10, a pump shaft 2, impellers 8, guide vanes 9, a flat valve 3, and an outlet section 4. The drive assembly 5 and the pump barrel 1 are connected by the connector 6, which has several mesh holes 621. The support 7 and the flat valve 3 are both installed inside the pump barrel 1. Several impellers 8 are arranged at vertical intervals between the support 7 and the flat valve 3. The output end of the drive assembly 5 is connected to the pump shaft 2 through the coupling 10. The impellers 8 are fixed to the pump shaft 2. The pump shaft 2 passes through the support 7 and is inserted into the flat valve 3. Each impeller 8 is fitted with a guide vane 9, and the impeller 8 can rotate relative to the guide vane 9. The outlet section 4 is threadedly sealed to the pump barrel 1 and is located above the flat valve 3.

[0050] When the drive assembly 5 is started, the working process is as follows: Liquid flows into the submersible pump through the mesh 621 on the connector 6. The drive assembly 5 operates, driving the first impeller 8 to rotate at high speed. During this process, the liquid is pushed and accelerated by the impeller 8, and its kinetic energy increases significantly. The accelerated liquid then enters the corresponding guide vane 9. The guide vane 9 plays a key role in effectively converting the kinetic energy of the liquid into hydraulic potential energy, allowing the liquid to be evenly guided into the next stage (i.e., the second stage) impeller 8 in a more orderly and stable state.

[0051] In the subsequent workflow, the liquid is repeatedly accelerated on the impeller 8 and undergoes energy conversion at the guide vane 9. In this embodiment, there are six impellers 8 and six guide vanes 9. As the liquid flows through each stage of impeller 8 and guide vane 9 in sequence, its energy continuously increases until the predetermined head requirement is reached. At this point, the liquid is discharged through the flat plate valve 3 and the outlet section 4 at the outlet.

[0052] Through the coordinated operation of components such as impeller 8, guide vanes 9, and flat plate valve 3, this new submersible pump can better cope with the high-speed fluid impact caused by high rotational speeds compared to traditional water pumps. The pump shaft 2 drives the impeller 8 to rotate, the guide vanes 9 precisely guide the water flow, and the unique design of the flat plate valve 3 further optimizes the flow distribution effect. During opening and closing, the valve plate of the flat plate valve 3 can smoothly control the flow and regulate the flow rate, reducing resistance when the water flows through. Combined with the impeller 8 and guide vanes 9, this ensures that the water flow remains relatively regular even at high speeds, avoiding turbulence and achieving efficient flow distribution. This successfully overcomes the technical bottleneck of traditional water pump flow distribution structures being unable to adapt to high rotational speeds, solves the problems of inaccurate water flow guidance and high energy loss, and significantly improves the actual output flow rate and head of the water pump.

[0053] A well-designed flow distribution structure prevents irregular water flow, resulting in a more uniform pressure distribution within the pump body and effectively reducing pressure pulsation. The flat valve 3 plays a crucial role in this process; its smooth valve plate allows for stable water flow during operation, reducing the impact of the water flow on the valve seat and surrounding components, thereby minimizing pressure fluctuations. This not only reduces wear on the pump body and internal components, extending the pump's service life, but also significantly reduces the strong vibrations and noise caused by pressure pulsation, greatly improving the quality of the surrounding working environment and minimizing adverse effects on workers and surrounding equipment.

[0054] The efficient flow distribution significantly reduces energy consumption of the water pump when it operates at high speed. The low resistance of the flat plate valve 3 reduces energy loss when water flows through it, changing the situation where inefficient flow distribution at high speeds of traditional water pumps leads to increased energy consumption. This aligns with the current development concept of energy conservation and emission reduction, significantly reduces operating costs, brings better economic benefits to enterprises, and also meets environmental protection requirements, thus having good social benefits.

[0055] The drive assembly 5 and the pump barrel 1 are connected by a connector 6 with several mesh holes 621, and the outlet section 4 is threaded and sealed to the pump barrel 1, which ensures the stability and sealing of the connection between the components, laying a solid foundation for the stable operation of the submersible pump, and enabling it to work reliably even under complex working conditions.

[0056] The support 7, flat valve 3, impeller 8, guide vane 9, and other components are scientifically arranged within the pump casing 1. The impeller 8 is distributed vertically at intervals, and the guide vane 9 is fitted over the impeller 8, resulting in a compact and rational overall structure. The installation position and operating mode of the flat valve 3, in coordination with other components, ensure the reliability and high efficiency of the submersible pump. While improving performance, it optimizes space utilization, making the product design more advantageous. The submersible pump in this embodiment can still efficiently distribute flow at a speed of 5200 r / min.

[0057] This includes an upper bushing 11, a first rubber bushing 12, a lower bushing 14, a second rubber bushing 15, a first gasket 16, and a second gasket 17. The first rubber bushing 12 is fixed to the valve seat of the flat valve 3. The upper bushing 11 is rotatably connected to the middle of the first rubber bushing 12. The top end of the pump shaft 2 is inserted into the upper bushing 11 and fixedly connected to it. The second rubber bushing 15 is fixed to the support 7. The lower bushing 14 is rotatably connected to the middle of the second rubber bushing 15. The pump shaft 2 passes through the lower bushing 14 and then through the guide vane 9. A first gasket 16 is provided after each guide vane 9. The uppermost first gasket 17 is located at the top. The distance between the top surface of 6 and the bottom surface of the upper bushing 11 is 1.5-2.5mm. The pump shaft 2 between the lower bushing 14 and the coupling 10, and between the lower bushing 14 and the impeller 8 above it, is provided with a second gasket 17. The pump shaft 2 is an external hexagonal shaft. The upper bushing 11, the lower bushing 14, the first gasket 16, the second gasket 17, and the impeller 8 all have an internal hexagonal hole 18 that mates with the external hexagonal shaft. The top of the coupling 10 has an internal hexagonal groove 101 that mates with the external hexagonal shaft. The output end of the drive assembly 5 has an involute external spline 561, and the bottom end of the coupling 10 has an involute internal spline 102 that mates with the involute external spline 561.

[0058] The combined design of the upper bushing 11, the first rubber bushing 12, the lower bushing 14, and the second rubber bushing 15 greatly improves the stability of the pump shaft 2 during rotation. The first rubber bushing 12 is fixed to the valve seat of the flat valve 3, and its rotatable connection with the upper bushing 11, as well as the second rubber bushing 15 being fixed to the support 7 and rotatably connected to the lower bushing 14, effectively buffer the vibration and displacement generated by the pump shaft 2 during high-speed rotation. Especially under high-speed operating conditions, it can prevent the pump shaft 2 from shaking or deviating, ensuring that the impeller 8 and the guide vane 9 always maintain a precise relative position, continuously achieving efficient flow distribution, and avoiding water flow turbulence and increased energy loss caused by the instability of the pump shaft 2.

[0059] The use of rubber bushings provides excellent shock absorption and wear resistance. The first rubber bushing 12 and the second rubber bushing 15 rotate with the upper bushing 11 and lower bushing 14 respectively, reducing direct friction between the pump shaft 2 and the valve seat and support 7, lowering component wear, extending the service life of these critical components, and thus reducing overall maintenance costs. Furthermore, the placement of a first gasket 16 for each guide vane 9, and a second gasket 17 between the lower bushing 14 and the coupling 10, and between the lower bushing 14 and the impeller 8 above it, not only provide positioning and cushioning but also further reduce wear caused by relative movement between components, improving the durability of the entire submersible pump system.

[0060] Strictly limiting the distance between the top surface of the first gasket 16 and the bottom surface of the upper bushing 11 to 1.5-2.5mm can directly and significantly improve the volumetric efficiency of the pump.

[0061] Under high-speed operation, the reliable fit between the outer hexagonal shaft and the inner hexagonal hole 18 and inner hexagonal groove 101, as well as the high precision and stability of the involute spline connection, ensures that the power of the drive assembly 5 is accurately and stably transmitted to the pump shaft 2, thereby driving the impeller 8 to rotate at a precise and stable speed. The stability of the impeller 8's speed is fundamental to achieving efficient flow distribution. Only with stable speed can the impeller 8 throw water out at the appropriate speed and direction according to design requirements, providing the prerequisite for efficient flow in subsequent components such as the guide vane 9. Due to stable power transmission, the pump shaft 2 will not experience vibration or deviation caused by unstable torque transmission, allowing the impeller 8 to maintain a precise relative position with the guide vane 9 during high-speed rotation. The relative positional accuracy of the impeller 8 and the guide vane 9 is crucial for efficient flow distribution. Only with precise positioning can the guide vane 9 effectively guide the water thrown out by the impeller 8, ensuring it flows along the designed flow path, avoiding turbulent flow, achieving efficient energy conversion and water distribution, and increasing the pump's output flow rate and head. This connection method, with its high load-bearing capacity, excellent centering accuracy, and guiding properties, can withstand significant torque and axial force at high speeds, reducing component wear and fatigue damage, and improving the reliability and stability of the entire submersible pump system. System reliability is crucial for achieving efficient flow distribution, because only under stable and reliable operating conditions can the pump maintain its efficient flow distribution performance during prolonged high-speed operation, preventing damage to components or system instability from affecting the flow distribution effect.

[0062] The impeller 8 includes a hub 81, a first cover plate 82, a second cover plate 83, first arc-shaped blades 84, and a guide ring 85. The first cover plate 82 is fixed to the hub 81. Several first arc-shaped blades 84 are fixed at the bottom of the first cover plate 82 and spaced apart along the circumference of the hub 81. The second cover plate 83 is fixed at the bottom of the first arc-shaped blades 84. A first flow channel 86 is formed between the first cover plate 82, the second cover plate 83, and the adjacent first arc-shaped blades 84. The second cover plate 83 has a first through hole 87 in the middle, which communicates with the first flow channel 86. The bottom of the second cover plate 83 has a guide ring 85, which communicates with the first through hole 87.

[0063] The design of the first arc-shaped blade 84 precisely guides the water flow. When the impeller 8 rotates, the water flows along the curved surface of the first arc-shaped blade 84, effectively controlling the flow direction and guiding the water flow more efficiently from the center of the impeller 8 to the outer edge, reducing turbulence and energy loss, and improving the hydraulic performance of the submersible pump. The first flow channel 86 formed between the first cover plate 82, the second cover plate 83, and the first arc-shaped blade 84 provides a regular flow space for the water. This structure allows the water to flow orderly within the first flow channel 86, reducing the probability of water flow collisions and friction, further reducing energy loss, and improving the flow rate and head efficiency of the submersible pump. The first through hole 87 connects the first flow channel 86 and the guide ring 85, making the water flow inside the impeller 8 more continuous. When the water flows from the guide ring 85 through the first through hole 87 into the first flow channel 86, the transition is smooth, reducing water flow impact and pressure loss, helping to maintain the stability of the water flow inside the submersible pump and ensuring its stable operation. The combined connection of components such as hub 81, first cover plate 82, second cover plate 83, and first arc-shaped blade 84 enhances the overall structural strength and stability of impeller 8. During high-speed operation, it can withstand significant centrifugal force and water flow impact, and is less prone to deformation or damage, ensuring the normal operation of impeller 8 and thus guaranteeing the reliable operation of the water pump.

[0064] The guide vane 9 includes a base plate 91, a first ring seat 92, a second arcuate blade 93, a third arcuate blade 94, and a cover 95. The base plate 91 has a plurality of second arcuate blades 93 fixed around its circumference. The second arcuate blades 93 extend from the base plate 91. The outer ends of the plurality of second arcuate blades 93 are fixedly connected to the inner sidewall of the first ring seat 92. A channel 96 is formed between adjacent second arcuate blades 93 and the first ring seat 92. The base plate 91 has a second through hole 97 in the middle. A plurality of third arcuate blades 94 are fixed at the top of the base plate 91 and are spaced apart around the second through hole 97. A second flow channel 98 is formed between the base plate 91 and adjacent third arcuate blades 94. The second flow channel 98 is connected to the channel 96. A cover 95 is formed by extending the sidewall of each third arcuate blade 94. The outer sidewall of the cover 95 is connected to the inner sidewall of the first ring seat 92 and is located above the channel 96.

[0065] The water radially ejected from the impeller 8 is collected and converted into axial motion by the first ring seat 92. It first passes through the second arc-shaped blade 93 into the channel 96. The second arc-shaped blade 93 initially regulates and guides the turbulent water flow from the impeller 8, changing the flow direction and allowing it to enter the channel 96 in an orderly manner. This lays the foundation for smooth flow within the guide vane 9, reducing energy loss caused by disordered water flow and improving the pump's hydraulic performance. The channel 96 is connected to the second flow channel 98, allowing water to smoothly enter from the channel 96. This continuous flow channel design makes the transition of water flow within the guide vane 9 natural and smooth, reducing collisions and friction at turning points, further improving energy utilization and effectively increasing the pump's flow rate and head efficiency. The base plate 91, the first ring seat 92, the second arc-shaped blade 93, the third arc-shaped blade 94, and the cover 95 are interconnected to form a stable structure. When subjected to the impact force of the water flow from the impeller 8 and the force generated by high-speed operation, the structure remains stable and is not easily deformed or damaged, ensuring the reliable operation of the guide vane 9 and maintaining the stable operation of the submersible pump. The cover 95 is located above the channel 96, which can prevent the water flow from being disturbed upward or overflowing in the channel 96, and constrain the water flow within the set flow channel. In conjunction with the second arc-shaped blade 93 and the third arc-shaped blade 94, the water flow pattern is further optimized, ensuring that the water flow in the guide vane 9 flows efficiently according to the designed path, helping the pump to achieve efficient flow distribution.

[0066] The system also includes a third cover plate 19. Each guide ring 85 is provided with a third cover plate 19 below it. The third cover plate 19 has a third through hole 20 in the middle, which is connected to the guide ring 85. The support 7 includes a base 71, a flow divider 72, and a second ring seat 73. The outer side wall of the base 71 is provided with a number of flow dividers 72 at intervals along its circumference. The outer ends of the flow dividers 72 are fixedly connected to the inner side wall of the second ring seat 73. A flow divider space 74 is formed between the base 71, the second ring seat 73, and the adjacent flow dividers 72. The flow divider space 74 is connected to the third through hole 20. The third cover plate 19 located between the impeller 8 and the guide vane 9 blocks part of the top opening of the second flow channel 98. The third cover plate 19 located between the impeller 8 and the support 7 blocks the top opening of the flow divider space 74.

[0067] The third cover plate 19 and its third through hole 20 are connected to the guide ring 85, which can further guide the water flow from the impeller 8, ensuring that the water flow enters the subsequent structure more concentratedly and stably. By restricting the direction of water flow, the diffusion and turbulence of water flow are reduced, the water flow transmission efficiency is improved, and better water flow conditions are provided for the subsequent energy conversion stage. The flow splitting space 74 formed by the base 71, the flow splitter 72 and the second ring seat 73 in the support 7 is connected to the third through hole 20, which can evenly distribute the water flow into each flow splitting space 74. This makes the water flow inside the submersible pump more orderly, avoids excessive or insufficient local water flow, and ensures that each stage of the impeller 8 and guide vane 9 can efficiently act on the water flow, improving the overall working performance and stability of the pump. The third cover plate 19 located between the impeller 8 and the guide vane 9 blocks part of the top opening of the second flow channel 98, which can constrain the water flow in the second flow channel 98 to flow along a predetermined path, reducing water flow cross-flow and energy loss in the second flow channel 98. The water flow undergoes more stable energy conversion within the second flow channel 98, enabling the guide vane 9 to more effectively convert the kinetic energy of the water flow into potential energy, thereby improving the pump's head and hydraulic efficiency. The third cover plate 19, located between the impeller 8 and the support 7, blocks the top opening of the diversion space 74, preventing water from overflowing from the top of the diversion space 74 and ensuring sufficient diversion and energy transfer within the diversion space 74. This helps maintain stable water pressure within the diversion space 74, ensuring the continuity and stability of the diversion effect, and further improving the efficiency and reliability of energy conversion within the pump. The third cover plate 19 also provides additional structural support to a certain extent between the impeller 8 and the guide vane 9, and between the impeller 8 and the support 7, enhancing the overall integrity and stability of the submersible pump's internal structure. During high-speed pump operation, it reduces displacement between components caused by vibration and water flow impact, ensuring the accuracy of the relative positions of each component and extending the pump's service life.

[0068] In the design of submersible pumps, the precise setting of several key parameters of impeller 8 is crucial to improving its overall performance.

[0069] Properly setting the outlet width of impeller 8 can effectively improve the efficiency of submersible pumps. This invention sets the outlet width of impeller 8 to 5.2 mm, a value determined after comprehensively considering issues such as dust permeability, flow vortices within the first flow channel 86, and secondary backflow. Appropriately increasing the outlet width not only provides sufficient flow area for the liquid at the impeller 8 outlet, reducing flow resistance, but also facilitates production and processing, and improves the efficiency and reliability of the submersible pump.

[0070] The precise outlet diameter of the impeller 8 is also crucial for ensuring the performance of the submersible pump. This invention sets the outlet diameter of the impeller 8 to 60mm, ensuring that the impeller 8 discharges liquid at a suitable speed and pressure, achieving the designed head and flow rate. Simultaneously, the outlet diameter of the impeller 8 works in conjunction with parameters such as the outlet width of the impeller 8 and the outlet installation angle of the first arc-shaped blade 84 to jointly optimize the overall performance of the pump.

[0071] The outlet installation angle of the first arc-shaped blade 84 has a significant impact on the operation of the submersible pump. This application selects a relatively small outlet installation angle of 30° to avoid the diffusion problem in the flow channel 96 caused by an insufficient number of first arc-shaped blades 84, thereby expanding the high-efficiency operating range of the submersible pump and preventing overload. This angle allows for more rational liquid flow at the impeller 8 outlet, improving the pump's head and efficiency, and ensuring stable operation under different working conditions.

[0072] The wrap angle of the first arc-shaped blade 84 is of great significance to improving the flow field performance of the impeller 8. This application adopts a relatively large wrap angle of 215°, which can reduce diffusion losses within the impeller 8 and improve the working efficiency of the impeller 8. The size of the wrap angle determines the flow path and time of the liquid between the first arc-shaped blades 84. A suitable wrap angle allows the liquid to more fully acquire the energy transferred by the impeller 8, reduce energy loss, and thus improve the overall performance of the pump.

[0073] In submersible pump design, the proper setting of parameters for each component of the guide vane 9 is crucial to the pump's performance and operational stability. The following is an explanation of the function of each parameter and the optimization of its final values:

[0074] The base circle diameter of guide vane 9 is precisely matched with the outlet diameter of impeller 8 to ensure that the radial clearance between the outlet of impeller 8 and the inlet of guide vane 9 does not exceed 5mm. This design allows the liquid to smoothly transition from impeller 8 to guide vane 9, reducing flow impact and vibration, and ensuring stable operation of the submersible pump. The final base circle diameter of guide vane 9 was determined to be 65mm.

[0075] Increasing the inlet width of the second arc-shaped blade 93 allows for smoother liquid entry into the guide vane 9, reducing flow resistance, improving water intake efficiency, and preventing water flow blockage and energy loss caused by an excessively narrow inlet. The final inlet width of the second arc-shaped blade 93 was determined to be 14 mm.

[0076] By selecting a suitable outlet diameter for the second arc-shaped blade (93), the pump body structure can be optimized while meeting the pump's head and flow requirements. To reduce the pump body size, the final outlet diameter for the second arc-shaped blade (93) was determined to be 85mm, making the overall pump size more compact and saving space and material costs.

[0077] A suitable inlet angle for the second arc-shaped blade 93 allows the liquid to enter the second flow channel 98 at the appropriate angle, ensuring smooth liquid flow within the channel, reducing flow losses and vortices, and improving the efficiency of the guide vane 9 in converting liquid energy into pressure energy. After comprehensive consideration, the final inlet angle was determined to be 35°.

[0078] The number of the second arc-shaped blades 93 has a significant impact on the hydraulic characteristics and liquid energy conversion of the guide vane 9, and is also closely related to the vibration during submersible pump operation. A suitable number of blades ensures that the liquid flow between every two blades continuously enters the second flow channel 98, guaranteeing the continuity and stability of the liquid flow, reducing vibration, and improving the pump's reliability and service life. After comprehensive consideration, the final determination was that both the second arc-shaped blades 93 and the third arc-shaped blades 94 should have six blades each.

[0079] The inlet diameter of the third arc-shaped blade 94 is slightly smaller than the outlet diameter of the second arc-shaped blade 93. This helps guide the liquid smoothly into the second flow channel 98, avoiding liquid flow turbulence caused by an improper inlet diameter, and ensuring that the third arc-shaped blade 94 effectively performs its guiding and energy conversion functions. The final inlet diameter of the third arc-shaped blade 94 was determined to be 82 mm.

[0080] By appropriately selecting the outlet diameter of the third arc-shaped blade (94), the liquid can enter the next impeller (8) at a suitable speed and direction, achieving smooth liquid transfer between impellers (8) and ensuring the coordinated working efficiency of each stage of the multi-stage pump. The final outlet diameter was determined to be 79mm.

[0081] By appropriately increasing the axial width of the third arc-shaped blade 94, the internal flow velocity can be reduced, providing more space for liquid flow and energy conversion, and reducing energy loss and flow instability caused by excessive flow velocity. The final axial width was determined to be 20 mm.

[0082] Through a series of calculations, the appropriate inlet and outlet angles of the third arc-shaped blade 94 were determined. This ensures that the liquid flows along the designed path within the second flow channel 98, guaranteeing smooth flow, improving the guiding effect and energy conversion efficiency, and allowing the liquid to enter the next impeller 8 in a suitable state, thereby optimizing the overall performance of the submersible pump. The final inlet angle was determined to be 24°, and the outlet angle to be 90°.

[0083] The drive assembly 5 includes a barrel 51, a lower bearing housing 52, a first rubber bearing 53, a cable 54, a stator 55, a rotor 56, an upper bearing housing 57, a second rubber bearing 58, and a first mechanical seal structure 59. The upper bearing housing 57, the stator 55, and the lower bearing housing 52 are fixed inside the barrel 51 from top to bottom. The first rubber bearing 53 is installed in the middle of the upper bearing housing 57, and the second rubber bearing 58 is installed in the middle of the lower bearing housing 52. The bottom end of the rotor 56 is inserted into the second rubber bearing 58, and the top end of the rotor 56 passes through the stator 55 and the first rubber bearing 53 and is connected to the coupling 10. The first mechanical seal structure 59 is provided between the interior of the upper bearing housing 57 and the upper part of the rotor 56. The cable 54 is connected to the stator 55.

[0084] The upper bearing housing 57 and the lower bearing housing 52 are respectively equipped with a first rubber bearing 53 and a second rubber bearing 58, providing precise positioning and reliable support for the rotor 56. This ensures that the rotor 56 maintains a stable axial position during high-speed rotation, reduces vibration and misalignment, and makes the rotation of the rotor 56 smoother and more stable, thereby ensuring the stable operation of the entire drive assembly 5. Rubber bearings have good elasticity and buffering performance. The first rubber bearing 53 and the second rubber bearing 58 can effectively absorb the vibration and impact generated when the rotor 56 rotates, reduce the impact of vibration on the barrel 51 and other components, extend the service life of components, and also reduce noise caused by vibration, improving the operating environment of the equipment. A first mechanical seal structure 59 is set between the inside of the upper bearing housing 57 and the upper part of the rotor 56, which can effectively prevent the insulating oil 513 inside the barrel 51 from leaking to the outside, and also prevent external dust, moisture and other impurities from entering the inside of the barrel 51, protecting key components such as the stator 55 and rotor 56 from contamination and damage, extending the service life of the drive assembly 5, and improving its reliability and stability.

[0085] The drive assembly 5 also includes a sealing screw 510, a first sealing ring 511, a second sealing ring 512, insulating oil 513, an oil bladder 514, and a bottom cover 515. The lower part of the barrel 51 is fixed with an oil bladder 514, and the lower part of the oil bladder 514 is provided with a bottom cover 515. The bottom cover 515 has a vent hole 516. The top of the upper bearing seat 57 has an oil injection hole 517. A sealing screw 510 is provided in the oil injection hole 517. A first sealing ring 511 is provided between the sealing screw 510 and the oil injection hole 517. A second sealing ring 512 is provided between the upper bearing seat 57 and the barrel 51. The lower bearing seat 52 has a fourth through hole 518. A sealed space is formed between the upper bearing seat 57, the barrel 51, and the oil bladder 514. The sealed space is filled with insulating oil 513.

[0086] A second sealing ring 512 is provided between the upper bearing housing 57 and the barrel 51 to effectively prevent the insulating oil 513 inside the barrel 51 from leaking from the connection between the two, ensuring the sealing performance of the sealed space, maintaining a stable environment for the insulating oil 513, and preventing the normal operation of the drive assembly 5 from being affected by oil leakage. At the same time, it can also prevent external impurities from entering the sealed space and protect internal components from contamination. The sealing screw 510 in the oil injection hole 517 cooperates with the first sealing ring 511, providing a convenient oil injection channel through the oil injection hole 517 when it is necessary to inject insulating oil 513. After injection, it can reliably seal, preventing the insulating oil 513 from overflowing from the oil injection hole 517, ensuring the integrity of the sealed space, maintaining a good working environment, and avoiding performance degradation caused by oil loss. The sealed space formed between the upper bearing housing 57, the barrel 51, and the oil bladder 514 and filled with insulating oil 513 provides a good insulation and heat dissipation environment for key components inside the drive assembly 5, such as the rotor 56 and the stator 55. Insulating oil 513 effectively isolates electrical components, preventing electrical faults such as short circuits. It also carries away heat generated during component operation, ensuring stable operation of the equipment at a suitable temperature and extending its service life. The oil bladder 514 fixed at the bottom of the barrel 51 acts as a buffer to regulate the expansion or contraction of the insulating oil 513 due to temperature changes, preventing abnormal pressure increases or decreases within the sealed space. The breather hole 516 on the bottom cover 515, while providing a certain level of protection, maintains a proper pressure balance between the oil bladder 514 and the external environment, preventing damage to the sealing structure or affecting the normal operation of the oil bladder 514 due to pressure issues, ensuring the safe and stable operation of the entire drive assembly 5 under different operating conditions.

[0087] The connecting component 6 includes a connecting seat 61, a mesh ring 62, a cylinder cover 63, a sand guard 64, and a second mechanical seal structure 65. The upper end of the connecting seat 61 is screwed to the lower part of the pump barrel 1, and the lower end of the connecting seat 61 is fixed to the upper bearing seat 57. The cylinder cover 63 is provided between the upper bearing seat 57 and the connecting seat 61. The mesh ring 62 is sleeved on the connecting seat 61, and a number of mesh holes 621 are distributed circumferentially along the mesh ring 62. The sand guard 64 is fixed to the top of the upper bearing seat 57, and the rotor 56 passes through the top wall of the sand guard 64. The second mechanical seal structure 65 is provided between the inside of the sand guard 64 and the upper part of the rotor.

[0088] The upper end of the connecting seat 61 is screwed to the lower part of the pump barrel 1, and the lower end is fixed to the upper bearing seat 57, thus building a stable connection bridge between the pump barrel 1 and the drive assembly 5. This connection method ensures the coordinated stability between all components of the submersible pump. During pump operation, it can effectively withstand external forces such as water flow impact and mechanical vibration, ensuring that the equipment will not malfunction due to loose components and extending the service life of the equipment. The mesh ring 62 is fitted on the connecting seat 61, and several mesh holes 621 are distributed circumferentially along its circumference, playing a preliminary filtering role. When liquid enters the pump body through the connecting part 6, the mesh holes 621 can block larger particulate impurities, preventing them from entering the pump and protecting precision components such as the impeller 8 and guide vanes 9 from wear, thereby improving the hydraulic efficiency and operational reliability of the pump. At the same time, the evenly distributed mesh holes 621 ensure the uniformity of water intake, which is beneficial to the efficient acceleration of the liquid by the impeller 8. The sand guard 64 is fixed to the top of the upper bearing housing 57, effectively preventing sand, dust, and other external impurities from entering the drive assembly 5. This avoids wear on components such as the upper bearing housing 57, the first rubber bearing 53, and the rotor 56, ensuring the normal operation of all components of the drive assembly 5, reducing maintenance costs, and extending the overall service life of the equipment. The second mechanical seal structure 65, located between the sand guard 64 and the upper part of the shaft, further enhances the sealing performance. It prevents liquid leakage from the pump along the shaft, avoiding liquid entry into the drive assembly 5, which could affect the insulation performance of electrical components and the normal operation of mechanical components. This ensures the stable operation of the drive assembly 5, improves the submersible pump's waterproof and dustproof rating, and enables it to adapt to more complex and harsh working environments. The cooperation of the first mechanical seal structure 59 and the second mechanical seal structure 65 reduces energy consumption and balances axial pressure. The cylinder cover 63 is located between the upper bearing housing 57 and the connecting seat 61, protecting the mechanical structure and connection points in this area. It can prevent debris from accumulating at the connection point and affecting the connection stability. At the same time, it can buffer external impact to a certain extent, prevent the connection between the upper bearing housing 57 and the connecting housing 61 from being damaged by accidental impact, ensure the connection between the drive assembly 5 and the pump barrel 1 is stable, and promote the coordinated operation of the entire submersible pump system.

[0089] It also includes a protective sleeve 21 and a sealing sleeve 22. The protective sleeve 21 is disposed on the outer side wall of the pump barrel 1 and the connector 6 and communicates with the internal space of the connector 6. The upper bearing seat 57 has a through hole 519. The cable 54 passes through the protective sleeve 21 and extends into the interior of the connector 6, and passes through the through hole 519 to connect with the stator 55. A sealing sleeve 22 is disposed between the cable 54 and the through hole 519.

[0090] The protective sleeve 21 is installed on the outer wall of the pump barrel 1 and the connector 6, providing an additional physical protective barrier for the cable 54. During the operation of the submersible pump, especially in complex underwater environments, it effectively prevents the cable 54 from being scratched or bumped by external objects, avoids damage to the cable sheath, ensures the integrity of the internal wires, guarantees the stability of power transmission, and extends the service life of the cable 54. The protective sleeve 21 guides the cable 54, making the process of the cable 54 entering the connector 6 from the outside more orderly and preventing the cable 54 from being tangled or messy around the pump body, facilitating installation, maintenance, and troubleshooting, and improving the operability and reliability of the entire submersible pump system. The sealing sleeve 22 is installed between the cable 54 and the through hole 519 of the upper bearing seat 57, forming a multi-layer waterproof sealing system together with the protective sleeve 21. The protective sleeve 21 prevents external water from directly contacting the cable 54, while the sealing sleeve 22 further ensures the sealing of the perforation 519, preventing water from seeping into the sealed space along the gap between the cable 54 and the perforation 519, avoiding damage such as short circuits and corrosion to electrical components such as the stator 55, and ensuring the normal operation of the drive assembly 5.

[0091] Example 2:

[0092] This embodiment provides a novel submersible pump usage method according to Embodiment 1, including the following steps: Install and debug the novel submersible pump. After debugging, fix the connection end of the cable 54 of the drive component 5 outside the wellhead and connect it to the wiring hole of the pure electric control system or solar energy control system outside the well. Then, put the novel submersible pump into deep water. After checking that everything is correct, test power-on and run the pump for debugging until it can work normally for 24 hours.

[0093] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 this utility model.

Claims

1. A novel submersible pump, characterized in that: This includes drive components, connectors, supports, pump casing, couplings, pump shaft, impeller, guide vanes, flat valve, and outlet section; The drive assembly and the pump cylinder are connected by a connector having several mesh openings. Both the support and the flat valve are installed inside the pump cylinder; Several impellers are arranged at vertical intervals between the support and the flat valve. The output end of the drive assembly is connected to a pump shaft via a coupling. The impellers are fixed to the pump shaft. The pump shaft passes through the support and is inserted into the flat valve. Each impeller is fitted with a guide vane, and the impeller is rotatable relative to the guide vane; The outlet section is sealed to the pump cylinder and is located above the flat valve.

2. The novel submersible pump according to claim 1, characterized in that: It also includes an upper bushing, a first rubber bushing, a lower bushing, a second rubber bushing, a first gasket, and a second gasket; The first rubber bushing is fixed to the valve seat of the flat valve, and an upper bushing is rotatably connected to the middle of the first rubber bushing. The top end of the pump shaft is inserted into the upper bushing and fixedly connected to the upper bushing. The second rubber bushing is fixed to the support, and a lower bushing is rotatably connected to the middle of the second rubber bushing, through which the pump shaft passes. The pump shaft passes through the guide vane, and a first gasket is provided after each guide vane. The distance between the top surface of the uppermost first gasket and the bottom surface of the upper shaft sleeve is 1.5-2.5mm. A second gasket is provided between the lower shaft sleeve and the coupling, and between the lower shaft sleeve and the impeller above it on the pump shaft. The pump shaft is an external hexagonal shaft, and the upper shaft sleeve, lower shaft sleeve, first gasket, second gasket, and impeller all have internal hexagonal holes that mate with the external hexagonal shaft; The top of the coupling has an internal hexagonal groove that mates with the external hexagonal shaft; The output end of the drive assembly has an involute external spline, and the bottom end of the coupling has an involute internal spline that mates with the involute external spline.

3. The novel submersible pump according to claim 1, characterized in that: The impeller includes a hub, a first cover plate, a second cover plate, a first arc-shaped blade, and a guide ring; The first cover plate is fixed to the wheel hub; The bottom end of the first cover plate is fixed with a plurality of first arc-shaped blades that are spaced apart along the circumference of the hub. A second cover plate is fixed to the bottom end of the first arc-shaped blade; A first flow channel is formed between the first cover plate, the second cover plate, and the adjacent first arc-shaped blade; The second cover plate has a first through hole in the middle, and the first through hole communicates with the first flow channel; The bottom of the second cover plate has a flow guide ring, which communicates with the first through hole.

4. The novel submersible pump according to claim 3, characterized in that: The guide vane includes a base plate, a first annular seat, a second arcuate blade, a third arcuate blade, and a cover. The substrate has a plurality of second arc-shaped blades fixed along its circumference, the second arc-shaped blades extending from the substrate; The outer ends of several of the second arc-shaped blades are fixedly connected to the inner sidewall of the first ring seat; A channel is formed between the adjacent second arc-shaped blade and the first ring seat; The substrate has a second through hole in the middle, and a plurality of third arc-shaped blades are fixed on the top of the substrate at intervals along the circumference of the second through hole. A second flow channel is formed between the substrate and the adjacent third arc-shaped blade, and the second flow channel is connected to the channel. Each of the third arcuate blades has a sidewall extending to form a cover, the outer sidewall of which is connected to the inner sidewall of the first ring seat and is located above the channel.

5. The novel submersible pump according to claim 4, characterized in that: It also includes a third cover plate; Each of the flow guide rings is provided with a third cover plate below it, and the third cover plate has a third through hole in the middle, which communicates with the flow guide ring; The support includes a base, a flow divider, and a second ring seat; The outer side wall of the base is provided with a plurality of diversion plates at intervals along its circumference. The outer ends of the plurality of diversion plates are fixedly connected to the inner side wall of the second ring seat. A diversion space is formed between the base, the second ring seat, and the adjacent diversion plates. The diversion space is connected to the third through hole. The third cover plate located between the impeller and the guide vane blocks part of the top opening of the second flow channel; The third cover plate, located between the impeller and the support, blocks the top opening of the diversion space.

6. The novel submersible pump according to claim 5, characterized in that: The impeller has an outlet width of 5.2 mm and an outlet diameter of 60 mm. The outlet installation angle of the first arc-shaped blade is 30°, and the wrap angle of the first arc-shaped blade is 215°. The base circle diameter of the guide vane is 65 mm; The inlet width of the second arc-shaped blade is 14mm, the outlet diameter of the second arc-shaped blade is 85mm, and the inlet placement angle of the second arc-shaped blade is 35°. The inlet diameter of the third arc-shaped blade is 82mm, the outlet diameter of the third arc-shaped blade is 79mm, the axial width of the third arc-shaped blade is 20mm, the inlet placement angle of the third arc-shaped blade is 24°, and the outlet placement angle of the third arc-shaped blade is 90°. The number of the second and third arc-shaped blades is 6 each.

7. The novel submersible pump according to claim 1, characterized in that: The drive assembly includes a barrel, a lower bearing housing, a first rubber bearing, a cable, a stator, a rotor, an upper bearing housing, a second rubber bearing, and a first mechanical seal structure; The upper bearing housing, stator, and lower bearing housing are fixed inside the barrel from top to bottom. The first rubber bearing is installed in the middle of the upper bearing housing, and the second rubber bearing is installed in the middle of the lower bearing housing; The bottom end of the rotor is inserted into the second rubber bearing, and the top end of the rotor passes through the stator and the first rubber bearing and is connected to the coupling; A first mechanical seal structure is provided between the interior of the upper bearing housing and the upper part of the rotor; The cable is connected to the stator.

8. The novel submersible pump according to claim 7, characterized in that: The drive assembly also includes a sealing screw, a first sealing ring, a second sealing ring, insulating oil, an oil bladder, and a bottom cover; An oil bladder is fixed to the lower part of the barrel, and a bottom cover is provided at the lower part of the oil bladder. The bottom cover has a vent hole. The top of the upper bearing housing has an oil injection hole, a sealing screw is provided in the oil injection hole, a first sealing ring is provided between the sealing screw and the oil injection hole, and a second sealing ring is provided between the upper bearing housing and the barrel. The lower bearing housing has a fourth through hole; A sealed space is formed between the upper bearing housing, the barrel, and the oil bladder, and the sealed space is filled with insulating oil.

9. The novel submersible pump according to claim 7, characterized in that: The connecting component includes a connecting seat, a mesh ring, a cylinder cover, a sand guard, and a second mechanical seal structure; The upper end of the connecting seat is screwed to the lower part of the pump cylinder, and the lower end of the connecting seat is fixed to the upper bearing seat. A cylinder cover is provided between the upper bearing seat and the connecting seat. The mesh ring is sleeved on the connecting seat, and a plurality of the mesh holes are spaced apart along the circumference of the mesh ring; The sand shield is fixed to the top of the upper bearing seat, the rotor passes through the top wall of the sand shield, and a second mechanical seal structure is provided between the interior of the sand shield and the upper part of the rotor; It also includes protective sleeves and sealing sleeves; The protective sleeve is disposed on the outer wall of the pump cylinder and the connector, and communicates with the internal space of the connector; The upper bearing housing has a through hole; The cable passes through the protective sleeve, extends into the interior of the connector, and passes through the perforation to connect with the stator; A sealing sleeve is provided between the cable and the hole.

Images