Efficient centrifugal pump impeller device with nano-composite coating

Abstract

The invention relates to the technical field of centrifugal pumps, in particular to an efficient centrifugal pump impeller device with a nano-composite coating, which comprises a front cover plate, a rear cover plate, an impeller, a filtering structure and a driving assembly, the driving assembly is arranged on the rear cover plate, the impeller is connected with an output shaft of the driving assembly, and the front cover plate and the rear cover plate are closed; the filter structure comprises a connector, a filter screen, a cleaning box, a scraper and a scraping cylinder, the connector is communicated with the front cover plate, the filter screen is arranged on the connector, the cleaning box is fixed on one side of the filter screen, the scraper is slidably arranged on the filter screen, and the output end of the scraping cylinder is connected with the scraper. And a medium can be better filtered and then pumped out, so that the service life of the impeller is prolonged.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and in particular to a high-efficiency centrifugal pump impeller device with a nanocomposite coating. Background Technology

[0002] A centrifugal pump is a mechanical device that uses the centrifugal force generated by a rotating impeller to transport liquids. During operation, the motor drives the impeller to rotate at high speed. The liquid is drawn in at the center of the impeller and thrown outward along the blade flow channel under the action of centrifugal force, thereby gaining kinetic and pressure energy. The kinetic energy is then converted into pressure energy through the pump casing, and finally the liquid is transported to the outlet pipeline.

[0003] In existing centrifugal pumps, if the medium being pumped contains a large amount of solid particles, silt, fibers, or other impurities, these impurities will enter the pump chamber along with the liquid. Under the action of the high-speed rotating impeller, these impurities will frequently rub against, impact, and even become embedded in the impeller blades, hub, and inner walls of the flow channel. This continuous mechanical wear not only damages the surface finish and geometry of the impeller but may also cause localized stress concentration, accelerating material fatigue and leading to cracks or even fracture. As the wear intensifies, the hydraulic performance of the impeller significantly decreases, manifesting as reduced head, decreased flow rate, decreased efficiency, and increased vibration and noise. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency centrifugal pump impeller device with a nanocomposite coating, which can better filter the medium before pumping it out, thereby improving the working life of the impeller.

[0005] To achieve the above objectives, the present invention provides a high-efficiency centrifugal pump impeller device with a nanocomposite coating, comprising a front cover plate, a rear cover plate, an impeller, a filter structure, and a drive assembly. The drive assembly is disposed on the rear cover plate, the impeller is connected to the output shaft of the drive assembly, and the front cover plate is closed to the rear cover plate.

[0006] The filter structure includes a connector, a filter screen, a cleaning box, a scraper, and a scraping cylinder. The connector is connected to the front cover plate, the filter screen is disposed on the connector, the cleaning box is fixed to one side of the filter screen, the scraper is slidably disposed on the filter screen, and the output end of the scraping cylinder is connected to the scraper.

[0007] The inlet area of ​​the front cover is provided with a flow guide rib, and the extension direction of the flow guide rib is at an acute angle to the incoming flow direction.

[0008] The impeller is provided with a nanocomposite coating, which covers the fluid contact surface of the impeller body. The thickness of the nanocomposite coating in the inlet and outlet regions of the impeller is 15%–30% greater than that in the middle region of the blade.

[0009] The nanocomposite coating includes a transition bonding layer, an intermediate functional layer, and a surface dense layer.

[0010] The transition bonding layer is composed of metal oxide nanoparticles modified with silane coupling agent and epoxy resin, with a thickness of 1–3 μm.

[0011] The intermediate functional layer is a wear-resistant and friction-reducing layer formed by blending silicon carbide nanoparticles and polytetrafluoroethylene, with a thickness of 3–8 μm.

[0012] The dense surface layer is generated in situ from titanium dioxide / graphene composite nanomaterials via a sol-gel method, and has a thickness of 1–3 μm.

[0013] The cleaning box includes a box body, a partition, a sealing plate, and a box door. The partition is fixed inside the box body. The sealing plate is slidably connected to the partition and located on one side of the partition. The box door is rotatably connected to the box body and located on one side of the box body.

[0014] The cleaning box also includes a sealing ring, which is fixedly connected to the box door and located between the box door and the box body.

[0015] The scraper includes a pressure plate, a brush, a first spring, and a support plate. The support plate is fixed to the output end of the scraping cylinder. The pressure plate is rotatably disposed on one side of the support plate. The first spring is used to support the pressure plate. The brush is fixed to the pressure plate and contacts the filter screen.

[0016] The filter structure further includes a baffle and a rotating component. The rotating component is rotatably disposed on one side of the housing, and the baffle is fixed on the rotating component. After the brush moves the impurities to the bottom of the housing, the rotating component is rotated to drive the baffle to limit the impurities.

[0017] The rotating component includes a first gear, a second gear, a rack, and a rotary spring. The first gear and the second gear are rotatably disposed in the housing and mesh with each other. The rack is fixed to the support plate and meshes with the first gear. The baffle is fixed on the second gear. The rotary spring is disposed on one side of the second gear and is used to reset the second gear.

[0018] The drive assembly includes a drive motor, a drive shaft, and a sealing structure. The drive shaft is fixedly connected to the impeller, the output end of the drive motor is connected to the drive shaft, and the sealing structure is disposed on one side of the drive shaft.

[0019] This invention discloses a high-efficiency centrifugal pump impeller device with a nanocomposite coating. The drive assembly is mounted and fixed to the outside of the rear cover plate, and a sealing structure ensures the airtightness of the pump chamber. The output shaft of the drive assembly passes through the central hole of the rear cover plate and is coaxially connected to the impeller located inside the pump chamber, driving the impeller to rotate at high speed, thereby realizing the suction and discharge of liquid. The front cover plate and the rear cover plate are tightly closed by bolts or other fastening methods, forming a closed fluid chamber in which the impeller is located. To prevent impurities from entering the pump chamber and causing blockage or wear, this device also integrates an automatic cleaning filter structure. One end of the connector is connected to the liquid inlet on the front cover, and the other end is used to connect to an external pipeline; the filter screen is installed inside or at the front end of the connector to intercept larger particulate impurities in the liquid; the cleaning box is fixedly set on one side of the filter screen to collect the scraped dirt; the scraper can slide against the surface of the filter screen, and its movement direction is perpendicular to the plane of the filter screen; the scraping cylinder is fixed to the cleaning box or the connector, and its piston rod (output end) is connected to the scraper. Through periodic extension and retraction, it drives the scraper to reciprocate, thereby scraping off the impurities attached to the surface of the filter screen and guiding them into the cleaning box, realizing an online self-cleaning function and avoiding frequent downtime maintenance.

[0020] This invention, through the organic combination of nanocomposite coating technology and intelligent filter self-cleaning structure, not only significantly improves the working efficiency and reliability of centrifugal pump impeller device, but also significantly enhances its adaptability and long-term operational stability under complex working conditions. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a structural diagram of a high-efficiency centrifugal pump impeller device with a nanocomposite coating according to the present invention.

[0023] Figure 2 This is a first cross-sectional view of an efficient centrifugal pump impeller device with a nanocomposite coating according to the present invention.

[0024] Figure 3 yes Figure 2 A magnified view of detail A.

[0025] Figure 4 This is a second cross-sectional view of an efficient centrifugal pump impeller device with a nanocomposite coating according to the present invention.

[0026] Front cover plate 101, rear cover plate 102, impeller 103, filter structure 104, drive assembly 105, connector 106, filter screen 107, cleaning box 108, scraper 109, scraping cylinder 110, box body 111, partition 112, sealing plate 113, box door 114, sealing ring 115, pressure plate 116, sweeping brush 117, first spring 118, support plate 119, baffle 120, rotating part 121, first gear 122, second gear 123, rack 124, drive motor 126, drive shaft 127, sealing structure 128. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Please see Figures 1-4This invention provides a high-efficiency centrifugal pump impeller 103 device with a nanocomposite coating, including a front cover plate 101, a rear cover plate 102, an impeller 103, a filter structure 104, and a drive assembly 105. The drive assembly 105 is disposed on the rear cover plate 102, and the impeller 103 is connected to the output shaft of the drive assembly 105. The front cover plate 101 and the rear cover plate 102 are closed. The filter structure 104 includes a connector 106, a filter screen 107, a cleaning box 108, a scraper 109, and a scraping cylinder 110. The connector 106 communicates with the front cover plate 101, the filter screen 107 is disposed on the connector 106, the cleaning box 108 is fixed to one side of the filter screen 107, the scraper 109 is slidably disposed on the filter screen 107, and the output end of the scraping cylinder 110 is connected to the scraper 109.

[0030] In this embodiment, the drive assembly 105 is mounted and fixed to the outside of the rear cover plate 102, and the sealing structure 128 ensures the airtightness of the pump chamber. The output shaft of the drive assembly 105 passes through the central hole of the rear cover plate 102 and is coaxially connected to the impeller 103 located inside the pump chamber, thereby driving the impeller 103 to rotate at high speed, thus realizing the intake and discharge of liquid. The front cover plate 101 and the rear cover plate 102 are tightly closed by bolts or other fastening methods, together forming a closed fluid chamber, in which the impeller 103 is disposed.

[0031] To prevent impurities from entering the pump chamber and causing blockage or wear, this device also integrates an automatic cleaning filter structure 104. One end of the connector 106 is connected to the liquid inlet on the front cover plate 101, and the other end is used to connect to an external pipeline; the filter screen 107 is installed inside or at the front end of the connector 106 to intercept larger particulate impurities in the liquid; the cleaning box 108 is fixedly installed on one side of the filter screen 107 to collect the scraped dirt; the scraper 109 is slidably attached to the surface of the filter screen 107, and its movement direction is perpendicular to the plane of the filter screen; the scraping cylinder 110 is fixed to the cleaning box 108 or the connector 106, and its piston rod (output end) is connected to the scraper 109. Through periodic extension and retraction, the scraper 109 is driven to reciprocate, thereby scraping off the impurities attached to the surface of the filter screen 107 and guiding them into the cleaning box 108, realizing an online self-cleaning function and avoiding frequent downtime maintenance.

[0032] This invention, through the organic combination of nanocomposite coating technology and intelligent filter self-cleaning structure, not only significantly improves the working efficiency and reliability of the centrifugal pump impeller 103 device, but also significantly enhances its adaptability and long-term operational stability under complex working conditions.

[0033] The inlet area of ​​the front cover plate 101 is provided with a flow guide rib, and the extension direction of the flow guide rib is at an acute angle to the incoming flow direction.

[0034] Several guide ribs are provided in the inlet area of ​​the front cover plate 101 (i.e., the initial channel for liquid to enter the pump chamber). These guide ribs are evenly distributed circumferentially, and their extension direction forms an acute angle between 10° and 45° with the incoming flow direction, preferably 20°–30°. This angle design effectively guides the incoming liquid to smoothly transition to the impeller 103 inlet, reducing flow separation, vortex, and local impact losses, thereby reducing inlet hydraulic noise and improving the pump's suction performance. At the same time, the cross-section of the guide ribs is airfoil-shaped or arc-shaped with a smooth surface, further reducing flow resistance and improving flow field uniformity, especially exhibiting better stability under low flow or variable operating conditions.

[0035] The impeller 103 is provided with a nanocomposite coating, which covers the fluid contact surface of the impeller 103 body. The thickness of the nanocomposite coating in the inlet and outlet edge regions of the impeller 103 is 15%–30% greater than that in the middle region of the blade.

[0036] The nanocomposite coating comprises a transition bonding layer, an intermediate functional layer, and a surface dense layer;

[0037] The transition bonding layer is composed of metal oxide nanoparticles modified with silane coupling agent and epoxy resin, with a thickness of 1–3 μm.

[0038] The intermediate functional layer is a wear-resistant and friction-reducing layer formed by blending silicon carbide nanoparticles and polytetrafluoroethylene, with a thickness of 3–8 μm.

[0039] The dense surface layer is generated in situ from titanium dioxide / graphene composite nanomaterials via a sol-gel method, and has a thickness of 1–3 μm.

[0040] Secondly, the entire fluid contact surface of the impeller 103 (including the blade working surface, back surface, hub outer edge, and inner flow channel area of ​​the front and rear cover plates 102) is covered with a carefully designed nanocomposite coating. This coating is not of uniform thickness, but rather gradient-controlled according to the fluid shear force, cavitation risk, and wear degree experienced by different areas of the impeller 103. Specifically, the inlet edge region (i.e., the part where liquid first enters the blade) and outlet edge region (i.e., the area where liquid is discharged at high speed) of the impeller 103 are subjected to high turbulence, high impact, and potential cavitation environments for extended periods, resulting in a nanocomposite coating thickness that is 15%–30% greater than that in the central blade region. This localized thickening strategy significantly enhances the erosion resistance, cavitation resistance, and wear resistance of key components, extending the overall service life of the impeller 103 while avoiding unnecessary material waste, thus balancing performance and cost.

[0041] The nanocomposite coating adopts a three-layer composite structure, namely a transition bonding layer, an intermediate functional layer, and a surface dense layer. The layers work together to achieve excellent adhesion, wear resistance, friction reduction, and chemical stability.

[0042] The transition bonding layer is directly coated onto the surface of the impeller 103 metal substrate. It is composed of metal oxide nanoparticles (such as Al2O3, ZrO2, etc.) modified with silane coupling agents and epoxy resin through in-situ dispersion and composite, with a thickness controlled at 1–3 μm. This layer forms a chemical bridge between the inorganic nanoparticles and the organic resin through the silane coupling agent, which significantly improves the interfacial bonding strength between the coating and the substrate, effectively alleviates the internal stress caused by the difference in thermal expansion coefficients, and prevents the coating from peeling off.

[0043] The intermediate functional layer, located above the transition layer, has a thickness of 3–8 μm and is composed of high-hardness silicon carbide (SiC) nanoparticles uniformly dispersed in a polytetrafluoroethylene (PTFE) matrix. This layer combines high wear resistance with a low coefficient of friction: SiC provides mechanical reinforcement to resist the erosion of solid particles; PTFE imparts self-lubricating properties to the surface, significantly reducing fluid shear resistance, minimizing energy loss, and inhibiting dirt adhesion.

[0044] The outermost layer, a dense surface layer with a thickness of 1–3 μm, is formed in situ on the surface of the intermediate functional layer using titanium dioxide (TiO2) and graphene nanosheets via a sol-gel method. This layer has a dense structure and extremely low porosity, exhibiting excellent chemical inertness, corrosion resistance, and photocatalytic self-cleaning potential (it can decompose organic pollutants under light irradiation). The introduction of graphene not only improves the coating's density and thermal conductivity but also enhances its resistance to microcrack propagation, further ensuring the integrity of the coating during long-term operation.

[0045] The cleaning box 108 includes a box body 111, a partition 112, a sealing plate 113, and a box door 114. The partition 112 is fixed inside the box body 111. The sealing plate 113 is slidably connected to the partition 112 and is located on one side of the partition 112. The box body 111 is rotatably connected to the box body 111 and is located on one side of the box body 111.

[0046] The housing 111 has an overall rectangular or arc-shaped cavity structure, made of corrosion-resistant stainless steel or engineering plastic. One end of it is connected to the drain channel on the connector 106 or the front cover 101 to receive solid particles, fibers or other impurities scraped off the surface of the filter screen 107. The housing 111 has an internal mounting and positioning structure to ensure precise assembly of each component.

[0047] The partition 112 is fixedly installed inside the housing 111, usually vertically or at an angle. Its function is to divide the internal space of the housing 111 into two areas: one side is a temporary impurity storage area, and the other side is the area for the movement and guidance of the scraper 109. The partition 112 is provided with a sliding groove or guide rail structure to guide the smooth movement of the closing plate 113.

[0048] The sealing plate 113 is slidably connected to the partition plate 112 and can slide back and forth along the surface of the partition plate 112 in the horizontal or vertical direction. Under normal operating conditions, the sealing plate 113 is tightly attached to the partition plate 112, sealing any openings or gaps on the partition plate 112 to prevent unfiltered liquid or impurities from flowing back into the pump chamber. When cleaning or maintenance is required, the sealing plate 113 can be removed manually or pneumatically to open the passage, facilitating the discharge of impurities or cleaning of the housing 111. The edge of the sealing plate 113 may be equipped with an elastic sealing strip to further enhance the sealing effect when closed.

[0049] The door 114 is located on one side of the housing 111 (usually the outer side for easy operation) and is rotatably connected to the housing 111 via a hinge, pivot, or quick-release buckle, allowing the door 114 to rotate around an axis to open or close. This design facilitates periodic opening of the door 114 to clean accumulated impurities inside the housing 111, or to inspect and replace internal components (such as scraper 109 and partition 112).

[0050] The cleaning box 108 also includes a sealing ring 115, which is fixedly connected to the box door 114 and located between the box door 114 and the box body 111.

[0051] The sealing ring 115 is made of an oil-resistant, aging-resistant, and highly elastic material (such as fluororubber, silicone, or EPDM rubber), and is fixedly connected to the inner edge of the door 114, located at the mating surface between the door 114 and the housing 111. When the door 114 is closed, the sealing ring 115 is deformed under pressure, filling the microscopic gap between the door 114 and the housing 111, effectively preventing the pumped medium (especially corrosive or particulate liquids) from leaking from the gaps in the cleaning box 108, ensuring the sealing integrity and operational safety of the entire pump unit.

[0052] The scraper 109 includes a pressure plate 116, a brush 117, a first spring 118, and a support plate 119. The support plate 119 is fixed on the output end of the scraping cylinder 110. The pressure plate 116 is rotatably disposed on one side of the support plate 119. The first spring 118 is used to support the pressure plate 116. The brush 117 is fixed on the pressure plate 116 and contacts the filter screen 107.

[0053] The support plate 119 is a rigid metal or high-strength engineering plastic component, fixedly installed at the output end (i.e., the piston rod end) of the scraper cylinder 110, serving as the mounting base and force transmission carrier for the entire scraper 109 assembly. The support plate 119 typically has mounting holes, a pivot seat, and a spring positioning post for connecting other components and ensuring motion stability.

[0054] The pressure plate 116 is rotatably mounted on one side of the support plate 119 via a pin or hinge structure, allowing it to swing within a certain angle range relative to the support plate 119. This rotatable connection design gives the pressure plate 116 a certain degree of self-adaptability, enabling it to adjust its local posture during scraping based on minor deformations of the filter screen 107 surface, changes in deposit thickness, or installation errors. This ensures that it maintains good contact with the filter screen 107 at all times, preventing damage to the filter screen or incomplete scraping due to rigid pressure.

[0055] A first spring 118 is disposed between the support plate 119 and the pressure plate 116, with one end abutting against a spring seat on the support plate 119 and the other end acting on the back or middle of the pressure plate 116. This spring provides a constant preload, applying elastic pressure to the pressure plate 116 in the direction of the filter screen 107, ensuring that the brush 117 always presses against the filter screen surface with appropriate contact force. This elastic support mechanism not only compensates for manufacturing and assembly tolerances but also automatically adjusts the clamping force after the brush 117 wears, extending its service life and effectively preventing scratches on the filter screen due to excessive pressure or cleaning failure due to insufficient pressure.

[0056] The brush 117 is fixedly installed on the side of the pressure plate 116 facing the filter screen 107. Its material is preferably a highly wear-resistant, corrosion-resistant, and elastic engineering material, such as polypropylene, polyetheretherketone, or carbon fiber reinforced nylon. The brush 117 can employ straight bristles, spiral scrapers, or a composite brush-scraper structure, with its front end profile matching the surface shape of the filter screen 107 (e.g., flat, curved, or arc-shaped). Driven by the scraping cylinder 110, the brush 117 slides back and forth along the surface of the filter screen 107 with the pressure plate 116, efficiently peeling off attached particles, fibers, algae, or other contaminants, and pushing them into the cleaning box 108 for centralized collection.

[0057] The filter structure also includes a baffle 120 and a rotating component 121. The rotating component 121 is rotatably disposed on one side of the housing 111, and the baffle 120 is fixed on the rotating component 121. After the brush 117 moves the impurities to the bottom of the housing 111, the rotating component 121 is rotated to drive the baffle 120 to limit the impurities.

[0058] The rotating component 121 is rotatably mounted on one side of the housing 111 of the cleaning box 108 (usually located at the bottom of the housing 111 or near the drain port), and its structure is ingenious and responsive. The baffle 120 is fixedly connected to the rotating component 121 and is normally in an open or retracted state. When the brush 117 completes a scraping action and pushes the impurities to a designated area at the bottom of the housing 111, the rotating component 121 is triggered to rotate, causing the baffle 120 to swing downward or inward, forming a physical barrier that confines the collected impurities within a specific cavity, preventing impurities from being stirred up or flowing back to the filter screen 107 area due to liquid flow or equipment vibration, thereby ensuring the continuous and efficient operation of the filtration system.

[0059] The rotating component 121 includes a first gear 122, a second gear 123, a rack 124, and a rotational spring. The first gear 122 and the second gear 123 are rotatably disposed inside the housing 111 and mesh with each other. The rack 124 is fixed on the support plate 119 and meshes with the first gear 122. The baffle 120 is fixed on the second gear 123. The rotational spring is disposed on one side of the second gear 123 and is used to reset the second gear 123.

[0060] The first gear 122 and the second gear 123 are rotatably mounted inside the housing 111 via bearings or bushings, and mesh with each other to form a first-stage reduction or reversing transmission pair;

[0061] The rack 124 is fixedly mounted on the support plate 119 of the scraper 109 and moves back and forth synchronously with the extension and retraction of the scraping cylinder 110. The rack 124 meshes with the first gear 122. When the support plate 119 moves forward (scraping brush working stroke), the rack 124 pushes the first gear 122 to rotate, thereby driving the second gear 123 meshing with it to rotate in the opposite direction.

[0062] The baffle 120 is fixedly installed on the hub or extension arm of the second gear 123, so the rotation of the second gear 123 directly drives the baffle 120 to complete the limiting action;

[0063] A rotary spring is located on one side of the second gear 123, with one end fixed to the housing 111 and the other end acting on the second gear 123 or its shaft. When the scraping cylinder 110 retracts and the support plate 119 drives the rack 124 to move in the opposite direction, the first gear 122 reverses. However, due to the preload of the rotary spring, the second gear 123 can quickly return to its initial position, allowing the baffle 120 to lift or retract synchronously, making room for the next impurity collection and keeping the flow channel unobstructed.

[0064] The drive assembly 105 includes a drive motor 126, a drive shaft 127, and a sealing structure 128. The drive shaft 127 is fixedly connected to the impeller 103. The output end of the drive motor 126 is connected to the drive shaft 127. The sealing structure 128 is disposed on one side of the drive shaft 127.

[0065] The drive shaft 127 passes through the center of the rear cover plate 102 and is firmly connected to the impeller 103 by means of keyway, thread or interference fit to ensure efficient torque transmission.

[0066] The drive motor 126 is mounted outside the pump body, and its output end is connected to the drive shaft 127 via a coupling or direct coupling to provide stable rotational power.

[0067] The sealing structure 128 is located at the point where the drive shaft 127 passes through the rear cover plate 102. It can be a mechanical seal, a packing seal or a magnetic seal, preferably a double-end mechanical seal or a cartridge mechanical seal, to effectively prevent the pumped medium from leaking along the axial direction and ensure the safe operation of the equipment. It is especially suitable for conveying corrosive, toxic or high-value liquids.

[0068] In summary, this invention achieves closed-loop control of the filtration and cleaning process by integrating the baffle 120 limiting mechanism with the gear-rack 124 linkage system. Simultaneously, the optimized configuration of the drive component 105 ensures the reliability of the overall power transmission and the safety of the seals. The overall structure is compact, highly automated, and adaptable, significantly improving the long-term operational stability and maintenance convenience of the centrifugal pump in complex media environments.

[0069] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A high-efficiency centrifugal pump impeller device with a nanocomposite coating, characterized in that, It includes a front cover plate, a rear cover plate, an impeller, a filter structure, and a drive assembly. The drive assembly is disposed on the rear cover plate, the impeller is connected to the output shaft of the drive assembly, and the front cover plate is closed with the rear cover plate. The filter structure includes a connector, a filter screen, a cleaning box, a scraper, and a scraping cylinder. The connector is connected to the front cover plate, the filter screen is disposed on the connector, the cleaning box is fixed to one side of the filter screen, the scraper is slidably disposed on the filter screen, and the output end of the scraping cylinder is connected to the scraper.

2. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 1, characterized in that, The inlet area of ​​the front cover is provided with a flow guide rib, and the extension direction of the flow guide rib is at an acute angle to the incoming flow direction.

3. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 2, characterized in that, The impeller is provided with a nanocomposite coating, which covers the fluid contact surface of the impeller body. The thickness of the nanocomposite coating in the inlet and outlet regions of the impeller is 15%–30% greater than that in the middle region of the blade.

4. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 3, characterized in that, The nanocomposite coating comprises a transition bonding layer, an intermediate functional layer, and a surface dense layer; The transition bonding layer is composed of metal oxide nanoparticles modified with silane coupling agent and epoxy resin, with a thickness of 1–3 μm. The intermediate functional layer is a wear-resistant and friction-reducing layer formed by blending silicon carbide nanoparticles and polytetrafluoroethylene, with a thickness of 3–8 μm. The dense surface layer is generated in situ from titanium dioxide / graphene composite nanomaterials via a sol-gel method, and has a thickness of 1–3 μm.

5. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 4, characterized in that, The cleaning box includes a box body, a partition, a sealing plate, and a box door. The partition is fixed inside the box body. The sealing plate is slidably connected to the partition and located on one side of the partition. The box door is rotatably connected to the box body and located on one side of the box body.

6. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 5, characterized in that, The cleaning box also includes a sealing ring, which is fixedly connected to the box door and located between the box door and the box body.

7. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 6, characterized in that, The scraper includes a pressure plate, a brush, a first spring, and a support plate. The support plate is fixed to the output end of the scraping cylinder. The pressure plate is rotatably disposed on one side of the support plate. The first spring is used to support the pressure plate. The brush is fixed to the pressure plate and contacts the filter screen.

8. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 7, characterized in that, The filter structure also includes a baffle and a rotating component. The rotating component is rotatably disposed on one side of the housing, and the baffle is fixed on the rotating component. After the brush moves the impurities to the bottom of the housing, the rotating component is rotated to drive the baffle to limit the impurities.

9. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 8, characterized in that, The rotating component includes a first gear, a second gear, a rack, and a rotary spring. The first gear and the second gear are rotatably disposed in the housing and mesh with each other. The rack is fixed to the support plate and meshes with the first gear. The baffle is fixed on the second gear. The rotary spring is disposed on one side of the second gear and is used to reset the second gear.

10. The high-efficiency centrifugal pump impeller device with a nanocomposite coating as described in claim 9, characterized in that, The drive assembly includes a drive motor, a drive shaft, and a sealing structure. The drive shaft is fixedly connected to the impeller, the output end of the drive motor is connected to the drive shaft, and the sealing structure is disposed on one side of the drive shaft.

Images