Centrifugal fan impeller structure with laser cladded wear-resistant layer

Abstract

The utility model provides a kind of centrifugal fan impeller structure with laser cladding wear-resistant layer.The centrifugal fan impeller structure with laser cladding wear-resistant layer includes: a plurality of the blade body equidistant installation in the position of the front face of hub near outer surface, the blade body includes blade, composite wear plate and laser cladding wear-resistant material, the composite wear plate is wrapped in the outer surface of blade, the laser cladding wear-resistant material is set in the windward area of blade body, the laser cladding wear-resistant material is tungsten carbide base composite powder.The centrifugal fan impeller structure with laser cladding wear-resistant layer provided by the utility model, the service life of impeller is greatly extended by the design, the problem of fast wear and tear and short service life under high dust content working condition can be solved, only the key area prone to damage is subjected to laser cladding strengthening, the overall consumption of high-strength wear-resistant material is reduced, the wear-resistant modification expenditure is reduced, the high dust content harsh working condition can also be stably adapted, and the continuous and stable operation of centrifugal fan is ensured.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan impeller technology, and in particular to a centrifugal fan impeller structure with a laser-clad wear-resistant layer. Background Technology

[0002] Centrifugal fans are fluid machines that rely on centrifugal force to do work. Their core components include an impeller, casing, and motor. During operation, the motor drives the impeller to rotate at high speed, causing the gas in the impeller channel to be thrown out by centrifugal force. A negative pressure is formed at the center of the impeller to draw in new gas, which is then guided by the casing to achieve gas pressurization and transportation. It features high air pressure and stable flow rate and is widely used in industrial ventilation, building ventilation, dust removal and desulfurization, heat exchange and other scenarios. It can meet the needs of different fields for gas transportation, pressurization or exhaust and is a common general-purpose machine in production and daily life.

[0003] The centrifugal fan impeller is the core rotating component of the fan, consisting of blades, hub, and front disc. Driven by a motor, it rotates at high speed, applying centrifugal force and thrust to the gas through the blades, enabling the gas to gain kinetic and pressure energy. At the same time, it guides the airflow from the center of the impeller to the edge, providing the core power for gas pressurization and delivery. The shape, angle, and size of its blades directly determine the fan's air pressure, flow rate, and efficiency, making it a key component for ensuring stable gas delivery.

[0004] When a centrifugal fan impeller is running under high dust conditions, the windward surface of the impeller blades is eroded by the dust-laden airflow, especially at higher wind speeds where the airflow velocity is high and the impact energy of the particles is strong, which will accelerate the wear of the blades.

[0005] Therefore, it is necessary to provide a centrifugal fan impeller structure with a laser-clad wear-resistant layer to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides a centrifugal fan impeller structure with a laser-clad wear-resistant layer, which solves the problem that the impeller blades of centrifugal fans will wear faster when subjected to dusty airflow and strong impact at high wind speeds under high dust conditions.

[0007] To solve the above-mentioned technical problems, the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model includes: a hub;

[0008] Multiple blade bodies are installed at equal intervals on the front of the hub near the outer surface. Each blade body includes a blade, a composite wear-resistant plate, and a laser-clad wear-resistant material. The composite wear-resistant plate is wrapped around the outer surface of the blade, and the laser-clad wear-resistant material is disposed in the windward area of ​​the blade body. The laser-clad wear-resistant material is tungsten carbide-based composite powder.

[0009] The front disc is disposed on the front of multiple blade bodies, and the front of the hub is provided with a mounting shaft at the middle position.

[0010] Laser cladding wear-resistant materials are applied to the windward area of ​​the composite wear-resistant plate in the blade body using laser cladding technology. The laser cladding wear-resistant materials have high hardness and can effectively resist the high-frequency, high-kinetic-energy erosion of dust particles, significantly reducing the local wear rate.

[0011] Preferably, the composite wear-resistant plate is made of NM400 wear-resistant alloy steel plate, and the thickness of the composite wear-resistant plate is 3-5mm;

[0012] Composite wear-resistant plates serve as the first layer of wear-resistant barrier.

[0013] Preferably, the laser cladding wear-resistant material has a streamlined curved surface structure, the thickness of the laser cladding wear-resistant material is 1-2 mm, and the width of the laser cladding wear-resistant material is in the range of 100 mm-300 mm;

[0014] The width of the laser cladding wear-resistant material varies from top to bottom, depending on the specific requirements. The laser cladding wear-resistant material needs to cover the high-wind-speed area on the windward side of the blade.

[0015] Preferably, the windward side of the blade body has an interface at one end, and one side of the inner wall of the interface has multiple through holes.

[0016] Preferably, the other side of the blade body has multiple mounting ports, and each mounting port is provided with a sealing component inside;

[0017] The sealing assembly is glued to the mounting port with a soluble adhesive to ensure the flatness of the other side of the blade body, and the mounting port and the through-hole are positioned accordingly.

[0018] Preferably, the sealing assembly includes a sealing structure and a bayonet, the bayonet being formed at one end of the sealing structure;

[0019] The bayonet and fixing component are snapped together at one end inside the mounting port.

[0020] Preferably, a support plate is installed inside the interface by multiple fixing components, and the other side of the support plate is provided with laser-clad wear-resistant material;

[0021] The support plate is made of the same material as the composite wear-resistant plate, and the fixing components are inserted into the mounting port through the through-hole.

[0022] Preferably, the fixing component includes multiple connecting structures and multiple limiting structures, the multiple connecting structures are installed at corresponding positions on the back of the support plate, and the limiting structures and connecting structures are threadedly connected.

[0023] Compared with related technologies, the centrifugal fan impeller structure with laser-clad wear-resistant layer provided by this utility model has the following beneficial effects:

[0024] This invention provides a centrifugal fan impeller structure with a laser-clad wear-resistant layer. To extend the service life of the windward side of the blade body, a composite wear-resistant plate is used to wrap the blade, initially increasing the overall wear resistance of the blade. Then, a layer of laser-clad wear-resistant material is applied to the windward area of ​​the composite wear-resistant plate on the outer surface of the blade using laser cladding technology. The laser-clad wear-resistant material composed of tungsten carbide is more wear-resistant. During fan operation, the wear-prone areas of the blade body are effectively protected by the new material, even at high wind speeds, thus extending the impeller's service life. This design significantly extends the impeller's lifespan and solves the problems of rapid wear and short service life under high dust conditions. Laser cladding reinforcement is only applied to vulnerable key areas, reducing the overall consumption of high-strength wear-resistant materials, lowering wear-resistant modification costs, and ensuring stable adaptation to harsh high-dust conditions, guaranteeing the continuous and stable operation of the centrifugal fan. Attached Figure Description

[0025] Figure 1 A schematic diagram of the first embodiment of the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model;

[0026] Figure 2 A structural schematic diagram of the laser cladding wear-resistant material is provided for this utility model;

[0027] Figure 3 This invention provides a schematic diagram of the impeller fluid flow direction;

[0028] Figure 4 A schematic diagram of the second embodiment of the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model;

[0029] Figure 5 A structural schematic diagram of the sealing assembly is provided for this utility model;

[0030] Figure 6 A structural schematic diagram of the support plate is provided for this utility model;

[0031] Figure 7 Provided for this utility model Figure 5 An enlarged view of point A shown;

[0032] Figure 8 Provided for this utility model Figure 5 A magnified view of point B shown.

[0033] The following are the labels in the diagram: 1. Hub, 2. Front disc, 3. Mounting shaft, 4. Blade body, 401. Blade, 402. Composite wear-resistant plate, 403. Laser cladding wear-resistant material, 5. Sealing assembly, 501. Sealing structure, 502. Bayonet, 6. Fixing assembly, 601. Connecting structure, 602. Limiting structure, 7. Support plate, 8. Interlocking interface, 9. Mounting port, 10. Through hole. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] First Embodiment

[0036] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic diagram of the first embodiment of the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model; Figure 2 A structural schematic diagram of the laser cladding wear-resistant material is provided for this utility model; Figure 3 This invention provides a schematic diagram of the impeller fluid flow direction. The centrifugal fan impeller structure with laser-clad wear-resistant layer includes: a hub 1;

[0037] Multiple blade bodies 4 are installed at equal intervals on the front surface of the hub 1 near the outer surface. Each blade body 4 includes a blade 401, a composite wear-resistant plate 402, and a laser-clad wear-resistant material 403. The composite wear-resistant plate 402 is wrapped around the outer surface of the blade 401. The laser-clad wear-resistant material 403 is disposed in the windward area of ​​the blade body 4. The laser-clad wear-resistant material 403 is a tungsten carbide-based composite powder.

[0038] The front disc 2 is disposed on the front of multiple blade bodies 4, and the front of the hub 1 is provided with a mounting shaft 3 in the middle position.

[0039] Laser cladding wear-resistant material 403 is applied to the windward area of ​​composite wear-resistant plate 402 in blade body 4 using laser cladding technology. Laser cladding wear-resistant material 403 has high hardness and can effectively resist the high-frequency and high-kinetic energy erosion of dust particles, significantly reducing the local wear rate. Mounting shaft 3 is used to fix hub 1 in the corresponding position. Hub 1, front plate 2, blade body 4 and mounting shaft 3 form a complete centrifugal fan impeller. Blade body 4 has a certain curvature, and the concave surface of blade body 4 is the windward surface.

[0040] The composite wear-resistant plate 402 is made of NM400 wear-resistant alloy steel plate, and the thickness of the composite wear-resistant plate 402 is 3-5mm.

[0041] The composite wear-resistant plate 402 serves as the first wear-resistant barrier, initially withstanding the scouring and wear of the dust-laden airflow, thus providing basic protection for the subsequent localized reinforcement layers.

[0042] Please refer to Figure 2 The laser cladding wear-resistant material 403 has a streamlined curved surface structure, a thickness of 1-2 mm, and a width ranging from 100 mm to 300 mm.

[0043] The width of the laser cladding wear-resistant material 403 varies from top to bottom, depending on the specific requirements. The laser cladding wear-resistant material 403 needs to cover the high wind speed area on the windward side of the blade.

[0044] The working principle of the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model is as follows:

[0045] The blade 401 is wrapped with a composite wear-resistant plate 402, which initially increases the overall wear resistance of the blade 401. Then, a layer of laser cladding wear-resistant material 403 is applied to the windward area of ​​the composite wear-resistant plate 402 on the outer surface of the blade 401 using laser cladding technology. The laser cladding wear-resistant material 403, composed of tungsten carbide, is more wear-resistant. When the wind turbine is running, the wear-prone parts of the blade body 4 can be effectively slowed down even at high wind speeds under the protection of the new material, thereby extending the service life of the impeller.

[0046] Compared with related technologies, the centrifugal fan impeller structure with laser-clad wear-resistant layer provided by this utility model has the following beneficial effects:

[0047] To extend the service life of the impeller blades on the windward side, a composite wear-resistant plate 402 is used to wrap the blades 401, initially increasing the overall wear resistance of the blades 401. Then, a layer of laser-clad wear-resistant material 403 is applied to the windward area of ​​the composite wear-resistant plate 402 on the outer surface of the blades 401 using laser cladding technology. The laser-clad wear-resistant material 403, composed of tungsten carbide, is more wear-resistant. During fan operation, the wear-prone areas of the blade body 4 are effectively protected by the new material, even at high wind speeds, thus extending the impeller's service life. This design significantly extends the impeller's lifespan, solving the problems of rapid wear and short service life under high dust conditions. Laser cladding reinforcement is only applied to vulnerable key areas, reducing the overall consumption of high-strength wear-resistant materials, lowering wear-resistant modification costs, and ensuring stable adaptation to harsh high-dust conditions, guaranteeing the continuous and stable operation of the centrifugal fan.

[0048] Second Embodiment

[0049] Please refer to the following: Figures 4-5 - Figures 6-7 - Figure 8 , Figure 4A schematic diagram of the second embodiment of the centrifugal fan impeller structure with laser cladding wear-resistant layer provided by this utility model; Figure 5 A structural schematic diagram of the sealing assembly is provided for this utility model; Figure 6 A structural schematic diagram of the support plate is provided for this utility model; Figure 7 Provided for this utility model Figure 5 An enlarged view of point A shown; Figure 8 Provided for this utility model Figure 5 The enlarged view at point B shows a centrifugal fan impeller structure with a laser-clad wear-resistant layer provided in the first embodiment of this application. The second embodiment of this application proposes another centrifugal fan impeller structure with a laser-clad wear-resistant layer. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0050] Specifically, the difference in the centrifugal fan impeller structure with laser-clad wear-resistant layer provided in the second embodiment of this application is that, please refer to... Figure 6 and Figure 7 The blade body 4 has an interface 8 at one end on its windward side, and a plurality of through holes 10 are provided on one side of the inner wall of the interface 8.

[0051] The perforation 10 extends to the other side of the blade body 4.

[0052] Please refer to Figure 5 , Figure 6 and Figure 7 The other side of the blade body 4 is provided with a plurality of mounting ports 9, and a sealing component 5 is provided inside each mounting port 9;

[0053] The sealing assembly 5 is glued to the mounting port 9 with a soluble adhesive to ensure the flatness of the other side of the blade body 4. The mounting port 9 and the through port 10 are positioned correspondingly.

[0054] Please refer to Figure 7 and Figure 8 The sealing assembly 5 includes a sealing structure 501 and a bayonet 502, wherein the bayonet 502 is provided at one end of the sealing structure 501;

[0055] The bayonet 502 and the fixing component 6 are snapped together at one end inside the mounting port 9, and the sealing structure 501 is made of the same material as the composite wear-resistant plate 402.

[0056] Please refer to Figure 5 , Figure 6 and Figure 7 The interface 8 is equipped with a support plate 7 by multiple fixing components 6, and the other side of the support plate 7 is provided with laser cladding wear-resistant material 403;

[0057] The support plate 7 is made of the same material as the composite wear-resistant plate 402, and the fixing component 6 is inserted into the mounting port 9 through the through hole 10.

[0058] Please refer to Figure 5 and Figure 7 The fixing component 6 includes multiple connecting structures 601 and multiple limiting structures 602. The multiple connecting structures 601 are installed on the back of the support plate 7 at corresponding positions, and the limiting structures 602 and the connecting structures 601 are threaded together.

[0059] The limiting structure 602 is located inside the mounting port 9.

[0060] Compared with related technologies, the centrifugal fan impeller structure with laser-clad wear-resistant layer provided by this utility model has the following beneficial effects:

[0061] To facilitate replacement after damage to the heavily worn area on the windward side of the blade body 4, an interface 8 is created in the stress area of ​​the windward side of the blade body 4. Multiple through-holes 10 are then inserted from one side of the inner wall of the interface 8 to the other side of the blade body 4. A layer of laser-clad wear-resistant material 403 is applied to one side of the support plate 7, which corresponds to the shape of the interface 8, using laser cladding technology. After completion, the support plate 7 can be fixed inside the interface 8 by the fixing component 6 on the other side, ensuring that the surface is flush and the joint is neat. The mounting port 9 on the other side of the blade body 4 is sealed by the adhesive sealing component 5 for easy disassembly. When the laser-clad wear-resistant material 403 on one side of the support plate 7 is severely worn, the sealing component 5 can be removed and the fixing component 6 can be separated to remove the support plate 7 for replacement. This design allows for independent replacement of the blade body 4 after wear in the windward area, reducing maintenance costs.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A centrifugal fan impeller structure with a laser-clad wear-resistant layer, characterized in that, include: Wheel hub; Multiple blade bodies are installed at equal intervals on the front of the hub near the outer surface. Each blade body includes a blade, a composite wear-resistant plate, and a laser-clad wear-resistant material. The composite wear-resistant plate is wrapped around the outer surface of the blade, and the laser-clad wear-resistant material is disposed in the windward area of ​​the blade body. The laser-clad wear-resistant material is tungsten carbide-based composite powder. The front disc is disposed on the front of multiple blade bodies, and the front of the hub is provided with a mounting shaft at the middle position.

2. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 1, characterized in that, The composite wear-resistant plate is made of NM400 wear-resistant alloy steel plate, and the thickness of the composite wear-resistant plate is 3-5mm.

3. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 1, characterized in that, The laser cladding wear-resistant material has a streamlined curved surface structure, a thickness of 1-2 mm, and a width ranging from 100 mm to 300 mm.

4. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 1, characterized in that, The blade body has an interface at one end on its windward side, and one side of the inner wall of the interface has multiple through holes.

5. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 1, characterized in that, The blade body has multiple mounting ports on its other side, and each mounting port is equipped with a sealing component.

6. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 5, characterized in that, The sealing assembly includes a sealing structure and a bayonet, with the bayonet located at one end of the sealing structure.

7. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 4, characterized in that, The interface is internally supported by a support plate installed by multiple fixing components, and the other side of the support plate is provided with laser cladding wear-resistant material.

8. The centrifugal fan impeller structure with laser-clad wear-resistant layer according to claim 7, characterized in that, The fixing component includes multiple connecting structures and multiple limiting structures. The multiple connecting structures are installed at corresponding positions on the back of the support plate, and the limiting structures and connecting structures are threaded together.

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