Screen sedimentation centrifuge rotor with carbide wear-resistant layer

Abstract

The utility model provides a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer, and belongs to the technical field of centrifugal separation, the rotor for the screen sedimentation centrifuge with the carbide wear-resistant layer comprises a rotary drum and a spiral piece, the spiral piece is arranged on the rotary drum, the spiral piece comprises a spiral blade and a spiral barrel, and the spiral blade is arranged on the spiral barrel. The spiral blade is arranged on the spiral barrel, the spiral piece is used for scraping solid-phase particles deposited on the inner wall of the rotary drum through the spiral blade through rotation, and the spiral piece is used for generating centrifugal force through rotation so that the solid-phase particles in materials can be transferred to the inner wall of the rotary drum under the action of the centrifugal force; and the target part is arranged on at least one of the inner wall of the rotary drum, the spiral blade and the spiral barrel and is used for being in contact with the solid-phase particles. The utility model can effectively resist strong erosion and abrasion of materials, obviously prolong the service life of the rotor, reduce the maintenance and replacement frequency of equipment, and reduce the long-term operation cost of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal separation technology, specifically relating to a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer. Background Technology

[0002] In many fields of modern industry, such as chemical, mining, pharmaceutical, and environmental protection, the separation and purification of materials are crucial production processes. Screen sedimentation centrifuges, with their high-efficiency separation performance, are widely used in these fields. They use the powerful centrifugal force generated by high-speed rotation to separate solid particles from liquids in materials, thereby meeting the requirements of subsequent production processes. In the field of centrifugal separation technology, screen sedimentation centrifuges play a critical role, and the performance of their rotors directly affects the overall efficiency and service life of the centrifuge. In existing technologies, to improve the wear resistance of the rotor, alumina ceramic sheets are often attached to the surface of the rotor's spiral and drum.

[0003] However, this traditional protective method has many insurmountable defects and shortcomings. First, the connection between the alumina ceramic discs and the rotor structure mainly relies on adhesives, and the bonding strength of this method is relatively limited. Under the long-term high-speed operation of the centrifuge and the complex and ever-changing material scouring environment, the ceramic discs are prone to detachment. Once the ceramic discs detach, the rotor structure will be exposed to harsh working conditions without any protection, which will greatly reduce the rotor's wear resistance, seriously interfere with the normal operation of the centrifuge, significantly shorten its service life, increase the downtime and frequency of equipment maintenance, and pose a great challenge to the continuity of production for enterprises.

[0004] Secondly, ceramic materials with high alumina content are inherently expensive, and their bonding process is complex and cumbersome. This requires not only professional technicians but also specialized bonding equipment and tools, which undoubtedly increases the manufacturing cost of the equipment significantly. From a long-term operating cost perspective, the high material costs and complex maintenance costs (frequent repairs due to ceramic tile detachment) impose a heavy economic burden on enterprises.

[0005] Furthermore, alumina ceramics have relatively poor toughness. During centrifuge operation, if subjected to significant impact, such as from hard foreign objects in the material or impacts during equipment start-up and shutdown, the ceramic sheets are prone to breakage. Breakage not only results in the loss of wear-resistant protection, but fragments may also contaminate the material, polluting its quality and further reducing the reliability and stability of the entire centrifugal separation process.

[0006] Furthermore, existing rotor wear-resistant protection technology based on alumina ceramic veneers is no longer sufficient to meet the requirements of screen sedimentation centrifuges in terms of high efficiency, stability, and low cost operation. Utility Model Content

[0007] Based on the problems existing in the prior art, this utility model proposes a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer. It has high hardness, high wear resistance and good chemical stability. Compared with traditional alumina ceramic sheets, its wear resistance is superior. It can effectively resist the strong scouring and wear of materials, significantly extend the service life of the rotor, reduce the frequency of equipment maintenance and replacement, and reduce the long-term operating cost of the equipment.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer, comprising a drum and a spiral component. The spiral component is disposed in the drum and includes spiral blades and a spiral cylinder. The spiral blades are disposed in the spiral cylinder. The spiral component is used to scrape off solid particles deposited on the inner wall of the drum by rotating through the spiral blades. The spiral component is also used to generate centrifugal force by rotating, causing the solid particles in the material to be transferred to the inner wall of the drum under the action of centrifugal force.

[0009] Preferably, the drum includes a large end assembly, a straight section, a conical section, a screen section, and a small end assembly. The large end assembly connects to the centrifuge's power unit and feeding device. The straight section provides a relatively stable centrifugal space where materials undergo initial stratification and sedimentation under centrifugal force. The conical section guides the material flow. The screen section screens the material. The small end assembly discharges the separated solid material. The spiral cylinder has radial gaps with the straight, conical, and screen sections. Specialized manufacturing processes are designed for the structural characteristics of different parts of the rotor. From material preparation and processing to cladding and assembly, each step is closely coordinated, ensuring the processing accuracy and quality of each part of the rotor while fully utilizing the advantages of the carbide wear-resistant layer, thus improving the overall performance of the rotor and enabling it to better adapt to the complex operating conditions of the screen sedimentation centrifuge.

[0010] Furthermore, the large end mount of the drum is located at one end of the drum and is bolted to one end of the straight section of the drum. The other end of the straight section of the drum is bolted to the conical section of the drum, which is then bolted to the screen section of the drum. The screen section of the drum is bolted to the small end mount of the drum. The small end mount of the drum is used to discharge solid materials. The spiral blades are used to propel the materials to move inside the centrifuge drum. The large end mount of the drum is made of high-strength aluminum alloy and has a reinforcing rib structure inside to enhance the overall rigidity and stability.

[0011] Preferably, both sides of the rotating drum screen section are provided with fixed frames. One side of the fixed frame is fixedly connected to the rotating drum conical section by bolts. The inner cavity of the fixed frame is movably connected to one end of the rotating drum screen section. The other side of the rotating drum screen section extends to the inner cavity of the small end of the rotating drum. One side of the small end of the rotating drum is movably connected to the rotating drum screen section by the fixed frame. A gear is fixedly connected to one side of the rotating drum screen section. A fixed seat is fixedly connected to the bottom of the small end of the rotating drum. A motor is fixedly connected to the bottom of the fixed seat. A gear is fixedly connected to the output end of the motor. The gear meshes with the gear. Further, the spiral blade is a conical structure. The diameter of one end of the spiral blade is adapted to the straight section of the rotating drum, and the diameter of the other end is adapted to the rotating drum screen section. The diameter of the middle section of the spiral blade is adapted to the conical section of the rotating drum. Further, the surface of the rotating drum screen section is provided with screen holes, and the shape of the screen holes is rectangular.

[0012] In traditional screen sedimentation centrifuges, the screen is usually stationary, and materials tend to accumulate on it under centrifugal force, especially viscous or irregularly shaped materials, which can easily clog the screen mesh and reduce separation efficiency. However, the rotation of the drum screen section causes the material to be constantly agitated and tumbled on the screen, making it difficult to form a stable accumulation state. This effectively prevents material from clogging the screen and ensures that the material can continuously and smoothly pass through the screen for separation. The rotational motion of the drum screen section alters the material flow field inside the drum. Due to its relatively independent rotation, when working in conjunction with other components such as the straight and conical sections of the drum, it can create a more complex and ordered flow field within the drum.

[0013] Preferably, the helical blades employ a variable cross-section twisted structure, where the thickness gradually decreases and the width gradually increases from the root to the tip, and the blades are twisted at a certain angle along the rotation direction. Guide strips are provided on the surface of the helical blades, extending along the length of the blades, with their depth and width gradually changing from the root to the tip, matching the variable cross-section structure of the blades. This structural design allows the material to be more evenly distributed within the rotor space after entering the centrifuge, reducing localized material accumulation and blockage, and improving material flowability and separation efficiency. Simultaneously, guide grooves are provided on the blade surface, extending along the length of the blades, with their depth and width gradually changing from the root to the tip, matching the variable cross-section structure of the blades. These guide grooves guide the material to flow along a specific path, further optimizing the material separation process and reducing direct impact and wear on the blades.

[0014] Preferably, the inner wall of the drum is provided with a plurality of baffles distributed along the axial direction of the flow channel. The baffles are arc-shaped, and their curvature is adapted to the flow channel wall surface. The surface of the baffles is coated with the same material as the carbide wear-resistant layer. The baffles can disrupt the laminar flow state of the material in the flow channel, so that the material is fully mixed and dispersed, and promotes the separation of different components in the material.

[0015] Furthermore, the inner cavity of the fixed frame is provided with an arc-shaped groove, and both ends of the rotating drum screen segment are fixedly connected with connecting parts. The side of the connecting part away from the rotating drum screen segment extends into the inner cavity of the arc-shaped groove. The connecting part and the arc-shaped groove are slidably connected. Both ends of the rotating drum screen segment extend into the interior of the arc-shaped groove through the connecting parts, so that it can rotate inside the arc-shaped groove. Under the drive of the motor, the rotating drum screen segment can be rotated.

[0016] Preferably, the carbide wear-resistant layer is formed by cladding carbide powder onto the rotor structure surface using plasma cladding or laser cladding processes. The carbide powder is one or more combinations of tungsten carbide, titanium carbide, or chromium carbide.

[0017] Preferably, both the spiral component and the drum are made of high-strength alloy steel, and the wear-resistant layer formed during the cladding process of the carbide wear-resistant layer has a thickness of 1.5-5.0 mm.

[0018] Furthermore, the inner surface of the drum cone section is provided with spiral guide protrusions, which can guide the material to flow along a specific path during centrifugation, thereby promoting the separation of the material.

[0019] Compared with existing technologies, the advantages and positive effects of this utility model of a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer are as follows:

[0020] 1. The rotor of the screen sedimentation centrifuge with carbide wear-resistant layer of this utility model adopts plasma cladding or laser cladding process to clad carbide powder on the rotor surface. Carbide has high hardness, high wear resistance and good chemical stability. Compared with traditional alumina ceramic sheets, its wear resistance is better and can effectively resist the strong scouring and wear of materials, significantly extend the service life of the rotor, reduce the frequency of equipment maintenance and replacement, and reduce the long-term operating cost of the equipment.

[0021] 2. The cladding process used in the rotor of the screen sedimentation centrifuge with the carbide wear-resistant layer of this utility model enables the carbide wear-resistant layer to form a good metallurgical bond with the rotor structure. The bond strength is high and it is not easy to fall off, which improves the reliability and stability of the rotor and ensures the continuous and efficient operation of the centrifuge.

[0022] 3. The rotor of the screen sedimentation centrifuge with carbide wear-resistant layer of this utility model has a special manufacturing process designed for the structural characteristics of different parts of the rotor. From material cutting, processing to cladding and assembly, each link is closely coordinated, which not only ensures the processing accuracy and quality of each part of the rotor, but also gives full play to the advantages of the carbide wear-resistant layer, improves the overall performance of the rotor, and enables it to better adapt to the complex working conditions of the screen sedimentation centrifuge.

[0023] 4. The rotor of the screen sedimentation centrifuge with the carbide wear-resistant layer of this utility model adopts a carbide wear-resistant layer, such as tungsten carbide, titanium carbide, or chromium carbide, which has extremely high hardness. Its hardness value is usually much higher than that of traditional centrifuge rotor materials. When facing materials containing high-hardness particles, it can effectively resist the impact and erosion of particles, greatly reducing the wear on the rotor surface. The wear-resistant layer has good uniformity. By precisely controlling the plasma cladding or laser cladding process parameters, it can be ensured that the carbide wear-resistant layer is evenly distributed in all parts of the drum and screw components, without obvious thickness differences and defects. This allows the rotor to maintain consistent wear resistance as a whole, avoiding equipment imbalance and failure caused by excessively rapid local wear, and further improving the operational stability and reliability of the centrifuge.

[0024] 5. The carbide wear-resistant layer in the rotor of the screen sedimentation centrifuge of this utility model has a certain chemical stability and can resist the erosion of corrosive media such as acids and alkalis to a certain extent. For centrifuges that process corrosive materials in chemical, pharmaceutical and other industries, the rotor of this utility model can effectively prevent the reduction of structural strength and surface damage caused by corrosion. The carbide wear-resistant layer is formed on the surface of the drum and screw by plasma cladding or laser cladding process, which can form a good metallurgical bond between the wear-resistant layer and the substrate. This bonding method is different from the traditional coating bonding. Its bonding force is stronger. Under high-speed rotation, strong vibration and high stress working conditions, the wear-resistant layer is not easy to fall off.

[0025] 6. In the screen sedimentation centrifuge rotor of this utility model with carbide wear-resistant layer, the rotation of the rotor is driven by a motor to rotate the gear, which in turn drives the rotation of the gear disc, thereby causing the screen section of the drum to rotate. A sealing structure is provided at the bearing mating point to prevent material leakage. The rotation of the screen section of the drum can effectively prevent material from clogging on the screen and improve separation efficiency. At the same time, due to its relatively independent rotational motion, when working in conjunction with other drum components, it can further optimize the flow field distribution of material in the drum, making the material separation process more efficient and uniform.

[0026] 7. The rotor of the screen sedimentation centrifuge with carbide wear-resistant layer of this utility model addresses the issue that in traditional screen sedimentation centrifuges, the screen is usually stationary, and materials tend to accumulate on the screen under centrifugal force, especially highly viscous materials or materials with irregular particle shapes, which easily clog the screen mesh and reduce separation efficiency. However, the rotation of the drum screen section causes the material to be constantly agitated and tumbled on the screen, making it difficult to form a stable accumulation state. This effectively prevents material from clogging the screen and ensures that the material can continuously and smoothly pass through the screen for separation. The rotational motion of the drum screen section changes the material flow field inside the drum. Due to its relatively independent rotation, when it works in conjunction with components such as the straight section and conical section of the drum, it can create a more complex and orderly flow field within the drum. For example, after the material undergoes initial acceleration through the straight section of the drum, the flow field becomes more complex and ordered. When the material enters the rotating drum screen section, it is subjected to the tangential force generated by the rotation of the screen section, making the flow velocity and direction of the material within the screen section more uniform. This further promotes the separation of solid particles and liquids. This optimized flow field distribution improves the overall material separation efficiency of the centrifuge, making the separation process more efficient and uniform. Because the rotation of the drum screen section prevents material blockage, the uneven impact force on the screen during operation is reduced. In the case of a traditional fixed screen, material blockage will lead to increased local pressure, increasing the friction between the screen and the material, thereby accelerating the wear of the screen. The rotating screen section avoids this situation, extending the service life of the screen. It also reduces the energy consumed in overcoming blockage and uneven friction, reducing the energy consumption of the centrifuge and improving the overall economy of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the rotor of a screen sedimentation centrifuge with a carbide wear-resistant layer according to this utility model;

[0028] Figure 2 This is a three-dimensional schematic diagram of the rotor structure of a screen sedimentation centrifuge with a carbide wear-resistant layer according to this utility model;

[0029] Figure 3 This is a side perspective perspective view of the rotor structure of a screen sedimentation centrifuge with a carbide wear-resistant layer according to this utility model.

[0030] Figure 4 A schematic diagram of the spiral blade structure of the rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer according to this utility model;

[0031] Figure 5 This is a schematic diagram of the rotor drum screen section structure of a centrifuge with a carbide wear-resistant layer according to this utility model.

[0032] Figure 6This is a schematic flowchart illustrating the preparation method of the rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer according to this utility model.

[0033] The reference numerals in the attached drawings are as follows: 1. Spiral blade; 2. Spiral cylinder; 3. Large end of the drum; 4. Straight section of the drum; 5. Conical section of the drum; 6. Screen section of the drum; 7. Small end of the drum; 8. Fixing frame; 9. Gear disc; 10. Fixing base; 11. Motor; 12. Gear; 13. Baffle. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0036] This utility model adopts the following technical solution: a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer, comprising a drum and a spiral component. The spiral component is disposed on the drum and includes spiral blades and a spiral cylinder. The spiral blades are disposed on the spiral cylinder. The spiral component is used to scrape off solid particles deposited on the inner wall of the drum by rotating, and the spiral component is used to generate centrifugal force by rotating, causing the solid particles in the material to be transferred to the inner wall of the drum under the action of centrifugal force. Using the above technical solution, by setting the spiral component to scrape off solid particles deposited on the inner wall of the drum by rotating, and by generating centrifugal force by rotating, the spiral blades are welded to the spiral cylinder, which is coaxially arranged with the drum and located inside the drum. When the centrifuge is working, the drum rotates at a certain speed difference, realizing the pushing and further separation of the material.

[0037] Furthermore, the carbide wear-resistant layer is disposed on at least one of the inner wall of the drum, the spiral blades, and the spiral cylinder, and is used for the target part in contact with solid particles. The carbide wear-resistant layer is formed by carbide powder through a cladding process. Special manufacturing processes are designed for the structural characteristics of different parts of the rotor. From material preparation and processing to cladding and assembly, each link is closely coordinated, which not only ensures the processing accuracy and quality of each part of the rotor, but also gives full play to the advantages of the carbide wear-resistant layer, improves the overall performance of the rotor, and enables it to better adapt to the complex working conditions of the screen sedimentation centrifuge. In this technical solution, a carbide wear-resistant layer is disposed on at least one of the inner wall of the drum, the spiral blades, and the spiral cylinder, and is used for the target portion in contact with solid particles. The carbide wear-resistant layer is formed by cladding carbide powder through a cladding process. Plasma cladding or laser cladding is used to clad carbide powder onto the rotor surface. Carbides have high hardness, high wear resistance, and good chemical stability. Compared with traditional alumina ceramic sheets, their wear resistance is superior, effectively resisting strong erosion and wear from materials, significantly extending the rotor's service life, reducing equipment maintenance and replacement frequency, and lowering long-term operating costs. The carbide itself has a certain degree of chemical stability and can resist the erosion of corrosive media such as acids and alkalis to a certain extent. For centrifuges that process corrosive materials in industries such as chemical and pharmaceutical, the rotor of this utility model can effectively prevent the reduction of structural strength and surface damage caused by corrosion. The use of plasma cladding or laser cladding process to form a carbide wear-resistant layer on the surface of the drum and screw can form a good metallurgical bond between the wear-resistant layer and the substrate. This bonding method is different from the traditional coating bonding. Its bonding force is stronger. Under high-speed rotation, strong vibration and high stress working conditions, the wear-resistant layer is not easy to fall off.

[0038] Furthermore, the drum includes a large end assembly, a straight section, a conical section, a screen section, and a small end assembly. The large end assembly connects the centrifuge's power unit and feeding device. The straight section provides a relatively stable centrifugal space where materials undergo initial stratification and sedimentation under centrifugal force. The conical section guides the material flow, the screen section screens the material, and the small end assembly discharges the separated solid material. The spiral cylinder has radial gaps with the straight, conical, and screen sections. Special manufacturing processes were designed for the structural characteristics of different parts of the rotor. From material preparation and processing to cladding and assembly, each step is closely coordinated, ensuring the processing accuracy and quality of each part of the rotor while fully utilizing the advantages of the carbide wear-resistant layer, thus improving the overall performance of the rotor and enabling it to better adapt to the complex operating conditions of the screen sedimentation centrifuge.

[0039] The large end of the drum is made of high-strength aluminum alloy casting, with internal reinforcing ribs to enhance overall rigidity and stability. The straight section of the drum is forged from stainless steel, a process that makes its internal structure more uniform and dense, resulting in excellent comprehensive mechanical properties. The conical section of the drum is made of titanium alloy, which is lightweight, high-strength, and has good corrosion resistance. The inner surface of the conical section features spiral-shaped guide protrusions that guide the material along a specific path during centrifugation, preventing material accumulation or blockage and improving separation efficiency. A nano-tungsten carbide coating is applied to the surface of the guide protrusions, providing high hardness and wear resistance, effectively protecting them from wear during long-term contact with materials. The screen section uses special stainless steel wire mesh that has undergone nitriding treatment, forming a high-hardness nitrided layer that improves the mesh's wear and corrosion resistance. A thermal spray coating is then applied to the nitrided mesh. The alumina-titanium oxide ceramic coating further enhances the wear and corrosion resistance of the screen. Its porous structure facilitates rapid passage of liquids through the screen, improving separation efficiency. The small end of the drum is made of integrally forged alloy steel, with a compact design that effectively reduces material retention at the end. A removable hard alloy wear-resistant liner is installed at the material contact point on the small end of the drum. When the wear liner wears to a certain extent, it can be easily replaced, reducing maintenance costs. The surface of the wear liner is machined with tiny grooves, which act as a guide during material discharge, ensuring smoother material flow.

[0040] The large end mount and small end mount of the drum are located at both ends of the drum, respectively, and are used to connect with other components of the centrifuge and ensure the installation stability of the drum. The straight section of the drum is the main cylindrical part of the drum, which provides a large material settling space. The conical section of the drum guides the material flow and separation. Its cone angle is designed according to the material characteristics and separation requirements. The screen section of the drum is located at a specific position of the drum and is used to achieve preliminary solid-liquid separation. Its screen aperture is selected according to the particle size of the material being processed.

[0041] Preferably, the large end mount of the drum is located at one end of the drum and is bolted to one end of the straight section of the drum. The other end of the straight section of the drum is bolted to the conical section of the drum. The conical section of the drum is then bolted to the screen section of the drum. The screen section of the drum is bolted to the small end mount of the drum. The small end mount of the drum is used to discharge solid materials. The spiral blades are used to push the materials to move inside the centrifuge drum. The large end mount of the drum is made of high-strength aluminum alloy and has a reinforcing rib structure inside to enhance the overall rigidity and stability.

[0042] In another embodiment, fixed frames are provided on both sides of the rotating drum screen section. One side of the fixed frame is fixedly connected to the rotating drum cone section by bolts. The inner cavity of the fixed frame is movably connected to one end of the rotating drum screen section. The other side of the rotating drum screen section extends to the inner cavity of the small end of the rotating drum. One side of the small end of the rotating drum is movably connected to the rotating drum screen section by the fixed frame. A toothed disc is fixedly connected to one side of the rotating drum screen section. A fixed seat is fixedly connected to the bottom of the small end of the rotating drum. A motor is fixedly connected to the bottom of the fixed seat. A gear is fixedly connected to the output end of the motor. The gear meshes with the toothed disc. Further, the spiral blade is a conical structure. The diameter of one end of the spiral blade is adapted to the straight section of the rotating drum, and the diameter of the other end is adapted to the rotating drum screen section. The diameter of the middle section of the spiral blade is adapted to the cone section of the rotating drum. Further, screen holes are opened on the surface of the rotating drum screen section. The shape of the screen holes is a rectangular structure.

[0043] In traditional screen sedimentation centrifuges, the screen is usually stationary, and materials tend to accumulate on it under centrifugal force, especially highly viscous or irregularly shaped materials, which can easily clog the screen mesh and reduce separation efficiency. However, the rotation of the drum screen section causes the material to be constantly agitated and tumbled on the screen, making it difficult to form a stable accumulation state. This effectively prevents material from clogging the screen and ensures that the material can continuously and smoothly pass through the screen for separation. The rotation of the drum screen section changes the material flow field inside the drum. Due to its relatively independent rotation, when it works in conjunction with components such as the straight section and conical section of the drum, it can create a more complex and ordered flow field within the drum. For example, after the material undergoes initial acceleration in the straight section of the drum, it enters the rotating drum screen section. When the material is rotated, it is subjected to tangential force generated by the rotation of the screen section, making the flow velocity and direction of the material within the screen section more uniform, further promoting the separation of solid particles and liquid. This optimized flow field distribution improves the material separation efficiency of the entire centrifuge, making the separation process more efficient and uniform. Because the rotation of the rotating drum screen section prevents material blockage, the uneven impact force on the screen during operation is reduced. In the case of a traditional fixed screen, material blockage will lead to an increase in local pressure, increasing the friction between the screen and the material, thereby accelerating the wear of the screen. The rotating screen section avoids this situation, extending the service life of the screen, and also reducing the energy consumed to overcome blockage and uneven friction, reducing the energy consumption of the centrifuge and improving the overall economy of the equipment.

[0044] Preferably, the helical blades adopt a variable cross-section twisted structure, where the thickness of the blades gradually decreases and the width gradually increases from the root to the tip, and the blades are twisted at a certain angle along the direction of rotation. Guide strips are provided on the surface of the helical blades, extending along the length of the blades, with their depth and width gradually changing from the root to the tip, matching the variable cross-section structure of the blades. This structural design allows the material to be more evenly distributed within the rotor space after entering the centrifuge, reducing localized material accumulation and blockage, and improving material flowability and separation efficiency. Simultaneously, guide grooves are provided on the surface of the blades, extending along the length of the blades, with their depth and width gradually changing from the root to the tip, matching the variable cross-section structure of the blades. These guide grooves can guide the material to flow along a specific path, further optimizing the material separation process and reducing direct impact and wear on the blades.

[0045] Furthermore, the inner wall of the drum is provided with multiple baffles distributed along the axial direction of the flow channel. The baffles are arc-shaped, and their curvature is adapted to the flow channel wall surface. The surface of the baffles is coated with the same material as the carbide wear-resistant layer. The baffle structure is composed of multiple baffles distributed along the axial direction of the flow channel. The baffles are arc-shaped, and their curvature is adapted to the flow channel wall surface. The surface of the baffles is coated with the same material as the carbide wear-resistant layer. The baffles can disrupt the laminar flow state of the material in the flow channel, so that the material is fully mixed and dispersed, and promotes the separation of different components in the material.

[0046] The inner cavity of the fixed frame is provided with an arc-shaped groove. Both ends of the rotating drum screen segment are fixedly connected to a connecting part. The side of the connecting part away from the rotating drum screen segment extends into the inner cavity of the arc-shaped groove. The connecting part and the arc-shaped groove are slidably connected. Both ends of the rotating drum screen segment extend into the interior of the arc-shaped groove through the connecting part, so that it can rotate inside the arc-shaped groove. Driven by the motor, the rotating drum screen segment can be rotated.

[0047] Furthermore, the spiral blade has a conical structure, with the diameter of one end of the spiral blade matching the straight section of the drum, the diameter of the other end matching the screen section of the drum, and the diameter of the middle section of the spiral blade matching the conical section of the drum.

[0048] The spiral component is used to scrape off solid particles deposited on the inner wall of the drum by rotating the spiral blades. The spiral component is also used to generate centrifugal force by rotating the spiral, so that the solid particles in the material are transferred to the inner wall of the drum under the action of centrifugal force. The spiral blades are welded to the spiral cylinder body, which is coaxially arranged with the drum and located inside the drum. When the centrifuge is working, the drum rotates at a certain speed difference to realize the pushing and further separation of the material.

[0049] The surface of the rotary drum screen section has screen holes with a rectangular shape. The screen holes are used to screen materials, ensuring the screening efficiency. The screen hole diameter is selected according to the particle size of the material being processed.

[0050] Furthermore, the carbide wear-resistant layer is formed by cladding carbide powder onto the rotor structure surface using plasma cladding or laser cladding processes. The carbide powder is one or more combinations of tungsten carbide, titanium carbide, or chromium carbide.

[0051] It has high hardness, high wear resistance and good corrosion resistance, which can effectively resist the scouring and wear of materials and protect the drum and screw parts. During the cladding process, by precisely controlling the cladding process parameters, such as cladding power, cladding speed and powder feeding rate, a good metallurgical bond is formed between the carbide wear-resistant layer and the drum and screw parts, ensuring that the wear-resistant layer will not fall off during high-speed rotation and severe wear.

[0052] Preferably, both the spiral component and the drum are made of high-strength alloy steel, and the thickness of the wear-resistant layer formed during the cladding process is 1.5-5.0 mm.

[0053] Furthermore, the inner surface of the drum cone section is provided with spiral guide protrusions, which can guide the material to flow along a specific path during centrifugation, thereby promoting the separation of the material.

[0054] A method for preparing a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer includes the following steps:

[0055] Step S1: Fabrication of the spiral component. First, the steel plates for the spiral cylinder and spiral blades are cut. The spiral cylinder is rolled and bent into the designed shape. The spiral blades are pressed by a forming machine. Then, the spiral blades are welded onto the spiral cylinder. Next, the whole structure is heat-treated to eliminate welding stress and improve material properties. Then, it is machined to meet the design dimensional accuracy requirements. Then, plasma cladding or laser cladding is used to clad the front, back and outer edges of the blades. Finally, the outer edge of the spiral component is ground to make its surface smooth and flat and ensure dimensional accuracy.

[0056] Step S2: Fabrication of the large end assembly and small end assembly of the drum. First, a blank is obtained through casting process, and then it is machined to produce the required precise dimensions and shapes for the connection parts, installation parts, etc., so that they meet the design requirements for size and shape accuracy.

[0057] Step S3: Fabrication of the straight section and conical section of the drum. First, cut the cylindrical steel plate and the flanges at both ends. Weld the cylindrical steel plate and the flanges at both ends into one piece. Perform heat treatment to eliminate welding stress. Then perform machining to ensure the dimensional accuracy of the inner diameter, outer diameter and length of the straight section and the conical section of the drum. Then, use plasma cladding or laser cladding process to clad the inside of the straight section and the conical section of the drum. Finally, grind the inner diameter to ensure the smoothness and dimensional accuracy of the inner wall.

[0058] Step S4: Fabrication of the drum screen segment. First, the cylinder steel plate and the flanges at both ends are cut and welded together. After heat treatment, they are machined. The required holes are made on the cylinder. Plasma cladding or laser cladding is used to clad the inner wall outside the holes. Then, carbide grid strips are attached to the clad inner wall. Finally, the inner diameter is ground to ensure the overall performance and dimensional accuracy of the drum screen segment.

[0059] The rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer according to this invention is further described below with reference to specific embodiments.

[0060] In some embodiments, this utility model provides a rotor for a screen sedimentation centrifuge with a carbide wear-resistant layer, including a drum and a spiral component. The spiral component is disposed on the drum and includes spiral blades 1 and a spiral cylinder 2. The spiral blades 1 are disposed on the spiral cylinder 2. The spiral component is used to scrape off solid particles deposited on the inner wall of the drum by rotating through the spiral blades 1, and the spiral component is used to generate centrifugal force by rotating to transfer solid particles in the material to the inner wall of the drum under the action of centrifugal force. The carbide wear-resistant layer is disposed on at least one of the inner wall of the drum, the spiral blades 1, and the spiral cylinder 2 for contacting solid particles. The carbide wear-resistant layer is formed by a cladding process of carbide powder. The drum includes a large end mount 3, a straight section 4, a conical section 5, a screen section 6, and a small end mount 7. The large end mount 3 is used for... The centrifuge's power unit and feeding device are connected. The straight section 4 of the drum provides a relatively stable centrifugal space. Under the action of centrifugal force, the material undergoes preliminary stratification and sedimentation. The conical section 5 of the drum is used to guide the flow of the material. The screen section 6 of the drum is used to screen the material. The small end assembly 7 of the drum is used to discharge the separated solid material. The spiral cylinder 2 has radial gaps with the straight section 4, conical section 5, and screen section 6 of the drum. The large end assembly 3 of the drum is located at one end of the drum and is bolted to one end of the straight section 4. The other end of the straight section 4 is bolted to the conical section 5 of the drum. The conical section 5 is then bolted to the screen section 6 of the drum. The screen section 6 is bolted to the small end assembly 7 of the drum. The small end assembly 7 of the drum is used to discharge the solid material. The spiral blades 1 are used to push the material to move inside the centrifuge drum.

[0061] Among them, carbide materials, such as tungsten carbide, titanium carbide, and chromium carbide, are widely used in industrial wear-resistant applications due to their extremely high hardness and wear resistance. These materials can not only effectively resist the impact and erosion of high-hardness particles, but also have good chemical stability, remaining stable in corrosive environments such as acids and alkalis.

[0062] This embodiment utilizes plasma cladding or laser cladding to deposit carbide powder onto the surface of a centrifuge rotor, forming a robust, wear-resistant layer. Compared to traditional alumina ceramic sheets, this wear-resistant layer exhibits superior wear resistance and chemical stability, significantly extending the rotor's lifespan and reducing equipment maintenance and replacement frequency. Furthermore, the cladding process is a crucial step in rotor fabrication. Both plasma cladding and laser cladding involve melting carbide powder at high temperatures and bonding it to the rotor's substrate material. Each process has its advantages: plasma cladding offers high deposition efficiency and applicability, while laser cladding is known for its precise control and smaller heat-affected zone. During the cladding process, precise control of parameters such as power, speed, and gas flow rate ensures the uniformity and bonding strength of the wear-resistant layer. This excellent metallurgical bond prevents the wear-resistant layer from detaching under high-speed rotation and high-stress environments, guaranteeing the rotor's reliability and stability.

[0063] In particular, considering the structural characteristics of different parts of the centrifuge rotor, attention should be paid to the uniform distribution of the wear-resistant layer on the drum and screw components during processing. By precisely controlling the process parameters of plasma cladding or laser cladding, it is ensured that the rotor maintains consistent wear resistance as a whole, avoiding equipment imbalance and malfunctions caused by excessively rapid local wear.

[0064] It should be noted that the screen sedimentation centrifuge rotor with the carbide wear-resistant layer in this embodiment has broad application potential in multiple industries:

[0065] In one possible scenario, it can be applied in chemical production, where many processes require handling materials containing corrosive or high-hardness particles. Traditional centrifuges are prone to failure under such conditions due to wear and corrosion, while rotors with carbide wear-resistant layers can effectively resist these adverse factors, ensuring long-term stable operation of the equipment.

[0066] In other possible applications, centrifuges can be used in mineral processing. They are commonly used to separate valuable metals or minerals from ores. Because ores often contain high-hardness particles, traditional rotors are prone to wear, while rotors with carbide wear-resistant layers offer longer service life and higher separation efficiency, reducing the cost of mineral processing.

[0067] In other possible applications, centrifuges can be used in the pharmaceutical industry to separate drug components or remove impurities. Because pharmaceutical processes demand high stability and reliability from equipment, rotors with carbide wear-resistant layers offer higher separation accuracy and longer equipment lifespan, meeting the stringent requirements of the pharmaceutical industry. It should be noted that this application does not specifically limit the application scenarios of rotors for screen sedimentation centrifuges with carbide wear-resistant layers; that is, those skilled in the art can adjust the type according to actual circumstances. The above examples are merely illustrative of the possible applications of rotors for screen sedimentation centrifuges with carbide wear-resistant layers in this application, but are not limited to the situations described in the above embodiments.

[0068] The large end mount 3 and the small end mount 7 of the drum are located at both ends of the drum, respectively, and are used to connect with other components of the centrifuge and ensure the installation stability of the drum. The straight section 4 of the drum is the main cylindrical part of the drum, which provides a large material settling space. The conical section 5 of the drum plays the role of guiding the material flow and separation. Its cone angle is designed according to the material characteristics and separation requirements. The screen section 6 of the drum is located at a specific position of the drum and is used to achieve preliminary solid-liquid separation. Its screen aperture is selected according to the particle size of the material being processed.

[0069] The rotating design of the drum screen section effectively prevents material from clogging the screen. In traditional centrifuges, the fixed screen is prone to reduced separation efficiency due to material accumulation, while the rotating screen section can continuously agitate and tumble the material, preventing accumulation and ensuring that the material can pass smoothly through the screen for separation.

[0070] Through rotational motion, the material flow field inside the drum is optimized. After initial acceleration in the straight section of the drum, the material enters the rotating drum screen section, where it is subjected to tangential force, resulting in a more uniform flow velocity and direction. This optimized flow field distribution improves the separation efficiency of solid particles and liquids, making the separation process more efficient and uniform.

[0071] The strong metallurgical bond between the carbide wear-resistant layer and the rotor substrate ensures the durability of the wear-resistant layer. Under conditions of high-speed rotation, strong vibration, and high stress, the wear-resistant layer is less prone to detachment, significantly improving the centrifuge's operational stability and reliability. Furthermore, the rotational motion of the drum screen section reduces uneven impact forces on the screen during operation, extending its service life. It also reduces the energy consumed in overcoming clogging and uneven friction, lowering the centrifuge's energy consumption and improving the overall economic efficiency of the equipment.

[0072] In some embodiments, this application may further include a rotating drum and a spiral component. The spiral component is disposed on the rotating drum and includes spiral blades 1 and a spiral cylinder 2. The spiral blades 1 are disposed on the spiral cylinder 2. The spiral component is used to scrape off solid particles deposited on the inner wall of the rotating drum by rotating through the spiral blades 1. The spiral component is also used to generate centrifugal force by rotating, causing the solid particles in the material to be transferred to the inner wall of the rotating drum under the action of centrifugal force. A carbide wear-resistant layer is disposed on at least one of the inner wall of the rotating drum, the spiral blades 1, and the spiral cylinder 2 for contacting the solid particles. The carbide wear-resistant layer is formed by a cladding process of carbide powder. The spiral blades 1 adopt a variable cross-section twisted structure, with the thickness of the blades gradually decreasing and the width gradually increasing from the root to the tip, and twisting at a certain angle along the rotation direction. Guide strips are provided on the surface of the spiral blades 1. The flow strip extends along the length of the blade, and its depth and width gradually change from the root to the tip, matching the variable cross-section structure of the blade. The inner wall of the drum is provided with multiple baffles 13 distributed along the flow channel axis. The baffles 13 are arc-shaped, and their curvature is adapted to the flow channel wall. The surface of the baffles 13 is coated with the same material as the carbide wear-resistant layer. The inner cavity of the fixed frame 8 is provided with an arc-shaped groove. Both ends of the drum screen section 6 are fixedly connected to the connecting part. The side of the connecting part away from the drum screen section 6 extends into the inner cavity of the arc-shaped groove. The connecting part and the arc-shaped groove are slidably connected. The surface of the drum screen section 6 is provided with screen holes. The screen holes are rectangular in shape. The carbide wear-resistant layer is formed by cladding carbide powder on the surface of the rotor structure using plasma cladding or laser cladding process. The carbide powder is one or more combinations of tungsten carbide, titanium carbide, or chromium carbide.

[0073] In some embodiments, this application may further include a rotating drum and a spiral component. The spiral component is disposed on the rotating drum and includes a spiral blade 1 and a spiral cylinder 2. The spiral blade 1 is disposed on the spiral cylinder 2. The spiral component is used to scrape off solid particles deposited on the inner wall of the rotating drum by rotating through the spiral blade 1. The spiral component is also used to generate centrifugal force by rotating, causing the solid particles in the material to be transferred to the inner wall of the rotating drum under the action of centrifugal force. A carbide wear-resistant layer is disposed on at least one of the inner wall of the rotating drum, the spiral blade 1, and the spiral cylinder 2 for contacting the solid particles. The carbide wear-resistant layer is formed by carbide powder through a cladding process. Both the spiral component and the rotating drum are made of high-strength alloy steel. The wear-resistant layer formed during the cladding process has a thickness of 1.5-5.0 mm. The inner surface of the rotating drum cone section 5 is provided with spiral-shaped flow-guiding protrusions. The flow-guiding protrusions can guide the material to flow along a specific path during centrifugation, promoting the separation of the material.

[0074] In some embodiments, the rotating drum screen segment 6 of this application is provided with fixing frames 8 on both sides. One side of the fixing frame 8 is fixedly connected to the rotating drum cone segment 5 by bolts. The inner cavity of the fixing frame 8 is movably connected to one end of the rotating drum screen segment 6. The other side of the rotating drum screen segment 6 extends to the inner cavity of the rotating drum small end mount 7. One side of the rotating drum small end mount 7 is movably connected to the rotating drum screen segment 6 by the fixing frame 8. A gear disk 9 is fixedly connected to one side of the rotating drum screen segment 6. A fixing seat 10 is fixedly connected to the bottom of the rotating drum small end mount 7. A motor 11 is fixedly connected to the bottom of the fixing seat 10. A gear 12 is fixedly connected to the output end of the motor 11. The gear 12 meshes with the gear disk 9. When the centrifuge starts, the motor 11 begins to run. The output shaft of the motor 11 drives the gear 12 to rotate, and the gear 12 drives the gear disc 9 to rotate. The gear disc 9 is connected to the rotating drum screen section 6, transmitting power to the rotating drum screen section 6, which in turn drives the rotating drum screen section 6 to rotate around its axis. During this process, because the rotating drum screen section 6 is slidably connected to the rotating drum straight section 4 and rotating drum conical section 5, the rotating drum screen section 6 can rotate relatively independently. At the same time, the sealing structure ensures that the material will not leak out through the gaps during the rotation of the rotating drum screen section 6, ensuring the normal operation of the centrifuge and the sealing of the material separation process.

[0075] In the case of a traditional fixed screen, material blockage can lead to increased local pressure and friction between the screen and the material, thus accelerating screen wear. The rotating screen section avoids this, extending the screen's service life. It also reduces the energy consumed in overcoming blockage and uneven friction, lowering the centrifuge's energy consumption and improving the overall economy of the equipment.

[0076] In some embodiments, the spiral component in this application may be manufactured as follows.

[0077] First, the steel plates for the spiral cylinder 2 and spiral blades 1 are cut. The spiral cylinder 2 is rolled and bent to the designed shape. The spiral blades 1 are formed by a forming machine. Then, the spiral blades 1 are welded onto the spiral cylinder 2. Next, overall heat treatment is performed to eliminate welding stress and improve material properties. After that, machining is performed to achieve the designed dimensional accuracy requirements. Then, plasma cladding or laser cladding is used to clad the front, back, and outer edge of the blades. Finally, the outer edge of the spiral component is ground to make its surface smooth and flat and ensure dimensional accuracy. For the fabrication of the large end assembly 3 and the small end assembly 7 of the drum, a blank part is first obtained through casting. Then, it is machined to produce the required precise dimensions and shapes for the connection parts, installation parts, etc., to achieve the designed dimensional and shape accuracy requirements. For the fabrication of the straight section 4 and the conical section 5 of the drum, the cylinder steel plate and the flanges at both ends are first cut. The cylinder steel plate and the flanges at both ends are then cut. The flanges are welded together and heat-treated to eliminate welding stress. Then, they are machined to ensure the dimensional accuracy of the inner diameter, outer diameter, and length of the straight section 4 and the conical section 5 of the drum. Then, plasma cladding or laser cladding is used to clad the interior of the straight section 4 and the conical section 5 of the drum. Finally, the inner diameter is ground to ensure the smoothness and dimensional accuracy of the inner wall. For the production of the drum screen section 6, the cylinder steel plate and the flanges at both ends are cut and welded together. After heat treatment, they are machined. The required holes are opened on the cylinder. The inner wall outside the holes is clad using plasma cladding or laser cladding. Then, carbide grid strips are attached to the clad inner wall. Finally, the inner diameter is ground to ensure the overall performance and dimensional accuracy of the drum screen section 6. After the screw and the drum are assembled together according to the design requirements, they undergo rigorous trial testing. Once all performance indicators are qualified, the rotor production is complete.

[0078] In some embodiments, during the manufacturing process of the spiral component, the steel plates of the spiral cylinder 2 and the spiral blade 1 are first precisely cut according to the design requirements. After the cutting is completed, the spiral cylinder 2 is placed on a bending machine and bent according to the designed radius of curvature to form the shape of the spiral cylinder 2. The spiral blade 1 is then formed by a special forming machine. The formed spiral blade 1 is welded onto the spiral cylinder 2. During the welding process, the welding parameters must be strictly controlled to ensure the welding quality. After welding, the entire spiral component is heat-treated to eliminate the stress generated by welding and improve the microstructure and properties of the material. After heat treatment, machining is performed to process the key dimensions of the spiral component, such as the shaft hole and the connecting parts, to ensure the assembly accuracy with other components. Then, using plasma cladding or laser cladding equipment, carbide powder is clad onto the front, back and outer edge of the spiral blade 1 according to the optimized process parameters. After cladding, the outer edge of the spiral component is ground by grinding equipment to make its surface achieve the design requirements for roughness and dimensional accuracy.

[0079] For the large end assembly 3 and the small end assembly 7 of the drum, casting molds are made according to the design drawings. Molten metal is poured into the molds and cooled and solidified to obtain blanks. After cleaning, grinding and other pretreatments, bolt holes, positioning surfaces and other parts for connection with other components are machined by machining equipment to ensure installation accuracy and connection reliability.

[0080] The fabrication of the straight section 4 and the conical section 5 of the drum involves first cutting the cylindrical steel plate and the flanges at both ends, then welding the cylindrical steel plate to the flanges at both ends. During welding, appropriate welding processes and welding sequences are used to reduce welding deformation. After welding, heat treatment is performed to eliminate welding stress. After heat treatment, machining is performed to machine the inner diameter, outer diameter, and connection points with other components of the straight section 4 and the conical section 5 of the drum. Then, plasma cladding or laser cladding is used to clad the interior of the straight section 4 and the conical section 5 of the drum with carbide powder. After cladding, the inner diameter is ground to ensure the smoothness and dimensional accuracy of the inner wall, reducing the resistance and wear of the material flowing inside.

[0081] The manufacturing process of the rotary drum screen section 6 involves first cutting and welding the cylindrical steel plate and the flanges at both ends into a single unit, then performing heat treatment and machining to achieve the required external dimensions and connection points. Holes are then drilled on the cylindrical body according to the design requirements. After the holes are drilled, plasma cladding or laser cladding is used to clad the inner wall outside the holes with carbide powder. After cladding, a high-temperature resistant and high-strength adhesive is applied to the cladding layer, and the carbide grid strips are then attached to the inner wall. Finally, the inner diameter is ground to ensure the overall performance and dimensional accuracy of the rotary drum screen section 6, enabling the material to be smoothly screened and separated by sedimentation within the rotary drum screen section 6.

[0082] During the assembly of the screw and the drum, the screw is installed inside the drum according to the design requirements. The gap and relative position between the two are adjusted, and they are fastened together by bolts and other connecting parts. After the assembly is completed, the rotor is installed on the centrifuge for trial operation. During the trial operation, the rotor speed, vibration, temperature rise and other performance indicators are monitored. If all indicators meet the design requirements, the rotor is completed and can be put into use.

[0083] The working principle of the rotor of the screen sedimentation centrifuge with carbide wear-resistant layer is as follows: 1. When the screen sedimentation centrifuge is running, the material is first transported into the high-speed rotating drum through the feed pipe. The drum rotates at a speed of thousands of revolutions per minute under the drive of the centrifuge, generating a strong centrifugal force. Under the action of centrifugal force, the solid particles in the material are quickly thrown towards the drum wall. Since the straight section 4 of the drum provides a large settling space, the larger solid particles begin to settle at this point.

[0084] 2. As the material inside the drum is continuously filled and rotated, the material gradually moves towards the drum cone section 5. The special shape design of the drum cone section 5 guides the material to flow and separate further, so that the solid particles continue to settle along the wall of the drum cone section 5 and gather towards the small end of the drum 7.

[0085] 3. At the same time, the spiral component inside the drum is also rotating at a relatively small speed difference compared to the drum. The rotation of the spiral component mainly pushes the solid particles deposited on the drum wall toward the small end of the drum 7 for subsequent discharge. During the pushing process, the spiral blade 1 continuously rubs against the material, and the carbide wear-resistant layer on its surface effectively resists this friction and wear.

[0086] 4. When the material passes through section 6 of the rotating drum screen, the liquid portion is thrown out of the drum through the screen openings under the action of centrifugal force, achieving preliminary solid-liquid separation. The solid particles are trapped on the inner surface of the screen and continue to be pushed to the discharge port by the screw component.

[0087] 5. When the centrifuge starts, the motor 11 begins to run. The output shaft of the motor 11 drives the gear 12 to rotate, and the gear 12 drives the gear disc 9 to rotate. The gear disc 9 is connected to the rotating drum screen section 6, transmitting power to the rotating drum screen section 6, which in turn drives the rotating drum screen section 6 to rotate around its axis. During this process, since the rotating drum screen section 6 is slidably connected to the rotating drum straight section 4 and the rotating drum conical section 5, the rotating drum screen section 6 can rotate relatively independently. At the same time, the sealing structure ensures that the material will not leak out through the gaps during the rotation of the rotating drum screen section 6, ensuring the normal operation of the centrifuge and the sealing of the material separation process.

[0088] It is understood that the specific expressions involved in this utility model, such as "multiple", "and / or", "first", "second", as well as various directional words and terms such as "connection", all have their unique and rich connotations, which are worth analyzing and understanding in depth.

[0089] In the context of this utility model, the term "multiple" explicitly means two or more. This definition plays a crucial guiding role in situations involving quantity descriptions. For example, when referring to "multiple components," it means that the number of components involved is at least two. It covers all possible quantities starting from two components, providing a broad and clear scope for setting the number of components in the technical solution. This definition helps to consider application scenarios of different scales and complexities during the design and implementation process. Whether it is a relatively simple two-component combination or a more complex multi-component integrated system, it can be effectively planned and described based on the concept of "multiple."

[0090] The adjective "and / or" represents three relationships that provide rich expressions for the diversity of technical solutions. Taking A and / or B as an example, the existence of A alone means that under certain specific operating modes, conditions, or application scenarios, only element A functions, while B is inactive or irrelevant. For instance, in an energy-saving mode of a device, it may rely solely on the specific function of component A to maintain basic operation and reduce energy consumption. The simultaneous existence of A and B indicates that under most routine or specific complex operating conditions, A and B cooperate and complement each other to achieve the technical goal. For example, in a data processing system, A is responsible for the initial screening and organization of data, while B performs in-depth analysis and mining; their collaborative work improves the efficiency and accuracy of data processing. The existence of B alone indicates that under certain special circumstances, B can independently undertake the technical task, while A can be temporarily shelved or not involved at all. The existence of these three relationships allows technical solutions to flexibly adapt to different needs and environmental changes, greatly enhancing the adaptability and practicality of utility models.

[0091] The core purpose of terms like "first" and "second" is to distinguish information of the same type, rather than to define a specific order or degree of importance. In the description of technical solutions, the use of these terms helps to clearly categorize various types of information. For example, when describing data collected by multiple sensors, labeling them as "first sensor data" and "second sensor data" is merely to clearly distinguish data from different sources in subsequent data analysis, processing, and technical logic construction, and does not imply that the first sensor data is more important than the second sensor data, or that there is a strict order in which they were collected. In fact, without departing from the scope of this utility model, the names "first information" and "second information" are completely interchangeable. This fully reflects the flexibility and non-sequential nature of these terms in information classification, avoiding misunderstandings and unnecessary restrictions that may arise from the use of these terms.

[0092] Directional terms such as "center," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used. These indicate a relative reference system based on the accompanying drawings. Their main function is to facilitate a clear description of this embodiment and simplify the overall description process. For example, when referring to a component as being "inside" the device, it is relative to the overall external outline of the device. This relative directional description allows technicians to quickly understand the approximate location of the component within the overall device structure, rather than implying a fixed, unchanging orientation in absolute space. Similarly, descriptions of "longitudinal" and "lateral" are based on the device form or technical flow presented in the accompanying drawings. In actual manufacturing, installation, or use, the device may be rotated, inverted, or adjusted according to the site, supporting equipment, and other practical conditions. These directional terms provide a relative, easily understood, and communicative means of describing positional relationships, rather than a strict limitation on the actual orientation of the device or component in space.

[0093] The term "connection" has a broad scope. It includes both direct connections where no other components exist, often characterized by high rigidity, stability, and direct signal or energy transmission. For example, in high-precision electronic circuits, direct soldering between chips and pins ensures fast and accurate signal transmission along the shortest path, reducing signal attenuation and interference. Conversely, "connection" also includes indirect connections where other components are present. This indirect connection is extremely common in complex mechanical systems or large industrial equipment. For instance, a power source connects to working parts via intermediate components such as drive shafts or couplings. These intermediate components can serve various functions, including buffering, speed regulation, and force direction modification, enabling the entire system to adapt to different working requirements and conditions. This comprehensive definition of "connection" allows for flexible selection of appropriate connection methods based on specific functional requirements, structural layouts, and performance requirements during the design and implementation of technical solutions. Whether pursuing efficient and direct connections or achieving complex functional integration through intermediate components, effective planning and operation can be carried out within the framework of the concept of "connection."

[0094] The description of the operation sequence presented in the accompanying drawings of this utility model is as follows. Although the operation flow is shown in a specific order in the drawings, this should not be construed as an absolute and unchangeable execution requirement. In the modern technological environment, especially with the increasing power of multitasking and parallel computing, the implementation of the technical solution can be flexibly adjusted according to the actual situation. For example, on an automated production line, some operation steps may appear as a sequential sequence in the theoretical flowchart, but under the actual intelligent control system scheduling, if equipment resources allow and it does not affect the final product quality and production safety, some operations can be carried out in parallel. This flexibility allows the utility model to better adapt to various factors such as different production scales, equipment configurations, and time cost requirements, avoiding problems such as inefficiency or resource waste caused by rigidly following the operation sequence in the drawings, and fully leveraging the maximum potential of the technical solution in different application scenarios.

[0095] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the technical concepts disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0096] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A rotor for a screen bowl centrifuge having a carbide wear layer, characterized in that: The screw includes a spiral blade (1) and a spiral cylinder (2), the spiral blade (1) is arranged on the spiral cylinder (2), the screw is used for scraping the solid-phase particles deposited on the inner wall of the rotating drum through the spiral blade (1) by rotating, and the screw is used for generating centrifugal force by rotating so that the solid-phase particles in the material are transferred to the inner wall of the rotating drum under the action of the centrifugal force.

2. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 1, characterized in that The rotating drum includes a rotating drum large end assembly (3), a rotating drum straight section (4), a rotating drum tapered section (5), a rotating drum screen section (6) and a rotating drum small end assembly (7); The rotating drum large end assembly (3) is used for connecting the power device and the feeding device of the centrifugal machine; The rotating drum straight section (4) provides a relatively stable centrifugal space, and the material is preliminarily layered and settled under the action of the centrifugal force; The rotating drum tapered section (5) is used for guiding the flow direction of the material; The rotating drum screen section (6) is used for screening the material; The rotating drum small end assembly (7) is used for discharging the separated solid material.

3. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 2, wherein, The spiral cylinder (2) has a gap in the radial direction with the rotating drum straight section (4), the rotating drum tapered section (5) and the rotating drum screen section (6).

4. The rotor of the screen bowl centrifuge with a carbide wear-resistant layer according to claim 2, wherein the rotating drum large end assembly (3) is located at one end of the rotating drum and is connected to one end of the rotating drum straight section (4) by bolts; The other end of the rotating drum straight section (4) is connected to the rotating drum tapered section (5) by bolts, and the rotating drum tapered section (5) is connected to the rotating drum screen section (6) by bolts; The rotating drum screen section (6) is connected to the rotating drum small end assembly (7) by bolts, and the rotating drum small end assembly (7) is used for discharging the solid material; The spiral blade (1) is used for pushing the material to move in the rotating drum of the centrifugal machine. Both sides of the rotating drum screen section (6) are provided with fixed frames (8), one side of the fixed frame (8) is fixedly connected to the rotating drum tapered section (5) by bolts, the inner cavity of the fixed frame (8) is movably connected to one end of the rotating drum screen section (6), the other side of the rotating drum screen section (6) extends into the inner cavity of the rotating drum small end assembly (7), one side of the rotating drum small end assembly (7) is movably connected to the rotating drum screen section (6) through the fixed frame (8), one side of the rotating drum screen section (6) is fixedly connected with a toothed disc (9), the bottom of the rotating drum small end assembly (7) is fixedly connected with a fixed seat (10), the bottom of the fixed seat (10) is fixedly connected with a motor (11), the output end of the motor (11) is fixedly connected with a gear (12), and the gear (12) is engaged with the toothed disc (9); 5. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 2, characterized in that: The inner cavity of the fixed frame (8) is provided with an arc-shaped groove, both ends of the rotating drum screen section (6) are fixedly connected with connecting parts, and one side of the connecting part away from the rotating drum screen section (6) extends into the inner cavity of the arc-shaped groove, and the connecting part and the arc-shaped groove are in sliding connection. ​ 6. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 2, characterized in that: The spiral blade (1) adopts a variable cross-section twist structure, the thickness of the blade gradually decreases from the root to the tip, the width gradually increases, and the blade twists at a certain angle along the rotation direction, the spiral blade (1) is provided with a guide strip on the surface, the guide strip extends along the length direction of the blade, the depth and width of the guide strip gradually change from the root to the tip, and the guide strip is matched with the variable cross-section structure of the blade.

7. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 2, characterized in that: The inner wall of the rotating drum is provided with a plurality of axial distribution baffles (13) composed of flow channels, the baffles (13) are arc-shaped, the curvature of the baffles (13) is matched with the wall surface of the flow channel, and the surface of the baffles (13) is coated with the same material as the carbide wear-resistant layer.

8. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 2, characterized in that: The spiral blade (1) is a conical structure, one end of the spiral blade (1) is matched with the straight section (4) of the rotating drum, the other end is matched with the screen section (6) of the rotating drum, and the middle section of the spiral blade (1) is matched with the conical section (5) of the rotating drum.

9. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 3, characterized in that: The carbide wear-resistant layer is formed by plasma cladding or laser cladding process on the surface of the rotor structure, and the carbide powder is one or a combination of tungsten carbide, titanium carbide or chromium carbide.

10. A rotor for a screen bowl centrifuge having a carbide wear layer according to claim 3, characterized in that: The spiral part and the rotating drum are made of high-strength alloy steel, and the wear-resistant layer formed in the cladding process has a thickness of 1.5-5.0mm.

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