Wear-resistant assembly for high-temperature centrifugal fan impeller

Abstract

The utility model provides a wear-resistant component for an impeller of a high-temperature centrifugal fan, which comprises a bearing bracket component, a blocking and protecting limiting component, an embedding and matching component, a shade covering and protecting component, a bearing joint component and a matching and lining component, and the wear-resistant component can directly shield and cover the impeller through the arrangement of a shade panel, so that the wear resistance of the impeller is improved, and the service life of the impeller is prolonged. The chance that the impeller is directly rubbed can be effectively reduced, so that the abrasion resistance of the impeller is remarkably improved, the position of the embedded end block can be adjusted in the limiting notch and can be kept stable through the design of the limiting notch and the trapezoidal cross section between the embedded end block and the blocking and protecting side edge and between the embedded end block and the bearing base plate, and the position of the embedded end block can be adjusted along the limiting notch. The wear-resisting assembly can be adjusted according to needs during installation, the bearing rubber layer and the lining rubber layer are arranged, the joint performance between the bearing supporting component and the impeller and the joint performance between the embedded end block and the bearing base plate are enhanced, and the overall strength and stability of the wear-resisting assembly are improved.

Description

Technical Field

[0001] The utility model relates to blower equipment, in particular to a wear-resistant component used for a high-temperature centrifugal blower impeller. Background Art

[0002] For the boilers of the secondary reheat units, in order to ensure the need for regulating the reheat steam temperature at low load, the steam temperature regulation of most secondary reheat unit boilers is mainly based on flue gas recirculation. Considering energy saving and consumption reduction and improving boiler efficiency, the flue gas recirculation system adopts the flue gas recirculation method of extracting flue gas from the economizer. The technical difficulty lies in the wear prevention of equipment such as the flue gas recirculation fan.

[0003] The flue gas recirculation fan is an important equipment in the secondary reheat boiler system. Its function is to provide a power source for high-temperature flue gas. Since the high-temperature flue gas contains a large amount of smoke and dust, the impeller is washed by the air-powder mixture for a long time, which is very easy to wear out and affect the safe production of the unit. The impeller of the flue gas recirculation fan needs to be properly anti-wear treated. There are generally many ways to make the impeller blades wear-resistant, and the most commonly used ones are wear-resistant welding rod (welding wire) surfacing, spraying cemented carbide, wear-resistant lining (steel plate) and ceramic lining.

[0004] Wear-resistant welding rod (welding wire) cladding is a process method that uses welding to deposit materials with certain properties on the surface of the workpiece. The thickness is generally 4-6mm, and the surface hardness of the cladding layer reaches HRC60-65. Because it is slowly piled up manually, it takes a long time for labor.

[0005] Spraying cemented carbide generally adopts two methods: thermal spraying and supersonic spraying. Thermal spraying cemented carbide is to use acetylene flame to melt the cemented carbide onto the surface of the workpiece. The thickness of the cemented carbide layer is generally 0.4-1mm, and the surface hardness can reach HRC60-65. Due to the use of hot melting method, and the different characteristics of the cemented carbide layer and the base material, the shrinkage is different during the cooling process, and cracks will appear in the cemented carbide layer. Supersonic spraying refers to the process of spraying the coating powder onto the substrate by supersonic gas and solid two-phase airflow at room temperature or lower temperature to form a dense coating. The surface hardness can reach HRC60-65, but the thickness of the supersonic spray layer is only 0.1-0.3mm.

[0006] Wear-resistant lining is an alloy wear-resistant layer formed by mechanical surfacing welding on ordinary steel plates, with a volume fraction of more than 50% Cr7C3 carbide as the main component. The thickness of the wear lining is generally 4+3 (4mm base steel plate + 3mm wear-resistant layer), and the surface hardness can reach HRC56-65. This kind of ceramic wear-resistant plate has a variety of thickness specifications, and generally uses a 6mm thickness specification. Because it is a non-metallic material, it needs glue to bond and is easy to fall off after long-term use.

[0007] Therefore, it is necessary to design a wear-resistant structure to overcome the above-mentioned defects. Utility Model Content

[0008] The utility model aims to provide a wear-resistant component for a high-temperature centrifugal fan impeller, so as to facilitate assembly and positioning and improve the wear resistance of the impeller.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] A wear-resistant component for a high-temperature centrifugal fan impeller, comprising:

[0011] A bearing support member, which is mounted on the impeller and has a bearing space inside;

[0012] A guarding and limiting component, which is installed on the bearing and supporting component and has a limiting space inside;

[0013] The chimeric matching component is installed between the protection and limiting component and the bearing and supporting component, the bearing and supporting component supports the chimeric matching component, and the protection and limiting component protects and limits the component;

[0014] A shielding and covering component is installed on the fitting and matching component, the fitting and matching component is used to position the shielding and covering component, and the shielding and covering component is used to shield and cover the impeller to improve the wear resistance of the impeller;

[0015] A load-bearing joint component is installed between the load-bearing support component and the impeller, and the load-bearing joint component assists in joining the load-bearing support component and the impeller;

[0016] The matching lining component is installed between the embedded matching component and the load-bearing support component, and the matching lining component assists in joining the embedded matching component and the load-bearing support component.

[0017] Specifically, the bearing support member includes:

[0018] The bearing seat plate is in the shape of an elongated strip, the bottom surface of which is in contact with the outer wall of the impeller, and a bearing space is formed on the top surface thereof.

[0019] The guarding and limiting components include:

[0020] A pair of guarding side edges are provided, each guarding side edge is installed on the edge of the bearing seat plate respectively, extends along the length direction of the bearing seat plate, and protrudes toward the outside of the bearing seat plate, and is surrounded by the guarding side edge and the bearing seat plate to form a limiting groove with a top width smaller than a bottom width.

[0021] The mating components include:

[0022] The interlocking end block is provided with a plurality of parts, each of which has a trapezoidal cross-section, adapted to the shape of the limiting slot, embedded in the limiting slot, and arranged sequentially along the length direction of the limiting slot, and the position can be adjusted along the limiting slot, and the interlocking end block is protected and limited by the protective side edge.

[0023] The shielding cover component comprises:

[0024] The shield panel is provided with a plurality of parts, each of which is located outside the shielding side edge and is engaged with the top of the embedded end block. The embedded end block positions the shield panel and the shield panel shields and covers the impeller.

[0025] The load bearing joint member comprises:

[0026] The bearing adhesive layer is filled between the bearing seat plate and the impeller, and the bearing seat plate and the impeller are bonded and adhered by the bearing adhesive layer.

[0027] The matching lining components include:

[0028] The lining adhesive layer is filled between the embedded end block and the bearing seat plate, and the embedded end block and the bearing seat plate are bonded and adhered by the lining adhesive layer.

[0029] In one embodiment of the utility model, the guard side edge and the bearing seat plate are integrally formed of metal plates, and the connecting portion between the bearing seat plate and the guard side edge is fixed to the outer wall of the impeller by welding.

[0030] In one embodiment of the present invention, the shield panel and the engaging end block are integrally formed of ceramic.

[0031] In one embodiment of the present invention, the supporting adhesive layer and the lining adhesive layer are made of high temperature resistant inorganic adhesive.

[0032] The advantages of the utility model are:

[0033] The wear-resistant component can directly shield and cover the impeller through the setting of the mask panel, which can effectively reduce the chance of the impeller being directly subjected to friction, thereby significantly improving its wear resistance. The design of the limiting groove and the trapezoidal cross-section between the embedded end block and the shielding side edge and the bearing seat plate allows the embedded end block to adjust its position within the limiting groove while maintaining stability, thereby ensuring the structural stability of the entire wear-resistant component. The embedded end block can adjust its position along the limiting groove, so that the wear-resistant component can be adjusted as needed during installation, and it is also convenient for subsequent maintenance and replacement. The setting of the bearing rubber layer and the lining rubber layer respectively enhances the bonding performance between the bearing support member and the impeller, and between the embedded end block and the bearing seat plate, thereby improving the overall strength and stability of the wear-resistant component. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front structural schematic diagram of the wear-resistant component for a high-temperature centrifugal fan impeller proposed by the utility model;

[0035] Figure 2 It is a schematic diagram of the back structure of the wear-resistant component. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0037] like Figure 1 , Figure 2 As shown, the wear-resistant assembly for the high-temperature centrifugal fan impeller proposed by the utility model includes a bearing support component, a guarding and limiting component, a fitting component, a shielding and covering component, a bearing joint component and a fitting lining component. The bearing support component is installed on the impeller and has a bearing space inside. The guarding and limiting component is installed on the bearing support component and has a limiting space inside. The fitting component is installed between the guarding and limiting component and the bearing support component. The bearing support component carries and supports the fitting component, and the guarding and limiting component The shield covering component is installed on the chimeric matching component, the chimeric matching component positions the shield covering component, and the shield covering component shields and covers the impeller to improve the wear resistance of the impeller, the load-bearing joint component is installed between the load-bearing support component and the impeller, the load-bearing joint component assists in the joint between the load-bearing support component and the impeller, the matching lining component is installed between the chimeric matching component and the load-bearing support component, the matching lining component assists in the joint between the chimeric matching component and the load-bearing support component.

[0038] In this embodiment, the bearing support member includes a bearing seat plate 100, which is in the shape of an elongated strip, with its bottom surface attached to the outer wall of the impeller and a bearing space formed on its top surface.

[0039] The guarding and limiting component includes a guarding side edge 200, which is provided with a pair. Each guarding side edge is respectively installed on the edge of the bearing seat plate. It extends along the length direction of the bearing seat plate and protrudes toward the outside of the bearing seat plate. The guarding side edge and the bearing seat plate form a limiting groove with a top width smaller than the bottom width.

[0040] The interlocking matching component includes an interlocking end block 300, which is provided with a plurality of parts. The cross-section of each interlocking end block is trapezoidal, adapted to the shape of the limiting slot, embedded in the limiting slot, and arranged in sequence along the length direction of the limiting slot. The position can be adjusted along the limiting slot, and the interlocking end block is protected and limited by the protective side edge.

[0041] The shield covering component includes a shield panel 400, which is provided with a plurality of parts. Each shield panel is located outside the shielding side edge and is engaged with the top of the embedded end block. The embedded end block positions the shield panel and shields and covers the impeller.

[0042] The bearing joint component includes a bearing adhesive layer 500 , which is filled between the bearing seat plate and the impeller, and is used to glue and bond the bearing seat plate and the impeller.

[0043] The matching lining component includes a lining adhesive layer 600, which is filled between the embedded end block and the bearing seat plate, and the embedded end block and the bearing seat plate are glued and bonded by the lining adhesive layer.

[0044] In this embodiment, the guard side edge and the bearing seat plate are integrally formed of metal plates, and the connecting portion between the bearing seat plate and the guard side edge is fixed to the outer wall of the impeller by welding.

[0045] In this embodiment, the shield panel and the engaging end block are integrally formed of ceramic.

[0046] In this embodiment, the supporting adhesive layer and the lining adhesive layer are made of high temperature resistant inorganic adhesive.

[0047] In this embodiment, CN-500 glue is used for the bearing adhesive layer and the lining adhesive layer. CN series adhesive is a composite adhesive developed by combining the advantages of inorganic adhesive and organic adhesive, and can withstand temperatures up to 500°C. Its main principle is to fix its tensile strength and tensile shear strength as the basis, abandon the traditional toughening and modification materials, and select toughening agents that can participate in the curing reaction, have good compatibility, and contain new activated toughness factors through a series of organizational variable experiments, so that the molecular structure of the adhesive not only contains significant toughening effects and good aging resistance, but also contains many flexible molecular connecting bonds. The most excellent performance of this adhesive is its resistance to sudden temperature changes, and its thermal expansion coefficient is always between steel and ceramics (9×10 -6m / mk), the unique toughness can well adjust the thermal shear force caused by the different thermal expansion coefficients of ceramics and metals, which ensures that the ceramics are not easy to fall off.

[0048] In this embodiment, the conveying medium of the impeller is high-temperature and high-dust flue gas, the normal operating temperature is 350-420°C, and the dust content of the flue gas is 12-40g / Nm 3 The main component of smoke is SiO2 (about 40-60%), A 12 O2 (about 13-25%), and Fe2O3 (7-15%), followed by CaO, MgO, Na2O, KaO, S03, TiO3, etc.

[0049] In the description of the present utility model, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A wear-resistant component for a high-temperature centrifugal fan impeller, characterized in that: include: A bearing support member, which is mounted on the impeller and has a bearing space inside; A guarding and limiting component, which is installed on the bearing and supporting component and has a limiting space inside; The chimeric matching component is installed between the protection and limiting component and the bearing and supporting component, the bearing and supporting component supports the chimeric matching component, and the protection and limiting component protects and limits the component; A shielding and covering component is installed on the fitting and matching component, the fitting and matching component is used to position the shielding and covering component, and the shielding and covering component is used to shield and cover the impeller; A load-bearing joint component is installed between the load-bearing support component and the impeller, and the load-bearing joint component assists in joining the load-bearing support component and the impeller; The matching lining component is installed between the embedded matching component and the load-bearing support component, and the matching lining component assists in joining the embedded matching component and the load-bearing support component.

2. A wear-resistant component for a high-temperature centrifugal fan impeller according to claim 1, characterized in that: The bearing support components include: The bearing seat plate is in the shape of an elongated strip, the bottom surface of which is in contact with the outer wall of the impeller, and a bearing space is formed on the top surface thereof.

3. A wear-resistant component for a high-temperature centrifugal fan impeller according to claim 2, characterized in that: The guarding and limiting components include: A pair of guarding side edges are provided, each guarding side edge is installed on the edge of the bearing seat plate respectively, extends along the length direction of the bearing seat plate, and protrudes toward the outside of the bearing seat plate, and is surrounded by the guarding side edge and the bearing seat plate to form a limiting groove with a top width smaller than a bottom width.

4. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 3, characterized in that: The mating components include: The chimeric end block is provided with a plurality of pieces, each of which has a trapezoidal cross section, adapted to the shape of the limiting slot, and is embedded in the limiting slot and arranged in sequence along the length direction of the limiting slot.

5. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 4, characterized in that: The shielding cover component comprises: The shield panel is provided with a plurality of pieces, each of which is located outside the side edge of the protection and is engaged with the top of the embedded end block.

6. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 2, characterized in that: The load bearing joint member comprises: The bearing adhesive layer is filled between the bearing seat plate and the impeller, and the bearing seat plate and the impeller are bonded and adhered by the bearing adhesive layer.

7. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 4, characterized in that: The matching lining components include: The lining adhesive layer is filled between the embedded end block and the bearing seat plate, and the embedded end block and the bearing seat plate are bonded and adhered by the lining adhesive layer.

8. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 3, characterized in that: The guard side edge and the bearing seat plate are integrally formed by metal plates, and the connecting portion between the bearing seat plate and the guard side edge is fixed to the outer wall of the impeller by welding.

9. The wear-resistant component for a high-temperature centrifugal fan impeller according to claim 5, characterized in that: The shield panel and the engaging end block are integrally formed of ceramic.

10. A wear-resistant component for a high-temperature centrifugal fan impeller according to claim 6 or 7, characterized in that: The bearing adhesive layer and the lining adhesive layer are made of high temperature resistant inorganic adhesive.

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