Extrusion screw for fly ash granulator
By improving the extrusion screw structure of the fly ash granulator, and utilizing the intermediate shaft channel, stabilizing shaft, and metal-based composite rubber lining structure, the problem of vibration at the end of the extrusion screw was solved, improving equipment stability and particle quality, and enhancing the equipment's adaptability and wear resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 宁波龙育机械设备有限公司
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-05
AI Technical Summary
When the fly ash granulator compresses fine powder at the end of the extrusion screw, the load increases, which can easily cause vibration, affecting the stability of the equipment and the quality of the granules.
An extrusion spiral structure including a drive shaft, an intermediate shaft, a stabilizing shaft, and end caps was designed. The intermediate shaft reduces weight through its channel, the stabilizing shaft is fixed by bearings, and the inner liner structure and inner liner ring made of metal-based composite rubber material are combined to reduce vibration and impact, thereby improving equipment stability and particle quality.
It significantly reduces equipment vibration and noise, improves the operational stability and particle quality of fly ash granulators, enhances adaptability to changes in material load, and extends the service life of the equipment.
Smart Images
Figure CN224197090U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of granulation technology, and in particular to a fly ash granulator. Background Technology
[0002] A fly ash granulator is a device used to process fly ash into granular materials. Its core purpose is to improve the physical properties of fly ash through physical or chemical methods, facilitating subsequent resource utilization or safe disposal. One of the core components of a fly ash granulator is the extrusion screw, whose design directly affects granulation efficiency, particle uniformity, and equipment stability.
[0003] However, when the fly ash granulator compresses fine powder into granules, the end of the extrusion screw is subjected to increased load during the compression of the fine powder, which can easily cause vibration. This may have a negative impact on the stability of the fly ash granulator and the quality of the granules. Utility Model Content
[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.
[0005] In view of the problems existing in the prior art, the present invention is proposed.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution;
[0007] The fly ash granulator uses an extrusion screw, including a drive shaft that drives the extrusion screw.
[0008] It also includes an intermediate shaft connected to the drive shaft, and a spiral structure is provided on the outside of the intermediate shaft;
[0009] One end of the intermediate shaft that connects to the drive shaft is designated as the connecting end, and the other end is designated as the extending end. The axial distance of the spiral structure gradually decreases from the connecting end to the extending end.
[0010] The intermediate shaft is provided with a channel passing through it, and an end cap that closes the channel is provided on the intermediate shaft, with the end cap located at the extended end of the intermediate shaft.
[0011] It also includes a stabilizing shaft, which is disposed in the channel of the intermediate shaft, with one end of the stabilizing shaft connected to the drive shaft and the other end extending from the end cover;
[0012] The stabilizing shaft is provided with a bearing for mounting the stabilizing shaft on the portion extending outward from the end cover.
[0013] The above design, firstly, by setting a channel through the intermediate shaft, can significantly reduce the weight of the extrusion screw, thereby reducing the burden on the fly ash granulator supporting the extrusion screw and improving the operational stability of the fly ash granulator; secondly, by setting a stabilizing shaft, which is fixed to the discharge pressure plate of the fly ash granulator by bearings, and using an end cover to support the extended end of the intermediate shaft, and connecting the intermediate shaft and the stabilizing shaft to the drive shaft, the two ends of the intermediate shaft can be supported, improving the operational stability of the intermediate shaft, reducing vibration, ensuring the long-term operational stability of the fly ash granulator, and improving the quality of the granules.
[0014] Preferably, the end cap includes a metal outer ring structure and a metal-based composite rubber inner liner structure, with the inner liner structure embedded in the center of the outer ring structure. The outer ring structure is connected to the intermediate shaft, and the inner liner structure is positioned between the stabilizing shaft and the outer ring structure. The end cap with the metal-based composite rubber inner liner structure provides good support performance, elasticity, and shock absorption. It effectively absorbs vibration and impact, significantly reducing system noise and improving working environment comfort. It also offers better adaptability to uneven load variations in fly ash granulator material addition, maintaining stability within a certain range.
[0015] Preferably, the outer ring structure has an inner extension section extending into the channel and an outer cover section abutting against the outer end of the intermediate shaft; the inner extension section has a central through hole, the diameter of which is greater than twice the diameter of the stabilizing shaft; the outer cover section has an outward expansion groove, and the inner lining structure is embedded in the outward expansion groove. By providing the inner extension section, the stability of the end cover supporting the intermediate shaft is improved, and the inner lining structure embedded in the outward expansion groove prevents fly ash and particles from entering the channel, and also increases the elasticity and shock absorption effect of the inner lining structure.
[0016] Preferably, a rubber liner ring is provided in the channel of the intermediate shaft, and the liner ring is placed between the stabilizing shaft and the inner wall of the channel. The inner wall of the intermediate shaft is supported by the liner ring to reduce vibration caused by deformation or impact.
[0017] Preferably, at least three inner lining rings are arranged in the channel, and the spacing between the inner lining rings is smaller the closer they are to the extended end. The arrangement of at least three inner lining rings in the channel of the intermediate shaft reduces vibrations caused by impacts at various points on the intermediate shaft, thereby improving the stability of the intermediate shaft.
[0018] Preferably, the outer diameter of the intermediate shaft is one-half to two-thirds of the outer diameter of the spiral structure; the wall thickness of the intermediate shaft is 15-22 mm. This ensures the mechanical strength of the intermediate shaft.
[0019] Preferably, the surface of the spiral structure is provided with a raised structure, the raised structure extends along the rotation direction of the spiral structure, and the length of the extended raised structure is 2-3 cm.
[0020] Preferably, the height of the protrusion from the spiral structure is 0.4-0.8 mm, and the radius of the rounded corner at the top of the protrusion is 0.2-0.35 mm. The hard particles are guided between the protrusions, ensuring the rolling motion of the dust, reducing the sliding of dust particles on the surface of the spiral structure, and improving the friction resistance of the spiral structure.
[0021] Preferably, a sealing ring is provided on the side of the bearing facing the intermediate shaft. The sealing ring can prevent compressed fine powder and particles from entering the bearing and damaging it. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0023] Figure 1 This is a cross-sectional structural schematic diagram of the extrusion screw for the fly ash granulator of this utility model;
[0024] Figure 2 This is a schematic diagram of the external structure of the extrusion screw for the fly ash granulator of this utility model;
[0025] Figure 3 This is a schematic diagram of the external structure of the extrusion screw of this utility model installed in a fly ash granulator. Detailed Implementation
[0026] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0027] 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. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0028] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.
[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments. Example 1
[0030] refer to Figures 1-3 The fly ash granulator uses an extrusion screw, including a drive shaft 1 that drives the extrusion screw.
[0031] It also includes an intermediate shaft 2 connected to the drive shaft 1, and a spiral structure 3 is provided on the outside of the intermediate shaft 2;
[0032] The intermediate shaft 2 is connected to the drive shaft 1 at one end as the connecting end and the other end as the extending end. The axial distance of the spiral structure 3 gradually decreases from the connecting end to the extending end.
[0033] The intermediate shaft 2 is provided with a channel 21 that passes through the intermediate shaft 2, and an end cap 6 that closes the channel 21 is provided on the intermediate shaft 2. The end cap 6 is provided at the extended end of the intermediate shaft 2.
[0034] It also includes a stabilizing shaft 4, which is disposed in the channel 21 of the intermediate shaft 2. One end of the stabilizing shaft 4 is connected to the drive shaft 1, and the other end extends out from the end cover 6.
[0035] The stabilizing shaft 4 is provided with a bearing 5 on the portion extending outward from the end cover 6.
[0036] The above design, firstly, by setting a channel 21 through the intermediate shaft 2, can significantly reduce the weight of the extrusion screw, thereby reducing the burden on the fly ash granulator supporting the extrusion screw and improving the stability of the fly ash granulator operation; secondly, by setting a stabilizing shaft 4, which is fixed to the discharge pressure plate of the fly ash granulator by bearings 5, and using end caps 6 to support the extended end of the intermediate shaft 2, and connecting the intermediate shaft 2 and the stabilizing shaft 4 to the drive shaft 1, can support both ends of the intermediate shaft 2, improve the stability of the intermediate shaft 2 operation, reduce vibration, ensure the stability of the fly ash granulator during long-term operation, and improve the quality of the granules.
[0037] The end cap 6 includes a metal outer ring structure 61 and a metal-based composite rubber inner liner structure 62, with the inner liner structure 62 embedded in the center of the outer ring structure 61. The outer ring structure 61 is connected to the intermediate shaft 2, and the inner liner structure 62 is positioned between the stabilizing shaft 4 and the outer ring structure 61. The end cap 6, with its metal-based composite rubber inner liner structure 62, provides good support performance, elasticity, and shock absorption. It effectively absorbs vibration and impact, significantly reducing system noise and improving working comfort. It also exhibits better adaptability to uneven load variations in fly ash granulator material addition, maintaining stability within a certain range.
[0038] The outer ring structure 61 is provided with an inner extension section extending into the channel 21 and an outer cover section abutting against the outer end of the intermediate shaft 2; the inner extension section is provided with a central through hole, the diameter of which is greater than twice the diameter of the stabilizing shaft 4; the outer cover section is provided with an outward expansion groove, and the inner lining structure 62 is embedded in the outward expansion groove. By providing the inner extension section, the stability of the end cover 6 supporting the intermediate shaft 2 is improved, and the inner lining structure 62 embedded in the outward expansion groove prevents fly ash and particles from entering the channel 21, and also increases the elasticity and shock absorption effect of the inner lining structure 62.
[0039] In use, the fly ash granulator can significantly reduce the weight of the extrusion screw by setting a channel 21 through the intermediate shaft 2, thereby reducing the burden on the fly ash granulator to support the extrusion screw. The stabilizing shaft 4 is fixed to the discharge pressure plate of the fly ash granulator by bearings 5, and the extended end of the intermediate shaft 2 is supported by the end cover 6. Moreover, the intermediate shaft 2 and the stabilizing shaft 4 are connected to the drive shaft 1, which can support both ends of the intermediate shaft 2. The end cover 6 is provided with a metal-based composite rubber liner structure 62, which has good support performance and good elasticity and shock absorption effect. The extended section extends into the channel 21, which improves the stability of the end cover 6 in supporting the intermediate shaft 2. The liner structure 62 is embedded in the outer expansion groove to prevent fly ash and particles from entering the channel 21, improve the stability of the intermediate shaft 2 operation, reduce the generation of vibration, ensure the stability of the fly ash granulator during long-term operation, and improve the quality of the particles. Example 2
[0040] refer to Figure 1 and Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.
[0041] A rubber liner ring 7 is provided in the channel 21 of the intermediate shaft 2, and the liner ring 7 is placed between the stabilizing shaft 4 and the inner wall of the channel 21. The inner wall of the intermediate shaft 2 is supported by the liner ring to reduce vibration caused by deformation or impact.
[0042] At least three inner lining rings 7 are arranged in the channel 21, and the spacing between the inner lining rings 7 is smaller the closer they are to the extended end. The arrangement of at least three inner lining rings 7 in the channel 21 of the intermediate shaft 2 reduces the vibration caused by impacts at various points on the intermediate shaft 2 and improves the stability of the intermediate shaft 2.
[0043] The outer diameter of the intermediate shaft 2 is one-half to two-thirds of the outer diameter of the spiral structure 3; the wall thickness of the intermediate shaft 2 is 15-22 mm. This ensures the mechanical strength of the intermediate shaft 2.
[0044] The surface of the spiral structure 3 is provided with a protruding structure, which extends along the rotation direction of the spiral structure 3, and the length of the protruding structure is 2-3 cm.
[0045] The protrusions of the raised structure from the spiral structure 3 are 0.4-0.8 mm in height, and the radius of the rounded corners at the top of the raised structure is 0.2-0.35 mm. The hard particles are guided between the raised structures, ensuring the rolling movement of the dust, reducing the sliding of dust particles on the surface of the spiral structure 3, and improving the friction resistance of the spiral structure 3.
[0046] A sealing ring is provided on the side of the bearing 5 facing the intermediate shaft 2. The sealing ring can prevent compressed fine powder and particles from entering the bearing 5 and damaging the bearing 5.
[0047] During use, at least three inner liner rings 7 are arranged in the channel 21 of the intermediate shaft 2 to reduce the vibration caused by impacts at various points of the intermediate shaft 2 and improve the stability of the intermediate shaft 2. Hard particles are guided between the raised structures to ensure the rolling movement of dust and reduce the sliding of dust particles on the surface of the spiral structure 3. While ensuring conveying efficiency, the wear resistance of the spiral structure 3 is significantly improved. It is especially suitable for high wear conditions containing hard impurities. The sealing ring can prevent compressed fine powder and particles from entering the bearing 5 and damaging the bearing 5. It is suitable for long-term operation.
[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An extrusion screw for a fly ash granulator, comprising a drive shaft for driving the extrusion screw, characterized in that: It also includes an intermediate shaft connected to the drive shaft, and a spiral structure is provided on the outside of the intermediate shaft; One end of the intermediate shaft that connects to the drive shaft is designated as the connecting end, and the other end is designated as the extending end. The axial distance of the spiral structure gradually decreases from the connecting end to the extending end. The intermediate shaft is provided with a channel passing through it, and an end cap that closes the channel is provided on the intermediate shaft, with the end cap located at the extended end of the intermediate shaft. It also includes a stabilizing shaft, which is disposed in the channel of the intermediate shaft, with one end of the stabilizing shaft connected to the drive shaft and the other end extending from the end cover; The stabilizing shaft is provided with a bearing for mounting the stabilizing shaft on the portion extending outward from the end cover.
2. The extrusion screw for the fly ash granulator according to claim 1, characterized in that: The end cap includes an outer ring structure made of metal and an inner liner structure made of metal-based composite rubber, wherein the inner liner structure is embedded in the center of the outer ring structure. The outer ring structure is connected to the intermediate shaft, and the inner liner structure is disposed between the stabilizing shaft and the outer ring structure.
3. The extrusion screw for a fly ash granulator according to claim 2, characterized in that: The outer ring structure is provided with an inner extension section that extends into the channel and an outer cover section that abuts against the outer end of the intermediate shaft; The inner extension section is provided with a central through hole, the diameter of which is greater than twice the diameter of the stabilizing shaft; The outer cover section is provided with an outward expansion groove, and the inner lining structure is embedded in the outward expansion groove.
4. The extrusion screw for a fly ash granulator according to claim 1, characterized in that: A rubber liner ring is provided in the channel of the intermediate shaft, and the liner ring is placed between the stabilizing shaft and the inner wall of the channel.
5. The extrusion screw for a fly ash granulator according to claim 4, characterized in that: At least three inner lining rings are arranged in the channel, and the closer the inner lining rings are to the extended end, the smaller the spacing between the inner lining rings.
6. The extrusion screw for a fly ash granulator according to claim 1, characterized in that: The outer diameter of the intermediate shaft is one-half to two-thirds of the outer diameter of the spiral structure; The wall thickness of the intermediate shaft is 15-22 mm.
7. The extrusion screw for a fly ash granulator according to claim 1, characterized in that: The surface of the spiral structure is provided with a raised structure, which extends along the rotation direction of the spiral structure and the length of the extended raised structure is 2-3 cm.
8. The extrusion screw for a fly ash granulator according to claim 7, characterized in that: The height of the protrusion from the spiral structure is 0.4-0.8mm, and the radius of the rounded corner at the top of the protrusion is 0.2-0.35mm.
9. The extrusion screw for a fly ash granulator according to claim 1, characterized in that: A sealing ring is provided on the side of the bearing facing the central shaft.