Roller shaft system mechanism for biomass pelletization

Abstract

The utility model belongs to the related mechanical equipment technical field of biomass granulation belongs to one kind of roller axle shafting mechanism for biomass granulation. Including the roller axle A and roller axle B of radial arrangement, the roller axle A includes the mould roll, wherein the mould roll both ends are provided with drive end flange and driven end flan respectively, and the drive end flange front end is connected with the drive assembly through the drive adapter flange and realizes the drive, the inside of mould roll is cavity structure, the mould roll both ends are provided with drive end bearing and driven end bearing respectively, and the outer periphery of mould roll is alternately arranged with the projection and the recess with the unit of circle, the projection and the recess on the mould roll on the roller axle B, the roller axle A are set up alternately to the opposite direction, the drive end bearing, driven end bearing of roller axle B are provided with adjusting assembly, and the other structure of roller axle B is same with the roller axle A, the distance between roller axle B, the roller axle A is adjusted through adjusting assembly. Can realize the adjustment between double roller axle, and through the structure and position setting of roller axle, can satisfy the demand of a variety of granulation size production. The scope of application is wider.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical equipment related to biomass pelleting, and relates to a roller shaft system mechanism for biomass pelleting. Background Technology

[0002] In the current biomass pelleting industry, a double-roller structure is used for production. However, this structure cannot effectively adjust the roller spacing, leading to roller wear and subsequent unusability and requiring replacement or repair, significantly impacting operating costs. Furthermore, the industry has many limitations on pellet size; the double rollers typically only produce pellets around 8 mm in diameter, failing to accommodate various raw materials. Traditional pellet mill die rollers and die skins have lifespans of 300 tons and 800 tons respectively, resulting in relatively short service lives and an inability to meet diverse pelleting needs. The current pelleting process is complex and costly, involving crushing, screening, drying, coarse and fine grinding, and pelleting. These numerous steps and high costs limit industry development. The pelleting industry also has strict requirements for material moisture content, generally requiring it to be around 15% before entering the pellet mill, further narrowing its applicability and necessitating additional pre-processing of materials. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a roller shaft system mechanism for biomass pelleting, which enables adjustment between two roller shafts and, through the structure and position of the roller shafts, can meet the needs of producing various pellet sizes. It has a wider range of applications.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution: A roller shaft system for biomass pelleting includes radially arranged roller A and roller B. Roller A includes a mold roller, with a drive end flange and a driven end flange at both ends. The front end of the drive end flange is connected to a drive assembly via a drive adapter flange to achieve drive. The mold roller has a hollow internal structure. A drive end bearing and a driven end bearing are also provided at both ends of the mold roller. The outer circumference of the mold roller is alternately arranged with protrusions and grooves in circles. The protrusions and grooves on the mold rollers of roller B and roller A are arranged alternately and oppositely. Adjustment components are provided at both the drive end bearing and the driven end bearing of roller B. The other structures of roller B are the same as those of roller A. The distance between roller B and roller A is adjusted by the adjustment components.

[0005] Each ring of protrusions consists of an array of several bosses, and each ring of grooves consists of an array of several concave holes. The concave holes are through holes, with the bottom being through holes and the top being chamfered.

[0006] A boss is a concave structure with an arc-shaped concave surface at the bottom.

[0007] The adjustment assembly includes a sliding bearing housing, an adjusting screw assembly, and wedge blocks. Guide limiting grooves are provided on the upper and lower surfaces of the sliding bearing housing. A wedge block is provided at each of the four corners of the sliding bearing housing. The wedge blocks are in contact with and fit against the sliding bearing housing. One end of the wide surface of the wedge block is connected to the adjustment frame through the adjusting screw assembly. The adjustment frame is a rectangular frame and is located on the outer periphery of the sliding bearing housing.

[0008] The adjusting screw assembly passes through the adjusting frame and connects to the wedge block.

[0009] The sliding bearing housing is located within the adjusting frame.

[0010] The adjusting frame and the sliding bearing housing are slidably connected via guide limiting grooves and guide bars, with the guide bars positioned on the upper and lower sides of the adjusting frame.

[0011] The adjustment frame of this invention can be set at the installation position of the roller.

[0012] The sliding bearing housing includes sliding bearing housing A and sliding bearing housing B. Sliding bearing housing A and sliding bearing housing B are connected together by bolts to form an integral sliding bearing housing.

[0013] The adjusting screw assembly includes adjusting screw A and adjusting screw B. Adjusting screw A is threadedly connected to the adjusting frame and then contacts the connecting hole A inside the wedge block. Adjusting screw B is threadedly connected to the adjusting frame and then contacts the threaded hole inside the wedge block. The depth of the connecting hole A inside the wedge block is less than the depth of the threaded hole.

[0014] Roller A and roller B move synchronously or asynchronously. They are arranged crosswise in the horizontal direction but do not contact each other.

[0015] A sealing plate is installed between the drive-end flange and the drive-end bearing, and a labyrinth-type sealing ring is also installed between the sealing plate and the drive-end bearing to achieve a double-layer seal. The sealing plate and sealing ring are not limited to specific models; their intended function is sufficient.

[0016] A sealing plate is installed between the driven flange and the driven bearing, and a labyrinth-type sealing ring is also installed between the sealing plate and the driven bearing to achieve a double seal. The sealing plate and sealing ring are not limited to specific models; their intended function is sufficient.

[0017] The driven end of the bearing is connected to the bearing cap.

[0018] The advantages of this utility model compared with the prior art are: This invention provides a roller shaft system mechanism for biomass pelleting, which allows for adjustment between two roller shafts. Through the structure and position of the roller shafts, it can meet the needs of producing various pellet sizes, thus broadening its applicability. The double-roller extrusion structure and its inherent structural design achieve efficient material feeding. The roller spacing can be arbitrarily changed, and when rollers wear out, they can continue to be used by adjusting the spacing, greatly extending the service life of the pressure rollers. The double-roller structure ensures effective pelleting even with moisture content between 10-25%, allowing for direct pelleting of silage raw materials. The pellet diameter range covers 3-30 mm. This invention's mechanism can directly pelletize raw materials without any pretreatment, effectively reducing various cumbersome processes and saving significant pelleting costs. It also increases the service life of the die rollers, reduces the need for replacing vulnerable parts, improves operational efficiency, and lowers operating costs.

[0019] This invention improves the feeding and pelleting efficiency of loose materials such as bamboo, wheat, rice, oats, and reeds. For common woody materials, corn stalks, cotton, and sesame, the pelleting degree is more than 1.5 times higher than traditional pelletizers. It has a wide moisture tolerance, effectively pelletizing materials with a moisture content between 10% and 22%. Silage materials can be directly pelletized for use as silage feed, preserving nutrients. The die roller has a service life of over 3000 tons, and can reach over 5000 tons under favorable operating conditions. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a top view of a roller shaft system mechanism for biomass pelleting according to the present invention.

[0021] Figure 2 This is a front view of a roller shaft system mechanism for biomass pelleting according to the present invention.

[0022] Figure 3 This is a perspective view of roller A of this utility model.

[0023] Figure 4 This is a perspective view of roller B of this utility model.

[0024] Figure 5 This is a simplified schematic diagram showing the state when the gap between the protrusion of the fixed mold roller and the outer circle of the sliding mold roller is 0.1mm. The mold roller on roller A is the fixed mold roller, and the mold roller on roller B is the sliding mold roller.

[0025] Figure 6 This is a simplified schematic diagram showing the state when the gap between the protrusion of the fixed mold roller and the outer circle of the sliding mold roller is 5mm. The mold roller on roller A is the fixed mold roller, and the mold roller on roller B is the sliding mold roller.

[0026] Figure 7 This is a simplified schematic diagram showing the state of the fixed mold roller of this utility model when its protrusion is inserted 2mm into the concave hole of the sliding mold roller for synchronous movement. The mold roller on roller A is the fixed mold roller, and the mold roller on roller B is the sliding mold roller.

[0027] In the diagram: 1. Roller A, 2. Roller B, 3. Driven end flange, 4. Driven end flange, 5. Driven end bearing, 6. Sealing plate, 7. Bearing cap, 8. Driven adapter flange, 9. Driven end bearing, 10. Adjusting screw assembly, 11. Wedge block, 12. Sliding bearing seat A, 13. Sliding bearing seat B, 14. Boss, 15. Guide limiting groove. Detailed Implementation

[0028] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially.

[0029] Example 1 A roller shaft system for biomass pelleting includes radially arranged rollers A1 and B2. Roller A1 includes a mold roller, with a drive flange 4 and a driven flange 3 at both ends. The front end of the drive flange 4 is connected to a drive assembly via a drive adapter flange 8 to achieve drive. The mold roller has a hollow internal structure. A drive bearing 5 and a driven bearing 9 are also provided at both ends of the mold roller. The outer circumference of the mold roller is alternately arranged with protrusions and grooves in circles. The protrusions and grooves on the mold rollers of rollers B2 and A1 are arranged alternately and oppositely. Adjustment components are provided at both the drive bearing 5 and the driven bearing 9 of roller B2. The other structures of roller B2 are the same as those of roller A1. The distance between rollers B2 and A1 is adjusted by the adjustment components.

[0030] Each ring of protrusions consists of an array of several bosses 14, and each ring of grooves consists of an array of several concave holes. The concave holes are through holes, with the bottom being through holes and the top being chamfered.

[0031] The boss 14 is a concave structure with an arc-shaped concave surface at the bottom.

[0032] The adjustment assembly includes a sliding bearing housing, an adjustment screw assembly 10, and wedge blocks 11. Guide limiting grooves 15 are provided on the upper and lower surfaces of the sliding bearing housing. A wedge block 11 is provided at each of the four corners of the sliding bearing housing. The wedge blocks 11 are in contact with and fit against the sliding bearing housing. One end of the wide surface of the wedge block 11 is connected to the adjustment frame through the adjustment screw assembly 10. The adjustment frame is a rectangular frame and is located on the outer periphery of the sliding bearing housing.

[0033] The adjusting screw assembly 10 passes through the adjusting frame and connects to the wedge block 11.

[0034] The sliding bearing housing is located within the adjusting frame.

[0035] The adjusting frame and the sliding bearing seat are slidably connected via guide limiting groove 15 and guide bars, which are located on the upper and lower sides of the adjusting frame.

[0036] The adjustment frame of this utility model can be set at the installation position of roller B2.

[0037] The sliding bearing housing includes sliding bearing housing A12 and sliding bearing housing B13. Sliding bearing housing A12 and sliding bearing housing B13 are connected together by bolts to form an integral sliding bearing housing.

[0038] The adjusting screw assembly 10 includes adjusting screw A and adjusting screw B. Adjusting screw A is threadedly connected to the adjusting frame and then contacts the connecting hole A in the wedge block 11. Adjusting screw B is threadedly connected to the adjusting frame and then threadedly connected to the threaded hole in the wedge block 11. The depth of the connecting hole A in the wedge block 11 is less than the depth of the threaded hole.

[0039] Rollers A1 and B3 can move synchronously or asynchronously. They are arranged crosswise in the horizontal direction but do not contact each other.

[0040] A sealing plate 6 is installed between the drive end flange 4 and the drive end bearing 5. A labyrinth-type sealing ring is also provided between the sealing plate 6 and the drive end bearing 5 to achieve double sealing. The sealing plate 6 and the sealing ring are not limited to specific models; they only need to achieve their working functions.

[0041] A sealing plate 6 is installed between the driven flange 3 and the driven bearing 9. A labyrinth-type sealing ring is also provided between the sealing plate 6 and the driven bearing 9 to achieve a double-layer seal. The sealing plate 6 and the sealing ring are not limited to specific models; they only need to achieve their working functions.

[0042] The driven end bearing 9 is connected to the bearing cap 7 at its end.

[0043] In practical operation: The biomass pelletizing roller shaft system mechanism of this utility model is installed on an existing pelletizer. Roller A1 is mounted on the pelletizer via an existing bearing fixing seat, and roller B2 is mounted on the pelletizer via a sliding bearing seat and an adjusting frame. The two rollers (roller A1 and roller B2) are driven by connecting to a drive motor via a drive adapter flange 8. The distance between the two rollers (roller A1 and roller B2) is adjusted by adjusting the distance using adjusting screws 10 and wedge blocks 11 in the adjusting assembly. The staggered state between the two rollers at different distances meets the working conditions of different applications. Figures 5-7When two rollers (roller A1 and roller B2) are arranged crosswise, there are three preferred configurations. The first is that the protruding end of the boss 14 on one roller is directly opposite the recessed hole on the other roller. The second is that the arc-shaped concave surface at the bottom of the boss 14 on one roller is directly opposite the recessed hole on the other roller. The third is that the boss 14 on one roller is inserted 2mm deep into the recessed hole on the other roller, but there is a gap between the boss 14 and the groove. Material enters the triangular area between the two rollers from the hopper above the rollers. The rotation of the two rollers drives the material to be cut through the axially arranged grooves and protrusions on the surface of the die rollers. Radially, the outer surface of the boss on the outer circle of one roller is pressed against the arc-shaped concave surface at the bottom of the boss on the outer circle of the other roller, extruding the shredded material into granules through the die holes. Here, the corresponding load data can be obtained through torque output. The servo system effectively adjusts the roller speed to control the material feed rate, thereby balancing the entire pelleting system and preventing material blockage. When the material type changes, the servo mechanism can adjust and control the corresponding speed output. For special materials, differential rotation of the two rollers can be adopted to improve the pelleting effect. When the die rollers wear down and their cutting or extrusion capabilities decrease, the radial adjustment of the sliding bearing seats can change the distance between the two die rollers to achieve a good cutting and extrusion effect. This greatly improves the service life of the die rollers and reduces equipment maintenance costs. The drive end bearing uses double-row tapered roller bearings, or single-row tapered roller bearings arranged face-to-face or back-to-back. Axial force is limited by locking nuts. The driven end bearing uses double-row radial roller bearings. Depending on the machine size and actual working conditions, this bearing may be changed to a single row. When the material enters the concave hole, it is squeezed out by the subsequent material, and the pellets are cut and discharged by the discharge mechanism.

[0044] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model.

Claims

1. A roller shaft system mechanism for biomass pelleting, characterized in that, The roller shaft includes a radially arranged roller shaft A (1) and roller shaft B (2). Roller shaft A (1) includes a mold roller, wherein a drive end flange (4) and a driven end flange (3) are respectively provided at both ends of the mold roller. The front end of the drive end flange (4) is connected to the drive assembly through the drive adapter flange (8) to realize the drive. The mold roller has a hollow structure inside. A drive end bearing (5) and a driven end bearing (9) are also provided at both ends of the mold roller. The outer circumference of the mold roller is alternately arranged with protrusions and grooves in circles. The protrusions and grooves on the mold rollers on roller shaft B (2) and roller shaft A (1) are arranged alternately and oppositely. An adjustment assembly is provided at the drive end bearing (5) and the driven end bearing (9) of roller shaft B (2). The other structures of roller shaft B (2) are the same as those of roller shaft A (1). The distance between roller shaft B (2) and roller shaft A (1) is adjusted by the adjustment assembly.

2. The roller shaft system mechanism for biomass pelletizing as described in claim 1, characterized in that, Each ring of protrusions is composed of an array of several protrusions (14), and each ring of grooves is composed of an array of several concave holes. The concave holes are through holes, with the bottom being through holes and the top being chamfered.

3. The roller shaft system mechanism for biomass pelletizing as described in claim 1, characterized in that, The adjustment assembly includes a sliding bearing seat, an adjustment screw assembly (10), and a wedge block (11). The upper and lower surfaces of the sliding bearing seat are provided with guide limiting grooves (15). A wedge block (11) is provided at each of the four corners of the sliding bearing seat. The wedge block (11) is in contact with the sliding bearing seat. One end of the wide surface of the wedge block (11) is connected to the adjustment frame through the adjustment screw assembly (10). The adjustment frame is a rectangular frame and is located on the outer periphery of the sliding bearing seat.

4. The roller shaft system mechanism for biomass pelletizing as described in claim 1, characterized in that, A sealing plate (6) is provided between the drive end flange (4) and the drive end bearing (5), and a labyrinth seal ring is also provided between the sealing plate (6) and the drive end bearing (5) to achieve double sealing; a sealing plate (6) is provided between the driven end flange (3) and the driven end bearing (9), and a labyrinth seal ring is also provided between the sealing plate (6) and the driven end bearing (9) to achieve double sealing.

5. The roller shaft system mechanism for biomass pelletizing as described in claim 2, characterized in that, The boss (14) is a concave structure with an arc-shaped concave surface at the bottom.

6. The roller shaft system mechanism for biomass pelletizing as described in claim 3, characterized in that, The adjusting screw assembly (10) passes through the adjusting frame and is connected to the wedge block (11).

7. The roller shaft system mechanism for biomass pelletizing as described in claim 3, characterized in that, The sliding bearing housing is located within the adjusting frame.

8. The roller shaft system mechanism for biomass pelletizing as described in claim 3, characterized in that, The adjusting frame and the sliding bearing seat are slidably connected through the guide limiting groove (15) and the guide bar, which is set on the upper and lower sides of the adjusting frame; the adjusting frame and the sliding bearing seat are slidably connected through the guide limiting groove (15) and the guide bar.

9. The roller shaft system mechanism for biomass pelletizing as described in claim 3, characterized in that, The sliding bearing housing includes sliding bearing housing A (12) and sliding bearing housing B (13). Sliding bearing housing A (12) and sliding bearing housing B (13) are connected together by bolts to form an integral sliding bearing housing.

10. The roller shaft system mechanism for biomass pelletizing as described in claim 3, characterized in that, The adjusting screw assembly (10) includes adjusting screw A and adjusting screw B. Adjusting screw A is threadedly connected to the adjusting frame and then contacts the connecting hole A in the wedge block (11). Adjusting screw B is threadedly connected to the adjusting frame and then threadedly connected to the threaded hole in the wedge block (11). The depth of the connecting hole A in the wedge block (11) is less than the depth of the threaded hole.

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