A pressing wheel sleeve and a granulator using the pressing wheel sleeve

Abstract

The invention discloses a pressing wheel sleeve, which is applied to a granulator and is used for preparing plant extract powder into granular raw materials, wherein the pressing wheel sleeve is sleeved on the rotating shaft of the dry granulator and is engaged with the pressing wheel, so as to ensure the stable operation of the pressing wheel and prevent the powdered extract from escaping into the bearing and affecting the normal operation of the granulator; the pressing wheel sleeve comprises a main body and a fixed support part based on the extension of the main body, wherein the main body is sleeved and connected with the rotating shaft, the fixed support part is in contact with the power rotating shaft and the pressing wheel at the same time, the fixed support part comprises an outer support part and an inner support part, so as to fix the pressing wheel and ensure that the pressing wheel does not deform during the working process; a through gas channel is provided in the main body and the fixed support part, and the gas channel introduces inert gas to form a gas barrier to isolate the powder particles.

Description

Technical Field

[0001] The invention belongs to the field of mechanical granulators and is a device for preparing powdery raw materials into granules, and specifically relates to a pressing wheel sleeve and a dry granulator using the pressing wheel sleeve. Background Art

[0002] In the field of plant extraction, most of the extracted products are obtained after vacuum or spray drying. The finished extracts are often in powder form. Powdered finished products have problems such as large storage and transportation volume, and easy moisture absorption and deterioration. Therefore, it is a common demand in the industry to make the powdered extracts into granules. To prepare granular extracts, a granulator is required.

[0003] The working principle of a granulator is usually to use a pair of pressing wheels to squeeze the powdered raw materials into flakes, and then filter the flakes through crushing gears and screens to obtain granular raw materials of required specifications. Since the raw materials of granulators are mostly powdered raw materials, the particles of powdered raw materials are small and the movement is irregular. In the long-term operation of traditional granulators, the bearings linked to the pressing rollers in the powder processing stage are damaged quickly, mainly because the powdered raw materials will escape into the bearings, thus affecting the life of the bearings; in addition, the accumulation of powdered raw materials around the pressing wheels will also affect the running precision between the rotating shaft and the pressing wheels, resulting in uneven thickness of the flake raw materials discharged from the pressing wheels, which makes the parameter adjustment of the granulator subject to great uncertainty.

[0004] Based on this, it is necessary to improve some structures of the granulator to overcome the influence of powdered raw materials on the rotating area and improve the life of the granulator and the consistency of the output products. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a pressure wheel sleeve, which is applied to a granulator, especially a dry granulator. The pressure wheel sleeve can continuously isolate the powdered raw materials at the pressure wheel of the granulator from escaping to the bearing and adversely affecting the bearing, thereby increasing the service life of the bearing.

[0006] Furthermore, the concept of the present invention is that the provided pressing wheel sleeve also includes a main body and a fixed support portion extending toward the periphery based on the main body, wherein the main body is sleeved on the rotating shaft, and the main body is arranged between the bearing member and the pressing wheel to isolate the powdered raw material from direct contact with the bearing, thereby increasing the service life of the bearing.

[0007] Furthermore, another concept of the present invention is that the provided pressing wheel sleeve also includes a fixed support portion for supporting the pressing wheel to ensure the stability of the shape of the pressing wheel, thereby improving the forming rate of the sheet material pressed out by the pressing wheel and the consistency of the size specifications of the sheet material.

[0008] Furthermore, another concept of the present invention is that the main body and / or the fixed support portion of the provided pressure roller sleeve are provided with an air flow channel, and the air flow channel introduces gas, and the gas can form a shielding layer to continuously prevent dust from escaping to the bearing.

[0009] Furthermore, another concept of the present invention is that the fixed support portion of the provided pressing wheel sleeve includes an outer support member and an inner support member, and the outer support member and the inner support member are simultaneously in low contact with the pressing wheel, and the inner support member is sleeved on the rotating shaft. This design can improve the stability of the pressing wheel and ensure the forming rate of the powdered raw material into the sheet raw material and the size consistency of the sheet raw material.

[0010] Based on the above concept, the present invention specifically provides a pressing wheel sleeve, which is applied to a granulator, and is installed between a bearing member and a pressing wheel, wherein the pressing wheel sleeve comprises a body and a fixed support portion based on the extension of the body;

[0011] The main body is cylindrical, including a cylindrical inner surface and a cylindrical outer surface. The main body can be sleeved on the rotating shaft, and the cylindrical inner surface is in contact with the rotating shaft.

[0012] One end of the body includes an inner step structure, which is a circular inner step structure. The inner step structure cooperates with the protrusion of the rotating shaft to fix the pressure wheel sleeve, prevent the pressure wheel sleeve from sliding on the bearing along the bearing direction, and provide stable support.

[0013] Furthermore, the main body is provided with at least one air inlet channel for introducing gas into the interior of the main body.

[0014] The gas is an inert gas, preferably nitrogen.

[0015] It should be noted that the main body is a cylindrical structure, and the air inlet passage is used to introduce the inert gas into the inner cylinder surface of the main body.

[0016] Furthermore, at least one first airflow channel is arranged in the cylindrical surface of the main body, and the airflow channel is arranged in a ring around the inner surface of the cylinder.

[0017] Furthermore, the first airflow channel may be spiral, or an independent annular shape, or a plurality of annular channels may be connected.

[0018] Among them, the air inlet channel introduces gas into the first air flow channel, and the introduced gas circulates in the air flow channel to form an air flow shield, which can take away the powdery matter that escapes to the pressure wheel sleeve in time, thereby preventing the dust from moving toward the bearing and avoiding damage to the bearing.

[0019] In some embodiments, the fixed support portion includes an outer support member and an inner support member;

[0020] Wherein, the fixed support member presents a basic conical structure.

[0021] The end surfaces of the outer support member and the inner support member are substantially on the same plane.

[0022] Furthermore, a first annular groove is provided between the outer support member and the inner support member;

[0023] The groove and the pressing wheel are embedded with each other.

[0024] The outer support member is embedded in the pressing wheel.

[0025] The outer support member is provided with a second annular groove on its outer periphery, and the groove platforms on both sides of the annular groove abut against the pressing wheel and support the pressing wheel.

[0026] The outer support member mainly plays the role of supporting the pressure wheel to prevent the pressure wheel from deformation; in addition, a second annular groove is provided on the outer support member, and the second annular groove can collect powder particles during the movement of the pressure wheel to ensure that the pressure roller will not get stuck or heat up due to dust entering between the outer support member and the pressure wheel during the support process.

[0027] In some embodiments, a first annular protrusion is further provided on the surface opposite to the second groove of the outer support member;

[0028] The first annular protrusion can be arranged in cooperation with the pressure wheel to improve the combination stability between the outer support member and the pressure wheel.

[0029] Furthermore, the inner support member includes a second air flow channel, and the second air flow channel is arranged on a side of the inner support member that contacts the rotating shaft.

[0030] The surface of the inner support member opposite to the second air flow channel includes a second annular protrusion member for cooperating with the pressure wheel.

[0031] Furthermore, a third air flow channel is provided in the first annular groove, and the third air flow channel is connected with the first air flow channel, and the inert gas in the first air flow channel is introduced into the third air flow channel.

[0032] The first annular groove is provided with an inwardly sunken step groove, and the step groove forms a fourth air flow channel; the air flow introduced into the third air flow channel moves in the fourth air flow channel to form a shielding layer.

[0033] Furthermore, the present invention also provides a granulator, wherein the granulator uses the pressing wheel sleeve provided by the present invention;

[0034] The granulator comprises a feeding part, an extrusion molding part, a granulation part and a collecting part;

[0035] Among them, the feeding part includes the feeding port, feeding pressure mechanism, feeding screw and barrel seat;

[0036] The feeding part is used to transport the powdered raw materials to the extrusion forming part, and extrude the powdered raw materials into sheet (or strip) raw materials.

[0037] The extrusion molding part comprises an extrusion cylinder and a pressure wheel assembly.

[0038] The clearance of the pressing wheel assembly is adjusted by squeezing the oil cylinder to adjust the specifications of the sheet material.

[0039] The pressure wheel assembly includes a pressure wheel, a pressure wheel sleeve, a rotating shaft, an air groove sealing ring, a bearing seat, a bearing, an upper pressure plate, a bearing cover, and a transmission gear.

[0040] The pressing wheel sleeve is installed between the bearing and the pressing wheel, the pressing wheel sleeve body is sleeved on the bearing, and the fixed support member of the pressing wheel sleeve is in contact with the pressing wheel.

[0041] Furthermore, the air groove sealing ring is clamped between the bearing seat and the pressure wheel sleeve to ensure the fixation of the pressure wheel sleeve.

[0042] Furthermore, a gas inlet is provided on the bearing seat to introduce the inert gas into between the gas groove sealing ring and the pressure wheel sleeve.

[0043] Furthermore, the air inlet passage of the pressure wheel sleeve is connected to the air passage of the air groove sealing ring to introduce the external gas into the pressure wheel sleeve.

[0044] Furthermore, the bearing seat is also provided with a lubricating oil inlet, which is connected to the bearing.

[0045] A liquid sealing groove is arranged between the bearing, the bearing seat and the pressure wheel sleeve.

[0046] A bearing cover is provided between the other end of the bearing and the rotating shaft;

[0047] The bearing seat is also provided with an upper pressure plate;

[0048] The rotating shaft is provided with a transmission gear, and the transmission gear is connected with another driven rotating shaft through the transmission gear to ensure that the running speeds of the two pressing wheels are consistent.

[0049] Furthermore, the granulation part includes a granulation frame, a crushing mechanism, a granulation mechanism, and a screen.

[0050] Compared with the prior art, the pressure wheel sleeve provided by the present invention is arranged between the pressure wheel and the bearing, which can effectively prevent powdery particles from escaping to the bearing and causing bearing failure; at the same time, an air path is arranged on the pressure wheel sleeve to shield the passage between dust and the bearing, and due to the continuous ventilation of the air path, the isolation effect is also relatively continuous. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 , Schematic diagram of granulator;

[0053] Figure 2 , pressure wheel assembly;

[0054] Figure 3 , overall schematic diagram of the pressure wheel sleeve;

[0055] Figure 4 , broken view of the pressure wheel sleeve;

[0056] Figure 5 , Schematic diagram of airflow direction of the pressure wheel sleeve;

[0057] Among them, 1. feed port; 2. feeding and pressing mechanism; 3. feeding screw; 4. barrel seat; 5. pressing wheel assembly; 6. material strip; 7. granulation frame; 8. crushing mechanism; 9. granulation mechanism; 10. screen; 11. second upper pressing plate; 12. second bearing seat; 13. second liquid seal; 14. second bearing cover; 15. second bearing; 16. pressing wheel sleeve; 17. pressing wheel; 18. gas groove sealing ring; 19. first upper pressing plate; 20. first bearing seat; 21. first liquid seal; 22. first bearing cover; 23. first bearing; 24. transmission gear; 2 5. Rotating shaft; 26. First air inlet; 27. First lubricating oil inlet; 28. Second air inlet; 29. ​​Second lubricating oil inlet; 30. Main body; 31. Fixed support; 32. Inner support; 33. Outer support; 34. Air inlet channel; 35. First air flow channel; 36. Second air flow channel; 37. Third air flow channel; 38. First annular groove; 39. Second annular groove; 40. Inner step structure; 41. Connecting groove; 42. Step groove; 43. Second annular protrusion; 44. First annular protrusion; 45. Air guide port. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] See also Figure 1 A schematic diagram of a granulator provided by the present invention, wherein the granulator is divided into a feeding part, an extrusion molding part, a granulation part and a collection part;

[0060] The feeding part includes a feeding port 1, a feeding pressure mechanism 2, a feeding screw 3, and a barrel seat 4.

[0061] The feed port 1 is generally arranged at the upper end of the barrel, the pressure feeding mechanism 2 is arranged on the barrel, the pressure feeding mechanism 2 includes a motor and an impeller arranged on the pressure feeding mechanism 2, and the feeding screw 3 is also arranged on the pressure feeding mechanism 2. The pressure feeding mechanism 2 drives the impeller and the feeding screw 3 to work through the motor.

[0062] The feeding part is used to convey the powdered raw materials to the extrusion forming part, and extrude the powdered raw materials into sheet raw materials.

[0063] Specifically, the powder is conveyed to the barrel of the feeding part at the feed port 1 by manual or negative pressure conveying. The pressure feeding mechanism 2 is operated to drive the impeller and the feeding screw 3 to work. The impeller is used to stir and disperse the powder and gather the powder to the feeding screw 3. The feeding screw 3 is a conical screw design. The powder is extruded into the basic feeding part and enters the extrusion molding part.

[0064] The extrusion molding part includes an extrusion cylinder and a pressure wheel assembly 5.

[0065] The clearance of the pressing wheel assembly 5 is adjusted by squeezing the oil cylinder to adjust the specification of the sheet material.

[0066] The material strips 6 (or sheets) formed by extrusion will enter the granulation part.

[0067] The granulation part includes a granulation frame 7, a crushing mechanism 8, a granulation mechanism 9, and a screen 10.

[0068] Among them, the crushing mechanism 8, the granulating mechanism 9 and the screen 10 are installed on the granulating frame 7. When working, the material strips 6 (or sheets) pressed by the extrusion molding part enter the crushing mechanism 8, and the material strips 6 (or sheets) are crushed into granules. The granular material strips 6 (or sheets) enter the granulating mechanism 9, and the granulating mechanism 9 gathers or crushes the granular material strips 6 (or sheets) into a specified size. The granular material of composite specifications passes through the screen 10 to obtain granular materials of required size.

[0069] In another embodiment, see Figure 2 , showing the pressing wheel assembly 5 of the extrusion molding part;

[0070] The pressure wheel assembly 5 includes a pressure wheel 17 , a pressure wheel sleeve 16 , a rotating shaft 25 , an air groove sealing ring 18 , a bearing seat, a bearing, an upper pressure plate, a bearing cover, and a transmission gear 24 .

[0071] It should be noted that the pressure wheel assembly 5 of the extrusion molding part basically presents a symmetrical structure, that is, a pressure wheel sleeve 16, a bearing seat, a rotating shaft 25, an air groove sealing ring and a bearing cover are respectively arranged on the left and right sides of the pressure wheel.

[0072] See below for details Figure 2 For illustration, the pressure wheel sleeve 16 , the pressure wheel 17 and the first bearing 23 are all sleeved and mounted on the rotating shaft 25 , and the pressure wheel sleeve 16 is installed between the first bearing 23 and the pressure wheel 17 .

[0073] The first bearing 23 is installed and fixed in the first bearing seat 20 , and the pressure wheel sleeve 16 is partially fixed on the first bearing seat 20 and abuts against the first bearing 23 .

[0074] A first liquid seal 21 is provided between the first bearing 23 and the pressure wheel sleeve 16 and the first bearing seat 20 to seal the gap between the pressure wheel sleeve 16 and the bearing.

[0075] A first air groove sealing ring 18 is also arranged between the pressure wheel sleeve 16 and the first bearing seat 20. The first air groove sealing ring 18 realizes the sealing between the first bearing seat 20 and the pressure wheel sleeve 16, and the gas can flow in the gap formed between the first air groove sealing ring 18 and the pressure wheel sleeve 16 and the first bearing seat 20.

[0076] Furthermore, a first air inlet 26 is also provided on the first bearing seat 20, and the first air inlet 26 passes through the first bearing seat 20 and is connected with the gap formed between the first air groove sealing ring 18 and the pressure wheel sleeve 16 and the first bearing seat 20, and transports the gas into the gap.

[0077] Furthermore, the first upper pressure plate 19 is disposed on the first bearing seat 20 to protect the bearing seat.

[0078] Furthermore, the first bearing seat 20 is also provided with a first lubricating oil inlet 27, and the first lubricating oil inlet 27 is connected to the bearing mounting position to provide lubricating oil to the bearing mounting position.

[0079] A first liquid seal 21 is further provided between the first bearing seat 20 , the first bearing 23 and the pressure wheel sleeve 16 .

[0080] Furthermore, a first bearing cover 22 is installed on the other side of the first bearing seat 20 to protect the normal operation of the bearing.

[0081] Furthermore, a transmission gear 24 is also provided on the bearing, and the transmission gear 24 is transmission-connected with a transmission gear 24 on the rotating shaft of another pressing wheel of the granulator.

[0082] In addition, the arrangement of the pressure wheel sleeve 16, the second upper pressure plate 11, the second bearing 15, the second liquid seal 13, the second bearing seat 12, the second air groove sealing ring, the second bearing cover 14, the second liquid seal 13, the second air inlet 28, and the second lubricating oil inlet 29 are symmetrical to the above-mentioned scheme and are not elaborated here.

[0083] During operation, an air flow of 0.2-0.5 MPa is usually introduced into the air inlet, and a gas seal is formed between the pressure wheel sleeve 16 and the rotating shaft 25 by the air flow, preventing dust from entering the bearing working space along the rotating shaft 25 and affecting the life of the bearing.

[0084] In another embodiment, see Figure 2-Figure 5 , specifically showing the pressing wheel sleeve 16 provided by the invention, wherein the pressing wheel sleeve 16 is applied to a granulator;

[0085] The pressure wheel sleeve 16 includes a main body 30 and a fixed support portion 31 extending from one end of the main body 30;

[0086] The body 30 is cylindrical, including a cylindrical inner surface and a cylindrical outer surface. The body 30 can be sleeved on the rotating shaft 25 , and the cylindrical inner surface contacts the rotating shaft 25 .

[0087] The other end of the body 30 includes an inner step structure 40, which is a circular inner step structure 40. The inner step structure 40 cooperates with the protrusion of the rotating shaft 25 to fix the pressure wheel sleeve 16 and provide stable support.

[0088] Furthermore, the inner step structure 40 can extend into the bearing seat, so that the bearing seat, the pressure wheel sleeve 16 and the bearing are relatively stable.

[0089] The body 30 is also provided with at least one air inlet channel 34 for introducing an inert gas into the interior of the body 30;

[0090] Specifically, the air inlet channel 34 is arranged in the gap formed between the bearing seat and the air groove sealing ring 18 and the pressure wheel sleeve 16, and can introduce the gas introduced from the external air inlet into the air flow channel between the pressure wheel sleeve 16 and the rotating shaft 25 through the air inlet channel 34.

[0091] There is at least one air inlet passage 34;

[0092] Furthermore, the body 30 is a cylindrical structure, and the air inlet passage 34 is arranged between the outer surface and the inner surface of the cylindrical structure.

[0093] Furthermore, at least one first airflow channel 35 is disposed on the inner surface of the cylinder of the body 30 , and the first airflow channel 35 is arranged in a ring around the inner surface of the cylinder.

[0094] It should be noted that the first airflow channel 35 may be spiral, or an independent annular shape, or a plurality of annular channels connected to each other.

[0095] See also Figure 4 The airflow channels provided by the present invention are two annular airflow channels. The first airflow channel 35 is two groove rings, and the groove rings are connected to each other. The connection can be achieved by setting a transverse connecting groove 41.

[0096] The air inlet channel 34 introduces gas into the first air flow channel 35. The introduced gas circulates in the air flow channel. Since the pressure wheel 17 is in contact with the rotating shaft 25, the circulating gas can prevent dust from moving toward the bearing, play a role of gas shielding, and avoid damage to the bearing.

[0097] In some embodiments, see Figure 3-Figure 4 , the fixed support portion 31 includes an outer support member 33 and an inner support member 32;

[0098] Wherein, the fixed support member basically presents a basic conical structure.

[0099] The end faces of the outer support member 33 and the inner support member 32 are basically on the same plane; the outer support member 33 is used to fix the pressure wheel away from the outer periphery of the rotating shaft 25, and the inner support member 32 is used to fix the pressure wheel 17 close to the center of the rotating shaft 25. The support of the inner support member 32 and the outer support member 33 ensures the stability of the pressure wheel 17, thereby improving the service life of the pressure wheel 17.

[0100] See also Figure 2-Figure 5 , a first annular groove 38 is provided between the outer support member 33 and the inner support member 32; the first annular groove 38 is engaged with the pressing wheel 17, so that the inner support member 32 and the outer support member 33 can play a role in supporting the pressing wheel 17;

[0101] Furthermore, the outer support member 33 is embedded in the pressing wheel 17 .

[0102] A second annular groove 39 is disposed on the outer periphery of the outer support member 33 . The two side platforms of the second annular groove 39 abut against the pressing wheel 17 and support the pressing wheel 17 .

[0103] The outer support member 33 mainly supports the pressure wheel 17 to prevent the pressure wheel 17 from being deformed; in addition, a second annular groove 39 is provided on the outer support member 33; the second annular groove 39 is provided on the outer peripheral side of the outer support member 33, and the second annular groove 39 is abutted against the side adjacent to the circumferential surface of the pressure wheel 17. The second annular groove 39 can collect powder particles during the movement of the pressure wheel 17 to ensure that the pressure roller will not get stuck or heat up due to dust entering between the outer support member 33 and the pressure wheel 17 during the support process.

[0104] Furthermore, a first annular protrusion 44 is provided on the opposite surface of the second groove of the outer support member 33 . The first annular protrusion 44 can be provided in cooperation with the pressure wheel 17 to improve the combination stability of the outer support member 33 and the pressure wheel 17 .

[0105] Furthermore, the inner support member 32 may also include a second annular protrusion 43 for cooperating with the pressure wheel 17 .

[0106] It should be noted that the annular protrusion can be designed according to the size of the pressure wheel. Generally speaking, when the pressure wheel is large, the support and fixation of the protruding annular member is required. When the pressure wheel is small, the annular protrusion may not be required.

[0107] See also Figure 2 , Figure 4-Figure 5 A second air flow channel 36 is provided on the inner support member 32 , and the second air flow channel 36 is provided on a side of the second support member that contacts the rotating shaft 25 .

[0108] The second air flow channel 36 may be in a spiral shape, or in an independent annular shape, or in a plurality of annular shapes connected through the channels.

[0109] See also Figure 4 The second air flow channel 36 provided by the present invention is a circular air flow channel.

[0110] Furthermore, a third air flow channel 37 is provided in the first annular groove 38, and the third air flow channel is connected with the first air flow channel 35, and the inert gas in the first air flow channel 35 is introduced into the third air flow channel 37;

[0111] Furthermore, the third air flow channel 37 is connected to the first air flow channel 35 through the air guide port 45 .

[0112] More specifically, the pressure wheel sleeve 16 has an air guide port 45 , and the third air flow channel 37 is connected to the connecting groove 41 through the air guide port 45 , and is connected to the first air flow channel 35 .

[0113] It should be noted that the pressure wheel sleeve 16 can be provided with at least one air guide port 45; the number of air guide ports 45 will determine the overall mechanical properties of the pressure wheel sleeve 16. The pressure wheel sleeve 16 of the present invention is provided with one air guide port 45, such as Figure 4 shown.

[0114] like Figure 4 As shown, the third airflow channel is connected to the first airflow channel 35 via a connecting groove 41 ; further, the second airflow channel 36 is connected to the first airflow channel 35 and the third airflow channel 37 , specifically, via the connecting groove 41 .

[0115] It should be noted that the number of connecting grooves 41 here can be one or more, and the connecting groove 41 connecting the first airflow channels 35 and the connecting groove 41 connecting the first airflow channel 35 and the third airflow channel 37 can be the same groove or independent grooves.

[0116] The first annular groove 38 is provided with an inwardly recessed step groove 42, and the step groove 42 forms a fourth air flow channel; the air flow introduced into the third air flow channel 37 moves in the fourth air flow channel to form a shielding layer.

[0117] The third air flow channel 37 can transmit the externally delivered air flow, especially the inert gas air flow, to the side of the pressing wheel 17 through the pressing wheel sleeve 16;

[0118] Furthermore, the side of the pressing wheel 17 of the granulator of the present invention is generally provided with a through hole, so that the airflows on the two sides of the pressing wheel 17 are connected. Such a setting can reduce the temperature of the pressing wheel 17 when it is working continuously, and secondly can ensure the smoothness of the airflow.

[0119] In addition, the rotating shaft 25 of the present invention is provided with a through hole, and the through hole on the rotating shaft 25 is arranged at a position corresponding to the third air flow channel 37, which can guide the gas out of the pressure wheel assembly 5 and ensure the temperature of the rotating shaft 25.

[0120] See also Figure 5In the present invention, the airflow introduced from the bearing seat is first introduced into the air groove sealing ring 18 between the pressure wheel sleeve 16 and the bearing seat. The gas in the gap enters the first airflow channel 35 through the air inlet channel 34 and fills the first airflow channel 35. The first airflow channel 35 is two groove rings, and the groove rings are connected by a transverse connecting groove 41. Furthermore, the connecting groove 41 is also connected to the third airflow channel 37 and the second airflow channel 36, and can introduce the airflow into the third airflow channel 37 and the second airflow channel 36. The outer end of the third airflow channel 37 is provided with a recessed step groove 42 to form a fourth airflow channel. The fourth airflow channel is located on the side of the pressure wheel 17 and can introduce the gas into the gap on the pressure wheel 17.

[0121] In addition, the present invention also provides an operating method of a dry granulator, including checking that each component of the equipment is installed and fastened in place. Prepare the material. Install the mesh number of the granulation net according to the finished product particle size requirements and set the appropriate hydraulic pressure. Turn on the power supply, power on the equipment, start the compressor, inject gas, and the gas pressure is 0.2MPa. After the no-load operation is normal, add the material to the hopper, and adjust the hydraulic pressure and the speed of the extrusion motor and the feeding motor in time to make the three elements reach the best combination state. If it still cannot be pressed into a sheet after adjustment, increase the material humidity and spray adhesives such as edible alcohol.

[0122] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressing wheel sleeve, applied to a granulator, characterized in that: The pressure wheel sleeve (16) comprises a main body (30) and a fixed support portion (31) extending outwardly from one end of the main body (30); The body (30) is cylindrical, including a cylindrical inner surface and a cylindrical outer surface. When in use, the body (30) is sleeved on the rotating shaft, and the cylindrical inner surface is in contact with the rotating shaft. The other end of the body (30) comprises an inner step structure (40), wherein the inner step structure (40) cooperates with the protruding portion of the rotating shaft to fix the pressure wheel sleeve (16); At least one first air flow channel (35) is provided on the inner surface of the cylinder of the body (30); The body (30) is also provided with at least one air inlet channel (34) for introducing air into the first air flow channel (35) between the pressure wheel sleeve (16) and the rotating shaft; The fixed support portion (31) comprises an outer support member (33) and an inner support member (32); Wherein, the fixed support portion (31) presents a conical structure; The end faces of the outer support member (33) and the inner support member (32) are located on the same plane; during installation, the outer support member (33) is used to fix the pressure wheel away from the outer periphery of the rotating shaft, and the inner support member (32) is used to fix the pressure wheel close to the center of the rotating shaft; A first annular groove (38) is provided between the outer support member (33) and the inner support member (32); The first annular groove (38) is arranged in engagement with the pressing wheel, so that the inner support member (32) and the outer support member (33) can play a role in supporting the pressing wheel; The outer periphery of the outer support member (33) is provided with a second annular groove (39), and the groove platforms on both sides of the second annular groove (39) abut against the pressing wheel and are used to support the pressing wheel; A second air flow channel (36) is provided on the inner support member (32), and the second air flow channel (36) is provided on a side of the inner support member (32) that contacts the rotating shaft; A third air flow channel (37) is provided in the first annular groove (38), and the third air flow channel (37) is communicated with the first air flow channel (35); The second air flow channel (36) is connected to the first air flow channel (35) and the third air flow channel (37) via a connecting groove (41); The pressure wheel sleeve (16) has an air guide port (45), and the third air flow channel (37) is connected to the connecting groove (41) through the air guide port (45), and is connected to the first air flow channel (35).

2. The pressure wheel sleeve according to claim 1, characterized in that: An inwardly recessed step groove (42) is provided in the first annular groove (38), and the step groove (42) forms a fourth air flow channel; the air flow introduced into the third air flow channel (37) forms a shielding layer in the fourth air flow channel.

3. The pressure wheel sleeve according to claim 2, characterized in that: The first air flow channel (35) and / or the second air flow channel (36) are spiral or annular.

4. A granulator, characterized in that: Use the pressure wheel sleeve described in any one of claims 1 to 3.

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