Maintenance-free dynamic self-lubricating granulator

Abstract

The utility model discloses a maintenance-free dynamic self-lubricating granulator which comprises a base, a driving mechanism, a feeding mechanism, a pressing mechanism and a discharging mechanism, and the driving mechanism comprises a main motor, a speed reducer and a transmission shaft assembly; the pressing mechanism comprises a pressing chamber arranged at the upper end of the base, a mold assembly and a pressing roller assembly, and the mold assembly is connected with a servo motor; plastic oil is arranged in the transmission shaft assembly and the compression roller assembly. The maintenance-free dynamic self-lubricating granulator disclosed by the utility model can run in a high-load, dusty and high-temperature environment for a long time, and a lubricating film is autonomously formed in the running process of the granulator, so that the maintenance frequency is reduced, the friction loss is reduced, the wear resistance is enhanced, and even the granulator is maintenance-free.

Description

Technical Field

[0001] The utility model relates to the technical field of granulators, in particular to a maintenance-free dynamic self-lubricating granulator. Background Art

[0002] Wood powder pellet machine is of great significance in the field of biomass energy conversion. It can process wood powder and other biomass materials into granular fuel, which is widely used in heating, power generation and other fields. However, if the traditional wood powder pellet machine is not effectively lubricated, it will cause serious heating, large friction loss and other problems, and it is easy to have equipment failure, requiring frequent maintenance and care, which affects production efficiency.

[0003] In the prior art, the lubrication of pellet machines mainly relies on the regular addition of lubricating oil or grease or the use of a lubrication system, which not only increases maintenance costs but also may cause environmental pollution. Utility Model Content

[0004] The utility model solves the problems of the prior art and provides a maintenance-free dynamic self-lubricating granulator which reduces maintenance frequency, reduces friction loss and enhances wear resistance.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a maintenance-free dynamic self-lubricating granulator, comprising: a base, a driving mechanism, a feeding mechanism, a pressing mechanism and a discharging mechanism, the driving mechanism comprising a main motor, a reducer and a transmission shaft assembly, the pressing mechanism comprising a pressing chamber, a mold assembly and a pressure roller assembly arranged at the upper end of the base, the mold assembly is transmission-connected to a servo motor, and the transmission shaft assembly and the pressure roller assembly are both provided with plastic oil.

[0006] As a further improvement, the plastic oil uses polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK polymer as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like substance, which is heated and solidified to form a microporous oil-containing lubricating medium, and the micropores inside the plastic oil adsorb saturated lubricating oil, which is stored in the polymer micropores through surface tension.

[0007] A further improvement is that the transmission shaft assembly includes a rotating shaft, a bearing, a bearing seat and a transmission component. The transmission shaft is connected to the motor through a reducer. A first bearing chamber is arranged between the transmission shaft and the bearing seat. The plastic oil is arranged in the first bearing chamber for lubrication. The plastic oil is filled in the gap of the rolling bearing and rotates together with the retaining frame and the rolling body.

[0008] A further improvement is that the pressure roller assembly includes a mounting bearing seat fixedly arranged outside the pressing chamber, a support shaft and a pressure roller rotatably arranged on the support shaft, the pressure roller and the mold assembly are arranged correspondingly, a second bearing chamber is arranged between the support shaft and the pressure roller, and the plastic oil is arranged in the second bearing chamber for lubrication.

[0009] As a further improvement, the transmission shaft adopts a sliding bearing structure, and the transmission shaft is provided with a plurality of holes or grooves, and the plastic oil is injected into the holes or grooves.

[0010] As a further improvement, the support shaft adopts a sliding bearing structure, and a plurality of holes or grooves are provided on the support shaft, and the plastic oil is injected into the holes or grooves.

[0011] As a further improvement, a wear-resistant coating is sprayed on the rotating shaft, and the wear-resistant coating is any one or more of DLC, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.

[0012] As a further improvement, a wear-resistant coating is sprayed on the support shaft, and the wear-resistant coating is any one or more of DLC, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Superior performance: It exhibits stable lubrication performance in various extreme environments such as high temperature, low temperature, strong radiation, etc., significantly improving the operating stability and durability of the equipment, reducing the failure rate caused by lubrication problems, thereby improving production efficiency and reducing maintenance costs;

[0015] 2. Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution;

[0016] 3. Low friction and wear: During the working process of the pellet machine, the plastic oil can form a lubricating film on its own, reducing the friction and wear between moving parts;

[0017] 4. Dust resistance: The lubricating oil or grease used in traditional pellet machines has a rapid decline in lubrication performance in dusty environments, causing bearings to heat up or even get stuck, increasing operation and maintenance costs and downtime. The plastic oil used in the present invention can overcome these problems, provide long-lasting and stable lubrication protection, reduce equipment failure rate, extend maintenance cycles, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a side view of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the plastic oil case of the transmission shaft assembly of the utility model;

[0021] Figure 4 It is a partial schematic diagram of the pressure roller assembly of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the plastic oil for the pressure roller assembly of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the plastic oil for installing the bearing seat of the pressure roller of the utility model;

[0024] Figure 7 This is a schematic diagram of the plastic oil structure of the sliding bearing structure of the utility model.

[0025] In the figure, 1. base; 2. driving mechanism; 21. motor; 22. reducer; 23. transmission shaft assembly; 231. transmission shaft; 232. bearing; 233. bearing seat; 234. transmission component; 235. first bearing chamber; 3. feeding mechanism; 4. pressing mechanism; 41. pressing chamber; 42. pressing roller assembly; 421. mounting bearing seat; 422. supporting shaft; 423. pressing roller; 43. mold assembly; 44. second bearing chamber; 5. discharging mechanism; 51. discharge port; 52. discharge pipe; 53. cooling fan; 54. discharge port; 6. plastic body oil; 8. servo motor. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Below is a combination of the embodiments and the attached Figures 1 to 7 , the technical solution of the utility model is further elaborated.

[0029] Example 1

[0030] A maintenance-free dynamic self-lubricating granulator comprises: a base 1, a driving mechanism 2, a feeding mechanism 3, a pressing mechanism 4 and a discharging mechanism 5, wherein the driving mechanism comprises a main motor 21, a reducer 22 and a transmission shaft assembly 23, the pressing mechanism 4 comprises a pressing chamber 41, a pressure roller assembly 42 and a mold assembly 43 arranged at the upper end of the base, the mold assembly 43 is connected to a servo motor 8 for transmission, and plastic oil 6 is provided in the transmission shaft assembly 23 and the pressure roller assembly 42.

[0031] Plastic oil 6 is a high molecular polymer material with special lubricating properties. Saturated lubricating oil is adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.

[0032] The transmission shaft assembly 23 includes a rotating shaft 231, a bearing 232, a bearing seat 233 and a transmission component 234. The transmission shaft 231 is connected to the motor 21 through a reducer 22. A first bearing chamber 235 is arranged between the transmission shaft 231 and the bearing seat 233. The plastic oil 6 is arranged in the first bearing chamber 235 for lubrication. The plastic oil 6 is filled in the gap of the rolling bearing 232 and rotates together with the retaining frame and the rolling body.

[0033] As a further preferred embodiment, the transmission shaft adopts a sliding bearing structure 7, and a plurality of holes or grooves are provided on the transmission shaft 231, and the plastic oil 6 is injected into the holes or grooves.

[0034] As a further preferred embodiment, the transmission shaft 231 adopts a wear-resistant coating structure, and the wear-resistant coating is directly sprayed on the shaft, including but not limited to DLC coating, diamond-like carbon coating, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, etc., as well as PTFE, PEEK, PI, MoS2 coating, etc. without limitation.

[0035] The pressure roller assembly 42 includes a mounting bearing seat 421 fixedly arranged outside the pressing chamber 41, a support shaft 422 and a pressure roller 423 rotatably arranged on the support shaft. There are 2 to 6 pressure rollers distributed around the circumference without limitation. The pressure roller 423 and the mold assembly 43 are arranged correspondingly. A second bearing chamber 44 is arranged between the pressure roller and the support shaft 422, and the plastic oil 6 is arranged in the second bearing chamber for lubrication.

[0036] As a further preferred embodiment, similarly, the pressure roller assembly adopts the structure of a sliding bearing 7, and a plurality of holes or grooves are provided on the support shaft 422, and the plastic oil 6 is injected into the holes or grooves.

[0037] As a further preferred embodiment, the support shaft 422 adopts a wear-resistant coating structure, and the wear-resistant coating is directly sprayed on the shaft, including but not limited to DLC coating, diamond-like carbon coating, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, etc., as well as PTFE, PEEK, PI, MoS2 coating, etc. without limitation.

[0038] like Figures 1 to 7 As shown, the utility model has a simple structure and a reasonable design. During use, the powder is transported to the pressing mechanism 4 by the auger, and the mold assembly 43 is driven to rotate by the servo drive mechanism 8. The relative movement between the mold assembly 43 and the pressure roller assembly 42 generates temperature between the mold assembly 43 and the pressure roller assembly 42. The powder material is gelatinized at high temperature and discharged from the mold assembly 43 under the extrusion of the pressure roller assembly 42. The produced particles enter the discharge pipe 52 through the discharge port 51, and the high-temperature particles after molding are cooled and qualitatively treated by the cooling fan 53, and finally discharged through the discharge port 54, thereby improving the yield rate.

[0039] The roller bearing part of the pellet mill is usually accompanied by high pressure and shear stress, and the heat energy accumulation is large, which makes the lubricant more demanding. Plastic Oil 6 has good extreme pressure resistance and oxidation resistance, can quickly penetrate into the tiny gaps of the bearing, continuously provide lubrication, and resist corrosion caused by moisture, dust and other pollutants, greatly reducing the risk of roller bearing damage.

[0040] As a further preferred embodiment, the pressure roller teeth also adopt a wear-resistant coating structure, and the wear-resistant coating is sprayed on the teeth, including but not limited to DLC coating, diamond-like carbon coating, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, etc., as well as PTFE, PEEK, PI, MoS2 coating, etc.

[0041] As a further preferred embodiment, the feed mechanism includes a feed roller or a spiral auger with a wear-resistant coating, and a feed conveyor belt or a conveying system with plastic oil 6 as a lubricating medium for moving parts. The moving parts of the discharging structure also use plastic oil 6 as a lubricating medium.

[0042] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A maintenance-free dynamic self-lubricating pellet machine, characterized in that: include: A base, a driving mechanism, a feeding mechanism, a pressing mechanism and a discharging mechanism, wherein the driving mechanism includes a main motor, a reducer and a transmission shaft assembly, the pressing mechanism includes a pressing chamber, a mold assembly and a pressure roller assembly arranged at the upper end of the base, the mold assembly is transmission-connected to a servo motor, and the transmission shaft assembly and the pressure roller assembly are both provided with plastic oil.

2. A maintenance-free dynamic self-lubricating granulator according to claim 1, characterized in that: The plastic oil is made of polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK polymer as a base material, and is mixed with lubricating oil and additives to form a viscous fluid-like substance, which is heated and solidified to form a microporous oil-containing lubricating medium. The micropores inside the medium absorb saturated lubricating oil and are stored in the polymer micropores through surface tension.

3. A maintenance-free dynamic self-lubricating granulator according to claim 2, characterized in that: The transmission shaft assembly includes a rotating shaft, a bearing, a bearing seat and a transmission component. The transmission shaft is connected to the motor through a reducer. A first bearing chamber is arranged between the transmission shaft and the bearing seat. The plastic oil is arranged in the first bearing chamber for lubrication. The plastic oil is filled in the gap of the rolling bearing and rotates together with the retaining frame and the rolling body.

4. A maintenance-free dynamic self-lubricating granulator according to claim 2, characterized in that: The pressure roller assembly includes a mounting bearing seat fixedly arranged outside the pressing chamber, a support shaft and a pressure roller rotatably arranged on the support shaft. The pressure roller and the mold assembly are arranged correspondingly. A second bearing chamber is arranged between the support shaft and the pressure roller. The plastic oil is arranged in the second bearing chamber for lubrication.

5. The maintenance-free dynamic self-lubricating granulator according to claim 3, characterized in that: The transmission shaft adopts a sliding bearing structure, and the transmission shaft is provided with a plurality of holes or grooves, and the plastic oil is injected into the holes or grooves.

6. A maintenance-free dynamic self-lubricating granulator according to claim 4, characterized in that: The support shaft adopts a sliding bearing structure, and a plurality of holes or grooves are arranged on the support shaft, and the plastic oil is injected into the holes or grooves.

7. The maintenance-free dynamic self-lubricating granulator according to claim 3, characterized in that: The rotating shaft is sprayed with a wear-resistant coating, and the wear-resistant coating is any one or more of DLC, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.

8. The maintenance-free dynamic self-lubricating granulator according to claim 4, characterized in that: The support shaft is sprayed with a wear-resistant coating, and the wear-resistant coating is any one or more of DLC, metal-ceramic composite coating, cemented carbide coating, oxide ceramic coating, titanium nitride coating, PTFE, PEEK, PI, and MoS2 coating.

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