Pressure stabilizing device of screw extruder

Abstract

The invention relates to a screw extruder pressure stabilizing device, and relates to the technical field of extruders, the screw extruder pressure stabilizing device comprises a material pressure feeding assembly, a rotating shaft and a bearing seat, the rotating shaft is connected with the material pressure feeding assembly, and the material pressure feeding assembly is arranged on a material channel at the upstream of a filter screen so as to extrude materials to pass through the filter screen; the part, located on the upstream of the material pressure feeding assembly, of the material channel is a front-section channel, and the part, located on the downstream of the material pressure feeding assembly, of the material channel is a rear-section channel. The rotating shaft is in clearance fit with a shaft hole in the bearing seat; the bearing seat is provided with oil inlets, the oil inlets are connected with the lubricating oil supply system through oil conveying pipes, the oil inlets are all communicated with the shaft hole, the direction of the oil inlets is opposite to the direction of extrusion force F of materials acting on the rotating shaft, and the lubricating oil supply system can adjust the oil outlet flow of the oil inlets. The extrusion machine has the effects that the offset of the center of the rotating shaft deviating from the center of the bearing seat is reduced, material leakage is reduced, and the working safety of the extrusion machine is improved.

Description

Technical Field

[0001] The present application relates to the technical field of extruders, and in particular to a voltage stabilizing device for a screw extruder. Background Art

[0002] Screw extruder is a continuous processing equipment widely used in chemical industry, plastic processing, food industry and other fields. It is mainly used for mixing, plasticizing, extrusion and molding. From the time the material leaves the screw to the time it is extruded from the outlet, it needs to be filtered through a filter. As the filter continues to filter, the flow through the filter gradually decreases, causing the back pressure on both sides of the filter to increase. At the same time, the material will accumulate in the screw extruder. The screw continuously squeezes the material, causing the material to overheat and cause thermal degradation. Usually, a pressure stabilizer is set upstream of the filter to squeeze the material accumulated in front of the filter through the filter.

[0003] The existing pressure stabilizing device is to set a rotating pressure plate in the material channel in front of the filter screen. The rotating pressure plate is rotatably connected to the machine body through a rotating shaft. The rotating shaft and the machine body are connected through a bearing seat, so that a sliding bearing structure is formed between the rotating shaft and the bearing seat. When there is material accumulation on the upstream side of the filter screen, the rotating shaft drives the rotating pressure plate to rotate, and the rotating pressure plate squeezes the material through the filter screen to reduce the accumulation of material in the extruder cavity. In the prior art, the rotating pressure plate is squeezed by the material, and the squeezing force is transmitted to the rotating shaft, causing the center of the rotating shaft to deviate from the center of the bearing seat, so that the gap between one side of the rotating shaft and the bearing seat increases, resulting in leakage of material, which has a great safety hazard. Summary of the invention

[0004] In order to improve the problem that when the rotating shaft is subjected to the extrusion force of the material, the gap between one side and the bearing seat increases, resulting in material leakage and posing a greater safety hazard, the present application provides a screw extruder pressure stabilizing device.

[0005] The present application provides a screw extruder pressure stabilizing device that adopts the following technical solution: A screw extruder pressure stabilizing device comprises a material pressure-feeding assembly, a rotating shaft and a bearing seat, wherein the rotating shaft is connected to the material pressure-feeding assembly to drive the material pressure-feeding assembly to work, the material pressure-feeding assembly is arranged in a material channel upstream of a filter screen to squeeze the material through the filter screen, the portion of the material channel located upstream of the material pressure-feeding assembly is a front section channel, and the portion of the material channel located downstream of the material pressure-feeding assembly is a rear section channel; The rotating shaft is clearance-matched with the shaft hole on the bearing seat; An oil inlet is provided on the bearing seat, and the oil inlet is connected to the lubricating oil supply system through an oil pipe. The oil inlet is connected to the shaft hole. The direction of the oil inlet is opposite to the direction of the extrusion force F exerted by the material on the rotating shaft. The lubricating oil supply system can adjust the oil flow rate of the oil inlet.

[0006] By adopting the above technical solution, when the extruder is extruding the material, the rotating shaft drives the material pressure delivery component to rotate, and the material is transported from the front section channel to the rear section channel. The material in the rear section channel is filtered by the filter and discharged from the discharge port to complete the filtration of the material. When the filter is blocked, the pressure of the material in the rear section channel is greater than the pressure of the material in the front section channel, and the material exerts an extrusion force F on the rotating shaft toward the front section channel. At this time, the lubricating oil supply system increases the oil inlet pressure of the lubricating oil at the oil inlet, and the direction of the oil inlet is opposite to the extrusion force F exerted by the material on the rotating shaft. This design can make full use of the lubricating oil to offset part of the reaction force, reduce the offset of the center of the rotating shaft from the center of the bearing seat, and then reduce the change in the gap between the rotating shaft and the bearing seat, reduce the leakage of the material, and improve the safety of the extruder.

[0007] Preferably, the extruder is provided with two groups of pressure sensors connected to the material channel, and the two groups of pressure sensors are respectively arranged on both sides of the material pressure delivery component.

[0008] By adopting the above technical solution, two sets of pressure sensors can monitor the pressure changes in the material channel on both sides of the material pressure delivery component. This arrangement can obtain the pressure distribution data of the material during the conveying process in real time, thereby more accurately reflecting the flow state of the material. Specifically, the pressure sensor located upstream of the material pressure delivery component can be used to detect the pressure accumulation of the material in the front channel, while the pressure sensor located downstream is used to monitor the pressure release of the material in the rear channel. The combination of the two can effectively determine whether the material passes through the filter smoothly, and promptly detect possible blockages or other abnormal problems, thereby improving the working stability and production efficiency of the entire screw extruder.

[0009] Preferably, the bearing seat is provided with an oil outlet connected to the shaft hole, and the oil outlet is opposite to the oil inlet.

[0010] By adopting the above technical solution, an oil outlet connected to the shaft hole is provided on the bearing seat, and the oil outlet is opposite to the oil inlet, which can effectively form a smooth flow path for the lubricating oil circuit. This design allows the lubricating oil entering the shaft hole to be discharged smoothly after completing the lubrication function, avoiding the accumulation of lubricating oil inside the bearing seat, thereby reducing the heat accumulation and component wear caused by the retention of lubricating oil, and improving the stability of the rotating shaft and the service life of the bearing seat.

[0011] Preferably, the oil outlet is connected to the lubricating oil supply system via an oil return pipe so that the lubricating oil circulates, and a filtering system is connected in series to the oil return pipe so as to filter impurities in the lubricating oil.

[0012] By adopting the above technical solution, the oil return pipe between the oil outlet and the lubricating oil supply system is used to ensure that the lubricating oil can be recycled and reduce resource waste. The filter system connected in series on the oil return pipe can remove impurities in the lubricating oil, prevent impurities from causing wear on the rotating shaft and bearing seat, and improve the reliability of equipment operation.

[0013] Preferably, a cooling system is provided on the oil return pipe.

[0014] By adopting the above technical solution, the cooling system is set on the oil return pipe, which can effectively reduce the temperature of the returning lubricating oil. This not only helps to maintain the stability of the entire lubrication system, but also prolongs the service life of the lubricating oil, while reducing equipment wear caused by high temperature, thereby improving the overall operating efficiency and reliability of the screw extruder.

[0015] Preferably, the material pressing and feeding assembly includes a conveying disc and a pressing piece, the extruder is provided with a pressing chamber connected in series on the material channel, the pressing chamber is adapted to the conveying disc, the conveying disc is coaxially fixedly connected with the rotating shaft, a storage trough is provided on the conveying disc, the conveying disc can drive the storage trough to communicate with the front section channel and the rear section channel respectively, the pressing piece can press the material in the storage trough into the rear section channel to convey the material in the front section channel to the rear section channel.

[0016] By adopting the above technical scheme, when the material is transported from the front channel to the rear channel, the rotating shaft drives the conveying plate to rotate, and when the conveying plate drives the storage trough to be connected with the front channel, the material in the front channel is pressed into the storage trough, and the conveying plate drives the storage trough and the material to rotate relative to the rear channel, and then the pressing piece is inserted into the storage trough to press the material in the storage trough out, and the material enters the rear channel, thereby realizing the material transportation from the front channel to the rear channel and improving the isolation between the front channel and the rear channel.

[0017] Preferably, the pressing member includes a pressing block, which is located in the rear section channel and is slidably connected to the extruder. The conveying disc and the pressing block are connected by a connecting piece so as to drive the pressing block to be inserted into the storage tank.

[0018] By adopting the above technical solution, when the material storage trough is opposite to the rear section channel, the conveying plate drives the pressing block to be inserted into the material storage trough through the connecting piece, presses the material from the material storage trough into the rear section channel, and completes the transfer of the material between the material storage trough and the rear section channel.

[0019] Preferably, the minimum width of the material storage trough along the circumferential direction of the conveying disc is greater than the maximum width of the pressing block in this direction, so that the pressing block can slide into and out of the material storage trough.

[0020] By adopting the above technical solution, it is possible to ensure that the pressing block can slide smoothly into and out of the storage tank during the rotation of the conveying disc. Specifically, since the minimum width of the storage tank along the circumference of the conveying disc is designed to be larger than the maximum width of the pressing block in this direction, this size difference effectively avoids interference between the two, thereby achieving smooth cooperation between the pressing block and the storage tank. This design not only improves the stability of the material conveying process, but also reduces the risk of failure caused by mechanical jamming during equipment operation.

[0021] Preferably, the connecting member comprises a connecting rod, a guide ring groove is provided on the end surface of the conveying disc, one end of the connecting rod is fixedly connected to the pressing block, and the other end is inserted into the guide ring groove; The guide ring groove includes a first guide section, a second guide section, a first transition section and a second transition section. The first guide section and the second guide section are connected by the first transition section and the second transition section. The first guide section can guide the pressing block to slide on the side wall of the conveying disk, the first transition section can guide the pressing block to be inserted into the material storage trough, the second guide section can guide the pressing block to slide in the material storage trough, and the second transition section can guide the pressing block to slide out of the material storage trough.

[0022] By adopting the above technical solution, the cooperation between the connecting rod and the guide ring groove realizes the position switching of the pressing block in different working stages. Specifically, the first guide section enables the pressing block to slide stably on the side wall of the conveying disc to ensure that the material does not enter the storage tank prematurely; the first transition section accurately guides the pressing block to insert into the storage tank to avoid jamming; the second guide section ensures that the pressing block moves smoothly in the storage tank to complete the material compaction process; the second transition section effectively guides the pressing block to exit the storage tank to prepare for the next material filling. This design significantly improves the efficiency and stability of material transmission, while reducing the failure rate of equipment operation.

[0023] Preferably, a roller is provided at one end of the connecting rod inserted into the guide ring groove, and the roller is rotatably connected to the connecting rod and is adapted to the guide ring groove.

[0024] By adopting the above technical solution, the roller is rotationally connected to the connecting rod and rolls in the guide ring groove, thereby significantly reducing the friction resistance between the connecting rod and the guide ring groove, improving the transmission efficiency and extending the service life of the components.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the filter is clogged, the pressure of the material in the rear channel is greater than the pressure of the material in the front channel, and the material exerts an extrusion force F on the rotating shaft toward the front channel. At this time, the lubricating oil supply system increases the oil inlet pressure of the lubricating oil at the oil inlet, and the direction of the oil inlet is opposite to the extrusion force F exerted by the material on the rotating shaft. This design can make full use of the lubricating oil to offset part of the reaction force, reduce the deviation of the center of the rotating shaft from the center of the bearing seat, and then reduce the change in the gap between the rotating shaft and the bearing seat, reduce material leakage, and improve the safety of the extruder; 2. When the material is transported from the front channel to the rear channel, the rotating shaft drives the conveying disc to rotate. When the conveying disc drives the storage trough to communicate with the front channel, the material in the front channel is pressed into the storage trough. The conveying disc drives the storage trough and the material to rotate relative to the rear channel. Then the pressing block is inserted into the storage trough to press the material in the storage trough into the rear channel, thereby realizing the material transportation from the front channel to the rear channel and improving the isolation between the front channel and the rear channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a screw extruder pressure stabilizing device according to an embodiment of the present application.

[0027] Figure 2 It is a side view of a voltage stabilizing device.

[0028] Figure 3 is along Figure 2 Section view along line AA.

[0029] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0030] Figure 5 is along Figure 2 Sectional view along the CC line.

[0031] Figure 6 It is a front view of the processing installation part.

[0032] Figure 7 is along Figure 6 Sectional view along line DD.

[0033] Figure 8 It is a schematic diagram for showing the structure of the guide ring groove.

[0034] Description of reference numerals: 1. extruder; 11. processing and mounting portion; 12. material channel; 121. front channel; 122. rear channel; 13. filter screen; 14. mounting hole; 151. oil inlet; 152. oil outlet; 153. oil inlet channel; 154. oil outlet channel; 16. material pressing chamber; 2. material pressing and conveying assembly; 21. conveying plate; 22. material pressing piece; 221. pressing block; 222. sliding groove; 23. material storage tank; 2 4. Connecting piece; 241. Connecting rod; 242. Roller; 25. Guide ring groove; 251. First guide section; 252. Second guide section; 253. First transition section; 254. Second transition section; 3. Rotating shaft; 4. Bearing seat; 5. Lubricating oil supply system; 51. Oil pump; 52. Oil tank; 53. Oil return pipe; 54. Oil pipeline; 55. Cooling system; 551. Cooling water pipe; 56. Filter system; 6. Pressure sensor. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] The inventor of the present application found that the screw extruder 1 has a large safety hazard due to the blockage of the filter screen 13, and the gap between the rotating shaft 3 and the bearing seat 4 increases under the action of the material extrusion force, resulting in material leakage. Therefore, the present application mainly adopts a design scheme that uses lubricating oil to offset part of the force on the rotating shaft 3, so as to reduce the leakage of materials and improve the safety of the extruder 1.

[0037] Reference Figure 1 , Figure 2 A screw extruder pressure stabilizing device includes a material pressure delivery component 2, a rotating shaft 3 and a bearing seat 4. A processing installation part 11 is formed at the end of the extruder 1. A material channel 12 connected to the hot melt cavity of the extruder 1 is opened in the processing installation part 11. The processing installation part 11 is composed of two symmetrical parts, which is convenient for installing the mechanism in the processing rotating part.

[0038] Reference Figure 2 , Figure 3 A filter screen 13 is installed on the processing installation part 11, and the material pressure-feeding component 2 and the filter screen 13 are installed in series on the material channel 12, and the material pressure-feeding component 2 is arranged upstream of the filter screen 13. The material pressure-feeding component 2 divides the material channel 12 into a front channel 121 and a rear channel 122, and the material pressure-feeding component 2 presses the material from the front channel 121 to the rear channel 122.

[0039] Reference Figure 2 , Figure 3The rotating shaft 3 is connected to the material pressure-feeding component 2 and is located on both sides of the material pressure-feeding component 2. Two mounting holes 14 are arranged opposite to each other on the processing installation part 11. The two mounting holes 14 are communicated with the material channel 12. The bearing seat 4 corresponds to the mounting holes 14 one by one. The bearing seat 4 is plugged into the mounting holes 14. When the material pressure-feeding component 2 is installed in the material channel 12, the two rotating shafts 3 are respectively plugged into the corresponding shaft holes of the bearing seats 4 to form a sliding bearing structure. The shaft hole clearance of the rotating shaft 3 and the bearing seat 4 is matched, and the rotating shaft 3 is driven to rotate by an external motor.

[0040] Reference Figure 3 , Figure 4 The bearing seat 4 is provided with an oil inlet 151 and an oil outlet 152 which are connected to the shaft hole. The direction of the oil inlet 151 is opposite to the direction of the extrusion force F of the material on the rotating shaft 3. The oil outlet 152 is arranged relative to the oil inlet 151, which can effectively form a smooth flow path for the lubricating oil circuit, so that the lubricating oil entering the shaft hole can be smoothly discharged after completing the lubrication effect, avoiding the accumulation of lubricating oil inside the bearing seat 4, thereby reducing the heat accumulation and component wear caused by the retention of lubricating oil, and improving the stability of the operation of the rotating shaft 3 and the service life of the bearing seat 4.

[0041] Reference Figure 3 , Figure 4 An oil inlet channel 153 connected to the oil inlet 151 and an oil outlet channel 154 connected to the oil outlet 152 are provided on the processing installation part 11. The oil inlet channel 153 is connected to the lubricating oil supply system 5. The lubricating oil supply system 5 in this embodiment includes an oil pump 51 and an oil tank 52. The oil pump 51 and the oil tank 52 are connected by a pipeline, the oil tank 52 and the oil outlet channel 154 are connected by an oil return pipe 53, and the oil pump 51 and the oil inlet channel 153 are connected by an oil delivery pipe 54. The specific steps of the lubricating oil circulation are as follows: the oil pump 51 transports the lubricating oil in the oil tank 52 to the shaft hole through the oil delivery pipe 54, the oil inlet channel 153, and the oil inlet 151. After lubricating the rotating shaft 3, the oil flows out through the oil outlet 152 to the oil return pipe 53, and finally flows back to the oil tank 52, ensuring that the lubricating oil can be recycled and reducing resource waste. The oil pump 51 is a screw pump, and its rotation speed is adjusted by a frequency converter to adjust the flow rate of the oil pump 51.

[0042] When the extruder 1 is extruding the material, the rotating shaft 3 drives the material pressing and conveying assembly 2 to rotate, and the material is conveyed from the front channel 121 to the rear channel 122. The material in the rear channel 122 is filtered by the filter screen 13 and discharged from the discharge port, completing the filtering of the material.

[0043] When the filter 13 is clogged, the pressure of the material in the rear channel 122 is greater than the pressure of the material in the front channel 121, and the material generates an extrusion force F on the rotating shaft 3 toward the front channel 121. At this time, the flow of the oil pump 51 is adjusted, and the lubricating oil supply system 5 increases the oil inlet pressure of the lubricating oil at the oil inlet 151. The direction of the oil inlet 151 is opposite to the extrusion force F exerted by the material on the rotating shaft 3, which can fully utilize the lubricating oil to offset part of the reaction force, reduce the offset of the center of the rotating shaft 3 from the center of the bearing seat 4, and then reduce the change in the gap between the rotating shaft 3 and the bearing seat 4, reduce material leakage, and improve the safety of the extruder 1.

[0044] Reference Figure 3 , Figure 4 A cooling system 55 is provided on the oil return pipe 53. The cooling system 55 in this embodiment is a cooling water pipe 551. The cooling water pipe 551 is wound around the oil return pipe 53 to cool the circulating lubricating oil, which helps to maintain the stability of the entire lubrication system and extend the service life of the lubricating oil. At the same time, it reduces equipment wear caused by high temperature, thereby improving the overall operating efficiency and reliability of the screw extruder 1.

[0045] Reference Figure 3 , Figure 4 A filtering system 56 is connected in series to the oil return pipe 53. The filtering system 56 in this embodiment includes but is not limited to a filter screen, a centrifugal filter, and a magnetic filter. The filtering system 56 is located upstream of the cooling system 55. The filtering system 56 connected in series to the oil return pipe 53 can remove impurities in the lubricating oil to prevent the impurities from causing wear to the rotating shaft 3 and the bearing seat 4, thereby improving the reliability of equipment operation.

[0046] Reference Figure 2 , Figure 5 , two groups of pressure sensors 6 are arranged on the processing installation part 11, and the two groups of pressure sensors 6 are respectively inserted into the material channel 12, and the two groups of pressure sensors 6 are respectively arranged on the front section channel 121 and the rear section channel 122, which can monitor the pressure changes in the material channel 12 on both sides of the material pressure delivery component 2. This arrangement can obtain the pressure distribution data of the material during the transportation process in real time, so as to more accurately reflect the flow state of the material. Specifically, the pressure sensor 6 located upstream of the material pressure delivery component 2 can be used to detect the pressure accumulation of the material in the front section channel 121, while the pressure sensor 6 located downstream is used to monitor the pressure release of the material in the rear section channel 122. The combination of the two can effectively determine whether the material passes through the filter screen 13 smoothly, and promptly discover possible blockages or other abnormal problems, thereby improving the working stability and production efficiency of the entire screw extruder 1.

[0047] Reference Figure 2 , Figure 5The processing installation part 11 is provided with a material pressing chamber 16 connected in series with the material channel 12, and the material pressing chamber 16 is located between the front section channel 121 and the rear section channel 122. The material pressing and conveying assembly 2 in this embodiment includes a conveying plate 21 and a material pressing member 22 (such as Figure 7 ), the conveying disc 21 is adapted to the material pressing chamber 16, so that the peripheral side wall of the conveying disc 21 is opposite to the front section channel 121 and the rear section channel 122, and the rotating shaft 3 is coaxially fixedly connected with the conveying disc 21. A storage trough 23 is provided on the peripheral side wall of the conveying disc 21, and the cross section of the storage trough 23 is fan-shaped. When the conveying disc 21 rotates, the conveying disc 21 drives the storage trough 23 to communicate with the front section channel 121, and the material is squeezed into the storage trough 23. Then, the conveying disc 21 drives the storage trough 23 to rotate to communicate with the rear section channel 122. At this time, the storage trough 23 is isolated from the front section channel 121, and the material pressing piece 22 presses the material in the storage trough 23 out.

[0048] Reference Figure 6 , Figure 7 The pressing member 22 in this embodiment includes a pressing block 221. A sliding groove 222 is opened on the top wall of the rear channel 122. The pressing block 221 is slidably connected in the sliding groove 222. The pressing block 221 can slide along the radial direction of the conveying disk 21 in the sliding groove 222. The pressing block 221 is connected to the conveying disk 21 through a connecting member 24. The connecting member 24 in this embodiment includes a connecting rod 241, which is an L-shaped rod and is slidably embedded in the processing installation part 11. One end of the connecting rod 241 extends into the sliding groove 222 and is fixedly connected to the pressing block 221. The minimum width of the storage tank 23 along the circumference of the conveying disk 21 is greater than the maximum width of the pressing block 221 in this direction, so that the pressing block 221 slides a distance in the storage tank 23 and then slides out of the storage tank 23. Since the minimum width of the storage tank 23 along the circumference of the conveying disk 21 is designed to be greater than the maximum width of the pressing block 221 in this direction, this size difference effectively avoids interference between the two, thereby achieving smooth cooperation between the pressing block 221 and the storage tank 23. This design not only improves the stability of the material conveying process, but also reduces the risk of failure caused by mechanical jamming during equipment operation.

[0049] Reference Figure 8 A guide ring groove 25 is provided on the end surface of the conveying disc 21, and the other section of the connecting rod 241 is inserted into the guide ring groove 25. The section of the connecting rod 241 inserted into the guide ring groove 25 is rotatably connected to a roller 242, and the roller 242 rolls along the guide ring groove 25, which significantly reduces the friction resistance between the connecting rod 241 and the guide ring groove 25, improves the transmission efficiency and prolongs the service life of the components.

[0050] Reference Figure 8The guide ring groove 25 includes a first guide section 251, a second guide section 252, a first transition section 253 and a second transition section 254. The first guide section 251 and the second guide section 252 are connected by the first transition section 253 and the second transition section 254. The central angles corresponding to the second guide section 252, the first transition section 253 and the second transition section 254 are the same as the central angles corresponding to the material storage groove 23. The diameter of the second guide section 252 is smaller than the diameter of the first guide section 251, and the difference in radial distance between the two is equal to the depth of the material storage groove 23. When the roller 242 slides in the first guide section 251, the pressing block 221 remains stationary on the outside of the conveying plate 21; when the roller 242 slides in the first transition section 253, the connecting rod 241 pulls the pressing block 221 to insert into the storage trough 23; when the roller 242 slides in the second guide section 252, the pressing block 221 slides in the storage trough 23 and squeezes the material in the storage trough 23 into the rear section channel 122; when the roller 242 slides in the second transition section 254, the pressing block 221 gradually slides out of the storage trough 23.

[0051] When the material is transported from the front channel 121 to the rear channel 122, the rotating shaft 3 drives the conveying plate 21 to rotate. When the conveying plate 21 drives the storage trough 23 to communicate with the front channel 121, the material in the front channel 121 is pressed into the storage trough 23, and the conveying plate 21 drives the storage trough 23 and the material to rotate to be opposite to the rear channel 122. At this time, the roller 242 slides along the first transition section 253, and the pressing block 221 is inserted into the storage trough 23. As the conveying plate 21 rotates, the roller 242 moves in the second guide section 252, and the pressing block 221 slides in the storage trough 23 to press the material in the storage trough 23 out, and the material enters the rear channel 122. The roller 242 moves in the second transition section 254, and the pressing block 221 slides out of the storage trough 23, thereby realizing the material transportation from the front channel 121 to the rear channel 122 and improving the isolation between the front channel 121 and the rear channel 122.

[0052] The first guide section 251 enables the pressing block 221 to slide stably on the side wall of the conveying plate 21, ensuring that the material will not enter the storage tank 23 in advance; the first transition section 253 accurately guides the pressing block 221 to insert into the storage tank 23 to avoid jamming; the second guide section 252 ensures that the pressing block 221 moves smoothly in the storage tank 23 to complete the material compaction process; the second transition section 254 effectively guides the pressing block 221 to exit from the storage tank 23 to prepare for the next material filling. This design significantly improves the material transmission efficiency and stability, while reducing the equipment operation failure rate.

[0053] The implementation principle of the screw extruder pressure stabilizing device of the present application embodiment is as follows: when the extruder 1 is extruding the material and discharging the material, the rotating shaft 3 drives the conveying disc 21 to rotate, and the conveying disc 21 drives the storage tank 23 to communicate with the front section channel 121, and the material in the front section channel 121 is pressed into the storage tank 23, and the conveying disc 21 drives the storage tank 23 and the material to rotate to be opposite to the rear section channel 122, at this time, the roller 242 slides along the first transition section 253, and the pressing block 221 is inserted into the storage tank 23, and then the roller 242 slides along the first transition section 253, and the pressing block 221 is inserted into the storage tank 23. As the conveying disc 21 rotates, the roller 242 moves in the second guide section 252, and the pressing block 221 slides in the storage trough 23 to press the material in the storage trough 23 out, and the material enters the rear channel 122. The roller 242 moves in the second transition section 254, and the pressing block 221 slides out of the storage trough 23, thereby realizing the material transportation from the front channel 121 to the rear channel 122. After the material in the rear channel 122 is filtered by the filter screen 13, it is discharged from the discharge port, and the filtering of the material is completed.

[0054] When the filter 13 is blocked, the pressure of the material in the rear channel 122 is greater than the pressure of the material in the front channel 121, and the material generates an extrusion force F on the rotating shaft 3 toward the front channel 121. At this time, the flow of the oil pump 51 is adjusted, and the lubricating oil supply system increases the oil inlet pressure of the lubricating oil at the oil inlet 151. The direction of the oil inlet 151 is opposite to the extrusion force F exerted by the material on the rotating shaft 3, which can fully utilize the lubricating oil to offset part of the reaction force, reduce the offset of the center of the rotating shaft 3 from the center of the bearing seat 4, and then reduce the change in the gap between the rotating shaft 3 and the bearing seat 4, reduce material leakage, and improve the safety of the extruder 1.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A screw extruder pressure stabilizing device, characterized in that: The invention comprises a material pressing and conveying component (2), a rotating shaft (3) and a bearing seat (4); the rotating shaft (3) is connected to the material pressing and conveying component (2) so as to be able to drive the material pressing and conveying component (2) to work; the material pressing and conveying component (2) is arranged in a material channel (12) upstream of a filter screen (13) so as to be able to squeeze the material through the filter screen (13); the part of the material channel (12) located upstream of the material pressing and conveying component (2) is a front channel (121), and the part located downstream of the material pressing and conveying component (2) is a rear channel (122); The rotating shaft (3) and the shaft hole on the bearing seat (4) are clearance-matched; The bearing seat (4) is provided with an oil inlet (151), the oil inlet (151) is connected to the lubricating oil supply system (5) via an oil delivery pipe (54), the oil inlet (151) is connected to the shaft hole, the direction of the oil inlet (151) is opposite to the direction of the extrusion force F exerted by the material on the rotating shaft (3), and the lubricating oil supply system (5) can adjust the oil flow rate of the oil inlet (151).

2. The screw extruder pressure stabilizing device according to claim 1, characterized in that: The extruder (1) is provided with two groups of pressure sensors (6) which are connected to the material channel (12), and the two groups of pressure sensors (6) are respectively arranged on both sides of the material pressure delivery component (2).

3. The screw extruder pressure stabilizing device according to claim 1, characterized in that: The bearing seat (4) is provided with an oil outlet (152) which is communicated with the shaft hole, and the oil outlet (152) is opposite to the oil inlet (151).

4. The screw extruder pressure stabilizing device according to claim 3, characterized in that: The oil outlet (152) is connected to the lubricating oil supply system (5) via an oil return pipe (53) so that the lubricating oil can circulate. The oil return pipe (53) is connected in series with a filtering system (56) so as to filter impurities in the lubricating oil.

5. The screw extruder pressure stabilizing device according to claim 4, characterized in that: The oil return pipe (53) is provided with a cooling system (55).

6. The voltage stabilizing device for a screw extruder according to claim 1, characterized in that: The material pressing and conveying assembly (2) comprises a conveying disc (21) and a pressing piece (22); the extruder (1) is provided with a pressing chamber (16) connected in series to the material channel (12); the pressing chamber (16) is adapted to the conveying disc (21); the conveying disc (21) is coaxially fixedly connected to the rotating shaft (3); a material storage trough (23) is provided on the conveying disc (21); the conveying disc (21) can drive the material storage trough (23) to communicate with the front section channel (121) and the rear section channel (122) respectively; the pressing piece (22) can press the material in the material storage trough (23) into the rear section channel (122) so as to convey the material in the front section channel (121) to the rear section channel (122).

7. The voltage stabilizing device for a screw extruder according to claim 6, characterized in that: The pressing member (22) includes a pressing block (221), which is located in the rear section channel (122) and is slidably connected to the extruder (1). The conveying disc (21) and the pressing block (221) are connected via a connecting member (24) so ​​as to be able to drive the pressing block (221) to be inserted into the material storage trough (23).

8. The voltage stabilizing device for a screw extruder according to claim 7, characterized in that: The minimum width of the material storage trough (23) along the circumference of the conveying plate (21) is greater than the maximum width of the pressing block (221) in this direction, so that the pressing block (221) can slide into and out of the material storage trough (23).

9. The voltage stabilizing device for a screw extruder according to claim 7, characterized in that: The connecting member (24) comprises a connecting rod (241), a guide ring groove (25) is provided on the end surface of the conveying plate (21), one end of the connecting rod (241) is fixedly connected to the pressing block (221), and the other end is inserted into the guide ring groove (25); The guide ring groove (25) comprises a first guide section (251), a second guide section (252), a first transition section (253) and a second transition section (254); the first guide section (251) and the second guide section (252) are connected via the first transition section (253) and the second transition section (254); the first guide section (251) can guide the pressing block (221) to slide on the side wall of the conveying plate (21); the first transition section (253) can guide the pressing block (221) to be inserted into the material storage trough (23); the second guide section (252) can guide the pressing block (221) to slide in the material storage trough (23); and the second transition section (254) can guide the pressing block (221) to slide out of the material storage trough (23).

10. The voltage stabilizing device for a screw extruder according to claim 9, characterized in that: A roller (242) is provided at one end of the connecting rod (241) inserted into the guide ring groove (25); the roller (242) is rotatably connected to the connecting rod (241) and is adapted to fit in the guide ring groove (25).

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