Parameter-adjustable horizontal scraper discharging centrifugal machine based on permanent magnet dual-motor driving

Abstract

The invention relates to the technical field of centrifugal machines, and provides a parameter-adjustable horizontal scraper discharging centrifugal machine based on permanent magnet dual-motor driving, which comprises a shell, a sieve basket, a scraper, a first main shaft, a second main shaft, a first rotation driving piece and a second rotation driving piece, the first main shaft and the second main shaft are rotatably arranged in the shell, the first main shaft is a hollow shaft, and the second main shaft is a hollow shaft; the second main shaft is sleeved with the first main shaft, the screen basket is arranged on the first main shaft, the scraper is arranged on the second main shaft, the scraper is located in the screen basket and used for scraping materials attached to the inner wall of the screen basket to conduct spiral discharging, the first rotation driving part and the second rotation driving part are both arranged in the shell, and the first main shaft is in driving connection with the first rotation driving part. The second main shaft is in driving connection with the second rotation driving piece. By means of the technical scheme, the problem that in the prior art, the rotating speed of the screen basket and the rotating speed of the scraper of the horizontal scraper discharging centrifugal machine cannot be freely adjusted in real time is solved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifuges, and in particular to a parameter-adjustable horizontal scraper unloading centrifuge driven by a permanent magnet dual motor. Background Art

[0002] With the widespread application of underground mining equipment and the mining of thin coal seams, the crushing rate of raw coal is getting higher and higher, resulting in an increase in the amount of coarse coal slime selected in coal washing plants year by year. The horizontal scraper unloading coal slime centrifuge has become a new generation of large-capacity coarse coal slime dehydration equipment gradually favored by many coal preparation plants. It is mainly used for the dehydration of coarse coal slime with a particle size of 0-3mm in coal preparation plants or the solid-liquid separation of similar materials. It adopts a single motor and a single pulley drive, and realizes the speed difference between the spiral scraper and the screen basket through a planetary cycloidal pinwheel differential.

[0003] The high-speed rotation of the screen basket provides centrifugal force. The screen basket speed determines the magnitude of the centrifugal force, which directly affects the moisture content of the product. There is a speed difference between the scraper and the screen basket. The scraper relies on the speed difference to scrape the material attached to the inner wall of the screen basket for unloading. The size of the speed difference determines the unloading speed, which directly affects the processing capacity and product moisture content. The dehydration time and centrifugal factor of the material are the key parameters that determine the dehydration effect of the centrifuge. The inability to freely adjust the speed difference between the screen basket and the scraper and the material dehydration time restricts the realization of the adjustment and optimization of the key process parameters of the equipment.

[0004] The currently used horizontal scraper unloading coal slime centrifuge is driven by a single motor and a single pulley. The planetary cycloidal pinwheel differential is used to drive the scraper and the screen basket to rotate and the speed difference. Since the planetary cycloidal pinwheel differential transmission ratio is fixed, when a fixed frequency motor is selected, the screen basket speed and the scraper speed are constant, and the speed difference is constant. The screen basket speed and the speed difference between the screen basket and the scraper cannot be adjusted; even if a variable frequency motor is selected, since the planetary cycloidal pinwheel differential transmission ratio is fixed, the screen basket speed and the speed difference between the screen basket and the scraper can only increase or decrease in proportion, and the perfect match between the two cannot be achieved, and the dual goals of product moisture and processing capacity cannot be achieved.

[0005] The existing technology has not provided a good solution to the above problems, which has brought troubles to the normal operation of work in this field. Therefore, there is an urgent need for a parameter-adjustable horizontal scraper unloading centrifuge driven by a permanent magnet dual motor to solve the problem that the screen basket speed and scraper speed cannot be freely adjusted in real time. Summary of the invention

[0006] The present invention proposes a parameter-adjustable horizontal scraper unloading centrifuge driven by a permanent magnet dual motor, which solves the problem in the related art that the screen basket speed and the scraper speed of the horizontal scraper unloading centrifuge cannot be freely adjusted in real time.

[0007] The technical solution of the present invention is as follows: a parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive, comprising a shell, a screen basket, a scraper, a first spindle, a second spindle, a first rotating drive member and a second rotating drive member, the first spindle and the second spindle are both rotatably arranged in the shell, the first spindle is a hollow shaft, the first spindle is sleeved outside the second spindle, the screen basket is arranged on the first spindle, the scraper is arranged on the second spindle, the scraper is located in the screen basket, and is used to scrape off the material attached to the inner wall of the screen basket for spiral unloading, the first rotating drive member and the second rotating drive member are both arranged in the shell, the first spindle is drivingly connected to the first rotating drive member, and the second spindle is drivingly connected to the second rotating drive member.

[0008] Optionally, it also includes a bearing box, bearing 1 and bearing 2, the bearing box is bolted to the rear of the shell, the first main shaft and the second main shaft both pass through the bearing box, the bearing 1 is arranged between the first main shaft and the second main shaft, the bearing 2 is arranged between the inner wall of the bearing box and the first main shaft, and two bearings are provided.

[0009] Optionally, it further comprises an oil seal 1 and an oil seal 2, wherein the oil seal 1 is arranged between the first main shaft and the second main shaft, and the oil seal 2 is arranged between the bearing box and the first main shaft. A lubrication chamber 1 is formed between the first main shaft and the second main shaft, and a lubrication chamber 2 is formed between the bearing box and the first main shaft. Two of the oil seal 1 and the oil seal 2 are provided, the two oil seals 1 are used to seal the lubrication chamber 1, and the two oil seals 2 are used to seal the lubrication chamber 2.

[0010] Optionally, the first main shaft has a through hole 1 for connecting the lubrication chamber 1 and the lubrication chamber 2, the second main shaft is a hollow shaft, the second main shaft has a through hole 2 for connecting the lubrication chamber 1 and the interior of the second main shaft, and also includes a lubrication system, the lubrication system is used to provide lubricating oil to the interior of the second main shaft, the lubrication chamber 1 and the lubrication chamber 2.

[0011] Optionally, the lubrication system includes an oil tank, an oil pump and an oil pipe. The oil tank is arranged behind the shell and at the bottom of the bearing box for storing lubricating oil. The oil pump is arranged in the oil tank. One end of the oil pipe is connected to the oil pump, and the other end is connected to the end of the second main shaft by means of a rotary joint. The bottom of the bearing box has an oil return port, and the oil return port is connected to the oil tank.

[0012] Optionally, the sieve basket includes a support plate, a plurality of sieve plates and a sealing strip, the support plate is coaxially arranged at the end of the first main shaft, the sieve plate is swingably arranged on the support plate, the plurality of sieve plates are evenly distributed along the circumference of the support plate, the plurality of sieve plates are gathered together to the middle to form a sealed centrifugal space, and the plurality of sieve plates are opened together to the outside to move away from the scraper, and the sealing strip is arranged on the side of the sieve plate to abut against the sealing strip on the adjacent side of the sieve plate.

[0013] Optionally, the inner wall of the shell has a dividing ring, which divides the interior of the shell into a discharge chamber and a liquid discharge chamber, the discharge chamber has a discharge port, the liquid discharge chamber has a liquid discharge port, and the end of the screen basket is located in the discharge chamber.

[0014] Optionally, it further comprises a rotating rail, a slider and a stabilizing roller, wherein the rotating rail is arranged at the free end of the sieve plate, and when a plurality of the sieve plates are gathered together, the plurality of rotating rails form a complete annular track, the slider is slidably arranged on the separation ring, and the stabilizing roller is rotatably arranged on the slider, and the slider and the stabilizing roller are both plural. The rotating rail is provided with an extrusion surface and an opening surface. After the sliding block slides, the stabilizing roller abuts against the extrusion surface or the opening surface. The stabilizing roller abuts against the extrusion surface to provide a force for bringing the multiple screen plates together, and the stabilizing roller abuts against the opening surface to provide a force for opening the multiple screen plates.

[0015] Optionally, it also includes an adjustment ring and a limit column, the adjustment ring is rotatably arranged in the shell, the adjustment ring has a plurality of curved grooves, the limit column is arranged on the slider, the limit column is located in the curved groove, the adjustment ring has a lever, and the lever protrudes out of the shell.

[0016] Optionally, it also includes a distribution pipe and a feed pipe, the distribution pipe is coaxially arranged at the end of the second main shaft, the outer wall of the distribution pipe has a plurality of strip-shaped discharge holes, the screen basket and the distribution pipe are both conical and have the same taper, and the feed pipe is detachably arranged on the shell to extend into the distribution pipe and transport material into the distribution pipe.

[0017] The working principle and beneficial effects of the present invention are: This solution can achieve real-time and independent adjustment of the screen basket speed and scraper speed, overcoming the problem in the prior art that the speed cannot be freely adjusted due to the fixed transmission ratio of the planetary cycloid pinwheel differential. This allows the process parameters to be flexibly adjusted according to actual conditions to optimize the dehydration effect when facing coarse coal slime or similar materials with different particle sizes, moisture content and other properties.

[0018] By freely adjusting the screen basket speed and scraper speed, the speed relationship between the two can be better matched. While reducing the moisture content of the product, the rationality of the scraper unloading speed can be ensured, thereby improving the processing capacity of the equipment, achieving the dual-optimization goals of product moisture content and processing capacity, improving the product quality after dehydration of coarse coal slime, and facilitating subsequent coal processing and utilization.

[0019] In summary, since key parameters can be freely adjusted according to different working conditions, the equipment can better adapt to complex situations such as high raw coal crushing rate and changes in the amount of coarse coal slime selected due to the widespread use of underground mining equipment and thin coal seam mining, ensure the stable and efficient operation of the coal preparation plant, provide strong support for the normal work of the coal preparation plant, and solve the troubles brought to the work in this field by the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0021] Figure 1 It is a schematic diagram of the appearance of a parameter-adjustable horizontal scraper discharge centrifuge driven by a permanent magnet dual motor; Figure 2 It is a schematic diagram of the internal structure of a parameter-adjustable horizontal scraper unloading centrifuge driven by a permanent magnet dual motor; Figure 3 It is a cross-sectional view of the internal structure of a parameter-adjustable horizontal scraper discharge centrifuge driven by a permanent magnet dual motor; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 is a schematic diagram of the structure of the adjustment ring; Figure 6 is a schematic diagram of the structure of the screen basket; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 is a schematic diagram of the structure of the scraper; Fig. 9 It is a schematic diagram of the structure of the distribution pipe.

[0022] In the figure: 1, housing, 2, screen basket, 3, scraper, 4, first spindle, 5, second spindle, 6, first rotating drive member, 7, second rotating drive member, 8, bearing box, 9, bearing 1, 10, bearing 2, 11, oil seal 1, 12, oil seal 2, 13, lubrication chamber 1, 14, lubrication chamber 2, 15, through hole 1, 16, through hole 2, 17, oil tank, 18, oil pump, 19, oil pipe, 20, rotary joint, 21, Oil return port, 201, support plate, 202, sieve plate, 203, sealing strip, 38, dividing ring, 22, discharge chamber, 23, drainage chamber, 24, discharge port, 25, drainage port, 26, rotating rail, 27, slider, 28, stabilizing roller, 29, extrusion surface, 30, opening surface, 31, adjusting ring, 32, limiting column, 33, curved slide groove, 34, lever, 35, distribution pipe, 36, feed pipe, 37, discharge hole. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0024] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0025] In this document, 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; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] Reference Figure 1 to Figure 9, which is the first embodiment of the present invention, proposes a parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive, including a shell 1, a screen basket 2, a scraper 3, a first spindle 4, a second spindle 5, a first rotating drive member 6 and a second rotating drive member 7, the first spindle 4 and the second spindle 5 are both rotatably arranged in the shell 1, the first spindle 4 is a hollow shaft, the first spindle 4 is sleeved outside the second spindle 5, the screen basket 2 is arranged on the first spindle 4, the scraper 3 is arranged on the second spindle 5, the scraper 3 is located in the screen basket 2, and is used to scrape off the material attached to the inner wall of the screen basket 2 for spiral unloading, the first rotating drive member 6 and the second rotating drive member 7 are both arranged in the shell 1, the first spindle 4 is drivingly connected to the first rotating drive member 6, and the second spindle 5 is drivingly connected to the second rotating drive member 7.

[0028] In this embodiment, the screen basket 2 is mounted on the first main shaft 4, and rotates at high speed with the rotation of the first main shaft 4. During the rotation, centrifugal force is provided to the material, so that the material moves toward the inner wall of the screen basket 2 due to the centrifugal force in the screen basket 2, and the solid remains inside the screen basket 2, while the liquid passes through the screen basket 2 to achieve solid-liquid separation. The screen basket 2 is a conical structure made of a non-magnetic stainless steel screen. The size of the screen gap can be selected according to demand. The scraper 3 is also a conical structure with the same taper as the screen basket 2. The scraper 3 includes 6-10 spiral blades uniformly welded on the outer wall. There is a speed difference between the scraper 3 and the screen basket 2, and the scraper 3 has the function of spiral conveying, conveying the material along the downhill direction of the screen basket 2 to complete the unloading. A support ring is welded inside the scraper 3 to increase the strength of the scraper 3.

[0029] The first rotating driving member 6 drives the first main shaft 4 to rotate, Figure 3 The driving form of the belt pulley and the transmission belt is shown in the figure, and the belt pulley and the transmission belt are mechanical simplified drawings. Since the first main shaft 4 drives the screen basket 2, the rotation speed of the screen basket 2 can be adjusted by controlling the first rotating drive member 6 (permanent magnet synchronous motor). Similarly, the second rotating drive member 7 drives the second main shaft 5 to rotate, thereby driving the scraper 3 to rotate. The speed of the scraper 3 can be adjusted by controlling the second rotating drive member 7 (permanent magnet synchronous motor). In actual operation, the first rotating drive member 6 and the second rotating drive member 7 can be independently controlled according to factors such as the nature of the material, the processing volume, and the requirements for the moisture content of the product, so as to achieve real-time and separate adjustment of the rotation speed of the screen basket 2 and the rotation speed of the scraper 3. For example, when it is necessary to reduce the moisture content of the product, the rotation speed of the screen basket 2 can be appropriately increased to enhance the centrifugal force. At the same time, the speed of the scraper 3 can be reasonably adjusted according to the unloading situation of the scraper 3 to ensure smooth unloading.

[0030] This solution can achieve real-time and independent adjustment of the rotation speed of the screen basket 2 and the rotation speed of the scraper 3, overcoming the problem in the prior art that the rotation speed cannot be freely adjusted due to the fixed transmission ratio of the planetary cycloid pinwheel differential. This makes it possible to flexibly adjust the process parameters according to the actual situation and optimize the dehydration effect when facing coarse coal slime or similar materials with different particle sizes, moisture content and other properties.

[0031] By freely adjusting the rotation speed of the screen basket 2 and the rotation speed of the scraper 3, the rotation speed relationship between the two can be better matched. While reducing the moisture content of the product, the rationality of the unloading speed of the scraper 3 can be ensured, thereby improving the processing capacity of the equipment, achieving the dual-optimization goals of product moisture content and processing capacity, improving the product quality after dehydration of coarse coal slime, and facilitating the subsequent coal processing and utilization.

[0032] In order to more clearly illustrate the advantages of the dual-motor driven, parameter-adjustable horizontal scraper discharge centrifuge over the traditional differential type horizontal scraper discharge centrifuge, an example is given below: Case 1: The feed volume is small, the feed moisture is high, and the product moisture is required to be low. When using a traditional differential type horizontal scraper unloading centrifuge for dehydration, the centrifugal force and dehydration time are constant and cannot be adjusted, and the moisture content of the obtained product is constant and cannot be adjusted. If a variable frequency motor is selected, since the speed ratio of the screen basket 2 and the scraper 3 is constant, if the centrifugal force is increased, the speed needs to be increased, and the speed difference increases accordingly, then the dehydration time is reduced, and the wear of the screen basket 2 and the scraper 3 is accelerated; if the dehydration time is increased, the speed difference needs to be reduced, and the speed is reduced accordingly, then the centrifugal force is reduced. Both solutions contain unfavorable factors and cannot achieve a perfect ratio. In this solution, the horizontal scraper unloading centrifuge with adjustable parameters based on permanent magnet dual motor drive, the speeds of the screen basket 2 and the scraper 3 are respectively frequency-controlled by two motors. It is only necessary to select an appropriate screen basket 2 speed to provide a suitable centrifugal force, and select an appropriate scraper 3 speed at the same time, reduce the speed difference, and extend the dehydration time to obtain a low-moisture product. While meeting the moisture content of the product, the rotation speeds of the sieve basket 2 and the scraper 3 can be reduced so that they can be kept running under lower rotation speeds of the sieve basket 2 and the speed difference between the sieve basket 2 and the scraper 3. This can reduce the wear of the sieve basket 2 and the scraper 3, extend their service life, reduce power consumption, and reduce use costs.

[0033] Case 2: The feed volume is large and the feed moisture content is low. This working condition requires increasing the speed difference between the screen basket 2 and the scraper 3 to achieve the purpose of rapid unloading. Due to the low feed moisture content, the speed of the screen basket 2 can be appropriately reduced. When using a traditional differential-type horizontal scraper unloading centrifuge for dehydration, the centrifugal force and dehydration time are constant and cannot be adjusted, and the moisture content of the obtained product is constant and cannot be adjusted. If a variable frequency motor is selected, since the speed ratio of the screen basket 2 and the scraper 3 is constant, if the speed difference between the screen basket 2 and the scraper 3 is increased, the speed needs to be increased, and the speed of the screen basket 2 will increase accordingly, which will accelerate the wear of the screen basket 2 and the scraper 3 and consume a lot of power; if the centrifugal force is reduced, the speed difference needs to be reduced, and the speed difference is reduced accordingly, then the unloading is slow and cannot meet the large processing volume. Both solutions contain unfavorable factors and cannot achieve a perfect ratio. In the horizontal scraper unloading centrifuge with adjustable parameters based on permanent magnet dual motor drive of the present invention, the rotation speeds of the screen basket 2 and the scraper 3 are respectively frequency-controlled by two motors. It only needs to select an appropriate rotation speed of the screen basket 2 to provide a suitable centrifugal force. The rotation speed of the screen basket 2 can be reduced as much as possible while meeting the moisture requirement, thereby saving power consumption and reducing the wear of the screen basket 2. At the same time, an appropriate rotation speed of the scraper 3 can be selected to increase the rotation speed difference, speed up the unloading speed and meet the large processing capacity.

[0034] In summary, since key parameters can be freely adjusted according to different working conditions, the equipment can better adapt to complex situations such as high raw coal crushing rate and changes in the amount of coarse coal slime selected due to the widespread use of underground mining equipment and thin coal seam mining, ensure the stable and efficient operation of the coal preparation plant, provide strong support for the normal work of the coal preparation plant, and solve the troubles brought to the work in this field by the existing technology.

[0035] Furthermore, it also includes a bearing box 8, a bearing 1 9 and a bearing 2 10. The bearing box 8 is bolted to the rear of the housing 1. The first main shaft 4 and the second main shaft 5 both pass through the bearing box 8. The bearing 1 9 is arranged between the first main shaft 4 and the second main shaft 5. The bearing 2 10 is arranged between the inner wall of the bearing box 8 and the first main shaft 4. There are two bearings 1 9 and two bearings 2 10.

[0036] Furthermore, it also includes an oil seal 11 and an oil seal 12. The oil seal 11 is arranged between the first main shaft 4 and the second main shaft 5, and the oil seal 12 is arranged between the bearing box 8 and the first main shaft 4. A lubrication chamber 13 is formed between the first main shaft 4 and the second main shaft 5, and a lubrication chamber 2 14 is formed between the bearing box 8 and the first main shaft 4. Two of the oil seal 1 1 and the oil seal 2 12 are provided. The two oil seals 11 are used to seal the lubrication chamber 1 13 , and the two oil seals 2 12 are used to seal the lubrication chamber 2 14 .

[0037] Furthermore, the first main shaft 4 has a through hole 15 for connecting the lubrication chamber 13 and the lubrication chamber 2 14. The second main shaft 5 is a hollow shaft. The second main shaft 5 has a through hole 2 16 for connecting the lubrication chamber 1 13 and the interior of the second main shaft 5. The second main shaft 5 also includes a lubrication system for providing lubricating oil to the interior of the second main shaft 5, the lubrication chamber 1 13 and the lubrication chamber 2 14.

[0038] Furthermore, the lubrication system includes an oil tank 17, an oil pump 18 and an oil pipe 19. The oil tank 17 is arranged behind the housing 1 and at the lower part of the bearing box 8, and is used to store lubricating oil. The oil pump 18 is arranged in the oil tank 17. One end of the oil pipe 19 is connected to the oil pump 18, and the other end is connected to the end of the second main shaft 5 by means of a rotary joint 20. The bottom of the bearing box 8 has an oil return port 21, and the oil return port 21 is connected to the oil tank 17.

[0039] In this embodiment, two bearings 1 9 are arranged between the first main shaft 4 and the second main shaft 5, so that the first main shaft 4 and the second main shaft 5 can realize differential rotation, meeting the operation requirements of the scraper 3 and the screen basket 2 at different speeds. At the same time, two bearings 2 10 are arranged between the inner wall of the bearing box 8 and the first main shaft 4, ensuring that the first main shaft 4 can stably rotate differentially relative to the inner wall of the bearing box 8. In addition, the two bearings 1 9 and the two bearings 2 10 provide stable support and positioning for the first main shaft 4 and the second main shaft 5, ensuring that the first main shaft 4 and the second main shaft 5 can rotate stably and smoothly.

[0040] In order to prevent the leakage of lubricating oil, two oil seals 11 are arranged between the first main shaft 4 and the second main shaft 5, and two oil seals 2 12 are arranged between the bearing box 8 and the first main shaft 4. A lubricating cavity 13 is formed between the first main shaft 4 and the second main shaft 5, and a lubricating cavity 2 14 is formed between the bearing box 8 and the first main shaft 4.

[0041] The oil tank 17 is arranged at the rear of the housing 1 and at the lower part of the bearing box 8, and is used to store lubricating oil. The oil pump 18 is located in the oil tank 17. When the equipment is started, the oil pump 18 starts to work and draws lubricating oil from the oil tank 17. The lubricating oil is transported through the oil pipe 19. One end of the oil pipe 19 is connected to the oil pump 18, and the other end is connected to the end of the second main shaft 5 by means of a rotary joint 20. When the oil pipe 19 is set, it should avoid interference with other components, such as being set close to the inner wall of the housing 1. The lubricating oil enters the rotary joint 20 along the oil pipe 19, and then enters the inside of the second main shaft 5. Since the second main shaft 5 is a hollow shaft and has a through hole 16, the lubricating oil enters the lubricating cavity 13 through the through hole 16 to lubricate the two bearings 9 in the lubricating cavity 13. In this process, the two oil seals 11 effectively seal the lubricating cavity 13 to prevent the leakage of lubricating oil. Afterwards, the lubricating oil enters the lubricating chamber 2 14 through the through hole 15 on the first main shaft 4 to lubricate the two bearings 2 10 therein, and the two oil seals 2 12 ensure that the lubricating oil in the lubricating chamber 2 14 does not leak. As the lubricating oil pressure in the bearing box 8 gradually increases, the lubricating oil flows back to the oil tank 17 from the oil return port 21 at the bottom of the bearing box 8. In addition, an oil filter is provided to filter out impurities in the lubricating oil when it flows through, thereby ensuring the cleanliness of the lubricating oil during the circulation process, thereby realizing the recycling of the lubricating oil and ensuring the stable operation of the entire lubrication system.

[0042] First, the differential rotation between the first main shaft 4 and the second main shaft 5 is realized by two bearings 19, and the differential rotation of the first main shaft 4 relative to the inner wall of the bearing box 8 is realized by two bearings 2 10, which ensures the stable differential rotation of the screen basket 2 and the scraper 3 during operation. This stable differential rotation is crucial for the centrifuge to accurately complete the dehydration and unloading of materials, and can effectively improve the working efficiency and reliability of the equipment, ensuring that the equipment can operate stably when processing different materials or under different working conditions. Secondly, the design of two oil seals 11 sealing the lubrication chamber 13 and two oil seals 2 12 sealing the lubrication chamber 2 14 effectively prevents the leakage of lubricating oil. This not only ensures the sufficient supply of lubricating oil in the lubrication system, so that each component that needs lubrication can be well lubricated, reduce wear and extend the service life of the equipment, but also avoids the pollution and damage that the leakage of lubricating oil may cause to other parts of the material or equipment, ensuring the cleanliness and normal operation of the equipment. Finally, the design of the lubrication system realizes the recycling of lubricating oil. The oil pump 18 draws lubricating oil from the oil tank 17, passes through a series of paths such as the oil pipe 19, the rotary joint 20, and the spindle through hole, and after effectively lubricating each lubricating part, the lubricating oil can smoothly return to the oil tank 17. This circulating lubrication method can continuously provide stable lubrication for the equipment, reduce the waste of lubricating oil, reduce the maintenance cost of the equipment, and also ensure the lubrication effect of the equipment during long-term operation, and improve the overall performance and stability of the equipment.

[0043] Furthermore, the sieve basket 2 includes a support plate 201, a plurality of sieve plates 202 and a sealing strip 203. The support plate 201 is coaxially arranged at the end of the first main shaft 4. The sieve plate 202 is swingably arranged on the support plate 201. The plurality of sieve plates 202 are evenly distributed circumferentially along the support plate 201. After the plurality of sieve plates 202 gather together toward the middle, they are used to form a sealed centrifugal space. After the plurality of sieve plates 202 open together toward the outside, they are used to stay away from the scraper 3. The sealing strip 203 is arranged on the side of the sieve plate 202, and is used to abut against the sealing strip 203 on the side of the adjacent sieve plate 202.

[0044] In this embodiment, when the centrifuge is operating normally and performing centrifugal operation, the support plate 201 of the screen basket 2 is coaxially installed at the end of the first main shaft 4, and rotates with the rotation of the first main shaft 4. A plurality of screen plates 202 are swingably set on the support plate 201, and these screen plates 202 are evenly distributed along the circumference of the support plate 201. During the centrifugation process, the plurality of screen plates 202 gather together toward the middle, and they are tightly combined together to form a sealed centrifugal space. At this time, the sealing strip 203 on the side of the screen plate 202 abuts against the sealing strip 203 on the side of the adjacent screen plate 202, ensuring the sealing of this centrifugal space, so that the material will not leak from the gap between the screen plates 202 during the centrifugation process, and can be subjected to the centrifugal force in this stable space to achieve solid-liquid separation.

[0045] When the equipment fails, such as the discharge port is blocked or other abnormal conditions occur, if the blockage occurs, the motor is turned off to deal with it. Due to the inertia of the motor rotation, the scraper 3 and the screen basket 2 will continue to discharge materials for a certain period of time, thereby aggravating the blockage; while in this solution, when a blockage occurs, multiple screen plates 202 will open outward together, and they will instantly move away from the scraper 3. In this process, the scraper 3 can no longer contact the solid material on the inner wall of the screen plate 202. Since the screen plate 202 is deployed quickly, even if the motor continues to rotate for a short period of time due to inertia, the scraper 3 will not continue to scrape the material on the inner wall of the screen plate 202, thereby avoiding the situation where the material continues to discharge due to the inertia of the motor and aggravates the blockage.

[0046] During normal centrifugal operation, multiple sieve plates 202 gather together and abut against the sealing strips 203 on the sides of adjacent sieve plates 202 through the side sealing strips 203, thereby ensuring the sealing of the centrifugal space, effectively preventing material leakage, and ensuring the effect of centrifugal separation.

[0047] Furthermore, the inner wall of the shell 1 has a separator ring 38, and the separator ring 38 divides the interior of the shell 1 into a discharge chamber 22 and a liquid discharge chamber 23. The discharge chamber 22 has a discharge port 24, and the liquid discharge chamber 23 has a liquid discharge port 25. The end of the sieve basket 2 is located in the discharge chamber 22.

[0048] In this embodiment, when the centrifuge is working, the material is fed into the screen basket 2. As the screen basket 2 rotates at high speed, the material is tightly attached to the inner wall of the screen basket 2 under the action of strong centrifugal force. At this time, due to the influence of centrifugal force, water and some fine particles will pass through the screen gap of the screen basket 2 and be thrown out of the screen basket 2. The inner wall of the shell 1 is provided with a separator ring 38, which divides the inside of the shell 1 into a discharge chamber 22 and a drainage chamber 23. The water and fine particles thrown out of the screen basket 2 enter the drainage chamber 23, and then are smoothly discharged out of the machine through the drainage port 25 on the inner wall of the drainage chamber 23.

[0049] At the same time, the scraper 3 rotates continuously with a speed difference with the screen basket 2, and the scraper 3 stirs the material in the screen basket 2 so that the material can be dehydrated more evenly. The material after being stirred and dehydrated by the scraper 3 continues to be dehydrated while moving toward the large diameter end of the screen basket 2 under the combined effect of the spiral conveying force generated by the spiral blades on the outer wall of the scraper 3 and the inclination angle of the screen basket 2 itself. When the material moves to the end of the screen basket 2, since the end of the screen basket 2 is located in the discharge cavity 22, the material will fall into the discharge cavity 22, and finally be discharged out of the machine through the discharge port 24 on the inner wall of the discharge cavity 22.

[0050] Furthermore, it also includes a rotating rail 26, a slider 27 and a stabilizing roller 28. The rotating rail 26 is arranged at the free end of the sieve plate 202. When a plurality of the sieve plates 202 are gathered together, the plurality of rotating rails 26 form a complete annular track. The slider 27 is slidably arranged on the separation ring 38. The stabilizing roller 28 is rotatably arranged on the slider 27. There are a plurality of sliders 27 and a plurality of stabilizing rollers 28. The rotating rail 26 is provided with an extrusion surface 29 and an opening surface 30. After the slider 27 slides, the stabilizing roller 28 abuts against the extrusion surface 29 or the opening surface 30. The stabilizing roller 28 abuts against the extrusion surface 29 to provide a force for bringing the multiple sieve plates 202 together, and the stabilizing roller 28 abuts against the opening surface 30 to provide a force for opening the multiple sieve plates 202.

[0051] In this embodiment, when the centrifuge is working normally and performing centrifugal operation, the rotating rails 26 set at the free ends of the multiple sieve plates 202 form a complete circular track when the sieve plates 202 are gathered together. Multiple sliders 27 slide toward the center together under the action of corresponding driving devices (such as hydraulic devices or electric push rods, etc.), driving the stabilizing roller 28 to move toward the center. The stabilizing roller 28 abuts against the extrusion surface 29 of the rotating rail 26. The extrusion surface 29 is subjected to the pressure of the stabilizing roller 28, which prompts the multiple sieve plates 202 to further gather toward the center and buckle, thereby forming a complete sieve basket 2 structure. During the high-speed rotation of the sieve basket 2, the stabilizing roller 28 will roll on the extrusion surface 29. This rolling contact method not only ensures that the sieve plate 202 can maintain the buckled state, but also adapts to the rotational movement of the sieve basket 2, so that the entire sieve basket 2 structure can operate stably.

[0052] When the equipment encounters abnormal conditions such as blockage and the sieve plate 202 needs to be quickly unfolded, the driving device drives multiple sliders 27 to slide outward together. As the slider 27 slides outward, the stabilizing roller 28 moves outward accordingly. When the stabilizing roller 28 contacts the opening surface 30 of the rotating rail 26, the opening surface 30 is acted upon by the stabilizing roller 28, pushing the sieve plate 202 outward, thereby realizing the rapid unfolding of multiple sieve plates 202. Even when the sieve basket 2 is still rotating due to the inertia of the motor, the stabilizing roller 28 rolls on the opening surface 30, which can effectively ensure that the sieve plate 202 will not collide or interfere with other parts of the equipment (such as the housing 1, etc.) during the unfolding process, thereby ensuring the safety and stability of the equipment in emergency situations.

[0053] First, the reliable switching of the screen plate 202 between the gathering and unfolding states is achieved through the cooperation of the slider 27 and the stabilizing roller 28 with the extrusion surface 29 and the opening surface 30 on the rotating rail 26. Secondly, during the unfolding process of the screen plate 202, even if there is rotational inertia of the equipment, the rolling design of the stabilizing roller 28 on the opening surface 30 ensures the smoothness of the unfolding action of the screen plate 202 and avoids interference between the screen plate 202 and other components. Finally, this ingenious structural design optimizes the working mode of the screen basket 2, and can better ensure the realization of the separation, discharge and other functions of the equipment, whether it is normal operation or abnormal processing.

[0054] Furthermore, it also includes an adjustment ring 31 and a limit column 32. The adjustment ring 31 is rotatably arranged in the shell 1. The adjustment ring 31 has a plurality of curved grooves 33. The limit column 32 is arranged on the slider 27. The limit column 32 is located in the curved groove 33. The adjustment ring 31 has a lever 34, and the lever 34 protrudes out of the shell 1.

[0055] In this embodiment, during normal operation of the centrifuge, the adjusting ring 31 is in a non-rotatable state inside the housing 1, and the limiting posts 32 provided on the slider 27 are placed in the multiple curved slide grooves 33 provided thereon. At this time, the lever 34 is clamped on the housing 1 by means of a fixing pin or the like to prevent accidental contact and ensure normal and stable operation of the equipment.

[0056] When the equipment is blocked, the operator can release the clamping state of the lever 34 (such as pulling out the fixing pin, etc.), and then directly move the lever 34 to drive the adjusting ring 31 to rotate an angle in the housing 1. As the adjusting ring 31 rotates, the shape of the curved chute 33 will cause the limiting column 32 to produce radial displacement in the chute. Since the limiting column 32 is set on the slider 27, the radial displacement of the limiting column 32 will drive the slider 27 to move accordingly, and then drive the slider 27 to slide outward, and finally realize that the stabilizing roller 28 abuts against the support surface 30 to push the screen plate 202 to expand quickly, so as to effectively deal with the blockage problem.

[0057] Furthermore, it also includes a distribution pipe 35 and a feed pipe 36, the distribution pipe 35 is coaxially arranged at the end of the second main shaft 5, the outer wall of the distribution pipe 35 has a plurality of strip discharge holes 37, the screen basket 2 and the distribution pipe 35 are both conical and have the same taper, and the feed pipe 36 is detachably arranged on the shell 1, and is used to extend into the distribution pipe 35 and transport materials into the distribution pipe 35.

[0058] In this embodiment, in the preparation stage of the centrifuge, the feed pipe 36 is detachably mounted on the housing 1, and its end extends into the distribution pipe 35 located at the end of the second main shaft 5. When the device is started, the distribution pipe 35 starts to rotate at a high speed driven by the second main shaft 5. At this time, the material is transported to the distribution pipe 35 through the feed pipe 36. Since the outer circle of the distribution pipe 35 is provided with a plurality of strip-shaped discharge holes 37, and the distribution pipe 35 is in a high-speed rotating state, the material is thrown out through these strip-shaped discharge holes 37 under the action of centrifugal force.

[0059] Because the material distribution pipe 35 and the screen basket 2 are both designed to be conical and have the same taper, after the material is thrown out from the strip-shaped discharge hole 37 of the material distribution pipe 35, it will move in the direction that matches the taper of the screen basket 2. This design ensures that the material can be more evenly distributed on the screen basket 2. Under the combined effect of centrifugal force and the conical structure of the material distribution pipe 35 and the screen basket 2, the material can naturally spread along the conical surface of the screen basket 2 after being thrown out from the material distribution pipe 35, avoiding the accumulation of materials in certain parts of the screen basket 2, thereby providing good material distribution conditions for subsequent processing processes such as centrifugal dehydration.

[0060] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. Parameter-adjustable horizontal scraper discharge centrifuge based on permanent magnet dual motor drive, characterized in that: The invention comprises a housing (1), a screen basket (2), a scraper (3), a first main shaft (4), a second main shaft (5), a first rotating driving member (6) and a second rotating driving member (7), wherein the first main shaft (4) and the second main shaft (5) are both rotatably arranged in the housing (1), the first main shaft (4) is a hollow shaft, the first main shaft (4) is sleeved outside the second main shaft (5), the screen basket (2) is arranged on the first main shaft (4), the scraper (3) is arranged on the second main shaft (5), the scraper (3) is located in the screen basket (2) and is used to scrape off the material attached to the inner wall of the screen basket (2) for spiral unloading, the first rotating driving member (6) and the second rotating driving member (7) are both arranged in the housing (1), the first main shaft (4) is drivingly connected to the first rotating driving member (6), and the second main shaft (5) is drivingly connected to the second rotating driving member (7).

2. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 1 is characterized in that: The invention also comprises a bearing box (8), a first bearing (9) and a second bearing (10); the bearing box (8) is bolted to the rear of the housing (1); the first main shaft (4) and the second main shaft (5) both pass through the bearing box (8); the first bearing (9) is arranged between the first main shaft (4) and the second main shaft (5); the second bearing (10) is arranged between the inner wall of the bearing box (8) and the first main shaft (4); and two bearings are provided for each of the first bearing (9) and the second bearing (10).

3. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 2 is characterized in that: It also includes an oil seal 1 (11) and an oil seal 2 (12), wherein the oil seal 1 (11) is arranged between the first main shaft (4) and the second main shaft (5), and the oil seal 2 (12) is arranged between the bearing box (8) and the first main shaft (4). A lubrication chamber 1 (13) is formed between the first main shaft (4) and the second main shaft (5), and a lubrication chamber 2 (14) is formed between the bearing box (8) and the first main shaft (4). Two of the oil seal one (11) and two of the oil seal two (12) are provided. The two oil seals one (11) are used to seal the lubrication chamber one (13), and the two oil seals two (12) are used to seal the lubrication chamber two (14).

4. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 3 is characterized in that: The first main shaft (4) has a through hole 1 (15) for connecting the lubricating chamber 1 (13) and the lubricating chamber 2 (14); the second main shaft (5) is a hollow shaft; the second main shaft (5) has a through hole 2 (16) for connecting the lubricating chamber 1 (13) and the interior of the second main shaft (5); and the second main shaft (5) further comprises a lubricating system for supplying lubricating oil to the interior of the second main shaft (5), the lubricating chamber 1 (13) and the interior of the lubricating chamber 2 (14).

5. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 4 is characterized in that: The lubrication system comprises an oil tank (17), an oil pump (18) and an oil pipe (19); the oil tank (17) is arranged at the rear of the housing (1) and at the bottom of the bearing box (8) for storing lubricating oil; the oil pump (18) is arranged in the oil tank (17); one end of the oil pipe (19) is connected to the oil pump (18) and the other end is connected to the end of the second main shaft (5) by means of a rotary joint (20); the bottom of the bearing box (8) is provided with an oil return port (21), and the oil return port (21) is connected to the oil tank (17).

6. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 1 is characterized in that: The sieve basket (2) comprises a support plate (201), a plurality of sieve plates (202) and a sealing strip (203); the support plate (201) is coaxially arranged at the end of the first main shaft (4); the sieve plate (202) is swingably arranged on the support plate (201); the plurality of sieve plates (202) are evenly distributed along the circumference of the support plate (201); the plurality of sieve plates (202) are used to form a sealed centrifugal space after being gathered together toward the middle; and the plurality of sieve plates (202) are used to be away from the scraper (3) after being opened together toward the outside; and the sealing strip (203) is arranged on the side of the sieve plate (202) and is used to abut against the sealing strip (203) on the side of the adjacent sieve plate (202).

7. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 6 is characterized in that: The inner wall of the shell (1) is provided with a dividing ring (38), the dividing ring (38) dividing the interior of the shell (1) into a discharge chamber (22) and a liquid discharge chamber (23), the discharge chamber (22) having a discharge port (24), the liquid discharge chamber (23) having a liquid discharge port (25), and the end of the sieve basket (2) being located in the discharge chamber (22).

8. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 7 is characterized in that: It also comprises a rotating rail (26), a slider (27) and a stabilizing roller (28), wherein the rotating rail (26) is arranged at the free end of the sieve plate (202), and when a plurality of the sieve plates (202) are gathered together, the plurality of rotating rails (26) form a complete annular track, the slider (27) is slidably arranged on the separation ring (38), and the stabilizing roller (28) is rotatably arranged on the slider (27), and the slider (27) and the stabilizing roller (28) are both plural. The rotating rail (26) is provided with an extrusion surface (29) and an expansion surface (30). After the sliding block (27) slides, the stabilizing roller (28) abuts against the extrusion surface (29) or the expansion surface (30). The stabilizing roller (28) abuts against the extrusion surface (29) to provide a force for bringing the plurality of sieve plates (202) together, and the stabilizing roller (28) abuts against the expansion surface (30) to provide a force for opening the plurality of sieve plates (202).

9. The parameter-adjustable horizontal scraper unloading centrifuge based on permanent magnet dual motor drive according to claim 8, characterized in that: It also comprises an adjusting ring (31) and a limiting column (32), wherein the adjusting ring (31) is rotatably arranged in the housing (1), the adjusting ring (31) has a plurality of curved sliding grooves (33), the limiting column (32) is arranged on the slider (27), the limiting column (32) is located in the curved sliding groove (33), and the adjusting ring (31) has a shifting rod (34), and the shifting rod (34) protrudes out of the housing (1).

10. The parameter-adjustable horizontal scraper discharge centrifuge based on permanent magnet dual motor drive according to claim 9, characterized in that: It also includes a distribution pipe (35) and a feed pipe (36), wherein the distribution pipe (35) is coaxially arranged at the end of the second main shaft (5), and the outer wall of the distribution pipe (35) has a plurality of strip-shaped discharge holes (37). The screen basket (2) and the distribution pipe (35) are both conical and have the same taper. The feed pipe (36) is detachably arranged on the shell (1) and is used to extend into the distribution pipe (35) and transport materials into the distribution pipe (35).

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