CN110140531B - Double-inlet cyclone cleaning device and rice-regenerating combine harvester - Google Patents
Double-inlet cyclone cleaning device and rice-regenerating combine harvester Download PDFInfo
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- CN110140531B CN110140531B CN201910466573.6A CN201910466573A CN110140531B CN 110140531 B CN110140531 B CN 110140531B CN 201910466573 A CN201910466573 A CN 201910466573A CN 110140531 B CN110140531 B CN 110140531B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 11
- 235000013339 cereals Nutrition 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 35
- 239000012535 impurity Substances 0.000 claims description 30
- 241000209094 Oryza Species 0.000 claims description 28
- 235000007164 Oryza sativa Nutrition 0.000 claims description 28
- 235000009566 rice Nutrition 0.000 claims description 28
- 238000007599 discharging Methods 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 241000251169 Alopias vulpinus Species 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 13
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 8
- 230000001174 ascending effect Effects 0.000 description 6
- 238000005247 gettering Methods 0.000 description 6
- 238000003306 harvesting Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009418 agronomic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009336 multiple cropping Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/12—Details of combines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/44—Grain cleaners; Grain separators
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F12/00—Parts or details of threshing apparatus
- A01F12/48—Air conduits or blowers for grain
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Cyclones (AREA)
- Threshing Machine Elements (AREA)
Abstract
The invention provides a double-inlet cyclone cleaning device and a rice-regenerating combine harvester, which comprise a separating cylinder, wherein two inlets are arranged on a cylinder body of the separating cylinder, and are respectively connected with a thresher through inlet pipelines extending along the radial direction of the cylinder body or connected with the thresher after crossing through inlet pipelines extending along the radial direction of the cylinder body, so that a vortex flow field which is symmetrically distributed in the separating cylinder is generated. The invention can fully utilize the characteristics of the rice plant, such as light residue and short stalks, and adopts the air flow cleaning method to ensure the cleaning effect, simplify the structure of the harvester and reduce the weight of the whole harvester.
Description
Technical Field
The invention relates to the technical field of agricultural equipment, in particular to a double-inlet cyclone cleaning device and a rice combine harvester.
Background
The rice is a kind of rice variety which is cultivated by utilizing dormant buds surviving on harvested rice piles, so that the rice variety is heading for maturing again, and compared with the traditional rice, the rice variety has a plurality of advantages, in recent years, the single yield of the rice reaches the bottleneck, and the rice variety can be planted to effectively improve the multiple cropping index and the rice yield. However, when harvesting first-season rice, the harvester is inevitable to roll the rice piles after harvesting, and in order to ensure that the rice piles after rolling can be reaped in the second season, loss is avoided, and the light weight is required to be used as an important design requirement of the regenerative rice harvester.
The cleaning device is an important component of the rice and wheat combine harvester, and the performance of the cleaning device directly influences the operation effect of the whole harvester. A large number of research results and practice tables prove that the air screen type cleaning device has high stability and strong adaptability, is a cleaning device widely used at present, but has complex structure, large volume and high requirements on power and space, and cannot meet the light-weight requirement on a rice harvester.
The first season harvesting of the ratoon rice has the agronomic requirement of high stubble, namely, the length of about 40cm below the rice spike is only harvested, compared with the harvesting of traditional rice, the grain content in the ratoon rice extract is extremely large and can reach about 80%, and the rest is the combination of light trash and short stalks, so that under the proper feeding quantity, the harvesting of ratoon rice is more suitable for using a cyclone separation cleaning device compared with the harvesting of traditional rice.
The cyclone separating device is gradually applied to a small harvester at present, but has unreasonable design, the upper end of the cyclone separating barrel is connected with a impurity sucking fan, the inlet is positioned in a cylindrical section of the barrel body and extends into the barrel in a tangential direction, the inlet is connected with the thresher through a grain raising pipeline, and spiral descending airflow along the barrel wall and spiral ascending airflow positioned in the central axis of the barrel are generated in the cyclone separating barrel under the combined action of the impurity sucking fan and the thresher. The grain is thrown into the cleaning cylinder by the thresher, the grain with large mass is rotated and slid downwards along the cylinder wall, falls into the granary from the grain outlet, and the lighter impurities are sucked away and discharged by the high-speed air flow generated by the suction fan. The flow field in the conventional cyclone separating cylinder is also asymmetric, and the spiral ascending air flow has certain eccentricity, which necessarily has certain influence on the cleaning effect of the cleaning device, for example, the high-speed air flow winds up grains on the cylinder wall to cause loss, or the stalks are suspended and accumulated at the grain outlet below and fall down to reduce the cleaning rate.
In addition, the traditional cyclone separating cylinder has poor cleaning effect on the large-feeding-amount educts, on one hand, in the cyclone separating cylinder, in order to ensure that light impurities can be effectively sucked out by ascending air flow, the central vortex flow needs to be ensured to reach the highest floating speed of the impurities, and the smaller the diameter of the cyclone separating cylinder is, the better the flow field characteristic in the cyclone separating cylinder is, the higher the wind speed of the central vortex is, and the cleaning device can not meet the working requirements because of the limit of the size of the cylinder body and the inlet; on the other hand, the most direct method of the traditional cyclone cleaning device for treating the large-feeding-amount separated matters is to increase the diameter of the cylinder body and the size of the inlet, the method can effectively solve the problem of blockage caused by large feeding amount, but simultaneously reduce the wind speed of vortex flow in the center of the cylinder body, so that stalks with higher suspension speed fall from a grain outlet below, the cleaning rate of the cleaning device is reduced, and if a impurity-absorbing fan with higher power is selected for ensuring the wind speed of the vortex flow in the center on the basis of increasing the diameter of the cylinder body, the weight of the whole cleaning mechanism is increased, and meanwhile, the power of the combine harvester is more burdened, so that the advantages of the cyclone cleaning device are lost.
In order to solve the problems, a symmetrical double-inlet cut-in cyclone separation barrel is used in agriculture at the present stage, but an inlet pipeline of the structure is directly cut into a barrel, the transition is lacking, grains which are thrown into by a thresher are dispersed on the whole radius length of the cyclone separation barrel, the ascending vortex at the center of the barrel is large, and material grains which are close to the central axis of the barrel are easily discharged from a gettering port along with ascending airflow, so that the cleaning loss rate is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the double-inlet cyclone cleaning device and the rice-regenerating combine harvester, and the symmetrical distribution of double inlets is adopted to avoid the asymmetrical flow of air flow in the traditional cyclone cleaning device, so that the cleaning effect is improved.
The present invention achieves the above technical object by the following means.
The utility model provides a double-inlet cyclone cleaning device, includes the separating drum, be equipped with two inlets on the barrel of separating drum, two the entry is connected with the winnower through the inlet pipeline that extends along the barrel is radial respectively for make the vortex flow field that produces symmetrical distribution in the separating drum.
Further, the inlet pipeline is a pipeline formed by a spiral volute-shaped side wall extending along the radial direction of the cylinder body and the wall surface of the cylinder body; the barrel of the separating barrel is symmetrically provided with two inlets, and inlet pipelines are symmetrically arranged on the barrels of the two inlets.
The utility model provides a two entry whirlwind cleaning device, includes the separating drum, be equipped with two inlets on the barrel of separating drum, two the entry is connected with the winnower after crossing through the entry pipeline that extends along barrel radial for make the vortex flow field that produces symmetrical distribution in the separating drum.
Further, the inlet pipeline is a pipeline formed by a spiral volute-shaped side wall extending along the radial direction of the barrel and the wall surface of the barrel, and is a double-layer pipeline; the barrel of the separating barrel is symmetrically provided with two inlets, the inlet on one barrel is communicated with the outlet of one layer of inlet pipeline, the inlet on the other barrel is communicated with the outlet of the other layer of inlet pipeline, and the inlets of the two layers of inlet pipelines are combined and intersected and then are connected with the winnower.
Further, the inlet duct width tapers in the material flow direction.
Further, a guide strip is arranged in the grain outlet of the separating cylinder.
Further, the guide strip is a spiral guide strip with the spiral direction being the same as the downward swirling airflow in the cylinder.
Further, the helix angle of the guide strip is 20 DEG to 30 DEG, and the width of the guide strip is 20mm to 30mm.
Further, a plurality of vent holes are uniformly distributed near the grain outlet of the separating cylinder; the inner surface of the separating cylinder can be attached with a wear-resistant lining.
Further, the minimum diameter of the impurity discharging port of the separating cylinder is as follows:
wherein: d, d 1 The diameter of the impurity discharging port is the minimum diameter, m;
v 1 the maximum suspension speed of the short stalks input into the separating cylinder is m/s;
V 0 to clean the minimum air quantity, m 3 /s。
Further, the diameter of the grain outlet of the separating cylinder is as follows:
wherein: d, d 2 The diameter of the grain outlet is m;
v 2 for the minimum suspension speed of the rice seeds, m/s.
Further, the inlet pipeline is connected with the winnower through a winnower Gu Guandao, and a section of the winnower Gu Guandao connected with the inlet pipeline is an arc-shaped pipe and is used for reducing resistance to materials and air flowing into the separating cylinder; the cross-sectional area of the said lifter Gu Guandao gradually decreases along the flow direction.
A combination harvester for rice is provided with the double-inlet cyclone cleaning device.
The invention has the beneficial effects that:
1. the double-inlet cyclone cleaning device and the rice-regenerating combine harvester can fully utilize the characteristics of the rice-regenerating extract, mainly including light impurities and short stalks, and adopt the airflow cleaning method to ensure the cleaning effect, simplify the structure of the harvester and reduce the weight of the whole harvester.
2. According to the double-inlet cyclone cleaning device and the rice-recycling combine harvester, the double inlets which are symmetrically distributed are adopted, so that the asymmetric flow of air flow in the traditional cyclone cleaning device is avoided, and the cleaning effect is improved.
3. According to the double-inlet cyclone cleaning device and the rice-regenerating combine harvester, the working requirements under different feeding conditions can be met rapidly by adjusting the air quantity adjusting valve.
4. The double-inlet cyclone cleaning device and the rice-regenerating combine harvester have the advantages that the diameters of the impurity discharging port and the grain outlet of the separating cylinder are determined by the air quantity required by cleaning and the suspension coefficient of each component of materials, and the double-inlet cyclone cleaning device and the rice-regenerating combine harvester have clear design basis and are more in line with the characteristics of rice-regenerating extracts.
5. According to the double-inlet cyclone cleaning device and the rice-husking combine harvester, the guide strip with the spiral direction identical to the downward swirling airflow direction in the drum is arranged on the drum wall at the lower side of the separating drum, so that the problem that stalks are accumulated in the drum can be well solved, and the cleaning rate is improved.
6. According to the double-inlet cyclone cleaning device and the rice-grain combine harvester, the lower cone section of the separating cylinder is provided with the air holes in a layered distribution along the axial direction, so that the accumulation of stalks at the grain outlet is avoided, and the stalks are more easily sucked by the rising spiral airflow to improve the cleaning rate.
7. According to the double-inlet cyclone cleaning device and the rice-grain combine harvester, the wear-resistant lining is attached to the inner surface of the separating cylinder, so that on one hand, resistance of the cylinder wall to air flow and material flow can be reduced, on the other hand, the inner wall can be prevented from being worn, and the service life of the device is prolonged.
8. According to the double-inlet cyclone cleaning device and the rice-grain combine harvester, the protruded cylinder wall of the inlet pipeline of the separating cylinder can ensure that the separated matters are kept away from the central axis of the cylinder as far as possible when entering the separating cylinder, so that the possibility that grains are sucked by the central vortex is reduced, and the loss rate is reduced.
9. According to the double-inlet cyclone cleaning device and the rice-recycling combine harvester, the widths of the two inlet pipelines are gradually reduced along the material flow direction, so that the material flow has an acceleration process before entering the separating cylinder, and grains are closer to the cylinder wall under the action of centrifugal force, so that the loss rate is reduced.
10. According to the double-inlet cyclone cleaning device and the rice-grain-raising combine harvester, a section of the grain-raising pipeline close to the inlet pipeline of the separating cylinder is in an arc shape which is smoothly transited to the horizontal direction, so that the resistance of materials and air flow in the process of flowing into the separating cylinder is reduced.
11. According to the double-inlet cyclone cleaning device and the rice-grain-raising combine harvester, the cross section area of the grain-raising pipeline is uniformly reduced along the material flow direction, so that the local resistance loss of the gas flow can be reduced.
Drawings
Fig. 1 is a structural view of a double inlet cyclone separator according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a separation barrel according to embodiment 1 of the present invention.
Fig. 3 is a front view of fig. 2.
Fig. 4 is a cross-sectional view of fig. 3.
Fig. 5 is a structural view of a double inlet cyclone separator according to embodiment 2 of the present invention.
Fig. 6 is a schematic structural view of a separation barrel according to embodiment 2 of the present invention.
Fig. 7 is a front view of fig. 6.
Fig. 8 is a cross-sectional view of fig. 7.
In the figure:
1-a gettering fan; 2-an induced draft pipeline; 3-separating cylinder; 4-Yang Gu Guandao; 5-a thresher; 6-a grain conveying auger; 21-an air quantity regulating valve; 31-a impurity discharging port; 32-inlet piping; 33-sidewalls; 34-a guide bar; 35-vent holes; 36-grain outlet.
Detailed Description
The invention will be further described with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.
As shown in fig. 1, the dual-inlet cyclone separator according to embodiment 1 of the present invention includes a gettering fan 1, a separating drum 3, a thresher 5 and a grain conveying auger 6, wherein the grain conveying auger 6 is used for conveying threshed materials from a receiving box to the thresher 5, a trash outlet 31 at the upper end of the separating drum 3 is connected with the gettering fan 1 through an air suction pipeline 2, two inlet pipelines 32 which are radially extended and symmetrically distributed on the separating drum 3 on a cylindrical section, each inlet pipeline 32 is connected with the thresher 5 through a grain lifting pipeline 4, the thresher 5 and the grain conveying auger 6 are coaxially installed, and the two grain conveying augers 6 can be respectively installed in two receiving boxes or can be installed in the same receiving box in parallel. The impurity-sucking fan 1 adopts an inhalation type general centrifugal fan, and the air suction section has uniform air speed so as to ensure good effect of sucking away light impurities; the suction pipeline 2 connects the impurity-sucking fan 1 with the separating cylinder 3 so as to adapt to the installation requirement of the combine harvester; the air suction pipeline 2 is provided with an air quantity regulating valve 21, the air quantity regulating valve 21 is a round single-leaf air quantity regulating valve, the structure is simple, the control is convenient, and light impurities are not easy to be blocked from being sucked away by the impurity suction fan 1; the section of the grain lifting pipeline 4 close to the inlet pipeline of the separating cylinder 3 is in an arc shape so as to ensure that the material which is separated out can smoothly transition to the horizontal direction after being thrown upwards by the grain lifting device, so that the material enters the cylinder along the tangential direction of the cylinder, the cross section area of the grain lifting pipeline is uniformly reduced along the material flow direction, and the resistance of the material and air flow in the process of flowing into the separating cylinder 3 is reduced; the thresher 5 adopts a thresher with a thresher wheel web, and a winnowing Gu Shepian and an air supply blade are simultaneously arranged on the winnowing wheel web, so that the cleaning effect of materials with large feeding quantity is optimized by improving the air inflow of the separating drum 3.
As shown in fig. 2, the upper and lower sections of the separating cylinder 3 are conical structures, the middle section is a cylindrical structure, the upper section of the separating cylinder 3 is provided with a impurity discharging port 31, the lower section of the separating cylinder 3 is provided with a grain outlet 36, and the grain outlet 36 or the impurity discharging port 31 is connected to the cylindrical middle section structure in a tapered manner. The inlet pipeline 32 is a pipeline formed by a spiral volute-shaped side wall 33 extending along the radial direction of the barrel and the wall surface of the barrel; the cylinder body of the separating cylinder 3 is symmetrically provided with two inlets, and the inlet pipelines 32 are symmetrically arranged on the cylinder bodies of the two inlets. As shown in fig. 4, a side wall 33 remote from the axis of the cylinder projects beyond the wall of the cylindrical section, this side wall 33 being in the shape of a spiral volute, the two side walls 33 cooperating with each other to form the two inlet ducts 32 of the separating cylinder 3. The diameter of the impurity discharging port 31 and the diameter of the grain outlet 36 of the separating cylinder 3 are determined by the air quantity and the material suspension speed required by cleaning.
The minimum diameter of the impurity discharging port 31 of the separating cylinder 3 is as follows:
wherein: d, d 1 The minimum diameter of the impurity discharging port 31, m;
v 1 the maximum suspension speed of the short stalks input into the separating drum 3 is m/s;
V 0 to clean the minimum air quantity, m 3 /s。
The grain outlet 36 of the separating cylinder (3) has the diameter of:
wherein: d, d 2 The diameter of the grain outlet 36, m;
v 2 for the minimum suspension speed of the rice seeds, m/s.
As shown in fig. 3, the wall of the lower side of the inlet pipeline of the separating cylinder 3 is provided with a guide strip 34 with a spiral angle of 20-30 degrees and a width of 20-30 mm, and the spiral direction is the same as the flow direction of the downwind in the cylinder. During operation, seeds can move to the position of the grain outlet 36 below along the guide strip 34 and the downward swirling air flow, and meanwhile, the guide strip 34 can prevent the stems in the extracted matters from approaching the cylinder wall, and guide the stems to the upward swirling flow at the central axis, so that the stems are sucked out by the air flow, and the problem that the stems are accumulated in the cylinder is well solved; the lower cone section of the separating cylinder 3 is also provided with ventilation holes 35 which are distributed in a layered manner along the axial direction, and the generated air cushion effect avoids the accumulation of the stalks at the grain outlet 36, so that the stalks are more easily sucked away by the ascending spiral airflow.
As shown in fig. 4, the two side walls 33 are spiral volute-shaped and symmetrically distributed, and the two side walls 33 and the cylinder wall cooperate with each other to form two inlet pipes 32 with widths gradually reduced along the material flow direction of the separating cylinder 3. The advantage of design like this makes the width change of two entry pipelines even, reduces the resistance, guarantees the smooth passage of material flow and air current to make the material be hugged closely the drum inner wall and keep away from the axis at rotatory in-process that gets into by the bigger seed grain of centrifugal force, avoid being absorbed by the vortex that rises.
The working process comprises the following steps:
after the threshed materials fall into the receiving box, the threshed materials are divided into two parts by two grain conveying augers 6 which are arranged in parallel at the bottom of the receiving box and are respectively transported to a thresher 5 which is coaxially arranged, so that the load of a Shan Yanggu machine is reduced; the thresher 5 throws the material into the separating drum 3 along the cereal winnowing pipeline 4 by the rotation of the winnowing Gu Shepian on the one hand, and inputs the air flow into the separating drum 3 along the cereal winnowing pipeline 4 by the rotation of the air supply blades on the other hand; the two air flows and the material flow enter the cylinder after rotating 90 degrees around the cylinder along the symmetrically distributed inlet pipelines, so that the defect of asymmetry of the air flow of the traditional single-inlet separating cylinder is avoided, the air flow entering the separating cylinder 3 is increased, and the problem that the cyclone separating device has poor material separating effect for large feeding amount is particularly solved; the material flow enters the separating cylinder 3, then the lower swirling flow flowing along the cylinder wall slides down to the grain outlet 36 along the guide strip 34, the stalk and the light impurity are rolled by the upper swirling flow at the central axis of the cylinder and discharged from the impurity discharging port 31, and the flow speed of the upper swirling flow is mainly determined by the impurity sucking fan 1.
As shown in fig. 5, the dual-inlet cyclone separator according to embodiment 2 of the present invention comprises a gettering fan 1, a separating drum 3, a thresher 5 and a grain conveying auger 6, wherein the grain conveying auger 6 is used for conveying threshed materials from a receiving box to the thresher 5, a trash outlet 31 at the upper end of the separating drum 3 is connected with the gettering fan 1 through a suction pipe 2, two inlet pipes 32 which are radially extended and symmetrically distributed by the separating drum 3 on a cylindrical section are connected with the winnower 5 through a winnower pipe 4 after the two inlet pipes 32 are converged, and the winnower 5 and the grain conveying auger 6 are coaxially installed. The impurity-sucking fan 1 adopts an inhalation type general centrifugal fan, and the air suction section has uniform air speed so as to ensure good effect of sucking away light impurities; the air suction pipeline 2 connects the impurity suction fan 1 with the separating cylinder 3 so as to adapt to the installation requirement of the combine harvester; the air volume adjusting mechanism 23 is a circular single-leaf air volume adjusting valve, has a simple structure, is convenient to control, and is not easy to block light impurities from being sucked away by the impurity sucking fan 1.
As shown in fig. 6 and 7, the inlet duct 32 is divided into an inner inlet duct and an outer inlet duct; the inner inlet pipeline is a pipeline formed by a spiral volute-shaped inner side wall 33 extending along the radial direction of the barrel and the barrel wall surface; the outer inlet pipeline is a pipeline formed by an outer side wall 33, an inner side wall 33 and a barrel wall surface in a spiral volute shape extending along the radial direction of the barrel; the barrel of the separating barrel 3 is symmetrically provided with two inlets, the inlet on one barrel is communicated with an inner inlet pipeline, the inlet on the other barrel is communicated with an outer inlet pipeline, and the inner inlet pipeline and the outer inlet pipeline are intersected. As shown in fig. 8, the inner and outer walls of the separation barrel 3 with double inlets on the same side are mutually matched to form two inlet pipelines 32 with the width gradually reduced along the material flow direction, the inner inlet pipeline enters the barrel tangentially along the barrel after surrounding the separation barrel by 90 degrees, and the outer inlet pipeline enters the barrel tangentially along the barrel after surrounding the separation barrel by 270 degrees. The design has the advantages that the width of the two inlet pipelines is changed uniformly, the resistance is reduced, and the smooth passing of material flow and air flow is ensured.
The working process comprises the following steps:
after the threshed materials fall into a receiving box, the threshed materials are transported to a coaxially installed winnower 5 by a grain conveying auger 6 at the bottom of the receiving box; the thresher 5 throws the material into the separating drum 3 along the cereal winnowing pipeline 4 by the rotation of the winnowing Gu Shepian on the one hand, and inputs the air flow into the separating drum 3 along the cereal winnowing pipeline 4 by the rotation of the air supply blades on the other hand; the airflow and the material flow are divided into two parts at the tail end of the grain lifting pipeline 4, one part rotates around the cylinder body for 270 degrees along the outer inlet pipeline and then enters the cylinder, and the other part rotates around the cylinder body for 90 degrees along the inner inlet pipeline and then enters the cylinder, so that two flows enter the cylinder tangentially and symmetrically, the defect of asymmetrical airflow of the traditional single-inlet separating cylinder is avoided, and the cleaning effect is improved; the material flow enters the separating cylinder 3, then the lower swirling flow flowing along the cylinder wall slides down to the grain outlet 36 along the guide strip 34, the stalk and the light impurity are rolled by the upper swirling flow at the central axis of the cylinder and discharged from the impurity discharging port 31, and the flow speed of the upper swirling flow is mainly determined by the impurity sucking fan 1.
The invention relates to a combination harvester for recycled rice, which is provided with a double-inlet cyclone cleaning device.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (2)
1. The double-inlet cyclone cleaning device is characterized by comprising a separating cylinder (3), wherein two inlets are arranged on a cylinder body of the separating cylinder (3), and the two inlets are connected with a winnower (5) after being intersected through an inlet pipeline (32) extending along the radial direction of the cylinder body, so that a vortex flow field which is symmetrically distributed in the separating cylinder (3) is generated;
the inlet pipeline (32) is a pipeline formed by a spiral volute-shaped side wall (33) extending along the radial direction of the barrel and the wall surface of the barrel, and the inlet pipeline (32) is a double-layer pipeline; the barrel of the separating barrel (3) is symmetrically provided with two inlets, the inlet on one barrel is communicated with the outlet of one layer of inlet pipeline, the inlet on the other barrel is communicated with the outlet of the other layer of inlet pipeline, and the inlets of the two layers of inlet pipelines are combined and intersected and then are connected with the winnower (5);
the width of the inlet pipeline (32) is gradually reduced along the material flow direction;
a grain outlet (36) of the separating cylinder (3) is internally provided with a guide strip (34);
the guide strip (34) is a spiral guide strip (34) with the spiral direction being the same as the downward swirling flow direction in the cylinder;
-the helix angle of the guide strip (34) is 20 ° to 30 °, the width of the guide strip (34) being 20mm to 30mm;
a plurality of vent holes (35) are uniformly distributed near a grain outlet (36) of the separating cylinder (3); the inner surface of the separating cylinder (3) can be attached with a wear-resistant lining;
the minimum diameter of the impurity discharging port (31) of the separating cylinder (3) is as follows:
wherein: d, d 1 The diameter of the impurity discharging port (31) is the minimum, m;
v 1 the maximum suspension speed of the short stalks input into the separating drum (3) is m/s;
V 0 to clean the minimum air quantity, m 3 /s；
The diameter of a grain outlet (36) of the separating cylinder (3) is as follows:
wherein: d, d 2 The diameter of the grain outlet (36), m;
v 2 the minimum suspension speed of the rice seeds is m/s;
the inlet pipeline (32) is connected with the winnower (5) through a winnower Gu Guandao (4), and a section of the winnower Gu Guandao (4) connected with the inlet pipeline (32) is an arc-shaped pipe and is used for reducing resistance force applied to materials and air in the process of flowing into the separating drum (3); the cross-sectional area of the said lifter Gu Guandao (4) gradually decreases along the flow direction.
2. A combination harvester for rice, characterized in that the double inlet cyclone cleaning device according to claim 1 is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910466573.6A CN110140531B (en) | 2019-05-31 | 2019-05-31 | Double-inlet cyclone cleaning device and rice-regenerating combine harvester |
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|---|---|---|---|
| CN201910466573.6A CN110140531B (en) | 2019-05-31 | 2019-05-31 | Double-inlet cyclone cleaning device and rice-regenerating combine harvester |
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| CN110140531A CN110140531A (en) | 2019-08-20 |
| CN110140531B true CN110140531B (en) | 2024-03-19 |
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| CA3111847A1 (en) * | 2018-09-07 | 2020-03-12 | Roy BREWIN | Crop dust separation system |
| IT202000000562U1 (en) * | 2020-02-06 | 2021-08-06 | Sigma Ingegneria S R L | EQUIPMENT FOR SUCTION AND COLLECTION OF PROCESSING RESIDUES |
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|---|---|---|---|---|
| SU939134A1 (en) * | 1980-02-22 | 1982-06-30 | За витель | Loose material pneumatic separator |
| CN2511404Y (en) * | 2001-11-14 | 2002-09-18 | 王云山 | Small grain and chaff separator |
| CN102668822A (en) * | 2011-11-15 | 2012-09-19 | 河南科技大学 | Cleaning system and combined grain harvester adopting same |
| CN210247588U (en) * | 2019-05-31 | 2020-04-07 | 江苏大学 | Double-inlet cyclone cleaning device and ratoon rice combine harvester |
-
2019
- 2019-05-31 CN CN201910466573.6A patent/CN110140531B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU939134A1 (en) * | 1980-02-22 | 1982-06-30 | За витель | Loose material pneumatic separator |
| CN2511404Y (en) * | 2001-11-14 | 2002-09-18 | 王云山 | Small grain and chaff separator |
| CN102668822A (en) * | 2011-11-15 | 2012-09-19 | 河南科技大学 | Cleaning system and combined grain harvester adopting same |
| CN210247588U (en) * | 2019-05-31 | 2020-04-07 | 江苏大学 | Double-inlet cyclone cleaning device and ratoon rice combine harvester |
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| CN110140531A (en) | 2019-08-20 |
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