CN112655382A - Air supply system of harvester - Google Patents
Air supply system of harvester Download PDFInfo
- Publication number
- CN112655382A CN112655382A CN202011616074.XA CN202011616074A CN112655382A CN 112655382 A CN112655382 A CN 112655382A CN 202011616074 A CN202011616074 A CN 202011616074A CN 112655382 A CN112655382 A CN 112655382A
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- fan
- air
- air outlet
- harvester
- air supply
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- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 241000886569 Cyprogenia stegaria Species 0.000 claims description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 230000007306 turnover Effects 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 15
- 238000004140 cleaning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241000883990 Flabellum Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241000251169 Alopias vulpinus Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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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
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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
- A01F12/48—Air conduits or blowers for grain
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an air supply system of a harvester, which comprises a fan, an air supply channel, a tail cover and a flow blocking piece. In vertical direction, the height that highly is higher than the air outlet of discharge port, the air outlet sets up towards the discharge port slope, fan casing, seed grain drain pan, miscellaneous surplus drain pan and reel incline and increase the setting gradually from air outlet one side towards the discharge port, first air intake with external intercommunication is seted up respectively at the both ends of fan casing, set up the second air intake along its circumference on the lateral wall relative with the air outlet in the middle of the fan casing, supply air through evenly distributed's three air intakes on the fan casing for the even stability of air capacity in the fan. The air outlet increases the setting gradually in order to improve the circulation towards the discharge port to installation choked flow spare on the tail-hood will supply air towards the discharge port direction, avoids the return air to get into threshing system and screening system, influences the crop cleanliness factor. The air supply system has compact and stable structure, sufficient air quantity and no influence of return air, and greatly improves the winnowing efficiency.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to an air supply system of a harvester.
Background
The crawler-type combine harvester threshing system can be divided into a longitudinal axial flow type threshing and cleaning system and a transverse axial flow type threshing and cleaning system, and the threshing and cleaning systems in the two forms are the main structural forms used in the current market.
The harvester is mainly internally divided into a threshing system, a screening system and a winnowing system from top to bottom, the winnowing system is used for continuously blowing air towards the tail of the harvester, the air blows the air to pass through a falling area of crop grains and a mesh screen surface in the screening system, and impurities such as grass fragments and fluff which are lighter than the crop grains are blown out to an opening at the tail of the harvester, so that the crop grains with high cleanliness can be collected.
Among the current horizontal axial-flow type threshing cleaning system, because of the interior shelves width of horizontal axial-flow twin drum type thresher, threshing cylinder's workspace is wide promptly, consequently below air classification system need provide bigger amount of wind and bigger selection by winnowing coverage, current air classification system is single fan, can't satisfy this requirement, and when improving the amount of wind, how to avoid the clean degree that the wind of circling round of harvester afterbody discharge gate department influences crop seed grain also be the problem of waiting to solve urgently.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the low efficiency of the air separation system in the prior art.
Therefore, the invention provides an air supply system of a harvester, which comprises:
a fan having an air outlet;
an air supply channel is formed between the bottom shell positioned at the lower part of the harvester and the threshing system positioned at the upper part of the harvester;
the bottom shell comprises a fan shell, a seed bottom shell, a sundry bottom shell and a screen frame of a vibrating screen which are sequentially and continuously arranged;
a tail hood is arranged at the tail end of the threshing system far away from the fan; a discharge port is formed between the tail cover and the screen frame; a flow blocking element is arranged between the tail cover and the vibrating screen to guide the air supply to the discharge port;
in the vertical direction, the height of the discharge port is higher than that of the air outlet; the air outlet is obliquely arranged towards the discharge port; the fan shell, the seed bottom shell, the impurity residual bottom shell and the screen frame are inclined from one side of the air outlet to the discharge port and gradually increased;
the fan shell is provided with a cylindrical installation cavity;
two ends of the fan shell in the axial direction are respectively provided with a first air inlet communicated with the outside;
a second air inlet is formed in the side wall, opposite to the air outlet, of the fan shell along the circumferential direction of the side wall; and in the axial direction of the fan shell, the second air inlet is positioned in the middle of the fan shell.
Two air guide pieces are arranged in the air outlet at intervals in the vertical direction to form three air outlet branches; the two air guide pieces are respectively arranged on the rack in a turnover manner and are suitable for being respectively turned over to change the air outlet direction and the air outlet area of the three air outlet branches.
The choke comprises:
the threshing device comprises a threshing sealing plate horizontally fixed at the tail part of the threshing system and a tail hood sealing plate arranged between the threshing sealing plate and the tail end of the tail hood; the lower surfaces of the threshing sealing plate and the tail cover sealing plate form an air guide surface.
The fan still includes:
the fan structure is coaxially arranged in the mounting cavity;
and the fan drive is connected with the fan structure and is suitable for driving the fan structure to rotate in the mounting cavity.
Two wind shielding pieces are arranged on any one first air inlet; the wind shielding part is arranged at one side of the first air inlet and the air outlet, is suitable for sliding transversely and partially shields the upper half part of the first air inlet;
the other wind shielding part is arranged on one side, far away from the air outlet, of the first air inlet and is suitable for vertically sliding and partially shielding the lower half part of the first air inlet.
A strip-shaped hole is formed in the wind shielding piece; the wind shielding piece is bolted and fixed on the fan shell through the strip-shaped holes.
The fan structure includes:
the fan shaft is coaxially arranged in the mounting cavity, and two ends of the fan shaft are respectively fixed on two bearings positioned on the rack;
the supporting units are fixed on the fan shaft at uniform intervals;
a plurality of fan blades fixed on the supporting unit;
any of the support units includes:
the fan blade supports are sequentially connected and fixed along the circumferential direction of the fan shaft and locked on the fan shaft; the fan blades are respectively bolted and fixed on the fan blade brackets; all the fan blade supports enclose a regular polygon, and the regular polygon is circumscribed to a circle of the cross section of the fan shaft.
The fan blade support is bent to form a fixing section and an installation section; the end part of the mounting section is suitable for mounting the fan blade; an included angle alpha formed between the fixed section and the mounting section is complementary with an internal angle beta of a regular polygon formed by the fan blade support.
A flat-mouth groove is formed in the fan shaft corresponding to any one of the supporting units; one fan blade support is fixed in the flat-mouth groove.
The reinforcing plate is welded and fixed in the flat-mouth groove; the fan blade bracket is fixed on the upper surface of the reinforcing plate; the thickness of the reinforcing plate is the same as the depth of the flat-mouth groove; the width of the reinforcing plate in the radial direction of the fan shaft is not larger than the diameter of the fan shaft.
The technical scheme of the invention has the following advantages:
1. the invention provides an air supply system of a harvester, which comprises a fan, an air supply channel, a tail cover and a flow blocking piece. An air supply channel is formed between the bottom shell positioned at the lower part of the harvester and the threshing system positioned at the upper part of the harvester, and the bottom shell comprises a fan shell, a seed bottom shell, a sundry bottom shell and a screen frame of a vibrating screen which are sequentially and continuously arranged. The tail end of the threshing system far away from the fan is provided with a tail cover, a discharge port is formed between the tail cover and the screen frame, and a flow choking piece is arranged between the tail cover and the vibrating screen to guide the air supply towards the discharge port.
In vertical direction, the height that highly is higher than the air outlet of discharge port, the air outlet sets up towards the discharge port slope, fan casing, seed grain drain pan, miscellaneous surplus drain pan and reel incline and increase the setting gradually from air outlet one side towards the discharge port, first air intake with external intercommunication is seted up respectively at the both ends of fan casing, set up the second air intake along its circumference on the lateral wall relative with the air outlet in the middle of the fan casing, supply air through evenly distributed's three air intakes on the fan casing for the even stability of air capacity in the fan. The air outlet increases the setting gradually in order to improve the circulation towards the discharge port to installation choked flow spare on the tail-hood will supply air towards the discharge port direction, avoids the return air to get into threshing system and screening system, influences the crop cleanliness factor. The air supply system has compact and stable structure, sufficient air quantity and no influence of return air, and greatly improves the winnowing efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first schematic structural diagram of an air supply system according to an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of an air supply system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a spoiler in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a fan casing according to an embodiment of the present invention;
FIG. 5 is a schematic view showing an installation structure of a wind shielding member according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a fan structure according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a fan shaft according to an embodiment of the present invention;
fig. 8 is a perspective view of a fan structure according to an embodiment of the present invention.
Description of reference numerals:
1. a frame; 2a, a first roller; 3a, a second roller;
5e, bottom shell of the seeds; 6e, a miscellaneous residual bottom shell;
3f, a fan shell; 31f, a first air inlet; 32f, a second air inlet; 33f, an air outlet;
1h, screening frames;
1i, a fan shaft; 11i, a plain groove; 2i, fan blades; 3i, a fan blade bracket; 31i, a mounting section; 32i, a fixed section; 4i, a reinforcing plate; 51i, a first windshield; 52i and a second wind baffle;
1j, a rear seal plate; 2j, a tail cover; 3j, a flow resisting element; 31j, a threshing closing plate; 32j, a tail cover closing plate; 41j, an upper air deflector; 42j, a lower air deflector; 5j, discharge port.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a harvester air supply system, as shown in fig. 1, which includes a fan, an air supply channel, a tail cover 2j and a flow blocking element 3 j. An air supply channel is formed between a bottom shell positioned at the lower part of the harvester and a threshing system positioned at the upper part of the harvester, the bottom shell comprises a fan shell 3f, a seed bottom shell 5e, a sundry residue bottom shell 6e and a screen frame 1h of a vibrating screen which are sequentially and continuously arranged, and the threshing system comprises a first roller 2a and a second roller 3a which are horizontally arranged at intervals. The tail end of the threshing system far away from the fan, namely the side, close to the discharge port 5j, of the second roller 3a is provided with a tail hood 2j, the discharge port 5j is formed between the tail hood 2j and the screen frame 1h, and a flow blocking piece 3j is arranged between the tail hood 2j and the vibrating screen to guide the air supply to the discharge port 5 j.
In the vertical direction, the height of the discharge port 5j is higher than that of the air outlet 33f, as shown in fig. 2, the air outlet 33f is arranged towards the obliquely upper side, the fan shell 3f, the seed bottom shell 5e, the miscellaneous bottom shell 6e and the screen frame 1h are arranged from one side of the air outlet 33f to the discharge port 5j in an inclined manner and gradually increased, the two ends of the fan shell 3f are respectively provided with a first air inlet 31f communicated with the outside, the middle of the fan shell 3f is provided with a second air inlet 32f along the circumferential direction of the side wall opposite to the air outlet 33f, and air is supplied through three air inlets uniformly distributed on the fan shell 3f, so that the air volume in the fan is uniform and stable. The air outlet 33f is gradually increased towards the discharge port 5j to improve the circulation, and the flow blocking piece 3j is arranged on the tail cover 2j to guide the air supply towards the discharge port 5j, so that the return air is prevented from entering the threshing system and the screening system, and the crop cleanliness is prevented from being influenced. The air supply system has compact and stable structure, sufficient air quantity and no influence of return air, and greatly improves the winnowing efficiency.
As shown in fig. 2, two wind guides are disposed in the air outlet 33f at intervals in the vertical direction, and the air outlet 33f is separated to form three air outlet branches. In this embodiment, the air guide is a plate-shaped structure, and includes an upper air guide plate 41j located above and a lower air guide plate 42j located below. The two air guide pieces are respectively arranged on the rack 1 in a turnover manner and are suitable for being respectively turned over to change the air outlet direction and the air outlet area of the three air outlet branches. For example, two ends of the two air guides are respectively fixed on two fixing points (not shown in the figure) of the rack 1 through two bolts, one fixing point is a waist-shaped hole with a radian, and the air guides can swing around the other fixing point by an angle and lock the air guides in the waist-shaped holes when swinging to a proper position. Or each fixed point corresponds to a strip-shaped hole, the fixed positions of the two fixed points are different, so that the angle between the air guide piece and the horizontal plane can be adjusted, the turnover adjustment is of a conventional structure, and the repeated description is omitted.
In this embodiment, as shown in fig. 1, the tail hood 2j is bent, the rear sealing plate 1j is disposed between the tail hood 2j and the second drum 3a, the rear sealing plate 1j is horizontally disposed, and the tail hood 2j is hinged to the rear sealing plate 1j and is suitable for being turned upwards and opened. A cavity is formed between the tail hood 2j and the lower screen frame 1h, and the choke 3j is arranged in the cavity. As shown in fig. 3, the flow blocking member 3j includes a threshing sealing plate 31j horizontally fixed on one side of the second drum 3a close to the discharge port 5j, the threshing sealing plate 31j is parallel to the rear sealing plate 1j above, and a tail hood sealing plate 32j arranged between the threshing sealing plate 31j and the tail end of the tail hood 2j, the lower surfaces of the threshing sealing plate 31j and the tail hood sealing plate 32j form an air guide surface, so that the air blown out by the fan is prevented from entering a cavity between the tail hood 2j and the screen frame 1h after being raised on the surface of the screen frame 1h, and then enters the threshing system or the screening system along the wall of the hollow wall to affect the cleanliness of the crops and the efficiency of air separation. In this embodiment, the tail hood shrouding 32j is two sections face settings of mutual articulated, and tail hood shrouding 32j and thresh the articulated setting of shrouding 31j to can drive tail hood shrouding 32j upwards rotation simultaneously when tail hood 2j upwards opens, avoid needing earlier to dismantle tail hood shrouding 32j when tail hood 2j upwards overturns and opens, lead to complex operation, influence efficiency.
As shown in fig. 4 and 5, the blower includes a blower housing 3f, a fan structure, and a blower drive.
The fan structure is installed in a cylindrical installation cavity of the fan shell 3f, and first air inlets 31f communicated with the outside are respectively formed in two ends of the fan shell 3f in the axial direction. The first air inlet 31f is a circular air inlet and is concentrically arranged with the cross section of the cylindrical mounting cavity. An air outlet 33f is formed in the side wall of the fan shell 3f along the axial direction of the fan shell, and the width of the air outlet 33f is the same as that of the installation cavity. The air outlet 33f may be provided with an air guide structure for guiding the air to be blown toward a predetermined direction.
As shown in fig. 4, a second air inlet 32f is formed in a side wall of the fan housing 3f opposite to the air outlet 33f along the circumferential direction of the fan housing 3 f. The projection of the second air inlet 32f on the horizontal plane is square. The second air inlet 32f is located at a middle position of the fan housing 3f in the axial direction of the fan housing 3 f. In this embodiment, the second air inlet 32f is located on the fan housing 3f obliquely above the air outlet 33 f. The second air inlet 32f is formed in the middle of the shell and matched with the first air inlets 31f at two ends of the fan shell 3f to form three air inlets which are uniformly distributed on the fan shell 3f, so that enough air inlet amount is provided and air inlet is more uniform.
As shown in fig. 5, each of the first air inlets 31f on both sides is provided with a wind shielding member, in this embodiment, the wind shielding member is a plate-shaped structure, and each of the first air inlets 31f is correspondingly provided with two wind shielding members, as shown in fig. 5, the two wind shielding members are respectively a first wind shielding plate 51i disposed on a side close to the air outlet 33f and located on an upper half portion of the first air inlet 31f, and a second wind shielding plate 52i disposed on a side far from the air outlet 33f and located on a lower half portion of the first air inlet 31 f. In this embodiment, a communicating opening communicated with the outside is formed in the casing of the frame 1 corresponding to the first air inlet 31f, the communicating opening is the same as the first air inlet 31f in size, two ends of the fan casing 3f are abutted against the casing of the frame 1, the first air inlet 31f is right opposite to the communicating opening, the first wind shielding plate 51i and the second wind shielding plate 52i are respectively provided with a strip-shaped hole, the corresponding fan casing 3f and the frame 1 are provided with matching holes, the strip-shaped hole on the first wind shielding plate 51i is horizontally arranged, so that the first wind shielding plate 51i can transversely slide and partially shield the upper half part of the first air inlet 31 f. The vertical setting of the bar hole on the second air baffle 52i to the vertical slip of second air baffle 52i and the local lower half that shelters from first air intake 31f, through sheltering from of the piece that keeps out the wind, with the air inlet area of adjusting first air intake 31f, under the operating mode condition of difference, change the intake, make its application scope wider.
As shown in fig. 8, the fan structure includes a fan shaft 1i, a plurality of support units, and a plurality of fan blades 2 i. As shown in fig. 5, both ends of the fan shaft 1i extend out of the first air inlet 31f and are rotatably fixed in bearing seats provided in the frame 1. And one end of the fan shaft 1i is provided with a driving belt wheel for connecting a transmission shaft and providing a driving force for rotating the fan structure.
As shown in fig. 8, the support units are fixed on the fan shaft 1i at regular intervals, and the fan blades 2i are fixed on the support units, as shown in fig. 6, each support unit comprises a plurality of fan blade brackets 3i, which are bolted and fixed on the fan shaft 1i in sequence along the circumferential direction of the fan shaft 1i and locked on the fan shaft 1i, and the fan blades 2i are bolted and fixed on the fan blade brackets 3i respectively.
In this embodiment, the fan blade supports 3i are plate-shaped structures, the fan blade supports 3i are bent to form a fixing section 32i and an installation section 31i, in the same supporting unit, the fixing section 32i of one fan blade support 3i is bolted and fixed on the installation section 31i of the other fan blade support 3i, the plurality of fan blade supports 3i are sequentially connected end to end, a polygon is defined by the circumference of the fan shaft 1i, and the polygon is circumscribed with a circle of the cross section of the fan shaft 1 i. Through the mode of bolt with a plurality of flabellum supports 3i fixed around fan axle 1i, simple structure is stable, and convenient and fast, the easy change is dismantled to spare part.
All fan blade supports 3i in any supporting unit enclose a regular polygon, and an included angle alpha formed between the fixing section 32i and the mounting section 31i is complementary with an inner angle beta of the regular polygon. As shown in fig. 6 or 8, in this embodiment, four blade supports 3i are disposed in any one of the supporting units, and the fixing section 32i and the mounting section 31i in each blade support 3i are disposed at a right angle and jointly enclose a square circumscribing a cross-sectional circle of the fan shaft 1 i.
In this embodiment, as shown in fig. 7, a flat slot 11i is formed in a fan shaft 1i corresponding to any supporting unit, a reinforcing plate 4i is welded in the flat slot 11i, the thickness of the reinforcing plate 4i is the same as the depth of the flat slot 11i, that is, the upper surface of the reinforcing plate 4i is tangent to a circle of the cross section of the fan shaft 1i, and meanwhile, the radial width of the reinforcing plate 4i along the fan shaft 1i is not greater than the diameter of the fan shaft 1i, that is, the side length of a square surrounded by a fan blade support 3i is avoided being greater than the side length of the square, which results in assembly failure. In the present embodiment, the width of the reinforcing plate 4i is the same as the width of the flat groove 11 i. Through the limit of the flat slot 11i, the relative sliding between the fan blade support 3i and the fan shaft 1i caused by the small clamping force of the fan blade support 3i fixed on the fan shaft 1i is further avoided.
As shown in fig. 8, in this embodiment, four supporting units are sequentially disposed on the fan shaft 1i at intervals, four blades 2i are disposed on two supporting units located on the left side, the blades 2i are of a sheet structure, and each blade 2i spans over two supporting units and is bolted and fixed to the mounting sections 31i of the two blade brackets 3 i. The fan blades 2i on the two support units on the right side are arranged the same as on the left side, and the detailed structure is not described herein. Left and right sides flabellum 2i forms two sets of fan structures that are parallel, can provide more inlet air channel between two sets of fan structures for fan air supply area is big and the air supply is even.
As a first alternative embodiment of embodiment 1, a plurality of flat slots 11i may be formed in the fan shaft 1i, the flat slots 11i and the blade supports 3i are arranged in a one-to-one correspondence, and the blade supports 3i are directly and correspondingly embedded in the flat slots 11i, and are sequentially bolted end to be locked on the fan shaft 1 i.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A harvester air supply system, comprising:
a fan having an outlet (33 f);
an air supply channel is formed between the bottom shell positioned at the lower part of the harvester and the threshing system positioned at the upper part of the harvester;
the bottom shell comprises a fan shell (3f), a seed bottom shell (5e), a sundry residue bottom shell (6e) and a screen frame (1h) of a vibrating screen which are sequentially and continuously arranged;
a tail hood (2j) is arranged at the tail end of the threshing system far away from the fan; a discharge port (5j) is formed between the tail cover (2j) and the screen frame (1 h); a flow blocking element (3j) is arranged between the tail hood (2j) and the vibrating screen to guide the air supply to the discharge opening (5 j);
the height of the discharge opening (5j) is higher than that of the air outlet (33f) in the vertical direction; the air outlet (33f) is obliquely arranged towards the discharge port (5 j); the fan shell (3f), the seed bottom shell (5e), the impurity bottom shell (6e) and the screen frame (1h) are inclined from one side of the air outlet (33f) to the discharge port (5j) and gradually increase;
the fan shell (3f) is provided with a cylindrical installation cavity;
two ends of the fan shell (3f) in the axial direction are respectively provided with a first air inlet (31f) communicated with the outside;
a second air inlet (32f) is formed in the side wall, opposite to the air outlet (33f), of the fan shell (3f) along the circumferential direction of the side wall; in the axial direction of the fan housing (3f), the second air inlet (32f) is located at the middle position of the fan housing (3 f).
2. The harvester air supply system according to claim 1, wherein two air guides are arranged in the air outlet (33f) at intervals in the vertical direction to form three air outlet branches; the two air guide pieces are respectively arranged on the rack (1) in a turnover mode and are suitable for being respectively turned over to change the air outlet direction and the air outlet area of the three air outlet branches.
3. Harvester air supply system according to claim 1, characterized in that the choke (3j) comprises:
a threshing close plate (31j) horizontally fixed at the tail part of the threshing system, and a tail hood close plate (32j) arranged between the threshing close plate (31j) and the tail end of the tail hood (2 j); the lower surfaces of the threshing close plate (31j) and the tail cover close plate (32j) form an air guide surface.
4. The harvester air supply system of any one of claims 1-3, wherein the fan further comprises:
the fan structure is coaxially arranged in the mounting cavity;
and the fan drive is connected with the fan structure and is suitable for driving the fan structure to rotate in the mounting cavity.
5. The harvester air supply system according to claim 4, wherein two wind shielding members are arranged on any one of the first air inlets (31 f); the wind shielding part is arranged at one side of the first air inlet (31f) at the air outlet (33f), is suitable for transversely sliding and partially shields the upper half part of the first air inlet (31 f);
the other wind shielding piece is arranged on one side, away from the air outlet (33f), of the first air inlet (31f) and is suitable for vertically sliding and partially shielding the lower half part of the first air inlet (31 f).
6. The harvester air supply system of claim 5, wherein the wind shield is provided with a strip-shaped hole; the wind shielding piece is bolted and fixed on the fan shell (3f) through the strip-shaped holes.
7. The harvester air supply system of claim 4, wherein the fan structure comprises:
the fan shaft (1i) is coaxially arranged in the mounting cavity, and two ends of the fan shaft are respectively fixed on two bearings positioned on the rack (1);
a plurality of supporting units which are fixed on the fan shaft (1i) at uniform intervals;
a plurality of fan blades (2i) fixed to the support unit;
any of the support units includes:
the fan blade (2i) brackets are sequentially connected and fixed on the fan shaft (1i) along the circumferential direction of the fan shaft (1i) and locked on the fan shaft (1 i); the fan blades (2i) are respectively bolted and fixed on the fan blade (2i) bracket; all the fan blade (2i) supports enclose a regular polygon, and the regular polygon is circumscribed to a circle of the cross section of the fan shaft (1 i).
8. The harvester air supply system according to claim 7, wherein the fan blade (2i) bracket is bent to form a fixing section (32i) and a mounting section (31 i); the end of the mounting section (31i) is suitable for mounting the fan blade (2 i); an included angle alpha formed between the fixing section (32i) and the mounting section (31i) is complementary with an internal angle beta of a regular polygon formed by the fan blade (2i) bracket.
9. The air supply system of the harvester according to claim 8, wherein a flat slot (11i) is formed in the fan shaft (1i) corresponding to any one of the support units; one fan blade (2i) bracket is fixed in the flat groove (11 i).
10. The harvester air supply system of claim 9, further comprising a reinforcing plate (4i) welded and fixed in the flat slot (11 i); the fan blade (2i) bracket is fixed on the upper surface of the reinforcing plate (4 i); the thickness of the reinforcing plate (4i) is the same as the groove depth of the flat groove (11 i); the width of the reinforcing plate (4i) in the radial direction of the fan shaft (1i) is not greater than the diameter of the fan shaft (1 i).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616074.XA CN112655382B (en) | 2020-12-30 | Harvester air supply system | |
| PCT/CN2021/089962 WO2022141986A1 (en) | 2020-12-30 | 2021-04-26 | Air supply system of harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011616074.XA CN112655382B (en) | 2020-12-30 | Harvester air supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112655382A true CN112655382A (en) | 2021-04-16 |
| CN112655382B CN112655382B (en) | 2024-05-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022141986A1 (en) * | 2020-12-30 | 2022-07-07 | 江苏沃得农业机械股份有限公司 | Air supply system of harvester |
| WO2022142002A1 (en) * | 2020-12-30 | 2022-07-07 | 江苏沃得农业机械股份有限公司 | Harvester fan |
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| US3847160A (en) * | 1971-10-25 | 1974-11-12 | Clayson Nv | Cleaning device shielding means in combine harvesters |
| US4314571A (en) * | 1979-11-14 | 1982-02-09 | Sperry Corporation | Combine harvester |
| CN1367644A (en) * | 1999-06-09 | 2002-09-04 | 麦克劳德收获公司 | Method and apparatus for harvesting crops |
| EP2111739A1 (en) * | 2007-03-01 | 2009-10-28 | CNH Belgium N.V. | Combine harvester control |
| CN102027833A (en) * | 2010-10-08 | 2011-04-27 | 曹安柏 | Fuel-saving high-speed joint harvesting and planting management machine |
| CN106900275A (en) * | 2017-03-01 | 2017-06-30 | 青岛智享专利技术开发有限公司 | A kind of agricultural machinery corn harvesting corn must separate cropper |
| CN214178137U (en) * | 2020-12-30 | 2021-09-14 | 江苏沃得农业机械股份有限公司 | Air supply system of harvester |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3847160A (en) * | 1971-10-25 | 1974-11-12 | Clayson Nv | Cleaning device shielding means in combine harvesters |
| US4314571A (en) * | 1979-11-14 | 1982-02-09 | Sperry Corporation | Combine harvester |
| CN1367644A (en) * | 1999-06-09 | 2002-09-04 | 麦克劳德收获公司 | Method and apparatus for harvesting crops |
| EP2111739A1 (en) * | 2007-03-01 | 2009-10-28 | CNH Belgium N.V. | Combine harvester control |
| CN102027833A (en) * | 2010-10-08 | 2011-04-27 | 曹安柏 | Fuel-saving high-speed joint harvesting and planting management machine |
| CN106900275A (en) * | 2017-03-01 | 2017-06-30 | 青岛智享专利技术开发有限公司 | A kind of agricultural machinery corn harvesting corn must separate cropper |
| CN214178137U (en) * | 2020-12-30 | 2021-09-14 | 江苏沃得农业机械股份有限公司 | Air supply system of harvester |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022141986A1 (en) * | 2020-12-30 | 2022-07-07 | 江苏沃得农业机械股份有限公司 | Air supply system of harvester |
| WO2022142002A1 (en) * | 2020-12-30 | 2022-07-07 | 江苏沃得农业机械股份有限公司 | Harvester fan |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022141986A1 (en) | 2022-07-07 |
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