Vertical impurity removal fan of corn harvester

Abstract

The utility model discloses a vertical impurity removal fan of a corn harvester, which comprises a fan bracket, a fan shell hung on the fan bracket, and a fan shaft inserted into the center of the fan shell, and is characterized in that a plunger motor is vertically arranged on the fan bracket, the output end of the plunger motor is coaxially connected with the fan shaft, and the output end of the plunger motor is coaxially connected with the fan shaft. The motor is used for driving the impurity removal fan to rotate in a stepless speed regulation manner; the fan shell is in a volute shape, an impeller is arranged on the fan shaft and located in the fan shell, the impeller comprises a hub sleeve, a disc and a plurality of fan blade plates are fixed to the outer edge of the hub sleeve, the fan blade plates are evenly distributed on the periphery of the hub sleeve, the fan blade plates are connected to the lower face of the disc, and an included angle is formed between each fan blade plate and the axis of the hub sleeve. The dual functions of mashing and impurity removal are realized; and a cutter is fixed on the fan shaft in the lower port of the fan shell and is used for cutting up the sucked long straws. The impurity removal fan can realize stepless speed regulation, is high in impurity removal efficiency, and has dual functions of mashing and impurity removal.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a vertical impurity exhaust fan for a corn harvester. Background Art

[0002] When harvesting corn, a corn harvester lifts the removed ears to the top of the machine via an elevator and then drops them through an ear drop-out hole into the husker. Currently, corn harvesters struggle to simply remove the ears from the stalks during this process. The removed ears, mixed with a certain amount of miscellaneous leaves, enter the elevator. These are then lifted to the top by the elevator and then dropped into the husker, increasing the husker's workload and reducing the efficiency of huskering the corn. To address this technical issue, a dust removal fan is often installed on one side of the husker drop-out hole, with the fan's outlet facing the husker drop line. This fan blows away the miscellaneous leaves as they fall.

[0003] Existing impurity exhaust fans are mostly driven by motors through belts or chains, which are inconvenient to adjust the speed. In addition, most fans are horizontal cross-flow fans that rely on their huge air volume to exhaust impurities. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vertical debris removal fan for a corn harvester which can realize stepless speed regulation and has high debris removal efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A vertical exhaust fan for a corn harvester includes a fan bracket, a fan housing is suspended on the fan bracket, and a fan shaft is inserted into the center of the fan housing. The fan is characterized by:

[0007] A plunger motor is vertically mounted on the fan bracket, and an output end of the plunger motor is coaxially connected to the fan shaft to drive the exhaust fan to rotate at an infinitely variable speed;

[0008] The fan housing is in the shape of a volute, and an impeller is provided on the fan shaft and located inside the fan housing. The impeller includes a hub sleeve, a disc and a plurality of blades evenly distributed around the circumference are fixed to the outer edge of the hub sleeve, and the blades are connected to the bottom of the disc and form an angle with the axis of the hub sleeve; the impeller is used to achieve the dual function of crushing and removing impurities;

[0009] A cutter is fixed on the fan shaft in the lower port of the fan housing for chopping up the sucked-up long straw.

[0010] A further improvement of the technical solution of the present utility model is that the fan bracket is welded by a vertically arranged door-type frame and a horizontal bracket horizontally arranged on one side of the upper end of the door-type frame, the fan casing is hoisted under the horizontal bracket by a plurality of L-shaped hangers, and the plunger motor is supported on the horizontal bracket by a motor base plate.

[0011] A further improvement of the technical solution of the present utility model is that the output end of the plunger motor is connected to the fan shaft through a diaphragm clutch.

[0012] A further improvement of the technical solution of the present invention is that the fan blade is trapezoidal and the short side is connected to the outer edge of the hub sleeve, and a fan blade lining is fixed on one side of the fan blade to improve the strength of the fan blade.

[0013] A further improvement of the technical solution of the present utility model is that: a discharge nozzle is connected to one end of the discharge port of the fan housing, an upper cover is hinged at the upper end of the discharge nozzle, a lower rubber plate is provided at the lower end of the discharge nozzle, the front end of the upper cover is connected to the lower rubber plate through two symmetrically arranged movable pull plates, and a zipper with adjustable length is connected between the upper cover and the fan bracket to facilitate adjustment of the height of the discharge port.

[0014] A further improvement of the technical solution of the present utility model is that: a wind tube is connected to the lower end of the fan housing through a sleeve, and the shape of the wind tube is round on the upper side and square on the lower side, which is used to connect to the fuselage of the corn harvester and form a ventilation and impurity removal duct; a vertically arranged damper is slidably installed on one side of the air inlet of the wind tube, and a control arm is hinged on the wind tube through two support plates. The control arm is connected to the damper through two hanging rings to facilitate the adjustment of the height of the damper, thereby changing the negative pressure of the air inlet to achieve the effect of adjusting the air suction and impurity removal.

[0015] The technical advancements achieved by this utility model are:

[0016] 1. By means of a plunger motor provided on the fan bracket, the output end of the plunger motor is coaxially connected to the fan shaft, so that the stepless speed regulation of the exhaust fan can be achieved, and the fan shaft speed can be switched freely from 0 to 2000 rpm.

[0017] 2. The impeller on the fan shaft cooperates with the volute-shaped fan housing to achieve a centrifugal fan structure with large air volume. The impeller is in direct contact with the debris, which can both remove and discharge the debris, and has the dual functions of crushing and discharging debris, and high working efficiency.

[0018] 3. The cutter located on the fan shaft and in the lower port of the fan housing can continuously cut off the sucked-in long straw, making the impurity removal efficiency higher.

[0019] 4. By adjusting the length of the zipper between the upper cover and the fan bracket, the height of the outlet can be manually adjusted to avoid blowing down the unharvested corn nearby. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 yes Figure 1 Left view of .

[0022] Figure 3 yes Figure 2 AA cross-sectional view.

[0023] Figure 4 yes Figure 1 Stereoscopic image.

[0024] Figure numerals: fan bracket 1, fan housing 2, plunger motor 3, zipper 4, upper cover 5, discharge nozzle 6, movable pull plate 7, lower rubber plate 8, lifting ring 9, control arm 10, damper 11, splint 12, L-shaped hanger 13, horizontal bracket 14, door frame 15, air cylinder 16, cutter 17, impeller 18, fan blade plate 19, disc 20, hub sleeve 21, bearing seat 22, fan shaft 23, diaphragm clutch 24, motor base plate 25, through pin 26, fan blade lining 27, sleeve 28, long shaft 29. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, the utility model relates to a vertical dust exhaust fan for a corn harvester, comprising a fan bracket 1, a fan housing 2 being suspended on the fan bracket 1, and a fan shaft 23 being inserted into the center of the fan housing 2; a plunger motor 3 being vertically mounted on the fan bracket 1, and the output end of the plunger motor 3 being coaxially connected to the upper end of the fan shaft 23 through a diaphragm clutch 24, for driving the dust exhaust fan to rotate in an infinitely variable speed manner.

[0027] The fan bracket 1 is welded together by a vertically arranged portal frame 15 and a horizontal bracket 14 arranged horizontally on one side of the upper end of the portal frame 15. The fan housing 2 is suspended below the horizontal bracket 14 via multiple L-shaped hangers 13. The plunger motor 3 is supported on the horizontal bracket 14 via a motor base plate 25. The upper portion of the fan shaft 23 is mounted on the horizontal bracket 14 via two sets of bearing blocks 22 and bearings arranged vertically.

[0028] The fan housing 2 is volute-shaped, with an impeller 18 mounted on a fan shaft 23 within the fan housing 2. This impeller 18 comprises a hub 21, a circular disc 20 secured to the outer edge of the hub 21, and a plurality of blades 19 evenly distributed around the circumference. The blades 19 are attached to the underside of the circular disc 20 and form an angle with the axis of the hub 21, thereby achieving the dual functions of crushing and removing impurities. The blades 19 are trapezoidal, with their short sides connected to the outer edge of the hub 21. A blade liner 27 is secured to one side of the blade 19 to enhance its strength.

[0029] On the fan shaft 23, be positioned at the lower port of blower housing 2 and be fixed with cutter 17, be used for the long straw that sucks up is chopped.On the fan shaft 23, be positioned at impeller 18 and cutter 17 and be provided with spacer sleeve.

[0030] The cutter 17 includes a center sleeve and a straight blade. The center sleeve and the blade are sleeved on the fan shaft 23 and fixed by two symmetrically arranged bolts. The center sleeve and the fan shaft 23 are limited by a through pin circumference. The blade is embedded in the radial notch at the lower end of the center sleeve and is limited by a limit cover and a nut provided at the lower end of the fan shaft 23.

[0031] A downward-angled discharge nozzle 6 is bolted to one end of the discharge port of the fan housing 2. An upper cover plate 5 is hinged to the upper end of the discharge nozzle 6 via a long axis 29. Two lower rubber plates 8 are arranged in a front-to-rear arrangement on the lower cover plate at the lower end of the discharge nozzle 6. The front end of the upper cover plate 5 is connected to the two lower rubber plates 8 via two symmetrically arranged movable pull plates 7. An adjustable zipper 4 is connected between the upper cover plate 5 and the fan bracket 1 to facilitate adjustment of the height of the discharge port. A slat is screwed between the lower ends of the two movable pull plates 7 and the two lower rubber plates 8. The upper end of the zipper 4 is limited by a through pin 26 located on the fan bracket 1 to facilitate adjustment of the zipper's length.

[0032] The lower end of the fan housing 2 is connected to a wind tube 16 via a sleeve 28 and bolts. The wind tube 16 is shaped like a circle on the top and a bottom on the bottom, and is used to connect to the body of the corn harvester and form a ventilation and impurity removal duct. A vertically arranged damper 11 is slidably mounted on a slide formed by two pairs of clamping plates 12 on one side of the air inlet of the wind tube 16. A control arm 10 is hinged to the wind tube 16 via two support plates. The control arm 10 is connected to the damper 11 via two hanging rings 9 to facilitate adjusting the height of the damper 11, thereby changing the negative pressure at the air inlet to achieve the desired effect of adjusting the air suction and impurity removal. After adjusting the height of the damper 11, the height of the damper 11 can be locked by tightening the bolts set on the two pairs of clamping plates 12.

[0033] During operation, the impeller 1 is fixed to the frame of the corn harvester via the fan bracket 1. The fan shaft 23 is driven to rotate by the plunger motor 3, thereby driving the impeller 18 and the straight blade to rotate synchronously, thereby realizing stepless speed regulation of the impeller 23, and allowing the fan shaft 23 to rotate at will from 0 to 2000 rpm. When the impeller 18 rotates, a negative pressure is generated in the air duct 16, which can suck straw, fruit ears, leaves, and debris into the fan housing 2; when the blade rotates, it can chop long straw, and the chopped straw, fruit ears, leaves, and debris enter the fan housing 2 and come into contact with the impeller 18; the high-speed rotation of the impeller 18 can achieve the dual functions of crushing and removing impurities for the incoming material, and finally discharge it through the discharge nozzle 6.

[0034] The embodiments described above are merely descriptions of preferred implementation methods of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A vertical exhaust fan for a corn harvester, comprising a fan bracket, a fan housing suspended on the fan bracket, and a fan shaft inserted in the center of the fan housing, characterized by: A plunger motor is vertically mounted on the fan bracket, and an output end of the plunger motor is coaxially connected to the fan shaft to drive the exhaust fan to rotate at an infinitely variable speed; The fan housing is in the shape of a volute, and an impeller is provided on the fan shaft and located inside the fan housing. The impeller includes a hub sleeve, a disc and a plurality of blades evenly distributed around the circumference are fixed to the outer edge of the hub sleeve, and the blades are connected to the bottom of the disc and form an angle with the axis of the hub sleeve; the impeller is used to achieve the dual function of crushing and removing impurities; A cutter is fixed on the fan shaft in the lower port of the fan housing for chopping up the sucked-up long straw.

2. The vertical exhaust fan for a corn harvester according to claim 1, characterized in that: The fan bracket is welded together by a vertically arranged portal frame and a horizontal bracket arranged horizontally on one side of the upper end of the portal frame. The fan housing is suspended under the horizontal bracket through multiple L-shaped hangers, and the plunger motor is supported on the horizontal bracket through a motor base plate.

3. The vertical exhaust fan for a corn harvester according to claim 1, characterized in that: The output end of the plunger motor is connected to the fan shaft through a diaphragm clutch.

4. The vertical exhaust fan for a corn harvester according to claim 1, characterized in that: The fan blade plate is trapezoidal and its short side is connected to the outer edge of the hub sleeve. A fan blade lining plate is fixed on one side of the fan blade plate to improve the strength of the fan blade plate.

5. A vertical exhaust fan for a corn harvester according to any one of claims 1 to 4, characterized in that: A discharge nozzle is connected to one end of the discharge port of the fan housing, an upper cover is hinged at the upper end of the discharge nozzle, and a lower rubber plate is provided at the lower end of the discharge nozzle. The front end of the upper cover is connected to the lower rubber plate through two symmetrically arranged movable pull plates, and a zipper with adjustable length is connected between the upper cover and the fan bracket to facilitate the adjustment of the height of the discharge port.

6. The vertical exhaust fan for a corn harvester according to claim 5, characterized in that: A wind tube is connected to the lower end of the fan housing through a sleeve. The shape of the wind tube is round on the upper side and square on the lower side. It is used to connect to the fuselage of the corn harvester and form a ventilation and impurity removal duct. A vertically arranged damper is slidably installed on one side of the air inlet of the wind tube. A control arm is hinged on the wind tube through two support plates. The control arm is connected to the damper through two hanging rings to facilitate the adjustment of the height of the damper, thereby changing the negative pressure of the air inlet to achieve the effect of adjusting the air suction and impurity removal.

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