JPH11308921A - Case structure for sirocco fan in combined harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a case structure of the sirocco fan in a combined harvester that can inhibits the back-flow of the sucking air-flow as much as possible and can secure the circulation of smooth discharge flow by suppressing the back flow and turbulent flow of the discharge flow in the blow-off point, as the air sucking and air blowing efficiency of the sirocco fan is increased. SOLUTION: The inlet duct and the outlet duct for the sucked air 21 is formed with the front wall 21a extending upward along the rotation trace 20 on the sucking side and the back wall 21b extending downward along the rotation trace 20 on the blow-off side of the sirocco fan 19, and the lower edge 23 of the front wall 21a is extended in the vertical direction along the rotation trace 20 of the sirocco fan 19. In this case, a guide 24 having the expanding face along the blowing direction of the sirocco fan 19 is provided on the upper edge of the back wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing sorting body which is installed in a sorting air passage formed from a lower front of a handling cylinder to a rear wind sorting chamber, and a paddy is formed through the swing sorting operation. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine structure configured to separate and sort, and mainly relates to a case structure of a sirocco fan that performs a wind selection operation for a second product.

[0002]

2. Description of the Related Art Generally, a wind selection chamber is provided rearward in the axial center of a handling cylinder, and a swing sorting body is installed in a sorting air passage formed from a lower front portion of the handling cylinder toward the wind selection chamber. In the combine, as shown in FIG. 4, the paddy is first and second crushed by the specific gravity sorting action by the back and forth swinging motion of the swing sorting body a and the wind sorting action by the sorting wind that blows through the sorting wind path b. Sorted and separated into extraordinary substances such as sticks and rice husks, the first thing is dropped into the first gutter c, then collected in a paddy tank by a fryer (not shown), and the second one is dropped into the second gutter d. After that, it is returned to the oscillating sorting body a by the second reduction cylinder and subjected to re-selection, and the rice husks are sucked by the suction fan f in the dust chamber e and the dust outlet g at the rear of the machine.
From the aircraft.

In the above-described specific gravity sorting operation by the swinging sorter a, the second item is re-selected by the compressed air of the sirocco fan h provided thereunder, as shown in FIG. As described above, part of the supply air O on the suction side of the sirocco fan h flows backward at the lower end edge position Q of the front wall P forming the case of the sirocco fan h, and the air suction efficiency of the sirocco fan h is reduced. In addition, since the case shape R on the blowout side does not coincide with the blowing direction of the air O, backflow or turbulence is easily induced at the position of the case shape R, and further, the case remains at the case shape R position. Air O
Of the sirocco fan h is carried around to the suction side of the sirocco fan h, and as a result, there is room for improvement in that the efficiency of suction and blowout of the sirocco fan h is reduced.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation and has been made to improve the situation. The object of the present invention is to reduce the reverse flow of the intake air flow as much as possible. Can suppress the inhalation of sirocco fans,
An object of the present invention is to provide a case structure of a sirocco fan in a combine that can improve the blowing efficiency and suppress a reverse flow and a turbulent flow of a discharge flow at a blow position to ensure a smooth flow of the discharge flow.

[0005]

Means for Solving the Problems In order to solve the problems, a first technical means adopted by the present invention is to swing a sorting air passage formed from a front lower part of a handling cylinder toward a rear air selecting chamber. In the combine constructed by arranging the moving sorting body and re-selecting the thresh processed product by the compressed wind from below the sirocco fan arranged in the machine body width direction, along the rotational path on the suction side of the sirocco fan upward. The front wall that extends and the rear wall that extends downward along the rotation trajectory on the blowout side form an inlet / outlet path for intake air, and the lower edge of the front wall extends in a hanging direction along the rotation trajectory of the sirocco fan. As a second technical means, a guide body having an expanding surface along the blowing direction of the sirocco fan is provided at an upper end edge of a rear wall, and as a third technical means, With the extended lower edge of the front wall The guide body provided at the upper edge of the wall is provided at a position facing the axis of the sirocco fan, and as a fourth technical means, the outer peripheral rotation of the left and right ends of the sirocco fan is provided. The windshield member facing the trajectory extends on the left and right side walls of the suction opening from the lower edge of the front wall to the lower edge of the rear wall.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a handling room mounted on a traveling body of a combine (not shown),
In the handling room 1, a first handling cylinder 2 is rotatably mounted in the front-rear direction of the fuselage, and a second handling cylinder 3 is mounted on the rear side of the first handling cylinder 2. A rocking sorter 6 composed of a corrugated non-porous transfer plate 4 and a plurality of sheaves 5, 5...

[0007] In addition, below the rocking sorting body 6,
And a separation air passage 10 formed of the first flow plate 8 and the second flow plate 9, and sorts out the paddy that has leaked through a receiving net (not shown) by the forward and backward swinging motion of the swing sorting body 6. In cooperation with the action and the wind sorting action by the sorting wind that blows through the sorting wind path 10, the first thing, the second thing and the impurities such as the chaff are separated and separated, and the first thing is the first spiral 11a. It is dropped on the first gutter 11 provided and collected in a paddy tank via a fried grain tube (not shown). The second product is dropped on the second gutter 12 provided with the second spiral 12a and then a second reduction cylinder (not shown). Swinging body 6 through
It is returned to the top for re-election, and the rice husks are
The suction fan 14 sucks the dust, and the dust exhaust port 15
It is configured to be discharged out of the machine. 16,
Reference numeral 17 denotes a wind-dissipating plate which is located above the first gutter 11 and the second gutter 12 and is provided in the sorting air passage 10, and 18 denotes a straw rack.

A sirocco fan 19 for supplying compressed air from below to the straw rack 18 is provided in front of the second gutter 12 in the body traveling direction, and is arranged in the body width direction, as shown in FIG. As described above, the front wall 21a (upper surface of the first flow plate 8) extending upward along the rotation trajectory 20 on the suction side of the sirocco fan 19, and the second flow plate extending downward along the rotation trajectory 20 on the blow side. 9, a suction opening 22 and a blowing opening 22 ′ that form an inlet / outlet of the suction air 21 are formed in the width direction of the machine body, respectively, and a lower edge 23 of the front wall 21 a is Sirocco fan 1
9 is configured to extend in the hanging direction along the rotation trajectory 9 and to prevent backflow of the intake air 21 on the intake opening 22 side.

A guide body 24 having a triangular cross section is integrally attached to the upper end edge of the rear wall 21b in the machine body width direction, and its guide surface 24a expands along the blowing direction of the sirocco fan 19. Further, the lower end edge 23 of the front wall 21a and the guide body 24 are connected to each other by the sirocco fan 1.
Nine rotating shafts 19a are provided at opposing positions.

Since the present invention is configured as described above,
When the threshing operation is started with the first and second handling cylinders 2 and 3 while the harvesting operation is being performed by the body running of the combine, the specific gravity sorting action by the forward and backward swinging motion of the swinging sorting body 6 connected thereto is caused by the sorting wind. The first thing is collected in the paddy tank from the first gutter 11 through a fryer tube (not shown), and the second thing is the second gutter. From the 12, through the second reduction cylinder, the water is returned to the oscillating sorting body 6 to perform the re-selection action. At the same time, the rice waste is discharged from the dust discharge chamber 13 through the suction fan 14 to the dust discharge port 15. From the aircraft.

In the swing sorting operation centered on the swing sorter 6 as described above, in the present invention, in particular, the lower edge 23 of the front wall 21a for guiding the intake air 21 upward is shown in FIG.
As shown in (b), since the sirocco fan 19 extends in the hanging direction along the rotation trajectory 20 of the sirocco fan 19 in the suction opening 22, the backflow or intake leakage of the suction air 21 at the position of the lower end edge 23 is eliminated. As a result, the inhalation efficiency can be improved.

Further, since the guide body 24 having the guide surface 24a along the blowing direction of the sirocco fan 19 is provided at the upper end edge of the rear wall 21b located at the blowing opening 22 ', backflow or turbulence at that position is provided. The blowing operation of the intake air 21 can be smoothly performed without inducing the generation of the flow, and the rotation of the blown air 21 to the suction side can be suppressed as much as possible, and the blowing of the sirocco fan 19 can be performed. Efficiency can also be improved.

FIGS. 3 (a) and 3 (b) show a structure in which the lower end edge 23 of the front wall 21a extends and the guide body 24 having the guide surface 24a is provided on the upper end edge of the rear wall 21b. The baffle members 25, 25 facing the outer peripheral rotation trajectories of the left and right ends of the sirocco fan 19 are changed to the left and right side walls 26, 26 of the suction opening 22 from the lower edge 23 of the front wall 21 a to the lower edge 21 b ′ of the rear wall 21 b. It shows a configuration example extended to
In this example, the intake air 2 is formed in the spaces 27, 27 necessarily formed between the outer peripheral rotation trajectory of the left and right ends of the sirocco fan 19 and the side walls 26, 26 adjacent thereto.
The turbulent flow and the rotation of the blown air once discharged toward the suction side can be prevented beforehand by the windshield member 25, and the suction and blowout efficiency of the sirocco fan 19 can be further improved.

[0014]

In summary, according to the present invention, an oscillating sorter is installed in a sorter air duct formed from the lower front of the handling cylinder toward the rear wind sorter and the threshing material is arranged in the machine width direction. In the combine configured to be re-selected by the compressed wind from below the provided sirocco fan, a front wall extending upward along a rotation trajectory on the suction side of the sirocco fan and a downward wall extending along a rotation trajectory on the blowout side are provided. The rear wall forms an inlet / outlet path for intake air, and the lower edge of the front wall extends in a downward direction along the rotation trajectory of the sirocco fan, so that the backflow of the intake air flow can be suppressed as much as possible. Thus, the sirocco fan suction and blowout efficiency can be improved. A guide body having an expanding surface along the blowing direction of the sirocco fan is provided on an upper edge of a rear wall, and a guide body provided on an extended lower edge of a front wall and an upper edge of a rear wall is a sirocco fan. The sirocco fan suction and blowout efficiency is improved and the turbulence of the discharge air at the blowout position of the sirocco fan is suppressed to ensure smooth discharge air flow. be able to. Furthermore, since the baffle members facing the outer peripheral rotation trajectories of the left and right ends of the sirocco fan are provided on the left and right side walls of the suction opening from the lower edge of the front wall to the lower edge of the rear wall, the discharge flow is sucked toward the suction side. Of the sirocco fan can be improved by preventing carryover and leakage. And so forth, which are useful new effects.

[Brief description of the drawings]

FIG. 1 is a partially omitted side view of a handling room.

FIG. 2A is an enlarged side sectional view of a main part showing a positional relationship between a sirocco fan and front and rear walls. (B) is an operation explanatory view showing a flow of intake air in a rotation operation of the sirocco fan.

FIG. 3A is a partially omitted cross-sectional view showing end faces of windshield members attached to left and right side walls, respectively. (B) is an operation explanatory view of the main part of the above.

FIG. 4 is a partially omitted side view of a conventional handling room.

FIG. 5 is an operation explanatory view showing a conventional flow of intake air in a rotation operation of a sirocco fan.

[Description of Signs] 2 First Handling Cylinder 6 Swing Sorting Body 10 Sorting Air Path 19 Sirocco Fan 19a Rotary Shaft (Axis Position) 20 Rotation Trajectory 21 Intake Air 21a Front Wall 21b Rear Wall 23 Bottom Edge 24 Guide Body 24a Guide Surface (expansion surface) 25

Claims (4)

[Claims] An oscillating sorting body is installed in a sorting air passage formed from a lower front of a handling cylinder to a rear wind screening chamber, and a thresh-processed material is arranged from below a sirocco fan arranged in a machine body width direction. Combines configured to be re-elected by the pressure wind of
A front wall extending upward along a rotation trajectory on the suction side of the sirocco fan and a rear wall extending downward along a rotation trajectory on the blowout side form an inlet / outlet for intake air, and a lower edge of the front wall is formed. A case structure of a sirocco fan in a combine, wherein the sirocco fan extends in a hanging direction along a rotation trajectory of the sirocco fan. 2. A case structure for a sirocco fan in a combine according to claim 1, wherein a guide body having an expanding surface along a blowing direction of the sirocco fan is provided on an upper edge of a rear wall. 3. The sirocco fan according to claim 2, wherein the guide members provided at the extended lower end edge of the front wall and the upper end edge of the rear wall are provided at opposing positions sandwiching the axial center position of the sirocco fan.
A sirocco fan case structure in the described combine. 4. The sirocco fan according to claim 1, wherein the wind stop member facing the outer peripheral rotation trajectory of the left and right ends extends from the lower end of the front wall to the left and right side walls of the suction opening from the lower end of the rear wall. The case structure of a sirocco fan in a combine according to any one of claims 1 to 3.