JP2002204617A - Blower for thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an air blasting from blowers laid in parallel right and left have a uniform air velocity distribution to prevent air from flowing backward and flowing in whirls and chaff from accumulating at the front part of a separa tion air trunk in a thresher in which the separation air trunk is formed toward the rear by the air blasting from the blowers laid in parallel right and left. SOLUTION: A central front part of the separation air trunk P is blocked by a straightening body 37 projecting backward between the blowers 24 laid in parallel right and left and a lower wall of the air trunk at the lower part of the straightening body 37 is cut off to make an air suction part 39 to the blowers 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower fan of a threshing machine in which blower fans are arranged side by side in a sorting room of a threshing machine, and the sorting fan passage is formed rearward by blowing air from the blower fan. It is related.

[0002]

2. Description of the Related Art Generally, left and right blowing fans are arranged side by side with a blowing fan arranged in a sorting room of a threshing machine, and a wide sorting wind path is directed rearward by blowing air from the blowing fans. Formed ones are known. That is, as shown in FIG. 5, two blowers a are arranged side by side on the left and right across an induction wind path c for introducing suction air into the suction port b. By being communicated with the starting end of the sorting air path e, the sorting wind is sent to the sorting air path e.

[0003] However, the blower fans arranged in such a manner are arranged side by side.
a, the individual blower fans a communicated with the starting end of the sorting air passage e suck air from the suction port b and blow air from the discharge port d as shown by arrows a and b. Although it is possible to blow a sufficient amount of sorting wind, the sorting wind blown out from the discharge port d is located in the center front part of the sorting wind path e close to the discharge port d of the side-by-side blower fan a. As shown by the arrow C, the air flows backward toward the induction air path c between the opposed suction ports b, so that the wind swirls in the central front part of the selection air path e, and if the wind speed distribution is uniform, However, there is a problem that the sorting performance is affected. In addition, if the central front part of the sorting wind path e is closed to cope with this, the part where the air is sucked into the blower fan a becomes narrow, and it is not possible to secure a sufficient air volume. Another problem was that the water accumulated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. It is an object of the present invention to provide a blower fan of a threshing machine which can ensure a sufficient air volume as a uniform wind speed distribution without a wind swirling or accumulating paddy in a central front portion of the threshing machine.

[0005]

In order to solve the above-mentioned problems, a technical means taken by the present invention is a threshing machine in which a sorting wind path is formed rearward by blowing air from blowing fans arranged side by side. At the same time, the central front portion of the selection air passage is closed between the juxtaposed blower fans by a straightening body projecting rearward, and a lower air passage lower wall of the straightening body is cut off to form an air suction portion to Karamin. It is characterized by having done.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail based on an embodiment shown in the drawings. First, Figure 1
In the drawing, reference numeral 1 denotes a threshing machine, and a handling cylinder 4 having a large number of handling teeth 3 fixedly mounted on a handling chamber 2 provided at a front portion thereof is rotatably mounted on a shaft. Reference numeral 5 denotes a grain stalk supply port to the handling chamber 2, reference numeral 6 denotes a feed chain, and reference numeral 7 denotes a dust outlet opening to one rear side of the handling chamber 2. It is provided for.

A processing cylinder 10 having processing teeth 9 fixedly mounted inside the processing chamber 8 is mounted on a shaft parallel to the handling cylinder 4, and the processed material after threshing in the handling chamber 2 is fed. The processing drum 10 is fed from the dust port 7 into the processing chamber 8 and further processed by the rotating processing drum 10 to separate the paddy.
1 to discharge. Reference numeral 12 denotes a receiving net provided around the outer periphery of the handling cylinder 4, and reference numeral 13 denotes a receiving net provided along the outer periphery of the processing drum 11.

The sorting room 14 is located below the handling room 2 and the processing room 8.
A suction fan 15 is provided at the rear of the sorting chamber 14, and a suction guide plate 16 and a dust discharge hood 17 are provided before and after the suction fan 15. Reference numeral 18 denotes a straw chain that conveys the straw after threshing to the rear, and 19 denotes a straw cutter that shreds the straw.

In the sorting chamber 14, an upper sorting body composed of a rocking plate 20, a chaff sheave 21, and the like, and a Glen Sheave 2 are provided.
2. A lower sorting body composed of a straw rack 23 and the like is installed so as to be swingable back and forth, and a sorting air path P by blowing air from Karino 24 as a blowing fan is formed below the lower sorting body. 25 is the first spiral, 26 is the second spiral, and the grains collected in the first spiral 25 are fried spiral 2
7, and the second product is reduced from the second spiral 26 through the reduction cylinder 28. 29 is a sirocco fan.

As shown in FIG. 2 to FIG. 4, two Karino mines 24, 24 are arranged side by side at a predetermined interval. That is, 30 is a drive shaft arranged in the left-right direction, and the left and right air blow blades 31, 31 mounted on the drive shaft 30 are covered with the cover bodies 32, 32, so that the left and right Karino 24 are constituted. I have. Each of the left and right side plates 33 of each of the above-described Karino 24 has an inlet 3
4 is formed, and a guide air path 35 for guiding suction air to the suction port 34 is formed between the inner side plates 33 facing each other. A discharge port 36 of the wind sucked from the suction port 34 is opened rearward, and the air is blown from the discharge port 36 to form a sorting air path P rearward.

[0011] A central front portion of the sorting air passage P, which is located between the juxtaposed Karamin 24, 24, that is, a rear end side of the induction air passage 35 is closed by a rectifier 37. The rectifying body 37 is erected at the front end of the bottom plate 14a of the sorting chamber 14, and is formed in a triangular prism shape whose vertex protrudes rearward as shown in FIG. 2, and has left and right inclined surfaces 37a, 37a. The side plates 38, 38 extending forward from the front edge are flush with the side plates 33, 33 inside the karino 24, 24.
Ventilation from 6, 36 is guided by side plates 33, 33 and inclined surfaces 37a, 37a protruding rearward and joined to form a uniform wind speed distribution. By cutting out the bottom plate 14a, which serves as the lower wall of the air passage below the straightening body 37,
An air suction portion 39 for the Karino 24 is formed in communication with the lower side of the bottom plate 14a.

FIG. 6 shows a case in which a bell mouth 40 for guiding the suction air is attached to the side surface of the Karamin 24. The bell mouth 40 has an air inlet 41 formed in a circular shape, so that the pressure of the air cannot escape as compared with the conventional Karino having a square inlet, and the wind power increases.
The bell mouth 40 is formed so that it can be divided into two parts from the position of the center line.

[0013] With the above construction, when the sorting air path is formed by blowing air from Karino 24, the central front part of the sorting air path P is closed off by the rectifying body 37, so that the juxtaposed Karomi 24 is arranged. The wind discharged rearward from the discharge port 36 does not flow backward toward the induction air passage 35 located between the opposite sides of the Karino 24. Therefore, it is possible to prevent the wind flowing backward from swirling or accumulating rice in the front part of the sorting air path P.

Further, since the rectifier 37 is formed in the shape of a triangular prism projecting rearward, the rectifying members 37 are arranged side by side.
4 is guided by the inclined surfaces 37a, 37a of the rectifier 37 and merges at the protruding ends protruding rearward. A uniform wind speed distribution can be obtained.

[0015] Since the straightening body 37 is formed with an air suction portion 39 in which the lower wall of the air passage is cut out,
Even if the central front part of the sorting air path P is closed by the rectifier 37, the air is sucked into the induction air path 35 from the air suction part 39. The wind is sucked from the front and rear of the induction air path 35,
It is possible to sufficiently secure the air volume of Karino 24.

In the case where the bell mouth 40 is provided on the side surface of the Karino 24, the circular suction port 41 guides and sucks the wind, so that the wind power is increased as compared with the conventional square suction port. can do. Moreover, since the bell mouth 40 is divided and removed from the position of the center line, interference with the blower blade 31 is eliminated, so that the drive shaft 30 can be easily attached and detached during maintenance and inspection work or the like.

[0017]

In summary, the present invention is directed to a threshing machine in which a sorting air passage is formed rearward by blowing air from blowing fans arranged side by side in a left and right direction. The central front part is closed with a straightening body that projects backward, and the lower wall of the air passage below the straightening body is cut off to provide an air suction part for the blower fan. A straightening body that blocks the front of the center of the air passage makes the air flow from the side-by-side blower fan a uniform wind speed distribution, so that the wind reverses and swirls, or paddy accumulates in the front of the sorting air passage Can be prevented.

In addition, since the air is sucked into the blower fan from the air suction portion in which the lower wall of the air passage below the straightener is cut off, even if the center of the selected airflow passage is blocked by the straightener, the airflow of the blower fan is reduced. Can be secured.

[Brief description of the drawings]

FIG. 1 is an overall side view of a threshing machine.

FIG. 2 is a plan sectional view of a blower fan.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a top view of a sorting air passage.

FIG. 5 is a top view of a conventional sorting wind path.

FIG. 6 is a side view of (1) a bell mouth. (2) It is a top view same as the above. (3) It is a side view of the upper half part divided same as the above.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Threshing machine 24 Blower fan 37 Rectifier 39 Air suction unit P Sorting air path

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toru Itamochi 667, Iya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F-term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B095 AA01 AA02 AA12 BB37 CA03 CB06

Claims (1)

[Claims] 1. A threshing machine in which a sorting air passage is formed rearward by blowing air from blowing fans arranged side by side on the left and right,
A central front portion of the sorting air passage is closed between the juxtaposed blowers by a straightening body projecting rearward, and a lower wall of the air passage below the straightening body is cut off to form an air suction portion to the blowing fan. A blower fan for a threshing machine.