JPH0889073A - Blade controller of crossflow fan - Google Patents

Abstract

PURPOSE: To delicately vary and effectively control the air quantity of a crossflow fan capable of blasting air for the collection and ejection of dust or the selection of grains e.g. in a head-feeding combine. CONSTITUTION: This crossflow fan is constructed of many blades 3 each having an arc cross section at a prescribed interval in an outer peripheral position between both revolving boards 2a revolving by a revolving axis. In the crossflow fan, fulcrum pins 4, 4 and rotating pins 5, 5 are respectively projected to horizontal outer directions on both end parts along the longitudinal direction of the arc from both end parts in a transverse direction of each blade 3, both rotating pins 5, 5 are inserted into arc long holes 6, 6 formed at the positions of both revolving boards 2a and the rotating pins 5, 5 projected from the arc long holes 6, 6 are engaged with both controlling blades 7a set in adjacent to outside of both revolving boards 2a and capable of controlling the rotation round a revolving axis 1.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention can be effectively adjusted so that the air flow rate of a cross-flow fan capable of sucking and discharging dust or blowing air for sorting can be gently changed by a self-removing combine or the like.

[0002]

2. Description of the Related Art Conventionally, in a cross-flow fan, a large number of blades having an arc-shaped cross section are arranged at predetermined intervals in an outer peripheral portion between both rotary plates which are rotated by a rotary shaft. As seen in Kaihei 6-61647, both lateral ends of each blade have a structure of being fixed to the inner side surfaces of both rotary plates, respectively. It is possible to adjust and adjust the air volume.

[0003]

However, in a cross-flow fan in which dust is sucked from the air intake port and discharged from the opposite side of the air intake port, an air volume adjusting plate is provided at the air intake port serving as the dust intake port. If so, when the air volume adjusting plate is adjusted to reduce the air volume, the flow rate of the air volume adjusting plate interferes with the flow of the dust-collected material, and the intake port becomes narrower, which lowers the dust-absorbing performance. Further, even if an air flow rate adjusting plate is provided at the outside air intake port on the lateral side of the cross flow fan, the structure of the fan becomes complicated and the strength becomes insufficient, and the suction force on the dust suction port side can always be effectively adjusted. However, there is a problem that it is not possible to adjust so that the change of the air volume becomes gentle.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem as a problem, and adjusts the inclination angles of all the blades constituting the fan to effectively adjust the air volume. In a cross-flow fan that is configured by arranging a number of blades with an arc-shaped cross section at predetermined intervals in the outer peripheral portion between both rotating plates rotated by a rotating shaft, an arc is formed from both lateral ends of each blade. A fulcrum pin and a pivot pin project laterally outward from both end portions of the rotary plate along the vertical direction, and the rotary pins are fitted and inserted into arcuate slots formed in the portions of both rotary plates. The rotating pins protruding from the arc-shaped elongated holes are fitted to both adjusting plates which are provided close to the outer side of the rotating plate and can be rotationally adjusted about the rotation axis.

[0005]

Therefore, by changing the inclination angle of each blade without changing the outer diameter of the fan, the air flow rate of the cross flow fan can be adjusted effectively so that the air flow rate can be changed gently without changing the rotation speed of the fan. be able to.

[0006]

EXAMPLE FIG. 2 is a side sectional view schematically showing a threshing machine to be mounted on a combine, in which an oscillating sorting body 11 is extended from below a handling room 10 containing a handling barrel 9 to the rear of the machine body.
A compressed air fan 12, a No. 1 spiral conveyor 13 and a No. 2 spiral conveyor 14 are arranged below the rocking sorting body 11, and a dust collecting unit is provided at the rear portion of the machine body in which a straw cutter device 15 is connected rearward. There is provided a fan chamber 16 whose mouth 16a is directed to the upper rear part of the swing selection body 11 and whose rear dust outlet 16b is directed to the lower rear side of the machine body. Although the cross flow fan A is axially mounted, both side plates 17a and 17b of the fan chamber 16 are provided with the dust suction port 16
a and the dust outlet 16b, both side surfaces are inflated outward so that the top plate 18 is provided above the fan chamber 16.
Is detachably attached and configured.

The cross-flow fan A includes both rotary plates 2a and 2a.
A large number of blades 3 having an arc-shaped cross section are arranged at predetermined intervals in the outer peripheral portion between b, and the boss 19 of one of the rotating plates 2a has a bearing 2 provided on the side plate 17a.
An input pulley 22 which is axially supported by 0 and carries a transmission belt 21 is fitted on the rotary shaft 1 fitted on the outer end, and the boss 23 of the other rotary plate 2b is a bearing 24 provided on the side plate 17b. The blades 3 are fitted to the rotary shaft 1a which is rotatably supported by the fulcrum, and the fulcrum pins 4 and 4 and the fulcrum pins 4 and 4 are attached to the blades 3 from the both ends in the lateral direction along the longitudinal direction of the arc. As shown in FIG. 1, longer rotating pins 5 and 5 are provided so as to project laterally outward, respectively, and the fulcrum pin 4 can be freely rotatably fitted to the outer peripheral edges of both rotating plates 2a and 2b. The round holes 25 that can be formed are respectively formed at predetermined intervals, and in the vicinity of each round hole 25, the rotary pin 5 is fitted and inserted while being closer to the rotary shafts 1 and 1a side than the round holes 25. Two
The circular arc elongated holes 6 which are concentric circular arcs of 5 centers are respectively formed and configured.

On both sides of the rotary plates 2a and 2b, two adjusting plates 7a and 7b which can be rotationally adjusted about the rotary shafts 1 and 1a.
The two adjusting plates 7a and 7b are fitted inside the side plates 17a and 17b, and the central bosses 26 and 27 are rotatably fitted to the bosses 19 and 23, respectively. The elongated holes 8 extending in the radial direction from the centers of the rotary shafts 1 and 1a are fitted to the outer peripheral portions of both the adjusting plates 7a and 7b by fitting the tips of the rotating pins 5 projecting from the circular arc elongated holes 6, respectively. Formed at intervals, both adjusting plates 7a, 7b
Is a guide pin 28 protruding from both rotary plates 7a and 7b.
The guide long holes 29, 29 into which the 28 are fitted are formed by being formed respectively.

Extending pieces 30 and 31 are respectively extended from a part of outer peripheral edges of the adjusting plates 7a and 7b, and arcuate elongated holes 32 are formed in the extending pieces 30 and 31, respectively.
Bolts 34 that fit into the arc-shaped elongated holes 32 are respectively extended from the support metal 33, 33 fixed to the outer surface of the outer peripheral edge portions of the two rotary plates 2a, 2b, and the tip ends of the bolts 34, 34 are respectively extended. The tightening nut 36 is screwed through the washer 35 so that both adjusting plates 7a and 7b can be rotationally adjusted.

Therefore, during operation, when the cross flow fan A rotates in the direction of arrow A, it sucks air from the dust suction port 16a as indicated by the arrow B and sucks dust, and is discharged from the dust discharge port 16b as indicated by the arrow C. It will be dusted with the wind.

When the performance of the cross flow fan A is adjusted according to the dry / wet condition of the grain to be shredded, the state of the third loss, or the efficiency of the threshing, the top plate 18 is opened and both rotary plates 2a, 2 are rotated.
When b is fixed, the tightening nuts 3b and 3b are loosened, and both adjusting pieces 7a and 7b are rotated in the same arrow D direction around the rotary shafts 1 and 1a while holding both extension pieces 30 and 31. While the rotating pins 5 and 5 at both ends of each blade 3 are pushed in the direction of arrow D by the inner edges of the elongated holes 8 of both the adjusting plates 7a and 7b, they are along the arcuate elongated holes 6 of the two rotating plates 2a and 2b. Will move in the slot 6, and there, the tightening nut 3
b and 3b will be tightened, but both adjustment plates 7a and 7b
By adjusting the rotation of all blades 3,
4, the inclination angle θ as shown in FIG. ₁ is changed to the inclination angle θ ₁ as shown in FIG. 6, and thus the fan outer diameter changes. By changing the inclination angle of each blade 3 without changing the air flow rate, the wind speed of the cross flow fan A can be adjusted so that the change in the air flow becomes gentle without changing the rotation speed of the fan.

It should be noted that the rotary shafts 1 and 1a may be a single rotary shaft, both adjusting plates 7a and 7b may be interlocked with each other so that they can be rotationally adjusted from one place, and one side plate. Part of 17a can be opened and closed freely, and then both adjusting plates 7
The rotation of a and 7b may be adjustable.

[0013]

As described above, according to the present invention, by changing the inclination angle θ of each blade 3 without changing the outer diameter of the fan, the rotation speed of the fan is not changed, and the change of the air flow is made gentle. The air flow rate of the air flow fan A can be effectively adjusted, and it has a feature that it can be preferably implemented with a simple structure without providing an air flow rate adjustment plate separately from the cross flow fan.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of an essential part of an embodiment of the present invention.

FIG. 2 is a side sectional view schematically showing a thresher.

FIG. 3 is a plan view showing a cross flow fan.

FIG. 4 is a side view showing a partially cutaway cross-flow fan.

5 is a cross-sectional view showing a cross section taken along line VV of FIG.

6 is an operation explanatory view shown in a part of FIG. 4. FIG.

[Explanation of symbols]

 1 rotating shaft 2a rotating plate 2b rotating plate 3 blade 4 fulcrum pin 5 rotating pin 6 arc long hole 7a adjusting plate 7b adjusting plate 8 long hole θ inclination angle A cross flow fan

Claims (1)

[Claims] 1. Both rotating plates 2 rotated by a rotating shaft 1.
In a cross-flow fan configured by arranging a number of blades 3 each having an arc-shaped cross section at predetermined intervals in an outer peripheral portion between a and 2b, in the longitudinal direction of the arc from both lateral ends of each blade 3. The fulcrum pins 4 and 4 and the turning pins 5 and 5 project laterally outward from both end portions of the arcuate slots 6 and 6 formed at the two rotary plates 2a and 2b, respectively. The arcuate lengths are provided on both adjusting plates 7a and 7b which are fitted with the rotating pins 5 and 5 and are provided close to the outer sides of the rotating plates 2a and 2b to adjust the rotation around the rotation shaft 1. Hole 6,
A blade adjusting device characterized in that the rotating pins 5 and 5 protruding from 6 are fitted together.