JP3380971B2 - Airflow type dust remover - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes dust adhering to a dust screen at a cooling air inlet of an engine used for a mobile agricultural machine such as a combine. The present invention relates to an airflow type dust remover. 2. Description of the Related Art As a dust removing apparatus of this kind, for example, an opening end of a dust removing pipe is made to face a flow passage of an engine cooling wind, and a suction fan is used to suck the air into the flow passage. There is a dust removing means using an engine cooling air for sucking and removing dust adhering to a dust removing screen or the like from an opening end on the other side. [0003] However, in such a means, usually, the opening end of one side of the dust removal tube faces substantially orthogonally in the flow path of the cooling air, and the opening end face is formed. Is formed on a vertical end face cut substantially perpendicularly to the longitudinal direction of the dust removal tube, so that the suction area of the suction air of the dust removal tube formed at the open end is small and a sufficient dust removal effect cannot be expected. Was. Therefore, there is a wind direction guide plate provided on the upstream side of the air at the opening end to increase the suction wind speed of the dust removing tube to promote the suction of air into the dust removing tube, but the structure becomes complicated. One was not effective. SUMMARY OF THE INVENTION Accordingly, the present invention has one opening end of a dust removing tube facing a flow passage of air by a suction fan, and forcibly discharges dust sucked from the other opening end. In the dust removing device, the opening end of the dust removing tube that faces substantially orthogonally in the air flow passage is formed on an inclined end surface having an acute angle from the upstream side to the downstream side of the air flow, and the dust removing tube faces the air flow passage. By increasing the opening area of the filter, the suction wind speed of the dust removal tube sucked into the flow passage is increased, the dust removal efficiency can be improved by extremely simple means, and the engine performance and the like can be stably maintained. An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view of a dust-exhaust tube exhaust port, FIG. 2 is a side view of the whole, and FIG. 3 is a plan view of the same, wherein (1) shows a traveling crawler (2) mounted on a track frame (3). Machine,
(4) is a threshing unit equipped with an axial flow type screw-type handling cylinder (5), a processing cylinder (6), a sorting mechanism (7), etc., and mounted on the machine base (1); A grain tank for storing the grains of the threshing unit (4) which is taken out through the cylinder (9), (1
0) is a hydraulic cylinder (1) in front of the lower part of the threshing unit (4).
(1) a mowing unit mounted so as to be able to move up and down, (12) an operation cabin provided with a driver's seat (13) and an operation operation unit (14) and arranged in front of the grain tank (8);
Reference numeral 5) denotes an engine unit provided behind the grain tank (8) and having an engine (16) provided therein, and (17) denotes a grain discharge auger for taking out grains in the grain tank (8). The cutting section (10) is connected to a grain cutting header (18) for taking in uncut grain culm and substantially at the center of the rear part of the header (18) to transfer the cut grain culm to the threshing section (4). It is constituted by a feeder house (19) for feeding, and also includes a reel (20) for scraping uncut culms, first and second reciprocating drive type first and second cutting blades (21) and (22), and an auger for grain culling ( 23) is provided on the grain header (18), and the harvested culm taken into the header (18) is provided inside the feeder house (19).
It is configured to be fed to the threshing unit (4) via 4) for threshing. A second reduction cylinder (25) is provided on the right outside of the threshing unit (4), and the second processed product is returned to the threshing unit (4) via the processing cylinder (6) to rethresh. And to be re-sorted. As shown in FIGS. 4 to 8, an engine (16) for driving a threshing unit (4) and the like, and the engine (1)
6) The engine radiator (26) for cooling the combustion chamber and the sirocco fan (27) for cooling the radiator are provided vertically separated from each other, and the rear output shaft of the engine (16) on the flywheel (28) side. (16a) is linked to a counter shaft (30) supported by a bearing (29) on the rear side of the engine (16) via a universal joint shaft (31),
Threshing input shaft (32) for transmitting driving force to handling cylinder (5)
And the input shaft (34) of the continuously variable transmission (HST) (33)
And the counter shaft (30) is linked to the input shaft (36) of the lower discharge auger (35) of the grain tank (8) via each belt transmission mechanism (37) (38) (39),
Threshing parts and traveling crawlers (2) and grain tanks (8)
, Respectively. Further, belts (40) and (41) are provided on the front output side (16b) of the engine (16) on the side opposite to the flywheel.
The fan shaft (42) of the sirocco fan (27) is operatively connected to the sirocco fan (27) via a radiator (26).
A fan casing (44) for covering between the exhaust sides of
A cooling air exhaust passage (45) is formed between the case (43) and the casing (44), and the cooling air exhaust air passages (46) and (46) are opened on both front and rear sides of the fan case (43). The radiator (26) in the (45) takes in the air after cooling, and the excess space (48) between the engine room (47) in which the engine (16) is installed and the threshing unit (4) on the left side. , Facing the fan case (4
3) With the air outlet (49) facing, the suction port (46)
From (46), the air taken into the fan case (43) is discharged to the surplus space (48). [0010] Further, on the front side (right side) of the radiator (26), there is provided an air passage casing (51) having an outside air intake (50) at a front portion thereof, and an oil cooler used for the transmission mechanism (33). (52) The casing (51)
And a rotary screen (53) for dust prevention is provided at the outside air inlet (50), and the oil cooler (5) is provided by the screen (53) by clean air after dust removal.
2) and the radiator (26) is configured to be cooled. The screen (53) is attached to an engine room cover (55) which is openably and closably supported on a fuselage side via a fulcrum shaft (54), and a center support shaft (57) of the screen (53) via a support frame (56). ), The outer and inner rollers (58) pressing the bent peripheral portion (53a) of the screen (53) from the outer and inner peripheral sides.
(59) is pivotably supported on an arm support shaft (62) of the support frame (56) via each roller arm (60) (61), and each arm (60) (61) is connected to the frame (5).
6) Roller pressure contact springs (63) and (64) are stretched between
The screen (53) is configured to be rotated by a screen rotation motor (65) that is drivingly connected to the circumscribed roller (58). Also, a cylindrical dust removing body (6) having a radial opening (66) on the surface of the screen (53).
7) is fixedly supported on the room cover (55), and the mouth body (67) and the exhaust side of the fan case (43) are connected to each other through a dust pipe (68) made of a round pipe to connect the sirocco. Dust and the like adhering to the screen surface are sucked into the dust removal port body (67) by the exhaust air suction force of the fan (27) to remove dust from the screen (53). Further, a pre-cleaner (70) of an air cleaner (69) for taking combustion air into the engine (16).
And a tail pipe (72) of a muffler (71) for discharging exhaust gas after combustion are connected to the upper wall (1) of the engine section (15).
5a) Projecting outward from the engine (16)
Tail pipe (72) from the left front side of the upper wall (15
a) A vertical discharge auger (73) of the discharge auger (17) which projects upward and penetrates the engine section (15) in the vertical direction.
The rear end of the pipe (72) is extended rearward so as to be along the upper wall (15a) at a position below the discharge auger (17) and on the left side of the body, and the exhaust port is inclined rearward and downward at the rearmost end of the body. (7
2a), the pre-cleaner (70) is disposed at a position in front of the vertical discharge auger (73), and the pre-cleaner (70) and the tail pipe (72) are turned when the discharge auger (17) turns. It is configured so as not to hinder turning. As shown in FIGS. 1 and 9, the dust removing pipe (68) has one open end forming a dust outlet (75) in a fan case (43) and an air flow passage (74) on the exhaust side. At about 90 ° perpendicular to the air flow (A), and the opening end of the dust removing pipe (68) is directed toward the downstream side from the upstream side of the air flow (A) by an acute angle (α). ) Is formed on the inclined end face (68a) to enlarge the opening area of the dust outlet (75) and reduce the wind speed in the dust pipe (68) to the wind speed at the conventional vertical end face (about 5 m / s) approximately twice (approximately 1)
1 m / s) so as to greatly improve the dust suction efficiency. As shown in FIG. 10, an emergency engine stop switch (76) and an infrared signal from a remote control panel (77) are received at the grain discharge port (17a) at the tip of the discharge auger (17). And a receiver (78) for rotating the discharge auger (17) left / right and up / down, and a vehicle speed control mechanism (81) via a push-pull wire (80) together with a travel lever (79). ), The receiver (78) is connected via an electric cord (83) to the remote control panel (7).
7) The machine can be moved forward / backward, turning / stopping at a very low speed (about 0.1 m / s) by using this machine. It is configured to enable safe one-person work even from a remote position without performing. In this embodiment, the radiator (2) is arranged above the engine (16) with the above configuration.
6) and the sirocco fan (27) are arranged so that the radiator (26) and the sirocco fan (27) are separated from the engine (16), thereby minimizing the influence of hot air on the engine (16). The cooling of the radiator (26), which is suppressed to a low level, can be made possible, and the engine room (47) can be made substantially closed to reduce noise. Further, the exhaust air from the sirocco fan (27) is discharged downward to an excess space (48) between the engine room (47) and the threshing unit (4), thereby preventing the air from blowing out to the outside of the body. And combine work can be made favorable. Furthermore, the radiator (26) can be connected to the exhaust side of the fan case (43) through a dust removal pipe (68) by connecting the dust removal port body (67) through a dust removal pipe (68) without installing a separate dust removal fan or the like. It is possible to economically remove dust from the screen (53) by effectively using one sirocco fan (27) used for another purpose for cooling such as. Further, the exhaust port (7) of the dust removal pipe (68)
5) Since the end face is formed on the inclined end face (68a) to increase the area of the dust outlet (75), the pipe (6) is used.
8) In comparison with the conventional vertical end face which cuts the mouth end face at a substantially right angle to that of the conventional vertical end face, the suction air velocity in the pipe of the dust removing pipe (68) is about twice or more (about 5 m / s for the vertical end face, and substantially for the inclined end face). 11
m / s) to greatly improve the dust suction efficiency,
The engine performance can be stably maintained by reliably removing dust from the screen (53). A sirocco fan (2) is used as the suction fan.
Although the configuration using (7) has been described, any other centrifugal fan such as a cross-flow fan or an axial fan may be used. Further, the dust removing pipe (68) is made of a round pipe, but may have any shape such as a square. As is apparent from the above embodiments, the present invention is directed to the one side opening end of the dust removal pipe (68) in the air passage (74) by the suction fan (27). , In a dust removal device forcibly discharging dust sucked from the other side open end,
A dust removal tube (6) that faces substantially orthogonally in the air flow passage (74).
Since the open end of 8) is formed on the inclined end surface (68a) having an acute angle (α) from the upstream side to the downstream side of the air flow, the dust removal pipe (68) facing the air flow passage (74)
Of the dust pipe (68) sucked into the flow passage (74), the dust collection efficiency can be improved by extremely simple means, and the engine performance and the like can be improved. It has remarkable effects such as being able to maintain stability.

[Brief description of the drawings] FIG. 1 is an explanatory view of a dust removal tube dust outlet portion. FIG. 2 is an overall side view of the combine. FIG. 3 is an overall plan view of the combine. FIG. 4 is an explanatory rear view of the engine unit. FIG. 5 is an explanatory side view of the engine unit. FIG. 6 is an explanatory plan view of an engine unit. FIG. 7 is an explanatory side view of a radiator unit. FIG. 8 is an explanatory side view of a screen unit. FIG. 9 is an explanatory view of a dust removal tube dust outlet. FIG. 10 is an explanatory diagram of a discharge auger unit. [Explanation of symbols] (27) Sirocco fan (suction fan) (68) Dust removal tube (68a) Inclined end face (74) Flow passage (Α) acute angle

Claims (1)

(1) A dust removing device in which one opening end of a dust removing tube is made to face an air flow passage of a suction fan and dust sucked from another opening end is forcibly discharged. An air-flow type dust-removing device, wherein an opening end of a dust-removing tube that faces substantially orthogonally in an air flow passage is formed on an inclined end surface having an acute angle from the upstream side to the downstream side of the air flow.