JP2014014278A - Dpf installation structure for combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DPF installation structure for combine harvester that allows efficient heating of outside air and efficient cooling of an exhaust pipe of a DPF by outside air with the use of an inlet cover for covering of an inlet port and a middle part of the exhaust pipe.SOLUTION: In a DPF installation structure for combine harvester in which exhaust gas is discharged from a DPF 26 via an exhaust pipe 27, in order to discharge exhaust gas at the back of a traveling machine base 4 by passing the exhaust pipe 27 through a space between a threshing part 6 and a grain tank, a middle part of the exhaust pipe 27 is disposed to face an inlet port 31 of a blower fan 30 that is arranged by opening a front lower area of a side wall 6b of the threshing part 6 and blows screening air into the threshing part 6 by sucking air from an engine 11, and the inlet port 31 and the middle part of the exhaust pipe 27 are covered from sides by inlet covers 27a, 27b and 28c in a space against the threshing part 6 while forming an inlet path 31a that is opened in a front part and a lower part and communicates with the inlet port 31.

Description

  The present invention relates to a DPF installation structure for a combine.

  Conventionally, a threshing unit on the traveling machine stand behind the pre-processing unit, an engine surrounded by an operation unit and an engine cover, and a combine with a Glen tank arranged on the left and right are discharged from the engine by a PF attached to the upper left side of the engine. The particulate matter contained in the exhaust gas to be removed is removed, and the exhaust gas in a high temperature state that has been purified is discharged through the exhaust pipe toward the lower part of the space formed between the threshing part and the glen tank. It is already known that a DPF device is installed in the system (for example, see Patent Document 1).

JP 2010-216336 A

  The DPF installation structure of the combine shown in the above-mentioned Patent Document 1 is a tang fan that is disposed in the lower rear portion of the exhaust gas after the exhaust gas is purified by the DPF on the upper left side of the engine via the exhaust pipe. Since it exhausts back through the lower part of the (air blower fan), there is an advantage that the sorting air etc. of the threshing part is heated by the heated high-temperature exhaust pipe, and the harvesting workability of the wet material is improved. However, in this DPF installation structure, since the exhaust pipe is extended between the threshing part and the Glen tank, the fallen objects such as sawdust and dust that fall into the space part from above are entered. However, there is a drawback in that the exhaust pipe contacts or deposits on the exhaust pipe heated in a high temperature state and is heated by the exhaust pipe at a high temperature. In addition, the exhaust pipe passes through the vicinity of the tang fan while the surroundings are widely open, so it is difficult to cool the exhaust pipe efficiently and cool down by the outside air sucked by the tang fan, and the sorting wind sucked by the tang fan There are problems such as insufficient heating.

In order to solve the above-mentioned problems, the present invention firstly includes an engine 11 surrounded by a threshing unit 6 on the left side of a traveling machine base 4 having a pre-processing unit 5 at the front, and a driving unit 7 and an engine cover 10 on the right side. In addition, in the combine 1 in which the Glen tank 8 is disposed, a DPF 26 for removing particulate matter contained in the exhaust gas is provided at the upper left side of the engine 11, and the exhaust gas is discharged from the DPF 26 toward the rear lower part through the exhaust pipe 27. In the combine DPF installation structure,
The exhaust pipe 27 is passed through a space formed between the threshing part 6 and the grain tank 8, and the exhaust port 27 a is positioned at the rear part of the traveling machine base 4 to exhaust the exhaust gas. 6b is opened at the front lower part of the engine 11 and sucks air from the engine 11 side and blows the sorting air into the threshing portion 6 with the midway portion of the exhaust pipe 27 facing the intake port 31 of the blower fan 30, and the intake port 31 and the exhaust pipe. 27 is formed between the threshing portion 6 and the midway portion 27 with the threshing portion 6 by the air intake cover 28 so as to cover the air passage 31a that opens to the front portion and the lower portion and communicates with the air inlet 31 from the side.
Secondly, a vertical exhaust pipe portion 27b that vertically hangs from the DPF 26 in the middle of the exhaust pipe 27 facing the intake port 31 and a lower end of the vertical exhaust pipe portion 27b. Is formed by a lateral exhaust pipe portion 27c that extends so as to face the lower portion of the intake port 31.

According to the first aspect of the present invention, the exhaust located from the DPF installed at the upper left part of the engine through the exhaust pipe and through the space formed between the threshing part and the Glen tank to the rear part of the traveling machine base. In order to exhaust the exhaust gas from the mouth, the middle part of the exhaust pipe is exposed to the air inlet of the blower fan that is opened in the front lower part of the side wall of the threshing part and sucks in from the engine side and blows the selected wind in the threshing part The air intake cover and the middle part of the exhaust pipe are covered with the air intake cover between the threshing portion and the air intake passage that opens to the front and the bottom and communicates with the air intake port. Covering the midway of the air intake and the exhaust pipe, while the outside air is efficiently warmed by the exhaust pipe in the cover, heated air is sucked in from the air intake by the blower fan and supplied to the threshing section as a warmed sorting wind. It is possible to further improve the harvesting against. In addition, the air intake cover prevents the falling objects such as dust and the exhaust pipe from contacting each other, efficiently cools the middle part of the exhaust pipe facing the air inlet by outside air, and cools the rear exhaust pipe on the downstream side of the exhaust at a low temperature. Can be maintained in a state.
According to the second aspect of the present invention, the vertical exhaust pipe portion that vertically hangs the middle portion of the exhaust pipe facing the intake port from the DPF in front of the intake port, and the lower end of the vertical exhaust pipe portion The pipe length on the exhaust upstream side of the exhaust pipe in the intake cover is increased by forming the side exhaust pipe with the horizontal exhaust pipe part extending toward the lower part of the intake port. Therefore, contact with the outside air can be further promoted, and the pipe cooling efficiency and the heating efficiency of the sorting air can be increased. In addition, exhaust gas that has been sufficiently cooled can be discharged from the exhaust port at the rear of the traveling machine base, while lowering the temperature of the rear exhaust pipe that is long and exposed from the intake cover to the rear part of the traveling machine base.

It is a left view of a combine. It is a side view which shows the principal part of the DPF installation structure of a combine. It is a rear view of the DPF installation structure of a combine. It is a perspective view which shows the DPF installation structure of a combine partly broken. It is sectional drawing which shows the structure of the wheel installed in the traveling apparatus of a combine.

  Embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a combine provided with a DPF device 2 installation structure (hereinafter simply referred to as a DPF installation structure) according to the present invention. This combine 1 arrange | positions working parts, such as the pre-processing part 5 and the threshing part 6, in the front-back direction like the conventional thing on the traveling machine stand 4 which has the crawler type traveling apparatus 3, and the right side of the threshing part 6 An operation unit 7 and a Glen tank 8 are arranged. The driver's seat 9 of the driver 7 is installed on the traveling machine base 4 on an engine cover 10 configured in a box frame shape. The engine cover 10 is attached to a cover frame 10 a erected from the traveling machine base 4 so as to form a cooling air passage and surround the engine 11 mounted on the traveling machine base 4.

  As shown in FIG. 5, the traveling device 3 includes a pair of left and right rolling wheels 3b disposed along the front-rear direction on the lower side of the traveling frame 3a, and the rolling wheels 3b are detachably attached to both ends. Maintenance work such as refueling can be easily performed via a shaft cylinder 3d that rotatably supports the roller shaft 3c. That is, the shaft cylinder 3d is a square pipe having a square or hexagonal outer peripheral section, and has an oil supply port 3e for supplying lubricating oil to the left and right metal portions. In addition, a square pipe 3f having a square hole that allows the shaft cylinder 3d to be inserted into the wheel mounting position of the traveling frame 3a is provided. Thus, when refueling the shaft cylinder 3d of the traveling device 3, the shaft cylinder 3d can be easily pulled out from the square pipe 3f toward the other side by removing one of the wheels 3b shown in FIG. it can. As a result, after refueling the metal part through the refueling port 3e, the shaft cylinder 3d is inserted into the square pipe 3f by the reverse operation, and the removed wheel 3b is attached to the wheel shaft 3c. It is possible to perform the maintenance work efficiently and easily.

  The combine 1 having the above configuration supplies the cereals harvested by the pretreatment unit 5 to the threshing unit 6, and the grains that have been threshed and sorted by the threshing unit 6 are put into the glen tank 8 from the upper part by an unillustrated milling cylinder. Supply and fill. Subsequently, the grain accommodated in the Glen tank 8 can be discharged out of the machine by operating the grain discharge auger 13 to perform a series of combine operations. The driving section 7 of the combine 1 includes a front driving panel section 7b standing in a lateral direction on the front side of the driving section floor 7a, and a left side of the driving section floor 7a and the driving seat 9 connected to the front driving panel section 7b. The side operation panel portion 7c erected in the front-rear direction is configured in an L shape in plan view. And the discharge auger operation part 15 which operates the grain discharge auger 13 grade | etc., Behind the driver's seat 9 is arrange | positioned.

The grain discharge auger 13 has a vertical auger 16 standing on the traveling machine base 4 at the rear part of the grain tank 8 and a horizontal auger 16 connected to the upper part of the vertical auger 16 via a turning and tilting mechanism 17. It consists of an auger 19. Then, the horizontal auger 19 can be swung and tilted via the swivel tilt mechanism 17 based on the operation of the discharge auger operation section 15, and the grain discharge at a desired position is performed by the rotation of the spirals incorporated in each.
The Glen tank 8 is a box-shaped tank having a square shape in plan view, and is formed in a funnel shape by an inclined bottom wall 20 (see FIG. 3) on the rear side (left side) of the machine body and an inclined bottom wall 20a on the right side. A grain transport auger 21 is mounted along the bottom of the Glen tank. The grain conveying auger 21 has a shaft rear end connected to the base of the vertical auger 16, and a driven pulley provided at the shaft front end is connected to be able to switch transmission by a belt transmission device provided with a tension clutch or the like.

  The Glen tank 8 has a rear wall 23 side attached to the vertical auger 16 so that the vertical axis can be rotated, and the belt transmission device is connected to the belt transmission device from the grain storage work position with the Glen tank 8 empty. In the released state, the maintenance work position can be changed to a position where the vertical auger 16 is opened sideways (right side) and the right side of the threshing portion 6 is largely released. In this maintenance work position, the front side of the Glen tank 8 pivots sideways with the vertical auger 16 as a fulcrum and moves away from the threshing unit 6 and the engine cover 10, so the threshing unit 6, various transmission mechanisms 6 a and the DPF device 2 are separated. It is exposed to form a work space sufficient for maintenance work such as inspection and repair or cleaning. In addition, an air inlet 31 of a blower fan 30 (described later) installed below the front part of the threshing unit 6 is opened in the space part and faces the side wall (right threshing part machine wall) 6b. The transmission mechanism 6a is disposed along 6b. The transmission mechanism 6a rotates the rotating fan 30a of the blower fan 30 through a fan pulley 30b by belt transmission, and also allows transmission of rotation shafts of respective parts (not shown) such as the threshing unit 6 and the Glen tank 8.

  In the configuration of the combine 1, the DPF device 2 is installed in a space formed below the gap between the engine 11 and the grain tank 8 and the threshing portion 6, as shown in FIGS. 2 to 4. The DPF device 2 includes a DPF 26 connected to the exhaust manifold 25 of the engine 11, an exhaust pipe 27 connected to the exhaust port of the DPF 26, a box-shaped intake cover 28 that covers the middle part of the exhaust pipe 27, and the like. Become. That is, the DPF 26 used in the present embodiment has a filter structure similar to a commercially available diesel particulate removing device used in trucks, tractors, etc., and is connected to the exhaust manifold 25 instead of the conventional engine muffler. In addition, it is mounted on the left side at the upper part of the engine 11 via the support member 11a, and burns while adhering particulate matter contained in the exhaust gas to the internal filter, thereby discharging clean exhaust gas.

  In addition, the DPF 26 is attached to the cover frame 10a that is erected so as to surround the engine 11 from the traveling machine base 4 in an attached state that is positioned at the front part of the threshing part 6 in a side view. The sides are covered. Note that the operation unit 7 of the combine 1 has a regeneration mode switch (not shown) for forcibly rotating the engine 11 at any time, and when the engine 11 is idling, the regeneration mode switch. Since the engine 11 is controlled to the rated speed by operating the exhaust gas, the particulate matter adhering to the filter is burned at any time by raising the temperature in the DPF 26 with the high-temperature exhaust gas, thereby preventing the filter from being clogged and purifying the exhaust gas. The performance is maintained.

  The exhaust pipe 27 extends from the DPF 26 toward the rear lower part. When the exhaust port 27a is installed at the center of the left and right traveling devices 3 at the rear of the traveling machine base 4, the exhaust pipe 27 is disposed upstream of the DPF 26 from the DPF 26. The vertical exhaust pipe portion 27b that is vertical when viewed from the side and the lower portion of the vertical exhaust pipe portion 27b are bent rearward so as to be substantially parallel to the traveling machine base 4. The horizontal exhaust pipe portion 27c to be formed is formed. At this time, as shown in FIGS. 2 to 4, the lateral exhaust pipe portion 27 c is disposed on the right side of the transmission mechanism 6 a with respect to the lower side portion of the intake port 31 opening in the side wall 6 b of the threshing portion 6. doing. For this reason, the exhaust pipe 27 inclines the vertical exhaust pipe portion 27b from the DPF 26 toward the right side in the rear view (FIG. 3), and the rear exhaust pipe 27d extending from the lateral exhaust pipe portion 27c to the rear exhaust port 27a. Are bent from the end of the horizontal exhaust pipe portion 27c toward the lower left side.

  In the structure of the exhaust pipe 27, the intake cover 28 is integrally extended from the side cover 28a, the side cover 28a covering the side of the intake port 31 and the side exhaust pipe portion 27c and the intake port 31, and the side wall. A cover main body is formed which includes an upper cover portion 28b that is close to 6b. In addition, a configuration in which a front cover portion 28c that covers the vertical exhaust pipe portion 27b from the rear is formed upward is added to the front portion of the cover body. The lower portion of the lateral cover portion 28a is detachably attached to the traveling machine base 4, and the intake cover 28 can be easily removed in the maintenance work posture of the glen tank 8. Therefore, by removing the intake cover 28, the rear side of the DPF 26, the intake port 31, and the side of the transmission mechanism 6a can be widely opened.

  With this configuration, the intake cover 28 forms a cover space (intake space) with a size that covers the lateral exhaust pipe portion 27 and the intake port 31, covers at least the sides and upper sides of both, and opens the lower and front sides. ing. Thus, during the combine work, the intake air to the intake port 31 accompanying the rotation of the blower fan 30 can be sufficiently performed from below and front of the middle part of the traveling machine base 4 without worrying about the suction of dust. In addition, since the rear and sides are closed to restrict the intake air, it is possible to prevent inhalation of dust or dust that falls or floats on this portion. Further, when there is dust or the like that enters through the gap between the threshing unit 6 and the Glen tank 8 and falls, the dust slides down along the intake cover 28 and is discharged outside the machine. Further, since the upper cover portion 28b is at a position where it is cooled sufficiently away from the side exhaust pipe portion 27c across the intake port 31, even if dust is placed on the upper cover portion 28b, it is heated at a high temperature. There is a feature such as never.

  The combine 1 provided with the DPF device 2 configured as described above performs the combine operation by simultaneously cutting and threshing the engine 11 at the rated rotation in the high rotation range. In this case, the combine 1 has the DPF device 2 installed on the upper left side of the engine 11 and the exhaust pipe 27 from the DPF 26 through the space formed between the threshing section 6 and the glen tank 8. Exhaust gas is discharged from the exhaust port 27a located at the rear. At this time, since the DPF 26 is directly supplied with high-temperature exhaust gas from the engine 11 via the exhaust manifold 25, the particulate matter can be efficiently combusted at high temperature, and the purified exhaust gas is sent to the exhaust pipe 27. Discharge.

  Then, with the midway part of the exhaust pipe 27 facing the intake port 31 of the blower fan 30, the intake path that opens to the front part and the lower part by the intake cover 28 between the threshing part 6 and communicates with the intake port 31. By forming 31a and covering from the side, the blower fan 30 can suck outside air (air) free from mixing of engine cooling air and dust from the engine 11 side and the lower part of the abdomen through the intake passage 31a. Moreover, it is not hindered by dust such as sawdust falling from the gap between the threshing section 6 and the Glen tank 8.

  That is, the air intake cover 28 receives dust falling from the gap on the cover surface and slides it down to prevent entry into the air intake port 31 to prevent falling objects from adhering to the side of the air intake port 31 in the cover. The exhaust pipe 27 can be routed while facing the middle. As a result, the air intake fan 28 sucks the heated air from the air intake port 31 in order to efficiently heat the outside air introduced from the air intake passage 31a by the middle portion of the exhaust pipe 27 heated at a high temperature. It can supply in the threshing part 6 as a warming selection wind. In addition to direct drying in contact with the threshing, this heated sorting wind heats the entire inside of the threshing unit 6 and maintains a high-temperature atmosphere. Threshing performance is improved by suppressing internal adhesion of dust and the like.

  Further, in the intake cover 28, the middle portion of the exhaust pipe 27 facing the intake port 31 is forcibly and efficiently cooled by the outside air flowing in a certain direction from the intake passage 31a, so that the rear exhaust pipe on the exhaust downstream side. 27d is maintained at a low temperature. Further, as shown in the example of the drawing, the exhaust pipe 27 has a vertical exhaust pipe portion 27b that is vertically suspended from the DPF 26 so that the middle portion of the exhaust pipe 27 faces the intake port 31, and is positioned in front of the intake port 31. Further, it is desirable to form the horizontal exhaust pipe portion 27 by bending the lower portion rearward and extend the rear exhaust portion 27 so as to face the lower portion of the intake port 31.

  That is, in this case, the pipe length on the exhaust upstream side of the exhaust pipe 27 in the intake cover 28 can be increased, so that the contact with the outside air can be further promoted to increase the pipe cooling efficiency. Therefore, it is possible to lower the temperature of the rear exhaust pipe 27d that is long and piped in an exposed state from the intake cover 28 to the rear part of the traveling machine base 4, and also promotes the lowering of the exhaust gas by the long rear pipe 27d that is piped long. The exhaust gas cooled to about 200 ° C. can be discharged from the exhaust port 27a. Moreover, since the temperature of the air sucked by the blower fan 30 can be increased at the same time, the harvesting workability for the wet material can be further improved.

DESCRIPTION OF SYMBOLS 1 Combine 2 DPF apparatus 5 Pre-processing part 4 Traveling machine stand 6 Threshing part 6b Side wall 7 Operation part 8 Glen tank 10 Engine cover 11 Engine 26 DPF
27 Exhaust pipe 27a Exhaust port 27b Vertical exhaust pipe portion 27c Horizontal exhaust pipe portion 28 Intake cover 30 Blower fan 31 Intake port 31a Intake passage

Claims (2)

The threshing section (6) on the left side of the traveling machine base (4) provided with the preprocessing section (5) at the front, the engine (11) and the glen tank surrounded by the driving section (7) and the engine cover (10) on the right In the combine (1) in which (8) is disposed, a DPF (26) for removing particulate matter contained in the exhaust gas is provided on the upper left side of the engine (11), and the exhaust gas is discharged from the DPF (26) to the exhaust pipe (27 In the DPF installation structure of the combine that discharges toward the lower rear via
The exhaust pipe (27) is passed through a space formed between the threshing section (6) and the Glen tank (8), and the exhaust port (27a) is positioned at the rear part of the traveling machine base (4) to discharge the exhaust gas. The air inlet of the blower fan (30) that is opened at the front lower part of the side wall (6b) of the threshing part (6) and sucks air from the engine (11) side to blow the selected wind into the threshing part (6). (31) with the midway part of the exhaust pipe (27) facing, and the midway part of the air intake (31) and the exhaust pipe (27) between the threshing part (6) by the air intake cover (28) A DPF installation structure for a combine, characterized in that an intake passage (31a) that opens to the front and lower portions and communicates with the intake port (31) is formed and covered from the side.   A longitudinal exhaust pipe portion (27b) vertically extending vertically from the DPF (26) to the front of the intake port (31) with a midway portion of the exhaust pipe (27) facing the intake port (31); The combine according to claim 1, wherein the vertical exhaust pipe part (27b) is formed by a lateral exhaust pipe part (27c) extending toward a lower part of the intake port (31) by bending the lower end of the vertical exhaust pipe part (27b) rearward. DPF installation structure.

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