JP2020029773A - Engine work machine - Google Patents

Abstract

To provide an engine work machine capable of improving cooling efficiency while keeping a noise level low.SOLUTION: The inside of a casing 13 is provided with: a first duct for guiding air sucked from an inlet port to the upper part of the casing; a second duct 21 for guiding air passing through the first duct toward a horizontal direction in the upper part of the casing; and an intake guide 23 for dividing air passing through the second duct into a plurality of flow channels in the upper part of the casing. The intake guide includes: a guide plate 25 for guiding downward a part of air flowing out from a bottom plate opening 13p of the second duct; and a third duct 26 provided on the plate surface of the guide plate and guiding the remainder of air flowing out from the bottom plate opening of the second duct toward the horizontal direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an engine working machine, and more particularly, to cooling and soundproofing of an engine working machine in which a working machine such as a generator, a compressor, a hydraulic unit, and a pump and an engine for driving the working machine are housed inside a casing. Regarding the structure.

  An engine working machine in which a working machine such as a generator and an engine for driving the working machine are housed in a casing generally has an intake duct inside an opening provided in an inspection door. Further, a soundproof structure is known in which a plurality of ducts are provided in a flow path between an intake duct and an intake port of an air cleaner so that noise of an engine or a working machine does not leak outside (for example, see Patent Document 1). .).

JP 2014-31719 A

  However, in the engine working machine described in Patent Document 1 described above, noise leaking to the outside from the intake port of the air cleaner is attenuated while passing through a path formed by a plurality of ducts, and thus a certain soundproof effect is obtained. However, due to its mounting structure, there is a limit to noise reduction. In addition, the cooling air sucked into the intake duct naturally flows inside the casing and then reaches the radiator.Therefore, the air temperature is higher than the outside air temperature, and the cooling effect of the engine is impaired. there were.

  Therefore, an object of the present invention is to provide an engine working machine capable of improving the cooling efficiency while keeping the noise level low.

  In order to achieve the above object, an engine working machine of the present invention accommodates a working machine and an engine for driving the working machine inside a casing, and includes a combustion side and a cooling side on a side plate portion of the casing. In an engine working machine having an air intake port for sucking air into a casing, a first duct that guides air sucked from the air intake port toward an upper portion of the casing is provided inside the casing, and the first duct passes through the first duct. A second duct for guiding the air flowing in the horizontal direction at the upper part of the casing, and an intake guide for dividing the air passing through the second duct into a plurality of flow paths at the upper part of the casing. A guide plate for guiding a portion of the air flowing out of the bottom plate opening of the second duct downward, and a guide plate provided on a plate surface of the guide plate, And a third duct for guiding the remainder of the air flowing out of the bottom plate opening in the horizontal direction, and the air guided downward by the guide plate is sucked into the combustion air intake port of the engine. And the air guided in the horizontal direction by the third duct becomes the cooling air supplied to the radiator of the engine.

  Further, the intake guide is provided on an upper portion of a stand surrounding the work machine, and an air cleaner having the combustion air intake port is arranged in a space between the stand and the third duct. The combustion air intake port is opened downward.

  Further, the stand is framed by an upper plate provided with the guide plate on an upper surface and a pair of support legs for supporting the upper plate, and the combustion is formed on both sides of the upper plate sandwiching the guide plate. It is characterized in that a combustion air inflow opening and a combustion air outflow opening through which the working air passes are provided.

  Further, the working machine is a generator formed having an intake port on one side of the housing and an exhaust port on the other side, and the exhaust device is provided between the pair of support legs in the stand. It is characterized in that a partition plate is provided for partitioning a flow path of exhaust air discharged from a mouth and a flow path of the combustion air.

  According to the present invention, the intake guide provided inside the casing guides a part of the air flowing out of the second duct downward by the guide plate and guides the remainder horizontally by the third duct. , While the guide plate and the third duct each function as a sound insulation plate, it is possible to directly supply fresh air having a temperature close to the outside air to the intake passage of the engine and the flow path toward the radiator. Cooling efficiency can be increased.

  Further, since the suction port provided in the air cleaner disposed in the space between the stand and the third duct is opened downward, the sound insulation function can be further enhanced. Further, since the combustion air inflow opening and the combustion air outflow opening are provided in the upper plate of the stand, it is possible to generate a flow that passes the combustion air through each of the openings and flows around the guide plate. Can be easily flowed without being interrupted on the way. In addition, since a partition plate is provided between the support legs of the stand to separate the exhaust air flow path of the generator and the combustion air flow path, it is possible to prevent the exhaust air from disturbing the flow of combustion air. In addition, the noise of the generator can be reduced.

It is a front view of the engine working machine which shows one form example of the present invention. It is II-II sectional drawing of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 1. It is a principal part expanded sectional front view of an engine working machine similarly.

  FIGS. 1 to 4 show an embodiment of an engine working machine according to the present invention. The engine working machine 11 has an upper left wall which is erected upward from four sides of a gantry 12 having a rectangular shape in plan view. 13a, an upper right side wall 13b, a control panel side wall 13c, and an exhaust chamber side wall 13d, and a ceiling member 13e covering an upper opening surrounded by a side plate portion composed of the respective side walls 13a, 13b, 13c, 13d. An engine 14 is disposed in the center of the formed casing 13 in the longitudinal direction (the left-right direction in FIG. 1), and one side of the engine 14 (the right side in FIG. 1) is a power generator, which is one of working machines. A radiator fan 16, a radiator (not shown), and an exhaust chamber 17 are disposed on the other side of the engine 14 (the left side in FIG. 1). An air cleaner 18 connected to the engine 14 via an intake pipe 18a is disposed above the casing 13.

  Of the side plates of the casing 13, the upper left side wall 13a and the upper right side wall 13b are provided with inspection doors 19, 20 for opening and closing inspection ports 13f, 13g for maintenance work of the engine 14, etc., respectively. The inspection doors 19 and 20 are provided with intake ports 19a and 20a for taking in cooling and combustion air into the casing 13, respectively. Inside the inspection doors 19 and 20, first air ducts 19b and 20b for guiding the air sucked from the air inlets 19a and 20a to the upper inside of the casing 13 and separating rainwater entrained by the air are provided respectively. Have been.

  Above the upper ends of the inspection ports 13f, 13g, and below the ceiling member 13e located above the generator 15, a partition wall 13h parallel to the upper left side wall 13a and the upper right side wall 13b is provided. A second duct 21 located above the first duct 19b on the upper left side wall 13a side is provided between the upper right side wall 13b and the partition wall 13h. A second duct 22 is provided above the first duct 20b on the wall 13b side.

  The second duct 21 on the upper left side wall 13a guides air in a horizontal direction by a ceiling member 13e, a partition wall 13h, a partition wall 13i provided on the upper left side wall 13a side, and a bottom plate 13j. The bottom plate 13j has an opening 13m communicating with the upper opening 19c of the first duct 19b on the upper left side wall 13a side. The second duct 22 on the upper right side wall 13b guides air in the horizontal direction by a ceiling member 13e, a partition wall 13h, a partition wall 13n provided on the upper right side wall 13b side, and a bottom plate 13j. The bottom plate 13j is formed with an opening 13o communicating with the upper opening 20c of the first duct 20b on the upper right side wall 13b side. The cross-sectional area of each of the ducts 19b, 20b, 21, 22 in the air flow direction is set according to the opening area of the air inlets 19a, 20a.

  Further, an opening 13p for guiding the air in the second ducts 21 and 22 to the intake guide 23 is provided at an intermediate portion between the opening 13m and the opening 13o in the bottom plate 13j. The intake guide 23 is provided on an upper portion of a stand 24 surrounding the generator 15, and guides a part of the air flowing out of the opening 13 p downward and a remaining part of the air flowing out of the opening 13 p. And a third duct 26 that guides in the horizontal direction.

  The guide plate 25 has a substantially square upright plate portion 25a parallel to the control panel side wall 13c and the exhaust chamber side wall 13d, and is disposed between the first ducts 19b and 20b. The upper plate 24a is provided on the upper plate 24a of the stand 24 with the upper end of the upright plate 25a being close to the opening 13p, bent in the direction of the side wall 13c to form the side plate 25b. The third duct 26 is configured such that both sides of the bottom plate 26a are bent upward to form a side plate portion 26b, and the upper end of the side plate portion 26b is aligned with the upper end of the upright plate portion 25a in the height direction. It is provided in a cantilever shape on the side plate surface. As a result, of the air flowing out of the opening 13p, the air guided downward by the guide plate 25 becomes the combustion air sucked into the combustion air suction port 18b provided in the air cleaner 18. On the other hand, the air guided in the horizontal direction by the third duct 26 becomes cooling air supplied to the radiator.

  The air cleaner 18 is arranged in a space above the stand 24 and below the third duct 26 avoiding above the high engine 14. The air cleaner 18 is installed so as to open the combustion air intake 18b downward with the upper part thereof attached to the lower surface of the bottom plate 26a of the third duct 26.

  The stand 24 is framed by an upper plate 24a provided with the guide plate 25 on the upper surface, and a pair of plate-like support legs 24b, 24b supporting the upper plate 24a. And an exhaust port 15b provided on the other side are integrally formed. Further, a combustion air inflow opening 24c and a combustion air outflow opening 24d through which combustion air passes are provided on both sides of the upper plate 24a in the longitudinal direction with the guide plate 25 interposed therebetween. Further, a partition plate 27 is provided inside the stand 24 along the edge 14e of the combustion air outflow opening 24d on the engine 14 side while being bridged between the support legs 24b, 24b. The partition plate 27 has a plate edge formed in an arc shape corresponding to the outer shape of the housing of the generator 15, and has a flow path for exhaust air radially discharged from the exhaust port 15b and a flow path for combustion air. It separates the road.

  In the engine working machine 11 formed in this manner, the air sucked into the intake ports 19a, 20a flows from the first ducts 19b, 20b to the upper openings 19c, 20c and the openings 13m, 13o as shown by the arrow A in FIG. Through the opening 13p of the bottom plate 13j of the second ducts 21 and 22, and is branched by the intake guide 23 and flows into the casing 13. Part of the air flowing out of the opening 13p is guided downward by the upright plate portion 25a and the side plate portion 25b of the guide plate 25, passes through the combustion air inflow opening 24c as combustion air, and enters the inside of the stand 24. Inflow. On the other hand, the remainder of the air flowing out of the opening 13p is guided in the horizontal direction by the bottom plate 26a and the side plate portion 26b of the third duct 26 as shown by an arrow B in FIGS. The engine coolant is sucked by the fan 16 and cooled by the radiator.

  Further, a part of the air flowing into the inside of the stand 24 from the combustion air inflow opening 24c is guided to the engine 14 at the upper part of the generator 15 as shown by an arrow A in FIG. Is drawn into the combustion air suction port 18b of the air cleaner 18 through the air opening 24d. On the other hand, the remainder of the air that has flowed into the inside of the stand 24 is sucked into the intake port 15a of the generator 15 and becomes cooling air, as shown by the arrow C in FIG. Further, the exhaust air discharged from the exhaust port 15b of the generator 15 is directed horizontally by the upper plate 24a of the stand 24, both support legs 24b, 24b, and the partition plate 27, as shown by an arrow D in FIG. And flows through the inside of the casing 13 in a direction toward the exhaust chamber 17.

  As described above, the intake guide 23 provided inside the casing 13 guides a part of the air flowing out of the second ducts 21 and 22 downward by the guide plate 25, and the remaining part is horizontally moved by the third duct 26. Since the guide plate 25 and the third duct 26 function as sound insulation plates, the guide plate 25 and the third duct 26 serve to direct fresh air close to the outside air temperature to the combustion air intake port 18b of the engine 14 and the flow path toward the radiator. It is possible to supply the fuel separately and directly, and the cooling efficiency of the engine 14 can be increased.

  Further, since the combustion air suction port 18b provided in the air cleaner disposed in the space between the stand 24 and the third duct 26 is opened downward, the sound insulation function can be further enhanced. Further, since the upper plate 24a of the stand 24 is provided with the opening 24c for combustion air inflow and the opening 24d for combustion air outflow, the combustion air passes through the respective openings 24c and 24d and goes around the guide plate 25. The flow can be generated, and the combustion air can be easily flowed without being interrupted on the way. Further, since the partition plate 27 is provided between the support legs 24b of the stand 24 and separates the flow path of the exhaust air from the generator 15 and the flow path of the combustion air, the exhaust air reduces the flow of the combustion air. The noise of the generator 15 can be reduced while preventing the disturbance.

  The present invention is not limited to the above embodiment, and the intake guide may have any shape as long as it can rectify the air flowing out of the second duct. The shape can be appropriately changed according to the conditions. In addition, the length and cross-sectional area of each duct can be appropriately set according to the state of the flow of air. Further, a configuration is possible in which the exhaust port of the generator is arranged downward and no partition plate is provided.

  11 engine working machine, 12 stand, 13 casing, 13a upper left wall, 13b upper right wall, 13c control panel side wall, 13d exhaust chamber side wall, 13e ceiling member, 13f, 13g Inspection port, 13h, 13i: Partition wall, 13j: Bottom plate, 13m: Opening, 13n: Partition wall, 13o, 13p: Opening, 14: Engine, 15: Generator, 15a: Inlet, 15b: Exhaust port, 16: Radiator fan, 17: exhaust chamber, 18: air cleaner, 18a: intake pipe, 18b: combustion air intake port, 19: inspection door, 19a: intake port, 19b: first duct, 19c: upper opening, 20: inspection Door, 20a: intake port, 20b: first duct, 20c: upper opening, 21, 22, second duct, 23: intake guide, 24: stand, 24a: upper plate, 24b: support leg, 24c: combustion Air inlet opening, 24d combustion air outlet opening, 24e edge, 25 guide plate, 25a upright plate portion, 25b side plate portion, 26 third duct, 26a bottom plate, 26b side plate portion, 27 ... Partition plate

Claims (4)

  In an engine working machine, a working machine and an engine for driving the working machine are housed inside a casing, and an intake port for sucking combustion and cooling air into the casing is provided on a side plate portion of the casing. A first duct for guiding air sucked from the air inlet into the casing toward the upper portion of the casing, and guiding the air passing through the first duct horizontally in the upper portion of the casing. A second duct, and an intake guide for dividing air passing through the second duct into a plurality of flow paths at an upper portion of the casing, wherein the intake guide is a part of air flowing out of a bottom plate opening of the second duct. And a guide plate for guiding the air downward, and the remaining portion of the air flowing out from the bottom plate opening of the second duct is horizontally directed while being provided on the plate surface of the guide plate. A third duct for guiding the air, the air guided downward by the guide plate becomes combustion air to be taken into a combustion air intake port of the engine, and the third duct moves in a horizontal direction by the third duct. An engine working machine, wherein the air guided toward the engine serves as cooling air supplied to a radiator of the engine.   The intake guide is provided on an upper portion of a stand surrounding the work machine, and an air cleaner having the combustion air intake port is arranged in a space between the stand and the third duct. 2. The engine working machine according to claim 1, wherein the air intake port is open downward.   The stand is framed by an upper plate having the guide plate provided on an upper surface thereof and a pair of support legs for supporting the upper plate, and the combustion air is provided on both sides of the upper plate sandwiching the guide plate. 3. The engine working machine according to claim 2, further comprising a combustion air inflow opening and a combustion air outflow opening through which the air flows.   The working machine is a generator formed with an intake port on one side of the housing and an exhaust port on the other side, and the generator is provided between the pair of support legs in the stand from the exhaust port. 4. The engine working machine according to claim 3, further comprising a partition plate for separating a flow path of the discharged exhaust air and a flow path of the combustion air.

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