WO2004106710A1 - 建設機械のボトムガード,建設機械のエンジンルーム構造及び建設機械の冷却装置 - Google Patents
建設機械のボトムガード,建設機械のエンジンルーム構造及び建設機械の冷却装置 Download PDFInfo
- Publication number
- WO2004106710A1 WO2004106710A1 PCT/JP2004/007760 JP2004007760W WO2004106710A1 WO 2004106710 A1 WO2004106710 A1 WO 2004106710A1 JP 2004007760 W JP2004007760 W JP 2004007760W WO 2004106710 A1 WO2004106710 A1 WO 2004106710A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cooling
- cooling air
- engine room
- fan
- construction machine
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/08—Air inlets for cooling; Shutters or blinds therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/12—Filtering, cooling, or silencing cooling-air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P2001/005—Cooling engine rooms
Definitions
- the present invention relates to a bottom guard of a construction machine, which is attached to a bottom of a machine body facing an engine room, an engine room structure of the construction machine using the same, and a cooling device of the construction machine.
- FIG. 8 is a diagram showing the internal configuration of a general engine room, and is a schematic sectional view of the engine room as viewed from the front of the fuselage.
- equipment such as an engine 106 and a hydraulic pump 108 are provided in the upper revolving unit 102, and are generated by driving the hydraulic pump 108 by the engine 106.
- the working device 103 (see Fig. 7) is operated by the hydraulic pressure that has been applied.
- Construction machinery is generally used in harsh environments, such as rock excavation in dams, tunnels, rivers, and roads, and demolition of buildings and structures.
- engines 106 and hydraulic pumps are used.
- the load applied to devices such as 108 is high, which easily causes an increase in engine temperature and an increase in hydraulic oil temperature. Therefore, in these construction machines, as shown in FIG. 8, a fan 105 driven by an engine 106 is used.
- a cooling package 104 consisting of a relatively large-capacity radiator and oil cooler, etc., is provided in the flow path of the cooling air generated by the cooling air.
- the engine cooling water and hydraulic oil are cooled by the cooling package 104.
- the rotation of the fan 105 sucks external air (cooling air) from the upper openings 1109 and 110 of the radiator room 102A where the cooling package 104 is installed.
- the air passes through the core of the fin-shaped cooling package 104, it cools the engine cooling water and hydraulic oil.
- the main engine room 102B has an opening 111 on the upper surface and an opening on the lower surface at a predetermined distance from the fan 105 in the axial direction of the fan (left and right in Fig. 8). Units 1 1 and 2 are provided.
- the opening 111 on the upper surface is composed of a plurality of openings formed in a mesh shape, a looper shape, or the like, and is formed with a relatively large width in the axial direction of the fan.
- the lower opening 112 is formed as a single opening with a relatively large area, and is used to protect equipment in the main engine room 102B (for example, the oil pan 107). It is formed on a bottom guard 120 attached to the room floor.
- each of the openings 114 has a plurality of openings formed in a mesh shape or a louver shape.
- the high-temperature air that has cooled the engine cooling water and hydraulic oil is discharged to the outside through the exhaust openings 1 1 1 and 1 1 2 of the main engine room 102 B, or the main engine room. After passing through 102 B, it is discharged to the outside through the exhaust openings 1 13 and 1 14 in the pump room 102 C.
- the air flow discharged from the fan 105 has almost no component in the axial direction of the fan, but a component in the centrifugal direction and a component in the turning direction (hereinafter collectively referred to as a centrifugal turning direction component). ) Has been confirmed to be the main component.
- the space in which the radiator engine and the like can be mounted inside the upper revolving structure 102 is as shown in Fig. 9 (a), and is narrower than the space of other construction machinery as shown in Fig. 9 (b).
- its cross-sectional area cross section orthogonal to the fan axial flow direction
- the width of the engine room the length of the construction machine in the front-rear direction (captain)
- the longer the machine length the larger the turning radius at the rear end of the construction machine, making it inconvenient to use on narrow sites.
- the hydraulic shovel Because of the relatively small cross-sectional area, the hydraulic shovel requires a large cooling package 104 thickness (dimension in the direction in which the cooling air travels) to increase the contact area between the cooling package 104 and the cooling air, and consequently the cooling package.
- the cooling performance of J104 is ensured. As a result, the pressure resistance received when the cooling air passes through the cooling package 104 becomes relatively large.
- FIG. 10 is a schematic diagram showing a performance curve of a general axial flow fan.
- the performance curve L in the axial fan, generally, as the pressure loss ⁇ P on the upstream side of the fan increases, the fan air volume V per unit time tends to decrease. Since the fan air volume V is the amount of cooling air moving from the upstream of the fan to the downstream of the fan, the more the pressure loss ⁇ P on the upstream side of the fan increases, the more linear the flow from the upstream of the fan to the downstream of the fan. Axial flow is particularly difficult to obtain.
- the pressure loss ⁇ P on the upstream side of the fan is a predetermined value ⁇ .
- the flow of the cooling air is as shown in FIGS. 11 (a) and 11 (b), and the pressure loss ⁇ on the upstream side of the fan is a predetermined value ⁇ .
- the flow of cooling air is as shown in Figs. 12 (a) and 12 (b).
- Fig. 11 (a) and Fig. 12 (a) show only the lower side of the rotation center line CL of the fan blades, with the left and right directions coinciding with the fan axial flow direction.
- a relatively large air volume such as representatively shown by vector F E a fan upstream Axial flow is generated downstream of the fan, as shown by the vector F o, i, that is, the axial flow component vector F A , d is smaller than the centrifugal / swirl direction component vector F c , d. Dominant flow occurs. Then, the air volume increases toward the centrifugal side as indicated by the vector in Fig. 11 (b).
- the cooling package is thick in the hydraulic shovel, the pressure loss ⁇ P on the upstream side of the fan is large, and the cooling fan is used in the high pressure loss region. / The turning direction component becomes dominant.
- the exhaust opening 111 formed with a plurality of openings in a mesh shape is different from the fan 110 in the axial direction of the fan.
- the cooling air drawn into the main engine room 102B is discharged from the main engine room 102B until it is exhausted because it is arranged at a distance from 5 and has a width in the axial direction of the fan. Therefore, the flow in the axial flow direction is forced.
- this prior art has a structure in which air having a centrifugal Z-turning direction component as the main component of the flow flows in the axial flow direction, so that the pressure loss applied to the air is relatively large, and after passing through the cooling package 104. There is a problem that the air is not smoothly discharged (low discharge efficiency).
- Patent Document 2 discloses a construction machine as shown in FIG.
- cooling air passages fan air distribution passages, fan air distribution ducts 13 1 to 13 3 are provided on the upper surface and both side surfaces (front and rear surfaces of the vehicle body) of the engine room 130.
- the entrance of the air passage (the left end in Fig. 13) is located near the outer periphery of the cooling fan.
- Patent Document 2 shown in FIG. 13 has the following problems.
- the cooling air passages 131, 133 are provided on the side of the engine room 130, the cooling air passages 131, 133 are provided outside the engine room 130 as shown in Fig. 13 In such a case, it is necessary to work on the counterweight 140 or to provide a space on the working device 120 side, which may increase the size of the body and complicate the structure. It is conceivable to provide the cooling air passages 13 1, 13 3 on the side of the engine room 130 inside the engine room 130, but in this case, the engine room 130 increases.
- the outlets 13 3 a and 13 3 a of 13 3 are formed on the upper surface of the engine room 130 together with the outlet 13 2 a of the cooling air passage (duct) 13 2. Since the cooling air passages 13 1 to 13 3 have inlets close to the cooling fan and engine, which are the main noise sources, the cooling air passages 13 1 to 13 3 Noise is concentrated above the room 130, and loud noise may be locally generated.
- the present invention has been made in view of the above-described problems, and has been made to improve cooling air discharge efficiency and reduce noise while suppressing an increase in the size of a fuselage of a construction machine and complexity of the fuselage structure. It is another object of the present invention to provide a construction machine bottom guard, a construction machine engine room structure, and a construction machine cooling device. Disclosure of the invention
- a bottom guard of a construction machine is mounted on a bottom of the machine body facing an engine room through which a cooling air for cooling a cooling package by operating a cooling fan flows.
- a bottom guard body attached to the bottom of the fuselage so as to shield the inside of the engine room from the outside of the machine, and having a cooling air discharge opening; and attaching the bottom guard body to the bottom of the fuselage.
- a guide member mounted on the side facing the interior of the engine room in the state so as to cover the cooling air discharge opening, and guiding cooling air discharged from the cooling fan from the outer periphery of the cooling fan to the cooling air discharge opening. (Chart 1).
- a flow straightening plate is provided between the bottom guard body and the guide member along the axial flow direction (claim 2).
- the engine room structure of a construction machine according to the present invention is an engine room structure of a construction machine that houses an engine, a cooling package, and a cooling fan that circulates cooling air for cooling the cooling package, It is characterized by having a bottom guard for construction machinery (Claim 3).
- a cooling device for a construction machine according to the present invention includes: a cooling air passage provided in an engine room of the construction machine; and a cooling fan installed in the cooling air passage and flowing cooling air.
- a cooling device for a construction machine comprising a cooling package installed in the cooling air passage, wherein the cooling device is provided with the above-mentioned bottom guard (claim 4).
- the cooling air discharged in the centrifugal direction which occupies most of the cooling air discharged from the cooling fan, is guided to the outside of the machine by the guide member, so that the cooling air flows smoothly to the outside of the machine.
- the cooling air is efficiently discharged, and the cooling air discharge efficiency can be improved. As a result, it is possible to reduce the total opening area of the airframe for discharging the cooling air, and it is possible to reduce the noise as compared with the conventional case.
- the opening area for cooling air discharge provided especially on the upper surface of the fuselage can be reduced, and loud noise is locally generated on the upper surface of the fuselage body. It is possible to prevent the generation of noise, and it is possible to suppress the noise emitted vertically upward.
- the simple structure of the bottom guard with a guide member and the effective use of the existing space under the engine and oil pan allow the guide member to be arranged, so that the cooling air flows to the side of the engine room.
- the exhaust system it is possible to improve the efficiency of discharging the cooling air and reduce the noise as described above, while suppressing the increase in the size of the airframe and the complexity of the airframe structure.
- the engine sound transmitted to the outside through the ventilation formed by the guide member is absorbed by the guide member, and the engine sound that leaks out of the machine through the body body wall surface is transmitted to the guide member.
- the bottom guard double-shields the outside of the machine, reducing noise.
- FIG. 1 is a schematic perspective view showing the entire configuration of a construction machine according to one embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing the overall configuration of a cooling device for a construction machine as one embodiment of the present invention, as viewed from the front of the machine.
- FIG. 3 is a schematic side view showing the configuration of the upper swing body according to one embodiment of the present invention.
- FIG. 4 is a schematic perspective view showing a configuration of a bottom guard as one embodiment of the present invention.
- FIG. 5 is a schematic perspective view showing a configuration of an engine room discharge slot and a bulge according to one embodiment of the present invention.
- FIG. 6 is a schematic cross-sectional view showing the entire configuration of a modification of the cooling device for construction equipment as one embodiment of the present invention, as viewed from the front of the fuselage.
- FIG. 7 is a schematic perspective view showing the entire configuration of a conventional construction machine.
- FIG. 8 is a diagram showing an internal configuration of an engine room of a conventional construction machine, and is a schematic cross-sectional view of the engine room seen from the front of the fuselage.
- FIG. 9 (a) is a diagram for explaining the relationship between the size of the cooling package of the cooling device of the construction machine and the thickness of the cooling package, and is a schematic diagram when the inside of the engine room is relatively narrow.
- FIG. 9 (b) is a diagram for explaining the relationship between the size of the cooling package of the construction equipment and the thickness of the cooling room, and is a schematic diagram in a case where the size of the cooling room is relatively large.
- FIG. 10 is a schematic diagram showing a performance curve of a general axial flow type cooling fan.
- Fig. 11 (a) is a schematic diagram showing the flow of cooling air before and after the cooling fan when the pressure loss on the upstream side is relatively small, using a vector.
- Fig. 11 (b) is a schematic diagram showing the flow of cooling air before and after the cooling fan when the pressure loss on the upstream side is relatively small, using vectors.
- Fig. 12 (a) is a schematic diagram showing the flow of cooling air before and after the cooling fan when the pressure loss on the upstream side is relatively large, using vectors.
- Fig. 12 (b) is a schematic diagram showing the flow of the cooling air before and after the cooling fan when the pressure loss on the upstream side is relatively large, using vectors.
- FIG. 13 is a schematic perspective view showing the configuration of a conventional cooling device for construction machinery.
- an arrow X in the drawings indicates a front-to-rear direction of the construction machine (hereinafter also referred to as an engine room width direction), and an arrow Y in the drawings indicates a left-right direction of the construction machine. (Hereinafter also referred to as fan axial flow direction).
- FIG. 1 is a schematic perspective view showing the entire configuration of a construction machine.
- the construction machine includes three parts: a lower traveling structure 1, an upper revolving structure 2 that is rotatably disposed above the lower traveling structure 1, and a working device 3 that is provided on the upper revolving structure 2 and performs various operations. It is composed of The upper revolving superstructure 2 is provided with a counterweight 2A at the rear of the aircraft, and an engine room 2B at the front of the aircraft with the counterweight 2A.
- FIG. 2 is a schematic cross-sectional view of the engine room 2B as viewed from the front of the fuselage
- FIG. 3 is a schematic side view of the upper swing body 2.
- an engine 26 is installed with its crankshaft facing the fuselage left and right direction Y, and an axial cooling fan 25 is arranged on the right side of the engine 26 in Fig. 2.
- the cooling fan is installed in such a position that its axial flow direction coincides with the lateral direction Y of the aircraft, and allows the cooling air to flow through the cooling air passage formed by the internal space of the engine room 2B. (Here, the cooling air is sent to the left side in Fig. 2).
- the cooling fan 25 is an engine driven type mechanically connected to an engine crankshaft, but is not limited to this, and may be a hydraulic driven type.
- a cooling package 24 including a radiator and an oil cooler is installed, and on the downstream side of the engine 26 in the axial direction of the fan ( On the left side in Fig. 3, a hydraulic pump 27 mechanically connected to the engine crankshaft is installed.
- the interior of the engine room 2B contains a cooling package 24, an engine 26 and a hydraulic pump 27 are separated from each other, and a radiator room 2 Ba where a radiator (cooling package 24) is installed, and a main room where an engine 26 and a cooling fan 25 are installed (Hereinafter referred to as the main engine room) 2 Bb and a pump room 2 Bc in which a hydraulic pump 27 is installed.
- the lower wall of the machine body wall 2 1 that forms the engine room 2 B (the bottom of the machine body, hereinafter also referred to as the floor) 23 has a bottom guard 2 facing the bottom of the oil pan 26 a in the engine room 2 B.
- the bottom guard 23A protects the oil pan 26a and other equipment in the engine room 2B from stones that have been thrown off the ground. ing.
- the bottom guard 23 A is fixed to the swing frame (the part excluding the bottom guard 23 A from the floor surface 23) 30 by bolts 40 between the main rails 31 and 31, and the pottom guard 23 A is detachable from the swing frame 30. For example, when maintenance of the oil pan 26a is performed, the oil pan 26 is detached from the swing frame 30 and separated, and the opening of the swing frame 30 is opened. Then, the maintenance work is performed.
- the engine 26 and the oil pan 26a are mounted on the main rail 31 via a support member (not shown). Although the main rail and support members are omitted in Fig. 8 showing the configuration of the conventional engine room, the engine 106 is also mounted on the main rail, and the engine is mounted on the main rail 31. Is a general configuration performed conventionally.
- the pottom guard 23 A includes a bottom guard body 23 B and a rectifying box (guide member) 23 C fixed to the pottom guard body 23 B.
- the bottom guard main body 23B is attached to the swing frame 30 so as to cover the opening formed in the swing frame 30, in other words, to shield the inside of the engine room 2B from the outside. Opening (cooling air discharge opening) 23 B a
- the rectifying box 23 C is fixed to the surface 23 B c of the bottom guard body 23 B (the surface facing the inside of the engine room 2 B when the bottom guard 23 A is attached to the swing frame 30). Have been.
- the rectifier box 23C is It is arranged below the oil pan 26a and in the space between the main rails 31 and 31.
- the engine 26 is conventionally mounted on the main rails 31 and 31 via a support member (not shown), and this space is a conventional space. In other words, the rectifying box 23 C is placed by effectively using this space.
- the shape and shape of the cooling fan 25 are set so that the cooling fan 25 is located at a predetermined distance from the cooling fan 25 in the radial direction of the fan blades. The arrangement is set.
- the upper wall (ceiling surface) 22 of the fuselage is provided with an opening (introduction opening) 22c on the upper wall 22 facing the radiator room 2Ba and the main engine room 2Bb.
- the upper wall 22 has an opening (discharge opening) 22a.
- a bulge (bulging portion) 22b is attached to the outside of the upper body wall 22 so as to cover the discharge opening 22a.
- the discharge opening 2 2 a is, as in the case of the cooling air inlet of the pottom guard 23 A, the cooling fan 2 with respect to the outer periphery of the cooling fan 25, that is It is located at the same position as 5 (including not only at exactly the same position but also at approximately the same position). In detail, it is located immediately below the cooling fan 25 (directly downstream of the fan axial flow direction Y). Position is set.
- the bulge 22 b has a structure in which the end on the radiator room 2 B a side is closed while the end on the pump room 2 B c side is open.
- the cooling air discharged from 2B is provided in the radiator room 2Ba in the horizontal direction (including not only completely horizontal direction but also substantially horizontal direction) by the bulge 22b and in the fan axial direction Y. After being deflected toward the opposite side from the cooling air inlet 22 c, the air is discharged out of the machine.
- FIG. 4 is a schematic perspective view of the bottom guard 23 A, and the arrow in the upper right in the figure indicates the direction in which the bottom guard 23 A is attached to the fuselage.
- the bottom guard main body 23B is a rectangular plate-shaped member, and the cooling air discharge opening 23Ba is formed near the downstream side in the axial direction of the fan. a is formed in a slit shape long in the engine room width direction X. In addition, holes 23Bb are formed in the four corners of the bottom guard main body 23B to pass through the port 40 for fixing to the swing frame 30.
- the rectifying box 23C is fixed to the bottom guard main body 23B so as to cover the cooling air discharge opening 23Ba in the engine room width direction X and the fan axial flow direction Y.
- the vertical surface 23 C—1 which is the downstream end in the axial direction of the fan, extends from the upper end of the vertical surface 23C-1 to the upstream side in the axial direction of the fan.
- Horizontal plane 2 3 C-1 in a position parallel to 2 3 B, slope 2 3 C-3 extending from this horizontal plane 2 3 C-2 toward the upstream of the fan in the axial flow direction and near the cooling fan, and the engine It consists of side surfaces 23 C—4 and 23 C—5, which are the end surfaces in the room width direction X.
- FIG. 5 is a schematic perspective view showing the configuration of the upper part of the engine room 2B.
- the cooling air inlet 22 c and the engine room outlet 22 a are formed as slit-shaped openings that are long in the longitudinal direction X of the aircraft as shown in FIG.
- the bulge 22 b has a substantially box-shaped contour that is long in the engine room width direction X, and has an opening on the side facing the engine room outlet 22 a when mounted on the upper body wall 22.
- the end face on the downstream side in the fan axial direction has an opening (discharge hole) 22 ba having a relatively short shape (circular here) in the engine room width direction X. Multiple units are arranged along the direction X.
- the cooling fan 25 by operating the cooling fan 25, the outside air taken in as cooling air from the inlet opening 22c into the engine room 2B (cooling air passage) is reduced. After passing through the cooling package 24, it is discharged to the outside through the engine room discharge opening 22 a and the bottom guard discharge opening 23 Ba described above.
- the pump 27 is designed to cool the hydraulic oil.
- the cooling device of the present invention includes the introduction opening 2 2 c, the engine room 2 B (the spaces in the body 21, that is, the rooms 2 Ba, 2 Bb, and 2 Be), the cooling package 24, and the cooling fan 2. 5. It has a discharge opening 22a, a parge 22b, and a bottom guard 23A.
- a small part of the cooling air flowing into the engine room 2B is connected to the connecting portion 27a between the engine 26 and the hydraulic pump 27, and between the main engine room 2Bb and the pump room 2Bc. It flows into the pump room 2Bc through the gap with the partition wall 28. For this reason, mesh-shaped openings 22b and 23b are provided on the upper surface 22 and the lower surface 23 of the airframe body wall 21 facing the pump room 2Bc, respectively.
- the cooling air that has flowed into the fan is discharged from the openings 22b and 23b to the outside of the machine.
- the cooling device for a construction machine as one embodiment of the present invention is configured as described above, and the cooling air is discharged outside the device as shown in FIG.
- the upstream end 23Ca of the rectifying box 23C of the bottom guard 23A is arranged in the engine room floor surface 23 where the cooling air is facing (the rectifying box 23). C), and the cooling air sent from the cooling fan 25 is not directly affected by the resistance and is sent to the cooling air outlet 23 Ba by the rectifying box 23 C. And it is smoothly discharged from engine room 2B. Therefore, the cooling air discharge efficiency can be improved.
- the engine room outlet 22 a is provided on the engine room ceiling surface 22 where the cooling air sent from the cooling fan 25 is directed. Can be improved.
- the opening area of the engine room 2B is reduced, and the wind noise generated when the engine sound and the cooling air pass through the fan blades and the cooling package 24.
- Noise (hereinafter referred to as “engine noise”) can be suppressed from leaking to the outside, that is, noise, and the pressure loss of cooling air can be reduced. It becomes possible to aim at.
- the efficiency of discharging the cooling air is improved, it is possible to increase the air flow even if the cooling fan 25 of the same specification is used, and the specification such as the heat exchange area of the cooling package 24 is reduced. It becomes possible.
- part of the engine noise and the like passes through the rectifying box 23C and the bottom guard main body 23B, and leaks to the outside as noise.
- the noise can be suppressed by the shielding by the rectifying box 23C.
- the length dimension of the rectifying box 23C in the fan axial flow direction Y is set to be equal to or longer than a predetermined length so that the above-described noise attenuation effect can be sufficiently obtained (for example, smaller than a predetermined regulation value).
- the position of the frontage 23 Ba of the bottom guard main body 23 B that substantially defines the above-mentioned length is set as far downstream as possible in the axial flow direction of the fan.
- the cooling air discharged from the engine room 2B through the engine room outlet 22a is deflected horizontally by the bulge 22b, and then discharged out of the machine.
- the propagation direction of engine noise and the like (noise) propagating to the outside through the space inside the Pulge 22b is deflected in the horizontal direction.
- the noise propagation range (direction and distance of propagation) is reduced. (The spread of noise can be suppressed.)
- FIG. 1 is a diagrammatic representation of Patent Document 2 described above.
- the cooling air passages 1 3 1, 1 3 3 on the side of the engine room 1 3 1 a, 1 3 3 a are the cooling air passages 1 3 2 on the top of the engine room. Both are formed on the upper surface of the engine room, and there is a possibility that noise concentrates on the upper part of the engine room and loud noise is locally generated. Furthermore, as described above, since the cooling air passages 13 1 and 13 3 are provided on the side of the engine room, the counter weight 1
- the cooling device has a simple configuration in which a rectifying box is provided in the bottom guard, the engine room structure can be simplified as compared with the conventional technology of Patent Document 2 described above.
- the flow regulating box 23 C is located in a conventional space defined by the oil pan 26 a and the main rails 31, 31, the engine room 2 B can be increased. Therefore, there is an advantage that the above effects can be obtained.
- the present invention has been described above.
- the present invention is not limited to the above-described embodiments, and can be variously modified and implemented without departing from the gist of the present invention.
- the configuration in which the bulge 22 b is attached to the upper wall surface 22 of the body of the aircraft has been described.
- the bulge 22 b (see FIG. A duct 32 that extends to the side (a portion downstream of the engine room discharge opening 22a is longer) may be used instead of the bulge 22b.
- noise propagating to the outside through the engine room discharge opening 22 a is absorbed by the inner wall surface of the duct 32.
- the bottom guard .23 is configured to be fixed to the swing frame 30 with bolts, and is configured to be detached from the swing frame 30 and completely separated during maintenance.
- a structure may be adopted in which one end is attached to the swing frame 30 via a hinge and the opening formed in the swing frame 30 is opened and closed by swinging up and down.
- the air path is divided into the air path between the bottom guard main body 23 B and the rectifying box 23 C in the engine room width direction X so as to be partitioned along the axial flow direction (Y).
- a plate rectifier plate
- the flow of the cooling air flowing through the air passage in the engine room width direction X is regulated, and the cooling air flows smoothly toward the cooling air outlet, so that the back pressure of the cooling air can be reduced. .
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- General Engineering & Computer Science (AREA)
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Abstract
Description
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04735384A EP1628001A1 (en) | 2003-05-28 | 2004-05-28 | Construction machine bottom guard, construction machine engine room construction and construction machine cooling device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-151519 | 2003-05-28 | ||
JP2003151519A JP2004353265A (ja) | 2003-05-28 | 2003-05-28 | 建設機械のボトムガード,建設機械のエンジンルーム構造及び建設機械のエンジン冷却装置 |
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PCT/JP2004/007760 WO2004106710A1 (ja) | 2003-05-28 | 2004-05-28 | 建設機械のボトムガード,建設機械のエンジンルーム構造及び建設機械の冷却装置 |
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JP (1) | JP2004353265A (ja) |
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Cited By (1)
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CN111022171A (zh) * | 2020-01-10 | 2020-04-17 | 建德戏星机械科技有限公司 | 一种发动机冷却装置 |
Families Citing this family (10)
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JP2007032477A (ja) * | 2005-07-28 | 2007-02-08 | Shin Caterpillar Mitsubishi Ltd | 車両 |
JP4175398B2 (ja) * | 2006-06-30 | 2008-11-05 | コベルコ建機株式会社 | 建設機械の排気構造 |
FR2955297B1 (fr) * | 2010-01-20 | 2012-04-06 | Peugeot Citroen Automobiles Sa | Vehicule automobile a ecoulement d'air de refroidissement optimise |
JP5824961B2 (ja) * | 2011-08-19 | 2015-12-02 | コベルコ建機株式会社 | 建設機械の冷却装置 |
JP5960024B2 (ja) * | 2012-10-23 | 2016-08-02 | 住友建機株式会社 | 建設機械の排気装置 |
JP6268927B2 (ja) * | 2013-10-30 | 2018-01-31 | コベルコ建機株式会社 | 建設機械の排気構造 |
JP5850024B2 (ja) * | 2013-10-31 | 2016-02-03 | コベルコ建機株式会社 | 作業機械 |
CN104590002B (zh) * | 2015-01-09 | 2017-02-22 | 徐工集团工程机械股份有限公司道路机械分公司 | 一种车辆动力舱空气导流装置 |
JP6307048B2 (ja) * | 2015-06-18 | 2018-04-04 | 本田技研工業株式会社 | 車両構造 |
JP6754351B2 (ja) * | 2017-12-26 | 2020-09-09 | 株式会社日立建機ティエラ | 建設機械 |
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JPS55152327U (ja) * | 1979-04-17 | 1980-11-04 | ||
JPH11117761A (ja) * | 1997-10-13 | 1999-04-27 | Komatsu Ltd | 吸音ダクト |
JP2001301473A (ja) * | 2000-04-19 | 2001-10-31 | Komatsu Ltd | エンジンルームの空気口構造 |
-
2003
- 2003-05-28 JP JP2003151519A patent/JP2004353265A/ja active Pending
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2004
- 2004-05-28 WO PCT/JP2004/007760 patent/WO2004106710A1/ja active Application Filing
- 2004-05-28 EP EP04735384A patent/EP1628001A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS55152327U (ja) * | 1979-04-17 | 1980-11-04 | ||
JPH11117761A (ja) * | 1997-10-13 | 1999-04-27 | Komatsu Ltd | 吸音ダクト |
JP2001301473A (ja) * | 2000-04-19 | 2001-10-31 | Komatsu Ltd | エンジンルームの空気口構造 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111022171A (zh) * | 2020-01-10 | 2020-04-17 | 建德戏星机械科技有限公司 | 一种发动机冷却装置 |
CN111022171B (zh) * | 2020-01-10 | 2020-11-13 | 宁波里尔汽车技术有限公司 | 一种发动机冷却装置 |
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JP2004353265A (ja) | 2004-12-16 |
EP1628001A1 (en) | 2006-02-22 |
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