JP2005083315A - Cooling device for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drastically reduce noise, in particular, above a machine body in a cooling device for a construction machine. <P>SOLUTION: The cooling device for the construction machine having an engine room 2B in which cooling air taken in from the outside of the machine flows and a cooling unit 30 set in the engine room 2B and cooled with the cooling air, comprises a cooling air intake part 25 formed on a machine body side wall face 22 forming the engine room 2B, and a partitioning member 26 with an opening 27 set to partition the engine room 2B into an upstream side and a downstream side in the cooling air flowing direction Y with a specified interval apart from the machine body side wall face 22 at the upstream side of the cooling air flowing direction of the cooling unit 30. The intake part 25 of the machine body side wall face 22 and the opening 27 of the partitioning member 26 are arranged vertically and/or laterally in different positions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling device for a construction machine that sucks cooling air from the outside of the machine and cools a cooling unit installed in an engine room, and thus engine cooling water and hydraulic oil, by the cooling air.

  Today, various construction machines such as traveling construction machines such as excavators and wheel loaders and stationary construction machines such as cranes are used in various fields such as construction sites, harbors, factories, and the like. Construction machines are generally used in harsh environments such as excavation of rocks in dams, tunnels, rivers, roads, etc., and demolition of buildings and buildings. However, in such environments, they are used for equipment such as engines and hydraulic pumps. The applied load is high, and the engine temperature and hydraulic oil temperature are likely to rise.

  Therefore, in these construction machines, as shown in FIG. 8, a cooling package 104 made up of a relatively large-capacity radiator or oil cooler for cooling the cooling water of the engine 106, the hydraulic oil of the oil pump 108, or the like is used. The cooling package 104, and thus the above-described one, is provided in the room 102 (radiator room 102A) by the cooling air taken into the engine room 102 through the intake openings 109 and 110 from the outside of the machine by the operation of the cooling fan 105. Thus, engine cooling water, pump hydraulic oil, etc. are cooled.

The cooling air that has passed through the cooling package 104 has openings 111 and 112 provided on the ceiling or floor of the main engine elm 102B, or openings 113 and 112 provided on the ceiling or floor of the pump room 102C. 114 is discharged.
In addition to this, there are techniques disclosed in Patent Document 1 and Patent Document 2 as the structure of the engine room.

  In the technology disclosed in Patent Document 1, a cooling air intake port is provided on the ceiling surface of the engine compartment, and a duct (door duct) extending in the vertical direction is provided on the door of the engine compartment, and the floor surface of the engine compartment is provided. Is provided with a floor duct extending toward the radiator. The door duct has an upper end that opens to the outside on the engine room ceiling surface, and a lower end (discharge port) that is connected to an upstream end (inlet port) of the floor duct when the door is closed. It has become. As a result, the cooling air sucked from the door duct is guided through the floor duct to the lower part of the radiator where the cooling air tends to be insufficient, so that the entire surface of the radiator is effectively cooled. It has become.

Moreover, in the technique disclosed in Patent Document 2, a radiator is provided by providing a plurality of air guide paths arranged in the vertical direction between a cooling air intake provided on a ceiling surface of an engine room and an intake surface of the radiator. The distribution of the passing cooling air is made uniform.
Actual opening and closing No. 5-46528 JP-A-9-195711

In construction machinery, a cooling fan is a major noise source, and fan noise (wind noise from the fan blades) that leaks from the opening of a radiator room in which the cooling fan is installed is a major noise in construction machinery.
However, in any of the above prior arts, since an air inlet for sucking outside air into the engine room is provided on the ceiling surface, noise is emitted upward. That is, in the technique shown in FIG. 8, the fan sound leaks directly from the intake ports 109 and 110 to the outside of the machine. In each technique disclosed in Patent Documents 1 and 2, ducts (wind guides) are used. The fan sound leaks from the intake port to the outside of the machine through the road.

  It is possible to suppress the noise emitted from the construction machine in the horizontal direction, for example, by surrounding the work place with a shield in the horizontal direction, but providing such a shield against the noise emitted vertically upward. However, noise generated in the horizontal direction is absorbed mainly by the ground, etc., but there is no such absorbing material for noise emitted vertically upward, so its propagation range is It will be extremely wide.

It may be possible to reduce such upward noise by reducing the intake opening area, but in this case, the flow resistance to the cooling air increases, the flow rate of the cooling air decreases, and the cooling performance of the cooling package. New issues arise, such as causing a decline in
The present invention was devised in view of such problems, and it is an object of the present invention to provide a cooling device for a construction machine that can significantly reduce the noise particularly above the fuselage.

  In order to achieve the above object, a cooling device for a construction machine according to a first aspect of the present invention includes an engine room in which cooling air sucked from outside the machine circulates, and the cooling air installed in the engine room. A cooling device for a construction machine having a cooling unit cooled by a cooling air, having a cooling air suction portion formed on a side wall surface of an airframe forming the engine room, and having an opening to distribute the cooling air more than the cooling unit. A partition member installed at a predetermined interval from the airframe side wall surface at a predetermined distance from the airframe side wall surface to partition the engine room into an upstream side and a downstream side in the cooling air flow direction. The suction part and the opening of the partition member are arranged at different positions in the vertical direction and / or the horizontal direction.

A construction machine cooling device according to a second aspect of the present invention is the construction machine cooling device according to the first aspect, wherein the predetermined portion of the airframe wall surface on which the suction portion is formed excludes the predetermined portion from the airframe wall surface. It is characterized by being configured as an airframe wall opening / closing section that can be opened and closed with respect to the airframe wall body.
A construction machine cooling apparatus according to a third aspect of the present invention is the construction machine cooling apparatus according to the second aspect, wherein the partition member is attached to the airframe wall surface opening / closing section.

A construction machine cooling apparatus according to a fourth aspect of the present invention is the construction machine cooling apparatus according to the second aspect, wherein the partition member is attached to the body wall surface body.
A construction machine cooling device according to a fifth aspect of the present invention is the construction machine cooling device according to any one of the first to fourth aspects, wherein the opening of the partition member is positioned in front of the cooling unit. It is characterized by being set.

The construction machine cooling device according to a sixth aspect of the present invention is the construction machine cooling device according to any one of the first to fifth aspects, wherein the opening area of the partition member is the side wall surface of the airframe. It is characterized by being larger than the sum of the opening areas of the suction parts.
A construction machine cooling apparatus according to a seventh aspect of the present invention is the construction machine cooling apparatus according to any one of the first to sixth aspects, wherein the suction portion of the side wall surface of the machine body is along a predetermined direction. One is arranged on each side of the opening of the partition member.

The construction machine cooling device according to the present invention described in claim 8 is the construction machine cooling device according to claim 7, wherein a dimension of the clearance between the airframe side wall surface and the partition member in the cooling air flow direction is as described above. It is characterized by being larger than the dimension in the predetermined direction of each of the suction portions provided on both sides of the opening of the partition member.
A construction machine cooling apparatus according to a ninth aspect of the present invention is the construction machine cooling apparatus according to any one of the first to eighth aspects, wherein the cooling air is supplied from the air intake portion of the body side wall surface to the cooling air. A guide member that guides to the opening of the partition member is provided.

A construction machine cooling apparatus according to a tenth aspect of the present invention is the construction machine cooling apparatus according to the ninth aspect, wherein the guide member is formed by molding a sound absorbing material.
The cooling device for a construction machine according to an eleventh aspect of the present invention is the cooling device for a construction machine according to any one of the first to tenth aspects, wherein the partition member has a surface facing the cooling air suction portion. It features a sound absorbing material.

  According to the construction machine cooling device of the present invention, the cooling air suction portion formed on the airframe side wall surface forming the engine room, and the opening from the airframe side wall surface upstream of the cooling unit with the opening in the cooling air flow direction. A partition member installed so as to partition the engine room into an upstream side and a downstream side in a cooling air flow direction with a predetermined interval is provided, and the suction part on the side wall surface of the airframe and the opening of the partition member are provided. Are arranged at different positions in the vertical direction and / or the horizontal direction, so that noise generated from equipment arranged in the engine room is double-shielded by the body side wall surface and the partition member from outside the machine. In addition, as described above, since the position of the partition member opening and the airframe side wall surface suction portion are shifted, it is possible to suppress noise from leaking directly to the outside of the aircraft, and as a result, the noise can be effectively reduced. Target So it can be suppressed.

  Since the suction part, which is the leakage part of the noise to the outside of the aircraft, is formed on the side wall surface of the aircraft, the noise leaked outside the aircraft will propagate in the horizontal direction, especially greatly increasing the noise above the aircraft Can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 7 indicate the engine room width direction (the front-rear direction of the construction machine), and the arrow Y in the figure indicates the cooling air flow direction (the left-right direction of the construction machine).
In the following embodiments, examples in which the present invention is applied to a hydraulic excavator as a construction machine will be described.
(1) First Embodiment FIG. 5 is a schematic perspective view showing an overall configuration of a construction machine, and a construction machine according to a first embodiment of the present invention will be described with reference to FIG.

The construction machine includes a lower traveling body 1, an upper revolving body 2 that is disposed on the upper side of the lower traveling body 1, and a work device 3 that is provided on the upper revolving body 2 and performs various operations. Has been. Among these, the upper revolving body 2 has a counterweight 2A disposed behind the airframe, and an engine room 2B disposed in front of the airframe of the counterweight 2A.
Next, a construction machine cooling apparatus according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view from the front showing the configuration of the cooling device for a construction machine according to the present embodiment.

  In the engine room 2B, an engine 32 is installed with its crankshaft directed in the left-right direction Y of the machine body, and an axial-flow type cooling fan 31 is disposed on the right side of the engine 32 in FIG. The cooling fan 31 is installed in such a posture that the axial flow direction thereof coincides with the left-right direction Y of the airframe, and the cooling air is circulated through the cooling air passage formed integrally with the engine room 2B. (Here, the cooling air is sent to the left side in FIG. 1). The cooling fan 31 is an engine drive type that is mechanically coupled to the engine crankshaft, but is not limited to this, and may be a hydraulic drive type.

A cooling package 30 having a relatively large capacity radiator and oil cooler (cooling unit) is installed on the upstream side (right side in FIG. 1) of the cooling fan 31 in the cooling air flow direction Y.
Further, a hydraulic pump (not shown) mechanically coupled to the engine crankshaft is installed on the downstream side (left side in FIG. 1) in the cooling air flow direction Y of the engine 32.

  The engine room 2B is partitioned between the cooling package 30, the engine 32, and the hydraulic pump, and the radiator room 2Ba in which the radiator (cooling package 30) is installed, the engine 32, and the cooling fan 31 are installed. The main room (hereinafter referred to as main engine room) 2Bb is divided into a pump room (not shown) in which a hydraulic pump is installed.

A predetermined portion (airframe wall opening / closing portion) 20A that forms an upstream portion in the cooling air flow direction including the side surface 22 of the airframe wall surface 20 around the engine room is an airframe wall surface body (excluding the predetermined portion 20A from the airframe wall surface 20). moiety) and can be opened and closed configuration relative to 20B, here, is pivotally supported at one end portion to the fuselage wall body 20B, and is formed so as to be swingable outwardly engine room around the shaft center C _L. That is, the upper swing body 2 is provided with a side door 20 </ b> A that opens one side facing the engine room 2 </ b> B.

The side door 20A is formed with two intake openings (cooling air suction portions) 25, 25 that are lined up and down at a predetermined interval. Outside air is sucked into the engine room from the intake opening 25 as cooling air.
Further, a duct (partition member) 26 is attached to the inside of the side door 20A (side facing the engine room) so as to cover the intake opening 25, and the duct 26 faces the cooling package 30. Thus, a relatively large opening 27 is provided. As a result, an air passage V is formed between the side door 20A and the duct 26, with the intake opening 25 of the side door 20A being the inlet of the cooling air and the opening 27 of the duct 26 being the outlet of the cooling air. ing.

Here, of the two intake openings 25, one intake opening 25 is disposed above the duct opening 27 at a predetermined interval, and the other intake opening 25 is below the duct opening 27. Are arranged at predetermined intervals. That is, each intake opening 25 is arranged with the intake opening 25 shifted in the vertical direction with respect to the duct opening 27.
A rectifying plate (guide member) 28 is installed in the air passage V inside the side door 20A. The rectifying plate 28 is attached to the inner side surface of the side door 20A between the intake openings 25 arranged vertically. The rectifying plate 28 rectifies the cooling air and guides it from the intake openings 25 to the duct openings 27. It has become.

In such a configuration, by operating the cooling fan 31, the outside air flows from the intake opening 25 provided in the side door 20A to the engine room 2B (cooling air passage) as indicated by arrows C ₁ and C ₄ . The air is taken in as cooling air and passes through the cooling package 30 via the air passage V in the duct 26 as indicated by arrows C ₂ and C ₃ and arrows C ₅ and C _6. The oil is cooled.

In other words, the cooling device for the construction machine is configured to include the engine room 2B (cooling air passage), the intake opening 25, the duct 26, the duct opening 27, the rectifying plate 28, the cooling package 30, and the cooling fan 31. It is.
The peripheral structure of the side door 20A and the duct will be further described with reference to FIGS. 2 is a schematic perspective view showing a state in which the side door 20A is closed, and FIG. 3 is a schematic perspective view showing a state in which the side door 20A is opened.

The side door 20A is attached to the body wall surface main body 20B so as to be swingable as described above via the pair of hinges 20Aa in which one end on the driver's seat 4 side is arranged vertically. Further, each of the intake openings 25 of the side door 20A is formed by arranging an opening row composed of a plurality of openings 25a arranged in the longitudinal direction X of the vehicle body in the closed state in two upper and lower stages.
The duct 26 has a substantially box-shaped contour that is open on the side connected to the side door 20A. That is, it is composed of a back surface (a surface facing the cooling package 30) 26a, a ceiling surface 26b, side surfaces 26c and 26d, and a bottom surface 26e.

Further, the total opening area A ₁ of both the intake openings 25 and the opening area A ₂ of the duct opening 27 are set so that the opening area A ₂ is larger than the opening area A ₁ . Here, the total opening area A ₁ of both the intake openings 25 is an area per opening 25a provided in the side door 20A (here, the opening 25a is a rectangle having a vertical dimension a × a horizontal dimension b, The area per one is a × b) multiplied by the number of openings 25a (7 × 4 stages = 28) (A ₁ = 28ab).

That is, the size of the outlet (the air passage cross-sectional area A _{2 at the} cooling air outlet) is set larger than the size of the inlet in the air passage V (the air passage cross-sectional area A ₁ at the cooling air inlet), and each intake opening The pressure loss experienced when the cooling air from 25 merges is reduced so that the cooling air flows smoothly through the air path V.
Further, here, the two intake openings 25 are arranged one above the other, but the dimensions in the direction in which the intake openings 25 are arranged (here, the vertical dimensions, which are above the upper openings 25a constituting the intake openings 25). The distance L from the edge to the lower edge of the lower opening 25a) L _1a , L _1b , the dimension L related to the cooling air flow direction Y of the air passage (in other words, the gap between the side door 20A and the duct back surface 26a) V The dimensions L _1a , L _1b , and L ₂ are set so that ₂ becomes larger (L ₂ > L _1a , L ₂ > L _1b ), and the pressure of the cooling air in the duct 26 is set by such setting. We are trying to keep losses as small as possible. The most dominant pressure loss that the cooling air receives when the cooling air flows through the air passage V is the narrowest place (the smallest cross-sectional area of the air passage) of the air passage V, and the flow velocity of the cooling air is the largest. It is a loss at a low place, and it can be said that an efficient design is to make the flow path cross-sectional area of the air path V uniform (the cross-sectional area perpendicular to the flow direction of the cooling air flowing through the air path V). Cooling air through said dimension L _1a and the width dimension W is the flow path cross-sectional area approximated by the product of the duct 26 (or cross-sectional area flow path is approximated by the product of width W dimension L _1b and the duct 26) Then, it flows into the duct 26 and flows out of the duct 26 through the flow path cross-sectional area approximated by the product of the dimension L ₂ and the width dimension W of the duct 26. Therefore, theoretically, it is an efficient design to make the dimension L ₂ equal to the dimension L _1a (or the dimension L _1b ), but actually, as shown in FIG. When flowing from a location defined by the dimension L _1a (or a location defined by the dimension L _1b ) to a location defined by the dimension L ₂ as indicated by a broken line arrow (that is, the air flows from the intake opening 25 and enters the duct opening 27 Since it bends (in the process of flowing out), a space ΔL (in other words, a portion that does not function as a flow path) is required to bend. For this reason, this space ΔL is anticipated in advance, and accordingly, the dimension L ₂ is set larger than the dimension L _1a (or the dimension L _1b ).

For example, a sheet-like sound absorbing material is affixed to the inner wall surface of the duct 26 (the surface facing the intake opening 25), or the sound is absorbed by the rectifying plate 28 so that noise leaking outside the machine through the duct 26 can be reduced. It is preferable to use a molded material.
The construction machine cooling apparatus according to the first embodiment of the present invention is configured as described above, and its operation and effect will be described with reference to FIG.

  That is, since the intake opening 25 is provided on the side door 20A, that is, the side surface 22 of the upper swing body 2, even if fan noise or the like leaks outside the machine through the intake opening 25, the leaked sound is horizontal. Propagate in the direction. It is possible to suppress the noise emitted from the construction machine in the horizontal direction, for example, by enclosing the work place with a shield, but providing such a shield against the noise emitted vertically upward is a major work. However, noise generated in the horizontal direction is absorbed mainly by the ground, etc., but there is no such absorbing material for noise emitted in the vertical direction, so its propagation range is extremely wide.

Therefore, by setting the noise propagation direction in this horizontal direction, the propagation range (propagation direction and propagation distance) can be narrowed (noise spread can be suppressed).
Furthermore, since the cooling air is supplied to the cooling package 30 from the duct outlet 27 provided on the front surface of the cooling package 30, the cooling air can be supplied to the cooling package 30 without deviation.

Further, some of the fan sound, engine sound, etc. are transmitted through the space V inside the duct 26 so as to reverse the traveling path of the outside air and leak as noise to the outside. At this time, the duct forming the space V 26 and the wall surface of the side door 20A are absorbed / attenuated to suppress noise.
Further, a part of the fan sound or the like proceeds from the duct opening 27 into the duct 26 as shown by a one-dot chain arrow N ₁ in FIG. 1, but the duct opening 27 and the opening 25 of the side door 20A are different from each other. The fan sound or the like indicated by the arrow N ₁ reaches the side door 20A side, and then passes through the intake opening 25 of the side door 20A as indicated by arrows N ₂ and N _3. Leak out. That is, the fan sound cannot linearly pass through the duct opening 27 and the intake opening 25 (directly leaks out of the machine), and the space V is a wall surface (duct 26 or side door 20A). It will leak to the outside of the machine while repeating this collision, and it will be attenuated by this collision with the wall surface, and noise will be suppressed.

Further, a part of the fan sound or the like is transmitted through the wall surface of the duct 26 as shown by a one-dot chain line arrow N ₄ in FIG. 1, but as described above, the duct opening 27 and the opening 25 of the side door 20A are vertically moved. Since they are arranged so as to be shifted in the direction, the fan sound transmitted through the wall surface of the duct 26 in this way is shielded from the outside by the side door 20A. That is, as shown by the arrow N ₄ , the duct 26 and the side door 20A (here, the rectifying plate 28) become obstacles to the fan sound that propagates outside the machine. Therefore, the fan sound or the like is attenuated by being overlapped by the duct 26 and the side door 20A, so that noise can be suppressed as compared with the conventional structure without the duct 26.

Further, since the duct 26 is attached to the side door 20A, when performing maintenance on the duct 26, if the side door 20A is opened and the duct 26 is moved out of the engine room, the front of the duct 26 is widely opened. The maintenance work of the duct 26 can be performed in the state.
(2) 2nd Embodiment With reference to FIG.6 and FIG.7, the cooling device of the construction machine as 2nd Embodiment of this invention is demonstrated. 6 and 7 are diagrams showing the construction machine cooling apparatus according to the present embodiment. FIG. 6 is a schematic cross-sectional view in front view, and FIG. 7 is a schematic diagram showing a configuration upstream of the cooling package 30. FIG. In addition, about the component already demonstrated by the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

The construction machine cooling apparatus according to the present embodiment is different in that the partition member is attached not to the side door 20A but to the body wall surface main body 20B.
That is, the entire periphery of the partition wall 36 as a partition member is fixed to the airframe wall surface body 20B so that the engine room is partitioned between the intake opening 25 formed in the side door 20A and the cooling package 30. Has been.

Further, the partition wall 36 is formed with an opening 37 positioned in front of the cooling package 30. When the side door 20A is closed, the cooling air flowing from the intake opening 25 of the side door 20A is From the opening 37 of the partition wall 36, it flows into the cooling package 30 on the front.
Further, by opening the side door 20A as shown in FIG. 7, the front of the partition wall 36 is opened, so that the maintenance of the partition wall 36 can be performed.

Since other configurations are the same as those of the first embodiment, description thereof is omitted.
The engine cooling device as the second embodiment of the present invention is configured in this way, and the same operation and effect as the first embodiment can be obtained, and a partition member (partition wall) 36 is provided on the body wall surface body 20B. Since it is attached, the weight of the side door 20A is reduced and the side door 20A can be easily opened and closed compared to the first embodiment in which the partition member (duct) 26 is attached to the side door 20A. Become.

(3) Others The engine cooling device of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in each of the above-described embodiments, the example in which the current plate is installed in the duct has been described, but a configuration in which the current plate is not provided in the duct is also possible.

  In each of the above embodiments, since the intake opening 25 is provided in the side door 20A, the ceiling surface 21 is not particularly provided with an intake opening. The air intake opening may be provided on the ceiling surface 21 with an opening area in a range that can reduce the leakage into the ceiling.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view (viewed from the front of a machine body) as viewed from the front, illustrating a main configuration of a cooling device for a construction machine as a first embodiment of the present invention. It is a perspective view by the front view which shows the structure of the side door concerning 1st Embodiment of this invention, and is a figure which shows the state which the side door closed. It is a typical perspective view which shows the structure of the side door and duct concerning 1st Embodiment of this invention, Comprising: It is a figure which shows the state which the side door opened. It is a figure for demonstrating the preferable dimension of the duct concerning 1st Embodiment of this invention, Comprising: It is typical sectional drawing by the front view of a duct principal part. It is a typical perspective view showing the whole construction machine composition concerning a 1st embodiment of the present invention. It is typical sectional drawing by the front view which shows the principal part structure of the cooling device of the construction machine as 2nd Embodiment of this invention. It is a typical perspective view which shows the structure of the side door and partition plate concerning 2nd Embodiment of this invention, Comprising: It is a figure which shows the state which the side door opened. It is typical sectional drawing by the front view which shows the principal part structure of the cooling device of the conventional construction machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 2B Engine room 2Ba Radiator room 2Bb Main engine room 3 Working device 4 Driver's seat 20 Airframe wall surface 20A Side door 20B Aircraft wall surface main body 21 Ceiling surface 22 Side surface 23 Floor surface 23a Opening and closing portion 25 Intake opening 26 Duct (partition member)
26a Back surface 26b, 26c Side surface 26d Bottom surface 26da Opening and closing part 27 Duct opening 28 Current plate 30 Cooling package 31 Cooling fan 32 Engine 36 Partition wall (partition member)
37 Opening of partition wall

Claims (11)

In a cooling device for a construction machine, comprising an engine room through which cooling air sucked from outside the machine flows and a cooling unit installed in the engine room and cooled by the cooling air.
A cooling air suction portion formed on the side wall surface of the airframe forming the engine room;
It has an opening and is installed so as to partition the engine room into an upstream side and a downstream side in the cooling air flow direction at a predetermined interval from the airframe side wall surface upstream of the cooling unit in the cooling air flow direction. It is configured with a partition member,
A cooling device for a construction machine, wherein the suction portion on the side wall surface of the machine body and the opening of the partition member are arranged at different positions in the vertical direction and / or the horizontal direction. The predetermined part of the airframe wall surface on which the suction part is formed is configured as an airframe wall surface opening / closing part that can be opened and closed with respect to the airframe wall surface body excluding the predetermined part from the airframe wall surface. Cooling equipment for construction machinery. The cooling device for a construction machine according to claim 2, wherein the partition member is attached to the airframe wall surface opening / closing part. The cooling device for a construction machine according to claim 2, wherein the partition member is attached to the main body wall surface body. The cooling device for a construction machine according to any one of claims 1 to 4, wherein the opening of the partition member is set in front of the cooling unit. The cooling device for a construction machine according to any one of claims 1 to 5, wherein an area of the opening of the partition member is larger than a sum of opening areas of the suction portions on the side wall surface of the airframe. . The suction part on the side wall surface of the machine body is arranged one by one on both sides of the opening of the partition member along a predetermined direction, according to any one of claims 1 to 6. Construction machine cooling system. The dimension in the cooling air flow direction of the gap between the airframe side wall surface and the partition member is larger than the dimension in the predetermined direction of each of the suction portions provided on both sides of the opening of the partition member. The construction machine cooling device according to claim 7. The construction machine according to any one of claims 1 to 8, wherein a guide member is provided for guiding the cooling air from an intake portion on the side wall surface of the airframe to an opening of the partition member. Cooling system. The cooling device for a construction machine according to claim 9, wherein the guide member is formed by molding a sound absorbing material. The cooling device for a construction machine according to any one of claims 1 to 10, wherein a sound absorbing material is attached to a surface of the partition member facing the suction portion for the cooling air.

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