JP2000297640A - Construction and construction work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively cool and protect cooling cores for, for example, a radiator, an oil cooler, and an inter-cooler from dust, sand, etc. SOLUTION: A compartment 15 is formed by partition in the inside of the machine into sections 11, 12, 13, 14. In the center side of the compartment 15, a radiator core 10a that runs across vertically and horizontally is disposed. An outside air inlet chamber 18 and an outside air discharge chamber 19 are provided before and after the radiator core 10a, respectively. An upper partition 21 of the outside air inlet chamber 18 is provided with an outside air inlet 17 that communicates with the outside. An axial-flow fan 16 is disposed in the outside air discharge chamber 19 to take outside air into the outside air discharge chamber 19 from the outside air inlet chamber 18 through fins 9, 9 of the radiator core 10a. In the radiator core 10a, each cooling tube 7 is formed by a flat tube, and inclination of each cooling tube 7 with respect the to horizontal surface is set, so that an outside air inlet portion side end 12 thereof is positioned higher than an outside air discharge chamber side end 22 by a certain height. Therefore, outside air flows smoothly through a passage 20, between each cooling tube 8 and radiating fin 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction / civil working machine, and more particularly, to an engine cooling water, an oil supplied to a hydraulic system, an air sucked into the engine of a construction / civil working machine such as a shovel and a blade. The present invention relates to a construction / civil working machine configured to be cooled.

[0002]

2. Description of the Related Art In general, blades are used in construction and civil engineering machines.
2. Description of the Related Art Hydraulic devices such as a hydraulic pump, a hydraulic motor, and a hydraulic cylinder are used to operate a working device such as a crane and an excavator, and an engine is used as a power source for operating the hydraulic device. Also, in this type of construction machine, in order to prevent abnormal wear and damage of each part, cooling water circulating in the engine body is cooled by a radiator, and hydraulic oil circulating in a hydraulic circuit is cooled by an oil cooler. In an engine equipped with turbocharged air, the intake air is cooled by an intercooler in order to improve the air charging efficiency.

The structures of the cooling cores of the radiator, oil cooler and intercooler are basically the same,
As shown in FIG. 3, the upper tank 1 and the lower tank 2 are communicated with the cooling tubes 3 at a predetermined interval in the tank longitudinal direction, and the adjacent cooling tubes 3, 3 are spaced at a predetermined interval in the longitudinal direction of the cooling tube. As shown in FIG. 4, side walls 6 and 7 are provided on both sides of the cooling core 5 having a structure connected by heat radiation fins 4. , And a cooling core 10 connected by radiation fins 9 between adjacent cooling tubes 8 at predetermined intervals in the longitudinal direction of the cooling tubes.

In each of the cooling cores 5, 10, the side tanks 6, 7 and the upper tank 1 and the lower tank 2
The side tanks 6 and 7 and the upper tank 1 and the lower tank 2 are connected to a plurality of cooling tubes 3.
, And a single cooling tube is bent and bent many times, and the folded end of the cooling tube and the junction between the upper tank 1 and the lower tank 2 or both side tanks 6, 7 are opened to each other. It is known that the cooling tubes 3, 3, 8, 8 are connected to each other by fusion bonding over the entire circumference thereof. , 8 are connected by a plurality of radiating fins 4, 9 at intervals in the longitudinal direction, and each of the radiating fins 4, 9 is bent many times in a wave form, and both ends and each bending point are formed. A structure in which the cooling tubes 3, 3, 8, 8 are fused and connected to each other is known.

FIG. 5 shows a conventional construction and civil engineering machine having a configuration in which a radiator is forcibly cooled by an axial fan, and a storage chamber 15 partitioned by partitions 11 to 14 is formed at the rear of an upper revolving unit 30 to form a compartment. The cooling core 10 a shown in FIG. 4 is installed as a radiator core in the housing chamber 15, and the outside air is introduced from the outside air inlet 17 by suction of the axial fan 16. A cooling core (hereinafter, referred to as a radiator core) 10a is formed to have a size that traverses the housing chamber 15 vertically, horizontally, and horizontally.
5 and the radiator core 1
The outside air introduction chamber 18 is defined in front of the outer air discharge chamber 0a, and the outside air discharge chamber 19 is defined in the rear, and the axial flow fan 16 is installed in the outside air discharge chamber 18 as a cooling fan, thereby adjoining the radiator core 10a. A passage 2 through which outside air passes between the radiation fins 9 and the space between the cooling tubes 8
It is set to 0. And among the partition walls 11, the outside air introduction chamber 1
An outside air introduction port 17 is formed in the upper partition 21 of 8 so that outside air in the outside air introduction chamber 18 can be introduced and cooling by the outside air is possible. Therefore, when the axial fan 16 is driven, outside air is sucked from the outside air introduction chamber 18 into the outside air discharge chamber 19 through the passages 20 of the radiator core 10a, and the outside air sucks the cooling tubes 8 and the radiation fins 9. Are cooled, and the cooling water circulating in the cooling tubes 8 is cooled.

[0006]

As described above, in the conventional construction machine, the radiator core 10a is installed in the accommodation room 15, and the outside air is introduced from the outside air inlets 17 of the upper partition 21 of the body. , An axial fan 16 is disposed in the outside air discharge chamber 19, and the cooling tubes 8, between the radiation fins 9.
While preventing the clogging between the eight, the overheating due to the deterioration of the cooling performance of the radiator core 10a is prevented. However, as shown in FIG. If it is set, the airflow is turbulent in the outside air introduction chamber 18, and there is a concern that the suction flow rate and the flow velocity of each passage 20 may be lost. As a result, the cooling efficiency may be reduced.

Therefore, the present invention has a technical problem to be solved in a construction and civil engineering machine so that outside air can be smoothly introduced into each passage of the cooling core. An object of the present invention is to solve the problem.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and a housing is formed by partitioning the inside of an airframe with a partition, and a cooling core is installed at a center side of the housing. And forming an outside air introduction chamber and an outside air discharge chamber before and after the cooling core, further opening an outside air introduction port communicating with the outside in an upper partition wall of the outside air introduction chamber, and axially flowing the outside air into the outside air discharge chamber. In a construction and civil engineering work machine configured to allow a fan to be installed to pass outside air from the outside air introduction chamber to the outside air discharge chamber through the fins of the cooling core, the cooling core is formed of a flat tube and vertically spaced. And a plurality of cooling tubes arranged vertically, and radiating fins for connecting vertically adjacent cooling tubes vertically with an interval in the tube longitudinal direction. The inclination of the cooling tube is set such that the outside air introduction port side end is higher than the outside air discharge chamber side end by a predetermined height so that the entrance of the outside air between at least the upper tubes faces the outside air introduction port obliquely from below. Constructed construction
Provided is a civil engineering work machine, furthermore, a compartment is formed by partitioning the inside of the machine with a partition wall, a cooling core is installed at the center side of the compartment, and an outside air introduction chamber and an outside air discharge chamber are provided before and after the cooling core. Forming a compartment, and further opening an outside air introduction port communicating with the outside in the upper partition of the outside air introduction chamber, installing an axial fan in the outside air discharge chamber, and passing between the fins of the cooling core from the outside air introduction chamber. In the construction and civil engineering work machine configured to allow the outside air to pass through the outside air discharge chamber, the cooling core, a large number of cooling tubes arranged at intervals in the left and right direction, cooling tubes adjacent in the left and right direction Radiation fins connected to the cooling tube in the longitudinal direction at right and left intervals, and the inclination of each radiation fin with respect to the cooling tube is such that the outside air inlet side end is greater than the outside air discharge chamber side end. Set Jodaka highly so as there is provided a configuration the construction and civil engineering work machine so as to at least face the outside air passage inlet between the top of the cooling tube is the external air inlet port obliquely from below.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG.

FIG. 1 shows an embodiment in which the invention described in claim 1 is applied to a construction machine having a working machine such as a blade or shovel. The same components as those of the prior art described in FIGS. 3 to 5 in this embodiment are denoted by the same reference numerals.

As shown in FIG. 1, the inside of the rear portion of the upper revolving unit 30 of the construction machine is partitioned by partitions
A cooling core 10 having a structure as shown in FIG. 4 is arranged in the storage chamber 15 as a radiator core 10a. The radiator core 10a is formed so as to cross the housing chamber 15 vertically and horizontally, and when installed at the center side of the housing chamber 15, partitions the outside air introduction chamber 18 behind the radiator core 10a and forwardly. The outside air discharge chamber 19 is configured to be partitioned, and the outside air introduction chamber 1 of the upper partition 11 is formed.
In the upper partition 21 forming the ceiling of No. 8, a number of outside air introduction ports 17 are formed in a slit shape for introducing outside air. The axial flow fan 16 is installed in the outside air discharge chamber 19, and passes between the adjacent cooling tubes 8a, 8a and between the adjacent radiation fins 9, 9.
As 0, it is installed so as to introduce outside air from the outside air introduction chamber 18 to the outside air discharge chamber 19, and is configured to cool each cooling tube 8a and each radiation fin 9 by outside air passing through the passages 20. In the present embodiment, the cooling tubes 8a of the radiator core 10a are provided.
Are arranged in multiple stages vertically and in two rows in front and back. The inclination of each cooling tube 8a is such that the outside air inlet side end 21 of the side tanks 6, 7 is on the side of the outside air discharge chamber. The passage 20 between the radiating fins 9 and 9 at least on the upper side is set so as to face the outside air inlet 17 from obliquely below. For this reason, the outside air introduced into the outside air introduction chamber 18 is smoothly sucked into each passage 20 without being disturbed and without stagnation.

Next, the operation will be described. When the axial fan 16 is operated, the atmosphere in the outside air introduction chamber 18 is initially sucked into each of the passages 20 by the negative pressure acting on each passage 20, and the radiator core 10 a Is cooled, but when the intake air causes a fluid inertia in the outside air flowing from the outside air inlet 17 toward each passage 20, the outside air flows into each passage 2 on the upper side as shown by an arrow in FIG.
It proceeds linearly toward the entrance of 0 ... Therefore, the outside air is smoothly sucked into each of the passages 20, in particular, the passages 20 on the upper side. Further, each passage 20 on the bottom side of the outside air introduction chamber 18 also faces obliquely upward, so that the outside air heading to the bottom side by the throttle of each outside air introduction port 17 is smoothly passed through the middle and low passages 20. Sucked into.

Therefore, the rate of cooling the radiator 5 by the outside air is greatly increased as compared with the conventional case, and the flow rate and
The flow rate also increases significantly compared to the conventional case. Therefore, the cooling efficiency of the radiator core 10a is improved only by setting the inclination of the cooling tubes 8a as described above, and the engine of the construction machine in which the load fluctuation is severe, the load is high, and the frequency of use is high, and the frequency of use is high, is not caused by overheating. Can be protected.

FIG. 2 shows an embodiment in which the invention described in claim 2 is applied to an oil cooler. In this embodiment, the same components as those of the prior art described with reference to FIG. 3 are denoted by the same reference numerals.

As shown in FIG. 1, the inside of the rear portion of the upper swing body 30 is partitioned by partitions 31 to 34 to form a housing chamber 35, and a cooling center having a structure as shown in FIG. The core 5a is provided as a cooling core for an oil cooler. The cooling core 5a is similar to the above-described embodiment.
The storage chamber 35 is formed in advance so as to traverse the storage chamber 35 vertically and horizontally, and is installed at the center of the storage chamber 35 so that the storage chamber 35 can be divided into an outside air introduction chamber 37 and an outside air discharge port 38. Divided into Further, in the upper partition wall 37 constituting the ceiling of the outside air discharge chamber 40 of the upper partition wall 31, a large number of slit-shaped outside air introduction ports 38 are formed at intervals, and the outside air discharge chamber 37 is provided with the outside air introduction chamber 36. Outside air discharge chamber 37 from the side
An axial fan 39 is installed so as to draw in outside air.

The cooling core 5a comprises an upper tank 1 and a lower tank 2 which are vertically connected by a cooling tube 3, and the cooling tubes 3, 3 are connected by radiation fins 4,.
The inclination of each radiating fin 4 is such that the outside air inlet side end 50 of each radiating fin 4 is higher than the outside air discharge chamber side end 51 by a predetermined height with respect to the cooling tubes 3 extending vertically. The passage 41 between the upper radiating fins 4 is set so as to face the outside air inlet 38 from obliquely below. For this reason, the intake of the outside air into each passage 41 becomes smooth, and the cooling efficiency of the cooling core 5a is improved as much as possible.

Therefore, also in this embodiment, the cooling core 5a of the oil cooler is efficiently cooled by the outside air,
Various actuators such as a working hydraulic circuit and a hydraulic cylinder of the construction machine are protected from abnormal wear.

As described above, in each of the above-described embodiments, the radiator core 10a and the cooling core 5a of the oil cooler have been described to be efficiently cooled. However, the cooling core of the intercooler is also basically the same as the radiator 10a and the cooling core 5a. The structure is the same.

Therefore, similarly to the radiator core 10a or the cooling core 5a of the oil cooler, the cooling core 5a of the intercooler is arranged in the accommodation chamber similarly to the above embodiments, and the cooling tubes 3,. Radiation fins 4 ...,
If the inclination of 9 is set in the same manner as in each of the above embodiments, it is possible to improve the cooling efficiency of the intake air and the charging efficiency.

In this embodiment, each cooling core has been described as being housed in an individual housing chamber.
Each cooling core may be juxtaposed. In that case, each of the cooling cores can be cooled by one axial flow fan 16 and 39, so that space saving can be achieved.

[0021]

According to the first aspect of the present invention, as described in detail in the above embodiment, each cooling tube of the cooling core is formed of a flat tube, and the inclination of each cooling tube with respect to the horizontal plane is adjusted by the outside air inlet. The side end is set to be higher than the outside air discharge chamber side end by a predetermined height. For this reason, it is possible to smoothly pass the outside air serving as a cooling medium without disturbance, and it is possible to suppress a decrease in the amount and speed of the outside air passing therethrough as compared with the conventional case, thereby greatly improving the cooling efficiency of the cooling core. It is an invention that has a very great effect, such as being able to do so.

According to a second aspect of the present invention, as described in detail in the above embodiment, the inclination of each radiating fin with respect to the horizontal plane is adjusted such that the outside air inlet side end is at a predetermined height from the outside air discharge chamber side end. It is set to be higher. For this reason, it is possible to smoothly pass the outside air serving as a cooling medium without disturbance, and it is possible to suppress a decrease in the amount and speed of the outside air passing therethrough as compared with the conventional case, thereby greatly improving the cooling efficiency of the cooling core. It is an invention that has a very great effect, such as being able to do so.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side sectional view showing one embodiment of the present invention and showing one embodiment applied to a radiator of a construction machine that excavates with a working machine such as a blade or a shovel.

FIG. 2 is a partially cut-away side sectional view showing one embodiment of the present invention and showing one embodiment applied to an oil cooler of a construction machine excavated by a working machine such as a blade or shovel.

FIG. 3 is a partially cutaway perspective view showing a structure of a radiator having tanks on upper and lower sides.

FIG. 4 is a partially cutaway perspective view showing a structure of a radiator having tanks on left and right sides.

FIG. 5 is a partially cut-away side sectional view showing an arrangement of a radiator and an axial fan of a construction machine for excavating by a conventional working machine such as a blade and a shovel.

[Explanation of symbols]

 5a Radiator core 8a Cooling tube 9 Radiation fin 10a Cooling core 11 Partition wall 12 Partition wall 13 Partition wall 14 Partition wall 15 Housing chamber 16 Axial fan (cooling fan) 17 Outside air inlet 18 Outside air introduction chamber 19 Outside air discharge chamber 20 Passage 21 Upper partition 31 Radiator The outside air inlet side end of the core 32 The outside air discharge chamber side end of the radiator core

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02B 77/13 F02B 77/13 M F28F 9/00 321 F28F 9/00 321

Claims (2)

[Claims] An interior chamber is partitioned by a partition to form an accommodation chamber, a cooling core is installed at the center side of the accommodation chamber, and an outside air introduction chamber and an outside air discharge chamber are defined before and after the cooling core. Further, an outside air introduction port communicating with the outside is opened in an upper partition wall of the outside air introduction chamber, and an axial fan is installed in the outside air discharge chamber so that the outside air introduction chamber passes through the fins of the cooling core from the outside air introduction chamber. In the construction and civil engineering work machine configured to allow outside air to pass through, the cooling core, a number of cooling tubes made of flat tubes and arranged at intervals in the vertical direction, and cooling tubes adjacent to each other in the vertical direction Radiation fins connected vertically at an interval in the longitudinal direction of the tube, and furthermore, the inclination of each cooling tube with respect to the radiation fins is such that the outside air introduction port side end is greater than the outside air discharge chamber side end. At least the upper portion of the construction and civil engineering work machines outside air passage inlet between the tubes is characterized by being configured so as to face the outside air inlet obliquely from below and set Jodaka is high. 2. A housing is formed by partitioning the inside of the machine with a partition, and a cooling core is installed at the center side of the housing, and an outside air introduction chamber and an outside air discharge chamber are formed before and after the cooling core. Further, an outside air introduction port communicating with the outside is opened in an upper partition wall of the outside air introduction chamber, and an axial fan is installed in the outside air discharge chamber so that the outside air introduction chamber passes through the fins of the cooling core from the outside air introduction chamber. In the construction and civil engineering work machine configured to allow outside air to pass through, the cooling core is formed by a plurality of cooling tubes arranged at intervals in the left-right direction and the cooling tubes adjacent to each other in the left-right direction. Radiation fins connected to the left and right at intervals in the direction, the inclination of each radiation fin with respect to the cooling tube is higher by a predetermined height at the outside air inlet side end than at the outside air discharge chamber side end. What At least construction and civil engineering work machines outside air passage inlet between the top of the cooling tube is characterized by being configured so as to face the outside air inlet from the obliquely downward Configure.