JP2002371844A - Cooling package for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling package for a construction machine capable of easily cleaning equipment such as a radiator and an oil cooler requiring cleaning without being obstructed by equipment such as an aftercooler and a condenser for an air conditioner even when such equipment is mounted. SOLUTION: A plurality of equipment 6, 7, 8, 9 requiring cooling are arranged in a flow passage of cooling air, and a plurality of equipment 6, 7 which are parts of them are arranged in parallel for the direction 11 of flow of cooling air. One or a plurality of other equipment 8, 9 are arranged in front of the equipment 6, 7 arranged in parallel, and at least one equipment 8, 9 among the other equipment 8, 9 is provided on a static member 15 through rotary joints 24, 35 so as to swing freely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling package for construction equipment such as a hydraulic shovel, a wheel loader, and a crane. The present invention relates to a cooling package having a disposed structure.

[0002]

2. Description of the Related Art Today, traveling construction machines such as hydraulic excavators and self-loaders, stationary construction machines such as cranes, etc.
Various construction machines are used in various fields such as construction sites, ports, and factories. The construction of these construction machines
For example, in a hydraulic shovel that is a traveling construction machine, FIG.
As shown in FIG. 1, a lower traveling body 1, an upper oscillating body 2 slidably disposed above the lower traveling body 1, and a working device 3 provided on the upper oscillating body 2 for performing various operations. It consists of parts. The engine 4 is installed in the upper rocking body 2
A device such as a hydraulic pump 5 is provided, and the working device 3 is operated by a hydraulic pressure generated by driving the hydraulic pump 5 by the engine 4.

[0003] Construction machines are generally used under severe environments such as excavation of rocks in dams, tunnels, rivers, roads and the like, and demolition of buildings and buildings. In such environments, the engine 4 and the hydraulic pump 5 are used. And the like, the load applied to the devices is high, which easily causes an increase in the engine temperature and an increase in the hydraulic oil temperature. For this reason, these construction machines are provided with a relatively large-capacity radiator or oil cooler (hereinafter, collectively referred to as a cooler) in the flow path of the cooling air generated by the fan of the engine 4, and the engine cools the engine by these coolers. Cooling water and hydraulic oil.

Further, since the construction machine is used in the above environment, it is inevitable that foreign matter such as dust flows from the outside together with the cooling wind. These foreign substances are caught and deposited on the core of the cooler, clogging the cooler and reducing the cooling capacity of the cooler. In particular, since the core of a recent cooler has a complicated fin structure to improve the cooling capacity, foreign matter tends to accumulate compared to the former cooler that used a simple plate fin structure. ing. Therefore, in order to prevent a decrease in the cooling capacity of the cooler, it is necessary to clean the cooler according to the degree of clogging.

[0005] As a method for cleaning the cooler, a method is generally used in which high-pressure air is blown against the core of the cooler to blow off and remove foreign matters adhering and deposited on the cooler. The high-pressure air is blown by an air nozzle, but a required space is required in front of the cooler to be cleaned in order to bring the air nozzle close to the core of the cooler. Without this space, it is difficult to perform efficient cleaning. For this reason, in order to improve the overall cooling capacity of the coolers, it is necessary to consider the cleanability of each cooler.

Here, the cooling package shown in FIG. 8 is provided in the engine room 2a in which the engine 4 in the upper rocking body 2 is arranged, and the fan 4 of the engine 4
The radiator 6 and the oil cooler 7 are arranged along the flow direction (indicated by an arrow 11) of the cooling air generated by a. Here, in particular, the radiator 6 and the oil cooler 7 are arranged in parallel in the flow direction of the cooling air. According to such an arrangement, a sufficient space can be secured on both front surfaces of the radiator 6 and the oil cooler 7, so that both the radiator 6 and the oil cooler 7 can be efficiently cleaned.

[0007]

In recent years, construction machines have tended to be equipped with an engine having an aftercooler in order to improve exhaust gas performance. The aftercooler is a cooler for the supercharged air supplied to the engine, and is provided between the supercharger and the intake pipe of the engine to suppress a rise in the temperature of the intake air due to the supercharge and reduce the combustion temperature. This has a function of suppressing the generation of NOx. Aftercoolers installed on construction machines
Since it is generally air-cooled, it is additionally arranged in the cooling air flow path in addition to the arrangement of the radiator and the oil cooler.

In recent years, in order to make the working environment of the operator more comfortable, not a few construction machines are equipped with an air conditioner in the operation room. Air conditioners require a condenser to cool the refrigerant, but this condenser also requires cooling, so in construction machinery equipped with an air conditioner,
Like the aftercooler, the condenser of the air conditioner is additionally arranged in the cooling air flow path.

FIG. 9 is a diagram showing a configuration of a conventional cooling package in which an aftercooler and a capacitor are additionally arranged in the arrangement shown in FIG. Here, by arranging the aftercooler 8 and the condenser 9 vertically in parallel with the flow direction of the cooling air,
In addition to reducing the overall size, the pressure loss in the flow direction of the cooling air is suppressed. However, when the aftercooler 8 and the condenser 9 are additionally arranged as described above, the front surfaces of the radiator 6 and the oil cooler 7 arranged in parallel are closed, and the access of the air nozzle to the radiator 6 and the oil cooler 7 at the time of cleaning is restricted. It hinders cleaning performance.

The present invention has been made in view of such problems, and even when equipment such as a condenser for an aftercooler or an air conditioner is installed, cleaning of a radiator, an oil cooler, or the like is performed without being obstructed by these equipment. An object of the present invention is to provide a cooling package for a construction machine, in which required equipment can be easily cleaned.

[0011]

To achieve the above object, the present invention is characterized in that a cooling package of a construction machine is provided with the following arrangement. That is, in the cooling package of the construction machine of the present invention, a plurality of devices requiring cooling are arranged in a flow path of the cooling wind, and some of the plurality of devices are arranged in parallel with the flow direction of the cooling wind. . One or more other devices are arranged on the front surface of the devices arranged in parallel, and at least one of the other devices is swingably provided on a stationary member via a rotary joint. .

[0012] With such a configuration, by rotating the swingably provided device, the front faces of the devices arranged in parallel are opened, and a sufficient space for cleaning is secured. The equipment that requires cooling here is
This concept includes devices that indirectly cool the internal fluid and the like, such as an oil cooler and an aftercooler, as well as devices that themselves are heating elements and need to be directly cooled.

Preferably, a plurality of the other devices are arranged in parallel in a direction perpendicular to the arrangement direction of the devices arranged in parallel. For example, when the devices arranged in parallel are arranged side by side in the cooling air flow path, the other devices are arranged in parallel in the vertical direction.
Thus, just by rotating one device that is swingably provided, the front surfaces of all the devices arranged in parallel are opened.

Further, it is preferable that the swingable direction of the swingably provided device is set to a horizontal direction. Thus, the rotating state can be held at an arbitrary position without using any special means, and the workability when opening the front faces of the devices arranged in parallel is improved, and the cleaning property is further improved. It is also preferable that the other device includes an air conditioner condenser, and at least the air conditioner condenser is provided to be swingable. Furthermore, it is preferable that the other device includes an aftercooler, and at least the aftercooler is provided so as to be swingable. The air conditioner condenser and the aftercooler are devices that are mounted as needed. However, by oscillatingly providing the devices, the devices arranged in parallel can be additionally mounted without deteriorating the cleaning performance. In addition, the above-mentioned devices arranged in parallel include:
It is preferable to include at least a radiator and an oil cooler, and more preferably, only a radiator and an oil cooler are arranged in parallel.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a cooling package of a construction machine as one embodiment of the present invention. INDUSTRIAL APPLICABILITY The present invention can be applied to various types of construction machines, such as hydraulic shovels, wheel loaders, bulldozers, and cranes, regardless of whether they are traveling or stationary. A description will be given of the case in which this is done.

As shown in FIGS. 1 and 2, the cooling package according to the present embodiment is provided in an engine room 2a in an upper rocking body 2 of a hydraulic shovel. In the present embodiment, a plurality of devices requiring cooling, that is, a radiator 6, an oil cooler 7, an aftercooler 8, and a condenser (air conditioner condenser) 9 are provided, and these devices are arranged in a cooling air flow path indicated by an arrow 11. I have. Each of these devices has a cooling core having a complicated fin structure. Engine cooling water, hydraulic oil, supercharged air, and refrigerant flow through the cooling cores of the devices 6 to 9, respectively. When cooling air passes through each cooling core, the engine cooling water, hydraulic oil, The supply air and the refrigerant are respectively cooled.

First, the overall arrangement will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the radiator 6 and the oil cooler 7 are arranged side by side in the cooling air flow direction indicated by an arrow 11 in a horizontal direction. Have been. Here, when viewed from the upstream side of the flow of the cooling air, as shown in FIG.
Is disposed, and an oil cooler 7 is disposed on the left side.
A shroud 14 is attached to a frame around the radiator 6 and the oil cooler 7 toward the downstream side in the flow direction of the cooling air. An engine fan (not shown) is provided at the downstream opening of the shroud 14.

On the other hand, the aftercooler 8 and the capacitor 9
The radiator 6 and the oil cooler 7 are arranged in front of each other (upstream of the flow of cooling air) in parallel in the vertical direction. Here, an aftercooler 8 is provided on the upper side, and a capacitor 9 is provided on the lower side. The clearances between the radiator 6, the oil cooler 7, the aftercooler 8, and the condenser 9 are minimum necessary for installation or maintenance so that the cooling air generated by the fan flows over the aftercooler 8 and the condenser 9 without leakage. Is set in the gap.

The engine room 2a is provided with a side door 2c that can be opened and closed. This side door 2c is
The cooling package is provided at a position facing the front, and is opened as needed, for example, when cleaning the cooling package described later. next,
The mounting structure of each device will be described. First, the radiator 6 and the oil cooler 7 are fixed to the floor surface 2b of the engine room 2a as shown in FIGS. Also,
Although not shown here, the radiator 6 and the oil cooler 7 are supported on a wall surface or the like of the engine room 2a via a plurality of support members and pipes. On the other hand, the aftercooler 8 and the condenser 9 are composed of columns 15, 1 provided on both left and right sides of the cooling core of the radiator 6 and the oil cooler 7, respectively.
6 and is supported.

Hereinafter, the mounting structure of the aftercooler 8 and the capacitor 9 will be described in more detail. First, Figure 1
The aftercooler 8 will be described with reference to FIGS. 3 and 5. The aftercooler 8 is provided in an intake passage of the engine, and as shown in FIG. 2, a pipe 17 a connected to an intake pipe of the engine and a pipe connected to a supercharger. 17b. The aftercooler 8 is configured by sandwiching the cooling core 20 between left and right frame portions 21 and 22. And
The pipes 17a, 17b are connected to connection sleeves 21a, 21b formed on one frame portion 21 (the left side in FIG. 2). The pipes 17a and 17b are flexible rubber pipes, and especially near the connection with the sleeves 21a and 21b.
It is processed in a bellows shape to further increase flexibility. Since the intake air flowing through the inlet pipe 17b has a high temperature (about 150 ° C.) due to the compression by the supercharger, heat-resistant rubber is used particularly for the pipe 17b.

As shown in FIG. 3, the aftercooler 8 connects the frame 21 on the side where the pipes 17a and 17b are connected to a support (stationary member) 15 via a hinge (rotary joint) 24.
Attached to and supported. A handle 23 is attached to the other frame portion 22 of the aftercooler 8 as shown in FIGS. A locking tool 23 a is provided at the tip of the handle 23, and forms a locking mechanism together with the locked tool 25 attached to the support 16.

With such a configuration, when the locking member 23a and the locked member 25 are locked, the aftercooler 8 is connected to the column 1
Radiator 6 and oil cooler 7
Is placed in the vicinity of the front surface of the. In this state, even if the vibration accompanying the operation of the excavator is applied,
Since the locking member 23a and the locked member 25 are locked, the aftercooler 8 flutters due to the vibration caused by the operation of the hydraulic shovel, or the arrangement position of the aftercooler 8 with respect to the flow direction of the cooling air changes, thereby changing the position of the aftercooler 8. The cooling efficiency does not decrease.

Then, by turning the handle 23, the locking member 23
By releasing the lock on the locked member 25, the aftercooler 8 is brought into a cantilever state by the support column 15, and can freely swing in the horizontal direction around the hinge 24 as shown in FIG. Become. At this time, when the aftercooler 8 swings, the connected pipes 17a and 17b also deform and move in accordance with the swing of the aftercooler 8, but the aftercooler 8 has a hinge provided on the connection side with the pipes 17a and 17b. Since it is configured to swing around the fulcrum 24, the pipes 17a, 17b
The impact on the environment is minimal.

Next, the capacitor 9 will be described with reference to FIGS. 1, 2, 4 and 6. As shown in FIG. 2, the condenser 9 has a configuration in which a cooling core 30 is sandwiched between left and right frame portions 31 and 32. Then, one frame 31 (FIG. 2)
(Left side in the drawing), two refrigerant hoses 18a and 18b connected to the air conditioner main body are rotatably connected. The refrigerant that has absorbed heat in the air conditioner main body flows from the air conditioner main body to the condenser 9 through one hose 18a, and the refrigerant cooled by the condenser 9 flows from the condenser 9 to the air conditioner main body through the other hose 18b.

As shown in FIG. 4, the hoses 18a, 18b
A bracket 34 is fixedly mounted on the frame 31 on the side where is connected, and this bracket 34 is a hinge (rotary joint) 35.
Is attached to the support (stationary member) 15 through the support.
The bracket 3 is also provided on the other frame 32 of the capacitor 9.
The bracket 36 has a handle 33 attached thereto.
Is attached. A locking tool 33a is provided at the tip of the handle 33, and constitutes a locking mechanism together with the locked tool 37 attached to the column 16.

With such a configuration, when the locking member 33a and the locked member 37 are locked, the capacitor 9 is connected to the column 15,
16 and is located on the front surface of the radiator 6 and the oil cooler 7. Then, by turning the handle 33 to release the locking of the locking member 33 a to the locked member 37, the capacitor 9 is in a cantilever state by the support column 15, and as shown in FIG. It can swing freely in any direction.

Next, the cleaning procedure of the cooling package configured as described above will be described with reference to FIGS. 1, 5, and 6. First, the side door 2c is opened, and the engine room 2a is opened. I do. Then, in the state shown in FIG. 1, high-pressure air is blown toward the aftercooler 8 and the condenser 9 from the opening formed by opening the side door 2c, and the aftercooler 8 and the condenser 9 are blown.
Foreign matter adhering to the cooling core is removed.

Next, the handle 23 of the aftercooler 8 is turned to release the lock by the locking member 23a and the locked member 25. Then, as shown in FIG. 5, the aftercooler 8 is rotated in the horizontal direction, and the upper portions of the front surfaces of the radiator 6 and the oil cooler 7 are opened. Subsequently, the handle 33 of the capacitor 9 is turned to unlock the locking member 33a and the locked member 37. Then, as shown in FIG. 6, the condenser 9 is also rotated in the horizontal direction, so that the radiator 6 and the oil cooler 7 are rotated.
Also open the lower part of the front of the. In this manner, according to the method of rotating in the horizontal direction, since gravity does not act in the rotating direction, the aftercooler 8 and the condenser 9 are held at the rotating position without using any special means. Can be kept.

In this manner, the front surfaces of the radiator 6 and the oil cooler 7 are opened by the horizontal rotation of the aftercooler 8 and the condenser 9, so that a sufficient space for cleaning is secured. By blowing high-pressure air in this state, foreign matters adhering and accumulating on the cooling cores of the radiator 6 and the oil cooler 7 can be easily removed.
After the cleaning is completed, the aftercooler 8 and the condenser 9 are rotated in the opposite directions to return to the original positions, respectively.
Operate 3, 33 to lock securely.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented with various modifications without departing from the spirit of the present invention. . For example, in the above embodiment, both the aftercooler 8 and the condenser 9 can be swung in the horizontal direction, but only one of them can be swung in the horizontal direction, and the other remains fixed in the arrangement position. It may be. Even in such a configuration, by rotating at least one of the aftercooler 8 and the condenser 9 in the horizontal direction, the front surfaces of both the radiator 6 and the oil cooler 7 partially open. The radiator 6 and the oil cooler 7 can be cleaned by blowing high-pressure air from the partially opened portion.

In the above embodiment, the radiator 6
Although the oil cooler 7 and the oil cooler 7 are arranged side by side in the horizontal direction, it is also possible to arrange the oil cooler 7 in the vertical direction. In this case, the swing direction of the aftercooler 8 and the condenser 9 may be horizontal as in the above-described embodiment, but the aftercooler 8 and the condenser 9 may be arranged in parallel in the horizontal direction so as to be able to swing vertically.

Further, in the above-described embodiment, the aftercooler 8 and the condenser 9 are arranged on the front of the radiator 6 and the oil cooler 7.
In addition to or in place of these, other equipment requiring cooling may be arranged. Again, at least one device is
The radiator 6 and the oil cooler 7 are swingable so as to open the front.

[0033]

As described above in detail, according to the cooling package for a construction machine of the present invention, at least one of a plurality of devices which need to be cooled and which are arranged in a flow path of the cooling air and which is arranged on a front side of the cooling air flow path. One can be rotated to open the front of the devices arranged in parallel on the back side, so that a sufficient space for cleaning can be secured on the front of the devices arranged in parallel on the back side, There is an effect that the devices arranged in parallel on the back side can be easily cleaned.

Therefore, in a structure in which devices requiring cleaning such as a radiator and an oil cooler are arranged in parallel, even when additional devices such as an aftercooler and a condenser of an air conditioner are additionally mounted, at least one of these devices is rotated. By doing so, it is possible to easily clean a device such as a radiator or an oil cooler that requires cleaning without being disturbed by these devices.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a cooling package according to an embodiment of the present invention.

FIG. 2 is a front view showing a configuration of a cooling package according to one embodiment of the present invention.

FIG. 3 is a view in the direction of arrows III-III in FIG. 1;

FIG. 4 is a view in the direction of arrows IV-IV in FIG. 1;

FIGS. 5A and 5B are diagrams showing a state of the aftercooler according to the embodiment of the present invention at the time of rotation, where FIG. 5A is a side view corresponding to FIG. 1 and FIG. 5B is a view corresponding to FIG. It is a VV direction arrow view.

FIGS. 6A and 6B are diagrams showing a state of the capacitor according to the embodiment of the present invention at the time of rotation, wherein FIG. 6A is a side view corresponding to FIG. 1 and FIG. It is a VI-VI direction arrow view.

FIG. 7 is a schematic side view illustrating a configuration of a hydraulic shovel as an example of a construction machine.

FIG. 8 is a top view illustrating a configuration example of a cooling package of the hydraulic shovel.

9 is a side view showing a configuration of a conventional cooling package when an aftercooler and a capacitor are additionally arranged in the arrangement of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper swinging body 3 Working device 2a Engine room 2c Side door 4 Engine 6 Radiator 7 Oil cooler 8 Aftercooler 9 Condenser 11 Cooling air 15,16 Support post (stationary member) 17a, 17b Pipe 18a, 18b Hose 24 Hinge ( Rotary joint) 35 Hinge (rotary joint)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (reference) F02B 29/04 F02B 29/04 K F28F 9/00 321 F28F 9/00 321 F term (reference) 2D015 CA02 3D038 AA00 AB09 AC02 AC11 AC20 3L065 AA03 AA06 AA09

Claims (5)

[Claims] 1. A cooling package for a construction machine having a structure in which a plurality of devices requiring cooling are arranged in a flow path of a cooling air, wherein a part of the plurality of devices are arranged in parallel with a flow direction of the cooling air. Another one or a plurality of devices are arranged on the front side of the devices arranged in parallel, and at least one of the other devices is swingably provided on a stationary member via a rotary joint. A cooling package for construction machinery. 2. The cooling package for a construction machine according to claim 1, wherein a plurality of the other devices are arranged in parallel in a direction perpendicular to an arrangement direction of the devices arranged in parallel. 3. The cooling package for a construction machine according to claim 1, wherein the swing direction of the swingably provided device is set to a horizontal direction. 4. The construction according to claim 1, wherein the other equipment includes an air conditioner condenser, and at least the air conditioner condenser is provided to be swingable. Machine cooling package. 5. The construction machine according to claim 1, wherein the other equipment includes an aftercooler, and at least the aftercooler is provided to be swingable. Cooling package.