KR20120085618A - an Engine Room Cooling Apparatus for a Construction Heavy Equipment - Google Patents

Abstract

PURPOSE: A device for cooling an engine room of construction heavy equipment is provided to effectively cool heating devices by increasing air volume of an oil cooler fan while reducing the pressure of the engine room. CONSTITUTION: A device for cooling an engine room of construction heavy equipment comprises an exhaust fan(501) and a counterweight(600). The pressure of the engine room is reduced and a cooling air flow increases by discharging suction air to the exhaust fan through an oil cooler fan(114) and a radiator fan(115). The exhaust fan and an opening(134) are installed on a side facing the counterweight. An exhaust space(601) facing the opening is formed in the counterweight. Exhaust air sucked into the exhaust space through the opening is discharged to an upper part of the exhaust space.

Description

Engine Room Cooling Apparatus for a Construction Heavy Equipment}

The present invention relates to an engine room cooling apparatus for heavy construction equipment, and more particularly, to discharge the air sucked by the radiator fan and the oil cooler fan to an exhaust fan dedicated to exhaust to lower the pressure in the engine room and increase the amount of cooling air. It is about.

1 is a side view of an excavator, which is one of the heavy construction equipment to which the present invention relates, and FIG. 2 is a block diagram of an engine and a hydraulic system of the excavator.

1 and 2, reference numeral 101 denotes an upper swinging body, 102 a lower traveling body, 103 a work machine, 104 an engine room, 141 an engine hood cover, 140 a counter weight, and 118 a cab.

In the excavator shown in FIGS. 1 and 2, the upper pivot body 101 can pivot left and right about the vertical axis 8.

In addition, the engine room 104 includes the engine 105, the radiator 113, the radiator fan 115, the oil cooler 112, the oil cooler fan 114, the main pump 106, and the small oil pump illustrated in FIG. 2. Various devices for driving the work machine 103 of FIG. 1, such as the 120, 121, the main control valve 110, and the oil tank 117, are mounted.

In the excavator, the radiator 113 cools the coolant of the engine, and is cooled by the radiator fan 115, and the radiator fan 115 is mounted and driven by the engine 105 and driven by a hydraulic motor. There are two ways of doing this.

2 shows a case in which the radiator fan 115 is driven by the hydraulic motor 122.

The oil cooler fan 114 is usually driven by the hydraulic motor 123.

The engine 105 drives the oil pump 121 for driving the main pump 106 and the oil cooler fan 114, and the oil pump 120 for driving the radiator fan 115.

The main pump 106 sucks the working oil from the oil tank 117 and discharges it to the pipe 109, and the discharged oil is sent to the main control valve 110 (MCV-Main Control Valve), and the work machine 103 as necessary. Is sent to the actuator 111 of.

The actuator 111 includes a boom cylinder 9, an arm cylinder 11, a bucket cylinder 13, and the like illustrated in FIG. 1.

Since the oil discharged from the main control valve 110 is a high temperature, it is sent to the oil cooler 112 for cooling to cool, and the oil from the oil cooler 112 passes through the conduit 116 to the oil tank 117. It is recovered.

Figure 3 is a side view showing the configuration of the engine room cooling apparatus of the heavy construction equipment according to the prior art, Figure 4 is a plan view showing the configuration of the engine room cooling apparatus of heavy construction equipment according to the prior art.

3 and 4, the engine room of the heavy construction equipment includes an engine 105, a cooling device, a radiator 113, an air cleaner 303 for intake, and a silencer that emits exhaust gas to reduce noise. 304 are mounted, usually these are individually installed and surrounded by an outer wall 305.

The outer wall 305 is formed with a plurality of openings 306-1 to 3, 307-1 to 4, and 401-1 to 5 for discharging air.

The radiator fan 115 sucks air from the outside through the radiator 113 and cools the engine coolant flowing in the tube as the air passes through the radiator 113, and then the air is cooled by the engine 105. It is sent to the surroundings to cool the engine body, and after cooling the engine body, it is discharged out of the outer wall 305 through the openings 306, 307, 401 of the outer wall 305.

In the engine room of the conventional heavy construction equipment, air is introduced into the outer wall 305 by the force of the radiator fan 115 and discharged out of the outer wall 305 through the openings 306, 307, 401.

Figure 4 is a plan view of the engine room of the heavy construction equipment according to the prior art, showing the flow of air.

In FIG. 4, reference numeral 401 is commonly referred to as “grill”, and means a panel having many small holes, which are not numbered one by one.

Recently, the noise pollution of heavy construction equipment has risen, and the noise regulation of the construction heavy equipment driven by the engine such as an excavator is being tightened.

It is most effective to store the engine in a confined space, but it is difficult to cool the engine, so that the noise of the heavy construction engine does not leak out.

In other words, in order to cool the engine, air must be sucked from the outside into the engine room, and after cooling the engine, the air inside the engine room must be discharged to the outside again. It should be provided on the outside wall of the room.

However, when the opening is formed in the outer wall of the engine room, the noise is discharged to the outside, so it is extremely difficult to satisfy both requirements at the same time, and accordingly, the noise leaking from the engine room cannot be sufficiently reduced.

On the other hand, if the openings 306 and 307 formed with the large area of the engine room outer wall 305 are made smaller than the wall holes of the grill 401, the noise can be reduced, but the area of the openings 306 and 307 of the outer wall 305 can be made smaller. This increases the pressure in the engine compartment because the resistance to air flow increases.

As the pressure inside the engine room is increased, the back pressure of the oil cooler fan 114 and the radiator fan 115 is increased, and the efficiency of the oil cooler fan 114 and the radiator fan 115 is reduced.

5 shows a graph of fan characteristics according to the prior art.

As shown in FIG. 5, the flow rate of the fan decreases as the back pressure increases, and when the outlet is completely blocked, the flow rate becomes zero and the back pressure becomes the maximum value.

Usually, some back pressure Pa cannot be avoided, and operation is performed by the flow volume Q corresponding to it.

If the air flow rate is insufficient, the radiator 113 may not completely cool the cooling water, the engine 105 may overheat, or the temperature inside the engine room may increase, resulting in a high temperature of the accessory of the engine 105. In some cases, a fire may occur.

Also, the noise is not only the engine 105, but the noise from the fans 114 and 115 is louder and cannot be solved by surrounding the engine 105 alone.

The prior art to reduce the noise of the fans 114, 115 installed in the engine room has been to reduce the speed of the fans 114, 115 and increase the size of the radiator 113.

However, such a prior art has a problem that a large space is required, resulting in high cost.

The present invention has been devised in view of the above-described conventional situation, and its purpose is to make it possible to efficiently cool an engine inside an engine room at a lower cost, while reducing the noise generated in the engine room. It is to provide an engine room cooler for heavy equipment.

Engine room cooling apparatus of the heavy equipment of the present invention for achieving the above object is to reduce the noise by storing the equipment that causes the noise of the engine, radiator fan, silencer, hydraulic pump, oil cooler fan in an almost closed engine room. It is possible to, but the radiator fan and the oil cooler fan to discharge the air sucked into the exhaust fan dedicated to exhaust to lower the pressure in the engine room and increase the amount of cooling air.

In the engine room cooling apparatus of the heavy construction apparatus of the present invention, the exhaust fan and its opening are installed on the surface facing the counterweight behind the engine room, and the exhaust weight forms an exhaust space corresponding to the opening, and exhausts through the opening. The discharge air entering the space may be configured to discharge in an upper direction of the exhaust space.

In addition, the engine room cooling apparatus of the heavy equipment of the present invention forms an opening in a portion in contact with the counter weight behind the engine room, and installs the exhaust fan inclined inside the counter weight so that the air in the engine room is upwardly directed to the counter weight. It can be configured in the form of discharge.

In addition, the engine room cooling apparatus of the heavy equipment of the present invention can be configured in the form installed in the engine hood that the exhaust fan is installed to be opened and closed in the engine room.

According to the engine room cooling apparatus of the heavy equipment of the present invention, it is possible to configure the engine room in a closed type, thereby reducing the noise of the engine room, lowering the pressure of the engine room and increasing the air volume of the radiator fan and the oil cooler fan. Since it is possible to efficiently cool the heat generators in the engine room, including the engine and the silencer, it is possible to obtain the effect of greatly improving the durability and commerciality of the heavy construction equipment.

1 is a side view of an excavator that is one of the heavy construction equipment to which the present invention relates
2 is an engine and hydraulic system configuration diagram of the excavator
Figure 3 is a side view showing the configuration of the engine room cooling apparatus of construction equipment according to the prior art
Figure 4 is a plan view showing the configuration of the engine room cooling apparatus of heavy construction equipment according to the prior art
5 is a fan characteristic graph according to the prior art
6 is a side view showing the configuration of the first embodiment of the present invention,
7 is a plan view showing the construction of the first embodiment;
8 is a fan characteristic graph according to the present invention
9 is a side view showing the construction of a second embodiment of the present invention;
Fig. 10 is a plan view showing the construction of the second embodiment.
11 is a front view showing the construction of the third embodiment of the present invention.
12 is a plan view showing the construction of the third embodiment;
Fig. 13 is a side view showing the construction of the third embodiment;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

Engine room cooling device of the heavy equipment of the present invention to reduce the noise by storing the equipment that causes the noise of the engine, radiator fan, silencer, hydraulic pump, oil cooler fan in an almost sealed engine room, the radiator The air sucked by the fan and the oil cooler fan is discharged to the exhaust fan for exclusive use of the exhaust to lower the pressure in the engine room and increase the cooling air volume.

In the engine room cooling apparatus of the heavy construction apparatus of the present invention, the exhaust fan and its opening are installed on the surface facing the counterweight behind the engine room, and the exhaust weight forms an exhaust space corresponding to the opening, and exhausts through the opening. The discharge air entering the space may be configured to discharge in an upper direction of the exhaust space.

In addition, the engine room cooling apparatus of the heavy equipment of the present invention forms an opening in a portion in contact with the counter weight behind the engine room, and installs the exhaust fan inclined inside the counter weight so that the air in the engine room is upwardly directed to the counter weight. The exhaust fan may be configured to have a shape of 20 ° to 45 ° with respect to the vertical surface of the counterweight.

In addition, the engine room cooling apparatus of the heavy equipment of the present invention can be configured in the form installed in the engine hood that the exhaust fan is installed to be opened and closed in the engine room.

FIG. 6 is a side view showing the configuration of the first embodiment of the present invention, and FIG. 7 is a plan view showing the structure of the first embodiment. The principle of the present invention will be described with reference to FIGS. 6 and 7. Is as follows.

As shown in the first embodiment of FIGS. 6 and 7, the engine 105, the radiator 113, the radiator fan 115, the oil cooler 112, the oil cooler fan 114, and other accessories are all one engine. Housed in room 510.

The engine room 510 is provided with an air inlet opening 133 on the front side of the radiator 113 and an air inlet opening 132 on the front surface of the oil cooler 112, and has an opening on the wall in contact with the counterweight 600. 134 and another fan 501 are provided.

And other than that, it is almost sealed, and noise can leak to the outside at the minimum.

The radiator 113 and the oil cooler 112 use a so-called suction fan that inhales external low temperature air to increase the cooling efficiency.

The other exhaust fan 501 serves to discharge the air in the engine room 510 as a discharge type fan.

Accordingly, the air sucked from the radiator 113 and the oil cooler 112 is forcibly discharged by the fan 501, and the air discharged through the opening 134 in which the exhaust fan 501 is installed is counterweight 600. Guided to the exhaust space 601 formed inside of the discharged in the upper direction.

When the discharged air is discharged in the horizontal direction, it is preferable to emit the air toward the upper direction because problems such as warming into the cap or adversely affecting the surrounding environment occur.

As shown in FIGS. 6 and 7, the exhaust space 601 has a smooth curved surface 602 to direct the flow of air upward, thereby reducing the back pressure applied to the exhaust fan 501 and This prevents noise from leaking out of the body in the horizontal direction.

On the other hand, since the exhaust fan 501 forcibly discharges the air inside the engine room 510, which is an enclosed space, the pressure in the room decreases, and when the pressure decreases, the balance point of the flow rate and the pressure as shown in the fan characteristic curve of FIG. Move to the point of Pb-Qb.

Therefore, the flow rate Qa is increased to Qb so that the cooling capacity of the radiator 113 and the oil cooler 112 is increased.

As described above, the engine room cooling apparatus of the heavy equipment of the present invention is capable of improving cooling performance while minimizing noise of the engine room 510.

9 is a side view showing the configuration of the second embodiment of the present invention, and FIG. 10 is a plan view showing the structure of the second embodiment.

9 and 10 accommodate the exhaust fan 501 inside the counter weight 906.

That is, in the second embodiment, the exhaust fan 501 is mounted at a certain range of angles (for example, 20 ° to 45 °) with respect to the vertical inner wall of the counter weight 906, and the internal air of the engine room 510. Is guided against the inner wall of the counter weight 906 and then discharged at a high speed toward the top direction at the outlet 907 formed at the top of the counter weight 906.

In the second embodiment, an exhaust flow path is formed by penetrating the counter weight 906 or a part of the counter weight is recessed, and the exhaust fan 501 may be installed inside the counter weight 906, and from the engine room cover. It may be installed to protrude obliquely.

When the exhaust fan 501 is installed obliquely protruding from the engine room cover, it is possible to further prevent the noise of the fluid due to the collision of the exhaust wall with the exhaust wall inner side of the counter weight 906 side.

11 is a front view showing the configuration of the third embodiment of the present invention, FIG. 12 is a plan view showing the configuration of the third embodiment, and FIG. 13 is a side view showing the configuration of the third embodiment. It is.

In the third embodiment of FIGS. 11 to 13, the exhaust fan 501 is accommodated in the engine hood 1142 installed in the engine room 510 so as to be opened and closed through the hinge 1143.

The engine 105 in the engine room 510 itself dissipates heat, so that the surrounding ambient air is directed upwards.

Therefore, it is the core of the third embodiment that the exhaust fan 501 is placed directly on the engine 105 to suck the heat emitted from the engine 105 with high efficiency. ) Is a valid form when it cannot be stored.

In recent years, since the radiator 113 is gradually increasing to increase its cooling capacity and the height of the engine hood 1142 is also increasing, the conditions for securing a space for storing the exhaust fan 501 are gradually improving.

On the other hand, there is already an example in which the installation of the radiator 113 and the exhaust fan 501 is installed on the upper part of the construction equipment, but opening and closing up and down is inconvenient because the core is very heavy.

However, in the case of the third embodiment, since only the exhaust fan 501 is installed inside the engine hood 1142, the weight is light and the problems are small.

In recent years, exhaust gas regulations for heavy equipment engines have been tightened gradually, and Tier 4 (Interim), which enters into force in 2011, and Tier 4 (Final), which enter into force in 2014, must significantly increase cooling capacity.

However, it is extremely difficult to satisfy the noise regulation of heavy construction equipment and to increase the cooling capacity. In such a situation, the present invention can very easily clear the noise and exhaust gas regulation values.

The present invention described above is not limited to the above description, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be obvious to you.

105: engine
112: oil cooler
113: Radiator
114: Oil Cooler Fan
115: Radiator Fan
134: opening
501 exhaust fan
510: engine room
600, 906: Counterweight
601: exhaust space
602 surface
1142: engine hood

Claims (5)

The engine, radiator fan, silencer, hydraulic pump, and oil cooler fan can be stored in a nearly closed engine room to reduce noise, and the radiator fan and the oil cooler fan exhaust the inhaled air. An engine room cooling system for heavy construction equipment, characterized in that discharged to a dedicated exhaust fan to lower the pressure in the engine room and increase the cooling air volume.
The engine, radiator fan, silencer, hydraulic pump, and oil cooler fan can be stored in a nearly closed engine room to reduce noise, and the radiator fan and the oil cooler fan exhaust the inhaled air. The exhaust fan is discharged to a dedicated exhaust fan to reduce the pressure in the engine room and to increase the cooling air volume. The exhaust fan and its opening are disposed on a side facing the counterweight behind the engine room, and the counterweight corresponds to the opening. The engine room cooling apparatus of the heavy construction equipment, characterized in that for forming an exhaust space, the exhaust air entering the exhaust space through the opening to discharge in the upper direction of the exhaust space.
The engine, radiator fan, silencer, hydraulic pump, and oil cooler fan can be stored in a nearly closed engine room to reduce noise, and the radiator fan and the oil cooler fan exhaust the inhaled air. The exhaust fan is discharged to a dedicated exhaust fan to reduce the pressure in the engine room and increase the cooling air volume. An opening is formed in a portion of the engine room that is in contact with the counterweight. The engine room cooling apparatus of the heavy construction equipment, characterized in that to discharge the air in the upper direction of the counter weight.
The engine, radiator fan, silencer, hydraulic pump, and oil cooler fan can be stored in a nearly closed engine room to reduce noise, and the radiator fan and the oil cooler fan exhaust the inhaled air. It is discharged to a dedicated exhaust fan to lower the pressure in the engine room and increase the cooling air volume, and the exhaust chamber is installed in the engine hood that is installed inside the engine hood that is installed to open and close in the engine room .
The engine room cooling apparatus of claim 1, wherein the radiator fan and the oil cooler fan are installed to correspond to the radiator and the oil cooler to draw in air.

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