JP2001355255A - Air cleaner of construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of reducing a loss due to an occurrence of vortex flow. SOLUTION: In construction machinery, an air cleaner is disposed in an air flow for cooling a radiator or the like, and an air cleaner body or a cover is installed thereon to streamline the outside profile thereof so as to reduce an air resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field related to an external shape of an air cleaner of a construction machine.

[0002]

2. Description of the Related Art Fine dust is suspended in the atmosphere, and the exhaust gas of the engine itself contains fine carbon particles. Further, construction machines often work in places where there is a lot of dust such as dust. Therefore, a construction machine using an engine (a diesel engine or a gasoline engine) uses an air cleaner for purifying intake air in order to improve combustion efficiency and exhaust characteristics of the engine. However, construction machines are often arranged with an air cleaner in a flow path of cooling air due to limited arrangement space.

FIG. 7 is a diagram showing an arrangement of a conventional air cleaner. In FIG. 7, a counterweight 51 is arranged at the rearmost part of the construction machine, and an engine 52 is arranged slightly before (left side in the figure). An air-cooling fan 53 is attached to one output shaft of the engine 52, and a radiator 54 and an oil cooler 55 are arranged in front of the fan 53 (downward in the figure). The air cleaner 60 is arranged in a relatively close space in front of the oil cooler 55. This is because the exhaust port 58 of the exhaust gas muffler 58 from the engine 52 is provided in the space on the opposite side (upper side in the figure).
a, the air inlet of the engine 52 needs to be arranged at a position distant from the outlet 58a, while the air intake of the engine 52 is arranged at a position close to the engine 52.
Is required to be shorter. Therefore, the air cleaner 60 is disposed upstream of the air flow for cooling the radiator 54 and the oil cooler 55.

[0004]

As described above, in a conventional construction machine or the like, the air cleaner uses the radiator 5.
4 and an air flow path for cooling the oil cooler 55 (path indicated by an arrow in the figure). Further, the conventional air cleaner 60 has a cylindrical shape. FIG.
As shown in (1), when the cylindrical object 60 is arranged in the airflow of the steady flow 61, the flow stagnates near the center line at the front of the cylinder, and a vortex occurs at the rear, resulting in energy loss. Therefore, it is necessary to increase the fan 53 by this loss or to rotate the fan 53 at high speed. The present invention has been made under the above-described background, and has as its object to provide an air cleaner in which a loss due to generation of a vortex flow is reduced.

[0005]

The present invention employs the following means to solve the above-mentioned problems. That is, claim 1
The described invention is characterized in that an air cleaner main body or a cover is provided to make the external shape streamlined to reduce air resistance.

According to a second aspect of the present invention, in the first aspect, a streamlined cover is provided on the upstream side, the downstream side, or both of the air cleaner main body.

[0007]

FIG. 1 shows an embodiment of the present invention in which covers are provided on both sides. 3 to 6 show modified examples. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the air cleaner main body 11 has the same configuration as the conventional air cleaner 60 and has a cylindrical shape.
A streamlined cover 12 is provided on the upstream side of the airflow of the air cleaner main body 11 and a streamlined cover 13 is provided on the downstream side thereof, so that the airflow becomes a steady flow without vortices as shown in FIG. The streamlined covers 12 and 13 are formed of a resin material such as plastic having a small coefficient of friction or a metal plate, and may be fixed with an adhesive or a means such as a tack. Further, the outer shape itself of the case of the air cleaner may be configured in a streamlined manner.

FIG. 3 shows an example in which a streamlined cover 15 is provided on the downstream side (or upstream side). The cover 15 is formed in a quadrangular pyramid shape, and the side walls 11 a and 11 of the air cleaner main body 11 are formed.
This is an example in which the generation of a vortex which may be caused by b is prevented. Although the cover 15 in FIG. 3 is formed as a flat surface to facilitate manufacture, a part or the entire surface may be formed as a curved surface.
FIG. 4 shows an example in which the side surface is formed with a curved surface.

FIG. 5 shows an example in which the air cleaner main body 11 is arranged at a corner of a wall. When the cylindrical air cleaner main body 11 is disposed at the corner, a stagnant flow and a vortex flow occur in the air flow before and after the air cleaner main body 11, and a significant energy loss occurs in the air flow. To prevent this, substantially triangular cylindrical covers 17 and 18 are arranged to make the overall shape streamlined. The air flow when the covers 17 and 18 are provided is indicated by solid arrows in the figure. As described above, the streamlined cover is appropriately deformed according to the airflow at the place where the streamlined cover is arranged.

FIG. 6 shows an example in which the device is arranged so as to be in contact with a wall. Also in this case, a stagnant flow and a vortex flow occur in the air flow before and after that, and a significant energy loss occurs in the air flow. By providing covers 19 and 20 that make the flow streamline before and after the air cleaner main body 11, generation of a stagnant flow and a vortex flow is prevented. The air flow in this case is indicated by a solid arrow in the figure.

As described above, in this embodiment, the air cleaner body is formed in a streamlined shape, or a cover is provided to make the external shape streamlined, thereby reducing the air resistance. Therefore, even if the air cleaner is arranged in the air flow path for cooling the radiator or the oil cooler, by providing a streamlined cover for the air flow, or by making the air cleaner body a streamlined type, the air cleaner is almost the same as when no air cleaner is present. A similar steady airflow is obtained. As a result, the radiator and the like can be sufficiently cooled without using a particularly large fan mounted on the output shaft of the engine. That is, there is an effect that the fuel efficiency of the engine and the performance of the heat balance can be improved.

The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and changes in the design and the like may be made without departing from the gist of the present invention. Even if there is, it is included in the present invention.

[0013]

As described above, according to the structure of the present invention, when an air cleaner is arranged in an air flow path for cooling a radiator or an oil cooler, energy loss of the air flow does not occur. There is an effect that the fuel efficiency of the engine and the performance of the heat balance can be improved as compared with the technology. As a result, an effect is obtained that the range in which the air cleaner is disposed can be selected.

[Brief description of the drawings]

FIG. 1 is an example in which a triangular cylindrical cover is provided before and after a flow in an embodiment of the present invention.

FIG. 2 shows the steady airflow of FIG.

FIG. 3 is an example in which a quadrangular pyramid-shaped cover is provided.

FIG. 4 is an example in which a side surface is formed by a curved surface in the cover of FIG. 3;

FIG. 5 shows an example in which an air cleaner main body is provided at a corner of a wall.

FIG. 6 shows an example in which an air cleaner main body is provided close to a wall.

FIG. 7 is a view showing an arrangement of a conventional air cleaner.

FIG. 8 shows a state of air flow when a conventional air cleaner is used.

[Explanation of symbols]

 11 Air cleaner body 12-20 Air cleaner cover

Claims (2)

[Claims] 1. A construction machine in which an air cleaner is arranged in an air flow for cooling a radiator or the like, wherein an air cleaner main body or a cover is provided to make the external shape streamlined to reduce air resistance. Machine air cleaner. 2. The air cleaner for a construction machine according to claim 1, wherein a streamlined cover is provided on an upstream side, a downstream side, or both of the air cleaner main body.