JP2010156149A - Cooling apparatus for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the operation stop of an engine or the like caused by the overheat of a cooling apparatus. <P>SOLUTION: A centrifugal separation type air cleaner apparatus 12 is installed in front of the cooling apparatus 8 such as an oil cooler 9, a radiator 10 and an intercooler 11 installed in front of a cooling fan 7 to separate and remove dust in air flowing toward the cooling apparatus 8. The air cleaner apparatus 12 includes a plurality of cylindrical air cleaner single bodies 13, 13, ..., and the cylindrical air cleaner single bodies 13, 13, ... are arranged in a plurality of rows in vertical and lateral directions. Air suction pipes 14, 14, ... of the air cleaner single items 13, 13, ... are located in clearances between the adjacent air cleaner single bodies 13, 13, ... Dust exhaust pipes 18, 18, ... are connected to one dust accumulating pipe 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a construction machine cooling apparatus, and more particularly, to a construction machine cooling apparatus provided with a centrifugal air cleaner apparatus.

  Conventionally, an engine is installed in an engine room of a construction machine, and a hydraulic pump is connected to the engine. In addition, a cooling fan for introducing air (cooling air) into the engine room is provided in front of the engine, and further, an oil cooler for cooling hydraulic oil, a radiator for engine cooling water, and A cooling device having a heat exchanger such as an intercooler for a turbocharger is installed. Thereby, the cooling device is cooled by the air introduced into the engine room, and the temperature of engine cooling water, lubricating oil, or the like flowing through the piping in the cooling device is reduced.

However, in the cooling device, dust contained in the air may be clogged inside. In this case, not only the cleaning performance of the cooling device is deteriorated, but also the cooling device may overheat, and the engine and the machine such as the hydraulic pump may be stopped. Therefore, in order to improve the cleaning performance of the cooling device, a measure is taken such as installing an air filter in front of the cooling device to remove dust in the air toward the cooling device in advance (for example, Patent Document 1). And 2).
JP 2004-225278 A Japanese Patent Laid-Open No. 6-144022

  In the conventional cooling device, an air filter is installed in front of the cooling device. However, even when configured in this manner, the air filter may be clogged with dust. When the air filter is clogged with dust, the cleaning performance of the cooling device itself is improved. However, the air filter overheats and has the problem that the operation of the engine or the like stops as described above. It was.

  Therefore, a technical problem to be solved arises in order to prevent operation stop of the engine or the like due to overheating of the cooling device, and the present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is directed to heat of an oil cooler, a radiator and / or an intercooler installed in front of a cooling fan in an engine room. A construction machine cooling apparatus comprising an exchanger is characterized in that a centrifugal air cleaner device is attached in front of the cooling device so that dust in the air can be separated and removed by the air cleaner device. A cooling device for construction machinery is provided.

  According to this configuration, since the centrifugal air cleaner device is attached in front of the cooling device including a heat exchanger such as an oil cooler, a radiator and / or an intercooler, dust in the air toward the cooling device is It is removed by centrifuging while passing through the air cleaner device. This prevents dust from entering the inside of the cooling device.

  The invention according to claim 2 is characterized in that the air cleaner device comprises a plurality of cylindrical air cleaners, and the plurality of air cleaners are arranged in a plurality of rows in the vertical and horizontal directions. Provide cooling equipment for construction machinery.

  According to this configuration, since the plurality of air cleaners are arranged in a plurality of rows in the vertical and horizontal directions, the entire air cleaner device is made compact and the occupied space is reduced.

  According to a third aspect of the present invention, an air suction pipe is attached to the outer peripheral surface of the single cylindrical air cleaner, and the air suction pipe is disposed so as to be positioned in a gap between adjacent air cleaners. A cooling device for a construction machine according to claim 2 is provided.

  According to this configuration, the air suction pipe attached to a single cylindrical air cleaner is disposed in a gap (dead space) generated between adjacent air cleaners. Therefore, since the air suction pipe is installed using the dead space effectively, the installation space for the air cleaner device can be reduced accordingly.

  The invention according to claim 4 is characterized in that a dust discharge pipe is attached to an end surface of each of the plurality of air cleaners, and each dust discharge pipe is connected to a dust reservoir provided in common to the plurality of air cleaners. A cooling device for a construction machine according to claim 3 is provided.

  According to this configuration, since the dust discharge pipes attached to the single air cleaner are connected to the common dust reservoir, the dust separated from the individual air cleaners is separated into one dust reservoir via the dust discharge pipe. To be collected.

  According to the first aspect of the present invention, since dust can be prevented from entering the cooling device, it is possible to prevent the cooling device from being clogged with dust. Therefore, there is no possibility that the cooling device will overheat, and it is possible to prevent the engine or the like from being stopped due to overheating.

  According to the second aspect of the present invention, since the space occupied by the entire air cleaner device is reduced, in addition to the effect of the first aspect of the invention, the air cleaner device is installed in front of the cooling device even when the installation space in front of the cooling device is small. can do.

  In the invention described in claim 3, since the installation space of the air cleaner device is further reduced by installing the air suction pipe in the dead space, in addition to the effect of the invention of claim 2, the installation space of the air cleaner device is further reduced. It can be made even smaller.

  In the invention according to claim 4, since the dust separated from each air cleaner is collected in a common dust reservoir through the respective dust discharge pipes, in addition to the effects of the invention according to claim 2 or 3, The dust after separation can be processed at one place, and there is an advantage that the cleanability of the air cleaner device is improved.

  In order to achieve the object of preventing the engine from being stopped due to overheating of the cooling device, the present invention provides heat of an oil cooler, a radiator and / or an intercooler installed in front of a cooling fan in the engine room. In the cooling device for a construction machine including the exchanger, a centrifugal air cleaner device is attached in front of the cooling device, and the air cleaner device can separate and remove dust in the air.

  A preferred embodiment of the present invention will be described below with reference to FIGS. The present embodiment is applied to a hydraulic excavator in which an upper swing body is mounted on a lower traveling body so as to be capable of swinging. FIG. 1 is a plan view showing the upper swing body 1. As shown in the figure, a work machine 2 including a boom and an arm is attached to the front side of the upper swing body 1 so as to be vertically rotatable. A cab 3 is mounted on the other front side of the upper swing body 1 and an engine room 4 is provided behind the cab 3 (to the right in FIG. 1).

  An engine 5 is installed in the engine room 4, a hydraulic pump 6 is connected to one end of the drive shaft of the engine 5, and a cooling fan 7 is attached to the other end of the drive shaft. The cooling fan 7 forcibly introduces air a outside the engine room 4 into the engine room 4 to generate cooling air C.

  A cooling device 8 is provided in front of the cooling fan 7 (lower side in FIG. 1), and the cooling device 8 is disposed so as to face the front surface of the cooling fan 7. Therefore, the cooling device 8 is forcibly cooled by the cooling air C generated by the cooling fan 7.

  The cooling device 8 according to the present embodiment includes an oil cooler 9 for cooling hydraulic oil as a heat exchanger (cooler body), a radiator 10 for engine cooling, and an intercooler 11 for a turbocharger. A plurality of circulation pipes through which lubricating oil, engine cooling water, and combustion air flow are incorporated. Thereby, the lubricating oil, the engine cooling water, and the combustion air that circulate in the cooling device 8 are configured so as to reduce the temperature by the heat exchange with the cooling air C.

  A centrifugal air cleaner device 12 is attached in front of the cooling device 8. The air cleaner device 12 separates and removes dust (dust) contained in the air a by centrifugal force while rotating the air a in a tornado shape.

  As shown in FIG. 2, the air cleaner device 12 according to the present embodiment includes a plurality of cylindrical air cleaners (hereinafter referred to as “air cleaner units”) 13, 13. As shown in FIG. 3, the plurality of air cleaner units 13, 13... Are arranged in a plurality of rows in the vertical direction and the left-right direction, and there are gaps P, P between adjacent air cleaner units 13, 13. ... is formed.

  3, the air cleaner device 12 is composed of a total of nine air cleaner units 13, 13... Arranged in three rows in the vertical direction and four rows in the left-right direction. The number or arrangement number of 13... Is not limited to this, and can be arbitrarily set according to the size and installation conditions of the air cleaner device 12.

  Further, as shown in FIGS. 4 and 5, the cylindrical air cleaner unit 13 is provided with an air suction pipe 14 on the upper outer peripheral surface of each air cleaner unit 13, and the air suction pipe 14 is parallel to the axial direction of the air cleaner unit 13. It is arranged.

  Further, the front end portion of the air suction pipe 14 slightly protrudes from the front end surface of the air cleaner unit 13, and an air inlet 15 is formed at the front end of the air suction pipe 14. Further, the air suction pipe 14 is disposed so as to be positioned in gaps (dead spaces) P, P... Generated between the outer peripheral surfaces of the adjacent air cleaner units 13, 13.

  As shown in FIG. 2, air discharge pipes 16, 16... Having a predetermined length are horizontally provided on the rear end surfaces of the air cleaner units 13, 13. 13, 13...

  Therefore, as shown in FIG. 5, the front end side portion of the air exhaust pipe 16 extends horizontally in the dust separation chamber R inside the rear end face of the air cleaner unit 13, and the rear end side of the air exhaust pipe 16 The portion extends outside the rear end surface of the air cleaner unit 13 (on the cooling device 8 side). 2, the air discharge pipes 16, 16,... Are accommodated in a duct 17 interposed between the air cleaner units 13, 13,.

  Further, as shown in FIG. 3, dust discharge pipes 18, 18... Are attached to the lower portions of the front end surfaces of the air cleaner units 13, 13. The shape of the dust discharge pipes 18, 18... Is formed in a substantially L shape with the lower end portion extending downward, and the dust discharge ports 19, 19.

  In addition, one dust reservoir pipe 20 is provided below the lowermost air cleaner units 13, 13..., And the dust reservoir pipe 20 is disposed in the horizontal direction. Further, the lower end of the plurality of dust discharge pipes 18, 18... Is connected to the upper surface portion of the dust storage pipe 20. Therefore, the dust D centrifuged by the air cleaner units 13, 13... Passes through the dust discharge pipes 18, 18... And is commonly collected in one dust storage pipe 20.

  Next, the operation of this embodiment will be described. First, when the cooling fan 7 is rotationally driven by the engine 5, the air a outside the engine room 4 is introduced into the engine room 4 to generate the cooling air C, and the engine cooling is circulated in the cooling device 8 by the cooling air C. Water, hydraulic oil, etc. are cooled.

  In this case, the dust D contained in the air a is separated and removed by the air cleaner units 13, 13... Before the air a goes to the cooling device 8. That is, as shown in FIG. 5, air a flows into the dust separation chamber R in the air cleaner unit 13 from the air suction pipe 14 and turns around the air discharge pipe 16 in a tornado shape. Move to the front end side (left side in FIG. 5). At this time, in the process of swirling the air a, the dust D contained in the air a is separated and removed by centrifugal force and falls to the bottom surface of the dust separation chamber R.

The dropped dust D passes through a dust discharge pipe 18 attached to the lower part of the front end surface of the air cleaner unit 13 and is collected in a single dust storage pipe 20. On the other hand, the clean air a1 from which the dust D has been separated and removed is discharged toward the cooling device 8 from the rear end side discharge port of the air discharge pipe 16. Thereby, the clean air a1 which does not contain the dust D passes through the cooling device 8.
As described above, according to the present invention, the centrifugal air cleaner device 12 is installed in front of the cooling device 8 including the oil cooler 9, the radiator 10 and the intercooler 11 which are heat exchangers. The dust inside is efficiently separated and removed.

  Therefore, unlike the conventional example, there is no possibility of dust entering the cooling device 8, so that the cooling device 8 can be prevented from being clogged. Thus, the cleanability of the cooling device 8 is improved, there is no fear of overheating of the cooling device 8, and the operation stoppage of machines such as the engine 5 and the hydraulic pump 6 due to overheating is prevented.

  Further, since the plurality of cylindrical air cleaner units 13, 13... Are arranged in a plurality of rows in the vertical and horizontal directions, the entire air cleaner device 12 is reduced in size and the occupied space is reduced. Accordingly, since the installation space for the air cleaner device 12 is small, the air cleaner device 12 can be installed in front of the cooling device 8 even when the installation area in front of the cooling device 8 is small.

  Further, the air suction pipes 14, 14,... Of the cylindrical air cleaner units 13, 13,... Are disposed in the gaps P, P, which are formed between the outer peripheral surfaces of the adjacent air cleaner units 13, 13..

  Therefore, since the air suction pipes 14, 14... Are installed by effectively using the gaps P, P... As dead spaces, a dedicated space for installing the air suction pipes 14, 14. This is unnecessary, and the entire air cleaner device 12 is further reduced in size accordingly. As a result, the installation space for the air cleaner device 12 can be further reduced.

  According to this embodiment, the dust discharge pipes 18, 18... Of the air cleaner units 13, 13,... Are connected to the dust reservoir pipes 20 provided in common to the plurality of air cleaner units 13, 13..

  Therefore, the dust separated from the individual air cleaner units 13, 13... Is collected in one dust storage pipe 20 through the dust discharge pipes 18, 18. Therefore, the cleanability of the air cleaner device 12 is remarkably improved.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The top view of the upper turning body of a hydraulic excavator which shows one Example of this invention. The top view explaining the cooling device concerning one example. The A arrow directional view of FIG. 2 which shows the air cleaner apparatus which concerns on one Example. The perspective view which shows the air cleaner single item which concerns on one Example. Sectional drawing explaining the flow of the air which passes through the inside of the air cleaner single goods which concern on one Example in model.

Explanation of symbols

5 Engine 6 Hydraulic pump 7 Cooling fan 8 Cooling device 9 Oil cooler 10 Radiator 11 Intercooler 12 Air cleaner device 13 Air cleaner unit (air cleaner only)
14 Air suction pipe 16 Air discharge pipe 18 Dust discharge pipe 20 Dust reservoir pipe (dust reservoir)

Claims (4)

  In a cooling device for a construction machine comprising a heat exchanger such as an oil cooler, a radiator and / or an intercooler installed in front of a cooling fan in an engine room, a centrifugal air cleaner device in front of the cooling device Is provided, and the air cleaner device is configured to separate and remove dust in the air.   2. The cooling device for a construction machine according to claim 1, wherein the air cleaner device comprises a plurality of cylindrical air cleaners, and the plurality of air cleaners are arranged in a plurality of rows in the vertical and horizontal directions.   The single cylindrical air cleaner has an air suction pipe attached to an outer peripheral surface thereof, and the air suction pipe is disposed so as to be positioned in a gap between adjacent air cleaners. Cooling equipment for construction machinery.   4. The construction machine according to claim 3, wherein a dust discharge pipe is attached to an end surface of each of the plurality of air cleaners, and each dust discharge pipe is connected to a dust reservoir provided in common to the plurality of air cleaners. Cooling system.

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