JPH0330588Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a radiator cooling structure for a working vehicle, in which an air intake duct equipped with a dust-proof intake port is provided at the front of the radiator.

[Conventional technology]

As for the structure around the radiator of a work vehicle such as a combine harvester, for example, as disclosed in Japanese Utility Model Application Publication No. 56-54224, there is an air intake having a dust-proof intake port with a dust-proof mesh stretched across the front surface of the radiator. Generally, a duct is provided and the cooling air is introduced from the entire surface of the dust-proof intake port of the intake duct, but the following problems sometimes occur.

[Problems to be solved by the invention] The cross-sectional area of the intake duct through which cooling air passes is approximately the same as the front surface area of the radiator, and the dust-proof intake port of the intake duct is located at a position facing the front of the radiator. As shown in FIG. 5, the inflow speed of the cooling air passing through the radiator 8 is constant and slow at any part of the radiator 8, so the fine dust that has passed through the dustproof screen of the intake duct 10 passes through the radiator 8. Since the particles do not escape to the rear and are uniformly deposited on the entire surface of the radiator 8, the cooling efficiency of the radiator 8 decreases, and there is a possibility that the engine may overheat.

Here, the purpose of the present invention is to prevent fine dust from accumulating on the radiator 8 and reduce the cooling efficiency of the radiator 8, as described above.
This secures the suction area of the outside air suction part and prevents a decrease in suction efficiency due to clogging of the outside air suction part with large pieces of straw.

[Means for solving problems]

The feature of the present invention is that in the above-mentioned radiator cooling structure for a work vehicle, the portion of the intake duct that faces the front surface of the radiator is a wall surface, and around this wall surface, there are radiator cooling structures in the radiator intake direction. The dust-proof intake port is provided for sucking in outside air from orthogonal directions, and its functions and effects are as follows.

[Effect]

With the structure described above, cooling air is not linearly supplied to the radiator 8 from outside the intake duct 10 through the intake duct 10 as in the conventional structure shown in FIG. 5, but as shown in FIG. As shown, the cooling air flows in from the outer circumferential direction of the radiator 8 and is supplied to the radiator 8 through the dust-proof intake port 12, so the inflow speed of the cooling air is high near the outer circumference of the radiator 8 near the dust-proof intake port 12, and the dust-proof Intake port 1
The farther the central part of the radiator 8 is from 2, the slower the inflow speed becomes. As a result, fine dust that has passed through the dust-proof intake port 12 on the outer periphery of the radiator 8 adheres to and accumulates on the radiator 8 in the center of the radiator 8, but near the outer periphery of the radiator 8 where the speed of cooling air passing through the radiator 8 is high, the dust Since the dust gets on the fast cooling air and passes through the radiator 8 before it adheres to the dust, unlike the conventional structure, dust adheres and accumulates on the entire surface of the radiator 8. Furthermore, the dust-proof inlet is located opposite the radiator 8. Since they are provided at vertical and horizontal positions around the wall surface 11, outside air is sucked in over a wide range, and it is possible to prevent early clogging of the dust-proof inlet due to large dust.

[Effect of idea]

As explained above, cooling air is introduced not from the front of the radiator, but from the outer circumferential direction of the radiator, as well as from wide areas on the top, bottom, left and right, and by creating parts of the radiator surface where the flow velocity is high. It is possible to prevent the cooling efficiency of the radiator from decreasing due to early adhesion and accumulation of dust, and also prevent early clogging of dust at the outside air intake part.
It is now possible to prevent a decline in total cooling efficiency.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an agricultural combine harvester which is one of the embodiments of the present invention will be described based on the drawings.

As shown in Fig. 3, a pre-harvesting processing unit 1, which lifts and reaps the planted grain culm, and transports the reaped grain culm in a horizontal position and transfers it to a feed chain (not shown); A threshing device 2 that threshes harvested grain culms transported by a chain using a handling cylinder (not shown) that is horizontally suspended so that it can be driven inside, and an engine that drives the devices and generates power for self-propulsion. 3
A combine harvester is constructed by mounting the control section 4 and the control section 4 on a body equipped with a crawler traveling device 5.

Next, to explain in detail the engine 3 to which the present invention is applied, as shown in Figures 1 and 2, the engine 3 is located on the front right side of the aircraft, and is located near the cockpit.
It is housed in a lower engine grill 7, and a radiator 8 and a fan 9 driven by the engine 3 are installed on the right side of the engine 3. A short rectangular cylindrical intake duct 10 is provided in front of the radiator 8.
The front surface of this intake duct 10 is a wall surface 11, and dust-proof intake ports 12 with dust-proof nets are provided on the top, bottom, left and right sides of this wall surface 11 and on each side of the engine grill 7 behind the cockpit 6. Due to the absorption action of the fan 9, cooling air passes through the dust-proof intake port 12, flows into the intake duct 10 from the outer peripheral direction, and is supplied to the radiator 8. Note that the perforated steel plate 13 provided between the air intake duct 10 and each dust-proof intake port 12 adjusts the size of the hole to adjust the amount of inflow air so that cooling air uniformly flows in from each dust-proof intake port 12. It has the role of adjustment.

[Brief explanation of drawings]

The drawings show an embodiment of the radiator cooling structure for a working vehicle according to the present invention, in which FIG. 1 is a perspective view of the vicinity of the engine grill 7, FIG. 2 is a longitudinal cross-sectional front view of the vicinity of the engine grill 7, and FIG. Overall side view,
FIG. 4 is a diagram showing the cooling air velocity distribution near the radiator according to the present invention, and FIG. 5 is a diagram showing the cooling air velocity distribution near the radiator in the conventional structure. 8...Radiator, 10...Intake duct, 11
...Wall surface, 12...Dust-proof air intake.

Claims (1)

[Scope of utility model registration request] A radiator cooling structure for a work vehicle in which an intake duct 10 having a dust-proof intake port 12 is disposed in the front part of a radiator 8, wherein a portion of the intake duct 10 facing the front surface of the radiator 8 is a wall surface,
A radiator cooling structure for a work vehicle, in which dust-proof intake ports 12 are provided around this wall surface 11 at vertical and horizontal positions for sucking outside air from a direction substantially perpendicular to the radiator intake direction.