JP2740106B2 - Power source cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow generated by a fan, and a part of the air flow cools a power source such as an engine, and at the same time, covers another part of the air flow. The present invention relates to a power source cooling device that exchanges heat energy with a heat exchange device.

[0002]

2. Description of the Related Art With reference to FIGS. 8 and 9, the structure and operation of a conventional air cooling / cooling apparatus will be described with reference to an example in which an engine is used as a power source. A cooling fan 340 is mounted between the main heat exchanger 310 and the engine 330, and the engine output is transmitted to the drive shaft 355 via the crankshaft 351, the crank pulley 352 belt 353, and the fan pulley 354. Rotate 340. Therefore, between the engine 330 and the engine cover 300, the engine 330,
Crankshaft 351 Crank pulley 352 Belt 353 Fan pulley 354 Drive shaft 354 Cooling fan 340 and heat exchangers 310 and 320 are installed side by side on the same line. Here, different types of fluids, such as water, hydraulic oil,
When cooling a plurality of fluids such as an air conditioner-like fluid, the plurality of heat exchangers are installed in front of the cooling fan 340, so that the length of the plurality of heat exchangers is increased in the axial direction. It is affected by the rise and the increase in air resistance. FIG. 8 shows an example in which two heat exchangers are installed.

[0003]

The prior art described above has a disadvantage that the distance from the heat exchanger to the engine as the power source in the direction of the rotation axis for driving the fan for generating the air flow is long. An object of the present invention is to reduce the distance from the heat exchanger to the power source in the direction of the rotation axis that drives the fan that generates the air flow, and to reduce the distance between two heat exchangers before and after The purpose of the present invention is to make it possible to dispose the heat exchanger also in the circumferential direction.

[0004]

According to the present invention, a power source cooling device extends radially of a rotating shaft and rotates about the rotating shaft, forcing and discharging air substantially in the direction of the rotating shaft. And a rotary fan that urges and discharges air in a direction radially outward from the flow of air that is discharged substantially in the direction of the rotation axis, and air that is urged and discharged from the rotary fan in the direction of the rotation axis. Of heat energy between the power source, which is cooled by the flow of air, and the flow of air which is energized and discharged from the rotary fan in a direction radially outward from the flow of air which is discharged substantially in the direction of the rotation axis. A heat exchange device to be exchanged.

[0005]

According to the power source cooling device of the present invention, the rotary fan not only urges and discharges air substantially in the direction of the rotation axis but also radially outwards from the flow of air which is discharged substantially in the direction of the rotation axis. The air is also actively urged and exhausted in the direction to go. At the same time as forcibly discharging air in the direction of the rotation axis, which was not realized in the prior art,
By aggressive air discharge in a direction radially outward from the flow of air expelled substantially in the direction of the axis of rotation by the rotary fan, i.e., the simultaneous release of air from the rotary fan in two directions The forced discharge eliminates the necessity of disposing the power source, the heat exchange device, and the rotary fan on a straight line in the axial direction of the rotary fan, thereby increasing the degree of freedom in the arrangement of the heat exchange device. By disposing the device off the straight line in the axial direction of the rotary fan, the distance from the heat exchanger to the power source in the direction of the rotary axis for driving the fan that generates the air flow is reduced.

Further, by deflecting, using a guide duct or the like, the air that has been urged and discharged from the rotary fan and that flows in the direction of the rotation axis, the flow of the air that is discharged in the direction of the rotation axis can be reduced. Instead of generating air flowing more radially outward, the rotary fan directly generates air flowing more radially outward than the flow of air discharged in the direction of the axis of rotation. Without using a guide duct or the like, or by making the guide duct etc. a very small shape, in a direction radially outward from the flow of air discharged in the direction of the rotation axis almost toward the heat exchange device. A flowing air is formed.
This is also effective in shortening the distance in the axial direction of the rotating shaft that drives the fan from the heat exchanger to the power source.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first embodiment shown in FIGS. 1 to 4, a cooling fan (b) 2 constituting
As in the conventional example, the belt 8 is connected to the output shaft 81 of the engine 8.
2 and is mounted on a drive shaft 83 which is drivingly connected through the drive shaft 83.
In front of the cooling fan (b) 2, a cooling fan (b)
A rotary blade 11 that forms a part of a cooling fan (a) 1 that forms a centrifugal flow fan is mounted on a drive shaft 83 via a connecting rod 14 in a state coaxial with the rotary fan 2. The rotor 11 has an opening 15 so that the air sucked by the cooling fan (b) 2
(a) It may be supplied inside one radial direction.
Furthermore, on the outer peripheral surface of the rotor 11, the rotor 11 attached to the intake duct inner diameter portion 41 on the rear side via the intake duct outer diameter 42 on the front side of the cylindrical heat exchanger 3 described later. The fixed wing 12 is attached with an appropriate clearance between the fixed wing 12 and the fixed wing 12. In front of the cooling fan (a) 1 and the cooling fan (b) 2, an engine cover 5 provided with a cover opening 7 and a louver 6 which are partially open is arranged. Inhale.

Next, the outer periphery of the cooling fan (a) 1
6 is adjusted to be concentric with the drive shaft 83 for driving the cooling fan (a) 1 and the cooling fan (b) 2 and attached to the engine cover 5, Further, between the heat exchanger 3 and the cooling fan (a) 1, a thin-walled intake duct 4 constituting a duct through which air can flow between the inner diameter of the heat exchanger 3 and the cooling fan (a) 1 is provided. It is attached to the inner diameter of the heat exchanger 3. As illustrated, the width of the heat exchanger 3 may overlap with the width of the cooling fan (a) 1 in the axial direction of the drive shaft 83. Then, the radial airflow from the cooling fan (a) 1 reaches the heat exchanger 3 efficiently.
An appropriate clearance 16 is provided between the inner diameter portion 41 of the intake duct and the outer diameter side surface of the cooling fan (a) 1 so as not to interfere with each other.

The flow of the cooling air with the above configuration will be described.
Due to the rotation of the rotating blades 11 of the cooling fan (a) 1 and the guide action of the wind flow of the fixed blades 12, fresh outside air sucked from the cover intake port 7 of the engine cover 5 is viewed from the arrow in FIG. As shown by the flow (a), the cooling fan (a) 1
Is radially urged and discharged by the cooling fan (a) 1 in the radial direction through the cooling fan intake port 13 of the cooling fan (a) 1 formed outside the heat exchanger 3, and heat is discharged through the inner diameter of the heat exchanger 3. It passes through the inside of the exchanger, is ventilated to the outer diameter part, and is discharged to the outside through the cover discharge port 51. When the cooling air passes through the inside of the heat exchanger 3, the fin 32 and the tube 33 shown in FIG. 6 are cooled, and heat exchange is performed with the fluid.

The outside air sucked from the louver 6 of the engine cover 5 by the rotation of the cooling fan (b) 2 is supplied to the cooling fan (b) as shown by the arrow (b) in FIG. 2) It is discharged to the rear, cooled while passing around the engine 8, and discharged to the outside through an exhaust port (not shown) at the rear of the engine.

Next, the configuration and operation of the heat exchanger according to the present invention will be described. As shown in FIG. 5, the external shape is a disk-shaped side plate 31 attached to the middle part at right angles on both end surfaces thereof with thin fins 32 made of a metal having good heat conductivity such as copper and aluminum being straddled. , Cylindrical type. Numerous holes are formed in the fin 32, and a number of annular tubes 33 having a cavity therein are mounted through the holes. In this case, as the material of the tube 33, a metal having good heat conductivity is used similarly to the fin 32. In this manner, a part of the cylindrical heat exchanger 3 is notched and opened, and a tank 34 having a cavity inside at both end surfaces of the notch is attached and connected to the tube 33 by welding or the like, Further, the hollow portion inside the tube 33 and the tank 3
4 Connect the cavity inside. Next, one end of the tank 34 is used as a fluid inlet 35, and the other end is used as a fluid outlet 36. The fluid flows in from the inlet and is discharged from the outlet. Heat is exchanged with the cooling air to be generated, and the fluid temperature in the heat exchanger 3 can be reduced.

In the above description, the case where the fluid that normally requires heat exchange is one type for one engine, for example, the case where a radiator for exchanging heat of engine cooling water is used, but as a second embodiment, an engine is used. An example of a heat exchanger that requires heat exchange of several kinds of fluids such as an oil cooler for cooling a hydraulic oil of a hydraulic device operated by using an engine as a power source and a cooler for an air conditioner, in addition to the cooling water, will be described. As an example, 2
FIG. 7 shows an example in which a heat exchanger for various kinds of fluids is mounted. In this case, the heat exchanger 3 when one unit is mounted is divided into two, and a semi-cylindrical heat exchanger, that is, the heat exchanger 200 for the fluid (a) and the fluid
(b) The heat exchanger 400 is configured. Tanks 201, 401, 2 having internal cavities at both ends of a semi-cylindrical heat exchanger
02, 402, and fluid inlet ports 203, 403 and fluid outlet ports 204, 404, which are piping connections, are installed in the respective tanks. Further, as shown in FIG. A fluid outlet pipe 92 and a fluid (refrigerant) supply pipe fluid (refrigerant) discharge pipe (not shown) are connected to perform suction and discharge of the fluid.
In the case of two divisions, the plane area facing the flow of the cooling air is reduced, but the thickness of the cylindrical portion, that is, the number of mounting steps of the fins 32 and the tubes 33 is increased as compared with the case of no division, and the heat radiation area is made equal and the heat exchange area is equal. To maintain. As described above, in the inner diameter portion of the semi-cylindrical heat exchanger configured in two parts,
As in the case of a single heat exchanger, the intake duct 4
The cooling air discharged from the cooling fan (a) 1 is blown to the inner diameter of the heat exchanger and exchanges heat with the fluid while passing through the heat exchanger 3. Is discharged to

As shown in FIG. 10, a cooling fan (a)
The width (inner diameter) of the rotating blade 11 and the width (outer diameter) of the cooling fan (b) 2 overlap each other in their radial directions, that is, the rotating blade 11 of the cooling fan (a) 1 FIG.
Cooling fan extending radially inward as shown in FIGS.
(b) 2 front side (upstream of the cooling fan (b) 2 in the axial airflow direction by the cooling fan (b) 2) as shown in the figure, or rear side (not shown)
(b) a cooling fan in the axial airflow direction by 2
(b) downstream of the cooling fan (b) 2, and the air sucked in the direction of their rotation axis by the cooling fan (b) 2 is supplied to the inside of the rotating blade 11 of the cooling fan (a) 1 in the radial direction, The energized discharge of air outward in the radial direction by the rotor 11 may be promoted.

[0014]

According to the present invention, when the heat exchanger is mounted on a portion other than the front or rear surface of the cooling fan, for example, on the radially outer side of the cooling fan, the heat is increased as compared with the conventional arrangement of the engine, the cooling fan and the heat exchanger in series. The arrangement of exchangers is no longer on the same axis,
The arrangement size in the axial direction is small and compact, so that the entire engine cooling unit can be compact. When multiple heat exchangers are installed, the front surface of the heat exchanger is arranged on the same plane and under the same conditions for the flow of cooling air by configuring a cylindrical heat exchanger, compared to the conventional multi-layer system. For each heat exchanger, uniform temperature distribution, passage of air volume, and partial temperature rise of cooling air due to multi-stage stacking are improved, and cooling performance is improved. Since the cooling air to the heat exchanger and the cooling air to the engine body are formed by blowing air in mutually opposite directions, the required cooling air volume is always ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an entire air-cooled cooling device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the entire air-cooled cooling air according to a second embodiment, with a cut surface different from that of FIG. 1;

FIG. 3 is a longitudinal sectional view showing an external configuration of a cylindrical heat exchanger constituting the air-cooled cooling device according to the present invention.

FIG. 4 is a longitudinal sectional view showing the internal configuration of the heat exchanger.

FIG. 5 is a perspective view showing the overall structure of the heat exchanger.

FIG. 6 is a longitudinal sectional view showing the internal structure of the heat exchanger.

FIG. 7 is a longitudinal sectional view showing another embodiment of the cylindrical heat exchanger according to the second embodiment.

FIG. 8 is a longitudinal sectional view showing a conventional air-cooled cooling device.

FIG. 9 is a sectional view taken along the line EE in FIG. 8;

FIG. 10 is a cross-sectional view showing another embodiment of the shape of the cooling fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling fan (a) 11 Rotor blade 12 Fixed blade 13 Cooling fan intake port 14 Connecting rod 2 Cooling fan (b) 3 Heat exchanger 31 Side plate 32 Fin 33 Tube 34 Tank 35 Fluid inlet port 36 Fluid outlet port 4 Intake duct

Claims (4)

(57) [Claims] A rotating shaft extending in a radial direction of the rotating shaft;
To rotate and exhaust air in the direction of the rotation axis,
And at the same time, the flow of air discharged substantially in the direction of the axis of rotation.
Urges air in a direction radially outward
The rotating fan and the exhaust from the rotating fan substantially in the direction of the axis of rotation
Power source cooled by the air flow and radially more than the air flow exhausted in the direction of the axis of rotation
It is urged and discharged by the rotary fan in the direction toward the outside
Heat energy is exchanged with the airflow
Air is drawn almost in the direction of the rotation axis toward the heat exchanger and the rotary fan.
A power source cooling device comprising: 2. A rotary shaft extending in a radial direction of a rotating shaft and rotating the rotating shaft.
To rotate and exhaust air in the direction of the rotation axis,
And at the same time, the flow of air discharged substantially in the direction of the axis of rotation.
Urges air in a direction radially outward
The rotating fan and the exhaust from the rotating fan substantially in the direction of the axis of rotation
Power source cooled by the air flow and radially more than the air flow exhausted in the direction of the axis of rotation
It is urged and discharged by the rotary fan in the direction toward the outside
Heat energy is exchanged with the airflow
A power source cooling device having a heat exchange device, wherein the rotary fan mainly emits air substantially in the direction of the rotation axis.
Rotary axial fan that discharges and discharges mainly rotary shaft
Radially outward from the air flow discharged in the line direction
A rotary centrifugal flow fan that urges and discharges air in the contracting direction,
And two types of fans, with an opening between the rotary axial fan and the rotary centrifugal fan.
The air drawn by the rotary axial fan is
Power source cooling supplied radially inside the centrifugal fan
apparatus. 3. The rotating shaft extends in the radial direction of the rotating shaft.
Rotating at Ri, urged discharging air in a direction substantially times Utatejikusen,
And at the same time, the flow of air discharged substantially in the direction of the axis of rotation.
Urges air in a direction radially outward
The rotating fan and the exhaust from the rotating fan substantially in the direction of the axis of rotation
Power source cooled by the air flow and radially more than the air flow exhausted in the direction of the axis of rotation
It is urged and discharged by the rotary fan in the direction toward the outside
Heat energy is exchanged with the airflow
A power source cooling device having a heat exchange device, wherein the rotary fan mainly emits air substantially in the direction of the rotation axis.
Rotary axial fan that discharges and discharges mainly rotary shaft
Radially outward from the air flow discharged in the line direction
A rotary centrifugal flow fan that urges and discharges air in the contracting direction,
And the outer diameter of the rotary axial fan is smaller than the inner diameter of the rotary centrifugal fan.
Large, and the air sucked by the axial fan is rotated
Power source cooling supplied radially inside the centrifugal fan
apparatus. 4. The rotating shaft extends in a radial direction of the rotating shaft and rotates around the rotating shaft.
To rotate and exhaust air in the direction of the rotation axis,
And at the same time, the flow of air discharged substantially in the direction of the axis of rotation.
Urges air in a direction radially outward
The rotating fan and the exhaust from the rotating fan substantially in the direction of the axis of rotation
Power source cooled by the air flow and radially more than the air flow exhausted in the direction of the axis of rotation
It is urged and discharged by the rotary fan in the direction toward the outside
Heat energy is exchanged with the airflow
A power source cooling device having a heat exchange device, wherein the rotary fan mainly emits air substantially in the direction of the rotation axis.
Rotary axial fan that discharges and discharges mainly rotary shaft
Radially outward from the air flow discharged in the line direction
A rotary centrifugal flow fan that urges and discharges air in the contracting direction,
With two types of fans, which are more radial than the flow of air discharged in the direction of the rotation axis.
From the rotating centrifugal fan in the outward direction.
There is also a duct to guide the trapped air to the heat exchange device.
Power source cooling device.