JP3117649U - Double tube water-cooled oil cooler - Google Patents

Abstract

Provided is a double-pipe water-cooled oil cooler capable of obtaining a flow path capable of obtaining sufficient cooling performance without increasing the length of a cooler body more than necessary.
SOLUTION: By increasing the contact area between the inner pipe of the cooler and the oil, the oil introduced from the inlet flows out from the outlet while rotating around the inner pipe, thereby extending the flow path and improving the cooling performance. .
[Selection] Figure 1

Description

  The present invention relates to an oil cooler that cools engine oil with engine cooling water, and more particularly to a double-tube water-cooled oil cooler in which an oil passage is provided between an outer tube and an inner tube.

  An oil system tune is indispensable to protect the engine condition and always keep it in the best condition. Oil cooler equipment is indispensable in order to stabilize the oil temperature during sport running that continuously uses high rotation and suppress power down.

  If the oil runs continuously at high speed and high load, its temperature may rise too much. The temperature difference between the cooling water temperature and the oil temperature is said to be an appropriate oil temperature of water temperature + 10 ° C. In normal driving, the cooling water temperature is 84 ° C and the oil temperature is about 95 ° C. The oil temperature rises to about 110 ° C, and if the circuit runs, the water temperature rises to 96 ° C and the oil temperature rises to about 127 ° C. The water temperature does not rise unexpectedly, but the oil temperature rises. Overheated oil may be deteriorated due to its extremely poor lubrication effect, so it is forcibly cooled with an oil cooler.

  An increase in oil temperature is fatal to the engine during winding and circuit driving. An increase in oil temperature not only reduces output but also adversely affects the inside of the engine. In order to obtain an ideal cooling effect, it is generally said that the water-cooled type using engine cooling water can cool the engine oil more efficiently than the air-cooled oil cooler. That is, the water-cooled oil cooler is for stabilizing the oil temperature of the engine by exchanging heat between the cooling water and the oil.

  Various water-cooled oil coolers are commercially available, but the same double-tube oil cooler as that of the present invention is disclosed in Japanese Utility Model Laid-Open No. 1-1141314. That is, a cooler body consisting of an outer pipe and an inner pipe inserted into the outer pipe. Oil inlet pipes and outlet pipes are attached to both ends of the outer pipe, and oil introduced from the inlet pipe is connected to the inner pipe. It is a structure that flows between the outer pipes and flows out from the outlet pipe, and heat exchange is performed between the cooling water and the oil while the oil flows through the flow path between the inner pipe and the outer pipe. This is the mechanism by which oil is cooled.

  In such an oil cooler, it is necessary to lengthen the oil flow path in order to improve its cooling performance, but there is a limit to lengthening the overall length even in relation to the vehicle width. Even if extended as much as possible, the cooling performance could not be sufficiently improved because of the structure in which the oil flows in one direction.

  The problem to be solved is to obtain a flow path capable of obtaining sufficient cooling performance without increasing the length of the cooler body more than necessary.

  The present invention increases the contact area between the cooler inner pipe and the oil, and the oil introduced from the inlet flows out from the outlet while rotating around the inner pipe, thereby extending the flow path and improving the cooling performance. This is a means for solving the problem.

  Conventional water-cooled oil coolers require a longer oil flow path to improve cooling performance, but there is a limit to lengthening the overall length even in terms of vehicle width. However, because the oil flows in one direction, the cooling performance could not be improved sufficiently. However, in the present invention, the inner pipe 3 is made up of four pipes provided at appropriate intervals. The oil goes to the outlet while rotating the four inner pipes 3 through the partition walls 4, and the length of the flow path is about 2.4 times. Moreover, since the flow direction of the cooling water and the flow direction of the oil intersect, the cooling performance can be remarkably improved. Moreover, since the material of the cooler body 1 is made of copper or brass having high self-heat dissipation, the heat dissipation effect is further enhanced. Furthermore, the cooling water is sucked into the cooling water pump attached to the engine body by the hose from the cooling water outlet side, but the water temperature is adjusted by controlling the flow rate of the cooling water by the thermostat between the pump and the hose. The oil temperature is also kept at an appropriate temperature by heat exchange with the cooling water. Therefore, when the oil is cold, the practical effect is extremely remarkable, such as being able to warm the oil with cooling water, reducing the resistance of the oil and contributing to fuel consumption.

  The present invention is configured so that oil introduced from an oil inlet flows out from the outlet while rotating around the inner pipe between the outer pipe of the cooler body and the inner pipe serving as a cooling water flow path. This is a double-pipe water-cooled oil cooler. Furthermore, the inner pipe that is the flow path of the cooling water consists of four pipes, and the oil introduced from the oil inlet is in contact with the circumference of each of the four pipes. 2. The double-pipe water-cooled oil cooler according to claim 1, which is configured to rotate around the four inner pipes and to flow out from the outlet. Further, the cooler body including the outer pipe and the inner pipe is made of copper. The double-pipe water-cooled oil cooler according to claim 1 or 2 is made of brass.

  FIG. 1 is a cross-sectional view showing the entire oil cooler body 1, 2 is an outer tube, 3 is an inner tube, 4 is a partition wall, 5 is an oil inlet, 6 is an oil outlet, 7 is a cooling water inlet, and 8 is a cooling water outlet. , 9 indicate flow paths. For the sake of clarity, the parts other than the inner tube 3 including the partition wall 4 are indicated by broken lines. The arrows indicate the flow of oil and cooling water, and indicate that the flow of oil and the flow of cooling water intersect.

  As shown in FIG. 1, an oil inlet 5 and an oil outlet 6 are connected to the outer pipe 2, and a cooling water inlet 7 and a cooling water outlet 8 are provided on both sides. In this embodiment, these members are made of copper or brass.

  As shown in FIG. 1 and FIG. 2, the inner tube 3 is composed of four tubes, and the four tubes are fixed with a partition wall 4 at an appropriate interval. The partition 4 has a shape in which a part of the partition wall is alternately omitted so that the oil can move to the next corner while rotating around the inner tube 3. In the figure of the present embodiment, the partition wall 4 is provided at a right angle to the longitudinal direction of the inner tube 3, but it may be slightly spiraled to facilitate the oil flow. The inner tube 3 and the partition wall 4 are also made of copper or brass, like the outer tube 2. The total flow rate of the four inner pipes 3 and the flow rate of the cooling water hose communicating with the cooling water inlet 7 and the cooling water outlet 8 are the same.

  Although not shown, the oil cooler 1 is attached to the engine via an oil block.

  The present invention is configured so that oil introduced from an oil inlet flows out from the outlet while rotating around the inner pipe between the outer pipe of the cooler body and the inner pipe serving as a cooling water flow path. This is a double-pipe water-cooled oil cooler. Furthermore, the inner pipe that is the flow path of the cooling water consists of four pipes, and the oil introduced from the oil inlet is in contact with the circumference of each of the four pipes. 2. The double-pipe water-cooled oil cooler according to claim 1, which is configured to rotate around the four inner pipes and to flow out from the outlet. Further, the cooler body including the outer pipe and the inner pipe is made of copper. Since the double-pipe water-cooled oil cooler according to claim 1 or 2 is made of brass, the conventional water-cooled oil cooler needs a long oil flow path to improve the cooling performance. There is, but to increase the total length even in relation to the vehicle width Even if it is extended as much as possible, the cooling performance could not be sufficiently improved due to the structure in which the oil flows in one direction. However, in the present invention, the inner pipe 3 is spaced at an appropriate interval. The oil is directed to the outlet while the four inner pipes 3 are rotated through the partition wall 4 and the flow path length is about 2.4 times. Moreover, since the flow direction of the cooling water and the flow direction of the oil intersect, the cooling performance can be remarkably improved. Moreover, since the material of the cooler body 1 is made of copper or brass having a high self-heat dissipation property, the heat dissipation effect is further enhanced. Furthermore, the cooling water is sucked into the cooling water pump attached to the engine body by the hose from the cooling water outlet side, but the water temperature is adjusted by controlling the flow rate of the cooling water by the thermostat between the pump and the hose. The oil temperature is also kept at an appropriate temperature by heat exchange with the cooling water. Therefore, when the oil is cold, the oil can be warmed with cooling water, the resistance of the oil is reduced, and it can contribute to fuel consumption. is there.

  The side view which carried out the partial cross section of the oil cooler.   The front view which carried out the partial cross section of the oil cooler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil cooler 2 Outer pipe 3 Inner pipe 4 Bulkhead 5 Oil inlet 6 Oil outlet 7 Cooling water inlet 8 Cooling water outlet 9 Flow path

Claims (3)

  A double pipe type water cooling system in which oil introduced from the oil inlet is configured to flow out from the outlet while rotating around the inner pipe between the outer pipe of the cooler body and the inner pipe serving as the cooling water flow path. oil cooler.   The inner pipe serving as the cooling water flow path is composed of four pipes, and the oil introduced from the oil inlet rotates around the four inner pipes while contacting the circumference of each of the four pipes. The double-pipe water-cooled oil cooler according to claim 1, wherein the double-tube type water-cooled oil cooler is configured to flow more out.   3. The double-pipe water-cooled oil cooler according to claim 1 or 2, wherein the cooler body including the outer tube and the inner tube is made of copper or brass.

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