JPH0640687U - Oil cooler - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an oil cooler with a built-in radiator, in which the stagnation of the oil in the oil passage is eliminated to improve the heat exchange efficiency. An oil cooler main body 25 including an inner pipe 27 and an outer pipe 29 is extended outward from at least one of an inlet pipe and an outlet pipe, and an oil cooler is provided between the inner pipe 27 and the outer pipe 29. Cooler body 25
Oil is opened on the side of the extension end 25a of the
A substantially U-shaped oil partition portion 43 leading to the a side is provided so as to surround the oil inlet / outlet ports 45, 47 of the extension side inlet pipe or outlet pipe, and the oil partition portion 43 inside the oil inlet / outlet ports 45, 47. A gap 49 for the passage of oil is provided in the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil cooler with a built-in radiator that is mounted in a radiator tank.

[0002]

[Prior art]

 Disclosed in Japanese Utility Model Publication No. 1-111959 is an oil cooler with a radiator that can change the design heat radiation amount by changing the length of the oil cooler body without changing the distance between the inlet pipe and the outlet pipe. Has been done.

In this oil cooler, as shown in FIGS. 7 and 8, an oil cooler main body 5 including an inner pipe 1 and an outer pipe 3 is extended outward from a position of an outlet pipe 7 to form an outlet pipe 7. An oil shielding plate 11 that blocks the oil flow passage 9 on the outlet pipe 7 side is arranged in the oil flow passage 9 inside the position, and the oil that flows into the extension portion 5a of the oil cooler body 5 flows into the extension portion 5a. An oil guide plate 13 for guiding O toward the end of the extension is formed integrally with the oil shield plate 11 as shown in FIG. 9, or alternatively, as shown in FIG. 10, the oil cooler body 15 is provided with an inlet pipe. The oil passage on the inlet pipe 17 side is extended to the outside from the position of 17 and the oil passage 19 on the inside of the position of the inlet pipe 17 of the oil cooler body 15 is provided. The oil shield plate 11 is arranged so as to block 9 and the oil guide plate 13 for guiding the oil O to the end of the extension part is further arranged at the extension part 15a of the oil cooler body 15.

In the figure, 21 is an inner fin mounted in the oil passages 9 and 19, and 23 is a cooling water passage.

[0005]

[Problems to be solved by the device]

 However, in the oil shield plate 11 shown in FIG. 9, the inner diameter 11a and the outer diameter 11b are substantially the same as the outer diameter of the inner pipe 1 and the inner diameter of the outer pipe 3, respectively, and the outer periphery of the oil shield plate 11 is the same. Since the structure is brazed to the inner surface of the outlet pipe 7 or the inlet pipe 17, the flow of the oil O on the back surface side of the oil shield plate 11 is completely blocked.

Therefore, it has been pointed out that the stagnation of the oil O may occur on the back surface side of the oil shield plate 11 and the heat exchange efficiency between the oil O and the cooling water may be deteriorated. The present invention has been devised in view of such circumstances, and like the above oil cooler, the design heat radiation amount is changed by changing the length of the oil cooler main body without changing the distance between the inlet pipe and the outlet pipe. An object of the present invention is to provide an oil cooler with a built-in radiator that can improve the heat exchange efficiency by eliminating the stagnation of the oil in the oil flow path.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention has an opening in an oil passage formed between an inner pipe and an outer pipe in an axial direction of a double pipe type oil cooler main body including an inner pipe and an outer pipe. In an oil cooler with a built-in radiator in which an inlet pipe and an outlet pipe are fixed, the oil cooler body is extended outward from at least one of the inlet pipe and outlet pipe, Between the pipe and the outer pipe, a substantially U-shaped oil partition that opens at the end of the extension of the oil cooler body and guides the oil to the end of the extension is connected to the oil inlet / outlet of the inlet or outlet pipe on the extension. And an oil passage gap is provided in the oil partition inside the oil inlet / outlet.

[0008]

[Action]

 According to the present invention, for example, if both ends of the oil cooler body are extended outward from the positions of the inlet pipe and the outlet pipe, respectively, and an oil partition is provided between the inner pipe and the outer pipe, the inlet pipe is Most of the oil that flows into the oil flow path from the oil inlet via the oil guide is guided to the end of the extension along the oil partition, changes direction at the end of the extension, and then flows toward the oil outlet. In addition, part of the oil that flows in from the oil inlet does not flow to the end of the extension along the oil partition, but bypasses the gap and flows between the inlet pipe and outlet pipe to the oil outlet side. It will be.

Then, a part of the oil flowing to the oil outlet side passes through the gap provided in the oil partition portion and immediately reaches the oil outlet, but most of the oil is guided to the oil partition portion and the oil on the other side is guided. After being guided to the end of the extension and changing the direction at the end of the extension, the oil is guided by the oil partition to reach the oil outlet.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of an oil cooler according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a main part of the oil cooler shown in FIG. 1, where 25 is an inner pipe 27 and an outer pipe 29. In the double-tube type oil cooler main body, an oil passage 33 in which an inner fin 31 is interposed is formed between the inner pipe 27 and the outer pipe 29 as in the conventional case.

In the axial direction of the oil cooler body 25, an inlet pipe 35 and an outlet pipe 37, which are open to the oil flow path 33 at the same intervals as the conventional one, are fixed via a connector 39. The oil O flowing from the inlet pipe 35 into the oil flow passage 33 is heat-exchanged with the cooling water flowing through the cooling water flow passage 41 in the inner pipe 27 and flows out from the outlet pipe 37.

In the oil cooler body 25 of this embodiment, the inner pipe 27 and the outer pipe 29 extend outward from the positions of the inlet pipe 35 and the outlet pipe 37 as shown in FIG. It has a long structure.

As shown in FIG. 3, the inner wall of the inner pipe 27 has a substantially U-shape that opens toward the extended end 25 a of the oil cooler body 25 and guides the oil O toward the extended end 25 a. Of the oil pipe 43 is formed by bulging so as to surround the oil inlet 45 and the oil outlet 47 provided in the outer pipe 29, and the top of the oil partition 43 is the inner circumference of the outer pipe 29. Is formed with a height that abuts against.

Further, as shown in FIG. 3 and FIG. 5, the oil partition portion 43 has a space 49 through which the oil O passes at a position located inside the positions of the oil inlet 45 and the oil outlet 47, respectively. A part of the oil O, which is provided from the oil inlet 45 via the inlet pipe 35, does not flow to the extension end 25a side along the oil partition 43 as shown in FIG. And then flows to the oil outlet 47 side through the inner fin 31 between the oil inlet 45 and the oil outlet 47, and immediately on the oil outlet 47 side, a part of the oil O passes through the gap 49 and immediately. It is designed to reach the oil exit 47.

As shown in FIG. 5, the inner fin 31 interposed in the oil flow path 33 has a height at which the portion provided with the oil partition portion 43 is cut so as to come into contact with the inner circumference of the outer pipe 29. The top portion of the oil partition portion 43 formed in the above is in direct contact with the inner circumference of the outer pipe 29.

Since the present embodiment is configured in this way, most of the oil O that has flowed into the oil flow path 33 from the oil inlet 45 via the inlet pipe 35 is, as shown in FIG. Is guided to the extension end 25a side, changes its direction at the extension end 25a, then flows toward the oil outlet 47 side, and as described above, the oil O flowing from the oil inlet 45 A part of the oil bypasses the gap 49 without flowing toward the extension end 25a side along the oil partition 43, and flows to the oil outlet 47 side through the inner fin 31 between the oil inlet 45 and the oil outlet 47. It will be.

Then, a part of the oil O flowing to the oil outlet 47 side passes through the gap 49 provided in the oil partition portion 43 and immediately reaches the oil outlet 47, but most of the oil O is in the oil partition portion. It is guided by 43 and guided to the opposite side extension end 25a side, and after changing its direction at the extension end 25a, it is guided by the oil partition 43 and reaches the oil outlet 47.

Therefore, according to this embodiment as well, as in the conventional example shown in FIG. 7, the length of the oil cooler main body 25 is changed without changing the interval between the inlet pipe 35 and the outlet pipe 37, and the designed cooling is performed. It is possible to change the amount of heat.

In addition to the above effects, the present embodiment provides a gap 49 in the oil partition portion 43 so that part of the oil O flowing from the oil inlet 45 extends along the oil partition portion 43 at the end 25a of the extension portion. Flow toward the oil outlet 47 side through the inner fin 31 between the oil inlet 45 and the oil outlet 47 without flowing to the side, and on the oil outlet 47 side, part of the oil O Since the oil passes through the gap 49 and immediately reaches the oil outlet 47, the oil O does not stagnate in the oil flow path 33 as compared with the conventional example shown in FIG. 7 and FIG. The efficiency of heat exchange with cooling water was improved. Further, there is an advantage that the oil passage resistance can be tuned by changing the width of the gap 49.

In the above embodiment, the oil partition portion 43 is integrally molded with the inner tube 27 by bulging the peripheral wall of the inner tube 27. However, for example, a separate member having a round cross section or a square cross section is used for the oil partition section as described above. You may provide a part.

Further, in the above-described embodiment, both end sides of the oil cooler body 25 are extended outward from the positions of the inlet pipe 35 and the outlet pipe 37, respectively, and between the inner pipe 27 and the outer pipe 29. Although a U-shaped oil partition 43 is provided, one of the ends of the oil cooler main body is extended outward from the position of the inlet pipe or the outlet pipe due to the layout, and the oil partition is provided only on the extension side. The portion 43 may be provided, and even with such a structure, the intended purpose can be achieved as in the above-described embodiment.

[0022]

[Effect of device]

 As described above, according to the present invention, it is possible to change the design heat radiation amount by changing the length of the oil cooler body without changing the distance between the inlet pipe and the outlet pipe. Compared with the above, there is an advantage that the stagnation of the oil in the oil passage is eliminated and the heat exchange efficiency with the cooling water is improved.

[Brief description of drawings]

FIG. 1 is a plan view of an oil cooler according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of the oil cooler shown in FIG.

FIG. 3 is a cross-sectional view of the essential parts of the oil cooler shown in FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is an exploded perspective view of the oil cooler shown in FIG.

FIG. 6 is an explanatory diagram showing a flow of oil.

FIG. 7 is a longitudinal sectional view of a main part of a conventional oil cooler.

FIG. 8 is a plan view of a conventional oil cooler.

FIG. 9 is a perspective view of an oil shield plate and an oil guide plate.

FIG. 10 is a longitudinal sectional view of a main part of another conventional oil cooler.

[Explanation of symbols]

 25 Oil Cooler Main Body 27 Inner Tube 29 Outer Tube 31 Inner Fin 33 Oil Flow Path 35 Inlet Pipe 37 Outlet Pipe 41 Cooling Water Flow Path 43 Oil Partition 49 49 Gap

Claims (1)

[Scope of utility model registration request] 1. A double-tube oil cooler body (25) consisting of an inner pipe (27) and an outer pipe (29), formed axially between the inner pipe (27) and the outer pipe (29). A radiator built-in type oil cooler in which an inlet pipe (35) and an outlet pipe (37) that open to the selected oil flow path (33) are fixed to each other.
Of the oil cooler main body (25) between the inner pipe (27) and the outer pipe (29) by extending outward from the position of at least one of the inlet pipe (35) and the outlet pipe (37). A substantially U-shaped oil partition (43) that opens to the extension end (25a) side and guides the oil to the extension end (25a) side is provided with an extension side inlet pipe (35) or outlet pipe (37). Is provided so as to surround the oil inlet / outlet port (45, 47) of the oil partition port (4) inside the oil inlet / outlet port (45, 47).
An oil cooler characterized in that a gap (49) for oil passage is provided in 3).