JPH037748Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention relates to a cooling plate for a water-cooled oil cooler. More specifically, the present invention relates to improving the heat dissipation performance of this cooling plate.

(b) Background of the technology As equipment that uses oil, such as automobiles and machine tools, has come into widespread use, oil coolers with various structures for cooling heated oil have come to be provided. It's coming.

In such an oil cooler,
There is also a model using a circular cooling plate as described in 28219.

Figure 3 shows the general structure of an oil cooler using a circular cooling plate.
A structure is shown in which circular cooling plates 2 are laminated inside a case body 1 in which cooling is circulated. The cooling plate 2 has a cooling oil outlet hole 5 drilled in the center, and an oil inlet 3 and an oil outlet 4 drilled at approximately symmetrical positions through the outlet hole 5, so that the heated oil can flow through the cooling plate 2. Heat is radiated to the cooling water W circulating outside the cooling plate 2 between the oil inlet 3 and the oil outlet 4.
The cooled oil then flows into an oil filter 6 communicating with the oil outlet 4, and is sent to a predetermined device through an outflow hole 5.

This circular cooling plate 2 has a problem in that the oil flow path from the oil inlet 3 to the oil outlet 4 has uneven flow resistance. That is,
This is because there is a difference in flow path distance between the inner circumference and the outer circumference of the oil flow path. Therefore, as shown in FIG. 4, oil mainly flows to the inner circumference where the flow distance is short (flow resistance is low).

However, as described above, this inner periphery is adjacent to the outflow hole 5 through which the cooled oil flows out, and the cooled oil ends up being heated again. Furthermore, if only a small amount of oil flows around the outer periphery where the cooling water W is circulating, the overall heat dissipation of the oil will also be reduced.

For this reason, there is a demand for the development of means for improving the oil flow pattern of the circular cooling plate.

(C) Prior Art and Problems Conventional means for improving the oil flow pattern of a circular cooling plate include those shown in FIGS. 5 to 7, for example.

This conventional example is based on the actual application related to the applicant's earlier proposal.
58-119102 (see Utility Model Application Publication No. 60-27273), the circular plate 2 is connected to a pair of plates 2a and 2b.
The structure is such that regularly arranged recesses 7 as shown in FIG. 5 are provided in parts other than the above-mentioned outflow hole 5, oil inlet 3, and oil outlet 4, and by joining, the plates 2a, The openings of the recesses 7 of 2b partially intersect with each other to form an oil flow path 8. In the oil flow path 8 formed in this way, oil flows up and down in a zigzag pattern as shown in FIG. It will flow to Therefore, the uneven oil flow shown in FIG. 4 is disturbed, and the oil is distributed evenly.

In addition, the present applicant has also proposed a means for improving the arrangement of the recesses 7 described above in Utility Model Application No. 59-95784 (Utility Model Application No. 59-95784).
61-13177) and Utility Model Application No. 1982-131582 (see Utility Model Application No. 61-48280), with the aim of promoting equal distribution of oil.

Although these conventional examples are means for ensuring uniform oil distribution and can considerably solve the aforementioned problems such as heating of cooling oil and reduction in oil heat dissipation, they cannot be said to be sufficient.

(iv) Purpose of the invention The present invention was made in view of the conventional example described above, and its purpose is to improve the heat dissipation performance of the cooling plate by actively circulating oil around the outer circumference of the circular cooling plate. It's about doing.

(e) Structure of the invention In order to achieve this object, the cooling plate of the water-cooled oil cooler according to the invention has a cooling oil outlet hole drilled in the center and two holes formed at substantially symmetrical positions through the outlet holes. A pair of circular plates each having an oil inlet and an oil outlet, and regularly arranged recesses in areas other than the outflow hole, oil inlet, and oil outlet. In a cooling plate of a water-cooled oil cooler which is joined so as to intersect face-to-face to form an oil flow path, a recess having a circular opening shape on a plurality of concentric circles centered on the center point of the outflow hole. The diameters of the openings of the recesses arranged on each concentric circle line are the same on the same line, and the diameter increases sequentially along the line separating from the outflow hole, and the outer periphery of the opening of all the recesses The spacing between them is the same.

(F) Embodiment of the invention Hereinafter, an embodiment of the cooling plate for a water-cooled oil cooler according to the invention will be described based on FIGS. 1 and 2.

Figure 1 shows the arrangement of the recesses 7. The openings of the recesses 7 are circular, and the diameters Da, Db, and Dc of the openings of the recesses 7 on the same lines A, B, and C are the same. . These lines A, B, and C are on concentric circles centered on the center point of the outflow hole 5, and the diameter Db of the opening of the recess 7 on each line B and A increases as the distance from the line C closest to the outflow hole 5 increases. , Da gradually increases.
And the distance between the outer peripheries of the openings of all the recesses 7
Pa, Pb, and Pc are the same. That is, the lines passing through the centers of the openings of the adjacent recesses 7 and the outflow holes 5 on the same lines A, B, and C are at the same angle θ,
The passing lines of adjacent lines a, b or b, c are shifted by an angle θ' (1/2θ).

This arrangement of the recesses 7 means that the recesses 7
This means that the area where the openings of the 2
As shown in the figure, it flows mainly around the outer periphery. Although this type of oil distribution is contrary to the uniform distribution of oil inside the cooling plate 2, it actively distributes oil to the outer periphery where the heat dissipation effect is highest, and also prevents the cooling oil from flowing out. By preventing too much oil from flowing to the inner periphery near the outflow hole 5, the heat dissipation performance of the cooling plate 2 can be improved.

(g) Effects of the invention As described above, the cooling plate of the water-cooled oil cooler according to the invention actively flows oil around the outer circumference of the cooling plate, which has a high heat dissipation effect, and is also close to the outflow hole from which the cooling oil flows out. This has the effect of improving heat dissipation performance because not much oil flows around the inner circumference. Furthermore, this improvement in heat dissipation performance makes it possible to reduce the number of stacked cooling plates, which has the effect of downsizing the water-cooled oil cooler.

Furthermore, since the arrangement of the recesses in the cooling plate of the water-cooled oil cooler according to the present invention can be expressed numerically, it has the effect of facilitating design and manufacturing.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts showing an embodiment of the cooling plate of a water-cooled oil cooler according to the present invention, FIG. 2 is a plan view of the entire same and shows the oil distribution form,
The figure is a side view showing the general structure of a water-cooled oil cooler using a circular cooling plate, Figure 4 is an enlarged plan view showing the oil distribution form in the cooling plate of Figure 3, and Figure 5 is a conventional example. 6 is an enlarged sectional view of the main part of FIG. 5, and FIG. 7 is an enlarged plan view of the main part of FIG. 5. 2...Cooling plate, 2a, 2b...Plate material, 3
...Oil inlet, 4...Oil outlet, 5...Outflow hole, 7...Recess, 8...Oil flow path.

Claims (1)

[Scope of utility model registration request] A cooling oil outflow hole drilled in the center, an oil inlet and an oil outlet drilled at substantially symmetrical positions through the outflow hole, the outflow hole, the oil inlet,
A pair of circular plates each having regularly arranged recesses in a portion other than the oil outlet are joined together such that the openings of the recesses of both plates partially intersect with each other to form an oil flow path. In a cooling plate for a water-cooled oil cooler, recesses having circular openings are arranged on a plurality of concentric circles centered on the center point of the outflow hole, and the openings of the recesses arranged on each concentric circle are A water-cooled oil cooler characterized in that the diameters are the same on the same line and gradually increase along the line separating from the outflow hole, and the intervals between the outer peripheries of the openings of all the recesses are the same. cooling plate.