JPH10206045A - Oil cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erosion of an aluminum oil cooler at the operating environment with the forceful flow of the cooling water of high temperature and large quantity. SOLUTION: The aluminum oil cooler comprises a first plate 11 and a second plate 12 of aluminum dishes and a corrugated fin plate 13, a unit member e comprises the first plate 11 and the second plate 12 facing each other with the fin plate 13 between them, the unit members e are laminated into multiple layers by engaging downward pipe parts 12a on both sides of the second plate of the upper unit member e with upward pipe parts 11a on both sides of the lower unit member e and inserting spacers 14 on the outside of engaged parts, fixing flanges 15 are attached to the upward pipe parts 11a on both sides of the upper most stage of the first plate 11, a shielding plate 17 of high strength aluminum alloy being provided with the slit 17a at the position the gap width is equivalent to the gap widths between the unit members e at both side parts and of predetermined size is attached to the edge of the arm pieces 14a arranging the externally extended arm pieces 14a to the spacers 14 of the upper part and the lower part on the inlet side of a cooling water and the direct collision of the cooling water to the side surface of the cooler is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil cooler used in a vehicle engine, and more particularly to a multi-plate oil cooler.

[0002]

2. Description of the Related Art An example of a multi-plate type oil cooler Oc used for an engine of a large vehicle such as a truck or a construction vehicle is shown in FIG. A plate 1 comprises an upward dish-shaped second plate 2 and a wavy fin plate 3 having a large number of through-holes disposed on the entire surface and disposed between the two plates. It has a portion 1a, has a protrusion 1b on the periphery, and has a large number of protrusions 1c on the upper surface except for the one at the top, and the second rate 2 except for the one at the bottom. Downward pipes 2a are provided on both sides in the longitudinal direction, and flanges 2 which protrude around the periphery are provided.
b, and a large number of protrusions 2c are provided on the lower surface.

A first plate 1 and a second plate 2 face each other with a fin plate 3 interposed therebetween to form a unit member e for heat exchange, and a lower pipe portion 2a of the second plate 2 of the upper unit member e is formed. The first plate 1 of the uppermost unit member e is stacked by inserting the upward pipe portion 1a of the first plate 1 of the lower unit member e on the inside and fitting the annular gap 4 on the outside on the outer side. A fixing flange 5 is fitted to the engine block in the upward pipe portion 1a, and a reinforcing plate 6 is provided on the lower surface on both sides of the lowermost second plate 2.
Is arranged.

When the above members are made of stainless steel, a brazing material is arranged between the members in a foil shape, and the whole is put together by a clamp member, and the whole is put in a brazing furnace for a predetermined time (about 15 minutes). ) The brazing material is contained and melted, and the members are joined together.

[0005] The thus formed oil cooler O
c is housed in a casing C provided on the side of the engine, and is used by fixing the flange 5 mounted on the uppermost first plate 1 to the cylinder block B. while oil heated in the moving parts or the like flows from the inlet port B ₁ of the cylinder block B side, the casing C is introduced from the side opposite to the inlet of the oil coolant in the radiator side by a pump, each Unit member e
Through the gap and around the unit member e with each other, heat exchange is performed between the oil, the cooled oil is returned from the outlet hole B ₂ on the opposite side to the oil pan, the cooling water to flow into the cylinder side Has been made.

[0006]

By the way, stainless steel is used for the components of the oil cooler, such as the first and second plate-like plates 1, 2, the fin plate 3, the gap 4, and the like. In recent years, aluminum has been used to reduce the weight of vehicles. In this case, a brazing material layer is applied to the surface where each component needs to be joined, and the surface in contact with cooling water is sacrificed. An aluminum clat material coated with a corrosive corrosion layer is used.
A large flow of cooling water heated to about 400 l / min to 500 l / min is flowing into the casing C, and the large flow of cooling water is violently applied to the side surface of the oil cooler Oc (the side surface on the cooling water inflow side). If they are used for a long time, they protrude from the first and second plates 1 and 2 at the brazing portion, ie, each unit member e.
Erosion occurs due to the impact of the cooling water at the joint b, and corrosion is promoted from that portion.

Accordingly, the present invention is to prevent an erosion from occurring at a joint portion of opposed plates even when used as an aluminum oil cooler in an environment where a high temperature and a large flow rate of cooling water is flowing. As an issue.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention comprises a first downward plate-shaped plate made of aluminum, a second upward plate-shaped plate, and a fin plate having a large number of corrugated through holes. The first plate includes an upwardly directed pipe portion on both sides in the longitudinal direction and has a protruding collar on the peripheral edge, and the second plate includes a downwardly directed pipe portion on both sides in the longitudinal direction and has a protruding collar on the peripheral edge, and has an inside protruding portion. The first plate and the second plate face each other with a fin plate interposed therebetween to form a unit member, and the downward pipe portion of the second plate of the upper unit member and the upward pipe portion of the lower unit member are fitted and fitted to the outside thereof. The spacers are fitted to each other to stack the unit members in a plurality of stages, and a fixing flange is fitted to the upward pipe portions on both sides of the uppermost unit member, and the above members are brazed and joined. As a cooler, an arm piece extending outward is provided on a pair of spacers on the cooling water inflow side, and the tip of the arm piece has a size covering the side surface of the laminated unit member, and a gap between the upper and lower unit members on both sides. It is characterized in that a shielding plate made of a high-strength aluminum alloy or a hard anodized aluminum having a slit having a width substantially equal to the corresponding gap is detachably attached.

[0009]

1 to 3 illustrate an example of an oil cooler Oc according to the present invention. Reference numeral 11 denotes a first plate made of an aluminum clat material (for example, JIS3003) having a sacrificial corrosion layer (for example, JIS7072) on the upper surface and a brazing material layer (for example, JIS4343, 4045) on the lower surface. It is formed so as to form a rectangular or elliptical downward dish, has an upward pipe portion 11a on both sides in the longitudinal direction, and has an overhanging brim 11b on the periphery. An interval protrusion 11c is provided.

Numeral 12 denotes a second plate paired with the first plate 11, which is made of the same aluminum clat material as the first plate having the brazing material layer applied on the upper surface and the sacrificial corrosion lower layer applied on the lower surface. The first plate 11 is formed in a rectangular or elliptical upward dish shape so as to face the first plate 11, and has a downward pipe portion 12a for fitting an upward pipe portion of the first plate on both sides in the longitudinal direction, and an overhanging brim on the periphery. 12b, and a large number of spacing protrusions 12c are provided on the lower surface except for the lowermost one.

A fin plate 13 is provided between the first plate 11 and the second plate 12 facing each other.
It is made of an aluminum clat material having a brazing material layer attached to the upper and lower surfaces, and is formed in a wavy shape with a large number of through holes on the entire surface.

Then, a fin plate 13 is provided on the inner side, and the first plate 11 and the second plate 12 face each other to form a unit member e for heat exchange. Outside the downwardly facing pipe portions 12a on both sides, a spacer 14 made of an aluminum clat material having a ring shape and having a brazing material layer adhered to an inner peripheral surface and upper and lower surfaces thereof (however,
The upper and lower parts on the cooling water inflow side are provided with outwardly extending arm pieces 14a), and the inside thereof is fitted with the upward pipe portion 11a of the first plate 11 of the lower unit member e. Then, the unit members e are stacked in a plurality of stages, and the upward pipe portions 11 on both sides of the uppermost unit member e are stacked.
a, a fixing flange 15 made of an aluminum clat material having a fitting hole covered with a brazing material layer on the inner surface thereof is fitted thereto, and the lower surface of both sides of the second plate 12 of the lowermost unit member e has a brazing material on the upper surface. A reinforcing plate 16 made of an aluminum clat material having a layer attached thereto and a sacrificial corrosion layer attached thereon is provided on the lower surface and the peripheral surface, and this is housed in a furnace and heated, and each member is brazed and joined. .

After the members are integrated, the upper and lower arm pieces 14 of the upper and lower spacers 14 on the cooling water inflow side (the right side in FIG. 1).
a, aluminum alloy (e.g., JIS 5083 containing 4.0 to 4.9% Mg, 0.4 to 0.8% Si, 0.8 to 0.8% Mg) JIS6061-T6 containing 1.2%, J containing 4.0 to 5.0% Zn and 1.0 to 2.0% Mg
An aluminum alloy such as IS7N01) or an aluminum plate whose surface is hardened and subjected to alumat treatment, and has a size covering one side surface of the oil cooler Oc. As shown in FIG. At a position corresponding to the gap, a shield plate 17 provided with a plurality of slits 17a having a width substantially equal to the gap is detachably attached by screws 18.

Thus, the oil cooler Oc is housed in the casing C on the engine side as shown in FIG. 1, and is fixed to the cylinder block B by the flange 15 provided on the uppermost unit member e for use. When used, the oil heated by the engine sliding parts and so on
1 is taken into each unit member e from the inlet hole B ₁ (upper left side in FIG. 1), and at the same time, the temperature on the radiator side is 80 °.
Although ℃ about the cooling water is introduced from the side opposite to the oil inlet B ₁ through the pump, the cooling water first impinges on the shielding plate 17, each unit member passes through the slits 17a of each side shield 17 will pass through the gap and around the unit member e with each other e, heat exchange is performed between the oil flowing through the respective unit members e, the oil pan cooled oil is from the opposite side of the outlet hole B ₂ And the cooling water flows to the cylinder side.

At this time, a large amount of cooling water flowing into the casing C first strikes the shielding plate 16, and then the slits 1 arranged in the gaps between the upper and lower unit members e of the oil cooler Oc.
6e, the casing C enters the casing C, so that the torrent cooling water does not directly collide with the side surface of the oil cooler Oc as in the past, so that the projecting flange 11b of the peripheral edge of the first plate 11 and the second plate 12 of each unit member e. , 12b are not eroded. Also, since the outer surface of each unit member e is covered with a sacrificial corrosion layer, their corrosion is prevented.

In the illustrated example, the second unit member e in the upper
While the upward pipe 11a of the lower unit member e is fitted inside the downward pipe 12a of the plate 12, the relationship between the inside and the outside may be reversed. The spacer 14 provided with the arm piece 14a for screwing the shielding plate 16 is not limited to the uppermost one and the lowermost one as shown in the figure, but may be any as long as it forms a pair vertically. further,
In the above example, the case where the oil cooler is disposed in the casing has been described. However, the oil cooler may be mounted in the engine block.

[0017]

The present invention provides an aluminum multi-plate oil cooler used for an engine of a heavy-duty vehicle, in which a pair of upper and lower spacers on the inflow side of the cooling water are provided with outwardly extending arms, and the tips of these arms are provided. A high-strength aluminum alloy or hard anodized aluminum having a size that covers the side surfaces of the laminated unit members and a plurality of slits having widths substantially equal to the gaps corresponding to the gaps between the upper and lower unit members on both sides is provided. The shield plate made of aluminum is detachably attached, so that during use, it is possible to reliably prevent a large amount of high-temperature cooling water that flows vigorously through the pump from directly colliding with the side of the oil cooler, Erosion does not occur at the joint between the first plate and the second plate at the periphery of each unit member.

[Brief description of the drawings]

FIG. 1 is a partially cut front view of an oil cooler according to the present invention.

FIG. 2 is a plan view of the right half of the oil cooler.

FIG. 3 is a side view of FIG. 1 as viewed from the right side.

FIG. 4 is a sectional view of a conventional multi-plate oil cooler.

[Explanation of symbols]

 11 First plate 11a Upward pipe portion 11b Overhanging piece 12 Second plate 12a Downward pipe portion 12b Overhanging piece 13 Fin plate 14 Spacer 14a Arm piece 15 Flange 17 Shielding plate 17a Slit e Unit member

Claims (1)

[Claims] 1. A first dish-shaped downward dish made of aluminum.
A first plate having an upward pipe portion on both sides in the longitudinal direction, and a second plate having an upward pipe portion on both sides in the longitudinal direction. With a pipe section,
The first plate and the second plate face each other with a fin plate interposed therebetween to form a unit member, and the downward pipe portion of the second plate of the upper unit member and the upward pipe portion of the lower unit member are fitted together, and In an oil cooler in which a spacer is fitted to the outside and the unit members are stacked in a plurality of stages, a flange for fixing is fitted to an upward pipe portion on both sides of the uppermost unit member, and the above members are brazed and joined. An arm piece extending outward is provided on a pair of spacers on the inflow side of the cooling water, and the tip of the arm piece has a size covering the side surface of the laminated unit member, and corresponds to the gap between the upper and lower unit members on both sides. An oil cooler to which a shield plate made of a high-strength aluminum alloy having a slit having a width substantially equal to the gap or a hard anodized aluminum is attached.