RU2576728C1 - Radiator for cooling system of internal combustion engine - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention relates to heat exchangers, in particular for radiators of cooling system of internal combustion engines. Internal combustion engine cooling system radiator comprises inlet and outlet headers from heat-resistant glass-filled polyamide with bottoms of sheet steel with anticorrosion coating. In bottoms of fixed ends of the aluminium tubes, fixed by burnishing cavities tubes staggered in two rows in lamellae. Segments are arranged with pitch 1.2-1.5 mm and are made by sheet stamping of aluminium foil thickness 0.06-0.09 mm with formation of flanging. Bottoms are fixed on reservoirs by rolling jagged edges heads. Collectors are equipped with at least one threaded plug from heat-resistant glass-filled polyamide for temperature sensor and l-shaped retainers with inclined guides for mounting casing cooling fan. Said retainers are arranged at least one at each collector and made integral with it.

EFFECT: invention provides increased durability of the radiator.

3 cl, 7 dwg

Description

The invention relates to the field of heat exchanger apparatus, namely, radiators of the cooling system of internal combustion engines.

The prior art radiator for the cooling system of an internal combustion engine (see patent RU 2280831, CL F28D 1/053, publ. 07.27.2006). The developed design of the radiator provides an increase in the strength of the connection of flat oval tubes with tube boxes, a decrease in hydraulic losses in these tubes, and an increase in the thermal efficiency and reliability of the radiator section. The radiator section of the cooling system of the internal combustion engine contains a bunch of corridor-located flat-oval tubes inserted and soldered into the holes of the upper tube box and into the holes of the lower tube box. Fins, collectors, flat oval tubes are made with oval shaped ends expanding outwards; the tube boxes are made with the edges of the holes flanged in shape to the outwardly extending ends of the flat oval tubes in the upper tube box and the edges of the holes in the lower tube box; the connections of the oval-shaped ends of the oval-shaped flat oval tubes expanding with the tube boxes are made by soldering with zinc solder.

Also known is a radiator of an engine cooling system, for example, an automobile (see patent RU 2230201, class F01P 11/02, publ. 04/20/2003), containing the upper and lower tanks and a core located between them, consisting of tubes through which the cooled liquid flows and winding channels for cooling air formed from a porous metal filling the space between the said tubes, side walls and front and rear surfaces of the core and obtained in the indicated volume from the molten compact metal by filling eniya space of said particulate material having a melting point above the melting temperature of the desired metal porous, granular material and heating said tubes to a temperature close to the melting temperature of the metal contact, filling the cavities between the grains of granular material that molten metal and removing the granular material after cooling. Channels for cooling air are also formed by through gaps not filled with porous metal and obtained in the indicated core volume by establishing partitions between the said tubes, the melting temperature of the material of which is higher than the melting temperature of the compact metal, obtaining porous metal in the remaining core volume and removing the material of the partitions in the process and after cooling.

The closest in technical essence and the achieved result is a radiator of a cooling system of an internal combustion engine, containing inlet and outlet manifolds with bottoms, in which the ends of the tubes are fixed, fixed horizontally and parallel to each other in the lamellas by means of the mandrels of the tube cavities, in which the tubes are made flat-oval and are located in two rows, with the rows oriented vertically, and the large sides of the tubes horizontally (see patent RU 148170, class F28D 1/053, publ. 11/27/2014). The disadvantages of the known device are the non-optimal choice of geometry and structural materials, which leads to insufficiently effective thermal interaction of the radiator elements and, as a consequence, its rapid failure.

The objective of the invention is to remedy these disadvantages.

The technical result is to increase the durability of the radiator.

The problem is solved, and the technical result is achieved by the fact that the radiator of the cooling system of the internal combustion engine contains inlet and outlet manifolds of heat-resistant glass-filled polyamide with steel sheet bottoms with anti-corrosion coating, in which the ends of the aluminum tubes are fixed, fixed by burning the tube cavities in a checkerboard pattern in two rows in lamellas arranged with a pitch of 1.2-1.5 mm and made by sheet stamping of aluminum foil with a thickness of 0.06-0.09 mm with about By flanging, the bottoms are fixed to the collectors by rolling the tooth edges of the bottoms, and the collectors are equipped with at least one threaded plug made of heat-resistant glass-filled polyamide for the temperature sensor and L-shaped clamps with inclined guides for mounting the cooling fan casing, located at least one on each collector and executed along with it. Between the collectors and the bottoms are preferably located gaskets made of ethylene propylene rubber. The tubes are preferably fixed to the bottoms by means of flaring.

In FIG. 1 shows a General view of the proposed radiator;

in FIG. 2 is a diagram of a proposed radiator, front view;

in FIG. 3 - same, left view;

in FIG. 4 - fastening of tubes in lamellas;

in FIG. 5 - fixing the bottoms on the collectors;

in FIG. 6 - the same, in the context;

in FIG. 7 - L-shaped latches with inclined guides for mounting the cooling fan casing.

The proposed radiator of the internal combustion engine cooling system consists of inlet 1 and exhaust 2 collectors, between which there is a heat exchange part, consisting of aluminum tubes 3 and lamellas 4. The collectors 1, 2 are made of heat-resistant glass-filled polyamide grade PA66 - GF30. This material allows you to withstand high pressure and high temperature of the coolant, which significantly increases the life of the radiator. The collectors 1, 2 are equipped with bottoms 5 made of sheet steel with a corrosion-resistant coating (also resistant to prolonged exposure to aggressive media), in which the ends of the tubes 3 are fastened by flaring. Between the collectors 1, 2 and bottoms 5 there are gaskets 6 made of ethylene propylene rubber (EPDM) capable of ensuring stable operation of the radiator with a significant difference in coolant temperatures.

The lamellas 4 are arranged with a pitch of 1.2-1.5 mm and are made by sheet metal stamping from aluminum foil with a thickness of 0.06-0.09 mm. The indicated step and thickness of the initial foil provide the optimal aerodynamic and thermotechnical characteristics of the radiator, evenly distributing the heat load throughout the heat exchange part and minimizing the thermal loads that occur during heating and cooling. Plastic deformation of the initial flat billet during sheet stamping of the lamella 4 forms a flange 7 along the contour of the punched hole, which increases the contact area of the lamella 4 and tube 3, improving the heat engineering characteristics of the radiator.

The tubes 3 are located in the lamellas 4 in a checkerboard pattern in two rows and are fixed by burning their cavities. The specified location of the tubes 3 also contributes to uniform heating / cooling of the entire heat-exchange part of the radiator, and therefore reduces the loads arising from thermal deformations and increases the life of the radiator. Donya 5 are securely fixed to collectors 1, 2 by rolling (bending 90 degrees) of the serrated edges of 8 bottoms 5.

At least one of the collectors 1, 2 is equipped with a universal threaded plug 9 for the temperature sensor. The plug 9, like the collectors 1, 2, is made of heat-resistant glass-filled polyamide, which equalizes their thermal expansion, eliminating the possibility of cracking and leaks during the entire life of the radiator. Due to the hexagonal hole made in the central part, depending on the vehicle equipment, the plug 9 can be removed using the appropriate key.

For mounting the casing of the cooling fan (diffuser) on each collector 1, 2, at least one L-shaped latch 10 with two inclined guides 11 is made at the same time with it. The guides 11 are made in the form of triangular protrusions, providing smooth movement and further fixing of the casing. The proposed design provides the ability to easily mount and dismantle the casing, while reducing the likelihood of damage when replacing the fan, and thus increasing the life of the radiator. Moreover, the implementation of the clamps 10 and the guides 11 of the heat-resistant glass-filled polyamide at the same time with the collectors 1, 2 provides the necessary flexibility and strength, and also eliminates the occurrence of thermal loads at the junction of the elements.

Thus, due to the total implementation of the proposed set of distinctive features (a combination of design features, geometry and selected materials), the durability of the radiator as a whole is significantly increased, and the effect of increasing the service life from the simultaneous implementation of all the signs exceeds the expected total effect of them taken separately.

Claims (3)

1. Radiator of a cooling system of an internal combustion engine, comprising intake and exhaust manifolds made of heat-resistant glass-filled polyamide with steel sheet bottoms with a corrosion-resistant coating, in which the ends of aluminum tubes are fixed, fixed by stitching the tube cavities in a staggered pattern in two rows in lamellas located with in steps of 1.2-1.5 mm and made by sheet metal stamping from aluminum foil 0.06-0.09 mm thick with the formation of a flange, and the bottoms are fixed to the collectors by tsovki jagged edges bottoms, and the collectors are provided with at least one threaded plug pyrex glass fiber reinforced polyamide for the temperature sensor and the L-shaped catches with ramps for the fan casing assembly cooling arranged at least one for each manifold and made integral with it. 2. The radiator according to claim 1, characterized in that between the collectors and the bottoms are gaskets made of ethylene-propylene rubber. 3. The radiator according to claim 1, characterized in that the tubes are fixed in the bottoms by means of flaring.

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