An engine cooling system with a baffle structure

Abstract

The utility model provides a kind of oil radiator cover with baffle structure and engine cooling system, belong to engine cooling system technical field, including cover shell body, the cover shell body has the inner cavity for accommodating oil radiator core part, and is provided with cooling liquid inlet and outlet, the position of the inner cavity close to cooling liquid inlet is provided with the baffle structure for guiding cooling liquid to flow to the lower area of oil radiator core part, and the upper edge of baffle structure and the upper end surface of oil radiator core part installed in the inner cavity form the top gap with height 3±0.5mm.The utility model significantly increases the effective cooling liquid flow and heat exchange efficiency of radiator core part area, to substantially improve the heat transfer capacity of oil radiator as a whole.Although the top gap is reduced, it slightly increases water side pressure drop, but after weighing, its contribution to the improvement of heat transfer performance is much greater than the influence of pressure drop increase, finally improves the comprehensive performance of radiator.

Description

Technical Field

[0001] This utility model belongs to the technical field of engine cooling system, and in particular relates to an oil cooler cover with a baffle structure and an engine cooling system. Background Technology

[0002] High-power engines are all designed with an oil cooler for cooling the lubrication system oil. The oil cooler cover is used to install the oil cooler, forming a circulation chamber for external coolant to cool internal oil, thus realizing the oil cooling circulation regulation of high-power engines.

[0003] In the entire flow direction, such as Figure 4 As shown, the temperature at the lower end of the oil cooler core is generally higher than that at the upper end. This is mainly because most of the coolant is guided to the top after entering the flow channel. Therefore, more coolant enters the upper channel of the oil cooler core, resulting in a lower temperature, but the overall heat transfer capacity is lower. Utility Model Content

[0004] This invention addresses the problem of low overall heat transfer capacity in traditional oil cooler covers. It provides an oil cooler cover with a baffle structure and an engine cooling system that increases the flow rate in the core area of ​​the oil cooler by reducing the surrounding gaps, thus significantly improving the heat transfer capacity of the oil cooler.

[0005] The technical solution adopted by this utility model for an oil cooler cover with a baffle structure and an engine cooling system is as follows:

[0006] An oil cooler cover with a baffle structure includes a cover body having an inner cavity for accommodating an oil cooler core and having a coolant inlet and an outlet. The feature is that a baffle structure is provided in the inner cavity near the coolant inlet to guide coolant flow to the lower region of the oil cooler core, and a top gap of 3±0.5mm is formed between the upper edge of the baffle structure and the upper end face of the oil cooler core installed in the inner cavity.

[0007] A further improvement of the above-mentioned technical solution of this utility model is that the baffle structure is a metal strip, and the metal strip is welded and fixed to the inner cavity wall of the cover body.

[0008] A further improvement of the above-mentioned technical solution of this utility model is that the cross-sectional shape of the baffle structure is one of a rectangle, a trapezoid, or an arc.

[0009] A further improvement of the above-mentioned technical solution of this utility model is that: the baffle structure is arranged along the side wall of the inner cavity and is located downstream of the coolant inlet, so that the coolant flowing in from the inlet is blocked by the baffle structure and guided downward.

[0010] A further improvement of the above-mentioned technical solution of this utility model is that a coolant flow channel is formed between the baffle structure and the bottom wall of the inner cavity, and the coolant flow channel is configured to guide the coolant to the middle and lower regions of the oil cooler core.

[0011] A further improvement of the above-mentioned technical solution of this utility model is that the height of the top gap accounts for 5%-15% of the distance from the upper end face of the oil cooler core to the inner wall of the top of the inner cavity when it is installed.

[0012] An engine cooling system includes an oil cooler core and an oil cooler cover for mounting the oil cooler core, wherein the oil cooler cover is the oil cooler cover with a baffle structure described above.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This invention effectively guides the coolant downwards through a baffle structure positioned near the inlet, increasing the coolant flow to the lower region of the oil cooler core and solving the problems of insufficient coolant and excessive temperature at the lower end. Simultaneously, by precisely controlling the gap (approximately 3mm) between the top of the baffle structure and the upper part of the radiator core, this invention significantly reduces the coolant flow through this gap, forcing more coolant to flow through the main heat transfer area (core region) of the radiator core. This measure effectively balances the coolant flow and temperature distribution between the upper and lower regions of the oil cooler core.

[0015] In summary, this invention significantly increases the effective coolant flow rate and heat exchange efficiency in the core area of ​​the radiator, thereby greatly improving the overall heat transfer capacity of the oil cooler. Although reducing the top gap slightly increases the water-side pressure drop, after careful consideration (especially with a 3mm gap), its contribution to the improvement of heat transfer performance far outweighs the impact of the increased pressure drop, ultimately improving the overall performance of the radiator. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of an oil cooler cover with a baffle structure provided by this utility model;

[0017] Figure 2 and Figure 3 This is a cross-sectional structural diagram of an oil cooler cover with a baffle structure provided by this utility model;

[0018] Figure 4 This is a temperature cloud map of a traditional oil cooler cover during use;

[0019] Figure 5 This is a temperature cloud map of the oil cooler cover with baffle structure of this utility model during use.

[0020] In the attached diagram: 1. Cover body; 2. Inner cavity; 3. Baffle structure. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0022] like Figures 1-3 As shown, the oil cooler cover of this utility model has a cover body 1 typically made of cast aluminum alloy (such as ZL101A-T6 material), with an inner cavity 2 forming inside to accommodate the oil cooler core. Coolant enters the inner cavity 2 through the inlet, flows through the outside of the oil cooler core for heat exchange, and then flows out from the outlet.

[0023] In this invention, a metal strip is welded and fixed as a baffle structure 3 in the inner cavity 2 of the casing body 1 near the coolant inlet. This baffle structure 3 is a continuous or discontinuous strip structure, with its length direction at least partially surrounding the circumference of the coolant inlet. The cross-sectional shape of the baffle structure 3 is rectangular, trapezoidal, or arc-shaped. The specific installation position of the baffle structure 3 in this invention needs to be designed according to the location of the inlet and the expected flow field. Its core function is to block and guide the newly entered coolant downwards, allowing it to more quickly cover the lower area of ​​the oil cooler core.

[0024] The baffle structure 3 is fixed to the inner wall of the cover body 1 by welding (such as argon arc welding), and the material can be a metal compatible with the cover body 1 (such as an aluminum alloy strip). This method does not require modification of the original cover casting mold and has the advantages of simple implementation and low cost.

[0025] A precisely controlled top gap is reserved between the upper edge of the baffle structure 3 and the upper end face of the oil cooler core after installation. The height of this top gap is preferably set to about 3 mm. This dimension is a key parameter verified by fluid analysis and experiments: its value is small enough to significantly limit the flow of coolant through the non-primary heat transfer area between the top of the radiator core and the casing body 1; at the same time, its value is not too small to avoid excessive increase in coolant flow resistance (pressure drop) and ensure smooth coolant circulation.

[0026] The restricted coolant flow is redistributed to the main area of ​​the radiator core (i.e., the area below the baffle structure 3), especially the lower area where the flow was originally insufficient, thereby significantly increasing the flow rate and velocity of the coolant that effectively participates in heat exchange.

[0027] Figure 4 The temperature distribution (temperature cloud map) of a conventional radiator cover without this baffle structure 3 during operation is shown. It can be clearly seen that the temperature in the lower area of ​​the oil cooler core is significantly higher than that in the upper area (darker color), which is a direct manifestation of uneven coolant distribution and poor heat dissipation at the lower end.

[0028] Figure 5 The temperature distribution of the radiator cover with baffle structure 3 of this utility model during operation is shown. (Comparison) Figure 4 It can be clearly observed that the temperature distribution in the core area of ​​the entire oil cooler becomes more uniform, and the high-temperature area is significantly reduced or even disappears. This fully demonstrates the remarkable effect of this utility model in balancing the temperature field and improving the overall heat transfer efficiency.

[0029] In the above embodiments, this invention provides an oil cooler cover with a baffle structure. This invention, through the baffle structure positioned near the inlet, effectively guides the coolant downwards, increasing the coolant flow to the area below the core of the oil cooler and solving the problems of insufficient coolant and excessive temperature at the lower end. Simultaneously, by precisely controlling the gap (approximately 3mm) between the top of the baffle structure and the upper end of the radiator core, this invention significantly reduces the coolant flow through this top gap, forcing more coolant to flow through the main heat transfer area (core area) of the radiator core. This measure effectively balances the coolant flow and temperature distribution in the upper and lower areas of the oil cooler core. In summary, this invention significantly increases the effective coolant flow and heat exchange efficiency in the radiator core area, thereby greatly improving the overall heat transfer capacity of the oil cooler. Although reducing the top gap slightly increases the water-side pressure drop, after careful consideration (especially with a 3mm gap), its contribution to the improvement of heat transfer performance far outweighs the impact of the increased pressure drop, ultimately improving the overall performance of the radiator.

[0030] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. An oil cooler cover with a baffle structure, comprising a cover body (1), the cover body (1) having an inner cavity (2) for accommodating the core of the oil cooler, and provided with a coolant inlet and an outlet, characterized in that: The inner cavity (2) is provided with a baffle structure (3) near the coolant inlet to guide the coolant to the lower area of ​​the oil cooler core, and the upper edge of the baffle structure (3) and the upper end face of the oil cooler core installed in the inner cavity (2) form a top gap with a height of 3±0.5mm.

2. The oil cooler cover with a baffle structure according to claim 1, characterized in that: The baffle structure (3) is a metal strip, which is welded and fixed to the inner cavity (2) wall of the cover body (1).

3. The oil cooler cover with a baffle structure according to claim 2, characterized in that: The cross-sectional shape of the baffle structure (3) is one of rectangle, trapezoid or arc.

4. The oil cooler cover with a baffle structure according to claim 1, characterized in that: The baffle structure (3) is arranged along the side wall of the inner cavity (2) and is located downstream of the coolant inlet, so that the coolant flowing in from the inlet is blocked by the baffle structure (3) and guided downward.

5. An oil cooler cover with a baffle structure according to claim 4, characterized in that: A coolant flow channel is formed between the baffle structure (3) and the bottom wall of the inner cavity (2), and the coolant flow channel is configured to guide the coolant to the middle and lower regions of the oil cooler core.

6. The oil cooler cover with a baffle structure according to claim 1, characterized in that: The height of the top gap is 5%-15% of the distance from the upper end face of the oil cooler core to the top inner wall of the inner cavity (2) when it is installed.

7. An engine cooling system, comprising an oil cooler core and an oil cooler cover for mounting the oil cooler core, characterized in that: The oil cooler cover is the oil cooler cover with a baffle structure as described in any one of claims 1-6.

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