Oil-water heat exchanger for railcars

Abstract

The utility model discloses a kind of oil-water heat exchangers for railcar, relate to oil-water heat exchanger technical field.The utility model includes heat exchange box, oil circuit component, water cooling tank, water pump and air cooling shell, oil circuit component is arranged in heat exchange box, include vertical pipe and serpentine pipe, surface is provided with heat conduction fin;Water cooling tank is formed circulation loop with heat exchange box by water pump, inside is equipped with staggered partition plate;Air cooling shell is sleeved in water cooling tank outside, front end is equipped with convergence mouth and air inlet.The device utilizes the composite cooling mode of water cooling and air cooling combination, heat exchange is carried out to lubricating oil by circulating cooling water, airflow is used to radiate cooling water when railcar is running simultaneously, with high heat exchange efficiency, strong adaptability, operating stably and the like advantages, effectively guarantee the reliable operation of railcar transmission system.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil-water heat exchangers, and in particular relates to an oil-water heat exchanger for rail vehicles. Background Technology

[0002] During the operation of rail vehicle transmission systems, stable control of lubricating oil temperature is crucial to ensuring equipment reliability. Traditional oil cooling devices often employ a single air-cooling or water-cooling mode, which has significant limitations: air-cooling efficiency drops sharply at low speeds or when stationary, while independent water-cooling systems require high-power circulating pumps, resulting in high energy consumption and complex structures. Existing composite heat exchangers often fail to fully utilize the forced air-cooling potential during vehicle movement, and the lack of coordinated design between cooling water circuits and air-cooling channels limits overall heat exchange efficiency. Furthermore, the contradiction between the compactness of the spatial layout and heat dissipation performance is prominent, and conventional structures struggle to achieve continuous and effective management of lubricating oil temperature under limited installation conditions, thus restricting the performance and service life of the transmission system under complex operating conditions.

[0003] To address these issues, we provide an oil-water heat exchanger for rail vehicles. Utility Model Content

[0004] The purpose of this invention is to provide an oil-water heat exchanger for a railcar. The oil circuit assembly is installed in a heat exchange box, which is connected to a water-cooled box. Water from the water-cooled box is pumped into the heat exchange box, cooling the lubricating oil in the oil circuit assembly. After heat exchange, the water flows back to the water-cooled box. An air-cooled shell is fitted over the outside of the water-cooled box, with one end leading to the outside of the railcar. During railcar operation, airflow enters the air-cooled shell, cooling the cooling water in the water-cooled box, allowing the cooling water to continuously exchange heat with the lubricating oil in the oil circuit assembly.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to an oil-water heat exchanger for a railcar, comprising a heat exchange box, an oil circuit assembly, a water-cooled box, a water pump, and an air-cooled shell. The oil circuit assembly is disposed inside the heat exchange box. The lower end of the water-cooled box is connected to the inlet end of the water pump via a pipe, and the lower end of the heat exchange box is connected to the outlet end of the water pump via a pipe. The top cover of the heat exchange box is connected to the top cover of the water-cooled box via a pipe. The air-cooled shell is fixedly fitted onto the outside of the water-cooled box. The air-cooled shell has openings at both ends near the water-cooled box. One end of the air-cooled shell is fixedly provided with a constriction opening, which gradually narrows towards the end away from the air-cooled shell. An air inlet is fixedly provided on the end face of the constriction opening away from the air-cooled shell.

[0006] A further feature of this invention is that a vertical frame is fitted inside the water-cooled box, and a set of baffles is vertically fixed in an array on the inner side of the two side plates of the vertical frame, with the baffles on both sides arranged alternately.

[0007] A further feature of this invention is that a cone-shaped cover is provided on the outer side of the water-cooled box near the constriction opening, and the end of the cone-shaped cover facing the constriction opening is a pointed cone end.

[0008] A further feature of this invention is that a turbulence elimination hood is provided on the outer side of the water-cooled box at the end away from the converging opening, and the end of the turbulence elimination hood away from the converging opening gradually narrows.

[0009] A further feature of this invention is that the oil circuit assembly includes two vertical pipes and one serpentine pipe. The two vertical pipes are respectively vertically fixed at both ends of the heat exchange box. The upper end of the vertical pipe passes through the top cover of the heat exchange box and is connected to the pipeline. The two ends of the serpentine pipe are respectively fixedly connected to the lower sidewalls of the two vertical pipes.

[0010] A further feature of this invention is that a pipe side sleeve is fixedly sleeved on the outer wall of the vertical pipe, and a number of sets of heat-conducting fins are axially arrayed and fixed on the outer wall of the pipe side sleeve, with each set of heat-conducting fins being circumferentially arrayed and fixed on the outer wall of the pipe side sleeve.

[0011] A further feature of this invention is that heat-conducting fins are fixedly arranged on the outer wall of the serpentine tube along the tube axis.

[0012] This utility model has the following beneficial effects: This invention integrates the oil circuit components into the heat exchange box and forms a closed-loop water circulation system with the water cooling box and water pump, achieving efficient heat exchange between lubricating oil and cooling water. This ensures stable control of the lubricating oil temperature under various operating conditions of the railcar, improving heat dissipation efficiency and equipment reliability.

[0013] This utility model utilizes an air-cooled shell fitted on the outside of a water-cooled box, and designs a constriction port and an air inlet structure to effectively capture the natural airflow during the movement of the railcar, and provide auxiliary air cooling for the circulating cooling water, thereby reducing the energy consumption dependence on the active cooling components and achieving synergistic optimization of energy saving and heat dissipation performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of an oil-water heat exchanger used in rail vehicles.

[0016] Figure 2 This is a side sectional view of the water-cooled box.

[0017] Figure 3 This is a schematic diagram of the water-cooled box.

[0018] Figure 4 This is an exploded view of the oil circuit assembly and heat exchanger.

[0019] Figure 5 This is a schematic diagram of the oil circuit assembly.

[0020] The attached diagram lists the components represented by each number as follows: 1-Heat exchange box, 2-Oil circuit assembly, 201-Vertical pipe, 201a-Pipe side sleeve, 201a-1-Heat-conducting fins, 202-Serpentine pipe, 202a-Heat-conducting fins, 3-Water-cooled box, 301-Vertical frame, 301a-Baffle plate, 302-Conical shroud, 303-Turbulence elimination shroud, 4-Water pump, 5-Air-cooled shell, 501-Constriction port, 501a-Air inlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] Please see Figures 1 to 5 This utility model is an oil-water heat exchanger for a railcar, comprising a heat exchange box 1, an oil circuit assembly 2, a water-cooled box 3, a water pump 4, and an air-cooled shell 5, forming a complete heat exchange system. By placing the oil circuit assembly 2 in the heat exchange box 1 and connecting the heat exchange box 1 with the water-cooled box 3, the water pump 4 pumps water from the water-cooled box 3 into the heat exchange box 1, allowing the water to cool the lubricating oil in the oil circuit assembly 2 in the heat exchange box 1. After heat exchange, the water flows back to the water-cooled box 3. An air-cooled shell 5 is fitted on the outside of the water-cooled box 3, with one end of the air-cooled shell 5 leading to the outside of the railcar. During the operation of the railcar, airflow enters the air-cooled shell 5 to cool the cooling water in the water-cooled box 3, enabling the cooling water to continuously exchange heat with the lubricating oil in the oil circuit assembly 2. The heat exchange box 1 is a sealed container with an oil circuit assembly 2 inside. The oil circuit assembly 2 includes two vertical pipes 201 and a serpentine pipe 202. The vertical pipes 201 pass through the top cover of the heat exchange box and are connected to the external oil circuit. The serpentine pipe 202 connects to the bottom of the two vertical pipes. The water-cooled box 3 forms a closed loop with the heat exchange box 1 through pipes; the water pump 4 delivers cooling water to the bottom of the heat exchange box 1, and the hot water after heat exchange flows back to the water-cooled box 3 from the top of the heat exchange box; the water-cooled box 3 is equipped with a vertical frame 301 inside, and the baffles 301a arranged on both sides form a meandering water flow channel to extend the residence time of the cooling water. The air-cooled shell 5 is installed outside the water-cooled box 3. It has a constriction port 501 at the front end and an opening at the end to form a ventilation channel. An air inlet 501a is set at the front end of the constriction port 501 to enhance the air intake effect by utilizing the relative wind speed when the railcar is moving.

[0023] Specifically, a cone shroud 302 is installed at the front end of the water-cooled box 3, and a turbulence elimination shroud 303 is set at the rear end to optimize airflow distribution and improve heat dissipation efficiency.

[0024] Furthermore, a pipe side sleeve 201a is installed on the outside of the vertical pipe, and multiple layers of heat-conducting fins 201a-1 are provided on the surface; heat-conducting fins 202a are fixedly installed on the outer wall of the serpentine pipe 202 along the pipe axis, effectively increasing the heat exchange area.

[0025] The operation process in this embodiment is as follows: During equipment operation, high-temperature lubricating oil enters from the top of oil circuit component 2, and exchanges heat with the cooling water in heat exchange box 1 as it flows through vertical pipe 201 and serpentine pipe 202. Simultaneously, water pump 4 continuously pumps cooling water from water-cooled box 3 into the bottom of heat exchange box 1, and the heated water returns to the top of water-cooled box 3 after absorbing heat. During the movement of the railcar, outside air enters the air-cooled shell 5 through converging port 501, flows over the outer surface of water-cooled box 3, carries away heat, and is discharged through the rear opening of water-cooled box 3. As the cooling water flows inside water-cooled box 3, it is guided by staggered baffles 301a to form turbulence, enhancing the heat dissipation effect. The entire system automatically adjusts the speed of water pump 4 according to the lubricating oil temperature. At high speeds, air cooling is the primary means of heat dissipation, while at low speeds, water circulation cooling is enhanced to ensure that the oil temperature remains within the optimal operating range. During maintenance, the air ducts and heat exchange surfaces can be cleaned through the inspection port to ensure long-term operational efficiency. This embodiment achieves efficient heat dissipation of the lubricating oil through a composite cooling method combining water and air cooling. The unique oil circuit component 2 design increases the heat exchange area, the staggered baffle 301a extends the residence time of the cooling water, and the converging port 501 structure utilizes the travel wind speed to enhance the cooling effect. The system has advantages such as high heat dissipation efficiency, strong adaptability, and convenient maintenance, and can meet the heat dissipation requirements of the railcar under various operating conditions, effectively ensuring the reliable operation of the transmission system.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An oil-water heat exchanger for a railcar, comprising a heat exchange box (1), an oil circuit assembly (2), a water-cooled box (3), a water pump (4), and an air-cooled shell (5), characterized in that: The oil circuit assembly (2) is installed inside the heat exchange box (1). The lower end of the water-cooled box (3) is connected to the inlet end of the water pump (4) through a pipe. The lower end of the heat exchange box (1) is connected to the outlet end of the water pump (4) through a pipe. The cover of the upper end of the heat exchange box (1) is connected to the cover of the upper end of the water-cooled box (3) through a pipe. The air-cooled shell (5) is fixedly sleeved on the outside of the water-cooled box (3). The air-cooled shell (5) has openings at both ends near the water-cooled box (3). One end of the air-cooled shell (5) is fixedly provided with a constriction port (501). The constriction port (501) gradually narrows towards the end away from the air-cooled shell (5). The end face of the constriction port (501) away from the air-cooled shell (5) is fixedly provided with an air inlet (501a).

2. The oil-water heat exchanger for a railcar according to claim 1, characterized in that: The water-cooled box (3) is fitted with a vertical frame (301). A set of baffles (301a) are vertically fixed on the inner side of the two sides of the vertical frame (301). The baffles (301a) on both sides are arranged alternately.

3. The oil-water heat exchanger for a railcar according to claim 2, characterized in that: The water-cooled box (3) has a cone cover (302) on the outer side of the end near the constriction port (501), and the end of the cone cover (302) facing the constriction port (501) is a pointed cone end.

4. The oil-water heat exchanger for a railcar according to claim 3, characterized in that: The water-cooled box (3) has a turbulence elimination hood (303) on its outer side away from the converging port (501), and the turbulence elimination hood (303) gradually converges at the end away from the converging port (501).

5. An oil-water heat exchanger for a railcar according to claim 1, characterized in that: The oil circuit assembly (2) includes two vertical pipes (201) and one serpentine pipe (202). The two vertical pipes (201) are respectively vertically fixed at both ends of the heat exchange box (1). The upper end of the vertical pipe (201) passes through the top cover of the heat exchange box (1) and is connected to the pipeline. The two ends of the serpentine pipe (202) are respectively fixedly connected to the lower side wall of the two vertical pipes (201).

6. An oil-water heat exchanger for a railcar according to claim 5, characterized in that: The outer wall of the vertical tube (201) is fixedly sleeved with a tube side sleeve (201a). The outer wall of the tube side sleeve (201a) is axially arrayed with several sets of heat-conducting fins (201a-1). Each set of heat-conducting fins (201a-1) is circumferentially arrayed and fixed on the outer wall of the tube side sleeve (201a).

7. An oil-water heat exchanger for a railcar according to claim 6, characterized in that: The outer wall of the serpentine tube (202) is fixedly fitted with heat-conducting fins (202a) in an array along the tube axis.

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