An oil-liquid heat exchanger

Abstract

This utility model belongs to the technical field of liquid heat exchange equipment, specifically an oil heat exchanger. It includes a heat exchange shell with an oil inlet and an oil outlet at both ends. The heat exchange shell is equipped with several heat exchange tubes, and adjacent heat exchange tubes are connected by water passage chambers to form water flow channels. The heat exchange shell also has a water inlet and an outlet port. Several flow guide baffles are distributed within the inner cavity of the heat exchange shell. Each flow guide baffle has a water passage window on one side and an assembly through-hole for the heat exchange tubes to pass through. A certain turbulence gap exists between the assembly through-hole and the corresponding heat exchange tube. This utility model rationally designs the fitting structure between the heat exchange tubes and the flow guide baffles, allowing some oil to pass through by utilizing the turbulence gap. This disrupts the fixed path flow of the oil within the heat exchange shell, eliminates dead zones in heat exchange, and effectively improves the heat exchange rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of liquid heat exchange equipment, and specifically refers to an oil heat exchanger. Background Technology

[0002] Oil heat exchangers are key components widely used in hydraulic and lubrication systems. Their function is to control the working temperature of the oil within a reasonable range by exchanging heat with the cooling medium (usually water), thus ensuring the stable and reliable operation of the system.

[0003] Currently, common oil exchangers typically include a heat exchange shell containing multiple heat exchange tubes for the flow of cooling medium. Oil flows within the shell, and the cooling medium exchanges heat with the oil through the tube walls. To extend the oil's flow path within the shell, thereby increasing heat exchange time and improving heat exchange efficiency, conventional techniques in this field involve installing baffles within the heat exchange shell to rationally plan the oil's flow path within the shell's interior.

[0004] However, because the oil is strictly confined to a single, fixed flow path set by the baffle, dead zones or low-speed zones of oil flow are easily formed in certain areas of the heat exchange shell, especially the corners of the chamber, areas far from the main flow channel, and the back of the baffle. The oil in these dead zones can only flow slowly or even stagnate for a long time, and cannot fully exchange heat with the heat exchange tubes. Summary of the Invention

[0005] The purpose of this invention is to provide an oil heat exchanger with a rationally designed structure for the heat exchange tube and the flow guide baffle. By using the turbulence gap, some oil can pass through, thereby disrupting the fixed path flow of the oil in the heat exchange shell, eliminating dead zones in heat exchange, and effectively improving the heat exchange rate.

[0006] This utility model is implemented as follows: An oil heat exchanger includes a heat exchange shell with an oil inlet port and an oil outlet port at both ends, communicating with the shell's internal cavity. Several heat exchange tubes are arranged axially within the heat exchange shell. The ends of adjacent heat exchange tubes are connected through a water passage chamber that is not connected to the shell's internal cavity, forming a serpentine water flow channel. The heat exchange shell has an inlet port and an outlet port, respectively communicating with the beginning and end of the water flow channel. Several flow guide baffles are evenly spaced axially along the internal cavity of the heat exchange shell between the inlet and outlet ports. These baffles separate the internal cavity of the heat exchange shell. Each baffle has a water passage window on one side, with the water passage windows of adjacent baffles staggered vertically. Each baffle has an assembly through-hole for the heat exchange tubes to pass through, with a certain turbulence gap between the assembly through-hole and the corresponding heat exchange tube.

[0007] In the aforementioned oil heat exchanger, the total area of ​​the turbulence gaps on the same flow guide baffle is 5%-15% of the water passage window area.

[0008] In the aforementioned oil heat exchanger, both the oil inlet port and the oil outlet port are located on the water passage window side, away from their adjacent guide baffles.

[0009] In the aforementioned oil heat exchanger, the heat exchange shell includes a horizontally arranged heat exchange cylinder and support end caps covering both ends of the heat exchange cylinder. The two ends of the heat exchange tube pass through the two support end caps respectively. A water passage cover is provided on the outer wall of the support end cap, and the water passage cover and the corresponding support end cap form the water passage chamber.

[0010] In the aforementioned oil heat exchanger, the outer ring of the flow guide baffle extends along its axial direction to form a fixed ring body. The outer wall surface of the fixed ring body is attached to the inner wall surface of the heat exchange cylinder, and the fixed ring body and the heat exchange cylinder are fixed by heat fusion welding.

[0011] The outstanding advantages of this utility model compared to the prior art are: This utility model rationally designs the matching structure of the heat exchange tube and the flow guide baffle. Not only does it allow the oil to flow in a serpentine manner within the heat exchange shell through the staggered distribution of water windows in multiple flow guide baffles, resulting in a longer heat exchange flow path, but it also allows some oil to pass through the turbulence gaps, thereby disrupting the fixed path flow of the oil within the heat exchange shell, eliminating heat exchange dead zones, and effectively improving the heat exchange rate. Attached Figure Description

[0012] Figure 1 This is an overall sectional view of the present invention; Figure 2 This is a diagram showing the assembly state of the heat exchange tube and the flow guide baffle of this utility model; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0013] In the diagram: 1. Oil inlet port; 2. Oil outlet port; 3. Heat exchange tube; 4. Water chamber; 5. Water inlet port; 6. Water outlet port; 7. Flow guide baffle; 8. Water window; 9. Turbulence gap; 10. Heat exchange cylinder; 11. Support end cover; 12. Water cover; 13. Fixing ring. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —3: An oil heat exchanger includes a heat exchange shell. At both ends of the heat exchange shell are an oil inlet port 1 and an oil outlet port 2, respectively communicating with its inner cavity. Several heat exchange tubes 3 are arranged axially inside the heat exchange shell. The ends of adjacent heat exchange tubes 3 are connected through a water passage chamber 4, which is not connected to the inner cavity of the heat exchange shell, forming a serpentine water flow channel. The heat exchange shell has an inlet port 5 and an outlet port 6, respectively communicating with the beginning and end of the water flow channel. Several flow guide baffles 7 are evenly distributed axially on the inner cavity of the heat exchange shell between the oil inlet port 1 and the oil outlet port 2. These flow guide baffles 7 separate the inner cavity of the heat exchange shell from left to right. Each flow guide baffle 7 has a water passage window 8 on one side, and the water passage windows 8 of adjacent flow guide baffles 7 are staggered vertically. Each flow guide baffle 7 has an assembly through hole for the heat exchange tubes 3 to pass through and fit into. A certain turbulence gap 9 exists between the assembly through hole and the corresponding heat exchange tube 3.

[0015] This utility model rationally designs the cooperation structure between the heat exchange tube 3 and the flow guide baffle 7. Not only does the water passage window 8 of multiple flow guide baffles 7 be staggered vertically to allow the oil to flow in a serpentine manner within the heat exchange shell, providing a longer heat exchange flow path, but it also utilizes the turbulence gap 9 to allow some oil to pass through, thereby disrupting the fixed path flow of the oil within the heat exchange shell, eliminating heat exchange dead zones, and effectively improving the heat exchange rate.

[0016] Furthermore, in order to avoid the turbulence gap 9 being too large and affecting the fixed path flow of oil in the heat exchange shell, the total area of ​​the turbulence gap 9 on the same flow guide baffle 7 is 5%-15% of the area of ​​the water passage window 8.

[0017] Meanwhile, in order to maximize the contact between the oil flow path and the heat exchange tube 3, both the oil inlet port 1 and the oil outlet port 2 are located on the side of the water passage window 8, away from their adjacent guide baffle 7.

[0018] In this embodiment, the specific structure of the heat exchange shell is as follows: the heat exchange shell includes a horizontally arranged heat exchange cylinder 10 and support end caps 11 covering both ends of the heat exchange cylinder 10. The two ends of the heat exchange tube 3 pass through the two support end caps 11 respectively. A water passage cover 12 is provided on the outer wall of the support end cap 11, and a water passage chamber 4 is formed between the water passage cover 12 and the corresponding support end cap 11. Furthermore, in order to fix the flow guide baffle 7 inside the heat exchange cylinder 10, a fixing ring 13 is formed on the outer ring of the flow guide baffle 7 along its axial direction. The outer wall surface of the fixing ring 13 is attached to the inner wall surface of the heat exchange cylinder 10, and the fixing ring 13 is fixed to the heat exchange cylinder 10 by heat fusion welding.

[0019] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An oil heat exchanger, comprising a heat exchange shell, with an oil inlet port (1) and an oil outlet port (2) respectively communicating with the inner cavity of the heat exchange shell at both ends, and a plurality of heat exchange tubes (3) arranged axially inside the heat exchange shell, the ends of adjacent heat exchange tubes (3) being connected through a water passage chamber (4) not communicating with the inner cavity of the heat exchange shell to form a serpentine water flow channel, and the heat exchange shell having an inlet port (5) and an outlet port (6) respectively communicating with the beginning and end of the water flow channel, characterized in that: Several flow guide baffles (7) are evenly distributed along the axial direction on the inner cavity of the heat exchange shell located between the oil inlet port (1) and the oil outlet port (2). The flow guide baffles (7) separate the inner cavity of the heat exchange shell from left to right. Each flow guide baffle (7) has a water passage window (8) on one side, and the water passage windows (8) of two adjacent flow guide baffles (7) are staggered vertically. Each flow guide baffle (7) has an assembly through hole for the heat exchange tube (3) to pass through and fit. There is a certain turbulence gap (9) between the assembly through hole and the corresponding heat exchange tube (3).

2. The oil heat exchanger according to claim 1, characterized in that: The total area of ​​the turbulence gaps (9) on the same flow guide baffle (7) is 5%-15% of the area of ​​the water passage window (8).

3. The oil heat exchanger according to claim 1, characterized in that: Both the oil inlet port (1) and the oil outlet port (2) are located on the side of the water passage window (8) away from their adjacent guide baffle (7).

4. The oil heat exchanger according to claim 1, characterized in that: The heat exchange shell includes a horizontally arranged heat exchange cylinder (10) and support end caps (11) covering the two ends of the heat exchange cylinder (10). The two ends of the heat exchange tube (3) pass through the two support end caps (11) respectively. A water passage cover (12) is provided on the outer wall of the support end cap (11). The water passage cover (12) and the corresponding support end cap (11) form the water passage chamber (4).

5. An oil heat exchanger according to claim 4, characterized in that: The outer ring of the flow guide baffle (7) extends along its axial direction to form a fixed ring (13). The outer wall of the fixed ring (13) is attached to the inner wall of the heat exchange cylinder (10), and the fixed ring (13) and the heat exchange cylinder (10) are fixed by hot-melt welding.

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