Corrosion-resistant water-air intercooler of marine diesel engine

Abstract

The corrosion-resistant water-air intercooler comprises a cooling core assembly, the cooling core assembly is composed of heat exchange tubes, fins and tube plates, side plates, an air inlet chamber, a water chamber end cover, an air outlet chamber and a water inlet and outlet end cover are arranged on the periphery of the cooling core assembly respectively, the fins of the cooling core assembly are formed by punching corrosion-resistant aluminum foil with the thickness of 0.11-0.13 mm, and the fins of the cooling core assembly are made of aluminum foil with the thickness of 0.11-0.13 mm. The base material of the corrosion-resistant aluminum foil fin is plain aluminum foil, the mark is 1100, 1200 or 8011, the surface of the corrosion-resistant aluminum foil fin is coated with an organic hydrophilic corrosion-resistant coating, the coating can improve the corrosion resistance of the cooling fin, the aluminum foil is prevented from being corroded, meanwhile, water in hot air can be rapidly dispersed on the fin and flow downwards along the fin, condensate water is prevented from forming a water bridge between the fins, and the service life of the cooling fin is prolonged. Therefore, the heat exchange efficiency can be improved. The water-air intercooler with the copper fins overcomes the problems that a traditional water-air intercooler with the copper fins cannot be suitable for working in the marine environment and is short in service life, and meanwhile the heat exchange performance can be achieved.

Description

Technical Field

[0001] The utility model relates to a corrosion-resistant water-to-air intercooler for a marine diesel engine, belonging to the technical field of water-to-air intercoolers for marine diesel engines. Background Art

[0002] At present, the cooling fins of the traditional marine diesel engine water-to-air intercooler are made of T2 copper sheets. However, in the marine environment, the copper fins will corrode quickly, causing the service life of the intercooler to be sharply shortened. The service life of the intercooler made of copper fins is less than three months. Due to the poor corrosion resistance of the copper fins, the corroded copper fins during use will block the intercooler, causing increased intake resistance and insufficient diesel engine power. In addition, the broken residues are likely to enter the cylinder, causing wear of the piston and cylinder liner, and even cylinder scuffing in severe cases.

[0003] To avoid fin corrosion, the general method is to change the fin material to stainless steel or zinc-nickel copper, but these materials will significantly reduce the heat dissipation efficiency of the intercooler and cannot meet the performance requirements of the diesel engine. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to make a water-to-air intercooler of a marine diesel engine adapt to the marine environment and have a higher heat dissipation efficiency.

[0005] In order to solve the above technical problems, the utility model provides a corrosion-resistant water-to-air intercooler for a marine diesel engine, which can improve the corrosion resistance and service life of the water-to-air intercooler while taking into account the heat exchange performance.

[0006] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0007] A corrosion-resistant water-to-air intercooler for a marine diesel engine, comprising a cooling core assembly, wherein the cooling core assembly is provided with side plates, an air inlet chamber, a water chamber end cover, an air outlet chamber and water inlet and outlet end covers on the periphery thereof;

[0008] The cooling core assembly includes a heat exchange tube, a fin and a tube plate. The fin is a corrosion-resistant aluminum foil, and a plurality of heat exchange holes are opened through the fin.

[0009] Preferably, the fins are provided with an organic hydrophilic corrosion-resistant coating.

[0010] Preferably, the fin thickness is between 0.11 and 0.13 mm.

[0011] Preferably, a flange is provided at the opening of the heat exchange hole.

[0012] Preferably, the fin substrate is plain aluminum foil with a grade of 1100, 1200 or 8011.

[0013] The utility model provides a corrosion-resistant water-to-air intercooler for a marine diesel engine, which has the following advantages:

[0014] 1. When the utility model is used, the fins of the cooling core of the water-to-air intercooler are made of organic hydrophilic corrosion-resistant aluminum foil material, which greatly improves the corrosion resistance and service life of the water-to-air intercooler, reduces the user's use cost, and also takes into account the heat exchange performance.

[0015] 2. When the utility model is used, an organic hydrophilic corrosion-resistant coating is provided on the surface of the fin, which can improve the corrosion resistance of the heat sink and prevent the aluminum foil from being corroded. At the same time, the moisture in the hot air can be quickly dispersed on the fin and flow down along the fin, preventing condensed water from forming a water bridge between the fins, which helps to improve the heat exchange efficiency.

[0016] 3. When the utility model is used, the heat exchange holes of the fins are flanged to increase the contact area with the heat exchange tubes and improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a corrosion-resistant water-to-air intercooler for a marine diesel engine according to the utility model;

[0018] Figure 2 This is a structural schematic diagram of the utility model mainly embodying the fin structure;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross section in the AA direction;

[0020] In the figure:

[0021] 1-cooling core assembly; 2-side panel; 3-air inlet chamber; 4-water chamber end cover; 5-air outlet chamber; 6-water inlet and outlet end covers; 7-fins; 8-heat exchange holes; 81-flange. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0023] Reference Figure 1 and Figure 2A corrosion-resistant water-to-air intercooler for a marine diesel engine includes a cooling core assembly 1. Side plates 2, an air inlet chamber 3, a water chamber end cover 4, an air outlet chamber 5 and water inlet and outlet end covers 6 are fixedly installed on the outer wall of the cooling core assembly 1 by bolts. The cooling core assembly 1 includes heat exchange tubes, fins 7 and tube sheets, which are all prior arts and will not be described in detail. The fins 7 are preferably corrosion-resistant aluminum foils with a thickness of 0.11 to 0.13 mm. A plurality of heat exchange holes 8 are opened through the fins 7. The heat exchange holes 8 are used to pass the heat exchange tubes and can increase the heat dissipation efficiency of the fins 7.

[0024] In a further embodiment, the corrosion-resistant aluminum foil fin 7 substrate is preferably plain aluminum foil with a grade of 1100, 1200 or 8011, and the surface of the fin 7 is coated with a layer of organic hydrophilic corrosion-resistant coating (not shown in the figure), which can improve the corrosion resistance of the heat sink and prevent the aluminum foil from being corroded. At the same time, it allows the moisture in the hot air to quickly disperse on the fin 7 and flow down along the fin 7, preventing condensed water from forming a water bridge between the fins 7, which helps to improve the heat exchange efficiency.

[0025] Reference Figure 2 and Figure 3 In a further embodiment, the opening of the heat exchange hole 8 on the fin 7 is processed by flanging 81, which can increase the contact area between the fin 7 and the heat exchange tube and improve the heat exchange efficiency.

[0026] The performance of the corrosion-resistant water-to-air intercooler for marine diesel engines of the utility model is as follows:

[0027] The fins 7 in the utility model have strong anti-corrosion performance, can fully adapt to the marine environment, and greatly improve the service life. The results of the 250-hour salt spray test show that the traditional copper fins 7 have been seriously corroded, while the organic corrosion-resistant coating aluminum foil fins 7 have no corrosion phenomenon; at the same time, the organic corrosion-resistant coating aluminum foil fins 7 in the utility model have a heat transfer coefficient of 13 times that of stainless steel and 6 times that of zinc white copper through test comparison, which can improve the corrosion resistance and service life of the water-to-air intercooler while taking into account the heat exchange performance.

[0028] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A corrosion-resistant water-to-air intercooler for a marine diesel engine, characterized in that: It comprises a cooling core assembly (1), wherein the cooling core assembly (1) is provided with side plates (2), an air inlet chamber (3), a water chamber end cover (4), an air outlet chamber (5) and water inlet and outlet end covers (6) on the periphery thereof; The cooling core assembly (1) comprises a heat exchange tube, a fin (7) and a tube plate. The fin (7) is a corrosion-resistant aluminum foil. A plurality of heat exchange holes (8) are provided through the fin (7).

2. A corrosion-resistant water-to-air intercooler for a marine diesel engine as claimed in claim 1, characterized in that: The fins (7) are provided with an organic hydrophilic corrosion-resistant coating.

3. The corrosion-resistant water-to-air intercooler for a marine diesel engine according to claim 1, characterized in that: The thickness of the fin (7) is between 0.11 and 0.13 mm.

4. The corrosion-resistant water-to-air intercooler for a marine diesel engine according to claim 1, characterized in that: The opening of the heat exchange hole (8) is provided with a flange (81).

5. The corrosion-resistant water-to-air intercooler for a marine diesel engine according to claim 1, characterized in that: The fin (7) substrate is plain aluminum foil, with a grade of 1100, 1200 or 8011.

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