Integrated heat shield for V-type marine diesel engine

Abstract

The utility model discloses a kind of V-type marine diesel engine integrated heat shield, including supercharger heat shield, first support is connected in the upper end of supercharger heat shield, for being fixed on the exhaust side flange of supercharger;Pulse converter heat shield is connected in the lower end of supercharger heat shield;Exhaust elbow heat shield is symmetrically connected in the both ends of pulse converter heat shield, second support is respectively fixed in the inboard of exhaust elbow heat shield, for providing support for exhaust elbow heat shield;Exhaust pipe heat shield is respectively connected in the lower end of exhaust elbow heat shield one side, two exhaust pipe heat shields are symmetrically arranged, two third supports are respectively connected in the exhaust pipe heat shield.Instructive effect is: simple structure, processing is convenient, the V-type marine diesel engine integrated heat shield of low cost, exhaust system components using heat insulation wrapping can be further heat-insulated, effectively reduce the surface temperature of exhaust system components to 200 ℃ below, satisfy marine diesel engine use requirement.

Description

Technical Field

[0001] This utility model relates to a heat insulation cover, and more particularly to an integrated heat insulation cover for a V-shaped marine diesel engine. Background Technology

[0002] Diesel engines have high combustion temperatures, and the surface temperature of their exhaust system (including exhaust pipes, exhaust bends, turbocharger turbine housings, etc.) can reach 600-700℃. In marine and lake environments, marine diesel engines need to have their overall surface temperature controlled below 200℃ to prevent diesel fuel (ignition point 220℃) leakage from causing a fire on the ship, while also ensuring that the temperature of the ship's engine room does not become too high. Therefore, heat insulation treatment is required for the high-temperature exhaust system. Currently, there are two main types of heat insulation treatment:

[0003] 1. The exhaust system is designed with a separate cooling water jacket. This means that a cooling water jacket with cooling water channels is installed outside the high-temperature components such as the exhaust pipe. An air layer separates the water jacket from the high-temperature components, and cooling water circulates within the water jacket for cooling. Because separate cooling water jackets are required for the exhaust pipe, exhaust bend, turbocharger, etc., to cover the outside of the high-temperature components for cooling, the design is very complex and requires dedicated equipment. Furthermore, the cooling water jackets are machined using a casting machine, requiring separate molds, resulting in high manufacturing costs and difficulty in modification; and there is also a risk of leakage.

[0004] 2. Use thermal insulation materials to wrap high-temperature components. Thermal insulation materials can reduce surface temperature and engine compartment temperature to some extent, but reducing the surface temperature below 200℃ is too costly and impractical. Furthermore, due to the thickness of the insulation layer, it cannot cover flange connections. Covering flange connections would cause interference between the insulation layer and the flange bolts, making exhaust system bolt installation difficult. Developing an integrated thermal insulation wrapping system presents problems such as high cost, difficulty in standardization, and inability to disassemble. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a V-shaped integrated heat shield for marine diesel engines that is simple in structure, easy to process, and low in cost. It can further insulate the exhaust system components that are covered with heat insulation wrapping, effectively reducing the surface temperature of the exhaust system components to below 200°C, thus meeting the requirements for use of marine diesel engines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A V-type marine diesel engine integrated heat shield includes a turbocharger heat shield. The upper end of the turbocharger heat shield is connected to a first bracket for fixing to the exhaust side flange of the turbocharger, thereby supporting the turbocharger heat shield on the outside of the turbocharger.

[0008] A pulse converter heat insulation plate is connected to the lower end of the turbocharger heat insulation cover to insulate the heat of the pulse converter;

[0009] A heat shield for exhaust bend pipes is symmetrically connected to both ends of the heat shield for pulse converter. A second bracket is fixed inside the heat shield for exhaust bend pipes to provide support for the heat shield for exhaust bend pipes.

[0010] Exhaust pipe heat shields are connected to one side of the lower end of the exhaust pipe heat shield. The two exhaust pipe heat shields are arranged symmetrically. Two third brackets are connected inside the exhaust pipe heat shields to provide support for fixing them to the diesel engine body.

[0011] A further improvement of the present invention is that the second bracket includes a top bracket and a bottom bracket arranged vertically, both of which are Z-shaped, so as to be fixed on the diesel engine body and the transmission box cover respectively, ensuring installation strength and rigidity.

[0012] A further improvement of this utility model is that: the lower end of the heat insulation cover of the exhaust pipe overlaps with the heat insulation cover of the adjacent exhaust pipe and is connected by bolts to facilitate a stable connection.

[0013] A further improvement of this utility model is that the first bracket is L-shaped and the lower end is an inwardly concave arc.

[0014] A further improvement of the present invention is that the third bracket is a four-segment zigzag shape formed by pressing slats, with three segments attached to the three plates inside the exhaust pipe heat insulation cover.

[0015] A further improvement of this utility model is that two adjacent components are connected by bolts to facilitate disassembly and assembly.

[0016] The beneficial effects of this utility model are:

[0017] 1. This heat shield can further insulate exhaust system components such as exhaust pipes, exhaust bends, pulse converters, and turbochargers, effectively reducing the surface temperature of exhaust system components to below 200°C, meeting the requirements for marine diesel engines. Since this heat shield can fully cover the high-temperature surfaces of the exhaust system, there is no need to cover flanges and other connections when performing heat insulation wrapping before installing the heat shield. Simply heat-insulate the exhaust components separately and then install the heat shield to meet the surface temperature requirements.

[0018] 2. The heat shield is made by stamping, which has a simple structure and is easy to process. No mold is required. It can be bent with a regular bending machine, which is fast and low-cost. It is easy to adjust the structure to adapt to new engine models. There is no need to use cooling water to cool high-temperature components, the thermal stress gradient is small, and there is no risk of water leakage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is the three-dimensional structure of the present invention. Figure I .

[0021] Figure 3 This is the three-dimensional structure of the present invention. Figure II .

[0022] Figure 4 This is an installation diagram of this utility model.

[0023] Figure 5 yes Figure 4 Top view.

[0024] In the diagram: 1. Heat shield for left exhaust pipe; 2. Heat shield for left exhaust bend pipe; 3. Heat shield for pulse converter; 4. Heat shield for turbocharger; 5. Heat shield for right exhaust bend pipe; 6. Heat shield for right exhaust pipe; 7. Third bracket; 8. Bottom bracket; 9. Top bracket; 10. First bracket. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] like Figures 1-3 As shown, this utility model relates to an integrated heat shield for a V-type marine diesel engine, including a turbocharger heat shield 4. The turbocharger heat shield 4 is arc-shaped with two mutually perpendicular planes at both ends. A first bracket 10 is connected to the lower plane of the upper end of the turbocharger heat shield 4 by four bolts. The first bracket 10 is L-shaped with an inwardly concave arc at the lower end and is used to fix it to the exhaust side flange of the turbocharger, thereby supporting the turbocharger heat shield 4 on the outside of the turbocharger.

[0027] A pulse converter heat insulation plate 3 is bolted to the lower end of the turbocharger heat insulation cover 4. The pulse converter heat insulation plate 3 is a rectangular flat plate used to insulate the heat of the pulse converter.

[0028] Two exhaust bend heat shields, namely the left exhaust bend heat shield 2 and the right exhaust bend heat shield 5, are symmetrically connected to both ends of the pulse converter heat insulation plate 3 by bolts. A second bracket is fixed inside each of the two exhaust bend heat shields to provide support for them. The main body of the exhaust bend heat shield is an angle iron shape made of sheet metal, with the upper end bent and welded into a plane.

[0029] The second bracket includes a top bracket 9 and a bottom bracket 8 arranged vertically. Both the top bracket 9 and the bottom bracket 8 are Z-shaped and one end is fixed to the inside of the corresponding exhaust bend heat shield by bolts, so as to fix them to the engine body and transmission box cover of the diesel engine respectively, ensuring installation strength and rigidity.

[0030] Exhaust pipe heat shields are connected to one side of the lower end of the two exhaust pipe heat shields, namely the left exhaust pipe heat shield 1 and the right exhaust pipe heat shield 6, and are arranged symmetrically. The cross-section of each exhaust pipe heat shield is an inclined trapezoidal groove with a ridge-shaped bottom on the outer side. Two third brackets 7 are connected inside the two exhaust pipe heat shields to provide support for fixing them to the diesel engine block. The lower side plate of the exhaust pipe heat shield overlaps with the adjacent exhaust pipe heat shield plate and is connected by bolts for a secure connection.

[0031] The third bracket 7 is a four-segment zigzag shape made of pressed strips, with three segments attached to the three plates inside the exhaust pipe heat insulation cover, and the upper ends of the brackets being fixed to the exhaust pipe heat insulation cover by bolts.

[0032] During installation, if Figure 4 and Figure 5 As shown, the steps are as follows:

[0033] 1. After heat insulation wrapping of the diesel engine exhaust pipe, exhaust bend, pulse converter, turbocharger, etc., the third bracket 7 is fixed to the screw hole on the side of the diesel engine body, the bottom bracket 8 and the top bracket 9 are fixed to the diesel engine body and the transmission box cover respectively, and the lower end of the first bracket 10 is fixed to the exhaust side flange of the turbocharger with bolts to provide a reference for the installation of the heat insulation cover.

[0034] 2. Then install two exhaust pipe heat insulation covers on the third bracket 7 respectively; fix the two exhaust bend heat insulation covers to the bottom bracket 8 and the top bracket 9 with bolts, and connect them to the corresponding exhaust pipe heat insulation covers with two bolts respectively; to achieve integrated heat insulation of exhaust pipe and exhaust bend.

[0035] 3. Then connect the heat insulation plate 3 of the pulse converter to the heat insulation cover of the two exhaust bend pipes with four bolts. This will prevent the heat insulation cover of the exhaust bend pipes from shaking and also isolate the heat of the pulse converter.

[0036] 4. Finally, fix the lower end of the turbocharger heat shield 4 to the pulse converter heat shield 3, and the upper end to the first bracket 10. This achieves full coverage of the high-temperature components, preventing spontaneous combustion of oil upon contact with high-temperature surfaces.

[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A V-type integrated heat shield for marine diesel engines, characterized in that: Includes a turbocharger heat shield, with a first bracket connected to the upper end of the turbocharger heat shield for fixing to the exhaust side flange of the turbocharger, thereby supporting the turbocharger heat shield on the outside of the turbocharger. A pulse converter heat insulation plate is connected to the lower end of the turbocharger heat insulation cover to insulate the heat of the pulse converter; A heat shield for exhaust bend pipes is symmetrically connected to both ends of the heat shield for pulse converter. A second bracket is fixed inside the heat shield for exhaust bend pipes to provide support for the heat shield for exhaust bend pipes. Exhaust pipe heat shields are connected to one side of the lower end of the exhaust pipe heat shield. The two exhaust pipe heat shields are arranged symmetrically. Two third brackets are connected inside the exhaust pipe heat shields to provide support for fixing them to the diesel engine body.

2. The integrated heat shield for a V-type marine diesel engine according to claim 1, characterized in that: The second bracket includes a top bracket and a bottom bracket arranged vertically, both of which are Z-shaped so as to be fixed to the diesel engine body and the transmission box cover respectively.

3. The integrated heat shield for a V-type marine diesel engine according to claim 1, characterized in that: The lower side panel of the exhaust pipe heat insulation cover overlaps with the adjacent exhaust pipe heat insulation cover to ensure a secure connection.

4. The integrated heat shield for a V-type marine diesel engine according to claim 1, characterized in that: The first bracket is L-shaped with an inwardly concave arc at the lower end.

5. The integrated heat shield for a V-type marine diesel engine according to claim 1, characterized in that: The third bracket is a four-segment zigzag shape made of pressed slats, with three segments attached to the three plates inside the exhaust pipe heat insulation cover.

6. A V-type marine diesel engine integrated heat shield according to any one of claims 1-5, characterized in that: Adjacent components are connected by bolts to facilitate disassembly and assembly.

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