Liquid-cooled turbocharging device with integrated intake and exhaust and cooling system

Abstract

The utility model relates to a kind of liquid-cooled turbocharging device of air intake and exhaust and cooling system integration, including pressure shell, intermediate connecting shell, integrated scroll casing and exhaust gas bypass valve;One end of intermediate connecting shell is connected with pressure shell axially sealed by flange structure, and the other end is connected with integrated scroll casing axially sealed;Integrated scroll casing adopts double-layer chamber type structure formed by integral casting process, the inner layer of double-layer chamber type structure is exhaust gas flow channel, and the cooling liquid flow channel between inner layer and outer layer;Cooling liquid flow channel is communicated with engine cooling circulation system;Exhaust gas bypass valve is arranged at the exhaust gas outlet passage of integrated scroll casing, and the supercharging pressure of turbocharging device is controlled by pressure feedback. The utility model reduces exhaust temperature and improves engine performance;Improve product consistency, reliability and safety;Reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of diesel engine intake and exhaust systems and cooling systems, and specifically to a liquid-cooled turbocharger that integrates intake, exhaust and cooling systems. Background Technology

[0002] The turbocharger is an important component of a diesel engine. It uses the exhaust gas from the diesel engine's exhaust pipe to drive the turbine and impeller, which in turn pressurizes the air in the intake manifold, thereby improving the overall performance of the engine.

[0003] The exhaust gas from a diesel engine is at a high temperature, and the exhaust gas also generates high-speed rotation (speed exceeding 120,000 rpm) as it drives the turbine and impeller. During this process, a lot of heat is generated from contact and friction, so the turbine housing temperature of the turbocharger is very high (exceeding 300°C), and the parts have very high requirements for cooling capacity.

[0004] The shortcomings of existing technology are: 1. Compared to conventional turbochargers, the new liquid-cooled turbochargers will significantly increase the mass and size of the components, posing challenges to the layout of exhaust system components; 2. The cooling system requires a liquid-cooled turbocharger, which increases the additional load on the cooling system and necessitates an improvement in the engine's cooling capacity. Utility Model Content

[0005] This invention addresses the aforementioned problems by providing a liquid-cooled turbocharger that integrates intake, exhaust, and cooling systems. Its purpose is to reduce exhaust temperature and improve engine performance; enhance product consistency, reliability, and safety; and reduce maintenance costs.

[0006] To solve the above problems, the technical solution provided by this utility model is as follows: A liquid-cooled turbocharger integrating intake, exhaust, and cooling systems includes a pressure casing, an intermediate connecting casing, an integrated volute casing, and an exhaust bypass valve, wherein: One end of the intermediate connecting shell is axially sealed to the pressure shell via a flange structure, and the other end is axially sealed to the integrated turbine housing. The integrated turbine housing adopts a double-chamber structure formed by an integral casting process. The inner layer of the double-chamber structure is the exhaust gas passage, and the space between the inner and outer layers is the coolant passage. The coolant passage is connected to the engine cooling circulation system. The exhaust gas bypass valve is located at the exhaust gas outlet channel of the integrated turbine housing and controls the boost pressure of the turbocharger through pressure feedback.

[0007] Preferably, the inlet of the coolant flow channel is located on the side end face of the integrated turbine housing, and the outlet is located at the end of the mounting surface where the integrated turbine housing connects to the engine.

[0008] Preferably, the integrated turbine housing is made of ZAlSi7MgA alloy, which is used to improve the overall heat dissipation capacity of the turbocharger.

[0009] Preferably, the minimum effective distance between the exhaust gas passage of the inner layer of the integrated vortex housing and the outer surface of the turbocharger is not less than 13 mm.

[0010] Preferably, the effective distance from the inner edge of the exhaust gas passage to the edge of the bolt holes at the four corners of the mounting surface is not less than 9mm.

[0011] Preferably, the turbocharger is used in a non-road stage three / four mining truck diesel engine.

[0012] Preferably, the turbocharger is used in a marine power system.

[0013] Compared with the prior art, this utility model has the following advantages: 1. Because this utility model adopts an integrated liquid cooling structure, it effectively reduces the overall surface temperature of the turbocharger, thereby reducing exhaust temperature and improving engine performance.

[0014] 2. Because the vortex shell of this utility model adopts an integral casting process, there is no need for multi-layer welding, thereby improving product consistency, reliability and safety.

[0015] 3. Because the volute housing of this utility model adopts an integral casting process, it has high reliability and long service life, thereby reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a novel integrated liquid-cooled turbocharger according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the external shape of the integrated vortex shell according to a specific embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the integrated vortex shell according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the connection surface between the integrated turbocharger and the engine, which is a specific embodiment of this utility model.

[0017] The components include: 1. Pressure shell, 2. Intermediate connecting shell, 3. Integrated volute shell, 4. Exhaust gas bypass valve, 3.1. Exhaust gas flow channel, 3.2. Coolant flow channel, and 3.3. Bolt holes. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0019] This utility model application claims protection for a liquid-cooled turbocharger with integrated intake, exhaust, and cooling systems, such as... Figure 1 , 2 As shown in Figures 3 and 4, the structure includes a pressure shell 1, an intermediate connecting shell 2, an integrated vortex shell 3, and an exhaust bypass valve 4, wherein: One end of the intermediate connecting shell 2 is axially sealed to the pressure shell 1 via a flange structure, and the other end is axially sealed to the integrated turbine housing 3. The integrated turbine housing 3 adopts a double-chamber structure formed by an integral casting process. The inner layer of the double-chamber structure is the exhaust gas passage 3.1, and the coolant passage 3.2 is between the inner and outer layers. The coolant passage 3.2 is connected to the engine cooling circulation system. The exhaust gas bypass valve 4 is set at the exhaust gas outlet passage of the integrated turbine housing 3 and controls the boost pressure of the turbocharger through pressure feedback.

[0020] It should be noted that the inlet of the coolant flow channel 3.2 is located on the side end face of the integrated turbine housing 3, and the outlet is located at the end of the mounting surface where the integrated turbine housing 3 connects to the engine.

[0021] It should be further explained that when the integrated turbine housing 3 is working, the chamber structure will be filled with flowing coolant. The low-temperature coolant flows in from the inlet of the coolant flow channel 3.2 and flows out from the outlet on the mounting surface where the integrated turbine housing 3 is connected to the turbocharger, entering the engine's cooling cycle, thereby carrying away some heat and reducing the temperature of the integrated turbine housing 3 body.

[0022] It should be further noted that the integrated turbine housing 3 is made of ZAlSi7MgA alloy, which is used to improve the overall heat dissipation capacity of the turbocharger.

[0023] In this specific embodiment, the minimum effective distance from the exhaust gas passage 3.1 of the inner layer of the integrated vortex housing 3 to the outer surface of the turbocharger is not less than 13mm.

[0024] In this specific embodiment, the effective distance from the inner edge of the exhaust gas passage 3.1 to the edge of the bolt holes 3.3 at the four corners of the mounting surface is not less than 9mm.

[0025] It should be noted that the principle of this integrated turbocharger device is as follows: When the diesel engine is running, the exhaust gas passes through the integrated turbine housing 3. During the exhaust process, the exhaust gas drives the turbine-impeller structure to rotate at high speed. The heat generated by friction and the heat of the exhaust gas itself cause the temperature of the turbine housing to rise rapidly. The inner and outer layers of the turbine housing form a chamber filled with flowing low-temperature coolant. This coolant effectively removes heat from the turbine housing and cools the entire device, reducing the temperature of the exhaust gas inside the turbine housing. This achieves the effect of controlling the exhaust temperature and improving engine performance. In addition, due to the cooling effect of the coolant inside the chamber structure, the surface temperature of the entire device is lower than that of ordinary turbochargers. Therefore, it can meet the requirements for use in some extreme environments (the surface temperature during equipment operation is below 150°C), while also reducing the heat radiation of the entire system to the outside.

[0026] It should be further noted that actual measurements have shown that the surface temperature of the turbine casing of this device is 120℃-130℃, which is a significant improvement in cooling capacity compared to ordinary turbocharger devices.

[0027] It should be noted that the integrated turbocharger of this utility model is used in non-road stage three / four mining truck diesel engines.

[0028] It should be noted that the integrated turbocharger of this utility model is used in marine power systems.

[0029] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0030] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0031] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A liquid-cooled turbocharger integrating intake, exhaust, and cooling systems, characterized in that: It includes a pressure shell (1), an intermediate connecting shell (2), an integrated vortex shell (3), and an exhaust bypass valve (4), wherein: One end of the intermediate connecting shell (2) is axially sealed to the pressure shell (1) through a flange structure, and the other end is axially sealed to the integrated vortex shell (3); the integrated vortex shell (3) adopts a double-chamber structure formed by an integral casting process. The inner layer of the double-chamber structure is the exhaust gas passage (3.1), and the coolant passage (3.2) is between the inner and outer layers; the coolant passage (3.2) is connected to the engine cooling circulation system; the exhaust gas bypass valve (4) is set at the exhaust gas outlet passage of the integrated vortex shell (3) and controls the boost pressure of the turbocharger through pressure feedback.

2. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 1, characterized in that: The inlet of the coolant flow channel (3.2) is located on the side end face of the integrated volute (3), and the outlet is located at the end of the mounting surface where the integrated volute (3) is connected to the engine.

3. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 2, characterized in that: The integrated vortex housing (3) is made of ZAlSi7MgA alloy, which is used to improve the overall heat dissipation capacity of the turbocharger.

4. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 3, characterized in that: The minimum effective distance from the exhaust gas passage (3.1) of the inner layer of the integrated vortex housing (3) to the outer surface of the turbocharger is not less than 13 mm.

5. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 4, characterized in that: The effective distance from the inner edge of the exhaust gas passage (3.1) to the edge of the bolt hole (3.3) at the four corners of the mounting surface is not less than 9mm.

6. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 5, characterized in that: The turbocharger is used in off-road stage three / four mining truck diesel engines.

7. The liquid-cooled turbocharger integrating intake, exhaust, and cooling systems according to claim 5, characterized in that: The turbocharger is used in the ship's power system.

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