Heat distortion resistant turbocharger housing

Abstract

The utility model discloses a kind of turbocharger shell of thermal deformation resistance, belong to internal combustion engine supercharging technical field.To solve the problem that existing shell is prone to thermal deformation due to unreasonable support point, low efficiency, its technical scheme is: on the turbine double-shell connecting flow channel outer wall of connecting turbine shell and compressor shell, integrally formed and set an installation boss, the installation boss is formed rigid connection fulcrum with engine cylinder by fixed screw rod.The beneficial effects of the utility model are that the structure moves the support point to the middle of the shell, greatly enhances the overall rigidity, can effectively resist and inhibit the thermal deformation of turbine shell under high temperature working condition, ensures the stability of the precise gap between impeller and shell, thereby significantly improves the working efficiency, operation reliability and anti-vibration ability of turbocharger, and effectively prolongs its service life.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine turbocharging technology, and in particular to a turbocharger housing resistant to thermal deformation. Background Technology

[0002] Turbochargers, as key components that can significantly improve the power performance and combustion efficiency of internal combustion engines, have been widely used in the automotive and construction machinery industries. Their basic principle is to use the high-temperature, high-pressure exhaust gas from the engine to drive a turbine, which in turn drives a compressor impeller to rotate at high speed via a coaxial connecting rod. This compresses fresh air before sending it into the engine cylinders, achieving greater power output.

[0003] During the operation of a turbocharger, its turbine end, especially the turbine housing which directly receives and guides the exhaust gas, is subjected to the high-temperature combustion gases from the engine, reaching hundreds of degrees Celsius, for extended periods. Meanwhile, the compressor housing at the other end remains in a relatively normal temperature environment. This large and uneven temperature gradient across the entire turbocharger assembly makes the thermal expansion and contraction effects of the materials particularly pronounced. Specifically, compared to the compressor housing, the turbine housing inevitably undergoes significant thermal expansion due to continuous heating, a phenomenon known as "thermal deformation."

[0004] This thermal deformation poses a direct challenge to the performance and reliability of turbochargers. First, to ensure operating efficiency, an extremely precise operating clearance must be maintained between the high-speed rotating impeller and the inner wall of the casing. Thermal deformation can cause unpredictable changes in this clearance. If the clearance increases due to deformation, some high-pressure gas will leak from the blade tips, resulting in a significant decrease in boost efficiency; if the clearance decreases due to uneven deformation, it is highly likely that the impeller blades will scrape or even collide with the inner wall of the casing, causing catastrophic damage.

[0005] In existing technologies, turbochargers are typically fixed directly to the engine's exhaust manifold via flanges on their turbine housings, while components such as the compressor housing and intermediate parts are suspended behind the turbine housing. This traditional mounting method means that the support point of the entire turbocharger assembly is located precisely on the turbine housing, where the temperature is highest and deformation is most severe. When the turbine housing expands due to heat, because it is itself a fixed point, the entire structure lacks a stable, independent external constraint to effectively resist deformation. Although the problem can be partially alleviated by using more heat-resistant materials, this method is costly and cannot fundamentally eliminate the deformation risk caused by the structural layout.

[0006] Therefore, this utility model proposes a turbocharger housing resistant to thermal deformation to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problem that in the prior art, the turbocharger housing is usually located in the high-temperature turbine housing part, which leads to poor stability of the overall structure under high-temperature conditions and easy thermal deformation, thus affecting working efficiency and operational reliability, the present invention aims to provide a turbocharger housing with an improved structure that can effectively solve the above problems and resist thermal deformation.

[0008] This utility model provides a turbocharger housing resistant to thermal deformation, comprising: a turbine housing and a compressor housing; a turbine double housing connecting channel and a mounting boss.

[0009] The mounting boss is a solid block structure integrally formed on the outer wall of the turbine double-shell connecting flow channel.

[0010] Furthermore, the turbine double-shell connecting channel is integrally connected between the turbine housing and the compressor housing, and the mounting boss is constructed to cooperate with a fixing screw to serve as the core support point for fixing the entire turbocharger housing to the external engine block.

[0011] Preferably, the housing further includes a turbine exhaust gas guide pipe, one end of which is connected to the exhaust gas intake channel of the turbine housing, and the other end is provided with a flange for connection and fixation.

[0012] Preferably, the flange has a plurality of mounting holes for the connecting bolts to pass through.

[0013] Preferably, one or more turbine guide ports are provided inside the turbine housing along the tangential direction of its cavity, and the turbine guide ports are connected to the exhaust gas intake passage.

[0014] Preferably, an exhaust gas intake transition ring is also provided between the turbine exhaust gas guide pipe and the exhaust gas intake passage.

[0015] Preferably, an exhaust gas outlet transition ring is connected to the port of the exhaust gas outlet passage of the turbine housing.

[0016] Preferably, a compressor outlet guide pipe is connected to the compressor outlet of the compressor housing.

[0017] Preferably, the mounting boss has a through hole through which the fixing screw passes.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, an integrated mounting boss is provided on the intermediate flow channel connecting the turbine housing and the compressor housing, which serves as a fixed fulcrum to the engine block, forming an extremely stable support structure. This structure can effectively resist and suppress the thermal expansion and deformation of the turbine housing at high temperatures, ensuring the stability of the overall turbocharger structure.

[0020] 2. In this invention, by effectively suppressing the thermal deformation of the casing, the precise gap between the high-speed rotating impeller and the casing is maintained within the optimal design range. This avoids air leakage and efficiency reduction caused by excessive gap, and also prevents scraping between the impeller and the casing that may be caused by excessive gap, thereby significantly improving the working efficiency and operational reliability of the turbocharger.

[0021] 3. In this utility model, the innovative installation method greatly enhances the structural rigidity of the entire turbocharger assembly. This not only helps resist thermal deformation but also gives it stronger vibration and impact resistance, reducing the risk of damage to the turbocharger caused by engine vibration or external impact, thereby effectively extending the overall service life of the turbocharger. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the heat-resistant turbocharger housing proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the intake passage transition ring of the heat-resistant turbocharger housing proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the intake passage transition ring of the heat-resistant turbocharger housing proposed in this utility model.

[0025] Figure 4 This is a schematic diagram of the compressor intake passage of the heat-resistant turbocharger housing proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the connecting flange of the anti-thermal deformation turbocharger housing proposed in this utility model.

[0027] Legend:

[0028] 1. Turbine housing; 2. Compressor housing; 3. Mounting boss; 4. Exhaust gas outlet transition ring; 5. Exhaust gas outlet; 6. Impeller; 7. Exhaust gas inlet; 8. Exhaust gas inlet transition ring; 9. Turbine exhaust gas guide pipe; 10. Turbine guide port; 11. Flange; 12. Bolt; 13. Guide pipe fixing seat; 14. Compressor outlet guide pipe; 15. Compressor inlet; 16. Fixing screw; 17. Turbine double housing connecting flow channel; 18. Impeller shaft. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Please refer to Figures 1 to 5 This utility model provides a turbocharger housing resistant to thermal deformation, aiming to solve the technical problem that existing turbocharger housings deform due to thermal stress in high-temperature environments, thereby affecting operational stability and efficiency.

[0031] like Figure 1 As shown, the heat-resistant turbocharger housing includes a turbine housing 1 and a compressor housing 2. An impeller 6 is disposed within the turbine housing 1 and the compressor housing 2. The impeller 6 is coaxially mounted via an impeller shaft 18, which is fixedly connected to the impeller 6 and can rotate together. The turbine housing 1 contains an exhaust gas inlet channel 7 and an exhaust gas outlet channel 5 for guiding exhaust gas. The compressor housing 2 contains a compressor inlet channel 15 for drawing in air and a compressor outlet guide pipe 14 for discharging compressed air.

[0032] In this embodiment, a turbine dual-shell connecting channel 17 is integrally disposed between the turbine housing 1 and the compressor housing 2, connecting the two into a single structure. A mounting boss 3 protrudes from the turbine dual-shell connecting channel 17. This mounting boss 3 serves as a robust connection fulcrum, and through a fixing screw 16, it forms a stable and secure connection between the entire heat-resistant turbocharger housing and the engine block. This connection and support structure, comprised of the turbine dual-shell connecting channel 17, the mounting boss 3, and the fixing screw 16, enhances the overall structural rigidity of the turbocharger, resisting thermal deformation of the turbine housing 1 under high-temperature operating conditions.

[0033] To further optimize this technical solution, this embodiment also provides the following preferred solutions:

[0034] Further, please refer to Figure 1 and Figure 5In a preferred embodiment, the heat-resistant turbocharger housing further includes a turbine exhaust gas guide pipe 9. One end of the turbine exhaust gas guide pipe 9 is connected to the exhaust gas intake passage 7 for rapid introduction of high-temperature and high-pressure exhaust gas. For ease of installation, the other end of the turbine exhaust gas guide pipe 9 is fixedly connected to a flange 11. The flange 11 has several mounting holes for bolts 12 to pass through, thereby achieving a detachable and fixed connection with the engine exhaust manifold.

[0035] For a specific connection method, please refer to Figure 2 and Figure 3 Between the turbine exhaust gas guide pipe 9 and the exhaust gas intake channel 7, an exhaust gas intake channel adapter ring 8 is fixedly connected by welding or interference fit to ensure smooth exhaust gas flow and sealing.

[0036] As another preferred option, at the outlet end of the exhaust gas outlet channel 5, an exhaust gas outlet channel adapter ring 4 is connected by clamps or bolts. The exhaust gas outlet channel adapter ring 4 is used to connect to the downstream exhaust pipe.

[0037] To improve the reliability of pipeline fixation, a guide pipe fixing seat 13 is integrally formed on the outer wall of the exhaust gas inlet channel transition ring 8 or the outer wall of the exhaust gas outlet channel transition ring 4. The guide pipe fixing seat 13 provides an additional support or fixing point.

[0038] Reference Figure 1 In order to efficiently convert the exhaust gas energy into the rotational kinetic energy of the impeller 6, a turbine guide port 10 is also provided inside the turbine housing 1. The turbine guide port 10 is set along the tangential direction inside the turbine housing 1, and its outlet is precisely facing the blades of the impeller 6, so that the exhaust gas can impact the impeller 6 at the optimal angle.

[0039] Reference Figure 4 In order to efficiently compress the air and convert the air's velocity energy into pressure energy, the internal flow channel profile of the compressor casing 2 is designed as a volute profile with a cross-sectional area that gradually increases along the airflow direction.

[0040] Working principle:

[0041] During operation, the high-temperature, high-pressure exhaust gas from the engine is guided through the turbine exhaust gas guide pipe 9, which is fixed by the flange 11, into the exhaust gas intake passage 7, and then into the turbine housing 1. Inside the turbine housing 1, the exhaust gas impacts the impeller 6 at high speed along the tangential direction through the turbine guide port 10, converting the thermal and kinetic energy of the exhaust gas into the mechanical work of the impeller 6's rotation. After completing the work, the exhaust gas is discharged from the exhaust gas outlet passage 5.

[0042] The compressor impeller, coaxial with the turbine impeller, rotates synchronously at high speed due to the linkage with the impeller shaft 18. The rotation of the impeller 6 creates a negative pressure at the inlet of the compressor intake passage 15, thereby drawing in air. The high-speed rotating impeller 6, through centrifugal force and the volute profile of the compressor casing 2, converts the velocity energy of the air into pressure energy, completing the air compression process. The compressed pressurized air is then introduced into the engine intake manifold through the compressor outlet guide pipe 14.

[0043] Throughout the entire operation, the turbine double-casing connecting channel 17, which connects the turbine housing 1 and the compressor housing 2, together with the mounting boss 3 and the fixing screw 16 provided thereon, constitutes a high-rigidity and stable structure. This structure firmly connects the turbocharger to the engine block, effectively resists the thermal deformation of the turbine housing 1 caused by the high-temperature exhaust gas, and ensures the precise clearance between the impeller 6 and the housing, thereby improving the working efficiency and stability of the turbocharger.

Claims

1. A turbocharger housing resistant to thermal deformation, comprising: A turbine housing (1) is provided with an exhaust gas inlet passage (7) and an exhaust gas outlet passage (5). A compressor housing (2), wherein the compressor housing (2) is provided with a compressor inlet passage (15) and a compressor outlet guide pipe (14); and An impeller (6) is coaxially disposed within the turbine housing (1) and the compressor housing (2) via an impeller shaft (18); Its characteristic is that it further includes: A turbine double-shell connecting channel (17) connecting the turbine housing (1) and the compressor housing (2); A mounting boss (3) is provided on the turbine double-shell connecting flow channel (17); and A fixing screw (16) is used to fix the housing in conjunction with the mounting boss (3).

2. The heat distortion resistant turbocharger housing of claim 1, wherein, It also includes a turbine exhaust gas guide pipe (9), one end of which is connected to the exhaust gas intake passage (7).

3. The heat distortion resistant turbocharger housing of claim 2, wherein, The other end of the turbine exhaust gas guide pipe (9) is provided with a flange (11), and the flange (11) has a mounting hole for the bolt (12) to pass through.

4. The heat distortion resistant turbocharger housing of claim 2, wherein, An exhaust gas inlet transition ring (8) is provided between the turbine exhaust gas guide pipe (9) and the exhaust gas inlet passage (7).

5. The heat-resistant turbocharger housing according to claim 4, characterized in that, An exhaust gas outlet transition ring (4) is connected to the outlet end of the exhaust gas outlet channel (5).

6. The heat-resistant turbocharger housing according to claim 5, characterized in that, A guide pipe fixing seat (13) is provided on the outer wall of the exhaust gas inlet channel transition ring (8) or the exhaust gas outlet channel transition ring (4).

7. The heat-resistant turbocharger housing according to claim 1, characterized in that, The turbine housing (1) is provided with a turbine guide port (10) inside. The turbine guide port (10) is arranged along the tangential direction of the turbine housing (1) and faces the impeller (6).

8. The heat-resistant turbocharger housing according to claim 1, characterized in that, The internal profile of the compressor housing (2) is a volute profile.

Images