A supercharger for a motorcycle

Abstract

The application belongs to the technical field of superchargers, and discloses a supercharger for a motorcycle, which comprises a shell, an air inlet pipe and an air outlet pipe are mounted on the shell, the air outlet pipe is integrally formed with the shell and communicates with the internal space of the shell, a plurality of helical air inlet grooves are arranged on the inner wall of the air inlet pipe in a circumferential direction, an impeller is rotatably arranged in the shell, the impeller comprises a disc and a plurality of blades arranged on the disc in a circumferential direction, the thickness of the disc decreases from the middle part to the edge in a gradient manner, and the blades are curved in an arc shape along the rotation direction of the impeller. The helical air inlet grooves can guide air to enter the supercharger in a spiral and orderly manner, produce a pre-rotation effect, and ensure the stable operation of the impeller. The impeller rotatably arranged in the shell, the thickness of the disc decreasing from the middle part to the edge in a gradient manner can adapt to the flow path of air flow from the center to the edge, and the arc-shaped blades can more smoothly push the air flow to move, reduce air friction loss, and optimize the supercharging effect.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger technology, and in particular to a turbocharger for motorcycles. Background Technology

[0002] A supercharger compresses the air before it enters the engine cylinders, increasing its density and allowing more air to fill the cylinders, thus increasing engine power. The purpose is to increase air intake, improve power, enhance fuel economy, and reduce emissions. A supercharger can be connected to the air intake of a motorcycle engine to further boost its power.

[0003] Currently, traditional turbochargers have simple air intake designs. Under complex conditions such as rapid acceleration and cornering, the airflow velocity is uneven and turbulent when entering the turbocharger, leading to unstable impeller operation and reduced boost efficiency. Furthermore, the relatively simple impeller shape results in significant frictional losses during airflow, limiting boost pressure. Utility Model Content

[0004] To solve the above problems, this utility model provides a supercharger for motorcycles.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a supercharger for motorcycles, comprising a housing, an intake pipe installed on the outer side of the housing, the intake pipe being integrally formed with the housing and communicating with the internal space of the housing, an exhaust pipe also being provided on the housing, the exhaust pipe being integrally formed with the housing and communicating with the internal space of the housing, a plurality of circumferentially spaced spiral intake grooves being formed on the inner wall of the intake pipe, an impeller being rotatably arranged inside the housing, the impeller comprising a disc and a plurality of blades arranged circumferentially spaced on the disc, the thickness of the disc decreasing gradually from the center to the edge, and the blades being curved in an arc along the rotation direction of the impeller.

[0006] By adopting the above technical solution, including the casing, inlet pipe, outlet pipe, and impeller, the spiral inlet slot guides air into the turbocharger in a spiral pattern, producing a pre-swirl effect. This ensures stable impeller operation, and the pre-swirl effect is best when the impeller speed is within the later speed range. According to fluid mechanics principles, pre-swirl allows the air to have a certain circumferential velocity before entering the impeller, better matching the impeller's rotation direction and reducing intake impact losses. The impeller rotating inside the casing features a gradient thickness design from the center to the edge, which adapts to the airflow path from the center to the edge. The curved blades further propel the airflow more smoothly, reducing air friction losses and optimizing the boosting effect.

[0007] Furthermore, the spiral air intake groove extends spirally from the inlet end of the air intake pipe into the housing along the impeller rotation direction.

[0008] By adopting the above technical solution, the airflow can form a motion trend consistent with the impeller rotation before entering the casing.

[0009] Furthermore, the total rotation angle of the spiral air intake groove around the axis is 180 degrees.

[0010] By adopting the above technical solution, it can be ensured that the airflow forms a stable spiral motion within the intake pipe.

[0011] Furthermore, an annular groove is formed on the inner wall at the inlet end of the air intake pipe, and the groove wall slopes from the bottom of the annular groove toward the housing.

[0012] By adopting the above technical solution, the tank wall is inclined from the bottom of the tank towards the shell, which can guide and converge the airflow entering the intake pipe, avoid the airflow from becoming turbulent or flowing back at the inlet end, and improve the stability and continuity of the intake.

[0013] Furthermore, the housing has a mounting hole on the side away from the air intake pipe, and a rotating disk connected to the wheel is rotatably installed in the mounting hole. A connecting shaft is concentrically installed on the side of the rotating disk away from the wheel.

[0014] By adopting the above technical solution, a rotating disk and a connecting shaft are set up. The rotating disk provides stable installation and rotation support for the impeller, and the connecting shaft can be easily connected to external drive components to ensure that the impeller can obtain continuous and stable driving force.

[0015] Furthermore, the mounting hole is arranged concentrically with the air intake pipe, and the wheel is arranged concentrically with the rotating disk.

[0016] By adopting the above technical solution, the mounting hole and the air inlet pipe are arranged concentrically, and the impeller and the rotating disk are arranged concentrically. This ensures that the impeller rotation center is consistent with the air inlet pipe axis, so that the airflow can enter the casing evenly along the air inlet pipe axis direction. This avoids the problem of uneven airflow distribution and impeller force imbalance caused by eccentricity, and reduces the vibration and noise when the impeller rotates.

[0017] Furthermore, the chord length of the blade gradually shortens from the root near the rotating disk to the top away from the rotating disk.

[0018] By adopting the above technical solution, air can be smoothly accelerated during the flow process.

[0019] Furthermore, the thickness of the blade gradually decreases from the root near the rotating disk to the top away from the rotating disk.

[0020] By adopting the above technical solutions, while ensuring the structural strength of the blade root to withstand large torque, the mass and airflow resistance at the blade tip are reduced, and the flow loss of air on the blade surface is also reduced, thereby improving the airflow propulsion efficiency.

[0021] Furthermore, the axis of the intake pipe is perpendicular to the axis of the exhaust pipe.

[0022] By adopting the above technical solution, the airflow can be pressurized inside the casing and then discharged at a more reasonable angle.

[0023] Furthermore, the side of the wheel furthest from the rotating disk is located inside the air intake pipe.

[0024] By adopting the above technical solution, the distance of airflow from the intake pipe to the blades is shortened.

[0025] In summary, this utility model has the following beneficial effects: 1. In this application, a casing, an inlet pipe, an outlet pipe, and an impeller are provided. The spiral inlet groove guides air into the turbocharger in a spiral and orderly manner, producing a pre-swirl effect. This ensures stable impeller operation, and the pre-swirl effect is better when the impeller speed is in the later speed range. According to fluid mechanics principles, pre-swirl allows the air to have a certain circumferential velocity before entering the impeller, better matching the impeller's rotation direction and reducing intake impact losses. The impeller rotating inside the casing has a thickness design that gradually decreases from the center to the edge, which adapts to the airflow path from the center to the edge. The curved blades can more smoothly propel the airflow, reducing air friction losses and optimizing the supercharging effect. 2. In this application, the mounting hole and the air inlet pipe are arranged concentrically, and the impeller and the rotating disk are arranged concentrically. This ensures that the impeller rotation center is consistent with the air inlet pipe axis, so that the airflow can enter the casing evenly along the air inlet pipe axis direction. This avoids the problem of uneven airflow distribution and impeller force imbalance caused by eccentricity, and reduces the vibration and noise when the impeller rotates. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a front view of an embodiment of the present utility model; Figure 3 yes Figure 2 AA section view; Figure 4 This is a schematic diagram of the shell structure of an embodiment of this utility model.

[0027] In the diagram: 10. Shell; 11. Inlet pipe; 12. Outlet pipe; 13. Spiral inlet groove; 14. Annular groove; 20. Impeller; 21. Wheel; 22. Blade; 30. Rotating disk; 31. Connecting shaft. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1-4 As shown in the illustration, this application discloses a supercharger for motorcycles, including a housing 10. An intake pipe 11 is mounted on the outer surface of the housing 10. The intake pipe 11 is integrally formed with the housing 10 and communicates with the internal space of the housing 10. An exhaust pipe 12 is also provided on the housing 10, integrally formed with the housing 10 and communicating with the internal space of the housing 10. The exhaust pipe 12 is connected to the air intake of the motorcycle engine. The housing 10, intake pipe 11, and exhaust pipe 12 are integrally formed, which not only enhances the overall structural strength and avoids the air leakage problem that may occur with separate connections, but also reduces the resistance loss of airflow at the interface. The axis of the intake pipe 11 is perpendicular to the axis of the exhaust pipe 12. This allows the airflow to be pressurized within the housing 10 and then discharged at a more reasonable angle.

[0030] Specifically, the inner wall of the intake pipe 11 has several circumferentially spaced spiral intake grooves 13. An impeller 20 is rotatably mounted inside the housing 10, and the impeller 20 is integrally formed from a high-strength, low-density alloy material. The impeller 20 includes a disk 21 and several blades 22 arranged circumferentially on the disk 21. The thickness of the disk 21 decreases gradually from the center to the edge, and the blades 22 are curved in an arc along the rotation direction of the impeller 20. The spiral intake grooves 13 guide air into the turbocharger in a spiral pattern, producing a pre-swirl effect, ensuring stable operation of the impeller 20. The pre-swirl effect is better when the impeller 20's speed is in the later speed range. According to fluid mechanics principles, pre-swirl allows the air to have a certain circumferential velocity before entering the impeller 20, better matching the impeller 20's rotation direction and reducing intake impact losses. Simultaneously, the circumferentially spaced arrangement ensures uniform airflow distribution. The impeller 20, rotating within the housing 10, features a gradually decreasing thickness design from the center to the edge of the disc 21, which adapts to the airflow path from the center to the edge. The curved blades 22 further facilitate smoother airflow, reducing air friction losses and optimizing the boost effect. Within the common engine speeds and intake flow ranges of motorcycles, this ensures that air flows into the supercharger evenly and stably, effectively improving uneven intake conditions. The side of the disc 21 furthest from the rotating disk 30 is located inside the intake pipe 11, shortening the distance the airflow travels from the intake pipe 11 to the blades 22.

[0031] In this configuration, an annular groove 14 is formed on the inner wall of the inlet end of the intake pipe 11, with the groove wall inclined from the bottom of the groove towards the housing 10. This inclination of the groove wall towards the housing 10 guides and converges the airflow entering the intake pipe 11, preventing turbulence or backflow at the inlet end and improving the stability and continuity of the intake. A spiral intake groove 13 extends spirally from the inlet end of the intake pipe 11 towards the interior of the housing 10, following the rotation direction of the impeller 20. This allows the airflow to form a motion trend consistent with the impeller 20's rotation direction before entering the housing 10, reducing the relative velocity between the airflow and the impeller 20 after entering the housing 10, minimizing energy loss, and enabling the impeller 20 to drive the airflow more efficiently, further improving boosting efficiency. The total rotation angle of the spiral intake groove 13 around its axis is 180 degrees. It can ensure that the airflow forms a stable spiral motion in the intake pipe 11, and will not cause the airflow to have an excessively long flow path and increased resistance due to excessive turning angle. It achieves a balance between kinetic energy reserve and flow resistance, and ensures intake efficiency.

[0032] In the specific configuration, a mounting hole is provided on the side of the housing 10 away from the air inlet pipe 11. A rotating disk 30, connected to the impeller 21, is rotatably mounted in the mounting hole. A connecting shaft 31 is concentrically arranged on the side of the rotating disk 30 away from the impeller 21. The rotating disk 30 provides stable mounting and rotational support for the impeller 20, and the connecting shaft 31 can be easily connected to external drive components to ensure that the impeller 20 can obtain continuous and stable driving force. The mounting hole is concentrically arranged with the air inlet pipe 11, and the impeller 21 is concentrically arranged with the rotating disk 30. By arranging the mounting hole and the air inlet pipe 11 concentrically, and the impeller 21 and the rotating disk 30 concentrically, it is ensured that the rotation center of the impeller 20 is aligned with the axis of the air inlet pipe 11. This allows the airflow to enter the housing 10 evenly along the axis of the air inlet pipe 11, avoiding uneven airflow distribution and force imbalance of the impeller 20 due to eccentricity, and reducing vibration and noise during impeller rotation. The chord length of blade 22 gradually shortens from the root near the rotating disk 30 to the top away from the rotating disk 30. This allows the air to accelerate smoothly during flow. The thickness of blade 22 also gradually decreases from the root near the rotating disk 30 to the top away from the rotating disk 30. This ensures the structural strength of the blade root to withstand greater torque while reducing the mass and airflow resistance at the tip of blade 22, and also reduces airflow losses on the surface of blade 22, thus improving airflow propulsion efficiency.

[0033] The operating principle of a motorcycle supercharger in this embodiment is as follows: Based on the integral molding of the housing 10, intake pipe 11, and exhaust pipe 12, the annular groove 14 of the inclined groove wall inside the intake pipe 11 first gathers and guides the airflow, and then through the spiral intake groove 13, the airflow forms a pre-swirl, which matches the rotation direction of the impeller 20 in advance to reduce impact loss. The impeller 20, which is stably driven by the rotating disk 30 and the connecting shaft 31 inside the housing 10, adapts to the airflow path with the gradually thinning disk 21 from the middle to the edge, and the blades 22 with gradually shortening chord length, gradually thinning thickness and arc curvature. While ensuring structural strength, it allows the airflow to be smoothly accelerated and efficiently propelled, and finally realizes that the air flows in evenly and stably within the commonly used speed range of the motorcycle engine and completes the supercharging.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A supercharger for motorcycles, comprising a housing (10), characterized in that: An air inlet pipe (11) is installed on the outer side of the housing (10). The air inlet pipe (11) is integrally formed with the housing (10) and communicates with the internal space of the housing (10). An air outlet pipe (12) is also provided on the housing (10). The air outlet pipe (12) is integrally formed with the housing (10) and communicates with the internal space of the housing (10). Several spiral air inlet grooves (13) are arranged circumferentially on the inner wall of the air inlet pipe (11). An impeller (20) is rotatably arranged inside the housing (10). The impeller (20) includes a disk (21) and several blades (22) arranged circumferentially on the disk (21). The thickness of the disk (21) decreases gradually from the middle to the edge. The blades (22) are curved in an arc along the rotation direction of the impeller (20).

2. A supercharger for a motorcycle according to claim 1, characterized in that: The spiral air inlet groove (13) extends spirally from the inlet end of the air inlet pipe (11) into the housing (10) along the rotation direction of the impeller (20).

3. A supercharger for a motorcycle according to claim 1, characterized in that: The total rotation angle of the spiral air intake groove (13) around the axis is 180 degrees.

4. A supercharger for a motorcycle according to claim 1, characterized in that: An annular groove (14) is provided on the inner wall at the inlet end of the air intake pipe (11), and the groove wall of the annular groove (14) is inclined from the bottom of the annular groove (14) toward the shell (10).

5. A supercharger for a motorcycle according to claim 1, characterized in that: The housing (10) has an installation hole on the side away from the air inlet pipe (11). A rotating disk (30) connected to the wheel (21) is rotatably installed in the installation hole. A connecting shaft (31) is concentrically installed on the side of the rotating disk (30) away from the wheel (21).

6. A supercharger for a motorcycle according to claim 5, characterized in that: The mounting hole is arranged concentrically with the air intake pipe (11), and the wheel (21) is arranged concentrically with the rotating disk (30).

7. A supercharger for a motorcycle according to claim 5, characterized in that: The chord length of the blade (22) gradually shortens from the root near the rotating disk (30) to the top away from the rotating disk (30).

8. A supercharger for a motorcycle according to claim 5, characterized in that: The thickness of the blade (22) gradually decreases from the root near the rotating disk (30) to the top away from the rotating disk (30).

9. A supercharger for a motorcycle according to claim 1, characterized in that: The axis of the air inlet pipe (11) is perpendicular to the axis of the air outlet pipe (12).

10. A supercharger for a motorcycle according to claim 1, characterized in that: The side of the wheel (21) away from the rotating disk (30) is located inside the air intake pipe (11).

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