Flywheel for an engine and engine thereof

Abstract

The utility model discloses a flywheel and engine for engine, including flywheel main part, a plurality of blades are equipped with on the flywheel main part along the circumference, and form the air chamber between the adjacent blade, the inner end of air chamber is equipped with the air inlet, the outer end of air chamber is equipped with the air outlet, and the inner end part of blade is equipped with the guide blade that sets up to guide the air inlet in the extension in the circumference on the front side in the axial direction. It has improved its cooling air volume greatly.

Description

Technical Field

[0001] This utility model relates to a flywheel for an engine and its engine, belonging to the field of engine cooling technology. Background Technology

[0002] Currently, in engine cooling systems, multiple cyclone blades are designed on the engine flywheel, with adjacent blades forming a cooling chamber. These blades are primarily centrifugal cyclone blades. When the engine is running, the flywheel rotates synchronously at high speed, driving the cyclone blades on it to rotate as well. As the cyclone blades rotate at high speed with the flywheel, negative pressure is generated at the inner end of the cooling chamber, drawing air into the chamber. Under the structural action of the cyclone blades, the cooling air inside the chamber is centrifugally cut outwards, thus achieving the process of cooling air being cut out from the inside to the outside at a certain speed within the cooling chamber, thereby generating cooling air and further cooling the engine. Patent CN102705438A discloses a bladed air-cooled diesel engine flywheel. Due to the forward-curved negative pressure air intake structure of the flywheel blades, the amount of cooling air utilized is limited. In this case, when used in a conventional engine with a low overall heat load, the amount of cooling air utilized can meet the requirements of the engine. However, when the engine heat load is too high, the cyclone blades of this structure cannot meet the cooling needs of the engine, causing the engine to overheat and ultimately leading to engine failure. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a flywheel for an engine that greatly improves its cooling air volume.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a flywheel for an engine, including a flywheel body, a plurality of blades are provided on the flywheel body along the circumferential direction, and a wind cavity is formed between adjacent blades. An air inlet is provided at the inner end of the wind cavity, and an air outlet is provided at the outer end of the wind cavity. A guide vane is provided on the front side of the inner end of the blade in the axial direction, which extends in the circumferential direction to guide the air intake.

[0005] Furthermore, the flywheel body includes a base, and the blades are connected to the base on the rear side in the axial direction.

[0006] Furthermore, the blade includes a long blade and a short blade, the long blade being longer than the short blade in the inward and outward directions, and the long blade and the short blade being staggered in the circumferential direction.

[0007] Furthermore, the flywheel body rotates in the circumferential direction along a first direction, and the guide vanes extend along the first direction.

[0008] Furthermore, the second direction is the opposite of the first direction in the circumferential direction, and the middle part of the blade is bent in the second direction.

[0009] Furthermore, the blade includes a first straight portion, a curved portion, and a second straight portion, wherein the curved portion connects the first straight portion and the second straight portion.

[0010] Furthermore, in order to better guide the air intake, the guide vane is axially curved forward and the angle α with the blade is greater than 90°.

[0011] Furthermore, the length of the guide vane in the inward and outward directions is shorter than the length of the corresponding blade.

[0012] Furthermore, in order to better increase the air volume of its cooling air, an axial flow fan is provided in the middle of the flywheel body, and the air introduced by the axial flow fan is forced into the air inlet.

[0013] This utility model also provides an engine, including the flywheel for the above-mentioned engine.

[0014] After adopting the above technical solution, this utility model has the following beneficial effects:

[0015] 1. This utility model has a guide vane at the inner end of the blade, and the guide vane and the blade are at a certain angle in the axial direction, forming a warped structure. When the flywheel rotates, the warped guide vane will directly cut the air into the corresponding air cavity and generate a certain pressure. This process changes the original negative pressure air intake to pressure cutting air into the air cavity, further increasing the amount of cooling air entering the air cavity and improving the air volume of the engine cooling air;

[0016] 2. By combining the functions of an axial flow fan and a flywheel structure, and utilizing the structural characteristics of axial flow blades, cooling air is forced into the air cavity (compared to negative pressure intake of cooling air, the cooling air volume is greatly increased). Furthermore, the cooling air inside the air cavity is centrifugally swirled outward, achieving normal cooling for engines with low or high overall heat loads, ensuring normal engine operation and preventing quality problems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the flywheel for the engine according to this utility model;

[0018] Figure 2 for Figure 1 A partial schematic diagram;

[0019] Figure 3 This is a schematic diagram of the structure of the long blade of this utility model;

[0020] Figure 4 for Figure 3 AA section view;

[0021] Figure 5 for Figure 3 CC section view;

[0022] Figure 6 This is a schematic diagram of the structure of the short blade of this utility model;

[0023] Figure 7 for Figure 6 BB cross-sectional view;

[0024] Figure 8 for Figure 6 DD sectional view; where,

[0025] 1. Blade; 11. First straight section; 12. Curved section; 13. Second straight section;

[0026] 2. Air cavity; 21. Air inlet; 22. Air outlet;

[0027] 3. Guide vanes;

[0028] 4. Matrix. Detailed Implementation

[0029] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] like Figure 1-8 As shown, an engine flywheel includes a flywheel body with multiple blades arranged circumferentially on the flywheel body. A wind chamber is formed between adjacent blades. An air inlet is provided at the inner end of the wind chamber, and an air outlet is provided at the outer end of the wind chamber. A guide vane is provided on the front side of the inner end of the blade in the axial direction, extending circumferentially to guide the incoming air.

[0031] In this embodiment, a guide vane is provided at the inner end of the blade. The guide vane and the blade are at a certain angle in the axial direction, forming a warped structure. When the flywheel rotates, the warped guide vane will directly cut air into the corresponding air cavity and generate a certain pressure. This process changes the original negative pressure air intake to pressure cutting air into the air cavity, further increasing the amount of cooling air entering the air cavity and improving the air volume of the engine cooling air.

[0032] Specifically, such as Figure 1 , 2 As shown, the flywheel body includes a base, and the blades are connected to the base on the rear side in the axial direction.

[0033] Specifically, such as Figure 1 , 2 As shown, the blades include long blades and short blades. The length of the long blades is greater than that of the short blades in the inward and outward directions. The long blades and short blades are staggered in the circumferential direction.

[0034] Specifically, such as Figure 1 , 2 As shown, the flywheel body rotates in the circumferential direction along a first direction, and the guide vanes extend along the first direction.

[0035] Specifically, such as Figure 1 , 2 As shown, the second direction is the opposite of the first direction in the circumferential direction, and the middle part of the blade is bent in the second direction.

[0036] Specifically, such as Figures 3-8 As shown, the blade includes a first straight section, a curved section, and a second straight section, with the curved section connecting the first straight section and the second straight section.

[0037] Specifically, such as Figure 4 , 7 As shown, in order to better guide the air intake, the guide vanes are curved forward axially, and the angle α with the blades is greater than 90°.

[0038] Specifically, such as Figure 3 , 6 As shown, the length of the guide vane in the inward and outward directions is shorter than the length of the corresponding blade.

[0039] Specifically, to better increase the airflow for cooling, an axial flow fan is installed in the middle of the flywheel body. The air introduced by the axial flow fan is forced into the air inlet. By integrating the axial flow fan with the flywheel structure, and utilizing the characteristics of the blade structure, cooling air is forced into the air chamber (compared to negative pressure intake, the cooling airflow is greatly increased). The cooling air inside the air chamber is then centrifugally spun outwards, achieving normal cooling for engines with low or high overall heat loads, ensuring normal engine operation and preventing quality problems.

[0040] In this embodiment, the blade and the corresponding guide vane can be an integral structure or a separate structure.

[0041] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flywheel for an engine, characterized in that: The device includes a flywheel body, on which multiple blades are arranged circumferentially, and a wind cavity is formed between adjacent blades. An air inlet is provided at the inner end of the wind cavity, and an air outlet is provided at the outer end of the wind cavity. The inner end of each blade has a guide vane that extends circumferentially to guide the incoming air on the front side in the axial direction.

2. The flywheel for an engine according to claim 1, characterized in that, The flywheel body includes a base, and the blades are connected to the base on the rear side in the axial direction.

3. The flywheel for an engine according to claim 1, characterized in that, The blade includes a long blade and a short blade. The long blade is longer than the short blade in the inward and outward directions. The long blade and the short blade are staggered in the circumferential direction.

4. The flywheel for an engine according to claim 1, characterized in that, The flywheel body rotates circumferentially along a first direction, and the guide vanes extend along the first direction.

5. The flywheel for an engine according to claim 4, characterized in that, The second direction is the opposite of the first direction in the circumferential direction, and the middle part of the blade is bent in the second direction.

6. The flywheel for an engine according to claim 5, characterized in that, The blade includes a first straight portion, a curved portion, and a second straight portion, wherein the curved portion connects the first straight portion and the second straight portion.

7. The flywheel for an engine according to claim 1, characterized in that, The guide vane is axially curved forward and the angle α with the blade is greater than 90°.

8. The flywheel for an engine according to claim 1, characterized in that, The length of the guide vane in the inward and outward directions is shorter than the length of the corresponding blade.

9. The flywheel for an engine according to claim 1, characterized in that, An axial flow fan is provided in the middle of the flywheel body, and the air introduced by the axial flow fan is forced into the air inlet.

10. An engine, characterized in that, Including an engine flywheel as described in any one of claims 1 to 9.

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