Cooling system of engine

Abstract

The utility model discloses a cooling system of an engine, the engine comprises a cylinder body, a plurality of cooling fins are arranged on the outer wall of the cylinder body, a crankshaft transversely penetrates through the cylinder body, an impeller cover is arranged on one side of the cylinder body, a centrifugal impeller is mounted in the impeller cover, and a cooling fan is arranged on the outer wall of the cylinder body. The centrifugal impeller is assembled at the first end of the crankshaft and rotates along with the crankshaft; a wind scooper is arranged above the impeller cover, the upper end of the wind scooper is jointed with the cylinder body, the lower end of the wind scooper is opposite to the impeller cover, and the wind scooper is used for guiding cooling air in the impeller cover to flow to radiating fins on the cylinder body and to be discharged from the other side of the cylinder body; the impeller cover further comprises an air duct inlet, an axial flow fan is installed at the second end of the crankshaft, and the axial flow fan is used for conveying cooling air to the air duct inlet.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a heat dissipation system of an engine. Background Art

[0002] In the current field of air-cooled engines, especially single-cylinder air-cooled engines, the cooling of the engine is mainly achieved by arranging heat sinks on the outer circle of the cylinder liner, the bottom of the oil pan, and the outside and inside of the cylinder head. The cooling air is sucked in axially by a centrifugal fan, enters the axial air inlet of the centrifugal fan through the air inlet of the air scoop, and is discharged from the exhaust side of the engine through the volute inside the air scoop.

[0003] Existing cooling systems often rely on a centrifugal fan to guide airflow, but this fails to provide a focused cooling effect, particularly for the engine block. Furthermore, the cooling air is typically directed and delivered solely through the centrifugal fan, resulting in poor results, particularly for the oil chamber at the bottom of the engine.

[0004] The above content is only used to assist in understanding the technical solution of this application, and does not mean that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, the present application provides a heat dissipation system for an engine to solve the defects of the existing technology.

[0006] The technical solution adopted by the present application to solve the technical problem is: a heat dissipation system of an engine, the engine comprising a cylinder block, a plurality of heat dissipation fins arranged on the outer wall of the cylinder block,

[0007] A crankshaft is laterally passed through the cylinder body, and an impeller cover is provided on one side of the cylinder body. A centrifugal impeller is installed in the impeller cover. The centrifugal impeller is mounted on the first end of the crankshaft and rotates with it.

[0008] An air guide cover is provided above the impeller cover, the upper end of the air guide cover is engaged with the cylinder body, and the lower end of the air guide cover is opposite to the impeller cover, and is used to guide the cooling air in the impeller cover to flow to the heat sink on the cylinder body and be discharged from the other side of the cylinder body;

[0009] The impeller cover also includes an air duct inlet. An axial flow fan is installed at the second end of the crankshaft. The axial flow fan is used to transport cooling air to the air duct inlet.

[0010] In some embodiments, a guide baffle is provided inside the air guide cover, a first side of the guide baffle is close to the upper inlet of the impeller cover, and a second side of the guide baffle is close to the upper outlet of the impeller cover.

[0011] In some embodiments, when the centrifugal impeller rotates, the wind in the impeller cover is guided to be transported from the upper inlet to the upper outlet.

[0012] In some embodiments, the impeller cover includes an inner cover and an outer cover, and the inner cover and the outer cover are combined to form an annular vortex air duct, and the outer ends of the blades of the centrifugal impeller are close to the vortex air duct.

[0013] In some embodiments, a cylinder guard plate is further installed on the side of the air guide cover close to the upper outlet of the impeller cover, and the cylinder guard plate forms an air collecting port connected with the upper outlet of the impeller cover and the air guide cover.

[0014] In some embodiments, the cylinder guard plate has a bent guide plate on a side close to the axial flow fan, and the bent guide plate covers at least a portion of the heat sink of the cylinder.

[0015] In some embodiments, an oil chamber is provided below the cylinder body, and the cooling air delivered by the axial flow fan flows through the oil chamber and the lower part of the cylinder body.

[0016] The beneficial effects of the present application are as follows: an air guide cover is provided above the impeller cover, which can better guide and concentrate the cooling air in the impeller cover, and dissipate the heat to the heat sink on the outer wall of the cylinder body in a targeted manner; secondly, an axial flow fan is also installed on the same crankshaft, which can dissipate the heat to the oil chamber and help increase the air volume and wind speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the structure of this application.

[0019] Figure 2 This is a structural diagram from another angle of this application.

[0020] Figure 3 It is a structural diagram of the hidden external and centrifugal impeller of this application.

[0021] Figure 4 This is a schematic diagram of the inner structure of the air guide cover of the present application.

[0022] Explanation of reference numerals: 1. Cylinder, 11. Radiating fin, 2. Crankshaft, 3. Impeller cover, 31. Air duct inlet, 32. Upper end inlet, 33. Upper end outlet, 34. Inner cover, 35. Outer cover, 36. Turbulent air duct, 4. Centrifugal impeller, 5. Wind guide cover, 51. Guide baffle, 6. Cylinder guard, 61. Air collecting port, 62. Bending guide plate, 7. Oil chamber, 8. Axial flow fan. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on that a person of ordinary skill in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0024] Please refer to Figure 1-4 The present application provides a heat dissipation system of an engine, the engine comprising a cylinder, a plurality of radiating fins arranged on the outer wall of the cylinder, a crankshaft transversely penetrating the cylinder, an impeller cover arranged on one side of the cylinder, a centrifugal impeller installed in the impeller cover, and the centrifugal impeller being assembled at the first end of the crankshaft and rotating with the crankshaft.

[0025] An air guide cover is arranged above the impeller cover, the upper end of the air guide cover is connected with the cylinder, and the lower end of the air guide cover is opposite to the impeller cover, for guiding the cooling air in the impeller cover to flow to the radiating fins on the cylinder and being discharged from the other side of the cylinder.

[0026] The impeller cover further comprises an air duct inlet, an axial flow fan is installed at the second end of the crankshaft, and the axial flow fan is used for conveying cooling air to the air duct inlet.

[0027] Please refer to Figure 4 The inside of the air guide cover is provided with a guide baffle, the first side of the guide baffle is close to the upper end inlet of the impeller cover, and the second side of the guide baffle is close to the upper end outlet of the impeller cover.

[0028] In some embodiments, the centrifugal impeller guides the air in the impeller cover to flow from the upper end inlet to the upper end outlet when the centrifugal impeller rotates. The rotation of the centrifugal impeller can effectively guide the cooling air to flow into the upper end inlet of the impeller cover and be discharged through the upper end outlet, thereby improving the flow efficiency of the cooling air.

[0029] In some embodiments, the impeller cover comprises an inner cover and an outer cover, the inner cover and the outer cover combine to form an annular vortex air duct, and the outer ends of the blades of the centrifugal impeller are close to the vortex air duct. Through the annular vortex air duct design, stable vortex of cooling air can be formed inside the impeller cover, and the heat dissipation efficiency is improved.

[0030] In some embodiments, the air guide cover is further provided with a cylinder guard plate close to the side of the upper end outlet of the impeller cover, and the cylinder guard plate forms a wind collecting port connected with the upper end outlet of the impeller cover and the air guide cover. Through the wind collecting port formed by the cylinder guard plate, the cooling air can be effectively guided to the cooling fins on the cylinder, and the cooling effect of the cooling fins is improved.

[0031] In some embodiments, the cylinder guard plate is provided with a bending guide plate close to the side of the axial flow fan, and the bending guide plate covers at least part of the cooling fins of the cylinder. Through the design of the bending guide plate, the cooling air can be more effectively guided to the cooling fins, and the cooling effect of the cooling fins is improved.

[0032] In some embodiments, an oil chamber is arranged below the cylinder, and the cooling air delivered by the axial flow fan flows through the oil chamber and the lower part of the cylinder. Through the cooling air delivered by the axial flow fan flowing through the oil chamber and the lower part of the cylinder, not only the cooling effect of the cooling fins is improved, but also the service life of the lubricating oil in the oil chamber is improved.

[0033] The working process of the embodiments of the present application is as follows: when the crank connecting rod mechanism in the cylinder works, it drives the crankshaft to rotate synchronously, which synchronously drives the centrifugal impeller and the axial flow fan to rotate, the air on the side of the cylinder is delivered by the axial flow fan to flow through the oil chamber, the lower part of the cylinder, the air duct inlet, and the vicinity of the upper end inlet of the centrifugal impeller, and then the cooling air is delivered to the upper end outlet through the vortex air duct by the rotation of the centrifugal impeller, and the cooling fins on the cylinder are concentratedly cooled under the guidance of the air guide cover and the cylinder guard plate, and finally the cooling air is discharged from the cooling fins on the other side of the cylinder guard plate, and the cooling is completed.

[0034] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A heat dissipation system for an engine, the engine comprising a cylinder block, a plurality of heat dissipation fins arranged on the outer wall of the cylinder block, A crankshaft is disposed transversely through the cylinder body, and is characterized in that: An impeller cover is provided on one side of the cylinder body, and a centrifugal impeller is installed in the impeller cover. The centrifugal impeller is assembled at the first end of the crankshaft and rotates with it; An air guide cover is provided above the impeller cover, the upper end of the air guide cover is engaged with the cylinder body, and the lower end of the air guide cover is opposite to the impeller cover, and is used to guide the cooling air in the impeller cover to flow to the heat sink on the cylinder body and be discharged from the other side of the cylinder body; The impeller cover also includes an air duct inlet. An axial flow fan is installed at the second end of the crankshaft. The axial flow fan is used to transport cooling air to the air duct inlet.

2. The engine cooling system according to claim 1, characterized in that: A guide baffle is provided inside the air guide cover, a first side of the guide baffle is close to the upper inlet of the impeller cover, and a second side of the guide baffle is close to the upper outlet of the impeller cover.

3. The engine cooling system according to claim 2, characterized in that: When the centrifugal impeller rotates, the wind in the impeller cover is guided to be transported from the upper inlet to the upper outlet.

4. The engine cooling system according to claim 1, characterized in that: The impeller cover comprises an inner cover and an outer cover. The inner cover and the outer cover are combined to form an annular vortex air duct. The outer ends of the blades of the centrifugal impeller are close to the vortex air duct.

5. The engine cooling system according to claim 2, characterized in that: A cylinder guard plate is also installed on the side of the air guide cover close to the upper end outlet of the impeller cover, and the cylinder guard plate is formed with an air collecting port connected with the upper end outlet of the impeller cover and the air guide cover.

6. The engine cooling system according to claim 5, characterized in that: The side of the cylinder guard plate close to the axial flow fan has a bent guide plate, and the bent guide plate covers at least part of the heat dissipation fins of the cylinder.

7. The engine cooling system according to claim 1, characterized in that: An oil chamber is provided below the cylinder body, and the cooling air delivered by the axial flow fan flows through the oil chamber and the lower part of the cylinder body.

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