Efficient heat dissipation device for engine

Abstract

The utility model provides an efficient heat dissipation device for an engine. The efficient heat dissipation device comprises a rack and an axial flow fan. And the rack is connected with the engine. And the axial fan is rotationally arranged on the rack and is driven by an engine crankshaft. The air supply area of the axial fan covers the whole engine. According to the embodiment, the axial flow fan supplies air in the axial direction of the fan, the size of the axial flow fan is large enough, the air supply area of the axial flow fan can cover the whole engine, and therefore air cooling heat dissipation can be conducted on all parts of the whole engine from one side at the same time, and the heat dissipation effect is improved. In addition, compared with a combined heat dissipation scheme of a centrifugal fan and a wind scooper, direct air supply of the axial fan has the advantages that airflow directly blows the engine, kinetic energy loss is avoided, and the heat dissipation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and particularly relates to an engine efficient heat dissipation device. Background Art

[0002] Engine heat dissipation usually adopts the cooperation of a centrifugal fan and an air guide cover. Specifically, a centrifugal fan is arranged on the side of the engine and connected to the outer end of the engine crankshaft. An air guide cover covers the centrifugal fan. The centrifugal fan is driven by the engine crankshaft to rotate, and the air guide cover guides the air blown out by the centrifugal fan to the engine to achieve the purpose of engine heat dissipation. The heat dissipation effect directly affects the engine power. How to further improve the heat dissipation effect is an urgent problem to be solved. Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides an engine efficient heat dissipation device, which can solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0004] The utility model provides an engine efficient heat dissipation device, including:

[0005] A frame, connected to the engine; and

[0006] An axial flow fan, rotatably arranged on the frame and driven by the engine crankshaft;

[0007] The air supply area of the axial flow fan covers the whole engine.

[0008] Preferably, it further includes:

[0009] A first pulley, rotatably arranged on the frame and connected to the crankshaft of the engine; and

[0010] A second pulley, rotatably arranged on the frame, coaxially connected to the axial flow fan, and connected to the first pulley through a belt drive.

[0011] Preferably, the diameter of the second pulley is larger than that of the first pulley.

[0012] Preferably, the projection of the second pulley is located above the engine crankshaft.

[0013] Preferably, it further includes two third pulleys; the two third pulleys are located between the first pulley and the second pulley; the connection line of the first pulley and the second pulley intersects with the connection line of the two third pulleys; the first pulley, the second pulley and the two third pulleys are connected through the belt drive.

[0014] Preferably, it further includes an annular support; the annular support is fixedly connected to the frame; the surface of the annular support facing the first pulley is a conical surface, and the axis of the annular support coincides with the axis of the first pulley.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] In the technology of the utility model, the axial flow fan blows air along the axial direction of the fan, and the size of the axial flow fan is large enough, and its air supply area can cover the entire engine, so that the whole engine can be air-cooled and dissipated from one side at the same time, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 A three-dimensional view of a high-efficiency engine heat dissipation device cooperating with an engine in an embodiment of the utility model;

[0019] Figure 2 For Figure 1 Another three-dimensional view;

[0020] Figure 3 A three-dimensional view of a high-efficiency engine heat dissipation device in an embodiment of the utility model;

[0021] Figure 4 For Figure 3 Another three-dimensional view (without the axial flow fan).

[0022] REFERENCE NUMERALS:

[0023] 10, frame;

[0024] 20, axial flow fan;

[0025] 30, first pulley;

[0026] 40, second pulley;

[0027] 50, third pulley;

[0028] 60, annular support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The embodiments of the technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present utility model more clearly, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0030] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0031] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0032] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "plurality" is more than two unless otherwise specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0035] See Figures 1 to 4, this embodiment provides an engine efficient heat dissipation device, including a frame 10 and an axial flow fan 20.

[0036] The frame 10 is connected to the engine. The axial flow fan 20 is rotatably arranged on the frame 10 and is driven by the engine crankshaft. The air supply area of the axial flow fan 20 covers the whole engine.

[0037] In this embodiment, the axial flow fan 20 supplies air along the fan axis, and the size of the axial flow fan 20 is large enough, and its air supply area can cover the whole engine, so that the whole engine can be air-cooled and dissipated from one side at the same time, thereby improving the heat dissipation effect. In addition, compared with the combined heat dissipation scheme of a centrifugal fan and a wind guide cover, the axial flow fan 20 directly supplies air, and the air flow blows directly on the engine without kinetic energy loss, further improving the heat dissipation effect.

[0038] In one embodiment, the engine efficient heat dissipation device further includes a first pulley 30 and a second pulley 40.

[0039] The first pulley 30 is rotatably arranged on the frame 10, and the first pulley 30 is connected to the crankshaft of the engine. The second pulley 40 is rotatably arranged on the frame 10, the second pulley 40 is coaxially connected to the axial flow fan 20, and the second pulley 40 is connected to the first pulley 30 through a belt drive.

[0040] In this embodiment, when the engine drives the axial flow fan 20 to rotate, part of the power will be lost. However, if the heat dissipation effect of the engine is good, the output power can be increased. By selecting different sizes when installing the first pulley 30 and the second pulley 40, the transmission ratio between the first pulley 30 and the second pulley 40 can be adjusted, so that the increased value of the engine output power due to the improvement of the heat dissipation effect is greater than the power loss value of driving the axial flow fan 20, that is, the increase of the engine output power is realized.

[0041] In one embodiment, it is preferred that the diameter of the second pulley 40 is larger than the diameter of the first pulley 30.

[0042] In this embodiment, through practice, the diameter of the second pulley 40 is larger than the diameter of the first pulley 30, so that the rotational speed of the axial flow fan 20 is lower than the rotational speed of the engine crankshaft, and better heat dissipation effect and engine power improvement effect can be achieved.

[0043] In one embodiment, the projection of the second pulley 40 is located in the middle of the engine. Specifically, when a traditional centrifugal fan is connected to the engine crankshaft, the centrifugal fan is located on the side of the crankcase and at the lower part of the engine. In this heat dissipation device, the position of the second pulley 40 is set above the crankshaft of the engine, corresponding to the middle of the whole engine, that is, the second pulley 40 is located above the first pulley 30, so that the axial flow fan 20 is moved upward as a whole, so that the axial flow fan 20 can adopt a larger size to obtain a larger air supply area to cover the whole engine.

[0044] In one embodiment, the engine efficient heat dissipation device further includes two third pulleys 50. The two third pulleys 50 are located between the first pulley 30 and the second pulley 40. The connection line between the first pulley 30 and the second pulley 40 intersects with the connection line between the two third pulleys 50. Specifically, the connection line between the first pulley 30 and the second pulley 40 and the connection line between the two third pulleys 50 are arranged in a cross shape. The first pulley 30, the second pulley 40 and the two third pulleys 50 are connected by belt drive.

[0045] In this embodiment, the arrangement of the two third pulleys 50 together with the first pulley 30 and the second pulley 40 can make the belt stable during movement and have small vibration, so that the rotation speed of the axial flow fan 20 is stable.

[0046] In one embodiment, the engine efficient heat dissipation device further includes an annular support 60. The annular support 60 is fixedly connected to the frame 10. The surface of the annular support 60 facing the first pulley 30 is a conical surface, and the axis of the annular support 60 coincides with the axis of the first pulley 30.

[0047] In this embodiment, the first pulley 30 faces the crankcase, and the heat dissipation requirement at the crankcase is relatively low. The annular support 60 deflects the air flow blown by the axial flow fan 20 to this place around, so as to further improve the heat dissipation effect of the engine.

[0048] In the specification of the present utility model, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. An engine efficient heat dissipation device, characterized in that, Comprising: A frame (10), connected to the engine; And An axial flow fan (20), rotatably arranged on the frame (10) and driven by the engine crankshaft; The air supply area of the axial flow fan (20) covers the entire engine.

2. The highly efficient engine heat dissipation device according to claim 1, characterized in that, Further comprising: A first pulley (30), rotatably arranged on the frame (10) and connected to the crankshaft of the engine; And A second pulley (40), rotatably arranged on the frame (10), coaxially connected to the axial flow fan (20), and connected to the first pulley (30) through a belt drive.

3. An efficient engine heat dissipation device according to claim 2, characterized in that, The diameter of the second pulley (40) is larger than that of the first pulley (30).

4. The high-efficiency heat dissipation device for an engine according to claim 3, wherein The second pulley (40) is located above the engine crankshaft.

5. An engine efficient heat dissipation device according to any one of claims 2-4, characterized in that, Further comprising two third pulleys (50); the two third pulleys (50) are located between the first pulley (30) and the second pulley (40); the connection line between the first pulley (30) and the second pulley (40) intersects the connection line of the two third pulleys (50); the first pulley (30), the second pulley (40) and the two third pulleys (50) are connected through the belt drive.

6. The high-efficiency heat dissipation device for an engine according to claim 5, characterized in that, Further comprising an annular support member (60); the annular support member (60) is fixedly connected to the frame (10); One surface of the annular support member (60) facing the first pulley (30) is a conical surface, and the axis of the annular support member (60) coincides with the axis of the first pulley (30).

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