Engine heat dissipation air duct carried on variable frequency generator

Abstract

The utility model discloses an engine heat dissipation air duct carried on a variable frequency generator, which comprises an impeller, an exhaust upper side heat dissipation fin, an exhaust lower side heat dissipation fin, a box body cylinder sleeve heat dissipation fin, a first air guide block and a second air guide block, the first air guide block is arranged on the large starting cover, located below an engine air inlet, flush with the engine air inlet and capable of dividing air flow up and down, so that the upward air flow faces the exhaust upper side cooling fins, and the downward air flow faces the exhaust lower side cooling fins. The second air guide block is arranged on the silencer partition plate and can guide air flow blown out of the box body cylinder sleeve cooling fins upwards to be blown to the cylinder head. Upward air flow is guided to a spark plug and blown to a cylinder head exhaust cooling fin and a cooling exhaust upper side cooling fin, downward air flow blows through the top of a combustion chamber and cools the top of the combustion chamber and the exhaust lower side cooling fin, and it is avoided that the air flow is scattered all around to form vortexes and is difficult to exhaust. Air flow blown out by the box body cylinder sleeve cooling fins is guided to the direction of the cylinder head, so that the air flow blows the box body cooling fins in a concentrated mode.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and particularly relates to an engine cooling air duct mounted on a variable-frequency generator. Background Art

[0002] A variable-frequency generator is a generator that can change the output frequency. When it works, the engine runs at a high speed, which helps to reduce the weight and volume. In the operation of a variable-frequency generator, a cooling air duct is essential. By guiding and controlling the air flow, it effectively discharges the heat generated inside the device, thereby reducing the device temperature, ensuring its stable operation and extending its service life. The cooling air duct enables the hot air to flow smoothly through a reasonable air flow path and exchange heat with the outside cold air, thus achieving the cooling effect. However, the existing cooling air duct lacks the guidance of the air flow, making it easy for the air flow to form eddies inside the variable-frequency engine and difficult to discharge, which greatly affects the cooling effect, and it is also difficult for the air flow to enter the lower part of the variable-frequency engine for cooling. Content of the Utility Model

[0003] Aiming at the defects existing in the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an engine cooling air duct that can guide the air flow and avoid the disorder of the air flow, thereby affecting the cooling effect.

[0004] To solve the above technical problem, the utility model adopts the following technical scheme: An engine cooling air duct mounted on a variable-frequency generator includes an impeller, upper exhaust heat dissipation fins, lower exhaust heat dissipation fins, and cylinder block heat dissipation fins of the box body, and further includes a first air guiding block and a second air guiding block. The first air guiding block is arranged on the starting large cover and below the engine air inlet, and can divide the air flow into upper and lower parts, so that the upward air flow goes to the upper exhaust heat dissipation fins, and the downward air flow goes to the lower exhaust heat dissipation fins; the second air guiding block is arranged on the muffler partition between the cylinder block heat dissipation fins of the box body and the muffler outer cover, and can guide the air flow blown out by the cylinder block heat dissipation fins of the box body upward to the cylinder head.

[0005] Preferably, the widths of the upper exhaust heat dissipation fins decrease step by step from top to bottom, which can lighten the weight of the variable-frequency engine.

[0006] Preferably, the first air guiding block and the starting large cover are integrally formed.

[0007] Preferably, the second air guiding block and the muffler partition are integrally formed.

[0008] Preferably, the second air guiding block is inclined upward toward the muffler outer cover.

[0009] Preferably, the upper end of the second air guiding block extends to the upper middle part of the cylinder block heat dissipation fins of the box body.

[0010] The beneficial effects of the utility model are as follows: by arranging a first air guide block on the starting hood, the wind flow can be divided up and down, the upward wind flow is directed to the spark plug and blown to the cylinder head exhaust heat sink to cool the upper exhaust heat sink, the downward wind flow blows through the top of the combustion chamber to cool the top of the combustion chamber and the lower exhaust heat sink, in order to prevent the wind flow from scattering to form vortices that are difficult to discharge, the second air guide block arranged on the muffler baffle is used to guide the wind flow blown out from the box cylinder liner heat sink to the cylinder head direction, so that the wind flow blows the box heat sink in a concentrated manner, the cooling effect is good, and the wind flow will not run around between the engine and the muffler, thereby affecting the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view of the engine;

[0012] Figure 2 for Figure 1 LL profile of;

[0013] Figure 3 It is the right view of the variable frequency generator;

[0014] Figure 4 for Figure 3 MM cross-section diagram;

[0015] Figure 5 for Figure 3 NN profile diagram;

[0016] Figure 6 for Figure 3 PP cross-section diagram;

[0017] In the figure: 1-impeller, 2-starting cover, 3-box, 4-engine base plate, 5-crankcase cover, 6-muffler baffle, 7-muffler cover, 8-first air guide block, 9-engine air intake, 10-second air guide block, 11-exhaust upper side heat sink, 12-combustion chamber top, 13-exhaust lower side heat sink, 14-box cylinder liner heat sink. DETAILED DESCRIPTION

[0018] In order to better understand the improvements made by the present invention relative to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] like Figure 1As shown in FIGS. 1-6, an engine cooling air duct mounted on a variable-frequency generator mainly consists of an impeller 1, an upper exhaust heat sink 11, a lower exhaust heat sink 13, and a cylinder liner heat sink 14 of the box body. First air guiding blocks 8 and second air guiding blocks 10 are respectively provided on a starting large cover 2 and a muffler partition 6 between the cylinder liner heat sink 14 of the box body and an outer cover 7 of the muffler, and are all integrally formed, making the connection more reliable and the overall force-bearing better.

[0020] The first air guiding block 8 is arranged on the starting large cover 2 and is located below and flush with an engine air inlet 9, and can shunt the air flow up and down, so that the upward air flow goes to the upper exhaust heat sink 11, and the downward air flow goes to the lower exhaust heat sink 13.

[0021] The width of the cylinder liner heat sink 14 of the box body decreases step by step from top to bottom, which can make the engine lighter. The second air guiding block 10 inclines from bottom to top towards the side of the outer cover 7 of the muffler. Preferably, the second air guiding block 10 is parallel to the hypotenuse of the cylinder liner heat sink 14 of the box body and the upper end of the second air guiding block 10 extends to the middle and upper part of the cylinder liner heat sink 14, and can better guide the air flow blown out by the cylinder liner heat sink 14 of the box body upwards to the cylinder head.

[0022] When the starting large cover 2 guides the cooling air to the bottom of the box body 3, the cooling air passes through the air duct formed by the starting large cover 2 and an engine bottom plate 4, and fully takes away the heat accumulated at the bottom of the box body 3 to achieve the purpose of reducing the engine oil temperature. The first air guiding block 8 on the starting large cover 2 divides the air inlet of the cylinder head into upper and lower parts. The upper part of the air is guided by the first air guiding block 8 to the spark plug and blows the air towards the exhaust heat sink of the cylinder head, mainly cooling the upper exhaust heat sink 11. The lower part of the air is guided by the first air guiding block 8 to blow over the top 12 of the combustion chamber, mainly cooling the top 12 of the combustion chamber and the lower exhaust heat sink 13.

[0023] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An engine cooling air duct mounted on a variable frequency generator, comprising an impeller (1), an exhaust upper side cooling fin (11), an exhaust lower side cooling fin (13) and a casing cylinder liner cooling fin (14), characterized in that: The invention also comprises a first air guide block (8) and a second air guide block (10), wherein the first air guide block (8) is arranged on the starting cover (2) and is located below the engine air inlet (9), and can divide the airflow upward and downward, so that the upward airflow flows to the upper exhaust heat sink (11), and the downward airflow flows to the lower exhaust heat sink (13); the second air guide block (10) is arranged on the muffler partition (6) between the box cylinder liner heat sink (14) and the muffler outer cover (7), and can guide the airflow blown out of the box cylinder liner heat sink (14) upward to the cylinder head.

2. The engine cooling air duct mounted on a variable frequency generator according to claim 1, characterized in that: The width of the cooling fins (14) of the cylinder liner of the housing decreases from top to bottom in a stepped distribution, which can make the engine lighter.

3. The engine cooling air duct mounted on a variable frequency generator according to claim 1, characterized in that: The first air guide block (8) and the starting large cover (2) are manufactured by integral molding.

4. The engine cooling air duct mounted on a variable frequency generator according to claim 1, characterized in that: The second air guide block (10) and the muffler partition plate (6) are manufactured by integral molding.

5. The engine cooling air duct mounted on a variable frequency generator according to claim 1, characterized in that: The second air guide block (10) is inclined from bottom to top toward the muffler outer cover (7).

6. The engine cooling air duct mounted on a variable frequency generator according to claim 1, characterized in that: The upper end of the second air guide block (10) extends to the upper middle portion of the cylinder liner cooling fin (14) of the casing.

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