Engine fan structure with two stages of fans

Abstract

The utility model relates to the technical field of engine fan structures, in particular to an engine fan structure with a two-stage fan, which comprises an electric control silicone oil clutch component, the two-stage fan comprises a first reinforcing ring and a plurality of second-stage fan blades, and the second-stage fan blades are annularly arranged on the surface of the first reinforcing ring. Nuts are rotationally connected to the surfaces of the rear sides of the multiple secondary fan blades, multiple studs are annularly arranged on the front surface of the electric control silicone oil clutch component, and an additional fan assembly is arranged on the inner wall of the first reinforcing ring. According to the additional fan assembly provided by the utility model, a plurality of additional fan blades are arranged to make up the area without fan blades in the middle of the secondary fan, so that the air flowability at the area is improved; the secondary fan is not provided with a connecting disc and is connected only through a nut and a stud, the ventilation space is increased, and heat dissipation of the electronic control silicone oil clutch component is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of engine fan structure technology, and in particular to an engine fan structure with a two-stage fan. Background Technology

[0002] The cooling fan is an important component of the engine cooling system. To ensure the normal operation of the engine, various requirements are put forward for the fan design: the fan must provide sufficient air volume, consume little power, have a compact structure, small size, and low noise. Therefore, the rationality of the fan structure design plays a crucial role in the effective operation of the engine.

[0003] For example, the application publication number "CN108661925A" is titled "An Engine Fan Structure with Two-Stage Fans". By adding a second-stage fan, the airflow in the bladeless area in the middle of the first-stage fan is improved, thereby increasing the air volume and improving the cooling capacity.

[0004] The above-mentioned and existing technologies have the following defects: there is still a bladeless area in the middle of the secondary fan of the engine fan structure, where the air flow is poor; the secondary fan is installed on the electronically controlled silicone oil clutch component through a connecting plate, and the connecting plate covers the electronically controlled silicone oil clutch component, which is not conducive to the heat dissipation of the electronically controlled silicone oil clutch component. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an engine fan structure with a two-stage fan.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an engine fan structure with a two-stage fan, including an electronically controlled silicone oil clutch component. The rear surface of the electronically controlled silicone oil clutch component is provided with a first-stage fan. The front surface of the electronically controlled silicone oil clutch component is coaxially provided with a second-stage fan. The second-stage fan includes a first reinforcing ring and multiple second-stage fan blades. The multiple second-stage fan blades are arranged in a ring on the surface of the first reinforcing ring. Nuts are rotatably connected to the rear surfaces of the multiple second-stage fan blades. Multiple studs are arranged in a ring on the front surface of the electronically controlled silicone oil clutch component. The multiple studs correspond one-to-one with the multiple nuts. The studs and nuts are threadedly connected. An additional fan assembly is provided on the inner wall of the first reinforcing ring.

[0008] The additional fan assembly includes additional fan blades, and a plurality of the additional fan blades are evenly arranged in a ring on the surface of the first reinforcing ring.

[0009] The inner walls of the multiple additional fan blades are provided with a second reinforcing ring.

[0010] Each of the secondary fan blades has a fan blade near the first reinforcing ring on its front surface.

[0011] The rear surface of each of the secondary fan blades is provided with reinforcing ribs.

[0012] Each of the secondary fan blades has a connecting seat on its rear surface, each of the connecting seats has a rotating groove inside, each of the rotating grooves has a rotating block rotatably connected inside, and each of the rotating blocks has a connecting post on its rear surface. The rear end of the connecting post slides through one side of the inner wall of the rotating groove and connects to the front surface of the nut.

[0013] The present invention proposes an engine fan structure with a two-stage fan, which has the following advantages: the second-stage fan is fixed by threaded connection of a nut and a stud, and then by tightening the nut. This fixing method is very convenient and quick. The additional fan assembly, with multiple additional fan blades, compensates for the area without fan blades in the middle of the second-stage fan, increasing airflow in this area. The second-stage fan is not equipped with a connecting plate, but is only connected by a nut and a stud, which increases the ventilation space and is beneficial for the heat dissipation of the electronically controlled silicone oil clutch components. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is an enlarged view of position A in this utility model;

[0017] Figure 4 This is an enlarged view of position B of this utility model.

[0018] In the diagram: 1. Electro-controlled silicone oil clutch component; 2. Primary fan; 3. Secondary fan; 4. First reinforcing ring; 5. Secondary fan blade; 6. Nut; 7. Stud; 8. Additional fan blade; 9. Fan wing; 10. Reinforcing rib; 11. Connecting seat; 12. Rotating groove; 13. Rotating block; 14. Connecting column; 15. Second reinforcing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-4An engine fan structure with a two-stage fan includes an electronically controlled silicone oil clutch component 1. A first-stage fan 2 is provided on the rear surface of the electronically controlled silicone oil clutch component 1. A second-stage fan 3 is coaxially provided on the front surface of the electronically controlled silicone oil clutch component 1 and the first-stage fan 2. The second-stage fan 3 includes a first reinforcing ring 4 and multiple second-stage fan blades 5. The multiple second-stage fan blades 5 are arranged in a ring on the surface of the first reinforcing ring 4. Nuts 6 are rotatably connected to the rear surfaces of the multiple second-stage fan blades 5. Multiple studs 7 are arranged in a ring on the front surface of the electronically controlled silicone oil clutch component 1. The multiple studs 7 correspond one-to-one with the multiple nuts 6. The studs 7 and nuts 6 are threadedly connected. An additional fan assembly is provided on the inner wall of the first reinforcing ring 4.

[0021] The additional fan assembly includes additional fan blades 8, with multiple additional fan blades 8 evenly arranged in a ring on the surface of the first reinforcing ring 4.

[0022] The inner walls of multiple additional fan blades 8 are provided with a second reinforcing ring 15. The second reinforcing ring 15 connects the multiple additional fan blades 8 into a whole, increasing the strength of the multiple additional fan blades 8.

[0023] Each of the multiple secondary fan blades 5 has a fan blade 9 near the first reinforcing ring 4 on its front surface. The fan blades 9 can generate airflow to compensate for the weak airflow in the middle of the multiple secondary fan blades 5.

[0024] Reinforcing ribs 10 are provided on the rear surface of multiple secondary fan blades 5. The reinforcing ribs 10 increase the strength of the secondary fan blades 5.

[0025] Each of the secondary fan blades 5 has a connecting seat 11 on its rear surface. Each connecting seat 11 has a rotating groove 12 inside, and a rotating block 13 is rotatably connected inside each rotating groove 12. Each rotating block 13 has a connecting post 14 on its rear surface. The rear end of the connecting post 14 slides through one inner wall of the rotating groove 12 and connects to the front surface of the nut 6. In this way, the individual nut 6 can rotate relative to the secondary fan blade 5, causing the nut 6 to be threadedly connected to the connecting post 14, thus fixing the multiple secondary fan blades 5.

[0026] Working principle: The secondary fan 3 is fixed by screwing the nut 6 and the stud 7 together. This fixing method is very convenient and quick. The additional fan assembly, with multiple additional fan blades 8, fills the area in the middle of the secondary fan 3 where there are no fan blades, increasing the airflow in this area. The secondary fan 3 is not equipped with a connecting plate, but is only connected by the nut 6 and the stud 7, which increases the ventilation space and is beneficial to the heat dissipation of the electronic control silicone oil clutch component 1.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An engine fan structure with a two-stage fan, comprising an electronically controlled silicone oil clutch component (1), characterized in that, The rear surface of the electro-controlled silicone oil clutch component (1) is provided with a primary fan (2), and the front surface of the electro-controlled silicone oil clutch component (1) is coaxially provided with a secondary fan (3) and the primary fan (2). The secondary fan (3) includes a first reinforcing ring (4) and multiple secondary fan blades (5). The multiple secondary fan blades (5) are arranged in a ring on the surface of the first reinforcing ring (4). Nuts (6) are rotatably connected to the rear surface of the multiple secondary fan blades (5). Multiple studs (7) are arranged in a ring on the front surface of the electro-controlled silicone oil clutch component (1). The multiple studs (7) correspond one-to-one with the multiple nuts (6). The studs (7) and nuts (6) are threadedly connected. An additional fan assembly is provided on the inner wall of the first reinforcing ring (4).

2. The engine fan structure with a two-stage fan according to claim 1, characterized in that, The additional fan assembly includes additional fan blades (8), and a plurality of the additional fan blades (8) are evenly arranged in a ring on the surface of the first reinforcing ring (4).

3. The engine fan structure with a two-stage fan according to claim 2, characterized in that, The inner walls of the multiple additional fan blades (8) are provided with a second reinforcing ring (15).

4. The engine fan structure with a two-stage fan according to claim 1, characterized in that, Each of the secondary fan blades (5) has a fan wing (9) near the first reinforcing ring (4) on its front surface.

5. The engine fan structure with a two-stage fan according to claim 1, characterized in that, The rear surface of each of the secondary fan blades (5) is provided with reinforcing ribs (10).

6. The engine fan structure with a two-stage fan according to claim 1, characterized in that, Each of the secondary fan blades (5) has a connecting seat (11) on its rear surface. Each of the connecting seats (11) has a rotating groove (12) inside. Each of the rotating grooves (12) has a rotating block (13) rotatably connected inside. Each of the rotating blocks (13) has a connecting post (14) on its rear surface. The rear end of the connecting post (14) slides through the inner wall of one side of the rotating groove (12) and connects to the front surface of the nut (6).

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