An intrusion resistant marine fan

Abstract

The application belongs to the technical field of fans, and particularly relates to an anti-invasion marine fan. The anti-invasion marine fan comprises a fan frame, and a fan blade rotating relative to the fan frame with the fan shaft as the center; the fan blade comprises a blade, a hub, and a rotating ring sleeved on the inner periphery of the hub and coaxial with the hub; the end surface of the hub facing the fan frame is protruded to form a plurality of outer guide vanes, one end of each of the outer guide vanes is connected with the outer periphery of the hub, and the other end of each of the outer guide vanes is connected with the inner periphery of the hub; the end surface of the rotating ring facing the fan frame is protruded to form a plurality of inner guide vanes, one end of each of the inner guide vanes is connected with the outer periphery of the rotating ring, and the other end of each of the inner guide vanes is connected with the inner periphery of the rotating ring; and the outer guide vanes and the inner guide vanes are both arranged in a radial inclination mode relative to the hub. In the application, water, dust and salt can be prevented, the protection of the inside of the fan is improved, the normal operation of the fan is ensured, and the service life is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of fan technology, specifically relating to an intrusion-proof marine fan. Background Technology

[0002] Because the sea surface is open and unobstructed, with long hours of sunshine and reflected light from the water, the development of marine photovoltaic industry to increase power generation and reduce land occupation has become a trend. Among these, the marine photovoltaic industry requires the use of fans to convert electrical energy into mechanical energy.

[0003] The sea is often filled with seawater, salt spray, and dust. When fans operate in such an environment, seawater, salt spray, and dust can penetrate their interiors. In a short period of time, salt spray and dust can enter the bearings. Dust can adhere to the surface of the bearing balls, and salt spray or seawater can crystallize upon contact with the bearings. The fan blades can become stuck due to the dust or salt crystals and be unable to rotate. Over time, seawater, salt spray, and dust entering the fan can corrode other internal fan structures, including the bearings, damaging the fan and reducing its lifespan. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] An intrusion-proof marine fan includes a fan frame and fan blades that rotate relative to the fan frame about a fan shaft.

[0006] The fan blades include blades, a hub, and a rotating ring that is fitted inside the hub and coaxial with the hub.

[0007] The end face of the hub facing the fan frame protrudes to form several outer guide vanes. One end of the outer guide vane is connected to the outer peripheral surface of the hub, and the other end is connected to the inner peripheral surface of the hub.

[0008] The rotating ring protrudes towards the end face of the fan frame to form several inner guide vanes. One end of each inner guide vane is connected to the outer circumferential surface of the rotating ring, and the other end extends towards the inner circumferential surface of the rotating ring.

[0009] Both the outer guide vane and the inner guide vane are radially inclined relative to the hub.

[0010] Specifically, the outer guide vane and the inner guide vane are staggered.

[0011] Specifically, the end of the inner guide vane that connects to the outer circumferential surface of the rotating ring is located between adjacent outer guide vanes.

[0012] Specifically, the outer guide vane and the inner guide vane have different tilt angles relative to the radial direction of the same hub.

[0013] Specifically, the distance between the end face of the rotating ring and the fan frame is smaller than the distance between the end face of the hub and the fan frame.

[0014] Specifically, the rotation directions of some of the outer guide vanes and the rotation directions of some of the inner guide vanes are the same, and the rotation direction of the outer guide vanes is opposite to that of the blades.

[0015] Specifically, a rubber septum is provided on the inner side of the rotating ring, and the rubber septum is fixed on the fan frame.

[0016] Specifically, the lower end of the rotating ring protrudes inward along its radial direction to form an inner ring, and the upper end of the rubber spacer ring protrudes outward along its radial direction to form an outer ring, with the outer ring located above the inner ring.

[0017] Specifically, the surface of the fan frame facing the outer and inner guide vanes is an inclined surface with the inner side higher than the outer side, used for airflow guidance.

[0018] Specifically, the outer guide vane is located between the inclined plane and the hub end face, and the inner guide vane is located between the inclined plane and the rotating ring end face, wherein the distance from the outer guide vane to the inclined plane is equal to the distance from the inner guide vane to the inclined plane.

[0019] The technical solution provided by this invention has the following advantages compared with the prior art:

[0020] 1. The system is equipped with outer and inner guide vanes. When the fan is running, the inner and outer guide vanes rotate accordingly. Water, dust, and salt that enter the gap between the two guide vanes will be swept out of the guide channel by the oblique guide channel wall as the fan blades rotate, preventing intrusion, improving the protection of the fan's interior, extending the service life of the marine fan, and preventing the fan blades from being stuck by sea salt crystals, ensuring the normal operation of the fan.

[0021] 2. The fan frame is designed with a bevel to work with the inner and outer air guide vanes. Water, dust, or salt swept out is guided through the bevel to reduce residue, prevent the accumulation of foreign objects, ensure the air guide channel is unobstructed, and allow the fan to dissipate heat from the inside out. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the anti-intrusion marine fan in this embodiment;

[0023] Figure 2 This is an exploded view of the intrusion-proof marine fan in this embodiment;

[0024] Figure 3 This is an axial cross-sectional view of the intrusion-proof marine fan in this embodiment;

[0025] Figure 4 This is a diagram showing the relative positions of the fan frame and fan blades in this embodiment;

[0026] Figure 5 This is the present invention. Figure 4 Enlarged view of a portion of point A in the middle;

[0027] Figure 6 This is a diagram of the blade structure of the anti-intrusion marine fan in this embodiment.

[0028] The figure shows: 1. Fan frame; 11. Fan outer frame; 12. Fan bottom frame; 121. Shaft hole; 122. Disc; 123. Annular inclined part; 13. Static blade; 2. Copper sleeve; 3. Fan blade; 31. Blade; 32. Hub; 321. Outer guide vane; 33. Rotating ring; 331. Inner ring; 332. Inner guide vane; 4. Fan shaft; 5. Motor; 6. PCB board; 7. Waterproof cover; 8. Glue ring; 81. Outer ring. Detailed Implementation

[0029] For ease of understanding, the following embodiments illustrate the anti-intrusion marine fan. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] See Figures 1 to 2 As shown, the anti-intrusion marine fan in this embodiment includes a fan frame 1. The fan frame 1 includes a fan outer frame 11, a fan bottom frame 12, and stator blades 13. The fan bottom frame 12 is located at the center of the fan outer frame 11. Several stator blades 13 are arranged in a ring between the fan outer frame 11 and the fan bottom frame 12. One end of the stator blade 13 is connected to the fan outer frame 11, and the other end is connected to the fan bottom frame 12. The stator blades 13 rotate to the left.

[0033] See Figure 3 As shown, a shaft hole 121 is provided at the center of the fan base frame 12, and a copper sleeve 2 is fixedly connected in the shaft hole 121.

[0034] See Figure 3 and Figure 6 As shown, the anti-intrusion marine fan in this embodiment also includes fan blades 3. The fan blades 3 include blades 31, hubs 32 and rotating rings 33. The hub 32 is a cylindrical shape with one end closed and the other end open. The rotating ring 33 is fitted on the inner circumference of the open end. The rotating ring 33 is fixedly connected to the hub 32. Several blades 31 are arranged around the outer circumference of the hub 32. The blades 31 are integrally formed with the hub 32 and the blades 31 rotate to the right. A fan shaft 4 is fixedly connected inside the hub 32. The fan shaft 4, fan blades 3 and fan frame 1 are coaxial, so the rotating ring 33 and hub 32 are coaxial.

[0035] See Figure 3 The fan shaft 4 is inserted into the copper sleeve 2 from top to bottom, and the copper sleeve 2 is rotated and connected by double bearings. After the fan shaft 4 and the copper sleeve 2 are inserted, the fan base frame 12 and the hub 32 are overlapped axially. A motor 5 is installed between the copper sleeve 2 and the hub 32. Driven by the motor 5, the fan blade 3 can rotate relative to the fan frame 1 with the fan shaft 4 as the center.

[0036] Continue reading Figures 2 to 3 The fan base frame 12 has a first side and a second side that are arranged opposite to each other. A PCB board 6 is mounted on the first side, and a waterproof cover 7 is fastened after the PCB board 6 is mounted.

[0037] See Figures 3 to 4 The second side of the fan base frame 12 faces the fan blade 3. A disc 122 is formed by a central protrusion on the second side. The disc 122 is used to fix and install the motor 5. The edge of the second side has an annular inclined portion 123. The annular inclined portion 123 is higher on the inside and lower on the outside. That is, the part located outside the disc 122 is an inclined surface. The height of the inclined surface gradually decreases as it moves away from the axis, which is conducive to dust removal, drainage or salt removal.

[0038] See Figures 3 to 5 An annular rubber sealant ring 8 is fixedly connected to the outer wall of the disc 122. The upper end of the rubber sealant ring 8 protrudes outward along its radial direction to form an outer ring 81. The outer ring 81 gradually moves away from the radial direction and its thickness gradually decreases. The upper end surface of the outer ring 81 is horizontal, that is, the lower surface of the outer ring 81 is a slope, which can prevent foreign objects or water from crossing the slope. The lower end of the rotating ring 33 protrudes inward along its radial direction to form an inner ring 331. The outer ring 81 is located above the inner ring 331. The inner ring 331 and the outer ring 81 cooperate with each other. The flow channel between the rubber sealant ring 8 and the rotating ring 33 is bent, which improves the functions of waterproofing, dustproofing and saltproofing.

[0039] Continue reading Figure 5The rubber septum 8 is located inside the rotating ring 33, preventing seawater and dust from entering the fan. The lower end face of the rubber septum 8 contacts the annular inclined part 123. There is a gap between the lower end face of the rotating ring 33 and the fan frame 1. The gap between the end face of the rotating ring 33 and the fan frame 1 is smaller than the gap between the lower end face of the hub 32 and the fan frame 1. That is to say, from the outside to the inside, the lower end face of the hub 32 is higher than the lower end face of the rotating ring 33, and the lower end face of the rotating ring 33 is higher than the lower end face of the rubber septum 8, forming a progression in height.

[0040] See Figure 5 and Figure 6 The rotating ring 33 protrudes towards the end face of the fan frame 1 to form a plurality of inner guide vanes 332. The inner guide vanes 332 rotate to the left. One end of the inner guide vane 332 is connected to the outer peripheral surface of the rotating ring 33, and the other end extends towards the inner peripheral surface of the rotating ring 33. Preferably, this end is connected to the inner peripheral surface of the rotating ring 33, and an inner guide groove is formed between adjacent inner guide vanes 332.

[0041] See Figure 5 and Figure 6 The hub 32 protrudes towards the end face of the fan frame 1 to form several outer guide vanes 321. The outer guide vanes 321 rotate to the left. The outer guide vanes 321, the inner guide vanes 332 and the stator vanes 13 rotate in the same direction, and all three rotate in the opposite direction to the blades 31. One end of the outer guide vane 321 is connected to the outer circumferential surface of the hub 32, and the other end is connected to the inner circumferential surface of the hub 32. An outer guide groove is formed between adjacent outer guide vanes 321.

[0042] See Figure 6 The outer guide vane 321 and the inner guide vane 332 are staggered. Specifically, the end of the inner guide vane 332 connected to the outer circumference of the rotating ring 33 is located between the adjacent outer guide vane 321. The groove diameter is refined. When the fan blade 3 rotates at high speed, foreign objects and water will pass through the groove opening at high speed under the action of centrifugal force, thereby achieving the flow obstruction effect.

[0043] See Figure 4 and Figure 5 The outer guide vane 321 is located between the annular inclined portion 123 and the end face of the hub 32, and the inner guide vane 332 is located between the annular inclined portion 123 and the rotating ring 33. The distance between the outer guide vane 321 and the annular inclined portion 123 is equal to the distance between the inner guide vane 332 and the annular inclined portion 123. Together with the annular inclined portion 123, they form a structure with a deep outer guide groove and a shallow inner guide groove, which prevents salt crystallization from crossing the inner guide groove and also prevents the fan blade 3 from being stuck by salt.

[0044] Continue reading Figure 5 and Figure 6Both the outer guide vane 321 and the inner guide vane 332 are radially inclined relative to the hub 32. In this embodiment, the inclination angles of the outer guide vane 321 and the inner guide vane 332 relative to the same hub 32 are not equal. Among them, the intersection point A of the chord line of the outer guide vane 321 and the outer peripheral surface of the hub 32 is taken as point A. A tangent line is drawn through point A to the outer peripheral surface of the hub 32, and the angle between the tangent line and the chord line of the outer guide vane 321 is α. The intersection point B of the chord line of the inner guide vane 332 and the outer peripheral surface of the rotating ring 33 is taken as point B. A tangent line is drawn through point B to the outer peripheral surface of the rotating ring 33, and the angle between the tangent line and the chord line of the inner guide vane 332 is β. If both α and β are acute angles, then α > β. This arrangement can prevent salt water and makes it less likely for salt crystals to remain.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intrusion-proof marine fan, characterized in that, Includes a fan frame and fan blades capable of rotating relative to the fan frame; The fan blades include blades, a hub, and a rotating ring that is fitted inside the hub and coaxial with the hub. The end face of the hub facing the fan frame protrudes to form several outer guide vanes. One end of the outer guide vane is connected to the outer peripheral surface of the hub, and the other end is connected to the inner peripheral surface of the hub. The rotating ring protrudes towards the end face of the fan frame to form several inner guide vanes. One end of each inner guide vane is connected to the outer circumferential surface of the rotating ring, and the other end extends towards the inner circumferential surface of the rotating ring. Both the outer guide vane and the inner guide vane are radially inclined relative to the hub, and the outer guide vane and the inner guide vane are staggered. A rubber septum is provided on the inner side of the rotating ring, and the rubber septum is fixed on the fan frame; the lower end of the rotating ring protrudes inward along its radial direction to form an inner ring, and the upper end of the rubber septum protrudes outward along its radial direction to form an outer ring, and the outer ring is located above the inner ring.

2. The anti-intrusion marine fan as described in claim 1, characterized in that, The end of the inner guide vane that connects to the outer circumference of the rotating ring is located between adjacent outer guide vanes.

3. The anti-intrusion marine fan as described in claim 1, characterized in that, The outer guide vane and the inner guide vane have different tilt angles relative to the radial direction of the same hub.

4. The anti-intrusion marine fan as described in claim 1, characterized in that, The distance between the end face of the rotating ring and the fan frame is less than the distance between the end face of the hub and the fan frame.

5. An intrusion-proof marine fan as described in claim 1, characterized in that, The rotation directions of some of the outer guide vanes and some of the inner guide vanes are the same, and the rotation direction of the outer guide vanes is opposite to that of the blades.

6. An intrusion-proof marine fan as described in claim 1, characterized in that, The surface of the fan frame facing the outer and inner guide vanes is an inclined surface with the inner side higher than the outer side, used for airflow guidance.

7. An intrusion-proof marine fan as described in claim 6, characterized in that, The outer guide vane is located between the inclined plane and the hub end face, and the inner guide vane is located between the inclined plane and the rotating ring end face, wherein the distance from the outer guide vane to the inclined plane is equal to the distance from the inner guide vane to the inclined plane.

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