Anti-oil-throwing cooling fan
By incorporating a sealed cavity and multi-stage oil-blocking units within the cooling fan, the pollution problem caused by lubricating oil splashing is solved, achieving an anti-splashing effect and ensuring the equipment's insulation performance and operational stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-14
AI Technical Summary
When existing cooling fans operate at high speeds, the lubricating oil at the shaft will be splashed out, causing contamination of internal components, affecting insulation performance, and causing short circuit faults.
An anti-oil-slinging cooling fan is designed. A sealed cavity is formed by setting a first connecting sleeve and a second connecting sleeve. Combined with a first oil-blocking unit and a second oil-blocking unit, including elastic baffles and oil baffles, it prevents lubricating oil from being slinged out and collects lubricating oil through an oil collection tank, forming a multi-level protection.
It effectively prevents lubricating oil from being thrown out axially or radially, avoids the formation of oil mist or oil droplets, protects the insulation performance of equipment, reduces the risk of short circuit faults, and improves the reliability and safety of equipment.
Smart Images
Figure CN224120387U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cooling fan technology, and in particular relates to a cooling fan that prevents oil splattering. Background Technology
[0002] Currently, due to the development and widespread use of computer / electronic equipment, cooling fans are a common heat dissipation device used in such products to quickly remove heat generated by electronic, motor components or other equipment, thereby achieving the purpose of heat dissipation and cooling, and ensuring the efficiency, quality and lifespan of the product.
[0003] Traditional cooling fans require periodic lubrication at the bearing-shaft connection to prevent prolonged rotation without lubrication. Lubrication reduces friction and wear. However, under high-speed operation, the lubricating oil inside the shaft is flung out axially or radially by centrifugal force, forming "oil mist" or "oil droplets." This contaminates the winding frame, circuit board, and magnetic materials, leading to decreased insulation performance and even short-circuit faults. Utility Model Content
[0004] The purpose of this utility model is to provide an oil-slinging cooling fan, which aims to solve the technical problem that existing cooling fans will sling out lubricating oil from their shafts when running at high speeds, causing contamination of other components inside the cooling fan.
[0005] To achieve the above objectives, this utility model provides an oil-resistant cooling fan, comprising a fan frame, fan blades, and a first filter screen; the fan frame has an upwardly protruding bearing seat in the center; the fan blades are disposed on the bearing seat, and the fan blades are detachably connected to the bearing seat; the first filter screen is detachably connected to one side of the fan frame;
[0006] The fan blade is provided with a first connecting sleeve; a second connecting sleeve is provided between the fan blade and the bearing seat; the first connecting sleeve and the second connecting sleeve are tightly connected to form a sealed cavity to prevent lubricating oil from being thrown out.
[0007] The first connecting sleeve is provided with a first oil-blocking unit for preventing lubricating oil from splashing out; the second connecting sleeve is provided with a second oil-blocking unit for lubricating oil splashing out and collecting; the bottom end of the fan frame is provided with a connecting seat, and the connecting seat is provided with an oil collection tank for lubricating oil recovery, and the oil collection tank is connected to the second oil-blocking unit.
[0008] As further explained, the first oil-blocking unit includes a sleeve ring fixed to the top of the inside of the fan blade; an outwardly extending elastic baffle is provided on the outside of the sleeve ring.
[0009] As further explained, the second oil baffle unit includes an oil baffle plate; the oil baffle plate is disposed at the top of the second connecting sleeve and located below the elastic baffle plate, and when the first connecting sleeve and the second connecting sleeve are tightly connected, the outer end of the elastic baffle plate abuts against the top of the oil baffle plate.
[0010] As further explained, the top of the second connecting sleeve is provided with an upwardly protruding blocking part; the blocking part is integrally formed with the second connecting sleeve to form a serrated structure; the serrated structure is provided with a sealing layer for preventing lubricating oil leakage.
[0011] As further explained, the inner wall of the second connecting sleeve is provided with multiple sets of inwardly recessed annular grooves, and the multiple sets of annular grooves are distributed at equal intervals on the inner wall of the second connecting sleeve; the multiple sets of annular grooves are provided with interconnected oil-draining grooves.
[0012] As a further explanation, the grease trap is tapered and inclined along the direction of lubricating oil flow.
[0013] As further explained, the inner wall of the second connecting sleeve is provided with an oleophobic coating; the oleophobic coating is made of polyacrylamide material.
[0014] As a further explanation, the fan frame is provided with an oil drain hole that communicates with the oil vent groove; the oil drain hole is located on the oil collection tank and communicates with the oil collection tank.
[0015] As further explained, a second filter screen is provided at the top of the oil collection tank, and the second filter screen is connected to the oil collection tank by screws.
[0016] As further explained, a fixing structure is provided between the connecting seat and the oil collection tank; the fixing structure includes a mounting hole provided in the connecting seat, and a movably connected limiting block is provided in the mounting hole; a spring is provided between the limiting block and the mounting hole; the top of the limiting block is provided with an arc portion, which can be engaged with or moved away from the outer wall of the oil collection tank; the oil collection tank and the connecting seat are connected by screws.
[0017] The oil-slinging cooling fan provided in this embodiment of the present invention has at least one of the following technical effects: By setting a first connecting sleeve and a second connecting sleeve, which are tightly connected, a sealed cavity is formed to prevent lubricating oil from being thrown out. This seals the lubricating oil within a specific space, fundamentally preventing the lubricating oil from being thrown out axially or radially due to centrifugal force, thus avoiding the formation of "oil mist" or "oil droplets." Simultaneously, by setting a first oil-blocking unit and a second oil-blocking unit, the elastic baffle of the first oil-blocking unit abuts against the top of the oil-blocking plate of the second oil-blocking unit when the first connecting sleeve and the second connecting sleeve are tightly connected, further blocking lubricating oil splashing out, forming multi-level protection, and greatly improving the oil-slinging prevention effect. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of the anti-oil-spinning cooling fan provided in an embodiment of the present utility model.
[0020] Figure 2 This is a schematic diagram of the internal structure of the anti-oil-spinning cooling fan provided in an embodiment of the present utility model.
[0021] Figure 3 for Figure 2 An enlarged diagram of A in the diagram.
[0022] Figure 4 This is a schematic diagram of the structure of the second connecting sleeve provided in an embodiment of the present utility model.
[0023] The following are the labeling elements in the figure:
[0024] 10. Sector frame; 11. Bearing housing; 12. Second connecting sleeve; 131. Connecting ring; 132. Elastic baffle; 14. Oil drain hole;
[0025] 20. Fan blade; 21. First connecting sleeve; 211. Blocking part; 212. Annular groove; 213. Oil-repellent groove; 22. Oil baffle plate; 23. Sealing layer; 24. Oil-repellent coating;
[0026] 30. First filter screen;
[0027] 40. Connecting seat; 41. Oil collection tank; 42. Second filter screen; 431. Spring; 432. Limit block. Detailed Implementation
[0028] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and 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 utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0032] In one embodiment of this utility model, such as Figures 1-4 As shown, an oil-slinging cooling fan is provided, including a fan frame 10, fan blades 20, and a first filter 30. The fan frame 10 has an upwardly protruding bearing seat 11 at its center. The fan blades 20 are mounted on the bearing seat 11, and the fan blades 20 and the bearing seat 11 are detachably connected. The first filter 30 is detachably connected to one side of the fan frame 10.
[0033] A first connecting sleeve 21 is provided inside the fan blade 20. A second connecting sleeve 12 is provided between the fan blade 20 and the bearing housing 11. The first connecting sleeve 21 and the second connecting sleeve 12 are tightly connected to form a sealed cavity to prevent lubricating oil from being thrown out.
[0034] The first connecting sleeve 21 is equipped with a first oil-blocking unit to prevent lubricating oil from splashing out. The second connecting sleeve 12 is equipped with a second oil-blocking unit for lubricating oil splashing out and collecting. The bottom end of the fan frame 10 is equipped with a connecting seat 40, and an oil collection tank 41 for lubricating oil recovery is disposed inside the connecting seat 40. The oil collection tank 41 is connected to the second oil-blocking unit.
[0035] By setting up a first connecting sleeve 21 and a second connecting sleeve 12, which are tightly connected, a sealed cavity is formed to prevent lubricating oil from being thrown out. This seals the lubricating oil within a specific space, fundamentally preventing it from being thrown out axially or radially due to centrifugal force, thus avoiding the formation of "oil mist" or "oil droplets." Simultaneously, by setting up a first oil-blocking unit and a second oil-blocking unit, the elastic baffle 132 of the first oil-blocking unit, when the first connecting sleeve 21 and the second connecting sleeve 12 are tightly connected, abuts against the top of the oil-blocking plate 22 of the second oil-blocking unit, further blocking lubricating oil splashing out. This multi-level protection greatly improves the anti-oil-throwing effect.
[0036] Preferably, the first oil-blocking unit includes a sleeve ring 131 fixed to the inner top end of the fan blade 20. An outwardly extending elastic baffle 132 is provided on the outer side of the sleeve ring 131. The elastic baffle 132 can be made of materials such as polyphenylene sulfide or polyetheretherketone. By providing the elastic baffle 132, when lubricating oil tends to splash outward, the elastic baffle 132 blocks the lubricating oil, enhancing the anti-splashing effect, preventing lubricating oil from contaminating internal components of the equipment, and ensuring the insulation performance and operational stability of the equipment.
[0037] Furthermore, the second oil-blocking unit includes an oil-blocking plate 22. The oil-blocking plate 22 is located at the top of the second connecting sleeve 12 and below the elastic baffle 132. When the first connecting sleeve 21 and the second connecting sleeve 12 are tightly connected, the outer end of the elastic baffle 132 abuts against the top of the oil-blocking plate 22. By setting up the second oil-blocking unit, the oil-blocking plate 22 and the elastic baffle 132 cooperate to form a multi-stage blocking structure. When lubricating oil tends to splash, the elastic baffle 132 can initially block it, while the oil-blocking plate 22 further blocks it, greatly enhancing the anti-splashing effect and further preventing lubricating oil from contaminating internal components of the equipment, thus ensuring the insulation performance and operational stability of the equipment.
[0038] Preferably, the second connecting sleeve 12 has an upwardly protruding blocking portion 211 at its top end. The blocking portion 211 is integrally formed with the second connecting sleeve 12 to form a serrated structure. The serrated structure has a sealing layer 23 for preventing lubricating oil leakage, and the sealing layer 23 is made of rubber material. By setting the serrated structure, the sealing effect at the connection between the first connecting sleeve 21 and the second connecting sleeve 12 is increased. At the same time, by setting the sealing layer 23, the sealing performance is further improved, effectively preventing lubricating oil from leaking from the connection, preventing it from contaminating the winding frame, circuit board and magnetic materials, ensuring the insulation performance of the equipment, and reducing the possibility of short circuit faults.
[0039] Preferably, the inner wall of the second connecting sleeve 12 is provided with multiple sets of inwardly recessed annular grooves 212, which are evenly distributed on the inner wall of the second connecting sleeve 12. Oil-draining grooves 213 are provided between the multiple sets of annular grooves 212. By setting the annular grooves 212 and the oil-draining grooves 213, an orderly flow channel is provided for the lubricating oil. When a small amount of lubricating oil attempts to overflow due to special circumstances, it can flow along the annular grooves 212 and the oil-draining grooves 213, avoiding the lubricating oil from flowing randomly and forming "oil mist" or "oil droplets." This reduces the contamination of the winding frame, circuit board, and magnetic materials by the lubricating oil, ensuring the insulation performance and safe operation of the equipment.
[0040] Furthermore, the grease trap 213 is tapered and inclined along the direction of lubricant flow. This tapered and inclined design of the grease trap 213 allows the lubricant to flow more smoothly along the predetermined direction, preventing the lubricant from coming into contact with other parts of the second connecting sleeve 12 and thus avoiding lubricant leakage.
[0041] Furthermore, an oleophobic coating 24 is provided on the inner wall of the second connecting sleeve 12. The oleophobic coating 24 is made of polyacrylamide material. By providing the oleophobic coating 24, the adhesion of lubricating oil to the inner wall of the second connecting sleeve 12 is reduced, and the lubricating oil flows more easily from the inner wall, reducing the residue and accumulation of lubricating oil inside the equipment, and avoiding the "oil mist" or "oil droplets" formed due to the accumulation of lubricating oil.
[0042] Furthermore, the fan frame 10 is provided with an oil drain hole 14 that communicates with the oil vent 213. The oil drain hole 14 is located on and communicates with the oil collection tank 41. By providing the oil drain hole 14, the lubricating oil can flow smoothly into the oil collection tank 41, avoiding the accumulation of lubricating oil inside the equipment to form "oil mist" or "oil droplets," preventing the lubricating oil from contaminating the internal components of the equipment, ensuring the insulation performance of the equipment, reducing the risk of short circuit faults caused by lubricating oil contamination, and improving the reliability and safety of the equipment.
[0043] Preferably, a second filter screen 42 is provided at the top of the oil collection tank 41, and the second filter screen 42 is connected to the oil collection tank 41 by screws. By providing the second filter screen 42, the lubricating oil flowing into the oil collection tank 41 can be further filtered to remove any impurities and ensure the purity of the lubricating oil. At the same time, the connection between the second filter screen 42 and the oil collection tank 41 by screws allows the second filter screen 42 to be disassembled and installed as needed, facilitating replacement or cleaning and extending the service life of the second filter screen 42.
[0044] Furthermore, a fixing structure is provided between the connecting seat 40 and the oil collection tank 41. The fixing structure includes a mounting hole within the connecting seat 40, and a movably connected limiting block 432 within the mounting hole. A spring 431 is provided between the limiting block 432 and the mounting hole. The top of the limiting block 432 has an arc-shaped portion, which can engage with or move away from the outer wall of the oil collection tank 41. The oil collection tank 41 and the connecting seat 40 are connected by screws. By providing the fixing structure, the oil collection tank 41 can be initially fixed within the connecting seat 40, allowing for secure locking between the oil collection tank 41 and the connecting seat 40 using screws. This ensures the reliability of the lubricating oil recovery system and avoids lubricating oil leakage caused by unstable installation of the oil collection tank 41.
[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A cooling fan designed to prevent oil spillage, characterized in that, The fan includes a fan frame, fan blades, and a first filter screen; the fan frame has an upwardly protruding bearing seat in the center; the fan blades are disposed on the bearing seat, and the fan blades and the bearing seat are detachably connected; the first filter screen is detachably connected to one side of the fan frame. The fan blade is provided with a first connecting sleeve; a second connecting sleeve is provided between the fan blade and the bearing seat; the first connecting sleeve and the second connecting sleeve are tightly connected to form a sealed cavity to prevent lubricating oil from being thrown out. The first connecting sleeve is provided with a first oil-blocking unit for preventing lubricating oil from splashing out; the second connecting sleeve is provided with a second oil-blocking unit for lubricating oil splashing out and collecting; the bottom end of the fan frame is provided with a connecting seat, and the connecting seat is provided with an oil collection tank for lubricating oil recovery, and the oil collection tank is connected to the second oil-blocking unit.
2. The anti-oil-slinging cooling fan according to claim 1, characterized in that: The first oil-blocking unit includes a sleeve ring fixed to the top of the inside of the fan blade; an outwardly extending elastic baffle is provided on the outside of the sleeve ring.
3. The anti-oil-slinging cooling fan according to claim 2, characterized in that: The second oil baffle unit includes an oil baffle plate; the oil baffle plate is disposed at the top of the second connecting sleeve and located below the elastic baffle plate. When the first connecting sleeve and the second connecting sleeve are tightly connected, the outer end of the elastic baffle plate abuts against the top of the oil baffle plate.
4. The anti-oil-slinging cooling fan according to claim 1, characterized in that: The second connecting sleeve has an upwardly protruding blocking part at its top end; the blocking part is integrally formed with the second connecting sleeve to form a serrated structure; the serrated structure has a sealing layer for preventing lubricating oil leakage.
5. The anti-oil-slinging cooling fan according to claim 1, characterized in that: The inner wall of the second connecting sleeve is provided with multiple sets of inwardly recessed annular grooves, and the multiple sets of annular grooves are distributed at equal intervals on the inner wall of the second connecting sleeve; the multiple sets of annular grooves are provided with interconnected oil-draining grooves.
6. The anti-oil-slinging cooling fan according to claim 5, characterized in that: The grease trap is tapered and inclined along the direction of lubricant flow.
7. The anti-oil-slinging cooling fan according to claim 5 or 6, characterized in that: The inner wall of the second connecting sleeve is provided with an oleophobic coating; the oleophobic coating is made of polyacrylamide material.
8. The anti-oil-slinging cooling fan according to claim 7, characterized in that: The fan frame is provided with an oil drain hole that communicates with the oil vent groove; the oil drain hole is located on the oil collection tank and communicates with the oil collection tank.
9. The anti-oil-slinging cooling fan according to claim 1, characterized in that: The top of the oil collection tank is equipped with a second filter screen, which is connected to the oil collection tank by screws.
10. The anti-oil-slinging cooling fan according to claim 9, characterized in that: A fixing structure is provided between the connecting seat and the oil collection tank; the fixing structure includes a mounting hole provided in the connecting seat, and a movably connected limiting block is provided in the mounting hole; a spring is provided between the limiting block and the mounting hole; the top of the limiting block is provided with an arc portion, which can be engaged with or moved away from the outer wall of the oil collection tank; the oil collection tank and the connecting seat are connected by screws.