CN2916206Y - Cooling fan with circulating oil circuit - Google Patents

Abstract

A heat radiation fan with circulation oil path includes a shell seat unit, a bearing unit, a fan wheel unit and a stator unit, the shell seat unit has a fixed seat, and a sleeve set on the fixed seat, the sleeve has a top plate and a cylinder ring, the cylinder ring can define a small aperture section, a ring shoulder and a large aperture section, the bearing unit has a bearing and a sealing disk set under the bearing, the bearing has an upper ring part set in the small aperture section and spaced with the top plate, a lower ring part set in the large aperture section and abutted against the ring shoulder, and at least a through hole, the upper ring part forms an axial groove corresponding to the through hole, when the fan wheel unit rotates, the oil can be sucked up to the top surface of the bearing and flowed back along the axial groove and through hole to form circulation oil path. The utility model discloses can provide endless oil circuit, make the fan operation smooth and easy, extension fan life.

Description

Cooling fan with circulating oil circuit

【Technical field】

The utility model relates to a cooling fan, in particular to a cooling fan with a circulating oil circuit.

【Background technique】

As shown in FIGS. 1-3 , an existing fan 1 is shown. The fan 1 includes a casing 11 , a bearing unit 12 , a stator unit 13 , and a fan wheel unit 14 . The casing 11 has a fixing base 111 at the bottom of the center, an oil storage tank 112 is formed on the fixing base 111 , and an embedding groove 113 surrounding the oil storage tank 112 is formed.

The bearing unit 12 has a sleeve 121 embedded in the slot 113 of the fixing seat 111 , and a bearing 122 tightly accommodated in the sleeve 121 and defining a through hole 120 . The bearing 122 has an upper shaft section 123, a lower shaft section 124 connected to the upper shaft section 123 and having a diameter smaller than the upper shaft section 123, a plurality of grooves 125 formed at intervals on the outer peripheral surface of the upper shaft section 123, A plurality of through grooves 126 are formed on the bottom surface of the lower shaft section 124 , and three chamfers 127 are respectively located at the top edge, the bottom edge of the upper shaft section 123 and the bottom edge of the lower shaft section 124 .

The stator unit 13 has a stator 131 set on the sleeve 121 , and a circuit board 132 connected to the bottom of the stator 131 and leaning against the fixing base 111 of the casing 11 .

The fan wheel unit 14 has a hub 141, a plurality of fan blades 142 extending outward from the hub 141, a magnet ring 143 attached to the inner surface of the hub 141, a magnet ring 143 extending downward from the hub 141 and passing through the hub 141. The rotating shaft 144 of the through hole 120 of the bearing 122 , a snap ring 145 clamped at the bottom of the rotating shaft 144 , and a washer 146 accommodated in the oil storage tank 112 of the fixing seat 111 and resisted by the rotating shaft 144 .

When the rotating shaft 144 of the fan wheel unit 14 rotates, a centrifugal force can be formed to throw off the oil on the rotating shaft 144, so that the oil in the oil storage tank 112 can flow upwards to the bearing 122 along the rotating shaft 144. top surface. Then, flow into the groove 125 along the chamfer 127 of the upper shaft section 123 . Finally, the oil flows back into the oil storage tank 112 through the through groove 126 to complete the action of oil return.

When assembling the fan 1 , the bearing 122 is forced into the bushing 121 first, and then the rotating shaft 144 is inserted into the through hole 120 of the bearing 122 . However, the bearing 122 is fixed by a tight fit, so the through hole 120 is likely to be squeezed and deformed, thereby affecting the straightness of the rotating shaft 144, causing the rotating shaft 144 to run unsmoothly and generate rotational noise. resulting in a shortened lifespan. At the same time, because the upper opening of the shaft sleeve 121 does not have any blocking structure, the oil is likely to overflow when flowing through the top surface of the bearing 122 .

As shown in FIG. 4 , another current fan 2 is shown. The fan 2 includes a casing 21 , a bearing unit 22 , a stator unit 23 , and a fan wheel unit 24 . Wherein, the structures of the casing 21, the stator unit 23, and the fan wheel unit 24 are the same as those of the aforementioned fan 1 (see FIG. 3 ), and will not be repeated here. And the bearing unit 22 has a shaft sleeve 221 , a bearing 222 tightly accommodated in the shaft sleeve 221 , and a bearing cover 223 which covers the upper opening of the shaft sleeve 221 . Utilize the setting of the bearing cover 223 to avoid oil leakage. Although the fan 2 can solve the problem of oil spillage, the fan 2 still has the problem that the fan wheel unit 24 does not operate smoothly and generates rotational noise, resulting in a shortened service life.

【Content of utility model】

The purpose of the utility model is to provide a cooling fan with a circulating oil circuit, which can provide a circulating oil circuit, make the operation smooth, and prolong the service life.

A heat dissipation fan with a circulating oil circuit of the utility model comprises a housing unit, a bearing unit, a fan wheel unit, and a stator unit, the housing unit has a fixing seat, and a The upper sleeve, the bearing unit is accommodated in the ring of the sleeve, and has a bearing whose top is adjacent to the top plate, the fan wheel unit has a hub, a plurality of fan blades extending outward from the hub, a A magnetic ring arranged on the inner surface of the hub, and a rotating shaft arranged in the hub and extending downward, the stator unit is interposed between the magnetic ring of the fan wheel unit and the sleeve of the housing unit, and is characterized in that :

The sleeve has a top plate formed with a perforation, and a cylinder ring extending downward from the periphery of the top plate and connected to the fixing seat. The cylinder ring defines a small aperture section from top to bottom, a ring shoulder, and a large-aperture section whose outer diameter is larger than the small-aperture section, and the bearing unit also has a sealing disc closely arranged under the bearing, the bearing defines a shaft hole, and has a and an upper ring part spaced apart from the top plate, a lower ring part connected to the upper ring part and accommodated in the large aperture section and leaning against the ring shoulder, and at least one ring part located at the upper and lower ring parts The upper ring part is formed with an axial groove corresponding to and communicated with the through hole, and a first oil container communicating with the axial groove is defined between the upper ring part and the top plate. Space, a second oil holding space connected to the through hole is defined between the lower ring part and the sealing disc, the rotating shaft passes through the through hole of the sleeve and passes through the bearing of the bearing unit and abuts against the sealing disc The oil is thrown out by the centrifugal force generated when the rotating shaft of the fan wheel unit rotates, and the oil contained in the second oil holding space is sucked up, and flows upward along the shaft hole to the first holding space The oil space returns to the second oil holding space through the axial groove and the through hole of the bearing to form a circulating oil circuit.

The beneficial effect of the utility model is that: through the axial groove and the through hole, the oil can be allowed to flow back from the first oil holding space to the second oil holding space to achieve circulating flow; at the same time, by means of the The sealing disk pushes against the lower ring part of the bearing, and then makes the lower ring part lean against the ring shoulder of the cylinder ring to achieve positioning. Therefore, the rotating shaft will not be squeezed by the bearing, but can Smooth operation, which in turn can extend the service life.

【Description of drawings】

Fig. 1 is a three-dimensional exploded view illustrating the structure of an existing fan;

Fig. 2 is a perspective view illustrating a bearing of the fan in Fig. 1;

Figure 3 is a sectional side view of the fan;

Fig. 4 is a sectional side view illustrating another existing fan;

Fig. 5 is a cross-sectional side view illustrating the appearance of a preferred embodiment of the cooling fan with circulating oil circuit of the present invention;

Fig. 6 is a perspective view illustrating the appearance of a bearing of the preferred embodiment;

Figure 7 is a sectional side view of the bearing;

Figure 8 is a top view of the bearing;

Fig. 9 is a top view illustrating another aspect of the bearing;

Figure 10 is a top view illustrating another aspect of the bearing; and

Fig. 11 is a plan view illustrating still another aspect of the bearing.

【Detailed ways】

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

As shown in FIGS. 5-7 , the preferred embodiment of the cooling fan with circulating oil circuit of the present invention includes a housing unit 3 , a bearing unit 4 , a fan wheel unit 5 , and a stator unit 6 .

The housing unit 3 has a fixing base 31 and a hollow sleeve 32 inserted on the fixing base 31 . The sleeve 32 has a circular top plate 321 , and a cylindrical ring 322 extending downward from the outer periphery of the top plate 321 and engaging with the fixing seat 31 of the housing unit 3 . The top plate 321 is formed with a central through hole 323 . The cylinder ring 32 defines a small-diameter section 324 , a ring shoulder 325 , and a large-diameter section 326 with an outer diameter larger than the small-diameter section 324 from top to bottom.

The bearing unit 4 is accommodated in the cylinder ring 322 of the sleeve 32 , and has a bearing 41 adjacent to the top plate 321 , and a sealing disc 42 disposed under the bearing 41 in an airtight manner.

The bearing 41 can define a shaft hole 410, and has an upper ring portion 411 accommodated in the small aperture section 324 and spaced from the top plate 321, and an upper ring portion 411 connected to the upper ring portion 411 and accommodated in the large aperture portion. The lower ring portion 412 in the section 326 and abutting against the ring shoulder 325 , and two corresponding through holes 413 located between the upper and lower ring portions 411 , 412 . Two axial grooves 414 corresponding to the two through holes 413 are formed on the outer peripheral surface of the upper ring part 411, and a plurality of spaced grooves are formed on the inner surface of the upper ring part 411 for accommodating oil and guiding Diversion grooves 415 for oil flow. A first oil holding space 43 communicating with the two axial grooves 414 can be defined between the upper ring part 411 and the top plate 321, and a first oil holding space 43 can be defined between the lower ring part 412 and the sealing disc 42. The through hole 413 communicates with the second oil holding space 44 .

The sealing disc 42 has a disc body 421 that is accommodated in the large-aperture section 326 of the cylinder ring 322 and is in a concave shape, and a disc body 421 is interposed between the large-aperture section 326 of the sleeve 32 to prevent oil from leaking out. A sealing ring 422 and a gasket 423 accommodated in the disc body 421 . Preferably, the disc body 421 is closely matched with the large-diameter section 326 and is difficult to move in the large-diameter section 326 . Of course, the sealing ring 422 can also be positioned in the large-aperture section 326 .

In this preferred embodiment, the bearing 41 is an oil bearing made of copper, and its bottom is in a concave shape, that is, the lower ring portion 412 is hollow, which can increase the capacity of the second oil holding space 44. oil volume. In this embodiment, two through holes 413 are taken as an example, but in practice there may be three or more than three through holes. Of course, a single through hole 413 is also feasible. The aforementioned axial grooves 414 are provided in accordance with the number of the through holes 413 .

As shown in FIG. 8 , in this preferred embodiment, the cross-section of each axial groove 414 is roughly U-shaped. Certainly, the aforementioned axial groove 414 may also be in other shapes. As shown in FIG. 9 , the cross-section of each axial groove 414 is substantially arc-shaped. As shown in FIG. 10 , the cross-section of each axial groove 414 is roughly V-shaped. As shown in FIG. 11 , the cross-section of each axial groove 414 is substantially flat. It is worth mentioning that different cross-sectional shapes can form spaces of different sizes. In actual use, it should be selected according to the properties of the oil, such as the size of the surface tension and the level of viscosity.

5-7, the fan wheel unit 5 has a hub 51, a plurality of fan blades 52 extending outward from the hub 51, a magnetic ring 53 set on the inner surface of the hub 51, a magnetic ring 53 set on the hub 51 A rotating shaft 54 extending inwardly and downwards, and a clasp 55 . A ring groove 541 is formed on the bottom of the rotating shaft 54 for the snap ring 55 to snap on.

The rotating shaft 54 passes through the through hole 323 of the sleeve 32 , then passes through the shaft hole 410 of the bearing 41 , and abuts against the washer 423 of the sealing disc 42 . By means of the snap ring 55 , the rotating shaft 54 can be prevented from detaching from the bearing 41 . The washer 423 can reduce friction when the shaft 54 is rotated. In this preferred embodiment, the gap between the rotating shaft 54 and the through hole 323 of the sleeve 32 should not be too large to avoid oil leakage. Preferably, the gap is not greater than 0.5 mm. In terms of design, the size of the gap is adjusted according to the viscosity of the oil used.

The stator unit 6 is between the magnetic ring 53 of the fan wheel unit 5 and the sleeve 32 of the housing unit 3, and has a stator 61 set on the sleeve 32, and a stator 61 connected to it. The circuit board 62. When the circuit board 62 is energized, the stator 61 and the magnetic ring 53 can form a repulsive force, so as to push the fan wheel unit 5 to rotate.

Because the distance between the shaft 54 and the shaft hole 410 of the bearing 41 is small, the oil contained in the second oil holding space 44 can be sucked up by the siphon effect. While in operation, the rotation of the shaft 54 generates centrifugal force to throw the oil out, so that the oil will flow upward along the shaft hole 410 to the first oil holding space 43 . Through the design of the top plate 321, the oil liquid can be prevented from overflowing. Then, the oil will flow down from the first oil holding space 43 along each axial groove 414, and flow into the corresponding through hole 413, and then return to the second oil holding space 44 to complete a cycle. The oil passage enables the rotating shaft 54 of the fan wheel unit 5 to be lubricated and rotate smoothly at any time during operation.

Since the design of the heat dissipation fan with circulating oil passage is to utilize the sealing disk 42 to move upwards, the lower ring portion 412 of the bearing 41 abuts against the ring shoulder portion 325 of the sleeve 32 to achieve positioning. Therefore, the cooperation between the bearing 41 and the sleeve 32 does not need to be designed as in the prior art, and can be assembled in an urgent manner. In other words, the shaft hole 410 of the bearing 41 can maintain the original precision without being squeezed, avoiding distortion and deformation, and the rotating shaft 54 can therefore maintain proper straightness and can move smoothly and stably. The shaft hole 410 rotates. Therefore, reduce undue friction and noise generation to prolong its service life.

To sum up the above, the heat dissipation fan with circulating oil circuit of the present invention utilizes the sealing disc 42 to push against the bearing 41 so as to abut against the ring shoulder 325 of the sleeve 32 to achieve positioning. Therefore, the bearing 41 does not need to be tightly matched with the sleeve 32, so as to avoid squeezing the shaft hole 410 of the bearing 41, prevent the twisting and deformation of the rotating shaft 54, and reduce improper friction and noise during operation, so as to prolong the life of the shaft. its useful life.

Claims (11)

1. A heat dissipation fan with a circulating oil circuit, comprising a housing unit, a bearing unit, a fan wheel unit, and a stator unit, the housing unit has a fixed seat, and a seat set on the fixed seat The sleeve, the bearing unit is accommodated in the sleeve ring, and has a bearing whose top is adjacent to the top plate, the fan wheel unit has a hub, a plurality of fan blades extending outward from the hub, and a The magnetic ring on the inner surface of the hub, and a rotating shaft arranged in the hub and extending downward, the stator unit is interposed between the magnetic ring of the fan wheel unit and the sleeve of the housing unit, and is characterized in that: The sleeve has a top plate formed with a perforation, and a cylinder ring extending downward from the periphery of the top plate and connected to the fixing seat. The cylinder ring defines a small aperture section from top to bottom, a ring shoulder, and a large-aperture section whose outer diameter is larger than the small-aperture section, and the bearing unit also has a sealing disc closely arranged under the bearing, the bearing defines a shaft hole, and has a and an upper ring part spaced apart from the top plate, a lower ring part connected to the upper ring part and accommodated in the large aperture section and leaning against the ring shoulder, and at least one ring part located at the upper and lower ring parts The upper ring part is formed with an axial groove corresponding to and communicated with the through hole, and a first oil container communicating with the axial groove is defined between the upper ring part and the top plate. Space, a second oil holding space connected to the through hole is defined between the lower ring part and the sealing disc, the rotating shaft passes through the through hole of the sleeve and passes through the bearing of the bearing unit and abuts against the sealing disc . 2. The cooling fan with circulating oil passage according to claim 1, characterized in that: the inner surface of the upper ring part of the bearing is formed with a plurality of guide grooves that can accommodate oil and guide oil flow. 3. The cooling fan with circulating oil passage according to claim 2, characterized in that: the bearing of the bearing unit has a plurality of through holes located between the upper and lower ring parts, and the upper ring part is formed with a plurality of Axial grooves communicating with the aforementioned through holes respectively. 4. The cooling fan with circulating oil passage according to claim 3, characterized in that: the plurality of axial grooves and through holes on the bearing of the bearing unit are arranged symmetrically with each other. 5 . The cooling fan with circulating oil passage as claimed in claim 4 , wherein the section of each axial groove on the bearing of the bearing unit is V-shaped. 5 . 6 . The cooling fan with circulating oil passage as claimed in claim 4 , wherein the section of each axial groove on the bearing of the bearing unit is U-shaped. 6 . 7. The cooling fan with circulating oil passage as claimed in claim 4, wherein the section of each axial groove on the bearing of the bearing unit is arc-shaped. 8 . The cooling fan with circulating oil passage as claimed in claim 4 , wherein the cross-section of each axial groove on the bearing of the bearing unit is a flat cut shape. 9 . 9. The cooling fan with circulating oil circuit according to claim 5, 6, 7 or 8, characterized in that: a ring groove is formed on the bottom of the rotating shaft of the fan wheel unit, and the fan wheel unit also has a set of The retaining ring on the ring groove of the shaft. 10. The heat dissipation fan with circulating oil passage as claimed in claim 9, characterized in that: the sealing disk of the bearing unit has a concave disk body, a large-aperture section between the disk body and the sleeve A sealing ring, and a spacer accommodated in the disc body and opposed by the rotating shaft of the fan wheel unit. 11 . The cooling fan with circulating oil circuit according to claim 10 , wherein the stator unit has a stator set on the sleeve of the housing unit, and a circuit board connected to the stator. 11 .

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