Fan and electronic equipment

Abstract

The invention relates to the technical field of fans, and aims to solve the problems that a bearing structure of an existing fan is prone to being rubbed with other parts, so that noise of the fan is large, and abrasion is too fast. The invention provides a fan and electronic equipment. The fan comprises a shell, an impeller and a bearing. The housing includes a base plate and a sleeve defining an interior space. The impeller comprises a hub, a shaft rod and a thrust plate. The bearing is arranged in the internal space. The bearing cooperates with the shaft sleeve. The bearing has a first end surface, a second end surface, an inner peripheral surface, and an outer peripheral surface. The fan defines first to fourth oil paths, a first axial dynamic pressure oil path, a second axial dynamic pressure oil path, and a radial dynamic pressure oil path. The first oil way, the second oil way, the third oil way, the fourth oil way and the fourth oil way are sequentially communicated to form a liquid loop, and the first axial dynamic pressure oil way, the second axial dynamic pressure oil way and the radial dynamic pressure oil way generate axial dynamic pressure and radial dynamic pressure to enable the impeller to be kept in a suspension state. The fan has the beneficial effects that the impeller is completely suspended, friction of the fan is reduced, the sound quality is improved, and the service life of the fan is prolonged.

Description

Fans and electronic devices Technical Field

[0001] This application relates to the field of fan technology, and more specifically, to a fan and electronic device. Background Technology

[0002] Some existing fans have bearing structures that are prone to friction with other parts, leading to wear of the shaft or bearing and / or generating significant noise. Summary of the Invention

[0003] This application provides a fan and electronic device to solve the problem that the worn shaft of an existing fan generates excessive noise.

[0004] This application provides a fan, including a housing, an impeller, a bearing, a first axial dynamic pressure oil passage, a second axial dynamic pressure oil passage, and a radial dynamic pressure oil passage. The housing includes a base plate and a bushing, with the bushing connected to the base plate. The bushing defines an internal space. The impeller includes a hub, a shaft, and a thrust plate. The shaft has a first end and a second end opposite each other along the axial direction; the first end is connected to the hub, and the second end extends into the internal space of the bushing. The thrust plate is connected to the second end of the shaft. The bearing is disposed within the internal space. The shaft is rotatably connected to the bushing via the bearing, which is located between the hub and the thrust plate. The bearing has a first end face and a second end face opposite each other along the axial direction, and also has an inner circumferential surface and an outer circumferential surface. The first axial dynamic pressure oil passage is connected to the impeller's surface perpendicular to the axial direction. The first axial dynamic pressure oil passage is capable of generating first axial dynamic pressure. The second axial dynamic pressure oil passage is correspondingly arranged with the first axial dynamic pressure oil passage, and is capable of generating second axial dynamic pressure. A radial dynamic pressure oil passage is located between the inner circumferential surface of the bearing and the outer circumferential surface of the shaft, generating radial dynamic pressure. Specifically, a first oil passage is defined between the inner circumferential surface of the bearing and the outer circumferential surface of the shaft; a second oil passage is defined between the first end face and the hub; a third oil passage is defined between the outer circumferential surface of the bearing and the bushing; and a fourth oil passage is defined between the second end face and the thrust washer. The first, second, third, and fourth oil passages are sequentially connected to form a liquid circuit. The impeller can remain completely suspended under the action of the first axial dynamic pressure, the second axial dynamic pressure, and the radial dynamic pressure.

[0005] The fan provided in this application has a housing, an impeller, and a bearing. The inner circumferential surface of the bearing mates with the impeller to form a first oil passage, the first end face of the bearing mates with the impeller to form a second oil passage, the outer circumferential surface of the bearing mates with the impeller to form a third oil passage, and the second end face of the bearing mates with the housing to form a fourth oil passage. The first to fourth oil passages are connected in sequence to form a liquid circuit. The lubricating oil circulates in the liquid circuit and, under the action of the first axial dynamic pressure oil passage, the second axial dynamic pressure oil passage, and the radial dynamic pressure oil passage, keeps the impeller in a completely suspended state, reducing the wear between the shaft and the housing when the impeller rotates, and also reducing the noise of the fan.

[0006] In one possible implementation, the bearing further includes a first connecting hole that penetrates both the inner and outer circumferential surfaces of the bearing. The first connecting hole is located between a first end face and a second end face, and connects a first oil passage and a third oil passage.

[0007] In one possible implementation, the bearing is further provided with a second connecting hole, which passes through the first end face and the second end face, and connects the second oil passage and the fourth oil passage.

[0008] In one possible implementation, a first dynamic pressure groove is formed on the inner circumferential surface of the bearing, and a radial dynamic pressure oil passage is formed between the first dynamic pressure groove and the outer circumferential surface of the shaft. And / or, a second dynamic pressure groove is formed on the first end face, and the second dynamic pressure groove fits into the hub to form a first axial dynamic pressure oil passage. And / or, a fourth dynamic pressure groove is formed on the second end face, and the fourth dynamic pressure groove fits into the thrust washer to form a second axial dynamic pressure oil passage.

[0009] In one possible implementation, the outer peripheral surface of the bearing also has a cut-off portion that extends axially through the first and second end faces of the bearing to define an external communication channel between the bearing and the bushing.

[0010] In one possible implementation, the hub further includes a thrust portion, with the bearing sandwiched between the thrust portion and the thrust plate. The outer periphery of the first end face of the bearing is recessed to form a first annular groove. The thrust portion also has a convex ring that engages with the first annular groove.

[0011] In one possible implementation, an L-shaped communication gap is defined between the convex ring and the first annular groove. One axial end of the bushing is clamped to the outside of the convex ring, and an outlet gap is defined between the convex ring and the bushing. A sealing layer is provided within the outlet gap to seal the communication gap.

[0012] In one possible implementation, the bushing also has a limiting boss, which protrudes from the side of the bushing away from the hub along the axial direction. The second end face of the bearing cooperates with the limiting boss to form an oil storage space between the second end face and the base plate. The oil storage space is connected to the fourth oil passage.

[0013] In one possible implementation, the fan further includes a stator connected to the outer annular surface of a bushing. The impeller also includes a rotor and fan blades, the fan blades being connected to a hub and corresponding circumferentially to the stator, so that the fan blades can interact with the stator and rotate.

[0014] This application also provides an electronic device, including a housing, electronic components, and a fan. The electronic components are disposed within the housing. The fan is disposed within the housing and is used to dissipate heat from the electronic components or the housing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0017] Figure 2 is an exploded view of the fan in Figure 1.

[0018] Figure 3 is a cross-sectional view of the fan in Figure 1 along line AA.

[0019] Figure 4 is an enlarged view of part B in Figure 3.

[0020] Figure 5 is an enlarged view of part B in Figure 3 in one embodiment.

[0021] Figure 6 is an enlarged view of part B in Figure 3 in another embodiment.

[0022] Figure 7 is a top view of the bearing in Figure 2.

[0023] Figure 8 is a cross-sectional view of the bearing in Figure 7 along line CC.

[0024] Figure 9 is a cross-sectional view of the bearing in Figure 7 along line DD.

[0025] Figure 10 is an enlarged view of a portion of the structure in Figure 3 in another embodiment.

[0026] Figure 11 is a top view of the bearing in Figure 10.

[0027] Figure 12 is a cross-sectional view of the bearing in Figure 11 along line EE.

[0028] Figure 13 is a cross-sectional view of the bearing in Figure 11 along line FF.

[0029] Explanation of main component symbols: Electronic equipment 1000 Housing 200 Electronic components 300 Fan 100 Housing 10 Base plate 101 Bushing 102 Internal space 1021 Limiting boss 1022 Stator 103 Impeller 11 Hub 111 Thrust part 1111 First convex ring 1112 Second ring groove 1113 Shaft 112 First end 1121 Second end 1122 Thrust plate 113 Fan blade 114 Rotor 115 Bearing 12 First end face 121 Second dynamic pressure groove 1211 Second end face 122 Fourth dynamic pressure groove 1221 Inner peripheral surface 123 First dynamic pressure groove 1231 Outer peripheral surface 124 Cut-off portion 1241 First connecting hole 125 Second connecting hole 126 First annular groove 127 Second convex ring 1271 Liquid circuit 13 First oil passage 131 Second oil passage 132 Third oil passage 133 Fourth oil passage 134 First axial dynamic pressure oil passage 135 Second axial dynamic pressure oil passage 136 Radial dynamic pressure oil passage 137 Sealing layer 14 Oil storage space 15 External connecting channel 16 Connecting gap 17 The following detailed embodiments will further illustrate this application in conjunction with the above drawings. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] Referring to Figure 1, this embodiment provides an electronic device 1000, which includes a housing 200, electronic components 300, and a fan 100. The electronic components 300 are disposed within the housing 200. The fan 100 is disposed within the housing 200 and is used to dissipate heat from the electronic components 300 or the housing 200.

[0035] Referring to Figures 2 to 9, in this embodiment, the fan 100 includes a housing 10, an impeller 11, a bearing 12, a first axial dynamic pressure oil passage 135, a second axial dynamic pressure oil passage 136, and a radial dynamic pressure oil passage 137. The housing 10 includes a base plate 101 and a bushing 102, the bushing 102 being connected to the base plate 101. The bushing 102 defines an internal space 1021. The impeller 11 includes a hub 111, a shaft 112, and a thrust plate 113. The shaft 112 has a first end 1121 and a second end 1122 that are axially opposed, the first end 1121 being connected to the hub 111, and the second end 1122 extending into the internal space 1021 of the bushing 102. The thrust plate 113 is connected to the second end 1122 of the shaft 112. The bearing 12 is disposed in the internal space 1021. The shaft 112 is rotatably connected to the bushing 102 via a bearing 12, which is located between the hub 111 and the thrust plate 113. The bearing 12 has a first end face 121 and a second end face 122 facing each other axially, and also has an inner circumferential surface 123 and an outer circumferential surface 124. A first axial dynamic pressure oil passage 135 is connected to the surface of the impeller 11 perpendicular to the axial direction. The first axial dynamic pressure oil passage 135 can generate a first axial dynamic pressure. A second axial dynamic pressure oil passage 136 is correspondingly provided to the first axial dynamic pressure oil passage 135, and can generate a second axial dynamic pressure. A radial dynamic pressure oil passage 137 is provided between the inner circumferential surface 123 of the bearing 12 and the outer circumferential surface 124 of the shaft 112, and can generate radial dynamic pressure. A first oil passage 131 is defined between the inner circumferential surface 123 of the bearing 12 and the outer circumferential surface of the shaft 112; a second oil passage 132 is defined between the first end face 121 and the hub 111; a third oil passage 133 is defined between the outer circumferential surface 124 of the bearing 12 and the bushing 102; and a fourth oil passage 134 is defined between the second end face 122 and the thrust plate 113. The first oil passage 131, the second oil passage 132, the third oil passage 133, and the fourth oil passage 134 are sequentially connected to form a liquid circuit 13. The impeller 11 can be in a completely suspended state under the action of the first axial dynamic pressure, the second axial dynamic pressure, and the radial dynamic pressure.

[0036] In this embodiment, the liquid circuit 13 contains lubricating oil (not shown in the figure). The lubricating oil circulates in the liquid circuit 13 and, under the combined action of the first axial dynamic pressure, the second axial dynamic pressure, and the radial dynamic pressure, keeps the impeller 11 in a completely suspended state. This reduces the friction generated by the rotation of the impeller 11, suppresses the deflection of the impeller 11, and reduces the temperature rise of the bearing 12. This reduces the noise generated by the rotation of the fan 100, reduces the wear of the fan 100, improves the sound quality of the fan 100, and extends the life of the fan 100.

[0037] In this embodiment, the first axial dynamic pressure and the second axial dynamic pressure are equal in magnitude and opposite in direction. The first axial dynamic pressure and the second axial dynamic pressure act simultaneously on the impeller 11, so that the impeller 11 is in a completely suspended state.

[0038] In this embodiment, the first axial dynamic pressure oil passage 135 is disposed between the first end face 121 and the hub 111, and the second axial dynamic pressure oil passage 136 is disposed between the second end face 122 and the thrust plate 113. When the fan 100 is working, the first axial dynamic pressure oil passage 135 generates the first axial dynamic pressure, and the second axial dynamic pressure oil passage 136 generates the second axial dynamic pressure. The first axial dynamic pressure and the second axial dynamic pressure work together to make the impeller 11 suspend axially.

[0039] In another embodiment, referring to FIG6, the first axial dynamic pressure oil passage 135 is disposed between the thrust plate 113 and the base plate 101, and the second axial dynamic pressure oil passage 136 is disposed between the second end face 122 and the thrust plate 113. When the fan 100 is working, the first axial dynamic pressure and the second axial dynamic pressure are balanced, so that the impeller 11 is suspended axially.

[0040] In this embodiment, the bearing 12 is also provided with a first connecting hole 125, which passes through the inner peripheral surface 123 and the outer peripheral surface 124 of the bearing 12. The first connecting hole 125 is located between the first end face 121 and the second end face 122, and connects the first oil passage 131 and the third oil passage 133.

[0041] In this embodiment, the first connecting hole 125 connects the first oil passage 131 and the third oil passage 133, and the lubricating oil accelerates its radial flow speed through the first connecting hole 125.

[0042] In this embodiment, the number of first connecting holes 125 can be zero, one, two, three, or more.

[0043] In this embodiment, the bearing 12 is also provided with a second connecting hole 126, which passes through the first end face 121 and the second end face 122, and connects the second oil passage 132 and the fourth oil passage 134.

[0044] In this embodiment, the second connecting hole 126 connects the second oil passage 132 and the fourth oil passage 134, and the lubricating oil accelerates its axial flow speed through the first connecting hole 125.

[0045] In this embodiment, the number of second connecting holes 126 can be zero, one, two, three, or more.

[0046] In this embodiment, the inner circumferential surface 123 of the bearing 12 is provided with a first dynamic pressure groove 1231, which forms a radial dynamic pressure oil passage 137 with the outer circumferential surface 124 of the shaft 112. The first end face 121 is provided with a second dynamic pressure groove 1211, which fits into the hub 111 to form a first axial dynamic pressure oil passage 135. The second end face 122 is provided with a fourth dynamic pressure groove 1221, which fits into the thrust washer 113 to form a second axial dynamic pressure oil passage 136.

[0047] In this embodiment, the first oil passage 131 is composed of the gap between the shaft 112 and the inner circumferential surface 123 of the bearing 12 and the groove space of the first dynamic pressure groove 1231; the second oil passage 132 is composed of the gap between the first end face 121 of the bearing 12 and the hub 111 and the groove space of the second dynamic pressure groove 1211; the third oil passage 133 is composed of the gap between the outer circumferential surface 124 of the bearing 12 and the inner ring surface of the bushing 102; and the fourth oil passage 134 is composed of the gap between the second end face 122 of the bearing 12 and the thrust plate 113 and the groove space of the fourth dynamic pressure groove 1221.

[0048] In this embodiment, the first dynamic pressure groove 1231 forms a certain angle with the horizontal plane. When the bearing 12 rotates, the first dynamic pressure groove 1231 generates radial dynamic pressure, allowing the lubricating oil to flow in the first dynamic pressure groove 1231.

[0049] In this embodiment, the second dynamic pressure groove 1211 forms a certain angle with the radial direction of the first end face 121 of the bearing 12. When the bearing 12 rotates, the second dynamic pressure groove 1211 generates axial dynamic pressure, allowing the lubricating oil to flow in the second dynamic pressure groove 1211.

[0050] In this embodiment, the fourth dynamic pressure groove 1221 forms a certain angle with the radial direction of the second end face 122 of the bearing 12. When the bearing 12 rotates, the fourth dynamic pressure groove 1221 generates axial dynamic pressure, allowing the lubricating oil to flow in the fourth dynamic pressure groove 1221.

[0051] In this embodiment, the fan 100 has a second oil passage 132, a fourth oil passage 134, and a second connecting hole 126 in the radial direction, and lubricating oil can flow radially in the second oil passage 132, the fourth oil passage 134, and the second connecting hole 126. In the axial direction, it has a first oil passage 131, a third oil passage 133, and a first connecting hole 125, and lubricating oil can flow axially in the first oil passage 131, the third oil passage 133, and the first connecting hole 125. The number of the first connecting hole 125 and the second connecting hole 126 can be adjusted according to the rotational speed of the fan 100 to adjust the flow rate of the lubricating oil in the radial and axial directions, thereby enabling the impeller 11 to be in a completely suspended state.

[0052] In this embodiment, the outer peripheral surface 124 of the bearing 12 also has a cut-off portion 1241, which extends through the first end face 121 and the second end face 122 along the axial direction of the bearing 1 to define an external communication channel 16 between the bearing 12 and the bushing 102.

[0053] In this embodiment, the number of cut-off portions 1241 can be one, two, or more, to form a corresponding number of external connecting channels 16.

[0054] In this embodiment, after the cut-out portion 1241 is removed, a vertical external communication channel 16 is formed between the bearing 12 and the bushing 102, which increases the flow speed of lubricating oil along the axial direction.

[0055] In this embodiment, the number of cut-off portions 1241 can be adjusted according to the rotational speed of the bearing 12 to adjust the flow speed of lubricating oil along the axial direction of the bearing 12, so that the impeller 11 is in a completely suspended state.

[0056] In this embodiment, the hub 111 is further provided with a thrust portion 1111, and the bearing 12 is sandwiched between the thrust portion 1111 and the thrust plate 113113. The outer periphery of the first end face 121 of the bearing 12 is recessed to form a first annular groove 127; the thrust portion 1111 also has a first convex ring 1112, which is fitted into the first annular groove 127.

[0057] In another embodiment, referring to Figures 10 to 13, the thrust portion 1111 is also provided with a second annular groove 1113. The second groove is formed by the inner recess of the outer edge of the end face of the thrust portion 1111 along the axial direction. The radial outer edge of the first end face 121 of the bearing 12 is provided with a second convex ring 1271. The second convex ring 1271 corresponds to the second annular groove 1113 along the axial direction. The second convex ring 1271 can extend vertically into the second annular groove 1113.

[0058] In other embodiments, the thrust portion 1111 and the bearing 12 may also be designed as other structures forming a stepped fit.

[0059] Referring again to Figures 2 through 7, in this embodiment, an L-shaped communication gap 17 is defined between the first convex ring 1112 and the first annular groove 127. One axial end of the bushing 102 is clamped to the outside of the first convex ring 1112, and an outlet gap is defined between the first convex ring 1112 and the bushing 102. A sealing layer 14 is provided within the outlet gap to seal the communication gap 17.

[0060] In this embodiment, the thrust portion 1111 and the first annular groove 127 form a stepped fit to limit the bearing 12 radially, and make the outer side of the outer annular surface of the thrust portion 1111 correspond to the bushing 102 radially, so that a gap is formed between the bushing 102 and the thrust portion 1111 to accommodate the sealing layer 14.

[0061] In this embodiment, the sealing layer 14 is a descaling agent or other chemical substance that can prevent lubricating oil from migrating out or leaking.

[0062] In this embodiment, the bushing 102 also has a limiting boss 1022, which protrudes from the side of the bushing 102 away from the hub 111 along the axial direction. The second end face 122 of the bearing 12 cooperates with the limiting boss 1022 to form an oil storage space 15 between the second end face 122 and the base plate 101 to accommodate lubricating oil.

[0063] In this embodiment, the oil storage space 15 is connected to the fourth oil passage 134 to connect to the liquid circuit 13, so that the lubricating oil flows in the liquid circuit 13.

[0064] In this embodiment, the limiting boss 1022 is used to limit the axial displacement of the bearing 12, so that the thrust plate 113 and the base plate 101 are kept at a certain distance, thereby reducing the friction generated when the impeller 11 rotates.

[0065] In this embodiment, the fan 100 further includes a stator 103, which is connected to the outer annular surface of the bushing 102. The impeller 11 also includes a rotor 115 and a fan blade 114. The fan blade 114 is connected to the hub 111, and the rotor 115 is connected to the hub 111. The rotor 115 corresponds to the stator 103 radially, so that the rotor 115 can interact with the stator 103 and rotate, thereby driving the impeller 11 to rotate relative to the housing 10.

[0066] In summary, this application provides a fan 100, which includes a housing 10, an impeller 11, and a bearing 12. The housing 10 includes a bushing 102, and the impeller 11 includes a shaft 112, a hub 111, and a thrust plate 113. The bearing 12 is fitted to the shaft 112 and disposed between the hub 111 and the thrust plate 113. The bearing 12 has a first end face 121, a second end face 122, an inner circumferential surface 123, and an outer circumferential surface 124. A first oil passage 131 is defined between the inner circumferential surface 123 of the bearing 12 and the outer circumferential surface 124 of the shaft 112, a second oil passage 132 is defined between the first end face 121 and the hub 111, a third oil passage 133 is defined between the outer circumferential surface 124 of the bearing 12 and the bushing 102, and a fourth oil passage 134 is defined between the second end face 122 and the thrust plate 113. The first to fourth oil passages (131-134) are connected in sequence to form a liquid circuit 13. The liquid circuit 13 contains lubricating oil. When the impeller 11 rotates, the first oil passage 131, the second oil passage 132, and the fourth oil passage 134 can generate axial dynamic pressure and radial dynamic pressure, allowing the lubricating oil to circulate in the liquid circuit 13. This keeps the impeller 11 in a completely suspended state, reducing the friction generated by the rotation of the fan 100, improving the sound quality of the fan 100, and extending the life of the fan 100.

[0067] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A fan, characterized in that, include: A housing, comprising a base plate and a bushing connected to the base plate; the bushing defining an internal space; an impeller, comprising a hub, a shaft, and a thrust plate; the shaft having an axially opposed first end and a second end, the first end being connected to the hub and the second end extending into the internal space of the bushing; the thrust plate being connected to the second end of the shaft; and a bearing disposed in the internal space; the shaft being rotatably connected to the bushing via the bearing, the bearing being located between the hub and the thrust plate; the bearing having an axially opposed first end face and a second end face, and further having an inner circumferential surface and an outer circumferential surface; a first axial dynamic pressure oil passage connected to a surface of the impeller perpendicular to the axial direction; the first axial dynamic pressure oil passage being capable of generating a first axial dynamic pressure; a second axial dynamic pressure... The system includes a hydraulic oil circuit, with the second axial dynamic pressure oil circuit corresponding to the first axial dynamic pressure oil circuit, capable of generating a second axial dynamic pressure; and a radial dynamic pressure oil circuit disposed between the inner circumferential surface of the bearing and the outer circumferential surface of the shaft, capable of generating radial dynamic pressure; wherein, a first oil circuit is defined between the inner circumferential surface of the bearing and the outer circumferential surface of the shaft, a second oil circuit is defined between the first end face and the hub, a third oil circuit is defined between the outer circumferential surface of the bearing and the bushing, and a fourth oil circuit is defined between the second end face and the thrust washer; the first, second, third, and fourth oil circuits are sequentially connected to form a liquid circuit; the impeller can be in a completely suspended state under the combined action of the first axial dynamic pressure, the second axial dynamic pressure, and the radial dynamic pressure.

2. The fan according to claim 1, characterized in that: The bearing is also provided with a first connecting hole, which passes through the inner and outer circumferential surfaces of the bearing; the first connecting hole is located between the first end face and the second end face, and the first connecting hole connects the first oil passage and the third oil passage.

3. The fan according to claim 1 or 2, characterized in that: The bearing is also provided with a second connecting hole, which passes through the first end face and the second end face, and connects the second oil passage and the fourth oil passage.

4. The fan according to claim 1 or 2, characterized in that: The bearing has a first dynamic pressure groove on its inner circumferential surface, and the radial dynamic pressure oil passage is formed between the first dynamic pressure groove and the outer circumferential surface of the shaft; and / or, the first end face has a second dynamic pressure groove, and the second dynamic pressure groove is fitted to the hub to form a first axial dynamic pressure oil passage; and / or, the second end face has a fourth dynamic pressure groove, and the fourth dynamic pressure groove is fitted to the thrust washer to form a second axial dynamic pressure oil passage.

5. The fan according to claim 1, characterized in that: The outer peripheral surface of the bearing also has a cut-off portion that extends through the first end face and the second end face along the axial direction of the bearing to define an external communication channel between the bearing and the bushing.

6. The fan according to claim 1, characterized in that: The hub is also provided with a thrust portion, and the bearing is sandwiched between the thrust portion and the thrust plate; the outer periphery of the first end face of the bearing is recessed to form a first annular groove; the thrust portion also has a first convex ring, which is engaged with the first annular groove.

7. The fan according to claim 6, characterized in that: An L-shaped communication gap is defined between the first convex ring and the first annular groove; one axial end of the bushing is clamped to the outside of the first convex ring, and an outlet gap is defined between the first convex ring and the bushing; A sealing layer is provided inside the outlet gap to seal the communication gap.

8. The fan according to claim 1, characterized in that: The bushing also has a limiting boss, which protrudes from the side of the bushing away from the hub along the axial direction. The second end face of the bearing cooperates with the limiting boss to form an oil storage space between the second end face and the base plate. The oil storage space is connected to the fourth oil passage.

9. The fan according to claim 1, characterized in that: The fan also includes a stator connected to the outer annular surface of the bushing; the impeller also includes a rotor and fan blades, the fan blades being connected to the hub and corresponding to the stator circumferentially, so that the fan blades can interact with the stator and rotate.

10. An electronic device, characterized in that, include: A housing; electronic components disposed within the housing; a fan as described in claims 1-9, wherein the fan is disposed within the housing and is used to dissipate heat from the electronic components or the housing.

Images