US20130142646A1 - Oil-retaining bearing fan structure - Google Patents
Oil-retaining bearing fan structure Download PDFInfo
- Publication number
- US20130142646A1 US20130142646A1 US13/311,198 US201113311198A US2013142646A1 US 20130142646 A1 US20130142646 A1 US 20130142646A1 US 201113311198 A US201113311198 A US 201113311198A US 2013142646 A1 US2013142646 A1 US 2013142646A1
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- United States
- Prior art keywords
- oil
- bearing
- shaft
- retaining bearing
- fan
- Prior art date
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- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/0626—Details of the lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
- F16C17/246—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to wear, e.g. sensors for measuring wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/46—Fans, e.g. ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
Definitions
- the present invention relates generally to an oil-retaining bearing fan structure, and more particularly to an oil-retaining bearing fan structure capable of reducing wear and lowering noises and vibration to prolong the lifetime of the fan structure.
- the central processing unit (CPU) in the computer host generates most of the heat generated by the computer host in operation.
- the temperature of the CPU will rise very quickly to cause deterioration of the execution efficiency.
- the computer will crash or even burn down in some more serious cases.
- the computer host is often enclosed in a computer case. This will affect the dissipation of the heat generated by the computer host. Therefore, it has become a critical issue how to quickly conduct out and dissipate the heat generated by the CPU and other heat-generating components.
- a heat sink and a cooling fan are arranged on the CPU to quickly dissipate heat.
- One side of the heat sink has multiple radiating fins, while the other side of the heat sink is free from any radiating fin.
- the surface of the other side of the heat sink directly contacts the CPU for conducting heat to the radiating fins.
- the radiating fins serve to dissipate the heat by way of radiation.
- the cooling fan cooperatively forcedly drives airflow to quickly carry away the heat.
- FIG. 1 is a perspective sectional assembled view of a conventional oil-retaining bearing cooling fan.
- the cooling fan 1 includes a fan base seat 11 .
- a bearing cup 111 protrudes from the fan base seat 11 .
- a bearing 12 is disposed in the bearing cup 111 .
- a fan impeller 13 is assembled with the fan base seat 11 .
- the fan impeller 13 has multiple blades 131 annularly arranged along outer circumference of the fan impeller 13 .
- the fan impeller 13 further has a shaft 132 extending from an inner side of the fan impeller 13 .
- the shaft 132 is disposed and located in the bearing 12 .
- An oil film 121 is filled between the bearing 12 and the shaft 132 .
- the relative position between the fan base seat 11 , the bearing 12 and the fan impeller 13 is tested and adjusted to an optimal operation position where the shaft 132 of the cooling fan 1 can stably rotate within the bearing 12 under support of the oil film 121 . Accordingly, in operation of the cooling fan 1 , the shaft 132 rotates within the bearing 12 in an operation position relative to the bearing 12 only under the support force of the oil film 121 . However, the support force of the oil film 121 provided for the shaft 132 is smaller than the eccentric force applied to the shaft 132 in operation of the cooling fan 1 . Therefore, the shaft 132 and the bearing 12 will still abrade and collide each other.
- the shaft 132 will collide the bearing 12 and vibrate in operation. Under such circumstance, in operation, the cooling fan 1 will vibrate and make noises due to the deflection of the shaft 132 . Moreover, the wear between the shaft 132 and the bearing 12 will be increased to shorten lifetime of the cooling fan 1 .
- the shaft 132 may be restored to its optimal operation position under the support force of the oil film 121 . However, after squeezed, it takes longer time for the oil film 121 to recover so that the shaft 132 also needs longer time to restore to its optimal operation position. As a result, the lasting time of the noises and wear will be longer.
- the conventional oil-retaining bearing cooling fan has the following shortcomings:
- the conventional oil-retaining bearing cooling fan tends to vibrate and make noises.
- the conventional oil-retaining bearing cooling fan is more subject to wear.
- a primary object of the present invention is to provide an oil-retaining bearing fan structure including at least one magnetic member.
- the magnetic member serves to apply a magnetic attraction force to a shaft of the fan structure to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- a further object of the present invention is to provide the above oil-retaining bearing fan structure, which can quickly restore to a stably operating state.
- the oil-retaining bearing fan structure of the present invention includes a fan base seat, at least one oil-retaining bearing, at least one magnetic member and a fan impeller.
- the fan base seat has a bearing cup on one side.
- the bearing cup has a bearing hole.
- the oil-retaining bearing is disposed in the bearing hole.
- the oil-retaining bearing has a shaft hole.
- the magnetic member is disposed between the oil-retaining bearing and a wall of the bearing hole.
- the fan impeller has multiple blades and a shaft.
- the shaft is rotatably disposed in the shaft hole.
- the magnetic member serves to apply a magnetic attraction force to the shaft to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- the present invention has the following advantages:
- FIG. 1 is a perspective sectional assembled view of a conventional oil-retaining bearing cooling fan
- FIG. 2 is a perspective sectional assembled view of a first embodiment of the present invention
- FIG. 3 is a perspective sectional assembled view of a part of the first embodiment of the present invention.
- FIG. 4 is a perspective sectional assembled view of a second embodiment of the present invention.
- FIG. 5 is a perspective sectional assembled view of a part of the second embodiment of the present invention.
- FIG. 6 is a perspective sectional assembled view of a third embodiment of the present invention.
- FIG. 7 is a perspective sectional assembled view of a part of the third embodiment of the present invention.
- FIG. 2 is a perspective sectional assembled view of a first embodiment of the present invention.
- FIG. 3 is a perspective sectional assembled view of a part of the first embodiment of the present invention.
- the oil-retaining bearing fan structure 2 of the present invention includes a fan base seat 21 , an oil-retaining bearing 22 , at least one magnetic member 23 and a fan impeller 24 .
- the fan base seat 21 has a bearing cup 211 on one side.
- the bearing cup 211 has an internal bearing hole 2111 in which the oil-retaining bearing 22 is disposed.
- the oil-retaining bearing 22 has an internal shaft hole 221 .
- the magnetic member 23 is disposed between the oil-retaining bearing 22 and a wall of the bearing hole 2111 . In this embodiment, the magnetic member 23 is fitted around an outer circumference of the oil-retaining bearing 22 . That is, the magnetic member 23 is disposed between the wall of the bearing hole 2111 and the oil-retaining bearing 22 .
- one single magnetic member 23 is fitted around the outer circumference of the oil-retaining bearing 22 .
- the magnetic member 23 is selected from a group consisting of magnetic iron, magnetic powder body and magnet.
- the fan impeller 24 includes multiple blades 241 and a shaft 242 .
- the blades 241 are annularly arranged along outer circumference of the fan impeller 24 .
- the fan impeller 24 is disposed on the bearing cup 211 with the shaft 242 rotatably disposed in the shaft hole 221 .
- a hydraulic layer 222 which is an oil film, is filled between the shaft 242 and a wall of the shaft hole 221 .
- the shaft 242 When mounting the shaft 242 into the shaft hole 221 , it is necessary to test and adjust the relative position between the fan base seat 21 , the oil-retaining bearing 22 and the fan impeller 24 to an optimal operation position.
- the magnetic member 23 fitted around the outer circumference of the oil-retaining bearing 22 applies a magnetic attraction force to the shaft 242 .
- the hydraulic layer 222 provides a support force for the shaft 242 .
- the shaft 242 can be effectively located in the optimal operation position.
- the shaft 242 In operation of the fan impeller 24 , under the magnetic attraction force of the magnetic member 23 , the shaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of the shaft 242 within the oil-retaining bearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- the shaft 242 will collide the oil-retaining bearing 22 and vibrate.
- the magnetic member 23 will apply a magnetic attraction force to the shaft 242 , making the shaft 242 quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- FIG. 4 is a perspective sectional assembled view of a second embodiment of the present invention.
- FIG. 5 is a perspective sectional assembled view of a part of the second embodiment of the present invention.
- the second embodiment is substantially identical to the first embodiment in component, connection relationship and operation and thus will not be repeatedly described hereinafter.
- the second embodiment is different from the first embodiment in that the magnetic member 23 is arranged in accordance with the configuration of the oil-retaining bearing 22 .
- a middle section of the oil-retaining bearing 22 attaches to the bearing cup 211 , while gaps are defined between two ends of the oil-retaining bearing 22 and the wall of the bearing hole 2111 .
- the magnetic members 23 are positioned in the gaps between the oil-retaining bearing 22 and the wall of the bearing hole 2111 . That is, the magnetic members 23 are fitted around two ends of the oil-retaining bearing 22 .
- the shaft 242 is rotatably disposed in the shaft hole 221 .
- the hydraulic layer 222 is filled between the shaft 242 and the wall of the shaft hole 221 .
- the hydraulic layer 222 provides a support force for the shaft 242 .
- the shaft 242 can be effectively located in the optimal operation position.
- the shaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of the shaft 242 within the oil-retaining bearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- the magnetic members 23 fitted around two ends of the oil-retaining bearing 22 will apply a magnetic attraction force to the shaft 242 to make the shaft 242 quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- FIG. 6 is a perspective sectional assembled view of a third embodiment of the present invention.
- FIG. 7 is a perspective sectional assembled view of a part of the third embodiment of the present invention.
- the third embodiment is substantially identical to the first embodiment in component, connection relationship and operation and thus will not be repeatedly described hereinafter.
- the third embodiment is different from the first embodiment in that the magnetic member 23 is disposed between the oil-retaining bearing 22 and the wall of bearing hole 2111 .
- the magnetic member 23 is fitted around one end of the oil-retaining bearing 22 .
- the shaft 242 is located in the optimal operation position by means of the magnetic member 23 .
- the shaft 242 In operation of the fan impeller 24 , under the magnetic attraction force of the magnetic member 23 , the shaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of the shaft 242 within the oil-retaining bearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An oil-retaining bearing fan structure includes a fan base seat, an oil-retaining bearing and at least one magnetic member. The oil-retaining bearing is disposed in a bearing hole of the fan base seat. The magnetic member is disposed between the oil-retaining bearing and a wall of the bearing hole. The magnetic member serves to apply a magnetic attraction force to a shaft of the fan structure to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
Description
- 1. Field of the Invention
- The present invention relates generally to an oil-retaining bearing fan structure, and more particularly to an oil-retaining bearing fan structure capable of reducing wear and lowering noises and vibration to prolong the lifetime of the fan structure.
- 2. Description of the Related Art
- Recently, all kinds of electronic information products (such as computers) have been more and more popularly used and widely applied to various fields. There is a trend to increase processing speed and expand access capacity of the electronic information products. Therefore, the electronic components of the electronic information products have operated at higher and higher speed. When operating at high speed, the electronic components generate high heat at the same time.
- With a computer host taken as an example, the central processing unit (CPU) in the computer host generates most of the heat generated by the computer host in operation. In case the heat is not efficiently dissipated, the temperature of the CPU will rise very quickly to cause deterioration of the execution efficiency. When the accumulated heat exceeds a tolerable limit, the computer will crash or even burn down in some more serious cases.
- Moreover, for solving the problem of electromagnetic radiation, the computer host is often enclosed in a computer case. This will affect the dissipation of the heat generated by the computer host. Therefore, it has become a critical issue how to quickly conduct out and dissipate the heat generated by the CPU and other heat-generating components.
- Conventionally, a heat sink and a cooling fan are arranged on the CPU to quickly dissipate heat. One side of the heat sink has multiple radiating fins, while the other side of the heat sink is free from any radiating fin. The surface of the other side of the heat sink directly contacts the CPU for conducting heat to the radiating fins. The radiating fins serve to dissipate the heat by way of radiation. In addition, the cooling fan cooperatively forcedly drives airflow to quickly carry away the heat.
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FIG. 1 is a perspective sectional assembled view of a conventional oil-retaining bearing cooling fan. The cooling fan 1 includes afan base seat 11. Abearing cup 111 protrudes from thefan base seat 11. Abearing 12 is disposed in thebearing cup 111. Afan impeller 13 is assembled with thefan base seat 11. Thefan impeller 13 hasmultiple blades 131 annularly arranged along outer circumference of thefan impeller 13. Thefan impeller 13 further has ashaft 132 extending from an inner side of thefan impeller 13. Theshaft 132 is disposed and located in thebearing 12. Anoil film 121 is filled between thebearing 12 and theshaft 132. The relative position between thefan base seat 11, thebearing 12 and thefan impeller 13 is tested and adjusted to an optimal operation position where theshaft 132 of the cooling fan 1 can stably rotate within thebearing 12 under support of theoil film 121. Accordingly, in operation of the cooling fan 1, theshaft 132 rotates within thebearing 12 in an operation position relative to thebearing 12 only under the support force of theoil film 121. However, the support force of theoil film 121 provided for theshaft 132 is smaller than the eccentric force applied to theshaft 132 in operation of the cooling fan 1. Therefore, theshaft 132 and thebearing 12 will still abrade and collide each other. Also, in case the cooling fan 1 is collided by an alien article to make theshaft 132 deflected from its true position, theshaft 132 will collide thebearing 12 and vibrate in operation. Under such circumstance, in operation, the cooling fan 1 will vibrate and make noises due to the deflection of theshaft 132. Moreover, the wear between theshaft 132 and thebearing 12 will be increased to shorten lifetime of the cooling fan 1. Theshaft 132 may be restored to its optimal operation position under the support force of theoil film 121. However, after squeezed, it takes longer time for theoil film 121 to recover so that theshaft 132 also needs longer time to restore to its optimal operation position. As a result, the lasting time of the noises and wear will be longer. - According to the above, the conventional oil-retaining bearing cooling fan has the following shortcomings:
- 1. The conventional oil-retaining bearing cooling fan tends to vibrate and make noises.
- 2. The conventional oil-retaining bearing cooling fan is more subject to wear.
- 3. The noises made by the conventional oil-retaining bearing cooling fan will last longer.
- 4. The lifetime of the conventional oil-retaining bearing cooling fan is shorter.
- A primary object of the present invention is to provide an oil-retaining bearing fan structure including at least one magnetic member. The magnetic member serves to apply a magnetic attraction force to a shaft of the fan structure to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- A further object of the present invention is to provide the above oil-retaining bearing fan structure, which can quickly restore to a stably operating state.
- To achieve the above and other objects, the oil-retaining bearing fan structure of the present invention includes a fan base seat, at least one oil-retaining bearing, at least one magnetic member and a fan impeller. The fan base seat has a bearing cup on one side. The bearing cup has a bearing hole. The oil-retaining bearing is disposed in the bearing hole. The oil-retaining bearing has a shaft hole. The magnetic member is disposed between the oil-retaining bearing and a wall of the bearing hole. The fan impeller has multiple blades and a shaft. The shaft is rotatably disposed in the shaft hole. The magnetic member serves to apply a magnetic attraction force to the shaft to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged.
- According to the above arrangement, the present invention has the following advantages:
- 1. The noises and vibration of the fan structure are lowered.
- 2. The wear of the fan structure is reduced.
- 3. The lasting time of the noises is shortened.
- 4. The lifetime of the fan structure is prolonged.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
-
FIG. 1 is a perspective sectional assembled view of a conventional oil-retaining bearing cooling fan; -
FIG. 2 is a perspective sectional assembled view of a first embodiment of the present invention; -
FIG. 3 is a perspective sectional assembled view of a part of the first embodiment of the present invention; -
FIG. 4 is a perspective sectional assembled view of a second embodiment of the present invention; -
FIG. 5 is a perspective sectional assembled view of a part of the second embodiment of the present invention; -
FIG. 6 is a perspective sectional assembled view of a third embodiment of the present invention; and -
FIG. 7 is a perspective sectional assembled view of a part of the third embodiment of the present invention. - Please refer to
FIGS. 2 and 3 .FIG. 2 is a perspective sectional assembled view of a first embodiment of the present invention.FIG. 3 is a perspective sectional assembled view of a part of the first embodiment of the present invention. According to the first embodiment, the oil-retainingbearing fan structure 2 of the present invention includes afan base seat 21, an oil-retainingbearing 22, at least onemagnetic member 23 and afan impeller 24. Thefan base seat 21 has a bearingcup 211 on one side. The bearingcup 211 has aninternal bearing hole 2111 in which the oil-retainingbearing 22 is disposed. The oil-retainingbearing 22 has aninternal shaft hole 221. Themagnetic member 23 is disposed between the oil-retainingbearing 22 and a wall of thebearing hole 2111. In this embodiment, themagnetic member 23 is fitted around an outer circumference of the oil-retainingbearing 22. That is, themagnetic member 23 is disposed between the wall of thebearing hole 2111 and the oil-retainingbearing 22. - In this embodiment, one single
magnetic member 23 is fitted around the outer circumference of the oil-retainingbearing 22. Themagnetic member 23 is selected from a group consisting of magnetic iron, magnetic powder body and magnet. Thefan impeller 24 includesmultiple blades 241 and ashaft 242. Theblades 241 are annularly arranged along outer circumference of thefan impeller 24. Thefan impeller 24 is disposed on the bearingcup 211 with theshaft 242 rotatably disposed in theshaft hole 221. Ahydraulic layer 222, which is an oil film, is filled between theshaft 242 and a wall of theshaft hole 221. When mounting theshaft 242 into theshaft hole 221, it is necessary to test and adjust the relative position between thefan base seat 21, the oil-retainingbearing 22 and thefan impeller 24 to an optimal operation position. When adjusting the position, themagnetic member 23 fitted around the outer circumference of the oil-retainingbearing 22 applies a magnetic attraction force to theshaft 242. In the meantime, thehydraulic layer 222 provides a support force for theshaft 242. By means of the magnetic attraction force of themagnetic member 23 and the support force of thehydraulic layer 222, theshaft 242 can be effectively located in the optimal operation position. In operation of thefan impeller 24, under the magnetic attraction force of themagnetic member 23, theshaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of theshaft 242 within the oil-retainingbearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged. - On the other hand, in case in the oil-retaining
bearing fan structure 2 is collided by an alien article to make theshaft 242 deflected from its true position, theshaft 242 will collide the oil-retainingbearing 22 and vibrate. Under such circumstance, themagnetic member 23 will apply a magnetic attraction force to theshaft 242, making theshaft 242 quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged. - Please refer to
FIGS. 4 and 5 .FIG. 4 is a perspective sectional assembled view of a second embodiment of the present invention.FIG. 5 is a perspective sectional assembled view of a part of the second embodiment of the present invention. The second embodiment is substantially identical to the first embodiment in component, connection relationship and operation and thus will not be repeatedly described hereinafter. The second embodiment is different from the first embodiment in that themagnetic member 23 is arranged in accordance with the configuration of the oil-retainingbearing 22. In this embodiment, a middle section of the oil-retainingbearing 22 attaches to the bearingcup 211, while gaps are defined between two ends of the oil-retainingbearing 22 and the wall of thebearing hole 2111. Accordingly, themagnetic members 23 are positioned in the gaps between the oil-retainingbearing 22 and the wall of thebearing hole 2111. That is, themagnetic members 23 are fitted around two ends of the oil-retainingbearing 22. Theshaft 242 is rotatably disposed in theshaft hole 221. Thehydraulic layer 222 is filled between theshaft 242 and the wall of theshaft hole 221. When mounting theshaft 242 into theshaft hole 221, it is necessary to test and adjust the relative position between thefan base seat 21, the oil-retainingbearing 22 and thefan impeller 24 to an optimal operation position. When adjusting the position, themagnetic members 23 fitted around two ends of the oil-retainingbearing 22 apply a magnetic attraction force to theshaft 242. In the meantime, thehydraulic layer 222 provides a support force for theshaft 242. By means of the magnetic attraction force of themagnetic members 23 and the support force of thehydraulic layer 222, theshaft 242 can be effectively located in the optimal operation position. In operation of thefan impeller 24, under the magnetic attraction force of themagnetic members 23, theshaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of theshaft 242 within the oil-retainingbearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged. On the other hand, in case in the oil-retainingbearing fan structure 2 is collided by an alien article to make theshaft 242 deflected from its true position, themagnetic members 23 fitted around two ends of the oil-retainingbearing 22 will apply a magnetic attraction force to theshaft 242 to make theshaft 242 quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged. - Please refer to
FIGS. 6 and 7 .FIG. 6 is a perspective sectional assembled view of a third embodiment of the present invention.FIG. 7 is a perspective sectional assembled view of a part of the third embodiment of the present invention. The third embodiment is substantially identical to the first embodiment in component, connection relationship and operation and thus will not be repeatedly described hereinafter. The third embodiment is different from the first embodiment in that themagnetic member 23 is disposed between the oil-retainingbearing 22 and the wall of bearinghole 2111. In this embodiment, themagnetic member 23 is fitted around one end of the oil-retainingbearing 22. Theshaft 242 is located in the optimal operation position by means of themagnetic member 23. In operation of thefan impeller 24, under the magnetic attraction force of themagnetic member 23, theshaft 242 can be kept in the optimal operation position. Accordingly, the stability of operation of theshaft 242 within the oil-retainingbearing 22 can be enhanced to reduce wear and lower the noises and vibration of the fan structure in operation. Therefore, the lifetime of the fan structure can be prolonged. - The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. It is understood that many changes and modifications of the above embodiments can be made without departing from the spirit of the present invention. The scope of the present invention is limited only by the appended claims.
Claims (6)
1. An oil-retaining bearing fan structure comprising:
a fan base seat having a bearing cup on one side, the bearing cup having a bearing hole;
an oil-retaining bearing disposed in the bearing hole, the oil-retaining bearing having a shaft hole;
at least one magnetic member disposed between a wall of the bearing hole and the oil-retaining bearing; and
a fan impeller having multiple blades and a shaft, the shaft being rotatably disposed in the shaft hole.
2. The oil-retaining bearing fan structure as claimed in claim 1 , wherein a hydraulic layer is filled between the shaft and a wall of the shaft hole.
3. The oil-retaining bearing fan structure as claimed in claim 1 , wherein the magnetic member is selected from a group consisting of magnetic iron, magnetic powder body and magnet.
4. The oil-retaining bearing fan structure as claimed in claim 1 , wherein the magnetic member is fitted around an outer circumference of the oil-retaining bearing.
5. The oil-retaining bearing fan structure as claimed in claim 4 , wherein the magnetic members are fitted around two ends of the oil-retaining bearing.
6. The oil-retaining bearing fan structure as claimed in claim 4 , wherein the magnetic member is fitted around one end of the oil-retaining bearing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/311,198 US20130142646A1 (en) | 2011-12-05 | 2011-12-05 | Oil-retaining bearing fan structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/311,198 US20130142646A1 (en) | 2011-12-05 | 2011-12-05 | Oil-retaining bearing fan structure |
Publications (1)
Publication Number | Publication Date |
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US20130142646A1 true US20130142646A1 (en) | 2013-06-06 |
Family
ID=48524135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/311,198 Abandoned US20130142646A1 (en) | 2011-12-05 | 2011-12-05 | Oil-retaining bearing fan structure |
Country Status (1)
Country | Link |
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US (1) | US20130142646A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5994803A (en) * | 1997-08-26 | 1999-11-30 | Samsung Electro-Mechanics Co. Ltd. | Brushless DC motor |
US6340854B1 (en) * | 2000-03-27 | 2002-01-22 | Samsung-Electro-Mechanics Co., Ltd. | Scanner motor |
US6356408B1 (en) * | 1998-09-03 | 2002-03-12 | Hitachi, Ltd. | Magnetic disk apparatus, including spindle motor having air flow passage in hub for pressure balance |
US6567268B1 (en) * | 2002-05-15 | 2003-05-20 | Hsieh Hsin-Mao | Cooling fan with magnetic liquid |
US6700241B1 (en) * | 2002-11-27 | 2004-03-02 | Sunonwealth Electric Machine Industry Co., Ltd. | Positioning device for prestressing magnet of spindle motor |
US20040189125A1 (en) * | 2002-08-30 | 2004-09-30 | Benno Doemen | Device comprising a plain bearing |
US6982505B2 (en) * | 2004-02-13 | 2006-01-03 | Sunonwealth Electric Machine Industry Co., Ltd. | Prestressing structure for rotationally balancing a motor |
-
2011
- 2011-12-05 US US13/311,198 patent/US20130142646A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5994803A (en) * | 1997-08-26 | 1999-11-30 | Samsung Electro-Mechanics Co. Ltd. | Brushless DC motor |
US6356408B1 (en) * | 1998-09-03 | 2002-03-12 | Hitachi, Ltd. | Magnetic disk apparatus, including spindle motor having air flow passage in hub for pressure balance |
US6340854B1 (en) * | 2000-03-27 | 2002-01-22 | Samsung-Electro-Mechanics Co., Ltd. | Scanner motor |
US6567268B1 (en) * | 2002-05-15 | 2003-05-20 | Hsieh Hsin-Mao | Cooling fan with magnetic liquid |
US20040189125A1 (en) * | 2002-08-30 | 2004-09-30 | Benno Doemen | Device comprising a plain bearing |
US6700241B1 (en) * | 2002-11-27 | 2004-03-02 | Sunonwealth Electric Machine Industry Co., Ltd. | Positioning device for prestressing magnet of spindle motor |
US6982505B2 (en) * | 2004-02-13 | 2006-01-03 | Sunonwealth Electric Machine Industry Co., Ltd. | Prestressing structure for rotationally balancing a motor |
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Legal Events
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AS | Assignment |
Owner name: ASIA VITAL COMPONENTS CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANG, BOR-HAW;LIU, SHU-FEN;REEL/FRAME:027322/0013 Effective date: 20111201 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |