CN214274027U

CN214274027U - Oil-retaining bearing sealing structure and fan thereof

Info

Publication number: CN214274027U
Application number: CN202120078465.4U
Authority: CN
Inventors: 郑敏生; 赖进龙; 林连凯
Original assignee: Taicang Xinhuaying Electronic Co Ltd
Current assignee: Taicang Xinhuaying Electronic Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-09-24
Anticipated expiration: 2031-01-13

Abstract

The embodiment of the utility model discloses an oil-retaining bearing sealing structure and a fan thereof, the oil-retaining bearing sealing structure comprises a shaft tube, an oil-retaining bearing, a rotating shaft and a metal ring, the oil-containing bearing is accommodated in the shaft tube, the rotating shaft is inserted in the oil-containing bearing and can rotate relative to the oil-containing bearing, the rotating shaft is provided with a ring groove corresponding to the opening of the oil-retaining bearing, the metal ring is sleeved on the periphery of the rotating shaft and positioned above the oil-retaining bearing, the inner edge of the metal ring is tightly attached to the upper part of the ring groove, the outer edge of the metal ring is tightly propped against the inner wall of the shaft tube, the oil-retaining bearing includes a shaft shoulder portion, a bearing portion, and a groove for connecting the shaft shoulder portion and the bearing portion, the inner circumference diameter of the shaft shoulder part is larger than that of the bearing part, and the annular groove, the metal ring, the shaft shoulder part and the groove form a second oil return area to prevent lubricating oil from running off.

Description

Oil-retaining bearing sealing structure and fan thereof

Technical Field

The utility model relates to a bearing field especially relates to an oiliness bearing sealing mechanism and fan thereof.

Background

The fan is a key component of a computer cooling system, and the improvement of the service life and the reliability of the fan are important to guarantee the stable operation of the computer system.

Because the oiliness bearing has the characteristics of low cost and low noise at the initial stage of operation, the fan widely adopts the oiliness bearing, and the oiliness bearing soaks lubricating oil in self space and realizes the bearing of self-lubricating, generally, the sealed effect of current bearing is unsatisfactory, can appear lubricating oil after operation a period and run off and lead to lacking lubricating oil between bearing and the pivot and then the problem that the bearing contacts with the pivot large tracts of land and produces great frictional force, influences the performance and the life of bearing.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a better oiliness bearing seal mechanism of sealing performance and adopt this oiliness bearing seal structure's fan.

The utility model discloses a first aspect of embodiment provides an oiliness bearing seal structure, including central siphon, oiliness bearing, pivot and becket, oiliness bearing accept in the central siphon, the pivot is inserted and is located in the oiliness bearing and can for the oiliness bearing rotates, the pivot is formed with the annular corresponding to oiliness bearing open position, becket cover locates the pivot periphery, is located oiliness bearing's top, becket's inner edge is hugged closely the upper portion of annular, becket's outer fringe tightly supports the central siphon inner wall, oiliness bearing includes the axle shoulder portion, bearing portion and the recess that is used for connecting axle shoulder portion and bearing portion, the interior circumference diameter of axle shoulder portion is greater than the interior circumference diameter of bearing portion, annular, becket, axle shoulder portion and recess form the second and return oil zone.

Optionally, a flow passage structure is arranged on the inner wall of the oil-retaining bearing or the outer wall of the rotating shaft, and the flow passage structure is filled with lubricating fluid.

Optionally, the outer wall of the oil-retaining bearing is provided with a first oil return groove, and the first oil return groove is communicated with the shaft hole of the oil-retaining bearing.

Optionally, the outer wall of the upper end of the shaft shoulder is provided with a second oil return groove, and the first oil return groove is communicated with the second oil return groove.

Optionally, the metal ring includes an inner ring and an outer ring sleeved on an outer edge of the inner ring, an inner hole is formed in the center of the inner ring, the metal ring is sleeved on the periphery of the rotating shaft through the inner hole, the thickness of the outer ring is greater than that of the inner ring, and the lower end face of the outer ring is in transitional connection with the lower end face of the inner ring through an inclined plane.

Optionally, the outer edge of the metal ring protrudes downwards to form a clamping portion, the clamping portion is clamped between the oil-retaining bearing and the shaft tube, and the clamping portion, the oil-retaining bearing and the inner wall of the shaft tube form a first oil return area.

Optionally, first boss and second boss have set gradually from the bottom up to the central siphon inner wall, oil bearing's bottom is arranged in on the first boss, the central siphon inner wall of second boss top, card sum portion and oil bearing outer wall form first oil return district.

Optionally, an oil storage area is formed between the first boss, the bottom of the oil-retaining bearing, the inner wall of the shaft tube and the outer wall of the rotating shaft.

Optionally, a gasket is further disposed between the bottom of the rotating shaft and the shaft tube.

A second aspect of the embodiment provides a fan, including fan shell, stator and fanning wheel, still include above-mentioned arbitrary oil-retaining bearing seal structure, the fan shell includes the bottom plate, the central siphon sets up on the bottom plate, the stator surround in the periphery of central siphon, the stator includes two at least magnetic pole pieces and the coil winding of winding on the magnetic pole piece, the fanning wheel includes wheel hub, wheel hub's interior week is provided with annular magnet, the pivot set up in wheel hub is last.

The embodiment of the utility model provides an among the technical scheme, the pivot is formed with the annular corresponding to oiliness bearing opening position, the metal ring cover is established in the pivot periphery, is located oiliness bearing's top, the inner edge card of metal ring is established annular overground portion, the outer fringe of metal ring tightly supports the central siphon inner wall, oiliness bearing includes the axle shoulder portion, bearing portion and the recess that is used for connecting axle shoulder portion and bearing portion, the interior circumference diameter of axle shoulder portion is greater than the interior circumference diameter of bearing portion, annular, metal ring, axle shoulder portion and recess form second oil return district, when lubricating oil moves to the pivot top along the pivot bottom under the effect of centrifugal force, because the existence in second oil return district, lubricating oil rebound's speed slows down, and because sheltering from of the metal ring, can prevent lubricating oil loss.

Drawings

Fig. 1 is a schematic view of an internal structure of a sealed fan with an oil bearing according to the present invention;

fig. 2 is a partial enlarged view of the fan employing the oil-impregnated bearing sealing structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides an oil bearing sealing mechanism, which includes a shaft tube 11, an oil bearing 12, a rotating shaft 21 and a metal ring 30, wherein the oil bearing 12 is accommodated in the shaft tube 11, the rotating shaft 21 is inserted into the oil bearing 12 and can rotate relative to the oil bearing 12, an annular groove 211 is formed in the opening position of the rotating shaft 21 corresponding to the oil bearing 12, the metal ring 30 is sleeved on the periphery of the rotating shaft 21 and located above the oil bearing 12, an inner edge of the metal ring 30 is tightly attached to an upper portion of the annular groove 211, an outer edge of the metal ring 30 tightly abuts against an inner wall of the shaft tube 11, the oil bearing 12 includes a shaft shoulder portion 121, a bearing portion 122 and a groove 123 for connecting the shaft shoulder portion 121 and the bearing portion 122, an inner circumferential diameter of the shaft shoulder portion 121 is greater than an inner circumferential diameter of the bearing portion 122, the annular groove 211 tightly abuts against an inner wall of the shaft tube 11, the oil bearing 12 includes a shaft shoulder portion 121, a bearing portion 122, and a groove 123 for connecting the shaft shoulder portion 121 and a groove 122, The metal ring 30, the shoulder 121 and the groove 123 form a second oil return area B.

The inner wall of oil bearing 12 or the outer wall of pivot 21 is equipped with the runner structure, the runner structural intussuseption is filled with lubricating fluid, for example lubricating oil, when lubricating oil moves to pivot 21 top by pivot 21 bottom under the effect of centrifugal force along pivot 21, when removing to second oil return district B, because second oil return district B's area is great, lubricating oil slows down at the speed that second oil return district B rises, and because the effect of blockking of annular 211, the rising speed of the lubricating oil that can further slow down, under the combined action of becket 30 and annular 211, prevent that lubricating oil outwards runs off.

The utility model discloses the upper end of central siphon 11 closely laminates with the card and the portion 31 of becket 30, central siphon 11, becket 30's card and portion 31, becket 30 and pivot 21 form a sealed route, prevent that lubricating oil runs off.

Referring to fig. 2, a first oil return groove is formed in an outer wall of the oil-retaining bearing 12, and the first oil return groove is communicated with a shaft hole of the oil-retaining bearing 12. Specifically, the outer wall of the shaft shoulder 121 is provided with a second oil return groove, and the first oil return groove is communicated with the second oil return groove.

The utility model discloses the metal ring 30 cover is established in pivot 21 periphery and is placed oil bearing 12's upper end, and oil bearing 12, pivot 21 forms second oil return district B, please refer to fig. 2 and show, the downward salient formation card sum portion 31 of outer fringe of metal ring 30, card sum portion 31 block arrives oil bearing 12 with between the central siphon 11, card sum portion 31, oil bearing 12 and the 11 inner walls of central siphon form first oil return district A.

The flow passage structure of the inner wall of the oil-retaining bearing 12 of the utility model is communicated with the first oil return groove of the outer wall of the oil-retaining bearing 12, the lubricating oil can be fully circulated in the first oil return groove, the second oil return groove and the flow passage, when the lubricant oil moves along the rotation shaft 21 from the bottom of the rotation shaft 21 to the top of the rotation shaft 21 by the centrifugal force, that is, toward the rotating shaft 21 of the opening portion of the oil-impregnated bearing 12, when the lubricating oil moves along the flow passage, since the area of the second oil returning area B is large, the rising speed of the lubricating oil in the second oil returning area B becomes slow, and when the lubricating oil moves upward to the position of the ring groove 211 of the rotating shaft 21, because the lubricant oil blocked by the ring groove 211 flows to the second oil return area B under the action of gravity, when the amount of the lubricant oil in the second oil return area B reaches a certain value, the lubricating oil flows into the first oil return region a via the second oil return groove on the shaft shoulder portion 121 and the first oil return groove of the outer wall of the oil-impregnated bearing 12. The utility model discloses when lubricating oil was along pivot 21 rebound, because annular 211, shaft shoulder 121 and recess 123's effect slowed down the foretell speed of lubricating oil, when lubricating oil volume was more, lubricating oil can backward flow, formed with a circulating oil way, prevented that lubricating oil runs off for sufficient circulation behind the lubricating oil ability, the lubricating oil supply of remain stable.

The utility model discloses a metal ring seals central siphon and oiliness bearing, designs first oil return district A and second oil return district B simultaneously, and lubricating oil can flow back, through dual leak protection oil structure, has ensured that lubricating oil is difficult for leaking, and can use for a long time.

The utility model discloses an in one of them embodiment, the inner wall from the bottom up of central siphon 11 has set gradually first boss 111 and second boss 112, and first boss 111 and second boss 112 fall into the triplex with central siphon 11 from the bottom up, are bottom 115 respectively, bearing location portion 114 and becket location portion 113, and wherein, bottom 115, bearing location portion 114 and becket location portion 113 grow in proper order to the distance of pivot 21 axial lead, the bottom of oiliness bearing 12 is arranged in on the first boss 111, central siphon 11 of second boss 112 top is exactly that becket location portion 113 highly is greater than the card and the portion 31 of becket 30, and the inner wall of becket location portion 113, card and portion 31 and oiliness bearing 12 outer wall form.

A gasket 14 is also arranged between the bottom of the rotating shaft 21 and the shaft tube 11. The utility model discloses first boss 111 is located the nearly third department of central siphon 11, the inner wall of the bottom 115 of central siphon 11, first boss 111, forms an oil reservoir C between the outer wall of gasket 14 and pivot 21. The utility model discloses the space between 12 distance gaskets 14 of oil-retaining bearing is bigger, that is to say that oil storage area C space is bigger for lubricating oil can fully circulate, the fuel feeding of remain stable.

The utility model discloses the reverse backward flow of lubricating oil flows to first oil return district A, and when first oil return district A's lubricating oil quantity was more, unnecessary lubricating oil can continue to flow to oil storage district C along first oil return groove, and lubricating oil stores in oil storage district C. The utility model discloses when lubricating oil along pivot 21 rebound, lubricating oil can backward flow, forms with a circulating oil way, and a large amount of oil storage district spaces in oil storage district C and increase first oil return district A for sufficient circulation behind the lubricating oil ability keeps stabilizing the lubricating oil supply.

The utility model discloses oil bearing 12 is made by the powder sintering, and concrete oil bearing 12 adopts nanometer zirconia powder, uses die and sintering process to make, and it is low to have surface hardness, and the air permeability is low, and the oilhole is tiny even, and is wear-resisting, high temperature resistant nonvolatile characteristics, has improved oil bearing's life.

The utility model discloses still provide a fan that adopts the oiliness bearing seal structure of above-mentioned each embodiment, the fan includes fan shell 23, stator 13 and fan wheel 24, and fan shell 23 has bottom plate 231 and sets up central siphon 11 on bottom plate 231, and central siphon 11 optional makes alone and assembles on bottom plate 231 or direct integrated into one piece on bottom plate 231. Oiliness bearing 12 sets up in central siphon 11 and hugs closely the inner wall setting of central siphon 11, stator 13 set up in fan-shell 23 and encircle in central siphon 11's periphery, fan-wheel 24 it has wheel hub and locates pivot 21 on the wheel hub, pivot 21 is rotatable insert locate in oiliness bearing 12, the top surface of pivot 21 corresponds oiliness bearing 12 open position and is formed with an annular 211, and the cover of becket 30 is established in pivot 21 periphery, is located oiliness bearing 12's top, the inner edge card of becket 30 is established in the annular 211, the outer fringe hoop of becket 30 is outstanding down and is formed a card and portion 31, card and portion 31 block arrive oiliness bearing 11 with between the central siphon 11.

The stator 13 is disposed around the shaft tube 11, and the stator 13 has at least one magnetic pole piece and a coil winding wound radially on the magnetic pole piece. The magnetic pole pieces are formed by laminating silicon steel pieces. The magnetic pole pieces extend radially to form a plurality of magnetic pole faces, and a pole gap is formed between the end parts of every two adjacent magnetic pole faces.

The coil winding is electrically connected with the circuit board, in one of the embodiments of the utility model, be provided with at least one inductive element on the circuit board, inductive element is used for the rotation state of induction rotor, and when the control circuit of circuit board switched on current, the current direction of the interactive control coil winding of control circuit of circuit board, and then makes the magnetic pole face of magnetic pole piece produce the magnetic field of alternation.

The utility model discloses an in one of them embodiment, no inductive element on the circuit board, control circuit detect back electromotive force, judge the zero crossing point according to back electromotive force, and the control motor carries out the commutation, and then the current direction of control coil winding for the magnetic pole face of magnetic pole piece produces the magnetic field of alternation.

The inner edge of the fan casing 23 is attached with a permanent magnet 22, the inner peripheral surface of the permanent magnet 22 has a plurality of N, S different pole regions, corresponding to the magnetic pole surfaces of the stator magnetic pole pieces, the alternating excitation of the magnetic pole surfaces can be used to drive the rotor to rotate.

The becket 30 includes card and portion 31 and becket body, card and portion 31 set up perpendicularly in the outer circumference of becket body, the becket body includes up end and lower terminal surface, the up end is planar structure, the up end of oil-retaining bearing's shaft shoulder 121 is arranged in to the lower terminal surface, the lower terminal surface includes inner ring and outer loop, the central authorities of inner ring are formed with the hole, becket 30 establishes on pivot 21 through the inner hole cover, specifically, becket 30's inner hole cover establishes in the top of the annular 211 of pivot 21, the outer loop is arranged in on the shaft shoulder 121, the inner ring of lower terminal surface and the annular 211 intercommunication of pivot 21 form first oil return district A. The thickness of the outer ring is larger than that of the inner ring, the outer ring and the inner ring are in smooth transition, and specifically, the outer edge plane 8 and the inner edge plane 9 are connected through a connecting inclined plane 10.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides an oiliness bearing seal structure, its characterized in that, includes the central siphon, oiliness bearing, pivot and becket, oiliness bearing accept in the central siphon, the pivot is inserted and is located oiliness bearing interior and can for oiliness bearing rotates, the pivot is formed with the annular corresponding to oiliness bearing open position, becket cover locates the pivot periphery, is located oiliness bearing's top, becket's inner edge is hugged closely the upper portion of annular, becket's outer fringe tightly supports the central siphon inner wall, oiliness bearing includes the shaft shoulder, holds the portion and is used for the recess of connecting shaft shoulder and bearing portion, the interior circumference diameter of shaft shoulder is greater than the interior circumference diameter of bearing portion, annular, becket, shaft shoulder and recess form the second oil return district.

2. The oil-impregnated bearing sealing structure according to claim 1, wherein a flow passage structure is provided on an inner wall of the oil-impregnated bearing or an outer wall of the rotating shaft, and the flow passage structure is filled with a lubricating fluid.

3. The oil-impregnated bearing sealing structure according to claim 2, wherein the outer wall of the oil-impregnated bearing is provided with a first oil return groove that communicates with the shaft hole of the oil-impregnated bearing.

4. The oil impregnated bearing sealing structure according to claim 3 wherein an outer wall of an upper end of said shaft shoulder portion is provided with a second oil return groove, said first oil return groove communicating with said second oil return groove.

5. The oil-retaining bearing sealing structure according to claim 1, wherein the metal ring includes an inner ring and an outer ring sleeved on an outer edge of the inner ring, an inner hole is formed in a center of the inner ring, the metal ring is sleeved on a periphery of the rotating shaft through the inner hole, a thickness of the outer ring is larger than a thickness of the inner ring, and a lower end surface of the outer ring is transitionally connected with a lower end surface of the inner ring through an inclined surface.

6. The oil impregnated bearing sealing structure according to claim 1 wherein an outer edge of said metal ring protrudes downward to form a catching portion, said catching portion being caught between said oil impregnated bearing and said shaft tube, said catching portion, said oil impregnated bearing and an inner wall of said shaft tube forming a first oil return area.

7. The oil-retaining bearing sealing structure according to claim 6, wherein a first boss and a second boss are sequentially arranged on the inner wall of the shaft tube from bottom to top, the bottom of the oil-retaining bearing is arranged on the first boss, and the inner wall, the clamping portion and the outer wall of the shaft tube above the second boss form a first oil return area.

8. The oil impregnated bearing sealing structure according to claim 7 wherein an oil reservoir is formed between the first boss, the bottom of the oil impregnated bearing, the inner wall of the shaft tube and the outer wall of the rotary shaft.

9. The oil impregnated bearing sealing structure according to claim 1, wherein a gasket is further provided between the bottom of the rotating shaft and the shaft tube.

10. A fan comprising a fan casing, a stator and a fan wheel, and further comprising the oiliness bearing sealing structure of any one of claims 1 to 9, wherein the fan casing comprises a bottom plate, the shaft tube is arranged on the bottom plate, the stator surrounds the periphery of the shaft tube, the stator comprises at least two magnetic pole pieces and a coil winding wound on the magnetic pole pieces, the fan wheel comprises a hub, the inner periphery of the hub is provided with a ring-shaped magnet, and the rotating shaft is arranged on the hub.