CN1153012C - Dynamic and static pressure fluid bearing and its making process - Google Patents
Dynamic and static pressure fluid bearing and its making process Download PDFInfo
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- CN1153012C CN1153012C CNB011314915A CN01131491A CN1153012C CN 1153012 C CN1153012 C CN 1153012C CN B011314915 A CNB011314915 A CN B011314915A CN 01131491 A CN01131491 A CN 01131491A CN 1153012 C CN1153012 C CN 1153012C
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- static pressure
- pressure fluid
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Abstract
The present invention relates to a hydrodynamic and hydrostatic mixed pressure fluid bearing and a making method thereof, which utilizes a bush surface inside a bearing seat to engrave a penetrating hydrodynamic groove so as to greatly reduce the difficulty in processing a superfine groove. In addition, after the bearing seat and the bush are combined, and the surface of porous material is externally pressurized by using gas and applying the characteristic that the porous material can contain a lubrication medium; after hermetization, the lubrication medium is forced to be filled in the clearance between the bush and a shaft center by the prepressurization of the gas so as to achieve the effect that the bearing has fluid lubrication and support in relation to the shaft center.
Description
Technical field
The present invention relates to a kind of FDB and manufacture method thereof that is applied to small-sized spindle motor, particularly relate to a kind of have sound mixed pressure effect and dynamic and static pressure fluid bearing that is easy to process and manufacture method thereof.
Background technique
Bearing (bearing) is a kind of being applied on the rotating mechanism, is used for the parts that support, reduce friction and bear load, for example is applied in spindle motor etc.And along with being showing improvement or progress day by day of science and technology, relative part is more and more littler, and is accurate more, but the relative precision that requires bearing is more and more higher; In general, the bearing of precision prescribed is modal to be ball bearing, but but have some problems, includes that noise is big, rotating accuracy is not enough and the miniaturization cost is high excessively, can't meet small-sized and accurate requirement.In order to reach above-mentioned requirements, and further lower the friction of rotating, FDB also produces thereupon, its not only the precision height, noise is low and shock resistance is strong.
FDB roughly has two kinds, static pressure and Hydrodynamic bearing.Hydrostatic bearing is that static lower bearing inside just has the fluid lubrication medium, during rotation, can utilize the pressure support of fluid to play the axle center, if desaxe then makes the axle center return back to the tram in the pressurization of skew side.But because have a large amount of fluid lubrication media, so for general small-sized and require accurate rotating mechanism and be not suitable in static lower bearing inside.And being brearing bore, hydraulic bearing partly has trickle groove, and groove inside has lubricant medium (because be trickle groove, so the amount of lubricant medium is quite few), when rotating in the axle center, lubricant medium in the groove can be drawn, thereby produce a dynamic pressure, and the axle center is supported on the position of central authorities.But, because be the dynamic pressure relation, so when just having started in the axle center, pressure does not produce as yet, thus can cause abrasion, and make quite difficulty of endoporus processing in bearing inside, precision is difficult to grasp (in general, groove width is about 10 μ m, and the degree of depth is then littler), and oil sealing and oiling all are problems.
These problems at the hydraulic bearing existence, prior art provides many different settling modes, especially process the part of trickle groove at brearing bore, processing mode or the like behind cutter processing mode, rolling processing mode, plastic cement shoot mode, forms of corrosion, compound mode, the plated film is for example arranged.No matter be which kind of mode, all be to utilize endoporus processing, so the wayward and difficult processing of precision and pattern; More can't effectively solve the problem that starts abrasion and oiling and oil sealing, make the application of bearing of small-sized active motor, for example CD drive, hard disk drive etc. are restricted always.
Summary of the invention
The objective of the invention is provides a kind of dynamic and static pressure fluid bearing and manufacture method thereof for addressing the above problem, and has the inner hole groove of the bearing that is easy to process, and the effect of sound mixed pressure can be provided.
Above-mentioned purpose of the present invention is achieved in that a kind of dynamic and static pressure fluid bearing, is used to install an axle center, and this FDB includes:
One bearing support, inside includes lubricant medium; And
One lining places this bearing support, has a plurality of dynamic pressure grooves, and this dynamic pressure groove penetrates this lining, thereby makes this lubricant medium be stored in this dynamic pressure groove, and is installed in this lining with rotating form for this axle center.
Dynamic and static pressure fluid bearing of the present invention, wherein this bearing support is inner for having porous material.
Dynamic and static pressure fluid bearing of the present invention, wherein this bearing support includes a sealing unit.
Dynamic and static pressure fluid bearing of the present invention, wherein the sealing unit is a sealer.
Dynamic and static pressure fluid bearing of the present invention, wherein this lining is a tubular lining.
Dynamic and static pressure fluid bearing of the present invention, wherein this dynamic pressure groove is two pairs of lambdoid grooves.
A kind of manufacture method of dynamic and static pressure fluid bearing includes the following step at least:
Form a lining;
Processing produces a plurality of dynamic pressure grooves that penetrate on this lining;
This lining is incorporated into one to have in the bearing support of lubricant medium;
Install an axle center in this lining after, this bearing support is applied a precompressed and being sealed.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this lining is a tubular lining.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this dynamic pressure groove is to utilize cutter to be processed to form.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this dynamic pressure groove is to utilize etching mode to form.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this dynamic pressure groove is two pairs of lambdoid grooves.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this bearing support inside is to have porous material.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this lining can utilize the mode of directly being inserted in, and is incorporated in this bearing support.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, wherein this lining can utilize the mode of extruding sintering, is incorporated in this bearing support.
This shows, according to dynamic and static pressure fluid bearing of the present invention, include a bearing support and a lining, be used to install an axle center, bearing support inside is porous material, stores lubricant medium, lining is installed in bearing support inside, and has the dynamic pressure groove that penetrates on the lining, because be the dynamic pressure groove that penetrates, so be easy to processing; And seal after bearing support applied a precompressed, make inner lubricant medium under static state, can be kept between lining and the axle center, the support of static pressure is provided, and does not have the phenomenon that starts abrasion via the dynamic pressure groove of lining; And when rotated in the axle center, lubricant medium also can be set up a dynamic pressure in the dynamic pressure groove, thereby supported the axle center; Because be to inject lubricant medium by bearing support, and pressurization and oil sealing, make replenishing of lubricant medium reach sealing and be more prone to.
The manufacture method of dynamic and static pressure fluid bearing of the present invention, a lining at first is shaped, and on lining, be processed to form a plurality of dynamic pressure grooves, then lining is incorporated in the bearing support with lubricant medium, and install an axle center in lining, this bearing support is applied a precompressed also sealed; Because on lining, process the dynamic pressure groove that penetrates separately, so it is quite easy to process, and the whole inner utilization of bearing support porous material while include lubricant medium, oiling and oil sealing are quite easy, add bearing support is applied a precompressed, an amount of lubricant medium pressurization can be kept between lining and the axle center, thereby avoiding producing starts abrasion, makes FDB have the effect of dynamic pressure and static pressure.
Below in conjunction with accompanying drawing, purpose of the present invention, structure characteristics and function thereof are elaborated.
Description of drawings
Fig. 1 is a schematic representation of the present invention;
Fig. 2 is the schematic representation of lining of the present invention;
Fig. 3 is a static pressure effect schematic representation of the present invention;
Fig. 4 is a flow chart of steps of the present invention;
Fig. 5 A～5G is the schematic representation of manufacture method of the present invention.
Embodiment
Dynamic and static pressure fluid bearing of the present invention and manufacture method thereof, as shown in Figure 1, include a bearing support 20 and a lining 30, be used to install an axle center, bearing support 20 is a shaped as frame haply, inner constitute, can preserve lubricant medium 50, one sides and utilize sealing unit 70 to be sealed to prevent that lubricant medium 50 is excessive by porous material 40; Porous material 40 central authorities have a space, for lining 30 installings, lining 30 is cylindric haply, use for axle center 10 installings, and lining 30 surfaces have the dynamic pressure groove 301 that penetrates, make the porous material 40 interior lubricant mediums 50 that contained to ooze out via dynamic pressure groove 301, reach the lubricated effect that supports.
In other words, lining 30 is the modes that are different from known endoporus processing, the mode (as shown in Figure 2) that adopts processing separately to penetrate, refill be located at bearing support 20 after, the same bore area in installing axle center 10 that makes has dynamic pressure groove 301, but can be by lining 30 outside processing separately, it is convenient to make manufacturing go up, and manufacture is diversification more also, and can be too not little because of being subject to the endoporus aperture, and has limited to the form of dynamic pressure groove 301 and the validity of dynamic pressure groove 301.As shown in Figure 2, the form of dynamic pressure groove 301 is " people " font groove, can be installed in its inner axle center 10 when relatively rotating, make the lubricant medium 50 of dynamic pressure groove 301 both sides concentrate to central authorities, and produce a dynamic pressure, axle center 10 is supported on lining 30 central authorities, provide lubricated and support, the location, and " people " font groove shown in the figure only is an embodiment, do not limit and be this kind form, as long as can when rotate, produce a dynamic pressure and get final product, and because lining 30 is from external process, so also variation more of the form of dynamic pressure groove 301.
Bearing support 20 inside are porous material 40, porous material 40 contains lubricant medium 50 (for example being lubricant oil or the like), before the sealing, porous material 40 to bearing support 20 applies a precompressed 60 (for example utilizing external air pressure to stress on modes such as porous material 40 surfaces), utilize sealing unit 70 to be sealed again, for example can be sealer or sealing cover or the like (or as shown in the figure, whole porous material 40 being sealed), prevent that lubricant medium 50 is excessive.Because apply the reason of a precompressed 60, lubricant medium 50 can be flowed out by the dynamic pressure groove 301 of lining 30, and be kept between lining 30 and the axle center 10 (because of viscous force and barometric pressure equilibrium of forces, so this precompressed is slightly larger than ambient pressure), as shown in Figure 3, as previously mentioned, dynamic pressure groove 301 is quite trickle, so lubricant medium 50 can be similar to the capillary phenomenon and be kept between lining 30 and the axle center 10, and can be by adjusting the pressure size of precompressed 60, can adjust best lubricant medium 50 and be kept at amount between lining 30 and the axle center 10; So, can make under static state, when does not just rotate as yet in axle center 10, provide static pressure protection, and prevent from the startup loss of hydraulic bearing to produce the effect of sound mixed pressure.On the other hand, adopt porous material 40 to contain the mode of lubricant medium 50 because be, so oiling and oil sealing are all quite easy, and porous material 40 also provides the function of a lubricated oil depot, when the lubricant medium 50 between lining 30 and axle center 10 has loss, by the pressure of precompressed 60, lubricant medium 50 is extruded, replenish the storage (known hydraulic bearing must again by the external complement oil mass) of lubricant medium 50 between lining 30 and the axle center 10 immediately.
As shown in Figure 4, the manufacture method of dynamic and static pressure fluid bearing of the present invention, at first form a lining (step 901), form the tubular lining 30 (shown in Fig. 5 A) of a suitable thickness t, then processing produces a plurality of dynamic pressure grooves 301 (step 902) that penetrate on lining 30, as previously mentioned, the form of dynamic pressure groove 301 can be quite a lot of, shown in the figure two groups of lambdoid grooves, and the mode of processing, can utilize cutter processing or etching forming or the like, because be the groove that penetrates by lining 30 external process,, the mode (shown in Fig. 5 B) of all right one way or the other enforcement is only proposed at this so mode is not limited to, then remove the burr after lining 30 is processed, be beneficial to installing (shown in Fig. 5 C).
Then lining 30 being attached to one has in the bearing support 20 of lubricant medium 50 (step 903), on actual the manufacturing, can earlier lining 30 be inserted in (shown in Fig. 5 D) (for example can utilize directly modes such as being inserted in, pushing sintering) in the porous material 40, right Hou is carried out oil impregnate and is handled (shown in Fig. 5 E), utilize porous material 40 can comprise the characteristic of lubricant medium 50, make its inside preserve lubricant medium 50 (shown in Fig. 5 E), certainly, be not defined as and carry out oil impregnate again after being inserted in porous material 40, can utilize the material that can comprise lubricant medium 50 to make yet.
Install an axle center 10 then in lining 30 (step 904), and to its pressurization back sealing (step 905), shown in Fig. 5 F, 5G, certainly, as previously mentioned, the big I of precompressed 60 is by calculating optimum value.Wherein, being one to be connected on the bearing of 10 bottoms, axle center (top) shown in the figure, but being not limited in this, also can be the bearing that is installed in axle center 10 central authorities, and difference is that bearing support 20 two ends all must seal (not shown).
A kind of dynamic and static pressure fluid bearing of the present invention and manufacture method thereof have the following advantages:
1. improve the processing difficulties degree of various endoporus minute grooves in the miniature fluid bearing.
2. the abrasion the when starting of the rigidity stiffness of lubricant medium between retainer shaft and bearing, and minimizing stops.
3. improve the mode of lubricant medium injection bearing groove.
4. solve the problem that the excessive back of lubricant medium replenishes.
Above said content is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; All equalizations of being done according to the present invention change and modify, and all belong to protection scope of the present invention.
Claims (14)
1. a dynamic and static pressure fluid bearing is used to install an axle center, and this FDB includes:
One bearing support, inside includes lubricant medium; And
One lining places this bearing support, has a plurality of dynamic pressure grooves, and this dynamic pressure groove penetrates this lining, thereby makes this lubricant medium be stored in this dynamic pressure groove, and is installed in this lining with rotating form for this axle center.
2. dynamic and static pressure fluid bearing as claimed in claim 1 is characterized in that: this bearing support is inner for having porous material.
3. dynamic and static pressure fluid bearing as claimed in claim 1 is characterized in that: this bearing support includes a sealing unit.
4. dynamic and static pressure fluid bearing as claimed in claim 3 is characterized in that: the sealing unit is a sealer.
5. dynamic and static pressure fluid bearing as claimed in claim 1 is characterized in that: this lining is a tubular lining.
6. dynamic and static pressure fluid bearing as claimed in claim 1 is characterized in that: this dynamic pressure groove is two pairs of lambdoid grooves.
7. the manufacture method of a dynamic and static pressure fluid bearing includes the following step at least:
Form a lining;
Processing produces a plurality of dynamic pressure grooves that penetrate on this lining;
This lining is incorporated into one to have in the bearing support of lubricant medium;
Install an axle center in this lining after, this bearing support is applied a precompressed and being sealed.
8. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7, it is characterized in that: this lining is a tubular lining.
9. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7, it is characterized in that: this dynamic pressure groove is to utilize cutter to be processed to form.
10. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7 is characterized in that: this dynamic pressure groove is to utilize etching mode to form.
11. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7 is characterized in that: this dynamic pressure groove is two pairs of lambdoid grooves.
12. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7 is characterized in that: this bearing support inside is to have porous material.
13. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7 is characterized in that: this lining can utilize the mode of directly being inserted in, and is incorporated in this bearing support.
14. the manufacture method of dynamic and static pressure fluid bearing as claimed in claim 7 is characterized in that: this lining can utilize the mode of extruding sintering, is incorporated in this bearing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011314915A CN1153012C (en) | 2001-09-12 | 2001-09-12 | Dynamic and static pressure fluid bearing and its making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011314915A CN1153012C (en) | 2001-09-12 | 2001-09-12 | Dynamic and static pressure fluid bearing and its making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403723A CN1403723A (en) | 2003-03-19 |
| CN1153012C true CN1153012C (en) | 2004-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011314915A Expired - Fee Related CN1153012C (en) | 2001-09-12 | 2001-09-12 | Dynamic and static pressure fluid bearing and its making process |
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| Country | Link |
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| CN (1) | CN1153012C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989900A (en) * | 2017-12-22 | 2018-05-04 | 上海理工大学 | A kind of dynamic pressure cylinder revolute pair |
| CN107906125A (en) * | 2017-12-22 | 2018-04-13 | 上海理工大学 | A kind of sound compression column body revolute pair |
| CN111965039B (en) * | 2020-08-25 | 2022-06-10 | 贵州大学 | Experimental device for research moves/hydrostatic pressure to rock mechanical properties's influence |
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2001
- 2001-09-12 CN CNB011314915A patent/CN1153012C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1403723A (en) | 2003-03-19 |
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Granted publication date: 20040609 Termination date: 20160912 |