CN102305237A - Fluid dynamic pressure bearing and fluid dynamic pressure shaft - Google Patents
Fluid dynamic pressure bearing and fluid dynamic pressure shaft Download PDFInfo
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- CN102305237A CN102305237A CN201110250519A CN201110250519A CN102305237A CN 102305237 A CN102305237 A CN 102305237A CN 201110250519 A CN201110250519 A CN 201110250519A CN 201110250519 A CN201110250519 A CN 201110250519A CN 102305237 A CN102305237 A CN 102305237A
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Abstract
The invention discloses a fluid dynamic pressure bearing and a fluid dynamic pressure shaft. The fluid dynamic pressure shaft is arranged in a hollow chamber of the fluid dynamic pressure bearing. Dynamic pressure grooves are provided on the inner side wall of the fluid dynamic pressure bearing hollow chamber or on the outer side of the fluid dynamic pressure shaft. The dynamic pressure grooves comprise plurality sets of flowing channels distributed with spaces. Each set of flowing channels comprises a first flowing channel, a second flowing channel and a guiding flowing channel. The first flowing channel and the second flowing channel form a V-structured intersection. The guiding flowing channel is positioned on the intersection of the first flowing channel and the second flowing channel. Guiding flowing channels in neighboring flowing channel sets are not communicated. Therefore, the configuring of the guiding flowing channels assists in maintaining the dynamic balance of lubricating fluid and improving the rotation precision of the fluid dynamic pressure shaft. With the technical scheme of the invention, the fluid dynamic pressure bearing and the fluid dynamic pressure shaft are provided with better wear resistances and prolonged service lives. Also, a phenomenon of lubricating fluid leakage is effectively prevented.
Description
Technical field
The present invention relates to the hydrodynamic pressure bearing art, refer in particular to high hydrodynamic pressure bearing of a kind of long service life and rotation precision and hydrodynamic rotating shaft.
Background technique
In the past for example in the hard disc motor normally used bearing be ball bearing; Yet; Because the abrasion condition of ball every ball when rolling is different; The flutter phenomenon that the meeting appearance can not be expected after use a period of time; These flutter phenomenon cause the read/write head derailing, if the excessive normal read-write of just can't carrying out of deviation has been operated.
Afterwards; Hydrodynamic pressure bearing has appearred; It is through in the dynamic pressure groove, filling the dynamically lubricating fluid; In the bearing play, produce the dynamic pressure effect of lubricating fluid; Thereby with non-contact mode support fluid dynamic pressure rotating shaft, it is adapted to high speed rotating, and has advantages such as high running accuracy, low noise and high working life; Thereby, substituted aforementioned ball bearing gradually.
To above-mentioned hydrodynamic pressure bearing, as described in the patent No. 200620101987.7, the two runners system in its every group of runner is obliquely installed into the splayed shape structure, and it is difficult to form the higher pressure point of building; And for example the patent No. is the dynamic pressure groove of 02292854.5 record; Its every group of runner roughly becomes the V-shape structure; Two runners are set up higher pressure with support fluid dynamic pressure rotating shaft in joint; But; The dynamic pressure groove of this kind structure; When the lubricating fluid pressure of two runners in every group of runner does not wait; The lubricating fluid of the runner that pressure is bigger is prone to reverse the inflow in the less runner of lubricating fluid pressure; Be difficult to the original intersection's build-up pressure that is designed; Thereby, be unfavorable for the dynamical balance feature of lubricating fluid, influenced the rotation precision of hydrodynamic rotating shaft; And, also be prone to the lubricating fluid leakage phenomenon; And the patent No. 200410051160.5 and the patent No. 200680000504.7 described dynamic pressure grooves, it has played good leakproofness, and still, its all dynamic pressure groove communicates with each other, and is unfavorable for forming the stable higher pressure point of building.
By this, be badly in need of technological scheme that research makes new advances to solve above-mentioned deficiency.
Summary of the invention
In view of this; The present invention is directed to the disappearance of prior art existence; Its main purpose provides a kind of hydrodynamic pressure bearing and hydrodynamic rotating shaft; It has improved the rotation precision of hydrodynamic rotating shaft; Prolonged the working life of hydrodynamic pressure bearing and hydrodynamic rotating shaft; Simultaneously, effectively prevented the lubricating fluid leakage phenomenon.
For realizing above-mentioned purpose, the present invention adopts following technological scheme:
A kind of hydrodynamic pressure bearing; Its inside has the cavity that supplies hydrodynamic rotating shaft installing; Offer a plurality of dynamic pressure grooves that are used for the filling lubricating fluid on this cavity interior sidewall surface; This dynamic pressure groove includes the many groups runner that is provided with at interval; Every group of runner includes first flow, second runner and correcting runner, and this first flow crosses into V font structure with second runner, and this correcting runner is communicated in the intersection of the first flow and second runner; And the correcting runner in the two adjacent groups runner is not communicated with.
As a kind of preferred version, said correcting runner only is positioned at V font inside configuration or the outside that aforementioned first flow and second runner cross and form; Perhaps, aforementioned correcting runner one end is positioned at the V font inside configuration that first flow and second runner cross and form, and its other end is positioned at the cross V font structural outer of formation of first flow and second runner.
As a kind of preferred version, the said first flow and second runner are symplex structure with respect to aforementioned correcting runner.
As a kind of preferred version, said dynamic pressure groove is positioned near the aforementioned cavity end positions.
As a kind of preferred version, said many group runners along the circumferential direction distribute.
A kind of hydrodynamic rotating shaft; It is to be installed in the inner cavity of hydrodynamic pressure bearing; Offer a plurality of dynamic pressure grooves that are used for the filling lubricating fluid on this hydrodynamic rotating shaft outer side surface; This dynamic pressure groove includes the many groups runner that is provided with at interval; Every group of runner includes first flow, second runner and correcting runner; This first flow crosses into V font structure with second runner; This correcting runner is communicated in the intersection of the first flow and second runner; And the correcting runner in the two adjacent groups runner is not communicated with.
As a kind of preferred version, said correcting runner only is positioned at V font inside configuration or the outside that aforementioned first flow and second runner cross and form; Perhaps, aforementioned correcting runner one end is positioned at the V font inside configuration that first flow and second runner cross and form, and its other end is positioned at the cross V font structural outer of formation of first flow and second runner.
As a kind of preferred version, the said first flow and second runner are symplex structure with respect to aforementioned correcting runner.
As a kind of preferred version, said dynamic pressure groove is positioned near the aforementioned cavity end positions.
As a kind of preferred version, said dynamic pressure groove along the circumferential direction distributes.
After the present invention adopts technique scheme; Its beneficial effect is; Main system is through the setting of correcting runner; Help keeping the transient equiliblium of lubricating fluid; Improve the rotation precision of hydrodynamic rotating shaft, made hydrodynamic pressure bearing and hydrodynamic rotating shaft have the better wear resistance ability, prolonged both working life; Simultaneously, effectively prevented the lubricating fluid leakage phenomenon.
For more clearly setting forth structure characteristic of the present invention and effect, come the present invention is elaborated below in conjunction with accompanying drawing and specific embodiment.
Description of drawings
Fig. 1 is the perspective view of hydrodynamic pressure bearing among first kind of embodiment of the present invention;
Fig. 2 is the stereo dissected figure of hydrodynamic pressure bearing among first kind of embodiment of the present invention;
Fig. 3 is the schematic cross-section of hydrodynamic pressure bearing among first kind of embodiment of the present invention;
Fig. 4 is the assembling schematic representation of hydrodynamic pressure bearing (the dynamic pressure groove is arranged) and hydrodynamic rotating shaft (no dynamic pressure groove) among first kind of embodiment of the present invention;
Fig. 5 is the flow schematic diagram of lubricating fluid in the dynamic pressure groove among first kind of embodiment of the present invention;
Fig. 6 is the assembling schematic representation of hydrodynamic pressure bearing (no dynamic pressure groove) and hydrodynamic rotating shaft (the dynamic pressure groove is arranged) among first kind of embodiment of the present invention;
Fig. 7 is the decomposing schematic representation of hydrodynamic pressure bearing (the dynamic pressure groove is arranged) and hydrodynamic rotating shaft (the dynamic pressure groove is arranged) among first kind of embodiment of the present invention;
Fig. 8 is the stereo dissected figure when being concaved with annular groove on the hydrodynamic pressure bearing cavity medium position inwall among first kind of embodiment of the present invention;
Fig. 9 is the schematic cross-section when being concaved with annular groove on the hydrodynamic pressure bearing cavity medium position inwall among first kind of embodiment of the present invention;
Figure 10 is the perspective view of hydrodynamic pressure bearing among second kind of embodiment of the present invention;
Figure 11 is the stereo dissected figure of hydrodynamic pressure bearing among second kind of embodiment of the present invention;
Figure 12 is the schematic cross-section of hydrodynamic pressure bearing among second kind of embodiment of the present invention;
Figure 13 is the flow schematic diagram of lubricating fluid in the dynamic pressure groove among second kind of embodiment of the present invention;
Figure 14 is the schematic cross-section of hydrodynamic pressure bearing among the third embodiment of the present invention;
Figure 15 is the flow schematic diagram of lubricating fluid in the dynamic pressure groove among the third embodiment of the present invention.
The accompanying drawing identifier declaration:
10, hydrodynamic rotating shaft 101, annular groove
102, flute mark 11, dynamic pressure groove
111, first flow 112, second runner
113, correcting runner 113 ', the correcting runner
113 〞, correcting runner 20, hydrodynamic pressure bearing
21, dynamic pressure groove.
Embodiment
See also Fig. 1 to shown in Figure 9, it has shown first kind of embodiment's of the present invention concrete structure.
At first, see also shown in Figure 4ly, hydrodynamic pressure bearing 10 inside have a cavity, and this hydrodynamic rotating shaft 20 is installed in this cavity.We can be through only offering dynamic pressure groove 11 (as shown in Figure 4) on the cavity interior sidewall surface of hydrodynamic pressure bearing 10; Also can only on hydrodynamic rotating shaft 20 outer surfaces, offer dynamic pressure groove 21 (as shown in Figure 6); Perhaps; Respectively at offering dynamic pressure groove 11 on the cavity interior sidewall surface of hydrodynamic pressure bearing 10 and on hydrodynamic rotating shaft 20 outer surfaces; 21 (as shown in Figure 7); This dynamic pressure groove 11; Be filled with the dynamically lubricating fluid in 21; Utilize lubricating fluid between hydrodynamic rotating shaft 20 and hydrodynamic pressure bearing 10, to produce lubrication; With the collision and the friction of 10 of hydrodynamic pressure bearings, and hydrodynamic rotating shaft 20 is maintained within certain rotation precision when avoiding hydrodynamic rotating shaft 20 to rotate by the pressure and the damping characteristic of lubricating fluid foundation.
The present invention focuses on, the structural design of aforementioned dynamic pressure groove, and at this, the dynamic pressure groove of offering on the cavity interior sidewall surface with hydrodynamic pressure bearing 10 11 is that example explains.
To shown in Figure 5, this dynamic pressure groove 11 is positioned near the aforementioned cavity end positions like Fig. 2, thereby sets up dynamic pressure in the cavity of hydrodynamic pressure bearing 10 respectively near end positions.This dynamic pressure groove 11 includes the many groups runner that is provided with at interval; Should along the circumferential direction distribute by many group runners; Every group of runner includes first flow 111, second runner 112 and the correcting runner 113 that communicates with each other, and the outlet end of the outlet end of this first flow 111 and second runner 112 is intersected in the entry end of correcting runner 113.In present embodiment, the aforementioned first flow 111 and second runner 112 cross into V font structure, and aforementioned correcting runner 113 is positioned at this V font inside configuration, and aforementioned first flow 111 and second runner 112 are symplex structure with respect to aforementioned correcting runner 113.Lubricating fluid is respectively via first flow 111, second runner 112 and correcting runner 113; And in three's the big pressure of position foundation that crosses; With the rotation of support fluid dynamic pressure rotating shaft 20, the sense of rotation of this hydrodynamic rotating shaft 20 and the flow direction of aforementioned lubricating fluid are in circumferentially identical.
Need to prove to have aforementioned dynamic pressure groove 21 with spline structure when only being opened in aforesaid fluid dynamic pressure rotating shaft 20 outer surfaces (as shown in Figure 6), the sense of rotation of this hydrodynamic rotating shaft 20 and the flow direction of aforementioned lubricating fluid are in circumferentially opposite.Certainly; Respectively at the sense of rotation of the flow direction that offers lubricating fluids in this dynamic pressure groove 11 of 11,21 o'clock (as shown in Figure 7) of dynamic pressure groove on the cavity interior sidewall surface of hydrodynamic pressure bearing 10 and on hydrodynamic rotating shaft 20 outer surfaces and hydrodynamic rotating shaft 20 in circumferentially identical, and in this dynamic pressure groove 21 sense of rotation of the flow direction of lubricating fluids and hydrodynamic rotating shaft 20 in circumferential opposite.
In addition; Like Fig. 8 and shown in Figure 9; When being concaved with annular groove 101 on the aforementioned hydrodynamic pressure bearing 10 cavity medium position inwalls; The degree of depth of aforementioned dynamic pressure groove 11 obviously is shallower than the degree of depth of annular groove 101; Thereby; When making dynamic pressure groove 11, can on annular groove 101 interior sidewall surface of hydrodynamic pressure bearing 10 cavity medium positions, not form like Fig. 8 and flute mark 102 shown in Figure 9.
Then; See also Figure 10 to shown in Figure 13, it has shown second kind of embodiment's of the present invention concrete structure, compares with aforementioned first kind of embodiment; The difference of present embodiment is, the V font structural outer that this correcting runner 113 ' the be positioned at first flow 111 and second runner 112 cross.
Like Figure 14 and shown in Figure 15; It has shown the third embodiment's of the present invention concrete structure; Compare with aforementioned two kinds of embodiments; The difference of present embodiment is; This correcting runner 113 〞 one end is positioned at the V font inside configuration that first flow 111 and 112 of second runners cross and form, and its other end is positioned at the cross V font structural outer of formation of first flow 111 and 112 of second runners.
Design focal point of the present invention is; Main system is through the setting of correcting runner; Help keeping the transient equiliblium of lubricating fluid; Improved the rotation precision of hydrodynamic rotating shaft; Make hydrodynamic pressure bearing and hydrodynamic rotating shaft have the better wear resistance ability; Prolong both working life, simultaneously, effectively prevented the lubricating fluid leakage phenomenon.
The above; It only is preferred embodiment of the present invention; Be not that technical scope of the present invention is imposed any restrictions, so every foundation technical spirit of the present invention all still belongs in the scope of technological scheme of the present invention any trickle modification, equivalent variations and modification that above embodiment did.
Claims (10)
1. hydrodynamic pressure bearing; Its inside has the cavity that supplies hydrodynamic rotating shaft installing; Offer a plurality of dynamic pressure grooves that are used for the filling lubricating fluid on this cavity interior sidewall surface; It is characterized in that: this dynamic pressure groove includes the many groups runner that is provided with at interval; Every group of runner includes first flow, second runner and correcting runner; This first flow crosses into V font structure with second runner; This correcting runner is communicated in the intersection of the first flow and second runner; And the correcting runner in the two adjacent groups runner is not communicated with.
2. hydrodynamic pressure bearing according to claim 1 is characterized in that: said correcting runner only is positioned at V font inside configuration or the outside that aforementioned first flow and second runner cross and form; Perhaps, aforementioned correcting runner one end is positioned at the V font inside configuration that first flow and second runner cross and form, and its other end is positioned at the cross V font structural outer of formation of first flow and second runner.
3. hydrodynamic pressure bearing according to claim 1 is characterized in that: the said first flow and second runner are symplex structure with respect to aforementioned correcting runner.
4. hydrodynamic pressure bearing according to claim 1 is characterized in that: said dynamic pressure groove is positioned near the aforementioned cavity end positions.
5. hydrodynamic pressure bearing according to claim 1 is characterized in that: said many group runners along the circumferential direction distribute.
6. hydrodynamic rotating shaft; It is to be installed in the inner cavity of hydrodynamic pressure bearing; Offer a plurality of dynamic pressure grooves that are used for the filling lubricating fluid on this hydrodynamic rotating shaft outer side surface; It is characterized in that: this dynamic pressure groove includes the many groups runner that is provided with at interval; Every group of runner includes first flow, second runner and correcting runner; This first flow crosses into V font structure with second runner; This correcting runner is communicated in the intersection of the first flow and second runner; And the correcting runner in the two adjacent groups runner is not communicated with.
7. hydrodynamic rotating shaft according to claim 6 is characterized in that: said correcting runner only is positioned at V font inside configuration or the outside that aforementioned first flow and second runner cross and form; Perhaps, aforementioned correcting runner one end is positioned at the V font inside configuration that first flow and second runner cross and form, and its other end is positioned at the cross V font structural outer of formation of first flow and second runner.
8. hydrodynamic rotating shaft according to claim 6 is characterized in that: the said first flow and second runner are symplex structure with respect to aforementioned correcting runner.
9. hydrodynamic pressure bearing according to claim 6 is characterized in that: said dynamic pressure groove is positioned near the aforementioned cavity end positions.
10. hydrodynamic pressure bearing according to claim 6 is characterized in that: said dynamic pressure groove along the circumferential direction distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110250519A CN102305237A (en) | 2011-08-29 | 2011-08-29 | Fluid dynamic pressure bearing and fluid dynamic pressure shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110250519A CN102305237A (en) | 2011-08-29 | 2011-08-29 | Fluid dynamic pressure bearing and fluid dynamic pressure shaft |
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| CN102305237A true CN102305237A (en) | 2012-01-04 |
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| CN201110250519A Pending CN102305237A (en) | 2011-08-29 | 2011-08-29 | Fluid dynamic pressure bearing and fluid dynamic pressure shaft |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795590A (en) * | 2017-11-21 | 2018-03-13 | 珠海格力电器股份有限公司 | Bearing cooling structure, motor and centrifugal compressor |
| CN109404416A (en) * | 2018-12-14 | 2019-03-01 | 中国船舶重工集团公司第七0七研究所 | A kind of hydrodynamic pressure bearing and its manufacturing method |
| CN107795590B (en) * | 2017-11-21 | 2024-06-04 | 珠海格力电器股份有限公司 | Bearing cooling structure, motor and centrifugal compressor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5871285A (en) * | 1996-02-08 | 1999-02-16 | Aesop, Inc. | Hybrid combined hydrostatic and hydrodynamic bearing with enhanced stability and reduced flow rate |
| CN2589703Y (en) * | 2002-12-31 | 2003-12-03 | 财团法人工业技术研究院 | Hydrodynamic fluid bearing module |
| US20060192451A1 (en) * | 2005-01-28 | 2006-08-31 | Chu-Wan Hong | Fluid dynamic bearing |
| CN1920317A (en) * | 2005-08-26 | 2007-02-28 | 台达电子工业股份有限公司 | Method for manufacturing dynamic pressure bearing |
| CN2898417Y (en) * | 2006-03-23 | 2007-05-09 | 范垚银 | Oily fluid dynamical bearing |
| CN101571158A (en) * | 2008-05-04 | 2009-11-04 | 财团法人工业技术研究院 | Multilevel dynamic pressure groove and dynamic pressure bearing having same |
| JP2010060034A (en) * | 2008-09-03 | 2010-03-18 | Ntn Corp | Hydrodynamic pressure bearing device |
| CN202348955U (en) * | 2011-08-29 | 2012-07-25 | 姚文雪 | Fluid hydrodynamic bearing and fluid hydrodynamic rotation shaft |
-
2011
- 2011-08-29 CN CN201110250519A patent/CN102305237A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5871285A (en) * | 1996-02-08 | 1999-02-16 | Aesop, Inc. | Hybrid combined hydrostatic and hydrodynamic bearing with enhanced stability and reduced flow rate |
| CN2589703Y (en) * | 2002-12-31 | 2003-12-03 | 财团法人工业技术研究院 | Hydrodynamic fluid bearing module |
| US20060192451A1 (en) * | 2005-01-28 | 2006-08-31 | Chu-Wan Hong | Fluid dynamic bearing |
| CN1920317A (en) * | 2005-08-26 | 2007-02-28 | 台达电子工业股份有限公司 | Method for manufacturing dynamic pressure bearing |
| CN2898417Y (en) * | 2006-03-23 | 2007-05-09 | 范垚银 | Oily fluid dynamical bearing |
| CN101571158A (en) * | 2008-05-04 | 2009-11-04 | 财团法人工业技术研究院 | Multilevel dynamic pressure groove and dynamic pressure bearing having same |
| JP2010060034A (en) * | 2008-09-03 | 2010-03-18 | Ntn Corp | Hydrodynamic pressure bearing device |
| CN202348955U (en) * | 2011-08-29 | 2012-07-25 | 姚文雪 | Fluid hydrodynamic bearing and fluid hydrodynamic rotation shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795590A (en) * | 2017-11-21 | 2018-03-13 | 珠海格力电器股份有限公司 | Bearing cooling structure, motor and centrifugal compressor |
| CN107795590B (en) * | 2017-11-21 | 2024-06-04 | 珠海格力电器股份有限公司 | Bearing cooling structure, motor and centrifugal compressor |
| CN109404416A (en) * | 2018-12-14 | 2019-03-01 | 中国船舶重工集团公司第七0七研究所 | A kind of hydrodynamic pressure bearing and its manufacturing method |
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Application publication date: 20120104 |