CN100364001C - Combined type magnetic suspension hard disk driver - Google Patents
Combined type magnetic suspension hard disk driver Download PDFInfo
- Publication number
- CN100364001C CN100364001C CNB2004100610367A CN200410061036A CN100364001C CN 100364001 C CN100364001 C CN 100364001C CN B2004100610367 A CNB2004100610367 A CN B2004100610367A CN 200410061036 A CN200410061036 A CN 200410061036A CN 100364001 C CN100364001 C CN 100364001C
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- hard disk
- rotating shaft
- bearing
- combined type
- support
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Abstract
The present invention relates to a combined type magnetic suspension hard disk driver which comprises a disk sheet motor, a hard disk sheet (1), a rotating shaft (3), a supporting and a control mechanisms of the rotating shaft (3), and a displacement sensor (18) and an electrostatic prevention mechanism, wherein the displacement sensor (18) detects the space attitude of the hard disk sheet; the electrostatic prevention mechanism is composed of current conducting liquid (12) and a current conducting needle (10); the supporting mechanism is a magnetic bearing which comprises a repulsion force type passive taper radial bearing and a disk sheet bearing, the passive taper radial bearing is composed of a permanent-magnetic clamp (13) and a permanent magnetism cone disk (14), and the disk sheet bearing is composed of an iron core (6) and a coil (7); the upper end, the middle and the lower end head of the rotating shaft are separately and fixedly connected with a tray (4), the permanent magnetism cone disk and the current conducting needle; the lower part of the rotating shaft is embedded and connected with an elastic retainer ring (9); the permanent-magnetic clamp (13), a stator (15) and the disk sheet bearing are arranged on a base (8); a rotor (17) is arranged on a rotating disk (5) which is connected with the shaft body of the rotating shaft. The present invention avoids the problems of heating, abrasion, vibration, noise, etc. of a hard disk mechanical system, and provides a very large space for enhancing rotation speed of a main shaft of a hard disk.
Description
Technical field
The present invention relates to a kind of combined type magnetically floating hard disk drive.
Background technology
Topmost several assemblies comprise CPU, video card, mainboard, internal memory and hard disk in the computer system.Unique to have only hard disk be to rely on mechanical system to carry out reading and writing data, and the speed of mechanical system motion will be much more slowly than Circuits System.Therefore, the read or write speed of hard disk becomes the bottleneck of further raising computer speed.The rotating speed of accelerating main shaft can improve the read or write speed of hard disk, but can cause the problems such as heating, wearing and tearing, vibration and noise of hard disk mechanical system.Magnetically floating hard disk is in suspended state with magnetic force with hard disc, has avoided the problems referred to above, provides great space for hard disk improves the speed of mainshaft.
Summary of the invention
Technical matters to be solved by this invention is: a kind of combined type magnetically floating hard disk drive is provided.Magnetically floating hard disk drive is a principle of work of utilizing magnetic bearing, substitutes the main shaft bearing of original hard disk drive with magnetic bearing, and other the structure and the principle of work thereof of mechanism of hard disk drive all remains unchanged.
Design concept of the present invention is: in rotating shaft 3 in the radial direction, the axis that the repulsion that utilizes the two permanent magnet same sexes to repel each other to be produced makes rotating shaft 3 keeps concentric with the axis of permanent-magnetic clamp 13; On rotating shaft 3 axial directions, the repulsion that utilizes the two permanent magnet same sexes to repel each other to be produced and be subjected to the electromagnetic attraction of Current Control, make stressed the reach balance of rotating shaft 3 on its axis direction, make hard disc be in rotation under the suspended state, avoid the problems such as heating, wearing and tearing, vibration and noise of mechanical system.In order to control the rotation attitude of hard disc, rotation attitude by displacement transducer monitoring hard disc, with the electric current of computer control by each disc bearing coil, regulate the size of the electromagnetic force that each disc bearing produced, guarantee hard disc on request attitude rotation all the time.Simultaneously, when eliminating the hard disc high speed rotating and the measure of the static that produced of windage, avoid magnetically floating hard disk to be subjected to the interference of static, improved the reliability of hard disk work.
The technical scheme that the present invention solves its technical matters is: comprise disk motors, hard disc, rotating shaft and supporting thereof, control gear, being contained in being used on the support measures the displacement transducer of hard disc spatial attitude, and by conductive liquid be immersed in the electrostatic prevention mechanism that conductive pin wherein constitutes vacantly.Supporting device is a magnetic bearing, and it comprises the passive tapering transverse bearing of being made up of permanent-magnetic clamp, permanent magnetism awl dish of repulsion type, and by being contained in the iron core on the support and being wound in the disc bearing that the coil of iron core outside is formed.The upper end of rotating shaft, middle part, lower end are connected with pallet, permanent magnetism awl dish, conductive pin respectively, and bottom and circlip embedding connect; Permanent-magnetic clamp, stator and disc bearing are contained on the support, and rotor is contained on the rotating disk, and the axis body of rotating disk and rotating shaft is connected.
The present invention compared with prior art, magnetically floating hard disk substitutes the main shaft bearing of original hard disk drive with magnetic bearing, with magnetic force hard disc is suspended in the space fully, avoided the problems such as heating, wearing and tearing, vibration and noise of hard disk mechanical system, provide great space for hard disk improves the speed of mainshaft.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the position view when circlip 9 touches base 8 among Fig. 1, and this figure has removed hard disc 1, platen 2 and pallet 4 parts.
Fig. 3 is the planimetric position synoptic diagram of iron core among Fig. 1 (6), coil (7) and displacement transducer (18).
Fig. 4 is the A-A cut-open view of Fig. 3, and circlip 9 is in suspended state among the figure.This figure has removed hard disc 1, platen 2 and pallet 4 parts.
Embodiment
The present invention is a kind of combined type magnetically floating hard disk drive, its structure is as shown in Figure 1 and Figure 2: comprise disk motors, hard disc 1, rotating shaft 3 and supporting thereof, control gear, measure the displacement transducer 18 of hard disc 1 spatial attitude, and by conductive liquid 12 be immersed in the electrostatic prevention mechanism that conductive pin 10 wherein constitutes vacantly.Supporting device is a magnetic bearing, and it comprises the passive tapering transverse bearing of being made up of permanent-magnetic clamp 13, permanent magnetism awl dish 14 of repulsion type, and the disc bearing of being made up of iron core 6, coil 7.The upper end of rotating shaft 3, middle part, lower end are connected with pallet 4, permanent magnetism awl dish 14, conductive pin 10 respectively, and bottom and circlip 9 embeddings connect.Permanent-magnetic clamp 13, stator 15 and disc bearing are contained on the support 8, and rotor 17 is contained on the rotating disk 5, and rotating disk 5 is connected with the axis body of rotating shaft 3.
As shown in Figure 3: the disc bearing has 4, evenly distributes along the circumferencial direction of support 8, in twos at a distance of 90 °.They are in order to the rotation attitude of constraint hard disc 1, that is: around 2 rotational freedoms of x, y coordinate axis, along 1 one-movement-freedom-degree of z coordinate direction.On the x-y plane, two disc bearings on the x axis are realized the Differential Control of hard disc 1 together, and two disc bearings on the y axis are realized the Differential Control of hard disc 1 together; And retrain 1 one-movement-freedom-degree along the z coordinate direction with permanent magnetic part.
Sketch the course of work of the present invention below in conjunction with accompanying drawing.
When off working state was hard disc 1 off-duty, rotating shaft 3 was not rotated, and at this moment, rotating shaft 3 moves up under the repulsion effect that permanent-magnetic clamp 13 and permanent magnetism awl dish 14 are produced, until circlip 9 (see figure 2) that contacts with support 8 bottoms.
In the time of in working order, rotating shaft 3 moves down under the effect of the electromagnetic force that the disc bearing is produced, the size of electromagnetic force is by determining by the electric current in the coil 7, under the control of control system, electromagnetic force and repulsion balance each other, make circlip 9 be suspended in support 8 below (see figure 4)s, disk motors drives rotating shaft 3 and drives hard disc 1 rotation simultaneously.
Have when disk motors under the situation of electric current, produce rotating magnetic field between motor stator 15 and the rotor 17, rotating disk 5 and rotating shaft 3 are rotated under the driving of rotating magnetic field, so hard disc 1 is in the magnetic levitation duty.Simultaneously, displacement transducer 18 is measured the spatial attitude of rotating disk 5, by the control system of forming by A/D, DSP, D/A and power amplifier (referring to ZL02115474.0 " antistatic technique of magnetically floating hard disk drive "), the Control current of output panel sheet bearing, electric current produces electromagnetic force in the disc bearing, make hard disc 1 be in desirable suspended state at any time.
When hard disc 1 high speed rotating, the static that itself and windage are produced discharges by the static release channel that rotating shaft 3, conductive pin 10, conductive liquid 12 and conductive liquid box 11 constitute, thus the reliability that can avoid damaging hard disk or reduce the disk read-write data.Rotating shaft 3, conductive pin 10 and electric liquid box 11 are by the favorable conductive made, and conductive liquid adds the material with electric conductivity by lubricating oil and forms (referring to ZL02115474.0 " antistatic technique of magnetically floating hard disk drive ").
Other mechanism of the hard disk drive that does not relate in the present embodiment, all same prior art of its structure and principle of work.
Claims (6)
1. combined type magnetically floating hard disk drive, comprise disk motors, hard disc (1), rotating shaft (3) and supporting thereof, control gear, being contained in being used on the support (8) measures the displacement transducer (18) of hard disc (1) spatial attitude, and by conductive liquid (12) be immersed in the electrostatic prevention mechanism that conductive pin (10) wherein constitutes vacantly, it is characterized in that: supporting device is a magnetic bearing, it comprises by permanent-magnetic clamp (13), the passive tapering transverse bearing of repulsion type that permanent magnetism awl dish (14) is formed, and by being contained in the iron core (6) on the support (8) and being wound in the disc bearing that the outside coil (7) of iron core (6) is formed; The upper end of rotating shaft (3), middle part, lower end are connected with pallet (4), permanent magnetism awl dish (14), conductive pin (10) respectively, and bottom and circlip (9) embedding connects; Permanent-magnetic clamp (13), stator (15) and disc bearing are contained on the support (8), and rotor (17) is contained on the rotating disk (5), and rotating disk (5) is connected with the axis body of rotating shaft (3).
2. combined type magnetically floating hard disk drive according to claim 1 is characterized in that the disc bearing has 4, evenly distributes along the circumferencial direction of support (8), in twos at a distance of 90 °.
3. combined type magnetically floating hard disk drive according to claim 1 is characterized in that displacement transducer (18) has 3, and they distribute along the circumferencial direction of support (8), and not point-blank.
4. combined type magnetically floating hard disk drive according to claim 1 is characterized in that being provided with magnetism shielding hood (16) between stator (15) and support (8).
5. combined type magnetically floating hard disk drive according to claim 1 is characterized in that hard disc (1) is fixed on the pallet (4) by platen (2).
6. combined type magnetically floating hard disk drive according to claim 1 is characterized in that conductive liquid (12) is loaded in the conductive liquid box (11), and the shell of conductive liquid box (11) links to each other with the bottom of support (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100610367A CN100364001C (en) | 2004-11-02 | 2004-11-02 | Combined type magnetic suspension hard disk driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100610367A CN100364001C (en) | 2004-11-02 | 2004-11-02 | Combined type magnetic suspension hard disk driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1606084A CN1606084A (en) | 2005-04-13 |
| CN100364001C true CN100364001C (en) | 2008-01-23 |
Family
ID=34764402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100610367A Expired - Fee Related CN100364001C (en) | 2004-11-02 | 2004-11-02 | Combined type magnetic suspension hard disk driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100364001C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112712827B (en) * | 2020-12-22 | 2021-12-10 | 杭州职业技术学院 | Magnetic suspension flywheel energy storage type mechanical hard disk with low acceleration time |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020089245A1 (en) * | 2000-12-23 | 2002-07-11 | Shixin Chen | Electric spindle motor with magnetic bearing and hydrodynamic bearing |
| CN1368727A (en) * | 2002-01-28 | 2002-09-11 | 武汉理工大学 | Antistatic technique for magnetically floating hard disk drive |
| CN1375825A (en) * | 2002-01-28 | 2002-10-23 | 武汉理工大学 | Mangetically suspended fixed disk drive based on force control |
| US20030117031A1 (en) * | 2001-12-24 | 2003-06-26 | Industrial Technology Research Institute | Magnetic bearing |
-
2004
- 2004-11-02 CN CNB2004100610367A patent/CN100364001C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020089245A1 (en) * | 2000-12-23 | 2002-07-11 | Shixin Chen | Electric spindle motor with magnetic bearing and hydrodynamic bearing |
| US20030117031A1 (en) * | 2001-12-24 | 2003-06-26 | Industrial Technology Research Institute | Magnetic bearing |
| CN1368727A (en) * | 2002-01-28 | 2002-09-11 | 武汉理工大学 | Antistatic technique for magnetically floating hard disk drive |
| CN1375825A (en) * | 2002-01-28 | 2002-10-23 | 武汉理工大学 | Mangetically suspended fixed disk drive based on force control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1606084A (en) | 2005-04-13 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20091202 |