CN1632330A - Magnetic suspension and dynamical pressure air-floating composite bearing - Google Patents
Magnetic suspension and dynamical pressure air-floating composite bearing Download PDFInfo
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- CN1632330A CN1632330A CN 200510009627 CN200510009627A CN1632330A CN 1632330 A CN1632330 A CN 1632330A CN 200510009627 CN200510009627 CN 200510009627 CN 200510009627 A CN200510009627 A CN 200510009627A CN 1632330 A CN1632330 A CN 1632330A
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Abstract
Magnetic suspension and dynamical pressure air-floating composite bearing is provided. The magnetic suspension magnetic pole surface disposes a dynamical pressure groove. The magnetic suspension magnetic pole constitutes part or whole dynamical pressure air-floating working face. The invention eliminates the dry friction state in the start and stop process. The bearing is no wear, low startup torque and maintains inherent advantages of the dynamical pressure air-floating bearing, largely reduces the requirement and cost of the dynamical pressure air-floating bearing surface treatment. Regulation of the ''center point drift rate'' Psi based on the different requirement enables the system to have different output characteristic so as to make the dynamical pressure air-floating bearing apply for medium and large equipments.
Description
Technical field
The present invention relates to bearing, especially ultraprecise, the ultra high speed bearing of a kind of magnetic suspension, dynamic pressure air float compound action.
Background technique
The kinetic pressure air-float bearing of inner that uses in the present engineering, as: the kinetic pressure air-float bearing of inner in gyro dynamic pressure motor bearing, high-speed electric expreess locomotive kinetic pressure air-float bearing of inner, the high-speed boosting pump etc., there is dry condition in the start-up course, could form the dynamic pressure air film when bearing rotating speed reaches certain value, enter the stabilizing gas lubricating status; Simultaneously, also there is dry condition in stopped process, the dynamic pressure air film disappeared when the bearing rotating speed was reduced to certain value, bearing enters dry condition, effect lower bearing rotating speed in dry friction drops to zero, (Chemical Industry Press. the 7th piece-gas bearing .2002 of " mechanical design handbook " second volume the 4th edition; China Machine Press. the 40 piece of chapter 9 in " mechanical design handbook " Volume Four-gas bearing .2003 second edition).This bearing dry condition makes the bearing working surface abrasion serious, and operating life reduces, even makes starting torque exceed motor rotation blockage moment, and motor can't start.Therefore must adopt the fabulous special material of friction resistant performance, thereby cost height, life-span are low, popularize difficulty.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the above-mentioned technology, a kind of bearing that does not have dry condition is provided.
For achieving the above object, the technical solution used in the present invention is to constitute part or all of dynamic pressure air float working surface with maglev magnetic pole.
Advantage of the present invention
(1) there is not dry condition in start-up course, and steady-working state has the advantage of kinetic pressure air-float bearing of inner and magnetic suspension bearing simultaneously, and bearing load carrying capacity doubles, and rigidity doubles, and reliability doubles.
(2) steady-working state can have all advantages (low-frictional force, low power consumption, highi degree of accuracy etc.) of kinetic pressure air-float bearing of inner, starts and stopped process employing magnetic suspension mode of operation, reduces or eliminate the dry condition of bearing.Also can allow two kinds of operating modes work simultaneously, with rigidity, increase bearing capacity, increase damping, the enhancing antijamming capability that increases bearing.
Description of drawings
Accompanying drawing 1 is the plane and the combination bearing schematic representation that has the inner cylindrical surface of dynamic pressure groove that has the dynamic pressure groove;
Accompanying drawing 2 is the inner cylindrical surface bearing schematic representation that have the dynamic pressure groove;
Accompanying drawing 3 is the planes and the combination bearing schematic representation that has the external cylindrical surface of dynamic pressure groove that have the dynamic pressure groove;
Accompanying drawing 4 is the bearing with cylindrical outside surface schematic representation that have the dynamic pressure groove;
Accompanying drawing 5 is the conical bearing schematic representation that have the dynamic pressure groove;
Accompanying drawing 6 is the spherical bearing schematic representation that have the dynamic pressure groove;
Accompanying drawing 7 is that schematic representation is launched in the interrupted cylndrical surface that has the dynamic pressure groove;
Accompanying drawing 8 is the interrupted floor map that have the dynamic pressure groove;
Accompanying drawing 9 is stepped fan type surfaces.
Accompanying drawing 10 is that the continuous cylinder face that has a dynamic pressure groove launches is intention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
By Fig. 1-Fig. 9 as can be known, the present invention is that magnetic suspension magnetic pole 1 surface has dynamic pressure groove 2, and maglev magnetic pole 1 constitutes the part or all of of dynamic pressure air float working surface 3.
Described working surface 3 is the planes that have the dynamic pressure groove.
Described working surface 3 is inner cylindrical surface or the external cylindrical surfaces that have the dynamic pressure groove.
Described working surface 3 is the conical surfaces that have the dynamic pressure groove.
Described working surface 3 is the spheres that have the dynamic pressure groove.
Described working surface 3 is the interrupted surfaces that have the dynamic pressure groove.
Described working surface 3 is the continuous levels that have the dynamic pressure groove, and nonferromagnetic medium 6 is filled in the gap between magnetic pole.
Described working surface 3 is stepped fan type surfaces.
Embodiment 1:
As shown in Figure 1, a kind of setting type of bearing of rotor, working surface 3 adopts inner cylindrical surface and the two kinds of forms in plane, on rotor shaft 4, be furnished with step, be used for increasing the diameter of axle, strengthen the radial bearing bearing capacity, arranging for magnetic pole 1 simultaneously provides the space, and cod magnetic pole 1 adopts four utmost points or one pole, and the radial bearing magnetic pole adopts the ends of the earth;
Embodiment 2:
As shown in Figure 3, a kind of bearing setting type of rotor, working surface 3 adopts external cylindrical surface and the two kinds of forms in plane, be that mandrel 5 is stators, the cod magnetic pole adopts four utmost points or one pole, and the radial bearing magnetic pole adopts the ends of the earth, and mandrel 5 is fixed into one with radial bearing magnetic pole 1, cod magnetic pole 1;
Embodiment 3:
As shown in Figure 5, a kind of conical bearing form, working surface 3 adopts conical, and conical bearing magnetic pole 1 adopts the ends of the earth;
Embodiment 4:
As shown in Figure 6, a kind of spherical bearing form, working surface 3 adopts spherical, and spherical bearing magnetic pole 1 adopts the ends of the earth;
Embodiment 5:
As shown in Figure 7, a kind of cod, working surface 3 adopts interrupted plane, and magnetic pole 1 adopts 4 utmost points, and groove 2 has only an end to communicate with the external world;
Embodiment 6:
As shown in Figure 8, a kind of radial bearing working surface 3 launches schematic representation, and working surface 3 adopts interrupted cylndrical surface, and groove 2 has only an end to communicate with the external world;
Embodiment 7:
As shown in figure 10, a kind of radial bearing working surface 3 launches schematic representation, and working surface 3 adopts the continuous cylinder face, adopts the nonferromagnetic material to fill between the magnetic pole 1;
Embodiment 8:
As shown in Figure 9, a kind of cod working surface 3 schematic representation, working surface 3 adopts stepped fan type surface.
Basic principle of the present invention is: magnetic suspension principle, dynamic pressure air float principle are compound in a bearing simultaneously, and magnetic suspension can be adopted the active type magnetic suspension principle, also can adopt the passive magnetic suspension principle; Dynamic pressure air float can be the radial dynamic pressure air-bearing, also can be thrust bearing, can also be the taper kinetic pressure air-float bearing of inner, or the sphere kinetic pressure air-float bearing of inner; Structurally, maglev magnetic pole constitutes the part (or all) of dynamic pressure air float working surface, technological scheme is that maglev magnetic pole constitutes that working surface that has the dynamic pressure groove in the dynamic pressure air float working surface, can eliminate the influence of the dynamic pressure groove of dynamic pressure air float in the rotation process to magnetic line of force distribution in the magnetic suspension like this; According to mentioned above principle, can constitute multiple bearing, as: active type magnetic suspension dynamic pressure air float radial bearing, active type magnetic suspension dynamic pressure air float thrust bearing, active type magnetic suspension dynamic pressure air float conical bearing, active type magnetic suspension dynamic pressure air float spherical bearing, passive magnetic suspension dynamic pressure air float radial bearing, passive magnetic suspension dynamic pressure air float thrust bearing, passive magnetic suspension dynamic pressure air float conical bearing, passive magnetic suspension dynamic pressure air float spherical bearing etc.Bearing of the present invention can have three kinds of operating modes: magnetic suspension operating mode, dynamic pressure air float operating mode, associating operating mode, also can adopt the part operating mode.Under the situation of divided working status operation, the operating mode order is: magnetic suspension operating mode (startup operating mode), dynamic pressure air float operating mode (steady state operating condition), magnetic suspension operating mode (stopping operating mode), in the operating mode handoff procedure, exist part to unite the situation of operating mode, but only be transient process, dry condition is eliminated fully in this case; Magnetic suspension and dynamic pressure air float are worked simultaneously, claim the associating operating mode, under this operating mode, the total bearing capacity of bearing is the summation of magnetic suspension and dynamic pressure air float bearing capacity, when magnetic suspension bearing capacity during less than the total design bearing capacity of bearing, the dry condition time has obtained shortening, frictional force reduces, but dry condition is not eliminated fully.Surface treatment, bearing working surface can be adopted methods such as nitrogenize, chromium plating, anodic oxidation, spray aluminum oxide, chromium oxide, tungsten carbide tool, sputter titanium nitride, molybdenum disulfide.When adopting methods such as casting, assembling to fill with nonferromagnetic material when gap between magnetic pole, the trench design method is identical with traditional kinetic pressure air-float bearing of inner design method; When gap between magnetic pole did not adopt Nonferromugnetic material to fill, the trench design method was identical with traditional kinetic pressure air-float bearing of inner design method, and just interrupted place, surface adopts blind flute profile formula between magnetic pole, and as Fig. 7, blind groove and end distance L approximate average pitch of grooves; The trench design method of radial bearing, conical bearing is consistent with mentioned above principle.
The working surface of dynamic pressure air float can be the plane that has the dynamic pressure groove, also can be stepped scalloped surface, bearing axial pushing force; The working surface of dynamic pressure air float can be the cylndrical surface that has the dynamic pressure groove, bears radial load; Can also be conical surface or the sphere that has the dynamic pressure groove, bear radial and axial load simultaneously; The dynamic pressure air float working surface can be interrupted, and promptly working surface is discontinuous between the magnetic pole; Also can adopt continuous working surface, at this moment adopt the nonferromagnetic medium to fill between the magnetic pole, guarantee can not cause short circuit between the magnetic pole.
Claims (8)
1. magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: the magnetic suspension pole surface has the dynamic pressure groove, maglev magnetic pole constitute the dynamic pressure air float working surface partly or entirely.
2. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is the plane that has the dynamic pressure groove.
3. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is inner cylindrical surface or the external cylindrical surface that has the dynamic pressure groove.
4. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is the conical surface that has the dynamic pressure groove.
5. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is the sphere that has the dynamic pressure groove.
6. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is the interrupted surface that has the dynamic pressure groove.
7. as claim 1 described magnetic suspension and dynamical pressure air-floating composite bearing, it is characterized in that: described working surface is the continuous level that has the dynamic pressure groove, and the nonferromagnetic medium is filled in the gap between magnetic pole.
8. as claim 2 described magnetic suspension and dynamical pressure air-floating composite bearings, it is characterized in that: described working surface is stepped fan type surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510009627 CN1632330A (en) | 2005-01-18 | 2005-01-18 | Magnetic suspension and dynamical pressure air-floating composite bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510009627 CN1632330A (en) | 2005-01-18 | 2005-01-18 | Magnetic suspension and dynamical pressure air-floating composite bearing |
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| CN1632330A true CN1632330A (en) | 2005-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510009627 Pending CN1632330A (en) | 2005-01-18 | 2005-01-18 | Magnetic suspension and dynamical pressure air-floating composite bearing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101910657B (en) * | 2007-10-23 | 2013-10-23 | 韩国科学技术研究院 | Airfoil-magnetic hybrid bearing and control system thereof |
| CN106369055A (en) * | 2016-11-21 | 2017-02-01 | 杭州电子科技大学 | Pneumatic bidirectional output shaft based on magnetic-air hybrid spherical bearing |
| CN106763192A (en) * | 2017-03-31 | 2017-05-31 | 河北工业大学 | Radial and axial power can be born and with the floating-ring bearing of automatic reverse oil supply function |
-
2005
- 2005-01-18 CN CN 200510009627 patent/CN1632330A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101910657B (en) * | 2007-10-23 | 2013-10-23 | 韩国科学技术研究院 | Airfoil-magnetic hybrid bearing and control system thereof |
| CN106369055A (en) * | 2016-11-21 | 2017-02-01 | 杭州电子科技大学 | Pneumatic bidirectional output shaft based on magnetic-air hybrid spherical bearing |
| CN106369055B (en) * | 2016-11-21 | 2018-05-29 | 杭州电子科技大学 | A kind of pneumatic output shafts based on magnetism mixing spherical bearing |
| CN106763192A (en) * | 2017-03-31 | 2017-05-31 | 河北工业大学 | Radial and axial power can be born and with the floating-ring bearing of automatic reverse oil supply function |
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Owner name: HARBIN INSTITUTE OF TECHNOLOGY Free format text: FORMER OWNER: HARBIN INSTITUTE OF TECHNOLOGY; YAO SHAOMING Effective date: 20060929 |
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Effective date of registration: 20060929 Address after: 150001 No. 92 West straight street, Harbin, Heilongjiang Applicant after: Harbin Institute of Technology Address before: 150001 No. 92 West straight street, Harbin, Heilongjiang Applicant before: Harbin Institute of Technology Co-applicant before: Yao Shaoming |
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