CN106640971B - A kind of pressurized air thrust bearing - Google Patents
A kind of pressurized air thrust bearing Download PDFInfo
- Publication number
- CN106640971B CN106640971B CN201710137519.8A CN201710137519A CN106640971B CN 106640971 B CN106640971 B CN 106640971B CN 201710137519 A CN201710137519 A CN 201710137519A CN 106640971 B CN106640971 B CN 106640971B
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- China
- Prior art keywords
- micro
- bearing
- throttle orifice
- pressurized air
- thrust bearing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
- F16C32/0622—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via nozzles, restrictors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
- F16C32/0692—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for axial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The present invention provides a kind of pressurized air thrust bearings.The pressurized air thrust bearing uses the throttle orifice with micro-structure chamber, and a certain number of micro-structure slots are processed on bearing working face, to make air-flow experience repeatedly expansion during through throttle orifice and air film gap, enhance the throttle effect in throttle orifice and air film gap by the thermodynamic losses repeatedly expanded, to achieve the purpose that improve rigidity.The advantages that present invention has structure simple, and processing cost is low, process stabilizing, quality controllable, rigidity is higher than traditional orifice restriction pressurized air thrust bearing, and manufacturing cost is close with traditional orifice restriction pressurized air thrust bearing.
Description
Technical field
The invention belongs to hydrostatic gas-lubricated bearings, and in particular to a kind of pressurized air thrust bearing.
Background technique
Orifice restriction pressurized air thrust bearing due to high-precision advantage on precision machine tool and precision measurement equipment
There is irreplaceable important application.Bearing rigidity is the main performance index of orifice restriction pressurized air thrust bearing, and really
Protect the key of bearing accuracy and precision stability.Orifice restriction pressurized air thrust bearing generally uses the throttle orifice of smaller aperture due
With lesser air film gap, make gas that stronger throttle effect occur during intermembrane space gentle by throttle orifice, to have
Conducive to the raising of bearing rigidity.Common orifice restriction pressurized air thrust bearing, throttle diameter between 0.1 ~ 0.4mm,
And air film gap is between 10 ~ 100 μm.Although throttle effect can be enhanced in the aperture and air film gap that further decrease throttle orifice
And further increase bearing rigidity, but to obtain and add less than the throttle orifice of 0.1mm diameter or the air film gap less than 10 μm
It is very big that work manufactures upper difficulty, while also bringing higher processing and manufacturing cost.
Summary of the invention
In order to overcome, the processing and manufacturing difficulty of pressurized air thrust bearing in the prior art is big, processing and manufacturing is at high cost not
Foot, the present invention propose a kind of pressurized air thrust bearing.
Technical scheme is as follows:
A kind of pressurized air thrust bearing of the invention, its main feature is that, the pressurized air thrust bearing includes diameter
Identical thrust button and bearing, connection relationship are that thrust button is located at the top of bearing, and thrust button is concentric set with bearing
It sets.The identical throttle orifice of several structures is evenly arranged with along throttling pore size distribution circle on the bearing；The throttle orifice is one
Through-hole is provided with several micro-structure chambers in through-holes.The aperture of throttle orifice upper end is located on bearing working face, throttle orifice lower end with
The air vent connection of bearing bottom surface is set.Micro-structure slot I, the micro-structure slot of annular concentric are respectively arranged in bearing working face
Ⅱ.Micro-structure slot I and micro-structure slot II are located at throttling pore size distribution circle two sides.
The diameter of the micro-structure chamber is greater than the orifice diameter of throttle orifice.
The cross sectional shape of micro-structure chamber in the throttle orifice is one of rectangle, semi-circular, triangle.
The cross sectional shape of the micro-structure slot is one of rectangle, up-side down triangle, inverted trapezoidal, semi-circular.
The quantitative range of the throttle orifice is six to ten.
The quantitative range of the micro-structure slot I, micro-structure slot II is two to three ten.
Micro-structure chamber in throttle orifice of the invention changes the diameter of throttle orifice constantly in airflow direction, undergoes gas
It repeatedly expands and then enhances throttle effect.Micro-structure slot on working face, changes air film clearance height constantly in airflow direction,
It expands gas experience repeatedly and then enhances throttle effect.
Working face in the present invention can be set to the working face of the slot containing micro-structure, or be not provided with micro-structure slot
Complete plane.
Throttle orifice in the present invention can be set to the throttle orifice of the chamber containing micro-structure, or be not provided with micro-structure chamber
Throttle orifice.
The present invention enhances the throttle effect of the gentle intermembrane space of throttle orifice using having the micro-structure for determining shape, thus real
The raising of existing orifice restriction pressurized air thrust bearing rigidity.New construction bearing evades reduction throttling while improving rigidity
Aperture and air film gap bring manufacturing technology are difficult.
The invention has the advantages that the rigidity of bearing of the present invention and carrying are high.Structure of the invention is simple, processing cost
Low, process stabilizing is quality controllable.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the partial structural diagram in the present invention；Wherein, Fig. 2 (a) is bearing top view, and Fig. 2 (b) is bearing
Main view, I-I are the enlarged drawing of the throttle orifice in Fig. 2 (b), and II-II is the micro-structure slot enlarged drawing in Fig. 2 (b)；
Fig. 3 is the throttle orifice cross-sectional view in the present invention；
Fig. 4 is the cross-sectional view of the micro-structure slot in the present invention；
In figure, 1. thrust button, 2. air film gap, 3. bearing, 4. outer boundary, 5. inner boundary, 6. bearing working face
7. throttle pore size distribution circle 8. micro-structure slot, I 9. aperture, 10. micro-structure chamber, 11. throttle orifice, 12. air vent 13.
Micro-structure slot II.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
Embodiment 1
Fig. 1 is bearing overall structure diagram of the invention；Fig. 2 is the partial structural diagram in the present invention；Wherein, scheme
2 (a) be bearing top view, and Fig. 2 (b) is the main view of bearing, and I-I is the enlarged drawing of the throttle orifice in Fig. 2 (b), and II-II is figure
Micro-structure slot enlarged drawing in 2 (b)；Fig. 3 is the throttle orifice cross-sectional view in the present invention；Fig. 4 is the micro-structure slot in the present invention
Cross-sectional view.
In Fig. 1 ~ Fig. 4, pressurized air thrust bearing of the invention, including the identical thrust button 1 of diameter and bearing 3,
Connection relationship is that thrust button 1 is located at the top of bearing 3, and thrust button 1 and bearing 3 are concentric setting, as shown in Figure 1.Described
The identical throttle orifice 11 of several structures is evenly arranged with along throttling pore size distribution circle 7 on bearing 3.The throttle orifice 11 is one logical
Hole is provided with several micro-structure chambers 10 in through-holes.The aperture 9 of 11 upper end of throttle orifice is located on bearing working face 6, throttle orifice 11
Lower end is connected to the air vent 12 that 3 bottom surface of bearing is arranged in；The micro-structure slot of annular concentric is respectively arranged in bearing working face 6
I 8, micro-structure slot II 13.Micro-structure slot I 8 and micro-structure slot II 13 are located at 7 two sides of throttling pore size distribution circle.As shown in Figure 2.
The diameter of the micro-structure chamber 10 is greater than 9 diameter of aperture of throttle orifice 11.
The cross sectional shape of micro-structure chamber 10 in the throttle orifice 11 is rectangle 14, in semicircle 15, triangle 16
It is a kind of.As shown in Figure 3.
The cross sectional shape of the micro-structure slot be rectangle 17, up-side down triangle 19, inverted trapezoidal 18, semicircle 20 in one
Kind.As shown in Figure 4.
The quantitative range of the throttle orifice 11 is six to ten.
The quantitative range of the micro-structure slot I 8, micro-structure slot II 13 is two to three ten.
In the present embodiment, the quantitative range of throttle orifice is set as six, and throttle orifice 11 is one of them, 10 shape of micro-structure chamber
Shape is rectangle 14.
Micro-structure slot I 8, micro-structure slot II 13 quantity be two, cross sectional shape is rectangle 17.
In Fig. 1, the gap between thrust button 1 and bearing 3 of the invention is the air film gap, the gas in air film gap
Body has certain pressure to form bearing capacity, and bearing capacity changes with air film gap and changes and form bearing rigidity.Institute of the present invention
Its main function of the micro-structure stated is by enhancing throttle effect, to achieve the purpose that improve rigidity.
In Fig. 2, the micro-structure chamber 10 in throttle orifice 11 changes the aperture of throttle orifice constantly in airflow direction, passes through gas
It goes through and repeatedly expands and then enhance throttle effect.The micro-structure slot I 8 being arranged on bearing working face 6, be located at working face outer boundary 4 with
Throttling pore size distribution is justified between 7, micro-structure slot II 13 is located at working face inner boundary 5 between throttling pore size distribution circle 7, makes air film gap
Height constantly change in airflow direction, make gas experience repeatedly expand so that enhance throttle effect.
The working principle of the invention, which is pressed gas, enters throttle orifice 11 through air vent 12, in throttle orifice 11 with micro-structure
The interaction of chamber 10 makes the repeatedly expansion of gas experience.Then, gas enters air film gap 2 by aperture 9, and gas is between air film later
Inside border circle 4 is flowed with 5 directions of outer boundary circle in gap, in the process gas and the micro-structure slot phase on bearing working face 6
Interaction makes gas undergo multiple expansion again.
Embodiment 2
The present embodiment is identical as the structure of embodiment 1, except that the quantitative range of throttle orifice is set in the present embodiment
Ten are set to, micro-structure chamber shape is semicircle 15.Micro-structure slot I 8, micro-structure slot II 13 quantity be 20, cut
Face shape is inverted trapezoidal 18.
Embodiment 3:
The present embodiment is identical as the structure of embodiment 1, except that the quantitative range of throttle orifice is set in the present embodiment
Ten are set to, micro-structure chamber shape is triangle 16.Bearing working face is the complete plane without micro-structure slot.
Embodiment 4:
The present embodiment is identical as the structure of embodiment 1, except that throttle orifice is without micro-structure in the present embodiment
The throttle orifice of chamber.Micro-structure slot I 8, micro-structure slot II 13 quantity be ten, cross sectional shape is up-side down triangle 19.
Claims (6)
1. a kind of pressurized air thrust bearing, it is characterised in that: the pressurized air thrust bearing includes that diameter is identical only
Push-plate (1) and bearing (3), connection relationship are that thrust button (1) is located at the top of bearing (3), and thrust button (1) is with bearing (3)
Concentric setting；The identical throttle orifice of several structures is evenly arranged with along throttling pore size distribution circle (7) on the bearing (3)
(11)；The throttle orifice (11) is a through-hole, is provided with several micro-structure chambers (10) in through-holes；Throttle orifice (11) upper end
Aperture (9) is located on bearing working face (6), and air vent (12) of throttle orifice (11) lower end with setting in bearing (3) bottom surface is connected to；
Micro-structure slot I (8), the micro-structure slot II (13) of annular concentric are respectively arranged in bearing working face (6)；Micro-structure slot I (8) with
Micro-structure slot II (13) is located at throttling pore size distribution circle (7) two sides, between micro-structure slot I (8) and micro-structure slot II (13) mutually solely
It is vertical.
2. pressurized air thrust bearing according to claim 1, it is characterised in that: the diameter of the micro-structure chamber (10)
Greater than aperture (9) diameter of throttle orifice (11).
3. pressurized air thrust bearing according to claim 1, it is characterised in that: micro- knot in the throttle orifice (11)
The cross sectional shape of structure chamber (10) is rectangle (14), semicircle (15), one of triangle (16).
4. pressurized air thrust bearing according to claim 1, it is characterised in that: the cross sectional shape of the micro-structure slot
For one of rectangle (17), inverted trapezoidal (18), up-side down triangle (19), semicircle (20).
5. pressurized air thrust bearing according to claim 1, it is characterised in that: the quantity model of the throttle orifice (11)
Enclose is six to ten.
6. pressurized air thrust bearing according to claim 1, it is characterised in that: the micro-structure slot I (8), micro- knot
The quantitative range of flute II (13) is two to three ten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137519.8A CN106640971B (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137519.8A CN106640971B (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106640971A CN106640971A (en) | 2017-05-10 |
| CN106640971B true CN106640971B (en) | 2019-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710137519.8A Active CN106640971B (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
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| CN (1) | CN106640971B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269702A (en) * | 2017-07-20 | 2017-10-20 | 中国工程物理研究院机械制造工艺研究所 | A kind of pressurized air journal bearing |
| CN113090659B (en) * | 2021-03-04 | 2022-03-29 | 湖南大学 | Bionic active static pressure gas bearing |
| CN114321179A (en) * | 2021-12-27 | 2022-04-12 | 西北农林科技大学 | Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002066854A (en) * | 2000-08-29 | 2002-03-05 | Ntn Corp | Static pressure gas bearing spindle |
| CN101042159A (en) * | 2007-04-27 | 2007-09-26 | 清华大学 | Air bearing |
| GB2467168B (en) * | 2009-01-26 | 2011-03-16 | Air Bearings Ltd | Gas bearing and method of manufacturing the same |
| JP4992986B2 (en) * | 2010-01-22 | 2012-08-08 | 新東工業株式会社 | Hydrostatic bearing device and stage with hydrostatic bearing device |
| BRPI1105471A2 (en) * | 2011-11-16 | 2015-11-10 | Whirlpool Sa | restrictor and production process of a flow restrictor for aerostatic bearings |
| CN105179480B (en) * | 2015-09-09 | 2017-10-03 | 华中科技大学 | A kind of gas suspension device of active control orifice inlet port air pressure |
| CN106321634A (en) * | 2016-11-18 | 2017-01-11 | 广州市昊志机电股份有限公司 | Composite air flotation shafting structure |
| CN206592433U (en) * | 2017-03-09 | 2017-10-27 | 中国工程物理研究院机械制造工艺研究所 | A kind of pressurized air thrust bearing |
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| CN106640971A (en) | 2017-05-10 |
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