CN113431844A - High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device - Google Patents
High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device Download PDFInfo
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- CN113431844A CN113431844A CN202010209490.1A CN202010209490A CN113431844A CN 113431844 A CN113431844 A CN 113431844A CN 202010209490 A CN202010209490 A CN 202010209490A CN 113431844 A CN113431844 A CN 113431844A
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- gas bearing
- spiral groove
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- 230000003068 static effect Effects 0.000 title abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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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
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention belongs to the technical field of gas bearings, and particularly relates to a high-speed spiral groove small hole throttling dynamic and static pressure gas bearing device. This gas bearing is hollow cylinder, and hollow cylinder lateral wall has double air supply hole along circumference evenly distributed, and every air supply hole all cooperates with the aperture flow controller, the air supply hole corresponds with the aperture flow controller is coaxial. The hollow cylinder inside wall has the axial of rectangle to lead to a groove a little along circumference middle section processing and makes double aperture flow controller intercommunication, and the hollow cylinder inside wall has still opened multiunit helicla flute, and the helicla flute symmetric distribution leads to the groove both sides a little at the axial. The bearing integrates the advantages of static pressure and dynamic pressure gas bearings, external high-pressure gas is firstly conveyed into the small-hole throttler through the gas supply hole during the starting and stopping stages of the bearing, a static pressure effect is formed, the rigidity of a gas film is increased, the stability is improved, external continuous high-pressure gas supply is stopped during high-speed rotation, air is pressed into the spiral groove by utilizing the rotation of the shaft neck to generate a dynamic pressure effect of fluid, the bearing capacity is improved, and the purpose of enhancing the overall performance of the bearing is achieved.
Description
The technical field is as follows:
the invention belongs to the technical field of gas bearings, and particularly relates to a high-speed spiral groove small hole throttling dynamic and static pressure gas bearing device.
Background art:
with the rapid development of various emerging technology industries, the bearing is used as a key part of machinery and limits the development of other technologies, so that more severe conditions are provided for the mechanical part of each industry. The traditional bearing is more and more difficult to meet the high performance requirements of the machine, and the gas bearing is more and more widely applied to modern machines due to the advantages of high precision, small friction energy consumption, long service life, strong adaptability to various environments, cleanness, environmental protection and the like. However, because the working medium is gas, the gas bearing has the problems of insufficient bearing capacity and insufficient anti-interference capacity to vibration caused by small surface rigidity of the gas film. Therefore, the improvement of the bearing capacity and the surface rigidity of the gas film of the gas bearing has profound significance for further application of the gas bearing in the modern mechanical field, so that a dynamic and static gas bearing device with high bearing capacity and high rigidity is needed.
The invention content is as follows:
the invention aims to provide a high-speed spiral groove small hole throttling dynamic and static gas bearing device aiming at the defects of the prior art, which can meet the requirements of improving the bearing capacity of a gas bearing and the surface rigidity of a gas film, thereby achieving the aim of enhancing the overall performance of the gas bearing.
The invention adopts the following technical scheme:
a high-speed spiral groove small hole throttling dynamic and static pressure gas bearing is provided with a gas supply hole, a small hole throttling device, a spiral groove and an axial micro-through groove.
The middle section of the inner side wall of the high-speed spiral groove small hole throttling hybrid gas bearing is provided with a plurality of rectangular axial micro-through grooves, and the two sides of each axial micro-through groove are provided with a plurality of groups of symmetrical spiral grooves along the circumferential direction. The high-speed spiral groove small hole throttling hybrid gas bearing is characterized in that a plurality of groups of double-row gas supply holes are formed in the outer side wall of the high-speed spiral groove small hole throttling hybrid gas bearing along the circumferential direction, a small hole throttling device is arranged at the bottom of each gas supply hole, the double-row gas supply holes are communicated with the axial micro-through groove through the small hole throttling devices, and the gas supply holes correspond to the small hole throttling devices coaxially.
The technical scheme adopted by the invention has the following beneficial effects: the invention integrates the advantages of static pressure and dynamic pressure gas bearings, can meet the requirement that the bearing firstly conveys external high-pressure gas into a small-hole throttleer through a gas supply hole in the starting and stopping stages to form a static pressure effect, achieves the purposes of avoiding dry friction, increasing the surface rigidity of a gas film and improving the stability, and also can meet the requirement that the bearing stops external continuous high-pressure gas supply when rotating at high speed, presses air into a spiral groove by utilizing the rotation of a shaft neck to generate the dynamic pressure effect of fluid, improves the bearing capacity and achieves the purpose of enhancing the overall performance of the bearing.
Description of the drawings:
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2 and a partially enlarged view;
FIG. 4 is a top view of the present invention;
FIG. 5 is a sectional view taken along line B-B of FIG. 4 and a partial enlarged view;
fig. 6 is a cross-sectional view taken along line C-C of fig. 4 and a partially enlarged view.
In the figure: 1 air supply hole; 2 small-hole throttler; 3, spiral groove; 4 axial micro-through grooves.
The specific implementation mode is as follows:
the technical solution in the embodiments of the present invention will be further clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1 to 6, the embodiment discloses a high-speed spiral groove small-hole throttling hybrid gas bearing, which is provided with a gas supply hole, a small-hole throttling device, a spiral groove and an axial micro-through groove. High-speed helicla flute aperture throttle hybrid gas bearing is hollow cylinder, and hollow cylinder lateral wall is opened along circumference has a plurality of air feed holes 1, adopts double air feed hole in this embodiment, and 1 bottom and aperture flow controller 2 intercommunication in every air feed hole. The air supply hole 1 is coaxially corresponding to the small-hole throttler 2. The hollow cylinder inside wall middle section is opened along circumference has the little logical groove 4 of axial of a plurality of rectangles, 2 bottoms of aperture flow controller and the little logical groove 4 intercommunication of axial, the air supply hole 1 and the little logical groove 4 of axial that correspond through 2 intercommunications of aperture flow controller. The inner side wall of the hollow cylinder is also provided with a plurality of spiral grooves 3 along the circumferential direction, and the spiral grooves 3 which are symmetrical in the embodiment are respectively distributed on two sides of the axial micro-through groove 4.
Specifically, the embodiment is described with reference to fig. 3 and 4, the outer diameter of the high-speed spiral groove small hole throttling hybrid gas bearing is D, D is generally 80 to 100mm, the width is L, L is generally 60 to 80mm, and the rest is the same as the first embodiment.
Specifically, the present embodiment will be described with reference to fig. 3, in which the spiral groove 3 has a width bgWidth bgDirectly influencing the static behavior of the bearing, bgGenerally 1 to 3 mm; the spiral angle of the spiral groove 3 is beta, and the angle of the beta is 40-50 degrees; the air supply hole 1 is a double-row air supply hole, and the diameter of the air supply hole 1 is d1，d1Generally taking 2-4 mm; the diameter of the small-hole throttler 2 is d2D for convenient processing and uneasy blockage of small holes during bearing working process2Generally 0.2-0.4 mm; the depth h of the axial micro through groove 4 is 0.16-0.18 mm, the depth h greatly affects the performance of the bearing, the axial micro through groove 4 communicates the small-hole throttler 2 with two rows, and the rest is the same as the first embodiment.
Specifically, referring to fig. 5, in the present embodiment, the width of the axial micro through groove 4 is b, and the bearing capacity and the air film surface rigidity of the bearing tend to increase with the increase of the width b, but when the width b increases to a certain extent, the improvement effect of the bearing capacity and the air film surface rigidity is not obvious, and the width b is generally 0.6 to 0.8 mm. And 8 are evenly distributed along circumference in the axial micro-through groove 4, 8 groups are evenly distributed along circumference in the air supply hole 1 and the small-hole throttler 2, so that the uniformity of high-pressure air supply is ensured, and the others are the same as those in the first embodiment.
Specifically, in the present embodiment, the depth of the spiral groove 3 is h as shown in fig. 6g，hgCan cause the thickness of the gas film to change, thereby affecting the bearing capacity, the bearing capacity increases along with the reduction of the depth hgGenerally 0.1 to 0.3 mm. And 24 groups of spiral grooves 3 are symmetrically distributed along the circumferential direction, and the rest is the same as that of the first embodiment.
Principle of operation
When the high-pressure gas bearing device works, external high-pressure gas is conveyed into the small-hole throttleer through the plurality of gas supply holes, pressure drop is generated through the throttling action of the small-hole throttleer to form static pressure bearing, external high-pressure gas supply is stopped under high-speed operation, and air is pressed into the spiral groove by utilizing the rotation of the shaft neck to form the dynamic pressure effect of fluid, so that the characteristics of the high-pressure gas bearing device are achieved.
Claims (6)
1. The utility model provides a high-speed helicla flute aperture throttle hybrid gas bearing which characterized in that: the hybrid gas bearing is a hollow cylinder, double rows of gas supply holes 1 are uniformly distributed on the outer side wall of the hollow cylinder along the circumferential direction, each gas supply hole 1 is matched with a small-hole throttler 2, and the gas supply holes 1 coaxially correspond to the small-hole throttlers 2. The hollow cylinder inside wall has the axial of rectangle to lead to groove 4 a little along circumference middle section processing and makes the 2 intercommunications of double aperture flow controller, and the hollow cylinder inside wall has still opened multiunit helicla flute 3, and the helicla flute 3 symmetric distribution leads to groove 4 both sides a little in the axial.
2. The high-speed spiral groove small hole throttling hybrid gas bearing as claimed in claim 1, wherein: the spiral grooves 3 are uniformly distributed with 24 groups along the circumferential direction, and the groove depth hg0.1 to 0.3mm, a groove width bg1-3 mm, and the angle of the helical angle beta is 40-50 degrees.
3. The high-speed spiral groove small hole throttling hybrid gas bearing as claimed in claim 1, wherein: the air supply holes 1 are double rows of air supply holes, 8 groups are uniformly distributed along the circumference, the air supply holes 1 are circular holes, and the diameter d of the air supply holes12-4 mm.
4. The high-speed spiral groove small hole throttling hybrid gas bearing as claimed in claim 1, wherein: the outer diameter of the hollow cylinder is D, D is generally 80-100 mm, the width is L, and L is generally 60-80 mm.
5. The high-speed spiral groove small hole throttling hybrid gas bearing as claimed in claim 1, wherein: the orifice throttler 2 is evenly distributed with 8 groups along the circumference, and the diameter d of the orifice20.2-0.4 mm.
6. The high-speed spiral groove small hole throttling hybrid gas bearing as claimed in claim 1, wherein: the axial micro-through grooves 4 are rectangular, 8 grooves are uniformly distributed along the circumference, the groove width b is 0.6-0.8 mm, and the groove depth h is 0.16-0.18 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209490.1A CN113431844A (en) | 2020-03-23 | 2020-03-23 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209490.1A CN113431844A (en) | 2020-03-23 | 2020-03-23 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
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| CN113431844A true CN113431844A (en) | 2021-09-24 |
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| CN202010209490.1A Pending CN113431844A (en) | 2020-03-23 | 2020-03-23 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632338A (en) * | 2005-01-18 | 2005-06-29 | 哈尔滨工业大学 | Mixed type helical groove dynamical and static pressure gas composite cylindrical bearing |
| CN201093013Y (en) * | 2007-10-15 | 2008-07-30 | 中国科学院工程热物理研究所 | Internal groove self-lubricating movable static pressure coupled air bearing |
| CN101413541A (en) * | 2007-10-15 | 2009-04-22 | 中国科学院工程热物理研究所 | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing |
| CN201396194Y (en) * | 2009-05-11 | 2010-02-03 | 马惠秋 | Turbocharger supported by static pressure gas bearing with self-lubricating sliding supercharge flow channel groove |
| CN103343775A (en) * | 2013-07-08 | 2013-10-09 | 上海大学 | Gas bearing integrated by dynamic pressure and static pressure |
| CN206329633U (en) * | 2016-11-03 | 2017-07-14 | 东北林业大学 | A kind of annular groove taper hole dynamical and static pressure gas bearing |
| CN209569266U (en) * | 2019-01-05 | 2019-11-01 | 东北林业大学 | A kind of two-way herringbone groove dynamic and static pressure air-floating main shaft |
| CN110732687A (en) * | 2018-07-20 | 2020-01-31 | 东北林业大学 | micro-groove hole dynamic and static pressure air-float main shaft |
| CN211874947U (en) * | 2020-03-23 | 2020-11-06 | 东北林业大学 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
-
2020
- 2020-03-23 CN CN202010209490.1A patent/CN113431844A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632338A (en) * | 2005-01-18 | 2005-06-29 | 哈尔滨工业大学 | Mixed type helical groove dynamical and static pressure gas composite cylindrical bearing |
| CN201093013Y (en) * | 2007-10-15 | 2008-07-30 | 中国科学院工程热物理研究所 | Internal groove self-lubricating movable static pressure coupled air bearing |
| CN101413541A (en) * | 2007-10-15 | 2009-04-22 | 中国科学院工程热物理研究所 | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing |
| CN201396194Y (en) * | 2009-05-11 | 2010-02-03 | 马惠秋 | Turbocharger supported by static pressure gas bearing with self-lubricating sliding supercharge flow channel groove |
| CN103343775A (en) * | 2013-07-08 | 2013-10-09 | 上海大学 | Gas bearing integrated by dynamic pressure and static pressure |
| CN206329633U (en) * | 2016-11-03 | 2017-07-14 | 东北林业大学 | A kind of annular groove taper hole dynamical and static pressure gas bearing |
| CN110732687A (en) * | 2018-07-20 | 2020-01-31 | 东北林业大学 | micro-groove hole dynamic and static pressure air-float main shaft |
| CN209569266U (en) * | 2019-01-05 | 2019-11-01 | 东北林业大学 | A kind of two-way herringbone groove dynamic and static pressure air-floating main shaft |
| CN211874947U (en) * | 2020-03-23 | 2020-11-06 | 东北林业大学 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
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