CN103195808B - Pantograph structure molded line kinetic pressure air-float bearing of inner and method for designing - Google Patents
Pantograph structure molded line kinetic pressure air-float bearing of inner and method for designing Download PDFInfo
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- CN103195808B CN103195808B CN201310140166.9A CN201310140166A CN103195808B CN 103195808 B CN103195808 B CN 103195808B CN 201310140166 A CN201310140166 A CN 201310140166A CN 103195808 B CN103195808 B CN 103195808B
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Abstract
The present invention relates to a kind of pantograph structure molded line kinetic pressure air-float bearing of inner and manufacture method.Gas lubrication technique functions comes from the middle of the 19th century, gas bearing, as high speed, low-power consumption, high-accuracy supporting technology, is widely used in the rotating machineries such as gyroscope instrument, electronic computer memory, high-speed machine tool, centrifuge, compressor, blower fan and pump.The composition of the present invention includes: bearing body (1), and described bearing body inner surface has hydrodynamic configuration, and described hydrodynamic configuration is scaling shape line supercharging flow path groove, and this product is pantograph structure molded line kinetic pressure air-float bearing of inner.The present invention is used for supporting high-speed rotating machine.
Description
Technical field:
The present invention relates to a kind of pantograph structure molded line kinetic pressure air-float bearing of inner and manufacture method.
Background technology:
Gas lubrication technique functions comes from the middle of the 19th century, gas bearing, as high speed, low-power consumption, high-accuracy supporting technology, is widely used in the rotating machineries such as gyroscope instrument, electronic computer memory, high-speed machine tool, centrifuge, compressor, blower fan and pump.Under the environment such as some superhigh temperature, ultralow temperature and intense radiation, gas bearing have unlubricated dose, pollution-free, the movement-less part of bearing own, unique advantage such as contactless motion.
Aero dynamic bearing is generation pressure field in viscous gas convergence wedge shape between two relative motion surface, forms air film power supporting rotor high speed rotating, i.e. dynamic pressure effect.Its essence producing bearing capacity be fluid in order to keep the conservation of mass, the conservation of momentum and preservation of energy, for when the thickness of air film does not waits in two relative motion surface: thickness along the direction of motion reduce time, the malleation that can have more than ambient pressure in gap produces；Thickness along the direction of motion increase time, in gap produce negative pressure.Therefore, the molded line quality of bearing inner surface directly affects the thickness of air film, and then affects the bearing capacity of bearing.
On the other hand, aero dynamic bearing is not the direction along bearing capacity due to the attribute of self structure, i.e. gas film pressure with joint efforts, and a part of component is whirling motion power, makes bearing unstability easily occur, affects antiwhip.
Therefore, the key technology of hydrodynamic bearing i.e. bearing Profile Design.On the one hand the hydrodynamic bearing molded line of appropriate design can increase the useful part bearing capacity of air film distribution, improves the bearing capacity of bearing；On the other hand can reduce nonuseable part whirling motion power, i.e. add the stability of rotating machinery.
In conventional hydrodynamic bearing patent, such as: the kinetic pressure air-float bearing of inner of flow passage self-lubricating structure, application number: 200720177829.4, see Fig. 1.Using the simple rectangular inner groove road of tradition, the molded line of conduit can not play the optimum effect of dynamic pressure, thus carrying can be caused not enough and the problem of aerodynamic instability.
Summary of the invention:
Special parameter in it is an object of the invention to provide a kind of pantograph structure molded line kinetic pressure air-float bearing of inner and manufacturing.
Above-mentioned purpose is realized by following technical scheme:
A kind of pantograph structure molded line kinetic pressure air-float bearing of inner, its composition includes: bearing body, and described bearing body inner surface has hydrodynamic configuration, and described hydrodynamic configuration is scaling shape line supercharging flow path groove.
Described pantograph structure molded line kinetic pressure air-float bearing of inner, described scaling shape line supercharging flow path groove is Rafael nozzle molded line supercharging flow path groove or fish head molded line supercharging flow path groove.
The manufacture method of a kind of pantograph structure molded line kinetic pressure air-float bearing of inner, is characterized in that: the method comprises the steps:
(1) bearing body select bearing application temperature T < 500 DEG C, working media be the air under ambient pressure, selection there is the carbon graphite alloy of greasy property of sending from wear-resisting, high temperature resistant as air-bearing body material；
(2) dead load that air-bearing is undertaken be 3 ~ 5 kilograms, working rotor rotating speed be 100000rpm ~ 150000rpm, inner surface offers the structure of pantograph structure type supercharging flow path groove；
(3) pneumatic bearing body pipe office hydrodynamic seal ring is undertaken load character, the requirement of stability, using elastic rubber ring is damping technology measure, it is ensured that hydrodynamic bearing sealing ring structure, intensity and kinetic stability；
(4) technological requirement that the processing of pneumatic bearing designs with the structure manufactured according to hydrodynamic seal ring, it is possible to the numerical control device or the special equipment that meet required precision carry out manufacturing, process and assembling.
Beneficial effect:
Pantograph structure molded line air supporting hydrodynamic bearing the most of the present invention is the air-bearing of a kind of new structure form.The architectural feature of this kinetic pressure air-float bearing of inner is to offer pantograph structure (Rafael nozzle molded line and fish head molded line) supercharging flow path groove structure at bearing inner surface；Bearing body uses wear-resisting, the high temperature resistant and material of self-lubricating property, the structure design that the damping technology measure such as blend rubber circle, metal-rubber and elastic composite is carried out.This hydrodynamic bearing uses the inner surface molded line of appropriate design, on the one hand increases the active constituent of gas film pressure distribution, improves the bearing capacity of bearing；On the other hand reduce harmful i.e. whirling motion power of component, add the stability of rotating machinery.Therefore, it is high that this pure kinetic pressure air-float bearing of inner has bearing capacity, stable, reliability is high, has widened the scope of air-bearing product engineering application further.
The present invention bearing inner surface molded line by appropriate design, changes bearing pressure distribution: gas enters in groove, is radially differently formed gas film pressure because of air-film thickness from structure；Vertically because the pantograph structure of groove forms different pressure distribution.Both direction is respectively formed effective bearing capacity, it is possible to increase the Stability and dependability of air-bearing carrying, has widened the scope of air-bearing application further.
The present invention proposes the aero dynamic bearing of a kind of new structure form, it may be assumed that pantograph structure molded line air-bearing, and principal mode includes Rafael nozzle molded line and fish head molded line.By the bearing inner surface molded line of appropriate design, from structure, change bearing pressure distribution: gas enters in groove, is radially differently formed gas film pressure because of air-film thickness；Vertically because the pantograph structure of groove forms different pressure distribution.Both direction is respectively formed effective bearing capacity, it is possible to increase the Stability and dependability of air-bearing carrying, has widened the scope of air-bearing application further.
Accompanying drawing illustrates:
Accompanying drawing 1 is the kinetic pressure air-float bearing of inner structural representation of flow passage self-lubricating structure.
Accompanying drawing 2 is the expansion schematic diagram scaling the bearing body that shape line supercharging flow path groove is fish head molded line.
Accompanying drawing 3 is the expansion schematic diagram scaling the bearing body that shape line supercharging flow path groove is Rafael nozzle molded line.
Detailed description of the invention:
Embodiment 1:
A kind of pantograph structure molded line kinetic pressure air-float bearing of inner, its composition includes: bearing body 1, and described bearing body inner surface has hydrodynamic configuration, and described hydrodynamic configuration is scaling shape line supercharging flow path groove.
Embodiment 2:
According to the pantograph structure molded line kinetic pressure air-float bearing of inner described in embodiment 1, described scaling shape line supercharging flow path groove is that Rafael nozzle molded line supercharging flow path groove or fish head molded line supercharging flow path groove grooved line are by different angles, regulation air film pressure distribution radially and axially: when grooved line and axial angle are bigger, radially air film power is bigger；When angle is less, axial air film power is bigger.
The distribution of fish head bulbous bow profile groove width is asymmetric, first reduces and increases afterwards, reduces different from the slope increased；Rafael nozzle bulbous bow profile groove width is symmetric, and first reduces and increases afterwards.According to the feature of formation air film power, it is respectively applied in long bearing and short bearing.
Embodiment 3:
A kind of manufacture method of pantograph structure molded line kinetic pressure air-float bearing of inner, the method includes following parameter:
(1) selection of air-bearing body material, i.e. according to the condition such as temperature, pressure and working medium of air-bearing application, rationally selects the performance materials of wear-resisting, high temperature resistant and self-lubricating as air-bearing body material；
(2) the hydrodynamic structure design of air-bearing, i.e. according to the condition such as temperature, pressure and working medium of air-bearing application, and axle journal rotates, whirling motion rotating speed with undertake load character, rationally determine pantograph structure molded line shape；
(3) the body construction design of air-bearing, the conditions such as load character, the requirement of stability and the working medium i.e. undertaken according to air-bearing, use the measures such as rubber ring, metal-rubber and elastic composite, complete the design of hydrodynamic bearing sealing ring structure, intensity and kinetic stability；
(4) processing of air-bearing and manufacture, i.e. according to the technological requirement of air-bearing structure design, the equipment being selected to meet required precision carries out manufacturing, process and assembling.
Embodiment 4:
According to the method for designing of the pantograph structure molded line kinetic pressure air-float bearing of inner described in embodiment 3, specifically include following steps:
(1) selection of bearing body: according to bearing application temperature T < 500 DEG C, working media be the air under ambient pressure, select there is the carbon graphite alloy of greasy property of sending from wear-resisting, high temperature resistant as air-bearing body material；
(2) the hydrodynamic configuration design of the structure of gas-static, pneumatic bearing: the dead load undertaken according to air-bearing is 3 ~ 5 kilograms, working rotor rotating speed is 100000rpm ~ 150000rpm, inner surface offers the structure design of pantograph structure type supercharging flow path groove；
(3) the structure design of pneumatic bearing body: the load character that undertaken according to hydrodynamic seal ring, the requirement of stability, using elastic rubber ring is damping technology measure, completes the design of hydrodynamic bearing sealing ring structure, intensity and kinetic stability；
(4) processing of pneumatic bearing and manufacture: the technological requirement designed according to the structure of hydrodynamic seal ring, is selected to meet the numerical control device of required precision or special equipment carries out manufacturing, process and assembling.
Claims (1)
1. a pantograph structure molded line kinetic pressure air-float bearing of inner, its composition includes: bearing body, it is characterized in that: the inner surface of described bearing body has hydrodynamic configuration, and described hydrodynamic configuration is scaling molded line supercharging flow path groove；
Described scaling molded line supercharging flow path groove is Rafael nozzle molded line supercharging flow path groove or fish head molded line supercharging flow path groove；
Gas enters in groove, is radially differently formed gas film pressure because of air-film thickness；Vertically because the pantograph structure of groove forms different pressure distribution；Both direction is respectively formed effective bearing capacity, it is possible to increase the Stability and dependability of air-bearing carrying；
Grooved line, by different angles, regulates air film pressure distribution radially and axially: when grooved line and axial angle are bigger, radially air film power is bigger；When angle is less, axial air film power is bigger；
The groove width distribution of fish head molded line supercharging flow path groove is asymmetric, first reduces and increases afterwards, reduces different from the slope increased；The groove width of Rafael nozzle molded line supercharging flow path groove is symmetric, and first reduces and increases afterwards；
Described pantograph structure molded line kinetic pressure air-float bearing of inner is manufactured by following steps:
(1) bearing body according to bearing application temperature T < 500 DEG C, working media be the air under ambient pressure, select the carbon graphite alloy with wear-resisting, high temperature resistant and self-lubricating property as air-bearing body material；
(2) dead load that air-bearing is undertaken be 3 ~ 5 kilograms, working rotor rotating speed be 100000rpm ~ 150000rpm, inner surface offers the structure of scaling molded line supercharging flow path groove；
(3) air-bearing body is undertaken according to hydrodynamic seal ring load character, the requirement of stability, using elastic rubber ring is damping technology measure, it is ensured that hydrodynamic bearing sealing ring structure, intensity and kinetic stability；
(4) technological requirement that the processing of air-bearing designs with the structure manufactured according to hydrodynamic seal ring, it is possible to the numerical control device meeting required precision carries out manufacturing, process and assembling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140166.9A CN103195808B (en) | 2013-04-22 | 2013-04-22 | Pantograph structure molded line kinetic pressure air-float bearing of inner and method for designing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310140166.9A CN103195808B (en) | 2013-04-22 | 2013-04-22 | Pantograph structure molded line kinetic pressure air-float bearing of inner and method for designing |
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| CN103195808A CN103195808A (en) | 2013-07-10 |
| CN103195808B true CN103195808B (en) | 2016-08-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108253012A (en) * | 2017-12-13 | 2018-07-06 | 湖南大学 | A kind of method for improving air foil bearing supporting rotor system stability |
| CN110195744B (en) * | 2019-05-27 | 2024-05-03 | 中国航天空气动力技术研究院 | Air bearing structure with rapid heat dissipation function |
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|---|---|---|---|---|
| US4120544A (en) * | 1976-06-03 | 1978-10-17 | Skf Kugellagerfabriken Gmbh | Self-pressurizing radial friction bearing |
| CN1651787A (en) * | 2005-02-17 | 2005-08-10 | 哈尔滨工业大学 | Composite throttling static pressure gas cylinder bearing |
| CN1719051A (en) * | 2005-02-17 | 2006-01-11 | 哈尔滨工业大学 | No swirling flow dynamic pressure air thrust bearing |
| CN201106631Y (en) * | 2007-10-15 | 2008-08-27 | 中国科学院工程热物理研究所 | Dynamical pressure air bearing of interval channel self-lubricating structure |
| 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 |
| CN203176168U (en) * | 2013-04-22 | 2013-09-04 | 哈尔滨耦合动力工程技术中心有限公司 | Scaling structure type linear dynamic pressure gas bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007061454A1 (en) * | 2007-12-20 | 2009-06-25 | Minebea Co., Ltd. | Method for optimizing a bearing groove structure on a bearing surface of a fluid dynamic bearing for improving the bearing properties and corresponding bearing groove structures |
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2013
- 2013-04-22 CN CN201310140166.9A patent/CN103195808B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4120544A (en) * | 1976-06-03 | 1978-10-17 | Skf Kugellagerfabriken Gmbh | Self-pressurizing radial friction bearing |
| CN1651787A (en) * | 2005-02-17 | 2005-08-10 | 哈尔滨工业大学 | Composite throttling static pressure gas cylinder bearing |
| CN1719051A (en) * | 2005-02-17 | 2006-01-11 | 哈尔滨工业大学 | No swirling flow dynamic pressure air thrust bearing |
| CN201106631Y (en) * | 2007-10-15 | 2008-08-27 | 中国科学院工程热物理研究所 | Dynamical pressure air bearing of interval channel self-lubricating structure |
| 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 |
| CN203176168U (en) * | 2013-04-22 | 2013-09-04 | 哈尔滨耦合动力工程技术中心有限公司 | Scaling structure type linear dynamic pressure gas bearing |
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Address after: Room 601, Building A2, Huizhi Science and Technology Park, Hengtai Road, Economic and Technological Development Zone, Nanjing City, Jiangsu Province, 210038 Patentee after: Nanjing Coupling Power Engineering Technology Co.,Ltd. Address before: No. 99, Keji 1st Street, Songbei District, Harbin, Heilongjiang 150028 Patentee before: Harbin Coupled Power Engineering Technology Centre Co.,Ltd. |