CN103453017B - Pantograph structure molded line active and static pressure air-bearing - Google Patents
Pantograph structure molded line active and static pressure air-bearing Download PDFInfo
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- CN103453017B CN103453017B CN201310396934.7A CN201310396934A CN103453017B CN 103453017 B CN103453017 B CN 103453017B CN 201310396934 A CN201310396934 A CN 201310396934A CN 103453017 B CN103453017 B CN 103453017B
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Abstract
<b> pantograph structure molded line active and static pressure air-bearing.Traditional air-bearing adopts simple rectangular inner groove road, and the molded line of conduit can not play the optimum effect of dynamic pressure, thus the not enough and problem that is aerodynamic instability under high rotating speed of carrying under the slow-speed of revolution can be caused.Composition of the present invention comprises: bearing support (</b><bGreatT.Gre aT.GT2</b><bGrea tT.GreaT.GT), described bearing support internal surface has hydrodynamic configuration, described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove (</b><bGreatT.Gre aT.GT3</b><bGrea tT.GreaT.GT), described bearing support has hydrostatic, described hydrostatic comprises air vent (</b><bGreatT.Gre aT.GT4</b><bGrea tT.GreaT.GT), described air vent communicates with restriction nozzle (</b><bGreatT.Gre aT.GT5</b><bGrea tT.GreaT.GT), described bearing support is provided with elastic ring (</b><bGreatT.Gre aT.GT6</b><bGrea tT.GreaT.GT).The present invention is for supporting high-speed rotating machine.</b>
Description
technical field:
the present invention relates to a kind of pantograph structure molded line active and static pressure air-bearing.
background technique:
gas bearing technology is the new and high technology developed rapidly mid-term in 20th century, and it utilizes the viscosity of gas, improves the pressure of gas in gap, thus object supporting is got up.Advantages such as " lightly, totally, smooth movement, environmental suitability are strong, Acclimation temperature scope is wide " that air-bearing has, therefore be widely used in the industries such as national defence, the energy, lathe and medical treatment, especially more have obvious superiority at High speed Rotating Mechanical Devices and ultraprecise Instrument technology field.(closing Jin Yizhu, Han Huanchen [day] ten to translate " pneumatic bearing----design, exploration and application ", Yuhang Publishing House, 1988).
the principle that air-bearing pressing force produces, can be divided into hydrostatic profile and dynamic pressure type.Hydrostatic profile bearing is from outside input superheated steam, enters bearing, produce carrying lubrication effect through flow controller.Advantage carrys out pressure-bearing for relying on ambient pressure gas, and friction factor is little; Shortcoming, for needing a set of air supply system, adds complexity and the expense of equipment.Aero dynamic bearing produces pressure field in the convergence wedge shape of viscous gas between two relative motion surface, forms air film power supporting rotor High Rotation Speed.Advantage is producing in good dynamic pressure effect situation, having higher rigidity and bearing capacity; During shortcoming is start-stop, rub comparatively serious.The advantage of the comprehensive hydrostatic bearing of active and static pressure air-bearing and hydraulic bearing, static supporting needs under can meeting low speed, can adapt to again the lower ability keeping stable operation at a high speed.(Wang Yunfei, " gas lubrication is theoretical to be designed with gas bearing ", China Machine Press, 1999).
the main Problems existing of hybrid air-bearing was in the past: the spray nozzle of the gas supply of static-pressure system is positioned at dynamic pressure system boost flow path groove, when static-pressure system air feed is uneven or rotor there is vibration, the flow field that the air that spray nozzle of the gas supply is come in is formed easily produces disturbance, bearing two supports rigidity is no longer equal, cause high-speed rotating machine to vibrate or serious time unstability shut down; Adopt the simple rectangular inner groove road of tradition, the molded line of conduit can not play the optimum effect of dynamic pressure, thus the not enough and problem that is aerodynamic instability under high rotating speed of carrying under the slow-speed of revolution can be caused.
summary of the invention:
the object of this invention is to provide a kind of pantograph structure molded line active and static pressure air-bearing.
above-mentioned object is realized by following technological scheme:
a kind of pantograph structure molded line active and static pressure air-bearing, its composition comprises: bearing support, described bearing support internal surface has hydrodynamic configuration, described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove, described bearing support has hydrostatic, described hydrostatic comprises air vent, and described air vent communicates with restriction nozzle, and described bearing support is provided with elastic ring.
described pantograph structure molded line active and static pressure air-bearing, described convergent-divergent shape line supercharging flow path groove is Rafael nozzle molded line supercharging flow path groove or fish head dummy line supercharging flow path groove.
described pantograph structure molded line active and static pressure air-bearing:
(1) bearing support described in: be the air under external pressure according to bearing application of temperature T<500 DEG C, working medium, selects to have the carbon graphite alloy of wear-resisting, high temperature resistant and self-lubricating property as air-bearing body material;
(2) hydrostatic described in: adopt orifice restriction, double perforate, the position in hole is as far as possible far away
from the axial symmetry center of bearing, restriction nozzle direction is radially tangent in bearing support internal surface;
(3) hydrodynamic configuration described in: the static load born according to air-bearing is 3 ~ 5 kilograms, working rotor rotating speed is 100000rpm ~ 150000rpm, and internal surface offers the structural design of pantograph structure type supercharging flow path groove.
beneficial effect:
1. baroport is located in groove platform by the present invention, and when reducing high speed, dynamic pressure effect is to the interference of pressurized air, makes bearing have static pressure and the dual bearing capacity of dynamic pressure and damping all the time; Hydrodynamic configuration offers convergent-divergent shape line (Rafael nozzle molded line and fish head dummy line) supercharging flow path groove structural design at bearing inner surface; Dynamic and static pressure composite design, bearing support adopt material that is wear-resisting, high temperature resistant and self-lubricating property, the damping technology structural designs such as blend rubber circle, metal-rubber and elastic composite.
2. the pantograph structure molded line that active and static pressure air-bearing of the present invention adopts can complete mutative damp, speedup increases dynamic pressure, slowing down becomes the function of static pressure, drastically increase the ability that bearing bears plus load, increase damping capacity, enhance sound parts short-time contact wear-resisting property, but also reduce the requirement of the indexs such as, temperature impure to working medium.Therefore, it is high that this active and static pressure air-bearing has bearing capacity, the advantage stable at a high speed, reliability is high, widened the scope of air-bearing product engineering application further.
3. the present invention is made up of hydrostatic and hydrodynamic configuration.Static-pressure system adopts orifice restriction, and internal surface restriction has two rows, lays respectively on groove platform, and restriction nozzle direction and bearing inner surface are in tangential crossing.Dynamic pressure system realizes mainly through pantograph structure molded line, and pantograph structure molded line principal mode comprises Rafael nozzle molded line and fish head dummy line.
4. the location arrangements of hydrostatic bearing restriction of the present invention is on groove platform, and when reducing high speed, dynamic pressure effect is to the interference of pressurized air, makes bearing have static pressure and the dual bearing capacity of dynamic pressure and damping all the time.
the pantograph structure molded line adopted improves traditional rectangular configuration molded line, mutative damp can be completed, speedup increases dynamic pressure, slowing down becomes the function of static pressure, drastically increase the ability that bearing bears plus load, increase damping capacity object and be the High Rotation Speed realizing rotor, that is: by the internal surface Profile Design of rational bearing, change bearing pressure distribution from structure, gas enters in groove, radially because air-film thickness difference forms gas film pressure; Vertically because the pantograph structure of groove forms different pressure distribution, reduce the component of whirling motion power, postpone or suppress half-speed vortex, effectively can improve the Stability and dependability of air-bearing carrying, having widened the scope of air-bearing application further.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is A-A sectional views of accompanying drawing 1.
the expansion schematic diagram of accompanying drawing 3 to be convergent-divergent shape line supercharging flow path grooves the be bearing support of fish head dummy line.
the expansion schematic diagram of accompanying drawing 4 to be convergent-divergent shape line supercharging flow path grooves the be bearing support of Rafael nozzle molded line.
embodiment:
embodiment 1:
a kind of pantograph structure molded line active and static pressure air-bearing, its composition comprises: bearing support 2, described bearing support internal surface has hydrodynamic configuration, described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove 3, and described bearing support has hydrostatic, and described hydrostatic comprises air vent 4, described air vent communicates with restriction nozzle 5, described bearing support is provided with elastic ring 6, as shown in Figure 1, the rotor diameter of axle 1 is arranged in described bearing support.
embodiment 2:
pantograph structure molded line active and static pressure air-bearing according to embodiment 1, described convergent-divergent shape line supercharging flow path groove is Rafael nozzle molded line supercharging flow path groove or fish head dummy line supercharging flow path groove.Grooved line by different angles, regulate air film radially with the pressure distribution of axis: when grooved line and axial angle larger time, radial air film power is larger; When angle is less, axial air film power is larger.
according to the feature forming air film power, be applied to during long bearing and minor axis hold respectively; Internal surface static pressure orifice restriction mouth has two rows, lays respectively on pantograph structure molded line groove platform, and restriction nozzle direction and bearing inner surface are in tangential crossing.
internal surface static pressure orifice restriction mouth has two rows, lays respectively on pantograph structure molded line groove platform, and restriction nozzle direction and bearing inner surface are in tangential crossing.
embodiment 3:
pantograph structure molded line active and static pressure air-bearing described in embodiment 1 or 2:
(1) selection of air-bearing body material, namely according to temperature, pressure and working medium that air-bearing is applied
etc. condition, the performance materials of wear-resisting, the high temperature resistant and selflubricating of choose reasonable is as air-bearing body material;
(2) the hydrodynamic structural design of air-bearing, namely according to temperature, the pressure of air-bearing application
and the condition such as working medium, and axle journal rotates, whirling motion rotating speed with bear load character, rationally determine pantograph structure molded line shape; Orifice restriction is taked in hydrostatic design;
(3) the body structure design of air-bearing, the load character namely born according to air-bearing, steady
the condition such as requirement and working medium, adopts the measures such as rubber ring, metal-rubber and elastic composite, completes the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions qualitatively;
(4) processing of air-bearing and manufacture, namely according to the technological requirement of air-bearing structural design, selects the equipment that can meet required precision to carry out manufacturing, process and assembling.
embodiment 4:
pantograph structure molded line active and static pressure air-bearing according to embodiment 3, specifically comprises the steps:
(1) selection of bearing support: be the air under external pressure according to bearing application of temperature T<500 DEG C, working medium, selects to have the carbon graphite alloy of wear-resisting, high temperature resistant and self-lubricating property as air-bearing body material;
(2) structural design of gas-static: adopt orifice restriction, double perforate, the position in hole is as far as possible far away
from the axial symmetry center of bearing, restriction nozzle direction is radially tangent in bearing support internal surface;
(3) structure of gas-static, the hydrodynamic configuration design of pneumatic bearing: the static load born according to air-bearing is 3 ~ 5 kilograms, working rotor rotating speed is 100000rpm ~ 150000rpm, and internal surface offers the structural design of pantograph structure type supercharging flow path groove;
(4) structural design of pneumatic bearing body: the load character born according to hydrodynamic seal ring,
the requirement of stability, adopts elastic rubber ring to be damping technology measure, completes the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(5) processing of pneumatic bearing and manufacture: according to the technological requirement of the structural design of hydrodynamic seal ring, numerical control device or the special device of selecting to meet required precision carry out manufacturing, process and assembling.
Claims (1)
1.
a kind of pantograph structure molded line active and static pressure air-bearing, its composition comprises: bearing support, it is characterized in that: described bearing support internal surface has hydrodynamic configuration, described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove, described bearing support has hydrostatic, described hydrostatic comprises air vent, and described air vent communicates with restriction nozzle, and described bearing support is provided with elastic ring;
described convergent-divergent shape line supercharging flow path groove is Rafael nozzle molded line supercharging flow path groove or fish head dummy line supercharging flow path groove; Grooved line by different angles, regulate air film radially with the pressure distribution of axis: when grooved line and axial angle larger time, radial air film power is larger; When angle is less, axial air film power is larger;
described bearing support: be the air under external pressure according to bearing application of temperature T<500 DEG C, working medium, selects to have the carbon graphite alloy of wear-resisting, high temperature resistant and self-lubricating property as air-bearing body material;
described hydrostatic: adopt orifice restriction, double perforate, the position in hole is as far as possible away from the axial symmetry center of bearing, and restriction nozzle direction is radially tangent in bearing support internal surface;
described hydrodynamic configuration: the static load born according to air-bearing is 3 ~ 5 kilograms, working rotor rotating speed is 100000rpm ~ 150000rpm, and internal surface offers the structural design of pantograph structure type supercharging flow path groove.
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| CN201310396934.7A CN103453017B (en) | 2013-05-08 | 2013-09-04 | Pantograph structure molded line active and static pressure air-bearing |
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| CN2013101652968 | 2013-05-08 | ||
| CN201310165296 | 2013-05-08 | ||
| CN201310165296.8 | 2013-05-08 | ||
| CN201310396934.7A CN103453017B (en) | 2013-05-08 | 2013-09-04 | Pantograph structure molded line active and static pressure air-bearing |
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| CN103453017A CN103453017A (en) | 2013-12-18 |
| CN103453017B true CN103453017B (en) | 2016-04-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104014823A (en) * | 2014-06-24 | 2014-09-03 | 上海大学 | Electric spindle of bidirectional herringbone groove hydrodynamic/hydrostatic integrated gas bearing support |
| CN106545576B (en) * | 2017-01-18 | 2020-07-24 | 哈尔滨工业大学 | Fluid-solid coupling type gas shock wave adjusting bearing |
| CN111577765B (en) * | 2020-05-22 | 2022-03-15 | 中国科学院工程热物理研究所 | Static pressure type radial gas bearing structure |
| CN115978092B (en) * | 2023-03-21 | 2023-06-16 | 中国空气动力研究与发展中心空天技术研究所 | Support structure of ultra-high speed micro rotor and design method of support structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2624849C3 (en) * | 1976-06-03 | 1981-12-03 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Self-pressure generating radial plain bearing |
| CN1282830C (en) * | 2005-02-17 | 2006-11-01 | 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 |
| 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 |
| 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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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. |