CN103453017A - Dynamic and static pressure air floating bearing with zooming structure molded line - Google Patents
Dynamic and static pressure air floating bearing with zooming structure molded line Download PDFInfo
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- CN103453017A CN103453017A CN2013103969347A CN201310396934A CN103453017A CN 103453017 A CN103453017 A CN 103453017A CN 2013103969347 A CN2013103969347 A CN 2013103969347A CN 201310396934 A CN201310396934 A CN 201310396934A CN 103453017 A CN103453017 A CN 103453017A
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Abstract
The invention provides a dynamic and static pressure air floating bearing with a zooming structure molded line. A conventional air floating bearing adopts a simple rectangular inner slot channel and a molded line of the slot channel cannot express the optimal effect of a dynamic pressure so that the bearing is not enough at a low rotary speed and the air operation is not stable at a high rotary speed. The dynamic and static pressure air floating bearing comprises a bearing body (2), wherein a dynamic pressure structure is arranged on the inner surface of the bearing body; a zooming molded line pressurizing flow channel slot (3) is adopted as the dynamic pressure structure; the bearing body has a static pressure structure; the static pressure structure comprises an air supplying hole (4); the air supplying hole is communicated with a throttling opening nozzle (5); the bearing body is provided with an elastic ring (6). The dynamic and static pressure air floating bearing with the zooming structure molded line is used for supporting a high-speed rotary machine.
Description
technical field:
the present invention relates to a kind of pantograph structure molded line active and static pressure air-bearing.
background technique:
the 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, thereby object is supported.Air-bearing has advantages such as " light and handy, clean, running is level and smooth, environmental suitability is strong, temperature wide accommodation ", therefore be widely used in the industries such as national defence, the energy, lathe and medical treatment, especially at High speed Rotating Mechanical Devices and ultraprecise Instrument technology field, obvious superiority more arranged.([day] ten closed Jin Yizhu, and Han Huanchen translates " pneumatic bearing----design, exploration and application ", Yuhang Publishing House, 1988).
the principle that the air-bearing pressing force produces, can be divided into hydrostatic profile and dynamic pressure type.The hydrostatic profile bearing is from outside input superheated steam, through flow controller, enters bearing, produces the carrying lubrication effect.Advantage is for relying on ambient pressure gas to carry out pressure-bearing, and friction factor is little; Shortcoming, for needing a set of air supply system, has increased complexity and the expense of equipment.Aero dynamic bearing is to produce pressure field in the convergence wedge shape of viscous gas between two relative moving surfaces, forms air film power supporting rotor High Rotation Speed.Advantage is to produce 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, can meet static supporting needs under low speed, can adapt to again the lower ability that keeps stable operation at a high speed.(Wang Yunfei, " gas lubrication is theoretical to be designed with gas bearing ", China Machine Press, 1999).
the problem of the main existence 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 supercharging flow path groove, when the static-pressure system air feed is inhomogeneous or rotor while having vibration, the flow field that the air that spray nozzle of the gas supply is come in forms easily produces disturbance, bearing two supports rigidity is no longer equal, cause high-speed rotating machine vibration or when serious unstability shut down; Adopt conduit in the simple rectangle of tradition, the molded line of conduit can not be brought into play the optimum effect of dynamic pressure, thereby can cause under the slow-speed of revolution the not enough and problem of aerodynamic instability under high rotating speed of carrying.
summary of the invention:
the purpose of this invention is to provide a kind of pantograph structure molded line active and static pressure air-bearing.
above-mentioned purpose realizes 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, there is the static pressure structure on described bearing support, described static pressure structure comprises air vent, and described air vent communicates with the restriction nozzle, on described bearing support, elastic ring is installed.
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) described bearing support: be the air under external pressure according to bearing application of temperature T<500 ℃, working medium, select to there is wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from as air-bearing body material;
(2) described static pressure structure: 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 the bearing support internal surface;
(3) described hydrodynamic configuration: the static load of bearing according to air-bearing is that 3 ~ 5 kilograms, working rotor rotating speed are 100000rpm ~ 150000rpm, and internal surface is offered the structural design of pantograph structure type supercharging flow path groove.
beneficial effect:
1. the present invention is located at baroport in the groove platform, and the interference of dynamic pressure effect to pressurized air while having reduced high speed makes bearing have all the time static pressure and the dual bearing capacity of dynamic pressure and damping; Hydrodynamic configuration is to offer 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 the material of wear-resisting, high temperature resistant and self-lubricating property, and by damping technology structural designs such as rubber ring, metal-rubber and elastic composites.
2. the pantograph structure molded line that active and static pressure air-bearing of the present invention adopts can complete the variable resistance Buddhist nun, speedup increases dynamic pressure, slowing down becomes the function of static pressure, greatly improved the ability that bearing bears plus load, increase damping capacity, strengthen sound parts short-time contact wear-resisting property, but also reduced 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, and the advantage stable under high speed, that reliability is high has further been widened the scope of air-bearing product engineering application.
3. the present invention consists of static pressure structure and hydrodynamic configuration.Static-pressure system adopts orifice restriction, and the internal surface restriction has two rows, lays respectively on the groove platform, and restriction nozzle direction and bearing inner surface are tangential and intersect.The dynamic pressure system is mainly by the realization of 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 the groove platform, and the interference of dynamic pressure effect to pressurized air while having reduced high speed, make bearing have all the time static pressure and the dual bearing capacity of dynamic pressure and damping.
the pantograph structure molded line adopted improves traditional rectangular configuration molded line, can complete the variable resistance Buddhist nun, speedup increases dynamic pressure, slowing down becomes the function of static pressure, greatly improved the ability that bearing bears plus load, increase the High Rotation Speed that the damping capacity purpose is to realize rotor, that is:, by the internal surface Profile Design of rational bearing, change bearing pressure from structure and distribute, gas enters in groove, radially because air-film thickness is different, forms gas film pressure; Because the pantograph structure of groove forms different pressure distribution, reduce the whirling motion component of force vertically, postpone or suppress half-speed vortex, can effectively improve the Stability and dependability of air-bearing carrying, further widened the scope of air-bearing application.
the accompanying drawing explanation:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is A-A sectional views of accompanying drawing 1.
accompanying drawing 3 is expansion schematic diagram of the convergent-divergent shape line supercharging flow path groove bearing support that is fish head dummy line.
accompanying drawing 4 is expansion schematic diagram of the convergent-divergent shape line supercharging flow path groove bearing support that is the 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, has the static pressure structure on described bearing support, and described static pressure structure comprises air vent 4, described air vent communicates with restriction nozzle 5, elastic ring 6 is installed on described bearing support, and as shown in Figure 1, the rotor diameter of axle 1 is arranged in described bearing support.
embodiment 2:
according to the described pantograph structure molded line of embodiment 1 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.The grooved line is by different angles, regulate air film radially with axial pressure distribution: when the grooved line, when axially angle is larger, radially air film power is larger; Hour, axially air film power is larger for angle.
according to the characteristics that form air film power, be applied to respectively during long bearing and minor axis hold; 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 tangential and intersect.
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 tangential and intersect.
embodiment 3:
the described pantograph structure molded line of embodiment 1 or 2 active and static pressure air-bearing:
(1) selection of air-bearing body material, temperature, pressure and the working medium according to air-bearing, 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, temperature, the pressure according to air-bearing, applied
and the condition such as working medium, and axle journal rotation, whirling motion rotating speed with bear load character, rationally determine pantograph structure molded line shape; The static pressure structural design is taked orifice restriction;
(3) body structure of air-bearing design, the load character of bearing according to air-bearing, steady
the conditions such as requirement and working medium, adopt the measures such as rubber ring, metal-rubber and elastic composite qualitatively, completes the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(4) processing of air-bearing and manufacture,, according to the technological requirement of air-bearing structural design, selection can meet the equipment of required precision and manufactured, processes and assemble.
embodiment 4:
according to the described pantograph structure molded line of embodiment 3 active and static pressure air-bearing, specifically comprise the steps:
(1) selection of bearing support: be the air under external pressure according to bearing application of temperature T<500 ℃, working medium, select to there is wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from 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 the bearing support internal surface;
(3) hydrodynamic configuration of the structure of gas-static, pneumatic bearing design: the static load of bearing according to air-bearing is that 3 ~ 5 kilograms, working rotor rotating speed are 100000rpm ~ 150000rpm, and internal surface is offered the structural design of pantograph structure type supercharging flow path groove;
(4) structural design of pneumatic bearing body: the load character of bearing according to the hydrodynamic seal ring,
the requirement of stability, adopting elastic rubber ring is the 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, selection can meet numerical control device or the special device of required precision and manufactured, processes and assemble.
Claims (3)
1. a 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, there is the static pressure structure on described bearing support, described static pressure structure comprises air vent, and described air vent communicates with the restriction nozzle, on described bearing support, elastic ring is installed.
2. pantograph structure molded line active and static pressure air-bearing according to claim 1, it is characterized in that: 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.
3. pantograph structure molded line active and static pressure air-bearing according to claim 1 and 2 is characterized in that:
(1) described bearing support: be the air under external pressure according to bearing application of temperature T<500 ℃, working medium, select to there is wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from as air-bearing body material;
(2) described static pressure structure: 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 the bearing support internal surface;
(3) described hydrodynamic configuration: the static load of bearing according to air-bearing is that 3 ~ 5 kilograms, working rotor rotating speed are 100000rpm ~ 150000rpm, and internal surface is offered the structural design of pantograph structure type supercharging flow path groove.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN201310165296 | 2013-05-08 | ||
| CN201310165296.8 | 2013-05-08 | ||
| CN2013101652968 | 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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| CN103453017B CN103453017B (en) | 2016-04-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244560A (en) * | 2013-05-16 | 2013-08-14 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic-static pressure air-floating bearing with zooming-structure molded lines |
| CN104014823A (en) * | 2014-06-24 | 2014-09-03 | 上海大学 | Electric spindle of bidirectional herringbone groove hydrodynamic/hydrostatic integrated gas bearing support |
| CN106545576A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工业大学 | Fluid structurecoupling formula gas shock-wave adjusts bearing |
| CN103244560B (en) * | 2013-05-16 | 2018-08-31 | 哈尔滨耦合动力工程技术中心有限公司 | Pantograph structure molded line dynamic and static pressure air-bearing |
| CN111577765A (en) * | 2020-05-22 | 2020-08-25 | 中国科学院工程热物理研究所 | Static pressure type radial gas bearing structure |
| CN115978092A (en) * | 2023-03-21 | 2023-04-18 | 中国空气动力研究与发展中心空天技术研究所 | Supporting structure of ultra-high speed miniature rotor and design method of supporting structure |
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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 |
| 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 |
| US20090161998A1 (en) * | 2007-12-20 | 2009-06-25 | Lei Jiang | Method for optimizing a grooved bearing pattern on a bearing surface of a fluid dynamic bearing for the purpose of improving the bearing properties and an appropriate grooved bearing pattern |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| 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 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244560A (en) * | 2013-05-16 | 2013-08-14 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic-static pressure air-floating bearing with zooming-structure molded lines |
| CN103244560B (en) * | 2013-05-16 | 2018-08-31 | 哈尔滨耦合动力工程技术中心有限公司 | Pantograph structure molded line dynamic and static pressure air-bearing |
| CN104014823A (en) * | 2014-06-24 | 2014-09-03 | 上海大学 | Electric spindle of bidirectional herringbone groove hydrodynamic/hydrostatic integrated gas bearing support |
| CN106545576A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工业大学 | Fluid structurecoupling formula gas shock-wave adjusts bearing |
| CN106545576B (en) * | 2017-01-18 | 2020-07-24 | 哈尔滨工业大学 | Fluid-solid coupling type gas shock wave adjusting bearing |
| CN111577765A (en) * | 2020-05-22 | 2020-08-25 | 中国科学院工程热物理研究所 | Static pressure type radial gas bearing structure |
| 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 |
| CN115978092A (en) * | 2023-03-21 | 2023-04-18 | 中国空气动力研究与发展中心空天技术研究所 | Supporting structure of ultra-high speed miniature rotor and design method of supporting 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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| CN103453017B (en) | 2016-04-06 |
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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. |