CN103195808A - Scaling structure type linear dynamic pressure gas bearing and design method - Google Patents
Scaling structure type linear dynamic pressure gas bearing and design method Download PDFInfo
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- CN103195808A CN103195808A CN2013101401669A CN201310140166A CN103195808A CN 103195808 A CN103195808 A CN 103195808A CN 2013101401669 A CN2013101401669 A CN 2013101401669A CN 201310140166 A CN201310140166 A CN 201310140166A CN 103195808 A CN103195808 A CN 103195808A
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Abstract
The invention relates to a scaling structure type linear dynamic pressure gas bearing and a manufacturing method. A gas lubrication technology originates in the middle of 19th century, and a gas-lubricated bearing, as a supporting technology with high speed, low power consumption and high precision, is widely applied to rotary machines such as gyroscopic instruments, electronic computer memory units, high speed machine tools, centrifugal machines, compressors, blowers and pumps. The scaling structure type linear dynamic pressure gas bearing comprises a bearing body (1), wherein a dynamic pressure structure, which is scaling-shaped linear pressurization channel slot, is formed in the inner surface of the bearing body. The bearing is used for supporting a high-speed rotary machine.
Description
Technical field:
The present invention relates to a kind of pantograph structure molded lines kinetic pressure air-float bearing of inner and manufacture method.
Background technique:
The gas lubrication technique functions comes from the middle of the 19th century, gas bearing is widely used in the rotating machineries such as gyroscopic instrument, electronic computer memory, high-speed machine tool, centrifuge, compressor, blower fan and pump as high speed, low power consumption, high-accuracy supporting technology.Under environment such as some superhigh temperature, ultralow temperature and intense radiation, gas bearing has special advantages such as unlubricated dose, pollution-free, the movement-less part of bearing own, contactless motion.
Aero dynamic bearing is to produce pressure field in the convergence wedge shape of viscosity gas between two relative moving surfaces, forms air film power supporting rotor and rotates at a high speed, be i.e. dynamic pressure effect.Its essence that produces bearing capacity is fluid in order to keep the conservation of mass, momentum conservation and energy conservation, when not waiting for the thickness of air film between two relative moving surfaces: when thickness reduces along moving direction, have the malleation generation above ambient pressure in the gap; When thickness increases along moving direction, produce negative pressure in the gap.Therefore, the molded lines quality of bearing inner surface directly affects the thickness of air film, and then influences the bearing capacity of bearing.
[0004] on the other hand, aero dynamic bearing is because the attribute of self structure, and namely gas film pressure is not direction along bearing capacity with joint efforts, and a part of component is whirling motion power, makes bearing be prone to unstability, influences antiwhip.
Therefore, the key technology of hydraulic bearing is the design of bearing molded lines.The hydraulic bearing molded lines of appropriate design can increase useful part---the bearing capacity that air film distributes on the one hand, has improved the bearing capacity of bearing; Can reduce nonuseable part on the other hand---whirling motion power has namely increased the stability of rotating machinery.
In hydraulic bearing patent in the past, for example: the kinetic pressure air-float bearing of inner of flow passage self-lubricating structure, application number: 200720177829.4, see Fig. 1.Adopt conduit in the simple rectangle of tradition, the molded lines of conduit can not be brought into play the optimum effect of dynamic pressure, thereby can cause carrying deficiency and Aerodynamic Instability problem.
Summary of the invention:
The purpose of this invention is to provide the special parameter in a kind of pantograph structure molded lines kinetic pressure air-float bearing of inner and the manufacturing.
Above-mentioned purpose realizes by following technological scheme:
A kind of pantograph structure molded lines kinetic pressure air-float bearing of inner, its composition comprises: bearing support, described bearing support internal surface has hydrodynamic configuration, and described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove.
Described pantograph structure molded lines kinetic pressure air-float bearing of inner, described convergent-divergent shape line supercharging flow path groove are Rafael nozzle molded lines supercharging flow path groove or fish head dummy line supercharging flow path groove.
A kind of manufacture method of pantograph structure molded lines kinetic pressure air-float bearing of inner is characterized in that: this method comprises the steps:
(1) to select bearing application of temperature T＜500 ℃, working medium for use be the air under the external pressure to bearing support, selects to have wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from as air-bearing body material;
(2) static load born of air-bearing is that 3 ~ 5 kilograms, working rotor rotating speed are 100000rpm ~ 150000rpm, and internal surface is offered the structure of pantograph structure type supercharging flow path groove;
(3) requirement of the load character born of pneumatic bearing body pipe office hydrodynamic seal ring, stability, adopting the elastic caoutchouc circle is the damping technology measure, guarantees hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(4) processing of pneumatic bearing and the technological requirement of making according to the structural design of hydrodynamic seal ring can be satisfied numerical control device or the special device of required precision and make, processes and assemble.
Beneficial effect:
1. pantograph structure molded lines air supporting hydraulic bearing of the present invention is a kind of air-bearing of new structure form.The structure characteristic of this kinetic pressure air-float bearing of inner is to offer pantograph structure (Rafael nozzle molded lines and fish head dummy line) supercharging flow path groove structure at bearing inner surface; Bearing support adopts the material of wear-resisting, high temperature resistant and self-lubricating property, and the structural design of carrying out with damping technology measures such as rubber ring, metal-rubber and elastic composites.This hydraulic bearing adopts the internal surface molded lines of appropriate design, increases the active constituent that gas film pressure distributes on the one hand, has improved the bearing capacity of bearing; Reducing harmful component on the other hand is whirling motion power, has increased the stability of rotating machinery.Therefore, this pure kinetic pressure air-float bearing of inner has the bearing capacity height, and is stable, reliability is high, further widened the scope that the air-bearing product engineering is used.
The present invention is by the bearing inner surface molded lines of appropriate design, and change bearing pressure from structure and distribute: gas enters the groove, radially forms gas film pressure because air-film thickness is different; Vertically because the pantograph structure of groove forms different pressure distribution.Both direction all forms effective bearing capacity, can improve stability and the reliability of air-bearing carrying, has further widened the scope that air-bearing is used.
The present invention proposes a kind of aero dynamic bearing of new structure form, that is: pantograph structure molded lines air-bearing, and principal mode comprises Rafael nozzle molded lines and fish head dummy line.By the bearing inner surface molded lines of appropriate design, change bearing pressure from structure and distribute: gas enters the groove, radially forms gas film pressure because air-film thickness is different; Vertically because the pantograph structure of groove forms different pressure distribution.Both direction all forms effective bearing capacity, can improve stability and the reliability of air-bearing carrying, has further widened the scope that air-bearing is used.
Description of drawings:
Accompanying drawing 1 is the kinetic pressure air-float bearing of inner structural representation of flow passage self-lubricating structure.
Accompanying drawing 2 is that convergent-divergent shape line supercharging flow path groove is the expansion schematic representation of the bearing support of fish head dummy line.
Accompanying drawing 3 is that convergent-divergent shape line supercharging flow path groove is the expansion schematic representation of the bearing support of Rafael nozzle molded lines.
Embodiment:
Embodiment 1:
A kind of pantograph structure molded lines kinetic pressure air-float bearing of inner, its composition comprises: bearing support 1, described bearing support internal surface has hydrodynamic configuration, and described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove.
Embodiment 2:
According to embodiment's 1 described pantograph structure molded lines kinetic pressure air-float bearing of inner, described convergent-divergent shape line supercharging flow path groove is that Rafael nozzle molded lines supercharging flow path groove or fish head dummy line supercharging flow path groove grooved line are by different angles, regulate air film radially with axial pressure distribution: when the grooved line when axially angle is big, radially air film power is bigger; Angle hour, axially air film power is bigger.
Fish header structure molded lines groove width distributes asymmetric, reduces earlier afterwards to increase, and reduces different with the slope that increases; Rafael nozzle structural type wire casing is wide to be symmetrical distribution, reduces earlier afterwards to increase.According to the characteristics that form air film power, be applied to respectively during long bearing and minor axis hold.
Embodiment 3:
A kind of manufacture method of pantograph structure molded lines kinetic pressure air-float bearing of inner, this method comprises following parameter:
(1) selection of air-bearing body material, i.e. conditions of using according to air-bearing such as temperature, pressure and working medium, 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, i.e. the rotation of the conditions of using according to air-bearing such as temperature, pressure and working medium, and axle journal, whirling motion rotating speed and bear load character are rationally determined pantograph structure molded lines shape;
(3) body structure of air-bearing design, the i.e. requirement of the load character of bearing according to air-bearing, stability and conditions such as working medium, adopt measures such as rubber ring, metal-rubber and elastic composite, finish the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(4) processing of air-bearing and manufacturing, namely according to the technological requirement of air-bearing structural design, selection can be satisfied the equipment of required precision and make, processes and assemble.
Embodiment 4:
Design method according to embodiment's 3 described pantograph structure molded lines kinetic pressure air-float bearing of inner specifically comprises the steps:
(1) selection of bearing support: be the air under the external pressure according to bearing application of temperature T＜500 ℃, working medium, select to have wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from as air-bearing body material;
(2) 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;
(3) structural design of pneumatic bearing body: the requirement of the load character of bearing according to the hydrodynamic seal ring, stability, adopting the elastic caoutchouc circle is the damping technology measure, finishes the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(4) processing of pneumatic bearing and manufacturing: according to the technological requirement of the structural design of hydrodynamic seal ring, selection can be satisfied numerical control device or the special device of required precision and make, processes and assemble.
Claims (3)
1. pantograph structure molded lines kinetic pressure air-float bearing of inner, its composition comprises: bearing support is characterized in that: described bearing support internal surface has hydrodynamic configuration, and described hydrodynamic configuration is convergent-divergent shape line supercharging flow path groove.
2. pantograph structure molded lines kinetic pressure air-float bearing of inner according to claim 1, it is characterized in that: described convergent-divergent shape line supercharging flow path groove is Rafael nozzle molded lines supercharging flow path groove or fish head dummy line supercharging flow path groove.
3. the manufacture method of a pantograph structure molded lines kinetic pressure air-float bearing of inner, it is characterized in that: this method comprises the steps:
(1) to select bearing application of temperature T＜500 ℃, working medium for use be the air under the external pressure to bearing support, selects to have wear-resisting, the high temperature resistant carbon graphite alloy of greasy property of sending from as air-bearing body material;
(2) static load born of air-bearing is that 3 ~ 5 kilograms, working rotor rotating speed are 100000rpm ~ 150000rpm, and internal surface is offered the structure of pantograph structure type supercharging flow path groove;
(3) requirement of the load character born of pneumatic bearing body pipe office hydrodynamic seal ring, stability, adopting the elastic caoutchouc circle is the damping technology measure, guarantees hydrodynamic bearing sealing ring structure, intensity and stability of motions;
(4) processing of pneumatic bearing and the technological requirement of making according to the structural design of hydrodynamic seal ring can be satisfied numerical control device or the special device of required precision and make, processes and assemble.
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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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| 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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| CN103195808B CN103195808B (en) | 2016-08-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110195744A (en) * | 2019-05-27 | 2019-09-03 | 中国航天空气动力技术研究院 | A kind of air-bearing structure having rapid cooling function |
Citations (7)
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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 |
| 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 |
| 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 |
-
2013
- 2013-04-22 CN CN201310140166.9A patent/CN103195808B/en active Active
Patent Citations (7)
| 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 |
| 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 |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110195744A (en) * | 2019-05-27 | 2019-09-03 | 中国航天空气动力技术研究院 | A kind of air-bearing structure having rapid cooling function |
| 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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| CN103195808B (en) | 2016-08-03 |
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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. |