CN101413540A - Kinetic pressure air-float bearing of inner flow passage self-lubricating structure - Google Patents
Kinetic pressure air-float bearing of inner flow passage self-lubricating structure Download PDFInfo
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- CN101413540A CN101413540A CNA2007101639949A CN200710163994A CN101413540A CN 101413540 A CN101413540 A CN 101413540A CN A2007101639949 A CNA2007101639949 A CN A2007101639949A CN 200710163994 A CN200710163994 A CN 200710163994A CN 101413540 A CN101413540 A CN 101413540A
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Abstract
The invention discloses a dynamic air bearing with a self-lubricating structure of an internal channel, and relates to bearing technologies. A rotor journal surface of the bearing is smooth, the inner surface of a bearing body is provided with a pressure flow channel groove structure; the inner surface of the bearing body is made of wear resistant and high temperature resistant materials with high strength and a solid self-lubricating property; and the structural design is adopted by taking vibration reducing measures of rubber band, metal rubber and elastic composite materials. The bearing greatly improves the wear resistant property of a contact surface in a short time such as start time and stop time, reduces the requirements for indexes such as working substances, impurities, temperature and the like, can effectively improve the bearing stability and reliability of the air bearing, and further broadens the application range of the air bearing.
Description
Technical field
The present invention relates to technical field of bearings, be used for high-speed rotating machine, is a kind of kinetic pressure air-float bearing of inner of flow passage self-lubricating structure.
Background technique
Air-bearing is a new high-tech product that develops rapidly mid-term in 20th century, it is compared with conventional oily lubricating bearings (rolling bearing or oily sliding bearing), have a lot of good characteristics, as high rotating speed, highi degree of accuracy, low power consumption, pollution-free and advantage such as the life-span is long, environmental suitability is strong.Therefore be widely used in industries such as national defence, the energy, lathe and medical treatment, especially obvious superiority more arranged at high speed rotary machinery and ultraprecise Instrument technology field.
At present, kinetic pressure air-float bearing of inner is lubricated to mainly contain two kinds of structural types the most basic, and a kind of is the axial flow slot type, as shown in Figure 1, be existing axial flow slot type kinetic pressure air-float bearing of inner sectional view, among the figure, rotor journal 1, bearing support 2, the supercharging flow path groove 3 of rotor journal 1 outer round surface, elastic ring 4.Another kind is the elastic foil chip, as shown in Figure 2, among the figure, rotor journal 1, bearing support 2, elastic wear-resisting paillon foil 3.
Axial flow slot type kinetic pressure air-float bearing of inner is to be processed into the air-flow conduit in journal surface, and dynamic and static gaps becomes the surface that relatively moves of wedge-like to diminish gradually along the movement direction gap, utilize the viscous effect of gas, make axle suspension float at the wedge-shaped surface traction generation pressure that relatively moves and (see [Soviet Union] B.H De Luozhidaoweiqi work, Zheng Lizhu translates, " kinetic pressure air-float bearing of inner ", National Defense Industry Press, 1982); Paillon foil formula kinetic pressure air-float bearing of inner then is the bearing according to gas bullet structure coupling principle design, utilize the coupling of sound mixed pressure air film and paillon foil elastic force to make axle suspension float (pond work green for a long time, " fluid mechanics is lubricated ", National Defense Industry Press, 1998).The advantage of these two kinds of air-bearings is simple in structure, is convenient to safeguard, uses also very effective in many cases.But these two kinds of air-bearings are because the characteristics of structure, all exist the short time such as start and stop to surface of contact wear-resisting property requirement height, especially be processed into the axial flow slot type kinetic pressure air-float bearing of inner of air-flow conduit in journal surface, the rough easier generation sound parts of journal surface collide, abrasion, cause the fault of bearing.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, propose a kind of kinetic pressure air-float bearing of inner of flow passage self-lubricating structure.
For achieving the above object, technical solution of the present invention is: a kind of kinetic pressure air-float bearing of inner of flow passage self-lubricating structure comprises rotor journal, bearing support, supercharging flow path groove, elastic ring; Its rotor journal smooth surface is provided with helical supercharging flow path groove on the bearing support internal surface.
Described kinetic pressure air-float bearing of inner, its described bearing support adopts carbon graphite alloy, carbon fiber, one of them material of boron nitride.
Described kinetic pressure air-float bearing of inner, its described supercharging flow path groove becomes the Eight characters evenly distributed at the bearing support internal circular surfaces, and supercharging flow path groove the inner is sealed, each other a distance is arranged, and the outer end is open to the bearing support edge.
Described kinetic pressure air-float bearing of inner, its described elastic ring is rubber ring, metal-rubber, one of them making of elastic composite.
Described kinetic pressure air-float bearing of inner, its described bearing support and elastic ring are hydrodynamic bearing sealing ring structure.
Bearing of the present invention has not only greatly improved the wear-resisting property of short time such as start and stop to contact surface, but also reduced the requirement of indexs such as, temperature impure to working medium, can effectively improve the stability and the reliability of air-bearing carrying, further widen the scope that air-bearing is used.
Description of drawings
Fig. 1 is existing axial flow slot type kinetic pressure air-float bearing of inner schematic representation;
Fig. 2 is existing paillon foil formula kinetic pressure air-float bearing of inner schematic representation;
Fig. 3 is the kinetic pressure air-float bearing of inner schematic representation of internal spiral formula runner self-lubricating structure of the present invention; Wherein: Fig. 3 A is a kinetic pressure air-float bearing of inner sectional drawing of the present invention; Fig. 3 B launches schematic representation for kinetic pressure air-float bearing of inner of the present invention holds the body internal surface;
Fig. 4 is that kinetic pressure air-float bearing of inner of the present invention bumps the experiment test figure as a result that rubs.
Embodiment
Seeing Fig. 3, is the kinetic pressure air-float bearing of inner schematic representation of flow passage self-lubricating structure of the present invention.Fig. 3 A is a kinetic pressure air-float bearing of inner generalized section of the present invention, and Fig. 3 B launches schematic representation for kinetic pressure air-float bearing of inner bearing support internal surface of the present invention.Among the figure, rotor journal 1, bearing support 2, supercharging flow path groove 3, elastic ring 4.Rotor journal 1 smooth surface is provided with helical supercharging flow path groove 3 on bearing support 2 internal surfaces, supercharging flow path groove 3 the inners are sealed, had a distance, outer end to be open to bearing support 2 edges each other.
Core technology of the present invention is to offer supercharging flow path groove structure at bearing inner surface, and adopts the material (as materials such as carbon graphite alloy, carbon fiber, boron nitride) of wear-resisting, high temperature resistant, high strength and self-lubricating solid performance.Its principle is to utilize the viscous effect of gas, and at runner place, axle journal rotating dynamic and static gap, gas produces kinetic pressure makes its axle suspension float.Here offering the supercharging flow path groove at the air-bearing internal surface, then is to utilize the take offence effect of body supercharging of axle journal rotating band, for floating of rotor provides dynamic pressure carrying effect; Application conditions at air-bearing, choose reasonable is wear-resisting, the self lubricating material of resistance to high temperature is as the air-bearing inner surface material, strengthened the adaptive capacity of sound parts contact surface friction, solved axle journal airslide sound parts short-time contact effectively, the abrasion problem of the relative high-speed motion of bearing inner surface; Adopt damping technology measures such as elastic caoutchouc circle, metal-rubber and elastic composite, also further improved the stability of its air-bearing operation.
The present invention realizes as follows:
1. the selection of bearing support material, i.e. conditions of using according to air-bearing such as temperature, pressure and working medium, choose reasonable is wear-resisting, high temperature resistant, the material of high strength level self-lubricating solid performance is as air-bearing and inner surface material;
2. bearing inner surface is offered the structural design of supercharging flow path groove, i.e. the speed conditions of the load of bearing according to air-bearing, axle journal rotation and whirling motion is rationally determined the pressure ratio of supercharging flow path groove, finishes the structural design that internal surface is offered the supercharging flow path groove;
3. the structural design of bearing, promptly conditions such as the requirement of the load character of bearing according to air-bearing, stability and working medium adopt measures such as rubber ring, metal-rubber and elastic composite, finish the design of air-bearing structure, intensity and stability of motions;
4. the processing of bearing and manufacturing, promptly according to the technological requirement of the structural design of air-bearing, selection can be satisfied the equipment of required precision and make, processes and assemble.
Embodiment
1. the selection of bearing support material: according to air-bearing application of temperature T〉400 ℃, working medium are the operating conditions of the air under the external pressure, the carbon graphite alloy of selecting to have wear-resisting, high temperature resistant, high strength and self-lubricating solid performance is as air-bearing body and inner surface material;
2. bearing inner surface is offered the structural design of supercharging flow path groove: the static load of bearing according to air-bearing is that 3 kilograms, working rotor rotating speed are 40000rpm, determines internal spiral formula supercharging runner flute profile line, finishes the structural design that internal surface is offered the supercharging flow path groove;
3. the structural design of bearing body: the load character of bearing according to air-bearing, the requirement of stability, adopt the measure of elastic caoutchouc circle damping technology, finish the design of air-bearing structure, intensity and stability of motions;
4. the processing of bearing and manufacturing: according to the technological requirement of the structural design of air-bearing, selection can be satisfied the numerical control device or the special device of required precision and make, processes and assemble.
5. kinetic pressure air-float bearing of inner bumps the experiment test result that rubs:
Fig. 4 is that kinetic pressure air-float bearing of inner bumps the result that the experiment that rubs detects, i.e. vibration amplitude-time-frequency three-dimensional spectrum.Abscissa is the speed of rotor, and y coordinate is working time, and the color depth of chromatogram is represented the amplitude size, and the bright more expression amplitude of color is big more.Whole experiment, axle journal are bumped in D, E zone generation short-time contact and are rubbed, and produce high and low frequency spectrum structure, are respectively (F, G) and (B, C) zone.By Fig. 4 as seen, the vibration of start and stop stage is very little, and in bumping of D, E rubbed the zone, it is very short to bump the time of rubbing, and amplitude illustrates the helical groove structure design of the dry friction lubrication property and the bearing inner surface of bearing material also less than specified value, reduced the effect of rubbing of bumping of shutdown process, simultaneously higher rotation speed bump rub in, also can keep good friction, lubrication characteristic, alleviated and bumped the influence that rubs and move for system.
Claims (5)
1, a kind of kinetic pressure air-float bearing of inner of flow passage self-lubricating structure comprises rotor journal, bearing support, supercharging flow path groove, elastic ring; It is characterized in that: the rotor journal smooth surface is provided with helical supercharging flow path groove on the bearing support internal surface.
2, kinetic pressure air-float bearing of inner as claimed in claim 1 is characterized in that: described bearing support, adopt carbon graphite alloy, carbon fiber, one of them material of boron nitride.
3, kinetic pressure air-float bearing of inner as claimed in claim 1 is characterized in that: described supercharging flow path groove, and become the Eight characters evenly distributed at the bearing support internal circular surfaces, supercharging flow path groove the inner is sealed, each other a distance is arranged, and the outer end is open to the bearing support edge.
4, kinetic pressure air-float bearing of inner as claimed in claim 1 is characterized in that: described elastic ring is rubber ring, metal-rubber, one of them making of elastic composite.
5, kinetic pressure air-float bearing of inner as claimed in claim 1 is characterized in that: described bearing support and elastic ring are hydrodynamic bearing sealing ring structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101639949A CN101413540A (en) | 2007-10-15 | 2007-10-15 | Kinetic pressure air-float bearing of inner flow passage self-lubricating structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101639949A CN101413540A (en) | 2007-10-15 | 2007-10-15 | Kinetic pressure air-float bearing of inner flow passage self-lubricating structure |
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| CN101413540A true CN101413540A (en) | 2009-04-22 |
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| CNA2007101639949A Pending CN101413540A (en) | 2007-10-15 | 2007-10-15 | Kinetic pressure air-float bearing of inner flow passage self-lubricating structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813129A (en) * | 2010-05-07 | 2010-08-25 | 浙江工业大学 | Three-dimensional air-floation follow-up device |
| CN101691879B (en) * | 2009-10-09 | 2011-02-02 | 大连理工大学 | Dynamic and static pressure composite gas bearing with internal pi shaped air wedge groove |
| CN102278366A (en) * | 2011-05-27 | 2011-12-14 | 罗立峰 | Self-sealing dynamic-pressure gas radial ceramic bearing |
| CN102954111A (en) * | 2012-06-13 | 2013-03-06 | 沈阳理工大学 | Surface structure of radial sliding bearing with lubricating oil points in phyllotaxy arrangement |
| CN109854619A (en) * | 2019-01-07 | 2019-06-07 | 江苏联动轴承股份有限公司 | A kind of inclination bearing assembly |
| CN114635920A (en) * | 2020-12-15 | 2022-06-17 | 中国科学院宁波材料技术与工程研究所 | Suspension bearing, control method and application thereof |
| CN115853893A (en) * | 2022-12-21 | 2023-03-28 | 中车株洲电机有限公司 | Air bearing |
-
2007
- 2007-10-15 CN CNA2007101639949A patent/CN101413540A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691879B (en) * | 2009-10-09 | 2011-02-02 | 大连理工大学 | Dynamic and static pressure composite gas bearing with internal pi shaped air wedge groove |
| CN101813129A (en) * | 2010-05-07 | 2010-08-25 | 浙江工业大学 | Three-dimensional air-floation follow-up device |
| CN101813129B (en) * | 2010-05-07 | 2011-12-28 | 浙江工业大学 | Three-dimensional air-floation follow-up device |
| CN102278366A (en) * | 2011-05-27 | 2011-12-14 | 罗立峰 | Self-sealing dynamic-pressure gas radial ceramic bearing |
| CN102954111A (en) * | 2012-06-13 | 2013-03-06 | 沈阳理工大学 | Surface structure of radial sliding bearing with lubricating oil points in phyllotaxy arrangement |
| CN102954111B (en) * | 2012-06-13 | 2015-04-22 | 沈阳理工大学 | Surface structure of radial sliding bearing with lubricating oil points in phyllotaxy arrangement |
| CN109854619A (en) * | 2019-01-07 | 2019-06-07 | 江苏联动轴承股份有限公司 | A kind of inclination bearing assembly |
| CN114635920A (en) * | 2020-12-15 | 2022-06-17 | 中国科学院宁波材料技术与工程研究所 | Suspension bearing, control method and application thereof |
| CN115853893A (en) * | 2022-12-21 | 2023-03-28 | 中车株洲电机有限公司 | Air bearing |
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Open date: 20090422 |