CN201106631Y - Dynamical pressure air bearing of interval channel self-lubricating structure - Google Patents
Dynamical pressure air bearing of interval channel self-lubricating structure Download PDFInfo
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- CN201106631Y CN201106631Y CNU2007201778294U CN200720177829U CN201106631Y CN 201106631 Y CN201106631 Y CN 201106631Y CN U2007201778294 U CNU2007201778294 U CN U2007201778294U CN 200720177829 U CN200720177829 U CN 200720177829U CN 201106631 Y CN201106631 Y CN 201106631Y
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- bearing
- pressure air
- float
- kinetic pressure
- flow path
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Abstract
The utility model discloses a dynamic pressure air bearing with a self lubricating structure of an inner flow passage, and relates to a bearing technology, the surface of the neck journal of a rotor is smooth, and the inner surface of the bearing body is provided with a c-shaped structure; the inner surface of the bearing body adopts material with the performance of abrasion resistance, stand fire, high strength and solid self lubrication; a structural design with a rubber ring, metal rubber and composite material vibration damping measure is adopted. The bearing of the utility model not only greatly improves the abrasion resistant performance for the contact surface by short time such as starting, stopping, etc., but also reduces the requirements for the index such as working substance containing impurities, temperature, etc., can effectively improve the carrying stability and reliability of the air bearing, and further expand the range of application of the air bearing.
Description
Technical field
The utility model relates to technical field of bearings, is 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.
The model utility content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, proposes 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 utility model 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, supercharging flow path groove the inner is sealed, each other a distance arranged, and the outer end is open to the bearing support edge.
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.
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 utility model 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 utility model; Wherein: Fig. 3 A is the utility model kinetic pressure air-float bearing of inner sectional drawing; Fig. 3 B launches schematic representation for the utility model kinetic pressure air-float bearing of inner holds the body internal surface.
Embodiment
Seeing Fig. 3, is the kinetic pressure air-float bearing of inner schematic representation of flow passage self-lubricating structure of the present utility model, and Fig. 3 A is the utility model kinetic pressure air-float bearing of inner generalized section, and Fig. 3 B is that the utility model kinetic pressure air-float bearing of inner bearing support internal surface launches schematic representation.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 utility model 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 utility model is realized 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 is the operating conditions of the air under the external pressure, and 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:
The utility model bumps the result that the experiment that rubs detects, i.e. vibration amplitude-T/F three-dimensional spectrum by kinetic pressure air-float bearing of inner.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 experiment as can be known, the vibration of start and stop stage is very little, and bump in the zone of rubbing at D, E, 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. the kinetic pressure air-float bearing of inner of a 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, helical supercharging flow path groove is set on the bearing support internal surface, 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.
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 becomes the Eight characters evenly distributed at the bearing support internal circular surfaces.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201778294U CN201106631Y (en) | 2007-10-15 | 2007-10-15 | Dynamical pressure air bearing of interval channel self-lubricating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201778294U CN201106631Y (en) | 2007-10-15 | 2007-10-15 | Dynamical pressure air bearing of interval channel self-lubricating structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201106631Y true CN201106631Y (en) | 2008-08-27 |
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ID=39958432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201778294U Expired - Lifetime CN201106631Y (en) | 2007-10-15 | 2007-10-15 | Dynamical pressure air bearing of interval channel self-lubricating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201106631Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195808A (en) * | 2013-04-22 | 2013-07-10 | 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 and design method |
| CN105202014A (en) * | 2015-05-19 | 2015-12-30 | 罗立峰 | Slot type dynamic pressure gas radial bearing |
-
2007
- 2007-10-15 CN CNU2007201778294U patent/CN201106631Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195808A (en) * | 2013-04-22 | 2013-07-10 | 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 and design method |
| CN103195808B (en) * | 2013-04-22 | 2016-08-03 | 哈尔滨耦合动力工程技术中心有限公司 | Pantograph structure molded line kinetic pressure air-float bearing of inner and method for designing |
| CN105202014A (en) * | 2015-05-19 | 2015-12-30 | 罗立峰 | Slot type dynamic pressure gas radial bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080827 |
|
| CX01 | Expiry of patent term |