CN201093013Y - Internal groove self-lubricating movable static pressure coupled air bearing - Google Patents
Internal groove self-lubricating movable static pressure coupled air bearing Download PDFInfo
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- CN201093013Y CN201093013Y CNU2007201778307U CN200720177830U CN201093013Y CN 201093013 Y CN201093013 Y CN 201093013Y CN U2007201778307 U CNU2007201778307 U CN U2007201778307U CN 200720177830 U CN200720177830 U CN 200720177830U CN 201093013 Y CN201093013 Y CN 201093013Y
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Abstract
The utility model relates to an inner channel flow self-lubricating dynamic static pressure coupling gas floating bearing, which relates to the bearing technique and is a gas floating bearing of a novel structural form. The structural characteristic is that double-row pressure air supply hole is opened on a bearing body, and a nozzle throttle tangential direct gas supply structure is adopted, a supercharging conduit groove structure is opened on the inner surface of a bearing, the bearing body adopts material which has wear-resisting, thermostable and self-lubricating property, and adopts vibration-damping technical measure such as rubber rings, metal rubbers, elastic composite material and the like. The dynamic static pressure coupling gas floating bearing of the utility model not only greatly increases the ability of the floating ring bears external load and abradability of dynamic static components for short time contact, but also reduces index requirement for impurity which is contained in working medium, temperature and the like. Therefore, the gas floating bearing has simple structure, stable operation and high reliability, and further widens application range for gas floating bearing product engineer.
Description
Technical field
The utility model relates to bearing technology, is a kind of internal groove self-lubricating dynamic-static pressure coupling air-float bearing of high-speed rotating machine air-bearing.
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, air-bearing is lubricated to mainly contain two kinds of structural types the most basic, and a kind of is static-pressure air bearing such as Fig. 1, and another kind is kinetic pressure air-float bearing of inner such as Fig. 2.
No matter be static-pressure air bearing, or kinetic pressure air-float bearing of inner, its principle all is to rely on gas, bearing is exactly a viscosity of utilizing gas, improve the pressure of gas in the gap, thus with axle suspension float the bearing that comes (see and [day] ten close Jin Yizhu, design that Han Huanchen translates " pneumatic bearing----, make and application ", the Yuhang Publishing House, 1988).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 all there is sound parts short-time contact face wear-resisting property requirement height in these two kinds of air-bearings because structure, and material and technology capability such as are not easy to reach at shortcoming, and the fault that the whirling motion unstability is damaged bearing easily takes place.
The model utility content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, proposes a kind of air-bearing of internal groove self-lubricating dynamic-static pressure coupled structure of new structure form, realizes the air-bearing of active and static pressure coupling carrying.
For achieving the above object, technical solution of the present utility model is:
A kind of internal groove self-lubricating dynamic-static pressure coupling air-float bearing, the bearing top circle two ends are provided with the damping elastomer circle; It comprises static-pressure system, dynamic pressure system, wherein,
Static-pressure system is the double forced air supply hole that perforation is set at bearing support, and the interior circle of the nozzle of air vent and bearing is oriented in a tangential direction crossing, and nozzle evenly distributes at the bearing support internal circular surfaces;
The dynamic pressure system is provided with the supercharging flow path groove at the bearing support internal circular surfaces, and the groove that the supercharging flow path groove seals around being becomes the Eight characters to arrange, and its inner has a distance each other, and also there is a distance at outer end and bearing support edge.
Described air-bearing, its described bearing support is to adopt carbon graphite alloy, carbon fiber, one of them material of teflon.
Described air-bearing, its described damping elastomer circle is rubber ring, metal-rubber, one of them making of elastic composite.
Described air-bearing, its described bearing support and damping elastomer circle are hydrodynamic bearing sealing ring structure.
The utility model bearing has not only greatly improved sound parts short-time contact face wear-resisting property, 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 static-pressure air bearing structural representation;
Fig. 2 is existing kinetic pressure air-float bearing of inner structural representation;
Fig. 3 is an internal groove self-lubricating dynamic-static pressure coupling air-float bearing structural representation of the present utility model;
Fig. 4 is a double floating ring forced air supply hole structure schematic representation of the present utility model;
Fig. 5 is the tangential gas-supplying structure schematic representation of nozzle throttling of the present utility model.
Embodiment
Fig. 3 is an internal groove self-lubricating dynamic-static pressure coupling air-float bearing structural representation of the present utility model, and wherein, Fig. 3 A is the dynamic-static pressure coupling air-float bearing generalized section, and Fig. 3 B is a dynamic-static pressure coupling air-float bearing inner headed face schematic representation.As shown in the figure, internal groove self-lubricating dynamic-static pressure coupling air-float bearing of the present utility model is made up of rotor journal 1, bearing support 2, supercharging flow path groove 3, damping elastomer circle 4, air vent 5, air vent nozzle 6, and it comprises static-pressure system, dynamic pressure system; Wherein,
Static-pressure system is the double forced air supply hole 5 that perforation is set at bearing support 2, and the interior circle of the nozzle 6 of air vent 5 and bearing is oriented in a tangential direction crossing, and air vent nozzle 6 evenly distributes at bearing support 2 internal circular surfaces;
The dynamic pressure system evenly is provided with supercharging flow path groove 3 at bearing support 2 internal circular surfaces, and the groove that supercharging flow path groove 3 seals around being becomes the Eight characters to arrange, and its inner has a distance each other, and also there is a distance at outer end and bearing support 2 edges.
See also Fig. 4, Fig. 5 simultaneously, core technology of the present utility model is to offer double forced air supply hole 5 in the air-bearing body, and every row pressure power air vent 5 adopts the tangential gas-supplying structure of nozzle 6 throttlings; The air-bearing internal surface is offered supercharging flow path groove 3, 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 the structural feature according to air-bearing and rotor journal 1 sound parts, and at dynamic and static gaps runner place, the power that utilizes rotor journal 1 rotation to drive fluid pressurized and outside supply gas pressure coupling generation makes axle suspension float.Here offer double forced air supply hole 5 at bearing support 2, and adopt the tangential gas-supplying structure of nozzle 6 throttlings, provide static pressure carrying and damping function floating of rotor; The floating ring internal surface is offered supercharging flow path groove 3, then is to utilize the take offence effect of body supercharging of rotor journal 1 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 air-bearing internal surface self-lubricating layer 7 materials, solved axle journal airslide sound parts short-time contact effectively, the abrasion problem of the relative high-speed motion of bearing inner surface; Damping elastomer circle 4 adopts damping technology measures such as elastic caoutchouc circle, metal-rubber and elastic composite, further improves the stability of air-bearing carrying operation.
The technical solution of the utility model mainly realizes as follows:
1. the selection of air-bearing body 2 materials, 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 fluid active and static pressure structural design of air-bearing, i.e. conditions of using according to air-bearing such as temperature, pressure and working medium, and axle journal rotation, whirling motion rotating speed with bear load character, rationally determine the pressure ratio of supercharging flow path groove 3, finish the structural design that tangential air vent 5 of double nozzle 6 throttlings and internal surface are offered supercharging flow path groove 3;
3. the 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. the processing of air-bearing and manufacturing, promptly 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
1. the selection of air-bearing body 2: according to air-bearing application of temperature T＜200 ℃, working medium is the air under the external pressure, selects to have wear-resisting, the high temperature resistant carbon graphite of greasy property of sending from as air-bearing body 2 materials.
2. the active and static pressure structural design of pneumatic bearing: the static load of bearing according to air-bearing is that 3 kilograms, working rotor rotating speed are 38000rpm, determines that tangential air vent 5 of double nozzle 6 throttlings and internal surface offer the structural design of splayed shape supercharging flow path groove 3.
3. pneumatic bearing main body structure design: the load character of being born according to the hydrodynamic seal ring, the requirement of stability, adopting the elastic caoutchouc circle is damping elastomer circle 4, finishes the design of hydrodynamic bearing sealing ring structure, intensity and stability of motions;
4. the processing of pneumatic bearing and manufacturing: according to the technological requirement of the structural design of hydrodynamic seal ring, selection can be satisfied the numerical control device or the special device of required precision and make, processes and assemble.
Claims (5)
1. internal groove self-lubricating dynamic-static pressure coupling air-float bearing, the bearing top circle two ends are provided with the damping elastomer circle; It is characterized in that: comprise static-pressure system, dynamic pressure system, wherein,
Static-pressure system is the double forced air supply hole that perforation is set at bearing support, and the interior circle of the nozzle of air vent and bearing is oriented in a tangential direction crossing, and nozzle evenly distributes at the bearing support internal circular surfaces;
The dynamic pressure system is provided with the supercharging flow path groove at the bearing support internal circular surfaces, the groove that the supercharging flow path groove seals around being, and its inner has a distance each other, and also there is a distance at outer end and bearing support edge.
2. air-bearing as claimed in claim 1 is characterized in that: described bearing support is to adopt carbon graphite alloy, carbon fiber, one of them material of teflon.
3. air-bearing as claimed in claim 1 is characterized in that: described damping elastomer circle is rubber ring, metal-rubber, one of them making of elastic composite.
4. air-bearing as claimed in claim 1 is characterized in that: described bearing support and damping elastomer circle are hydrodynamic bearing sealing ring structure.
5. air-bearing as claimed in claim 1 is characterized in that: described supercharging flow path groove becomes the Eight characters to arrange at the bearing support internal circular surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201778307U CN201093013Y (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating movable static pressure coupled air bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201778307U CN201093013Y (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating movable static pressure coupled air bearing |
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| Publication Number | Publication Date |
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| CN201093013Y true CN201093013Y (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201778307U Expired - Lifetime CN201093013Y (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating movable static pressure coupled air bearing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011800A (en) * | 2010-05-26 | 2011-04-13 | 广州中国科学院工业技术研究院 | Passive static pressure high-speed main shaft support structure and operation method thereof |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
| CN102221025A (en) * | 2011-07-18 | 2011-10-19 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN102410307A (en) * | 2011-11-21 | 2012-04-11 | 苏州吉矽精密科技有限公司 | Air main shaft bearing with antifriction sleeve structure |
| CN103322067A (en) * | 2013-06-21 | 2013-09-25 | 东南大学 | Conical dynamic pressure spiral groove bearing containing self-lubricating material |
| TWI447314B (en) * | 2011-11-22 | 2014-08-01 | Dar Harnq Industry Co Ltd | Bushing air bearing and spindle device |
| CN106812798A (en) * | 2017-04-17 | 2017-06-09 | 南方科技大学 | A kind of bearing and its manufacture method |
| CN110645271A (en) * | 2019-09-19 | 2020-01-03 | 上海卫星工程研究所 | Damping vibration absorption aerostatic bearing |
-
2007
- 2007-10-15 CN CNU2007201778307U patent/CN201093013Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011800A (en) * | 2010-05-26 | 2011-04-13 | 广州中国科学院工业技术研究院 | Passive static pressure high-speed main shaft support structure and operation method thereof |
| CN102011800B (en) * | 2010-05-26 | 2012-07-04 | 广州中国科学院工业技术研究院 | Passive static pressure high-speed main shaft support structure and operation method thereof |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
| CN102221025A (en) * | 2011-07-18 | 2011-10-19 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN102221025B (en) * | 2011-07-18 | 2013-11-13 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN102410307A (en) * | 2011-11-21 | 2012-04-11 | 苏州吉矽精密科技有限公司 | Air main shaft bearing with antifriction sleeve structure |
| TWI447314B (en) * | 2011-11-22 | 2014-08-01 | Dar Harnq Industry Co Ltd | Bushing air bearing and spindle device |
| CN103322067A (en) * | 2013-06-21 | 2013-09-25 | 东南大学 | Conical dynamic pressure spiral groove bearing containing self-lubricating material |
| CN106812798A (en) * | 2017-04-17 | 2017-06-09 | 南方科技大学 | A kind of bearing and its manufacture method |
| CN110645271A (en) * | 2019-09-19 | 2020-01-03 | 上海卫星工程研究所 | Damping vibration absorption aerostatic bearing |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080730 |