CN101413541A - Internal groove self-lubricating dynamic-static pressure coupling air-float bearing - Google Patents
Internal groove self-lubricating dynamic-static pressure coupling air-float bearing Download PDFInfo
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- CN101413541A CN101413541A CNA2007101639953A CN200710163995A CN101413541A CN 101413541 A CN101413541 A CN 101413541A CN A2007101639953 A CNA2007101639953 A CN A2007101639953A CN 200710163995 A CN200710163995 A CN 200710163995A CN 101413541 A CN101413541 A CN 101413541A
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- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 229920001967 Metal rubber Polymers 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000007667 floating Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 238000013461 design Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Abstract
The invention discloses a coupling dynamic-static air bearing with a self-lubricating function of an internal channel, and relates to bearing technologies, and is an air bearing of new structural form. The bearing is structurally characterized in that a bearing body is provided with double-row pressure air supply holes, and a throttle nozzle tangential air supply structure is adopted; inner surface of the bearing is provided with a pressure channel groove structure; the bearing body is made of wear resistant and high temperature resistant materials with self-lubricating property, and technical measures for vibration reduction such as rubber band, metal rubber and elastic composite materials are taken. The coupling dynamic-static air bearing greatly increases the capacity of a floating ring for bearing imposed load and the wear resistant property of static components and dynamic components which contact in a short time, and also reduces the requirements for indexes such as working substances, impurities, temperature and the like. Therefore, the bearing is characterized by simple structure, stable operation and high reliability, and further broadens the technical application range of air bearing products.
Description
Technical Field
The invention relates to a bearing technology, in particular to an internal channel self-lubricating dynamic and static pressure coupling air bearing of a high-speed rotating mechanical air bearing.
Background
The air bearing is a high and new technology product which is rapidly developed in the middle of the 20 th century, and compared with a conventional oil lubrication bearing (a rolling bearing or an oil sliding bearing), the air bearing has the advantages of high rotating speed, high precision, low power consumption, no pollution, long service life, strong environmental adaptability and the like. Therefore, the device is widely applied to industries such as national defense, energy, machine tools, medical treatment and the like, and particularly has obvious superiority in the technical field of high-speed rotary machinery and ultra-precise instruments.
At present, the lubrication of the air bearing mainly has two basic structural forms, namely a static pressure air bearing shown in a figure 1 and a dynamic pressure air bearing shown in a figure 2.
The principle of the static pressure air bearing or the dynamic pressure air bearing depends on gas, and the bearing utilizes the viscosity of the gas to improve the pressure of the gas in a gap so as to suspend a shaft (see Ri Ten writings of jin and Huachen translation of pneumatic bearing- -design, manufacture and application, aerospace Press, 1988). The two types of air bearings have the advantages of simple structure, convenient maintenance and effective application in many cases. However, due to the structural characteristics of the two types of air bearings, the requirements on the wear resistance of the contact surface of the moving part and the static part in a short time are high, the material and the process performance are not easy to reach the grade, and the bearing is easy to be damaged by vortex instability.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an air bearing with an internal channel self-lubricating dynamic and static pressure coupling structure in a new structural form, so as to realize the air bearing for dynamic and static pressure coupling bearing.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an internal channel self-lubricating dynamic and static pressure coupling air bearing is provided, wherein two ends of the excircle of the bearing are provided with vibration damping elastic rings; the device comprises a static pressure system and a dynamic pressure system;
the static pressure system is characterized in that a bearing body is provided with two rows of pressure air supply holes which are communicated;
the dynamic pressure system is that the inner circle surface of the bearing body is provided with a pressurizing runner groove, and the inner ends of the pressurizing runner groove are spaced from each other.
The air supply hole of the air bearing is provided with an air saving nozzle which is intersected with the inner circle of the bearing body in the tangential direction and is uniformly distributed on the surface of the inner circle of the bearing body; the pressurizing runner groove is a groove with the periphery closed, and the outer end of the pressurizing runner groove is also away from the edge of the bearing body.
The bearing body of the air bearing is made of one of carbon graphite alloy, carbon fiber and polytetrafluoroethylene.
The vibration-damping elastic ring of the air bearing is made of one of a rubber ring, metal rubber and an elastic composite material.
The bearing body and the vibration reduction elastic ring of the air bearing are of a fluid dynamic pressure bearing sealing ring structure.
The pressurizing runner grooves of the air bearing are arranged in a splayed shape on the inner circular surface of the bearing body.
The bearing of the invention not only greatly improves the wear resistance of the short-time contact surface of the movable and static parts, but also reduces the requirements on indexes such as impurity content, temperature and the like of working media, can effectively improve the bearing stability and reliability of the air bearing, and further widens the application range of the air bearing.
Drawings
FIG. 1 is a schematic view of a conventional static pressure air bearing;
FIG. 2 is a schematic view of a conventional hydrodynamic gas bearing;
FIG. 3 is a schematic structural view of an internal channel self-lubricating dynamic-static pressure coupling air bearing of the present invention;
FIG. 4 is a schematic view of the double row floating ring pressure feed hole configuration of the present invention;
fig. 5 is a schematic view of the nozzle throttling tangential air supply configuration of the present invention.
Detailed Description
Fig. 3 is a schematic structural view of the internal channel self-lubricating dynamic-static pressure coupling air bearing of the present invention, wherein fig. 3A is a schematic sectional view of the dynamic-static pressure coupling air bearing, and fig. 3B is a schematic internal circular surface view of the dynamic-static pressure coupling air bearing. As shown in the figure, the internal channel self-lubricating dynamic-static pressure coupling air bearing comprises a rotor journal 1, a bearing body 2, a pressurizing runner groove 3, a vibration-damping elastic ring 4, an air supply hole 5 and an air supply hole nozzle 6, and comprises a static pressure system and a dynamic pressure system; wherein,
the static pressure system is characterized in that a bearing body 2 is provided with two rows of penetrating pressure air supply holes 5, nozzles 6 of the air supply holes 5 are intersected with the inner circle of the bearing in the tangential direction, and the air supply hole nozzles 6 are uniformly distributed on the surface of the inner circle of the bearing body 2;
the dynamic pressure system is that the inner circle surface of the bearing body 2 is evenly provided with the pressurizing runner groove 3, the pressurizing runner groove 3 is a groove with the periphery closed and is arranged in a splayed shape, the inner ends of the pressurizing runner groove 3 are mutually spaced, and the outer end of the pressurizing runner groove is also spaced from the edge of the bearing body 2.
The bearing body 2 is a fluid dynamic pressure bearing seal ring, and is made of materials with wear resistance, high temperature resistance and self-lubricating property, such as carbon graphite alloy, carbon fiber, polytetrafluoroethylene and the like.
The two ends of the excircle of the bearing body 2 are provided with vibration damping elastic rings 4, and the vibration damping elastic rings 4 are made of rubber rings, metal rubber and elastic composite materials.
Referring to fig. 4 and 5, the core technology of the present invention is to arrange two rows of pressure air supply holes 5 in the air bearing body, wherein each row of pressure air supply holes 5 adopts a nozzle 6 throttling tangential air supply structure; the inner surface of the air bearing is provided with a pressurizing runner groove 3 and is made of materials (such as carbon graphite alloy, carbon fiber, boron nitride and the like) with wear resistance, high temperature resistance, high strength and solid self-lubricating property. The principle is that according to the structural characteristics of an air bearing and a rotor journal 1 dynamic and static part, a shaft is suspended at a dynamic and static clearance flow passage by utilizing the power generated by the coupling effect of the pressurization of fluid driven by the rotation of the rotor journal 1 and the external air supply pressure. The bearing body 2 is provided with double rows of pressure air supply holes 5, and a nozzle 6 throttling tangential air supply structure is adopted, so that static pressure bearing and damping effects are provided for the floating of the rotor; the inner surface of the floating ring is provided with a pressurizing runner groove 3, so that the effect of pressurizing gas by utilizing the rotation of the rotor shaft neck 1 is utilized, and a dynamic pressure bearing effect is provided for the floating of the rotor; aiming at the application conditions of the air bearing, a self-lubricating material with wear resistance and high temperature resistance is reasonably selected as a material of a self-lubricating layer 7 on the inner surface of the air bearing, so that the problem of abrasion caused by the short-time contact of the dynamic and static parts of the journal airflow groove and the relative high-speed movement of the inner surface of the bearing is effectively solved; the vibration reduction elastic ring 4 adopts vibration reduction technical measures such as an elastic rubber ring, metal rubber and an elastic composite material, and the stability of the bearing operation of the air bearing is further improved.
The technical scheme of the invention is mainly realized by the following steps:
1. selecting the material of the air bearing body 2, namely reasonably selecting a wear-resistant, high-temperature-resistant and self-lubricating performance material as the material of the air bearing body according to the conditions of temperature, pressure, working medium and the like applied to the air bearing;
2. the fluid dynamic and static pressure structural design of the air bearing is that the pressure ratio of the pressurizing flow channel groove 3 is reasonably determined according to the conditions of temperature, pressure, working medium and the like applied to the air bearing, the rotation speed of a shaft neck, the whirling rotation speed and the load bearing property, and the structural design that the double-row nozzle 6 throttles the tangential air supply hole 5 and the pressurizing flow channel groove 3 is arranged on the inner surface is completed;
3. the design of the body structure of the air bearing is that measures such as a rubber ring, metal rubber and an elastic composite material are adopted according to the requirements of load property and stability borne by the air bearing and conditions such as working media, and the design of the hydrodynamic bearing sealing ring structure, strength and motion stability is completed;
4. and (3) machining and manufacturing the air bearing, namely selecting equipment capable of meeting the precision requirement for manufacturing, machining and assembling according to the process requirement of the structural design of the air bearing.
Examples
1. Selection of the air bearing body 2: according to the condition that the application temperature T of the air bearing is less than 200 ℃ and the working medium is air under the environmental pressure, carbon graphite with wear-resisting, high-temperature-resisting and self-lubricating properties is selected as the material of the air bearing body 2.
2. The dynamic and static pressure structure design of the pneumatic bearing: according to the static load born by the air bearing of 3 kilograms and the working rotating speed of the rotor of 38000rpm, the structural design that the throttling tangential air supply holes 5 of the double-row nozzles 6 and the inner surface are provided with the splayed pressurizing runner grooves 3 is determined.
3. The structural design of the pneumatic bearing body is as follows: according to the requirements of the load property and stability borne by the hydrodynamic sealing ring, the elastic rubber ring is adopted as the vibration reduction elastic ring 4, and the design of the hydrodynamic bearing sealing ring structure, the strength and the motion stability is completed;
4. processing and manufacturing of the pneumatic bearing: according to the technological requirements of the structural design of the hydrodynamic sealing ring, numerical control equipment or special equipment capable of meeting the precision requirements is selected for manufacturing, processing and assembling.
Claims (6)
1. An internal channel self-lubricating dynamic and static pressure coupling air bearing is provided, wherein two ends of the excircle of the bearing are provided with vibration damping elastic rings; the method is characterized in that: comprises a static pressure system and a dynamic pressure system;
the static pressure system is characterized in that a bearing body is provided with two rows of pressure air supply holes which are communicated;
the dynamic pressure system is that the inner circle surface of the bearing body is provided with a pressurizing runner groove, and the inner ends of the pressurizing runner groove are spaced from each other.
2. The air bearing of claim 1, wherein: the air supply hole is provided with a throttle nozzle, the nozzle is intersected with the inner circle of the bearing body in a tangential direction, and the nozzles are uniformly distributed on the surface of the inner circle of the bearing body; the pressurizing runner groove is a groove with the periphery closed, and the outer end of the pressurizing runner groove is also away from the edge of the bearing body.
3. The air bearing of claim 1, wherein: the bearing body is made of one of carbon graphite alloy, carbon fiber and polytetrafluoroethylene.
4. The air bearing of claim 1, wherein: the vibration reduction elastic ring is made of one of a rubber ring, metal rubber and an elastic composite material.
5. The air bearing of claim 1, wherein: the bearing body and the vibration reduction elastic ring are of a fluid dynamic pressure bearing sealing ring structure.
6. The air bearing of claim 1, wherein: the pressurizing runner grooves are arranged in a splayed shape on the inner circle surface of the bearing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101639953A CN101413541A (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101639953A CN101413541A (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing |
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| CN101413541A true CN101413541A (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101639953A Pending CN101413541A (en) | 2007-10-15 | 2007-10-15 | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing |
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Cited By (14)
| 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 |
| CN103199631A (en) * | 2013-04-25 | 2013-07-10 | 哈尔滨耦合动力工程技术中心有限公司 | Rotor energy storage system and rotor energy storage method using vortex motion energy |
| 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 |
| 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 |
| CN103453017A (en) * | 2013-05-08 | 2013-12-18 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic and static pressure air floating bearing with zooming structure molded line |
| CN105899824A (en) * | 2014-01-23 | 2016-08-24 | 西门子公司 | Damped bearing of a rotor shaft |
| CN105764623B (en) * | 2013-11-26 | 2017-10-03 | Sms集团有限公司 | Roller assembly for the roll in rolling equipment |
| 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 |
| CN110714981A (en) * | 2019-07-01 | 2020-01-21 | 青岛科技大学 | Novel dynamic pressure gas thrust bearing |
| CN111120502A (en) * | 2020-01-19 | 2020-05-08 | 至玥腾风科技集团有限公司 | 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 |
| CN113431844A (en) * | 2020-03-23 | 2021-09-24 | 东北林业大学 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
| CN114962299A (en) * | 2022-06-02 | 2022-08-30 | 北京航天动力研究所 | Long-life and low-noise turbofan and working method thereof |
| CN115370748A (en) * | 2022-07-04 | 2022-11-22 | 昆明理工大学 | Ring valve type floating ring seal with small throttling hole |
-
2007
- 2007-10-15 CN CNA2007101639953A patent/CN101413541A/en active Pending
Cited By (19)
| 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 |
| 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 |
| CN103199631A (en) * | 2013-04-25 | 2013-07-10 | 哈尔滨耦合动力工程技术中心有限公司 | Rotor energy storage system and rotor energy storage method using vortex motion energy |
| CN103453017A (en) * | 2013-05-08 | 2013-12-18 | 哈尔滨耦合动力工程技术中心有限公司 | Dynamic and static pressure air floating bearing with zooming structure molded line |
| 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 |
| CN105764623B (en) * | 2013-11-26 | 2017-10-03 | Sms集团有限公司 | Roller assembly for the roll in rolling equipment |
| CN105899824B (en) * | 2014-01-23 | 2018-08-10 | 西门子公司 | The shock-absorption support of armature spindle |
| US10050579B2 (en) | 2014-01-23 | 2018-08-14 | Siemens Aktiengesellschaft | Damped bearing of a rotor shaft |
| CN105899824A (en) * | 2014-01-23 | 2016-08-24 | 西门子公司 | Damped bearing of a rotor shaft |
| CN110714981A (en) * | 2019-07-01 | 2020-01-21 | 青岛科技大学 | Novel dynamic pressure gas thrust bearing |
| CN111120502A (en) * | 2020-01-19 | 2020-05-08 | 至玥腾风科技集团有限公司 | Air bearing |
| CN113431844A (en) * | 2020-03-23 | 2021-09-24 | 东北林业大学 | High-speed spiral groove small hole throttling dynamic and static pressure gas bearing device |
| 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 |
| CN114962299A (en) * | 2022-06-02 | 2022-08-30 | 北京航天动力研究所 | Long-life and low-noise turbofan and working method thereof |
| CN114962299B (en) * | 2022-06-02 | 2023-11-10 | 北京航天动力研究所 | Long-life low-noise turbine fan and working method thereof |
| CN115370748A (en) * | 2022-07-04 | 2022-11-22 | 昆明理工大学 | Ring valve type floating ring seal with small throttling hole |
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Open date: 20090422 |