CN102261379A - Air bearing of high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure - Google Patents
Air bearing of high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure Download PDFInfo
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- CN102261379A CN102261379A CN2010101812465A CN201010181246A CN102261379A CN 102261379 A CN102261379 A CN 102261379A CN 2010101812465 A CN2010101812465 A CN 2010101812465A CN 201010181246 A CN201010181246 A CN 201010181246A CN 102261379 A CN102261379 A CN 102261379A
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Abstract
The invention discloses an air bearing of a high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure, and relates to an air bearing of a new structural form. The dynamic and static coupling air bearing is structurally characterized in that: the bearing body is provided with a plurality of rows of pressure air supply holes, and a peripheral upper positive-oblique alternately arranged nozzle throttling air supply structure is adopted. The inner surface and the thrust surface of the bearing are provided with involute supercharged runner channel structures; and the depth and the width of runner channels are gradually astringed from the outside to the inside along the streamline meridian plane. An abrasion-resistant, high-temperature resistant and high-strength self-lubricating material is used as the material of the bearing body. The bearing capacity and the external load bearing capacity of the dynamic and static coupling air bearing and the short-time contact abrasion resistance of dynamic and static components are greatly improved; and because optimized design of inner channel molded lines and a nozzle throttling tangential air inlet structure, the operational stability is improved, and the application range of the air bearing is further widened. The air bearing is suitable for rotary machinery, the rotor mass of which is more than 10kg and the revolving speed of which is 60,000 to 80,000rpm.
Description
Technical field: the design and the manufacturing technology that the present invention relates to the high-speed rotating machine air-bearing.Be applicable to rotor quality more than 10kg, the rotating machinery of rotating speed more than 60000-80000rpm.
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 rotating machine and ultraprecise Instrument technology field.
Traditional active and static pressure air-bearing adopts nozzle throttling tangential admission hydrostatic lubrication and the lubricated mode that combines of interior conduit dynamic pressure (for example man type and splayed configuration etc.); As Fig. 1,2; The advantage of this lubricating structure is simple in structure, is convenient to safeguard, is used widely under many situations of the little quality rotor of underloading.But this structure still comes with some shortcomings, the one, adopt the simple circumferentially identical nozzle throttling tangential admission of structure, and structure is also identical in the axial direction for many simultaneously row's nozzle inlet holes, occurs the uneven and pneumatic unstable problem of axial carrying easily; The 2nd, conduit molded lines in tradition is simple is not taked any molded lines optimized Measures, has the carrying deficiency slow-speed of revolution under and pneumatic problem of unstable under the high rotating speed.
Summary of the invention: the objective of the invention is to overcome the shortcoming of above-mentioned prior art, propose a kind of new structure form, be specially adapted to air-bearing such as Fig. 3 of the involute active and static pressure coupling carrying that high-speed overload uses.This bearing has not only greatly improved the bearing capacity of active and static pressure air-bearing, and has taked interior conduit molded lines and the Optimal Structure Designing of nozzle throttling tangential admission, has improved operation stability, has further widened the scope that air-bearing is used.
Core technology of the present invention is to offer many row pressures power air vent at the air-bearing body, and air vent is between adjacent interior conduit, and not in conduit, the bearing inner radial surface is offered involute supercharging flow path groove simultaneously, as Fig. 3; Circumferential every row pressure power air vent adopts the tangential gas-supplying structure of nozzle throttling, and nozzle takes the form of forward-oblique alternate layout of making progress in week, as Fig. 4; Interior conduit is along the streamline meridian plane, and outside in flow path groove is restrained gradually, as Fig. 5; The thrust face of thrust-bearing is consistent with the axial end of radial bearing, just forms radially-the incorporate H type of thrust joint bearing, also adopts the design of involute conduit on the thrust face, along circumferentially evenly distributing, as Fig. 3,6; In the axial direction, the structure of many cribbings flow nozzle inlet hole is according to carrying and stability requirement, and each angle of inclination of arranging the nozzle air inlet also is optimized and different, as Fig. 7.
Its principle is the structural feature according to air-bearing and axle journal sound parts, and at dynamic and static gaps runner place, the power that utilizes the axle journal rotation to drive fluid pressurized and outside supply gas pressure coupling generation makes its axle suspension float.Offer many row pressures power air vent at bearing support, and adopt nozzle throttling gas-supplying structure, provide static pressure carrying and damping function floating of rotor; The bearing inner radial surface is offered involute supercharging flow path groove, 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; Interior conduit is along the streamline meridian plane, and outside in the flow path groove degree of depth and width all reduce, and this design has changed bearing inside along axial pressure distribution situation, makes that the carrying design is more reasonable, has improved stability.Circumferentially throttle nozzle is taked all upwards forms of forward-oblique alternate layout, has improved the circumferential pressure distribution, has improved stability.Simultaneously, in the axial direction, the structure of many cribbings flow nozzle inlet hole also according to carrying and stability requirement, is optimized and different, to improve axial carrying capacity and aerodynamic stability.
At the application conditions of air-bearing, adopt wear-resisting, high temperature resistant, high-intensity self lubricating material as gas bearing body material, solve 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, further improve the stability of air-bearing carrying operation.Technological scheme of the present invention mainly realizes as follows:
1. the selection of air-bearing body material, promptly according to the conditions such as temperature, pressure and working medium of air-bearing application, wear-resisting, high temperature resistant, the high-intensity self lubricating material of choose reasonable is as gas bearing body material;
2. the fluid active and static pressure structural design of air-bearing, promptly the static load of bearing according to air-bearing is that 10kg, working rotor rotating speed are 60000-80000rpm, and axle journal rotation, whirling motion rotating speed with bear load character, rationally determine the molded lines of involute supercharging flow path groove, finish the structural design that many row's nozzle throttling air vents and inner radial surface and thrust face are offered involute supercharging flow path groove;
3, 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.
Description of drawings
Accompanying drawing is the bearing structure schematic representation.
1 rotor journal, 2 bearing suppories, 3 interior conduits, 4 damping elastomer circles among the figure.
Fig. 1 is the tangential gas-supplying structure of nozzle throttling.
Fig. 2 is the interior channel structure of active and static pressure Mixed lubrication.
Fig. 3 is the air-bearing structure of involute active and static pressure coupling carrying.
Fig. 4 is a nozzle of taking forward-oblique alternate layout of making progress in week.
Conduit is along streamline meridian plane convergent structure gradually from outside to inside in Fig. 5.
Fig. 6 is the thrust face structure that adopts the design of involute conduit.
Fig. 7 is the different structure in angle of inclination of respectively arranging the nozzle air inlet on axially.
Claims (5)
1. dynamic-static pressure coupling air-float bearing is characterized in that:
(1) at bearing support along circumferentially offering many row pressures power air vent, and adopt the nozzle throttling gas-supplying structure of the forward-oblique alternate layout that makes progress in week.Air vent is between adjacent interior conduit, and not in conduit.
(2) offer circumferential equally distributed involute supercharging flow path groove structure at the radial bearing internal surface; Flow path groove is along the streamline meridian plane, and outside in the flow path groove degree of depth and width are all restrained gradually.
(3) thrust face of thrust-bearing is consistent with the axial end of radial bearing, just forms radially-the incorporate H type of thrust joint bearing.
(4) also adopt the design of involute conduit on the thrust face, along circumferentially evenly distributing.
2. according to right 1 described structure and method, it is characterized in that the air-bearing body offers many row pressures power air vent, and adopt the week nozzle throttling gas-supplying structure of forward-oblique alternate layout upwards.Air vent is between adjacent interior conduit, and not in conduit.
3. according to right 1 described structure and method, it is characterized in that bearing inner radial surface and thrust face offer involute supercharging flow path groove structural design.
4. according to right 1 described structure and method, it is characterized in that the thrust face of thrust-bearing is consistent with the axial end of radial bearing, just form radially-the incorporate H type of thrust joint bearing.
5. the active and static pressure structural design of pneumatic bearing, can satisfy rotor quality is more than the 10kg, working speed is the operating conditions of the above rotating machinery of 60000-80000rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101812465A CN102261379A (en) | 2010-05-25 | 2010-05-25 | Air bearing of high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101812465A CN102261379A (en) | 2010-05-25 | 2010-05-25 | Air bearing of high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure |
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| CN102261379A true CN102261379A (en) | 2011-11-30 |
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| CN2010101812465A Pending CN102261379A (en) | 2010-05-25 | 2010-05-25 | Air bearing of high-speed heavy-duty involute internal channel self-lubricating dynamic and static coupling structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188417A (en) * | 2018-02-06 | 2018-06-22 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle and its application method |
| CN110243601A (en) * | 2019-07-08 | 2019-09-17 | 淮海工学院 | Combination thrust and transverse bearing device and its detection method under a kind of operating condition suitable for ultrahigh speed |
| 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 |
-
2010
- 2010-05-25 CN CN2010101812465A patent/CN102261379A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188417A (en) * | 2018-02-06 | 2018-06-22 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle and its application method |
| CN108188417B (en) * | 2018-02-06 | 2024-03-08 | 中国计量大学 | Multiple throttling type static pressure air floatation motorized spindle and application method thereof |
| CN110243601A (en) * | 2019-07-08 | 2019-09-17 | 淮海工学院 | Combination thrust and transverse bearing device and its detection method under a kind of operating condition suitable for ultrahigh speed |
| CN110243601B (en) * | 2019-07-08 | 2020-10-09 | 淮海工学院 | Combined thrust and radial bearing device suitable for ultra-high-speed working condition and detection method thereof |
| 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 |
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Application publication date: 20111130 |