CN2658465Y - Ultrasonic bearing - Google Patents
Ultrasonic bearing Download PDFInfo
- Publication number
- CN2658465Y CN2658465Y CN 03211565 CN03211565U CN2658465Y CN 2658465 Y CN2658465 Y CN 2658465Y CN 03211565 CN03211565 CN 03211565 CN 03211565 U CN03211565 U CN 03211565U CN 2658465 Y CN2658465 Y CN 2658465Y
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- bearing
- bearing shell
- ultrasonic
- transducer
- supersonic
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Abstract
The utility model relates to an ultrasonic wave bearing composed of an ultrasonic wave generator(1), an ultrasonic energy transducer(16), an amplitude transforming rod(5) and a bearing bushing(7). A front cover plate (4) of the ultrasonic energy transducer (18) is securely connected with on the outside diameter of the bearing bushing (7) through the amplitude transforming rod (5). The axial lines of the ultrasonic energy transducer (18) and the bearing bushing (7) are vertically intersected. Two electrodes of the ultrasonic energy transducer (18) are electrically connected with the output terminal of the ultrasonic wave generator (1). The inside diameter of the bearing bushing (7) is provided with an axial oil storage cavity (8). The oil storage cavity (8) is communicated with an oil supply hole (13) on the bearing bushing (7). The utility model is a bearing formed by taking use of the suspension support of an ultrasonic vibration surface and the ability of modifying the lubricating performance; can avoid the contact between the bearing bushing and the bearing journal in order to attain the goal of improving the service life and operating performance for the bearing.
Description
Technical field
The utility model relates to a kind of novel bearing, and it is lubricated with the structure sliding bearing to the suspension support and the improvement of axle journal specifically to utilize ultrasonic vibration to form bearing shell.
Background technique
Suspension support that the ultrasonic vibration surface is had and antifriction ability, promptly be studied many years ago and confirm and obtained practical application, adopt ultrasonic vibration to reduce the surface friction drag of the auxiliary fulcrum of astrovehicle as US Airways space flight department, people such as ThomasSkare utilize hyperacoustic acoustic levitation and extruding air film that drop is freely suspended in medium, open-birth professor in bear field thinks that ultrasound can make surface friction drag be reduced to original about 1/10 to 1/30, the loyal row professor of last plumage confirms the flat board with 40KHz frequency 2 μ m amplitude vibrations, and its surperficial kinetic pressure can reach 0.75MPa.
The working procedure of tradition sliding bearing, as shown in Figure 4: when bearing is static (among the figure shown in a), contact between axle journal and the bearing shell, the bearing play is full of lubricant oil; When bearing is started working (among the figure shown in the b), the axle journal rotating speed is also smaller, axle journal slowly climbs to the right along the bearing shell inwall, bring lubricant oil into oil film wedge, because the lubricant oil in bringing between bearing does not also form complete lubricant film, have serious friction and wear between axle journal and the bearing shell, this phenomenon is called the mixed friction state; Along with the raising of journal velocity ω, the lubricant oil in the oil film wedge increases and forms gradually complete lubricant film gradually, and axle journal is offset and is stabilized in certain eccentric position (among the figure shown in the c) left.Process as can be seen thus, (exist too in the out-of-work process of bearing when friction and wear mainly concentrates on bearing and starts working between axle journal and the bearing shell, its process similarly, solve the friction and wear problem of bearing, improve the operating life and the service behaviour of bearing, will avoid bearing shell and axle journal to be in contact with one another in the course of the work exactly as far as possible.
Summary of the invention
The purpose of this utility model provides a kind of ultrasonic bearing, it is that the suspension support of utilizing the ultrasonic vibration surface to be had is improved the bearing that lubricated ability constitutes with formation, can avoid bearing axle journal when work to contact, reach the purpose that improves bearing working life-span and service behaviour with bearing shell.
Above-mentioned purpose of the present utility model is achieved in that in conjunction with the accompanying drawings and 1,2 is described as follows:
A kind of radial ultrasonic ripple bearing of the present utility model, form by ultrasonic generator 1, supersonic transducer 18, luffing bar 5, bearing shell 7, supersonic transducer 18 is fixedly connected on the external diameter of bearing shell 7 by luffing bar 5, the shaft axis of its shaft axis and bearing shell 7 intersects vertically, two electrodes of supersonic transducer 18 are electrically connected with the output terminal of ultrasonic generator 1, be provided with axial shoe cream room 8 on the internal diameter of bearing shell 7, shoe cream room 8 is connected with oil supply hole 13 on being arranged on bearing shell 7 walls.
Described supersonic transducer 18 is a Langevin oscillator structure, and the usefulness screw is fastening forms by front shroud 4 piezoelectric constant 3 and back shroud 2 for it, and copper sheet is made electrode on folder between the piezoelectric ceramic wafer, and its nodal section 17 is located on the interface of front shroud 4 and piezoelectric constant 3.Also can be piezoelectric stack, twin lamella oscillator.
The ultrasonic bearing working principle is to produce high-frequency signal by ultrasonic generator to give supersonic transducer, make supersonic transducer be in resonant condition, produce the little amplitude of high frequency (μ m level) vibration, amplitude is amplified and pass to bearing shell by the luffing bar, make inner surface of bearing bush be in the ultrasonic vibration state, because suspension support and hydrodynamic lubrication ability that the ultrasonic vibration surface is had, axle journal just are suspended in the central position and form stable hydrodynamic lubrication oil film in the bearing play.
The working procedure of ultrasonic bearing is as shown in Figure 5: when bearing is static (shown in d among Fig. 5), axle journal and bearing shell are in contact condition, are full of lubricant oil in the bearing play; When bearing working (shown in e among Fig. 5), the bearing shell surface is under the ultrasonic vibration state, the suspending power of utilizing the bearing shell vibration surface to be had suspends axle journal because action of ultrasonic waves, between bearing in the stable hydrodynamic lubrication oil film of formation; During bearing working (shown in f among Fig. 5), during ultrasonic bearing work, avoided the friction and wear between axle journal and the bearing shell, do not had the mixed friction state, thereby improved the operating life and the service behaviour of bearing.
Description of drawings
Fig. 1 is a radial ultrasonic ripple bearing master pseudosection.
Fig. 2 is that A-A shown in Figure 1 is to sectional view.
Fig. 3 looks generalized section for thrust ultrasonic bearing master.
Fig. 4 is traditional sliding bearing working procedure schematic representation.
Fig. 5 is a radial ultrasonic ripple bearing working process schematic representation.
Embodiment
As mentioned above, the utility model is to utilize ultrasonic vibration structure bearing, and its form is varied, and in general, ultrasonic bearing mainly is made up of supersonic transducer, ultrasonic generator, luffing bar, bearing shell etc.Can construct our needed bearing according to the utility model thought, be that example is illustrated with radial ultrasonic ripple bearing and thrust ultrasonic bearing mainly here.
Embodiment 1: radial ultrasonic ripple bearing
With reference to Fig. 1, Fig. 2, radial ultrasonic ripple bearing is by being made up of ultrasonic generator 1, supersonic transducer 18, luffing bar 5, bearing shell 7, the front shroud 4 of supersonic transducer 18 is fixedly connected on the external diameter of bearing shell 7 by luffing bar 5, the shaft axis of its shaft axis and bearing shell 7 intersects vertically, two electrodes of supersonic transducer 18 are electrically connected with the output terminal of ultrasonic generator 1, be provided with axial shoe cream room 8 on the internal diameter of bearing shell 7, shoe cream room 8 is connected with oil supply hole 13 on being arranged on bearing shell 7.
Supersonic transducer 18 is a Langevin oscillator structure, the usefulness screw is fastening forms by front shroud 4, piezoelectric constant heap 3 and back shroud 2 for it, copper sheet is made electrode on folder between the piezoelectric ceramic wafer of forming the brilliant heap 3 of piezoelectric constant, on front shroud 4 and piezoelectric constant heap 3 end faces that join, have flange, be the nodal section 17 of transducer 18.
This radial ultrasonic ripple bearing is symmetrically fixedly connected 4 supersonic transducers 18 on the external diameter of bearing shell 7, and the nodal section 17 usefulness screws 15 of transducer 18 are fixedly connected on the housing 9,10, and housing 9,10 is connected and fixed by bolt 11.
The circular groove 14 that housing 10 is provided with oil guiding hole 12 and is connected with oil supply hole 13 on the bearing shell 7.6 is axle journal among Fig. 2.During use, bearing housing is fixed on the bearing support.
In the present embodiment, be fastenedly connected with double-screw bolt between the front shroud 4 of luffing bar 5 and supersonic transducer 18, the effect of luffing bar 5 is that the particle displacement of mechanical vibration or vibration velocity are amplified, can also mate the impedance between supersonic transducer 18 and the bearing shell 7 in addition, make energy be delivered in the load well; Fixedly connected with double-screw bolt between luffing bar 5 and the bearing shell 7.Supersonic transducer 18, luffing bar 5, bearing shell 7 have constituted the vibration system of ultrasonic bearing together, and they convert electric energy to mechanical energy, and the particle vibration displacement is amplified, and pass to bearing shell 7, make bearing shell 7 surfaces be in the ultrasonic vibration state.
Because supersonic transducer 18 and luffing bar 5 mounting points are in the axial neutral position of bearing shell 7, do not leak and can in time unimpededly not be full of shoe cream room 8 for guaranteeing lubricant oil, the oil supply hole 13 on the bearing shell 7 can not be positioned at the axial neutral position of bearing shell 7; Owing to the particularity of ultrasonic bearing structure, circular groove 14 leaves on the second bearing housing part 10 simultaneously, to guarantee that not having the ground of leakage by circular groove 14 after lubricant oil enters from oil guiding hole 12 be full of shoe cream room 8 from each oil supply hole 13.Be full of lubricant oil in the shoe cream room 8 of bearing, guarantee in the bearing working fully lubricated.Because the working surface of bearing shell 7 is in the ultrasonic vibration state, can initiatively form the hydrodynamic lubrication oil film, experiment shows, after the ultrasonic transducer generating vibration, lubricant oil can launch and form the oil film with certain pressure along bearing shell and journal surface, thereby guarantee the stable of dynamic pressure oil film, the formation of dynamic pressure oil film was distinguishing when this and traditional sliding bearing were worked.The formation ability of ultrasonic bearing dynamic pressure oil film and the movement velocity of axle journal are irrelevant, and relevant with the vibration situation on bearing shell surface.
Radial ultrasonic ripple bearing structure is simpler than hydrostatic bearing, more can work under low speed than hydraulic bearing.Thereby ultrasonic bearing has certain wide application prospect.
Embodiment 2: the thrust ultrasonic bearing
With reference to Fig. 3, the thrust ultrasonic bearing is made up of ultrasonic generator 1, supersonic transducer 18, luffing bar 5, bearing (ball) cover 22, luffing bar 5 is fixedly connected on the front shroud 4 of supersonic transducer 18 by double-screw bolt, the end face of luffing bar 5 is provided with cone shape hole 19, promptly as bearing shell, be provided with annular shoe cream room 20 at the base angle of luffing bar cone shape hole 19, sidewall is provided with oil supply hole 21; Luffing bar 5 upper ends are equipped with flinger ring 23 by screw 24 fixedly connected bearing (ball) covers 22 on the internal diameter of bearing (ball) cover 22; Two electrodes of supersonic transducer 18 are electrically connected with the output terminal of ultrasonic generator 1.
Described supersonic transducer 18 is a Langevin oscillator structure, and usefulness screw is fastening forms by front shroud 4 piezoelectric constant heap 3 and back shroud 2 for it, and copper sheet is made electrode on folder between the piezoelectric ceramic wafer, and its nodal section 17 is located on the interface of front shroud 4 and piezoelectric constant 3.25 is axle journal among the figure.During use, supersonic transducer nodal section 17 is fixed on the bearing support.
Ultrasonic generator 1 produces high-frequency signal and gives supersonic transducer 18, when making it be in resonant condition, luffing bar 5 transmitting vibrations are also amplified amplitude, this moment, the cone shape hole surface of luffing bar was in the ultrasonic vibration state, produced acoustic levitation ability and hydrodynamic lubrication ability, and axle suspension is floated, lubricant oil in the shoe cream room 20 forms stable dynamic pressure oil film under the ultrasonic vibration effect simultaneously, reach lubrication effect, play the effect that resistance falls in antifriction, to reach the purpose that improves bearing working life-span and service behaviour.
The thrust ultrasonic bearing can be used for constructing middle or small bearing, long working life, rotating speed height.
Claims (4)
1. radial ultrasonic ripple bearing, it is characterized in that forming by ultrasonic generator (1), supersonic transducer (18), luffing bar (5), bearing shell (7), the front shroud (4) of supersonic transducer (18) is fixedly connected on the external diameter of bearing shell (7) by luffing bar (5), the shaft axis of its shaft axis and bearing shell (7) intersects vertically, two electrodes of supersonic transducer (18) are electrically connected with the output terminal of ultrasonic generator (1), be provided with axial shoe cream room (8) on the internal diameter of bearing shell (7), shoe cream room (8) is connected with oil supply hole (13) on being arranged on bearing shell (7).
2. a kind of radial ultrasonic ripple bearing according to claim 1, it is characterized in that supersonic transducer (18) is Langevin oscillator structure, it is formed with screw is fastening by front shroud (4), piezoelectric constant heap (3) and back shroud (2), folder is gone up copper sheet and is made electrode between the piezoelectric ceramic wafer of forming the brilliant heap of piezoelectric constant (3), on front shroud (4) and piezoelectric constant heap 3 end faces that join, have flange, be the nodal section (17) of transducer (18).
3. according to claim 1,2 described a kind of radial ultrasonic ripple bearings, it is characterized in that fixedly connected 4 supersonic transducers (18) symmetrically on the external diameter of bearing shell (7), the nodal section (17) of transducer (18) is fixedly connected on the housing (9,10) with screw (15), and housing (9,10) is connected and fixed by bolt 11.
4. according to claim 1,3 described a kind of radial ultrasonic ripple bearings, the circular groove (14) that the housing (10) under it is characterized in that is provided with oil guiding hole (12) and is connected with oil supply hole (13) on the bearing shell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211565 CN2658465Y (en) | 2003-02-25 | 2003-02-25 | Ultrasonic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211565 CN2658465Y (en) | 2003-02-25 | 2003-02-25 | Ultrasonic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2658465Y true CN2658465Y (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03211565 Expired - Fee Related CN2658465Y (en) | 2003-02-25 | 2003-02-25 | Ultrasonic bearing |
Country Status (1)
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| CN (1) | CN2658465Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556238A (en) * | 2013-07-22 | 2016-05-04 | 奥钢联钢铁公司 | Method and apparatus for the non-contact support of a sensor and/or actuator device |
| CN107269697A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工业大学 | It is a kind of to bear the ultrasound suspending bearing of radial and axial load simultaneously |
| CN109812501A (en) * | 2019-01-29 | 2019-05-28 | 湖南大学 | The flexible support tilting bush squeeze film gas thrust bearing to be suspended based on near-field ultrasound |
| CN110181343A (en) * | 2019-05-24 | 2019-08-30 | 集美大学 | A kind of hypersonic flow liquid/solid interface coupling support device assisting elongated helicoid grinding |
| CN112727926A (en) * | 2020-12-19 | 2021-04-30 | 北京工业大学 | Controllable aerostatic radial bearing system |
-
2003
- 2003-02-25 CN CN 03211565 patent/CN2658465Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556238A (en) * | 2013-07-22 | 2016-05-04 | 奥钢联钢铁公司 | Method and apparatus for the non-contact support of a sensor and/or actuator device |
| CN105556238B (en) * | 2013-07-22 | 2018-12-18 | 奥钢联钢铁公司 | Method and apparatus for non-contactly supporting sensing and/or actuator apparatus |
| CN107269697A (en) * | 2017-07-07 | 2017-10-20 | 哈尔滨工业大学 | It is a kind of to bear the ultrasound suspending bearing of radial and axial load simultaneously |
| CN107269697B (en) * | 2017-07-07 | 2019-07-16 | 哈尔滨工业大学 | A kind of ultrasound suspending bearing being able to bear at the same time radial and axial load |
| CN109812501A (en) * | 2019-01-29 | 2019-05-28 | 湖南大学 | The flexible support tilting bush squeeze film gas thrust bearing to be suspended based on near-field ultrasound |
| CN110181343A (en) * | 2019-05-24 | 2019-08-30 | 集美大学 | A kind of hypersonic flow liquid/solid interface coupling support device assisting elongated helicoid grinding |
| CN112727926A (en) * | 2020-12-19 | 2021-04-30 | 北京工业大学 | Controllable aerostatic radial bearing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |