CN204387109U - Double-layer air flotation bearing - Google Patents
Double-layer air flotation bearing Download PDFInfo
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- CN204387109U CN204387109U CN201420853038.9U CN201420853038U CN204387109U CN 204387109 U CN204387109 U CN 204387109U CN 201420853038 U CN201420853038 U CN 201420853038U CN 204387109 U CN204387109 U CN 204387109U
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Abstract
Double-layer air flotation bearing, comprise axle core and the body with air-bearing section, this axle core have the first flying disc and the second flying disc, body air-bearing section has and the first air chamber of the first flying disc and the second flying disc Spielpassung and the second air chamber, first air chamber, the second air chamber upper and lower end face all arrange multiple fumaroles of circumferentially array distribution, by being arranged at the air flue in body, fumarole and external air source are realized gas circuit conducting, the air film of generation can allow axle core keep mechanical friction not occurring with body.It is low that the utility model overcomes individual layer air-bearing bearing capacity in the past, the defect of unstable properties.By double-layer air flotation bearing, the bearing capacity of axle core is doubled, allow the Applicable scope of processing become wide.The utility model structure is simply easily implemented, and is conducive to the large-scale promotion application in industry.
Description
Technical field
The utility model relates to a kind of mechanism utilizing fluid bearing axle system, particularly a kind of double-layer air flotation bearing.
Background technique
Air-floating main shaft adopts air-bearing for supporting, and operation process frictional loss is little, has the advantages such as long-life, highi degree of accuracy, low vibration, high rotating speed, and due to stability high, cutter loss can be reduced in course of working, extend stage property working life, improve machined surface quality.Structure is simple simultaneously, is easy to mounting or dismounting, is convenient to the maintaining of later stage for main shaft.But compared to ball bearing spindle, also there is the shortcomings such as bearing capacity is lower, rigidity is lower in air-floating main shaft.At present, the air-bearing of various air-floating main shaft application is all the air-bearing of form of single sheet, namely axle core is furnished with a flying disc, flying disc both ends of the surface are the thrust surface of corresponding air-bearing and the thrust surface of thrust-bearing respectively, not yet occurs the air-bearing structure of application multi-layer form.The air-bearing of multi-layer form, can increase the bearing capacity of air-floating main shaft at double, rigidity, and thus air-floating main shaft can bear larger cutting force in course of working, expands the using scope of air-floating main shaft.But not yet there is the pneumatically supported structure of similar generation economic benefits and social benefits in existing air-floating main shaft.As which limit the machining range of relevant machining equipment.
Model utility content
The utility model provides a kind of double-layer air flotation bearing, solves existing individual layer air-bearing bearing capacity low, poor stability, the problem that the scope that can participate in processing is narrower.
For achieving the above object, the utility model adopts following technological scheme:
Double-layer air flotation bearing, comprising:
Body, the inner side surface of its lower end has air-bearing section, described air-bearing section is provided with along axis to the first air chamber staggered and the second air chamber, and the upper and lower end face of described first air chamber, the second air chamber all has multiple fumaroles of circumferentially array distribution;
Be connected to the axle core of body, described axle core side has the first flying disc, the second flying disc; Described first flying disc be contained in the first air chamber and with the inwall Spielpassung of the first air chamber, described second flying disc be contained in the second air chamber and with the inwall Spielpassung of the second air chamber;
Be arranged at the air flue in body, described fumarole and external air source are by air flue conducting.
Preferably, axle core comprises the axle core print section of band first flying disc once arranged, axle core changeover portion, axle core rear with the second flying disc from top to bottom; Described axle core print section, transition shaft part, axle core rear are fixed together by a connection piece.So, the manufacture of axle core is by fairly simple and cheap.
Preferably, described air-bearing section is by comprising the plug-in part, the first ring part, transition ring part, the second ring part, the outer plugin that arrange from top to bottom; The cutting graftage part that described plug-in part has is plugged in body and combines closely in body; Combine closely plug-in part in the upper-end surface of the first ring part, combine closely transition ring part upper-end surface in the lower end surface of the first ring part, combining closely the upper-end surface of the second ring part in the lower end surface of transition ring part, combines closely the upper-end surface of outer plugin in the lower end surface of the second ring part; The cylindrical of described plug-in part, the first ring part, transition ring part, the second ring part, outer plugin is identical with the outside diameter of body.So, the air-bearing section of body will be easier to manufactured, processing and assembly cost less.
Preferably, described air-bearing section is combined closely by left semicircle module and right semi-circle module and is formed.So, air-bearing section then can reduce the various defect of aforementioned schemes part, reduces high-pressure air and leaks, also can adaptive integrally formed axle core and the axle core that is assembled into according to axle core print end, transition shaft part, axle core rear.
Preferably, in described fumarole, damping plug is installed.
Compared to prior art, the beneficial effects of the utility model are:
Double-layer air flotation bearing, the air flotation effect doubling single air-bearing can be produced, utilize the air film being filled in axle core and body gap to reduce friction between axle core and body, increase axle core bearing capacity more reliably, thus the Applicable scope that machine cut is processed is wider.The utility model structure is simple, easy to manufacture, gas-path leakage is little, and efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below accompanying drawing combination technology scheme required in describing embodiment is described.
Fig. 1 is the schematic diagram of the utility model embodiment;
Fig. 2 is the utility model sectional type axle core schematic diagram;
Fig. 3 is amplification effect figure corresponding to Figure 1A place;
Fig. 4 is that the utility model is with the schematic diagram of two semicircle module composition bodies.
Reference character: 10, body; 100, left semicircle module; 101, right semi-circle module; 110, radial gas transmission road; 11, gas transmission road; 12, plug-in part; 130, the first ring part; 131, the second ring part; 140, the first air chamber; 141, the second air chamber; 15, transition ring part; 16, outer plugin; 17, damping plug; 20, axle core; 21, the first flying disc; 22, the second flying disc.
Embodiment
Below with reference to embodiment and accompanying drawing, the utility model is further described:
Axle core 20 is allowed mechanical frictionally to rotate in body 10 in order to meet, the utility model is divided into two large cores, as shown in Figure 1, axle core 20 and body 10, the lower end of its axis core 20 has the first flying disc 21 and the second flying disc 22, this first flying disc 21, second flying disc 22 is all radial disk outward, first flying disc 21 is set, the object of the second flying disc 22 is that the high velocity air allowing fumarole spray forms air film, and act on the end face of flying disc, flying disc provides enough and accepts air film area, produce again enough thrust allow axle core 20 in the axial direction retainer shaft core 20 do not contact with body 10.
As shown in Figure 3, body 10 lower end has an air-bearing section, this air-bearing section have can with the first air chamber 140 of the first flying disc 21 Spielpassung, and have can with the second air chamber 141 of the second flying disc 22 Spielpassung; Stagger vertically between first air chamber 140 and the second air chamber 141; First flying disc 21, second flying disc 22 of axle core 20 accordingly with the first air chamber 140, second air chamber 141 Spielpassung, the upper and lower end face place of the first air chamber 140 and the second air chamber 141 is provided with multiple fumaroles of circumferentially array distribution.This fumarole is arranged symmetrically in the upper and lower end face of air chamber.In addition, be provided with air flue in body 10, fumarole is communicated with external air source by described air flue.
As shown in Figure 3, during use, under the effect of the high-speed air of fumarole ejection, the upper and lower end face of the first flying disc 21 and the second flying disc 22 is subject to air supporting thrust.But, when the first flying disc 21 or the second flying disc 22 are more close to fumarole, the air supporting thrust that the fumarole comparatively pressed close to gives can be larger, otherwise then air supporting thrust is less.Therefore, when the high velocity air sprayed, when the air supporting thrust of generation overcomes axle core 20 gravity and workpiece to the reaction force of axle core 20, axle core 20 will keep not producing mechanical friction with body 10 in body 10.In addition, in the side of axle core 20, axle core 20 is also Spielpassung with the plug-in part 12 of air-bearing section, has radial gap between axle core 20 and plug-in part 12 madial wall.
The effect that this gap is played allows the air of flowing in gap, form flow at high speed air film, avoids axle core 20 radial direction is subject to mechanical friction, also make the air entered externally be discharged by other positions of body 10 simultaneously.
Certainly, what high velocity air produced air film has certain tolerance range, and give the reaction force size of axle core 20 in air film thrust tolerance range as long as outside, body 10 and axle core 20 can not produce mechanical friction.Therefore, double-layer air flotation bearing must produce larger thrust to axle core 20, and in other words, the bearing capacity of axle core 20 also can improve relatively.
In the utility model, axle core 20 can be set to the following two kinds structural type:
Mode one: axle core 20, first flying disc 21 and second flying disc 22 of integral type are one-body molded with axle core 20;
Mode two: the axle core 20 of sectional type, as shown in Figure 2, whole axle core 20 is divided into axle core print section, transition shaft part, axle core rear three parts, and these three parts realize split with link, and this link can be screw.
In the utility model, the body 10 coordinated with axle core 20 can be set to the following two kinds combination:
Mode one: air-bearing section, as shown in Figure 4, can be divided into left semicircle module 100 and be formed by connecting by right semi-circle module 101, the benefit of this molding mode be that part is less, and its air-bearing section is applicable to the axle core 20 of integral type and the axle core 20 of sectional type;
Mode two: in body 10 lower end according to sequentially installing plug-in part 12, first ring part 130 from top to bottom, transition fit section, the second ring part 131, outer plugin 16.Particularly, the upper end of plug-in part 12 is plugged in body 10 lower end inner wall, combine closely in the upper-end surface of the first ring part 130 and the lower end surface of plug-in part 12, combine closely in the upper-end surface of transition ring part 15 and the lower end surface of the first ring part 130, combining closely in the upper-end surface of the second ring part 131 and the lower end surface of transition ring part 15, combines closely in the upper-end surface of outer plugin 16 and the lower end surface of the second ring part 131; Wherein, plug-in part 12, the first ring part 130, transition ring part 15, second ring part 131, the cylindrical of outer plugin 16 is all identical with the outside diameter of body 10.
The advantage of this structure is easily manufactured, with low cost, but can only adapt to sectional type axle core 20; Particularly, the first air chamber 140 is surrounded by described plug-in part 12 lower surface, the inner side surface of the first ring part, the upper surface of transition fit section; Second air chamber 141 is surrounded by the surface of transition fit section, the inner side surface of the second ring part, the upper surface of outer plugin 16.
As shown in Figure 4, the type of the air flue in body 10 can be divided into gas transmission road 11 and 110 two kinds, radial gas transmission road, and fumarole is connected external high pressure source of the gas by gas transmission road 11 with radial gas transmission road 110.The benefit of design like this, is to facilitate gas circuit to process, and reduces processing cost.
In order to make to keep certain pressure in air flue, improving flowing velocity and the flowing velocity of gap air film between axle core 20 and body 10 of between centers gap air film simultaneously, in each fumarole, damping plug 17 being all installed.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model.To one skilled in the art, according to technological scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection domain of the utility model claim.
Claims (5)
1. double-layer air flotation bearing, is characterized in that: comprise,
Body, the inner side surface of its lower end has air-bearing section, described air-bearing section is provided with along axis to the first air chamber staggered and the second air chamber, and the upper and lower end face of described first air chamber, the second air chamber all has multiple fumaroles of circumferentially array distribution;
Be connected to the axle core of body, described axle core side has the first flying disc, the second flying disc; Described first flying disc be contained in the first air chamber and with the inwall Spielpassung of the first air chamber, described second flying disc be contained in the second air chamber and with the inwall Spielpassung of the second air chamber;
Be arranged at the air flue in body, described fumarole and external air source are by air flue conducting.
2. double-layer air flotation bearing according to claim 1, is characterized in that: axle core comprises the axle core print section of band first flying disc once arranged, axle core changeover portion, axle core rear with the second flying disc from top to bottom; Described axle core print section, transition shaft part, axle core rear are fixed together by a connection piece.
3. double-layer air flotation bearing according to claim 1, is characterized in that: air-bearing section is by comprising the plug-in part, the first ring part, transition ring part, the second ring part, the outer plugin that arrange from top to bottom; The cutting graftage part that described plug-in part has is plugged in body and combines closely in body; Combine closely plug-in part in the upper-end surface of the first ring part, combine closely transition ring part upper-end surface in the lower end surface of the first ring part, combining closely the upper-end surface of the second ring part in the lower end surface of transition ring part, combines closely the upper-end surface of outer plugin in the lower end surface of the second ring part; The cylindrical of described plug-in part, the first ring part, transition ring part, the second ring part, outer plugin is all identical with the outside diameter of body.
4. double-layer air flotation bearing according to claim 1, is characterized in that: described air-bearing section is combined closely by left semicircle module and right semi-circle module and formed.
5. according to the double-layer air flotation bearing in claim 1-4 described in any one, it is characterized in that: in described fumarole, damping plug is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420853038.9U CN204387109U (en) | 2014-12-26 | 2014-12-26 | Double-layer air flotation bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420853038.9U CN204387109U (en) | 2014-12-26 | 2014-12-26 | Double-layer air flotation bearing |
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| Publication Number | Publication Date |
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| CN204387109U true CN204387109U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420853038.9U Active CN204387109U (en) | 2014-12-26 | 2014-12-26 | Double-layer air flotation bearing |
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| CN (1) | CN204387109U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883896A (en) * | 2017-12-27 | 2018-04-06 | 东莞市显隆电机有限公司 | A kind of air-flotation type flatness checking device |
| CN108691895A (en) * | 2017-03-31 | 2018-10-23 | 卡尔蔡司工业测量技术有限公司 | Air bearing with variable air delivering |
-
2014
- 2014-12-26 CN CN201420853038.9U patent/CN204387109U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691895A (en) * | 2017-03-31 | 2018-10-23 | 卡尔蔡司工业测量技术有限公司 | Air bearing with variable air delivering |
| US10683894B2 (en) | 2017-03-31 | 2020-06-16 | Carl Zeiss Industrielle Messtechnik Gmbh | Air bearing with variable air delivery |
| CN107883896A (en) * | 2017-12-27 | 2018-04-06 | 东莞市显隆电机有限公司 | A kind of air-flotation type flatness checking device |
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