CN211778556U - T-shaped small-hole throttling air-flotation rotary table - Google Patents
T-shaped small-hole throttling air-flotation rotary table Download PDFInfo
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- CN211778556U CN211778556U CN201922053639.7U CN201922053639U CN211778556U CN 211778556 U CN211778556 U CN 211778556U CN 201922053639 U CN201922053639 U CN 201922053639U CN 211778556 U CN211778556 U CN 211778556U
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Abstract
The utility model relates to a T-shaped small hole throttling air-float rotary table, which comprises a workbench (1), wherein a rotary shaft (3) is connected to the bottom of the workbench (1); the cover plate (2) and the rotating shaft (3) are arranged between the workbench (1) and the disc of the rotating shaft (3) from top to bottom, the radial bearing (9) is arranged on the outer side of the main body of the rotating shaft (3), and the distance ring (5) is arranged on the outer side of the disc of the rotating shaft (3) and is positioned between the thrust bearing (4) and the radial bearing (9); the air chamber outer sleeve (8) is arranged on the outer side of the radial bearing (9); the base (10) is arranged at the bottom of the air chamber outer sleeve (8) and the radial bearing (9); the side surface of the radial bearing (9) is provided with a first air floatation hole (91) facing the body of the rotating shaft (3), the upper part of the radial bearing (9) is provided with a throttling hole (11) facing the lower part of the disk of the rotating shaft (3), and the thrust bearing (4) is internally provided with a throttling hole (11) facing the upper part of the disk of the rotating shaft (3). The device is a high-precision air bearing.
Description
Technical Field
The utility model relates to an air supporting bearing, concretely relates to T type aperture throttle air supporting revolving stage.
Background
The air-float rotary table (air rotary table) is designed to suspend the main shaft in the air, and can stably and accurately rotate, the suspension is realized by the air with certain pressure introduced into the bearing cavity, the pressure relief gap is extremely small, and the suspension of the rotating shaft is ensured. The speed and the accuracy are high; no friction force exists; no abrasion is caused; lubricating oil is not needed; excellent speed control performance; no noise and the like. Because of the many advantages of air-floating turrets, air bearings are now used in more and more high precision applications to replace conventional mechanical bearings.
The existing air bearing is generally small in size, low in rigidity and general in bearing capacity, only can clamp a small workpiece, is difficult to bear a large workpiece, is generally made of common materials, and is difficult to use for a long time under complex working conditions.
In view of the above-mentioned defects, the present designer actively makes research and innovation to create a T-shaped small-hole throttling air-floating rotary table with a novel structure, and because the axial air-floating surface of the present design has a large size, a large axial rigidity and axial bearing capacity can be obtained, and the movement precision is high, so that the present invention has industrial utilization value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a T type aperture throttle air supporting revolving stage.
The technical scheme of the utility model as follows:
the utility model provides a T type aperture throttle air supporting revolving stage which characterized in that: comprises a workbench (1), a cover plate (2), a rotating shaft (3), a thrust bearing (4), a distance ring (5), an air chamber outer sleeve (8), a radial bearing (9) and a base (10);
the detection device comprises a workbench (1), a rotating shaft (3), a motor, a detection or processing workpiece, a detection or processing;
the cover plate (2) and the rotating shaft (3) are both circular rings and are sequentially arranged between the working table (1) and the discs of the rotating shaft (3) from top to bottom, the radial bearing (9) is arranged on the outer side of the main body of the rotating shaft (3), the distance ring (5) is arranged on the outer side of the discs of the rotating shaft (3) and is positioned between the thrust bearing (4) and the radial bearing (9), the height of the distance ring (5) is higher than that of the discs of the rotating shaft (3), and the diameter of the radial bearing (9) is larger than that of the rotating shaft (3);
the air chamber outer sleeve (8) is arranged on the outer side of the radial bearing (9);
the base (10) is arranged at the bottom of the air chamber outer sleeve (8) and the radial bearing (9);
the side of radial bearing (9) is provided with orientation first air supporting hole (91) of pivot (3) body, the upper portion of radial bearing (9) is provided with the orientation orifice (11) of pivot (3) disc lower part, be provided with the orientation in footstep bearing (4) orifice (11) on pivot (3) disc upper portion.
Further, a pneumatic connector (7) is arranged on the outer side of the air chamber outer sleeve (8), and the pneumatic connector (7) is communicated with the first air floatation hole (91) and the throttling hole (11).
Furthermore, the height of the distance ring (5) is higher than the disc of the rotating shaft (3) by 20-30 um.
Furthermore, the diameter of the radial bearing (9) is larger than the diameter of the rotating shaft (3) by 20-40 um.
Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:
the device has the advantages of simple structure, higher axial rigidity and radial rigidity, higher bearing capacity, higher motion precision and stability.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic sectional view of the present invention;
FIG. 3 is a schematic view of the orifice of the present invention;
in the figure: the device comprises a workbench-1, a cover plate-2, a rotating shaft-3, a thrust bearing-4, a fifth air groove-41, a distance ring-5, a sixth air groove-51, a jackscrew-6, a pneumatic connector-7, an air chamber outer sleeve-8, a first air groove-81, a second air groove-82, a third air groove-83, a radial bearing-9, a first air floating hole-91, a fourth air groove-92, a base-10 and a throttling hole-11.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model relates to a preferred embodiment a T type aperture throttle air supporting revolving stage, the device can effectively improve the precision index of air supporting revolving stage to can show the stability that improves the air supporting revolving stage, satisfy precision finishing's requirement.
Referring to fig. 1 to 3, the device comprises a workbench 1, a cover plate 2, a rotating shaft 3, a thrust bearing 4, a distance ring 5, a jackscrew 6, a pneumatic connector 7, an air chamber outer sleeve 8, a radial bearing 9, a base 10 and a throttling hole 11.
The workbench 1 is a T-shaped workbench, and mainly comprises a hollow cylindrical body and a disc at the end part of the body, wherein the end surface of the disc is provided with a plurality of screw holes which can be used for connecting external workpieces. The rotating shaft 3 is also in a T shape and also comprises a hollow cylindrical body and a disc at the end part of the body, the disc of the rotating shaft 3 is used as an air floating surface, and the diameter of the rotating shaft 3 is consistent with that of the workbench 1 and is connected to the bottom of the workbench 1. The rotating shaft 3 and the working table 1 form a rotor part of the whole air-floating rotary table.
The thrust bearing 4, the distance ring 5 and the radial bearing 9 form the gas bearing part of the whole device, the radial bearing 9 is on the outside of the rotating shaft 3, the thrust bearing 4 is arranged on the outside of the working table 1, and the distance ring 5 is arranged on the outside of the disc of the rotating shaft 3 and between the thrust bearing 4 and the radial bearing 9. Wherein the height of distance ring 5 is higher than the disc of pivot 3, and the height that specifically exceeds is 20-30um, can guarantee like this that the unilateral air film's of follow-up pivot 3 upper and lower both sides height is 10-15um, and radial bearing 9's radial dimension is greater than to change into 20 ~ 40um for pivot 3, can guarantee that the air film clearance of the body bicycle of carousel 3 is 10 ~ 20 um.
An air chamber outer sleeve 8 is arranged on the outer side of the radial bearing 9, and a base 10 is further arranged at the bottom of the radial bearing 9 and the air chamber outer sleeve 8.
The air chamber outer sleeve 8 is internally provided with a horizontal annular first air groove 81, the air chamber outer sleeve 8 is externally provided with a pneumatic connector 7, the pneumatic connector 7 is connected with an external air source, and the pneumatic connector 7 is communicated with the first air groove 81. A vertical hollow cylindrical second air groove 82 and a horizontal disc-shaped third air groove 83 are formed between the outer wall of the radial bearing 9 and the inner wall of the air chamber outer sleeve 8, two rows of first air floating holes 91 are formed in an annular array on the radial bearing 9, the first air floating holes 91 are communicated with the second air groove 82, and the first air floating holes 91 face the center of the radial bearing 9. A fourth air groove 94 communicated with the third air groove 83 is further arranged in the upper portion of the radial bearing 9, a plurality of throttling holes 11 are arranged in an annular array on the upper portion of the fourth air groove 94, air sources can be conveyed to the lower surface of the disc of the rotating shaft 3 through the throttling holes 11, an annular sixth air groove 51 is further arranged between the disc of the rotating shaft 3 and the distance ring 5, a fifth air groove 41 communicated with the sixth air groove 51 is arranged on the thrust bearing 4, a plurality of throttling holes 11 are arranged in an annular array on the fifth air groove 41, and the air sources can be conveyed to the upper surface of the disc of the rotating shaft 3 through the throttling holes 11.
An annular cover plate 2 is arranged between the lower surface of the disc of the workbench 1 and the thrust bearing 4.
In the device, the material of the rotating shaft 3 is 7075 aluminum alloy, artificial aging and deep cooling treatment are carried out, and the position of the air floatation surface needs to be subjected to ultra-precise turning or ultra-precise grinding to reach submicron-level shape precision and nanoscale surface roughness.
The thrust bearing 4, the radial bearing 9 and the throttle hole 11 are all made of H62 materials, the throttle hole 11 and the bearing are installed in an interference fit mode, the same materials have good fusion performance, ultra-precision turning or ultra-precision grinding machining is carried out after installation is finished, installation consistency of the throttle holes can be guaranteed to the maximum extent, and surface roughness and shape accuracy of the thrust bearing 4 and the radial bearing 9 can be guaranteed to the maximum extent.
The first air floating hole 91 of the radial bearing 9 adopts double rows of throttling holes, so that the radial bearing capacity of the rotary table is improved.
The working principle of the utility model is as follows:
this device forms the air supporting to the outer wall of pivot 3 through radial bearing 9's first air supporting hole 91, through the orifice 11 that sets up in both sides about the pivot 3 carousel, can form the air supporting to the carousel of pivot 3.
The device has the following advantages:
the device has the advantages of simple structure, higher axial rigidity and radial rigidity, higher bearing capacity, higher motion precision and stability.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a T type aperture throttle air supporting revolving stage which characterized in that: comprises a workbench (1), a cover plate (2), a rotating shaft (3), a thrust bearing (4), a distance ring (5), an air chamber outer sleeve (8), a radial bearing (9) and a base (10);
the workbench (1) and the rotating shaft (3) are both T-shaped, and the workbench (1) is connected to the top of the rotating shaft (3); a detected or processed workpiece is placed above the workbench (1), a motor is connected below the rotating shaft (3), and the motor drives the rotating shaft (3) and the workbench (1) to rotate;
the cover plate (2) and the rotating shaft (3) are both circular rings and are sequentially arranged between the working table (1) and the discs of the rotating shaft (3) from top to bottom, the radial bearing (9) is arranged on the outer side of the main body of the rotating shaft (3), the distance ring (5) is arranged on the outer side of the discs of the rotating shaft (3) and is positioned between the thrust bearing (4) and the radial bearing (9), the height of the distance ring (5) is higher than that of the discs of the rotating shaft (3), and the diameter of the radial bearing (9) is larger than that of the rotating shaft (3);
the air chamber outer sleeve (8) is arranged on the outer side of the radial bearing (9);
the base (10) is arranged at the bottom of the air chamber outer sleeve (8) and the radial bearing (9);
the side of radial bearing (9) is provided with orientation first air supporting hole (91) of pivot (3) body, the upper portion of radial bearing (9) is provided with the orientation orifice (11) of pivot (3) disc lower part, be provided with the orientation in footstep bearing (4) orifice (11) on pivot (3) disc upper portion.
2. The T-shaped small hole throttling air-floating rotary table according to claim 1, characterized in that: the outer side of the air chamber outer sleeve (8) is provided with a pneumatic connector (7), and the pneumatic connector (7) is communicated with the first air floatation hole (91) and the throttling hole (11).
3. The T-shaped small hole throttling air-floating rotary table according to claim 1, characterized in that: the height of the distance ring (5) is higher than the disc of the rotating shaft (3) by 20-30 um.
4. The T-shaped small hole throttling air-floating rotary table according to claim 1, characterized in that: the diameter of the radial bearing (9) is larger than the diameter of the rotating shaft (3) by 20-40 um.
5. A T-shaped orifice throttling air-float turntable as claimed in claim 1, characterized in that the material of said spindle (3) is: any one of 7075 aluminum alloy with hard anodic oxidation pair on the surface, 38GrMoAl alloy steel with nitrided surface and Y1Cr17 with nitrided surface.
6. A T-aperture throttling air-float turntable as claimed in claim 1, characterized in that said thrust bearing (4) and radial bearing (9) are made of: surface nitrided H62, surface nitrided 38GrMoAl, surface high temperature sprayed MoSi2 coated 6061 aluminum alloy.
7. The T-shaped small hole throttling air-floating rotary table according to claim 1, characterized in that: the throttle hole (11) is arranged on the thrust bearing (4) and the radial bearing (9) in an interference fit or bonding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922053639.7U CN211778556U (en) | 2019-11-25 | 2019-11-25 | T-shaped small-hole throttling air-flotation rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922053639.7U CN211778556U (en) | 2019-11-25 | 2019-11-25 | T-shaped small-hole throttling air-flotation rotary table |
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| Publication Number | Publication Date |
|---|---|
| CN211778556U true CN211778556U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922053639.7U Active CN211778556U (en) | 2019-11-25 | 2019-11-25 | T-shaped small-hole throttling air-flotation rotary table |
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| CN (1) | CN211778556U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770674A (en) * | 2021-09-18 | 2021-12-10 | 中国工程物理研究院机械制造工艺研究所 | Assembling device and assembling method |
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
| CN114619266A (en) * | 2022-02-28 | 2022-06-14 | 泰山学院 | Compact gas static pressure shafting structure |
| CN116476017A (en) * | 2023-04-25 | 2023-07-25 | 苏州速易德工业装备系统有限公司 | Air-floating rotary table |
-
2019
- 2019-11-25 CN CN201922053639.7U patent/CN211778556U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770674A (en) * | 2021-09-18 | 2021-12-10 | 中国工程物理研究院机械制造工艺研究所 | Assembling device and assembling method |
| CN114221518A (en) * | 2021-12-09 | 2022-03-22 | 北京航空航天大学 | Superconducting motor system with air bearing structure |
| CN114619266A (en) * | 2022-02-28 | 2022-06-14 | 泰山学院 | Compact gas static pressure shafting structure |
| CN116476017A (en) * | 2023-04-25 | 2023-07-25 | 苏州速易德工业装备系统有限公司 | Air-floating rotary table |
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