CN206592433U - A kind of pressurized air thrust bearing - Google Patents
A kind of pressurized air thrust bearing Download PDFInfo
- Publication number
- CN206592433U CN206592433U CN201720225448.2U CN201720225448U CN206592433U CN 206592433 U CN206592433 U CN 206592433U CN 201720225448 U CN201720225448 U CN 201720225448U CN 206592433 U CN206592433 U CN 206592433U
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- Prior art keywords
- micro
- bearing
- pressurized air
- structural
- throttle orifice
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Abstract
The utility model provides a kind of pressurized air thrust bearing.Described pressurized air thrust bearing uses the throttle orifice with micro-structural chamber, and a number of micro-structural groove is processed on bearing working face, so that air-flow undergoes repeatedly expansion during by throttle orifice and air film gap, strengthen throttle orifice and the throttle effect in air film gap by the thermodynamic losses repeatedly expanded, so as to reach the purpose for improving rigidity.The utility model has simple in construction, and processing cost is low, process stabilizing, the advantages of quality controllable, and the traditional orifice restriction pressurized air thrust bearing of its ratio of rigidity is high, and manufacturing cost is close with traditional orifice restriction pressurized air thrust bearing.
Description
Technical field
The utility model belongs to hydrostatic gas-lubricated bearing, and in particular to a kind of pressurized air thrust bearing.
Background technology
Orifice restriction pressurized air thrust bearing due to high-precision advantage on precision machine tool and precision measurement equipment
There is irreplaceable important application.Bearing rigidity is the main performance index of orifice restriction pressurized air thrust bearing, is also true
Protect the key of bearing accuracy and precision stability.Orifice restriction pressurized air thrust bearing typically uses the throttle orifice of smaller aperture due
With less air film gap, gas is set to occur stronger throttle effect during by the gentle intermembrane space of throttle orifice, so as to have
Beneficial to the raising of bearing rigidity.Common orifice restriction pressurized air thrust bearing, its throttle diameter between 0.1 ~ 0.4mm,
And air film gap is between 10 ~ 100 μm.Although throttle effect can be strengthened by further reducing the aperture of throttle orifice and air film gap
And bearing rigidity is further improved, but to obtain and adding less than the throttle orifice of 0.1mm diameters or the air film gap less than 10 μm
The upper difficulty of work manufacture is very big, while also bringing higher processing and manufacturing cost.
The content of the invention
In order to overcome, the processing and manufacturing difficulty of pressurized air thrust bearing in the prior art is big, it is high not to fabricate cost
Foot, the utility model proposes a kind of pressurized air thrust bearing.
The technical solution of the utility model is as follows：
A kind of pressurized air thrust bearing of the present utility model, is characterized in, described pressurized air thrust bearing includes
Diameter identical thrust button and bearing, its annexation are that thrust button is located at the top of bearing, and thrust button is concentric with bearing
Set.On described bearing several structure identical throttle orifices are evenly arranged with along throttling pore size distribution circle；Described throttle orifice is
One through hole, is provided with several micro-structural chambers in through-holes.The aperture of throttle orifice upper end is located on bearing working face, throttle orifice lower end
Connected with the air vent for being arranged on bearing bottom surface.Micro-structural groove I, the micro-structural of annular concentric are respectively arranged with bearing working face
Groove II.Micro-structural groove I is located at throttling pore size distribution circle both sides with micro-structural groove II.
The diameter of described micro-structural chamber is more than the orifice diameter of throttle orifice.
The cross sectional shape of micro-structural chamber in described throttle orifice is one kind in rectangle, semi-circular, triangle.
The cross sectional shape of described micro-structural groove be rectangle, del, inverted trapezoidal, it is semi-circular in one kind.
The quantitative range of described throttle orifice is six to ten.
Described micro-structural groove I, the quantitative range of micro-structural groove II are two to three ten.
Micro-structural chamber in throttle orifice of the present utility model makes the diameter of throttle orifice be continually changing in airflow direction, makes gas
Experience repeatedly expands and then strengthens throttle effect.Micro-structural groove on working face, makes air film clearance height continuous in airflow direction
Change, makes gas experience repeatedly expand and then strengthens throttle effect.
Working face in the utility model could be arranged to the working face of the groove containing micro-structural, or be not provided with micro- knot
The complete plane of flute.
Throttle orifice in the utility model could be arranged to the throttle orifice of the chamber containing micro-structural, or be not provided with micro-structural
The throttle orifice of chamber.
The utility model strengthens the throttle effect of the gentle intermembrane space of throttle orifice using the micro-structural with determination shape, from
And realize the raising of orifice restriction pressurized air thrust bearing rigidity.New construction bearing evades reduction while rigidity is improved
Throttle diameter and the manufacturing technology that air film gap band comes are difficult.
The beneficial effects of the utility model are that the rigidity of the utility model bearing and carrying are high.Structure of the present utility model
Simply, processing cost is low, process stabilizing, quality controllable.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is the partial structural diagram in the utility model；Wherein, Fig. 2 (a) is bearing top view, and Fig. 2 (b) is axle
The front view held, I-I is the enlarged drawing of the throttle orifice in Fig. 2 (b), and II-II is the micro-structural groove enlarged drawing in Fig. 2 (b)；
Fig. 3 is the throttle orifice sectional view in the utility model；
Fig. 4 be the utility model in micro-structural groove sectional view；
In figure, the bearing working face 7. of 1. thrust button, 2. air film gap, 3. bearing, 4. external boundary, 5. inner boundary 6. throttles
The micro-structural chamber of 8. micro-structural groove, I 9. aperture 10., the micro-structural groove II of 11. throttle orifice, 12. air vent 13. are justified in pore size distribution.
Embodiment
The utility model is described in further details below in conjunction with the accompanying drawings.
Embodiment 1
Fig. 1 is bearing overall structure diagram of the present utility model；Fig. 2 is the partial structurtes signal in the utility model
Figure；Wherein, Fig. 2 (a) be bearing top view, Fig. 2 (b) be bearing front view, I-I be Fig. 2 (b) in throttle orifice amplification
Figure, II-II is the micro-structural groove enlarged drawing in Fig. 2 (b)；Fig. 3 is the throttle orifice sectional view in the utility model；Fig. 4 is this reality
With the sectional view of the micro-structural groove in new.
In Fig. 1 ~ Fig. 4, pressurized air thrust bearing of the present utility model, including diameter identical thrust button 1 and bearing
3, its annexation is that thrust button 1 is located at the top of bearing 3, and thrust button 1 is set with bearing 3 to be concentric, as shown in Figure 1.Institute
On the bearing 3 stated several structure identical throttle orifices 11 are evenly arranged with along throttling pore size distribution circle 7.Described throttle orifice 11 is one
Through hole, is provided with several micro-structural chambers 10 in through-holes.The aperture 9 of the upper end of throttle orifice 11 is located on bearing working face 6, throttle orifice
11 lower ends are connected with being arranged on the air vent 12 of the bottom surface of bearing 3；The micro-structural of annular concentric is respectively arranged with bearing working face 6
Groove I 8, micro-structural groove II 13.Micro-structural groove I 8 is located at throttling pore size distribution with micro-structural groove II 13 and justifies 7 both sides.As shown in Figure 2.
The diameter of described micro-structural chamber 10 is more than the diameter of aperture 9 of throttle orifice 11.
The cross sectional shape of micro-structural chamber 10 in described throttle orifice 11 is rectangle 14, semicircle 15, in triangle 16
It is a kind of.As shown in Figure 3.
The cross sectional shape of described micro-structural groove is one in rectangle 17, del 19, inverted trapezoidal 18, semicircle 20
Kind.As shown in Figure 4.
The quantitative range of described throttle orifice 11 is six to ten.
Described micro-structural groove I 8, the quantitative range of micro-structural groove II 13 are two to three ten.
In the present embodiment, the quantitative range of throttle orifice is set to six, and throttle orifice 11 is one of them, the shape of micro-structural chamber 10
Shape is rectangle 14.
Micro-structural groove I 8, the quantity of micro-structural groove II 13 are two, and cross sectional shape is rectangle 17.
In Fig. 1, the gap between thrust button 1 and bearing 3 of the present utility model is in described air film gap, air film gap
Gas there is certain pressure to form bearing capacity, bearing capacity changes with air film gap and changes and form bearing rigidity.This reality
It is by strengthening throttle effect, so as to reach the purpose for improving rigidity with new its main function of described micro-structural.
In Fig. 2, the micro-structural chamber 10 in throttle orifice 11 makes the aperture of throttle orifice be continually changing in airflow direction, passes through gas
Go through and repeatedly expand and then strengthen throttle effect.The micro-structural groove I 8 set on bearing working face 6, positioned at working face external boundary 4 with
Between throttling pore size distribution circle 7, micro-structural groove II 13 is located at working face inner boundary 5 and throttling pore size distribution is justified between 7, makes air film gap
Height be continually changing in airflow direction, make gas experience repeatedly expand so that strengthen throttle effect.
Operation principle of the present utility model is pressed gas enters throttle orifice 11 through air vent 12, in throttle orifice 11 with it is micro-
The interaction of structure chamber 10 makes the multiple expansion of gas experience.Then, gas enters air film gap 2 by aperture 9, and gas is in gas afterwards
Justify the flowing of 5 directions to inner boundary circle 4 and external boundary in intermembrane space, in the process gas and the micro-structural on bearing working face 6
Groove interaction makes gas undergo multiple expansion again.
Embodiment 2
The present embodiment is identical with the structure of embodiment 1, except that in the present embodiment, the quantitative range of throttle orifice is set
Ten are set to, micro-structural chamber shape is semicircle 15.Micro-structural groove I 8, the quantity of micro-structural groove II 13 are 20, are cut
Face shape is inverted trapezoidal 18.
Embodiment 3：
The present embodiment is identical with the structure of embodiment 1, except that in the present embodiment, the quantitative range of throttle orifice is set
Ten are set to, micro-structural chamber shape is triangle 16.Bearing working face is the complete plane without micro-structural groove.
Embodiment 4：
The present embodiment is identical with the structure of embodiment 1, except that in the present embodiment, throttle orifice is without micro-structural
The throttle orifice of chamber.Micro-structural groove I 8, the quantity of micro-structural groove II 13 are ten, and cross sectional shape is del 19.
Claims (6)
1. a kind of pressurized air thrust bearing, it is characterised in that：Described pressurized air thrust bearing stops including diameter identical
Push-plate (1) and bearing (3), its annexation are that thrust button (1) is located at the top of bearing (3), and thrust button (1) is with bearing (3)
It is concentric to set；On described bearing (3) several structure identical throttle orifices are evenly arranged with along throttling pore size distribution circle (7)
(11)；Described throttle orifice (11) is a through hole, and several micro-structural chambers (10) are provided with through-holes；Throttle orifice (11) upper end
Aperture (9) is located on bearing working face (6), and throttle orifice (11) lower end is connected with being arranged on the air vent (12) of bearing (3) bottom surface；
Micro-structural groove I (8), the micro-structural groove II (13) of annular concentric are respectively arranged with bearing working face (6)；Micro-structural groove I (8) with
Micro-structural groove II (13) is located at throttling pore size distribution circle (7) both sides.
2. pressurized air thrust bearing according to claim 1, it is characterised in that：The diameter of described micro-structural chamber (10)
More than aperture (9) diameter of throttle orifice (11).
3. pressurized air thrust bearing according to claim 1, it is characterised in that：Micro- knot in described throttle orifice (11)
The cross sectional shape of structure chamber (10) is one kind in rectangle (14), semicircle (15), triangle (16).
4. pressurized air thrust bearing according to claim 1, it is characterised in that：The cross sectional shape of described micro-structural groove
For one kind in rectangle (17), inverted trapezoidal (18), del (19), semicircle (20).
5. pressurized air thrust bearing according to claim 1, it is characterised in that：The quantity model of described throttle orifice (11)
Enclose for six to ten.
6. pressurized air thrust bearing according to claim 1, it is characterised in that：Described micro-structural groove I (8), micro- knot
The quantitative range of flute II (13) is two to three ten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225448.2U CN206592433U (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225448.2U CN206592433U (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592433U true CN206592433U (en) | 2017-10-27 |
Family
ID=60126148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720225448.2U Expired - Fee Related CN206592433U (en) | 2017-03-09 | 2017-03-09 | A kind of pressurized air thrust bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206592433U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640971A (en) * | 2017-03-09 | 2017-05-10 | 中国工程物理研究院机械制造工艺研究所 | Hydrostatic gas thrust bearing |
| CN111237341A (en) * | 2020-03-09 | 2020-06-05 | 南京工业大学 | Gas thrust bearing with hybrid action of dynamic pressure and static pressure |
-
2017
- 2017-03-09 CN CN201720225448.2U patent/CN206592433U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640971A (en) * | 2017-03-09 | 2017-05-10 | 中国工程物理研究院机械制造工艺研究所 | Hydrostatic gas thrust bearing |
| CN111237341A (en) * | 2020-03-09 | 2020-06-05 | 南京工业大学 | Gas thrust bearing with hybrid action of dynamic pressure and static pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |