CN205780306U - A kind of combined type static pressure air-bearing main shaft - Google Patents
A kind of combined type static pressure air-bearing main shaft Download PDFInfo
- Publication number
- CN205780306U CN205780306U CN201620750092.XU CN201620750092U CN205780306U CN 205780306 U CN205780306 U CN 205780306U CN 201620750092 U CN201620750092 U CN 201620750092U CN 205780306 U CN205780306 U CN 205780306U
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- China
- Prior art keywords
- main shaft
- bearing
- gas bearing
- small
- static pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 230000003068 static effect Effects 0.000 title claims abstract description 18
- 239000004047 hole gas Substances 0.000 claims abstract description 39
- 238000003754 machining Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
A kind of combined type static pressure air-bearing main shaft.This utility model solves the problem that existing static pressure air-bearing main shaft load-bearing rigidity is little, poor anti jamming capability, reliability are not enough.Including main shaft and bearing group, described bearing group includes sphere gas bearing and small-hole gas bearing, and described sphere gas bearing and small-hole gas bearing are sleeved on main shaft successively, and small-hole gas bearing offers some first air vents.This utility model is used for precision and ultra-precision machining field.
Description
Technical field
This utility model relates to a kind of air-floating main shaft, is specifically related to a kind of combined type static pressure air-bearing main shaft.
Background technology
Air-floating main shaft is taken as the main shaft that gas bearing supports, and has clear advantage.Its running speed being had
Hurry up, steadily, the feature such as clean, high temperature resistant make it have good adaptability.And use gas bearing as the main shaft supported also
It is widely used in precision and ultra-precision machining field owing to its running accuracy is high.Therefore, from current international research and
From the point of view of service condition, greatly developing the main shaft that gas bearing supports has been that to improve of machining accuracy and productivity ratio important prominent
Cut.
But air-floating main shaft is also had higher requirement by the increasingly extensive of application, and existing aperture hydrostatic gas-lubricated bearing props up
The features such as the poor anti jamming capability that the main shaft of support is had, axial underbraced and axial rigidity are little are govern air supporting master again
The development of axle.
Utility model content
This utility model is that existing static pressure air-bearing main shaft load-bearing rigidity is little, poor anti jamming capability, reliability in order to solve
Not enough problem, and then provide a kind of combined type static pressure air-bearing main shaft.
This utility model be the technical scheme is that by the above-mentioned technical problem of solution
A kind of combined type static pressure air-bearing main shaft, including main shaft and bearing group, described bearing group include sphere gas bearing and
Small-hole gas bearing, described sphere gas bearing and small-hole gas bearing are sleeved on main shaft successively, and small-hole gas bearing is opened
Being provided with some first air vents, described sphere gas bearing includes outer ring and inner ring, and outer ring offers some second air vents,
The cooperation face that there is gap and outer ring and inner ring between outer ring and inner ring is cambered surface.
An outer ring part for sphere gas bearing coordinates with inner ring, and another part coordinates with main shaft and another part of outer ring
Identical with the fit clearance between the fit clearance between main shaft and small-hole gas bearing and main shaft.
First air vent vertical major axis is arranged, and the second air vent tilts main-shaft axis and arranges.
First air vent is along the uniform setting of small-hole gas bearing circumferencial direction, the second air vent globally gas bearing outer ring
The uniform setting of circumferencial direction.
The quantity of the first air vent is three to five with the quantity of the second air vent.
The outside diameter of small-hole gas bearing is 60～100mm, a diameter of the 40 of main shaft～80mm.
The inner ring of spherical gas bearing and main shaft fit clearance are 5～10 μm, the outer ring of spherical gas bearing and inner ring it
Between fit clearance and small-hole gas bearing inner headed face and main shaft between fit clearance be 10～20 μm.
The outer ring of described sphere gas bearing fixes as one successively with small-hole gas bearing.
Gap is there is between outer ring and the small-hole gas bearing of described sphere gas bearing.
This utility model compared with prior art has the effect that
Being supplied in multiple air vents by external high pressure source of the gas, air-flow is at sphere gas bearing and small-hole gas bearing
Produce and support, make air-floating main shaft be able to work, use sphere gas bearing and small-hole gas bearing sharing lood, sphere gas axle
Hold with axial carrying and the feature of radially carrying.The work that sphere gas bearing carries with dynamic pressure when main shaft works
With, adding the radial direction carrying effect of small-hole gas bearing, the load-bearing rigidity of air-floating main shaft is big, axial bearing capacity is big, anti-interference energy
Power is strong and reliability is high.
Accompanying drawing explanation
Fig. 1 is that (sphere gas bearing and small-hole gas bearing are for fixing as one for schematic front view of the present utility model
Time)；
Fig. 2 is that the A-A of Fig. 1 is to cross-sectional schematic；
Fig. 3 is that schematic front view of the present utility model (exists gap between sphere gas bearing and small-hole gas bearing
Time)；
Fig. 4 is that the B-B of Fig. 1 is to cross-sectional schematic.
Detailed description of the invention
Detailed description of the invention one: combine Fig. 1～Fig. 4 and present embodiment is described, a kind of combined type static pressure of present embodiment
Air-floating main shaft, including main shaft 1 and bearing group, described bearing group includes sphere gas bearing 2 and small-hole gas bearing 3, described ball
Face gas bearing 2 and small-hole gas bearing 3 are sleeved on main shaft 1 successively, and small-hole gas bearing 3 offers some first supply
Hole 3-1, described sphere gas bearing 2 includes outer ring 2-1 and inner ring 2-2, and outer ring 2-1 offers some second air vent 2-3,
The cooperation face that there is gap and outer ring 2-1 and inner ring 2-2 between outer ring 2-1 and inner ring 2-2 is cambered surface.
Being supplied in multiple air vents by external high pressure source of the gas, air-flow is at sphere gas bearing 2 and small-hole gas bearing 3
Place produces and supports, and makes main shaft 1 be able to work, uses sphere gas bearing 2 and small-hole gas bearing 3 sharing lood, sphere gas
Bearing 2 is with axial carrying and the feature of radially carrying.First air vent 3-1 is that small-hole gas bearing 3 supplies, and makes main shaft 1
Rotating in small-hole gas bearing 3, the second air vent 2-3 is that sphere gas bearing 2 supplies, and makes the inner ring of sphere gas bearing 2
2-2 rotates between outer ring 2-1 and main shaft 1.
Detailed description of the invention two: combine Fig. 1～Fig. 4 and present embodiment is described, the outer ring 2-1 of sphere gas bearing 2 mono-
Point coordinate with inner ring 2-2, another part coordinate with main shaft 1 and fit clearance between another part of outer ring 2-1 and main shaft 1 and
Fit clearance between small-hole gas bearing 3 with main shaft 1 is identical.It is so designed that, two sections of air-film thicknesses can be kept identical, main shaft
Working stability.Other composition is identical with detailed description of the invention one with annexation.
Detailed description of the invention three: combine Fig. 1～Fig. 4 and present embodiment is described, the first air vent 3-1 tilts main shaft 1 axis
Arranging, the second air vent 2-3 vertical major 1 axis is arranged.It is so designed that, so that supply is more uniformly distributed, it is ensured that bearing holds
Carry uniformly.Other composition is identical with detailed description of the invention one or two with annexation.
Detailed description of the invention four: combine Fig. 1～Fig. 4 and present embodiment is described, the first air vent 3-1 is along small-hole gas bearing
The 3 uniform settings of circumferencial direction, the second air vent 2-3 globally uniform setting of gas bearing 2 outer ring 2-1 circumferencial direction.So set
Meter, so that loading ability of bearing is uniform.Other composition is identical with detailed description of the invention three with annexation.
Detailed description of the invention five: combine Fig. 1～Fig. 4 and present embodiment is described, the quantity of the first air vent 3-1 supplies with second
The quantity of pore 2-3 is three to five.It is so designed that, the bearing capacity of bearing can be effectively ensured.Other forms and is connected
Relation and detailed description of the invention one, two or four are identical.
Detailed description of the invention six: combine Fig. 1～Fig. 4 and illustrate that present embodiment, the outside diameter of small-hole gas bearing 3 are 60
～100mm, a diameter of the 40 of main shaft 1～80mm.Other composition is identical with detailed description of the invention five with annexation.
Detailed description of the invention seven: combine Fig. 1～Fig. 4 and present embodiment, the inner ring 2-2 of spherical gas bearing and main shaft are described
1 fit clearance is 5～10 μm, the fit clearance between the outer ring 2-1 and inner ring 2-2 of spherical gas bearing and small-hole gas bearing
Fit clearance between 3 inner headed faces and main shaft 1 is 10～20 μm.Other composition and annexation and detailed description of the invention one,
Two, four or six is identical.
Detailed description of the invention eight: combine Fig. 1 and Fig. 2 and present embodiment, the outer ring 2-1 of described sphere gas bearing 2 are described
Fix as one successively with small-hole gas bearing 3.Other composition is identical with detailed description of the invention seven with annexation.
Detailed description of the invention nine: combine Fig. 3 and Fig. 4 and present embodiment, the outer ring 2-1 of described sphere gas bearing 2 are described
And there is gap between small-hole gas bearing 3.Other composition is identical with detailed description of the invention seven with annexation.
Claims (9)
1. a combined type static pressure air-bearing main shaft, including main shaft (1) and bearing group, it is characterised in that: described bearing group includes ball
Face gas bearing (2) and small-hole gas bearing (3), described sphere gas bearing (2) is sleeved on successively with small-hole gas bearing (3)
On main shaft (1), small-hole gas bearing (3) offering some first air vents (3-1), described sphere gas bearing (2) includes
Outer ring (2-1) and inner ring (2-2), outer ring (2-1) offers some second air vents (2-3), outer ring (2-1) and inner ring (2-
2) the cooperation face that there is gap and outer ring (2-1) and inner ring (2-2) between is cambered surface.
A kind of combined type static pressure air-bearing main shaft the most according to claim 1, it is characterised in that: sphere gas bearing (2)
Outer ring (2-1) part coordinates with inner ring (2-2), and another part coordinates with main shaft (1) and the another part of outer ring (2-1) and master
The fit clearance between fit clearance and small-hole gas bearing (3) with main shaft (1) between axle (1) is identical.
A kind of combined type static pressure air-bearing main shaft the most according to claim 1 and 2, it is characterised in that: the first air vent (3-1)
Tilting main shaft (1) axis to arrange, the second air vent (2-3) vertical major (1) axis is arranged.
A kind of combined type static pressure air-bearing main shaft the most according to claim 3, it is characterised in that: the first air vent (3-1) edge
The uniform setting of small-hole gas bearing (3) circumferencial direction, the second air vent (2-3) globally gas bearing (2) outer ring (2-1) circumference
The uniform setting in direction.
5. according to a kind of combined type static pressure air-bearing main shaft described in claim 1,2 or 4, it is characterised in that: the first air vent (3-
1) quantity is three to five with the quantity of the second air vent (2-3).
A kind of combined type static pressure air-bearing main shaft the most according to claim 5, it is characterised in that: small-hole gas bearing (3)
Outside diameter is 60～100mm, a diameter of the 40～80mm of main shaft (1).
7. according to a kind of combined type static pressure air-bearing main shaft described in claim 1,2,4 or 6, it is characterised in that: spherical gas axle
The inner ring (2-2) held and main shaft (1) fit clearance are 5～10 μm, the outer ring (2-1) of spherical gas bearing and inner ring (2-2) it
Between fit clearance and small-hole gas bearing (3) inner headed face and main shaft (1) between fit clearance be 10～20 μm.
A kind of combined type static pressure air-bearing main shaft the most according to claim 7, it is characterised in that: described sphere gas bearing
(2) outer ring (2-1) fixes as one successively with small-hole gas bearing (3).
A kind of combined type static pressure air-bearing main shaft the most according to claim 7, it is characterised in that: described sphere gas bearing
(2) there is gap between outer ring (2-1) and small-hole gas bearing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620750092.XU CN205780306U (en) | 2016-07-15 | 2016-07-15 | A kind of combined type static pressure air-bearing main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620750092.XU CN205780306U (en) | 2016-07-15 | 2016-07-15 | A kind of combined type static pressure air-bearing main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205780306U true CN205780306U (en) | 2016-12-07 |
Family
ID=58122484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620750092.XU Expired - Fee Related CN205780306U (en) | 2016-07-15 | 2016-07-15 | A kind of combined type static pressure air-bearing main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205780306U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294330A (en) * | 2021-12-30 | 2022-04-08 | 哈尔滨工业大学 | High-precision rotating ring-shaped part inner supporting air-floating type static balancing device |
-
2016
- 2016-07-15 CN CN201620750092.XU patent/CN205780306U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294330A (en) * | 2021-12-30 | 2022-04-08 | 哈尔滨工业大学 | High-precision rotating ring-shaped part inner supporting air-floating type static balancing device |
| CN114294330B (en) * | 2021-12-30 | 2022-09-23 | 哈尔滨工业大学 | High-precision rotating ring-shaped part inner supporting air-floating type static balancing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |