CN209430612U - A kind of ultraprecise dynamical and static pressure gas bearing arrangement - Google Patents
A kind of ultraprecise dynamical and static pressure gas bearing arrangement Download PDFInfo
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- CN209430612U CN209430612U CN201920015558.5U CN201920015558U CN209430612U CN 209430612 U CN209430612 U CN 209430612U CN 201920015558 U CN201920015558 U CN 201920015558U CN 209430612 U CN209430612 U CN 209430612U
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- dynamical
- static pressure
- pressure gas
- gas bearing
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Abstract
A kind of ultraprecise dynamical and static pressure gas bearing, the utility model relates to a kind of Ultraprecision Machining fields.The utility model is that improvement prior art skilled worker precision is low, and frictional dissipation is big, and bearing capacity is low, the problem of stability difference when running at high speed, and using dynamical and static pressure gas bearing, dynamic pressure is combined with the advantages of hydrostatic gas-lubricated bearing.The dynamical and static pressure gas bearing is hollow cylinder, hollow cylinder external surface is radially even to be distributed with air vent, and each air vent connects an air cavity, air cavity and continous way slit throttling device cooperate, air vent is communicated with air cavity, air cavity is communicated with continous way slit throttling device, and hollow cylinder inner surface is radially machined with two groups of U-type grooves, and U-type groove is symmetrically distributed in continous way slit throttling device two sides.
Description
Technical field:
The utility model relates to a kind of bearing arrangement more particularly to a kind of ultraprecise dynamical and static pressure gas technical field of bearings.
Background technique:
In ultra-precision processing system, main shaft plays the machining accuracy of part vital.Prior art main shaft
System still mostly uses the mode of hydrodynamic lubrication, and it is low with friction power loss and machining accuracy to generate a large amount of heat.But compare liquid
Bearing is lubricated, aerostatic bearing bearing capacity is low, and stability is poor when aero dynamic bearing runs at high speed.
Low to solve lathe process precision, bearing capacity is low, the problem of stability difference when running at high speed, and main shaft support uses
The advantages of dynamical and static pressure gas bearing, dynamical and static pressure gas bearing combines static pressure and hydrodynamic gas-lubricated bearing, also avoids lacking for the two
Point had both avoided bearing in the dry friction in start and stop stage, and the gas supply of continuous high-pressure needed for also avoiding bearing support both improved
Stability, and bearing capacity is enhanced, while the requirement for improving machining accuracy can be reached.
Utility model content:
The purpose of the utility model is to provide a kind of ultraprecise dynamical and static pressure gas bearing arrangement, which can effectively be mentioned
High manufacturing accuracy, stability and bearing capacity, operating friction loss is small under high revolving speed, have clean cleaning, revolution it is light and handy,
It resists cold the advantages that heat-resisting, the service life is long.
The utility model solves technical problem and adopts the technical scheme that: a kind of ultraprecise dynamical and static pressure gas bearing, in axis
Surface is held equipped with a plurality of U-type groove, by U-type groove and continous way slit simultaneous processing on bearing, and U-type groove is symmetrically distributed in
Continous way slit two sides.
Signified dynamical and static pressure gas bearing in this specification first passes through external high pressure gas in the stage that starts and stops
Air vent and air cavity are transported in continous way slit throttling device, form static pressure bearing capacity, and main shaft starts turning, and revolving speed reaches
When 5000r/min, air is pressed into the dynamic pressure effect for generating fluid in U-type groove using the revolution of axle journal, dynamic pressure is formed and carries energy
Power, while external air source stops gas supply.
The utility model has the beneficial effects that combining hydrostatic effects caused by continous way slit throttling device, there is no supply
Stomata diffusion, bearing capacity is high, and scattering effect is low, and temperature influences dynamic pressure effect caused by the advantages that small and U type groove and improves
The advantages of load capacity, high stability, reduction power consumption.
Detailed description of the invention:
Fig. 1 is the utility model overall diagram；
Fig. 2 is the utility model side view；
Fig. 3 is the sectional view of A-A in Fig. 2；
Fig. 4 is expanded view on the inside of the utility model bearing.
Specific embodiment:
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description.
Specific embodiment 1: illustrating that present embodiment, one kind described in present embodiment are super in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4
Accurate dynamical and static pressure gas bearing, the bearing are hollow cylinder, and hollow cylinder external surface is radially even to be distributed with gas supply
Hole 1, and each air vent 1 connects an air cavity 4, air cavity 4 and continous way slit throttling device 3 cooperate, table in hollow cylinder body
Face is radially machined with two groups of U-type grooves 2.
Specific embodiment 2: illustrating present embodiment in conjunction with Fig. 1, Fig. 4, a kind of ultraprecise described in present embodiment is dynamic
Hydrostatic gas-lubricated bearing, two groups of U-type grooves 2 are symmetrically distributed in 3 two sides of continous way slit throttling device, every group 10~12, U-shaped
2 0.4~0.8mm of groove depth of slot, 0.5~1.0mm of groove width, other are same as the specific embodiment one.
Specific embodiment 3: illustrating present embodiment, a kind of superfinishing described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 3
Close dynamical and static pressure gas bearing, the air vent 1 are single group air vent, are circumferentially evenly distributed with 8, air vent 1 is round logical
Hole, diameter are 0.3~0.6mm, other are same as the specific embodiment one.
Specific embodiment 4: illustrating present embodiment, one kind described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4
Ultraprecise dynamical and static pressure gas bearing, the outer diameter of the hollow cylinder are D, 50~80mm of value range of D, internal diameter d, d's
Value range is 20~50mm, and the value range of width W, W are 20~40mm, other are same as the specific embodiment one.
Specific embodiment 5: illustrating present embodiment, a kind of superfinishing described in present embodiment in conjunction with Fig. 1, Fig. 3, Fig. 4
Close dynamical and static pressure gas bearing, the continous way slit throttling device 3, cross-sectional width be 1.0~2.0mm, length be 30~
60mm, other are same as the specific embodiment one.
Specific embodiment 6: embodiment is described with reference to Fig. 3, a kind of ultraprecise dynamic and static pressure described in present embodiment
Gas bearing, it is characterised in that: the air cavity 4 be rectangle, groove width be 0.6~1.2mm, groove depth be 1.2~2.2mm, other with
Specific embodiment one is identical.
Working principle
When utility model works, high pressure gas enters air cavity by multiple air vents, and it is narrow to enter continous way by air cavity
Flow controller is stitched, generates pressure drop by the throttling action of continous way slit throttling device, the lower U-type groove that runs at high speed forms dynamic pressure, in turn
The characteristics of reaching the utility model.
Claims (6)
1. a kind of ultraprecise dynamical and static pressure gas bearing, it is characterised in that: the dynamical and static pressure gas bearing is hollow cylinder, hollow
Cylindrical outer surface is radially even to be distributed with air vent (1), and each air vent (1) connects an air cavity (4), air cavity
(4) cooperate with continous way slit throttling device (3), air vent (1) is communicated with air cavity (4), air cavity (4) and continous way slit throttling device
(3) it communicates, hollow cylinder inner surface is radially machined with two groups of U-type grooves (2), and to be symmetrically distributed in continous way narrow for U-type groove (2)
Stitch flow controller (3) two sides.
2. a kind of ultraprecise dynamical and static pressure gas bearing according to claim 1, it is characterised in that: two groups of U-type grooves
(2) it is symmetrically distributed in continous way slit throttling device (3) two sides, every group 10~12, U-type groove (2) 0.4~0.8mm of groove depth, groove width
0.5~1.0mm.
3. a kind of ultraprecise dynamical and static pressure gas bearing according to claim 1, it is characterised in that: the air vent (1) is
Single group air vent is circumferentially evenly distributed with 8, and air vent (1) is circular through hole, and diameter is 0.3~0.6mm.
4. a kind of ultraprecise dynamical and static pressure gas bearing according to claim 1, it is characterised in that: the hollow cylinder
Outer diameter is D, 50~80mm of value range of D, and the value range of internal diameter d, d are 20~50mm, the value range of width W, W
For 20~40mm.
5. a kind of ultraprecise dynamical and static pressure gas bearing according to claim 1, it is characterised in that: the continous way slit section
It flows device (3), cross-sectional width is 1.0~2.0mm, and length is 30~60mm.
6. a kind of ultraprecise dynamical and static pressure gas bearing according to claim 1, it is characterised in that: the air cavity (4) is square
Shape, groove width are 0.6~1.2mm, and groove depth is 1.2~2.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015558.5U CN209430612U (en) | 2019-01-04 | 2019-01-04 | A kind of ultraprecise dynamical and static pressure gas bearing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015558.5U CN209430612U (en) | 2019-01-04 | 2019-01-04 | A kind of ultraprecise dynamical and static pressure gas bearing arrangement |
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| CN209430612U true CN209430612U (en) | 2019-09-24 |
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| CN201920015558.5U Active CN209430612U (en) | 2019-01-04 | 2019-01-04 | A kind of ultraprecise dynamical and static pressure gas bearing arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412219A (en) * | 2019-01-04 | 2020-07-14 | 东北林业大学 | Ultra-precise dynamic and static pressure gas bearing device |
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2019
- 2019-01-04 CN CN201920015558.5U patent/CN209430612U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412219A (en) * | 2019-01-04 | 2020-07-14 | 东北林业大学 | Ultra-precise dynamic and static pressure gas bearing device |
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