CN208613762U - A kind of microflute hole dynamic and static pressure air-floating main shaft - Google Patents
A kind of microflute hole dynamic and static pressure air-floating main shaft Download PDFInfo
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- CN208613762U CN208613762U CN201821155004.7U CN201821155004U CN208613762U CN 208613762 U CN208613762 U CN 208613762U CN 201821155004 U CN201821155004 U CN 201821155004U CN 208613762 U CN208613762 U CN 208613762U
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- microflute
- static pressure
- main shaft
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Abstract
The utility model relates to a kind of microflute hole dynamic and static pressure air-floating main shafts, are mainly made of main shaft and microflute hole dynamical and static pressure gas bearing.The outerface of spindle circumferentially uniformly processes several chevron-notch.Microflute hole dynamical and static pressure gas bearing is hollow cylinder, hollow cylinder external surface, which is evenly distributed, is machined with multiple air vents, hollow cylinder external surface uniformly processes double air vent along axial direction, and each air vent cooperates with flow controller, flow controller is made of throttling pore, round balancing slit, and throttling pore and air vent communicate, throttling pore and round balancing slit communicate, each air vent, throttling pore and round balancing slit are coaxial, and axial line passes through the axis of cylindrical body, and orthogonal.Multiple air vents are connected along microflute hole dynamical and static pressure gas bearing inner surface circumferential direction opened round slot on round balancing slit, then are connected to double air vent along microflute hole dynamical and static pressure gas bearing inner surface axial direction opened round slot.
Description
Technical field:
The utility model relates to a kind of microflute hole dynamic and static pressure air-floating main shafts, and in particular to a kind of microflute hole dynamic and static pressure air bearing master
Axis.
Background technique:
With the development of Precision and Ultra-precision Machining technology, accurate and ultra-precision machine tool is increasingly taken seriously.Lathe master
Axis precision directly affects Workpiece Machining Accuracy, and main shaft is the core component that ultra-precision machine tool guarantees machining accuracy, therefore it is required that tool
There is higher running accuracy.Since gas bearing has many advantages, such as that machining accuracy is high, good without friction, controllability, in superfinishing
On close machine-tool spindle system using more and more.
It the advantages of dynamical and static pressure gas bearings synthesis hydrodynamic gas-lubricated bearing and hydrostatic gas-lubricated bearing, had both been able to satisfy under low speed
Static support needs, and adapts to the lower ability for keeping steady operation of high speed.It can keep good from zero speed to high revolving speed
Gas film stiffness and bearing capacity.Dynamical and static pressure gas bearing is strong with its anti-overload ability, stability is good, to the sensitivity of load variation
The advantages such as property is low, are widely used on the machine tool chief axis of high speed and precision.In addition, dynamical and static pressure gas bearing safety is preferable, such as
Fruit gas supply interrupts or is obstructed, and can use the dynamic pressure effect in dynamical and static pressure gas bearing to carry.So dynamical and static pressure gas axis
It holds and is widely applied in industrial circle.
Utility model content:
The utility model is in order to solve dynamical and static pressure gas bearing load carrying capacity, rigidity, stability and gas source in the prior art
Etc. existing for shortcoming, and then propose a kind of microflute hole dynamic and static pressure air-floating main shaft.
The utility model takes the technical solution to be to solve the above-mentioned problems: a kind of microflute hole dynamic and static pressure air-floating main shaft, packet
Include main shaft and microflute hole dynamical and static pressure gas bearing, it is characterised in that: several people are distributed along the circumference on the outerface of spindle
Word slot, the microflute hole dynamical and static pressure gas bearing be hollow cylinder, hollow cylinder external surface be evenly distributed be machined with it is more
A air vent, hollow cylinder external surface uniformly process double air vent along axial direction, and each air vent cooperates with flow controller,
Flow controller is made of throttling pore, round balancing slit, and throttling pore and air vent communicate, throttling pore and round balancing slit phase
Logical, each air vent, throttling pore and round balancing slit are coaxial, and axial line passes through the axis of cylindrical body, and orthogonal, in circle
Multiple air vents are connected along microflute hole dynamical and static pressure gas bearing inner surface circumferential direction opened round slot on shape balancing slit, then dynamic along microflute hole
Double air vent is connected to by hydrostatic gas-lubricated bearing inner surface axial opened round slot.
The utility model has the advantages that the utility model be by kinetic pressure gas bearing structure and hydrostatic gas-lubricated bearing structure into
Row combination cooperates with lubricating bearing mechanism in conjunction with dynamical and static pressure gas bearing.Several chevron-notch, the distribution of chevron-notch pressure are provided on main shaft
Be not it is linear, the variation of general indention carry dynamical and static pressure gas bearing can in all directions, to improve sound
Press the bearing capacity and stability of gas bearing.Air vent cooperates with flow controller, and flow controller is equal by throttling pore and circle
Indent composition, throttling pore combine the hydrostatic pressure effect that round balancing slit carries out second throttle.Before main shaft starting, it will compress
Gas imports bearing clearance by air vent, throttling pore, round balancing slit, generates static pressure bearing capacity；After main shaft starting, benefit
With the dynamic pressure effect under high revolving speed, dynamic pressure bearing capacity is formed, the two provides air film power jointly for dynamical and static pressure gas bearing.This is practical
Novel is dynamical and static pressure gas bearing lubrication, has bearing capacity high, and rigidity is big, and stability is good when high speed, shutdown process without touch mill,
The features such as low energy consumption.
Detailed description of the invention:
Fig. 1 is the utility model overall structure cross-sectional view；
Fig. 2 is the cross-sectional view of A-A in Fig. 1；
Fig. 3 is the bearing overall structure main view of the utility model；
Fig. 4 is the cross-sectional view of B-B in Fig. 3；
Fig. 5 is the main shaft overall structure main view of the utility model；
Fig. 6 is the cross-sectional view of C-C in Fig. 5.
Specific embodiment:
Specific embodiment 1: illustrating present embodiment, present embodiment institute in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6
State a kind of microflute hole dynamic and static pressure air-floating main shaft, including main shaft (1) and microflute hole dynamical and static pressure gas bearing (2).The main shaft (1)
It is distributed along the circumference on outer surface several chevron-notch (3), the microflute hole dynamical and static pressure gas bearing (2) is hollow cylinder, empty
Heart cylindrical outer surface, which is evenly distributed, to be machined with multiple air vents (4), and it is double that hollow cylinder external surface is evenly distributed processing
It arranges air vent (4), each air vent (4) cooperates with flow controller, and flow controller is by throttling pore (5-1), round balancing slit (5-
2) it forms, throttling pore (5-1) and air vent (4) communicate, and throttling pore (5-1) and round balancing slit (5-2) communicate, each
Air vent (4), throttling pore (5-1) and round balancing slit (5-2) are all coaxial, and axial line passes through the axis of cylindrical body, and just
It hands over, connects multiple air vents along microflute hole dynamical and static pressure gas bearing inner surface circumferential direction opened round slot (6) on round balancing slit, then
Double air vent is connected to along microflute hole dynamical and static pressure gas bearing inner surface axial direction opened round slot (7).
Specific embodiment 2: illustrating that present embodiment, one kind described in present embodiment are micro- in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4
Slot dynamic and static pressure air-floating main shaft, the microflute hole dynamical and static pressure gas bearing (2) are hollow cylinder, the outer diameter D of hollow cylinder
Value range be 60-80mm, the value range of width L is 60-80mm, the diameter D of main shaft (1)1Value range be 40-
60mm, the fit clearance between microflute hole dynamical and static pressure gas bearing (2) and main shaft (1) are 10-20 μm.Other and specific embodiment party
Formula one is identical.
Specific embodiment 3: illustrating that present embodiment, one kind described in present embodiment are micro- in conjunction with Fig. 1, Fig. 2, Fig. 5, Fig. 6
Slot dynamic and static pressure air-floating main shaft, the number of the chevron-notch (3) are 14-20, and the value range of groove depth h is 0.1-0.6mm, slot
The value range of wide b is 0.2-0.7mm, and the value range of groove angle β is
10 ° -20 °, the both ends distance of chevron-notch (3) is 52-58mm, sets knuckle 0.1mm at bottom margin.So set
It sets, it is ensured that bearing vibration resistance and stationarity.
Specific embodiment 4: illustrating present embodiment, a kind of microflute hole described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 4
Dynamic and static pressure air-floating main shaft, the air vent (4) are double air vent, and the number of every row is 6,8,10,12.So set, really
The uniformity of bearing gas supply is protected, other are same as the specific embodiment one.
Specific embodiment 5: illustrating present embodiment, a kind of microflute hole described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 4
Dynamic and static pressure air-floating main shaft, the air vent (4) are circular through hole, and the diameter of circular through hole is 2-4mm.It is arranged such, it is ensured that axis
The stability and reliability of gas supply are held, other are same as the specific embodiment one.
Specific embodiment 6: illustrating present embodiment, a kind of microflute hole described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 4
Dynamic and static pressure air-floating main shaft, the throttling pore (5-1) in the flow controller are circular through hole, and the diameter of circular through hole is d0Value
Range is 0.2-1.0mm.It is arranged such, it is ensured that bearing has preferable bearing capacity and stability, other and specific embodiment party
Formula one is identical.
Specific embodiment 7: illustrating present embodiment, a kind of microflute hole described in present embodiment in conjunction with Fig. 1, Fig. 2, Fig. 4
Dynamic and static pressure air-floating main shaft, round balancing slit one end (5-2) in the flow controller are intersected with throttling pore (5-1), and the other end is
Circular through hole, the diameter of circular through hole are 1.5-3mm.It being arranged such, it is ensured that bearing has preferable bearing capacity and stability,
Other are same as the specific embodiment one.
Working principle.
When utility model works, under low speed, high-pressure air source is provided to multiple groups air vent respectively by external high pressure gas source,
High pressure draught pass sequentially through air vent (4), throttling pore (5-1), round balancing slit (5-2) to the axis being mounted in bearing into
Gas dynamic pressure effect can be better achieved in row hydrostatic bearing lubrication, the herringbone slot structure to run at high speed, and high-pressure air source does not supply
The characteristics of to save air consumption, reach the utility model.
Claims (7)
1. a kind of microflute hole dynamic and static pressure air-floating main shaft, including main shaft (1) and microflute hole dynamical and static pressure gas bearing (2), feature exists
In: it is distributed along the circumference with several chevron-notch (3) on described main shaft (1) outer surface, the microflute hole dynamical and static pressure gas bearing (2)
For hollow cylinder, hollow cylinder external surface, which is evenly distributed, is machined with air vent (4), and hollow cylinder external surface is circumferentially
It uniformly processes double air vent (4), each air vent (4) cooperates with flow controller, and flow controller is by throttling pore (5-1), circle
Shape balancing slit (5-2) composition, throttling pore (5-1) and air vent (4) communicate, throttling pore (5-1) and round balancing slit (5-2)
It communicates, each air vent (4), throttling pore (5-1) and round balancing slit (5-2) are coaxial, and axial line passes through cylindrical body
Axis, and it is orthogonal, it is multiple along microflute hole dynamical and static pressure gas bearing inner surface circumferential direction opened round slot (6) connection on round balancing slit
Air vent, then be connected to double air vent along microflute hole dynamical and static pressure gas bearing inner surface axial direction opened round slot (7).
2. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the microflute hole sound
Pressing gas bearing (2) is hollow cylinder, and the value range of hollow cylinder outer diameter D is 60-80mm, the value range of width L
For 60-80mm, main shaft (1) diameter D1Value range be 40-60mm, microflute hole dynamical and static pressure gas bearing (2) and main shaft (1) it
Between fit clearance be 10-20 μm.
3. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the chevron-notch (3)
Number is 14-20, and the value range of groove depth h is 0.1-0.6mm, and the value range of groove width b is 0.2-0.7mm, the value of groove angle β
Range is 10 ° -20 °, and the both ends distance of chevron-notch (3) is 52-58mm, sets knuckle 0.1mm at bottom margin.
4. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the air vent (4) is
Double air vent, the number of every row are 6,8,10,12.
5. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the air vent (4) is
Circular through hole, the diameter of circular through hole are 2-4mm.
6. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the section in the flow controller
Flowing aperture (5-1) is circular through hole, and the diameter of circular through hole is 0.2-1.0mm.
7. a kind of microflute hole dynamic and static pressure air-floating main shaft according to claim 1, it is characterised in that: the circle in the flow controller
Shape balancing slit one end (5-2) is intersected with throttling pore (5-1), and the other end is circular through hole, and the diameter of circular through hole is 1.5-
3mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821155004.7U CN208613762U (en) | 2018-07-20 | 2018-07-20 | A kind of microflute hole dynamic and static pressure air-floating main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821155004.7U CN208613762U (en) | 2018-07-20 | 2018-07-20 | A kind of microflute hole dynamic and static pressure air-floating main shaft |
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| Publication Number | Publication Date |
|---|---|
| CN208613762U true CN208613762U (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821155004.7U Active CN208613762U (en) | 2018-07-20 | 2018-07-20 | A kind of microflute hole dynamic and static pressure air-floating main shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732687A (en) * | 2018-07-20 | 2020-01-31 | 东北林业大学 | micro-groove hole dynamic and static pressure air-float main shaft |
| CN110894854A (en) * | 2019-09-25 | 2020-03-20 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
-
2018
- 2018-07-20 CN CN201821155004.7U patent/CN208613762U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732687A (en) * | 2018-07-20 | 2020-01-31 | 东北林业大学 | micro-groove hole dynamic and static pressure air-float main shaft |
| CN110894854A (en) * | 2019-09-25 | 2020-03-20 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
| CN110894854B (en) * | 2019-09-25 | 2021-06-04 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
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