CN107906123A - A kind of bar air supporting support and sealing structure - Google Patents
A kind of bar air supporting support and sealing structure Download PDFInfo
- Publication number
- CN107906123A CN107906123A CN201711312061.1A CN201711312061A CN107906123A CN 107906123 A CN107906123 A CN 107906123A CN 201711312061 A CN201711312061 A CN 201711312061A CN 107906123 A CN107906123 A CN 107906123A
- Authority
- CN
- China
- Prior art keywords
- inner sleeve
- bar
- air supporting
- pedestal
- supporting support
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/24—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with radially or tangentially compressed packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to a kind of bar air supporting support and sealing structure, including the pedestal for fixing seal component, installed in pedestal internal diameter and the inner sleeve that can be axially moveable, for stirring the driving lever of inner sleeve movement, the limiting plate of limitation inner sleeve shift position；Bar connector sleeve is inserted with the inner sleeve, has gap between the bar connector sleeve and inner sleeve, there is inner sleeve exterior seal ring between the inner sleeve and pedestal.The bar air supporting support of the present invention and sealing structure, by the way of radial seal, its is easy to operate, it is easy to accomplish automatically controls, which, without active force, will not make driving device damage to driving device.
Description
Technical field
The invention belongs to 3D printing technique field, is related to powder manufacturing apparatus, especially a kind of bar air supporting support and sealing knot
Structure.
Background technology
In the prior art, the preparation method of metal dust has Mechanical Method, chemical method, gas atomization, centrifugal atomization, gold
Belong to thermal reduction, electrolysis etc..The metal dust that rotary electrode method produces is used in centrifugal atomization to be spherical, compact structure,
Narrow particle size distribution, is current 3D printing metal dust applied to parts relative density height, the good mechanical property of 3D printing
Main preparation method.
The processing technology that rotary electrode method produces metal dust is that metal bar is placed in the atomization chamber full of inert gas
In, such as argon gas, helium, melting is carried out to it by electron beam, electric arc etc., while metal bar rotates at a high speed, utilizes centrifugation
Power is atomized molten metal, and the spherical metal powder of high-purity is can obtain after condensation.
The metal dust of high-purity in order to obtain, prevents metal bar to be contaminated in high-temperature fusion, to atomization chamber
Need, by the evacuating air in atomization chamber, inert gas to be poured again after reaching requirement before filling with inert gas.On the one hand due to producing
Metal bar stretches into atomization chamber and rotates at a high speed during metal dust, and gap has been needed between metal bar and atomization chamber, and is vacuumizing
During need to seal herein, to ensure that certain vacuum can be reached in atomization chamber.
On the other hand since metal bar constantly consumes powder is atomized into, metal bar is high-speed rotating while need axial direction
Feeding.And metal bar overhangs longer when processing, circumference is uneven during atomized molten, causes rotatable parts uneven, causes to set
Standby vibration is big.Rotating speed is difficult to improve, so as to influence the quality and production efficiency of metal dust.
On sealing structure, the prior art is sealed using axial end face, is sealed when vacuumizing by screw thread axial compression,
Unclamped when charging indifferent gas system powder.The shortcomings that this axial end face sealing, there is at following 2 points：
1) there is axial force to bar driving device, and the size of power is not easy to grasp, and easily the bearing of driving device is caused
Damage.
2) since using engagement thread, need to rotate a circle the above, complicated, be not easy to realize automated control.
On supporting structure, the prior art is usually to add an Auxiliary support, between rolling bearing or bushing, with metal bar
Gap is left, gap size is difficult to determine, gap is excessive, does not have supporting role, since bar end is constantly in molten
State, temperature is very high, and the too small metal bar in gap and Auxiliary support easily bond.Due to the presence in gap, bar is in feeding process
In easily bring control into atomization chamber, be contaminated metal dust.
The content of the invention
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art, there is provided a kind of bar air supporting support and sealing knot
Structure, it uses air-flotation type support and radial seal structure, easy to operate, it is easy to accomplish automatically controls, and to driving device without work
Firmly.
The purpose of the present invention is by the following technical programs to solve：
This bar air supporting support and sealing structure, including the cylindric pedestal being fixed on atomization chamber side wall, are installed on
Pedestal internal diameter and the inner sleeve that can be axially moveable, for stirring the driving lever of inner sleeve movement, limit the spacing of inner sleeve shift position
Plate；Bar connector sleeve is inserted with the inner sleeve, has gap between the bar connector sleeve and inner sleeve；In the side wall of the pedestal
Compressed gas passage axially is offered, the annular groove that multiple tracks is parallel to each other is offered on the pedestal, per pass annular groove bottom is circumferentially
Multiple micropores are distributed, the gas outlet of the micropore sprays to bar connector sleeve periphery wall and forms air supporting support.
Further, on the periphery wall of the inner sleeve, inner sleeve exterior seal ring is equipped between inner sleeve and pedestal；The inner sleeve
Periphery wall on offered in the position of installation inner sleeve exterior seal ring to the groove of fixed inner sleeve exterior seal ring.
Further, an inner sleeve exterior seal ring is respectively provided with the both ends periphery wall of above-mentioned inner sleeve.
Further, above-mentioned limiting plate is arranged on the right end of inner sleeve, is offered on limiting plate for driving lever sliding slot in axial sliding.
Further, said base one end is installed in bar driving device and coaxial with bar, the other end and mist of pedestal
Change chamber connection.
Further, above-mentioned bar connector sleeve is ledge structure, the axial movement of inner sleeve can be converted to radial seal.
Further, the outside diameter of above-mentioned inner sleeve is equipped with the inner sleeve outer rubber for being sleeved in guarantee and being in sealing state in slip all the time
Sealing ring.
Further, above-mentioned inner sleeve and bar connector sleeve are clearance fit, and the gap between inner sleeve and bar connector sleeve is more than
Gap between inner sleeve and pedestal.
Further, the right side of above-mentioned inner sleeve is equipped with the inner sleeve inner seal ring that sealing is realized with bar connector sleeve.
The invention has the advantages that：
The bar air supporting support of the present invention and sealing structure, using air supporting brace type structure, and combine the side of radial seal
Formula, its is easy to operate, it is easy to accomplish automatically controls, which, without active force, will not make driving device damage to driving device
It is bad.
Brief description of the drawings
Fig. 1 is view of the present invention when atomization chamber extracts vacuum；
Fig. 2 is view of the present invention when producing metal dust；
Fig. 3 is the present invention and the sectional view of metal bar 5.1.
In figure：1- atomization chambers；2- inner sleeve exterior seal rings；3- inner sleeves；4- pedestals；5- bar connector sleeves；6- inner sleeve interior sealings
Circle；7- driving levers；8- limiting plates；9- bar driving devices.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1 to Fig. 3：The bar air supporting support of the present invention and sealing structure, including be fixed on 1 side wall of atomization chamber
Cylindric pedestal 4, installed in 4 internal diameter of pedestal and the inner sleeve 3 that can be axially moveable, for stirring the driving lever 7 of the movement of inner sleeve 3,
Limit the limiting plate 8 of 3 shift position of inner sleeve；It is inserted with bar connector sleeve 5 in the inner sleeve 3, the bar connector sleeve 5 and interior
There is gap between set 3；Compressed gas passage 10 is axially offered in the side wall of the pedestal 4, is offered on the pedestal 4 more
The annular groove that road is parallel to each other, the circumferentially multiple micropores 11 in per pass annular groove bottom, the gas outlet of the micropore 11 sprays to bar
5 periphery wall of connector sleeve forms air supporting support.On the periphery wall of inner sleeve 3, inner sleeve external seal is equipped between inner sleeve 3 and pedestal 4
Circle 2；Offered on the periphery wall of the inner sleeve 3 in the position of installation inner sleeve exterior seal ring 2 to fixed inner sleeve exterior seal ring 2
Groove.
In highly preferred embodiment of the present invention, an inner sleeve exterior seal ring 2 is respectively provided with the both ends periphery wall of inner sleeve 3.Limit
Position plate 8 is arranged on the right end of inner sleeve 3, is offered on limiting plate 8 for the sliding slot in axial sliding of driving lever 7.4 one end of pedestal is installed on rod
In material driving device 9 and coaxial with bar, the other end and atomization chamber 1 of pedestal 4 connect.Bar connector sleeve 5 is ledge structure, energy
It is enough that the axial movement of inner sleeve 3 is converted into radial seal.The outside diameter of inner sleeve 3, which is equipped with, ensures inner sleeve 3 in slip all the time in close
The inner sleeve outer rubber sealing ring 2 of envelope state.Inner sleeve 3 and bar connector sleeve 5 are clearance fit, inner sleeve 3 and bar connector sleeve 5 it
Between gap be more than gap between inner sleeve 5 and pedestal 4.The right side of inner sleeve 3 is equipped with the inner sleeve that sealing is realized with bar connector sleeve 5
Inner seal ring 6.
The course of work of the present invention is as follows：
Such as Fig. 1, when atomization chamber 1 extracts vacuum, driving lever 7 drives inner sleeve 3 to slide to the right, the inner sleeve interior sealing in inner sleeve 3
Circle 6 is contacted with the outer diameter of step of bar connector sleeve 5, realizes sealing；And the internal diameter of the inner sleeve exterior seal ring 2 in inner sleeve 3 and pedestal 4
Contact sealing.Enter atomization chamber so as to completely cut off outside air, ensure that in atomization chamber certain vacuum can be reached.
After vacuum reaches requirement in atomization chamber, start to be filled with inert gas into atomization chamber, allow inertia in atomization chamber
Gas pressure reaches after requirement (micro-positive pressure), equipment preparation.With reference to Fig. 2, driving lever 7 drives inner sleeve 3 to slide to the left, inner sleeve 3
On the outer diameter of step of inner sleeve inner seal ring 6 and bar connector sleeve 5 disengage, inner sleeve 3 and 5 outer ring of bar connector sleeve do not contact,
Compressed gas source is accessed to compressed gas passage 10, compressed gas enters pedestal 4 by compressed gas passage 10, passes through
Stomata enters inner sleeve 3, has multiple tracks annular groove in inner sleeve 3, the circumferentially multiple micropores 11 in each annular groove bottom, compressed gas is final
Sprayed by micropore 11 so that compressed air is full of the gap between inner sleeve 3 and bar connector sleeve 5.Since compressed air pressure is high,
When metal bar 5.1 is amesiality, pressure increase herein, increases the active force of bar connector sleeve 5, and the pressure of opposite side
Power reduces, and active force also reduces, so that 5.1 fitting center position of metal bar, improves the stability and rotating speed of rotatable parts.
Since the gas phase in compressed gas and atomization chamber 1 is same, and pressure is higher than atomization chamber 1 and atmospheric pressure, and compressed gas can continue not
Atomization chamber 1 on the left of disconnected entrance, so that the air for obstructing the external world enters atomization chamber 1, prevents that being mixed into air in atomization chamber 1 causes
Metal dust pollutes, impurity increase.And it is at this time micro-positive pressure in atomization chamber, bar driving device can drive bar connector sleeve 5
The bar being installed on bar connector sleeve 5 is driven to rotate at a high speed again, processing prepares metal dust.
In conclusion the present invention realizes radial seal, this sealing by new bar sealing structure by axial movement
Mode switches simply, can be realized and automatically controlled with cylinder, and effectively protect bar to drive without axial force bar driving device
Device.
Claims (9)
1. a kind of bar air supporting support and sealing structure, it is characterised in that including the cylindrical shape being fixed on atomization chamber (1) side wall
Pedestal (4), installed in pedestal (4) internal diameter and the inner sleeve (3) that can be axially moveable, the driving lever mobile for stirring inner sleeve (3)
(7), the limiting plate (8) of inner sleeve (3) shift position is limited；Bar connector sleeve (5), the bar are inserted with the inner sleeve (3)
There is gap between connector sleeve (5) and inner sleeve (3)；Compressed gas passage (10), institute are axially offered in the side wall of the pedestal (4)
State and the annular groove that multiple tracks is parallel to each other is offered on pedestal (4), the circumferentially multiple micropores (11) in per pass annular groove bottom are described micro-
The gas outlet in hole (11) sprays to bar connector sleeve (5) periphery wall and forms air supporting support.
2. bar air supporting support according to claim 1 and sealing structure, it is characterised in that in the outer of the inner sleeve (3)
On perisporium, inner sleeve exterior seal ring (2) is equipped between inner sleeve (3) and pedestal (4)；In installation on the periphery wall of the inner sleeve (3)
The position of inner sleeve exterior seal ring (2) is offered to the groove of fixed inner sleeve exterior seal ring (2).
3. bar air supporting support according to claim 2 and sealing structure, it is characterised in that the both ends of the inner sleeve (3)
An inner sleeve exterior seal ring (2) is respectively provided with portion's periphery wall.
4. bar air supporting support according to claim 1 and sealing structure, it is characterised in that the limiting plate (8) is set
Right end in inner sleeve (3), offers on limiting plate (8) for driving lever (7) sliding slot in axial sliding.
5. bar air supporting support according to claim 1 and sealing structure, it is characterised in that pedestal (4) one end peace
Loaded in bar driving device (9) and coaxial with bar, the other end and atomization chamber (1) connection of pedestal (4).
6. bar air supporting support according to claim 1 and sealing structure, it is characterised in that the bar connector sleeve (5)
For ledge structure, the axial movement of inner sleeve (3) can be converted to radial seal.
7. bar air supporting support according to claim 1 and sealing structure, it is characterised in that the outside diameter of the inner sleeve (3)
It is in the inner sleeve outer rubber sealing ring (2) of sealing state all the time in slip equipped with guarantee inner sleeve (3).
8. bar air supporting support according to claim 1 and sealing structure, it is characterised in that the inner sleeve (3) and bar
Connector sleeve (5) is clearance fit, and the gap between inner sleeve (3) and bar connector sleeve (5) is more than between inner sleeve (5) and pedestal (4)
Gap.
9. bar air supporting support according to claim 1 and sealing structure, it is characterised in that the right side of the inner sleeve (3)
Equipped with the inner sleeve inner seal ring (6) that sealing is realized with bar connector sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312061.1A CN107906123A (en) | 2017-12-12 | 2017-12-12 | A kind of bar air supporting support and sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312061.1A CN107906123A (en) | 2017-12-12 | 2017-12-12 | A kind of bar air supporting support and sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107906123A true CN107906123A (en) | 2018-04-13 |
Family
ID=61865148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711312061.1A Pending CN107906123A (en) | 2017-12-12 | 2017-12-12 | A kind of bar air supporting support and sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107906123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973661A (en) * | 2019-04-13 | 2019-07-05 | 江西理工大学南昌校区 | A kind of four-degree-of-freedom high-low temperature chamber, which is vertically arranged, wears case axis gas-tight sealing |
| CN110280775A (en) * | 2019-06-19 | 2019-09-27 | 深圳精匠云创科技有限公司 | Floating seal arrangement and rotation fuel pulverizing plant with the floating seal arrangement |
| 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 |
-
2017
- 2017-12-12 CN CN201711312061.1A patent/CN107906123A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973661A (en) * | 2019-04-13 | 2019-07-05 | 江西理工大学南昌校区 | A kind of four-degree-of-freedom high-low temperature chamber, which is vertically arranged, wears case axis gas-tight sealing |
| CN110280775A (en) * | 2019-06-19 | 2019-09-27 | 深圳精匠云创科技有限公司 | Floating seal arrangement and rotation fuel pulverizing plant with the floating seal arrangement |
| 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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