CN108240479A - A kind of main shaft for sliding suspending sealing - Google Patents
A kind of main shaft for sliding suspending sealing Download PDFInfo
- Publication number
- CN108240479A CN108240479A CN201711319919.7A CN201711319919A CN108240479A CN 108240479 A CN108240479 A CN 108240479A CN 201711319919 A CN201711319919 A CN 201711319919A CN 108240479 A CN108240479 A CN 108240479A
- Authority
- CN
- China
- Prior art keywords
- main shaft
- sealing
- sliding
- sliding sleeve
- fixed seat
- 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.)
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Classifications
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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
- F16J15/40—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 invention discloses a kind of main shafts for sliding suspending sealing, including casing, it is rotatablely installed the main shaft in casing, fixed seat, rotate flying disc, sliding sleeve component and sealing ring, fixed seat is fixedly installed in casing, rotation flying disc is fixedly installed in main shaft, sliding sleeve assembly set is set in fixed seat and is in sealing state with rotating when the end face of flying disc contradicts and makes main shaft static, sealing ring is between sliding sleeve component and fixed seat, the main shaft for sliding suspending sealing is additionally provided with air flue, the end face that air flue impacts rotation flying disc by high pressure gas makes sliding sleeve component slippage, levitation gap is generated between sliding sleeve component and the end face for rotating flying disc, high pressure gas is located at formation air film in levitation gap and makes to be in sealing state during main axis.When main shaft remains static, sliding sleeve component contacts to form contact seal with rotating the end face of flying disc；When main shaft, which is in, runs at high speed state, high pressure gas, which is located at levitation gap and forms air film, realizes slip suspending sealing.
Description
Technical field
The present invention relates to digital control processing field more particularly to a kind of main shafts for sliding suspending sealing.
Background technology
Key feature of the high-speed electric main shaft as numerically-controlled machine tool, the quality of performance and the stability of performance are direct
Influence service life and the machining accuracy of lathe.For electro spindle product itself, sealing structure is a very crucial technology,
The quality of sealing performance directly decides the stabilization and service life of main shaft.Thus, electric main shaft sealing construction is ground both at home and abroad
Study carefully and never stopped.Existing sealing structure can substantially be divided into two major class, contact seal and non-contacting seal.Slow-speed of revolution master
Axis (usually less than 8000r/min) can generally use contact type sealing structure, this structure is relatively easy, sealing effect is reliable,
It is low to fabricate finished product.But for high rotating speed or the electro spindle more than rotating speed, sealing structure can all use non-contacting seal, have
Labyrinth type, air curtain sealing etc., this sealing structure is universal, easily manufactures, does not influence the normal operation of main shaft, sealing effect
Relatively preferably.
But there are following defects for existing high-speed main spindle sealing structure：
Non-contacting seal has labyrinth type, air curtain sealing etc., and this sealing structure is universal, easily manufactures, does not influence
The normal operation of main shaft, sealing effect are relatively preferable.The shortcomings that this structure, is non-contacting seal rotating part and non-rotation
There is gap in transfer part point, and gap is too small easily stuck, and the excessive sealing effect in gap is undesirable, especially air curtain sealing structure,
Gap is very easy to enter foreign matter greatly in the case where not opening air curtain, loses sealing effect.
Invention content
For overcome the deficiencies in the prior art, it is under the state of running at high speed the purpose of the present invention is to provide a kind of main shaft
Non-contacting seal, in the main shaft of the slip suspending sealing of contact seal under main shaft stationary state.
The purpose of the present invention is realized using following technical scheme：
A kind of main shaft for sliding suspending sealing, including casing, rotational installation in the main shaft of the casing, described slide suspends
The main shaft of sealing further includes fixed seat, rotation flying disc, sliding sleeve component and sealing ring, the fixed seat and is fixedly installed in the machine
Shell, the rotation flying disc are fixedly installed in the main shaft, the sliding sleeve assembly set be set in the fixed seat and with the rotation
Turn the end face conflict of flying disc and be located at the sliding sleeve component and institute in sealing state, the sealing ring when making the main shaft static
Between stating fixed seat, the main shaft for sliding suspending sealing is additionally provided with air flue, and the air flue impacts the rotation by high pressure gas
Turning the end face of flying disc makes the sliding sleeve component slippage, is generated between the sliding sleeve component and the end face of the rotation flying disc outstanding
Floating gap, the high pressure gas are located at formation air film in the levitation gap and make to be in sealing state during the main axis.
Further, the casing is equipped with the first inlet channel, and the fixed seat is equipped with the second inlet channel, the slip
It covers component and is equipped with outlet passageway, the second inlet channel both ends connect respectively with first inlet channel and the outlet passageway
It is logical to form the air flue.
Further, the sliding sleeve component includes damping plug, and the damping plug is located at the outlet passageway close to described
Rotate flying disc end face side.
Further, the main shaft for sliding suspending sealing further includes elastic component, the elastic component both ends and the fixation
Seat and the sliding sleeve component contradict.
Further, the sliding sleeve component is equipped with mounting hole, and the mounting hole is located at the fixed seat side, the bullet
Property part be partially housed in the mounting hole and from the mounting hole stretch out with the fixed seat contradict.
Further, the center line of the mounting hole is parallel with the center line of the main shaft.
Further, the elastic component is spring.
Further, the sealing ring is sheathed on the groove of the fixed seat and is stretched out from the groove.
Further, the sealing ring is Glais ring.
Compared with prior art, the fixed seat of the main shaft of present invention slip suspending sealing is fixedly installed in casing, rotates flying disc
Main shaft is fixedly installed in, sliding sleeve assembly set is set in fixed seat and makes to be in when main shaft is static with rotating the end face of flying disc and contradicting
Sealing state, for sealing ring between sliding sleeve component and fixed seat, air flue impacts the end face of rotation flying disc by high pressure gas
Make sliding sleeve component slippage, levitation gap is generated between sliding sleeve component and the end face for rotating flying disc, high pressure gas, which is located at, to suspend
Air film is formed in gap to be made to be in sealing state during main axis, when main shaft remains static, sliding sleeve component and rotation
The end face of flying disc contacts to form contact seal；When main shaft, which is in, runs at high speed state, sliding sleeve component and rotation flying disc
Levitation gap is generated between end face, high pressure gas, which is located in levitation gap, forms air film realization slip suspending sealing.
Description of the drawings
Fig. 1 is the structure diagram of a stationary state of the main shaft that the present invention slides suspending sealing；
The structure diagram of a rotary state of the main shaft of slip suspending sealing that Fig. 2 is Fig. 1；
The vertical view of a sliding sleeve component of the main shaft of slip suspending sealing that Fig. 3 is Fig. 1.
In figure：100th, the main shaft of suspending sealing is slided；10th, casing；12nd, the first inlet channel；20th, fixed seat；22nd, second
Inlet channel；30th, main shaft；40th, flying disc is rotated；50th, sliding sleeve component；52nd, mounting hole；54th, outlet passageway；56th, damping plug；
60th, elastic component；70th, sealing ring；80th, levitation gap.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it can be directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
Can be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The normally understood meaning of technical staff is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more phases
The arbitrary and all combination of the Listed Items of pass.
It please refers to Fig.1 to Fig.3, a kind of main shaft 100 for sliding suspending sealing includes casing 10, fixed seat 20, main shaft 30, rotation
Turn flying disc 40, sliding sleeve component 50, elastic component 60 and sealing ring 70.
Casing 10 is equipped with the first inlet channel 12.Fixed seat 20 is equipped with the second inlet channel 22.Sliding sleeve component 50 is equipped with
Mounting hole 52, outlet passageway 54 and damping plug 56.In one embodiment, the quantity of outlet passageway 54 and damping plug 56 is multiple,
Outlet passageway 54 is evenly spaced apart to be set to 50 end face of sliding sleeve component.Each damping plug 56 is located in outlet passageway 54.Elasticity
Part 60 is spring.Sealing ring 70 is Glais ring.
When the main shaft 100 of suspending sealing is slided in assembling, fixed seat 20 is fixedly installed in casing 10.Elastic component 60, which is located at, to be slided
In the mounting hole 52 for covering component 50, sliding sleeve component 50 is sheathed on fixed seat 20.The first inlet channel 12, the second air inlet are led at this time
Road 22 and outlet passageway 54 connect.60 both ends of elastic component contradict respectively with fixed seat 20 and sliding sleeve component 50.Rotate flying disc 40
It is fixedly installed in main shaft 30.Main shaft 30 is rotatablely installed in casing 10.The gas outlet face rotation flying disc 40 of damping plug 56.At this point,
Main shaft 30 remains static, and elastic component 60 is in compressive state, generates downward elastic force, pushes the fortune downwards of sliding sleeve component 50
It is dynamic so that the lower face of sliding sleeve component 50 and the upper surface of rotation flying disc 40 are in direct contact to form contact seal, main shaft 30
It cannot be introduced into inside main shaft 30 with extraneous isolation, surrounding foreign matter completely, play the sealing function under stationary state.
Main shaft 30 is in rotary state, and before operating, outside is passed through the compressed air of setting atmospheric pressure value, and compressed air passes through
First inlet channel 12, the second inlet channel 22 and outlet passageway 54, by damping plug 56 beat rotation flying disc 40 on, generate to
Under impact force, according to the principle of active force and reaction force, generate a reaction force in sliding sleeve component 50, sliding sleeve component
50, which are relatively fixed seat 20, slides so that generates levitation gap 80 between sliding sleeve component 50 and rotation flying disc 40.Due between suspension
The presence of gap 80, sliding sleeve component 50 are not directly contacted with rotation flying disc 40, and friction is negligible, do not influence turning for main shaft 30
It is dynamic.Meanwhile compressed air from damping plug 56 come out after spread around, formed draught head so that sliding sleeve component 50 with rotation
A floor height is formed between flying disc 40 to calm the anger film, is played the role of air curtain sealing, is realized and slide suspending sealing.
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (9)
1. a kind of main shaft for sliding suspending sealing, including casing, rotational installation in the main shaft of the casing, it is characterised in that：Institute
The main shaft for stating slip suspending sealing further includes fixed seat, rotation flying disc, sliding sleeve component and sealing ring, and the fixed seat, which is fixed, pacifies
Loaded on the casing, the rotation flying disc is fixedly installed in the main shaft, and the sliding sleeve assembly set is set in the fixed seat
And it is contradicted with the end face for rotating flying disc and is located at the slip in sealing state, the sealing ring when making the main shaft static
It covers between component and the fixed seat, the main shaft for sliding suspending sealing is additionally provided with air flue, and the air flue passes through high pressure gas
Impacting the end face of the rotation flying disc makes the sliding sleeve component slippage, the end face of the sliding sleeve component and the rotation flying disc
Between generate levitation gap, the high pressure gas, which is located in the levitation gap, to be formed when air film makes the main axis in close
Envelope state.
2. the main shaft according to claim 1 for sliding suspending sealing, it is characterised in that：The casing leads to equipped with the first air inlet
Road, the fixed seat are equipped with the second inlet channel, and the sliding sleeve component is equipped with outlet passageway, the second inlet channel both ends
It connects to form the air flue with first inlet channel and the outlet passageway respectively.
3. the main shaft according to claim 2 for sliding suspending sealing, it is characterised in that：The sliding sleeve component includes damping
Plug, the damping plug are located at the outlet passageway close to the rotation flying disc end face side.
4. the main shaft according to claim 1 for sliding suspending sealing, it is characterised in that：The main shaft for sliding suspending sealing
Elastic component is further included, the elastic component both ends are contradicted with the fixed seat and the sliding sleeve component.
5. the main shaft according to claim 4 for sliding suspending sealing, it is characterised in that：The sliding sleeve component is equipped with installation
Hole, the mounting hole are located at the fixed seat side, and the elastic component is partially housed in the mounting hole and from the mounting hole
It stretches out and is contradicted with the fixed seat.
6. the main shaft according to claim 5 for sliding suspending sealing, it is characterised in that：The center line of the mounting hole and institute
The center line for stating main shaft is parallel.
7. the main shaft according to claim 4 for sliding suspending sealing, it is characterised in that：The elastic component is spring.
8. the main shaft according to claim 1 for sliding suspending sealing, it is characterised in that：The sealing ring is sheathed on described solid
The groove of reservation is simultaneously stretched out from the groove.
9. the main shaft according to claim 8 for sliding suspending sealing, it is characterised in that：The sealing ring is Glais ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319919.7A CN108240479A (en) | 2017-12-12 | 2017-12-12 | A kind of main shaft for sliding suspending sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319919.7A CN108240479A (en) | 2017-12-12 | 2017-12-12 | A kind of main shaft for sliding suspending sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108240479A true CN108240479A (en) | 2018-07-03 |
Family
ID=62700221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711319919.7A Pending CN108240479A (en) | 2017-12-12 | 2017-12-12 | A kind of main shaft for sliding suspending sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108240479A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128383A (en) * | 2020-08-14 | 2020-12-25 | 北京北一机床股份有限公司 | Air floatation disc type rotary and axial sealing structure and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203495247U (en) * | 2013-09-25 | 2014-03-26 | 广州市昊志机电股份有限公司 | Bearing seat sealing device of air floatation high-speed electric spindle |
| CN203906802U (en) * | 2014-06-12 | 2014-10-29 | 麦科威（昆山）机械有限公司 | Main shaft sealing structure of plastic high-speed mixing machine |
| CN204213173U (en) * | 2014-09-25 | 2015-03-18 | 广州市昊志机电股份有限公司 | Air-floating main shaft New Damping plug |
| CN104533954A (en) * | 2014-12-26 | 2015-04-22 | 广州市昊志机电股份有限公司 | Double-layer air bearing |
| CN204381418U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | A kind of new-type air-floatation main shaft |
| CN107061346A (en) * | 2017-05-08 | 2017-08-18 | 东莞鸿凯工程设备有限公司 | Mechanical seal structure and circulating pump |
-
2017
- 2017-12-12 CN CN201711319919.7A patent/CN108240479A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203495247U (en) * | 2013-09-25 | 2014-03-26 | 广州市昊志机电股份有限公司 | Bearing seat sealing device of air floatation high-speed electric spindle |
| CN203906802U (en) * | 2014-06-12 | 2014-10-29 | 麦科威（昆山）机械有限公司 | Main shaft sealing structure of plastic high-speed mixing machine |
| CN204213173U (en) * | 2014-09-25 | 2015-03-18 | 广州市昊志机电股份有限公司 | Air-floating main shaft New Damping plug |
| CN104533954A (en) * | 2014-12-26 | 2015-04-22 | 广州市昊志机电股份有限公司 | Double-layer air bearing |
| CN204381418U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | A kind of new-type air-floatation main shaft |
| CN107061346A (en) * | 2017-05-08 | 2017-08-18 | 东莞鸿凯工程设备有限公司 | Mechanical seal structure and circulating pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128383A (en) * | 2020-08-14 | 2020-12-25 | 北京北一机床股份有限公司 | Air floatation disc type rotary and axial sealing structure and method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180703 |