CN106481923A - A kind of high-speed joint - Google Patents
A kind of high-speed joint Download PDFInfo
- Publication number
- CN106481923A CN106481923A CN201611075082.1A CN201611075082A CN106481923A CN 106481923 A CN106481923 A CN 106481923A CN 201611075082 A CN201611075082 A CN 201611075082A CN 106481923 A CN106481923 A CN 106481923A
- Authority
- CN
- China
- Prior art keywords
- cannelure
- air inlet
- seal shaft
- gas outlet
- dynamic pressure
- 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
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Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/06—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies of the multiline swivel type, e.g. comprising a plurality of axially mounted modules
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention belongs to industrial processes high speed rotatory sealing field, be specifically related to a kind of high-speed joint, including seal shaft and be arranged on upper bearing (metal) on this seal shaft and lower bearing it is characterised in that：The outer wall of the axle portion of described seal shaft is provided with the dynamic pressure groove for forming dynamic pressure firmness and the cannelure for ventilation, is provided with the gas outlet connecting with this cannelure in seal shaft；Described seal shaft is inserted in sealing shroud, and described sealing shroud is provided with the air inlet connecting with cannelure.Present invention is particularly suitable for high-revolving rotary seal structure, not only breach the bottleneck that conventional rotatory sealing is subject to rate limitation, and rotary shaft rotating speed is higher, sealing then can be better.This structure is simple, and reliability is high, need not change sealing ring, non-maintaining, and can achieve many gas circuit sealings.
Description
Technical field
The invention belongs to industrial processes high speed rotatory sealing field, it is specifically related to a kind of high-speed joint.
Background technology
On pneumatic equipment, numerical control machining center, often the demand of oriented high-speed rotating equipment pumped (conveying) medium, at present, general
The general rotating seal ring of logical rotatory sealing and rotation axis seal.But this be sealed with a technical bottleneck it is simply that rotary shaft relatively
Linear velocity in sealing ring contact surface not can exceed that certain numerical value.If it exceeds marginal value, long-play will make sealing
Circle Fast Wearing was lost efficacy or so that sealing ring and the contact surface melting deformation of rotary shaft was lost efficacy.Therefore, make
Do not reach working condition requirement with this swivel joint, thus leading to that joint failure is serious, changing frequently, and then waste material resources and wealth
Power, also have impact on quality and the efficiency of processing.
Content of the invention
The present invention is directed to the deficiencies in the prior art, provides a kind of high-speed joint；It is particularly suited for high-revolving rotation
Turn sealing structure, not only breach the bottleneck that conventional rotatory sealing is subject to rate limitation, and rotary shaft rotating speed is higher, sealing is then
Can be better.This structure is simple, and reliability is high, need not change sealing ring, non-maintaining, and can achieve many gas circuit sealings.
In order to achieve the above object, a kind of high-speed joint of the present invention, including seal shaft and be arranged on this seal shaft
On upper bearing (metal) and lower bearing, the outer wall of the axle portion of described seal shaft is provided with dynamic pressure groove and use for forming dynamic pressure firmness
In the cannelure of ventilation, it is provided with the gas outlet connecting with this cannelure in seal shaft；Described seal shaft is inserted in sealing shroud,
Described sealing shroud is provided with the air inlet connecting with cannelure.
Preferably, described dynamic pressure groove is camber line structure, to reach better seal effect.
Preferably, described dynamic pressure groove is regularly arranged on the disc outer wall of the axle portion of seal shaft, preferably close to reach
Envelope effect.
Preferably, described cannelure is vertical with the passage of gas outlet.
Preferably, described cannelure includes cannelure and lower cannelure, and described gas outlet includes the first gas outlet and
Two gas outlets, the first gas outlet is connected with upper cannelure, and the second gas outlet is then connected with lower cannelure；Described air inlet includes
First air inlet and the second air inlet, the first air inlet is connected with upper cannelure, and the second air inlet is connected with lower cannelure.
Described dynamic pressure groove is divided at least three rows, and this three rows dynamic pressure groove is regularly arranged the disc of the axle portion in seal shaft
On outer wall；Described cannelure includes cannelure and lower cannelure, and described upper cannelure, lower cannelure respectively move located at each row
On indent.
As the improvement further of such scheme, described first air inlet passes through the first radial direction through hole with upper cannelure even
Logical, described second air inlet is connected with lower cannelure by the second radial direction through hole.
Further, the passage of described first air inlet is vertical with the passage of the first radial direction through hole, the second air inlet logical
Road is vertical with the passage of the second radial direction through hole.
Preferably, the lower bearing of described seal shaft is equiped with the end ring preventing lower bearing from coming off.
During work, when seal shaft low speed rotation, dynamic pressure can not be formed between the dynamic pressure groove on seal shaft and sealing shroud firm
Gas, air flue inner high voltage air can have gas leak phenomenon between the slit of seal shaft and sealing shroud.But because seal shaft and sealing shroud
Between slit gap very little, the amount also very little of leakage, so gas outlet still can maintain operating air pressure.When seal shaft high speed
During rotation, between dynamic pressure groove meeting on seal shaft and sealing shroud, form dynamic pressure firmness, the property of this existing hydrodynamic bearing of dynamic pressure firmness
Matter, plays the effect of radial support to seal shaft, plays the role of the high pressure gas leakage in the ring air drain on baffle seal axle again,
Sealing function is played to the compressed air in air flue.Upper cannelure and lower cannelure, all so it is achieved that high-speed rotation sealing, are protected
Demonstrate,prove gases at high pressure effective transmission to the seal shaft of high-speed rotation from static sealing shroud.
Present invention is particularly suitable for high-revolving rotary seal structure, not only breach conventional rotatory sealing and be subject to rate limitation
Bottleneck, and rotary shaft rotating speed is higher, and sealing then can be better.This structure is simple, and reliability is high, need not change sealing ring,
Non-maintaining, and can achieve many gas circuit sealings.
Brief description
Fig. 1 is the overall structure cross-sectional schematic of the present invention；
Fig. 2 is the positive structure diagram of seal shaft；
Fig. 3 is the perspective view of seal shaft.
Wherein, 1 is seal shaft, and 2 is upper bearing (metal), and 3 is sealing shroud, and 4 is lower bearing, and 5 is end ring, and 6 is dynamic pressure groove, 71
For upper ring air drain, 72 is lower ring air drain, and 81 is the first air inlet, and 811 is the first radial direction through hole, and 82 is the second air inlet, and 821 are
Second radial direction through hole, 91 is the first gas outlet, and 92 is the second gas outlet.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
With reference to Fig. 1～3, a kind of high-speed joint of the embodiment of the present invention, including seal shaft 1 and be arranged on this sealing
Upper bearing (metal) 2 on axle 1 and lower bearing 4, the outer wall of the axle portion of described seal shaft 1 is provided with the dynamic pressure groove for forming dynamic pressure firmness
6 and for ventilation cannelure, be provided with the gas outlet connecting with this cannelure in seal shaft 1；Described seal shaft 1 be inserted in
In sealing shroud 3, described sealing shroud 3 is provided with the air inlet connecting with cannelure.It is equiped with the lower bearing 4 of described seal shaft 1
Prevent the end ring 5 that lower bearing 4 comes off.
Described dynamic pressure groove is camber line structure, and this dynamic pressure groove is regularly arranged on the disc outer wall of the axle portion of seal shaft 1, with
Reach better seal effect.Described cannelure is vertical with the passage of gas outlet.This cannelure includes cannelure 71 and lower ring
Shape groove 72, described gas outlet includes the first gas outlet 91 and the second gas outlet 92, and the first gas outlet 91 is connected with upper cannelure 71,
And the second gas outlet 92 is then connected with lower cannelure 72；Described air inlet includes the first air inlet 81 and the second air inlet 82, the
One air inlet 81 is connected with upper cannelure 71 by the first radial direction through hole 811, and the second air inlet 82 passes through the second radial direction through hole 821
Connect with lower cannelure 72.The passage of described first air inlet 81 is vertical with the passage of the first radial direction through hole 811, the second air inlet
82 passage is vertical with the passage of the second radial direction through hole 821.
Described dynamic pressure groove 6 is divided into four rows, and this four rows dynamic pressure groove is regularly arranged outside the disc of the axle portion of seal shaft 1
On wall；Described upper cannelure 71, lower cannelure 72 respectively on each row's dynamic pressure groove, in upper cannelure 71 and lower cannelure 72
Between be provided with two row's dynamic pressure grooves.
With reference to Fig. 1～3, during installation, first upper bearing (metal) 2 is contained on seal shaft 1, then the first air inlet of sealing shroud 3
81 and second air inlet 82 each lead into high pressure air, then seal shaft 1 is carefully charged in sealing shroud 3.In sealing shroud 3
First being passed through compressed air and reinstalling seal shaft 1 is the convenience considering to install.Because between seal shaft 1 and sealing shroud 3, gap is very
Little, only 3～4 microns, if not being passed through compressed air, in installation process, the external diameter of seal shaft 1 is connect with the internal diameter of sealing shroud 3
Touch and be easy to block, lead to not go under seal shaft 1.And after sealing shroud 3 is passed through compressed air, between sealing shroud 3 and seal shaft 1
Slit is the formation of air film, it is to avoid the contact with the internal diameter of sealing shroud 3 for the external diameter of seal shaft 1, so that the seal shaft 1 is successfully pacified
Put in sealing shroud 3.Finally, the lower end of seal shaft 1 loads lower bearing 4, is loaded on shaft end ring 5 and blocks lower bearing 4, prevents it
Come off in operation process.
With reference to Fig. 1～3, during work, when seal shaft 1 low speed rotation, between dynamic pressure groove 6 on seal shaft 1 and sealing shroud 3
Dynamic pressure firmness can not be formed, air flue inner high voltage air can have gas leak phenomenon between the slit of seal shaft 1 and sealing shroud 3.But because
For the slit gap very little between seal shaft 1 and sealing shroud 3, the amount also very little of leakage, so gas outlet still can maintain work
Air pressure.When seal shaft 1 high-speed rotation, between dynamic pressure groove 6 meeting on seal shaft 1 and sealing shroud 3, form dynamic pressure firmness, this moves
The property of the pressure existing hydrodynamic bearing of firmness, plays the effect of radial support, has the ring gas on baffle seal axle 1 again to seal shaft 1
The effect of the high pressure gas leakage in groove, plays sealing function to the compressed air in air flue.Upper cannelure 71 and lower cannelure
72 all so it is achieved that high-speed rotation sealing is it is ensured that gases at high pressure are from static sealing shroud 3 to the seal shaft 1 of high-speed rotation
Effective transmission.
The present embodiment has the advantage that：
1st, the rotatory sealing rotating speed achieving two or more gas circuit is more than 6000 turns；
2nd, during low speed, slit has the phenomenon of a small amount of gas leakage, but in the case that air inlet persistently supplies, permissible in air flue
Maintain supply air pressure, gas outlet can ratio air inlet slightly pressure drop, but do not interfere with use.With the raising of rotating speed, gas leakage is existing
As fading away, and rotating speed is higher, and sealing effectiveness is better；
3rd, during high-speed rotation, the phenomenon without frictional heat produces, it is to avoid contact seal caused by frictional heat one
Series of problems.
Present invention is particularly suitable for high-revolving rotary seal structure, not only breach conventional rotatory sealing and be subject to rate limitation
Bottleneck, and rotary shaft rotating speed is higher, and sealing then can be better.This structure is simple, and reliability is high, need not change sealing ring,
Non-maintaining, and can achieve many gas circuit sealings.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not subject to above-described embodiment
Limit, other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify,
All should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (8)
1. a kind of high-speed joint, including seal shaft and be arranged on the upper bearing (metal) on this seal shaft and lower bearing, its feature
It is：The outer wall of the axle portion of described seal shaft is provided with the dynamic pressure groove for forming dynamic pressure firmness and the annular for ventilation
Groove, is provided with the gas outlet connecting with this cannelure in seal shaft；Described seal shaft is inserted in sealing shroud, on described sealing shroud
It is provided with the air inlet connecting with cannelure.
2. a kind of high-speed joint according to claim 1 it is characterised in that：Described dynamic pressure groove is camber line structure.
3. a kind of high-speed joint according to claim 1 it is characterised in that：Described dynamic pressure groove is regularly arranged in close
On the disc outer wall of axle portion of envelope axle.
4. a kind of high-speed joint according to claim 1 it is characterised in that：Described cannelure and the passage of gas outlet
Vertically.
5. a kind of high-speed joint according to claim 1 it is characterised in that：Described cannelure include cannelure and
Lower cannelure, described gas outlet includes the first gas outlet and the second gas outlet, and the first gas outlet is connected with upper cannelure, and second
Gas outlet is then connected with lower cannelure；Described air inlet includes the first air inlet and the second air inlet, the first air inlet and upper ring
Shape groove connects, and the second air inlet is connected with lower cannelure.
6. a kind of high-speed joint according to claim 5 it is characterised in that：Described first air inlet passes through the first footpath
Connect to through hole with upper cannelure, described second air inlet is connected with lower cannelure by the second radial direction through hole.
7. a kind of high-speed joint according to claim 6 it is characterised in that：The passage of described first air inlet and
The passage of one radial direction through hole is vertical, and the passage of the second air inlet is vertical with the passage of the second radial direction through hole.
8. a kind of high-speed joint according to claim 1 it is characterised in that：Install on the lower bearing of described seal shaft
There is the end ring preventing lower bearing from coming off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075082.1A CN106481923A (en) | 2016-11-22 | 2016-11-22 | A kind of high-speed joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075082.1A CN106481923A (en) | 2016-11-22 | 2016-11-22 | A kind of high-speed joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106481923A true CN106481923A (en) | 2017-03-08 |
Family
ID=58275632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611075082.1A Pending CN106481923A (en) | 2016-11-22 | 2016-11-22 | A kind of high-speed joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106481923A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964973A (en) * | 2017-05-17 | 2017-07-21 | 深圳市山龙智控有限公司 | Screwed lock pays mechanism and filature |
| CN107336131A (en) * | 2017-08-31 | 2017-11-10 | 无锡七机机床有限公司 | Grinder structure |
| CN107477187A (en) * | 2017-08-09 | 2017-12-15 | 广州市昊志机电股份有限公司 | A kind of non-contact rotary sealing structure |
| CN111895197A (en) * | 2020-07-16 | 2020-11-06 | 江苏长龄液压股份有限公司 | Hydraulic central swivel joint with radial casting oil circuit cavity |
| CN113555998A (en) * | 2021-07-29 | 2021-10-26 | 中国船舶重工集团公司第七0七研究所 | Dynamic pressure air-bearing structure with pollution filtering device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030030225A1 (en) * | 2001-08-08 | 2003-02-13 | Masakazu Uesugi | Dynamic pressure seal device and rotary joint device using the same |
| US20040008913A1 (en) * | 2002-07-09 | 2004-01-15 | Masakazu Uesugi | Spindle device using dynamic pressure bearing |
| CN102303143A (en) * | 2011-08-03 | 2012-01-04 | 常州市力源恒机械有限公司 | Rotary gas distribution device for pneumatic chuck |
| CN103415731A (en) * | 2011-03-23 | 2013-11-27 | 伊格尔工业股份有限公司 | Sealing device |
| CN204437288U (en) * | 2015-01-15 | 2015-07-01 | 武汉格瑞拓机械有限公司 | A kind of inter-stage sealing axle sleeve structure of multistage centrifugal blower |
-
2016
- 2016-11-22 CN CN201611075082.1A patent/CN106481923A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030030225A1 (en) * | 2001-08-08 | 2003-02-13 | Masakazu Uesugi | Dynamic pressure seal device and rotary joint device using the same |
| US20040008913A1 (en) * | 2002-07-09 | 2004-01-15 | Masakazu Uesugi | Spindle device using dynamic pressure bearing |
| CN103415731A (en) * | 2011-03-23 | 2013-11-27 | 伊格尔工业股份有限公司 | Sealing device |
| CN102303143A (en) * | 2011-08-03 | 2012-01-04 | 常州市力源恒机械有限公司 | Rotary gas distribution device for pneumatic chuck |
| CN204437288U (en) * | 2015-01-15 | 2015-07-01 | 武汉格瑞拓机械有限公司 | A kind of inter-stage sealing axle sleeve structure of multistage centrifugal blower |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964973A (en) * | 2017-05-17 | 2017-07-21 | 深圳市山龙智控有限公司 | Screwed lock pays mechanism and filature |
| CN107477187A (en) * | 2017-08-09 | 2017-12-15 | 广州市昊志机电股份有限公司 | A kind of non-contact rotary sealing structure |
| CN107336131A (en) * | 2017-08-31 | 2017-11-10 | 无锡七机机床有限公司 | Grinder structure |
| CN111895197A (en) * | 2020-07-16 | 2020-11-06 | 江苏长龄液压股份有限公司 | Hydraulic central swivel joint with radial casting oil circuit cavity |
| CN113555998A (en) * | 2021-07-29 | 2021-10-26 | 中国船舶重工集团公司第七0七研究所 | Dynamic pressure air-bearing structure with pollution filtering device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170308 |