CN110792778A - High-speed rotary joint with gas sealing structure - Google Patents
High-speed rotary joint with gas sealing structure Download PDFInfo
- Publication number
- CN110792778A CN110792778A CN201911171253.4A CN201911171253A CN110792778A CN 110792778 A CN110792778 A CN 110792778A CN 201911171253 A CN201911171253 A CN 201911171253A CN 110792778 A CN110792778 A CN 110792778A
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- China
- Prior art keywords
- ring
- bearing seat
- rotating shaft
- bearing
- air inlet
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 45
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 239000000110 cooling liquid Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 210000004907 gland Anatomy 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 230000007774 longterm Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Images
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
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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 Devices (AREA)
- Mounting Of Bearings Or Others (AREA)
- Sealing Of Bearings (AREA)
Abstract
The present invention relates to a high-speed rotary joint having an effect of long-term effectiveness of sealing properties. The invention discloses a high-speed rotating joint with a gas sealing structure, which comprises a rotating shaft and a bearing seat, wherein the bearing seat is used for inserting the rotating shaft, a gland and a rear cover which are used for sealing the bearing seat are respectively arranged at two ends of the bearing seat, at least one bearing which is attached to the inner wall of the bearing seat is sleeved outside the rotating shaft, a movable sealing ring is arranged at one end of the rotating shaft, which is inserted into the bearing seat, a static ring seat is embedded in the rear cover, and a static sealing ring which is matched with the movable sealing ring is arranged on; the rear cover is internally provided with a cooling cavity communicated with the static sealing ring, the bearing seat is provided with a leakage hole for cooling liquid to leave, the bearing seat is provided with an air inlet cavity of which the tail end is communicated with the rotating shaft, and the tail end of the air inlet cavity is positioned between the bearing and the dynamic sealing ring. By means of the matching of the rotating shaft and the air inlet cavity, a high-pressure air film is formed between the bearing seat and the rotating shaft, and the sealing performance is guaranteed.
Description
Technical Field
The present invention relates to a high-speed rotary joint, and more particularly, to a high-speed rotary joint with a gas seal structure.
Background
The end faces of the dynamic sealing ring and the static sealing ring which are ground are mutually attached by the pressure of an elastic component and a cooling medium, and when the elastic component and the cooling medium rotate relatively, a layer of extremely thin medium film is maintained between the end faces to achieve the purpose of sealing.
However, such a sealing structure has a certain disadvantage that, when the joint end faces of the dynamic sealing ring and the static sealing ring are worn, the sealing effect is deteriorated, and the coolant can permeate into the rotary joint through the joint end faces. A part of leaked cooling liquid can be discharged from the inside of the rotary joint through a leakage hole of the rotary joint, and meanwhile, a part of leaked cooling liquid can enter a bearing of the rotary joint through a gap between the bearing seat and the rotating shaft, so that the bearing of the rotary joint is damaged, and finally the cooling liquid entering the bearing can be discharged from the gap between the gland and the nut, and the rotary joint cannot be normally used. There is a problem that the sealing property becomes low after long-term use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-speed rotary joint with a gas sealing structure, which has the effect of long-term effective sealing performance.
In order to achieve the technical purpose, the invention provides the following technical scheme: a high-speed rotary joint with a gas sealing structure comprises a rotating shaft and a bearing seat for inserting the rotating shaft, wherein a gland and a rear cover for sealing the bearing seat are respectively arranged at two ends of the bearing seat, at least one bearing attached to the inner wall of the bearing seat is sleeved outside the rotating shaft, a movable sealing ring is arranged at one end of the rotating shaft inserted into the bearing seat, a static ring seat is embedded in the rear cover, and a static sealing ring matched with the movable sealing ring is arranged on the static ring seat;
the rear cover is internally provided with a cooling cavity communicated with the static sealing ring, the bearing seat is provided with a leakage hole for cooling liquid to leave, the bearing seat is provided with an air inlet cavity of which the tail end is communicated with the rotating shaft, and the tail end of the air inlet cavity is positioned between the bearing and the dynamic sealing ring.
Through adopting above-mentioned technical scheme, when the driving piece drives the pivot and rotates, carry compressed air to the air inlet cavity with the help of the air pump, send the cooling chamber into with the coolant liquid simultaneously, compressed air moves the end back in air inlet cavity, can form the one deck high-pressure air film in the clearance of bearing frame and pivot to the clearance of bearing frame and pivot is plugged up to air pressure, inside the coolant liquid of revealing in the rotary joint can not get into the bearing through the clearance, guaranteed the long-term effective of leakproofness. Meanwhile, the compressed air can also enable the leaked cooling liquid to be discharged from the leakage hole quickly, so that the reliability of the rotary joint is improved, and the service life of the rotary joint is prolonged.
Preferably, the rotating shaft is sleeved with a circular lining ring, a step groove for the lining ring to be attached and inserted is formed in the inner wall of one end, close to the rear cover, of the bearing seat, the lining ring is made of hard plastics, a first annular groove is formed in the inner wall of the lining ring, and an air inlet hole communicated with the air inlet cavity is formed in the lining ring.
By adopting the technical scheme, the lining ring replaces the bearing seat to be attached to the rotating shaft, the lining ring made of hard plastics can be polished smoothly, the friction force between the lining ring and the rotating shaft is reduced, the long-term friction between the rotating shaft and the bearing seat is avoided, the gap between the rotating shaft and the bearing seat is changed, the formation of a high-pressure air film is influenced, and the service life of the rotary joint is prolonged.
Preferably, the inner wall of the bearing seat is provided with a second annular groove communicated with the air inlet cavity, the second annular groove is flush with the first annular groove, and at least three air inlets are formed in the inner wall of the bearing seat.
By adopting the technical scheme, after the compressed air enters the air inlet cavity, the annular groove II is filled with the compressed air, the compressed air can enter the annular groove I from the air inlet hole, and the compressed air is ensured to rapidly enter the gap between the rotating shaft and the bearing seat.
Preferably, the rear cover is provided with a plurality of accommodating grooves along the axial direction, and a compression spring for pushing the stationary ring seat to the rotating shaft is arranged in each accommodating groove.
Through adopting above-mentioned technical scheme, back lid and bearing frame fixed connection back, compression spring is impressed the storage tank by quiet ring seat, and compression spring just can outwards push away quiet ring seat always, makes quiet sealing ring and dynamic seal ring keep closely laminating, has improved sealed steadiness.
Preferably, the number of the bearings is two, the two bearings are separated by an inner ring and an outer ring, the inner ring is fitted and sleeved on the rotating shaft, and the outer wall of the outer ring is fitted and sleeved on the inner wall of the bearing seat.
Through adopting above-mentioned technical scheme, separate two bearings through inner ring and outer loop, because the pivot is compressed tightly in the bearing frame, consequently two bearings can closely laminate with inner ring, outer loop respectively, and inner ring and outer loop disconnection avoid inner ring and outer loop to influence the normal rotation of bearing.
In summary, the present invention achieves the following effects:
1. by means of the matching of the rotating shaft and the air inlet cavity, a high-pressure air film is formed between the bearing seat and the rotating shaft, and the sealing performance is guaranteed.
Drawings
FIG. 1 is a schematic view for showing the overall structure in the present embodiment;
FIG. 2 is an enlarged view of a portion of FIG. 1 showing the mating relationship of the cooling chamber and the gasket.
In the figure, 1, a rotating shaft; 11. a bearing; 12. a movable sealing ring; 13. a gasket; 14. a first annular groove; 15. an air inlet; 16. an inner ring; 17. an outer ring; 2. a bearing seat; 21. a second annular groove; 3. a gland; 4. a rear cover; 41. a stationary ring seat; 42. a static seal ring; 43. a cooling chamber; 44. a leak hole; 45. an air inlet cavity; 46. compressing the spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example (b): the utility model provides a take gas seal structure's high-speed rotary joint, as shown in figure 1, including pivot 1 and the bearing frame 2 that supplies pivot 1 male, the both ends of bearing frame 2 are provided with gland 3 and back lid 4 that are used for sealing bearing frame 2 respectively, 1 overcoat of pivot is equipped with the bearing 11 of 2 inner walls of at least one laminating bearing frame, the one end that pivot 1 inserted bearing frame 2 is provided with movable sealing ring 12, the embedded quiet ring seat 41 that is equipped with of back lid 4, be provided with on the quiet ring seat 41 with movable sealing ring 12 complex quiet sealing ring 42. A cooling cavity 43 communicated with the static sealing ring 42 is formed in the rear cover 4, a leakage hole 44 for cooling liquid to leave is formed in the bearing seat 2, an air inlet cavity 45 with the tail end communicated with the rotating shaft 1 is formed in the bearing seat 2, and the tail end of the air inlet cavity 45 is located between the bearing 11 and the dynamic sealing ring 12.
When the driving piece drives the rotating shaft 1 to rotate, compressed air is conveyed into the air inlet cavity 45 by means of the air pump, meanwhile, the cooling cavity 43 is conveyed with cooling liquid, the compressed air moves to the tail end of the air inlet cavity 45, a layer of high-pressure air film can be formed in the gap between the bearing seat 2 and the rotating shaft 1, the gap between the bearing seat 2 and the rotating shaft 1 is plugged by air pressure, the cooling liquid leaked into the rotating joint cannot enter the bearing 11 through the gap, and the long-term effectiveness of sealing performance is guaranteed. While the compressed air also allows the leaked coolant to be quickly discharged from the leakage hole 44.
As shown in fig. 1 and 2, a ring-shaped lining ring 13 is sleeved outside the rotating shaft 1, a step groove for the lining ring 13 to be attached and inserted is formed in the inner wall of one end, close to the rear cover 4, of the bearing seat 2, the lining ring 13 is made of hard plastic, a first annular groove 14 is formed in the inner wall of the lining ring 13, and an air inlet hole 15 communicated with the air inlet cavity 45 is formed in the lining ring 13. The lining ring 13 replaces the bearing seat 2 to be attached to the rotating shaft 1, the lining ring 13 made of hard plastics can be polished smoothly, the friction force between the lining ring 13 and the rotating shaft 1 is reduced, long-term friction between the rotating shaft 1 and the bearing seat 2 is avoided, the gap between the rotating shaft 1 and the bearing seat 2 is changed, the formation of a high-pressure air film is influenced, and the service life of the rotary joint is prolonged.
As shown in fig. 2, the inner wall of the bearing seat 2 is provided with a second annular groove 21 communicated with the air inlet cavity 45, the second annular groove 21 is flush with the first annular groove 14, and the number of the air inlet holes 15 is at least three, after compressed air enters the air inlet cavity 45, the second annular groove 21 is filled, the compressed air can enter the first annular groove 14 from the air inlet holes 15, and the compressed air can rapidly enter a gap between the rotating shaft 1 and the bearing seat 2.
As shown in fig. 1, a plurality of accommodating grooves are axially formed in the rear cover 4, a compression spring 46 for pushing the stationary ring seat 41 to the rotating shaft 1 is disposed in each accommodating groove, after the rear cover 4 and the bearing seat 2 are fixedly connected, the compression spring 46 is pressed into the accommodating groove by the stationary ring seat 41, and the compression spring 46 can always push the stationary ring seat 41 outwards, so that the stationary seal ring 42 and the movable seal ring 12 are kept tightly attached.
As shown in fig. 1, two bearings 11 are provided, the two bearings 11 are separated by an inner ring 16 and an outer ring 17, the inner ring 16 is fitted on the rotating shaft 1, the outer wall of the outer ring 17 is fitted on the inner wall of the bearing seat 2, the two bearings 11 are separated by the inner ring 16 and the outer ring 17, and the rotating shaft 1 is pressed in the bearing seat 2, so that the two bearings 11 can be respectively tightly fitted with the inner ring 16 and the outer ring 17, the inner ring 16 and the outer ring 17 are disconnected, and the influence of the inner ring 16 and the outer ring 17 on the normal rotation of the bearings 11 is avoided.
Claims (5)
1. The utility model provides a take gas seal structure's high-speed rotary joint which characterized in that: the sealing device comprises a rotating shaft (1) and a bearing seat (2) for inserting the rotating shaft (1), wherein a gland (3) and a rear cover (4) for sealing the bearing seat (2) are respectively arranged at two ends of the bearing seat (2), at least one bearing (11) attached to the inner wall of the bearing seat (2) is sleeved outside the rotating shaft (1), a movable sealing ring (12) is arranged at one end, inserted into the bearing seat (2), of the rotating shaft (1), a static ring seat (41) is embedded in the rear cover (4), and a static sealing ring (42) matched with the movable sealing ring (12) is arranged on the static ring seat (41);
a cooling cavity (43) communicated with the static sealing ring (42) is formed in the rear cover (4), a leakage hole (44) for cooling liquid to leave is formed in the bearing seat (2), an air inlet cavity (45) with the tail end communicated with the rotating shaft (1) is formed in the bearing seat (2), and the tail end of the air inlet cavity (45) is located between the bearing (11) and the dynamic sealing ring (12).
2. The high-speed rotary joint with a gas seal structure according to claim 1, wherein: the bearing seat is characterized in that a ring-shaped lining ring (13) is sleeved outside the rotating shaft (1), a step groove for fitting and inserting the lining ring (13) is formed in the inner wall of one end, close to the rear cover (4), of the bearing seat (2), the lining ring (13) is made of hard plastics, a first annular groove (14) is formed in the inner wall of the lining ring (13), and an air inlet hole (15) communicated with an air inlet cavity (45) is formed in the lining ring (13).
3. The high-speed rotary joint with a gas seal structure according to claim 2, wherein: the inner wall of the bearing seat (2) is provided with a second annular groove (21) communicated with the air inlet cavity (45), the second annular groove (21) is flush with the first annular groove (14), and at least three air inlets (15) are formed.
4. A high-speed rotary joint with a gas seal structure according to claim 3, wherein: a plurality of containing grooves are formed in the rear cover (4) in the axial direction, and a compression spring (46) used for pushing the static ring seat (41) to the rotating shaft (1) is arranged in each containing groove.
5. The high-speed rotary joint with a gas seal structure according to claim 4, wherein: the bearing (11) have two, two separate through inner ring (16) and outer ring (17) between bearing (11), the laminating cover of inner ring (16) is on pivot (1), outer wall laminating bearing frame (2) inner wall of outer ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911171253.4A CN110792778A (en) | 2019-11-26 | 2019-11-26 | High-speed rotary joint with gas sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911171253.4A CN110792778A (en) | 2019-11-26 | 2019-11-26 | High-speed rotary joint with gas sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792778A true CN110792778A (en) | 2020-02-14 |
Family
ID=69446240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911171253.4A Pending CN110792778A (en) | 2019-11-26 | 2019-11-26 | High-speed rotary joint with gas sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792778A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11287371A (en) * | 1998-04-03 | 1999-10-19 | Nippon Pillar Packing Co Ltd | Rotary joint |
| US20060017283A1 (en) * | 2002-12-04 | 2006-01-26 | Erich Maier | Device for feeding a gaseous and/or liquid medium to a rotating pressurised system |
| CN201007403Y (en) * | 2007-01-23 | 2008-01-16 | 浙江柏润液压有限公司 | Single tube rotary joint for cooling |
| JP2009228804A (en) * | 2008-03-24 | 2009-10-08 | Nippon Pillar Packing Co Ltd | Rotary joint for cutting machine |
| CN106151740A (en) * | 2016-08-22 | 2016-11-23 | 广西盛誉糖机制造有限责任公司 | A kind of inducing QI piecing devices for automatic centrifugal machine |
| CN106286838A (en) * | 2015-05-26 | 2017-01-04 | 新特能源股份有限公司 | A kind of agitator tank stuffing seal |
| CN206338414U (en) * | 2016-12-27 | 2017-07-18 | 内蒙古大唐国际托克托发电有限责任公司 | Mixer shaft sealer |
| CN211145359U (en) * | 2019-11-26 | 2020-07-31 | 无锡博华机电有限公司 | High-speed rotary joint with gas sealing structure |
-
2019
- 2019-11-26 CN CN201911171253.4A patent/CN110792778A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11287371A (en) * | 1998-04-03 | 1999-10-19 | Nippon Pillar Packing Co Ltd | Rotary joint |
| US20060017283A1 (en) * | 2002-12-04 | 2006-01-26 | Erich Maier | Device for feeding a gaseous and/or liquid medium to a rotating pressurised system |
| CN201007403Y (en) * | 2007-01-23 | 2008-01-16 | 浙江柏润液压有限公司 | Single tube rotary joint for cooling |
| JP2009228804A (en) * | 2008-03-24 | 2009-10-08 | Nippon Pillar Packing Co Ltd | Rotary joint for cutting machine |
| CN106286838A (en) * | 2015-05-26 | 2017-01-04 | 新特能源股份有限公司 | A kind of agitator tank stuffing seal |
| CN106151740A (en) * | 2016-08-22 | 2016-11-23 | 广西盛誉糖机制造有限责任公司 | A kind of inducing QI piecing devices for automatic centrifugal machine |
| CN206338414U (en) * | 2016-12-27 | 2017-07-18 | 内蒙古大唐国际托克托发电有限责任公司 | Mixer shaft sealer |
| CN211145359U (en) * | 2019-11-26 | 2020-07-31 | 无锡博华机电有限公司 | High-speed rotary joint with gas sealing structure |
Non-Patent Citations (1)
| Title |
|---|
| 赵建英: "《机械设备》", vol. 1, 31 August 2009, 西南交通大学出版社, pages: 141 - 142 * |
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