CN114263745A - Novel high-pressure gas rotary sealing device - Google Patents
Novel high-pressure gas rotary sealing device Download PDFInfo
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- CN114263745A CN114263745A CN202111561172.2A CN202111561172A CN114263745A CN 114263745 A CN114263745 A CN 114263745A CN 202111561172 A CN202111561172 A CN 202111561172A CN 114263745 A CN114263745 A CN 114263745A
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- sealing
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- oil
- pressure
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- 238000007789 sealing Methods 0.000 title claims abstract description 173
- 210000004907 gland Anatomy 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 39
- 230000009471 action Effects 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides a novel high-pressure gas rotary sealing device, connect the seal sleeve at the pivot excircle including pivot and rotation, the pivot central line sets up along left right direction, airflow channel has been seted up along the central line in the pivot is inside, the pivot is along radially seting up the interior inlet port with airflow channel intercommunication, the annular air duct with interior inlet port outer port intercommunication is seted up along the circumferencial direction to interior round intermediate position in the seal sleeve, seal sleeve radially sets up the outer inlet port with annular air duct intercommunication, it is connected through left bearing and right bearing rotation respectively between the interior circle of seal sleeve left side port and right port and the pivot excircle, seal sleeve left end and right-hand member all are equipped with end cover seal assembly, be equipped with the sealing washer + high pressure oil seal structure who is located the annular air duct left and right sides between seal sleeve and the pivot excircle. The rotary seal solves the problems of poor sealing performance, complex structure, short service life and the like of the high-pressure gas rotary seal, and has the advantages of good sealing performance, high rotation precision, long service life and the like.
Description
Technical Field
The invention belongs to the technical field of sealing in rotary machinery, and particularly relates to a novel high-pressure gas rotary sealing device.
Background
In the high-pressure gas sealing structure, it is generally encountered that the internal gas is prevented from leaking from the rotary structure or entering from the outside, and the rotary sealing device is widely used. In the seal of the hot coke type refrigerator, the working gas is 15 MPa of nitrogen, the gas is required to be pure, and high-pressure gas must be sent to a detector from a gas source device through a rotary sealing device. In the field of pyrolysis desorption, a gas exchange preventing device is required to be arranged at the joint of the rotary carbonization furnace and an adjacent mechanism. Once the external gas enters the rotary carbonization furnace from the connection position, not only the oxygen-deficient environment in the carbonization furnace can be damaged, but also the pyrolysis gas can explode under the action of the oxygen.
In the rotary sealing of high-pressure gas, many problems often occur, resulting in poor sealing performance. Most of the sealing devices commonly used at present are mechanical seals, the mechanical seals are sealed by sealing rings between fixing pieces and a rotating shaft, the sealing mode is not suitable for running at a high speed when being used for high-pressure gas rotary sealing, the friction resistance is large, and abrasion is easy to occur, so that the sealing device fails in advance. Aiming at the difficult problem of the existing high-pressure gas rotary seal, a device for the high-pressure gas rotary seal is urgently needed to solve the problem that the sealing performance of a rotary part is not good when a shaft has rotary motion relative to a sealing shell.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the novel high-pressure gas rotary sealing device which is good in sealing performance, high in rotation precision and long in service life.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a novel high-pressure gas rotary sealing device, connect the seal sleeve at the pivot excircle including pivot and rotation, the pivot central line sets up along left right direction, airflow channel has been seted up along the central line in the pivot is inside, the pivot is along radially seting up the interior inlet port with airflow channel intercommunication, the annular gas groove with interior inlet port outer port intercommunication is seted up along the circumferencial direction to interior round intermediate position in the seal sleeve, seal sleeve radially sets up the outer inlet port with annular gas groove intercommunication, it is connected through left bearing and right bearing rotation respectively between the interior circle of seal sleeve left end mouth and right port and the pivot excircle, seal sleeve is equipped with left end lid seal assembly in the left bearing left side, seal sleeve is equipped with right end lid seal assembly on the right bearing right side, seal sleeve is equipped with left sealing washer + high pressure oil seal structure between left bearing right side and pivot excircle, seal sleeve is equipped with right sealing washer + high pressure oil seal structure between right bearing left side and pivot excircle.
The outer circle of the rotating shaft is provided with an annular limiting step which is positioned and pressed with the left end ring surface of the left bearing inner ring, the outer circle of the rotating shaft is provided with a shaft sleeve which is used for jacking the right annular end surface of the right bearing inner ring, and the outer circle of the rotating shaft at the right end of the shaft sleeve is in threaded connection with a gland nut.
The left end cover sealing assembly and the right end cover sealing assembly are identical in structure and are arranged in a bilateral symmetry mode; the left end cover sealing assembly comprises an end cover and a dustproof sealing ring, the end cover is fixedly connected with the sealing sleeve through a plurality of screws uniformly arranged in the circumferential direction of the sealing sleeve, an annular mounting groove is formed in the inner circle of the end cover, and the dustproof sealing ring is sleeved on the rotating shaft and located in the annular mounting groove.
The left sealing ring + high-pressure oil sealing structure and the right sealing ring + high-pressure oil sealing structure are the same in structure and are arranged in a left-right symmetrical mode;
the right sealing ring and high-pressure oil sealing structure comprises an annular step groove arranged in a sealing sleeve, a left universal plug sealing ring, an oil ring sleeve, a right universal plug sealing ring and an annular pressing block are sequentially arranged on the outer circle of a rotating shaft from left to right in the annular step groove, the right end of the annular pressing block is in press connection with the left end of the outer circle of a right bearing, the lip of the left universal plug sealing ring faces right, the lip of the right universal plug sealing ring faces left, an oil filling hole corresponding to the outer circle of the oil ring sleeve is formed in the sealing sleeve along the radial direction, high-pressure oil is injected into the oil ring sleeve through the oil filling hole to enable the lip of the right end of the left universal plug sealing ring to be opened, the lip of the inner circle of the left end of the right universal plug sealing ring is opened to seal the sealing sleeve with the outer circle of the rotating shaft, and the outer port of the oil filling hole is connected with a pressure gauge.
The oil ring cover excircle is equipped with outer annular groove along the circumferencial direction, and the oil ring cover is interior circle and is equipped with inner ring groove along the circumferencial direction, and a plurality of through-holes that communicate outer annular groove and inner ring groove are evenly seted up along the circumferencial direction on the oil ring cover.
By adopting the technical scheme, the end cover is connected with the end face of the sealing sleeve by using the screw, and the dustproof sealing ring is arranged in the annular mounting groove of the inner circle of the end cover, so that external dust is prevented from entering the bearing and the service life of the bearing is prevented from being influenced; be equipped with outer inlet port and oil filler point on the sealing sleeve, the inlet port passes through annular air duct, epaxial interior inlet port and airflow channel intercommunication pivot, the oil filler point is relative with the oil ring cover, be provided with left pan stopper sealing washer and right pan stopper sealing washer in sealing sleeve's annular step inslot, the lip mouth of left pan stopper sealing washer and right pan stopper sealing washer sets up relatively, the oil ring cover sets up and floods between stopper sealing washer and the right pan stopper sealing washer on a left side, be equipped with a plurality of through-holes along the circumferencial direction on the oil ring cover, the ring-shaped briquetting is used for spacing bearing and right pan stopper sealing washer, make bearing inner circle and outer lane carry out interference fit with pivot and sealing sleeve respectively.
In order to fix a position sealing sleeve, set up the spacing step of annular on the left of the pivot, the right side sets up the external screw thread, makes gland nut and pivot carry out threaded connection, and gland nut compresses tightly the axle sleeve that sets up outside the bearing on right side simultaneously, and then has fixed a position right side bearing, and the rethread whole sealing sleeve makes left bearing roof pressure locate the location to the spacing step of annular left side.
The oil ring sleeve is provided with a plurality of through holes, high-pressure oil can conveniently enter the inner ring groove from the outer ring groove, and the left end and the right end of the oil ring sleeve can support the flooding plug sealing rings, so that a high-pressure sealing oil cavity can be formed between the two flooding plug sealing rings.
The left flood plug sealing ring and the right flood plug sealing ring lip are arranged oppositely, after the high-pressure oil is filled in the high-pressure sealing oil cavity, the flood plug sealing ring is tightly matched with the inner hole of the sealing sleeve due to the elastic action of the lip, so that the sealing of high-pressure oil can be completed, and the high-pressure oil is sealed for high-pressure gas.
The sealing sleeve and the rotating shaft are in clearance fit, so that smooth rotation of the rotating shaft is ensured, but high-pressure gas can enter a clearance between the inner circle of the sealing sleeve and the outer circle of the rotating shaft, and therefore the pressure of high-pressure oil in the high-pressure sealing oil cavity is always greater than that of the high-pressure gas in the airflow channel, a certain pressure difference is formed, and the condition that the high-pressure gas leaks through the high-pressure liquid is prevented.
In summary, the present invention is mainly used for establishing a seal between the seal housing and the rotating shaft, so as to realize the rotary sealing function of the high-pressure gas. The rotary sealing technology of the high-pressure liquid is relatively mature, so the invention mainly adopts the principle of sealing the high-pressure gas by using the high-pressure liquid, the structure mainly ensures that the pressure intensity of one side of the high-pressure oil is always greater than that of one side of the high-pressure gas by forming a certain pressure difference between one side of the high-pressure oil and one side of the gas of the flood plug sealing ring, prevents the gas from leaking, simultaneously, the two sides of the flood plug sealing ring are basically balanced in stress, plays a supporting role in the flood plug sealing ring, and prolongs the service life of the sealing ring. Compared with the prior art, the rotary sealing device solves the problems of poor sealing performance, complex structure, short service life and the like of the rotary seal of high-pressure gas, and has the advantages of good sealing performance, high rotation precision, long service life and the like. The high-speed rotary sealing device can realize high-speed rotary sealing of high-pressure gas within the temperature range of 0-500 degrees, and is successfully applied to a gas extraction experimental device.
Drawings
FIG. 1 is an axial cross-sectional schematic view of the present invention;
FIG. 2 is a schematic cross-sectional view of a sealing sleeve;
FIG. 3 is a perspective view of the sealing sleeve;
FIG. 4 is a schematic cross-sectional view of an oil ring sleeve;
fig. 5 is a perspective view of the oil ring sleeve.
Detailed Description
As shown in figures 1-5, the novel high-pressure gas rotary sealing device comprises a rotating shaft 1 and a sealing sleeve 2 rotatably connected to the outer circle of the rotating shaft 1, wherein the central line of the rotating shaft 1 is arranged along the left-right direction, an airflow channel 3 is arranged along the central line inside the rotating shaft 1, the rotating shaft 1 is radially provided with an inner air inlet 4 communicated with the airflow channel 3, the middle position of the inner circle of the sealing sleeve 2 is circumferentially provided with an annular air groove 5 communicated with the outer port of the inner air inlet 4, the sealing sleeve 2 is radially provided with an outer air inlet 6 communicated with the annular air groove 5, the inner circles of the left port and the right port of the sealing sleeve 2 are respectively and rotatably connected with the outer circle of the rotating shaft 1 through a left bearing 7 and a right bearing 8, the sealing sleeve 2 is provided with a left end cover sealing component on the left side of the left bearing 7, and the sealing sleeve 2 is provided with a right end cover sealing component on the right side of the right bearing 8, sealing sleeve 2 is equipped with left sealing washer + high-pressure oil seal structure between 7 right sides of left bearing and 1 excircle of pivot, and sealing sleeve 2 is equipped with right sealing washer + high-pressure oil seal structure between 8 left sides of right bearing and 1 excircle of pivot.
An annular limiting step 9 which is in positioning and pressure-welding with the left annular end face of the inner ring of the left bearing 7 is arranged on the left side of the left bearing 7 of the outer circle of the rotating shaft 1, a shaft sleeve 10 which is used for jacking and pressing the right annular end face of the inner ring of the right bearing 8 is arranged on the right side of the right bearing 8 of the outer circle of the rotating shaft 1, and a gland nut 11 is in threaded connection with the outer circle of the rotating shaft 1 at the right end of the shaft sleeve 10.
The left end cover sealing assembly and the right end cover sealing assembly are identical in structure and are arranged in a bilateral symmetry mode; the left end cover sealing component comprises an end cover 12 and a dustproof sealing ring 14, the end cover 12 is fixedly connected with the sealing sleeve 2 through a plurality of screws 13 uniformly arranged along the circumferential direction of the sealing sleeve 2, an annular mounting groove is formed in the inner circle of the end cover 12, and the dustproof sealing ring 14 is sleeved on the rotating shaft 1 and located in the annular mounting groove.
The left sealing ring + high-pressure oil sealing structure and the right sealing ring + high-pressure oil sealing structure are the same in structure and are arranged in a left-right symmetrical mode;
the right sealing ring and high-pressure oil sealing structure comprises an annular step groove arranged in the inner circle of a sealing sleeve 2, a left universal plug sealing ring 15, an oil ring sleeve 16, a right universal plug sealing ring 17 and an annular pressing block 18 are sequentially arranged on the outer circle of a rotating shaft 1 in the annular step groove from left to right, the right end of the annular pressing block 18 is in pressing connection with the left end of the outer circle of a right bearing 8, the lip of the left universal plug sealing ring 15 faces right, the lip of the right universal plug sealing ring 17 faces left, an oil filling hole 19 corresponding to the outer circle of the oil ring sleeve 16 is formed in the sealing sleeve 2 along the radial direction, high-pressure oil is injected into the oil ring sleeve 16 through the oil filling hole 19 to enable the lip of the right end of the left universal plug sealing ring 15 to be opened, the lip of the left end of the right universal plug sealing ring 17 is opened to seal the inner circle of the sealing sleeve 2 with the outer circle of the rotating shaft 1, and the outer port of the oil filling hole 19 is connected with a pressure gauge (not shown).
An outer ring groove 20 is formed in the outer circle of the oil ring sleeve 16 in the circumferential direction, an inner ring groove 21 is formed in the inner circle of the oil ring sleeve 16 in the circumferential direction, and a plurality of through holes 22 communicated with the outer ring groove 20 and the inner ring groove 21 are uniformly formed in the oil ring sleeve 16 in the circumferential direction.
When the oil seal ring is in operation, high-pressure oil is firstly introduced into the oil injection hole 19 and enters the oil ring sleeve 16, the lips of the left flooding plug seal ring 15 and the right flooding plug seal ring 17 can be enlarged under the action of the high-pressure oil, and the left flooding plug seal ring 15 and the right flooding plug seal ring 17 can be tightly matched with the inner circle of the seal sleeve 2 under the elastic action of the lips, so that the high-pressure oil in a high-pressure seal oil cavity is sealed; when the pressure in the high-pressure sealed oil cavity is stable, high-pressure gas enters the gas flow channel 3 through the external gas inlet hole 6, the annular gas groove 5 and the internal gas inlet hole 4, and the punching is stopped after the pressure value of the gas in the gas flow channel 3 reaches a set value, and then the work is started. During operation, sealing sleeve 2 is fixed, and pivot 1 rotates with the uniform velocity, for convenient real-time pressure detection, need install the manometer respectively at outer inlet port 6 and oil filler point 19 to can monitor sealing performance.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a novel high-pressure gas rotary seal device, includes the pivot and rotates the sealing sleeve who connects at the pivot excircle, and the pivot central line sets up along left right direction, and airflow channel has been seted up along the central line to pivot inside, and the pivot is along radially seting up the interior inlet port with airflow channel intercommunication, and the annular air duct that communicates with interior inlet port outer port is seted up along the circumferencial direction to the interior round intermediate position of sealing sleeve, and sealing sleeve radially sets up the outer inlet port with annular air duct intercommunication, its characterized in that: the inner circles of the left port and the right port of the sealing sleeve are rotatably connected with the outer circle of the rotating shaft through a left bearing and a right bearing respectively, the left side of the left bearing of the sealing sleeve is provided with a left end cover sealing assembly, the right side of the right bearing of the sealing sleeve is provided with a right end cover sealing assembly, the sealing sleeve is provided with a left sealing ring and high-pressure oil sealing structure between the right side of the left bearing and the outer circle of the rotating shaft, and the right side of the right bearing of the sealing sleeve and the high-pressure oil sealing structure are arranged between the left side of the right bearing and the outer circle of the rotating shaft;
the sealing device adopts the principle that high-pressure liquid seals high-pressure gas, a certain pressure difference is formed between one side of the left sealing ring and the right sealing ring by the oil pressure of high-pressure oil and the other side of the left sealing ring and the right sealing ring by the air pressure of the high-pressure oil, the pressure of one side of the high-pressure oil is guaranteed to be always greater than that of one side of the high-pressure gas, gas leakage is prevented, meanwhile, the two sides of the left sealing ring and the right sealing ring are basically balanced in stress, the left sealing ring and the right sealing ring are also supported, and the service lives of the left sealing ring and the right sealing ring are prolonged.
2. The novel high-pressure gas rotary sealing device according to claim 1, wherein: the outer circle of the rotating shaft is provided with an annular limiting step which is positioned and pressed with the left end ring surface of the left bearing inner ring, the outer circle of the rotating shaft is provided with a shaft sleeve which is used for jacking the right annular end surface of the right bearing inner ring, and the outer circle of the rotating shaft at the right end of the shaft sleeve is in threaded connection with a gland nut.
3. A novel high-pressure gas rotary seal device according to claim 1 or 2, characterized in that: the left end cover sealing assembly and the right end cover sealing assembly are identical in structure and are arranged in a bilateral symmetry mode; the left end cover sealing assembly comprises an end cover and a dustproof sealing ring, the end cover is fixedly connected with the sealing sleeve through a plurality of screws uniformly arranged in the circumferential direction of the sealing sleeve, an annular mounting groove is formed in the inner circle of the end cover, and the dustproof sealing ring is sleeved on the rotating shaft and located in the annular mounting groove.
4. The novel high-pressure gas rotary sealing device according to claim 3, wherein: the left sealing ring + high-pressure oil sealing structure and the right sealing ring + high-pressure oil sealing structure are the same in structure and are arranged in a left-right symmetrical mode;
the right sealing ring and high-pressure oil sealing structure comprises an annular step groove arranged in a sealing sleeve, a left universal plug sealing ring, an oil ring sleeve, a right universal plug sealing ring and an annular pressing block are sequentially arranged on the outer circle of a rotating shaft from left to right in the annular step groove, the right end of the annular pressing block is in press connection with the left end of the outer circle of a right bearing, the lip of the left universal plug sealing ring faces right, the lip of the right universal plug sealing ring faces left, an oil filling hole corresponding to the outer circle of the oil ring sleeve is formed in the sealing sleeve along the radial direction, high-pressure oil is injected into the oil ring sleeve through the oil filling hole to enable the lip of the right end of the left universal plug sealing ring to be opened, the lip of the inner circle of the left end of the right universal plug sealing ring is opened to seal the sealing sleeve with the outer circle of the rotating shaft, and the outer port of the oil filling hole is connected with a pressure gauge.
5. The novel high-pressure gas rotary sealing device according to claim 4, wherein: the oil ring cover excircle is equipped with outer annular groove along the circumferencial direction, and the oil ring cover is interior circle and is equipped with inner ring groove along the circumferencial direction, and a plurality of through-holes that communicate outer annular groove and inner ring groove are evenly seted up along the circumferencial direction on the oil ring cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561172.2A CN114263745A (en) | 2021-12-20 | 2021-12-20 | Novel high-pressure gas rotary sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561172.2A CN114263745A (en) | 2021-12-20 | 2021-12-20 | Novel high-pressure gas rotary sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114263745A true CN114263745A (en) | 2022-04-01 |
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ID=80827940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561172.2A Pending CN114263745A (en) | 2021-12-20 | 2021-12-20 | Novel high-pressure gas rotary sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114263745A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202851977U (en) * | 2012-11-08 | 2013-04-03 | 浙江大丰实业有限公司 | Active type pressurized seal device |
| CN207956871U (en) * | 2018-01-16 | 2018-10-12 | 中山市思科维机械设备有限公司 | Sealing mechanism for shaft end and speed reducer, screw conveyor |
| CN211289113U (en) * | 2019-05-17 | 2020-08-18 | 鲁湖斌 | Gas circuit rotary joint with shock absorption function |
-
2021
- 2021-12-20 CN CN202111561172.2A patent/CN114263745A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202851977U (en) * | 2012-11-08 | 2013-04-03 | 浙江大丰实业有限公司 | Active type pressurized seal device |
| CN207956871U (en) * | 2018-01-16 | 2018-10-12 | 中山市思科维机械设备有限公司 | Sealing mechanism for shaft end and speed reducer, screw conveyor |
| CN211289113U (en) * | 2019-05-17 | 2020-08-18 | 鲁湖斌 | Gas circuit rotary joint with shock absorption function |
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