CN108071806B - Rotary shaft liquid seal device - Google Patents
Rotary shaft liquid seal device Download PDFInfo
- Publication number
- CN108071806B CN108071806B CN201611005502.9A CN201611005502A CN108071806B CN 108071806 B CN108071806 B CN 108071806B CN 201611005502 A CN201611005502 A CN 201611005502A CN 108071806 B CN108071806 B CN 108071806B
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- liquid
- rotary shaft
- rotating shaft
- space
- annular wall
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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
- F16J15/42—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by centrifugal force
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
A rotary shaft liquid seal device comprises a rotary shaft, a ring groove unit, barrier liquid and a shell unit. The ring groove unit is hermetically connected with the rotating shaft and defines a liquid seal space. The barrier liquid is filled in the liquid seal space. The shell unit, the rotating shaft and the annular groove unit are arranged at intervals and comprise a first shell, a second shell and a separating annular wall. The first shell defines a reaction space. The second shell surrounds the annular groove unit and the rotating shaft at intervals. The separating annular wall extends into the liquid-tight space. When the rotating shaft rotates to rotate the ring groove unit, the barrier liquid blocks the reaction space from communicating with the gas outside the first shell. The rotating shaft liquid sealing device can utilize the barrier liquid to realize airtight sealing and reduce the use of mechanical elements through the annular groove unit and the separating annular wall.
Description
Technical Field
The present invention relates to a liquid seal device for a rotating shaft, and more particularly, to a liquid seal device for a rotating shaft, which includes a ring groove unit hermetically connected to a rotating shaft, and a partition ring wall spaced apart from the rotating shaft and the ring groove unit.
Background
In the prior art, a mechanical seal (mechanical seal) such as a clamp-on seal (cartridge seal) is generally used for airtight sealing of devices using a rotating shaft (such as a rotating packed bed reactor and an axial flow pump), but the airtight sealing is achieved by using mechanical elements such as an oil seal, a spring or a blade, so that not only are the operating conditions such as the type of a contacted fluid, the ambient temperature and the peripheral speed limited, but also the mechanical elements are gradually fatigued or corroded along with the use time and need to be replaced to avoid leakage. If the mechanical shaft seal is not used, a sufficient sealing degree cannot be generated, and more extra energy is often required to overcome the friction force generated by the mechanical shaft seal to drive the shaft seal device.
Disclosure of Invention
The invention aims to provide a rotary shaft liquid seal device which can overcome the defects of the prior art.
The rotating shaft liquid sealing device comprises a rotating shaft, a ring groove unit, barrier liquid and a shell unit. The ring groove unit is hermetically connected with the rotating shaft and is matched with the rotating shaft to define a liquid seal space between the ring groove unit and the rotating shaft. The barrier liquid is filled in the liquid seal space. The shell unit, the rotating shaft and the annular groove unit are arranged at intervals and comprise a first shell, a second shell and a separating annular wall. The first shell defines a reaction space which is positioned inside and communicated with the liquid seal space. The second shell is connected with the first shell and surrounds the annular groove unit and the rotating shaft at intervals so as to contain the barrier liquid. The separating annular wall extends into the liquid seal space from the first shell, so that the liquid seal space is provided with a first area and a second area which are respectively positioned at two sides of the separating annular wall. When the rotating shaft is driven by the outside to rotate so as to enable the annular groove unit to rotate relative to the shell unit, the barrier liquid is driven by centrifugal force to be distributed in the first area and the second area simultaneously, and the reaction space is blocked from being communicated with gas outside the first shell.
the present invention will be described in detail below:
Preferably, the ring groove unit comprises a base wall and a first ring wall. The base wall closely surrounds the rotation axis and extends in a radial direction of the rotation axis. The first annular wall is hermetically and fixedly connected with the base wall, extends from the base wall to the first shell and surrounds the separating annular wall at intervals.
More preferably, the ring groove unit further includes a second ring wall sealingly fixed to the first ring wall, extending from the first ring wall toward the rotating shaft and surrounding the rotating shaft at intervals.
Still more preferably, the first annular wall extends from the base wall toward the first housing in the axial direction of the rotary shaft, and the second annular wall extends from the first annular wall toward the rotary shaft in the radial direction of the rotary shaft.
Still more preferably, the ring groove unit further includes a third annular wall sealingly fixed to the second annular wall, extending from the second annular wall in the axial direction of the rotary shaft toward the partition annular wall and surrounding the rotary shaft at intervals.
preferably, the partition ring wall includes a blocking end portion extending into the liquid-tight space in the axial direction of the rotary shaft and surrounding the rotary shaft at intervals to block the blocking liquid from entering the reaction space.
Preferably, the first housing includes a sleeve extending into the second housing in the axial direction of the rotating shaft for the rotating shaft to pass through.
More preferably, the partition ring wall extends from the sleeve radially outward of the rotation axis into the liquid-tight space.
Preferably, the second housing includes an inner reservoir surrounding the rotating shaft and disposed below the annular groove unit at intervals to contain the barrier liquid overflowing the liquid seal space.
More preferably, the rotating shaft liquid seal device further comprises a communication pipeline for communicating the liquid seal space with the interior of the liquid storage tank so as to replace the barrier liquid in the liquid seal space. Still more preferably, the communication pipeline passes through the second casing and the partition annular wall from the outside of the second casing to connect the first region and passes through the second casing from the outside of the second casing to connect the inside of the reservoir.
Preferably, the rotating shaft liquid seal device further comprises a rotating bed which is arranged in the reaction space and connected with the rotating shaft.
The invention has the beneficial effects that: the rotating shaft liquid sealing device can synchronously block the reaction space from communicating with the gas outside the first shell through the annular groove unit and the separating annular wall, is suitable for both a negative pressure state and a positive pressure state, and can reduce the use of mechanical elements to avoid leakage.
Drawings
Other features and effects of the present invention will be apparent from the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a cross-sectional view of a first embodiment of a rotary shaft wet seal assembly of the present invention;
FIG. 2 is a cross-sectional view of a second embodiment of the rotary shaft wet seal apparatus of the present invention;
FIG. 3 is a cross-sectional view of a third embodiment of a rotary shaft wet seal assembly of the present invention;
FIG. 4 is a cross-sectional view of a fourth embodiment of a rotary shaft wet seal assembly of the present invention;
FIG. 5 is a cross-sectional view of a fifth embodiment of the rotary shaft wet seal apparatus of the present invention; and
fig. 6 is a sectional view of a sixth embodiment of a rotary shaft fluid seal apparatus of the present invention.
Detailed Description
Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.
The invention will be further described in the following examples, but it should be understood that these examples are for illustrative purposes only and are not to be construed as limiting the practice of the invention.
< example >
Referring to fig. 1, a first embodiment of a rotary shaft fluid seal apparatus 1 of the present invention comprises a rotary shaft 2, a ring groove unit 3, barrier fluid 4, a housing unit 5, a communication pipe 6 and a rotary bed 7.
The housing unit 5 is spaced apart from the rotating shaft 2 and the ring groove unit 3, and includes a first housing 51, a second housing 52, and a partition wall 53.
the ring groove unit 3 is hermetically connected to the rotary shaft 2 and cooperates with the rotary shaft 2 to define a fluid-tight space 30 therebetween. The ring groove unit 3 includes a base wall 31, a first annular wall 32, a second annular wall 33, and a third annular wall 34. The base wall 31 closely surrounds the rotation shaft 2 and extends in the radial direction of the rotation shaft 2. The first annular wall 32 is sealingly fixed to the base wall 31, extends from the base wall 31 in the axial direction of the rotating shaft 2 toward the first housing 51, and surrounds the partition annular wall 53 at intervals. The second annular wall 33 is sealingly fixed to the first annular wall 32, extends from the first annular wall 32 in the radial direction of the rotating shaft 2 toward the rotating shaft 2, and surrounds the rotating shaft 2 at intervals. The third annular wall 34 is tightly fixed to the second annular wall 33, extends from the second annular wall 33 toward the separating annular wall 53 in the axial direction of the rotating shaft 2, and surrounds the rotating shaft 2 at intervals. In the present embodiment, the liquid sealing space 30 defined by the ring groove unit 3 and the rotating shaft 2 is substantially the samethe cross section of the mold.
The barrier liquid 4 fills the liquid sealed space 30. The barrier liquid 4 may be, but is not limited to, water, animal and vegetable oils, mineral oils, synthetic oils, engine oils, synthetic esters, and other stable liquids with low vapor pressure.
the first housing 51 defines a reaction space 510 therein and communicating with the liquid-tight space 30. The second housing 52 is connected to the upper and upper peripheries of the first housing 51, and surrounds the ring groove unit 3 and the rotating shaft 2 at intervals to contain the barrier liquid 4. The upper end of the second housing 52 is open to communicate the inside and the outside. The second casing 52 includes an inner reservoir 521, which surrounds the rotating shaft 2 and is disposed below the ring groove unit 3 at intervals to contain the barrier liquid 4 overflowing the liquid sealing space 30. The partition ring wall 53 extends from the first housing 51 into the liquid seal space 30 in the radial direction of the rotating shaft 2, so that the liquid seal space 30 has a first region 301 and a second region 302 respectively located on both sides of the partition ring wall 53. The partition ring wall 53 includes a blocking end portion 531 extending into the liquid-tight space 30 in the axial direction of the rotating shaft 2 and surrounding the rotating shaft 2 at intervals to block the blocking liquid 4 from entering the reaction space 510. The ring groove unit 3 is disposed outside the first housing 51 and inside the second housing 52. In the present embodiment, the first region 301 is located on the upper side of the partition wall 53, and the second region 302 is located on the lower side of the partition wall 53.
The communication pipe 6 communicates the liquid sealed space 30 with the inside of the reservoir 521 inside the second housing 52 to replace the barrier liquid 4 in the liquid sealed space 30.
the rotating bed 7 is disposed in the reaction space 510 and connected to the rotating shaft 2.
When the rotating shaft 2 is externally driven to rotate so that the combination of the ring groove unit 3 and the rotating bed 7 rotates relative to the housing unit 5, the barrier liquid 4 is driven by centrifugal force to be distributed in the first area 301 and the second area 302 simultaneously, and the reaction space 510 is blocked from communicating with the gas outside the first shell 51. In this embodiment, when the ring groove unit 3 rotates, the reaction space 510 is in a negative pressure state (the gas pressure in the reaction space 510 is lower than the gas pressure outside the housing unit 5), and the liquid level of the barrier liquid 4 in the first region 301 is closer to the rotating shaft 2 than the liquid level in the second region 302.
Referring to fig. 2, a second embodiment of the rotary shaft fluid seal apparatus 1 of the present invention is similar to the first embodiment, except that the first annular wall 32 of the second embodiment extends radially and narrowly from the base wall 31 toward the first housing 51 and surrounds the separating annular wall 53 at intervals, and the third annular wall 34 of the second embodiment extends radially and narrowly from the second annular wall 33 toward the separating annular wall 53 and surrounds the rotary shaft 2 at intervals.
referring to fig. 3, a third embodiment of the rotary shaft fluid seal apparatus 1 of the present invention is similar to the first embodiment, except that the first housing 51 of the third embodiment includes a sleeve 511, which extends into the second housing 52 in the axial direction of the rotary shaft 2 for the rotary shaft 2 to pass through. The second housing 52 of the third embodiment is disposed above the first housing 51. The partition ring wall 53 extends from the sleeve 511 into the liquid seal space 30 in the radial direction of the rotary shaft 2. In this embodiment, the communication pipeline 6 is two, one of which is from the outside of the second casing 52, passes through the second casing 52 and passes through the partition annular wall 53 to connect with the first region 301, and the other is from the outside of the second casing 52, passes through the second casing 52, and connects with the inside of the reservoir 521.
Referring to fig. 4, a fourth embodiment of the rotary shaft fluid seal apparatus 1 of the present invention is similar to the third embodiment, except that when the combination of the ring groove unit 3 and the rotating bed 7 of the fourth embodiment rotates, the reaction space 510 is in a positive pressure state (the gas pressure in the reaction space 510 is greater than the gas pressure outside the housing unit 5), and the liquid level of the barrier fluid 4 in the second area 302 is closer to the rotary shaft 2 than the liquid level in the first area 301. Furthermore, when the barrier liquid 4 in the liquid-tight space 30 needs to be replaced, the barrier liquid 4 can be injected into the first area 301 of the liquid-tight space 30 by a pump.
Referring to fig. 5, a fifth embodiment of the rotary shaft fluid seal device 1 of the present invention is similar to the third embodiment, and the difference lies in that the rotary shaft fluid seal device 1 of the fifth embodiment is disposed upside down relative to the rotary shaft fluid seal device 1 of the third embodiment (the first region 301 is located at the lower side of the partition ring wall 53, and the second region 302 is located at the upper side of the partition ring wall 53), in the present embodiment, the fluid seal space 30 defined by the ring groove unit 3 and the rotary shaft 2 cooperating is substantially U-shaped in cross section. However, the reservoir 521 and the communication pipe 6 of the rotary shaft fluid seal apparatus 1 of the fifth embodiment are disposed below the first housing 51, the ring groove unit 3 of the fifth embodiment does not have the third ring wall 34 of the third embodiment, and the sleeve 511 of the fifth embodiment does not have the stop end 521 of the third embodiment.
Referring to fig. 6, a sixth embodiment of the rotary shaft fluid seal apparatus 1 of the present invention is similar to the fifth embodiment, except that when the combination of the ring groove unit 3 and the rotating bed 7 of the sixth embodiment rotates, the reaction space 510 is in a positive pressure state (the gas pressure of the reaction space 510 is greater than the gas pressure outside the housing unit 5), and the liquid level of the barrier liquid 4 in the second area 302 is closer to the rotary shaft 2 than the liquid level in the first area 301. Furthermore, when the barrier liquid 4 in the liquid-tight space 30 needs to be replaced, the barrier liquid 4 can be injected into the first area 301 of the liquid-tight space 30 by a pump.
In summary, in the rotating shaft liquid sealing apparatus 1 of the present invention, the annular groove unit 3 hermetically connected to the rotating shaft 2 and the separating annular wall 53 spaced apart from the rotating shaft 2 and the annular groove unit 3 are used, when the annular groove unit 3 rotates, the blocking liquid 4 can synchronously block the gas communication between the reaction space 510 and the outside of the first housing 51, and the reaction space 510 can be operated in cooperation with the negative pressure or the positive pressure. The rotary shaft liquid sealing device 1 of the invention does not need mechanical elements such as a spring, a blade and the like, does not need other driving devices, can circularly replace the barrier liquid 4 in the liquid sealing space 30, can greatly reduce the required consumables and energy, can avoid the reduction of the sealing degree of the rotary shaft 2 along with the gradual leakage of mechanical fatigue or corrosion, can be suitable for various operating conditions of peripheral speed, and can really achieve the aim of the invention.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.
Claims (11)
1. A rotating shaft liquid seal device is characterized in that: which comprises the following steps:
A rotating shaft;
A ring groove unit airtightly connected to the rotary shaft, cooperating with the rotary shaft to define a liquid-tight space therebetween;
The barrier liquid is filled in the liquid seal space; and
A housing unit, set up with this rotation axis and this annular unit interval, include:
a first shell defining a reaction space which is positioned in the interior and communicated with the liquid seal space,
a second housing connected to the first housing and surrounding the ring groove unit and the rotating shaft at intervals to contain the barrier liquid, and
The separating annular wall extends into the liquid seal space from the first shell, so that the liquid seal space is provided with a first area and a second area which are respectively positioned at two sides of the separating annular wall;
When the rotating shaft is driven by the outside to rotate so as to enable the annular groove unit to rotate relative to the shell unit, the barrier liquid is driven by centrifugal force to be distributed in the first area and the second area simultaneously, and the reaction space is blocked from being communicated with gas outside the first shell.
2. The rotary shaft wet seal device according to claim 1, wherein: the ring groove unit includes:
A base wall closely surrounding the rotation axis and extending in a radial direction of the rotation axis; and
A first annular wall, sealingly fixed to the base wall, extending from the base wall toward the first housing and surrounding the partition annular wall at intervals.
3. the rotary shaft wet seal device according to claim 2, wherein: the ring groove unit also comprises a second ring wall which is fixedly connected with the first ring wall in a sealing way, extends from the first ring wall to the rotating shaft and surrounds the rotating shaft at intervals.
4. The rotary shaft wet seal device according to claim 3, wherein: the first annular wall extends from the base wall toward the first housing in the axial direction of the rotary shaft, and the second annular wall extends from the first annular wall toward the rotary shaft in the radial direction of the rotary shaft.
5. the rotary shaft wet seal device according to claim 4, wherein: the annular groove unit also comprises a third annular wall which is fixedly connected with the second annular wall in a sealing way, extends from the second annular wall in the axial direction of the rotating shaft towards the separating annular wall and surrounds the rotating shaft at intervals.
6. The rotary shaft wet seal device according to claim 1, wherein: the partition ring wall includes a blocking end portion extending into the liquid seal space in the axial direction of the rotary shaft and surrounding the rotary shaft at intervals to block the blocking liquid from entering the reaction space.
7. The rotary shaft wet seal device according to claim 1, wherein: the first shell comprises a sleeve, and the sleeve extends into the second shell in the axial direction of the rotating shaft to allow the rotating shaft to penetrate through.
8. The rotary shaft wet seal device according to claim 7, wherein: the separating ring wall extends from the sleeve pipe to the outside in the radial direction of the rotating shaft and enters the liquid sealing space.
9. The rotary shaft wet seal device according to claim 1, wherein: the second shell comprises a liquid storage tank positioned inside, surrounds the rotating shaft, is arranged below the annular groove unit at intervals and is used for containing the barrier liquid overflowing the liquid seal space.
10. the rotary shaft wet seal device according to claim 9, wherein: the liquid seal device also comprises a communication pipeline which is communicated with the liquid seal space and the interior of the liquid storage tank so as to replace the barrier liquid in the liquid seal space.
11. The rotary shaft wet seal device according to claim 1, wherein: it also comprises a rotating bed which is arranged in the reaction space and is connected with the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611005502.9A CN108071806B (en) | 2016-11-15 | 2016-11-15 | Rotary shaft liquid seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611005502.9A CN108071806B (en) | 2016-11-15 | 2016-11-15 | Rotary shaft liquid seal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108071806A CN108071806A (en) | 2018-05-25 |
| CN108071806B true CN108071806B (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611005502.9A Active CN108071806B (en) | 2016-11-15 | 2016-11-15 | Rotary shaft liquid seal device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953581A (en) * | 2018-10-08 | 2018-12-07 | 广州达意隆包装机械股份有限公司 | A kind of star-wheel seat |
| CN109605027B (en) * | 2018-12-26 | 2021-05-07 | 广州精新泽自动化设备有限公司 | Submerged packaging mechanism of double-channel quick vibration damping seat assembly |
| CN109854751B (en) * | 2019-03-19 | 2024-01-26 | 江苏赛德力制药机械制造有限公司 | Sealing explosion-proof device for horizontal sedimentation centrifuge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB634855A (en) * | 1946-05-15 | 1950-03-29 | Westinghouse Electric Int Co | Improvements in or relating to sealing devices for rotating shafts |
| US4397795A (en) * | 1980-08-01 | 1983-08-09 | Thomas Broadbent & Sons Limited | Seal for rotary apparatus for gas-liquid contacting |
| CN204175965U (en) * | 2014-10-23 | 2015-02-25 | 张建国 | A kind of liquid sealing device |
| CN104741063A (en) * | 2013-12-27 | 2015-07-01 | 超重力有限公司 | Rotary packed bed device |
-
2016
- 2016-11-15 CN CN201611005502.9A patent/CN108071806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB634855A (en) * | 1946-05-15 | 1950-03-29 | Westinghouse Electric Int Co | Improvements in or relating to sealing devices for rotating shafts |
| US4397795A (en) * | 1980-08-01 | 1983-08-09 | Thomas Broadbent & Sons Limited | Seal for rotary apparatus for gas-liquid contacting |
| CN104741063A (en) * | 2013-12-27 | 2015-07-01 | 超重力有限公司 | Rotary packed bed device |
| CN104741066A (en) * | 2013-12-27 | 2015-07-01 | 超重力有限公司 | Mass transfer device with liquid seal device |
| CN204175965U (en) * | 2014-10-23 | 2015-02-25 | 张建国 | A kind of liquid sealing device |
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| Publication number | Publication date |
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| CN108071806A (en) | 2018-05-25 |
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