CN215256957U - Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump - Google Patents
Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump Download PDFInfo
- Publication number
- CN215256957U CN215256957U CN202121706342.7U CN202121706342U CN215256957U CN 215256957 U CN215256957 U CN 215256957U CN 202121706342 U CN202121706342 U CN 202121706342U CN 215256957 U CN215256957 U CN 215256957U
- Authority
- CN
- China
- Prior art keywords
- diameter part
- mechanical seal
- sheath
- pump
- centrifugal pump
- 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.)
- Active
Links
Images
Landscapes
- Mechanical Sealing (AREA)
Abstract
The utility model discloses a-196 ℃ low temperature centrifugal pump mechanical seal sweeps new installation, including rotary part and quiet ring subassembly, sheath, the sheath is impressed in quiet ring subassembly, quiet ring subassembly is connected at the interior terminal surface of pump case. The rotating part comprises a rotating ring and a copper gasket, the end faces of the rotating ring and the stationary ring assembly are attached to form a sealing surface, the sheath comprises a large-diameter part and a small-diameter part, a through groove is formed in the inner wall of the large-diameter part, one end of the through groove extends to the small-diameter part and is communicated with the outside of the small-diameter part, and a blowing hole communicated with the sheath is formed in the pump shell. The utility model discloses mechanical seal "sweeps" efficiency is higher, and protection static charge produces and heat balance's function still completely keeps.
Description
Technical Field
The utility model relates to a mechanical seal purging device of a low-temperature centrifugal pump at the temperature of-196 ℃.
Background
The low-temperature centrifugal pump at the temperature of-196 ℃ is important equipment for conveying liquefied gases such as liquid oxygen, liquid nitrogen, liquid argon, LNG and the like.
The technology of the cryogenic low-temperature centrifugal pump is originated in Europe and America, the technology is widely used in industrial production for less than one hundred years, and the special low-temperature pump is reformed and enters China. In China, air separation plant production enterprises such as Hangzhou oxygen, Xinya and three-well are from imitation to self-design production of the pumps, but the quality difference with products in Europe and America is very large, and the Europe and America are still in absolute monopoly on the technology and market of domestic cryogenic pumps.
The essential idea is to take the essence and to see the gap, and the practical thing is to examine and reform the problems in European and American products, so that the gap between the new energy key equipment of the cryogenic low-temperature centrifugal pump and developed countries can be reduced as soon as possible.
All cryogenic cryopumps (a significant portion of which are operated discontinuously) have a dedicated purge process prior to start-up.
The purging is to introduce dry and clean nitrogen with the pressure of 0.05-0.1 MPa (some nitrogen needs to pass through a filter) from an inlet pipeline and an outlet pipeline arranged on the cryopump, and replace the atmosphere entering a mechanical seal space arranged in the pump head due to parking. Air entering an inner hole of the mechanical seal when the pump is stopped has moisture, the moisture components are not swept out, when a precooling process is carried out before the pump is started, ice can be formed between sealing surfaces of the mechanical seal and the inner wall of the metal corrugated pipe, when the pump is started, the mechanical seal can be damaged by the frozen and viscous mechanical sealing surface, and an ice layer attached to the inner layer of the metal corrugated pipe can damage the elastic compensation capacity, so that large leakage can be caused when the pump is started on site, and the pump is very dangerous.
The blowing time of the low-temperature centrifugal pump before starting and precooling is greatly different according to the difference of climate and geographic environment, and generally needs more than 5-10 minutes.
The production site often has the case that the mechanical seal of the cryogenic centrifugal pump is damaged or the driving fails because the 'purging' is not thorough, which is a great energy and economic loss.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the prior art, the utility model provides a mechanical seal purging device of a low-temperature centrifugal pump at the temperature of-196 ℃.
The utility model provides a technical scheme that above-mentioned technical problem provided is: the mechanical seal purging novel device of the low-temperature centrifugal pump at the temperature of-196 ℃ comprises a rotating part, a static ring assembly and a sheath, wherein the sheath is pressed into the static ring assembly, the static ring assembly is connected to the inner end face of a pump shell, the rotating part comprises a rotating ring and a copper gasket, the end faces of the rotating ring and the static ring assembly are attached to form a sealing face, the sheath comprises a large-diameter part and a small-diameter part, a through groove is formed in the inner wall of the large-diameter part, one end of the through groove extends to the small-diameter part and is communicated with the outside of the small-diameter part, and a purging hole communicated with the sheath is formed in the pump shell.
The further technical scheme is that the ventilating slot is an arc-shaped slot. (not limited to only through groove shape)
The further technical scheme is that the sheath is a bronze sheath.
The technical scheme is that a sealing ring is arranged between the pump shell and the static ring component.
The utility model discloses following beneficial effect has: the utility model discloses mechanical seal "sweeps" efficiency is higher, and protection static charge produces and heat balance's function still completely keeps.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
fig. 2 is a schematic structural diagram of the present invention;
FIG. 3 is a front view of the sheath;
fig. 4 is a sectional view of fig. 3.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 2-3, the novel mechanical seal purging device of the-196 ℃ low-temperature centrifugal pump of the present invention comprises a rotating component, a stationary ring component 2, a sheath 3 and a pump case 4, wherein the sheath 3 is pressed into the stationary ring component 2, the stationary ring component 2 is connected to the inner end surface of the pump case 4, the rotating component comprises a rotating ring 8 and a copper gasket 10, the rotating ring 8 and the copper gasket 10 are combined under the axial action of pressing the copper sleeve to form a mechanically sealed rotating component, the rotating component is installed on the pump shaft 1 and rotates synchronously with the pump shaft 1, the end surface of the rotating ring 8 and the stationary ring component 2 is attached to form a sealing surface, the sheath 3 comprises a large-diameter part and a small-diameter part, a through groove 5 is arranged on the inner wall of the large-diameter part, one end of the through groove 5 extends to the small-diameter part and is communicated with the outside of the small-diameter part, a purging hole 7 communicated with the inner cavity of the sheath 3 is arranged on the pump case 4, the sheath 3 is a bronze sheath, and a sealing ring 6 is arranged between the pump shell 4 and the static ring component 2.
The utility model discloses specific process of sweeping does: during purging, purge gas enters from a purge hole of the pump shell 4, then passes through a gap between the sheath 3 and the through groove and the metal corrugated pipe, and is blown to the static ring component 2, the inner diameter space of the metal corrugated end is attached to the sealing surface of the mechanical seal, and moisture is rapidly replaced by the purge gas through the gap between the sheath 3 and the pump shaft and is discharged from an outlet.
In field use, the mechanical seal "purge" of this embodiment is very efficient, typically controlled at 3 minutes after purge, with the cryopump beginning the pre-cool process. The cryopump can be normally driven as long as the 'precooling' process is correctly completed.
As shown in fig. 2, in the present embodiment, the ventilation slot 5 is an arc slot.
In this embodiment, the jacket 3 is made of bronze, and the functions of electrostatic charge generation protection and heat balance protection are still completely maintained.
The above description is not intended to limit the present invention in any way, and the present invention has been disclosed in the above embodiments, but not intended to limit the present invention, and any person skilled in the art can make some changes or modify equivalent embodiments with equivalent changes without departing from the scope of the present invention, and any simple modification, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the present invention.
Claims (4)
1. The mechanical seal purging novel device of the low-temperature centrifugal pump at the temperature of-196 ℃ comprises a rotating part, a static ring component (2) and a jacket (3), wherein the jacket (3) is pressed into the static ring component (2), the static ring component (2) is connected into a pump shell (4), the rotating part comprises a rotating ring (8) and a copper gasket (10), the rotating ring (8) is attached to the end face of the static ring component (2) to form a sealing surface, the mechanical seal purging novel device is characterized in that the jacket (3) comprises a large-diameter part and a small-diameter part, a through groove (5) is formed in the inner wall of the large-diameter part, one end of the through groove (5) extends to the small-diameter part and is communicated with the outside of the small-diameter part, and a purging hole (7) communicated with the jacket (3) is formed in the pump shell (4).
2. Novel mechanical seal purging device of a cryogenic centrifugal pump at-196 ℃ according to claim 1, characterized in that the through groove (5) is an arc-shaped groove.
3. Novel mechanical seal purging device of a cryogenic centrifugal pump at-196 ℃ according to claim 1, characterized in that the sheath (3) is a bronze sheath.
4. Novel mechanical seal purging device of a centrifugal pump at a low temperature of-196 ℃ according to claim 3, characterized in that a sealing ring (6) is arranged between the pump shell (4) and the static ring component (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121706342.7U CN215256957U (en) | 2021-07-26 | 2021-07-26 | Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121706342.7U CN215256957U (en) | 2021-07-26 | 2021-07-26 | Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215256957U true CN215256957U (en) | 2021-12-21 |
Family
ID=79494739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121706342.7U Active CN215256957U (en) | 2021-07-26 | 2021-07-26 | Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215256957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006484A (en) * | 2023-01-10 | 2023-04-25 | 北京伯肯节能科技股份有限公司 | Anti-icing and anti-blocking protection system of centrifugal hydrogen circulating pump |
-
2021
- 2021-07-26 CN CN202121706342.7U patent/CN215256957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006484A (en) * | 2023-01-10 | 2023-04-25 | 北京伯肯节能科技股份有限公司 | Anti-icing and anti-blocking protection system of centrifugal hydrogen circulating pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215256957U (en) | Mechanical seal purging device of-196 ℃ low-temperature centrifugal pump | |
| CN100467874C (en) | Low-pressure type orbiting vane compressor | |
| CN108023451B (en) | Positive pressure explosion-proof generator | |
| CN100472072C (en) | Orbiting vane compressor | |
| CN105221431A (en) | Compressor assembly | |
| CN204357709U (en) | Rotary compressor | |
| CN110094967B (en) | Vacuum furnace using dry screw pump | |
| CN100404867C (en) | Hermetic rotary compressor | |
| CN103306975A (en) | Minitype refrigeration compressor | |
| WO2020248623A1 (en) | Water-lubricated screw air compressor | |
| CN102748282B (en) | Horizontal vortex air compressor for oil injection | |
| CN212130802U (en) | Barrel-type low-temperature centrifugal pump | |
| CN201910689U (en) | Positive-pressure shell type three-phase asynchronous motor | |
| CN205876719U (en) | Twin -screw liquefied gas turbocharging system based on dry gas is sealed | |
| CN201723449U (en) | Seal welding structure for spatial separation in compressor | |
| CN103047147B (en) | Oil circuit structure of oil-injection scroll compressor | |
| CN113446206A (en) | High negative pressure vacuum pump capable of working in two directions | |
| CN205089624U (en) | Low -backpressure compressor | |
| CN210509524U (en) | One-way rotating shaft of oil-electricity hybrid single-disc compressor | |
| CN219282010U (en) | Centrifugal turbine type acetylene compressor unit | |
| KR100290711B1 (en) | Rotary Compressor for two step compress | |
| CN219639046U (en) | Double-screw type process vapor compressor for fine chemical engineering heat pump rectification process | |
| CN104295495A (en) | Fully-sealed scroll compressor and assembly method thereof | |
| CN215805263U (en) | Single-stage compressor for start-up of 30 ten thousand tons of coal-to-ethylene glycol | |
| CN101535599A (en) | Fluid machinery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |