CN116624422A - Mechanical seal composite open-cell foam medium sealing ring of turbine pump and turbine pump - Google Patents
Mechanical seal composite open-cell foam medium sealing ring of turbine pump and turbine pump Download PDFInfo
- Publication number
- CN116624422A CN116624422A CN202310790422.2A CN202310790422A CN116624422A CN 116624422 A CN116624422 A CN 116624422A CN 202310790422 A CN202310790422 A CN 202310790422A CN 116624422 A CN116624422 A CN 116624422A
- Authority
- CN
- China
- Prior art keywords
- ring
- cell foam
- mechanical seal
- open
- foam
- 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
- 239000006260 foam Substances 0.000 title claims abstract description 66
- 238000007789 sealing Methods 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000011010 flushing procedure Methods 0.000 claims description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 8
- 239000006261 foam material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000004227 thermal cracking Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of fluid sealing, in particular to a mechanical seal composite open-cell foam medium sealing ring of a turbine pump and the turbine pump. The mechanical sealing ring structure of the turbine pump is improved by embedding the open-cell foam medium, the heat transfer of the sealing end face is enhanced, and the temperature of the end face is reduced.
Description
Technical Field
The invention relates to the technical field of fluid sealing, in particular to a mechanical sealing composite open-cell foam medium sealing ring of a turbine pump and the turbine pump.
Background
Turbopumps are the core components of rocket engines, while mechanical seals are critical to their performance as an important component of the turbopump. The mechanical seal rotates at a high speed under the actual working condition, the end face of the seal ring can generate great friction heat and viscous shearing heat, and the stirring heat is added, so that the temperature of the end face is too high, and a series of problems such as thermal deformation of the end face, vaporization of an end face liquid film, thermal cracking of the end face and the like are caused. Therefore, in order to ensure the reliability of the turbo pump, a higher demand is placed on the mechanical seal of the turbo pump. Currently, the use of new seal ring structures is an effective way to study mechanical seals.
Qia et al (DOI: 10.1115/1.4006063) have built a mechanical seal three-dimensional thermodynamic model of a "U" shaped notch and have analyzed the thermal mixing and heat transfer characteristics within the "U" notch in detail. And discusses the heat transfer path and cooling mechanism of the gap. Zhang Weizheng et al (DOI: 10.11949/0438-1157.20221377) established a three-dimensional thermal fluid dynamic lubrication model of annular groove and spiral groove composite end face configuration, analyzed the law of influence of groove geometry parameters on the temperature field and sealing performance under the two models, and revealed the influence mechanism of the flow state on the end face groove cooling effect. Both documents essentially reduce the end surface temperature by changing the shape of the sealing end surface, but the two documents also belong to the traditional processing method, and have a certain cooling effect but are not obvious enough.
Disclosure of Invention
The invention aims to provide a mechanical seal composite open-cell foam medium sealing ring of a turbine pump and the turbine pump, wherein the sealing ring is embedded with open-cell foam medium to improve the mechanical sealing ring structure of the turbine pump, strengthen the heat transfer of the sealing end face and reduce the end face temperature.
The technical scheme of the invention is as follows: the utility model provides a compound open cell foam medium sealing ring of turbopump mechanical seal, includes mechanical seal's movable ring and quiet ring, the circumferencial direction evenly distributed of movable ring has the flushing hole that leads to the external diameter side from the ring bottom surface, and the external diameter side of movable ring and quiet ring all is provided with the ring channel, all imbeds foam medium in the ring channel of flushing hole and movable ring and quiet ring.
Further, the annular channel of the moving ring is arranged between the flushing hole and the end surface matched with the stationary ring, and the annular channel of the stationary ring is arranged between the bottom surface of the stationary ring and the end surface matched with the moving ring.
Further, the flushing hole is in an L-shaped straight hole, a straight inclined hole or a bent hole; the cross section of the flushing hole is square, round or polygonal.
Further, the aperture selection range of the flushing holes is 2-6 cm, and the number of the openings is 8-30; the axial height of the annular channel is 1-10mm, and the radial depth is 1-8mm.
Further, the foam medium is an open-cell foam metal material or an open-cell foam nonmetal material.
Further, the open-cell foam metal material is copper foam, aluminum foam or nickel foam; the open-cell foam nonmetallic material is foam graphite or foam ceramic
Further, the porosity of the open-cell foam medium is selected to be 50% -97%, and the pore density is selected to be 10 PPI-95 PPI.
Further, the foam medium between the flushing hole and the annular channel is connected in a pressure fixing, bonding or brazing mode.
Further, the mechanical seal of the turbine pump is a contact mechanical seal or a non-contact mechanical seal.
A turbine pump comprises the mechanical seal composite open-cell foam medium sealing ring of the turbine pump.
Compared with the prior art, the invention has the following advantages:
1. the sealing ring is embedded into the flushing hole and between the grooves of the tooth-shaped structures of the movable ring and the static ring through the open-cell foam medium, so that the mechanical sealing ring structure of the turbine pump is effectively improved, the heat convection between the sealing medium and the end face of the ring is enhanced, and the temperatures of the end face and the end face liquid film are reduced. The problems of thermal deformation, liquid film gasification, thermal cracking and the like generated by the end surfaces of the dynamic ring and the static ring when the mechanical seal of the turbine pump rotates at a high speed in the prior art are solved.
2. The sealing ring utilizes the advantages of large specific surface area, good permeability, strong turbulence effect, high heat transfer efficiency and the like of the open-cell foam material, and greatly reduces heat generated by friction and fluid viscosity shearing, thereby greatly prolonging the service life of the mechanical seal of the turbine pump.
3. The seal ring can be applied to a contact turbine pump mechanical seal or a non-contact turbine pump mechanical seal.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is a schematic view of an "L" shaped flushing hole in the moving ring of the present invention;
FIG. 3 is a schematic view of a straight bore of greater than 90 degrees in the moving ring of the present invention;
FIG. 4 is a schematic view of a straight inclined hole in the moving ring of the present invention;
FIG. 5 is a schematic view of a circular curved bore in a moving ring according to the present invention;
FIG. 6 is a schematic representation of the structure of an open cell foam media of the present invention with porosity;
FIG. 7 is a schematic representation of another open cell foam media structure of the present invention;
FIG. 8 is a schematic representation of the structure of a double layer open cell foam media of the present invention;
in the figure: the device comprises an A-moving ring, a B-stationary ring, a 1-ring bottom surface, a 2-outer diameter side, 3- 'L' -shaped flushing holes, 4-annular channels, 5-foam media, 6-straight holes with the angle of more than 90 degrees, 7- 'straight' -shaped inclined holes and 8-round bent holes.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Referring to fig. 1 to 8
The utility model provides a compound open cell foam medium sealing ring of turbopump mechanical seal, includes mechanical seal's rotating ring A and quiet ring B, the circumferencial direction evenly distributed of rotating ring has the flushing hole that leads to rotating ring external diameter side 2 from ring bottom surface 1, and the external diameter side of rotating ring and quiet ring all is provided with the ring channel 4 that forms "tooth" column structure, all imbeds foam medium 5 in the ring channel of flushing hole and rotating ring and quiet ring. When the sealing moving ring rotates at a high speed, under the drive of the centrifugal force of fluid, a low-temperature medium in the sealing cavity flows in from the opening of the bottom surface of the moving ring, the sealing medium is fully contacted with the foam material, and then flows back to the sealing cavity from the opening of the outer diameter side; when the movable ring rotates at a high speed, the traction sealing cavity medium flows outside the dynamic and static rings, so that the low-temperature sealing medium enters the foam material. Because the foam material has the advantages of large specific surface area, good permeability, strong turbulence effect, high heat transfer efficiency and the like, the sealing ring structure is greatly improved, the heat convection between the sealing medium and the ring end face is enhanced, and the temperature of the sealing ring end face is reduced.
In this embodiment, the annular channel of the moving ring is disposed between the flushing hole and the end face that mates with the stationary ring, and the annular channel of the stationary ring is disposed between the ring bottom face of the stationary ring and the end face that mates with the moving ring.
In this embodiment, the flushing hole is an "L" shaped straight hole (refer to fig. 2), an "in-line" inclined hole (refer to fig. 3) or a curved hole (refer to fig. 5), or may be a straight hole at other angles (refer to fig. 4); the section shape of the flushing hole is square, round or polygonal.
In this embodiment, the aperture selection range of the flushing holes is 2-6 cm, and the number of the openings is 8-30.
In this embodiment, the axial height of the annular channel is 1-10mm, and the radial depth is 1-8mm.
In this embodiment, the foam medium is an open-cell foam metal material, such as copper foam, aluminum foam, or nickel foam. The foam medium may also be an open-cell foam nonmetallic material, such as graphite foam or ceramic foam.
In this embodiment, the porosity of the open-cell foam medium is selected to be 50% -97%, and the pore density is selected to be 10 ppi-95 ppi.
In this embodiment, the foam medium in the flushing hole, and the foam medium in the annular channels of the moving ring and the static ring are connected with the annular surface by pressure fixing, bonding or brazing.
In this embodiment, the mechanical seal of the turbo pump may be a contact type mechanical seal or a non-contact type mechanical seal.
Working principle:
when the mechanical seal moving ring of the turbine pump rotates at a high speed, the low-temperature medium in the seal cavity flows in from the ring bottom surface open pore of the moving ring under the drive of the centrifugal force of fluid, fully contacts with the open-pore foam material, and flows back to the seal cavity from the outer diameter side open pore. Meanwhile, the dynamic ring rotates to drag the sealing cavity medium to flow outside the dynamic ring and the static ring, so that the low-temperature sealing medium enters the foam material, the foam material has large specific surface area, good permeability, strong turbulence effect and high heat transfer efficiency, and the heat convection between the sealing medium and the end face of the ring is enhanced, thereby reducing the temperature of the end face of the sealing ring. Compared with a similar fluid dynamic pressure type mechanical seal structure, the mechanical seal structure of the invention greatly reduces heat generated by friction and fluid viscosity shearing, thereby greatly prolonging the service life of the mechanical seal of the turbine pump.
A turbine pump comprises the mechanical seal composite open-cell foam medium sealing ring of the turbine pump.
The foregoing is merely illustrative of the principles and advantages of the invention, and it will be apparent to those skilled in the art that, in light of the teachings of this invention, numerous modifications can be made to the mechanical seal composite open cell foam media seal ring of a turbopump without requiring undue effort and without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a compound open cell foam medium sealing ring of turbopump mechanical seal, includes mechanical seal's rotating ring and quiet ring, its characterized in that, the circumferencial direction evenly distributed of rotating ring has the flushing hole that leads to the external diameter side from the ring bottom surface, and the external diameter side of rotating ring and quiet ring all is provided with the annular channel, all imbeds foam medium in the annular channel of flushing hole and rotating ring and quiet ring.
2. The mechanical seal composite open-cell foam media seal ring of a turbopump of claim 1 wherein the annular channel of the moving ring is disposed between the flushing orifice and the end face that mates with the stationary ring and the annular channel of the stationary ring is disposed between the ring bottom face of the stationary ring and the end face that mates with the moving ring.
3. The mechanical seal composite open-cell foam media sealing ring of a turbopump according to claim 1 or 2, wherein the flushing holes are in the form of "L" shaped straight holes, "straight" inclined holes or curved holes; the cross section of the flushing hole is square, round or polygonal.
4. The mechanical seal composite open-cell foam medium sealing ring of the turbine pump according to claim 3, wherein the aperture of the flushing holes is selected to be 2-6 cm, and the number of the open cells is selected to be 8-30; the axial height of the annular channel is 1-10mm, and the radial depth is 1-8mm.
5. The mechanical seal composite open cell foam media seal ring of claim 1, wherein said foam media is an open cell foam metal material or an open cell foam non-metal material.
6. The mechanical seal composite open-cell foam media seal ring of a turbopump of claim 5, wherein said open-cell foam metal material is copper foam, aluminum foam or nickel foam; the open-cell foam nonmetallic material is foam graphite or foam ceramic.
7. The mechanical seal composite open-cell foam media sealing ring of a turbo pump of claim 5 or 6, wherein the open-cell foam media has a porosity in the range of 50% -97% and a cell density in the range of 10 ppi-95 ppi.
8. The mechanical seal composite open-cell foam medium sealing ring of the turbopump according to claim 1, wherein foam medium between the flushing holes and the annular channels is connected in a pressure fixing, bonding or brazing mode.
9. The mechanical seal composite open-cell foam media seal ring of a turbopump of claim 1, wherein the mechanical seal of the turbopump is a contact mechanical seal or a non-contact mechanical seal.
10. A turbopump comprising a mechanically sealed composite open cell foam media seal ring of claim 1, 2, 4, 5, 6, 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310790422.2A CN116624422A (en) | 2023-06-30 | 2023-06-30 | Mechanical seal composite open-cell foam medium sealing ring of turbine pump and turbine pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310790422.2A CN116624422A (en) | 2023-06-30 | 2023-06-30 | Mechanical seal composite open-cell foam medium sealing ring of turbine pump and turbine pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116624422A true CN116624422A (en) | 2023-08-22 |
Family
ID=87641987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310790422.2A Pending CN116624422A (en) | 2023-06-30 | 2023-06-30 | Mechanical seal composite open-cell foam medium sealing ring of turbine pump and turbine pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116624422A (en) |
-
2023
- 2023-06-30 CN CN202310790422.2A patent/CN116624422A/en active Pending
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