CN217603350U - Low-temperature high-pressure liquid oxygen rotary shaft seal - Google Patents
Low-temperature high-pressure liquid oxygen rotary shaft seal Download PDFInfo
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- CN217603350U CN217603350U CN202221942851.4U CN202221942851U CN217603350U CN 217603350 U CN217603350 U CN 217603350U CN 202221942851 U CN202221942851 U CN 202221942851U CN 217603350 U CN217603350 U CN 217603350U
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- fillet
- support ring
- rotary shaft
- liquid oxygen
- shaft seal
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Abstract
The utility model belongs to the technical field of the bearing seal technique and specifically relates to a rotatory bearing seal of low temperature high pressure liquid oxygen, including outer skeleton, the parcel has first support ring in the outer skeleton, the below of first support ring sets up two modified polytetrafluoroethylene seal lips, two modified polytetrafluoroethylene seal lip is located the inboard of outer skeleton, two modified polytetrafluoroethylene seal lip is provided with inner frame and second support ring, outer skeleton parcel is in the inner frame and the second support ring outside. The utility model has the characteristics of bearing seal life has been prolonged.
Description
Technical Field
The utility model relates to a bearing seal technical field especially relates to a rotatory bearing seal of low temperature high pressure liquid oxygen.
Background
With the rapid development of civil aviation industry in recent years, the demand of low-temperature liquid oxygen engines is more and more, the traditional sealing system is challenged under the conditions of low temperature of-180 ℃ and high pressure of 4Mpa, particularly the rotating speed of the low-temperature liquid oxygen engine reaches 30000 r/min, and the traditional rubber has large friction coefficient and short service life under oil-free lubrication.
The oil blanket divide into rubber oil blanket, polytetrafluoroethylene oil blanket, general stopper seal etc. and traditional rubber oil blanket needs have the oil lubrication withstand voltage to reach not more than 4Mpa, and traditional polytetrafluoroethylene oil blanket is easily embrittled at low temperature-180, and traditional general stopper seals the external diameter and does not have the metal framework to support, and the external diameter is rotatory with the axle under high-speed rotation, and life all is short, in order to prolong the life of oil blanket, we propose a low temperature high pressure liquid oxygen rotary shaft seal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect of short service life in the prior art and providing a low-temperature high-pressure liquid oxygen rotary shaft seal.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the design is a low-temperature high-pressure liquid oxygen rotary shaft seal, which comprises an outer framework, wherein a first supporting ring is wrapped in the outer framework, two modified polytetrafluoroethylene sealing lips are arranged below the first supporting ring and are located on the inner side of the outer framework, the two modified polytetrafluoroethylene sealing lips are provided with an inner framework and a second supporting ring, and the outer framework is wrapped on the outer sides of the inner framework and the second supporting ring.
Preferably, the outer framework is provided with a first fillet, a second fillet and a third fillet, and the third fillet is attached to one of the modified polytetrafluoroethylene sealing lips.
Preferably, a fourth fillet, a fifth fillet and a sixth fillet are arranged on the first support ring.
Preferably, a seventh fillet, an eighth fillet and a ninth fillet are arranged on the modified polytetrafluoroethylene sealing lip.
Preferably, a tenth fillet, an eleventh fillet and a twelfth fillet are arranged on the inner skeleton, and the eleventh fillet is attached to the other modified polytetrafluoroethylene sealing lip.
Preferably, a thirteenth fillet, a first plane and a fourteenth fillet are arranged on the second support ring.
Preferably, the outer framework, the first support ring, the inner framework and the second support ring are all made of stainless steel materials.
The utility model provides a pair of low temperature high pressure liquid oxygen rotary shaft seal, beneficial effect lies in: the sealing lip is made of modified polytetrafluoroethylene, so that the friction coefficient of the sealing lip in contact with a rotating shaft can be reduced, the dry friction heat generation is reduced, and the modified polytetrafluoroethylene material is adopted to prevent the low-temperature damage, so that the sealing performance at low temperature of-180 ℃ is ensured, meanwhile, the support framework adopts the design of the inverted arc angle, the sealing performance under high pressure of 4Mpa is improved, the leakage rate is greatly reduced, and the service life of the shaft seal is prolonged.
Drawings
Fig. 1 is a schematic structural view of a low-temperature high-pressure liquid oxygen rotary shaft seal provided by the present invention;
FIG. 2 is a schematic structural view of an outer frame part of a rotary shaft seal with low temperature and high pressure liquid oxygen provided by the present invention;
fig. 3 is a schematic structural view of a first support ring portion of a low-temperature high-pressure liquid oxygen rotary shaft seal according to the present invention;
FIG. 4 is a schematic structural view of a low-temperature high-pressure liquid oxygen rotary shaft seal modified polytetrafluoroethylene sealing lip part provided by the present invention;
fig. 5 is a schematic structural view of an inner frame part of the low-temperature high-pressure liquid oxygen rotary shaft seal provided by the utility model;
fig. 6 is a schematic structural view of a second support ring portion of the low-temperature high-pressure liquid oxygen rotary shaft seal according to the present invention;
in the figure: the outer skeleton 1, first fillet 11, second fillet 12, third fillet 13, first supporting ring 2, fourth fillet 21, fifth fillet 22, sixth fillet 23, modified polytetrafluoroethylene seal lip 3, seventh fillet 31, eighth fillet 32, ninth fillet 33, inner skeleton 4, tenth fillet 41, eleventh fillet 42, twelfth fillet 43, second supporting ring 5, thirteenth fillet 51, first plane 52, fourteenth fillet 53.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
Referring to fig. 1-6, a rotatory bearing seal of low temperature high pressure liquid oxygen, including exoskeleton 1, the parcel has first support ring 2 in the exoskeleton 1, and the below of first support ring 2 sets up two modified polytetrafluoroethylene seal lips 3, and modified polytetrafluoroethylene seal lip 3 reduces the coefficient of friction with the pivot contact to be favorable to prolonging the life of bearing seal, adopt modified polytetrafluoroethylene material to make simultaneously, prevent the condition of low temperature damage, thereby guaranteed the sealing performance under low temperature-180 ℃.
Two modified polytetrafluoroethylene seal lips 3 are located the inboard of exoskeleton 1, and two modified polytetrafluoroethylene seal lips 3 are provided with inner frame 4 and second support ring 5, and exoskeleton 1 parcel is in the inner frame 4 and the 5 outsides of second support ring, and exoskeleton 1, first support ring 2, inner frame 4, second support ring 5 are stainless steel material and make, and it is as an organic whole with 3 pressfittings of modified polytetrafluoroethylene seal lip, have improved whole rigidity, guarantee the stability under the high-speed high pressure low temperature environment.
Be provided with first fillet 11, second fillet 12, third fillet 13 on the exoskeleton 1, third fillet 13 with one of them modified polytetrafluoroethylene seal lip 3 laminates mutually, and modified polytetrafluoroethylene seal lip 3 is supported by the laminating of third fillet 13 and eleventh fillet 42 respectively, has improved the withstand voltage ability under the high pressure 4Mpa environment.
The contact points of the modified polytetrafluoroethylene sealing lip 3 and the metal framework are respectively a second fillet 12 and a tenth fillet 41, the tear resistance of the sealing lip is improved under the high-pressure condition, so that the shaft seal is at the low temperature of-180 ℃, the high pressure of 4Mpa, and the rotating speed is 30000 turns/minute, the leakage rate is greatly reduced, and the service life of the shaft seal is prolonged.
The first support ring 2 is provided with a fourth fillet 21, a fifth fillet 22 and a sixth fillet 23.
The modified polytetrafluoroethylene sealing lip 3 is provided with a seventh fillet 31, an eighth fillet 32 and a ninth fillet 33.
The inner framework 4 is provided with a tenth round angle 41, an eleventh round angle 42 and a twelfth round angle 43, and the eleventh round angle 42 is attached to the other modified polytetrafluoroethylene sealing lip 3.
Example 2
Referring to fig. 6, as another preferred embodiment of the present invention, on the basis of embodiment 1, a thirteenth fillet 51, a first plane 52, and a fourteenth fillet 53 are provided on the second support ring 5, and the first plane 52 effectively keeps away from the space and separates, thereby reducing the heat accumulation under the high speed condition and prolonging the service life.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a low temperature high pressure liquid oxygen rotary shaft seal, includes exoskeleton (1), its characterized in that, the parcel has first support ring (2) in exoskeleton (1), the below of first support ring (2) sets up two modified polytetrafluoroethylene seal lips (3), two modified polytetrafluoroethylene seal lip (3) are located exoskeleton (1)'s inboard, two modified polytetrafluoroethylene seal lip (3) are provided with inner frame (4) and second support ring (5), exoskeleton (1) parcel is in the inner frame (4) and second support ring (5) outside.
2. The rotary shaft seal of low temperature and high pressure liquid oxygen according to claim 1, characterized in that the outer frame (1) is provided with a first fillet (11), a second fillet (12) and a third fillet (13), and the third fillet (13) is attached to one of the modified polytetrafluoroethylene sealing lips (3).
3. The rotary shaft seal of claim 2, wherein the first support ring (2) is provided with a fourth fillet (21), a fifth fillet (22) and a sixth fillet (23).
4. The rotary shaft seal of low temperature and high pressure liquid oxygen according to claim 1, characterized in that the modified polytetrafluoroethylene sealing lip (3) is provided with a seventh fillet (31), an eighth fillet (32) and a ninth fillet (33).
5. The rotary shaft seal according to any one of claims 1 to 4, characterized in that the inner frame (4) is provided with a tenth fillet (41), an eleventh fillet (42) and a twelfth fillet (43), and the eleventh fillet (42) is attached to another modified PTFE seal lip (3).
6. The rotary shaft seal of low temperature and high pressure liquid oxygen according to claim 5, characterized in that the second support ring (5) is provided with a thirteenth fillet (51), a first plane (52), and a fourteenth fillet (53).
7. The rotary shaft seal of low temperature and high pressure liquid oxygen according to claim 1, wherein the outer frame (1), the first support ring (2), the inner frame (4), and the second support ring (5) are made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221942851.4U CN217603350U (en) | 2022-07-27 | 2022-07-27 | Low-temperature high-pressure liquid oxygen rotary shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221942851.4U CN217603350U (en) | 2022-07-27 | 2022-07-27 | Low-temperature high-pressure liquid oxygen rotary shaft seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217603350U true CN217603350U (en) | 2022-10-18 |
Family
ID=83593520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221942851.4U Active CN217603350U (en) | 2022-07-27 | 2022-07-27 | Low-temperature high-pressure liquid oxygen rotary shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217603350U (en) |
-
2022
- 2022-07-27 CN CN202221942851.4U patent/CN217603350U/en active Active
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