CN116412005A - Contact type sealing device for turbocharger - Google Patents
Contact type sealing device for turbocharger Download PDFInfo
- Publication number
- CN116412005A CN116412005A CN202310494373.8A CN202310494373A CN116412005A CN 116412005 A CN116412005 A CN 116412005A CN 202310494373 A CN202310494373 A CN 202310494373A CN 116412005 A CN116412005 A CN 116412005A
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- Prior art keywords
- cavity
- wall surface
- sealing
- support frame
- seal
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 81
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 4
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 abstract description 35
- 239000007789 gas Substances 0.000 description 32
- 239000002253 acid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004945 emulsification Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004939 coking Methods 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 230000008642 heat stress Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The present invention relates to a contact seal device for a turbocharger. The invention comprises a sealing component arranged in a groove, wherein the sealing component comprises a sealing piece, a first supporting frame, a second supporting frame and a base; the rotor shaft comprises a groove arranged in the first cavity; the bearing body comprises a first wall surface and a second wall surface which are oppositely arranged, wherein the first wall surface is positioned at one side of the first cavity close to the second cavity; the base is arranged in the groove through the sealing piece, and the first support frame and the second support frame are respectively connected with the base; the first supporting frame comprises a first sealing part which is in line contact with the first wall surface; the second supporting frame comprises a second sealing part which is in line contact with the second wall surface; alternatively, a slit gap is formed between the second sealing portion and the second wall surface. The invention can isolate the second cavity from the first cavity, completely prevent the high-temperature gas in the second cavity from entering the first cavity, and simultaneously completely prevent the lubricating oil and the high-temperature gas in the first cavity from entering the second cavity.
Description
Technical Field
The invention relates to the technical field of turbocharging, in particular to a contact type sealing device for a turbocharger.
Background
The turbocharger drives a turbine by utilizing the energy of exhaust gas discharged by the engine, the turbine drives an impeller to rotate, and gas enters an engine cylinder after being compressed. Almost all diesel engines, natural gas engines and most gasoline engines currently use turbo-charging technology.
Referring to fig. 1, the second chamber 5 is filled with a high-temperature gas, and the gas pressure and temperature are generally higher than those of the first chamber 4. The first cavity 4 is filled with lubricating oil and high-temperature gas, and the gas pressure is lower than the environment, but the temperature is higher than the environment. The first cavity 4 is not completely isolated from the second cavity 5. Under the action of the pressure difference, the lubricating oil and high-temperature gas in the first cavity 4 are prevented from entering the second cavity 5, but the high-temperature gas in the second cavity 5 enters the first cavity 4. In order to control leakage of gas and oil, a sealing ring is generally arranged between the first cavities 4 and 5, but this sealing manner cannot completely avoid high temperature gas from entering the first cavity 4. Meanwhile, under certain working conditions, such as idle speed, reverse dragging and the like, the pressure of the second cavity 5 is lower, and the lubricating oil enters the second cavity 5, so that the consumption of the lubricating oil is increased. The original structure enables a large amount of lubricating oil to enter the first cavity 4, increases the lubricating oil temperature and accelerates the deterioration of the lubricating oil. The high-temperature gas enters the first cavity 4 to generate heat transfer, so that the heat load of the bearing body 4 and the rotor shaft 3 is increased, the heat stress of the rotor shaft is increased, and the reliability is reduced; the temperature of the lubricating oil can be increased due to heat transfer, and impurities in the high-temperature gas can pollute the lubricating oil to accelerate the emulsification and degradation speed of the lubricating oil, especially when the high-temperature gas contains acid substances; the entry of high temperature gas increases the pressure in the first chamber 4, which can adversely affect the gravity return of the supercharger.
Disclosure of Invention
Therefore, the contact type sealing device for the turbocharger can isolate the second cavity from the first cavity, completely prevent high-temperature gas in the second cavity from entering the first cavity, and completely prevent lubricating oil and high-temperature gas in the first cavity from entering the second cavity.
In order to solve the technical problems, the invention provides a contact type sealing device for a turbocharger, which comprises a bearing body, a rotor shaft rotatably connected with the bearing body, a first cavity arranged on the bearing body and a second cavity positioned on one side of the first cavity; the contact type sealing device comprises a sealing component arranged in the groove, and the sealing component comprises a sealing piece, a first supporting frame, a second supporting frame and a base; the rotor shaft comprises a groove arranged in the first cavity; the bearing body comprises a first wall surface and a second wall surface which are oppositely arranged, wherein the first wall surface is positioned at one side of the first cavity close to the second cavity; the base is arranged in the groove through the sealing piece, and the first support frame and the second support frame are respectively connected to the base; the first supporting frame comprises a first sealing part, and the first supporting frame can be subjected to force for enabling the first sealing part to be close to the first wall surface so as to enable the first sealing part to be in line contact with the first wall surface and isolate the first cavity from the second cavity; the second support frame includes a second sealing portion capable of receiving a force to bring the second sealing portion close to the second wall surface so as to bring the second sealing portion into line contact with the second wall surface; alternatively, a slit gap is formed between the second sealing portion and the second wall surface.
In one embodiment of the invention, the seal is a unitary or split seal ring.
In one embodiment of the present invention, the first wall surface and/or the second wall surface are flat or concave spherical, and the first sealing portion and/or the second sealing portion are convex spherical.
In one embodiment of the invention, the first wall and/or the second wall is/are coated with a first high temperature, wear, grease and corrosion resistant coating.
In one embodiment of the invention, the first seal and/or the second seal is covered with a second high temperature, wear, grease and corrosion resistant coating.
In one embodiment of the invention, the slit gap is in the range of 0.2-5mm.
In one embodiment of the invention, the first support frame and/or the second support frame is a material having rigidity and elasticity.
In one embodiment of the present invention, the material of the first support frame and/or the second support frame is spring steel.
In one embodiment of the present invention, the gas pressure in the first chamber is different from the gas pressure in the second chamber.
In one embodiment of the invention, the first support frame and/or the second support frame are welded to the base.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the contact type sealing device for the turbocharger, provided by the invention, the sealing component is arranged, so that high-temperature gas in the second cavity is completely prevented from entering the first cavity, the heat load of the bearing body and the rotor shaft is reduced, the heat stress of the rotor shaft is reduced, and the reliability is improved; the temperature of the lubricating oil is reduced due to the reduction of heat transfer, so that the lubricating oil is prevented from being polluted by impurities in high-temperature gas, and the emulsification and degradation speeds of the lubricating oil are slowed down especially when the high-temperature gas contains acid substances; the pressure in the first cavity is prevented from being increased, and gravity oil return of the supercharger is facilitated. In addition, the lubricating oil in the first cavity is completely prevented from entering the second cavity, so that the consumption of the lubricating oil is reduced, the temperature of the lubricating oil is reduced, the emulsifying and degradation speeds of the lubricating oil are improved, and the problem of coking of the lubricating oil is solved.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
Fig. 1 is a schematic view of a contact seal device according to the present invention.
Fig. 2 is a schematic view of another contact seal of the present invention.
Fig. 3 is a schematic view of a line contact seal of the present invention.
Fig. 4 is a schematic view of another line contact seal of the present invention.
Description of the specification reference numerals:
1. a seal assembly; 1-1, a sealing member; 1-2, a first supporting frame; 1-3, a second supporting frame; 1-4, a base;
2. a rotor shaft; 2-1, grooves; 2-2, center line;
3. a bearing body; 3-1, a first wall surface; 3-2, a second wall surface;
4. a first cavity;
5. and a second cavity.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
In the present invention, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present invention, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present invention, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the present invention, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the invention can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1 to 4, a contact seal device for a turbocharger according to the present invention includes a bearing body 3, a rotor shaft 2 rotatably coupled to the bearing body 3, a first chamber 4 provided to the bearing body 3, and a second chamber 5 provided at one side of the first chamber 4;
the contact type sealing device comprises a sealing component 1 arranged in the groove 2-1, wherein the sealing component 1 comprises a sealing piece 1-1, a first supporting frame 1-2, a second supporting frame 1-3 and a base 1-4;
the rotor shaft 2 comprises a groove 2-1 arranged in the first cavity 4;
the bearing body 3 comprises a first wall surface 3-1 and a second wall surface 3-2 which are oppositely arranged, wherein the first wall surface 3-1 is positioned at one side of the first cavity 4 close to the second cavity 5;
the base 1-4 is arranged in the groove 2-1 through the sealing piece 1-1, and the first supporting frame 1-2 and the second supporting frame 1-3 are respectively connected with the base 1-4;
the first supporting frame 1-2 comprises a first sealing part, the first supporting frame 1-2 can be subjected to force for enabling the first sealing part to be close to the first wall surface 3-1, so that the first sealing part is in line contact with the first wall surface 3-1, and the first cavity 4 and the second cavity 5 are isolated;
the second supporting frame 1-3 comprises a second sealing part, and the second supporting frame 1-3 can be subjected to force for enabling the second sealing part to be close to the second wall surface 3-2 so as to enable the second sealing part to be in line contact with the second wall surface 3-2; alternatively, a slit gap is formed between the second sealing portion and the second wall surface 3-2.
Through the arrangement, the linear contact seal not only completely isolates the first cavity 4 from the second cavity 5, but also can reduce friction loss, and the control of the friction loss has an important influence on the mechanical efficiency of the supercharger, especially the low rotation speed, and the linear contact seal is a sealing mode which has both sealing performance and mechanical efficiency. In addition, high-temperature gas in the second cavity 5 is completely prevented from entering the first cavity 4, so that the thermal load of the bearing body 3 and the rotor shaft 2 is reduced, the thermal stress of the rotor shaft 2 is reduced, and the reliability is improved; the temperature reduction of the lubricating oil caused by heat transfer reduction is avoided, the lubricating oil is prevented from being polluted by impurities in high-temperature gas, and the emulsification and degradation speed of the lubricating oil is slowed down especially when the high-temperature gas contains acid substances; the pressure in the first cavity 4 is prevented from being increased, and gravity oil return of the supercharger is facilitated. In addition, the lubricating oil in the first cavity 4 is completely prevented from entering the second cavity 5, so that the consumption of the lubricating oil is reduced, the temperature of the lubricating oil is reduced, the emulsifying and degradation speed of the lubricating oil is improved, and the problem of coking of the lubricating oil is solved.
In this embodiment, the seal assembly 1 is mounted on the groove 2-1 of the rotor shaft 2 to rotate at a high speed in synchronization with the rotor shaft 2. In order to ensure the stability and reliability of the high-speed running of the rotor shaft 2, each part of the sealing assembly 1 is designed to be centrosymmetric to the central line 2-2 of the rotor shaft 2, and is integrated or split, and monomer balance is carried out after the sealing assembly is assembled in the groove 2-1 of the rotor shaft 2, and can be carried out on the existing supercharger equipment.
Specifically, the sealing element 1-1 is an integral or split sealing ring. The sealing ring deforms under the action of the extrusion force and is respectively in close contact with the side surface of the base 1-4 and the side surface of the groove 2-1. High-temperature gas in the second cavity 5 is prevented from entering the first cavity 4 through contact sealing, and meanwhile lubricating oil and high-temperature gas in the first cavity 4 are prevented from entering the second cavity 5.
In some embodiments, the sealing member 1-1 is made of a material which is resistant to high temperature, lubricating oil, acid substances and has certain elasticity, for example, a high-temperature resistant sealant. When the sealing element 1-1 adopts a split structure, the sealing element is stuck or assembled on the side surface of the base 1-4; when the integral type is adopted, the base is assembled on the base 1-4 in an interference fit manner.
Specifically, referring to fig. 3 and 4, the first seal portion and the first wall surface 3-1 do not have a sharp structure, and wear is prevented. The first wall surface 3-1 and/or the second wall surface 3-2 are flat or concave spherical, and the first sealing part and/or the second sealing part are convex spherical.
Specifically, in order to consider the wear resistance and the reliability, a coating of a high-temperature, wear-resistant and acid-resistant substance, such as a tungsten carbide coating, is added to the surface of the first wall surface 3-1 of the bearing body 3 in order to consider the wear resistance and the reliability; the surface of the second wall surface 3-2 of the bearing body 3 is added with a high-temperature resistant, wear-resistant and lubricating oil-resistant coating, such as a tungsten carbide coating; in order to reduce the cost, the coating is only positioned on the matching surface.
Specifically, the first support frame 1-2 and the second support frame 1-3 are made of materials with high temperature resistance, wear resistance and lubricating oil resistance, and the two materials may be different due to the difference of the working environments of the first support frame 1-2 and the second support frame 1-3. The working environment of the first support frame 1-2 is provided with lubricating oil and high-temperature gas, the working environment of the second support frame 1-3 is provided with lubricating oil, high-temperature gas, acid substances and the like, and in order to reduce the cost, a mode of adding a coating can also be considered, and the first sealing part and the second sealing part are coated with a coating which is high-temperature resistant, wear-resistant and lubricating oil resistant, such as a tungsten carbide coating.
Specifically, the slit gap is 0.2-5mm.
In particular, the first support frame 1-2 and the second support frame 1-3 are made of a material having rigidity and elasticity, such as spring steel.
Specifically, the bottoms of the first support frame 1-2 and the second support frame 1-3 are connected to the base 1-4 by welding or other assembly methods, and are approximately perpendicular to the surface of the base 1-4, and the first sealing portion and the second sealing portion are approximately parallel to the center line 2-2 of the rotor shaft 2.
Specifically, the angle between the first support frame 1-2 and the central line 2-2 of the rotor shaft 2 is reduced in the assembly process, and under the action of elastic force, the end part of the first support frame 1-2 is always in line contact with the wall surface of the bearing body 3.
Specifically, the angle between the second support frame 1-3 and the central line 2-2 of the rotor shaft 2 is reduced in the assembly process, and the end part of the second support frame 1-3 is always in line contact with the wall surface of the bearing body 3 under the action of elastic force.
Specifically, the gas pressure in the first cavity 4 is different from the gas pressure in the second cavity 5, and the highest temperature of the gas in the second cavity 5 can reach 900 ℃; the pressure in the second chamber 5 and the pressure in the first chamber 4 are not balanced, and the high-temperature gas flows under the driving of the pressure difference.
In some embodiments, as shown in fig. 1, the end of the first supporting frame 1-2 is in a convex spherical shape, the first wall surface 3-1 is in a plane, the surfaces of the first sealing part and the first wall surface 3-1 are coated with a tungsten carbide coating, and the two surfaces form a line contact type seal. The second sealing part is in a convex sphere shape, the second wall surface 3-2 is in a plane, the surfaces of the second wall surface are coated with tungsten carbide coatings, and the second wall surface form line contact type sealing.
In some embodiments, as shown in fig. 2, the first sealing part is in a convex spherical shape, the first wall surface 3-1 of the bearing body 3 is in a plane, the surfaces of the first sealing part and the first wall surface 3-1 are coated with tungsten carbide coating, the first sealing part and the first wall surface form line contact type sealing, the second sealing part is in a plane, the second wall surface 3-2 is in a plane, and a slit gap between the first sealing part and the second wall surface is 0.2mm.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (10)
1. A contact seal arrangement for a turbocharger comprising a bearing body (3), a rotor shaft (2) rotatably connected to the bearing body (3), a first cavity (4) provided in the bearing body (3) and a second cavity (5) located at one side of the first cavity (4);
the contact type sealing device is characterized by comprising a sealing component (1) arranged in the groove (2-1), wherein the sealing component (1) comprises a sealing piece (1-1), a first supporting frame (1-2), a second supporting frame (1-3) and a base (1-4);
the rotor shaft (2) comprises a groove (2-1) arranged in the first cavity (4);
the bearing body (3) comprises a first wall surface (3-1) and a second wall surface (3-2) which are oppositely arranged, wherein the first wall surface (3-1) is positioned at one side of the first cavity (4) close to the second cavity (5);
the base (1-4) is arranged in the groove (2-1) through the sealing piece (1-1), and the first support frame (1-2) and the second support frame (1-3) are respectively connected to the base (1-4);
the first support frame (1-2) comprises a first sealing part, the first support frame (1-2) can be subjected to force for enabling the first sealing part to be close to the first wall surface (3-1) so as to enable the first sealing part to be in line contact with the first wall surface (3-1) to isolate the first cavity (4) from the second cavity (5);
-the second support (1-3) comprises a second sealing portion, the second support (1-3) being able to receive a force bringing the second sealing portion close to the second wall (3-2) so as to bring the second sealing portion into line contact with the second wall (3-2); alternatively, a slit gap is formed between the second sealing portion and the second wall surface (3-2).
2. A contact seal arrangement for a turbocharger according to claim 1, characterized in that the seal (1-1) is a one-piece or split seal ring.
3. A contact seal arrangement for a turbocharger according to claim 1, characterized in that the first wall surface (3-1) and/or the second wall surface (3-2) are planar or concave spherical, and the first seal and/or the second seal are convex spherical.
4. A contact seal for a turbocharger according to claim 1, characterized in that the first wall (3-1) and/or the second wall (3-2) are covered with a first high temperature, wear, grease and corrosion resistant coating.
5. A contact seal arrangement for a turbocharger according to claim 1, wherein the first seal and/or the second seal is covered with a second high temperature, wear, grease and corrosion resistant coating.
6. A contact seal arrangement for a turbocharger according to claim 1, wherein the slit gap is in the range of 0.2-5mm.
7. A contact seal for a turbocharger according to claim 1, characterized in that the first support frame (1-2) and/or the second support frame (1-3) are of a rigid and elastic material.
8. A contact seal for a turbocharger according to claim 1, characterized in that the material of the first support frame (1-2) and/or the second support frame (1-3) is spring steel.
9. A contact seal arrangement for a turbocharger according to claim 1, characterized in that the gas pressure in the first chamber (4) and in the second chamber (5) are not identical.
10. A contact seal arrangement for a turbocharger according to claim 1, characterized in that the first support frame (1-2) and/or the second support frame (1-3) are welded to the base (1-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310494373.8A CN116412005A (en) | 2023-05-05 | 2023-05-05 | Contact type sealing device for turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310494373.8A CN116412005A (en) | 2023-05-05 | 2023-05-05 | Contact type sealing device for turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116412005A true CN116412005A (en) | 2023-07-11 |
Family
ID=87049409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310494373.8A Pending CN116412005A (en) | 2023-05-05 | 2023-05-05 | Contact type sealing device for turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116412005A (en) |
-
2023
- 2023-05-05 CN CN202310494373.8A patent/CN116412005A/en active Pending
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