CN112324558A - Perforated bolt, supercharger oil inlet pipe and turbocharger structure - Google Patents
Perforated bolt, supercharger oil inlet pipe and turbocharger structure Download PDFInfo
- Publication number
- CN112324558A CN112324558A CN202011214847.1A CN202011214847A CN112324558A CN 112324558 A CN112324558 A CN 112324558A CN 202011214847 A CN202011214847 A CN 202011214847A CN 112324558 A CN112324558 A CN 112324558A
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- China
- Prior art keywords
- oil
- filtering
- turbocharger
- bolt
- oil inlet
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims abstract description 154
- 238000001914 filtration Methods 0.000 claims abstract description 85
- 239000010687 lubricating oil Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/14—Lubrication of pumps; Safety measures therefor
-
- 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
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- 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
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a perforated bolt, a supercharger oil inlet pipe and a turbocharger structure, wherein the perforated bolt comprises: a bolt body and a filter device; the bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet, the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity. The invention provides a perforated bolt, a supercharger oil inlet pipe and a turbocharger structure, and aims to solve the problem that in the prior art, impurities of the supercharger oil inlet pipe are easily brought into the turbocharger to influence the working stability of the turbocharger.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a perforated bolt, a supercharger oil inlet pipe and a turbocharger structure.
Background
Automobile engines are mainly classified into naturally aspirated engines and turbocharged engines according to the operation mode of an intake system. Compared with a naturally aspirated engine, the volume of the turbocharged engine can be smaller under the same working condition, so that the engine is miniaturized, the friction work is reduced, and the fuel economy of the engine is improved. With the national requirements on energy conservation and environmental protection being higher and higher, the turbocharged engine is widely adopted, and in the structure of the turbocharged engine, the turbocharger is an important ring. In actual operation, the turbocharger needs to maintain high structural reliability in a severe working environment. For the operating stability of guarantee turbo charger, good fluid lubrication is indispensable, and traditional art adopts mostly to take lubricating oil from the cylinder body main oil gallery of engine, and leading-in advances oil pipe to the booster, advances oil pipe via the booster and supplies with turbo charger. However, impurities in the oil inlet pipe of the turbocharger are easily brought into the turbocharger, and the operating stability of the turbocharger is affected.
Disclosure of Invention
The invention discloses a perforated bolt, and aims to solve the problem that in the prior art, impurities in an oil inlet pipe of a turbocharger are easily brought into the turbocharger to influence the working stability of the turbocharger.
To achieve the above object, the present invention provides a perforated bolt comprising:
the bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet; and the number of the first and second groups,
and the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity.
Optionally, two oil inlets are provided, and the two oil inlets are respectively provided at two opposite sides of the bolt main body in the radial direction;
the filtering device comprises a filtering cylinder which is detachably arranged in the oil filtering cavity, and at least part of the filtering cylinder is respectively covered on the two oil inlets.
Optionally, the filtering device further comprises a connecting seat arranged in the oil filtering cavity, the connecting seat is used for installing the filter cartridge, the connecting seat is provided with an oil passing channel communicated with the inner cavity of the filter cartridge, and one end, far away from the filter cartridge, of the oil passing channel forms an oil passing port.
Optionally, a convex block is arranged on the outer side wall of the connecting seat, a groove is arranged on the inner wall of the oil filtering cavity corresponding to the convex block, and the convex block is clamped in the groove.
Optionally, the perforated bolt further comprises a mounting bracket, the mounting bracket is arranged on the connecting seat, and the mounting bracket is arranged around the periphery of the filter cartridge to support the filter cartridge.
Optionally, the part of the mounting bracket corresponding to the filter cartridge and used for covering the oil inlet is hollowed out.
Optionally, the mounting bracket comprises a bracket body and a collar;
the support main body extends along the oil passing direction of the oil passing channel, and the sleeve ring is formed at least at one end of the support main body and is sleeved at the end part of the filter cylinder.
Optionally, the perforated bolt further comprises a sealing ring, and the sealing ring is located between the inner wall of the oil filtering cavity and the outer wall of the connecting seat.
The invention also provides a supercharger oil inlet pipe, which comprises a perforated bolt, wherein the perforated bolt comprises:
the bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet; and the number of the first and second groups,
and the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity.
The invention also provides a turbocharger structure, which comprises a turbocharger and a supercharger oil inlet pipe, wherein the supercharger oil inlet pipe comprises a perforated bolt, and the perforated bolt comprises:
the bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet; and the number of the first and second groups,
and the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity.
In the technical scheme provided by the invention, the turbocharger structure comprises a turbocharger and a supercharger oil inlet pipe. The oil inlet pipe of the supercharger comprises a perforated bolt, the perforated bolt is arranged at the end part of the oil inlet pipe body of the supercharger, and the perforated bolt comprises a bolt main body and a filtering device. The bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet, the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity. Aiming at the problem that impurities in an oil inlet pipe of a turbocharger in the prior art are easily brought into the turbocharger, the filtering device can filter and clean lubricating oil and screen out a part of impurities, so that the lubricating oil entering the turbocharger contains fewer impurities, and the normal work of the turbocharger is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a perforated bolt according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the bolt body of the perforated bolt of FIG. 1;
FIG. 3 is a schematic perspective view of the perforated bolted filter of FIG. 1 at an angle;
fig. 4 is a schematic perspective view of the perforated bolt filter assembly of fig. 1 at another angle.
Description of the reference numerals
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Automobile engines are mainly classified into naturally aspirated engines and turbocharged engines according to the operation mode of an intake system. Compared with a naturally aspirated engine, the volume of the turbocharged engine can be smaller under the same working condition, so that the engine is miniaturized, the friction work is reduced, and the fuel economy of the engine is improved. With the national requirements on energy conservation and environmental protection being higher and higher, the turbocharged engine is widely adopted, and in the structure of the turbocharged engine, the turbocharger is an important ring. In actual operation, the turbocharger needs to maintain high structural reliability in a severe working environment.
For the operating stability of guarantee turbo charger, good fluid lubrication is indispensable, and traditional art adopts mostly to take lubricating oil from the cylinder body main oil gallery of engine, and leading-in advances oil pipe to the booster, advances oil pipe via the booster and supplies with turbo charger. However, impurities in the oil inlet pipe of the turbocharger are easily brought into the turbocharger, and the operating stability of the turbocharger is affected.
In view of this, the present invention provides a turbocharger structure comprising a turbocharger and a supercharger oil inlet pipe comprising a perforated bolt 1000. In the drawings of the present specification, fig. 1 is a schematic diagram of a cross-sectional structure of a through bolt 1000 according to an embodiment of the present invention; fig. 2 is a schematic perspective view of the bolt body 100 of the perforated bolt 1000 shown in fig. 1; FIG. 3 is a schematic, angled perspective view of the filter assembly 200 of the perforated bolt 1000 of FIG. 1; fig. 4 is a schematic perspective view of the filter device 200 of the perforated bolt 1000 of fig. 1 at another angle.
Specifically, referring to fig. 1 and 2, a perforated bolt 1000 is used on an oil inlet pipe of a supercharger, and the perforated bolt 1000 includes a bolt body 100 and a filter device 200; the bolt main body 100 is provided with an oil inlet 110, an oil outlet 120 and an oil filtering cavity 130 communicated with the oil inlet 110 and the oil outlet 120, so that lubricating oil led out from the cylinder of the engine enters the oil filtering cavity 130 through the oil inlet 110 and is led into the turbocharger from the oil outlet 120, the filtering device 200 is arranged in the oil filtering cavity 130, and the filtering device 200 is used for filtering the lubricating oil passing through the oil filtering cavity 130.
In the technical scheme provided by the invention, the turbocharger structure comprises a turbocharger and a supercharger oil inlet pipe. Wherein, the oil inlet pipe of the supercharger comprises a perforated bolt 1000, the perforated bolt 1000 is arranged at the end part of the oil inlet pipe of the supercharger, and the perforated bolt 1000 comprises a bolt main body 100 and a filtering device 200. The bolt main body 100 is provided with an oil inlet 110, an oil outlet 120 and an oil filtering cavity 130 communicated with the oil inlet 110 and the oil outlet 120, so that lubricating oil led out from the cylinder of the engine enters the oil filtering cavity 130 through the oil inlet 110 and is led into the turbocharger from the oil outlet 120, the filtering device 200 is arranged in the oil filtering cavity 130, and the filtering device 200 is used for filtering the lubricating oil passing through the oil filtering cavity 130. Aiming at the problem that impurities in an oil inlet pipe of a turbocharger in the prior art are easily brought into the turbocharger, the filtering device 200 can filter and clean lubricating oil and screen out a part of impurities, so that the lubricating oil entering the turbocharger contains fewer impurities, and the normal work of the turbocharger is ensured.
In order to increase the filtering speed of the lubricating oil, in the technical solution of the present invention, two oil inlets 110 are provided, the two oil inlets 110 are respectively provided at two opposite sides of the bolt body 100 in the radial direction, the filtering device 200 includes a filter cartridge 210 detachably installed in the oil filtering chamber 130, and at least part of the filter cartridge 210 is respectively disposed to cover the two oil inlets 110. The filter cartridge 210 is disposed corresponding to the two oil inlets 110, so that the filtering operation of the lubricating oil is smoothly performed.
Further, in order to allow the filter device 200 to be smoothly installed in the oil filtering chamber 130, smooth oil filtering operation is ensured. In the technical solution provided by the present invention, referring to fig. 3 and 4, the filtering apparatus 200 further includes a connecting seat 220 disposed in the filtering oil chamber 130, the connecting seat 220 is used for installing the filtering cartridge 210, the connecting seat 220 is provided with an oil passage communicated with the inner cavity of the filtering cartridge 210, and one end of the oil passage far from the filtering cartridge 210 forms an oil passage 221.
In order to further improve the installation effect of the filtering device 200 and ensure that the filtering device 200 is firmly and reliably installed, the outer side wall of the connecting seat 220 is provided with a convex block 222, the inner wall of the oil filtering cavity 130 is provided with a groove 131 corresponding to the convex block 222, and the convex block 222 is clamped in the groove 131.
It should be noted that the filter cartridge 210 has a relatively flexible structure and is susceptible to external forces during operation, which may cause adverse deformation affecting the function of the structure. To effectively avoid this problem, the perforated bolt 1000 further includes a mounting bracket 300, the mounting bracket 300 is disposed on the connecting seat 220, and the mounting bracket 300 is disposed around the outer circumference of the filter cartridge 210 to support the filter cartridge 210. The mounting bracket 300 can stably support the outer circumference of the filter cartridge 210, prevent the filter cartridge 210 from being deformed, and ensure the normal implementation of the filtering function.
Further, the outer circumference of the filter cartridge 210 is disposed corresponding to the oil inlet 110, so that the lubricating oil enters the filter cartridge 210 through the oil inlet 110 and is filtered. In order to prevent the mounting bracket 300 from blocking the oil path of the lubricating oil, the mounting bracket 300 is hollowed out at a position corresponding to the filter cartridge 210 and covering the oil inlet 110.
Specifically, referring to fig. 3 and 4, the mounting bracket 300 includes a bracket main body 310 and a socket ring 320, the bracket main body 310 is disposed to extend in an oil passing direction of the oil passing channel, and the socket ring 320 is formed at least one end of the bracket main body 310 to be socket-connected to an end of the filter cartridge 210. Thus, the socket ring 320 and the bracket body 310 are connected together to form a stressed frame, and the filter cartridge 210 can resist large external force impact without being damaged under the maintenance of the stressed frame, thereby ensuring the smooth realization of structural functions.
Further, in order to prevent the lubricating oil which is not processed by the filter device 200 from flowing into the turbocharger along the gap between the inner wall of the oil filtering chamber 130 and the outer wall of the connecting seat 220, the normal function of the turbocharger is affected. For this purpose, the perforated bolt 1000 further includes a sealing ring 400, and the sealing ring 400 is located between the inner wall of the oil filtering chamber 130 and the outer wall of the connecting seat 220 to perform a sealing function, so as to prevent leaked lubricating oil from directly entering the turbocharger.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a perforated bolt for booster oil inlet pipe, its characterized in that includes:
the bolt main body is provided with an oil inlet, an oil outlet and an oil filtering cavity communicated with the oil inlet and the oil outlet, so that lubricating oil led out from the cylinder body of the engine enters the oil filtering cavity through the oil inlet and is led into the turbocharger from the oil outlet; and the number of the first and second groups,
and the filtering device is arranged in the oil filtering cavity and is used for filtering the lubricating oil passing through the oil filtering cavity.
2. The pierce bolt according to claim 1, wherein there are two oil inlets, the two oil inlets being respectively provided at diametrically opposite sides of the bolt body;
the filtering device comprises a filtering cylinder which is detachably arranged in the oil filtering cavity, and at least part of the filtering cylinder is respectively covered on the two oil inlets.
3. The perforated bolt according to claim 2, wherein the filtering device further comprises a connecting seat disposed in the oil filtering chamber, the connecting seat is used for mounting the filter cartridge, the connecting seat is provided with an oil passage communicating with the inner chamber of the filter cartridge, and one end of the oil passage away from the filter cartridge forms an oil passing port.
4. The perforated bolt of claim 3, wherein the outer side wall of the connecting seat is provided with a projection, the inner wall of the oil filter cavity is provided with a groove corresponding to the projection, and the projection is clamped in the groove.
5. The perforated bolt of claim 3 further comprising a mounting bracket disposed on the connector base, the mounting bracket being disposed around the outer periphery of the filter cartridge to support the filter cartridge.
6. The perforated bolt of claim 5, wherein the mounting bracket is hollowed out corresponding to the filter cartridge for covering the oil inlet.
7. The pierce bolt according to claim 5, wherein said mounting bracket includes a bracket body and a collar;
the support main body extends along the oil passing direction of the oil passing channel, and the sleeve ring is formed at least at one end of the support main body and is sleeved at the end part of the filter cylinder.
8. The perforated bolt of claim 3, further comprising a sealing ring positioned between an inner wall of the oil filter chamber and an outer wall of the connecting seat.
9. A supercharger inlet pipe, comprising the perforated bolt according to any one of claims 1 to 8.
10. A turbocharger structure, characterized by comprising: a turbocharger and a supercharger inlet as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214847.1A CN112324558B (en) | 2020-11-03 | 2020-11-03 | Perforated bolt, supercharger oil inlet pipe and turbocharger structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214847.1A CN112324558B (en) | 2020-11-03 | 2020-11-03 | Perforated bolt, supercharger oil inlet pipe and turbocharger structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324558A true CN112324558A (en) | 2021-02-05 |
| CN112324558B CN112324558B (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011214847.1A Active CN112324558B (en) | 2020-11-03 | 2020-11-03 | Perforated bolt, supercharger oil inlet pipe and turbocharger structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324558B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060193734A1 (en) * | 2004-11-18 | 2006-08-31 | Martin Steve P | Integrated Turbocharger Lubricant Filter System |
| CN201284668Y (en) * | 2008-10-30 | 2009-08-05 | 杨爱国 | Engine oil filtration system of turbosupercharger |
| CN201620950U (en) * | 2009-11-30 | 2010-11-03 | 杨爱国 | Engine oil filtering device for turbocharger |
| CN202970810U (en) * | 2012-10-31 | 2013-06-05 | 浙江吉利汽车研究院有限公司杭州分公司 | Lubrication device in exhaust gas turbocharger for automobile |
| CN206831126U (en) * | 2017-05-08 | 2018-01-02 | 奇瑞汽车股份有限公司 | A kind of sucker of supercharger hollow bolt with filter screen |
-
2020
- 2020-11-03 CN CN202011214847.1A patent/CN112324558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060193734A1 (en) * | 2004-11-18 | 2006-08-31 | Martin Steve P | Integrated Turbocharger Lubricant Filter System |
| CN201284668Y (en) * | 2008-10-30 | 2009-08-05 | 杨爱国 | Engine oil filtration system of turbosupercharger |
| CN201620950U (en) * | 2009-11-30 | 2010-11-03 | 杨爱国 | Engine oil filtering device for turbocharger |
| CN202970810U (en) * | 2012-10-31 | 2013-06-05 | 浙江吉利汽车研究院有限公司杭州分公司 | Lubrication device in exhaust gas turbocharger for automobile |
| CN206831126U (en) * | 2017-05-08 | 2018-01-02 | 奇瑞汽车股份有限公司 | A kind of sucker of supercharger hollow bolt with filter screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112324558B (en) | 2022-01-28 |
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