CN104046447B - The hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite - Google Patents
The hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite Download PDFInfo
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- CN104046447B CN104046447B CN201410289236.1A CN201410289236A CN104046447B CN 104046447 B CN104046447 B CN 104046447B CN 201410289236 A CN201410289236 A CN 201410289236A CN 104046447 B CN104046447 B CN 104046447B
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- 239000012530 fluid Substances 0.000 title claims abstract description 17
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- 230000010354 integration Effects 0.000 title claims abstract description 7
- -1 detergency Substances 0.000 claims abstract description 38
- 150000001875 compounds Chemical class 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000003921 oil Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 239000003566 sealing material Substances 0.000 claims abstract description 9
- 239000003345 natural gas Substances 0.000 claims abstract description 7
- 229920000570 polyether Polymers 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 5
- 239000003112 inhibitor Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims abstract description 5
- 230000008961 swelling Effects 0.000 claims abstract description 5
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 4
- 239000000654 additive Substances 0.000 claims abstract description 3
- 230000000996 additive effect Effects 0.000 claims abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 241000158728 Meliaceae Species 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 8
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims description 8
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 5
- VAMBUGIXOVLJEA-UHFFFAOYSA-N 4-(butylamino)phenol Chemical compound CCCCNC1=CC=C(O)C=C1 VAMBUGIXOVLJEA-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 4
- DMBHHRLKUKUOEG-UHFFFAOYSA-N N-phenyl aniline Natural products C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 4
- 229920002367 Polyisobutene Polymers 0.000 claims description 4
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 4
- 239000002199 base oil Substances 0.000 claims description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- VQTUBCCKSQIDNK-UHFFFAOYSA-N iso-butene Natural products CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 4
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 claims description 4
- 150000004291 polyenes Chemical class 0.000 claims description 4
- 229960002317 succinimide Drugs 0.000 claims description 4
- 150000003852 triazoles Chemical class 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 239000000839 emulsion Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000007062 hydrolysis Effects 0.000 abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 239000004593 Epoxy Chemical class 0.000 description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- AICOOMRHRUFYCM-ZRRPKQBOSA-N oxazine, 1 Chemical compound C([C@@H]1[C@H](C(C[C@]2(C)[C@@H]([C@H](C)N(C)C)[C@H](O)C[C@]21C)=O)CC1=CC2)C[C@H]1[C@@]1(C)[C@H]2N=C(C(C)C)OC1 AICOOMRHRUFYCM-ZRRPKQBOSA-N 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Lubricants (AREA)
Abstract
The invention discloses the hydrostatic speed change formed with hydrodynamic drive and turn to integration unit working fluid composite, adopt oil based on natural gas synthetic oil (GTL) and oil soluble polyethers compound, coordinate multiple composite additive, comprising: anti-wear agent, rust-preventive agent, oxidation inhibitor, extreme pressure agent, kilfoam, non-emulsifying agent, metal passivator, sealing material swelling agent, oiliness improver, friction improver, purification agent, dispersion agent etc.The present invention have suitable viscosity, good viscosity-temperature characteristics, shear stability, stick-slip characteristic, oilness, cooling, rust-preventing characteristic, with adaptability, anti-bubble, filterableness, low-temperature fluidity, resistance to emulsion, detergency, air release characteristics, thermal oxidation stability, hydrolysis stability, the extreme pressure anti-wear of sealing material, be conducive to cold-starting, gearshift, speed change are steady, improve transmission efficiency, meet the service requirements under the working conditions such as transmitted power is large, friction square is large.
Description
Technical field
The invention belongs to mechanical-hydraulic and hydrodynamic drive field of lubricant, particularly the hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite.
Background technology
Hydrostaticly turning to compound transmission working fluid composite with the speed change of fluid power with hydrostatic drive and fluid power for agreeing with a form, being usually used in the two power steering gear of hydrostatic machinery of the special vehicles such as the caterpillar engineering machinery of high-power hydrodynamic drive, handling machinery and military vehicle.This Double-side variable speed device and pair power steering gear integrating speed change and turning function, there is more multiple stable turning radius, after being integrated with the hydrostatic wheelwork with stepless change ability, having more can step-less adjustment turning radius and reclaim the braking power of crawler belt at a slow speed, the function of regeneration crawler belt fast.While the average turning velocity improving vehicle, can greatly can also improve the comfortableness of vehicle operating.Equip the vehicle of this device when keeping straight on, the power flow theory of flow of pressurized transmission is zero, only Hydromechanical transmission is to running gear through-put power, while the zero turn radius around car, hydraulic machinery poower flow is zero, and the whole power of a few hand is all transmitted by hydrostatic drives within the of short duration time to turn of several seconds.Vehicle is all between above-mentioned two kinds of extreme case under the most of operating mode travelled, and shares by hydraulic machinery and hydrostatic device the transmission all walking power.Its working oil must have the characteristic of hydraulic efficiency oil fluid power transmission fluid and the large oil product of gear wet goods three simultaneously.Require simultaneously working fluid have good sticky-temperature characteristics, low-temperature fluidity, high shear stability, cooling, rust-preventing characteristic, the adaptability with sealing material, anti-bubble, acid neutralization capacity, resistance to emulsion, greasy filth dispersiveness, air release characteristics, thermal oxidation stability, hydrolysis stability, extreme pressure anti-wear; Be conducive to cold-starting, gearshift, speed change are steady, noise is low, vibrate little, improve transmission efficiency, meet the characteristics such as transmitted power is large, friction square is large.Be applicable to the hydraulic efficiency plant of vane pump in large discharge capacity and high pressure plunger pump.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind ofly has good viscosity-temperature characteristics, low-temperature fluidity, shear stability, oilness, cooling, rust-preventing characteristic, with the adaptability of sealing material, anti-bubble, filterableness, resistance to emulsion, detergency, air release characteristics, thermal oxidation stability, hydrolysis stability, extreme pressure anti-wear, be conducive to cold-starting, gearshift, speed change is steady, improve transmission efficiency, meet transmitted power large, the speed change that the hydrostatic and hydrodynamic drive of the service requirements under working condition such as friction square large grade forms turns to integration unit working fluid composite.
For above-mentioned technical problem, the present invention adopts following technical scheme:
The hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite, and adopt oil based on natural gas synthetic oil and oil soluble polyethers compound, coordinate multiple composite additive, the mass percent of each component is:
| Component | Mass percent content |
| Base oil | Surplus |
| Oxidation inhibitor | 0.5％～1.0％ |
| Anti-wear agent | 1.5％～3.0％ |
| Extreme pressure agent | 1.0％～3.0％ |
| Oiliness improver | 0.5％～1.0％ |
| Friction improver | 0.5％～1.5％ |
| Rust-preventive agent | 0.3％～1.0％ |
| Kilfoam | 0.001％～0.005％ |
| Non-emulsifying agent | 0.3％～0.5％ |
| Metal passivator | 0.5％～1.2％ |
| Sealing material swelling agent | 0.5％～3.0％ |
| Purification agent | 1.0％～3.0％ |
| Dispersion agent | 2.0％～3.0％ |
The mass percent summation of each component is 100%.
Base oil is mass ratio 45% ~ 55% natural gas synthetic oil and 55% ~ 45% oil soluble polyethers compound.
Oxidation inhibitor be the alkyl diphenylamine of mass ratio 35% ~ 45%, the N-normal-butyl p-aminophenol of 35% ~ 45% and 30% ~ 20% molybdenum dithiocarbamate compound; The mass percent summation of three components is 100%.
Anti-wear agent is the tritolyl phosphate of mass ratio 35% ~ 45% and the sulfide isobutene compound of 65% ~ 55%.
Extreme pressure agent is the boronation phosphoric acid ester of mass ratio 45% ~ 55% and the aminothio ester compound of 55% ~ 45%; Oiliness improver is the alkyl phosphite of mass ratio 45% ~ 55% and the butyl stearate compound of 55% ~ 45%.
Friction improver is the 124 Triazole lipid acid amine salt of mass ratio 35% ~ 45% and the sulfurized olefin cotton oil T405 compound of 55% ~ 65%; Rust-preventive agent is mass ratio 45% ~ 55% benzotriazole and 55% ~ 45% dialkyl succinylsuccinate half ester compound.
Kilfoam is the polymethylphenyl siloxane fluid of mass ratio 45% ~ 55% and the acrylate of 55% ~ 45% and ether copolymer compound; Non-emulsifying agent be the propylene oxide of mass ratio 45% ~ 55% and ethylene oxide copolymer and 55% ~ 45% amine and epoxy compounds synthesis compound.
Metal passivator is the 124 Triazole derivative of mass ratio 45% ~ 55% and the N of 55% ~ 45%, N-di-sec-butyl-p-phenyl enediamine compound; Sealing material swelling agent is mass ratio 65% ~ 75% phosphoric acid ester and 35% ~ 25% clorafin 42# compound.
Purification agent is mass ratio 45% ~ 55% low alkali value calcium mahogany sulfonate T101 and 55% ~ 45% high base number calcium mahogany sulfonate T103 compound.
Dispersion agent is mass ratio 45% ~ 55% polyisobutene succinimide T155 and 55% ~ 45% polyene-based succimide T153 compound.
Remarkable advantage of the present invention has: good viscosity-temperature characteristics, low-temperature fluidity, shear stability, stick-slip characteristic, oilness, cooling, rust-preventing characteristic, with adaptability, anti-bubble, filterableness, resistance to emulsion, detergency, air release characteristics, thermal oxidation stability, hydrolysis stability, the extreme pressure anti-wear of sealing material, be conducive to cold-starting, gearshift, speed change are steady, improve transmission efficiency, meet the service requirements under the working conditions such as transmitted power is large, friction square is large.
Embodiment
Embodiment 1:
Each component of following masses percentage ratio is in harmonious proportion and forms:
| Component | Mass percent content |
| Mass ratio 45 natural gas synthetic oil (GTL) and 55% oil soluble polyethers | 84.647％ |
| The alkyl diphenylamine of mass ratio 40%, the N-normal-butyl p-aminophenol of 40% and 20% molybdenum dithiocarbamate compound | 0.7％ |
| The tritolyl phosphate of mass ratio 40% and the sulfide isobutene compound of 60% | 2.2％ |
| The boronation phosphoric acid ester of mass ratio 50% and the aminothio ester compound of 50% | 2.5％ |
| The alkyl phosphite of mass ratio 50% and the butyl stearate compound of 50% | 0.7％ |
| The 124 Triazole lipid acid amine salt of mass ratio 40% and sulfurized olefin cotton oil (T405) compound of 60% | 1％ |
| Mass ratio 50% benzotriazole and 50% dialkyl succinylsuccinate half ester | 0.75％ |
| The polymethylphenyl siloxane fluid of mass ratio 50% and the acrylate of 50% and ether copolymer compound; | 0.003％ |
| The propylene oxide of mass ratio 50% and ethylene oxide copolymer and 50% amine and epoxy compounds synthesis compound | 0.4％ |
| The 124 Triazole derivative of mass ratio 50% and the N of 50%, N-di-sec-butyl-p-phenyl enediamine compound | 0.8％ |
| Mass ratio 70% phosphoric acid ester and 30% clorafin (42#) compound | 1.8％ |
| Mass ratio 50% low alkali value calcium mahogany sulfonate (T101) and 50% high base number calcium mahogany sulfonate (T103) compound | 2.0％ |
| Mass ratio 50% polyisobutene succinimide (T155) and 50% polyene-based succimide (T153) compound | 2.5％ |
Embodiment 2:
Each component of following masses percentage ratio is in harmonious proportion and forms:
| Component | Mass percent content |
| Mass ratio 55% natural gas synthetic oil (GTL) and 45% oil soluble polyethers | 85.199％ |
| The alkyl diphenylamine of mass ratio 35%, the N-normal-butyl p-aminophenol of 35% and 30% molybdenum dithiocarbamate compound | 0.5％ |
| The tritolyl phosphate of mass ratio 35% and the sulfide isobutene compound of 65% | 2.5％ |
| The boronation phosphoric acid ester of mass ratio 45% and the aminothio ester compound of 55% | 3.0％ |
| The alkyl phosphite of mass ratio 45% and the butyl stearate compound of 55% | 0.5％ |
| The 124 Triazole lipid acid amine salt of mass ratio 35% and sulfurized olefin cotton oil (T405) compound of 65% | 0.5％ |
| Mass ratio 45% benzotriazole and 55% dialkyl succinylsuccinate half ester | 0.5％ |
| The polymethylphenyl siloxane fluid of mass ratio 45% and the acrylate of 55% and ether copolymer compound | 0.001％ |
| The propylene oxide of mass ratio 45% and ethylene oxide copolymer and 55% amine and epoxy compounds synthesis compound | 0.3％ |
| The 124 Triazole derivative of mass ratio 45% and the N of 55%, N-di-sec-butyl-p-phenyl enediamine compound; | 0.5％ |
| Mass ratio 65% phosphoric acid ester and 35% clorafin (42#) compound | 2.5％ |
| Mass ratio 45% low alkali value calcium mahogany sulfonate (T101) and 55% high base number calcium mahogany sulfonate (T103) compound | 2.0％ |
| Mass ratio 45% polyisobutene succinimide (T155) and 55% polyene-based succimide (T153) compound | 2.0％ |
Embodiment 3:
Each component of following masses percentage ratio is in harmonious proportion and forms:
The key technical indexes of embodiment 2 product:
| Project | Quality index |
| Moisture, % is not more than | Vestige |
| 40 DEG C of kinematic viscosity mm 2/s | 107.5 |
| Flash-point (opening) DEG C, is greater than | 236 |
| Mechanical impurity, % is not more than | Nothing |
| Last non seizure load (P b), Kg is not less than | 96 |
| Pour point, DEG C, not higher than | -23 |
| Water soluble acid or alkali | Nothing |
| Corrosion test (copper sheet, 100 DEG C, 3h), level | 1 |
| Viscosity index, is not less than | 120 |
| Air release value (50 DEG C), min, is not more than | 6 |
| Rubber seal adaptation index, %, is not more than | 14 |
| Resistance to emulsion (40-37-3ml), min, is not more than by 54 DEG C | 30 |
| Timken tests, and N, is not less than | 270 |
Claims (1)
1. the hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite, it is characterized in that: adopt oil based on natural gas synthetic oil and oil soluble polyethers compound, coordinate multiple composite additive, the mass percent of each component is:
The mass percent summation of each component is 100%;
Base oil is mass ratio 45% ~ 55% natural gas synthetic oil and 55% ~ 45% oil soluble polyethers compound;
Oxidation inhibitor be the alkyl diphenylamine of mass ratio 35% ~ 45%, the N-normal-butyl p-aminophenol of 35% ~ 45% and 30% ~ 20% molybdenum dithiocarbamate compound; The mass percent summation of three components is 100%;
Anti-wear agent is the tritolyl phosphate of mass ratio 35% ~ 45% and the sulfide isobutene compound of 65% ~ 55%;
Extreme pressure agent is the boronation phosphoric acid ester of mass ratio 45% ~ 55% and the aminothio ester compound of 55% ~ 45%;
Oiliness improver is the alkyl phosphite of mass ratio 45% ~ 55% and the butyl stearate compound of 55% ~ 45%;
Friction improver is the 124 Triazole lipid acid amine salt of mass ratio 35% ~ 45% and the sulfurized olefin cotton oil T405 compound of 55% ~ 65%;
Rust-preventive agent is mass ratio 45% ~ 55% benzotriazole and 55% ~ 45% dialkyl succinylsuccinate half ester compound;
Kilfoam is the polymethylphenyl siloxane fluid of mass ratio 45% ~ 55% and the acrylate of 55% ~ 45% and ether copolymer compound;
Metal passivator is the 124 Triazole derivative of mass ratio 45% ~ 55% and the N of 55% ~ 45%, N-di-sec-butyl-p-phenyl enediamine compound;
Sealing material swelling agent is mass ratio 65% ~ 75% phosphoric acid ester and 35% ~ 25% clorafin 42# compound;
Purification agent is mass ratio 45% ~ 55% low alkali value calcium mahogany sulfonate T101 and 55% ~ 45% high base number calcium mahogany sulfonate T103 compound;
Dispersion agent is mass ratio 45% ~ 55% polyisobutene succinimide T155 and 55% ~ 45% polyene-based succimide T153 compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410289236.1A CN104046447B (en) | 2014-06-24 | 2014-06-24 | The hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite |
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|---|---|---|---|
| CN201410289236.1A CN104046447B (en) | 2014-06-24 | 2014-06-24 | The hydrostatic speed change formed with hydrodynamic drive turns to integration unit working fluid composite |
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| CN104046447B true CN104046447B (en) | 2016-02-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105255569A (en) * | 2015-11-23 | 2016-01-20 | 广西大学 | Working liquid composition for hydraulic hybrid power device |
| CN106398840A (en) * | 2016-09-05 | 2017-02-15 | 广西大学 | Lubricant composition for cycloidal-pin gear speed reducer |
| CN106479648A (en) * | 2016-10-17 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of high viscosity synthetic hydraulic fluid compositionss and its application |
| CN110484332B (en) * | 2019-09-16 | 2021-08-31 | 辽宁百特润滑科技有限责任公司 | Hydraulic oil composite additive, preparation method thereof and hydraulic oil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140282A (en) * | 1999-12-15 | 2000-10-31 | Exxonmobil Research And Engineering Company | Long life lubricating oil composition using particular detergent mixture |
| CN101812355A (en) * | 2009-12-18 | 2010-08-25 | 益田润石（北京）化工有限公司 | Novel synthetic fire-resistant hydraulic oil composition |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140282A (en) * | 1999-12-15 | 2000-10-31 | Exxonmobil Research And Engineering Company | Long life lubricating oil composition using particular detergent mixture |
| CN101812355A (en) * | 2009-12-18 | 2010-08-25 | 益田润石（北京）化工有限公司 | Novel synthetic fire-resistant hydraulic oil composition |
Non-Patent Citations (1)
| Title |
|---|
| 汽车发动机绿色润滑油的发展;金志良等;《公路与汽运》;20070331(第2期);20-22 * |
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Inventor after: Huang Fuchuan Inventor after: Qin Ke Inventor after: Chen Wei Inventor after: Huang Yiyao Inventor after: Huang Xiaoping Inventor before: Huang Fuchuan Inventor before: Chen Biao Inventor before: Huang Yiyao Inventor before: Liu Yuheng Inventor before: Mo Yufei Inventor before: Lu Chaoxia Inventor before: Huang Xiaoping Inventor before: Deng Fukang Inventor before: Li Kangchun Inventor before: Huang Yilin Inventor before: Ma Xiaofei |
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