CN1715377A - Airplane wheel grease and its preparing method - Google Patents
Airplane wheel grease and its preparing method Download PDFInfo
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- CN1715377A CN1715377A CN 200410048359 CN200410048359A CN1715377A CN 1715377 A CN1715377 A CN 1715377A CN 200410048359 CN200410048359 CN 200410048359 CN 200410048359 A CN200410048359 A CN 200410048359A CN 1715377 A CN1715377 A CN 1715377A
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- oil
- acid
- lubricating grease
- additive
- base oil
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Abstract
The airplane wheel grease consists of ethyl silicone oil as base oil 5-45 wt%, composite lithium and calcium soap thickener 3-25 wt%, graphite powder additive 2-20 wt%, phosphate ester additive 0.1-5.0 wt%, aromatic amine antioxidant additive 0.01-3.0 wt%, benzotriazole aliphatic amine as antirust additive 0.01-3.0 wt% and polyalpha olefin oil as base oil in the rest amount. Owing to adopting both ethyl silicone oil and polyalpha olefin oil as base oil, the grease has wide use temperature range as well as excellent mechanical stability, colloid stability, extreme pressure performance, oxidation stability, and antirust performance, and may meet the wide temperature range requirement of lubricating airplane wheels.
Description
Technical field
The present invention relates to a kind of lubricant, a kind of lubricating grease that is used for airplane wheel of saying so more specifically.
Technical background
In order to satisfy the requirement of aircraft long-term safety flight, wheel lubricating grease to have favorable mechanical stability, colloid stability, oxidation stability, rust-preventing characteristic and with the consistency of rubber seal.Simultaneously, aircraft is in the utmost point low temperature environment in the high-altitude, and aircraft is when landing, and wheel stands extreme pressure and high temperature again, and therefore, wheel lubricating grease also will have good extreme pressure property and high and low temperature.
As meet the С А П Ф И Р lubricating grease of TY 38.1011051-87 standard, adopt compound calcium multiviscosisty synthesizing ester oil, and be added with Graphite Powder 99 and phosphoric acid ester, С А П Ф И Р lubricating grease has good high-temperature, 150 ℃ of high temperature, 5h vaporization losses is about 2%, good colloid stability and extreme pressure property, but this fat mechanical stability is poor, cutting off actual measurement cone penetration difference for 100,000 times is 78 units, poor with the consistency of rubber seal, volumetric expansion about 30%, low temperature-40 ℃ similar viscosity is about 1400Pa.s.
US 4,298, the consisting of of 481 disclosed lubricating grease: (a) base oil is a synthesizing ester oil; (b) viscosifying agent is an organobentonite; (c) oxidation inhibitor is phenyl-a-naphthylamine; (d) rust-preventive agent is sorbitol monooleate; (e) extreme pressure agent is a poly-phosphate; (f) metal passivator is a salicylic aldehyde aminoguanidine monoleate.This fat has good high-temperature, 150 ℃ of high temperature, and 5h vaporization losses is about 2%, mechanical stability and colloid stability preferably, cutting off difference 100,000 times among the embodiment is 40 units, the Stencil oil-dividing amount is 2.5%.But this fat and rubber seal consistency are poor, and low temperature-40 ℃ similar viscosity is about 1400Pa.s.
US 4,406, and 800 disclosed grease compositions are poly-a-olefin oil for (a) base oil; (b) viscosifying agent is an organobentonite; (c) molybdenumdisulphide; (d) dialkyldithiocarbamacompositions antimony.This fat have good extreme pressure property and with the consistency of rubber seal, but this fat colloid stability is poor, the Stencil oil-dividing amount is about 7.0% among the embodiment, 150 ℃ of high temperature, 5h vaporization losses is about 3%, low temperature-40 ℃ similar viscosity is about 1400Pa.s.
The disclosed grease composition of CN1431284 is a poly-a-olefin oil for (a) base oil; (b) viscosifying agent is complex lithium, calcium soap; (c) Graphite Powder 99; (d) phosphoric acid ester; (e) oxidation inhibitor and rust-preventive agent.This fat have favorable mechanical stability, colloid stability, extreme pressure property, oxidation stability, rust-preventing characteristic and with the consistency of rubber seal, but the high and low temperature of this fat is relatively poor, 150 ℃ of high temperature, 5 hours vaporization losses is greater than 3%, and the similar viscosity of low temperature-40 ℃ is about 1800Pa.s.
Summary of the invention
The invention provides a kind of lubricating grease for wheels of airplanes that can wide temperature range uses, this fat have good high and low temperature, mechanical stability, colloid stability, extreme pressure property, oxidation stability, rust-preventing characteristic and with the consistency of rubber seal.
The present invention also provides above-mentioned preparation of greases method.
Airplane wheel lubricating grease provided by the invention is benchmark with the lubricating grease gross weight, comprises following composition: (a) 5～45% ethyl silicon oil basis oil; (b) 3～25% complex lithium, calcium soap viscosifying agent; (c) 2～20% Graphite Powder 99 additive; (d) 0.1～5.0% phosphate ester additive; (e) 0.01～3.0% arylamine class antioxidant additive; (f) 0.01～3.0% 124 Triazole fatty acid amine salt rust-inhibiting additive; (g) the poly-a-olefin oil base oil of surplus.
100 ℃ of kinematic viscosity of said ethyl silicon oil basis oil are 10～40mm
2/ s, preferred 20～35mm
2/ s, weight content are 5～45%, preferred 10～35%.
100 ℃ of kinematic viscosity of said poly-a-olefin oil base oil are 3～30mm
2/ s, preferred 10～25mm
2/ s.
Said complex lithium, calcium soap viscosifying agent weight content are 3～25%, preferred 7～20%.
Said Graphite Powder 99 additive has withstand load, wear resistance and thermotolerance, and mean particle size is 0.25～10um, and weight content is 2～20%, and preferred 5～15%.
Said phosphate ester additive can be tritolyl phosphate, di-n-butyl phosphite, triphenylphosphate and triethyl phosphate, tritolyl phosphate preferably, and it has extreme pressure, antirust and thermotolerance, and weight content is 0.1～5.0%, preferred 0.5～3.0%.
Said arylamine class antioxidant additive can be pentanoic, di-iso-octyldiphenylamine, phenyl-a-naphthylamine, di-iso-octyldiphenylamine preferably, and content is 0.01～3.0%, preferred 0.05～1.0%.
Said 124 Triazole fatty acid amine salt rust-inhibiting additive can be benzotriazole, 124 Triazole stearylamine, benzotriazole preferably, and content is 0.01～3.0%, preferred 0.05～1.0%.
More than various raw materials be the commercial goods.
Preparation of greases method provided by the invention comprises: being selected from C
12～C
24Lipid acid or at least a monoprotic acid in the hydroxy fatty acid, water and part base oil mix, and heating for dissolving adds calcium hydroxide, lithium hydroxide and is selected from terephthalic acid and C
2～C
12At least a diprotic acid in the binary lipid acid, encloses container is at 100～170 ℃, 0.1 carried out saponification reaction under the～0.6MPa 0.5～5.0 hour, the dehydration that heats up after the release adds the residue base oil, the circulation cooling adds above-mentioned various additive, and homogenizing, the degassing get final product.
Specifically, preparation of greases method provided by the invention can be carried out in the following manner: monoprotic acid, water and part base oil are mixed, and be heated to 70～85 ℃ and make monoprotic acid dissolving, add calcium hydroxide, lithium hydroxide and diprotic acid, wherein the three can add simultaneously, also can add calcium hydroxide earlier, makes part monoprotic acid at first generate calcium soap with calcium hydroxide reaction, reacted about 5～20 minutes, and added diprotic acid and lithium hydroxide again.Encloses container then, be warming up to 100～170 ℃, preferred 110～160 ℃, keep reaction pressure 0.1～0.6MPa, preferred 0.1～0.5MPa, reaction times is 0.5～5.0 hour, preferred 0.6～3.0 hour, release continued to be warming up to 205～215 ℃, add residue base oil circulation cooling, obtain basic fat.In basic fat, add additive, carry out the homogenizing processing and the degassing at last, obtain even, bright lubricating grease.
Wherein the mol ratio of monoprotic acid and diprotic acid is 1: 0.1～0.8, preferred 1: 0.25～0.5.Bronsted lowry acids and bases bronsted lowry equivalent reaction, the add-on of calcium hydroxide is 5～50% of a monoprotic acid mole number, and is preferred 5～30%, surplus is a lithium hydroxide.The lithium calcium soap that acid-base reaction generates is 3～25% of a lubricating grease gross weight, preferred 7～20%.The consumption of water can be 3～5 times of alkali gross weight.Base oil adds at twice, can add 1/2～3/4 of base oil gross weight earlier in reaction mixture, adds the residue base oil after the reaction again to cool off.Poly-a-olefin oil is because viscosity is less, best all or part of joining in the reaction mixture, and with the mixing oil of whole ethyl silicon oils or ethyl silicon oil and part poly-a-olefin oil as cooling oil.
Said monoprotic acid is to be selected from C
12～C
24, preferred C
16～C
20At least a acid in lipid acid or the hydroxy fatty acid, more preferably 12-oxystearic acid or stearic acid.Said diprotic acid is to be selected from terephthalic acid and C
2～C
12, preferred C
4～C
12At least a acid in the binary lipid acid, more preferably terephthalic acid, hexanodioic acid, nonane diacid or sebacic acid.
Lubricating grease provided by the invention is because employing poly-a-olefin oil and ethyl silicon oil are base oil, produced unforeseeable technique effect than the lubricating grease that uses poly-a-olefin oil as the base oil preparation separately, particularly has wideer use temperature scope, lubricating grease of the present invention in addition also has favorable mechanical stability, colloid stability, extreme pressure property, oxidation stability, rust-preventing characteristic, can satisfy the lubricated of wide temperature range airplane wheel bearing.Grease dropping point of the present invention is greater than 280 ℃, cuts off difference about 20 units 100,000 times, rubber volumetric expansion about 4%, and 150 ℃ of high temperature, 5h vaporization losses is 2%, and low temperature-40 ℃ similar viscosity is 900Pa.s, and-50 ℃ of similar viscosities are about 1400Pa.s.
Embodiment
The weight that does not comprise water and alkali during the lubricating grease gross weight of calculated examples 1-3.
Example 1
In the 20L autoclave pressure, add 5200 gram poly-a-olefin oils and 840 grams, ten dihydroxystearic acids, 800ml water, heating, temperature rises to 75 ℃, adds 11.4 gram calcium hydroxides, react after 10 minutes, add 280 gram sebacic acid and 230 gram lithium hydroxides, sealing, being heated to pressure is 0.3MPa, constant voltage 1 hour, release, be warming up to 210 ℃, add quenching oil, quenching oil is 310 gram poly-a-olefin oils and 2000 gram ethyl silicon oils, circulation is cooled to 150 ℃, with 0.6MPa press-cutting 30 minutes, obtains basic fat.The Graphite Powder 99 that in basic fat, adds 1000 grams, the tritolyl phosphate of 300 grams, the di-iso-octyldiphenylamine of 50 grams, the benzotriazole of 20 grams stirs, packing.The product physicochemical property sees Table 1.
Example 2
In the 20L autoclave pressure, add 4641 gram poly-a-olefin oils and 1383 grams, ten dihydroxystearic acids, 1000ml water, heating, temperature rises to 75 ℃, adds 37.5 gram calcium hydroxides, react after 10 minutes, add 461 gram sebacic acid and 355 gram lithium hydroxides, sealing, being heated to pressure is 0.3MPa, constant voltage 1 hour, release is warming up to 210 ℃, adds quenching oil, quenching oil is 900 gram poly-a-olefin oils and 1000 gram ethyl silicon oils, circulation is cooled to 150 ℃, with 0.6MPa press-cutting 30 minutes, obtains basic fat.The Graphite Powder 99 that in basic fat, adds 1500 grams, the di-n-butyl phosphite of 100 grams, the pentanoic of 10 grams, the benzotriazole of 5 grams stirs, packing.The product physicochemical property sees Table 1.
Example 3
According to the composition and the technology of example 1, quenching oil is 2310 gram ethyl silicon oils, and the product physicochemical property sees Table 1.
Comparative example 1
Form and prepared lubricating grease according to CN 02100232, do not contain ethyl silicon oil in the base oil.The product physicochemical property sees Table 1.
Table 1 physicochemical property
| Analysis project | Example 1 | Example 2 | Example 3 | Comparative example 1 | Test method |
| Cone penetration, 0.1mm | 288 | 277 | 294 | 278 | GB/T269 |
| Dropping point, ℃ | ＞280 | ＞280 | ＞280 | ＞280 | GB/T3498 |
| Similar viscosity-40 ℃, Pa.s-50 ℃, Pa.s | 843 1468 | 968 1622 | 786 1367 | 1841 —— | SH/T0048 |
| Steam output (150 ℃, 5h), % | 1.91 | 2.36 | 1.77 | 3.45 | SH/T0337 |
| Prolong Drawing cone in-degree (100,000 times, difference), 0.1mm | 23 | 20 | 29 | 18 | GB/T269 |
| Pressure divides oil (1000g), % | 6.7 | 5.3 | 9.8 | 7.2 | GB/T392 |
| Extreme pressure property (four ball methods, PB), Kg | 90 | 90 | 90 | 90 | SH/T0202 |
| Rubber compatibility (NBR-L type film, 70 ℃, 168h), V/V% | 4.35 | 5.33 | 4.78 | 4.52 | FS791B 3603.4 |
| Corrosion (100 ℃, 24h, T 2Copper sheet) | Qualified | Qualified | Qualified | Qualified | GB/T7325 |
| Rust-preventing characteristic (52 ℃, 48h), level | 1 | 1 | 1 | 1 | GB/T5018 |
| Oxidation stability (100 ℃, 100h, pressure falls), KPa | 10 | 11 | 7 | 15 | SH/T0325 |
Find out by last table analysis result, lubricating grease provided by the invention have outstanding high and low temperature, favorable mechanical stability, colloid stability, extreme pressure property and with the consistency of rubber seal, be applicable to the lubricated of wide temperature range airplane wheel bearing.
Claims (12)
1. a lubricating grease for wheels of airplanes is a benchmark with the lubricating grease gross weight, comprises following composition: (a) 5～45% ethyl silicon oil basis oil; (b) 3～25% complex lithium, calcium soap viscosifying agent; (c) 2～20% Graphite Powder 99 additive; (d) 0.1～5.0% phosphate ester additive; (e) 0.01～3.0% arylamine class antioxidant additive; (f) 0.01～3.0% 124 Triazole fatty acid amine salt rust-inhibiting additive; (g) the poly-a-olefin oil base oil of surplus.
2. according to the described lubricating grease of claim 1, it is characterized in that 100 ℃ of kinematic viscosity of said ethyl silicon oil basis oil are 10～40mm
2/ s, 100 ℃ of kinematic viscosity of said poly-a-olefin oil base oil are 3～30mm
2/ s.
3. according to the described lubricating grease of claim 1, it is characterized in that the weight content of said ethyl silicon oil basis oil is 10～35%.
4. according to the described lubricating grease of claim 1, it is characterized in that said complex lithium, calcium soap viscosifying agent weight content are 7～20%.
5. according to the described lubricating grease of claim 1, it is characterized in that said Graphite Powder 99 weight of additive content is 5～15%.
6. according to the described lubricating grease of claim 1, it is characterized in that said phosphate ester additive is selected from tritolyl phosphate, di-n-butyl phosphite, triphenylphosphate and triethyl phosphate, weight content is 0.5～3.0%.
7. according to the described lubricating grease of claim 1, it is characterized in that said arylamine class antioxidant additive is pentanoic, di-iso-octyldiphenylamine or phenyl-a-naphthylamine, weight content is 0.05～1.0%.
8. according to the described lubricating grease of claim 1, it is characterized in that said 124 Triazole fatty acid amine salt rust-inhibiting additive is benzotriazole or 124 Triazole stearylamine, weight content is 0.05～1.0%.
9. the described preparation of greases method of claim 1 comprises: being selected from C
12～C
24Lipid acid or at least a monoprotic acid in the hydroxy fatty acid, water and part base oil mix, heating for dissolving adds calcium hydroxide, lithium hydroxide and is selected from terephthalic acid and C
2～C
12At least a diprotic acid in the binary lipid acid, encloses container is at 100～170 ℃, 0.1 carried out saponification reaction under the～0.6MPa 0.5～5.0 hour, the dehydration that heats up after the release adds the residue base oil, the circulation cooling adds the described additive of claim 1, and homogenizing, the degassing get final product.
10. according to the described lubricating grease of claim 1, it is characterized in that the mol ratio of monoprotic acid and diprotic acid is 1: 0.1～0.8, base oil adds at twice, in reaction mixture, add 1/2～3/4 of base oil gross weight earlier, add the residue base oil after the reaction again and cool off.
11., it is characterized in that poly-a-olefin oil is all or part of to join in the reaction mixture according to the described lubricating grease of claim 1, the mixing oil of ethyl silicon oil or ethyl silicon oil and part poly-a-olefin oil is as reacted cooling oil.
12., it is characterized in that said monoprotic acid is 12-oxystearic acid or stearic acid according to the described lubricating grease of claim 1, said diprotic acid is terephthalic acid, hexanodioic acid, nonane diacid or sebacic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100483592A CN1333053C (en) | 2004-06-29 | 2004-06-29 | Airplane wheel grease and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100483592A CN1333053C (en) | 2004-06-29 | 2004-06-29 | Airplane wheel grease and its preparing method |
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|---|---|
| CN1715377A true CN1715377A (en) | 2006-01-04 |
| CN1333053C CN1333053C (en) | 2007-08-22 |
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|---|---|---|---|
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140382A (en) * | 2011-01-28 | 2011-08-03 | 华南理工大学 | Hub bearing lubricating grease and preparation method thereof |
| CN103275798A (en) * | 2013-06-19 | 2013-09-04 | 上海禾泰特种润滑技术有限公司 | Lubricating grease composition for heavy-loading roller press bearing and preparation method thereof |
| CN105199817A (en) * | 2015-10-23 | 2015-12-30 | 中国石油化工股份有限公司 | Low-temperature lithium-calcium bearing lubricating grease and preparation method |
| CN105542926A (en) * | 2015-12-24 | 2016-05-04 | 东莞市安美润滑科技有限公司 | Car braking system sealing grease |
| CN106497661A (en) * | 2016-10-05 | 2017-03-15 | 中国石油化工股份有限公司 | Blower fan main shaft grease component and preparation method |
| CN112111313A (en) * | 2020-09-28 | 2020-12-22 | 上海虎头化工有限公司 | Ultralow-temperature lubricating grease and preparation method thereof |
| CN112912479A (en) * | 2018-07-18 | 2021-06-04 | Ddp特种电子材料美国第9有限公司 | Grease composition based on silicone base stock |
| CN115960658A (en) * | 2022-12-30 | 2023-04-14 | 无锡飞天润滑油科技股份有限公司 | Lubricating grease for section cutting machine and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3829467A1 (en) * | 1988-08-31 | 1990-04-26 | Bayer Ag | POLYORGANOSILOXANE BASED LUBRICANTS |
| CN1171983C (en) * | 2002-01-10 | 2004-10-20 | 中国石油化工股份有限公司 | Lubricating grease for wheels of airplanes and its preparing method |
| CN1216973C (en) * | 2002-07-30 | 2005-08-31 | 中国石油化工股份有限公司 | Universal antirusting grease for air plane and preparing method thereof |
-
2004
- 2004-06-29 CN CNB2004100483592A patent/CN1333053C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140382A (en) * | 2011-01-28 | 2011-08-03 | 华南理工大学 | Hub bearing lubricating grease and preparation method thereof |
| CN103275798A (en) * | 2013-06-19 | 2013-09-04 | 上海禾泰特种润滑技术有限公司 | Lubricating grease composition for heavy-loading roller press bearing and preparation method thereof |
| CN103275798B (en) * | 2013-06-19 | 2014-12-10 | 上海禾泰特种润滑科技股份有限公司 | Lubricating grease composition for heavy-loading roller press bearing and preparation method thereof |
| CN105199817A (en) * | 2015-10-23 | 2015-12-30 | 中国石油化工股份有限公司 | Low-temperature lithium-calcium bearing lubricating grease and preparation method |
| CN105542926A (en) * | 2015-12-24 | 2016-05-04 | 东莞市安美润滑科技有限公司 | Car braking system sealing grease |
| CN106497661A (en) * | 2016-10-05 | 2017-03-15 | 中国石油化工股份有限公司 | Blower fan main shaft grease component and preparation method |
| CN112912479A (en) * | 2018-07-18 | 2021-06-04 | Ddp特种电子材料美国第9有限公司 | Grease composition based on silicone base stock |
| CN112111313A (en) * | 2020-09-28 | 2020-12-22 | 上海虎头化工有限公司 | Ultralow-temperature lubricating grease and preparation method thereof |
| CN112111313B (en) * | 2020-09-28 | 2022-05-13 | 上海虎头化工有限公司 | Ultralow-temperature lubricating grease and preparation method thereof |
| CN115960658A (en) * | 2022-12-30 | 2023-04-14 | 无锡飞天润滑油科技股份有限公司 | Lubricating grease for section cutting machine and preparation method thereof |
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