CN114369485A - Environment-friendly shield tail sealing grease and preparation method thereof - Google Patents
Environment-friendly shield tail sealing grease and preparation method thereof Download PDFInfo
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- CN114369485A CN114369485A CN202011101797.6A CN202011101797A CN114369485A CN 114369485 A CN114369485 A CN 114369485A CN 202011101797 A CN202011101797 A CN 202011101797A CN 114369485 A CN114369485 A CN 114369485A
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- 239000004519 grease Substances 0.000 title claims abstract description 100
- 238000007789 sealing Methods 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 86
- 239000007787 solid Substances 0.000 claims abstract description 86
- 230000000996 additive effect Effects 0.000 claims abstract description 78
- 239000002245 particle Substances 0.000 claims abstract description 58
- 230000001050 lubricating effect Effects 0.000 claims abstract description 28
- 239000006247 magnetic powder Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 15
- 241000220259 Raphanus Species 0.000 claims abstract description 9
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 21
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- 241000196324 Embryophyta Species 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 229940080314 sodium bentonite Drugs 0.000 claims description 8
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 8
- 241000157282 Aesculus Species 0.000 claims description 7
- 235000010181 horse chestnut Nutrition 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 claims description 6
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229920002367 Polyisobutene Polymers 0.000 claims description 5
- 229920002396 Polyurea Polymers 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 abstract description 4
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008719 thickening Effects 0.000 abstract description 3
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 abstract description 2
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 abstract description 2
- 235000020661 alpha-linolenic acid Nutrition 0.000 abstract description 2
- 239000002199 base oil Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 abstract description 2
- 229960004488 linolenic acid Drugs 0.000 abstract description 2
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 16
- 238000004898 kneading Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 235000019197 fats Nutrition 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/06—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a compound of the type covered by group C10M109/00
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M121/00—Lubricating compositions characterised by the thickener being a compound of unknown or incompletely defined constitution
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/06—Mixtures of thickeners and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/103—Clays; Mica; Zeolites
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention relates to the technical field of lubricating grease, in particular to environment-friendly shield tail sealing grease and a preparation method thereof. The environment-friendly shield tail sealing grease mainly comprises the following raw materials in parts by weight: 100-150 parts of lubricating grease, 25-45 parts of solid additive, 8-10 parts of tackifier, 4-5 parts of water-absorbing expanding agent and 15-30 parts of active filler. According to the invention, solid additives with the particle sizes from small to large are mixed step by step, so that the solid additives at all levels are fully mixed, soft magnetic powder is filled in gaps of solid additive particles, and the solid additives are restricted by force, so that the solid additives have the function of thickening and sealing after being mixed in lubricating grease, a gap between sealing grease and a shield tail is avoided, and the sealing property and the water resistance are greatly improved; the radish seed extract contains erucic acid, linoleic acid, linolenic acid and erucic acid glyceride in amounts, so that the degradation effect of base oil can be effectively improved, and the waterproof effect of the lubricating grease can be improved by adding the radish seed extract.
Description
Technical Field
The invention relates to the technical field of lubricating grease, in particular to environment-friendly shield tail sealing grease and a preparation method thereof.
Background
The shield tunneling machine is a preferred excavating tool for excavating urban subway tunnels, has the advantages of no influence of ground buildings and geographic environments, is particularly wide in application range, and can completely meet the strict requirements of urban tunnel construction. The shield tail sealing system is a sealing device designed for preventing soil layers, sand layers, water layers and slurry around the shield tail from entering the shield machine from gaps between the shield tail and the duct piece. The shield tail sealing grease is injected into a sealing cavity between three rows of stainless steel wire brushes from the shield tail through a grease pump in real time and keeps a dynamic full state so as to meet the requirements of sealing and protecting shield construction. Generally, shield tail grease consumption of a shield machine (diameter is 6.4 m) for urban subways is about 20-40 kg/m, special stratum consumption is 80-100 kg/m, and shield tail grease consumption per kilometer is 20-40 tons on average.
Under geological conditions of crossing rivers, lakes, seas and the like, the condition of underground water is often very complicated, the hydrostatic pressure of a tunnel is usually very high, and the water pressure borne by the shield can reach more than 0.6 MPa. In the shield construction process, sudden gushing and sand flow are easily caused, so that a large-range sudden collapse and water seepage and leakage accidents are caused. Therefore, under the high water pressure environment, higher quality standard requirements are provided for the waterproof sealing performance of the shield tail sealing grease.
Disclosure of Invention
The invention aims to provide environment-friendly shield tail sealing grease and a preparation method thereof, which can enhance the water resistance and the sealing performance of lubricating grease and can be used for construction in a high water pressure environment.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an environment-friendly shield tail sealing grease is mainly composed of the following raw materials in parts by weight: 100-150 parts of lubricating grease, 25-45 parts of solid additive, 8-10 parts of tackifier, 4-5 parts of water-absorbing expanding agent and 15-30 parts of active filler; the solid additive is prepared from a solid additive with the particle size of 0.5-10 mu m, a solid additive with the particle size of 10-20 mu m, a solid additive with the particle size of 20-40 mu m, a solid additive with the particle size of 40-50 mu m and soft magnetic powder according to the weight ratio of 5-25: 20-50: 10-40: 10-40: 10-15 are compounded.
Preferably, the solid additive with the particle size of 0.5-10 μm is calcium carbonate; the solid additive with the particle size of 10-20 mu m is prepared from asbestos and composite fibers according to the weight ratio of (1-3): 5, mixing the components; the solid additive with the particle size of 20-40 mu m is prepared from plant fibers and composite fibers according to the weight ratio (3-5): 1, mixing; the solid additive with the grain diameter of 40-50 mu m is plant fiber.
Preferably, the soft magnetic powder is ferrite soft magnetic material powder, and the particle size of the soft magnetic powder is 0.5 to 10 μm.
Preferably, the lubricating grease mainly comprises base grease, radish seed extract and buckeye seed extract according to the weight ratio of (5-7): (3-2): (1-2), wherein the base grease is one or more of calcium grease, composite calcium grease, sodium grease, lithium grease, composite lithium grease, aluminum grease, composite aluminum grease, titanium grease, composite titanium grease, polyurea grease and composite polyurea grease.
Preferably, the tackifier is polyisobutylene, which has a molecular weight of 1000-2400.
Preferably, the water-absorbing swelling agent is one or a mixture of two of high-sodium bentonite and sodium polyacrylate, the 0.075mm screen residue of the high-sodium bentonite is less than or equal to 4%, and the content of the sodium polyacrylate is more than or equal to 97%.
Preferably, the active filler is one or a mixture of two of active talcum powder, active calcium carbonate and active mica powder.
A preparation method of environment-friendly shield tail sealing grease comprises the following steps:
(1) adding soft magnetic powder into solid additive with particle size of 0.5-10 μm, mixing, adding solid additive with particle size of 10-20 μm, mixing, adding solid additive with particle size of 20-40 μm, mixing, adding solid additive with particle size of 40-50 μm, and mixing;
(2) placing the specified weight part of lubricating grease in a kneader, stirring for 10-15min at 50-60 ℃ and 150r/min, then adding the specified weight part of solid additive, and continuing stirring for 15-30min at 50-60 ℃ and 150 r/min;
(3) and (3) sequentially adding a tackifier and a water-absorbing expanding agent into the mixture of the lubricating grease and the solid additive in the step (2), stirring and kneading until the materials are uniform, finally adding an active filler, and stirring and kneading for 60-120min to obtain the lubricating grease.
The invention has the beneficial effects that: compared with the prior art, the environment-friendly shield tail sealing grease and the preparation method thereof have the following advantages: (1) according to the invention, solid additives with the particle sizes from small to large are mixed step by step, so that the solid additives at all levels are fully mixed and coated, and soft magnetic powder is filled in gaps among solid additive particles, so that the solid additives are restricted by force, the solid additives play a thickening and sealing role after lubricating grease is mixed, a gap between sealing grease and a shield tail is avoided, and the sealing property and the water resistance are greatly improved; (2) the lubricating grease mainly comprises a radish seed extract and a buckeye extract, and takes a conventional base fat as an auxiliary, the radish seed extract contains erucic acid, linoleic acid, linolenic acid and erucic acid glyceride which can effectively improve the degradation effect of base oil, and the addition of the buckeye extract can play a role in thickening and improve the waterproof effect of the lubricating grease.
Detailed Description
Example 1
An environment-friendly shield tail sealing grease is mainly composed of the following raw materials in parts by weight: 125 parts of lubricating grease, 35 parts of solid additive, 9 parts of tackifier, 5 parts of water-absorbing expanding agent and 23 parts of active filler; the solid additive is prepared from a solid additive with the particle size of 0.5-10 mu m, a solid additive with the particle size of 10-20 mu m, a solid additive with the particle size of 20-40 mu m, a solid additive with the particle size of 40-50 mu m and soft magnetic powder according to the weight ratio of 15: 35: 19: 22: 12 are compounded.
The solid additive with the particle size of 0.5-10 mu m is calcium carbonate; the solid additive with the grain diameter of 10-20 mu m is prepared from asbestos and composite fiber according to the weight ratio of 2: 5, mixing the components; the solid additive with the particle size of 20-40 mu m is prepared from plant fibers and composite fibers according to the weight ratio of 4: 1, mixing; the solid additive with the grain diameter of 40-50 μm is plant fiber.
The soft magnetic powder is ferrite soft magnetic material powder, and the particle size of the soft magnetic powder is 0.5-10 mu m.
The lubricating grease is prepared from basic grease, a radish seed extract and a buckeye extract according to the weight ratio of 6: 3: 1, wherein the basic fat is a compound calcium-based fat.
The tackifier is polyisobutylene with the molecular weight of 1000-2400.
The water-absorbing swelling agent is high-sodium bentonite, and 0.075mm screen residue of the high-sodium bentonite is less than or equal to 4%.
The active filler is active talcum powder.
A preparation method of environment-friendly shield tail sealing grease comprises the following steps:
(1) adding soft magnetic powder into solid additive with particle size of 0.5-10 μm, mixing, adding solid additive with particle size of 10-20 μm, mixing, adding solid additive with particle size of 20-40 μm, mixing, adding solid additive with particle size of 40-50 μm, and mixing;
(2) putting the grease in a kneader, stirring at 50-60 ℃ for 12min at 120r/min, adding the solid additive in the weight portion, and continuously stirring at 50-60 ℃ for 25min at 120 r/min;
(3) and (3) sequentially adding a tackifier and a water-absorbing expanding agent into the mixture of the lubricating grease and the solid additive in the step (2), stirring and kneading until the materials are uniform, finally adding an active filler, and stirring and kneading for 85min to obtain the lubricating grease.
Example 2
An environment-friendly shield tail sealing grease is mainly composed of the following raw materials in parts by weight: 100 parts of lubricating grease, 25 parts of solid additive, 8 parts of tackifier, 4 parts of water-absorbing expanding agent and 15 parts of active filler; the solid additive is prepared from a solid additive with the particle size of 0.5-10 mu m, a solid additive with the particle size of 10-20 mu m, a solid additive with the particle size of 20-40 mu m, a solid additive with the particle size of 40-50 mu m and soft magnetic powder according to the weight ratio of 5: 20: 10: 10: 10 are compounded.
The solid additive with the particle size of 0.5-10 mu m is calcium carbonate; the solid additive with the grain diameter of 10-20 mu m is prepared from asbestos and composite fiber according to the weight ratio of 1: 5, mixing the components; the solid additive with the particle size of 20-40 mu m is prepared from plant fibers and composite fibers according to the weight ratio of 3: 1, mixing; the solid additive with the grain diameter of 40-50 μm is plant fiber.
The soft magnetic powder is ferrite soft magnetic material powder, and the particle size of the soft magnetic powder is 0.5-10 mu m.
The lubricating grease is prepared from basic grease, a radish seed extract and a buckeye extract according to a weight ratio of 5: 3: 1, wherein the base grease is formed by mixing composite lithium base grease and composite aluminum base grease.
The tackifier is polyisobutylene with the molecular weight of 1000-2400.
The water-absorbing swelling agent is sodium polyacrylate, and the content of sodium polyacrylate is more than or equal to 97%.
The active filler is active calcium carbonate.
A preparation method of environment-friendly shield tail sealing grease comprises the following steps:
(1) adding soft magnetic powder into solid additive with particle size of 0.5-10 μm, mixing, adding solid additive with particle size of 10-20 μm, mixing, adding solid additive with particle size of 20-40 μm, mixing, adding solid additive with particle size of 40-50 μm, and mixing;
(2) putting the grease in a kneader, stirring for 10min at 50-60 ℃ at 100r/min, then adding the solid additive in the prescribed weight part, and continuously stirring for 15min at 50-60 ℃ at 100 r/min;
(3) and (3) sequentially adding a tackifier and a water-absorbing expanding agent into the mixture of the lubricating grease and the solid additive in the step (2), stirring and kneading until the materials are uniform, finally adding an active filler, and stirring and kneading for 70min to obtain the lubricating grease.
Example 3
An environment-friendly shield tail sealing grease is mainly composed of the following raw materials in parts by weight: 150 parts of lubricating grease, 45 parts of solid additive, 10 parts of tackifier, 5 parts of water-absorbing expanding agent and 30 parts of active filler; the solid additive is prepared from a solid additive with the particle size of 0.5-10 mu m, a solid additive with the particle size of 10-20 mu m, a solid additive with the particle size of 20-40 mu m, a solid additive with the particle size of 40-50 mu m and soft magnetic powder according to the weight ratio of 25: 50: 40: 40: 15 are compounded.
The solid additive with the particle size of 0.5-10 mu m is calcium carbonate; the solid additive with the grain diameter of 10-20 mu m is prepared from asbestos and composite fiber according to the weight ratio of 3: 5, mixing the components; the solid additive with the particle size of 20-40 mu m is prepared from plant fibers and composite fibers according to the weight ratio of 5: 1, mixing; the solid additive with the grain diameter of 40-50 μm is plant fiber.
The soft magnetic powder is ferrite soft magnetic material powder, and the particle size of the soft magnetic powder is 0.5-10 mu m.
The lubricating grease is prepared from basic grease, a radish seed extract and a buckeye extract according to a weight ratio of 7: 2: 2, wherein the base grease is polyurea grease.
The tackifier is polyisobutylene with the molecular weight of 1000-2400.
The water-absorbing swelling agent is high-sodium bentonite, and 0.075mm screen residue of the high-sodium bentonite is less than or equal to 4%.
The active filler is active mica powder.
A preparation method of environment-friendly shield tail sealing grease comprises the following steps:
(1) adding soft magnetic powder into solid additive with particle size of 0.5-10 μm, mixing, adding solid additive with particle size of 10-20 μm, mixing, adding solid additive with particle size of 20-40 μm, mixing, adding solid additive with particle size of 40-50 μm, and mixing;
(2) putting the grease in a kneader, stirring for 15min at 50-60 ℃ at 150r/min, adding the solid additive in the prescribed weight part, and continuously stirring for 30min at 50-60 ℃ at 150 r/min;
(3) and (3) sequentially adding a tackifier and a water-absorbing expanding agent into the mixture of the lubricating grease and the solid additive in the step (2), stirring and kneading until the materials are uniform, finally adding an active filler, and stirring and kneading for 120min to obtain the lubricating grease.
Comparative example 1
The raw material composition of the environment-friendly shield tail sealing grease of the comparative example 1 is basically the same as that of the example 1, and the difference is that: the solid additive with the particle size of 10-20 mu m is prepared from asbestos and composite fibers according to the weight ratio of 1: 1 are mixed.
The preparation method of the environment-friendly shield tail sealing grease of the comparative example 1 is the same as that of the example 1.
Test example 1
The environment-friendly shield tail sealing grease prepared in examples 1 to 3 and comparative example 1 was subjected to a performance test, and the test results are shown in table 1:
TABLE 1
| Test items | Test method | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Water shower loss (1h,38 ℃)/%) | ASTMP4049 | 0.078 | 0.93 | 0.12 | 1.35 |
| Water tightness (25 ℃, 3.5 MPa)/% | MATSUMURA | 0 | 0 | 0 | 0.19 |
| Biodegradation Rate/% | C.E.C | 99.2 | 98.8 | 97.6 | 85.1 |
As can be seen from Table 1, the environment-friendly shield tail sealing grease prepared in the embodiments 1-3 of the present invention has better water resistance and biodegradability.
The above embodiments are only specific examples of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any suitable changes or modifications made by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides an environment-friendly shield tail seals fat which characterized in that: the material mainly comprises the following raw materials in parts by weight: 100-150 parts of lubricating grease, 25-45 parts of solid additive, 8-10 parts of tackifier, 4-5 parts of water-absorbing expanding agent and 15-30 parts of active filler; the solid additive is prepared from a solid additive with the particle size of 0.5-10 mu m, a solid additive with the particle size of 10-20 mu m, a solid additive with the particle size of 20-40 mu m, a solid additive with the particle size of 40-50 mu m and soft magnetic powder according to the weight ratio of 5-25: 20-50: 10-40: 10-40: 10-15 are compounded.
2. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the solid additive with the particle size of 0.5-10 mu m is calcium carbonate.
3. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the solid additive with the particle size of 10-20 mu m is prepared from asbestos and composite fibers according to the weight ratio of (1-3): 5, mixing the components.
4. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the solid additive with the particle size of 20-40 mu m is prepared from plant fibers and composite fibers according to the weight ratio (3-5): 1 are mixed.
5. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the solid additive with the grain diameter of 40-50 mu m is plant fiber.
6. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the soft magnetic powder is ferrite soft magnetic material powder, and the particle size of the soft magnetic powder is 0.5-10 mu m.
7. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the lubricating grease mainly comprises base grease, radish seed extract and buckeye extract according to the weight ratio (5-7): (3-2): (1-2), wherein the base grease is one or more of calcium grease, composite calcium grease, sodium grease, lithium grease, composite lithium grease, aluminum grease, composite aluminum grease, titanium grease, composite titanium grease, polyurea grease and composite polyurea grease.
8. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the tackifier is polyisobutylene with the molecular weight of 1000-2400.
9. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the water-absorbing swelling agent is one or a mixture of two of high-sodium bentonite and sodium polyacrylate, the 0.075mm screen residue of the high-sodium bentonite is less than or equal to 4%, and the sodium polyacrylate content is more than or equal to 97%.
10. The environment-friendly shield tail sealing grease as claimed in claim 1, wherein: the active filler is one or a mixture of two of active talcum powder, active calcium carbonate and active mica powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011101797.6A CN114369485A (en) | 2020-10-15 | 2020-10-15 | Environment-friendly shield tail sealing grease and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011101797.6A CN114369485A (en) | 2020-10-15 | 2020-10-15 | Environment-friendly shield tail sealing grease and preparation method thereof |
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| Publication Number | Publication Date |
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| CN114369485A true CN114369485A (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011101797.6A Pending CN114369485A (en) | 2020-10-15 | 2020-10-15 | Environment-friendly shield tail sealing grease and preparation method thereof |
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Application publication date: 20220419 |