CN117703936A - Bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and manufacturing method - Google Patents
Bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and manufacturing method Download PDFInfo
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- CN117703936A CN117703936A CN202311704147.4A CN202311704147A CN117703936A CN 117703936 A CN117703936 A CN 117703936A CN 202311704147 A CN202311704147 A CN 202311704147A CN 117703936 A CN117703936 A CN 117703936A
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- silicon dioxide
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- 239000007787 solid Substances 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000004519 grease Substances 0.000 claims abstract description 52
- 238000005096 rolling process Methods 0.000 claims abstract description 49
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 41
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 39
- 230000001050 lubricating effect Effects 0.000 claims abstract description 32
- 239000003921 oil Substances 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 12
- HDFRDWFLWVCOGP-UHFFFAOYSA-N carbonothioic O,S-acid Chemical compound OC(S)=O HDFRDWFLWVCOGP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 9
- 235000013539 calcium stearate Nutrition 0.000 claims description 9
- 239000008116 calcium stearate Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- KAYAKFYASWYOEB-UHFFFAOYSA-N 3-octadec-1-enyloxolane-2,5-dione Chemical compound CCCCCCCCCCCCCCCCC=CC1CC(=O)OC1=O KAYAKFYASWYOEB-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
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- 239000010959 steel Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 229940078552 o-xylene Drugs 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- AGBQKNBQESQNJD-UHFFFAOYSA-N lipoic acid Chemical compound OC(=O)CCCCC1CCSS1 AGBQKNBQESQNJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 238000004108 freeze drying Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
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- 238000002156 mixing Methods 0.000 claims 1
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- 229960002663 thioctic acid Drugs 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 125000000217 alkyl group Chemical group 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000010687 lubricating oil Substances 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
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- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
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- 230000004048 modification Effects 0.000 description 3
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- 150000001335 aliphatic alkanes Chemical group 0.000 description 2
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Lubricants (AREA)
Abstract
The invention belongs to the technical field of reinforced sealing sundries prevention of solid oil rolling bearings, in particular to a bearing with reinforced sealing solid oil lubricity, water resistance and sundries prevention and a manufacturing method thereof, comprising a porous rolling bearing base and functional lubricating grease poured into a circular through hole on the upper surface of a retainer of the porous rolling bearing base, wherein the porous rolling bearing base comprises an outer ring, an inner ring, a retainer and rolling bodies; the modified nano silicon dioxide in the functional lubricating grease contains a nano silicon dioxide structure, an alkyl long chain and a dynamic disulfide bond, the modified nano silicon dioxide is introduced into the functional lubricating grease, the modified nano silicon dioxide can be in synergistic effect with high-strength high-modulus polyethylene fibers, the wear resistance of the functional lubricating grease is improved, meanwhile, the functional lubricating grease has enough toughness, has a waterproof and sundry-proof effect, can effectively protect a bearing, prolongs the service life, and can be fully covered by the functional lubricating grease through improvement of a process, has good sealing performance, is not required to be maintained by adding lubricating oil, and achieves real maintenance-free performance.
Description
Technical Field
The invention relates to the technical field of reinforced sealing and sundry prevention of solid oil rolling bearings, in particular to a reinforced sealing solid oil lubricating waterproof sundry-proof bearing and a manufacturing method thereof.
Disclosure of Invention
Bearings are the basis of transmission and are an indispensable element in the mechanical industry. The most widely used oil-retaining bearing (porous bearing) at present, wherein the polymer oil-retaining bearing has the advantages of freely adjusting the number, the size, the shape and the distribution of pores in the manufacturing process, along with simple manufacturing process and easy production, and is widely applied to various fields such as agricultural machinery, textile machinery, vehicle manufacturing and the like.
In the prior art, the polymer oil-containing bearing, in the rotation process, the sealing cover can be damaged by sundries such as silt, straw and the like, so that the bearing is invalid, or lubricating oil leaks out, and the bearing can be worn and invalid after being used for a period of time.
Therefore, it is needed to provide a bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance, which improves the sundry sealing resistance and maintenance-free effect of the bearing, and further improves the wear resistance of the bearing.
The invention aims to provide a bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and a manufacturing method thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a bearing for enhancing the lubricity of sealed solid oil, water resistance and sundries resistance comprises a porous rolling bearing base and functional lubricating grease poured into a circular through hole on the upper surface of a porous bearing base retainer;
a porous rolling bearing base including an outer ring, an inner ring, a cage, and rolling elements;
the manufacturing method of the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance comprises the following steps:
step S1, cleaning: placing the porous rolling bearing base in acetone, stirring at 35-45deg.C for 12-18h, taking out, cleaning with absolute ethanol for 3-5 times, and wiping with cleaning wipe to obtain pretreated porous rolling bearing base;
step S2, drilling: respectively placing acrylic plates on two sides of a first fixing surface of an inner ring of a pretreated porous rolling bearing base and a second fixing surface of the inner ring, uniformly forming round through holes with the diameter of 2mm on the upper surface and the lower surface of a retainer of the porous rolling bearing base by using drilling equipment, injecting functional lubricating grease through a high-pressure grease gun to fill the periphery of a rolling body and the retainer, removing the acrylic plates, placing the rolling body and the retainer at 150-250 ℃ for 15-120min, placing the rolling body and the retainer at 5-15MPa, naturally cooling for 10-30min, and sealing by a punching steel plate dust cover to obtain the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance.
And (2) through the process treatment in the step (S2), all parts of the outer ring, the inner ring, the outer ball, the outer roller and the retainer of the prepared porous rolling bearing base are filled with functional lubricating grease, and the functional lubricating grease finally prepared is solid colloid through thermosetting setting.
Further, in step S2, the thickness of the acrylic plate is 1cm.
Further, in step S2, the diameter of the circular through hole is 2mm.
Further, the preparation method of the functional lubricating grease comprises the following steps:
step A1, preparing the following raw materials in parts by weight: 60-90 parts of high-temperature lubricating grease, 5-35 parts of high-strength high-modulus polyethylene fiber powder, 1-10 parts of calcium stearate and 3-6 parts of modified nano silicon dioxide;
and A2, adding high-strength high-modulus polyethylene fiber powder and calcium stearate into the high-temperature lubricating grease according to parts by weight, heating to 110-130 ℃, and continuing to stir and react for 6-8 hours to obtain the functional lubricating grease.
Further, the high-temperature grease is a No. 2 national high-temperature grease.
Further, the high-strength high-modulus polyethylene fiber powder is a commercially available TiconaGUR4150 powder having a relative molecular mass of about 9.2X10 6 The average particle diameter was 120. Mu.m.
Further, the preparation method of the modified nano silicon dioxide comprises the following steps:
step B1, dissolving DL-thiooctanoic acid in absolute ethyl alcohol, dropwise adding a mixed solution of octadecenylsuccinic anhydride and isopropanol, heating to reflux after the dropwise adding is finished, continuously stirring for 4-6 hours, standing for 1-3 hours after the reaction is finished, carrying out suction filtration, washing a filter cake with deionized water for 3-5 times, and freeze-drying to obtain mercaptocarboxylic acid, wherein the dosage ratio of the DL-lipoic acid to the absolute ethyl alcohol to the mixed solution is 4-8g:60-80mL:70-140mL, wherein the dosage ratio of the octadecenyl succinic anhydride to the isopropanol in the mixed solution is 1g:10mL, the carboxyl in the DL-lipoic acid structure reacts with octadecenyl succinic anhydride to obtain mercapto carboxylic acid;
step B2, dissolving mercapto carboxylic acid in o-xylene, adding nano silicon dioxide, carrying out ultrasonic dispersion uniformly to obtain nano silicon dioxide suspension, heating to 45-55 ℃ while stirring, continuously stirring and reacting for 2-3 hours, precipitating and centrifuging after the reaction is finished, washing 3-5 times by using anhydrous toluene, and drying at 120 ℃ for 6-8 hours to obtain modified nano silicon dioxide, wherein the dosage ratio of the mercapto carboxylic acid, the o-xylene and the nano silicon dioxide is 4.5-7.5g:65-85mL: and 0.5-1g, wherein in the reaction process, o-xylene is used as a solvent, carboxyl on mercapto carboxylic acid and hydroxyl on nano silicon dioxide are chemically bonded to obtain modified nano silicon dioxide, the mercapto carboxylic acid contains a hydrophobic long-chain alkane structure, and the dispersibility and compatibility of the nano silicon dioxide on a substrate are enhanced through the modification.
The porous rolling bearing base is any one of a deep groove ball bearing, an outer spherical bearing, a self-aligning ball bearing, a self-aligning roller bearing, a tapered roller bearing, and a planar thrust ball bearing. Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the functional grease is added into the bearing, the functional grease contains modified nano silicon dioxide, the modified nano silicon dioxide contains a nano silicon dioxide structure, alkyl long chains and dynamic disulfide bonds, the surface of the nano silicon dioxide contains a plurality of active hydroxyl groups, a relatively stable complex can be formed with calcium stearate, meanwhile, the wear resistance of the nano silicon dioxide is exerted, the wear resistance of the functional grease is improved, the service life of the bearing is further prolonged, the existence of the alkyl long chains improves the fat solubility of the nano silicon dioxide on one hand, the dispersibility and the compatibility of the nano silicon dioxide in the grease are improved, on the other hand, the interpenetrating network formed by the modified nano silicon dioxide and the alkyl long chains on the calcium stearate plays a role of dispersing stress, crack expansion after long-chain alkane stress is avoided, the functional wear resistance is further improved, the existence of the dynamic disulfide bonds can realize room temperature self-repairing performance, the functional wear resistance is further endowed, the functional grease is introduced into the functional grease, the functional grease can cooperate with high-strength high-modulus polyethylene fibers, and the functional grease wear resistance is further improved.
(2) In the preparation process, the high-toughness high-strength high-modulus polyethylene fiber and the modified nano silicon dioxide are added, the prepared functional lubricating grease is solid after being cooled, has enough toughness, has the waterproof and sundry-proof effects, can effectively protect the bearing, prolongs the service life, and simultaneously, the functional lubricating grease can fully cover the inner ring, the outer side of the ball, the outer side of the roller and each part of the retainer of the porous rolling bearing base through the improvement of the process in the preparation process, has good sealing performance, does not need to be maintained by adding lubricating oil any more because of good sealing performance, achieves the real maintenance-free effect, and can be used on agricultural machinery and animal husbandry mechanical equipment, thereby solving the characteristics of sundry-proof sealing effect and maintenance-free under severe environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a bearing for enhancing lubricity of sealed solid oil, water resistance and sundries resistance;
FIG. 2 is a top cross-sectional view of a bearing of the present invention with enhanced sealing solid oil lubricity against water and debris;
in the drawings, the list of components represented by the various numbers is as follows:
1. a porous rolling bearing base; 101. an outer ring; 1011. a first fixing surface; 1012. a column; 1013. a second fixing surface; 102. a retainer; 1021. a circular through hole; 103. an inner ring; 104. rolling bodies.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Example 1
Preferably, the embodiment provides a preparation method of modified nano silicon dioxide, which comprises the following steps:
step B1, dropwise adding 6g of DL-sulfur Xin Suanrong into 70mL of absolute ethyl alcohol, dropwise adding a mixed solution of 10.5g of octadecenyl succinic anhydride and 105mL of isopropanol, heating to reflux after the dropwise adding is finished, continuously stirring for 5 hours, standing for 2 hours after the reaction is finished, carrying out suction filtration, washing a filter cake with deionized water for 4 times, and freeze-drying to obtain mercaptocarboxylic acid;
and B2, 6g of mercapto carboxylic acid is dissolved in 75mL of o-xylene, then 0.75g of nano silicon dioxide is added, ultrasonic dispersion is carried out uniformly, nano silicon dioxide suspension is obtained, stirring is carried out while heating to 50 ℃, stirring reaction is continued for 2.5h, after the reaction is finished, precipitation is centrifuged, washing is carried out for 4 times by using anhydrous toluene, and drying is carried out for 7h at 120 ℃ to obtain the modified nano silicon dioxide.
Example two
Preferably, the embodiment provides a preparation method of functional grease, which comprises the following steps:
step A1, preparing the following raw materials in parts by weight: 75 parts of No. 2 national high-temperature lubricating grease, 20 parts of high-strength high-modulus polyethylene fiber powder, 5.5 parts of calcium stearate and 4.5 parts of modified nano silicon dioxide prepared in the first embodiment;
and A2, adding high-strength high-modulus polyethylene fiber powder and calcium stearate into the No. 2 national high-temperature lubricating grease according to parts by weight, heating to 120 ℃, and continuing to stir and react for 7 hours to obtain the functional lubricating grease.
Example III
Referring to fig. 1 and 2, the present embodiment provides a bearing for enhancing lubricity of sealed solid oil, which comprises a porous rolling bearing base (1) and functional grease prepared in the second embodiment and poured into a circular through hole (1021) on the upper surface of a porous bearing base retainer (102);
a porous rolling bearing base (1) comprising an outer ring (101), an inner ring (103), a cage (102), and rolling elements (104);
the outer ring (101) comprises a first fixing surface (1011), a cylinder (1012) and a second fixing surface (1013), wherein the first fixing surface (1011) is positioned right above the second fixing surface (1013);
the manufacturing method of the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance comprises the following steps:
step S1, cleaning: placing the porous rolling bearing base (1) in acetone, stirring at 35 ℃ for 12 hours, taking out, cleaning with absolute ethyl alcohol for 3 times, and wiping with a cleaning wipe to obtain a pretreated porous rolling bearing base;
step S2, drilling: the method comprises the steps of respectively placing 1cm thick acrylic plates on two sides of a first fixing surface (1011) and a second fixing surface (1012) of a pretreatment porous rolling bearing base (1), uniformly forming round through holes (1021) with the thickness of 2mm on the upper surface of a retainer (102) by using drilling equipment, injecting functional lubricating grease through a high-pressure grease gun to fill the periphery of a rolling body (104) and the retainer (102), removing the acrylic plates, placing the acrylic plates at 150 ℃ for 15min, placing the acrylic plates at 5MPa again, naturally cooling for 10min, sealing by using a punching type steel plate dust cover, and obtaining the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance.
Example IV
Referring to fig. 1 and 2, the present embodiment provides a bearing for enhancing lubricity of sealed solid oil, which comprises a porous rolling bearing base (1) and functional grease prepared in the second embodiment and poured into a circular through hole (1021) on the upper surface of a porous bearing base retainer (102);
a porous rolling bearing base (1) comprising an outer ring (101), an inner ring (103), a cage (102), and rolling elements (104);
the outer ring (101) comprises a first fixing surface (1011), a cylinder (1012) and a second fixing surface (1013), wherein the first fixing surface (1011) is positioned right above the second fixing surface (1013);
the manufacturing method of the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance comprises the following steps:
step S1, cleaning: placing the porous rolling bearing base in acetone, stirring at 40 ℃ for 15 hours, taking out, cleaning with absolute ethyl alcohol for 4 times, and wiping with a cleaning wipe to obtain a pretreated porous rolling bearing base;
step S2, drilling: the method comprises the steps of respectively placing 1cm thick acrylic plates on two sides of a first fixing surface (1011) and a second fixing surface (1012) of a pretreatment porous rolling bearing base (1), uniformly forming round through holes (1021) with the thickness of 2mm on the upper surface of a retainer (102) by using drilling equipment, injecting functional lubricating grease through a high-pressure grease gun to fill the periphery of a rolling body (104) and the retainer (102), removing the acrylic plates, placing the acrylic plates at 200 ℃ for 65min, placing the acrylic plates at 10MPa, naturally cooling for 20min, sealing by using a punching type steel plate dust cover, and obtaining the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance.
Example five
Referring to fig. 1 and 2, the present embodiment provides a bearing for enhancing lubricity of sealed solid oil, which comprises a porous rolling bearing base (1) and functional grease prepared in the second embodiment and poured into a circular through hole (1021) on the upper surface of a porous bearing base retainer (102);
a porous rolling bearing base (1) comprising an outer ring (101), an inner ring (103), a cage (102), and rolling elements (104);
the outer ring (101) comprises a first fixing surface (1011), a cylinder (1012) and a second fixing surface (1013), wherein the first fixing surface (1011) is positioned right above the second fixing surface (1013);
the manufacturing method of the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance comprises the following steps:
step S1, cleaning: placing the porous rolling bearing base in acetone, stirring at 45 ℃ for 18 hours, taking out, washing with absolute ethyl alcohol for 5 times, and wiping with a cleaning wipe to obtain a pretreated porous rolling bearing base (1);
step S2, drilling: the method comprises the steps of respectively placing 1cm thick acrylic plates on two sides of a first fixing surface (1011) and a second fixing surface (1012) of a pretreatment porous rolling bearing base (1), uniformly forming round through holes (1021) with the thickness of 2mm on the upper surface of a retainer (102) by using drilling equipment, injecting functional lubricating grease through a high-pressure grease gun to fill the periphery of a rolling body (104) and the retainer (102), removing the acrylic plates, placing the acrylic plates at 250 ℃ for 120min, placing the acrylic plates at 15MPa, naturally cooling for 30min, sealing by using a punching type steel plate dust cover, and obtaining the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance.
Comparative example one
The DL-lipoic acid in example 1 is replaced by octanoic acid, the rest of raw materials and the preparation process are kept unchanged, and then the prepared substance is replaced by the modified nano silicon dioxide in example two, and the rest of raw materials and the preparation process are kept unchanged.
Comparative example two
The octadecenyl succinic anhydride in the first embodiment is removed, the rest raw materials and the preparation process are kept unchanged, and then the prepared substance is replaced by the modified nano silicon dioxide in the second embodiment, and the rest raw materials and the preparation process are kept unchanged.
Comparative example three
The modified nano silicon dioxide in the second embodiment is replaced by the nano silicon dioxide in the step B2 in the first embodiment, and the rest raw materials and the preparation process are kept unchanged.
Comparative example four
The modified nano silicon dioxide in the second embodiment is removed, and the rest raw materials and the preparation process are kept unchanged.
Performance detection
Tribological performance test: the tribological properties of the functional greases prepared in the second example and the first to fourth comparative examples are evaluated and detected by using an Optimel-SRV-IV frictional wear testing machine with ball-and-disc contact;
test conditions: the test results of the test are shown in the following table 1, wherein the load is 200N, the frequency is 25Hz, the amplitude is 1mm, the temperature is 25 ℃, the experimental period is 30min, the upper test sample of the friction pair is a steel ball with the diameter of 10mm, the lower test sample is a steel block with the diameter of 30 mm:
TABLE 1
| Project | Average coefficient of friction | Average wear volume 105/μm 3 |
| Example two | 0.112 | 1.36 |
| Comparative example one | 0.122 | 110.34 |
| Comparative example two | 0.137 | 170.46 |
| Comparative example three | 0.153 | 332.27 |
| Comparative example four | 0.196 | 479.64 |
As can be seen from the data in table 1, the functional grease prepared in example two has more excellent antifriction and antiwear properties than those prepared in comparative examples one to four.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The bearing comprises a porous rolling bearing base (1), wherein the porous rolling bearing base (1) comprises an outer ring (101), an inner ring (103), a retainer (102) and rolling bodies (104);
the outer ring (101) comprises a first fixing surface (1011), a cylinder (1012) and a second fixing surface (1013), wherein the first fixing surface (1011) is positioned right above the second fixing surface (1013);
the method is characterized in that: functional grease is poured into the round through hole (1021) on the upper surface of the retainer (102);
the functional lubricating grease is prepared by blending high-temperature lubricating grease, high-strength high-modulus polyethylene fiber powder, calcium stearate and modified nano silicon dioxide;
the modified nano silicon dioxide is prepared by carrying out ring opening reaction on L-lipoic acid and octadecenyl succinic anhydride to obtain mercapto carboxylic acid, and then carrying out chemical bonding with the nano silicon dioxide.
2. The bearing for reinforcing the lubricity of a sealed solid oil against water and debris of claim 1, wherein: the preparation method of the functional lubricating grease comprises the following steps:
step A1, preparing the following raw materials in parts by weight: 60-90 parts of high-temperature lubricating grease, 5-35 parts of high-strength high-modulus polyethylene fiber powder, 1-10 parts of calcium stearate and 3-6 parts of modified nano silicon dioxide;
and A2, adding high-strength high-modulus polyethylene fiber powder and calcium stearate into the high-temperature lubricating grease according to parts by weight, heating to 110-130 ℃, and continuing to stir and react for 6-8 hours to obtain the functional lubricating grease.
3. The bearing for reinforcing the lubricity of a sealed solid oil against water and debris of claim 1, wherein: the preparation method of the modified nano silicon dioxide comprises the following steps:
step B1, dissolving DL-thiooctanoic acid in absolute ethyl alcohol, dropwise adding a mixed solution of octadecenyl succinic anhydride and isopropanol, heating to reflux after the dropwise adding is finished, continuously stirring for 4-6 hours, standing for 1-3 hours after the reaction is finished, carrying out suction filtration, washing a filter cake with deionized water for 3-5 times, and freeze-drying to obtain mercaptocarboxylic acid;
and B2, dissolving mercapto carboxylic acid in o-xylene, adding nano silicon dioxide, uniformly dispersing by ultrasonic to obtain nano silicon dioxide suspension, heating to 45-55 ℃ while stirring, continuously stirring and reacting for 2-3h, centrifuging the precipitate after the reaction is finished, washing 3-5 times by using anhydrous toluene, and drying at 120 ℃ for 6-8h to obtain the modified nano silicon dioxide.
4. A water-and debris-resistant bearing for reinforcing a lubricity of a seal solid oil according to claim 3, wherein: in the step B1, the dosage ratio of DL-lipoic acid, absolute ethyl alcohol and mixed solution is 4-8g:60-80mL:70-140mL, wherein the dosage ratio of the octadecenyl succinic anhydride to the isopropanol in the mixed solution is 1g:10mL.
5. The waterproof and sundry-proof bearing for reinforcing the lubricity of sealed solid oil according to claim 2, wherein: in the step B2, the dosage ratio of the mercapto carboxylic acid, the o-xylene and the nano silicon dioxide is 4.5-7.5g:65-85mL:0.5-1g.
6. The waterproof and sundry-proof bearing for reinforcing the lubricity of sealed solid oil according to claim 2, wherein: the high-temperature lubricating grease is No. 2 national high-temperature lubricating grease.
7. The waterproof and sundry-proof bearing for reinforcing the lubricity of sealed solid oil according to claim 2, wherein: the high-strength high-modulus polyethylene fiber powder is commercially available TiconaGUR4150 powder, and the relative molecular weight of the high-strength high-modulus polyethylene fiber powder is about 9.2 multiplied by 10 6 The average particle diameter was 120. Mu.m.
8. The method for manufacturing the bearing with enhanced lubricity of the sealed solid oil, water resistance and sundries resistance according to any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
step S1, cleaning: placing the porous rolling bearing base (1) in acetone, stirring at 35-45 ℃ for 12-18h, taking out, cleaning with absolute ethyl alcohol for 3-5 times, and wiping with a cleaning wipe to obtain a pretreated porous rolling bearing base (1);
step S2, drilling: the method comprises the steps of respectively placing acrylic plates on two sides of a first fixing surface (1011) and a second fixing surface (1012) of a pretreated porous rolling bearing base (1), uniformly forming round through holes (1021) with the diameter of 2mm on the upper surface of a retainer (102) by using drilling equipment, injecting functional lubricating grease through a high-pressure grease gun to fill the periphery of a rolling body (104) and the retainer (102), removing the acrylic plates, placing the acrylic plates at 150-250 ℃ for 15-120min, placing the acrylic plates at 5-15MPa, naturally cooling for 10-30min, sealing by using a punching steel plate dust cover, and obtaining the bearing with enhanced sealing solid oil lubricity, water resistance and sundries resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311704147.4A CN117703936A (en) | 2023-12-13 | 2023-12-13 | Bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311704147.4A CN117703936A (en) | 2023-12-13 | 2023-12-13 | Bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and manufacturing method |
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| CN117703936A true CN117703936A (en) | 2024-03-15 |
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| CN202311704147.4A Pending CN117703936A (en) | 2023-12-13 | 2023-12-13 | Bearing with enhanced sealing solid oil lubricity, water resistance and sundry resistance and manufacturing method |
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| Country | Link |
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| CN (1) | CN117703936A (en) |
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