Double-lubrication retainer composite material, preparation method thereof, retainer and bearing

Abstract

The invention relates to a double-lubrication retainer composite material and a preparation method thereof, a retainer and a bearing, and the preparation method comprises the following steps: respectively dipping foaming phenolic resin and solid lubrication modified phenolic resin in cotton cloth, and respectively drying to obtain first prepreg cloth and second prepreg cloth; the two kinds of prepreg cloth are sequentially wound and preformed on a pipe winding machine, the next kind of prepreg cloth is wound on the previous kind of prepreg cloth, sintering curing forming is conducted in a sintering furnace, and the double-lubrication retainer composite material is obtained. After the retainer is made of the material and is used on a bearing, in the initial starting stage of the bearing, the micropore oil-containing part of the retainer provides initial lubrication, the starting friction torque is small, the bearing operates flexibly without abnormal noise, and meanwhile, the solid lubrication part of the retainer is gradually formed along with the operation of the bearing and a transfer lubricating film; therefore, the long-service-life and pollution-free lubrication requirements of the bearing of the aerospace photoelectric system are met.

Description

Technical Field

[0001] This invention belongs to the fields of mechanical design and composite polymer material manufacturing, specifically relating to a dual-lubricated cage composite material and its preparation method, as well as the cage and bearing. Background Technology

[0002] Bearings used in aerospace optoelectronic systems operate in a high vacuum environment without additional lubrication for extended periods. To ensure a long service life for the bearings, the following two solutions are typically adopted: (1) single-stage thin oil lubrication, which involves storing approximately 20 wt% lubricating oil in the cage; and (2) solid lubrication, which uses a solid lubrication cage.

[0003] In the case of single-stage thin oil lubrication, during bearing operation, a large amount of lubricating oil will continuously creep and evaporate, posing a potential risk of contaminating the optical lens.

[0004] For solid lubrication, there is a problem that the solid lubricating material of the cage cannot form a lubricating film before it is transferred to the bearing raceway. This can cause dry friction between the cage and the other metal parts of the bearing, resulting in bearing vibration and abnormal noise, which cannot meet the user's requirements.

[0005] Therefore, there is an urgent need for a comprehensive lubrication solution that combines the advantages of both thin oil lubrication and solid lubrication, so as to meet the operational performance requirements and achieve a long service life during the operation of bearings in aerospace optoelectronic systems. Summary of the Invention

[0006] The purpose of this invention is to provide a method for preparing a dual-lubricated cage composite material, as well as a cage and bearing, which can simultaneously achieve both thin oil lubrication and solid lubrication, thus overcoming the shortcomings of the single lubrication method in existing optoelectronic system bearings.

[0007] To achieve the above objectives, the first technical solution adopted by the present invention is: a method for preparing a dual-lubricated retainer composite material. First, cotton cloth is impregnated with foamed phenolic resin and dried to obtain a first prepreg; then, cotton cloth is impregnated with solid lubricating modified phenolic resin and dried to obtain a second prepreg; finally, the two prepregs are wound sequentially on a tube winding machine to preform, with the latter prepreg wound on the former prepreg, and then sintered and cured in a sintering furnace to obtain the dual-lubricated retainer composite material. The winding sequence for the two types of prepregs is selected according to the bearing guidance method, as follows: if the bearing is externally guided, the second prepreg is wound first, and then the first prepreg is wound; if the bearing is internally guided, the first prepreg is wound first, and then the second prepreg is wound.

[0008] Furthermore, the foaming phenolic resin is composed of a mixture of low molecular weight phenolic resin, a foaming agent, a diluent, and a foaming aid, and the molecular weight M of the low molecular weight phenolic resin is... wIt is 400-600 g / mol.

[0009] Further, the preparation method of the foamed phenolic resin includes: first, adding phenol and formaldehyde into a reaction vessel at a molar ratio of 1:1, then adding ammonia water accounting for 1-10% of the mass of phenol, with a mass fraction of 25-28% for the ammonia water, and keeping the mixture at 40-60℃ for 20-60 min, and then at 65-85℃ for 40-120 min until emulsification and separation, and stopping the reaction; then, when the temperature of the reaction vessel drops to 50-60℃, vacuum dehydration is performed for 1-3 h / kg to obtain the low molecular weight phenolic resin; finally, fully dissolving DPT in acetone, and then fully dissolving urea in anhydrous ethanol, and mixing the two solutions with the low molecular weight phenolic resin evenly to obtain the foamed phenolic resin; wherein the amount of DPT used per kilogram of low molecular weight phenolic resin is 1-10 g, the total amount of acetone and ethanol is 200-400 ml, and the mass ratio of DPT to urea is 1:(1-3).

[0010] Furthermore, the solid lubricant modified phenolic resin is composed of a high molecular weight phenolic resin, a dopamine-treated solid lubricant, and an anhydrous ethanol diluent, and the molecular weight M of the high molecular weight phenolic resin is... w It is 1000-1500 g / mol.

[0011] Furthermore, the preparation method of the solid lubricating modified phenolic resin includes: first, adding phenol and formaldehyde to a reaction vessel at a molar ratio of 1:1, adding ammonia water accounting for 1-10% of the mass of phenol, with a mass fraction of 25-28% for the ammonia water, and sequentially maintaining the temperature at 40-60℃ for 20-60 min, at 65-85℃ for 40-120 min, and at 80-100℃ for 5-20 min, then stopping the reaction; then, when the temperature of the reaction vessel drops to 50-70℃, performing vacuum dehydration for 1.5-3.5 minutes. The high molecular weight phenolic resin was obtained by dispersing the dopamine-treated solid lubricant evenly in anhydrous ethanol, and then adding it to the prepared high molecular weight phenolic resin. The mixture was stirred continuously to form a homogeneous solution, thus obtaining the solid lubricant modified phenolic resin. The amount of solid lubricant used per kilogram of high molecular weight phenolic resin was 5-100g, and the amount of anhydrous ethanol was 150-300ml.

[0012] Furthermore, the solid lubricant is one or more of porous graphite lubricant, graphene nanospheres, molybdenum disulfide, and tungsten disulfide, wherein the specific surface area of ​​the porous graphite lubricant is 6-10 m². 2 / g, the particle size of graphene nanospheres is 10~60 nm, and the D50 of molybdenum disulfide and tungsten disulfide is 0.5~5 μm.

[0013] Furthermore, the cotton fabric is a desized cotton fabric with a count of 60-120 yarns, the impregnation speed is 1-3 meters / min, and the drying temperature is 90-120℃.

[0014] Furthermore, the winding process parameters for the first prepreg are: rolling temperature 90~120℃, rolling pressure 0.1~0.5Mpa; and the winding process parameters for the second prepreg are: rolling temperature 120~150℃, rolling pressure 0.3~0.8Mpa. Furthermore, the curing process parameters for the two types of prepreg fabrics after winding and preforming are as follows: first, heat preservation at 80~100℃ for 1~2 hours, and then heat preservation at 130~150℃ for 4~9 hours.

[0015] The second technical solution proposed in this invention is: a dual-lubricated retainer composite material, which is prepared by the method for preparing the dual-lubricated retainer composite material described in the first technical solution.

[0016] The third technical solution proposed in this invention is a retainer, which is made of the double-lubricated retainer composite material described in the second technical solution.

[0017] The third technical solution proposed in this invention is a bearing, including the cage described in the third technical solution.

[0018] The beneficial effects of this invention are as follows: 1. Based on the preparation of a dual-lubricated cage composite material, this invention prepares a cage that combines both thin oil lubrication and solid lubrication, thereby creating a bearing with dual lubrication function. This dual-lubricated bearing can simultaneously achieve both thin oil lubrication and solid lubrication, solving the shortcomings of the single lubrication method in existing optoelectronic system bearings. When the bearing starts running, the lubricating oil in the cage guide surface material forms an oil film between the cage material and the raceway, avoiding the problem of abnormal noise and vibration caused by friction; as the bearing rotates, the steel balls rub and collide with the solid lubricating material in the cage pockets, transferring the solid lubricating material to the raceway. As the lubricating oil is lost through precipitation, the transferred lubricating film formed by the solid lubricating material acts as a lubrication carrier, achieving a long service life for the bearing.

[0019] 2. In the process of preparing the dual-lubricated retainer composite material, the present invention synthesizes phenolic resin suitable for two lubrication methods and distinguishes the organic solvent dilution amount and winding process parameters for different resins: (1) For thin oil lubrication, it is necessary to impregnate with phenolic resin with a small molecular weight, and the viscosity of the mixed resin should not be too high, the rolling temperature of the winding should not be too high, and the pressure should not be too high, otherwise it is easy to have no foaming or very few bubbles; (2) For solid lubrication, it is necessary to have high material strength, friction reduction and wear resistance. Therefore, the prepared phenolic resin has a large molecular weight, large viscosity, and the rolling temperature and pressure during winding are high.

[0020] 3. This invention directly mixes and impregnates the foaming agent with phenolic resin, reducing the previous two-step process of impregnating the foaming agent first and then the resin to a single step, increasing production efficiency by nearly 30% while reducing the use of organic solvents by 30%, making it more environmentally friendly and protecting the health of operators.

[0021] 4. This invention can effectively improve the friction and wear characteristics of materials by adding solid lubricants, especially porous graphite lubricants treated with dopamine and graphene nanospheres. Detailed Implementation

[0022] The dual-lubricated cage composite material of the present invention is prepared by impregnating cotton cloth with phenolic resin containing a foaming agent and phenolic resin containing a solid lubricant, respectively, followed by roll pressing, winding, sintering, and curing. After the prepared material is used to make a cage and applied to a bearing, the microporous oil-containing portion of the cage provides initial lubrication during the initial start-up phase of the bearing, resulting in low starting friction torque and smooth, noiseless bearing operation. Simultaneously, the solid lubricating portion of the cage gradually forms a lubricating film as the bearing rotates, thereby meeting the long-life, pollution-free lubrication requirements of aerospace optoelectronic system bearings.

[0023] The preparation method of the dual-lubricated retainer composite material of the present invention includes the following four steps: Step 1: Synthesize two types of phenolic resins; Step 2: Prepare the two resins separately according to the proportions; Step 3: Impregnate cotton cloth with the two types of resin respectively; Step 4: Winding and curing to form the shape.

[0024] The present invention will be further described in detail below with reference to the embodiments, but this should not be construed as limiting the invention in any way.

[0025] Example 1 Step 1: Synthesize two types of phenolic resins Phenolic resin A (i.e., low molecular weight phenolic resin): Phenol and formaldehyde were added to a reaction vessel in a 1:1 ratio, followed by ammonia water (1% by mass of phenol, 25% by mass). The mixture was kept at 60°C for 40 min, then at 75°C for 110 min until emulsification and separation, at which point the reaction was stopped. Then, when the reaction vessel temperature dropped to 55°C, vacuum dehydration was performed for 3 h / kg to obtain molecular weight M. w Phenolic resin A is 600 g / mol; Phenolic resin B (i.e., high molecular weight phenolic resin): First, phenol and formaldehyde are added to a reaction vessel in a 1:1 ratio, followed by ammonia water (25% by mass) accounting for 10% of the phenol mass. The reaction is then sequentially heated at 40°C for 60 min, 85°C for 60 min, and 100°C for 18 min, after which the reaction is stopped. Then, when the reaction vessel temperature drops to 70°C, vacuum dehydration is performed for 3.5 h / kg to obtain molecular weight M. w Phenolic resin B is 1500 g / mol.

[0026] Step 2: Prepare the two resins separately according to the specified proportions. Phenolic resin C (i.e. foaming phenolic resin): DPT is fully dissolved in acetone, and urea is fully dissolved in anhydrous ethanol. The two solutions are then mixed evenly with phenolic resin A to obtain phenolic resin C. The amount of DPT used per kilogram of phenolic resin A is 6 g, and the total amount of acetone and ethanol used is 350 ml. The mass ratio of DPT to urea is 1:2. Phenolic resin D (i.e., solid lubricant-modified phenolic resin): Dopamine-treated graphene nanospheres were dispersed evenly in anhydrous ethanol and then added to the prepared phenolic resin B. The mixture was stirred continuously to form a homogeneous solution, thus obtaining phenolic resin D. The amount of graphene nanospheres used per kilogram of phenolic resin B was 5 g, and the amount of anhydrous ethanol used was 300 ml. The particle size of the graphene nanospheres was 10 nm.

[0027] Step 3: Impregnate cotton cloth with the two types of resin respectively. Desized cotton fabric with 120 count yarn was impregnated with phenolic resin C and phenolic resin D on an impregnation machine, and then dried to obtain the first prepreg and the second prepreg; the impregnation speed was 1 meter / min and the drying temperature was 120℃.

[0028] Step 4: Winding and curing molding In this embodiment, the bearing used in the cage is an externally guided type. The two prepreg fabrics obtained in the previous step are wound on a tube winding machine using a hot rolling method: First, under the conditions of rolling temperature of 130°C and rolling pressure of 0.8MPa, the second prepreg fabric impregnated with phenolic resin D is wound; then, under the conditions of rolling temperature of 120°C and rolling pressure of 0.3MPa, the first prepreg fabric impregnated with phenolic resin C is wound on the wound second prepreg fabric.

[0029] The preformed material after winding is sintered and cured in a sintering furnace. The curing process parameters are: first, heat at 80℃ for 2 hours, and then heat at 130℃ for 9 hours.

[0030] Thus, a dual-lubricated cage composite material is obtained. The required cage is then manufactured by machining and assembled onto the corresponding bearing to obtain a bearing that combines primary oil lubrication and solid lubrication.

[0031] Example 2 Step 1: Synthesize two types of phenolic resins Phenolic resin A (i.e., low molecular weight phenolic resin): Phenol and formaldehyde were added to a reactor in a 1:1 ratio, followed by ammonia water (28% by mass) accounting for 10% of the phenol mass. The mixture was kept at 40°C for 60 min, then at 85°C for 40 min until emulsification and separation, at which point the reaction was stopped. Then, when the reactor temperature dropped to 60°C, vacuum dehydration was performed for 1 h / kg to obtain molecular weight M. w Phenolic resin A is 400 g / mol; Phenolic resin B (i.e., high molecular weight phenolic resin): First, phenol and formaldehyde are added to a reaction vessel in a 1:1 ratio, followed by ammonia water (1% by mass of phenol, 28% by mass). The reaction is then sequentially heated at 60°C for 20 min, 65°C for 120 min, and 80°C for 20 min, after which the reaction is stopped. Then, when the reaction vessel temperature drops to 60°C, vacuum dehydration is performed for 2 h / kg to obtain molecular weight M. w The phenolic resin B has a concentration of 1300 g / mol.

[0032] Step 2: Prepare the two resins separately according to the specified proportions. Phenolic resin C (i.e., foaming phenolic resin): Dissolve DPT completely in acetone, then dissolve urea completely in anhydrous ethanol. Mix the two solutions obtained with phenolic resin A to obtain phenolic resin C. The amount of DPT used per kilogram of phenolic resin A is 10 g, the total amount of acetone and ethanol used is 200 ml, and the mass ratio of DPT to urea is 1:3. Phenolic resin D (i.e., solid lubricant-modified phenolic resin): Dopamine-treated porous graphite lubricant and molybdenum disulfide were dispersed evenly in anhydrous ethanol and then added to the prepared phenolic resin B. The mixture was stirred continuously to form a homogeneous solution, thus obtaining phenolic resin D. The amount of porous graphite lubricant, molybdenum disulfide, and anhydrous ethanol per kilogram of phenolic resin B was 70 g, 30 g, and 150 ml, respectively. The specific surface area of ​​the porous graphite lubricant was 10 m² / g. 2 / g, molybdenum disulfide D50 is 0.5μm.

[0033] The solid lubricant is one or more of porous graphite lubricant, graphene nanospheres, molybdenum disulfide, and tungsten disulfide. In this embodiment, the solid lubricant is graphene nanospheres with a particle size of 10 nm.

[0034] Step 3: Impregnate cotton cloth with the two types of resin respectively. Desized cotton fabric with 80-count yarn was impregnated with phenolic resin C and phenolic resin D on an impregnation machine, and then dried to obtain the first prepreg and the second prepreg; the impregnation speed was 3 m / min and the drying temperature was 90℃.

[0035] Step 4: Winding and curing molding In this embodiment, the bearing used in the cage is an internally guided type. The two prepreg fabrics obtained in the previous step are wound on a tube winding machine using a hot rolling method: First, under the conditions of rolling temperature of 90°C and rolling pressure of 0.1MPa, the first prepreg fabric impregnated with phenolic resin C is wound; then, under the conditions of rolling temperature of 120°C and rolling pressure of 0.3MPa, the second prepreg fabric impregnated with phenolic resin D is wound on the wound first prepreg fabric.

[0036] The preformed material after winding is sintered and cured in a sintering furnace. The curing process parameters are: first, heat at 100℃ for 1 hour, and then heat at 150℃ for 4 hours.

[0037] Thus, a dual-lubricated cage material is obtained. The required cage is then machined and assembled onto the corresponding bearing to obtain a bearing that combines primary oil lubrication and solid lubrication.

[0038] Example 3 Step 1: Synthesize two types of phenolic resins Phenolic resin A (i.e., low molecular weight phenolic resin): Phenol and formaldehyde were added to a reaction vessel in a 1:1 ratio, followed by ammonia water (5% by mass of phenol, 26% by mass). The mixture was kept at 60°C for 20 min, then at 65°C for 120 min until emulsification and separation, at which point the reaction was stopped. Then, when the reaction vessel temperature dropped to 50°C, vacuum dehydration was performed for 1 h / kg to obtain molecular weight M. w Phenolic resin A is 550 g / mol; Phenolic resin B (i.e., high molecular weight phenolic resin): First, phenol and formaldehyde are added to a reaction vessel in a 1:1 ratio, followed by ammonia water (3% by mass of phenol, 26% by mass). The reaction is then sequentially heated at 60°C for 40 min, 80°C for 40 min, and 90°C for 5 min, after which the reaction is stopped. Then, when the reaction vessel temperature drops to 50°C, vacuum dehydration is performed for 1.5 h / kg to obtain molecular weight M. w Phenolic resin B is 1000 g / mol.

[0039] Step 2: Prepare the two resins separately according to the specified proportions. Phenolic resin C (i.e., foaming phenolic resin): Dissolve DPT completely in acetone, then dissolve urea completely in anhydrous ethanol. Mix the two solutions obtained with phenolic resin A to obtain phenolic resin C. The amount of DPT used per kilogram of phenolic resin A is 1 g, the total amount of acetone and ethanol used is 400 ml, and the mass ratio of DPT to urea is 1:1. Phenolic resin D (i.e., solid lubricant-modified phenolic resin): Dopamine-treated porous graphite lubricant, graphene nanospheres, and tungsten disulfide were uniformly dispersed in anhydrous ethanol and then added to the prepared phenolic resin B. The mixture was stirred continuously to form a homogeneous solution, thus obtaining phenolic resin D. The amount of porous graphite lubricant, graphene nanospheres, tungsten disulfide, and anhydrous ethanol per kilogram of phenolic resin B was 30g, 10g, 50g, and 200ml, respectively. The specific surface area of ​​the porous graphite lubricant was 6m². 2 / g, the graphene nanospheres have a particle size of 60nm, and the tungsten disulfide D50 is 5μm.

[0040] Step 3: Impregnate cotton cloth with the two types of resin respectively. Desized cotton fabric with 60-count yarn was impregnated with phenolic resin C and phenolic resin D on an impregnation machine, and then dried to obtain the first prepreg and the second prepreg; the impregnation speed was 2 m / min and the drying temperature was 100℃.

[0041] Step 4: Winding and curing molding In this embodiment, the bearing used in the cage is an externally guided type. The two prepreg fabrics obtained in the previous step are wound on a tube winding machine using a hot rolling method: First, under the conditions of rolling temperature of 150°C and rolling pressure of 0.4MPa, the second prepreg fabric impregnated with phenolic resin D is wound; then, under the conditions of rolling temperature of 100°C and rolling pressure of 0.5MPa, the first prepreg fabric impregnated with phenolic resin C is wound on the wound second prepreg fabric.

[0042] The preformed material after winding is sintered and cured in a sintering furnace. The curing process parameters are: first, heat at 90℃ for 1.5 hours, and then heat at 140℃ for 6 hours.

[0043] Thus, a dual-lubricated cage material is obtained. The required cage is then machined and assembled onto the corresponding bearing to obtain a bearing that combines primary oil lubrication and solid lubrication.

[0044] In the above embodiments, the dopamine treatment method for the solid lubricant is as follows: the solid lubricant is reacted in a Tris-HCl (pH=8.5) buffer solution and dopamine hydrochloride environment for 24 h to obtain a dopamine-treated solid lubricant. The solid lubricant is one or more of porous graphite lubricant, graphene nanospheres, molybdenum disulfide, and tungsten disulfide.

[0045] The performance of the double-lubricated cage materials prepared in Examples 1-3 above was tested, and the results are shown in the table below.

[0046] Test results of material properties of dual-lubricated cage The table above shows that: 1. The dual-lubricated cage material prepared by this invention has both high mechanical strength and two lubrication methods: thin oil lubrication and solid lubrication.

[0047] 2. The present invention uses the prepared double-lubricated cage material to make the cage and assembles it on the bearing. The bearing is tested on a bench. The starting friction torque meets the technical requirements, and no vibration or abnormal noise occurs during the test rotation.

[0048] Therefore, the bearing with both lubrication methods proposed in this invention not only meets the needs of aerospace optoelectronic systems, but can also be widely used in machine tool spindles and other fields, meeting the future development needs of my country's aerospace and industrial machine tools, with significant economic and social benefits.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. A method for preparing a dual-lubricated cage composite material, characterized in that: First, cotton cloth is impregnated with foamed phenolic resin and dried to obtain the first prepreg; then, cotton cloth is impregnated with solid lubricating modified phenolic resin and dried to obtain the second prepreg; finally, the two prepregs are wound sequentially on a tube winding machine to preform, with the latter prepreg wound on the former prepreg, and then sintered and cured in a sintering furnace to obtain a double lubricating retainer composite material. The winding sequence for the two types of prepregs is selected according to the bearing guidance method, as follows: if the bearing is externally guided, the second prepreg is wound first, and then the first prepreg is wound; if the bearing is internally guided, the first prepreg is wound first, and then the second prepreg is wound.

2. The method for preparing the dual-lubricated cage composite material according to claim 1, characterized in that: The foaming phenolic resin is composed of low molecular weight phenolic resin, foaming agent, diluent, and foaming aid, and the molecular weight M of the low molecular weight phenolic resin is... w It is 400-600 g / mol.

3. The method for preparing the dual-lubricated cage composite material according to claim 2, characterized in that: The preparation method of the foamed phenolic resin includes: first, adding phenol and formaldehyde into a reaction vessel at a molar ratio of 1:1, then adding ammonia water accounting for 1-10% of the mass of phenol, with a mass fraction of 25-28% for the ammonia water, and keeping the mixture at 40-60℃ for 20-60 min, and then at 65-85℃ for 40-120 min until emulsification and separation, at which point the reaction is stopped; then, when the temperature of the reaction vessel drops to 50-60℃, vacuum dehydration is performed for 1-3 h / kg to obtain the low molecular weight phenolic resin; finally, fully dissolving DPT in acetone, and fully dissolving urea in anhydrous ethanol, and mixing the two solutions with the low molecular weight phenolic resin to obtain the foamed phenolic resin; wherein the amount of DPT used per kilogram of low molecular weight phenolic resin is 1-10 g, the total amount of acetone and ethanol used is 200-400 ml, and the mass ratio of DPT to urea is 1:(1-3).

4. The method for preparing the dual-lubricated cage composite material according to claim 1, characterized in that: The solid lubricant modified phenolic resin is composed of a high molecular weight phenolic resin, a dopamine-treated solid lubricant, and an anhydrous ethanol diluent, and the molecular weight M of the high molecular weight phenolic resin is... w It is 1000-1500 g / mol.

5. The method for preparing the dual-lubricated cage composite material according to claim 4, characterized in that: The preparation method of the solid lubricant modified phenolic resin includes: First, phenol and formaldehyde are added to a reaction vessel at a molar ratio of 1:1, and ammonia water accounting for 1-10% of the mass of phenol is added, with a mass fraction of 25-28% for the ammonia water. The reaction is then carried out at 40-60℃ for 20-60 min, 65-85℃ for 40-120 min, and 80-100℃ for 5-20 min, and the reaction is stopped. Then, when the temperature of the reaction vessel drops to 50-70℃, vacuum dehydration is performed for 1.5-3.5 h / kg to obtain the high molecular weight phenolic resin. Finally, a dopamine-treated solid lubricant is dispersed evenly in anhydrous ethanol and added to the prepared high molecular weight phenolic resin. The mixture is stirred continuously to form a homogeneous solution to obtain the solid lubricant modified phenolic resin. The amount of solid lubricant used per kilogram of high molecular weight phenolic resin is 5-100 g, and the amount of anhydrous ethanol used is 150-300 ml.

6. The method for preparing the dual-lubricated cage composite material according to claim 5, characterized in that: The solid lubricant is one or more of porous graphite lubricant, graphene nanospheres, molybdenum disulfide, and tungsten disulfide, wherein the specific surface area of ​​the porous graphite lubricant is 6-10 m². 2 / g, the particle size of graphene nanospheres is 10~60 nm, and the D50 of molybdenum disulfide and tungsten disulfide is 0.5~5 μm.

7. The method for preparing the dual-lubricated cage composite material according to claim 1, characterized in that: The cotton fabric is a desized cotton fabric with a count of 60-120 yarns, the impregnation speed is 1-3 meters / min, and the drying temperature is 90-120℃.

8. The method for preparing the dual-lubricated cage composite material according to claim 1, characterized in that: The winding process parameters for the first prepreg are: rolling temperature 90~120℃, rolling pressure 0.1~0.5Mpa; the winding process parameters for the second prepreg are: rolling temperature 120~150℃, rolling pressure 0.3~0.8Mpa.

9. The method for preparing the dual-lubricated cage composite material according to claim 1, characterized in that: The curing process parameters for the two types of prepreg fabrics after winding and preforming are as follows: first, keep warm at 80~100℃ for 1~2 hours, and then keep warm at 130~150℃ for 4~9 hours.

10. A dual-lubricated retainer composite material, characterized in that: The material is prepared by the method for preparing the double-lubricated cage composite material according to any one of claims 1-9.

11. A cage, characterized in that: The cage is made of the dual-lubricated cage composite material as described in claim 10.

12. A bearing, characterized in that: The bearing includes the cage as described in claim 11.

Images