Preparation method for efficient bearing self-lubricating

Abstract

The invention discloses a preparation method of a high-efficiency bearing self-lubricating material. The preparation method comprises the following steps: S1, preparing a PTFE (Polytetrafluoroethylene) self-lubricating composite material; s2, preparation of a bearing: manufacturing the bearing by taking the PTFE self-lubricating composite material as a raw material, and preparing the bearing to a required size; s3, pretreatment of the liner; and S4, mounting the PTFE / aramid fiber composite woven liner. According to the efficient bearing self-lubricating preparation method, the friction and abrasion performance of the bearing can be effectively improved through the installed gasket, the friction factor and the abrasion loss of the bearing can be reduced along with the increase of swing comments, and the treated PTFE / aramid fiber composite woven gasket has the advantages of being low in cost, high in practicability and the like. The PTFE composite material has the advantages of low friction coefficient, low limit damage and low environmental pollution, and the bearing prepared from the PTFE composite material has the characteristics of low friction coefficient, wear resistance, good impact resistance and high limit PV value, and can work at high temperature.

Description

Technical Field

[0001] This invention relates to the field of bearings, and in particular to a method for preparing a high-efficiency self-lubricating bearing. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.

[0003] The main failure mode of bearings is wear. In addition, the gaskets may fall off due to poor adhesion, resulting in the loss of self-lubricating function. Existing gaskets have poor wettability and poor bonding force, which will affect the service life of the bearing. Summary of the Invention

[0004] The main objective of this invention is to provide a method for preparing a high-efficiency self-lubricating bearing, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing a high-efficiency self-lubricating bearing includes the following steps:

[0007] S1: Preparation of PTFE self-lubricating composite material: The PTFE self-lubricating composite material includes formulations one to four, where formulation one includes PTFE and carbon fiber, with PTFE:carbon fiber ratio of (90-70):(10-30); formulation two includes PTFE, PAB fiber, and graphite carbon, with PTFE:fiber:graphite carbon ratio of (87-67):8:(5-25); formulation three includes PTFE, PAB fiber, and polystyrene, with PTFE:fiber:polystyrene ratio of (87-67):8:(5-25); formulation four includes PTFE, PAB fiber, and nano-ZnO, with PTFE:fiber:polystyrene ratio of (84-80):8:(1-5), and includes the following preparation steps:

[0008] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0009] B: Pressing of mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the cavity of the mold. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0010] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature includes, but is not limited to, a temperature of 370 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 40 degrees Celsius / t; a temperature of 375 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 30 degrees Celsius / t; and a temperature of 385 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 40 degrees Celsius / t.

[0011] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0012] S3: Pretreatment of the gasket: including the following steps:

[0013] 1. Prepare PTFE / aramid fiber composite woven pads, ethanol solution, phosphate coupling agent, and dry in an oven;

[0014] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0015] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it.

[0016] Preferably, in step B, the material should be added to the cavity of a mold in one go.

[0017] Preferably, in step C, the temperature is maintained for 120 minutes when the temperature rises from room temperature to 320°C, and then maintained for 120 minutes after the temperature drops from the sintering temperature to 320°C.

[0018] Preferably, in step S3, the PTFE-rich side of the PTFE / aramid fiber composite woven liner is the friction surface, and the aramid fiber-rich side is the adhesive surface.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention, through the installation of a PTFE / aramid fiber composite woven gasket, effectively improves the friction and wear performance of the bearing. The bearing's friction coefficient and wear decrease with increasing oscillation frequency, while the frictional temperature rise increases with increasing oscillation frequency. Furthermore, the treated PTFE / aramid fiber composite woven gasket effectively improves its physical adhesion, enhancing the tightness of the installation. This treatment method is cost-effective, causes minimal damage to the bearing's positioning system, and minimizes environmental pollution. Bearings made from PTFE composite materials exhibit a low coefficient of friction, excellent wear resistance, and good impact resistance, along with a high limiting PV value, allowing them to operate at high temperatures. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention relates to a method for preparing a high-efficiency self-lubricating bearing, comprising the following steps:

[0023] S1: Preparation of PTFE self-lubricating composite material: The PTFE self-lubricating composite material includes formulations one to four, where formulation one includes PTFE and carbon fiber, with PTFE:carbon fiber ratio of (90-70):(10-30); formulation two includes PTFE, PAB fiber, and graphite carbon, with PTFE:fiber:graphite carbon ratio of (87-67):8:(5-25); formulation three includes PTFE, PAB fiber, and polystyrene, with PTFE:fiber:polystyrene ratio of (87-67):8:(5-25); formulation four includes PTFE, PAB fiber, and nano-ZnO, with PTFE:fiber:polystyrene ratio of (84-80):8:(1-5), and includes the following preparation steps:

[0024] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0025] B: Pressing of the mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the mold cavity. The amount of material should be added to the mold cavity at one time. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0026] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature includes, but is not limited to, rising from room temperature to 320°C at a heating rate of 40°C / t, with a sintering temperature of 370°C; rising from room temperature to 320°C at a heating rate of 30°C / t, with a sintering temperature of 375°C; rising from room temperature to 320°C at a heating rate of 40°C / t, with a sintering temperature of 385°C. When rising from room temperature to 320°C, the temperature is held for 120 minutes, and when the sintering temperature is reduced to 320°C, the temperature is held for 120 minutes.

[0027] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0028] S3: Pretreatment of the gasket: including the following steps:

[0029] 1. Prepare PTFE / aramid fiber composite woven liner, ethanol solution, phosphate ester coupling agent, and dry in an oven. The side of the PTFE / aramid fiber composite woven liner rich in PTFE is the friction surface, and the side rich in aramid fiber is the bonding surface.

[0030] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0031] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it. Specific Implementation Example 1:

[0033] A method for preparing a high-efficiency self-lubricating bearing includes the following steps:

[0034] S1: Preparation of PTFE self-lubricating composite material: The formulation of the PTFE self-lubricating composite material is PTFE and carbon fiber, wherein the ratio of PTFE to carbon fiber is (90-70):(10-30), and includes the following preparation steps:

[0035] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0036] B: Pressing of the mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the mold cavity. The amount of material should be added to the mold cavity at one time. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0037] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature is increased from room temperature to 320℃ at a rate of 40℃ / t. The sintering temperature is 370℃. When the temperature is increased from room temperature to 320℃, it is held for 120 minutes. When the temperature is decreased from the sintering temperature to 320℃, it is held for 120 minutes.

[0038] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0039] S3: Pretreatment of the gasket: including the following steps:

[0040] 1. Prepare PTFE / aramid fiber composite woven liner, ethanol solution, phosphate ester coupling agent, and dry in an oven. The side of the PTFE / aramid fiber composite woven liner rich in PTFE is the friction surface, and the side rich in aramid fiber is the bonding surface.

[0041] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0042] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it. Specific Implementation Example 2:

[0044] A method for preparing a high-efficiency self-lubricating bearing includes the following steps:

[0045] S1: Preparation of PTFE self-lubricating composite material: The formulation of the PTFE self-lubricating composite material includes PTFE, PAB fiber and graphite carbon, wherein the ratio of PTFE:fiber:graphite carbon is (87-67):8:(5-25), and includes the following preparation steps:

[0046] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0047] B: Pressing of the mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the mold cavity. The amount of material should be added to the mold cavity at one time. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0048] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature is 375 degrees Celsius. The temperature is increased from room temperature to 320°C at a rate of 30°C / t. The temperature is held for 120 minutes when the temperature is increased from room temperature to 320°C. The temperature is then held for 120 minutes when the temperature is decreased from the sintering temperature to 320°C.

[0049] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0050] S3: Pretreatment of the gasket: including the following steps:

[0051] 1. Prepare PTFE / aramid fiber composite woven liner, ethanol solution, phosphate ester coupling agent, and dry in an oven. The side of the PTFE / aramid fiber composite woven liner rich in PTFE is the friction surface, and the side rich in aramid fiber is the bonding surface.

[0052] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0053] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it. Specific Implementation Example 3:

[0055] A method for preparing a high-efficiency self-lubricating bearing includes the following steps:

[0056] S1: Preparation of PTFE self-lubricating composite material: The formulation of the PTFE self-lubricating composite material includes PTFE, PAB fiber and polystyrene, wherein the ratio of PTFE:fiber:polystyrene is (87-67):8:(5-25), and includes the following preparation steps:

[0057] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0058] B: Pressing of the mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the mold cavity. The amount of material should be added to the mold cavity at one time. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0059] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature is 375 degrees Celsius. The temperature is increased from room temperature to 320°C at a rate of 30°C / t. The temperature is held for 120 minutes when the temperature is increased from room temperature to 320°C. The temperature is then held for 120 minutes when the temperature is decreased from the sintering temperature to 320°C.

[0060] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0061] S3: Pretreatment of the gasket: including the following steps:

[0062] 1. Prepare PTFE / aramid fiber composite woven liner, ethanol solution, phosphate ester coupling agent, and dry in an oven. The side of the PTFE / aramid fiber composite woven liner rich in PTFE is the friction surface, and the side rich in aramid fiber is the bonding surface.

[0063] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0064] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it. Specific Implementation Example 4:

[0066] A method for preparing a high-efficiency self-lubricating bearing includes the following steps:

[0067] S1: Preparation of PTFE self-lubricating composite material: The formulation of the PTFE self-lubricating composite material includes PTFE, PAB fiber and nano ZnO, wherein the ratio of PTFE:fiber:polyphenylene ester is (84-80):8:(1-5), and includes the following preparation steps:

[0068] A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use.

[0069] B: Pressing of the mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the mold cavity. The amount of material should be added to the mold cavity at one time. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing.

[0070] C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature is raised from room temperature to 320℃ at a rate of 40℃ / t. The sintering temperature is 385℃. The temperature is held for 120 minutes when the temperature rises from room temperature to 320℃, and then held for 120 minutes when the temperature drops from 320℃.

[0071] S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions;

[0072] S3: Pretreatment of the gasket: including the following steps:

[0073] 1. Prepare PTFE / aramid fiber composite woven liner, ethanol solution, phosphate ester coupling agent, and dry in an oven. The side of the PTFE / aramid fiber composite woven liner rich in PTFE is the friction surface, and the side rich in aramid fiber is the bonding surface.

[0074] 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use.

[0075] S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it.

[0076] The performance of the bearings in Specific Embodiments 1 to 4 is compared with that of the bearings in the prior art. Specific Embodiments 1 to 4 are referred to as Embodiments 1-4, and the bearings in the prior art are referred to as Comparative Example 1. The comparison table is as follows:

[0077]

[0078] This demonstrates that the bearing is assembled with higher precision.

[0079] This invention, through the installation of a PTFE / aramid fiber composite woven gasket, effectively improves the friction and wear performance of the bearing. The bearing's friction coefficient and wear decrease with increasing oscillation frequency, while the frictional temperature rise increases with increasing oscillation frequency. Furthermore, the treated PTFE / aramid fiber composite woven gasket effectively improves its physical adhesion, enhancing the tightness of the installation. This treatment method is cost-effective, causes minimal damage to the bearing's positioning system, and minimizes environmental pollution. Bearings made from PTFE composite materials exhibit a low coefficient of friction, excellent wear resistance, and good impact resistance, along with a high limiting PV value, allowing them to operate at high temperatures.

[0080] Although embodiments of the 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a high-efficiency self-lubricating bearing, characterized in that: The following steps are included: S1: Preparation of PTFE self-lubricating composite material: The PTFE self-lubricating composite material includes formulations one to four, where formulation one includes PTFE and carbon fiber, with PTFE:carbon fiber ratio of (90-70):(10-30); formulation two includes PTFE, PAB fiber, and graphite carbon, with PTFE:fiber:graphite carbon ratio of (87-67):8:(5-25); formulation three includes PTFE, PAB fiber, and polystyrene, with PTFE:fiber:polystyrene ratio of (87-67):8:(5-25); formulation four includes PTFE, PAB fiber, and nano-ZnO, with PTFE:fiber:polystyrene ratio of (84-80):8:(1-5), and includes the following preparation steps: A: Raw material blending: Add the raw materials for the formula to the mixer and blend them. The mixing speed is 6000 r / min and the mixing time is 15 min. After blending, sinter the mixture at a temperature of 385℃ for 10 min. After sintering, the mixed powder is ready and set aside for later use. B: Pressing of mixed powder: Take out the mixed powder and place it into the mold. Use a scraper to smooth it out so that it is evenly distributed in the cavity of the mold. After the material is added, cover the upper mold and then slowly pressurize it to avoid impact pressurization. During the pressurization process, perform secondary depressurization and air release to allow the air trapped in the mixed powder to escape in time. When the pressure reaches 80 MPa, hold the pressure for 10 minutes to make the pressure transmission uniform. Then slowly release the pressure and push the preform out of the mold cavity. Then put it into a high-temperature sintering furnace and sinter it according to a certain sintering process to complete the pressing. C: Sintering treatment: The pressed material is placed in a sintering furnace and sintered freely in the air. The sintering temperature includes, but is not limited to, a temperature of 370 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 40 degrees Celsius / t; a temperature of 375 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 30 degrees Celsius / t; and a temperature of 385 degrees Celsius when the temperature rises from room temperature to 320 degrees Celsius at a rate of 40 degrees Celsius / t. S2: Bearing fabrication: PTFE self-lubricating composite material is used as raw material to manufacture bearings, and the bearings are fabricated to the required dimensions; S3: Pretreatment of the gasket: including the following steps:

1. Prepare PTFE / aramid fiber composite woven pads, ethanol solution, phosphate coupling agent, and dry in an oven; 2. Add 1% phosphate coupling agent to a 10% water ethanol solution and stir until homogeneous to complete the preparation of the modified solution. Soak the PTFE / aramid fiber composite woven liner in the prepared modified solution for 1 hour, and then dry it in an oven at 80℃ for 4 hours. After drying, take it out for use. S4: Installation of PTFE / aramid fiber composite braided gasket: Adhere the PTFE / aramid fiber composite braided gasket to the inner ball surface of the bearing outer ring with adhesive. After installation, place the bearing in an oven and cure it at 100℃ for 4-8 hours. After curing, remove it.

2. The preparation method of a high-efficiency bearing self-lubricating agent according to claim 1, characterized in that: In step B, the material should be added to the cavity of a mold in one go.

3. The preparation method of a high-efficiency bearing self-lubricating agent according to claim 1, characterized in that: In step C, the temperature is maintained for 120 minutes when the temperature rises from room temperature to 320°C, and then maintained for 120 minutes after the temperature drops from the sintering temperature to 320°C.

4. The preparation method of a high-efficiency bearing self-lubricating agent according to claim 1, characterized in that: In step S3, the PTFE-rich side of the PTFE / aramid fiber composite woven liner is the friction surface, and the aramid fiber-rich side is the adhesive surface.

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