A configuration of a magnetic anti-wear lubricating oil suitable for rolling friction pairs and a method of lubricating the same

Abstract

The application discloses a configuration of a magnetic anti-wear lubricating oil suitable for a rolling friction pair and a lubricating method thereof, which comprises the following steps: firstly, configuring a magnetic lubricating oil with a friction-reducing and anti-wear function by taking an oil-soluble magnetic ion solution 1-butyl-3-methyl imidazole tetrachloro ferrate as an additive; then, magnetizing the rolling body along the axial direction of the cylindrical rolling body by using a magnetizing machine; and finally, immersing the magnetic lubricating oil into the contact surface of the rolling friction pair. In the application, the magnetic lubricating oil is more easily adsorbed on the surface of the friction pair under the action of the magnetized friction pair, the local viscosity of the lubricating oil at the surface of the friction pair is improved, the lubricating performance of the lubricating oil is improved, the magnetic ions in the lubricating oil are arranged more closely on the surface of the friction pair due to the existence of the magnetic field of the surface of the friction pair, the strength of the boundary film is improved, and the lubricating oil can bear greater shearing stress.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of configuration of magnetic antiwear lubricating oil and its lubrication method, especially a kind of configuration of magnetic antiwear lubricating oil and its lubrication method suitable for rolling friction pair, belong to lubrication technical field. BACKGROUND

[0002] Mechanical equipment parts will inevitably produce friction in the process of operation, resulting in wear and tear of parts, configuration of improved lubricating oil and good lubrication method is one of the most effective ways to reduce friction and reduce wear.

[0003] With the continuous progress of industrial technology, the performance requirements of lubricating oil are more and more strict. In addition to high strength bearing capacity, good friction reduction and wear resistance, it also needs to show self-repairing ability and environmental adaptability. In this regard, magnetic lubricating oil as a new type of lubricant has good application significance. It can repair the scratches on the friction surface to a certain extent under the action of external magnetic field, and can offset the effect of gravity and centripetal force during lubrication to prevent leakage and environmental pollution. Magnetic lubricating oil is an important material to solve the lubrication and sealing problem of mechanical equipment moving parts under special working conditions. The current magnetic lubricating oil is usually composed of magnetic nanoparticles dispersed in lubricating base fluid to form a magnetic lubricant, but the application conditions and service life of this magnetic lubricant are limited due to thermodynamic instability. Therefore, it is necessary to explore new type of magnetic lubricating material. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a kind of configuration of magnetic antiwear lubricating oil suitable for rolling friction pair and its lubrication method, the purpose is to use an oil-soluble magnetic ion solution as lubricating additive, obtain a kind of magnetic friction reduction and wear resistant lubricating oil with good stability and long service life, and provide a kind of lubrication method using the magnetic lubricating oil and suitable for rolling friction pair. Both can make the magnetic lubricating oil more easily adsorbed on the surface of friction pair under the action of magnetized friction pair, so that the local viscosity of lubricating oil at the surface of friction pair is improved, which improves the lubrication performance of lubricating oil, and the existence of magnetic field on the surface of friction pair can make the magnetic ions in the lubricating oil arrange more closely on the surface of friction pair, improve the strength of boundary film, so that the lubricating oil can withstand greater shear stress. It can also avoid the problems such as agglomeration and sedimentation of nanoparticles in traditional magnetic fluid, can accurately fill the contact surface and realize continuous lubrication, and play the role of friction reduction and wear resistance to the greatest extent.

[0005] The technical solution of the present application is realized as follows:

[0006] A kind of configuration of magnetic antiwear lubricating oil suitable for rolling friction pair and its lubrication method, characterized by comprising the following steps:

[0007] Step one, configure the magnetic lubricating oil with oil-soluble magnetic ion solution as additive: the oil-soluble magnetic ion solution is 1-butyl-3-methyl imidazole tetrachloro ferric acid salt, the adding amount in the lubricating oil is 0.1-5wt%, the magnetic ion solution is completely dispersed in the lubricating oil by the magnetic stirrer, the magnetic lubricating oil is obtained, because of the oil-solubility of 1-butyl-3-methyl imidazole tetrachloro ferric acid salt, the nano particles can be well dispersed in the lubricating oil to avoid the traditional nano magnetic lubricating oil agglomeration and settlement, therefore, the lubricating oil has no special requirements.

[0008] Step two, the rolling body of the rolling friction pair is magnetized, the rolling body provides a magnetic field environment for the lubricating oil: the cylindrical rolling body is directly magnetized by the magnetizing machine, the magnetic field strength of the contact surface of the rolling friction pair is controlled to be 0.01-0.1T, the contact surface magnetic field makes the magnetic lubricating oil more easily adsorbed on the surface of the friction pair under the action of the magnetized friction pair, so that the local viscosity of the lubricating oil on the surface of the friction pair is improved, the magnetic ions in the lubricating oil are arranged more closely on the surface of the friction pair by the magnetic field of the surface of the friction pair, so that the strength of the boundary film is improved, and the lubricating oil can withstand greater shear stress; in the rolling friction pair, the rolling body is rotating, the rolling body is magnetized in the axial direction, because the magnetic field direction of the rolling body magnetized in the axial direction does not change in the rotation, the magnetic ions are more stably fixed on the surface of the friction pair, so that the local viscosity is improved, the lubrication effect is improved, the magnetic field force in the axial direction can also make the magnetic ions arrange more closely, improve the strength of the boundary film, and make it withstand greater shear stress; the rolling friction pair provides a magnetic field environment for the magnetic lubricating oil, improves the performance of the lubricating oil, and has good friction reduction and wear resistance effect;

[0009] Step three, the magnetic lubricating oil obtained in step one is immersed in the contact surface of the rolling friction pair;

[0010] Step four, wear test is carried out, the test is carried out on the online contact friction and wear testing machine, and the wear amount is tested, the wear amount is measured on the white light interference microscope;

[0011] Step five, the friction coefficient test is carried out, the test is carried out on the online contact friction and wear testing machine.

[0012] Compared with the prior art, the advantages of the present application are obvious, mainly in:

[0013] 1. Compared with ordinary lubricating oil, the lubricating oil of this invention can respond under magnetic field conditions. Magnetic lubricating oil is more easily adsorbed onto the surface of the friction pair under the action of a magnetized friction pair, resulting in an increase in local viscosity at the friction pair surface, thus improving the lubricating performance. Furthermore, the presence of the magnetic field on the friction pair surface allows the magnetic ions in the lubricating oil to be more densely packed on the friction pair surface, increasing the strength of the boundary film and enabling the lubricating oil to withstand greater shear stress. Compared with traditional magnetic fluids, the lubricating oil of this invention is thermodynamically more stable and does not suffer from problems such as nanoparticle sedimentation or agglomeration. It can accurately fill the contact surface to achieve continuous lubrication, maximizing friction reduction and wear resistance.

[0014] 2. In this invention, the friction pair is magnetized so that it can provide a magnetic field environment for the magnetic lubricant, thus improving the friction reduction and wear resistance of the magnetic lubricant.

[0015] 3. The lubrication method provided in this invention provides a magnetic field environment for the lubricating oil by magnetizing the rolling friction pair and preparing the magnetic lubricating oil by using an oil-soluble magnetic ion solution as an additive, thereby providing good lubrication conditions for the rolling friction pair and achieving good friction reduction and anti-wear effects. Attached Figure Description

[0016] This invention has a total of appendices Figure 5 Count. Among them:

[0017] Figure 1 This is a schematic diagram of the distribution of magnetic ions on the interface under the magnetic field of the present invention;

[0018] Figure 2 The friction coefficient curves of Example 1, Comparative Example 1, and Comparative Example 2 at different rotational speeds are shown.

[0019] Figure 3 This is a wear depth test diagram from Embodiment 1 of the present invention;

[0020] Figure 4 This is a wear depth test diagram of Comparative Example 1 of the present invention;

[0021] Figure 5 This is a wear depth test diagram for Comparative Example 2 of the present invention. Detailed Implementation

[0022] like Figure 1 , 2 The magnetic anti-wear lubricant for rolling friction pairs, as shown in Figures 3, 4, and 5, is characterized by comprising the following steps:

[0023] Step one, configure the magnetic lubricating oil with oil-soluble magnetic ion solution as additive: the oil-soluble magnetic ion solution is 1-butyl-3-methyl imidazole tetrachloro ferric acid salt, the adding amount in the lubricating oil is 0.1-5wt%, the magnetic ion solution is completely dispersed in the lubricating oil by the magnetic stirrer, the magnetic lubricating oil is obtained, and because of the oil-soluble of 1-butyl-3-methyl imidazole tetrachloro ferric acid salt, the nano particles can be well dispersed in the lubricating oil to avoid the traditional nano magnetic lubricating oil agglomeration and settlement, thus the lubricating oil has no special requirements.

[0024] Step two, the rolling body of the rolling friction pair is magnetized, and the rolling body provides a magnetic field environment for the lubricating oil: the cylindrical rolling body is directly magnetized by a magnetizing machine, the magnetic field strength of the contact surface of the rolling friction pair is controlled to be 0.01-0.1T, the contact surface magnetic field makes the magnetic lubricating oil more easily adsorbed on the surface of the friction pair under the action of the magnetized friction pair, so that the local viscosity of the lubricating oil on the surface of the friction pair is improved, the magnetic ions in the lubricating oil are arranged more closely on the surface of the friction pair under the action of the magnetic field of the surface of the friction pair, so that the strength of the boundary film is improved, and the lubricating oil can withstand greater shear stress; in the rolling friction pair, the rolling body is rotating, the rolling body is magnetized in the axial direction, because the magnetic field direction of the rolling body in the rotation does not change, the magnetic ions are more stably fixed on the surface of the friction pair, so that the local viscosity is improved, the lubricating effect is improved, the magnetic field force in the axial direction can also make the magnetic ions arrange more closely, improve the strength of the boundary film, and make it withstand greater shear stress; the rolling friction pair provides a magnetic field environment for the magnetic lubricating oil, improves the performance of the lubricating oil, and has good friction reducing and wear resisting effect;

[0025] Step three, the magnetic lubricating oil obtained in step one is immersed in the contact surface of the rolling friction pair;

[0026] Step four, wear test is carried out, the test is carried out on an online contact friction and wear testing machine, and the wear amount is tested, and the wear amount is measured on a white light interference microscope;

[0027] Step five, the friction coefficient test is carried out, the test is carried out on an online contact friction and wear testing machine.

[0028] The application discloses a magnetic lubricating oil preparation method of a magnetic ion solution as a lubricating oil additive, and

[0029] Example 1

[0030] Step one, configure the friction-reducing and wear-resistant magnetic lubricating oil with oil-soluble magnetic ion solution as an additive: first, weigh 392 g of CF10W-40 lubricating oil with a precision electronic balance and place it in a beaker; then weigh 8 g of 1-butyl-3-methylimidazolium tetrachloroferrate with a content of 98% with a precision electronic balance and add it to the beaker containing the CF10W-40 lubricating oil to obtain a mixed solution A; place the obtained mixed liquid A on a magnetic stirrer and stir at a speed of 360 rpm / min for 20 min; after standing for 10 min, place the liquid on a magnetic stirrer and stir at a speed of 360 rpm / min for 20 min to obtain a magnetic liquid B;

[0031] Step two, provide a magnetic field environment for the rolling friction pair, and the magnetic field direction is provided along the axial direction of the cylindrical rolling body: the magnetic field is directly magnetized to the cylindrical rolling body by a magnetizing machine, and the magnetic field strength of the contact surface of the rolling friction pair is controlled to be 0.1 T. The existence of the contact surface magnetic field force has two effects, one is that the magnetic lubricating oil is more easily adsorbed on the surface of the friction pair under the action of the magnetized friction pair, so that the local viscosity of the lubricating oil at the surface of the friction pair is improved, which improves the lubricating performance of the lubricating oil, and the other is that the existence of the magnetic field on the surface of the friction pair can make the magnetic ions in the lubricating oil arrange more closely on the surface of the friction pair, which improves the strength of the boundary film and makes the lubricating oil can withstand greater shear stress. Since the rolling body in the rolling friction pair is constantly rotating, the magnetization direction of the rolling body is more suitable for the axial direction, because the magnetic field in the radial direction changes constantly in the contact surface magnetic field force direction when the rolling body rotates, so that the magnetic ions cannot be stably fixed on the surface of the friction pair, while the magnetic length direction of the rolling body magnetized in the axial direction does not change in the rotation, which can make the magnetic ions more stably fixed on the surface of the friction pair, so that the local viscosity is improved, the lubricating effect is improved, and the axial magnetic field force can also make the magnetic ions arrange more closely, improve the strength of the boundary film, and make it can withstand greater shear stress;

[0032] Step three, immerse the magnetic liquid B obtained in step one in the contact surface of the friction pair: the friction pair is composed of a cylindrical rolling body and a metal block, and the two together constitute a line contact rolling friction pair, and the rolling body is made of ferromagnetic material alloy steel;

[0033] Step four, perform a wear amount test on a line contact friction and wear testing machine: the lower test piece is a metal block with a width of 15 mm, and the upper test piece is a cylindrical rolling body magnetized in step 3 with a radius of 35 mm. During the test, the load is 1800 N, the rotating speed is 0.4 m / s, the test temperature is 35℃, and the test time is 150 min. After the test, the wear depth is measured by a white light interferometer, and the measurement result is the average value of three tests, and the test result is shown in Figure 3

[0034] ​Step five, friction coefficient test was carried out on the online contact friction and wear tester: the lower test piece was a metal block with a width of 15 mm, and the upper test piece was the cylindrical roller after magnetization in step 3, with a radius of 35 mm. During the test, the load was 1800N, the test temperature was 35℃, the test speed range was 0.2m / s-1.0m / s, and the friction coefficient was recorded by the sensor on the test bench. The measurement result was the average value within 5 minutes.

[0035] Comparative example 1

[0036] Step one, CF10W-40 lubricating oil was placed in a beaker for comparison test;

[0037] Step two, the CF10W-40 lubricating oil of step 1 was arranged on the surface of the online contact friction pair: the friction pair was composed of two parts, the rolling body and the metal block, which together formed a linear contact rolling friction pair. The cylindrical roller was made of ferromagnetic material alloy steel;

[0038] Step three, wear test was carried out on the online contact friction and wear tester: the lower test piece was a metal block with a width of 15 mm, and the upper test piece was a cylindrical rolling body without magnetization, with a radius of 35 mm. During the test, the load was 1800N, the rotating speed was 0.4m / s, the test temperature was 35℃, and the test time was 150min. After the test, the wear depth was measured by white light interferometer, and the measurement result was the average value of three tests. The test result is shown in Figure 4

[0039] Step four, friction coefficient test was carried out on the online contact friction and wear tester: the lower test piece was a metal block with a width of 15 mm, and the upper test piece was a cylindrical rolling body without magnetization, with a radius of 35 mm. During the test, the load was 1800N, the test temperature was 35℃, the test speed range was 0.2m / s-1.0m / s, and the friction coefficient was recorded by the sensor on the test bench. The measurement result was the average value within 5 minutes.

[0040] Comparative example 2

[0041] Step one, prepare the friction-reducing and wear-resistant magnetic lubricating oil with oil-soluble magnetic ion solution as additive: first, weigh 392g of CF10W-40 lubricating oil with a precision electronic balance and place it in a beaker; then weigh 8g of 1-butyl-3-methylimidazolium tetrachloroferrate with a content of 98% and add it to the beaker containing CF10W-40 lubricating oil to obtain a mixed solution A; place the obtained mixed liquid A on a magnetic stirrer and stir at a speed of 360rpm / min for 20min; after standing for 10min, place the liquid on the magnetic stirrer again and stir at a speed of 360rpm / min for 20min to obtain magnetic liquid B; ​

[0042] Step two, the magnetic liquid B obtained in step 1 is arranged on the surface of a linear contact friction pair: the friction pair is composed of a cylindrical rolling body and a metal block, and the two together constitute a linear contact rolling friction pair, and the cylindrical roller is made of ferromagnetic material alloy steel;

[0043] Step three, wear test is carried out on a linear contact friction and wear testing machine: the lower test piece is a metal block with a width of 15 mm, and the upper test piece is a rolling body without magnetization treatment, with a radius of 35 mm. During the test, the load is 1800N, the rotating speed is 0.4m / s, the test temperature is 35℃, and the test time is 150min. After the test, the wear depth is measured by a white light interferometer, and the measurement result is the average value of three tests. The test result is shown in Table 1. Figure 5

[0044] Step four, friction coefficient test is carried out on a linear contact friction and wear testing machine: the lower test piece is a metal block with a width of 15 mm, and the upper test piece is a cylindrical roller without magnetization treatment, with a radius of 35 mm. During the test, the load is 1800N, the test temperature is 35℃, the test speed range is 0.2m / s-1.0m / s, and the friction coefficient is recorded by a sensor on the test bench. The measurement result is the average value within 5min.​

Claims

1. A lubrication method for a magnetic anti-wear lubricating oil suitable for rolling friction pairs, characterized in that, Includes the following steps: Step 1: Prepare a friction-reducing and anti-wear magnetic lubricating oil with an oil-soluble magnetic ionic solution as an additive: The oil-soluble magnetic ionic solution is 1-butyl-3-methylimidazolium tetrachloroferrate, and the amount added to the lubricating oil is 0.1-5 wt%. The magnetic ionic solution is completely dispersed in the lubricating oil using a magnetic stirrer to obtain the magnetic lubricating oil; Step 2: Magnetize the rolling elements of the rolling friction pair to provide a magnetic field environment for the lubricating oil: The cylindrical rolling elements are directly magnetized by a magnetizer, and the magnetic field strength of the contact surface of the rolling friction pair is controlled to be 0.01-0.1T. Step 3: Immerse the contact surfaces of the rolling friction pair in the magnetic lubricating oil obtained in Step 1; Step 4: Conduct a wear test on a line contact friction and wear tester and measure the wear amount using a white light interference microscope. Step 5: Conduct friction coefficient testing on an online contact friction and wear testing machine.

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