CN112923226A - Micro-fluidic technology-based micro-oil drop supply system and auxiliary lubrication method thereof - Google Patents
Micro-fluidic technology-based micro-oil drop supply system and auxiliary lubrication method thereof Download PDFInfo
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- CN112923226A CN112923226A CN202110170023.7A CN202110170023A CN112923226A CN 112923226 A CN112923226 A CN 112923226A CN 202110170023 A CN202110170023 A CN 202110170023A CN 112923226 A CN112923226 A CN 112923226A
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- 238000005461 lubrication Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000010687 lubricating oil Substances 0.000 claims abstract description 37
- 230000001050 lubricating effect Effects 0.000 claims abstract description 14
- 235000019198 oils Nutrition 0.000 claims description 57
- 239000012530 fluid Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000010775 animal oil Substances 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- -1 methyl orthosilicate silane Chemical compound 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960003237 betaine Drugs 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N37/00—Equipment for transferring lubricant from one container to another
- F16N37/003—Equipment for transferring lubricant from one container to another for filling bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
- F16N15/04—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions with water
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention belongs to the technical field of water-lubricated sliding bearings, and particularly relates to a micro-oil drop supply system based on a micro-fluidic technology and an auxiliary lubrication method thereof, wherein the micro-oil drop supply system supplies micro-lubricating oil drops to the water-lubricated bearing; when the water-lubricated bearing meets severe working conditions suddenly, the micro-oil drop supply system takes a water phase as a continuous phase and an oil phase as a dispersed phase, and micro-oil drops are formed in the water phase by utilizing a micro-fluidic technology and flow into a contact area along with water through an oil filling hole to generate an oil film to replace a fragile water film; lubricating oil is intermittently supplied to the bearing in a trace and discrete form, so that the lubricating performance of the water-lubricated bearing under an abnormal working condition is enhanced, the frictional wear of the water-lubricated bearing is reduced, and the service time of the water-lubricated bearing is prolonged; short oil supply time, low oil consumption, little environmental pollution and wide market prospect.
Description
The technical field is as follows:
the invention belongs to the technical field of water-lubricated sliding bearings, and particularly relates to a micro-oil drop supply system based on a micro-fluidic technology and an auxiliary lubricating method thereof.
Background art:
the sliding bearing in the ship propulsion system adopts lubricating oil as a lubricating medium, so that the lubricating oil is easy to leak, pollution is caused, and the ecological environment is seriously damaged.
In recent years, with the enhancement of environmental awareness and the improvement of environmental legislation, water-lubricated bearings using water as a lubricant, which is free of pollution and low in cost, have been the focus of controversy in various countries. However, the viscosity of water is low, the film forming capability is poor, and a plurality of problems still exist in the service of the water lubrication bearing. The non-uniform load of the bearing generated by the arrangement of the cantilever of the propeller, the low-speed running of the start and stop stages of the bearing, the short-time impact of the external load and the like can cause the rupture of a water film between the friction pairs, so that the abrasion failure of the bearing is caused. The above conditions can also cause bearing ringing noise, affect ship concealment, reduce the acting distance of the ship-borne sonar and the resisting capacity of the ship, and also affect the riding comfort of the ship. Therefore, how to solve the problems is the key point in the research field of the water lubrication bearing.
As a lubricating medium, the performance of lubricating oils is far superior to that of water, and the amount of liquid lubricant actually required for lubrication is very small. A very small amount of liquid lubricant is added to the water and enters the contact zone, and it should be possible to significantly improve the performance of the water-lubricated bearing.
Microfluidics, an emerging subject and technology in recent years, utilizes microchannels (with dimensions of tens to hundreds of micrometers) to process or manipulate tiny fluids, and one of the important features is that the tiny fluids have unique fluid properties such as laminar flow and liquid droplets in a micro-scale environment. Through the design of the micro-channel and the control of the flow velocity of the fluid, the shear force, the viscous force and the surface tension are utilized to generate the velocity difference, so that the fluid flow is divided into micro-droplets.
The inventor makes lubricating oil form oil drops in water by means of a micro-fluidic technology, applies the oil drops to auxiliary lubrication of the water-lubricated bearing, and when the water-lubricated bearing meets severe working conditions suddenly, a trace amount of lubricating oil is injected into a contact area intermittently at a certain speed in a micro-oil drop mode to regulate and control the tribological performance of the water-lubricated bearing, so that the bearing capacity of the water-lubricated bearing is improved, the frictional wear of the water-lubricated bearing is reduced, and the purpose of temporary risk avoidance is achieved.
The invention content is as follows:
the invention aims to provide a micro-oil drop supply system based on a micro-fluidic technology and an auxiliary lubricating method thereof, aiming at the defects in the prior art.
In order to achieve the purpose, the invention provides an auxiliary lubricating method of a micro-oil drop supply system based on a micro-fluidic technology, which comprises the following specific steps:
s1, arranging an oil filling hole on a bearing lining of the water lubricated bearing, and extending a micro-fluidic channel of a micro-oil drop supply system into the oil filling hole;
s2, under the condition of pure water lubrication, monitoring the axle center track of the water-lubricated bearing by using a water-lubricated bearing axle center track detection device, inputting the measured signal into an industrial personal computer measurement and control and data processing system, and recording, storing and analyzing in time, so as to obtain a real-time curve of the axle center track and realize the measurement of the axle center track;
s3, when the water lubricated bearing meets harsh working conditions suddenly, namely the detected axle center track is irregular in shape, and a phenomenon that a large ring is sleeved with a small ring is started, the lubrication state of the water lubricated bearing is changed into mixed lubrication, and at the moment, the micro oil drop supply system is started; the micro-oil drop supply system takes a water phase as a continuous phase and an oil phase as a dispersed phase, and forms micro-oil drops in the water phase by utilizing a micro-fluidic technology, wherein the micro-oil drops flow into a contact area of the water lubricated bearing along with water flowing through the oil filling hole to generate an oil film to replace a fragile water film, so that the bearing capacity of the water lubricated bearing is improved, and the tribological performance of the water lubricated bearing under severe working conditions is improved;
and S4, when the axle center track of the water-lubricated bearing is restored to be elliptical and is restored to be close to the geometric center, the water-lubricated bearing reaches a fluid dynamic pressure lubrication state, the supply of trace lubricating oil is not needed any more, and the micro-oil drop supply system stops working according to the feedback of the axle center track detection device of the water-lubricated bearing.
Furthermore, the micro-oil drop supply system adopts a T-shaped micro-fluidic channel to shear the oil phase into micro-oil drops, the T-shaped micro-fluidic channel comprises a vertical tube and a horizontal tube, the vertical tube is vertically intersected with the horizontal tube, and one end of the vertical tube, which is close to the horizontal tube, is in a conical contraction shape; the vertical tube is filled with oil phase, and the horizontal tube is filled with water phase; and the pipelines connected with the T-shaped microfluidic channels are all microfluidic channels.
Furthermore, the T-shaped micro-fluidic channel and the micro-fluidic channel are both subjected to super oleophobic treatment.
Further, the oil filling hole in the step (1) is arranged at a position, close to the contact area, of the bearing liner, a threaded hole is formed in a bearing seat of the water lubricated bearing and communicated with the oil filling hole, a micro-fluidic channel of the micro-oil drop supply system extends into the oil filling hole through the threaded hole, and the tail end of the micro-fluidic channel is flush with an inner side port of the oil filling hole.
Furthermore, the water-lubricated bearing axle center track detection device adopts a commercially available eddy current displacement sensor, and the lubricating oil adopted by the trace lubricating oil supply system adopts commercially available environment-friendly animal oil or vegetable oil.
The invention also provides a micro-oil drop supply system based on the micro-fluidic technology, which comprises a main body structure and a micro-fluidic channel, wherein the main body structure comprises a lubricating oil supply system, a water supply system and the T-shaped micro-fluidic channel; the water supply system is connected with the inlet end of the horizontal pipe of the T-shaped micro-fluidic channel through the micro-fluidic channel, and the outlet end of the horizontal pipe of the T-shaped micro-fluidic channel is connected with the oil filling hole of the water lubricating bearing through the micro-fluidic channel.
Compared with the prior art, the invention has the advantages that:
1. by the aid of the auxiliary lubricating system supplied with trace lubricating oil, when the water-lubricated bearing meets severe working conditions suddenly, lubricating oil is intermittently supplied to the bearing in a trace and discrete mode, so that the lubricating performance of the water-lubricated bearing under abnormal working conditions is enhanced, the frictional wear of the water-lubricated bearing is reduced, and the service time of the water-lubricated bearing is prolonged;
2. the micro-fluidic technology is beneficial to the formation of micro-oil drops, the defect that continuous oil supply cannot accurately control the oil supply amount is avoided, a better auxiliary lubricating effect can be achieved by using a smaller amount of lubricating oil, and the using amount of the lubricating oil is reduced; the micro-fluidic channel directly extends to the contact area, so that the influence of the countercurrent of water and the pressure of the contact area on the entering of micro-oil drops into the contact area can be reduced, lubricating oil can enter the contact area more easily to participate in lubrication, and the stress concentration of a water-lubricated bearing system cannot be increased due to the tiny size of the micro-fluidic channel;
3. the oil inlet of the T-shaped microfluidic channel is designed to be contracted, so that lubricating oil is easier to be cut by water flow to form oil drops, and meanwhile, in order to prevent the oil drops from adhering to the microfluidic channel in a non-static working environment, the inner surface of the microfluidic channel is subjected to super-oleophobic treatment, so that the lubricating oil always exists in the form of the oil drops in the microfluidic channel;
4. because the micro-lubricating oil auxiliary lubrication is carried out only when the water-lubricated bearing meets the harsh working condition suddenly, the oil supply time is short, the oil consumption is low, the environmental-friendly lubricating oil has little pollution to the environment, the auxiliary lubrication system has simple structure and low manufacturing cost, and has wide market prospect.
Description of the drawings:
fig. 1 is a schematic view of the structural principle of a micro-oil droplet supply system according to embodiment 1 of the present invention.
FIG. 2 is a diagram of the axial trace of the water lubricated bearing of embodiment 1 according to the present invention when encountering severe conditions.
FIG. 3 is a schematic diagram of the principle of lubricating oil drop formation and the modification of the superoleophobic thin film on the inner surface of the pipeline according to the microfluidic technology.
Fig. 4 is a Stribeck graph relating to the present invention.
The specific implementation mode is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
The embodiment relates to a micro-oil drop supply system based on a micro-fluidic technology, which supplies micro-oil drops to a water-lubricated bearing; the main structure of the micro oil drop supply system comprises a water tank 1, a water pump 2, a one-way throttle valve 3, a micro oil supply pump 4, an unloading valve 5 and a T-shaped micro flow control channel 6, wherein the water tank 1 is connected with the water pump 2 through the micro flow control channel; the inlet end of the one-way throttle valve 3 is connected with the water pump 2 through a first micro-fluidic channel 7, and the outlet end of the one-way throttle valve 3 is connected with the inlet end of a horizontal tube of the T-shaped micro-fluidic channel 6 through a second micro-fluidic channel 14; the inlet end of a vertical tube of the T-shaped micro-fluidic channel 6 is connected with the micro-oil supply pump 4 through a third micro-fluidic channel 15, the outlet end of a horizontal tube of the T-shaped micro-fluidic channel 6 is connected with a fourth micro-fluidic channel 16, the fourth micro-fluidic channel 16 enters a groove 11 between the bearing seat 8 and the bearing lining 9 through a threaded hole 10 of the water lubrication bearing and extends into the oil filling hole 13, and the tail end of the fourth micro-fluidic channel 16 is flush with the end opening of the inner side of the oil filling hole 13; the unloading valve 5 is connected with the micro oil supply pump 4 through a micro-fluidic channel; the main structure of the water lubrication bearing comprises a bearing seat 8, a bearing lining 9, a threaded hole 10, a groove 11, a rotating shaft 12 and an oil filling hole 13; a threaded hole 10 is formed in the bearing seat 8, and a bearing lining 9 with a hollow cylindrical structure is arranged in the bearing seat 8; an oil filling hole 13 is formed in the bearing lining 9 near the contact area, the oil filling hole 13 is of a cylindrical structure, one end of the oil filling hole 13 is communicated with the groove 11, and the other end of the oil filling hole extends into the bearing lining 9; a groove 11 is circumferentially arranged between the bearing seat 8 and the bearing lining 9, one end of the groove 11 is communicated with the threaded hole 10, the other end of the groove 11 is communicated with the oil filling hole 13, and the length of the groove is the distance between the threaded hole 10 and the oil filling hole 13 on the shorter side; the shaft 12 is mounted in the bearing liner 9, and the shaft 12 is rotatable relative to the bearing liner 9.
The inner surfaces of the first micro-fluidic channel 7, the second micro-fluidic channel 14, the third micro-fluidic channel 15, the fourth micro-fluidic channel 16 and the T-shaped micro-fluidic channel 6 are all subjected to superoleophobic treatment, and the method specifically comprises the following steps: at room temperature, 5g of alkoxysilane functionalized betaine zwitterionic compound is dissolved in 95g of alcohol solvent (solution A), 5g of nano-silica with the size of 100nm is mixed with 95g of methanol solvent to prepare solution B, 15g of solution A, 5g of solution B, 0.5g of isopropanol diluent, 0.1g of water and 5g of methyl orthosilicate silane adhesive are mixed and uniformly stirred, the first microfluidic channel 7, the second microfluidic channel 14, the third microfluidic channel 15, the fourth microfluidic channel 16 and the T-shaped microfluidic channel 6 are soaked in the mixed solution and treated at 80 ℃ for 100min to obtain a superoleophobic inner surface (as shown in figure 3), so that lubricating oil sheared by water flow in the T-shaped microfluidic channel 6 can always exist in the form of oil drops.
The micro-fluidic channel between the water tank 1 and the water pump 2, the micro-fluidic channel between the unloading valve 5 and the micro-oil supply pump 4, the first micro-fluidic channel 7, the second micro-fluidic channel 14, the third micro-fluidic channel 15, the fourth micro-fluidic channel 16 and the T-shaped micro-fluidic channel 6 are all commercially available and made of polytetrafluoroethylene, and the diameter of the pipeline is tens to hundreds of micrometers.
The T-shaped microfluidic channel 6 comprises a vertical pipe and a horizontal pipe, wherein the vertical pipe is vertically intersected with the horizontal pipe, one end, close to the horizontal pipe, of the vertical pipe is in a conical contraction shape, namely the diameter of the pipeline is reduced from large to small when lubricating oil flows to the horizontal pipe from the vertical pipe, and the diameter of the pipeline when the lubricating oil enters the horizontal pipe is minimum, so that the lubricating oil is easier to be sheared by water flow.
Further, the diameters of the first micro-fluidic channel 7, the second micro-fluidic channel 14, the third micro-fluidic channel 15, the fourth micro-fluidic channel 16, the micro-fluidic channel between the water tank 1 and the water pump 2, the micro-fluidic channel between the unloading valve 5 and the micro-oil supply pump 4, and the vertical tube and the horizontal tube of the T-shaped micro-fluidic channel 6 are the same, the diameter of the groove 11 of the water lubrication bearing is slightly larger than that of the fourth micro-fluidic channel 16, and the diameter of the groove 11 can enable the fourth micro-fluidic channel 16 to penetrate through the groove and can fix the fourth micro-fluidic channel 16. In order to better highlight the structure of the T-shaped microfluidic channel 6 and the groove 11, fig. 1 is enlarged.
The auxiliary lubrication method of the micro-oil drop supply system based on the micro-fluidic technology comprises the following steps:
s1, according to a classical Stribeck curve, when a water-lubricated bearing meets severe working conditions suddenly, a water film in the bearing is broken, the lubrication state between bearing friction pairs is changed from hydrodynamic lubrication to mixed lubrication, even boundary lubrication, and serious abrasion failure of the water-lubricated bearing is caused, on the basis, the axle center track in different lubrication states is monitored, and when the axle center track is located in an ellipse with a long short axis and a small short axis near a geometric center, and the repeatability is good, the water-lubricated bearing is in a hydrodynamic lubrication state; when the axle center track is irregular in shape and begins to generate a phenomenon that a large ring is sleeved with a small ring (as shown in figure 2), the lubrication state of the water-lubricated bearing begins to be converted into mixed lubrication;
s2, under the condition of pure water lubrication, the water-lubricated bearing is positioned in a water environment, the axle center track of the water-lubricated bearing is monitored by using an eddy current displacement sensor, and a measured signal is input to a measurement and control and data processing system of an industrial personal computer for timely recording, storing and analyzing, so that a real-time curve of the axle center track is obtained, and the axle center track is measured;
s3, when the water-lubricated bearing suddenly meets harsh working conditions such as low-speed running in a start-stop stage, short-time impact of an external load and other variable loads or variable speeds, the micro-oil drop supply system firstly starts to work according to the feedback of the track change of the axle center of the water-lubricated bearing, the water pump 2 presses water in the water tank 1 into the T-shaped micro-fluidic channel 6 through the one-way throttle valve 3 at a pressure greater than the pressure of the ambient water in the water-lubricated bearing and flows into the fourth micro-fluidic channel 15 embedded between the bearing lining 9 and the bearing seat 8; after the water flow in the fourth microfluidic channel 15 is stable, the micro oil supply pump 4 starts to work, the micro oil supply pump 4 presses the lubricating oil into the third microfluidic channel 15 at a certain fluidity, the flow rate of the lubricating oil is related to the application structure of a specific water lubricated bearing and can be adjusted according to specific conditions, after the micro lubricating oil reaches the T-shaped microfluidic channel 6, tiny oil drops are formed due to the existence of a contraction port and water shearing force and flow into the fourth microfluidic channel 16 along with the water flow, the lubricating oil drops in the fourth microfluidic channel 16 enter a contact area through the oil filling hole 13 to generate an oil film to replace a fragile water film, the bearing capacity of the water lubricated bearing is improved, and the tribological performance of the water lubricated bearing in a harsh working condition is improved;
s4, when the track of the bearing center of the bearing returns to an ellipse and returns to the position near the geometric center again, the water-lubricated bearing reaches a fluid dynamic pressure lubrication state, the supply of trace lubricating oil is not needed any more, the micro oil drop supply system feeds back according to the eddy current displacement sensor, the unloading valve 5 unloads the micro oil supply pump 4, and the micro oil drop supply system stops working.
Further, the lubricating oil adopted by the micro-oil drop supply system is selected from commercially available environment-friendly animal oil or vegetable oil.
Claims (6)
1. An auxiliary lubrication method of a micro-oil drop supply system based on a micro-fluidic technology is characterized by comprising the following specific steps:
s1, arranging an oil filling hole on a bearing lining of the water lubricated bearing, and extending a micro-fluidic channel of a micro-oil drop supply system into the oil filling hole;
s2, under the condition of pure water lubrication, monitoring the axle center track of the water-lubricated bearing by using a water-lubricated bearing axle center track detection device, inputting the measured signal into an industrial personal computer measurement and control and data processing system, and recording, storing and analyzing in time, so as to obtain a real-time curve of the axle center track and realize the measurement of the axle center track;
s3, when the water lubricated bearing meets harsh working conditions suddenly, namely the detected axle center track is irregular in shape, and a phenomenon that a large ring is sleeved with a small ring is started, the lubrication state of the water lubricated bearing is changed into mixed lubrication, and at the moment, the micro oil drop supply system is started; the micro-oil drop supply system takes a water phase as a continuous phase and an oil phase as a dispersed phase, and forms micro-oil drops in the water phase by utilizing a micro-fluidic technology, wherein the micro-oil drops flow into a contact area of the water lubricated bearing along with water flowing through the oil filling hole to generate an oil film to replace a fragile water film, so that the bearing capacity of the water lubricated bearing is improved, and the tribological performance of the water lubricated bearing under severe working conditions is improved;
and S4, when the axle center track of the water-lubricated bearing is restored to be elliptical and is restored to be close to the geometric center, the water-lubricated bearing reaches a fluid dynamic pressure lubrication state, the supply of trace lubricating oil is not needed any more, and the micro-oil drop supply system stops working according to the feedback of the axle center track detection device of the water-lubricated bearing.
2. The method for assisting in lubricating a micro-oil drop supply system based on a microfluidic technology according to claim 1, wherein the micro-oil drop supply system shears an oil phase into micro-oil drops by using a T-shaped microfluidic channel, the T-shaped microfluidic channel comprises a vertical tube and a horizontal tube, the vertical tube is vertically intersected with the horizontal tube, and one end of the vertical tube, which is close to the horizontal tube, is in a conical contraction shape; the vertical tube is filled with oil phase, and the horizontal tube is filled with water phase; and the pipelines connected with the T-shaped microfluidic channels are all microfluidic channels.
3. The method for assisting in lubricating a micro-oil drop supply system based on a microfluidic technology as claimed in claim 2, wherein the T-shaped microfluidic channel and the microfluidic channel are both superoleophobic.
4. The auxiliary lubrication method for the micro-oil drop supply system based on the micro-fluidic technology as claimed in claim 1, wherein the oil filling hole in step (1) is arranged at a position close to the contact area of the bearing liner, a threaded hole is formed in a bearing seat of the water lubricated bearing, the threaded hole is communicated with the oil filling hole, the micro-fluidic channel of the micro-oil drop supply system extends into the oil filling hole through the threaded hole, and the tail end of the micro-fluidic channel is flush with the inner side port of the oil filling hole.
5. The auxiliary lubrication method for the micro-oil drop supply system based on the microfluidic technology as claimed in claim 1, wherein the trace detection device of the axle center of the water-lubricated bearing is an eddy current displacement sensor, and the lubricating oil adopted by the micro-oil drop supply system is commercially available environment-friendly animal oil or vegetable oil.
6. The method for assisting in lubricating a micro-drop supply system based on a microfluidic technology according to claim 1, wherein the main structure of the micro-drop supply system comprises a lubricating oil supply system, a water supply system and a T-shaped microfluidic channel, and the lubricating oil supply system is connected with the inlet end of the vertical tube of the T-shaped microfluidic channel through the microfluidic channel; the water supply system is connected with the inlet end of the horizontal pipe of the T-shaped micro-fluidic channel through the micro-fluidic channel, and the outlet end of the horizontal pipe of the T-shaped micro-fluidic channel is connected with the oil filling hole of the water lubricating bearing through the micro-fluidic channel.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170023.7A CN112923226B (en) | 2021-02-08 | 2021-02-08 | Micro-fluidic technology-based micro-oil drop supply system and auxiliary lubrication method thereof |
| JP2022554226A JP7466232B2 (en) | 2021-02-08 | 2021-11-04 | Micro-oil droplet supply system based on microfluidics technology and auxiliary lubrication method thereof |
| PCT/CN2021/128539 WO2022166285A1 (en) | 2021-02-08 | 2021-11-04 | Microfluidic control technique-based oil droplet supply system and auxiliary lubrication method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110170023.7A CN112923226B (en) | 2021-02-08 | 2021-02-08 | Micro-fluidic technology-based micro-oil drop supply system and auxiliary lubrication method thereof |
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| CN112923226A true CN112923226A (en) | 2021-06-08 |
| CN112923226B CN112923226B (en) | 2022-02-01 |
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| JP (1) | JP7466232B2 (en) |
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| WO (1) | WO2022166285A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166285A1 (en) * | 2021-02-08 | 2022-08-11 | 青岛理工大学 | Microfluidic control technique-based oil droplet supply system and auxiliary lubrication method therefor |
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| CN115475668B (en) * | 2022-08-22 | 2023-07-07 | 湖北师范大学 | Device and method for synthesizing morphology-controllable nano silver |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2023517213A (en) | 2023-04-24 |
| CN112923226B (en) | 2022-02-01 |
| WO2022166285A1 (en) | 2022-08-11 |
| JP7466232B2 (en) | 2024-04-12 |
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