CN114704552A - Current-carrying solid film lubrication bearing and friction control method thereof - Google Patents

Current-carrying solid film lubrication bearing and friction control method thereof Download PDF

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Publication number
CN114704552A
CN114704552A CN202210328037.1A CN202210328037A CN114704552A CN 114704552 A CN114704552 A CN 114704552A CN 202210328037 A CN202210328037 A CN 202210328037A CN 114704552 A CN114704552 A CN 114704552A
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current
carrying solid
solid film
bearing
conductive film
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CN202210328037.1A
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CN114704552B (en
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刁东风
薛沛东
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Shenzhen University
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Shenzhen University
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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/32—Balls
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • F16C2202/32—Conductivity
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/50—Lubricating properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a current-carrying solid film lubrication bearing and a friction force control method thereof. The invention replaces the grease injected into the grease lubricated bearing in the prior art by the conductive film layer to realize the lubrication in the current-carrying solid film lubricated bearing; because the conductive film layer is different from grease and has good conductivity, the conductive film layer is arranged on at least one contact surface in the current-carrying solid film lubrication bearing, so that the conductive film layer isolates two adjacent members, and the charge accumulation on the contact surface of the conductive film layer is avoided, the breakdown phenomenon of the two members indirectly contacted through the conductive film layer in the current-carrying solid film lubrication bearing is avoided, and the damage occurrence rate of the surface of the current-carrying solid film lubrication bearing member is effectively reduced.

Description

Current-carrying solid film lubrication bearing and friction control method thereof
Technical Field
The invention relates to the technical field of current-carrying solid film lubricated bearings, in particular to a current-carrying solid film lubricated bearing and a friction control method thereof.
Background
With the rapid development of electric vehicles and high-speed rails, the phenomenon of friction and wear under current-carrying conditions has become a problem which needs to be considered in various transmission parts. Especially for the grease lubricated bearing in the electric vehicle, because the grease lubricated bearing works under the working condition of a complex electric field, charges are easily accumulated at the grease in the grease lubricated bearing, and a breakdown phenomenon occurs along with the accumulation of the charges, so that the performance of the lubricating grease is reduced, and meanwhile, the surface of each component of the grease lubricated bearing is damaged.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention is directed to a current-carrying solid film lubricated bearing and a method for controlling friction thereof, which aims to reduce the occurrence of breakdown on the surface of a bearing member due to charge accumulation.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a current-carrying solid film lubricated bearing wherein at least one contact surface of the current-carrying solid film lubricated bearing is provided with a conductive film layer.
The current-carrying solid film lubrication bearing comprises an inner ring, an outer ring and a plurality of rollers, wherein the inner ring and the outer ring are sleeved with each other, and the rollers are arranged between the inner ring and the outer ring.
The current-carrying solid film lubrication bearing is characterized in that the outer surface of the inner ring and the inner surface of the outer ring are both provided with the conductive film layers.
The current-carrying solid film lubricated bearing, wherein the conductive film layer is arranged on the surface of the roller.
The current-carrying solid film lubrication bearing is characterized in that the surface of the roller, the outer surface of the inner ring and the inner surface of the outer ring are provided with the conductive film layers.
The current-carrying solid film lubrication bearing further comprises a first power supply, and a first end of the first power supply is electrically connected with the outer ring; when the roller is assembled with the inner ring through the transmission shaft, the second end of the first power supply is electrically connected with the transmission shaft, so that a closed-loop current loop is formed among the first power supply, the outer ring, the roller, the inner ring and the transmission shaft.
The current-carrying solid film lubrication bearing comprises a shaft neck, a bearing bush and a bearing seat which are sequentially sleeved from inside to outside; the surface of the shaft neck and/or the surface of the bearing bush are/is provided with the conductive film layer.
The current-carrying solid film lubrication bearing also comprises a second power supply, and one end of the second power supply is electrically connected with the bearing seat; when the shaft journal is assembled through the transmission shaft, the second end of the second power supply is electrically connected with the transmission shaft, so that a closed-loop current loop is formed among the second power supply, the bearing seat, the bearing bush and the shaft journal.
A friction control method based on the current-carrying solid film lubrication bearing comprises the following steps:
sleeving the current-carrying solid film lubricating bearing on a transmission shaft;
electrically connecting a first end of a first power supply with the outer ring, and electrically connecting a second end of the first power supply with the transmission shaft;
and turning on the power supply and driving the transmission shaft to rotate.
Has the advantages that: the invention replaces the grease injected into the grease lubricated bearing in the prior art by the conductive film layer to realize the lubrication in the current-carrying solid film lubricated bearing; because the conductive film layer is different from grease and has good conductivity, the conductive film layer is arranged on at least one contact surface in the current-carrying solid film lubrication bearing, so that the conductive film layer isolates two adjacent members, and the charge accumulation on the contact surface of the conductive film layer is avoided, the breakdown phenomenon of the two members indirectly contacted through the conductive film layer in the current-carrying solid film lubrication bearing is avoided, and the damage occurrence rate of the surface of the current-carrying solid film lubrication bearing member is effectively reduced.
Drawings
FIG. 1 is a schematic view of the current-carrying solid film lubricated bearing of the present invention having a conductive film layer only on the surface of the roller;
FIG. 2 is a schematic structural diagram of the current-carrying solid film lubrication bearing of the present invention when the outer surface of the inner ring and the inner surface of the outer ring have conductive film layers;
FIG. 3 is a schematic structural diagram of the current-carrying solid film lubricated bearing of the present invention when the outer surface of the inner race, the surface of the roller, and the inner surface of the outer race have conductive film layers;
FIG. 4 is a schematic view of a current-carrying solid film lubricated bearing according to a second embodiment of the present invention;
FIG. 5 is a control curve of current versus friction in the current carrying solid film lubricated bearing of the present invention;
FIG. 6 is a control curve of current versus friction stability in the current carrying solid film lubricated bearing in accordance with the present invention when not energized;
FIG. 7 is a control curve of current versus friction stability in the current carrying solid film lubricated bearing when energized in accordance with the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention provides a current-carrying solid film lubrication bearing, as shown in figures 1-3, wherein at least one contact surface of the current-carrying solid film lubrication bearing is provided with a conductive film layer 1. The invention replaces the grease injected into the grease lubricated bearing in the prior art by the conductive film layer 1 to realize the lubrication in the current-carrying solid film lubricated bearing; because electrically conductive rete 1 is different from the grease, and it has good electric conductivity, through set up in the current-carrying solid film lubrication bearing on at least one contact surface electrically conductive rete 1 makes electrically conductive rete 1 keeps apart two adjacent components, avoids having simultaneously charge accumulation on the contact surface of electrically conductive rete 1, and then avoids in the current-carrying solid film lubrication bearing through two components of the indirect contact of electrically conductive rete 1 produce the breakdown phenomenon, effectively reduce the damage incidence on current-carrying solid film lubrication bearing member surface.
The conductive film layer 1 is a solid film prepared by uniformly depositing on at least one contact surface in the current-carrying solid film lubricated bearing through a coating device, and two components adjacent to the conductive film layer 1 in the current-carrying solid film lubricated bearing are ensured not to be in direct contact with each other, but are isolated by the conductive film layer 1 so as to be in indirect contact with each other through the conductive film layer 1.
In a specific embodiment of the present invention, the conductive film layer 1 is a carbon film layer. It should be noted that the present invention is not limited to the use of a carbon film layer to separate direct contact between the components of the current-carrying solid thin film lubricated bearing, and any film that can be electrically conductive and can be deposited on the surface of the components of the current-carrying solid thin film lubricated bearing can be used as the conductive film layer 1 for lubrication and electrical conduction in the present invention.
In a first embodiment of the present invention, as shown in fig. 1, fig. 2, and fig. 3, the current-carrying solid film lubrication bearing includes an inner ring 2, an outer ring 3, and a plurality of rollers 4 disposed between the inner ring 2 and the outer ring 3, that is, the current-carrying solid film lubrication bearing is a rolling bearing.
The first embodiment of the present invention
As shown in fig. 1, the surface of the roller 4 is provided with the conductive film layer 1, so that the roller 4 is isolated from the inner ring 2 by the conductive film layer 1, and the roller 4 is isolated from the outer ring 3 by the conductive film layer 1. Through the conductivity of the contact surface between the roller 4 and the inner ring 2 is improved by the conductive film layer 1, and the conductivity of the contact surface between the roller 4 and the outer ring 3 is improved at the same time, so that the accumulation of charges between the inner ring 2 and the roller 4 and the accumulation of charges between the roller 4 and the inner ring 2 are avoided, and the damage of the contact surface between the roller 4 and the inner ring 2 and the damage of the contact surface between the roller 4 and the outer ring 3 caused by the breakdown phenomenon are avoided.
Second embodiment of the present example
As shown in fig. 2, the conductive film layer 1 is disposed on both the outer surface of the inner ring 2 and the inner surface of the outer ring 3, so that the inner ring 2 is isolated from the rollers 4 by the conductive film layer 1, and the outer ring 3 is isolated from the rollers 4 by the conductive film layer 1. Through conductive film 1 promotes roller 4 with the contact surface between the inner circle 2, and roller 4 with the electric conductivity of contact surface between the outer lane 3, avoid electric charge to be in roller 4 with between the inner circle 2, and roller 4 with accumulate between the outer lane 3, thereby avoid roller 4 with contact surface between the inner circle 2, and roller 4 with contact surface causes the damage because of the breakdown phenomenon between the outer lane 3, effectively reduce current-carrying solid film lubrication bearing produces the incidence of breakdown phenomenon.
Further, all surfaces of the inner ring 2 and all surfaces of the outer ring 3 may be provided with the conductive film layer 1.
Third embodiment of the present example
As shown in fig. 3, the conductive film layer 1 is disposed on the outer surface of the inner ring 2, the surface of the roller 4, and the inner surface of the outer ring 3, so that the contact between the inner ring 2 and the roller 4 is the contact between the conductive film layer 1 and the conductive film layer 1, and the contact between the roller 4 and the outer ring 3 is also the contact between the conductive film layer 1 and the conductive film layer 1. The conductivity of the contact surface between the inner ring 2 and the roller 4 is improved through the conductive film layer 1, and the conductivity of the contact surface between the roller 4 and the outer ring 3 is improved at the same time, so that the accumulation of charges between the inner ring 2 and the roller 4 and the accumulation of charges between the roller 4 and the inner ring 2 are avoided, and the damage of the outer surface of the inner ring 2, the surface of the roller 4 and the inner surface of the outer ring 3 is avoided.
Further, all surfaces of the inner ring 2, the rollers 4, and the outer ring 3 may be provided with the conductive film layer 1.
For the current-carrying solid film lubrication bearing of the present embodiment, as shown in fig. 3, a transmission shaft 8 is assembled with the inner ring 2, that is, the transmission shaft 8 is inserted into a central hole of the inner ring 2, and the transmission shaft 8 is installed in cooperation with an inner surface of the inner ring 2, so that when the transmission shaft 8 rotates, the inner ring 2 and the roller 4 can be driven to rotate. The current-carrying solid film lubricated bearing further comprises a first power supply 9; the first power source 9 is electrically connected to the transmission shaft 8 and the outer ring 3, respectively, and a closed-loop current loop is formed among the first power source 9, the outer ring 3, the rollers 4, the outer ring 3 and the transmission shaft 8.
The outer ring 3 is fixed, the first power supply 9 is turned on while the transmission shaft 8 is rotated, the transmission shaft 8 drives the current-carrying solid film lubrication bearing to operate (the outer ring 3 is static, the inner ring 2 and the rollers 4 rotate, namely, the outer ring 3 is a fixed part, and the inner ring 2 and the rollers 4 are rotating parts), and current-carrying control of the current-carrying solid film lubrication bearing can be realized. By changing the current of the first power supply 9, the friction force of the current-carrying solid film lubrication bearing can be regulated and controlled under different current intensities. In the invention, through the current loop, the friction force of the contact surface between the rotating part and the fixed part in the running process of the current-carrying solid film lubrication bearing can be obviously reduced.
Based on any one of the current-carrying solid film lubrication bearings, the invention also provides a friction control method, which specifically comprises the following steps:
s100, sleeving a current-carrying solid film lubrication bearing on a transmission shaft;
s200, electrically connecting a first end of a first power supply with the outer ring and electrically connecting a second end of the first power supply with the transmission shaft so as to form a closed-loop current loop among the first power supply, the transmission shaft, the inner ring, the roller and the outer ring;
s300, starting a first power supply and driving a transmission shaft to rotate, enabling the current-carrying solid film lubrication bearing to operate, and adjusting the output current of the first power supply, so that the friction control adjustment of the current-carrying solid film lubrication bearing can be realized.
Further, the friction force test process of the current-carrying solid film lubrication bearing is as follows:
connecting an outer ring 3 of the current-carrying solid film lubrication bearing with a tension measuring device so that the friction torque between a roller 4 and the outer ring 3 is balanced with the torque of acting force between the tension measuring device and the outer ring;
the tension measuring device is connected with the outer ring 3, when the transmission shaft 8 rotates to drive the inner ring 2 and the rollers 4 to rotate, the rollers 4 generate a first acting force on the outer ring 3, the tension measuring device generates a second acting force on the outer ring 3, and the moment of the first acting force is balanced with the moment of the second acting force, so that the outer ring 3 is positioned by the tension measuring device. Specifically, a connecting line between a connecting point of the tension measuring device and the outer ring 3 and a central point of the roller 4 is perpendicular to a central axis of the transmission shaft 8, so that the outer ring 3 keeps a static state under the positioning action of the tension measuring device, and a friction torque generated by mutual friction between the roller 4 and the outer ring 3 is balanced with a torque generated by the tension measuring device. By reading the reading of the tension measuring device, the magnitude F of the acting force borne by the outer ring 3 when the roller 4 rotates relative to the outer ring 3 can be obtained. In one embodiment, the tension measuring device is a tension sensor.
Specifically, the first power supply 9 is turned on to increase an electric field between the roller 4 and the outer ring 3; the transmission shaft 8 is driven to rotate, so that the transmission shaft drives the inner ring 2 and the rollers 4 to rotate, and the outer ring 3 keeps a static state under the positioning action of the tension measuring device.
Obtaining a reading of the tension measuring device; calculating the friction force between the roller and the outer ring according to the reading and the distance from the connecting point of the outer ring and the tension measuring device to the central axis of the transmission shaft;
specifically, the moment arm generated by the tension measuring device is obtained by measuring the distance L from the connecting point between the tension measuring device and the outer ring 3 to the central axis of the transmission shaft; according to the moment, namely the force arm, and the reading F of the tension measuring device, the moment generated by the tension measuring device can be obtained, and then the friction moment generated by the contact surface of the conductive film layer 1 between the roller 4 and the outer ring 3 is obtained, so that the following calculation is carried out: when the roller 4 rotates relative to the outer ring 3, the magnitude of a friction force F 'generated at a contact surface of the conductive film layer 1 between the roller 4 and the outer ring 3 (F ═ L ═ F' × L ', where L' is a radius of the roller 4).
Test example one, as shown in fig. 5, fig. 5 shows a control curve of current versus friction in the current-carrying solid film lubricated bearing; in the figure, the abscissa represents time(s) and the ordinate represents friction (N). In the testing process, the outer ring 3 is connected with the tension measuring device, so that the outer ring 3 is kept still, the first power supply 9 is started, the transmission shaft is rotated, and the friction force of the contact surface of the conductive film layer 1 between the roller 4 and the outer ring 3 is tested. When the current supplied by the first power source 9 is 4A and the rotation speed of the transmission shaft is 200rpm, the friction force drops from 0.07N to 0.05N on average at the moment of turning on the first power source 9, and the average friction force is seen to drop by 28%.
Second test example, as shown in fig. 6, fig. 6 shows a control curve of the friction stability in the current-carrying solid film lubrication bearing under the condition of no power supply; in the figure, the abscissa is time (min), the ordinate is friction (N), and the overall test time is 4 hours. It can be seen that during the 4-hour friction process when the power is not supplied and the rotation speed of the transmission shaft is 300rpm, the friction force of the current-carrying solid film lubrication bearing gradually increases, and some unstable sudden jumps occur.
Third test example, as shown in fig. 7, fig. 7 shows a control curve of current to the stability of the friction force in the current-carrying solid film lubrication bearing under the condition of power-on, wherein the abscissa of the graph is time (min), the ordinate is the friction force (N), and the overall test time is 4 hours. It can be seen that the friction force (100 in the figure) of the current-carrying solid film lubricated bearing of the present invention is maintained at a low and stable value during 4 hours of friction when the current is supplied by the first power source 9 and the rotation speed of the transmission shaft is 300 rpm; in contrast, in the case of a non-lubricated bearing (200 in the drawing) lubricated without grease and without the conductive film layer 1, the sudden jump of the frictional force occurs only 20 minutes when the current is applied, and the non-lubricated bearing fails.
In a second embodiment of the present invention, as shown in fig. 4, the current-carrying solid film lubrication bearing includes a journal 5, a bearing bush 6, and a bearing seat 7, which are sequentially sleeved from inside to outside, that is, the current-carrying solid film lubrication bearing is a sliding bearing.
The first embodiment of the present invention
The outer surface of the shaft neck 5 is provided with the conductive film layer 1, so that the shaft neck 5 and the bearing bush 6 are isolated by the conductive film layer 1. The conductivity of the contact surface between the journal 5 and the bearing bush 6 is improved through the conductive film layer 1, and the accumulation of charges between the journal 5 and the bearing bush 6 is avoided, so that the damage of the contact surface between the journal 5 and the bearing bush 6 due to the breakdown phenomenon is avoided, and the occurrence rate of the breakdown phenomenon caused by the charge accumulation in the current-carrying solid film lubrication bearing is effectively reduced.
Second embodiment of the present example
The inner surface of the bearing shell 6 is provided with the conductive film layer 1, so that the shaft neck 5 and the bearing shell 6 are isolated by the conductive film layer 1. The conductivity of the contact surface between the journal 5 and the bearing bush 6 is improved through the conductive film layer 1, and the accumulation of charges between the journal 5 and the bearing bush 6 is avoided, so that the damage of the contact surface between the journal 5 and the bearing bush 6 due to the breakdown phenomenon is avoided, and the occurrence rate of the breakdown phenomenon caused by the charge accumulation in the current-carrying solid film lubrication bearing is effectively reduced.
Third embodiment of the present example
As shown in fig. 4, the outer surface of the journal 5 and the outer surface of the bearing shell 6 are both provided with the conductive film layer 1, so that the contact between the journal 5 and the bearing shell 6 is the contact between the conductive film layer 1 and the conductive film layer 1. The conductivity of the contact surface between the journal 5 and the bearing bush 6 is improved by the conductive film layer 1, so that the accumulation of electric charges between the journal 5 and the bearing bush 6 is avoided, and the damage to the outer surface of the journal 5 and the inner surface of the bearing bush 6 is avoided.
For the current-carrying solid film lubrication bearing of the present embodiment, as shown in fig. 4, a transmission shaft 11 is assembled with the journal 5, that is, the transmission shaft 11 is inserted into a central hole of the journal 5, and the transmission shaft 11 is installed in cooperation with an inner surface of the journal 5, so that when the transmission shaft 11 rotates, the journal 5 can be driven to rotate. The current-carrying solid film lubricated bearing further comprises a second power supply 10; the second power source 10 is electrically connected to the transmission shaft 11 and the bearing seat 7, respectively, and a closed-loop current loop is formed among the second power source 10, the bearing seat 7, the bearing bush 6, the journal 5 and the transmission shaft.
The bearing seat 7 is fixed, the second power supply 10 is turned on while the transmission shaft 11 is rotated, the transmission shaft 11 drives the current-carrying solid film lubrication bearing to operate (the bearing bush 6 is static, the journal 5 rotates, namely, the bearing bush 6 is a fixed part, and the journal 5 is a rotating part), and current-carrying control of the current-carrying solid film lubrication bearing can be realized. By changing the current of the second power supply 10, the friction force of the current-carrying solid film lubrication bearing can be regulated and controlled under different current intensities. In the invention, by forming a current loop, the friction force of the contact surface between the rotating part and the fixed part in the running process of the current-carrying solid film lubrication bearing can be obviously reduced, and the working stability of the current-carrying solid film lubrication bearing is improved.
In summary, the invention provides a current-carrying solid film lubricated bearing and a friction control method thereof, wherein the current-carrying solid film lubricated bearing is lubricated by replacing grease injected into the grease lubricated bearing in the prior art with a conductive film layer; because the conductive film layer is different from grease, and has good conductivity, through set up between arbitrary two contact surfaces in the current-carrying solid film lubricated bearing the conductive film layer avoids charge accumulation between each contact surface in the current-carrying solid film lubricated bearing, thereby avoids the current-carrying solid film lubricated bearing is because of the damage that the breakdown phenomenon caused under complicated electric field environment.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (9)

1. A current-carrying solid film lubricated bearing is characterized in that at least one contact surface in the current-carrying solid film lubricated bearing is provided with a conductive film layer.
2. The current-carrying solid film lubricated bearing according to claim 1, comprising an inner ring and an outer ring nested within each other, and a plurality of rollers disposed between said inner ring and said outer ring.
3. The current-carrying solid film lubricated bearing according to claim 2, wherein the outer surface of the inner race and the inner surface of the outer race are each provided with the conductive film layer.
4. The current-carrying solid film lubricated bearing according to claim 2, wherein the surface of the roller is provided with the conductive film layer.
5. The current-carrying solid film lubricated bearing according to claim 2, wherein the surfaces of the rollers, the outer surface of the inner race, and the inner surface of the outer race are each provided with the conductive film layer.
6. The current-carrying solid film lubricated bearing according to claim 2, further comprising a first power source, a first end of the first power source being electrically connected to the outer race; when the roller is assembled with the inner ring through the transmission shaft, the second end of the first power supply is electrically connected with the transmission shaft, so that a closed-loop current loop is formed among the first power supply, the outer ring, the roller, the inner ring and the transmission shaft.
7. The current-carrying solid film lubricated bearing according to claim 1, comprising a journal, a bearing shell and a bearing seat which are sleeved in sequence from inside to outside; the surface of the shaft neck and/or the surface of the bearing bush are/is provided with the conductive film layer.
8. The current-carrying solid film lubricated bearing according to claim 7, further comprising a second power source, one end of said second power source being electrically connected to said bearing housing; when the shaft journal is assembled through the transmission shaft, the second end of the second power supply is electrically connected with the transmission shaft, so that a closed-loop current loop is formed among the second power supply, the bearing seat, the bearing bush and the shaft journal.
9. A method of controlling friction in a fluid-carrying solid film lubricated bearing according to claim 6, comprising the steps of:
sleeving the current-carrying solid film lubricating bearing on a transmission shaft;
electrically connecting a first end of a first power supply with the outer ring, and electrically connecting a second end of the first power supply with the transmission shaft;
and turning on the power supply and driving the transmission shaft to rotate.
CN202210328037.1A 2022-03-30 2022-03-30 Current-carrying solid film lubrication bearing and friction control method thereof Active CN114704552B (en)

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CN111963568A (en) * 2019-05-20 2020-11-20 斯凯孚公司 Electrically conductive and self-lubricating bearing bushing, bearing comprising same and method of manufacturing same
CN112145548A (en) * 2020-08-31 2020-12-29 清华大学 Self-powered rolling bearing, bearing assembly and rotary machine
CN113513534A (en) * 2021-05-24 2021-10-19 浙江大学 Conductive rolling bearing with nickel-graphite conductive coating and preparation method

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CN111963568A (en) * 2019-05-20 2020-11-20 斯凯孚公司 Electrically conductive and self-lubricating bearing bushing, bearing comprising same and method of manufacturing same
CN112145548A (en) * 2020-08-31 2020-12-29 清华大学 Self-powered rolling bearing, bearing assembly and rotary machine
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