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CN112747032A - Self-power-generation monitoring roller bearing - Google Patents

Self-power-generation monitoring roller bearing Download PDF

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Publication number
CN112747032A
CN112747032A CN202110151550.3A CN202110151550A CN112747032A CN 112747032 A CN112747032 A CN 112747032A CN 202110151550 A CN202110151550 A CN 202110151550A CN 112747032 A CN112747032 A CN 112747032A
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CN
China
Prior art keywords
electrode
roller
outer ring
ring
electrode fingers
Prior art date
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Granted
Application number
CN202110151550.3A
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Chinese (zh)
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CN112747032B (en
Inventor
王淑云
任泽峰
杨泽萌
陈松
曹红兵
吴鸣
程光明
曾平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Science City Intellectual Property Operation Center Co ltd
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Zhejiang Normal University CJNU
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Priority to CN202110151550.3A priority Critical patent/CN112747032B/en
Publication of CN112747032A publication Critical patent/CN112747032A/en
Application granted granted Critical
Publication of CN112747032B publication Critical patent/CN112747032B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/361Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/34Rollers; Needles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/62Selection of substances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00Electrostatic generators or motors using a solid moving electrostatic charge carrier
    • H02N1/04Friction generators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2233/00Monitoring condition, e.g. temperature, load, vibration

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

Abstract

The invention relates to a self-generating monitoring roller bearing, and belongs to the technical field of bearing monitoring and new energy. The outer ring is arranged on the inner ring, the shell bottom is arranged at the end part of the outer ring, a circuit board, a sensor and a binding post are arranged on the shell bottom, an auxiliary electrode is arranged on the shell bottom or the outer ring, and the sensor, the binding post and the auxiliary electrode are connected with the circuit board through different lead groups; an electrode is arranged in the outer ring, the outer ring is of a split structure or an integral structure, the electrode is composed of an electrode ring, electrode fingers and a lead terminal, the electrode ring and the electrode fingers are embedded in the outer ring, and the roller is not overlapped with the electrode ring and is completely overlapped with the electrode fingers in the length direction; different friction charges can be generated in the mutual rolling contact process of the roller and the outer ring, the roller is alternately overlapped and separated from the electrode fingers in the rolling process, so that the potential difference between the roller and the electrode fingers is alternately increased and decreased, and further, the mechanical energy is converted into electric energy; the generated electric energy is processed by a conversion circuit on the circuit board and then is supplied to the sensor and the transmitting unit on the circuit board.

Description

Self-power-generation monitoring roller bearing
Technical Field
The invention belongs to the technical field of bearing monitoring and new energy, and particularly relates to a self-generating monitoring roller bearing.
Background
The bearing is an indispensable standard part in the fields of machine tools, carrying tools, mining machinery, light industrial machinery and the like, and is also one of the most vulnerable parts in a related transmission system, and 30% of faults of the rotating machinery are caused by bearing failure. Therefore, bearing condition monitoring and early failure diagnosis have attracted much attention. On-line monitoring of bearings and transmission systems thereof has become a prerequisite guarantee for reliable operation of relevant equipment in the fields of generators, ships, high-speed rails, aircrafts and the like, and performance indexes to be monitored comprise various aspects such as temperature, vibration, rotating speed, noise and the like. The initial bearing monitoring system is mainly a split externally-hung structure, belongs to non-contact remote indirect measurement, and has a long distance between a sensor and a signal source and a large error. In recent years, different forms of embedded bearing monitoring systems and bearing rotation-based micro power generation devices are proposed in succession, and the problems of system integration, measurement accuracy, autonomous power supply and the like are well solved. Most of the bearings with the self-powered monitoring function proposed at present generate electricity by utilizing an electromagnetic principle and a piezoelectric principle, the electromagnetic generation has the defects of magnetic interference and weak power generation capacity at low speed, and the piezoelectric generation has the defects of relatively large additional space and depolarization caused by overhigh temperature. Obviously, the prior art has great limitation in practical application, and various bearings with self-powered monitoring functions, which are small in size and high in integration level, and are particularly suitable for high-temperature environments, are still urgently needed by various industries.
Disclosure of Invention
The invention provides a self-generating monitoring roller bearing, which adopts the following implementation scheme: the self-power-generation monitoring roller bearing mainly comprises an inner ring, an outer ring, a roller, a support, a shell, a sensor and a circuit board.
The inner edge of the outer ring is provided with an annular raceway, the outer ring is arranged on the inner ring through a bracket and a roller, and the roller is embedded into the raceway of the outer ring; the shell bottom of the shell is arranged at the end part of the outer ring or the inner ring through a screw, the end part of the shell wall is provided with an end cover through a screw, a circuit board, a sensor and a wiring terminal are arranged on the shell bottom, an auxiliary electrode is arranged on the shell bottom or the outer ring, and the sensor, the wiring terminal and the auxiliary electrode are connected with the circuit board through different lead groups.
The electrode is arranged in the outer ring or the inner ring, the materials of the inner ring and the outer ring are the same, the material of the bracket is the same as that of the roller, and the materials of the outer ring and the roller are respectively two high polymer materials with far separated triboelectric sequences, such as: when the roller is made of polyamide, copper or aluminum, the outer ring is made of polyimide, polyvinyl chloride or polytetrafluoroethylene, or when the roller is made of polyimide, polyvinyl chloride or polytetrafluoroethylene, the outer ring is made of polyamide; the outer ring and the inner ring are of a split structure or an integral structure, the integral structure is processed by an injection molding method, and the electrode is embedded in the integral structure in the injection molding process; the split structure means that the parts of the inner side and the outer side of the electrode are separately processed and manufactured and then assembled, and the electrode is embedded into the outer layer of the outer ring or the inner layer of the inner ring.
The electrode is composed of an electrode ring, electrode fingers and lead terminals, the electrode ring is of a closed annular structure, the lead terminals and the electrode fingers are positioned on the left side and the right side of the electrode ring, the electrode fingers are uniformly distributed and the number of the electrode fingers is equal to that of the rollers, the central angle of each electrode finger is equal to that of the electrode fingers, and the value of the central angle is larger than or equal to that of the rollers; the central angle of the electrode fingers is the included angle between the connecting lines of the two side edges of the electrode fingers and the center of the outer ring, the central angle of the roller is the included angle between the tangent lines of the two rollers passing through the center of the outer ring, and the inter-electrode-finger angle is the included angle between the adjacent side edges of the two adjacent electrode fingers and the connecting line of the center of the outer ring.
The electrode ring and the electrode fingers are embedded in the outer ring or the inner ring, the roller is not overlapped with the electrode ring and is completely overlapped with the electrode fingers in the length direction, namely the roller and the electrode ring are not positioned in any axial section of the outer ring at the same time; the end face of the lead terminal is parallel and level with the side face of the outer ring and is pressed on the binding post at the bottom of the shell, the binding post is connected with the circuit board through a lead, the circuit board is connected with the auxiliary electrode or the ground through a lead, and the electrode is connected with the auxiliary electrode through the circuit board.
Taking the example of arranging the electrode in the outer ring, in the work, the roller rolls between the inner ring and the outer ring, friction charges can be generated in the mutual rolling contact process of the roller and the outer ring, induction charges are generated on the electrode fingers, and due to the different capacities of different materials for attracting electrons, the charge attributes generated by the rolling contact of the roller and the outer ring are different and generate potential difference; the roller is alternately overlapped and separated with the electrode fingers in the rolling process, so that the potential difference between the roller and the electrode fingers is alternately increased and decreased, and at the moment, if the electrode is connected with an auxiliary electrode or the ground through a lead, electronic exchange is generated between the electrode and the auxiliary electrode or the ground, so that mechanical energy is converted into electric energy; in actual work, the auxiliary electrode is arranged on the outer edge of the outer ring or the shell bottom, and the electrode and the auxiliary electrode are connected with the circuit board through leads to form a loop; the generated electric energy is processed by a conversion circuit on the circuit board and then is supplied to the sensor, the sensor obtains the temperature, the rotating speed or the vibration parameters of the bearing in real time, and the obtained performance parameter information is transmitted by a transmitting unit on the circuit board, so that the self-powered monitoring process of the bearing is completed.
In the work, the fact that the roller is overlapped with one electrode finger means that the central angle of the roller is overlapped with the central angle of the electrode finger, and the fact that the roller is symmetrically overlapped with the electrode finger means that the symmetrical center lines of the central angles of the roller and the electrode finger are overlapped; the separation of the roller from a certain electrode finger means that the central angle of the roller and the central angle of the electrode finger do not overlap. The charge characteristics generated by the relative motion between the components are related to the component materials, such as: when the outer ring is made of polytetrafluoroethylene and the roller is made of metal or nylon, negative charges are generated on the inner surface of the outer ring, and positive charges are generated on the outer surface of the roller; on the contrary, the outer ring surface generates negative charges and the roller surface generates positive charges.
Advantages and features: the overall structure is simple, the volume is small, the integration level and the reliability are high, the electromagnetic interference is avoided, the high temperature resistance is realized, the influence of the output voltage of the power generation unit by the rotating speed is small or no influence is caused, and the power generation and power supply capacity is strong.
Drawings
FIG. 1 is a sectional view of a bearing outer race provided with an electrode and an auxiliary electrode according to a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a sectional view of the structure of the outer ring with the electrode and the auxiliary electrode according to a preferred embodiment of the present invention;
FIG. 4 is a schematic view of the electrode deployment in accordance with a preferred embodiment of the present invention;
FIG. 5 is a sectional view of the structure of the inner race of the bearing of the preferred embodiment of the present invention with the electrode and the auxiliary electrode;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
fig. 7 is a sectional view showing a structure in which an electrode and an auxiliary electrode are provided on an inner periphery in a preferred embodiment of the present invention.
Detailed Description
The invention provides a self-generating monitoring roller bearing which mainly comprises an inner ring b, an outer ring a, rollers c, a support d, a shell e, a sensor s and a circuit board p.
An annular roller path is arranged on the inner edge of the outer ring a, the outer ring a is arranged on the inner ring b through a bracket d and a roller c, and the roller c is embedded into the roller path of the outer ring a; the shell bottom e2 of the shell e is mounted at the end part of the outer ring a or the inner ring b through screws, the end part of the shell wall e1 is mounted with an end cover k through screws, the shell bottom e2 is mounted with a circuit board p, a sensor s and a wiring terminal f, the shell bottom e2 or the outer ring a is provided with an auxiliary electrode j, and the sensor s, the wiring terminal f and the auxiliary electrode j are connected with the circuit board p through different lead groups.
An electrode h is arranged in the outer ring a or the inner ring b, the materials of the inner ring b and the outer ring a are the same, the material of the bracket d is the same as that of the roller c, and the materials of the outer ring a and the roller c are two high polymer materials with far separated triboelectric sequences respectively, such as: when the roller c is made of polyamide, copper or aluminum, the outer ring a is made of polyimide, polyvinyl chloride or polytetrafluoroethylene, and when the roller c is made of polyimide, polyvinyl chloride or polytetrafluoroethylene, the outer ring a is made of polyamide; when the outer ring a and the inner ring b are provided with the electrodes h, the outer ring a and the inner ring b are of a split structure or an integral structure, the integral structure refers to the integral structure of the outer ring a and the inner ring b which is processed by an injection molding method, and the electrodes h are embedded in the integral structure in the injection molding process; the split structure means that the inner side and the outer side of the electrode h on the outer ring a or the inner ring b are respectively and independently processed and manufactured and then assembled, and the electrode h is embedded in the outer layer of the outer ring a or the inner layer of the inner ring b.
The electrode h is composed of an electrode ring h1, electrode fingers h2 and a lead terminal h3, the electrode ring h1 is of a closed annular structure, the lead terminals h3 and the electrode fingers h2 are located on the left side and the right side of the electrode ring h1, the electrode fingers h2 are uniformly distributed and the number of the electrode fingers h2 is equal to the number of the rollers c, the central angle Q of the electrode fingers h2 is equal to the inter-electrode-finger angle Q2, and the value of the central angle Q is larger than or equal to the central angle Q3 of the rollers c; the central angle Q of the electrode finger h2 is the angle between the connecting lines of the two side edges of the electrode finger h2 and the center of the outer ring a, the central angle Q3 of the roller c is the angle between the tangent lines of the two rollers c passing through the center of the outer ring a, and the inter-electrode-finger angle Q2 is the angle between the connecting lines of the adjacent side edges of the two adjacent electrode fingers h2 and the center of the outer ring a.
The electrode ring h1 and the electrode fingers h2 are embedded in the outer ring or the inner ring b, the roller c is not overlapped with the electrode ring h1 in the length direction and is completely overlapped with the electrode fingers h2, namely the roller c and the electrode ring h1 are not positioned in any axial section of the outer ring a at the same time; the end face of the lead terminal h3 is flush with the side face of the outer ring a or the inner ring b and is pressed on the binding post f of the shell bottom e2, the binding post f is connected with the circuit board p through a lead, the circuit board p is connected with an auxiliary electrode or the ground through a lead, and the electrode h is connected with the auxiliary electrode j through the circuit board p.
Taking the electrode h in the outer ring a as an example, in operation, the roller c rolls between the inner ring b and the outer ring a, friction charges are generated in the process that the roller c and the outer ring a are contacted with each other and roll, induction charges are generated on the electrode finger h2, and due to different materials with different electron attracting capabilities, the charge attributes generated by the roller c and the outer ring a in rolling contact are different; the roller c is alternately overlapped and separated with the electrode finger h2 in the rolling process, so that the potential difference between the roller c and the electrode finger h2 is alternately increased and decreased, at the moment, if the electrode h is connected with an auxiliary electrode j or the ground through a lead, electronic exchange is generated between the electrode h and the auxiliary electrode j or the ground, and mechanical energy is converted into electric energy; in actual work, the auxiliary electrode j is arranged on the outer edge of the outer ring a or the shell bottom e2, and the electrode h and the auxiliary electrode j are connected with the circuit board p through leads to form a loop; the generated electric energy is processed by a conversion circuit on the circuit board p and then is supplied to a sensor s, the sensor s obtains the temperature, the rotating speed or the vibration parameters of the bearing in real time, and the obtained performance parameter information is transmitted by a transmitting unit on the circuit board p, so that the self-powered monitoring process of the bearing is completed.
In the above work, the overlapping of the roller c and one electrode finger h2 means that the central angle Q3 of the roller c is overlapped with the central angle Q of the electrode finger h2, and the symmetrical overlapping of the roller c and the electrode finger h2 means that the symmetrical center lines of the central angles are overlapped; the separation of the roller c from a certain electrode finger h2 means that the central angle Q3 of the roller c has no overlap with the central angle Q of the electrode finger h 2; fig. 2 shows the case where the roller c completely and symmetrically overlaps the electrode finger h 2. The charge characteristics generated by the relative motion between the components are related to the component materials, such as: when the outer ring a is made of polytetrafluoroethylene and the roller c is made of metal or nylon, negative charges are generated on the inner surface of the outer ring a, and positive charges are generated on the outer surface of the roller c; on the contrary, the outer ring a surface generates negative charges and the roller c surface generates positive charges.
Compared with the existing self-power-generation monitoring bearing, the bearing provided by the invention has the advantages of simple overall structure, small volume, high integration level and reliability, no electromagnetic interference, high temperature resistance, small or no influence of the output voltage of the power generation unit on the rotating speed, and strong power generation and power supply capabilities.

Claims (2)

1. A roller bearing capable of monitoring self power generation mainly comprises an inner ring and an outer ring, a roller, a support, a shell, a sensor and a circuit board, wherein the outer ring is arranged on the inner ring through the support and the roller; the method is characterized in that: the materials of the inner ring and the outer ring are the same, the materials of the bracket and the roller are the same, and the materials of the outer ring and the roller are two high polymer materials with far-spaced triboelectric sequences respectively; the outer ring or the inner ring is internally provided with an electrode, the outer ring and the inner ring are of a split structure or an integral structure, the electrode is composed of an electrode ring, electrode fingers and lead terminals, the electrode fingers are uniformly distributed and the number of the electrode fingers is equal to that of the rollers, the central angle of the electrode fingers is equal to the angle between the electrode fingers, and the value of the central angle is larger than or equal to that of the rollers; the electrode ring and the electrode fingers are embedded in the outer ring, and the roller is not overlapped with the electrode ring and is completely overlapped with the electrode fingers in the length direction; the electrode and the auxiliary electrode are connected with the circuit board through a lead to form a loop; different friction charges are generated in the mutual rolling contact process of the roller and the outer ring, the roller is alternately overlapped and separated from the electrode fingers in the rolling process, and further the potential difference between the roller and the electrode fingers is alternately increased and decreased, so that mechanical energy is converted into electric energy; the generated electric energy is processed by a conversion circuit on the circuit board and then is supplied to the sensor and the transmitting unit on the circuit board.
2. A self-powered monitored rolling bearing according to claim 1, characterized in that: the material of the outer ring and the material of the inner ring are polyimide, polyvinyl chloride or polytetrafluoroethylene when the material of the roller is polyamide, copper or aluminum, and the material of the outer ring and the material of the inner ring are polyamide when the material of the roller is polyimide, polyvinyl chloride or polytetrafluoroethylene.
CN202110151550.3A 2021-02-04 2021-02-04 Self-power-generation monitoring roller bearing Active CN112747032B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110151550.3A CN112747032B (en) 2021-02-04 2021-02-04 Self-power-generation monitoring roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110151550.3A CN112747032B (en) 2021-02-04 2021-02-04 Self-power-generation monitoring roller bearing

Publications (2)

Publication Number Publication Date
CN112747032A true CN112747032A (en) 2021-05-04
CN112747032B CN112747032B (en) 2022-07-12

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016084843A (en) * 2014-10-24 2016-05-19 日本精工株式会社 Rolling bearing device
WO2019134065A1 (en) * 2018-01-02 2019-07-11 舍弗勒技术股份两合公司 Bearing assembly capable of generating electricity and bearing capable of generating electricity
CN111692250A (en) * 2020-06-17 2020-09-22 腾讯科技(深圳)有限公司 Friction power generation device based on friction type brake and friction type brake
CN112145548A (en) * 2020-08-31 2020-12-29 清华大学 Self-powered rolling bearing, bearing assembly and rotary machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016084843A (en) * 2014-10-24 2016-05-19 日本精工株式会社 Rolling bearing device
WO2019134065A1 (en) * 2018-01-02 2019-07-11 舍弗勒技术股份两合公司 Bearing assembly capable of generating electricity and bearing capable of generating electricity
CN111692250A (en) * 2020-06-17 2020-09-22 腾讯科技(深圳)有限公司 Friction power generation device based on friction type brake and friction type brake
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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